Service Manual EMD

ELECTRO-MOTIVE DIVISION GENERAL MOTORS CORPORATION

0

GT46MAC INDIAN STATE RAILWAYS LOCOMOTIVE SERVICE MANUAL

EMD Part No. S00171EP Road Nos. 12001 thru 12013

Electro-Motive Division General Motors Corporation La Grange, Illinois 60525 USA Telephone: 1-800-255-5355 Fax: 708-387-6626

ELECTRO-MOTIVE DIVISION GENERAL MOTORS CORPORATION

NOVEMBER, 1999(To order this publication, please use part number S00171EP)

Document Number S00171EP @Copyright November 1999 Electro-Motive Division, General Motors Corporation. All rights reserved. Neither this document, nor any part thereof, may be reprinted without the expressed written consent of the General Motors Locomotive Group. Contact EMD Customer Publications Office.

0

FOREWORD The purpose of this manual is to act as a guide for servicing a GT46MAC locomotive and its equipment. Although minor variations can occur, equipment selected for coverage was chosen as representative of this model. When special or extra equipment is involved, consult specific drawings or instructions as provided by the railroad. Information contained in this manual is based on data available when released for printing. Minor equipment differences are due to changes made after the manual was published.

These instructions do not claim to cover all details or variations in equipment or to provide for every possibility in connection with installation, operation, or maintenance. Should more information be desired or particular problems arise which are not covered for the user's purposes, the matter should be referred to the Electro-Motive Division. This manual is intended for qualified service personnel. It provides an overview of EMD locomotive systems and equipment as well as specific electrical and mechanical procedures which can be performed on-board the locomotive.

WARNING The term qualified, in this context, means skilled personnel; knowledgeable in proper safety procedures and trained to perform maintenance on an EMD AC Series locomotive with a 3-phase AC drive. The information herein was compiled for EMD model GT46MAC locomotives equipped with special equipment and computer software.

Information about equipment that must be removed from the locomotive for service is available in the standard EMD Maintenance Instruction format or in vendor publications. Maintenance information involving the diesel engine and its auxiliary equipment is provided in the EMD Engine Maintenance Manual. Information about locomotive operation can be found in the GT46MAC Locomotive Systems and Operation Manuals.

Forward 1

WARNING This locomotive power system operates with a very high and potentially dangerous DC Link voltage that could be present in the electrical cabinets even after the locomotive has been shut down for an extended time period. Refer to Appendix C: SAFETY PRECAUTIONS FOR GT46MAC LOCOMOTIVES before inspecting, operating, or servicing this locomotive equipment.

2 GT46MAC Locomotive Service Manual

0

PREFACE The GT46MAC is equipped with a microprocessor based computer control system. The microprocessor is referred to as the EM2000 Locomotive Control Computer. This computer controlled system is equipped with a Diagnostic Display System(DDS) in the cab to provide an interface between the locomotive engineer and the computer. The computer is programmed to monitor and control locomotive traction power, record and indicate faults, and allow diagnostic testing.This manual is intended to be read in sequence - it is divided into the following sections

Section 0: GENERAL INFORMATION Section 1: ENGINE STARTING Section 2: FUEL SYSTEM Section 3: LUBRICATING OIL Section 4: COOLING SYSTEM Section 5: FORCED AIR Section 6: COMPRESSED AIR Section 7: HTSC BOGIE Section 8: ELECTRICAL EQUIPMENT Section 9: ELECTRICAL CONTROL Section 10: LOAD TEST Section 11: HIGH POTENTIAL TESTING Section 12: TROUBLESHOOTING Section 13: DOWNLOAD EVALUATION SERVICE DATA PAGES A Service Data page is included at the back of some sections of the Locomotive Service Manual. This page may provide the following: 1. 2. 3. 4. 5.

Reference to part numbers for serviceable equipment. Reference to applicable Maintenance Instructions and technical manuals. Reference to applicable tool and testing apparatus numbers. Specific system values for operation or testing. Refer to the GT46MAC Locomotive Service Parts Catalog applicable to the unit being serviced for component part numbers and ordering information.

UNITS OF MEASURE Units of measurement appearing in this manual are shown in Metric and U.S. standard units. A conversion table is provided at the back of the manual to convert U.S. standard units to metric units. Forward 3

4 GT46MAC Locomotive Service Manual

0

TABLE OF CONTENTS WARNING ............................................................................................................................................... 2FW PREFACE ................................................................................................................................................. 3FW SECTION 0. GENERAL INFORMATION ..................................................................................... 0-1 GENERAL CHARACTERISTICS.............................................................................................................. 0-1 EQUIPMENT LOCATION ......................................................................................................................... 0-6 LOCOMOTIVE OPERATION.................................................................................................................. 0-10 DIESEL ENGINE ...................................................................................................................................... 0-12 COMPUTER CONTROL SYSTEM LOGIC CHANNELS...................................................................... 0-14 ELECTRICAL REFERENCE DESIGNATIONS ..................................................................................... 0-15 INTRODUCTION TO KNORR AIR BRAKE SYSTEM ......................................................................... 0-19 INTRODUCTION TO EM2000 LOCOMOTIVE DISPLAY................................................................... 0-22 INTRODUCTION TO FLANGE LUBE SYSTEM .................................................................................. 0-29 ALERTER (VIGILANCE) SYSTEM ....................................................................................................... 0-30 GT46MAC SAFETY PRECAUTIONS..................................................................................................... 0-31 SECTION 1. ENGINE STARTING AND STOPPING ................................................................... 1-1 INTRODUCTION ....................................................................................................................................... 1-1 STARTING EQUIPMENT.......................................................................................................................... 1-1 STARTING PROCEDURES FOR GT46MAC DIESEL ENGINES ......................................................... 1-6 STOPPING PROCEDURES FOR GT46MAC DIESEL ENGINES ........................................................ 1-14 STARTING MOTOR MAINTENANCE .................................................................................................. 1-17 SECTION 2. FUEL SYSTEM........................................................................................................ 2-1 INTRODUCTION ....................................................................................................................................... 2-1 FUEL SUCTION STRAINER..................................................................................................................... 2-2 FUEL PUMP AND MOTOR....................................................................................................................... 2-3 FUEL PUMP CIRCUIT............................................................................................................................... 2-4 PREHEATER AND MIXING VALVE ...................................................................................................... 2-6 PRIMARY FUEL FILTER BYPASS VALVE AND GAUGE................................................................. 2-10 ENGINE MOUNTED FUEL FILTER ASSEMBLY ................................................................................ 2-10 DRAINING CONDENSATE FROM THE FUEL TANK ........................................................................ 2-12 FILLING THE FUEL TANK ................................................................................................................... 2-12 FUEL STORAGE FACILITIES ................................................................................................................ 2-13 EMERGENCY FUEL CUTOFF SWITCHES .......................................................................................... 2-13 ROUTINE MAINTENANCE PARTS AND EQUIPMENT..................................................................... 2-15 SERVICE DATA - FUEL SYSTEM......................................................................................................... 2-15

Table Of Contents

1

SECTION 3. LUBRICATING OIL SYSTEM ................................................................................. 3-1 INTRODUCTION........................................................................................................................................3-1 OIL LEVEL GAUGE (DIPSTICK) .............................................................................................................3-1 FILLING OR ADDING OIL TO SYSTEM ................................................................................................3-3 OIL FILTER INSPECTION AND MAINTENANCE ................................................................................3-5 BYPASS VALVE ASSEMBLY ..................................................................................................................3-8 OIL COOLER INSPECTION AND MAINTENANCE ..............................................................................3-8 HOT OIL DETECTOR ..............................................................................................................................3-10 TURBOCHARGER ...................................................................................................................................3-12 TURBOCHARGER LUBE PUMP CIRCUIT ...........................................................................................3-12 LUBRICATING OIL SAMPLING AND ANALYSIS .............................................................................3-13 PRELUBRICATION OF ENGINE............................................................................................................3-14 SERVICE DATA - LUBRICATING OIL SYSTEM ................................................................................3-15 SECTION 4. COOLING SYSTEM ................................................................................................ 4-1 INTRODUCTION........................................................................................................................................4-1 RADIATORS AND COOLING FANS .......................................................................................................4-2 COOLING FAN TWO-SPEED AC MOTOR CONTROL .........................................................................4-3 INSPECTION AND CLEANING OF RADIATORS..................................................................................4-7 HOT ENGINE CONDITION.......................................................................................................................4-8 COOLING SYSTEM PRESSURIZATION.................................................................................................4-8 OPERATING WATER LEVEL ................................................................................................................4-11 FILLING THE COOLING SYSTEM ........................................................................................................4-12 OBTAINING AN ENGINE WATER SAMPLE .......................................................................................4-13 DRAINING THE COOLING SYSTEM....................................................................................................4-13 SERVICE DATA - COOLING SYSTEM .................................................................................................4-14 SECTION 5. FORCED AIR SYSTEMS ........................................................................................ 5-1 INTRODUCTION........................................................................................................................................5-1 INERTIAL AIR FILTERS ...........................................................................................................................5-3 MAIN GENERATOR BLOWER ................................................................................................................5-4 TRACTION MOTOR BLOWER ................................................................................................................5-4 TRACTION MOTOR BLOWER INLET VANE OPERATION ................................................................5-4 TCC BLOWER ............................................................................................................................................5-6 INSPECTION AND MAINTENANCE OF THE CENTRAL AIR SYSTEM............................................5-7 SERVICE DATA - FORCED AIR SYSTEMS .........................................................................................5-16 SECTION 6. COMPRESSED AIR SYSTEMS ............................................................................. 6-1 INTRODUCTION........................................................................................................................................6-1 WLNA9BB AIR COMPRESSOR ...............................................................................................................6-2 AIR COMPRESSOR CONTROL................................................................................................................6-3 MAIN RESERVOIRS ..................................................................................................................................6-7 COMPRESSED AIR FILTERS AND DRAINS..........................................................................................6-8 GRAHAM WHITE TWIN TOWER AIR DRYER ...................................................................................6-11 KNORR/NYAB AIR BRAKE SYSTEM (CCB 1.5).................................................................................6-17 SANDING SYSTEM .................................................................................................................................6-30 MISCELLANEOUS COMPRESSED AIR EQUIPMENT .......................................................................6-35 SERVICE DATA - COMPRESSED AIR SYSTEMS...............................................................................6-41

2 GT46MAC LOCOMOTIVE SERVICE MANUAL

0 SECTION 7. HTSC BOGIE........................................................................................................... 7-1 INTRODUCTION ....................................................................................................................................... 7-1 ROUTINE MAINTENANCE AND INSPECTION.................................................................................... 7-7 TRACTION MOTORS.............................................................................................................................. 7-22 TRUCK/BOGIE REMOVAL .................................................................................................................... 7-27 WHEEL FLANGE LUBRICATING SYSTEM ........................................................................................ 7-30 SERVICE DATA - HTSC BOGIE ............................................................................................................ 7-38 SECTION 8. ELECTRICAL EQUIPMENT.................................................................................... 8-1 INTRODUCTION ....................................................................................................................................... 8-1 MAIN GENERATOR.................................................................................................................................. 8-3 COMPANION ALTERNATOR................................................................................................................ 8-14 AC AUXILIARY GENERATOR.............................................................................................................. 8-15 C1-8: DC LINK INVERTER INPUT CAPACITORS .............................................................................. 8-17 DCL123, DCL456: DC LINK SWITCHGEAR ........................................................................................ 8-18 TRACTION MOTORS.............................................................................................................................. 8-18 RADIATOR COOLING FAN MOTORS ................................................................................................. 8-19 DYNAMIC BRAKE GRID BLOWER ASSEMBLY ............................................................................... 8-20 TURBO LUBE PUMP MOTOR ............................................................................................................... 8-20 FUEL PUMP MOTOR .............................................................................................................................. 8-20 STARTING MOTORS AND SOLENOIDS ............................................................................................. 8-21 CAB EQUIPMENT ................................................................................................................................... 8-22 ELECTRICAL CONTROL (#1) CABINET EQUIPMENT ..................................................................... 8-38 DIAGNOSTIC PANEL ............................................................................................................................. 8-66 FUSE AND SWITCH COMPARTMENT ................................................................................................ 8-77 AC (#3) CABINET .................................................................................................................................... 8-80 MISCELLANEOUS LOCOMOTIVE EQUIPMENT............................................................................... 8-82 SECTION 9A. ELECTRICAL CONTROL SYSTEM .................................................................. 9A-1 OVERVIEW ............................................................................................................................................. 9A-1 MAIN GENERATOR............................................................................................................................... 9A-2 DC LINK EQUIPMENT .......................................................................................................................... 9A-3 EM2000 LOCOMOTIVE COMPUTER .................................................................................................. 9A-6 POWER SYSTEM VARIABLES .......................................................................................................... 9A-13 SECTION 9B. EM2000 LOCOMOTIVE COMPUTER .............................................................. 9B-1 INTRODUCTION .................................................................................................................................... 9B-1 HANDLING ELECTRONIC EQUIPMENT - GENERAL ................................................................... 9B-1 EM2000 LOCOMOTIVE CONTROL COMPUTER............................................................................... 9B-5 DIO OPERATION .................................................................................................................................. 9B-11 PANEL MOUNTED MODULES .......................................................................................................... 9B-29 THE EM2000 DISPLAY ........................................................................................................................ 9B-41 MAIN MENU ITEMS ............................................................................................................................ 9B-45 SECTION 9C. AC MOTOR - THEORY OF OPERATION ......................................................... 9C-1 AC MOTOR POWER OPERATION - NO LOAD.................................................................................. 9C-1 POWER OPERATION - APPLY LOAD ................................................................................................. 9C-6 INCREASE POWER .............................................................................................................................. 9C-12 DYNAMIC BRAKE ............................................................................................................................... 9C-15 PULSE WIDTH MODULATION TECHNIQUES ................................................................................ 9C-20 LOCOMOTIVE OPERATING CHARACTERISTICS ......................................................................... 9C-22

Table Of Contents

3

SECTION 9D. INVERTER OPERATIONS ................................................................................. 9D-1 GTO SWITCHING ................................................................................................................................... 9D-1 DYNAMIC BRAKE/REGENERATIVE OPERATION ........................................................................ 9D-13 TCC PROTECTION SCHEME .............................................................................................................. 9D-20 SECONDARY WHEEL SLIP PROTECTION ...................................................................................... 9D-24 SECTION 9E. TCC COMPONENTS .......................................................................................... 9E-1 SAFETY PRECAUTIONS ....................................................................................................................... 9E-1 ORIENTATION AND LAYOUT............................................................................................................. 9E-2 INVERTER COMPONENTS ................................................................................................................... 9E-5 SECTION 9F. TRACTION COMPUTER MODULES.................................................................. 9F-1 TRACTION COMPUTER MODULE QUICK REFERENCE GUIDE ....................................................9F-4 POWER SUPPLIES ...................................................................................................................................9F-6 INPUTS AND OUTPUTS .......................................................................................................................9F-10 SYSTEM CONTROLS ............................................................................................................................9F-16 SECTION 9G. OPERATIONAL CONTROL MODES ................................................................ 9G-1 OP MODE DETERMINATION ............................................................................................................... 9G-1 STANDARD OP MODES (AC Only) ...................................................................................................... 9G-2 CONTROL MODES ................................................................................................................................. 9G-5 FUNDAMENTAL SIGNAL VALUES FOR 3939 THP, GT46MAC ................................................... 9G-12 SECTION 9H. LOAD CONTROL ............................................................................................... 9H-1 TORQUE................................................................................................................................................... 9H-2 ENGINE POWER CAPABILITIES ......................................................................................................... 9H-4 TRACTION POWER REFERENCE ........................................................................................................9H-8 TCC POWER CONTROLLER...............................................................................................................9H-11 FINAL VOLTAGE REFERENCE ......................................................................................................... 9H-15 LOCOMOTIVE TORQUE LIMIT ......................................................................................................... 9H-19 TCC TORQUE REFERENCE ................................................................................................................ 9H-22 MAIN GENERATOR FIELD CURRENT REFERENCE ..................................................................... 9H-27 DEFAULT LIMITS FOR NON-ACTIVE FUNCTIONS....................................................................... 9H-28 STANDARD LOAD CONTROL VARIABLES - MONITOR SYMBOLS AND DISPLAY NAMES9H-29 SECTION 9I. ADHESION ............................................................................................................ 9I-1 CONTROLLED CREEP ............................................................................................................................ 9I-1 BACK-UP WHEEL SLIP CONTROL SYSTEM...................................................................................... 9I-1 STARTING SYSTEM - WHEEL SLIP ..................................................................................................... 9I-1 DEFINITION ............................................................................................................................................. 9I-2 WHEEL SLIP STATUS VARIABLE ....................................................................................................... 9I-2 SIGNAL AVAILABILITY ........................................................................................................................ 9I-2 CONTROLLED-CREEP SYSTEM - General........................................................................................... 9I-3 CONTROLLED CREEP & SPEED LIMIT GENERATION.................................................................... 9I-8 WHEEL SLIP LIGHT.............................................................................................................................. 9I-14 SAND CONTROL LOGIC ...................................................................................................................... 9I-15 SECTION 10. LOAD TEST AND HORSEPOWER EVALUATION ............................................ 10-1 INTRODUCTION......................................................................................................................................10-1 DESCRIPTION ..........................................................................................................................................10-1 LOAD TEST PROCEDURES ...................................................................................................................10-5 CALCULATING HORSEPOWER & EVALUATING RESULTS ........................................................10-15 AUXILIARY EQUIPMENT LOAD ON DIESEL ENGINE ..................................................................10-16


0 SECTION 11. HIGH POTENTIAL TESTING .............................................................................. 11-1 TEST EQUIPMENT .................................................................................................................................. 11-1 SAFETY PRECAUTIONS ........................................................................................................................ 11-1 MEGGER/HI-POT/WELDING PRECAUTIONS .................................................................................... 11-2 LOCOMOTIVE WELDING PREPARATIONS FOR GT46MAC........................................................... 11-2 INSULATION RESISTANCE TEST........................................................................................................ 11-6 HIGH POTENTIAL TEST ........................................................................................................................ 11-8 SECTION 12A. TROUBLESHOOTING TIPS.......................................................................... 12A-1 GROUND RELAY PROCEDURES ...................................................................................................... 12A-1 GENERATOR FIELD OVER-EXCITATION FAULTS....................................................................... 12A-1 HOT ENGINE, THROTTLE 6 LIMIT:.................................................................................................. 12A-1 KNORR SET UP TO SUPPRESS ALERTER FUNCTIONS............................................................... 12A-2 TCC OVERVOLTAGE FAULTS .......................................................................................................... 12A-2 NO COMPANION ALTENATOR OUTPUT ........................................................................................ 12A-2 CHECK FOR SLIPPED PINION ........................................................................................................... 12A-2 DIO 300 CARDS .................................................................................................................................... 12A-3 ADA 305 MODULE ............................................................................................................................... 12A-3 SECTION 12B. EM2000 AND TRACTION COMPUTER DOWNLOADS ............................... 12B-1 INTRODUCTION .................................................................................................................................. 12B-1 DOWNLOAD PROCEDURE ................................................................................................................ 12B-1 TRACTION COMPUTER COMMUNICATIONS................................................................................ 12B-6 SECTION 13. DOWNLOAD EVALUATION ............................................................................... 13-1 DC Link Overcurrent Protection................................................................................................................ 13-1 DC Link Undervoltage Protection ............................................................................................................. 13-2 DC Link Overvoltage Protection ............................................................................................................... 13-3 OPERATIONAL MODES......................................................................................................................... 13-4 TESTING OP MODES (AC and DC) ....................................................................................................... 13-7 DOWNLOAD EVALUATION ............................................................................................................... 13-19 Appendix A . DATA PACKS ...................................................................................................... A-1 Appendix B. SIGNAL DESCRIPTIONS .................................................................................... B-1 Appendix C . SAFETY PRECAUTIONS..................................................................................... C-1 Appendix D. TROUBLESHOOTING FLOWCHARTS................................................................ D-1

Table Of Contents

5


0

SECTION 0. GENERAL INFORMATION GENERAL CHARACTERISTICS Locomotive Model Designation: GT46MAC Locomotive Type: (C-C) 0660 Nominal Locomotive Power: 4000 CV (3939 HP)

Diesel Engine Engine Model(s): 710G3B Number of Cylinders: 16 Engine Type: Two-Stroke, Turbocharged Cylinder Arrangement: 45° “V” Compression Ratio: 16:1 Displacement per Cylinder: 11 635 cm3 (710 Cu.In.) Cylinder Bore: 230.19 mm (9-1/16”) Cylinder Stroke: 279.4 mm (11”) Rotation (Facing Flywheel End): Counterclockwise Full Speed: 904 RPM Normal Idle Speed: 269 RPM Low Idle Speed: 200 RPM

Main Generator Assembly MODEL NUMBERS: Main Generator: TA17-CA6B Traction Alternator (Includes Rectifier): TA17 Companion Alternator: CA6B TRACTION ALTERNATOR RECTIFIED OUTPUT RATINGS: Maximum Voltage: 2600 VDC Max. Continuous Current: 1250 Amperes COMPANION ALTERNATOR OUTPUT RATING: 230 Volts AC Maximum Voltage: 230 VAC Frequency at 904 RPM: 120 HZ Maximum Power: 250 KVA (Power factor 0.8) GENERAL INFORMATION 0-1

Auxiliary Generator Model:5A-8147 RECTIFIED OUTPUT RATINGS: Nominal Voltage: 74 volts DC (Rectified) Maximum Power: 18 kW

Traction Motors Model: Siemens 1TB-2622-0TA02 Quantity: 6 (3 in parallel per bogie) Type:

3 Phase AC Induction, Axle Hung with Tapered Roller Support Bearings, Forced Air Ventilated Nominal Ratings: 500 KW, 2027 VAC, 3220 RPM

Traction Inverters (Traction Control Converters TCC1, TCC2) Model: 1GE420 050 9010.00 MB74 Rating: 1430 KW Quantity: 2 (one per bogie {truck}) Type: Voltage Source Inverter With Gate Turn-Off Thyristors

Bogies Model: HTSC Gear Ratio: 90:17 DRIVING WHEELS: Quantity: 3 Wheel Sets per bogie {truck} Diameter:1092mm (43 inches) BRAKE RIGGING: Type: Single Shoe 406.4mm (16 inches) Shoe Material: Composite Cylinders Brake: 4 per bogie {truck}

0-2 GT46MAC LOCOMOTIVE SERVICE MANUAL

0

Compressed Air System AIR BRAKE CONTROL SYSTEM: Knorr CCB Equipment AIR COMPRESSOR: Model: WLNA9BB Type: Two Stage, 3 Cylinder Coolant: Engine Coolant Displacement at 900 RPM:7.19 M³/Min (254 Cu.Ft./Min.) Lube Oil Capacity: 9.98 Litres (2.64 US Gallons)

Locomotive Storage Batteries Model: Surrette 16CH-25 Unitized Arrangement: 2 Series-connected 16-Cell Lead-acid Batteries Total Quantity of Cells: 32 Total Potential of 2 Series-connected Batteries: 64 Volts Specific Gravity of Electrolyte: 1.250 8 hour Capacity: 500 Amp. Hr.

Supplies/Capacities Lube Oil System Capacity: 950 Litres (251 US Gallons) Cooling System Capacity:1045 Litres (276 US Gallons) Sand Boxes (8) Capacity: 0.04M³ Box (1.5 cubic ft./box) Fuel Capacity: 6000 Litres (1585 US Gallons)

Nominal Dimensions Height, over Cooling Hood: 4.16 M (13’ 7.75”) Height over Horn: 4.22M (13’ 10” Height over Cab: 3.94 M (12’ 11”) Width over Hand Rails: 2.92 M (9’ 7.12”) Width over Underframe: 2.74 M (9’ 0”) Width over Cab: 2.74M (9’ 0”) Width over Brake Cylinders: 3.07 M (10’ 1”)

GENERAL INFORMATION 0-3

Locomotive Minimum and Maximum Speeds/Tractive Effort Min. Continuous Speed At Max - Continuous Tractive Effort: 22.5 Km/h (15Mph) Max Continuous Speed (Based on T.M. Max. Rated RPM):120 Km/h (74.6 Mph) Maximum Stall Tractive Effort: 540KN Max. Continuous Tractive Effort: 400 KN Reduced Tractive Effort Limit: 294 KN

Minimum Curve Negotiation Capability Information below based on GT46MAC locomotive(s) equipped with “F” couplers, and box car equipped with “E” couplers. Single Unit: 174 meter (570.8 Ft.) Radius - 10° Curve Two GT46MAC Units Coupled: 174 Meter (570.8 Ft) Radius -10° Curve


0

Weights NOTE: The weights listed are approximate and presented for material handling. Total Loaded Locomotive Weight on Rails: 126010 Kg (277, 800 Lbs.) Air Compressor: 1043 Kg (2300Lbs.) Auxiliary Generator and Blower Assembly: 647 Kg (1428 Lbs.) Axle/Gear/Wheel Assembly: 2631 Kg (5800 Lbs.) Diesel Engine (16-710G3B): 1793 Kg (39 600 Lbs.) Dynamic Brake Fan and Motor Assembly: 567 Kg (1250 Lbs.) Dynamic Brake Fan Motor: 91 Kg (200 Lbs.) Dynamic Brake Hatch Assembly: 1588 Kg (3500 Lbs.) Fuel Filter Assembly, Primary (Dual): 59 Kg (129 Lbs.) Fuel Pump Motor : 34 Kg (75 Lbs.) Fuel Pump (without motor): 2.2 Kg (5 Lbs.) Fuel Tank: 5779 Kg (12, 740 Lbs.) Inertial Air Filters: 159 Kg (350 Lbs.) Lube Oil Cooler: 386 Kg (850 Lbs.) Lube Oil Filter Assembly: 345 Kg (760 Lbs.) Lube Oil Filter Element: 2.2 Kg (5 Lbs.) Main Generator and Companion Alternator Assembly: 8709 Kg (19,200 Lbs.) Radiator Assembly: 1134 Kg (2500 Lbs.) Radiator Fan Assembly: 408 Kg (900Lbs.) Starter Motor: 36 Kg (79 Lbs.) Storage Battery, 16-Cell: 703 Kg (1550 Lbs.) SCR Excitation Bridge Assembly: 19 Kg (41 Lbs.) Traction Motor: 3016 Kg (6650 Lbs.) Bogie Assembly, HTSC: 21773 Kg (48,000 Lbs.) Turbocharger: 953 Kg (2100 Lbs.) Turbocharger Lube (Soakback) Pump & Motor: 34 Kg (75 Lbs.) Water Pump: 49 Kg (109 Lbs.)


1) Head light 2) Inertial Filter Air Inlet 3) Starting Fuse and Battery Knife Switch 4) Handrails 5) Cooling System Air Inlet 6) Radiator and Fan Access 7) Coupler “E/F” Type 8) Sanding Box (8) 9) Jacking Pads (4)

use F-gi41957 new arrows


10) Wheels (6) 11) Fuel Tank 12) Compressed Air System Main Reservoirs 13) Battery Box 14) Trucks (3 axle 3 motor HTSC type) Qty. 2 15) Underframe 16) Dynamic Brake Grids 17) Dynamic Brake Fans (2)

Equipment Location

Figure 0-1 GT46MAC General Arrangement L/H Side - Outside view

1) Electrical Control Cabinet 2) Fuel Pump 3) Engine Starting Motors 4) Traction Control Cabinet 5) Traction Motor Cooling Air Blower 6) Main Generator/Companion Alternator Blower 7) Engine Exhaust Stack 8) Engine Exhaust Manifold

GI41958 9) 16-710G3B Diesel Engine 10) Governor 11) Engineroom Vent 12) Engine Water Tank 13) Lube Oil Cooler 14) Primary Fuel Filter 15) Air Compressor 16) Radiators 17) AC Radiator Cooling Fans (2)

18) Draft Gear 19) Air Compressor Air Filter 20) Lube Oil Filter Tank 21) Lube Oil Strainer 22) Lube Oil Sump 23) Main Generator/ Companion Alternator 24) Electrical Control Cabinet Air Filter Box 25) Traction Motors (6)

0

Figure 0-2 GT46MAC General Arrangement L/H Side - Internal View


1) Air Brake Rack 2) Engineers Control Console 3) Cab Door 4) Traction Control Cabinets 5) Inertial Air Filters 6) TCC Electronics Blower 7) Engine Air Filter

Figure 0-3 GT46MAC General Arrangement - TopView


8) Radiators 9) Engine 10) AC Auxiliary Generator 11) Inertial Filter Dust Bin Blower and Motor 12) Electrical Control Cabinet 13) Cab Seat

use f-gi41959 new callouts

0

GENERAL INFORMATION The GT46MAC locomotive, shown on the preceding illustrations, is equipped with a turbocharged 16 cylinder diesel engine to drive the main generator. The main generator converts diesel engine mechanical power into alternating current (AC) electrical power. The internal rectifier banks of the main generator convert alternating current to direct current (DC) thereby providing a DC power output. The DC output from the main generator is called the DC link voltage and is applied to the traction inverters. DC link voltage varies with the throttle position from 600 VDC at TH1 to 2600 VDC at TH8. The inverters change DC power into variable AC power. There is one traction inverter for each parallel set of three traction motors. Traction inverter TCC1 and traction inverter TCC2 invert the DC link voltage into variable voltage, variable frequency, 3 phase AC power for the induction traction motors. Each of the inverters is controlled by a separate computer. Both inverter computers are in turn controlled by a primary computer known as the EM2000 Locomotive Control Computer (LCC) that monitors and controls many locomotive functions. One EM2000 display panel, mounted in the door of the main electrical locker, is driven by the EM2000 computer and indicate operating conditions, system faults, and troubleshooting information. Electrical power produced by the main generator is distributed to the inverters through heavy duty switchgear in the #1 electrical cabinet. The switchgear directs main generator output to the traction inverters based on inputs from the primary computer. The primary computer responds to input signals from the engineer controls and feedback signals from the power equipment. Each traction motor is geared directly, with a single pinion, to a pair of driving wheels. The maximum speed of the locomotive is set by the locomotive gear ratio (wheel/motor) and wheel size. The locomotive is arranged so that the short hood or cab end is considered the front (or forward) although the unit can be operated in either direction. While each locomotive is an independent power source, several units may be combined in multiple operation to increase load capacity. The operating controls on each unit are jumpered or “trainlined” to allow all the locomotives to be simultaneously controlled from the control console in the cab of the lead unit. The cab has two driver’s consoles: One facing forward and one facing rearward.


use modified gi41956

Figure 0-4 GTMAC Power Distribution Diagram

LOCOMOTIVE OPERATION The diesel engine must be primed with fuel prior to starting. The GT46MAC, Fuel Prime/ Engine Start (FP/ ES) switch is located on the equipment rack in the locomotive long hood. Because, the GT46MAC is equipped with a Mechanical Governor, the Starting operation is the same as on earlier model locomotives. When the engine start switch is held in PRIME, the locomotive computer starts the fuel pump which pressurizes the injection system with fuel. The fuel pump moves the fuel from the fuel tank under the locomotive to the injectors. After the entire system has been supplied with fuel, the engine can be started by holding the PRIME/START switch in START. With the engine running, the fuel pump motor is powered directly by the auxiliary generator. Storage batteries provide energy to the starting motors mounted at the lower rear right hand side of the engine. Two starting motor solenoids are part of the starting motor assembly. These electrical solenoids engage the starting motor pinions with the engine ring gear. When both pinions are engaged, full battery power is applied to the starting motors to crank the diesel engine. When the diesel engine is running, it directly drives three electrical generators, a traction motor blower, an air compressor and the water and lube oil pumps. The engine-driven components in the locomotive system must convert the engine power to other forms to perform their individual functions:


0 1.

The main generator rotates at engine speed, generating alternating current (AC) power. This power is then converted to direct current (DC) power by rectifier banks within the generator assembly and applied to the DC link. A switch gear (DCL) apply the DC link voltage to traction inverter circuits. The traction inverters convert the DC link voltage to 3-phase AC power for the traction motors.

2.

The companion alternator is physically coupled to the main generator. It supplies current to excite the main generator field and to power the radiator cooling fans, the inertial filter blower motor, the TCC electronic blower motor, two traction inverter blowers, and various transductors and control devices.

3.

The auxiliary generator is driven by the engine gear train at three times the engine speed. AC power from the auxiliary generator is supplied to an external 3-phase full-wave rectifier in a battery charging assembly. It is then converted to 74 volt DC power for companion alternator excitation, control system operation, and charging locomotive batteries. The auxiliary generator also supplies 74 VDC power for the fuel and turbocharger lube oil pump motor circuits, cab fans, locomotive lighting, and other miscellaneous equipment.

4.

The air compressor, rotates at engine speed and supplies the necessary air pressure for brakes and other pneumatic devices such as sanders, windshield wipers, shutter operating cylinders, the horn and the bell.

5.

The engine gear train drives two centrifugal water pumps. One large pump is used to circulate coolant through the engine cooling system and a second smaller size pump is used to circulate coolant through the turbocharger aftercoolers.

6.

The lube oil pumps are also connected to the engine gear train. They supply lubricating oil to critical operating surfaces throughout the engine.

The main generator supplies high voltage electrical energy to the electrical cabinet. This cabinet establishes the distribution of power to the traction inverters by means of motor operated switches. Relays and control devices in the cabinet direct the flow of power as dictated by the control computer. The response of the computer is determined by locomotive operating conditions and the set up of the controls in the cab. Actual operating conditions create varying tractive load requirements. This locomotive is equipped with an Electrical Mechanical Governor (Woodward). A computer controlled load management system balances electrical load with mechanical diesel engine power. The load regulator can act to reduce generator excitation in order to balance the governor speed setting from the throttle with the engine power level determined by the the computer (EM2000). Moving the throttle to a higher position signals the computer to raise engine speed and allow more current to flow through the main generator field. The increased excitation current results in an increased DC voltage to the DC link. Increasing DC link voltage supplies more power to the traction inverters. An increase in traction inverter power causes an increase in AC power to the traction motors. In this way, engine speed and locomotive DC link power are increased progressively in throttle steps.


For dynamic brake operation, the kinetic energy of the moving train is translated into electrical energy in the traction motors, which now acts as generators. This AC motor energy must first be converted to DC power (voltage) by the traction inverters (inverter/converter) and provided to the DC link. The DC link voltage is then applied to brake grids which dissipate the electrical power in the form of heat. This loss of energy causes the train to slow down (brake). The inverter (TCC#1, TCC#2) computers monitor and control each inverter to maintain the braking effort requested by the locomotive computer (EM2000), EM2000, in turn maintains the braking effort requested by the driver. Other control and protective functions are programmed into the Display Diagnostic System which is the display for the locomotive control computer (LCC). This computer monitors critical functions in the locomotive power system and provides a display message, and in some cases an audible alarm, if a fault occurs. The computer will also change diesel engine speed in response to certain improper operating conditions such as low coolant temperature or low main reservoir pressure. There are six axle hung AC traction motors located in the bogies under the locomotive. Each traction motor is geared directly to the axle on which it is mounted. These motors are supplied AC power from the traction inverters - one traction inverter for each three motor bogie. Because actual operating conditions create varying tractive load requirements a major part of locomotive control system operation involves the interrelated functions of the throttle, the locomotive control computer, the Woodward Governor and the load regulator. The Woodward system holds the engine speed at a constant RPM as set by the EM2000. It does this by varying the fuel to the injectors which controls the amount of fuel supplied to the cylinders. The load regulator “inform” the EM2000 about the engine capability to handle the load. The computer controlled load management system balances electrical load with available mechanical diesel engine power by modifying engine speed, or generator excitation regardless of throttle position. The HTSC bogies, which house the traction wheelsets, support all of the locomotive weight, it absorbs mechanical shocks while maintaining maximum traction for the wheels. NOTE An important advantage of AC traction motors is that they are much more resistant to mechanical shock or other commutator related damage associated with DC traction motors. This will be seen throughout this manual in such areas as eliminating the precaution of reducing throttle over rail crossings and eliminating the 10 second delay when changing between power and dynamic brake operation. These considerations are only necessary for when an AC unit is operating in a multiple unit consist with other DC units.

DIESEL ENGINE The diesel engine operates on a two-stroke cycle, with power applied on each downward stroke. At the bottom of each downward stroke, cylinders are aspirated through cylinder wall ports opening to a chamber (air box) that is supplied with pressurized air from the turbocharger impeller. The pressurized air scavenges spent gases from a cylinder through multiple exhaust valves in its cylinder head. As the piston moves upward, the ports are closed off and the exhaust valves close. Air is compressed in the cylinder.


0 At the top of the stroke, fuel is injected into the cylinder and ignited by the heat of compression to provide power to drive the piston downward until the cylinder wall ports and the exhaust valves again open. The exhaust gases from the cylinders pass through a manifold to drive the turbocharger turbine wheel before flowing out through the exhaust silencer stack. When starting, and at lower power levels, there is insufficient exhaust heat energy to drive the turbine and impeller fast enough to supply all the air needed for combustion. At this time, the engine drives the turbocharger through a gear train, with the available exhaust gases providing some assistance. At high power levels, the heat energy in the exhaust is sufficient to drive the turbocharger without any assistance, and an overrunning clutch in the gear train disengages the mechanical drive from the engine. The air discharged under pressure from the turbocharger assembly is routed through aftercoolers to cool the air, before it enters the airbox, thereby increasing its density for greater combustion efficiency. The engine is equipped with engine mounted gear driven centrifugal water pumps. Coolant is pumped to the engine manifolds connected to the cylinder heads and liner jackets, and to the turbocharger aftercoolers. A coolant return manifold, in the crankcase “V,” encloses the cylinder exhaust ducts (elbows). Heated coolant is piped from the engine through the radiators, and through an oil cooler before it returns to the centrifugal pumps. The entire engine cooling system is pressurized, with pressure level limited by a relief valve in the cap on the water storage tank filler neck. Temperature probes are mounted at the engine water pump inlets to provide engine coolant temperature information to the EM2000 computer. The computer controls engine coolant temperature by independently controlling the speed of each of the two radiator cooling fan motors. Each motor can be “off,” or running at either “slow” or “fast” speed. A positive displacement gear type scavenging pump draws oil from the engine sump, through a strainer, then pumps it through filters and a cooler to a second strainer chamber. A dual oil pump receives oil from the second strainer and delivers it to engine manifolds for engine lubrication and piston cooling. Additional filtration is provided in the circuit delivering oil to the turbocharger. A separate electrically driven pump and filter provide turbocharger lubrication and cooling at engine startup and shutdown. Engine fuel is drawn from the underframe mounted tank through a mesh suction strainer to a gear type DC motor driven pump. The pump forces fuel through a two stage primary filter assembly equipped with a pressure gauge and by-pass valve that functions if the filter becomes clogged. Engine mounted fuel filters provide secondary filtration before fuel reaches the fuel injectors located at each cylinder. Excess fuel that is not injected provides injector cooling before being returned to the fuel tank. Fuel injectors supply a precisely metered quantity of atomized fuel to each cylinder at a precise moment in the firing cycle. The Woodward Governor controls injectors to maintain the proper amount of fuel needed to keep the engine speed at the requested level.


COMPUTER CONTROL SYSTEM LOGIC CHANNELS The following description provides the reader with a brief explanation of a common logic circuit that is used throughout the locomotive control system. A more detailed discussion of this circuit is supplied later in the manual. The locomotive computer system replaces most of the relay logic found on earlier locomotives. Certain devices in the 74 volt portion of the control system, such as switches, relays, etc., provide inputs to the computer control system through computer DIO (digital input/output) modules. The EM2000 computer also controls relay/contactor pickup and dropout, through the DIOs. Each DIO module input channel, Figure 0-5, is a solid-state circuit that switches “ON” when the 74 V circuit external to the channel is completed, and “OFF” when the external circuit opens .

use F43253

Figure 0-5 EM2000 Computer to 74 VDC System Connections

Each DIO module output channel is a solid-state circuit that conducts when the computer switches it “ON,” and is non-conductive (virtually “open”) when the computer switches it “OFF.” Note that the DIO module output channels do not supply current when ON, they conduct current. The channels conduct current from an external +64 V/74V feed to the 64/74 V common side. In Figure 0-5, when the TEL relay (Tractive Effort Limit Relay ) normally open contacts #1 are open, as shown, the DIO-3 module TEL input channel (CH 13) is off. If the logic computer turns on the DIO-3 module TEL output channel (CH 7), current flows from the +64/74 V source through the TEL coil and through DIO-3 output channel CH 7 to the +64/74V return. TEL therefore picks up. When TEL picks up, its contacts #1 close, completing the circuit to the DIO-3 module TEL input channel to the 64/74 V return.


0

ELECTRICAL REFERENCE DESIGNATIONS ABFR - - - - - - - - - - - Air Brake Alarm Relay ABASR - - - - - - - - - - Air Brake Alarm Silence Relay ADA - - - - - - - - - - - Analog to Digital Analog Module AG FLD- - - - - - - - - - Auxiliary Generator Field ALARM- - - - - - - - - - Alarm Bell ALT - - - - - - - - - - - - Companion Alternator AMM BC - - - - - - - - - Ammeter Battery Charging AMBTMP

- - - - - - - - Ambient Air Temperature Probe

AMM TE - - - - - - - - - Braking/ Tractive Effort Meter ASC- - - - - - - - - - - - Analog Signal Conditioner Module ASG- - - - - - - - - - - - Traction Computer AR - - - - - - - - - - - - Alarm Relay AUX GEN- - - - - - - - - Auxiliary Generator AV - - - - - - - - - - - - Governor “A” Solenoid B1, B2, B3, B4- - - - - - - Brake Grid Contactors BATT - - - - - - - - - - - Storage Battery (64 VDC) BATT SW - - - - - - - - - Battery Switch BC ASM - - - - - - - - - Battery Charging Assembly BCU - - - - - - - - - - - Braking Control Unit (Knorr) BKBL - - - - - - - - - - - Brake Blower Motor BKS - - - - - - - - - - - Brake Handle Switch BTA - - - - - - - - - - - Battery Box Temperature Sensor BV - - - - - - - - - - - - Governor “B” Solenoid BWR - - - - - - - - - - - Brake Warning Relay CA__ - - - - - - - - - - - Capacitor CB- - - - - - - - - - - - - Circuit Breaker CCU - - - - - - - - - - - - Cab Control Unit (Knorr Brake Valve) CMPSYN - - - - - - - - - Compressor Synchronization Relay GENERAL INFORMATION 0-15

COM - - - - - - - - - - - - EM2000/TCC’s/Knorr Communication Interface CPU - - - - - - - - - - - - Central Processing Unit CR_ - - - - - - - - - - - - Rectifier CR-AG - - - - - - - - - - Auxiliary Generator Rectifier CR-BC- - - - - - - - - - - Battery Charging Rectifier CRU - - - - - - - - - - - - Computer/Relay Unit CR-GTO - - - - - - - - - - GTO Power Supply Rectifier CT - - - - - - - - - - - - - Current Transformers CV - - - - - - - - - - - - - Governor “C” Solenoid DBGR - - - - - - - - - - - Dynamic Brake Ground Relay DCL - - - - - - - - - - - - DC Link Motorized Switchgear DCR - - - - - - - - - - - - Air Dryer Control Relay DRC - - - - - - - - - - - - Diode-Rectifier-Capacitor DV - - - - - - - - - - - - - Governor “D” Solenoid DVR - - - - - - - - - - - - Digital Voltage Regulator Module EFCO - - - - - - - - - - - Emergency Fuel Cut Off/Engine Stop Switch EFS - - - - - - - - - - - - Engine Filter Switch ENG PU - - - - - - - - - - Engine Speed Magnetic Pick Up ESR - - - - - - - - - - - - Emergency Sanding Relay ETP_ - - - - - - - - - - - Engine Temperature Probe FCD - - - - - - - - - - - - Firing Control Driver Module FCF - - - - - - - - - - - - Firing Control Feedback Module FCF_ - - - - - - - - - - - Fan Contactor, Fast Speed FCS_ - - - - - - - - - - - - Fan Contactor Slow Speed FLSHR - - - - - - - - - - - Flasher Relay FP MTR - - - - - - - - - - Fuel Pump (Motor) FP/ES - - - - - - - - - - - Fuel Pump/ Engine Start Switch FPR - - - - - - - - - - - - Fuel Pump Relay FVS - - - - - - - - - - - - Filter Vacuum Switch 0-16 GT46MAC LOCOMOTIVE SERVICE MANUAL

0

GEN AUX - - - - - - - - - Auxiliary Alternator/Generator GEN MAIN - - - - - - - - Main Alternator /Generator GFC - - - - - - - - - - - - Generator Field Contactor GFD

- - - - - - - - - - - Generator Field Decay Contactor

GOV - - - - - - - - - - - Engine Governor GR - - - - - - - - - - - - Ground Relay GRT- - - - - - - - - - - - Ground Relay Transductor GTOPS1- - - - - - - - - - Gate Turn-Off Thyristor Power Supply1 GTOPS2- - - - - - - - - - Gate Turn-Off Thyristor Power Supply 2 IB1,IB2 - - - - - - - - - - Grid Current Sensor (Hall Effect) IBKBL - - - - - - - - - - Grid Blower Current Sensor (Hall Effect) IMGF - - - - - - - - - - - Main Generator Field Current Sensor (Hall Effect) IS - - - - - - - - - - - - - Isolation Switch ITCC__ - - - - - - - - - - Inverter Current Sensor (Hall Effects) LR - - - - - - - - - - - - Load Regulator L456 - - - - - - - - - - - DC Link Stabilizer Inductor LOS - - - - - - - - - - - - Low Oil Switch (Governor) LWS - - - - - - - - - - - Low Water Level Switch MCB - - - - - - - - - - - Module Circuit Breaker Relay MRPT

- - - - - - - - - - Main Reservoir Pressure Transducer

MV - - - - - - - - - - - - Magnet Valve MV-EBT- - - - - - - - - - Magnet Valve Electronic Blow Down Timer MV-Horn CE - - - - - - - Magnet Valve-Air Horn Cab End MV-Horn HE - - - - - - - Magnet Valve-Air Horn Hood End MV-CC - - - - - - - - - - Compressor Control Magnet Valve MV-RB - - - - - - - - - - Radar Blower Magnet Valve MV-SH - - - - - - - - - - Shutter Control Magnet Valve MV1SF - - - - - - - - - - Magnet Valve Truck 1 -Sanders, Forward MV1SR - - - - - - - - - - Magnet Valve Truck 1 -Sanders Reverse GENERAL INFORMATION 0-17

MV2SF - - - - - - - - - - Magnet Valve Truck 2 -Sanders, Reverse MV2SR - - - - - - - - - - Magnet Valve Truck 2 -Sanders, Reverse ORS - - - - - - - - - - - - Governor Overriding Solenoid NO DBCO - - - - - - - - - Dynamic Braking Cut Out Switch PCR - - - - - - - - - - - - Pneumatic Control Relay PCS - - - - - - - - - - - - Pneumatic Control Switch PCU - - - - - - - - - - - - Pneumatic Control Unit (Knorr) PDP - - - - - - - - - - - - Power Distribution Panels PD - - - - - - - - - - - - - Power Distribution Plugs (74 VDC) RADAR - - - - - - - - - - Super Series Radar RBL MTR___ - - - - - - - Radiator Blower Motor RDR TST - - - - - - - - - Radar Test Relay RE__ - - - - - - - - - - - - Resistor RE-BC - - - - - - - - - - - Battery Charging Resistor REC - - - - - - - - - - - - Receptacle RE-DB - - - - - - - - - - - Dynamic Brake Rheostat Auxiliary Resistors RE-GRID 1-8 - - - - - - - Dynamic Braking Resistor Grid (1 thru 8) RE-VDCL - - - - - - - - - DC Link Voltage Feedback Resistor REVMG - - - - - - - - - - Main Generator Feedback Resistor RHS-F-R- - - - - - - - - - Reverser Handle Switches Forward - Reverse RHS - - - - - - - - - - - - Remote Headlights Control Switch RH - - - - - - - - - - - - - Rheostat SCR - - - - - - - - - - - - Silicon Control Rectifier (Generator Excitation) SDR - - - - - - - - - - - - Shut Down Relay SM1& 2 - - - - - - - - - - Starting Motor SPR1-2- - - - - - - - - - - SIBAS 16 Traction Con. Comp. Power Relays ST

- - - - - - - - - - - - Starting Contactor

STA - - - - - - - - - - - - Starting Auxiliary Contactor T__ - - - - - - - - - - - - Transformer 0-18 GT46MAC LOCOMOTIVE SERVICE MANUAL

0

TB - - - - - - - - - - - - - Terminal Board TCC_ - - - - - - - - - - - Traction Control Converter TCC1SS - - - - - - - - - - TCC1 Blower Slow Speed Contactor TCC2SS - - - - - - - - - - TCC2 Blower Slow Speed Contactor TEL - - - - - - - - - - - - Tractive Effort Limit Relay THS_ - - - - - - - - - - - Throttle Handle Switch TLP MTR - - - - - - - - - Turbo Lube Pump Motor TLPR - - - - - - - - - - - Turbo Lube Pump Relay TM AIR - - - - - - - - - - Traction Motor Cooling Air Temperature Probe TM-1to 6 - - - - - - - - - Traction Motor (1-6) TMS- - - - - - - - - - - - Traction Motor Stator Temperature Sensor TM__SPPU - - - - - - - - Traction Motor Armature Speed sensor TURBO PU - - - - - - - - Turbo Speed Magnetic Pickup VCU - - - - - - - - - - - - Voltage Conditioning Unit (Knorr) VDCL - - - - - - - - - - - DC Link Voltage Sensor VPC - - - - - - - - - - - - SIBAS Voltage Protection Contactor WH SLP - - - - - - - - - - Wheel Slip Light WL - - - - - - - - - - - - Wheel Slip Relay


INTRODUCTION TO KNORR AIR BRAKE SYSTEM This locomotive model is equipped with a Knorr CCB microprocessor (computer) controlled air brake system that has been incorporated into the EM2000 system. The display of pressures uses traditional discreet analog gauges. The Knorr CCB is a computer based electro-pneumatic system providing control of air brakes on locomotives and cars coupled in trains. An overview of this system is provided in the block diagram of Figure 0-5. The overall purpose of using a computer (microprocessor) to control the air brake system is to eliminate as many of the discrete electrical and pneumatic devices as possible thus reducing periodic maintenance and simplifying troubleshooting. The processor controlled air brake is designed to work like a standard 26L mechanical brake system. Because of the reduced components required it allows greater reliability while reducing maintenance cost.

Figure 0-6 Computer Controlled Braking System Overview The function of pneumatic relays and valves is replaced by a Pneumatic Control Unit (PCU) mounted in the cab sub-base. The PCU is a fabricated structure made up of a panel for mounting of pneumatic devices formerly at scattered locations on the locomotive. The PCU is controlled by the CCB air brake computer - it can connect its inputs together in different ways and provides an interface for electrical and pneumatic devices. A Cab Control Unit, located on the top right side of the lower console, houses controls for the automatic and independent brake systems.


0

Figure 0-7 Cab Control Unit Block Diagram

AIR BRAKE EQUIPMENT A Cab Control Unit (brake valve) is located on the top of the lower console on both sides of the cab and most brake equipment is mounted on a laminated panel behind an access panel on the front of the locomotive. The electrical Cab Control Unit (brake valve) has two handles -

1. Automatic Brake Valve function 2. Independent Brake Valve function IMPORTANT The following air brake controls on this Locomotive are implemented with discrete air brake components and are also communicated to the EM2000 system. Refer to Figure 6-14 on page 6-26 for set up of these functions.

1. REGULATING VALVE (FEED VALVE) 2. MULTIPLE UNIT VALVE 3. CUT-OFF PILOT VALVE. These devices have been replaced with electrically (computer) controlled equipment. The device that replaces the pneumatic brake valve is described as follows.


The automatic and independent brake system combines two controls in a single housing, located on the top of the console. Handles are operated in a forward-backward motion, the brakes being released at the backward (towards the operator) position. Operating positions are detented for positive location.

Figure 0-8 Cab Control Unit (replaces brake valve)

INTRODUCTION TO EM2000 LOCOMOTIVE DISPLAY The EM2000 locomotive computer display can be accessed by selecting LOCO DATA from the Main Menu on the display. The EM2000 display panel is made up of a 6 line, 40 column display that is operated with push-button keys. This panel, combined with the locomotive control computer, is referred to as the Display Diagnostic System (DDS) because it can provide locomotive operating, maintenance, and troubleshooting data. The Display Diagnostic System was designed to be “user friendly” for a locomotive operator with little or no computer experience. Do not let the detailed discussion which follows cause undue concern about the complexity of this system - actual DDS use is much easier than the technical details might imply. The Display Diagnostic System is an interactive device that provides an interface between the control computer and the locomotive operator or maintenance person. The user observes the display screen and can input to the computer through the keypad. The computer directs operator input by providing “messages” on the screen. These messages indicate locomotive control and maintenance functions.


0

KEYPAD The characterization of the EM2000 uses one on-screen row of 4 spaces which are related to the 4 hard keys under the screen. The following list defines the purpose of each key on the screen keypad area as they are used for the EM2000 display. –F1, F2, F3, F4 are function keys. The term “function” key is used to specify keys that are not defined in the same way for every screen. The purpose of these keys is to provide greater flexibility in menu selection. On any given screen the function keys represent an instruction to the control computer such as, reset a fault, cut out an inverter, request more information about other stored data, etc. The function keys are located under the actual display screen with pointer lines showing which key affects that function. The bottom line on the screen provides the definition for the function keys that are active on that screen. There are 4 function (globally undefined) keys available on the display and 12 dedicated keys. These dedicated keys are defined as follows –Cursor Arrow Keys are used to move the on-screen cursor to a different postion. NOTE The “cursor” on an EM2000 display screen is actually a highlighted box the background behind the area of the selection is reverse colored black/white. –On/Off

turns on or off the display screen

–M MENU

returns screen to main menu in one keystroke.

–CREW

returns screen to crew message function in one keystroke.

–HELP

provides information about the current screen and explains available options.

–SELECT

Select the item highlighted on the screen

–HE POWER

Not used on GT46MAC Locomotive

–SLOW SPEED Not used on GT46MAC Locomotive –BRIGHT/DIM

Controls Screen Brilliance


BASIC SCREENS When power is first applied to the display (the battery knife switch is closed and the "Computer Control " circuit breaker is closed), the system will do the necessary board level checks on the display. Once this task is completed, a search for archived faults in a temporary fault storage area called the "annunciator" will be conducted. If there are faults stored in the annunciator, the display screen will appear as follows:

f43254

Figure 0-9 Maintenance Information Stored The annunciator is intended to hold recent faults, and it is prudent to clear out the annunciator of any faults before the locomotive is dispatched on a train. In this manner, if any faults do occur while the locomotive is on a current run, the next maintenance area will know that there was a problem during the last run because of the "Maintenance Information Stored" message. We will cover resetting the annunciator and other in-depth use of the display later the course. If there are no faults stored in the annunciator, the display will then search for "Crew Messages", which are messages displayed on the screen with the intent of informing the operating crew of an unusual condition on the locomotive (not necessarily a fault condition). An example of this type of message is shown below:


0

F43255

Figure 0-10 Crew Message #2 of 3

NOTE CREW MESSAGES actually display normal operating conditions as well as problems that occur on the locomotive, such as: • engine speedup for low water temperature • locomotive is not properly set up for the current required mode of operation • power is limited • some piece of equipment or system has failed and a protective function is active. If there are no crew messages to display, the display screen then automatically goes to the "Main Menu", which is shown below:


F43256

Figure 0-11 EM2000 Main Menu Display Other selections off of the main menu can be made by using the four cursor keys in the center of the keypad. Once the desired selection has been highlighted, use the F3 key to SELECT. Once in the desired screen, use the F4 key (except in the Fault Archive) to EXIT and return to the previous screen to make another selection. •Unit Information •Unit number •Software identification number •Ambient air temperature •Barometric pressure •Date •Time

TRACTION CUTOUT This selection replaces the "Traction Motor Cutout" switch on previous locomotives. You must now initiate traction motor cutout or truck disable from this screen.


0

SELF TESTS Self load Excitation Load Regulator Wheel Slip Contactors/Relays Cooling Fans Radar Meter Test DCL Shorting Test

FAULT ARCHIVE Display archive faults Send archive faults to RS-232 port Clear the annunciator

RUNNING TOTALS Show running totals on display Transfer data to RS-232 port Start/Stop trip monitor

MAINTENANCE Air Test Setup TE Limiting

ENGLISH/METRIC Allows the user to toggle between both measurement units. The display retains the last selected units until toggled back.

LOCKED WHEEL DETECTION Disable/Enable Locked Wheel Detection


DATA METERS The purpose of the data meter is to give the user information about the operation of the locomotive and computer in real-time fashion. To make signal selection easy, there are a number of predefined meters. There is also the ability for the user to select individual signals for a personalized meter screen. See the following page for a listing of the available meters.Listing of Available Meters

•Program meter •Dynamic Brake •Starting System •Digital I/O •Power Data •Creep Control •Cooling system All maintenance and operating personnel are encouraged to gain experience on the display system in hopes of working more efficiently with the GT46MAC locomotives and the EM2000. The easiest way to get experience with the system is to "learn by doing". The locomotive cannot be damaged by perusing the screens, however, the novice should first go through the screens with someone knowledgeable about locomotive operation, as selections such as "Load Test" can be made that will set the locomotive into a power generating mode. Also, since pick-up and dropout of a variety of contactors (as well as other duties) can be executed through interface with the display, safe work rules should prohibit casual "browsing" through the display when the unit is "Blue Flagged" as someone may be working in a vulnerable position.


0

INTRODUCTION TO FLANGE LUBE SYSTEM Rail lubrication systems are designed to reduce friction between the locomotive’s wheel flanges and the rails by applying a controlled amount of lubricant to the “throat” area of selected wheels during locomotive operation under conditions appropriate for its use. The GT46MAC units #11001 to 11013 are equipped with a TSM rail lubrication system entirely controlled by the locomotive computer EM2000. This system uses a grease/oil type lubricant - propelled, and atomized by the locomotive’s compressed air system.

SYSTEM OPERATION The TSM rail lubrication system consists of 3 major components 1. A reservoir (tank), located in the rear (long hood) end of the locomotive, contains the lubricant supply. The TSM system utilizes a lubricant reservoir which is pressurized by air from the main reservoir. 2.Lubricant spray nozzles (2) are mounted adjacent to (and aimed at) the flange “throat” area of the appropriate wheels. Locomotive compressed air is used to operate (trigger) the nozzles on the systems, and is used as a lubricant propellant (atomizer) on the TSM system. 3. Metering valves and solenoid(s) are used on the systems to control the flow of air and lubricant to the nozzles upon receiving electrical signals from the EM2000. The rail lubrication system is now being controlled by the EM2000, thus eliminating the need and cost of a TSM system controller box. The electrical components of the system are MV-PUMP, MV N0ZF and MV N0ZR. The computer controls these magnet valve using DIO3 output channels 11, 12 and 13. EM2000 will turn on the appropriate output channels RLN0Z 1 (Rail Nozzle Forward) or RLN0Z2 (Rail Nozzle Reverse) every 0.2 seconds every 122 meters (400 feet) if locomotive speed is above 8.1Km/h (5 M.p.h.) and there is no emergency brake application or sand application. To pressurize the lubricant, the computer turns on the output channel (RL PUMP) every10 nozzle spray “shots” so that main reservoir air pressurizes the lubricant. A system self test can be performed using EM2000 display - Select SELF-TEST on the main menu, then flange lube self-test. Follow the instruction displays.


ALERTER (VIGILANCE) SYSTEM

The vigilance function on the GT46MAC locomotive is performed by EM2000. When the locomotive brakes are released, the computer requests an acknowledgment from the locomotive operator from time to time. The acknowledgment request is never more frequent than once per 60 seconds. If the acknowledgment request is not answered, the locomotive computer initiates a penalty brake application. The acknowledgment requests consists of: 1.Alerter lights flashing for 17 seconds, then 2.ALERTER ALARM sounds for 17 seconds (Lights continue flashing) Pressing either alerter RESET button while the alerter lights are flashing or the ALERTER ALARM is sounding resets the acknowledgment request timing cycle. Using the automatic brake handle to moderately reduce brake pipe pressure also resets the timing cycle. In addition, movement of the throttle handle, independent brake handle, or dynamic brake handle will also reset the timing cycle, as will pressing the HORN or SAND button. If the alerter system request is not acknowledged while the alerter light is flashing or the ALERTER ALARM is sounding, the alarm stops sounding and a penalty brake application occurs. The penalty brake application must be reset before normal train operation can continue.

NOTE

Use of alerter equipment must be in accordance with Railway rules and operating practices The alerter indicator light mounts on the control console instrument panel, below the indicator light panel. The orange alerter RESET push-button mounts on the control console desktop surface, in front of the air brake controller. The audible ALERTER ALARM mounts on the No. 1 electrical control cabinet engine control panel. EM2000 uses : –DIO-3 input channel 9 (ALTRST)to monitor the state of the alerter reset buttons (console #1 and #2). –DIO-3 Output channel 1 (ALT LT) to control the alerter lights (console #1 and #2). –DIO-3-Output channel 3 (ALTBEL) to control the alerter alarm bell.


0

SAFETY PRECAUTIONS FOR GT46MAC LOCOMOTIVES INTRODUCTION The GT46MAC is a new locomotive model that has some equipment not found on freight locomotives with DC traction motors. Safety precautions specific to a GT46MAC must be followed before inspecting the equipment. This section provides general safety information and precautions that are necessary before maintenance can be performed on the locomotive.

WARNING

All local safety rules should be observed. This document is designed for use by various customers. It should be used in conjunction with customer specific safety rules.

The output of the TA17-6 main generator is the DC link voltage. A large capacitor rack is located within each of the traction inverters TCC1 and TCC2 to filter main generator voltage before it goes to the traction inverters. These capacitors operate at the DC link voltage between 600 and 3000 VDC. When the locomotive is shut down these capacitors could retain this high voltage causing a possible safety hazard to operating and maintenance personnel. A procedure has been developed to discharge this high voltage into the dynamic brake grids to prevent the possibility of injury.

WARNING

The DC link voltage is present on all equipment connected to the output of the main generator. This includes main generator output terminals and cabling connections, TCC cabinets, Crowbar Inverter Protection Resistors (IPR), DCL switchgear, DCL Reactor and brake grids.

THE LOCOMOTIVE OPERATOR SHALL NOT ACCESS ANY DEVICES WITHIN THE HIGH VOLTAGE CABINET, DUE TO RESIDUAL HIGH VOLTAGE. ACCESS WITHIN THE HIGH VOLTAGE CABINET (HVC) IS LIMITED TO MAINTENANCE INDIVIDUALS THAT ARE KNOWLEDGEABLE OF THE GT46MAC DISCHARGE PROCEDURE. This restriction does not apply to the engine control panel, circuit breaker panel, circuit breaker compartment, and the fuse and switch panel, which may be accessed during normal operation. A drawing on the following page shows the location of the 3 panels and one compartment, which may be accessed by the locomotive operator.


Figure 0-12 High Voltage Cabinet Upper Half (showing panels accessed by operator)

Figure 0-13 ECC1’s Circuit Breaker Panel


0

F42002

Figure 0-14 Circuit Breaker and Voltage Test Panel

F43257

Figure 0-15 Fuse and Battery Compartment Switch


F42003

Figure 0-16 Engine Control Panel The DC link is discharged automatically by the locomotive operator or maintenance personnel in the normal course of shutting down the unit. Upon engine shutdown, excitation to the main generator is disabled and main generator output voltage will approach zero. In the event of a system failure, even after the engine is stopped, capacitors and phase modules could be at operating voltage. Moving the Isolation switch to ISOLATE causes the DC link voltage to be automatically (by EM2000) connected across the dynamic brake grids causing the DC link energy to be dissipated through the grids. It takes approximately 1 second for the DC link to be discharged in this manner.

WARNING

Even after the automatic shut down, i.e. in case of failure, TCC cabinet components such as DC Link capacitors, snubber capacitors, grounding capacitors, and phase modules may still be charged at hazardous voltage level. Therefore, additional activities have to take place in the TCC in order to make the AC system safe for inspection and maintenance. If a cut out bogie (inverter) cannot be cut in because of a fault in the computer control system, the DC link shorting test cannot be completed. Follow the GT46MAC discharge procedure.


0

SECTION 1. ENGINE STARTING AND STOPPING INTRODUCTION The locomotive is equipped with two 64VDC electric motors for starting the diesel engine. When the starting motors operate, their pinions engage the engine flywheel ring gear, and the starting motors crank the diesel engine. Before starting, the diesel engine must be primed with fuel by operating the fuel pump. The fuel pump also operates during engine cranking (starting) and while the engine is running.

STARTING EQUIPMENT STARTING FUSE Battery current flows through a 800 amp rated fuse only during the diesel engine starting process.The fuse should be in good condition and should always be left in place, even though it has no effect on locomotive operation except during engine starting. The fuse may be defective if the starting motors will not crank the engine when the battery knife switch is closed and a starting attempt is made (i.e. FP/ES switch held in ENGINE START position. In that event, EM2000 will display a crew message labeled “NO START - START FUSE IS OPEN OR MISSING”. CAUTION This locomotive is equipped with a 800 amp starting fuse. When replacing the fuse, observe rating marked on the panel. Do not use an incorrectly rated fuse.

FUEL PRIME/ENGINE START SWITCH (FP/ES) The Fuel Prime/Engine Start switch (FP/ES) is the control device used to initiate engine starting on export model units. When the fuel prime/engine start switch is held in FUEL PRIME position and the proper switches and breakers are closed, the fuel pump will operate. This switch has three positions and is used to provide three circuit functions •

FUEL PRIME Position

Holding the FP/ES switch in the PRIME position tells the computer to start the fuel pump motor and pressurize the fuel system for starting. •

ENGINE START Position

Holding the FP/ES switch in the START position provides a start logic signal to the control computer, which in turn picks up the STA contactor. Pickup of STA causes pick up of starting contactor ST which powers the engine starting motors. •

OFF POSITION (not used by EM2000)

ENGINE STARTING AND STOPPING 1-1

FP/ES SWITCH LOGIC To accomplish the 3 functions listed above, the FP/ES switch must be a multi function switch. Below is the logic chart for OFF, START and PRIME positions and a brief explanation of interlock function.

USE f43258

Figure 1-1 Fuel pump engine prime/start logic chart •

Interlock 1-2 closes in PRIME and START tells the computer to start the fuel pump motor

•

Interlock 3-4 & 5-6 closes in OFF position. NOT USED

•

Interlock 7-8 closes in START position, the computer receives a starting request

•

Interlock 9-10 closes in START position to allow pickup of the STA contactor by the computer

•

Interlock 11-12 closes in START position. NOT USED

ENGINE PRIME CIRCUITS (see fig 1-2)

1-2

•

Battery switch and local control breaker closed.

•

Hold FP/ES switch in prime position. Refer to Figure 1-2.

•

Interlock 1-2 close provide a feed to the computer DIO-2(IN)(CH7)(PRIME)

•

The computer activates output channel 2(OUT)(CH11)(FPRLY) which picks up the FPR relay coil

•

EFCO interlock #2 must be closed.

GT46MAC Locomotive Service Manual

DIO-

0

NOTE The EFCO relay is picked up as soon as the LOCAL CONTROL breaker is closed and the SDR (shut down relay) is not picked up and none of the EFCO switches are pushed. •

When the FPR picks up, its #1 and #2 contacts close to start the fuel pump. The pump will run as long as the FP/ES switch is held in prime.

F43259

Figure 1-2 GT46MAC Engine Prime/Engine Start Circuit. When the FP/ES switch is placed in the start position and the above conditions are met: 1. Interlock 1-2 close to provide a feed to the computer’s DIO-2(IN)(CH7)(PRIME). As in the prime sequence the FPR picks up the fuel pump. 2. Interlocks 7-8 close to provide a feed to DIO-1(IN)(CH1)(START). This provides the computer with the starting input signal 3. Interlocks 9-10 close to complete the circuit to STA coil and DIO1(OUT)(CH16)(STA). This circuit picks up the STA contactor, which in turn picks up the ST contactor to start the diesel engine. ENGINE STARTING AND STOPPING 1-3

ENGINE START CIRCUIT

F43260

Figure 1-3 Engine Start Circuit. The engine start sequence will be allowed to commence only if the following conditions are met: Unit is not already running The computer will not pick up STA if it detects that engine speed is greater than 55 RPM or that companion alternator output voltage is greater than 25 V. To detect engine speed, the computer monitors the frequency of the signal from a magnetic pickup mounted near the engine flywheel. This pickup transmits a pulse each time a flywheel gear tooth moves past. To detect companion alternator voltage, the computer uses the information provided by the panel

mounted module FCF, (Firing Control Feedback) which is connected to the output of the companion alternator through the AC control breaker. Isolation switch is in the START/STOP/ISOLATE position Computer detects this by means of its DIO-2(IN)(CH1)(ISOLATE) input channel. Turbo lube pump is running Computer detects this by means of the DIO-1(IN)(CH24)(TPLR) input channel . No starting abutment Computer detects this condition when it does not receive the feed from starting contactor (ST) auxiliary contacts within 0.3 seconds after starting is initiated. (Indicates that something was preventing a starting plunger from reaching its fully-drawn-in position.) Starting motors SM1 and SM2 are each equipped with a solenoid assembly. Each solenoid assembly has a pickup coil (PU), a hold-in coil (HOLD), and a set of contacts (SM). The PU coil resistance is relatively low; the HOLD coil has many turns of fine wire, and has much greater resistance. 1-4


0 When the computer picks up contactor STA, the FR (STA) and BK (STA) contacts close, supplying battery current through the starting motor solenoid PU coils and the starting motors themselves. Energizing a PU coil draws in its plunger, causing the bottom arm of the connecting linkage to push the motor clutch so that it engages the motor pinion gear with the engine flywheel ring gear. As the solenoid plunger nears the end of its travel (near fully drawn in), it closes the solenoid SM contacts. When both solenoid SM contacts are closed, they enable battery power to pick up the main starting contactor ST, through closed STA contacts. The FR (ST) and BK (ST) contacts then close to connect the starting motors (in parallel) across the batteries though the battery switch and the START fuse, and the starting motors begin cranking the diesel engine. When the ST contacts close, the PU solenoid coils are virtually shorted out because the STA contacts are also closed. Therefore, current stops flowing through the PU coils. However, sufficient current flows through the HOLD coils to keep the solenoid plungers drawn in. After the engine has started and the FP/ES switch is released, the computer drops out STA. This causes ST to drop out. With STA and ST both dropped out, all power to the starting motors is cut off, so they stop cranking, and their pinions withdraw from the ring gear.

EFCO SWITCH

F43261

Figure 1-4 GT46MAC EFCO Circuit The Emergency Fuel Cut Off Push-button Switch EFCO is used to drop out the EFCO relay which drops out fuel pump relay FPR and shuts down the engine. The GT46MAC is equipped with 3 EFCO switches. One is on the Engine Control Panel (electrical cabinet) and one is on each side of the locomotive near the fuel filler orifices.

MU ENG STOP SWITCH & SDR RELAY The MU ENG STOP (Multiple Unit Engine Stop) push-button switch, on the #2 control console, is used to activate the Shutdown Relay SDR. Pick up of SDR shuts down the diesel engines of all MU connected locomotive units in a consist.


STARTING PROCEDURES FOR GT46MAC DIESEL ENGINES Perform the following Prestart Inspections before attempting to start the diesel engine.

PRESTART INSPECTIONS Open the doors along the sides of the locomotive long hood to gain access to engineroom equipment. Refer to previous chapter, for equipment location. •

Check air compressor for proper lube oil supply. Add oil, if necessary. Refer to Section 6 for compressor lube oil recommendations.

•

Check level in water level sight gauge; it should be near the FULL (ENGINE DEAD) mark. If water level is low, refer to Section 4 in this manual.

•

Make sure that overspeed trip (OST) mechanism is set, Figure 1-6, page 1-8.

•

Check that the governor low oil pressure trip plunger is set, and that oil is visible in the governor sight glass.

•

Check to be certain that the crankcase pressure and low water pressure detector reset buttons are set (pressed in). (See Figure 1-7.) If either button protrudes, press and hold button for five (5) seconds immediately after engine starts.

•

Make sure that engine top deck, air box, and oil pan inspection covers are in place and are securely closed.

•

Make sure that oil level gauge (dipstick), located on side of engine oil pan, is coated with lube oil.

NOTE A properly filled lube oil system coats the oil gauge above the FULL mark when the engine is stopped. To obtain an accurate check, recheck level when engine is idling and at normal operating temperature. •

1-6

Perform Prelubrication procedures described in “PRELUBRICATION,” on page 1-9, before attempting to start a new engine, or an engine that has been overhauled, or an engine that has been shut down for more than 48 hours.


0

F-EN42790

Figure 1-5 GT46MAC Engineroom Equipment Rack


F29233

Figure 1-6 Govenor Trip Plunger and Engine OST Reset Lever.

F-ES37807

Figure 1-7 Low Water and Crankcase Pressure Detector

1-8


0

PRELUBRICATION It is necessary and important to prelubricate new engines, engines that have been overhauled, and engines that have been inoperative for more than 48 hours. Prelubrication alleviates loading of unlubricated engine parts during the interval when the lube oil pump is filling the passages with oil. It also offers protection by giving visual evidence that oil distribution in the engine is satisfactory. Perform prelubrication as follows: 1. Remove the pipe plug at the main lube oil pump discharge elbow, and connect an external source of clean, warm oil at the discharge elbow. Prelube engine at a minimum of 69 kPa (10 psi) for a period of not less than three and not more than five minutes (approximately 57 liters/min. [15 gpm] using a 1.1 to 1.5 kW [1-1/2 to 2 HP] motor). 2. While oil pressure is being applied, open the cylinder test valves and bar the engine over one complete revolution. Check all bearings at the crankshaft, camshafts, rocker arms, and at the rear gear train for oil flow. Also check for restrictions and excessive oil flow. Check for fluid discharge at the cylinder test valves. If fluid discharge is observed from any cylinder test valve, find the cause and make the necessary repairs. 3. On new or overhauled engines, remove the pipe plug at the piston cooling oil pump discharge elbow and connect the external oil source at that opening. Check for unrestricted oil flow at each piston cooling tube. 4. Disconnect the external oil source and replace the pipe plugs at the pump discharge elbows. Close the cylinder test valves. 5. Raise the top deck covers and pour a liberal quantity of oil over the mechanism above each cylinder. 6. Check oil level in strainer housing and, if required, add oil to strainer housing until it overflows into the oil pan. 7. Replace and securely close all handhole covers and engine top deck covers. NOTE When an engine is replaced due to mechanical breakdown, it is important that the entire oil system, such as oil coolers, filters, and strainers, be thoroughly cleaned before a replacement engine or the reconditioned engine is put in service. A recurrence of trouble may be experienced in the clean engine if other system components have been neglected. In some cases, engines have been removed from service and stored in the “as-is” condition by draining the oil and applying anti-rust compound. When these engines are returned to service, care must be taken to see that any loose deposits are flushed out before adding a new oil charge. The entire engine should be sprayed with fuel to break up any sludge deposits, and then drained, being careful that the drains are not plugged. Fuel should not be sprayed directly on the valve mechanism or bearings, as lubrication will be removed or dirt forced into these areas. The surfaces should then be wiped dry before new oil is added to the engine.


ENGINE STARTING PROCEDURE After the preceding inspections have been completed, the diesel engine may be started. CAUTION Perform the Prelubrication procedures described in “PRELUBRICATION” on Page 1-12 before attempting to start a new engine, an engine that has been overhauled, or an engine that has been shut down for more than 48 hours. If engine temperature is below l0°C (50°F), engine should be preheated prior to any starting attempts. 1. Check engine oil level in strainer housing and, if required, add oil to strainer housing until it overflows into the oil pan. 2. Open cylinder test valves and bar over the engine at least one revolution. Observe for leakage from test valves. Close the test valves. NOTE It is highly recommended that the engine be barred over one complete revolution with the cylinder test valves open before starting. If any fluid discharge is observed from any cylinder, find the cause and make the necessary repairs. This practice should apply particularly to engines that are approaching a scheduled overhaul after several years of service or have had a history of water or fuel leaks. 3. At the fuse and switch panel located outside of the locomotive (left side), verify that the battery knife switch (BATT SW) is closed. Check that the starting fuse is in good condition and has proper rating. At the circuit breaker panel on the electrical cabinet #1 verify that the auxiliary generator (AUX GEN) circuit breaker is closed. CAUTION This unit model is equipped with a 800 ampere starting fuse. Observe markings on panels to avoid interchange of incorrectly rated fuses. 4. On the electrical cabinet at the No. 1 circuit breaker panel and No. 2 circuit breaker and test panel, close all the breakers that are located in the black panel areas. (Breaker is closed when its lever is UP.) At the No. 1 circuit breaker panel, check position of the ground relay cutout switch. This switch is normally kept closed (lever UP) to enable normal locomotive operation. When this switch is open (lever down), as set during certain shop maintenance inspections or procedures, the ground fault detection system is disabled and the locomotive computer prevents both loading (main generator excitation) and throttle response by the diesel engine (engine speed not affected by throttle handle). 5. At the engine control panel, set the isolation switch to the START/ STOP/ ISOLATE position. 6. At the #2 control console, set the generator field switch and engine run switch to the OFF (down) position. Set the control and fuel pump switch to the ON (up) position. 7. At the equipment rack, momentarily hold the fuel prime/engine start switch (FP/ES), Figure 1-9, Page 1-15, in the PRIME position to start the turbo lube oil pump. 1-10


0 8. Remove rear oil pan handhole cover and open top deck covers. Check turbo lube pump operation by observing lube oil flow at camshaft gear train. NOTE Observe camshaft bearings. If lube oil flows from camshaft bearings with turbo lube pump running and engine shut down, the turbo filter outlet check valve is defective. Refer to Engine Maintenance Manual.

CT42000

Figure 1-8 Typical Fuse and Switch Compartment.

9. Replace and securely close handhole covers and engine top deck covers. 10. Turn the fuel prime/ engine start switch (FP/ES) to the PRIME position and hold it there until fuel flows in the return fuel sight glass, Figure 1-10, page 1-13, clear and free of bubbles (normally 10-15 seconds).


Figure 1-9 Fuel Prime Engine Start Switch 11. Manually advance injector control lever about 1/3 its travel and turn the fuel prime/engine start switch (FP/ES) to ENGINE START position and hold the switch in this position until the engine fires and speed increases, but not for more than twenty (20) seconds. CAUTION Do not crank engine for more than twenty (20) seconds or “inch” engine with starting motors. After cranking, allow a minimum of two (2) minutes for starter motor cooling before attempting another engine start.

12. Release injector control lever (if advanced) when engine comes up to idle speed. Do NOT advance lever to increase speed until oil pressure is confirmed.

NOTE Engine water inlet temperature should be allowed to reach 49°C (120°F) at idle before moving the throttle handle above TH2 position.

1-12


0

F27505

Figure 1-10 Fuel Oil Sight Glasses 13. Check low water pressure detector reset button after engine starts. If tripped, press button to reset detector. The engine will shut down after a short time delay if the detector is not reset. NOTE If the detector is difficult to reset after engine starts, confirm oil pressure, position the injector control lever (layshaft) to increase engine speed for a short time, and then press the reset button. 14. With engine running at normal operating temperature check A. Coolant level is near the FULL (ENGINE RUNNING) mark on the water level sight glass. B. Lube oil level is near the FULL mark on oil level gauge (dipstick). C. Governor oil level. D. Compressor lube oil level.


STOPPING PROCEDURES FOR GT46MAC DIESEL ENGINES ENGINE STOPPING SYSTEM The normal way to shut down a diesel engine is to cause the engine governor to bring the fuel injectors to the “NO-FUEL” position. (Stopping the fuel pump without first bringing the injectors to the “NO-FUEL” position will also result in stopping the engine, but that method is not recommended.) There are several ways to cause the governor to bring the fuel injectors to the “NO-FUEL” position (to stop the engine), including operating the following switches: • • • •

EFCO/ STOP - the emergency fuel cutoff & engine stop push-button switch, mounted on the high voltage cabinet engine control panel in the cab; EFCO2 - the emergency fuel cutoff push-button switch mounted on the left side of the locomotive just above the fuel tank filler; EFCO3 - the emergency fuel cutoff push-button switch mounted on the right side of the locomotive just above the fuel tank filler; MU ENG STOP - the multiple unit engine stop/run switch mounted on the #2 console. (Pressing the STOP portion of this switch stops all engines in the consist.)

The governor will also bring the fuel injectors to the no-fuel position if any of the following conditions occur: • • • •

Engine lube oil pressure too low. Engine lube oil too hot. Engine cooling water pressure too low. Engine crankcase pressure too high.

MULTIPLE UNIT STOP Pressing the MU ENG STOP switch STOP push-button shuts down all the diesel engines in the consist. This is the result of the pick up of SDR. When SDR is picked up: • • • •

#2 contact opens to drop out emergency fuel cutoff relay EFCO, #4 contact opens to drop out generator field contactor GFC #3 contact opens to block the feeds to all the computer DIO module THS input channels and associated trainlines, #1 contact change position to continue to feed DIO module input channel THST56 and trainline 3T after the above feeds are blocked.

When EFCO is dropped out, its contact #1 closes to provide a direct return path to negative (the contact is installed in parallel with the output channel D VALVE) for the governor DV solenoid. When DV is energized it brings the injector rack to the “NO-FUEL” position.

1-14


0

NOTE Once depressed, the MU engine stop switch remains mechanically latched in until the run portion of the MU ENG stop switch is depressed. The diesel engine cannot be started when the switch is in STOP position. The crew message: MU SHUTDOWN REQUESTED appears on the display screen. Pressing the MU ENG STOP switch RUN push-button drops out SDR. The following results from SDR dropout: • • •

EFCO relay pickup is enabled. GFC contactor pickup is enabled. Normal control of feeds to DIO module THS input channels (by THS switches) is established.

EFCO SWITCH & MU ENG STOP/RUN SWITCH OPERATION Refer to Figure 1-4. When the STOP section of the MU ENG STOP switch is pressed, relay SDR picks up. (The MU ENG STOP switch contacts remain closed, energizing the SDR coil, until the RUN section of the switch is pressed.) When SDR picks up, the normally open No. 1 SDR contact close, providing a feed to trainline 3T (GOV-D) and to the computer DIO module THS 5 6 input channel. In addition, the normally closed No. 3 SDR contacts open, cutting off the feed to all the THS (throttle handle switches with the exception of - THS IDLE switch), which cuts off the feed to the corresponding computer DIO input channels and trainlines, as well as to the computer DIO module main generator field request input channel (GF REQ). In response, on all trainlined units, the computer drops out engine governor A, B, and C governor valves (speed-setting solenoids), and picks up the governor D valve; the governor therefore moves the injector control rack to the “NO-FUEL” position, stopping the engine. The computer also halts main generator excitation. The RUN section of the MU ENG STOP switch must be pressed to drop out relay SDR, restoring normal throttle switch inputs to the computer, to enable the engine to start and run. The normally closed switches EFCO/STOP, EFCO2, EFCO3, and the normally closed contact of SDR relay are connected in series with the EFCO relay coil. In normal operation, all the contacts in the series remain closed, and the EFCO relay stays picked up; note that, the computer DIO module NO EFCO input channel receives a feed that is not affected by the SDR contact. If any EFCO push-button is pressed, the EFCO relay drops out, and if the pushbutton is held pressed for at least 0.5 second, the computer detects that DIO module NO EFCO input channel input feed has been interrupted. If the MU ENG STOP switch, STOP section is operated, the SDR relay is energized which drops out the EFCO relay, without interrupting the feed to the NO EFCO input DIO channel.When the EFCO relay is de-energized, its No. 1 contact closes to provide a direct return path to negative for the governor DV solenoid which, when energized, shutdown the diesel engine.


When the computer senses that the feed to the NO EFCO input channel has been interrupted, it turns OFF the DIO module governor valve output channels AV, BV, CV, and ON the output channel D valve - causing the governor to stop the engine. In addition, the computer drops out the FPR relay, which stop the fuel pump.

NOTE As described in the preceding text, when an EFCO push-button is pressed, the EFCO relay immediately drops out, and, if the push-button is held depressed for at least 0.5 second, the computer reads that the NO EFCO computer DIO module input channel is interrupted. Either occurrence results in the governor bringing the injector rack to the no-fuel position, to stop the engine. Although unlikely, it is possible that someone will press an EFCO push-button when the computer is not operating; the loss of the NO EFCO computer input in these circumstances will have no effect on the governor or FPR relay. EFCO relay dropout will still cause the governor to shut down the engine and will still drop out fuel pump control relay FPR, but the EFCO pushbutton must be held down until the engine stops, or the engine will resume running when the push-button is released. (The reason that the engine will resume running is that the EFCO relay will pick up again when the push-button is released.)

Figure 1-11 Engine Fuel Cut Off Circuit.

1-16


0

STARTING MOTOR MAINTENANCE Maintenance should be performed as indicated in the Scheduled Maintenance Program, and may be performed when checks are being made on the motors. 1. Clean the brush holder and commutator area. Remove the most accessible brush inspection plugs from each motor assembly and direct a high pressure air hose at either opening to drive foreign matter out of the other opening. Use only dry air. Reinstall and secure inspection plugs. 2. Saturate the oil reservoirs and wicks at the bearing positions located at the front and rear of each motor assembly. Use only SAE No. 10 oil. 3. Manually press the pinion away from the ring gear to make the overrunning drive spline accessible for oiling. Use only SAE No. 10 oil.

SOLENOID REPLACEMENT PROCEDURE 1. Remove the starting motor guard cover and disconnect all wires to the solenoid after noting location of each wire connection. 2. Remove the solenoid from the motor by removing the four hex bolts. 3. Remove the front inspection cap in the plunger housing. 4. Check the number of threads exposed beyond the plunger stud adjustment nut inside the housing. If more than three threads are visible, hold the plunger to prevent its rotation, then back off the adjustment nut to a threethread exposure plus or minus half a thread. 5. Thoroughly wipe the plunger clean of any surface contaminants, with a clean shop rag. 6. Install new solenoid 1115567 in exact reverse order of removal procedure. CAUTION Three types of starting motor solenoids are presently in use. Part numbers 1115567 and 1115536 may be intermixed on a unit. However, part number 1115515 must be used only with another part number 1115515. 7. Reconnect all solenoid wires. Follow the above steps to renew the second motor solenoid. 8. Replace the guard cover and the ring gear cover. NOTE Refer to Engine Maintenance Manual for further starting motor maintenance procedures.


1-18


0

SECTION 2. FUEL SYSTEM INTRODUCTION A pictorial diagram of the fuel oil system is shown below. Fuel is drawn from the storage tank through a fuel suction strainer by a motor driven positive displacement gear type pump. Some of the fuel is pumped through a preheater, and some is directed through an Amot Mixing Valve. Warm fuel from the preheater goes to the Amot Valve where it is mixed with fuel from the Pump. Fuel, which exits the Mixing Valve, first flows through a strainer and then through the Primary Fuel Filter, and the Engine-Mounted Filters.

use modified F-FU37531

Figure 2-1 Fuel Oil System After passing through the engine mounted dual-element filter, the fuel flows through manifolds that extend along both banks of the engine. These manifolds supply fuel to the injectors. The fuel pump delivers more fuel oil to the injectors than is injected into the cylinders. The excess fuel is used to cool and lubricate the close tolerance injector parts. Fuel returning from the injectors passes through the “return fuel” sight glass and back to the fuel tank. Refer to Figure 2-1. A relief valve at the inlet to the “return fuel” sight glass establishes a fuel back pressure, thus maintaining a positive supply of fuel for the injectors.

FUEL SYSTEM 2-1

A bypass valve and gauge is connected across the primary filters. If the primary filters become plugged, fuel will bypass and impose the total filtering load on the engine mounted dual element filter. As the engine mounted fuel filter elements become plugged, fuel flow to the injectors is limited. A relief valve will open at a preset high pressure to return fuel to the tank, bypassing the fuel injectors.

FUEL SUCTION STRAINER The fuel suction strainer, Figure 2-2, should be cleaned and inspected at the intervals stated in the Scheduled Maintenance Program or at shorter intervals if operating conditions warrant.

CLEANING PROCEDURE 1. Stop the diesel engine and turn the fuel pump circuit breaker OFF. 2. Remove the bolts holding the strainer shell to the strainer cover and remove the shell and strainer from the cover. To prevent loss, thread the bolts with washers into the strainer shell threaded openings. 3. Withdraw the strainer element, discard the oil and sediment held in the strainer shell. 4. Clean the element in a container of clean fuel oil. A brush may be used and a round wooden dowel employed to spread the pleats and determine the degree of cleanliness, but no special tools are necessary.

Figure 2-2 Fuel Oil Suction Strainer. 2-2

GT46MAC LOCOMOTIVE SERVICE MANUAL

0

CAUTION Chlorinated hydrocarbon solvents and temperatures above 180°F (82°C) will damage the epoxy material bonding the strainer element to the end caps. 5. Clean the shell with fuel oil and wipe clean. Note that the spring in the bottom is spot welded to the shell. 6. Inspect the housing-to-cover “O” ring, and replace it with a new ring if necessary. 7. Place the cleaned strainer element in the shell and reapply the shell to the strainer cover. Tighten firmly into place after making certain the “O” ring is properly seated.

FUEL PUMP AND MOTOR The motor driven fuel pump, Figure 2-3, page 2-3, is mounted on the equipment rack. It is an “internal” gear pump driven by battery power during system priming and by power from the auxiliary generator during operation.

F43262

Figure 2-3 Fuel Pump Cross Section Fuel is drawn into the inlet portion to fill a space created by the gear teeth coming out of mesh. The fuel is then trapped in the space between the gear teeth and carried to the outlet side of the pump where the gears mesh, forcing the fuel from between the gear teeth out through the outlet. The fuel pump and motor need no routine maintenance - the motor and pump should be maintained in accordance with EMD Maintenance Instructions listed on the Service Data page. Maintenance should be performed at the intervals stipulated in the Scheduled Maintenance Program (MI 1777).

FUEL SYSTEM 2-3

FUEL PUMP CIRCUIT After locomotive control circuits are properly established, closing the control and fuel pump switch (on the #2 control console) provides an input to the computer, Figure 2-4, page 2-5, which enables the fuel pump relay FPR, and provides the engineer with the means of shutting off the fuel pump with the switch on this panel. Before the engine is running the fuel pump relay performs no function. With the control circuits established and FPR enabled, rotating the fuel prime/ engine start switch (FP/ES) to FUEL PRIME position provides a signal to the computer which turns on the fuel pump motor. After the system is primed and fuel flows free and clear in the return fuel sight glass, the FP/ES switch is rotated to the START position. This energizes the STA coil causing the cranking motors to turn the engine. The battery continues to power the fuel pump motor until engine speed comes up sufficiently to cause auxiliary generator output voltage to exceed battery voltage. The fuel pump motor will stop if either the fuel pump relay FPR opens or if any of the emergency fuel cutoff switches EFCO open. However, dropout of FPR will not immediately stop the engine. Dropout of one of the emergency fuel cutoff switches EFCO is required for immediate positioning of injector racks to the “NO-FUEL” position on units with a governor to cause engine shutdown. See “EMERGENCY FUEL CUTOFF SWITCHES,” page 2-13.

2-4


0

use F43263

Figure 2-4 Fuel Pump Circuit.

FUEL SYSTEM 2-5

PREHEATER AND MIXING VALVE The preheater mixing valve assembly uses the hot coolant from the engine to keep the fuel to a constant temperature.

PREHEATER

FU31902

Figure 2-5 Fuel Preheater and Mixing Valve Assembly.

The water flows through a tube inside the cooler. The fuel flows in the shell around the heated tube. The coolant and fuel flow through the cooler in opposite directions to produce the maximum cooling effect. Fuel exiting the preheater goes to the mixing valve.

NOTE:

If water is present in the fuel system, the preheater should be thoroughly checked for possible leakage.

2-6


0

MIXING VALVE The mixing valve mixes the cold fuel from the pump with the hot fuel from the preheater. The mixing is thermostatically controlled to keep the fuel exiting the valve at a nominal temperature of 35°C (95°F). It is composed mainly of a housing and a thermostatic element. The housing has three Ports, the mixed fuel enters at output Port A, the hot fuel from the preheater enters at Port B and cold fuel enters from the pump at Port C. The thermostatic element keeps the output fuel at the nominal temperature by controlling the quantity of cold fuel to be mixed with the hot fuel.

fu31903

Figure 2-6 AMOT Mixing Valve (Cut Away View).

FUEL SYSTEM 2-7

PRIMARY FUEL FILTER SINGLE CANISTER-TYPE A canister-type primary fuel filter assembly is mounted on the equipment rack under the lube oil cooler assembly. Change the canister filter element at the intervals stated in the Scheduled Maintenance Program or more frequently, if operating conditions warrant.

fu38307

Figure 2-7 Single Canister - Primary Fuel Filter Assembly

FU37790

Figure 2-8 System Diagram: Single Canister - Primary Fuel Filter Assembly

2-8


0

CLEANING PROCEDURE: 1. Set isolation switch to ISOLATE and stop the diesel engine 2. Place a 5 gallon container to catch fuel under the filter housing and open the filter vent valve at the top of the filter housing. Open the filter drain gate valve at the side of the filter housing bottom, or located near the fuel suction strainer and tagged: “FUEL FILTER DRAIN”. Valve handle is spring loaded and must be held in the OPEN position (handle parallel to drain line) until filter housing is drained. (Note: A helper may be needed for this step.) WARNING If the drain valve is opened shortly after engine shutdown, pressure retained in the system will allow fuel to drain rapidly. Fuel drained from the filter housing is piped back to the fuel tank. 3. Wipe out inside of collar around cover to remove any dirt or contaminants. 4. After enough time has elapsed to allow adequate filter drainage. a. Loosen the hand knob until it contacts the stop nut (approximately 3 turns). Do NOT use a hammer to loosen the hand knob.Place a container for the used filter element at a convenient location. b. Raise and hold safety latch in raised position. Grasp wing grips and rotate cover in slots. If cover sticks, use a screw driver to pry against the cross bar. c. Pull cover outward and engage hinge pin in hinge brackets, then swing cover downward. 5. After an adequate drainage period; A. loosen the 3 cover bolt nuts and swing open the hinged cover. 6. Remove and quickly dispose of the used filter element. NOTE Any fuel spilling from the bottom of the housing will leak into the drainpan. From there it is piped to the oil filter drain pan which in turn is piped to the engine pit drain. 7. Using only clean bound edge towels, wipe out the interior of the filter housing. Clean up the drain pan and surrounding area. 8. Insert a new filter element consisting of part number as shown on the Service Data page. Make certain that the element is fully seated over the standpipe. Note: Be certain to use only approved replacement element. 9. When the filter element is properly inserted, inspect the “O” ring in the circular groove in the housing cover. Replace, if necessary, with part number shown on Service Data page.

FUEL SYSTEM 2-9

10.

a.) Swing cover upward. Grasp wing grips and hold safety latch in raised position, then push cover inward. b.) Rotate cover to engage cross bar securely in slots, then lower safety latch and tighten hand knob until it is hand tight. Do NOT use a hammer to tighten the hand knob.

11. Close the filter drain gate valve and vent valve. 12. Turn fuel prime/ engine start (FP/ES) switch lever to FUEL PRIME position and hold it there until fuel runs free and clear of bubbles through the return fuel sight glass.

PRIMARY FUEL FILTER BYPASS VALVE AND GAUGE This gauge, Figure 2-9, indicates the condition of the primary fuel filter. Increased pressure differential across the primary fuel filter will be indicated by a greater reading on the gauge. Normally, with new primary filters, the gauge should read in the green zone. As the filter element becomes plugged, the indicator will read higher until it reaches the red CHANGE FILTER zone at approximately 30 psi (207 kPa) pressure differential. At this point, the bypass valve will begin to open, allowing the fuel oil to bypass the primary fuel filter. Renew primary fuel filter elements when the indicator reaches the CHANGE FILTER zone.

Fu34996

Figure 2-9 Primary Fuel Filter Bypass Valve and Gauge.

2-10


0

ENGINE MOUNTED FUEL FILTER ASSEMBLY FUEL SIGHT GLASSES Two sight glasses, Figure 2-10, are located on the engine mounted filter housing to give visual indication of fuel system condition.

F27505

Figure 2-10 Fuel Oil Sight Glass Fuel flowing through the return fuel sight glass (sight glass closest to engine) is the excess fuel that has circulated through the engine without being injected. Upon leaving the sight glass it returns to the fuel tank for recirculation. Upon engine start with governor-controlled engines, the return fuel sight glass will be empty. When the fuel system is primed, turbulent flow will occur as evidenced by bubbles in the sight glass. When the fuel in the glass flows clear and free of bubbles, the engine may be cranked. The engine mounted filter is also equipped with a bypass relief valve and sight glass. This sight glass, farther from the engine, is normally empty. When more than a trickle of fuel is seen in the bypass sight glass, it indicates that the relief valve is open. Fuel will pass through the bypass sight glass and relief valve to bypass the engine and return to the fuel tank when the filter elements become clogged. This condition may become serious and cause the engine to shut down from lack of fuel.

ENGINE MOUNTED (Spin On) FUEL FILTERS The engine mounted spin-on type fuel filters should be changed at the intervals stipulated in the Scheduled Maintenance Program, or whenever fuel appears in the bypass sight glass. . The filter assembly should be maintained in accordance with the instructions in the Engine Maintenance Manual. Refer to the following procedure while changing filter elements.

FUEL SYSTEM 2-11

1. Shut engine down. 2. Unscrew and discard the elements. Use a strap wrench if necessary. 3. Clean the filter and sight glass assemblies. 4. Apply a film of oil to the element gaskets. 5. Apply the elements to the filter body. Hand tighten until the gasket contacts the filter body, then tighten one-half turn. 6. Check for leaks after the engine is started.

DRAINING CONDENSATE FROM THE FUEL TANK Condensate should be drained from the locomotive fuel tank at the intervals as defined in the Scheduled Maintenance Program, or more frequently if conditions warrant. During draining, the locomotive should be placed on an incline with the drain end of the tank facing downhill to ensure condensate accumulation at the water drain valve, Figure 2-1, page 2-1, and adequate drainage without loss of fuel.

fu31766

Figure 2-11 Fuel Filler Assembly.

FILLING THE FUEL TANK The fuel tank can be filled on either side of the locomotive. The fuel tank is equipped with one fuel filler pipe at each side of the locomotive. A short fuel level sight gauge is located next to the fuel filler pipe. This gauge indicates the fuel level from the top of the tank to about 4-1/2 inches below the top and should be observed while filling the tank to prevent overfilling. Figure 2-11 illustrates a fuel filler and cap assembly. Periodically inspect the fuel strainer and check the condition of the filler cap gaskets.

2-12


0

FUEL STORAGE FACILITIES The presence of slime on fuel filters indicates that bacteria and fungi are present in troublesome quantities. Water in the fuel storage tanks should be kept at the lowest possible level. Contact fuel oil suppliers for recommendations regarding antiseptic treatment of fuel storage facilities.

EMERGENCY FUEL CUTOFF SWITCHES Two emergency fuel cutoff (EFCO) switches, one on each side of the locomotive, are located on the underframe near the fuel fillers, and a third EFCO switch is located on the engine control panel. Operating any of the EFCO push-button switches, even momentarily, opens the line feeding both the computer DIO-2 module NOEFCO input channel and the EFCO relay coil terminal Y.

EFCO relay dropout causes immediate dropout of fuel pump relay FPR, and pickup of governor solenoid DV. These events start the engine shutdown process. As soon as the push button is released, the EFCO relay picks up again. However, if the push button is held in for at least 0.5 second, the computer recognizes that the NOEFCO input is absent. Once the computer recognizes that the NOEFCO input is missing, EM2000 turns OFF the output channels A valve, B valve, and C valve and turns ON the output channel D valve to complete the engine shutdown process, even if the push button is released. When the computer recognizes that the NOEFCO input is missing, it also: • Picks up turbo lube pump relay TLPR for up to 35 minutes, causing the pump to operate for that period of time; • Picks up alarm relay AR to ring the alarm bell and energize trainline 2T, provided that the computer is receiving the ER SW input (ENGINE RUN switch up or trainline 16T energized); and • Displays EMERGENCY FUEL CUTOFF ACTIVATED crew message until next time that Fuel Prime/Engine Start (FP/ES) switch is activated.

FUEL SYSTEM 2-13

2-14


0

SERVICE DATA - FUEL SYSTEM ROUTINE MAINTENANCE PARTS AND EQUIPMENT FILTERS

Part No.

Primary Fuel Filter Assembly - Two Stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10636643 Pleated Paper Element . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40056007 Cover Gasket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40061836 Engine Mounted Filter Assembly, Spin On Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40047323 Filter Element . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8423132 Fuel Filter Body . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8479301 Suction Strainer Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8341983 Mesh Element . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9324489 “O” Ring, Housing to Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8343161 Pressure Differential Gauge With Bypass Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10632529 FUEL PUMP

Fuel Pump & Motor Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40037370

SPECIFICATIONS Fuel Tank Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6000 Litres (1585 US gallons)

FUEL SYSTEM 2-15

2-16


0

SECTION 3. LUBRICATING OIL SYSTEM INTRODUCTION Oil flow through the lubricating oil system is shown in Figure 3-2, “Lube Oil System Diagram” on page 3-2. Oil under pressure is forced through the engine for lubrication and piston cooling by a positive displacement combination piston cooling and lubricating oil pump. After circulating through the engine, the lubricating oil drains into the oil pan. A positive displacement scavenging oil pump draws oil from the sump and strainer housing, then forces it through the oil filter and cooler. From the cooler, the oil is delivered to another compartment in the oil strainer assembly where it is available for recirculation by the combination piston cooling and lubricating oil pump. The lubricating oil pumps are mounted on the front end of the engine and are gear driven by the engine through the accessory drive gear train. The oil strainer housing is also mounted on the front of the engine. The oil cooler and filter assemblies are located on the equipment rack adjacent to the front of the engine at the long hood end of the locomotive.

WARNING Use the dipstick to check oil level rather than removing a handhole cover - in some circumstances the oil level may be above the bottom of the oil pan handholes.

OIL LEVEL GAUGE (DIPSTICK) An oil level gauge, Figure 3-1, extends from the side of the oil pan into the oil pan sump. The oil level should be maintained between the low and full marks on the gauge, with the readings taken when the engine is at idle speed and the oil is hot.

F22847

Figure 3-1 Lube Oil Gauge (Dipstick)

LUBRICATING OIL SYSTEM 3-1

LU37628

1) Lube Oil Filter Assembly 2) Lube Oil Cooler 3) Strainer Housing 4) Turbo Lube Pump 5) Soakback Filter 6) Turbo Lube Filter

7) Scavenging Oil Pump 8) Turbo Charger 9) Hot Oil Detector 10) Main Lube/Piston Cooling Pump 11) Oil Pressure Gauge

Figure 3-2 Lube Oil System Diagram 3-2


0

FILLING OR ADDING OIL TO SYSTEM When filling or adding oil to the system, it is recommended that the oil be poured into the strainer housing through the square opening as shown in Figure 3-3. Should it be found more desirable to add oil through a handhole opening in the engine oil pan, it is imperative that the strainer housing be filled before starting the engine. Failure to do this may result in serious engine damage due to the time delay before oil is completely circulated through the system and then to the working parts of the engine. If the system has not been drained, oil may be added to the strainer housing with the engine running or stopped.

WARNING Do not remove the round caps from the strainer housing while the engine is running as hot oil under pressure will come from the openings and serious injury could result.

use 19243 (new EMD TBA)

Figure 3-3 Filling or Adding Oil.


Lu37885

Figure 3-4 Lube Oil System Diagram #2 3-4


0

OIL FILTER INSPECTION AND MAINTENANCE OIL FILTER INSPECTION PROCEDURES The lube oil filter tank cover is equipped with a male quick disconnect fitting, Figure 3-5, to accept a female coupler. The fitting facilitates application of a pressure gauge to monitor filter tank pressure, which indicates the condition of the filter elements.

use 22481 (emd#)

Figure 3-5 Quick Disconnect Fitting. Periodic pressure readings will help prevent undue engine wear by alerting the maintenance crew when filter element plugging and bypass are about to occur. If a locomotive has a short filter element life, there may be water leaks or a heavy dirt load. The engine probably needs maintenance. Lube oil filter pressure checks are to be made WEEKLY OR MORE OFTEN, the engine may be loaded or unloaded. However, the best time to perform these tests is soon after a unit comes in from a run, thereby ensuring an adequately high degree of lube oil temperature. Readings must be taken when lube oil temperature is at least 66°C (150°F). Since there is no convenient gauge to indicate lube oil temperature, perform test when water temperature is at a minimum of 150°F 66°C. Water temperature can easily been seen on EM2000 display. From the MAIN MENU select DATA METER, then COOLING SYSTEM. The water temperature is indicated by ETP1 and ETP2 (Engine Temp. Probes) Filter elements must be renewed if filter tank pressure reaches: •

172 kPa (25 psi) at throttle position No. 8 OR

•

48 kPa (7 psi) at IDLE speed.

Readings taken at throttle No. 8 engine speed are the most reliable. Therefore, if a marginal reading is obtained at idle engine speed, verify filter element condition at No. 8 engine speed.


Oil filter elements, Figure 3-6., “Lube Oil Filter Assembly” on page 3-6, should be replaced with new elements at the intervals stipulated in the Scheduled Maintenance Program. Use only approved elements as indicated on the Service Data page.

OIL FILTER PROCEDURES MAINTENANCE 1. Operate the diesel engine until oil is warm and circulating freely, then stop the engine and remove the starting fuse. 2. Remove the square cap from the engine mounted lube oil strainer housing, Figure 3-3, “Filling or Adding Oil.” on page 3-3.

LU42615

Figure 3-6.Lube Oil Filter Assembly . 3. Raise and latch the strainer drain gate valve handle in the engine strainer housing to drain oil from the filter housing into the engine sump. It is not necessary to move the valve handle that drains the oil strainer housing. NOTE: Depending upon the temperature of the oil and system at the time that the drain valve is opened, adequate drainage of the lube oil filter can take from 1/2 hour for hot oil and a hot system to several hours for a cool system. If the system is fully charged at the time the system is to be drained, the oil level will rise above the bottom of the oil pan inspection covers. 4. After enough time has elapsed to allow adequate drainage and easy handling of the filters, slightly loosen the nuts on the filter housing cover. Oil remaining at the bottom of the housing will leak into the drain pan. From there it is piped to the engineroom drainage sump. 5. Place a container for used filter elements at a convenient location and provide adequate quantities of bound edge towels. 6. After oil has stopped draining from under the flat filter housing cover, loosen the retaining nuts and swing the hinge bolts clear of the cover. Swing the cover open. Remove and quickly dispose of used filter elements. 3-6


0 7. Using only clean bound edge towels, clean out the interior of the filter housing. Clean up the drain pan and surrounding area. 8. Insert a set of five (5) new filter elements of 15 inches long, consisting of part numbers shown on the Service Data page. Make certain that the elements are fully seated over the standpipes.

NOTE Approved pleated paper elements have a red casing. When the complement of paper elements is used, be certain to replace with only approved elements.

9. When the filter elements are properly inserted, inspect the “O” ring in the circular groove in the housing cover. Replace if necessary. 10. Close the cover. A guide hole in the filter cover must mate with a dowel on the filter housing body before the cover can be closed. 11. Swing the hinge bolts into place and tighten the hold-down nuts, to 81 N⋅m (60 ft-lbs) . 12. At the intervals stipulated in the Scheduled Maintenance Program, remove and inspect the internal filter bypass relief valve assembly, Figure 3-7.. The procedure is detailed in the article entitled “Inspection Of Bypass Valve Assembly”. 13. Close the filter drain gate valve at the oil strainer.

13454

Figure 3-7.Filter Bypass Relief Valve Assembly. 14. Before starting the engine, check the oil level, using the dipstick. Oil level should be above the full mark on the dipstick with engine shut down. Start the engine and allow it to run at idle speed. Check the oil level at the dipstick. Add oil if necessary. See Figure 3-3, “Filling or Adding Oil.” on page 3-3. 15. Replace and tighten down the square cover on the oil strainer. 16. Inspect for oil leaks at the filter housing. Tighten the hold-down nuts as necessary to stop any leaks. LUBRICATING OIL SYSTEM 3-7

BYPASS VALVE ASSEMBLY The internal filter bypass relief valve assembly, Figure 3-7., “Filter Bypass Relief Valve Assembly” on page 3-7, should be removed and checked periodically at intervals stipulated in the Scheduled Maintenance Program or whenever improper oil filtration is suspected. However, operation of the valve assembly cannot be effectively checked on the locomotive. For this reason it is recommended that qualified spare assemblies be available for exchange during maintenance procedures. A bench test and inspection may then be performed in accordance with the appropriate Maintenance Instruction listed on the Service Data page.

REMOVAL 1. After the oil has been drained from the filter housing, the elements removed, and the housing cleaned; remove the hold-down bolts from the bypass valve assembly and remove the assembly. 2. Replace the filter bypass relief valve assembly with a qualified spare. Seat the assembly properly and tighten the hold-down bolts to 33 N⋅m (24 ft-lbs) torque. Tighten the cover hold-down nuts to between 75 to 81 N⋅m (55 to 60 ft-lbs) torque, using standard tightening procedure. If a qualified spare is not available, the valve assembly should nevertheless be removed from the filter housing and cleaned of sludge and varnish by washing in solvent. The assembly should be carefully inspected after cleaning. If the poppet stem or valve body guide is worn, those pieces should be replaced with new pieces.

TEST OF VALVE SPRING If a qualified spare is not available, the valve spring should be tested by compressing it to a specific height. If this requires more or less than the values shown on the Service Data page, the spring should be replaced with a new spring.

OIL COOLER INSPECTION AND MAINTENANCE Major servicing of the oil cooler should not be undertaken until the need for such maintenance is definitely established by unsatisfactory operation, suspected oil cooler core leaks, or wide temperature differential between cooling water and engine oil.

WATER LEAKS There are no simple methods of detecting water leaks to the oil side of the lubricating oil cooler assembly- evidence of water contamination will show up in the routine engine oil samples analyzed as prescribed in the Scheduled Maintenance Program. Any such evidence calls for a close examination of the cooler and inspection of the engine. Maintenance Instructions for cleaning and repair of the lubricating oil cooler are listed on the Service Data page.

3-8


0

QUALIFICATION PROCEDURE Proper lubricating oil temperatures are dependent upon maximum lube oil cooler performance. Operation of the hot lubricating oil detector provides indication that the lube oil cooler may not be functioning efficiently. However, in order to obtain a valid indication of oil cooler performance, the locomotive must be operated at its full rated load and engine speed while the oil and water temperatures are allowed to stabilize. 1. At the right bank engine water inlet elbow, Figure 3-8, “Oil Cooler Qualification.” on page 3-10, fill the thermometer well with oil. Water temperature into the engine will be taken at this point. 2. Using EM2000 display, from the MAIN MENU select SELF TEST then SELF LOAD or set up engine loading apparatus capable of taking the full rated load of the locomotive. Refer to the Load Testing section of the manual for instructions covering the load testing setup.

CAUTION Many standard load boxes are not of sufficient capacity to fully load the locomotive. 3. Remove the square cover from the engine mounted oil strainer and hang a cage thermometer in the overflow oil compartment of the strainer housing, Figure 3-8, “Oil Cooler Qualification.” on page 3-10. (This is oil out of the cooler - oil flows from the oil cooler into the strainer.) Make certain that the thermometer bulb is well below the surface of the oil and is kept submerged when the reading is taken. 4. Insert a thermometer into the well located at the engine water inlet. 5. Operate the engine and apply load. Do not operate above throttle position 2 until water temperature is above 49°C (120°F). Operate at full load and speed until engine water inlet temperature is stabilized. It may be necessary to block the shutters open to maintain a constant temperature.

NOTE Readings taken at 15 minute intervals will indicate when a stable operating condition is reached. 6. Record temperature readings and compare them with performance baseline EE provided in Maintenance Instruction M.I. 928. When oil temperature for a given water temperature is higher than limit indicated, oil cooler should be serviced in accordance with Maintenance Instruction listed on Service Data.


F-LU30530

Figure 3-8 Oil Cooler Qualification.

HOT OIL DETECTOR A thermostatic valve, located on the outlet elbow from the main lube oil pump, is calibrated to open when lube oil temperature reaches a nominal 124°C (255°F). At this temperature it is probable that the lube oil cooler is plugged on the water side. When oil temperature causes the valve to open, pressure to the oil pressure detecting device in the engine governor is dumped. The device detects low oil pressure and reacts to shut the engine down. The thermostatic valve is not latching, and it will reset automatically when oil temperature falls.

WARNING If it is determined that hot oil is the cause for engine shutdown, make no further engineroom inspections until the engine has cooled sufficiently to preclude the possibility that hot oil vapor may ignite. When a low oil shutdown occurs, always inspect for an adequate supply of water and oil. Also check engine water temperature. Do not add cold water to an overheated engine.

3-10


0

use LU101e

Figure 3-9 Hot Oil Detector Thermostatic Valve. HOT OIL DETECTOR QUALIFICATION Remove detector from engine and test as follows: 1. Connect air lines to and from valve so that flow is in direction of arrow. 2. Place valve in an agitated liquid bath so that half the valve body is immersed. (Dow glycerine, USP Grade 96% recommended.) 3. Heat the bath. When the bath reaches113°C (235°F), the rate of rise must not exceed 0.6°C (1°F) per minute. 4. Apply 345 kPa (50 psi) air pressure and observe for leaks. Leaks between the valve body and cap are not permissible. 5. At 121°C (250°F) the maximum rate of leakage is 10 SCFH. (Standard cubic feet of air per hour.) 6. Remove air flow to avoid chilling. 7. Raise temperature to 126°C (258°F). 8. Turn on air. Minimum rate of flow to be 20 SCFH.


TURBOCHARGER Turbocharger lubricating oil is obtained from the engine lubrication system. A separate automatically started motor driven turbocharger lube oil pump is used to supply oil to the turbocharger prior to starting the engine and whenever the engine is shut down. The motor is timed to operate approximately 35 minutes after each time it is started. Oil circulation through the turbocharger is necessary prior to starting the engine and during the period when the engine oil pressure is building up to provide proper lubrication. After the engine is shut down, continued oil circulation is necessary to remove residual heat from the turbo and return the hot oil to the oil pan sump. Pump operation requires the main battery knife switch, the computer and the turbocharger pump circuit breaker to be closed (main battery knife switch may be opened after engine shutdown). Turbo lube pump timing after shutdown is based on the Highest throttle position attained in the previous sixty minutes. Throttle position is logged by the computer. If throttle remains in position for 2 minutes or more the timing is as follows.

Throttle Position (at or below)

Time

TH 1

15 Mins

TH 2

20 Mins

TH 3

25 Mins

TH 4

30 Mins

TH 5 (or higher)

35 Mins

The turbocharger lube oil pump draws oil from the oil pan sump. Discharge oil from the pump is then filtered and fed into the head assembly of the main turbocharger oil filter. This head assembly contains the check valves required for proper lube oil flow. Oil from the filter head assembly is then directed to the turbocharger.

TURBOCHARGER LUBE PUMP CIRCUIT The turbo lube pump motor (TLP) must be operated before engine start to prelube the turbocharger bearings. The turbo lube pump motor is controlled by the turbo lube pump relay TLPR circuit which is enabled by the control computer when these conditions are satisfied: • • • •

BATTERY SWITCH closed COMPUTER CONTROL circuit breaker closed. TURBO. circuit breaker closed. LOCAL CONTROL circuit breaker closed.

When the fuel prime/engine start (FP/ES) switch is held in the FUEL PRIME position, an input signal PRIME is sent to the computer through DIO-2 (IN) (CH7).

3-12


0 The Computer then sends an ouput signal through D1O-2(OUT) CH23 to energize the TLPR relay. TPLR interlocks #2 close and the turbo lube oil pump starts . D1O-1(IN) channels 23 & 24 tell the computer that the turbo CB is closed and the TLPR interlocks are closed.

use modified F-Lu37886

Figure 3-10 Lube Pump Circuit/Engine Prime.

LUBRICATING OIL SAMPLING AND ANALYSIS A lubricating oil sample should be taken for analysis at the intervals stipulated in the Scheduled Maintenance Program. The sample should be submitted to a competent laboratory to monitor the suitability of the oil for continued use. Obtain the sample in the following manner.

WARNING Under some conditions the oil level may be above the bottom of the oil pan handholes, so care must be taken when the oil pan handhole covers are removed. 1. Run the engine long enough to ensure thorough circulation. 2. Shut the engine down and remove the starting fuse. 3. Obtain the oil sample (normally 0.5 liter (1 pint)) at the center of the oil pan halfway between the surface and the bottom of the pan.

NOTE Inconsistent sampling techniques will produce inconsistent results.


PRELUBRICATION OF ENGINE Prelubrication of a new Engine, an Engine that has been overhauled, or an engine which has been inoperative for more than 48 hours, is a necessary and important practice. Prelubrication alleviates placing a load on unlubricated engine parts during the interval when the Lube Oil Pump is filling the passages with oil. It also offers protection, by giving visual evidence of satisfactory oil distribution in the Engine. Perform the prelubrication as follows: 1. Remove the pipe plus at the main Lube Oil Pump discharge elbow, and connect an external source of clean, warm oil at the elbow. Prelube the Engine at a minimum of 10 PSI, for a period of not less than three, and not more than five minutes. This amounts to approximately 15 GP-M, when using a 1.5 to 2 HP motor. 2. As the oil pressure is being applied, open the cylinder test valves, and bar the Engine over one complete revolution. Check for an oil flow at all crankshaft bearings, at camshafts, rocker arm , and at the rear gear train. In addition, check for restrictions and excessive oil flow. Check for fluid discharge at the cylinder test valves. If fluid discharge is observed from any cylinder test valve, investigate the cause, and make the necessary repairs. 3. On new or overhauled Engines, remove the pipe plug at the piston Cooling, Oil Pump discharge elbow, and connect the external oil source at that opening. Check for unrestricted oil flow at each piston cooling tube. 4. Disconnect the external oil source, and replace the pipe plugs. Close the cylinder test valves. 5. Pour a liberal amount of oil over the rocker arm cylinder mechanism of each bank. 6. Check the oil level in the strainer housing. If required, add oil to the strainer housing until it overflows into the oil pan. 7. Replace, and securely close, all handhole covers and the Engine top deck cover.

NOTE When an engine is replaced due to mechanical breakdown, the entire oil system, (such as oil coolers, filters, and strainers), should be thoroughly cleaned before a replacement engine, (or the reconditioned Engine), is placed in service. If other system components have been neglected, a recurrence of trouble may be experienced in the clean engine. In some cases, by draining the oil and applying an anti-rust compound, engines have been removed from service and stored in the "as is" condition. When these engines are returned to service, and before adding oil and prelubing the engine, loose deposits must be flushed out. To break up any sludge deposits, the entire engine should be sprayed with fuel, and then drained. Care must be taken that the drains do not plug. Fuel should not be sprayed directly on the valve mechanism or bearings. Since lubrication will be removed, dirt might be forced into these areas. The surfaces should then be wiped dry, before new oil is added to the engine.

3-14


0

SERVICE DATA - LUBRICATING OIL SYSTEM ROUTINE MAINTENANCE PARTS AND EQUIPMENT Pleated Cotton-Paper Elements (5 per housing). . . . . . . . .9545152

NOTE Filter changeout recommendation will be found in the applicable Scheduled Maintenance Program. “O” Ring Seals (Lube Oil Inlet/Outlet) . . . . . . . . . . . . . . 9557674 “O” Ring Seal (Cover) . . . . . . . . . . . . . . . . . . . . . . . . . . . 40065194 Hot Oil Detector - Thermostatic Valve . . . . . . . . . . . . . . 8427032 Hot Oil Detector Gasket . . . . . . . . . . . . . . . . . . . . . . . . . . 40034621

NOTE It is recommended that qualified spare bypass valve assemblies be kept available for scheduled maintenance replacement. Quick Disconnect Male Fitting. . . . . . . . . . . . . . . . . . . . . 9321340 Quick Disconnect Female Fitting . . . . . . . . . . . . . . . . . . . 9321341 Lube Oil Tank Pressure Test Kit (0-100 psi gauge, hose, and female quick disconnect fitting) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9325061

SPECIFICATIONS Oil Pan Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 950 liters (251 gal)

NOTE A weight of between 191 and 227 kg (420 - 500 lbs) is required to compress filter bypass valve spring to a height of 92 mm (3-5/8 in).


3-16


0

SECTION 4. COOLING SYSTEM INTRODUCTION The engine-mounted water pumps, draw cooling water from the expansion tank and lube oil cooler assembly, and pump it into the engine. The heated water leaves the engine, and flows through two radiator assemblies where it is cooled. The cooled water then returns by way of the oil cooler to repeat the closed-loop cycle. Part of the water from the water pumps is piped to the air compressor. There are no valves in this line, air compressor cooling is provided whenever the engine is running.

F43264

Figure 4-1 Cooling System Diagram Two electronic temperature sensing probes (ETP1-2) are located in the water line from the oil cooler to the inlet of the water pump on the engine left side, near the water temperature gauge. Temperature probe readings are converted by ADA Module (analog to digital to analog) to digital signals used by the EM2000 to control all cooling functions. If the EM2000 computer detects that either temperature probes has failed, it sends a crew message ENGINE TEMPERATURE FEEDBACK FAILURE to the EM2000 display screen and also stores the message in Archive memory. If it detects that both probes have failed, it ignores both probe signals, fans remain in last operations status, engine speed goes back to idle and the following message is stored in archive memory, NOT LOADING-ENGINE TEMP FB FAILURE.

COOLING SYSTEM 4-1

RADIATORS AND COOLING FANS During circulation through the diesel engine, air compressor and oil cooler, the coolant picks up heat which must be dissipated. Water temperature is controlled by means of radiator banks and AC motor-driven cooling fans. Refer to Figure 4-2, “Radiator, Cooling Fan, and Shutter Arrangement” on page 4-2 and Figure 4-3, “Two Speed Cooling Fan AC Motor Circuit.” on page 4-5.

F-26660

Figure 4-2 Radiator, Cooling Fan, and Shutter Arrangement The radiators are located in a hatch at the top of the long hood end of the locomotive. The hatch contains the radiator assemblies, which are grouped in two banks. Each radiator bank consists of two quad length radiator core assemblies, bolted end-to-end. Headers are mounted on the radiator core to form the inlet and outlet ends of the radiator assembly, a bypass line is provided between the inlet and outlet lines in order to reduce velocity in the radiator tubes. The cooling water from the engine is piped to the headers of each radiator bank. The discharge from the radiators enters the oil cooler. From there, the water returns to the water pumps for recirculation.

4-2


0 Two 8 blade 52” cooling fans, which operate independently, are located under the radiators in the long hood carbody structure. They are numbered 1, and 2, with the No. 1 fan being closest to the cab. For fuel efficiency, each cooling fan is driven by a two-speed AC motor, which in turn is powered by the companion alternator. As the engine coolant temperature rises, the fans are energized in sequence by the control computer (slow speed). As additional cooling is required, the fans switch to full speed in progression as coolant temperature rises. As coolant temperature drops, the fans switch off one at a time. The cooling fans are controlled by the computer which act on the contactors. The computer also controls the fan sequencing duty cycle and speed (low or high) to ensure even fan and contactor wear. The two-speed cooling fan system consists of two full speed contactors (FCFA and FCFB) and one slow speed contactor (FCS) per cooling fan motor. The system maintains the coolant temperature within a predetermined range of from 79º C to 85º C (175º F to 185º F).

COOLING FAN TWO-SPEED AC MOTOR CONTROL Each fan motor circuit consists of one slow-speed, and two fast-speed contactors that are located in the AC cabinet. The following circuit description concerns only fan motor No.1, with associated slow-speed contactor FCS1, and fast-speed contactors FCF1A and FCF1B. The circuits for fan motors 2 operates in a similar manner. The J-K interlocks of FCF1A and FCF1B, in series with the FCS1 coil, ensure that FCS1 cannot be picked up unless FCF1A and FCF1B are both dropped out. If thus enabled, the computer FCS1 output channel 1 (DIO-2 OUT) picks up FCS1 by completing the circuit to negative. If FCS1 is picked up, the J-K interlocks of FCS1 prevent the pickup of FCF1A and FCF1B. When the computer picks up FCF1A, the FCF1A E-F interlocks close to pick up FCF1B without requiring a separate FCF1B output from the computer. When FCS1 is picked up, its L-M contacts close. This provides a multiplexed feedback signal to computer FCS1 input channel 6 (DIO-2 IN). In a similar manner, when both FCF1A and FCF1B are picked up, their closed contacts provide a feedback signal to computer FCF1A/B input channel 7 (DIO-1 IN). In this way, the computer monitors fan contactor status. Figure 4-4, “Radiator Fan Control Circuit” on page 4-6, illustrates how the main contacts of FCS1, and FCF1A/B control the speed of the No. 1 fan motor. The pickup of FCS1 connects the No. 1 fan motor stator windings in series-wye configuration across the AC power from the companion alternator. This causes the cooling fan to rotate at slow speed. FCF1A and FCF1B pickup connects the No. 1 fan motor stator windings in parallel-wye configuration across the AC power from the companion alternator. This causes the cooling fan to rotate at full (fast) speed.

COOLING SYSTEM 4-3

When coolant temperature exceeds the operating range upper limit, the computer begins turning fans ON. The fans will continue to turn ON until the temperature has dropped back within the operating range. Any fans that were ON when the operating temperature range was entered, will remain ON as long as the coolant temperature stays within this range. If the temperature continues to drop, and goes below the lower limit of the operating temperature range, any fans that were ON will begin to drop out. Fans will continue to be dropped out as long as the engine temperature stays below the operating range. If the temperature jumps back into the operating temperature range, the fans that are still ON will remain ON for as long as the temperature stays in this range. All fans will be picked up in sequence, starting with the slow speed mode. There is a 20 second interval between fan energizations. Twenty seconds after the last slow speed fan was energized, the fans will then be picked up at fast speed, as required. There will still be a 20 second interval between pickups, in the same order as slow speed. Once a fan is turned ON, it must remain ON for at least 2 minutes before it will be stepped down from fast to slow, or slow to OFF. The only exception is if the engine temperature dropped below 66°C (150°F) (possibly during the turbo cooldown cycle). In this case, all fans will be turned OFF instantly. This will minimize the possibility of the water temperature decreasing to excessively low levels, which in turn could cause the engine to exhaust white smoke. The fans will be dropped out in the same order that they were picked up, starting with the fast speed fans in 20 second intervals, and followed by the slow speed fans in 20 second intervals. The next time it becomes necessary to pick up the fans, (once the fans have dropped out), the first fan to start up will be the fan in the next position, with respect to the fan that was started first the previous time. For example, if fan #1 was the first to be picked up in a sequence, fan #2 would be the first one picked up. This is done to even out fan usage and contactor wear.

RADIATOR FAN MOTOR FUSES Fan fuses and contactors are mounted in the AC cabinet Zone 80. Each fan circuit is protected by two fuses, which are designed to open and protect the cooling fan system. The fuses are of the bolted-lug type, with fusible elements within a reinforced melamine cylinder. In order to absorb arc energy when the fuse opens, the cylinder is sand-filled. The fusible elements cannot be renewed. A blown fuse must be discarded. A spring-loaded indicator is connected in parallel with the main fuse element. When the main element opens, the indicator also opens, and a small rod protrudes from the end of the indicator. If fuses open, inspect the fan motor and circuits before installing new fuses. If inspection reveals a single blown fuse, always renew BOTH fuses in the motor circuit. This is required because the second fuse, while perhaps good in appearance will in all probability be degraded and will open next time the fan is called upon to start. Whenever fuses are removed during maintenance, always remove both fuses in the circuit. This ensures that the motor is completely isolated.

4-4


0

use F43279

Figure 4-3 Two Speed Cooling Fan AC Motor Circuit.

COOLING SYSTEM 4-5

use modified F-CL36726

Figure 4-4 Radiator Fan Control Circuit

4-6


0

OPERATING TEMPERATURE RANGE AND TURBOCHARGER COOLDOWN CYCLE The cooling system is designed to normally maintain an operating temperature of 79×C - 85×C (175×F - 185×F). However, in order to better lubricate the turbocharger bearings at low engine speeds, a special turbo cooldown cycle is activated under the following circumstances: If the throttle handle is moved below the throttle #2 position (after loading in throttle 2 and above), the temperature range is set at 71×C - 77×C (160×F 170×F) for a 20 minute period, or until the throttle is moved to, or above, position 2, whichever occurs first. The engine will also run at throttle-2 speed until the water temperature reaches 71ºC (159ºF), or the 20 minute timer has expired, whichever occurs first. All cooling fans shall be dropped out without time delay, if the water temperature drops below 68× C (155× F).

SPEEDUP DUE TO COLD ENGINE DURING ENGINE IDLE CONDITIONS If the engine water temperature probes, ETP1 & ETP2, detect that temperature is below 115×F, the engine speed will be raised to TH 2. The engine will continue to run at TH 2 for as long as the temperature stays below 125×F. Once the temperature goes above 125×F, the engine speed will again be reduced to IDLE. The isolation switch must be in RUN position for this speedup to occur. The reason for this speedup will be displayed to the crew as ENGINE SPEED INCREASE - LOW WATER TEMPERATURE.

INSPECTION AND CLEANING OF RADIATORS Periodic inspection and cleaning of the radiators, including the inlet screens in the headers, should be performed at the minimum intervals called for in the scheduled maintenance program, at more frequent intervals as determined by operating conditions, or when trouble is suspected. Since this closed-loop system will rarely require the addition of water, any progressive lowering of the water level indicates that an inspection should be made. Check carefully for small leaks (“weep”), at the junction of the radiator tubes and headers. Normally, applying clean dry compressed air to radiator top surfaces cleans both radiator cores and radiator compartments satisfactorily. NOTE: During locomotive operation, the access covers on both sides of the carbody between the Fan room and the radiator compartment must be securely bolted in place. If a swing-out cover is not in place, improper circulation of cooling air will result.

COOLING SYSTEM 4-7

HOT ENGINE CONDITION The engine cooling water temperature is sensed at the water pump inlet. When the temperature becomes excessively high, the computer will display the HOT ENGINE - THROTTLE 6 LIMIT message. In addition to the message, the computer will limit engine loading when operating in throttle position 7 or 8. This condition will remain in effect until the temperature returns to a safe limit. If operating in throttle position 6 or lower, engine load will not be reduced during a hot engine condition. However, the return to full power can only be accomplished by reducing cooling water system temperature to normal. The reduction of power assists in cooling down the engine. The reduction of engine speed minimizes the possibility of cavitation at the water pumps. The engine water temperature may be readily checked by using EM2000 display: : Select DATA METER from the main menu then, select COOLING SYSTEM a temperature gauge is also located on the inlet line to the water pump. The gauge is color-coded to indicate COLD (blue), NORMAL (green), and HOT (red). A more accurate check of engine water temperature may be obtained by placing a thermometer in the thermo-well, located in the right bank engine water inlet. A hot oil detector is located on the outlet elbow of the main Lube oil pump. If, in the unlikely event that the computer failed to reduce engine temperature, and a boiling condition created a pressure that would prevent the low water detector from tripping, the temperature of the lube oil would increase. As a result, the thermostatic valve in the hot oil detector will dump oil pressure in the line to the governor low oil pressure detector, and consequently, the diesel engine will shut down. The thermostatic valve will be automatically reset after the hot oil cools. However, until a thorough engine inspection has been completed, no attempt should be made to restart the engine after a hot oil shutdown. WARNING To prevent hot oil vapor ignition, allow sufficient time for the engine to cool down. Do not, under any circumstance, remove engine oil pan covers, air box covers, or open the top deck, for at least two hours following an emergency engine shutdown.

COOLING SYSTEM PRESSURIZATION The cooling system is pressurized to raise the boiling point of the cooling water. This in turn permits higher engine operating temperatures, with a minimal loss of coolant due to boiling. Pressurization also ensures a uniform water flow, and minimizes the possibility of water pump cavitation during transient high temperature conditions. A pressure cap, which is located on the water tank filler pipe, opens at approximately 20 PSI. By relieving excessive pressure, this prevents damage to cooling system components. The pressure cap is also equipped with a vacuum breaker. This minimizes the possibility of system damage, which could be caused by pulling a vacuum on the system as the system cools.

4-8


0 The pressure cap is equipped with a handle that aids installing and removing the cap. The most important feature of the pressure cap handle, however, is that it interlocks with the fill/relief valve handle, ensuring system pressure release (through fill/relief pipe) before pressure cap is loosened for removal. WARNING Always relieve system pressure before attempting to remove the pressure cap or the water tank plugs.

1

2

F29236

3 1. Filler/Relief Valve Handle (Pull Down To Open 2. Pressure Cap 3. Filler Pipe Connector

F29236

Figure 4-5 Pressure Cap and Filler/Relief Arrangement PRESSURE CAP AND FILLER NECK The pressure cap and filler neck should be inspected, tested, and replaced at intervals indicated in the scheduled maintenance program.

INSPECTION AND REPLACEMENT 1. If the pressure cap bell housing or other metal surfaces are bent, replace the entire cap with a new one. 2. If the filler neck sealing surface is damaged or distorted, replace the neck assembly with a new one. Use a new tank-to-neck gasket. 3. If seals are hardened or damaged, replace the pressure cap with a new one. 4. Perform a pressure test to qualify the pressure cap and filler neck. NOTE Rebuilding of Pressure caps is not recommended.

COOLING SYSTEM 4-9

COOLING SYSTEM PRESSURE TEST Quick disconnect fittings are provided on the water tank, and in the air system piping at the Equipment Rack. A locally fabricated testing apparatus can be used to pressurize the cooling system with main reservoir air. This test can be performed while the diesel engine is running, and the cooling water system is at its normal level.

F-CL32892

Figure 4-6 Cooling System Pressure Test. WARNING

Do not subject the water tank to pressures greater than 50 PSI. 1. Using the test apparatus, operate the ball valve to gradually pressurize the cooling system to approximately 25 PSI. Tolerances for the 20 PSI pressure cap are as follows: • Minimum Opening Pressure: 19 PSI • Maximum Opening Pressure: 21 PSI 2. Close the ball valve and observe the pressure gauge. The pressure should drop slowly, until the pressure cap closes. The pressure should then remain constant. Gauge pressure (PSIG) is the cap-opening pressure. 3. If the cap-opening pressure is not within the allowable tolerance, replace the cap with a new cap, and repeat the test.

4-10


0 4. If the gauge pressure does not remain constant, and falls below the allowable minimum, perform the following: a. Place a container of water at the discharge end of the water tank overflow pipe. The water level should be above the end of the pipe. Check for air bubbles. The presence of air bubbles indicates a defective cap. Relieve the system pressure, replace the cap with a new cap, and repeat the test. b. Place a container of water at the intake end of the water fill pipe, so that the water level is above the end of the pipe. Check for air bubbles. The presence of air bubbles indicates a defective fill/relief valve. Relieve the system pressure, replace the valve with a qualified valve, and repeat the test. 5. If above Steps, (4.A) and (4.B), do not detect or eliminate leakage, as indicated by a continuous drop in gauge pressure, inspect filler neck assembly and gasket, radiators, and cooling system piping connections.

OPERATING WATER LEVEL A water level instruction is located next to the water level sight glass. It indicates LOW (MINIMUM) and FULL (MAXIMUM) water levels, with ENGINE RUNNING, or DEAD (STOPPED). The water level should not be permitted to go below the applicable LOW level mark. Progressive lowering of water in the sight glass indicates a leak in the system. This should be corrected immediately. A low water level switch (float type) is installed in the cooling system water tank. This switch is connected to DIO 1 input channel 7 labeled NO LWL (no low water level). While the engine is running, if the low water level switch opens (Low Water Condition) for 10 seconds a crew message “LOW ENGINE WATER LEVEL DETECTED” will be displayed and the alarm bell will ring for 60 seconds to alert the crew and the fault will be archived if the low water level condition is detected while the engine is shutdown. The engine will not be allowed to start and a crew message “ENGINE WILL NOT START - LOW ENGINE WATER LEVEL DETECTED” will be displayed for 60 seconds. With the exception of extended intervals, it should not be necessary to add water to a sealed, closed-loop cooling system under normal operating conditions.

COOLING SYSTEM 4-11

C L 31900

Figure 4-7 Water Tank Instruction Plate and Level Gauge

FILLING THE COOLING SYSTEM Water used in the engine cooling system should be made up and tested in accordance with the Maintenance Instruction listed on the Service Data page. CAUTION If a hot engine has been drained, allow sufficient time for cooling before refilling its cooling system. The cooling system should be filled in accordance with the following instructions:

NORMAL FILLING: Do not remove the pressure cap! Attach a hose to the filler pipe connector and hold the fill/relief valve open. Observe the water tank sight gauge. Do not overfill the system.

FILLING A DRY SYSTEM: 1. Hold the fill/relief valve open, until the system pressure is completely vented. 2. Remove the pressure cap, and fill the system through the opening. Observe the water tank sight gauge. CAUTION Do not overfill the tank. Overfilling may create a hazard to personnel.

4-12


0 3. After filling a dry, or nearly dry, system, the engine should be run with the filler cap removed, or with the fill/relief valve opened. This will eliminate air pockets in the system. After running the engine, check the water level. If necessary, add more water to the system. When the filling operation is complete, hold the fill/relief valve open, and replace the pressure cap. NOTE The low water shutdown device will normally be tripped on a drained cooling system. Therefore, after the cooling system has been filled, the low water reset button must be pressed before the engine can be started.

OBTAINING AN ENGINE WATER SAMPLE Water samples should be taken in a clean container, with the engine warm, and running. The sample should be collected from a point where the water flow is normally turbulent. Prior to taking a sample, allow the water to flow for a few seconds. This will drain off accumulated d sediment, and minimize the possibility of a contaminated sample.

DRAINING THE COOLING SYSTEM To drain the cooling system: 1. Open the manual engine drain valve located at the sump between the engine and the equipment rack. 2. Loosen pressure cap on expansion tank. Once the pressure on the system has been released, the water tank filler cap may be removed to allow faster draining.

COOLING SYSTEM 4-13

SERVICE DATA - COOLING SYSTEM ROUTINE MAINTENANCE PARTS AND EQUIPMENT PART NO. Engine Temperature Sensor ............................................................................................................... 40029233 Water Tank Pressure Cap Assembly, 20 PSI........................................................................................ 9323490 Water Tank Pressure Relief Assembly ................................................................................................. 9330855 Filler Neck Assembly........................................................................................................................... 9323491 Tank-to-Neck Gasket ........................................................................................................................... 8424925 Female Coupling .................................................................................................................................. 9321341 Male Fitting.......................................................................................................................................... 9321340

4-14


0

SECTION 5. FORCED AIR SYSTEMS INTRODUCTION This section of the Locomotive Service Manual covers the forced air systems, the components of which are located in, or connected to a compartment, Figure 5-1. This compartment is located on the locomotive behind the TCC’s (Traction Control Cabinets) and in front of the engine compartment. A partition at the rear of the TCC#2 cabinet makes up the front wall of the air compartment. The back wall is made up of a partition fitted around the main generator. There are two openings in this rear wall, one between the engine air filters and the turbocharger, and one for the auxiliary generator drive shaft. The carbody hood side, roof, and the generator pit complete the central air compartment. Ambient air is drawn into the compartment through the inertial air filters located on either side of the locomotive. Air that is drawn into the compartment is primarily used to supply a. b. c. d. e.

Combustion air for the diesel engine; Cooling air for the main generator and companion alternator; Cooling air for the traction motors Cooling air for the traction inverter equipment; Pressurization of electrical cabinets.

FORCED AIR SYSTEMS 5-1

use CA42328 + Fr view of TM Blower from F43265

Figure 5-1. Central Air System

5-2 GT46MAC Locomotive Service Manual

0

INERTIAL AIR FILTERS Two inertial air filter panels, one mounted on either side of the locomotive, are made up of a series of tubes designed to produce a cyclonic action, Figure 5-2.

F43266

Figure 5-2. Inertial Air Filter Tube. Each tube contains specially designed vanes that induce a spinning motion to the contaminated incoming air. The demands of devices that air from the central compartment create a depression within the compartment which draws outside air rapidly through the tubes. Dirt and dust particles, because they are heavier than air are thrown to the outer wall of the tube and carried to the bleed duct where it is removed by the scavenging action of the filter blower and expelled through the roof of the locomotive. The resulting clean air continues on through the smaller diameter portion of the tube and into a second tube where the air is again caused to swirl by internal vanes. The particles are carried to the bleed duct and the resulting clean air enters the central air compartment. Approximately two-thirds of the filtered air goes to the generator and traction motor blowers to provide cooling air to the generator, inverters, and motors. Supplementary use is also made of traction motor cooling air for the following purposes: 1. To provide pressure to counteract the depression in the central compartment and enable an aspirator, Figure 5-4. on page 5-7, to drain water from the generator pit. 2. To provide filtered air under pressure to the electrical cabinet.


MAIN GENERATOR BLOWER The Main Generator Blower and Traction Motor Blower share a common housing mounted on the front side of the auxiliary generator, see Figure 5-1. Although the blowers are both mounted on the auxiliary generator shaft, an internal partition separates the two blower portions. Air is drawn from the central air compartment into the generator blower (closest to the auxiliary generator) and passed through a duct to the main generator airbox. Air from the generator blower first cools the main generator rectifier banks, then passes internally through the generator and companion alternator to the engine room. This creates a slight positive pressure to keep dirt from entering the engine room. This filtered air is also used by the air compressor, reducing the load on its own filter assembly.

TRACTION MOTOR BLOWER The front blower mounted on the auxiliary generator, See Figure 5-1, supplies air for traction motor cooling, generator pit aspirator operation, main electrical cabinet pressurization and traction computer cooling. Air is drawn through a moveable inlet guide vane, through the blower, and delivered into a duct to the traction motors. A portion of this air is diverted through a set of filters for delivery to the computer module portion of traction inverter cabinets for module cooling. Another set of filters cleans the air used to pressurize the main electrical cabinet.

TRACTION MOTOR BLOWER INLET VANE OPERATION The reduction of traction motor blower load is dependent upon the request of the traction control computers (Siemens). This load reduction is accomplished by controlling the amount of air at the blower inlet. A moveable circular inlet vane acts like a shutter to limit the amount of air drawn into the blower consequently reducing the work done by the blower. The inlet vane is actuated by an air cylinder positioning the vanes to either full air or half air. It is held in the partly closed portion (half air) by air but is spring loaded to full open in case of a fault in the compressed air system. The air to the actuating cylinder is controlled by a magnet valve, MVTS. When MVTS is energized compressed air is supplied to the actuating cylinder to move the vanes to the half air position. The inlet guide vane shutter is spring loaded to the full open position. A +74 VDC signal (TMSGTR) from the computer to a magnet valve (MVTS) is required to close the guide vanes. The inlet guide vanes are closed by means of energizing the TMSHTR computer output. The inlet guide vanes are opened by means of deenergize the TMSHTR computer output.


0

NOTE

“Closing” The guide vanes does not completely shut off the traction motor cooling air supply. It results in limiting the volume of cooling air to the motors to about one half of the full air supply. POWER MODE The guide vanes are under the indirect control of the TCC computers (a.k.a. the ASG’s). They will request operation based on the throttle position, TCC temperatures, capacitor temperatures and motor stator temperatures and the LCC will drive the DIO-3 output channel 6 (THSHR) accordingly. Generally, the ASG computers never ask for the shutters to be closed unless the locomotive is in throttles 6, 7 or 8. This is due to concerns for proper cooling of TCC capacitors and other internal components. If the shutters are closed (i.e. TMSHTR in ON) and HIGH_TM_TEMPERATURE IS GREATER THAN 149°C, then the TMSHTR output is set to FALSE to open the shutters. If the hottest traction motor temperature is less than 139°C, then the TMSHTR output is set to TRUE to close the shutters.

DYNAMIC BRAKE MODE The guide vanes are to remain opened during all dynamic brake operation.

LOAD TEST MODE The guide vanes are to remain closed during all load test operation, unless open operation is requested by the TCC’s on AC locomotives.

IDLE The guide vanes are to remain closed during all idle operation, unless open operation is requested by the TCC’s.


F43267

Figure 5-3. Traction Converter Cabinet views.

TCC BLOWER The TCC cabinets mount 180° opposite each other. Air is taken from the central air compartment by the TCC electronic blower (located in the central air compartment) which is driven by an AC motor powered by the companion alternator output. This air is used for cooling and pressurizing in some (but not all) parts of the inverter cabinet. This air keeps dirt from contaminating areas containing DC Link Capacitors, Gate Units and Traction computers. Because the source is the central air compartment, the air has already been inertially filtered. In addition to this filtering, a paper filter for each cabinet located under the cabinet just below the phase modules serves to clean the supply an extra step. This air supply is not the same as that used for phase module cooling. The TCC electronics blower motor is powered as soon as there is an output from the companion alternators, assuming that the TCC Electronic Blower motor circuit breaker is closed. Air for the phase module and cabinet cooling comes directly from the ambient supply. A blower in each cabinet driven by its own 3-phase AC motor (powered by the companion alternator) draws the air in across the modules and expels it across the R 2-snubber resistor. Since the cabinets mount opposite each other, air draws in on the engineer’s side of the locomotive for TCC #1, and in on the conductor’s side for TCC#2. 5-6 GT46MAC Locomotive Service Manual

0 The initial command for blower operation comes from traction control computers. EM2000 executes the request by turning on the DIO-2 output channel 7 (TCC1SS) and DIO-2 output channel 8 (TCC2SS).

INSPECTION AND MAINTENANCE OF THE CENTRAL AIR SYSTEM COMPARTMENT INSPECTION If any leaks exist in the central air compartment, then unfiltered air will enter. This may be caused by any of the following defects: 1. 2. 3. 4.

Access panel bolts missing. Access panel gaskets or seals not properly applied. Compartment door not tightly closed. Engineroom partition and attached cover plates not properly applied and sealed. 5. Generator pit aspirator not properly connected.

ASPIRATOR INSPECTION At the intervals stipulated in the Scheduled Maintenance Program, inspect the main generator pit aspirator, Figure 5-4., as follows: 1. Check aspirator drain holes for obstructions. 2. Check that traction motor cooling air is exhausting from the aspirator tube causing venturi action at the aspirator drain holes.

F-CA30821

Figure 5-4. Generator Pit Aspirator. FORCED AIR SYSTEMS 5-7

INSPECTION OF INERTIAL FILTER (BLEED) BLOWER OPERATION The efficiency of the inertial carbody air filters will be significantly reduced if the inertial filter blower is faulty. If the blower is not operating, unfiltered air will be drawn in through the inertial filter blower exhaust stack, or if improper electrical connection is made, the blower may run backward with a resulting large drop in blower effectiveness. Either of the aforementioned conditions will cause an excessive amount of dirt to be blown into the generator and traction motor ducts. The engine filter will effectively clean the air taken in by the engine, but the added burden placed upon the engine filter may bring about the need for early filter element renewal. Proper operation of the inertial filter blower can be easily verified in the following manner. Open the filter blower motor circuit breaker mounted on the high voltage cabinet circuit breaker panel. If the engine is running, allow time for the blower to coast to a stop. Go under frame of the locomotive and observe the squirrel cage blower through the exhaust filter compartment. Have someone close the filter blower motor circuit breaker and start the engine, if not already running. As blower starts it will be possible to see which direction it turns. The blower vanes should move down, toward the observer. NOTE It is not sufficient merely to check that air is exhausting from the bleed blower duct of an already running engine. The squirrel cage blower, if running backward, exhausts air, but at a greatly reduced volume.

INSPECTION OF CARBODY INERTIAL FILTERS When dirt accumulates on the inertial filter tube vanes, the pressure drop across the filter increases, thus increasing the depression inside the filter compartment. As depression increases, the carbody inertial filter becomes less efficient, but this in itself is not critical, since the efficiency of the engine filter may not be affected. However, as filter compartment depression increases, the traction motor and generator blowers, which take their air from the compartment, will put out less cooling air. When the pressure differential between ambient and the filter compartment reaches the maximum value stipulated on the Service Data page, cooling air flow is insufficient and damage to the main generator and traction motors is possible. It is not possible to determine by a visual inspection whether the carbody filters are sufficiently clean or are plugged to the maximum allowable limit. It is possible for the filters to appear very dirty and still provide adequate filtration and adequate cooling air. If dirt on the filters is evenly distributed, it has no adverse effect upon filtration except for the resulting increased pressure drop that the cooling blowers must work against. However, if dirt is unevenly distributed, filtering efficiency can be reduced without an increase in pressure drop. It has been determined from experience that inertial filters should be removed from the locomotive and cleaned whenever compartment depression exceeds the value shown on the Service Data page.


0

ENGINE INTAKE AIR FILTERS Additional filtration is required for air used by the engine. The engine intake air filter uses a fiberglass bag filter element, Figure 5-5.

18029 at 2+1/4i

F18029

Figure 5-5. Engine Air Filter - Fiberglass Bag The engine air filter assembly is equipped with pressure switches, Figure 5-6., that sense the differential between ambient pressure and pressure at the turbocharger inlet. The switches are located inside of the electrical cabinet, and connected by tubes to the turbo inlet side of the engine air filter, and to ambient. As the filter elements become restricted a depression is created within the filter housing. When the differential between the filter housing and ambient reaches 356 mm (14 in) H2O the filter vacuum switch FVS will trip closed. FVS closing feeds a signal to the computer. The DIO-2 input channel 2 (FVS) turns on and the display message will read FILTER VACUUM SWITCH TRIPPED after the FVS has been active for some time, indicating excessive restriction of air to the engine. Filter elements should be checked at this time. Refer to Checking Air Filters And Filter Compartment.

21482 at 3+1/2i

F21482

Figure 5-6. Filter Safety Switches FORCED AIR SYSTEMS 5-9

If the filter elements become so restricted that the differential reaches 610 mm (24 in) H2O the engine filter switch EFS (located in the high voltage electrical cabinet) will trip closed. EFS closing provides a signal to the computer through DIO-2 input channel 2 (EFS) which results in reduced engine speed and load. The display message will read “ENGINE AIR FILTERS DIRTY”. If throttle is above 6, the display shows “ENGINE AIR FILTERS ARE DIRTYCHANGOUT REQUIRED, POWER MAY BE LIMITED TO THR 6.”. Engine speed will be reduced to 730 RPM (TH6) and loading will be reduced to a maximum of 1820kw (turbo off gear train) or 1550kw (turbo on gear train.) 1500 HP (1120 KW). Filters should be changed at the earliest opportunity. The fault message will remain on display until the menu program is started, and will reappear after the menu program is ended, unless the fault is corrected. The fault is archived. Hose stems located on the front of the electrical cabinet, Figure 5-7., provide a convenient place to take manometer readings of pressure drops across the inertial air filter, the engine plus inertial air filters, and the electrical cabinet filter.

29256 at 1.8i

F29256

Figure 5-7. Filter Test Hose Stems CHECKING AIR FILTERS AND FILTER COMPARTMENT Filter compartment depression may be checked when operating conditions or the appearance of the filters seem to warrant such a check. Perform the following: 1. Connect a flexible tube to the INERTIAL FILTERS hose stem, Figure 5-7. Connect the other end of the tube to a U-tube manometer. Vent other end of manometer to atmosphere. 2. Make necessary preparations to start engine. Start engine and allow it to idle until warm. With reverser handle in NEUTRAL position and GENERATOR FIELD and DCL CONTROL circuit breakers OFF (open), place throttle in RUN 8 position. Loading is not necessary. 3. If filter compartment depression is less than the minimum stipulated in the Service Data, make certain that all central air compartment panels, partitions, and cover plates are properly applied and that no air is bypassing the carbody filters.


0 4. When the filters are clean, the central air compartment depression should be near the value stipulated in the Service Data. Depression readings greater than the maximum stipulated are cause for immediate cleaning of the carbody inertial filters. NOTE If depression readings are taken on an annual basis, a reading of more than 3.5 in (89 mm) is indication that the inertial filters can be expected to plug within 12 months. 5. Connect the measuring device to the ENGINE + INERTIALS hose stem. If the reading is less than the minimum stipulated in the Service Data, and the inertial filter reading previously taken was satisfactory, the engine air filters should be checked for bypassing. Tears in the paper media, improper element seating, a loose connecting boot to the engine, and loose or broken pressure lines leading to the manometer hose stem or pressure switch are possible causes for such readings. If the reading is greater than the maximum stipulated in the Service Data, the engine air filters must be renewed. NOTE If, after lengthy service, the pressure drop remains low, similar to new (clean) filters, or is decreasing rather than increasing, the air filters should be checked for bypassing. If the inertial filter reading is near the maximum, cleaning of the inertial filters may extend the useful life of the paper filters somewhat. 6. Connect the measuring device to the ELECTRICAL CABINET hose stem. Make certain that all cabinet doors are securely latched. If static pressure is less than the minimum stipulated in the Service Data page, renew all electrical cabinet filter elements.

CLEANING THE CARBODY INERTIAL AIR FILTER The only approved and recommended method of cleaning the carbody filters is immersion in a hot detergent bath followed by a cold wash. The filters should be removed from the locomotive and cleaned if filter compartment depression exceeds the maximum value shown on the Service Data pages.

REMOVAL AND CLEANING PROCEDURE In order to facilitate inertial air filter cleaning and changeout, a spare set of filters should be available for rapid exchange with dirty filters. This practice will allow proper cleaning and maintenance of the filter assemblies without causing unnecessary delay. To remove the inertial air filter assemblies from the locomotive, perform the following: 1. At the filter compartment perform the following: A. Loosen the hose clamps and slide the rubber ducts clear of the inertial filter assemblies. B. Disconnect the dust bin drain line. C. Disconnect the blower motor electrical cable from receptacle on the partition between the dynamic brake and central air compartments.


2. Remove all bolts holding the roof of the filter compartment to the carbody structure, Figure 5-8. on page 5-12. 3. Attach an overhead crane to lifting eyes provided, and raise the roof and filter blower assembly clear of the carbody. 4. At the inertial filter assemblies, perform the following: A. B. C. D. 5.

6. 7. 8.

Disconnect inertial filter drain pipes. Remove bolts at the flanges of the filter assemblies. Slide the filter assembly inward on structural members. Attach lifting device to four lifting eyes provided and raise the filter assembly out of the filter compartment. Place the entire filter assembly in a hot caustic or detergent bath until clean. The time required for cleaning will depend upon the type of bath used, its temperature, and the condition of the filter. When the filter is removed from the caustic bath it should be given a clear wash. Dry and inspect the filter flange for cleanliness and smoothness. Inspect the gasket material on the carbody structure where it mates with the inertial filter flanges. Replace any damaged portion of the gasket with material listed in Service Data.

F-CA30822

Figure 5-8. Inertial Filter Cross Sectional View 5-12 GT46MAC Locomotive Service Manual

0 9. Brush or wash corrugated filter compartment intake screen. It is not necessary to remove this screen from the locomotive carbody at any time during inertial filter removal and washing. 10. Reinstall the cleaned filters, and reconnect the filter drain pipes. 11. Reinstall the hatch roof by performing the following: A. Inspect the gasket material on the underside of the roof where it mates with the carbody structure. Repair damaged gasket as required. See Service Data for material. B. Inspect carbody structure where it mates with the roof hatch. Make certain that it is clean and smooth. C. Position the hatch roof, and secure all roof bolts. D. Connect rubber ducts between the filter assemblies and dust bin. Make certain hoses are correctly fitted before tightening the hose clamps. E. Reconnect dust bin drain pipe. F. Reconnect blower motor plug with receptacle.

CHECK AND ADJUSTMENT OF PRESSURE DIFFERENTIAL SWITCHES Switches EFS and FVS sense pressure differential between two sources, therefore their calibration can be checked by either increasing the pressure at the “high” (atmosphere) port or by lowering the pressure at the “low” (engine air inlet) port.

Switch Trip Values Switch

Part No.

Pressure Differential At Trip

FVS

8465021

14 in +/− 2 in (356 mm +/- 51 mm)

EFS

8466230

24 in +/− 2 in (610 mm +/- 51 mm)

1. Connect a voltmeter across the NO and C terminals of switch to be tested. With battery switch and local control circuit breaker closed, voltmeter should indicate up scale. NOTE If voltmeter does not indicate up scale, recheck voltmeter connections to switch. Switch is defective if voltmeter does not indicate up scale in Step 1. 2. Connect a flexible tube to the atmospheric pressure reference port. Connect a “tee” fitting, a short piece of tubing, and a manometer as shown in Figure 5-9. on page 5-14.


F-CA33746

Figure 5-9. Testing Filter Safety Switches 3. Apply low pressure air to the short tube by blowing into it. 4. Note manometer reading when voltmeter indication goes to zero (switch closes). If manometer reading is within limits shown in Switch Trip Value chart, switch is operating normally. 5. If the switch does not operate within the +/- 2 in (+/- 51 mm) H2O limits, the switch should be adjusted to within +/- 0.5 in (+/- 13 mm) H2O limits. Turn the calibration screw, Figure 5-10., clockwise to increase the trip value, or counterclockwise to decrease the trip value.

F-CA30824

Figure 5-10. Filter Safety Switch 5-14 GT46MAC Locomotive Service Manual

0

NOTE Occasionally a filter light indication is reported, but manometer checks indicate clean filters and satisfactory switches. Such transient indications can be caused by wet filter elements or by snow plugged inertial filters.

Tests on switches may be performed with the engine running or shut down. If the tests are performed with the engine running, the slight depression produced by the engine at idle must be added to the pressure found necessary to trip the switch. Refer to Checking Air Filter And Filter Compartment portion of this section to measure air inlet pressure to engine.

CAUTION If a switch is removed from the locomotive and is to be calibrated at a bench, it is important to position the switch so that the diaphragm is in the vertical plane (which is the plane of mounting on a locomotive).


SERVICE DATA - CENTRAL AIR SYSTEM ROUTINE MAINTENANCE PARTS AND EQUIPMENT PART NO. TM Blower Compartment.......................................................................................................... 10647162 Engine Air Filter Element Fiberglass Bag Type (4 Required)............................................................................................. 8470903 Electrical Control Cabinet Air Filter (#1 and #2) Pleated Cotton - Paper Elements............................................................................................... 9330535 Fiberglass/Dacron (optional)...................................................................................................... 8402068 #3 Electrical (AC) Cabinet Air Filter Pleated Cotton - Paper Elements (1 Required) .......................................................................... 8402068 TCC Cabinets Filters.................................................................................................................. 909358

FILTER SAFETY DEVICES PART NO. Filter Vacuum Switch (FVS) 356 +/- 51 mm (14" +/- 2") H2O .............................................................................................. 8465021 Engine Filter Switch (EFS) 610 +/- 51 mm (24" +/- 2") H2O............................................................................................... 8466230

SPECIFICATIONS Inertial Filters (Central Air Compartment) Minimum Depression.............................................................................................................76 mm (3”)H2O Maximum Depression ......................................................................................................... 178 mm (7”)H2O Combination Engine Plus Inertial Minimum Depression..........................................................................................................127 mm (5”) H2O Maximum Depression ......................................................................................................... 356 mm (14”)H2O Electrical Control Cabinet Filters Minimum Static Pressure .................................................................................................... 13 mm (0.5”)H2O AC Cabinet Minimum Static Pressure .................................................................................................... 2.6 mm (0.1”)H2O


0

SECTION 6. COMPRESSED AIR SYSTEMS INTRODUCTION Compressed air is used for the locomotive brake system as well as for auxiliary systems such as sanders, bell, horn, windshield wipers, rail lube systems, and radar head air cleaner. WARNING Compressed air can be very dangerous if not handled properly by trained and qualified people. Before attempting to service any components in a compressed air system, isolate the component by closing the appropriate cut out valves. Vent any contained pressures before breaking seals or opening lines

F-CP31186 mod

Figure 6-1 WLNA9BB Air Compressor

COMPRESSED AIR SYSTEMS 6-1

WLNA9BB AIR COMPRESSOR The WLNA9BB three cylinder air compressor is a two stage (low-pressure and high-pressure) compressor. Water-cooled and shaft driven, the WLN is equipped with a shallow sump. The air compressor is mechanically driven by a driveshaft from the front or accessory end of the locomotive engine. This driveshaft is equipped with flexible couplings, which require periodic inspection and replacement. Part numbers and specifications are given at the end of this section, in “Service Data”. The compressor is equipped with its’ own internal oil pump and pressure lubricating system, as well as an oil filter. The oil level is checked running using the dipstick mounted on the side of the compressor crankcase. When adding oil, the compressor (and therefore the engine) must be shut down. At idle, with the oil at normal operating temperature, oil pressure should be between 124-149 kPa (18-25 psi). A plugged opening is provided for installation of an oil pressure gauge. The compressor is equipped with three cylinders, two low pressure and one (the center cylinder) high pressure. Air is pulled through two dry Pamic type air filters, into and compressed by the two low cylinders, and then passed through a pressure relief valve equipped intercooler to lower compressed air temperatures. After this the compressed air moves on to the high-pressure cylinder where it is compressed to main reservoir pressure.

F-13522

Figure 6-2 Pamic type compressor air filter.

6-2 GT46MAC LOCMOTIVE SERVICE MANUAL

0

AIR COMPRESSOR MAINTENANCE The compressor oil level should be checked regularly using the dipstick, and the oil level should be kept at the full mark. The compressor oil and compressor oil filter should be changed at the scheduled maintenance intervals. The compressor air filters should be changed out at the scheduled maintenance intervals. Remove the filters by first removing the nuts attached to the clamps on the filter housing. Swing the clamps to the side and remove the retainer screen. The filter housing and screen should be cleaned whenever the filter elements are change out. When the application of test gauges are required for maintenance ensure that the gauges are removed and the proper sized plug inserted and tightened before returning the locomotive to service. Air compressor change out and overhaul should be done at the scheduled maintenance intervals. For detailed rebuild instructions see the appropriate vendors’ instructions.

WARNING Although the three-cylinder air compressor is equipped with lifting eyeholes, it is not the recommended lifting procedure. The proper technique is with lifting straps of the proper rating wrapped around each exit manifold from the low-pressure cylinders If lifting eyes must be used, a spreader bar is required to minimize side loads on the eyeholes and lifting eyes.

AIR COMPRESSOR CONTROL The standard air compressor on a GT46MAC locomotive is coupled directly to the diesel engine through a driveshaft and when the engine is running, the air compressor is being driven. Therefore an unloader assembly, mounted on the compressor, is required to control when the compressor is actually pumping air. The intake or suction valves of the compressor contain unloaders that block the valve open when pneumatically activated. With the intake valves blocked open the compressor is incapable of compressing, whether it is rotated or not. These unloaders are controlled pneumatically, through the unloader magnet valve. This valve is called the MV-CC, or Magnet Valve Compressor Control. The locomotive computer, the EM2000, controls the MV-CC in turn. When the locomotive is started, the computer picks up the MV-CC, allowing main reservoir air through to activate the unloaders. When the computer, monitoring main reservoir pressure, notes that the pressure is below the required pre-programmed maximum pressure it drops out the MV-CC. This releases the unloaders causing the compressor to load.


MAIN RESERVOIR PRESSURE TRANSDUCER The EM2000 reads main reservoir air pressure from the main reservoir pressure transducer, or MRPT. This pressure is read between the number one and number two air reservoirs. The transducer itself is located inside the AC cabinet at the right rear side of the locomotive. The signal from this transducer, MR-PRESS, is sent to the EM2000. If the pressures of the main reservoirs are below 9.14 kg/cm² (130 psi) in lead, 9.49kg/cm² (135 psi) in trail, the EM2000, using the same circuit as compressor synchronization, drops out the MV-CC and activates the compressor. When the main reservoir pressure reads 9.84kg/cm² (140 psi) in lead, 10.19kg/cm² (145 psi) in trail, the EM2000 will shutoff the output signal for the CMPSYN circuit, causing the COMPSYN relay to drop out. With the COMPSYN contacts open (1 and 2 for redundancy), the CRL signal from 25T trainline and the DIO input is removed. When EM2000 sees this combination of factors, MV-CC is picked up, allowing MR air through to actuate the unloaders and prevent the compressor from loading.

MV-CC MAGNET VALVE MAINTENANCE If MV-CC magnet valves are suspect, check the position of the manual override “T” handle. When the handle is in the normal (up) position, and the valve coil is not energized, the valve should be closed. This should disable the unloaders, allowing the compressor to load. Conversely, if the “T” handle is held in the down and locked position, the compressor unloaders will be held open and prevent the compressor from loading. Ensure all pneumatic connections are tight and free of leaks. Check all electrical connections for proper contact and placement.


0

COMPRESSOR UNLOADER PANEL The MVCC itself is mounted on the compressor unloader panel. The panel is located inside the long hood, next to the AC compartment, at the right rear of the locomotive.

F-CP42612

?

Figure 6-3 Compressor unloader panel. COMPRESSOR SYNCHRONIZATION GT46MAC locomotives have a computer-controlled circuit for full compressor synchronization with any other EM2000 equipped locomotives that are trainlined. When main reservoir air pressure is below the low-pressure limit (called P LOAD), the EM2000 sends a signal out CH 14, DIO-3 which causes pick up of the compressor synchronization relay, CMPSYN. This provides a “compressor request to load” signal (CRL) to the EM2000 (CH 18, DIO-3) as well as trainline signal (25T) to activate any trailing unit compressors. In addition, CMPSYN provides the compressor synchronization relay verification input signal (CH 12, DIO-3). After a programmed period of time, the computer drops the output signal (which is CH 14, DIO-1), dropping out MV-CC. This causes the compressor to load, including when MV-CC fails. Note that when the locomotive is in trail, the input signal CRL is activated via the 25T input and the TLF. This singular input also tells the EM2000 that it is in trail and should load the compressor, providing that the MRPT setting on that particular trailing locomotive is below the low pressure limit.


F43268

Figure 6-4 Compressor synchronization circuit. When coupled to locomotives not equipped with synchronization, the CCS (Compressor Control Switch) will automatically start the compressor pumping when low main reservoir pressure is sensed.


0

MAIN RESERVOIRS To store the compressed air for use by the various systems, the locomotive has two main reservoirs (tanks) each with 492 liters (30,000 cubic inches) capacity. The reservoirs, designated number one and number two Main Reservoirs, are interconnected and furnished with various filtering and drying devices, check valves and liquid drains. Main reservoirs are equipped with safety drillings to prevent catastrophic rupture.

Figure 6-5 Main Reservoir System.


COMPRESSED AIR FILTERS AND DRAINS The compressed air system on the GT46MAC is equipped with various devices for the filtration and drying of the air produced by the compressor. These are discussed in this section.

MAIN RESERVOIR FILTERS The GT46MAC locomotive can be equipped with either 824 and 814 filters or 975 filters. In the case of the India Railways locomotive, the filters are 975 type. There are two identical filters, one for auxiliary air filtration and one for brake system filtration. Each filter has a canister type desiccant filter element inside it, which must be changed as per the scheduled maintenance instructions. The filters are also equipped with a bottom mounted drain valve.

(Illustration #6) CP37935

Figure 6-6 975 Air Filters

MAIN RESERVOIR FILTER MAINTENANCE To eliminate contaminants, open the manual drain valves at the bottom of the filter housing each day. Change the main reservoir filter elements every two years.

MAIN RESERVOIR SYSTEM SAFETY VALVE A safety valve rated at 10.6 kg/cm² (150 psi) connects to piping on the output side of the Number One Main Reservoir.


0

MAIN RESERVOIR DRAIN BLOWDOWN VALVES Number one and two reservoirs are equipped with bottom mounted Salem 580H automatic drain blowdown valve. These are used to remove condensate from the main reservoirs. The valves are normally air actuated, and operate each time the unloader valves on the compressor cycle. The airline that connects magnet valve MV-CC to the unloaders also branches off to the main reservoir drain valves. When there is air pressure in this line, (when the compressor is unloading), the drain valves actuate.

(Illus

Figure 6-7 Automatic Blowdown Valve The EBT or Electronic Blowdown Timer can also activate the drain valves. This is simply another magnet valve piped into the drain valve pneumatic control circuit. The EM2000 computer controls this magnet valve using DIO-3 output channel 3 (EBT). The blowdown valves will either operate automatically or the main reservoirs can be manually drained (using the same valves). To manually drain the main reservoirs, use the control valve on the end of the blowdown valve. Turning the handle on the valve clockwise until it stops will close the valve. Turning the valve counter clockwise until the valve stops will position the valve for automatic drain. Midway between these two positions is manually open.

MAIN RESERVOIR DRAIN BLOWDOWN VALVE MAINTENANCE

WARNING Close cutoff valve (cock) to isolate a blowdown valve or drain valve before attempting any disassembly, service or repair. Failure to cutoff air pressure to valve before starting any repair may result in injury. All valves should be regularly inspected. All main reservoirs should be manually drained on a regular basis and automatic operation confirmed. When working on standard or automatic type valves remember to use a good grade of air brake grease. COMPRESSED AIR SYSTEMS 6-9

1. Close main reservoir drain shut off valve to isolate automatic drain valve from system. 2. Remove cap, exposing disc and seat area. 3. Remove any foreign material from seat are, and from the inlet and exhaust area of the valve body. Clean the disc, seat area, and cap using a soft cloth and solvent or alcohol. 4. Reinstall the disc with the smooth side out (facing the cap), and replace the cap hand tight. Turn on the air by opening the manual drain valve, and note that the valve has resumed normal cycling. If the valve is functioning properly, torque the cap to 122 N.m (90 ftlbs.). To recondition a valve, the following procedure should be followed. NOTE It is recommended that the automatic drain valve be removed from the locomotive before reconditioning. Ensure that the main reservoir drain manual shut off valves and filter cutout valves are closed before removing the automatic drain valve.

1. Remove cap. 2. Remove and discard existing disc. 3. Clean cap and body thoroughly. Steam cleaning or an equivalent method can be used. 4. Inspect the body seat area. The seat area must be clean and free from any scratches or damage. Wear patterns should be even and polished. If not, the face can be reconditioned by lapping. A. Use a flat plate and lapping compound equal to 240 grit boron carbide (Norbide), or equivalent. B. When lapping the body seat, use a figure eight motion to maintain a square seta surface. Continue the operation until a 50-micro inch finish is achieved. Up to 0.010 inch can be removed from the body seat without affecting the operation of the valve. 5. Apply a new disc. See service data at the end of the section for the part number. 6. Reinstall cap. Torque cap to 122 N-m (90 ft-lbs.). 7. Reinstall valve on to locomotive. Charge the locomotive air system to operating pressure. Check for leaks and proper cycling of the valve.


0

FINAL AIR FILTERS The GT46 MAC is equipped with a KNORR/NYAB CCB 1.5 brake system. This system incorporates final air filters on the PCU (Pneumatic Control Unit). See the CCB 1.5 section

FINAL AIR FILTER MAINTENANCE See the KNORR/NYAB CCB 1.5 system maintenance section.

DRAINING THE COMPRESSED AIR SYSTEM DAILY

NOTE The manual drain valves for the main reservoir filters should be opened at least once a day to ensure proper operation.

GRAHAM WHITE TWIN TOWER AIR DRYER AIR DRYER CONTROL The compressed air from the air compressor contains moisture which can be detrimental to the air system components. India Railway choose to use a combination filter/air dryer to remove the condensate. The dryer has two identical “tower” elements, one which is actually drying the compressed air while the other element is being regenerated. The operation of the dryer is controlled by EM2000 computer. The computer controls the operation, the dryer is operated by DIO-3 output channel 11 (DCR) to pick up relay DCR, which energizes the dryer. When the DCR is energized, internal timing circuits in the air dryer alternate the compressed air from one tower to the other. As the regeneration process consumes compressed air, DCR is turned off to save compressed air when it is determined that no other compressed air is being used by the locomotive. The DCR relay is energized whenever the air compressor is pumping or when the engine speed is greater than 430 rpm. The DCR relay is turned off when the compressor in not pumping and the engine speed is below 420 rpm.


AIR FILTER DRYER ASSEMBLY The air filter dryer assembly on the GT46MAC is a Graham White twin tower type. The dryer cleans and dries air for use by the air brake equipment and auxiliary pneumatic devices. It connects between number one and number two reservoirs.

CP37934

Figure 6-8 Location of air dryer. The air filter assembly includes a precoalescer filter section, twin coalescer-dessicant towers, an electronic control circuit (including a timer and a relay), various valves and a pressure sensor. When the air compressor is pumping and main reservoir pressure is below 7.03 kg/cm² (100 psi), the precoalescer and both towers operate. Once main reservoir pressure is above 7.03 kg/cm² (100 psi) and the air compressor is pumping (or the throttle handle is in position three or higher), the precoalescer and only one tower at a time will function. The other tower will regenerate (dump the collected impurities). At approximately one-minute intervals, the towers will switch functions. That is, the tower that was regenerating will filter, and the tower that was filtering will regenerate. Each time the towers switch functions, the precoalescer purges itself.


0

CP37933

Figure 6-9 Air Dryer.

PRECOALESCER SECTION The precoalescer protects the filter dryer towers against contaminants (primarily oil) which can cause premature desiccant failure. The precoalescer is a cylinder containing a changeable borosilicate element. Droplets of contaminant form on the element as pressurized main reservoir air flows through it. These droplets drip down to the precoalescer sump. When the tower filters switch functions, the precoalescer drain valve is activated, purging the sump.

TWIN TOWERS Each tower consists of a two piece (upper and lower) cylinder shell, a desiccant canister, a renewable metallic coalescer element, an air operated desiccant compactor, inlet and outlet check valves, outlet solenoid valve, and an air operated electrically heated tower sump purge valve.

DEHYDRATION FUNCTION When the control circuit sets up one of the towers for dehydration, air flows into the inlet check valve near the top of the tower. From there it flows through an internal passageway that spirals downwards, circling outside the desiccant canister shell until it reaches the coalescer. This spiraling movement uses centrifugal force to drive the larger particles out and down along the tower housing, until it reaches the sump. COMPRESSED AIR SYSTEMS 6-13

The air flows through the coalescer, where the metallic mesh traps oil and other liquid contaminants. These contaminants drip from the mesh down to the sump. The air then flows upward, through the desiccant beads, which absorb humidity. The air then exits the tower, exits the dryer assembly, and flows through the silencer.

REGENERATION FUNCTION When the dryer control circuit first sets up for regeneration, both the inlet and outlet check valves are forced closed. Momentarily trapping the air in the tower. Next, the tower sump purge valve opens, and air pressure in the tower forces the collected impurities out of the sump. The sudden drop in pressure within the tower causes moisture to be released to the surface of the desiccant beads. Then, while the tower purge valve is still open, a small flow of dry air from the other tower is ducted to the top of the regenerating tower. The dry air flows down through the desiccant beads and out of the purge valve, drying off the beads.

HUMIDITY INDICATORS A humidity indicator monitors the air at each tower outlet check valve. These indicators reveal the air humidity level by means of color changes within the indicators. Blue, as seen through the sight glass, indicates dry air. Lavender indicates a deteriorating condition, and yellow/white indicate wet or contaminated air.

AIR FILTER DRYER MAINTENANCE Monthly: 1. Check condition of humidity indicators. 2. Ensure towers are cycling. 3. Ensure precoalescer drain valve and sump purge valves are functioning.

EACH 90 DAYS: 1. Check humidity indicators. Blue indicates proper functioning. White indicates unsatisfactory operation, and requires further inspection. 2. Check tower purge valves and precoalescer drain valve: A. Listen for slight, continuous air exhaust from the purge valve at one dryer tower and no air exhaust from the other dryer tower. B. Approximately one minute later, you should hear a loud, short air discharge from the second dryer tower, followed by the sound of slight, continuous air exhaust from the second dryer tower.


0 C. Approximately one-minute later steps A and B should repeat. Purge valve exhaust reversal once a minute indicates proper filter dryer assembly cycling. D. Listen to the precoalescer drain valve. It should exhaust each time that the purge valves reverse exhaust. If the filter dryer assembly does not cycle properly, if either dryer tower purge valve fails to discharge, or if the precoalescer drain valve fails to discharge: 1. Reaffirm that the main reservoir system air pressure is at least 7.38 kg/cm² (105 psi) and that the compressor is pumping. (Filter dryer assembly internal pressure switch closes at 7.03kg/cm² +/- 0.35 kg/cm² (100 psi, +/- 5). 2. If neither tower purge valve produces exhaust, connect a jumper across the pressure switch terminals. If connecting the jumper causes a short, loud exhaust noise followed by a continuous relatively quiet exhaust sound, the pressure switch is defective and should be replaced. 3. If the air dryer towers do not cycle (reverse functions) while the compressor is pumping, make sure that air is flowing into the tubing that connects the solenoid valve, the inlet check valve, and the purge valve. If air flows into the tubing at one tower and then switches to the other tower, the timing circuit is operating correctly. If no air flow is present, check the electrical connections to the dryer assembly. If the electrical connections are correct, and no air is flowing, replace the dryer assembly circuit board. 4. If actuating air is not present in the tubing between the inlet check valve and the purge valve during the regenerate cycle, check the solenoid valve electrical terminals to see if they are being energized. If the solenoid is energized, but air flow is not present in the tubing, inspect the solenoid valve plunger for proper seating. If the plunger binds in the coil, renew it. 5. Check the inlet and outlet check valves for proper seating while the tower is in regenerating mode by listening to purge valve exhaust. If the loud discharge of air does not quickly decrease to a slight discharge, check for foreign matter lodged under the inlet and/or outlet valve seat. Clean or replace the seat as required. 6. Inspect each tower while it operates in dehydrating mode. There should be no exhaust of air at the purge valve. If air is exhausting at the purge valve, the purge valve is not seating properly. It must be inspected and repaired with a new seat, seals, and packing cup. 7. Inspect the precoalescer drain valve. It should exhaust each time the dryer towers reverse functions. If the drain valve does not exhaust, inspect the actuating lines from the adjacent towers’ purge valves, and then follow steps 3 and 4 again.


8. Check the timer memory circuit by first unloading the compressor while the locomotive is running. (Locomotive should not be MU’ed for this test.) The air dryer should stop regenerating. Load the compressor. The same dryer that stopped should begin to regenerate at the same point in the cycle where it stopped. (In relation to regenerating time already expended in the cycle.)

ANNUAL MAINTENANCE Repeat the 90 day maintenance and: 1. Remove and replace the precoalescer borosilicate coalescing element. 2. Inspect the regenerating orifice and it’s operation. Do this by first pushing in the orifice plunger. If the plunger will not push in, wait for the dryer assembly to switch tower functions, and then push in the plunger. At the next tower function switch, the plunger should automatically return to the extended position. If the plunger does not return to the extended position, remove the regenerating orifice and apply maintenance kit.

BIANNUAL MAINTENANCE Repeat the 90 day maintenance and: 1. Check the humidity indicators. If they are white, inspect the desiccant beads. If the beads are contaminated with oil and water, change out the desiccant canisters. Ensure that new desiccant canister seals and gaskets are used. 2. Remove and replace the precoalescer borosilicate coalescing element.

TRIANNUAL MAINTENANCE Completely overhaul the filter dryer assembly, renewing or replacing: 3. 4. 5. 6. 7. 8. 9. 10.

All seals, gaskets and seats. Desiccant canisters. Tower purge valves. Precoalescer drain valve. Inlet and outlet check valves. Solenoid valve. Regenerating orifice. Desiccant compactor.

After reassembling the filter dryer assembly, perform the 90-day maintenance procedure to verify control circuit operation. If a malfunction occurs, replace the circuit board.


0

KNORR/NYAB AIR BRAKE SYSTEM (CCB 1.5) INTRODUCTION GT46MAC locomotives are equipped with a KNORR/NYAB CCB (Computer Controlled Braking) 1.5 system. This system is an electro-pneumatic microprocessor based system with 30A CDW type desktop controls. An overview of this system is provided in the following block diagram.

GM# GI42639

Figure 6-10 Block Diagram Of GT46MAC CCB 1.5 System. This system eliminates many of the discrete electrical and pneumatic controls and connections, thereby simplifying troubleshooting and reducing periodic maintenance. NOTE CCB 1.5 system information is presented here for reference purposes only. See system specific manual or contact NYAB representative for details.

AIR BRAKE EQUIPMENT The CCB 1.5 system on the GT46MAC is mounted on a brake rack. This is located in the short nose at the front of the locomotive, on the right side.


Figure 6-11 General Layout, showing location of brake rack.


1) Air Brake Rack 2) Engineers Control Console 3) Cab Door 4) Traction Control Cabinets 5) Inertial Air Filters 6) TCC Electronics Blower\ 7) Engine Air Filter


0 This brake rack consists of a VCU (voltage conditioning unit), CRU (computer relay unit), PCU (pneumatic control unit), regulator, and a KE valve. Inside the cab, mounted on the consoles, are the rest of the components, such as the BVC (brake valve controller), gauges, and emergency brake handles.

GM# F41967 and CT42492

Figure 6-12 Control Stand And Emergency Brake.

All air brake pressures are monitored by console mounted analog gauges, and set up functions are controlled by switches mounted to the right of the brake valve controller.


SYSTEM DESIGNATIONS AND ABBREVIATIONS AB Automatic Brake ABCB Air Brake Circuit Breaker AD Analog to Digital AE1 Automatic Emergency Switch 1 (normally closed) AE2 Automatic Emergency Switch 2 (normally open) AP Automatic Variable Handle Potentiometer AR Automatic Release Switch (normally open) AW4 – ER Analog Converter Equalizing Reservoir AW4 – 16 Analog Converter 16 Pipe AW4 – 20 Analog Converter 20 Pipe (BCEV) BAN Battery Negative BAP Battery Positive BC Brake Cylinder BCCO Brake Cylinder Cut-Out Pressure Switch BCEP Brake Cylinder Equalizing Pipe BCEV Brake Cylinder Equalizing Valve BCT Brake Cylinder Transducer BEA Binary Input Output BO1 Bail Off Switch, Automatic BO2 Bail Off Switch, Independent BP Brake Pipe BPA Brake Pipe Flow Indicator, Port 2 BPCO Brake Pipe Cut-Off Valve BPDE Brake Pipe Dead Engine BPG Brake Pipe Gauge Port BPPS Brake Pipe Pressure Switch BPT Brake Pipe Transducer BVJ1 Brake Valve External Connector 1 BVJ2 Brake Valve External Connector 2 C1 Choke C2 Choke CCB Computer Controlled Brake COC Cut-Out Cock COMM Communications CONT Controller COR Cut-Out Relay CP Central Processor CRU Computer Relay Unit DB1 Magnet Valve Driver Board DC Direct Current DCV Double Check Valve DI Diagnostic Printed Circuit Board ELV Emergency Limiting Valve EMER Emergency EPA1 Automatic Application (Equalizing Reservoir) Control Printed Ciruit Board EPA2 Control Pipe (Brake Cylinder) Control Printed Circuit Board EPA3 Direct Brake Control Printed Circuit Board ER Equalizing Reservoir ERG Equalizing Reservoir Gauge Port 6-20 GT46MAC LOCMOTIVE SERVICE MANUAL

0 ERT ES EX EXH FIG FLT FOJ1 FOJ2 FOP FOR FS Ft-lbs. FVG IB IBS ID IM I/O IPS IP IR J1 to J11 K1ES K2IBS K3BCPS K4RLIS K5COR K6SPOT K7BOBU K12VA KE KN L Lbs. mm. MIN MR MRDE MREP MRET MVBP MVEM MVER MVEREX MVLT MV16T MV20E MV20S MV20M 20T MV53 N Nm.

Equalizing Reservoir Transducer Emergency Sand Exhaust Exhaust Magnet Valve Figure Flow Transducer Automatic Fiber Optic External Connector Independent Fiber Optic External Connector Fiber Optic Fiber Optic Receiver Full Service Foot Pounds Flow Indicator, Port 1 Independent Brake Independent Brake Switch Inner Diameter Independent Maximum Applied Switch (normally open) Input/Output Iron Pipe Size Independent Variable Handle Potentiometer Independent Release Switch (normally open) Printed Circuit Board Connectors Emergency Sand Relay Extended Dynamic Range Cut-Out Relay Dynamic Brake Cut-Out Relay (spare) Rail Lubrication Relay PCR Cut-Out Relay Spotter Relay Bail Off Back Up Relay Brake Failure Alarm Relay Distributor Valve Kilo Newtons Liter Pounds Millimeter Minimum Main Reservoir Main Reservoir Dead Engine Main Reservoir Equalizing Pipe Main Reservoir Equalizing Pipe Cut-Off Transducer By-Pass Magnet Valve Magnet Valve Emergency Equalizing Reservoir Default Magnet Valve Equalizing Reservoir Default Magnet Valve Exhaust Lead-Trail Magnet Valve 16 Pipe Default Magnet Valve Independent Application & Release Exhaust Magnet Valve Independent Application & Release Supply Magnet Valve Independent Application & Release Maintaining Magnet Valve Direct Application Pipe Transducer Brake Pipe Cut-Off Magnet Valve Newtons Newtons Meters COMPRESSED AIR SYSTEMS 6-21

OD PARA PCB PCU Pg. Psig PVBIT PVBC PVBP PVEM PVERI PVLT Qty R1 R2 REL RES SC1 SC2 SS9A SS9B SUP SVJ SV2 TJB TPBC TPBP TPER TPMR TP16 TP20 V VA VCU VDC VOL 16 RES 16E 16S 16T 20CP 20F 20R 20T

Outside Diameter Paragraph Printed Circuit Board Pneumatic Control Unit Page Pounds Per Square Inch Gauge Pneumatic Break In Two Valve Pneumatic Valve Brake Cylinder By-Pass Pneumatic Valve Emergency Pilot Air Valve Equalizing Reservoir Pneumatic Interlock Lead-Trail Pneumatic Valve Quantity Resistor Resistor Release Reservoir Signal Conditioning Printed Circuit Board Signal Conditioning Printed Circuit Board Digital Input/Output Printed Circuit Board Digital Input/Output Printed Circuit board Supply Magnet Valve Computer Power Supply Computer Power Supply Transducer Jumper Board Brake Cylinder Test Port Brake Pipe Test Port Equalizing Reservoir Test Port Main Reservoir Test Port 16 Pipe Circuit Test Port 20 Pipe Circuit Test Port Volts Air Brake Alarm (Visual Alarm) Voltage Conditioning Unit Volts Direct Current Volume 16 Reservoir 16 Circuit Exhaust Magnet Valve 16 Circuit Supply Magnet Valve 16 Circuit Transducer 20 Circuit Control Portion 20 Circuit Trainline Filter 20 Circuit Relay Valve 20 Circuit Transducer


0

BRAKE VALVE CONTROLLER The automatic and independent (direct) brake system controllers, located to the right on the desktop of the consoles, are combined into a single unit called the Brake Valve Controller (BVC). Each handle is attached to a variable potentiometer that provides input signals to the CP (Central Processor) in the CCB computer. The handles are operated front to back so that the brakes are released when the handle is closest to the operator. The operating positions of the handles are detented for positive location.

CT42495

Figure 6-13 Illustration Of BVC AUTOMATIC BRAKE HANDLE The automatic brake handle controls the application and release of both the locomotive and train brakes. The brake valve functions as a pressure maintaining type, which will hold brake pipe reductions constant against normal brake pipe leakage. The brake handle operates through the following detented control positions and zones. 1. Release Position-used for fast recharge/overcharge-5.7kg/cm² (80 psi) maximum, plus 0.5 kg/cm² (7.1 psi) for overcharge 2. Run Position-normal BP release position, ER and BP at 5.2 kg/cm² (74 psi) 3. Minimum Reduction Position- minimum train brake, ER/BP reduce to 4.7 kg/cm² (67 psi) 4. Service Zone-from Minimum Reduction to Full Service 5. Full Service-maximum train brake, ER/BP reduce to 3.4 kg/cm² (48 psi) 6. Emergency Position-ER reduces to 0 kg/cm², BP reduces to less than 1 kg/cm² (14 psi)


NOTE A companion’s emergency brake valve is provided at the lower left of each console.

INDEPENDENT (DIRECT) BRAKE HANDLE The independent or direct brake is directly to the right of the automatic brake handle on the BVC. This handle provides independent control of the locomotive brakes irrespective of train braking effort. The brake function is self-lapping and will hold the brakes applied. The brake handle operates through four positions or zones. There is an additional bail off or actuate function provided by lifting a ring mounted below the handle knob. The four positions or zones are as follows: 1. Release Position- 0kg/cm² 2. Application Zone-Release position to Full Application position 3. Full Application Position-5.2 kg/cm² (74 psi). Note that BCEP pressure is 3.7 kg/cm² (53 psi). 4. Bail Or Actuate Position-vents any train brake application on MU’ed locomotives.

DEAD ENGINE CUT-OUT COCK A dead engine cut-out cock, located at the lower left corner of the Pneumatic Control Unit (PCU), is used to limit braking effort on a locomotive being hauled dead in a train. When the cutout cock is set for a dead locomotive, the pressure regulator will charge the main reservoir at 1.76 kg/cm² (25 psi). This will limit brake cylinder pressure to 1.76 kg/cm² (25 psi) as well. Note that both BCEP and MREP cut-off end cocks must be opened. Brake Pipe hoses must be connected and BP end cocks opened, and Brake Cylinder cocks must be open as well. Air Brake Circuit Breaker (ABCB) must be opened.

AIR BRAKE SET UP The micro air brake circuit breaker is wired to the load side of the locomotive battery switch, consequently the air brake system is not powered even with the battery knife switch open. The CCB system performs the same functions as a 26L-type brake system, but uses front-end electrical and electronic control instead of pneumatics. CCB is equipped with a pneumatic back-up system that operates in parallel with the computer control and is always active. Upon power up, the CCB system will not allow the operator to take control until certain brake system conditions are met. Until that time the system is strictly under pneumatic (back-up) control.


0

POWER-UP PENALTY Whenever the ABCB is first closed, the CCB system applies a penalty brake application. Brake Cylinder (BC) and Brake Cylinder Equalizing Pipe (BCEP) will be pressurized to 3.57 kg/cm² (50 psi). To recover the power up penalty, the automatic brake handle should be moved to the Full Service (FS) position. The handle must remain in this position for ten seconds (in addition to the initial thirty seconds of the penalty) to reset the system. When Brake Pipe (BP) pressure increases to 2.9 kg/cm² (41 psi), move the automatic brake handle to the Run position. This will fully recharge the BP system. The computer will not take control of the system until Brake Cylinder (BC) pressure falls to zero. This ensures that a complete penalty brake application occurs.

MULTIPLE UNIT OPERATION Setting up the locomotive for LEAD/CUT-IN, LEAD/CUT-OUT, and TRAIL, is accomplished through the three-position switch mounted on the lower right of the console.

SET UP FOR INITIAL LEAD/CUT-IN OPERATION 1. Place the automatic brake handle in Full Service (FS) position. 2. Place the independent (direct) brake handle in the Full position. 3. Close the Battery Knife switch. Ensure all breakers for normal locomotive operations are closed (computer breaker last). 4. Close the Air Brake Circuit Breaker (ABCB). The current air brake pressures and brake system status will be shown on the console gauges. Set-up air brake system for lead cut-in, using the Lead/Trail set-up switch.


Air Brake Set-up Table In absence of specific railroad instructions, the following table may be used for the most commonly encountered brake equipment operation. SERVICE

AUTOMATIC BRAKE HANDLE

INDEPENDENT BRAKE HANDLE

CUT IN/ CUTOUT

DEAD ENGINE CUTOUT COCK

LEAD OR TRAIL

SINGLE LOCOMOTIVE Leading

Release

Release

Cut In

Out

Lead

Shipping Dead in Train

Handle Off Position

Release

Cut Out

In

Lead (Open all IND and ACT end connection COC’s.)

LOCOMOTIVE IN MULTIPLE UNIT CONSIST Leading

Release

Release

Cut In

Out

Lead

Trailing

Handle Off Position

Release

Cut Out

Out

Trail

Shipping Dead in Consist w/ MU Hoses Connected & End Connection Cocks Open

Handle Off Position

Release

Cut Out

Out

Trail

Shipping Dead in Consist w/Mu Hoses Not Connected

Handle Off Position

Release

Cut Out

In

Lead (Open all IND and ACT end connections COCs.)

Figure 6-14 Brake Equipment Set-up Table.


0

POWER LOSS/PNEUMATIC BACK-UP As a loss of power to the CCB system could occur, there is a pneumatic back-up system. The following conditions will occur: power loss, air brake fail alarm on the affected unit, along with a trainlined alarm. 1. AIR BRAKE FAIL alarm, on the affected unit, along with a trainlined alarm. 2. Immediate power and dynamic brake knockdown. 3. Equalizing Reservoir reduces to zero at a service rate. 4. Brake Pipe is vented to 0.7 kg/cm² (10 psi) at a service rate. 5. Brake Cylinder pressure developed by back-up system to 3.8 kg/cm² (54 psi). 6. Trailing units will receive pressure equal to BC via the Brake Cylinder Equalizing Pipe. Note that if power cannot be restored to the brake system, the unit must be used as Trail or Dead. After power is restored, there will be another Power-up Penalty, which will have to be recovered as above (see Power-Up Penalty).

E.S.D PRECAUTIONS The CRU box protects the internal components against damage from Electro Static Discharge (ESD) damage in normal operation. During normal maintenance procedures and inspections, no special ESD precautions are necessary, provided that the covers of the system enclosure box remain closed. If welding or performing high potential testing on the locomotive, special precautions must be taken. See the section on “Protecting Sensitive Equipment When Welding Or High Potential Testing”. If it becomes necessary to open the cover of the CRU, or to remove any electrical portion of the system, use a wrist strap as described under “How To Use Electrostatic Discharge Systems”. All power must be shut off when working on any electrical air brake systems, and care should be taken not to physically damage any components or the housing itself.


CCB FINAL FILTER MAINTENANCE The CCB system is equipped with two different types of air filters. These are mounted on the Pneumatic Control Unit (PCU), and consist of one MR filter (mounted on the rear of the PCU) and three identical filters for BCEP, MREP, and BP (mounted on the front of the PCU). All main reservoir air for the PCU flows through the MR filter. The filter is a canister type with an internal element, which must be replaced as per the scheduled maintenance requirements. To remove the MR filter from the PCU manifold and change the filter element: 1. Remove the two hex head screws, lock washers and flat washers holding the assembly to the PCU manifold. 2. Remove the filter assembly from the PCU manifold. 3. Remove and discard the two “O”ring gaskets from the filter assembly. 4. Secure the filter head in a vise and use an oil filter wrench or similar tool to unscrew the housing from the head. 5. Unscrew the locknut from the rod and remove the retainer. 6. Remove and discard the filter element from the filter assembly. 7. Install new filter element into filter assembly 8. Reverse process. 9. Replace all “O”rings with new, remembering to lubricate lightly before reinstallation. 10. Torque mounting hex head screws to 40.7 Nm. +/- 4.07 Nm. (30 +/3 ft.lbs.) – dry torque. Note that the automatic drain valve inside the filter assembly should not be removed unless it is defective. The other types of filters on the PCU are LF-19-T filters. There are three of them, all of which are identical. The LF-19-T filters are designed to be removed, disassembled, cleaned, and reapplied during maintenance. To remove LF-19T filters from PCU manifold and disassemble:

1. Remove the two mounting hex nuts. 2. Remove filter from manifold. 3. Remove and discard the two “O”rings from filter assembly. 4. Remove retaining ring and cover from filter housing. 5. Remove and discard “O”ring from housing. 6-28 GT46MAC LOCMOTIVE SERVICE MANUAL

0 6. Remove the spring, support ring, and filter from housing. 7. Wash all parts in suitable solvent. (i.e. mineral spirits) 8. Blow dry parts with clean, dry, compressed air. 9. Replace any components that are worn or damaged. 10. Lubricate all “O”rings with number two silicone grease before assembly 11. Insert cleaned filter, support ring, and new spring into housing. 12. Insert new, lubricated cover “O”ring into housing. 13. Insert cover and retaining ring into housing. 14. Install new housing “O”rings before remounting filter assembly to PCU manifold. 15. Reinstall hex nuts and torque to 16.3 Nm. +/- 1.4 Nm. (12 +/- 1 ft.lbs.) - dry torque.

92 DAY MAINTENANCE Inspect air brake system equipment and perform functional brake test. Drain moisture from all reservoirs. Replace any damaged components.

ANNUAL MAINTENANCE Perform 92 day maintenance and; clean and replace all CCB air filters as per previous instructions.

5 YEAR MAINTENANCE Overhaul brake controller (pneumatic portion only) as per NYAB instructions. Overhaul PCU as per NYAB instructions.


SANDING SYSTEM Sanding on the locomotive is controlled in two ways. Either manually by the operator, or automatically by the control system. Technically, however, both methods are actually controlled by the EM2000 computer. When activated by manual switches, a sanding request signal is sent to the computer, which then initiates the sanding process. In automatic mode, the request comes from the traction or braking systems. The sanding process itself, remains the same for either option. The exception to this is when an emergency braking sequence is initiated. Under those circumstances sanding is initiated by the brake system, but the control signals still work through the EM2000.

GM# CP39988

Figure 6-15 Sand Magnet Valves. Gravity feeds sand from the sand reservoirs to the sand traps. Energizing a sanding magnet valve causes it to open, sending compressed air through a pair of sand traps. Air flowing through a sand trap picks up sand as it passes through. The air/sand mixture exits the trap through the attached sand hose, and blows down onto the rail.

GM # F31173

Figure 6-16 Sand Traps.


0 Manual Sanding is cutout when the locomotive is operating in power/wheel creep mode, and moving at speeds above 19.4 km/h (12 mph). If a wheel creep equipped locomotive is MU’ed in consist with an older EMD locomotive, a trainlined signal will initiate sand on the older units.

MANUAL SANDING The locomotive operator initiates sanding by operating one of the non-latching sanding switches mounted on the consoles. This will apply sand to the leading axle (wheelset) on each truck depending on locomotive direction.

Manual Sanding Switch

GM # F41970

Figure 6-17 Manual Sanding Switch. When the sand switch is closed, a signal is sent to the DIO module on the computer. The computer responds by energizing the correct magnet valves and turning on the sand indicator light on the consoles. As well, the computer will energize the 23T trainline to cause sanding on any trailing units. Note that while manual sanding is available in dynamic braking at all speeds, when motoring at speeds above 19.4 km/h (12 mph) or in Super series mode manual sanding is cutout on this locomotive.

AUTOMATIC SANDING The locomotive computer initiates automatic sanding when it detects that sand is required to maintain or increase wheel to rail adhesion. Such automatic sanding may occur when in controlled wheel creep operation. The computer also uses automatic sanding to correct undesirable wheel slip during initial start up from a standstill, and if wheel slip occurs when Super Series is disabled. In addition, the computer will use automatic sanding to correct wheel slide when in dynamic braking. As when the manual SAND switch is operated, the computer automatically energizes the sanding magnet valves appropriate to the direction of locomotive travel. Automatic sanding is inoperative if the generator field contactor GFC is de-energized. COMPRESSED AIR SYSTEMS 6-31

EMERGENCY SANDING Emergency brake applications and brake pipe breaks (break in two) will cause brake pipe pressure to drop quickly. The air brake system’s computer monitors this time frame/pressure drop. The CP (Central Processor) in the CCB (Computer Controlled Braking) system will command a relay to energize, and this signal will energize the ESS (Emergency Sanding Switch). At the same time, a signal will be forwarded to the EM2000 locomotive computer, which will then initiate the sanding process. In the case of emergency sanding the computer will also control the time duration of sanding (60 seconds). For more detailed information of the interaction of the CCB system and emergency sanding, see the CCB section.

SANDING SYSTEM MAINTENANCE EMD recommends checking the manual sanding system before each trip. With the locomotive set-up for power operation, and the diesel engine idling, proceed as follows: 1. Set the reverser handle in FORWARD or REVERSE. 2. Operate the SAND switch. Unit should sand the rails in front (or behind) of each truck, as determined by the reverser setting. Sand light should illuminate at operator’s console. 3. Release the SAND switch. Sanding should cease. 4. Move the reverser to the opposite setting. Sanding should switch to opposite end of locomotive. Sand light should illuminate at operator’s console.

MAGNET VALVE MAINTENANCE There are two sanding magnet valves at each end of the locomotive. Of the two magnet valves on one end of the unit, one controls forward direction sanding and one controls reverse direction sanding. Each magnet valve controls two sand traps at one end of the truck, one on each side.


0

Figure 6-18 Sand Magnet Valves. If faulty magnet valve operation is suspected, make sure all electrical connections are tight. Ensure air line are not leaking. Each valve is equipped with cleanout jets. To operate the jets, push in the plungers located on each side of the valve. The plungers reset automatically at the beginning of the sanding cycle. If further service is required, remove the valve and replace with a qualified rebuilt or new valve.

SAND TRAP MAINTENANCE Eight sand traps are on the locomotive. A pair of sand traps is provided for each side of each truck. One trap in each pair sands at the leading end of the truck and one at the trailing end.

GM # 13573

Figure 6-19 Sand Trap. Gravity feeds sand from the sandbox to the sand shutoff at the top of the sand trap. Unless the sand shutoff is closed, sand fills the cavity in the trap and spills into the horizontal passage in the sand delivery flange.


.

GM # CP 35663 and 13988

Figure 6-20 Sand Trap Details. The setting of the sand control paddle controls the rate at which the sand spills into the passage. If sand is not removed from the horizontal passage, it stops flowing there. Pressurized actuating air from the sanding magnet valve enters the trap and blows through the horizontal passage where it mixes with the sand. The air/sand mixture exits the trap assembly and flows down to the rail through the trap outlet pipe, the sander hose, and the sander nozzle. Sand exiting the trap is replaced by sand flowing into the top of the trap. A sand shutoff is provided for cutting out a particular sand line, or to enable maintenance work on a sand trap. Setting the shutoff lever OPEN opens the shutoff, admitting sand into the trap. The shutoff lever CLOSED position is approximately 45° counter clockwise from the vertical. Raised letters on the body casting of the trap assembly indicates both settings. Setting the shutoff lever in the CLOSED position closes the shutoff, blocking sand entry into the sand trap, but not preventing sand already in the trap from blowing out. CAUTION Before performing any work on a sand trap, set the shutoff lever to the CLOSED position. Condensation may cause moisture in the trap. To clean out the trap, remove the pipe plug in the bottom of the trap casting, using the provided handle. For more thorough cleaning, also remove the outlet flange and pipe. After cleaning reinstall the pipe plug and outlet flange. The trap sand delivery is set at 425 to 567 grams (15 to 20 oz.) per minute at the factory. 6-34 GT46MAC LOCMOTIVE SERVICE MANUAL

0

MISCELLANEOUS COMPRESSED AIR EQUIPMENT THE RAIL LUBE SYSTEM The GT46 MAC locomotive is equipped with a TSM rail lube system. The control of this system is the EM2000 computer. There is a magnet valve mounted on the unloader panel for compressed air supply for the rail lube system. For more information see the Rail Lube System section.

WINDSHIELD WIPER ASSEMBLIES Wiper assemblies are provided for each windshield in front and behind the operator’s consoles. Each windshield wiper assembly is driven by an air operated motor and controlled by individual hand operated air valve. The air motor assemblies consist of four moving parts, including a rack and pinion power train and simple internal valving with reversal provided by pneumatic mechanical action. Valve parts are of a material that is very durable and resists the effects of contamination. Therefore, very little maintenance is required. If a windshield wiper motor is not operating correctly, make sure that the air connections to the motor are tight and that they do not leak. If necessary, remove the air connections to inspect for signs of foreign particles that may have settled on air motor valve seats. If such is not the case, disassemble the motor further to check for broken or jammed components, or plugged air ports. Check the air motor internal air flow by removing the air connections and valve chamber, then blowing out the ports. Also, blow into the exhaust port to ensure it is not plugged. If the motor still doesn’t work properly, replace it with a new or qualified motor. To remove the wiper connecting arm from the air motor shaft, remove the acorn nut from the end of the shaft and pull the connecting arm off the splined shaft. When reassembling the connecting arm to the shaft, be careful not to over tighten the acorn nut. The wiper assemblies are designed to operate at a maximum speed of 60 to 80 cycles (120 to 160 strokes) per minute.


AIR HORN The locomotive operator, through a switch-activated circuit that energizes the MV-AH magnet valve controls the air horn. There are two controls for the air horn on the GT46MAC locomotive, one on each operator’s console. To inspect and clean an air horn diaphragm, remove the back cover bolts, the back cover, the diaphragm ring screws, the diaphragm ring, and finally, the diaphragm itself. Whenever removing an air horn back cover, blow out the air lines and clean out the orifice dowel pin. This can be done by fully opening the air horn valve while the air line to the valve is at full operating pressure (with the air horn back cover removed).

MAGNET VALVE RADAR BLOWDOWN To assist in keeping the locomotive radar transceiver clean during less than optimum conditions, the radar wipe system automatically and periodically blasts the transceiver faceplate with compressed air.

GM # CP38171

Figure 6-21 Radar Head Transceiver The system consists of an air supply line from the main reservoir, radar blowdown magnet valve (MV-RB), and a pipe assembly that aims the air blast at the radar face plate. The computer sends an output signal (RADBLW, on DIO-3 output channel 18) to the MV-RB, energizing the magnet valve which allows compressed air to pass through to the pipe assembly. Compressed air will blow on the faceplate for 2.6 seconds out of every 25 seconds, providing all of the following conditions are met: a. b. c. d.

Diesel engine is running The reverser handle is not in neutral The LOCAL CONTROL circuit breaker is closed The locomotive computer is powered up, battery knife switch is closed, and COMPUTER CONTROL breaker is closed.


0

MAGNET VALVE TRACTION MOTOR BLOWER On the GT46MAC locomotive, the traction motor blower is equipped with an air-actuated cylinder. This cylinder controls (through a linkage) a circular inlet vane assembly. The inlet Guide vane is spring loaded to the full open position. MVTS needs to be energized to partially close the shutters. Even if EM2000 controls MVTS through DIO-3 output channel 6 (TMSHR), the request for shutter operation comes from the Traction Control Computers TCCs which monitors traction motor temperature. When hottest traction motor temperature is less than 139°C, shutters are partially closed. When hottest traction motor temperature is greater than 149°C, the shutters are fully open. Restricting unnecessary cooling air reduces the mechanical load on the traction motor blower, thus improving fuel economy and increasing traction motor blower life.

GM # CA30825

Figure 6-22 Traction Motor Blower. COMPRESSED AIR SYSTEMS 6-37

See “Forced Air Systems” for more information. To check linkage adjustment, all the following conditions must apply: 1. There is a 1/32” gap between the restrained vane and the full open stop block. (See TM Blower illustration, part A.) Measure this at the closest point between the block and the vane. 2. A threaded rod length of at least 3/8 “ must be screwed into the ball joint barrel. Check this by measuring the length of exposed threads on the rod. There should be no more than 5/8” of thread exposed below the jam nut. (See TM Blower illustration, part B.) 3. The ball joint bolts at the ends of the rod should be wrench tight into the air cylinder plunger and actuator arm nut. 4. The jam nut should be wrench tight against the barrel. 5. The restrained vane does not hit the half-flow stop block during operation. To adjust the linkage: 1. Tighten the ball joint bolts into the actuating arm nut and air cylinder plunger (hold the plunger fixed). 2. Back off the jam nut on the rod, and turn the rod to get the vanes away from the full open stop block. 3. By using a feeler gauge in your left hand and turning the rod with your right hand, adjust the gap so that there is 1/32” clearance at the tightest spot. (See part A of TM Blower illustration.) 4. With the feeler gauge still in place, use a wrench to tighten the jam nut against the barrel. Do not allow the rod to move when tightening the nut because the vane will move closer to the block. 5. Now check for proper thread engagement. There should not be more than 5/8” thread showing. If there is less than 5/8” tread showing, proceed to step 9. If there is more than 5/8” thread showing, proceed to step 6. 6. While holding the plunger fixed, remove the ball joint from the cylinder plunger. 7. Add another nut to that ball joint bolt, and tighten it up against the collar. 8. Replace the bolt and nut in the plunger, tighten, then repeat steps 2 through 4. 9. Recheck gap with feeler gauge.


0

Insert CP42608 11 x 17

Figure 6-23 Piping Schematic.



0

SERVICE DATA – COMPRESSED AIR SYSTEM ROUTINE MAINTENANCE PARTS AND EQUIPMENT PART NO. AIR COMPRESSOR: .....................................................................WLNA9BB Air Filter Element .................................................................................... Pamic Oil Filter Element ................................................................................ 9311037 MAIN RESERVOIR FILTER.............................................................. 9559346 Filter Element .................................................................................... 40028168 Seal, Sump Bowl................................................................................ 10530737 AIR FILTER DRYER (Twin Tower) ................................................. 10629715 Desicant Recharge Kit ....................................................................... 10520364 Self Actuating Drain Valve ................................................................ 10569213 Drain Valve Repair Kit ...................................................................... 10565990 Coalescar Element Kit ....................................................................... 10565991 Inlet Check Valve Repair Kit ............................................................. 10520365

SPECIFICATIONS AIR COMPRESSOR LUBE OIL

NOTE Compressor lube oil must be SAE 30 weight turbine type oil containing anti-rust, anti-oxidation, and anti-foam inhibitors and should possess the following properties: Viscosity-Saybolt Universal (ASTM D88 or D2161) @ 38°C (100°F) seconds – 130 to 180 @ 99°C (210°F) seconds – 42 to 45

Pour Point (ASTM D97 Degrees Minimum) - -18°C (0°F) Rust Distilled Water (ASTM D665) – No Rust

DEAD ENGINE PRESSURE REGULATOR Set @ - 172 +/- 10 kPa (25 +/- 1.5 psi)



0

SECTION 7. HTSC BOGIE INTRODUCTION The GT46MAC locomotive is equipped with an HTSC (High Tensile Steel Cast) truck or bogie. This truck/bogie assembly supports the weight of the locomotive and provides the means for transmission of power to the rails. Unlike conventional rigid trucks/bogies, in which axles are held in parallel with each other, the HTSC truck/bogie is designed as a powered "bolsterless" unit. Although the bogie or truck frame itself is rigid, the design allows the end axles to move or "yaw" within the frame. This movement will allow the wheels to position themselves tangent to the rails on curves for reduced wheel and rail wear. Traction loads are transmitted from the truck or bogie to the locomotive underframe through the carbody pivot pin assembly. The truck/bogie is designed for extended maintenance intervals with lateral thrust pads and plates at the journal bearings and brake rigging being the only friction wearing components on the truck/bogie requiring periodic replacement. At truck/bogie overhaul suspension shock absorbers are replaced and linkage bushings are inspected for reuse or replacement. The trucks/bogies are equipped with three AC power traction motors. The traditional rubber suspension spring "nose packs" on the motors are replaced with nose link assemblies (dogbones) that increase ease of disassembly and lowering of traction motor/wheel sets for maintenance.

HTSC BOGIE 7-1

FTR43208

Figure 7-1 HTSC Truck/Bogie. 7-2


0 These three traction motors in each truck/bogie convert the electrical energy into locomotive tractive effort. The motors are geared to the driving axles, which in turn apply rotational force to the rail through the wheels. The driving force is transmitted to the bogie frame through tractive rods attached to the journal bearing adapter and the frame. From the truck/bogie frame the driving force is transmitted to the locomotive carbody through the carbody pivot pin. The unsprung weight of the locomotive carbody is transferred directly to the truck/bogie frame through four rubber "compression" spring assemblies. These four spring assemblies are located at corner positions formed on the truck/bogie where the side beams and cross beams intersect, thus providing the yaw stiffness for tracking stability. These relatively stiff secondary spring suspension limits weight transfer between axles during adhesion as all traction motor nose positions are on the same side of each axle within the truck/bogie frame. (All the traction motors are arranged within a truck/bogie in one direction, providing good motor accessibility and adhesion characteristics.) The soft primary suspension, made up of twelve single coil journal springs (two at each journal), is designed to provide ride quality and equalization of wheelset loads for operation over track irregularities. Shock absorbers are used between the truck/bogie frame and locomotive underframe to damp the lateral movements of the bogie for stability at higher road speeds. The truck/bogie frame is equipped with lateral stops at the center axle position to limit the lateral movement between it and the locomotive underframe. Vertical stop clearance is established between the truck/bogie frame and the underframe at 15.9 +/- mm (0.62" +/- 0.12") using shims under the four rubber compression springs and at locations inward of the lateral stops at the center axle position. All shims are tack welded in place. There are also "safety" links installed by these lateral stop locations on each side of the center axle between the truck/bogie frame and the locomotive underframe.

HTSC BOGIE 7-3

F43281

Figure 7-2 Lateral Shock Absorbers And Safety Links.

7-4


0 These safety links serve to prevent separation of the truck/bogie assembly from the locomotive in case of derailment and to provide a means of lifting the truck/bogie assembly along with the carbody. The journal bearing adapters transmit the vertical load from the springs to the axles. Rubber deflection pads on the adapters and nylon wear plates on the frame control the lateral thrust loads of the axles within the truck/bogie frame. These pads and wear plates are renewable and provide the means by which the lateral clearances can be maintained within limits. These limits are 15.9 mm (0.62") for the center axles and 10.4 mm (0.37") for the end axles. Air brake cylinders and brake rigging mounted on the truck/bogie are used to apply retarding forces to the wheels to slow and stop the locomotive. A single shoe system is used which provides a single composition type brake shoe at each wheel.

F43280

Figure 7-3 Brake Cylinder Mounting.

HTSC BOGIE 7-5

fTR43221

Figure 7-4 Brake Rigging.

7-6


0

ROUTINE MAINTENANCE AND INSPECTION The following paragraphs contain information necessary for performing routine truck/bogie maintenance adjustments, and inspection while the locomotive is trucked/bogied.

LUBRICATION Periodic lubrication of the truck/bogie is not required. However, depending on the type of traction motor gear and axle assemblies used, the following lubrication schedule can be followed;

ROLLER SUPPORT BEARINGS (BTR), GREASE LUBRICATED: 375,000km (250,00 miles) or at wheel change, whichever comes first.

OIL LUBRICATED GEARCASE: 46 days or as required by locomotive service demands. In addition, the brake slack adjusters should be checked at every inspection, and if found to be dry and/or dirty should be cleaned and lubricated.

fTR43220

Figure 7-5 Carbody pivot pin Nylon bushing halves.

The carbody pivot pin assembly is another item that requires regular inspection. The pivot pin assembly is lined with two Nylon bushing halves. The pivot pin is to be sprayed with a bonded type spray lubricant any time the truck/bogie is overhauled or the locomotive carbody is lifted from the truck/bogie. No additional oil, lubricant, or grease is required during normal operational service.

HTSC BOGIE 7-7

FTR42793

Figure 7-6 Carbody pivot pin, safety links, compression springs, and secondary yaw dampers. Note that special care should be taken with the rubber deflection pads on the journal adapters, the Nylon wear plates on the truck/bogie frame and the brake levers, and the rubber compression spring assemblies in order to keep them as free from oil or grease contamination as possible.

TRUCK/BOGIE CLEANING Truck/bogie assemblies should be cleaned periodically to eliminate any accumulations of oil, sand, dust, dirt, etc. Any buildup of these contaminants will increase wear as well as detract from the appearance of the assembly. There are two methods of cleaning are suggested. The first method is used when the truck/bogie assemblies are still in position under the locomotive. The second method is used when facilities are available for removing the truck/bogie from the locomotive and it is disassembled.

UNDER LOCOMOTIVE: When using this method, run the engine to supply pressurized air to the traction motors. Air discharged from the traction motors will help to prevent overspray from entering and contaminating the motors. Using water and an alkaline solution cleaner, spray the truck/bogie. Be careful to direct the spray away from the traction motor openings to avoid wetting them.

7-8


0 Let the cleaning solution remain on the truck/bogie for 10 to 15 minutes. Then, using steam and the alkaline solution in a mixing gun, thoroughly spay the truck/bogie assembly. Again, be careful of the traction motor openings. Rinse the truck/bogie with hot water as required.

TANK IMMERSION: When the truck/bogie assembly is removed from the locomotive, the traction motors (including wheels, gears and axles), journal bearing adapters, rubber compression springs, shock absorbers (all types), brake cylinders, and all the Nylon or rubber deflection, snubbing, wear plates, bushings, or pads should be removed before immersion. Again the preferred cleaning agent is an alkaline solution. Once all damageable components are removed, the truck/bogie assembly may be immersed in the cleaning solution. Allow sufficient time for removal of all foreign material and then remove the assembly and rinse with hot water. Brake slack adjuster rods and tubes as well as brake lever connection joints should be immediately lubricated to prevent seizing.

TRUCK/BOGIE FRAME The truck/bogie frame is a one-piece high tensile steel casting (Hence the acronym, HTSC). It has been designed to hold all the major components of the truck/bogie assembly. During inspection; check for loose or broken equipment and integrity of components. Inspect all truck/bogie frame members for cracks or breaks. Check all worn areas. Worn spots can be repaired by building up the effected area with weld and then grinding the area back to its original form.

VERTICAL STOP CLEARANCE The vertical stop surfaces on the side of the truck/bogie frame are designed to mate with similar surfaces (vertical stops or shims) on the tack welded beneath the carbody underframe. Clearance is provided between the bogie vertical stops and the carbody underframe vertical stops (shims0 during normal operation. These stops are designed to prevent the excessive tilting or leaning of the locomotive. These stops are not designed to carry a continuous load. The vertical stop clearances are (on a new assembly); 16 mm +/- 3.2 mm (0.62" +/- 0.12").

HTSC BOGIE 7-9

F43269

Figure 7-7 Vertical Stop Clearances. CARBODY PIVOT ASSEMBLY Vertical stop wear that is close to the limit can be an indication of wear at the carbody pivot assembly Nylon wear ring and pin bushing halves. This can also indicate relaxation of the rubber compression spring assemblies. The condition of the wear ring and pin bushing halves should be checked whenever accessible and replaced if worn excessively or damaged.

7-10


0

Figure 7-8 Carbody pivot pin and bushings. JOURNAL BEARINGS The GT46MAC locomotive is equipped with cartridge type grease lubricated journal bearings. These cartridge type bearings are self-contained, preassembled, pre-adjusted, pre-lubricated, and completely sealed. The bearings are applied and/or removed without exposing the bearing elements, seats, or lubricant to contamination or damage.

HTSC BOGIE 7-11

F29102

Figure 7-9 Journal Bearing (Partial exploded view). The bearing element assembly is pressed on the axle as a completely sealed unit. It is retained on the axle by one end cap, which in turn is secured to the axle by three cap screws and a locking plate. A journal bearing adapter is used to locate the bearing assembly within the truck/bogie frame. The bearing adapter uses a full bore housing which must be clean and free of any dust, dirt, metal chips, and foreign material which could otherwise interfere with the proper seating of the bearing within the adapter.

F43270

Figure 7-10 Journal Bearing Adapter Assembly. The adapter serves to position the journal springs between the truck/bogie frame and the axle to transmit the vertical loads. It also provides the means to position and control the axle laterally within the frame, as well as longitudinal control through the attached traction rod.

7-12


0 Roller bearings should be given a visual inspection for the following; •

Signs of overheating

•

Excessive lubricant leakage

•

Broken, loose, or missing parts (such as loose cap screws, etc)

•

Loose or defective seals

•

Cracked or broken cups, end caps, or adapters, etc

If a seal can be removed with a suitable probe, the bearing must be removed from the axle for inspection and possible repair. Under normal operating conditions, running temperatures of approximately 56° C (100° F) may be expected. In this range simply placing a bare hand on the journal adapter can check the temperature. If the bare hand cannot be kept on the adapter for more than a few seconds, and if the bearing feels noticeably warmer than other bearings on the locomotive, the bearing should be checked further. This is accomplished by checking the outside face of the adapter with a temperature indicating crayon of 93° C (200° F) or with a direct reading pyrometer. If the bearing temperature is in excess of these figures, the bearing should be removed from service for closer examination. In the event that one or more bearing end plate retaining cap screws are found loose or missing, the wheel, gear, axle and journal adapter should be removed form the truck/bogie assembly. The bearing should then be removed from the axle and a full inspection made to determine the cause and possible damage. A small amount of bearing grease leakage around the seals may be expected during an initial run-in period. This leakage will eventually be reduced to a more normal "weeping". However, if a bearing appears to be leaking excessively, check for loose or damaged seals. Distorted, cracked, or damaged end caps should be replaced, and the damaged end caps should be scrapped. When locomotives equipped with cartridge type roller bearings are placed in storage, the hand brake should be set or the wheels should be chocked to prevent movement. It is not necessary to periodically move the locomotive to distribute the lubricant over the bearing surfaces as with older types.

HTSC BOGIE 7-13

AXLE LATERAL THRUST CLEARANCE Each journal bearing adapter assembly, when installed on the end of an axle in the truck/bogie assembly, has a bracket section (or lug) that is positioned in (engages) a spring pocket of the truck/bogie frame.

F43271

Figure 7-11 Journal bearing adapter spring and pocket. A rubber deflection pad is bolted to the bracket and a corresponding Nylon wear plate is mounted in the spring pocket

F43272

Figure 7-12 Axle lateral thrust clearance, wear plate and deflection pad shown. 7-14


0 The renewable rubber deflection pads and Nylon wear plates provide for control of the axle lateral thrust clearance. Clearance limits between these lateral wear surfaces are such that in normal operation, the clearance will not exceed the maximum limits in the scheduled period between truck/bogie reconditioning. The maximum limits are 7.87 mm (0.31") per side on the middle axles and 4.75 mm (0.187") per side on the end axles. If the clearances are beyond the maximum limits at any time, the wear plates and deflection must be replaced. If wear plates are to be reused, they must be given a visual inspection for possible cracks or excessive wear. The clearance between the deflection pads and Nylon wear plates can be measured using feeler gauges. These feeler gauges should be approximately 25.4 mm (1.00") wide and 305 mm (12.00") long. When using these feeler gauges, make sure that they are inserted adequately into the clearance at the wearing area, so that as true a reading as possible is obtained.

NOTE No attempt should be made to shift the journal bearings from the position they are in when the locomotive is stopped, and the weight of the locomotive is supported by the bearings.

HELICAL COIL SPRINGS Locomotive truck/bogie frame to axle journal primary suspension is provided by steel helical coil springs. Single coils are used that provide for large amounts of deflection. This assists in wheel load equalization, and improves ride quality over rough sections of track. It also aids in allowing yaw movement of the traction motor/axle wheel assemblies within the truck/bogie. Helical coil springs are specifically designed for various weight ranges, and provide the optimum suspension system for each range of locomotive weights. Periodically the coil springs should be thoroughly inspected for signs of fatigue or degradation, as follows; Inspect the coils for breaks or surface cracks. Springs with any indication of surface cracks should be scrapped. Check for any surface nicks. Deep sharp surface nicks can cause failure of a spring and their presence should be cause for rejection. Hand wash or shot blast the coil to remove any surface rust. "Pickling" of the spring is to be avoided. If the cleaning operation removes all indication of surface rust, and does not reveal any corrosion pitting, the spring is acceptable for requalification. If any corrosion pitting is visible after cleaning, scrap the affected coil. Smooth any worn spots on the coil, which were caused by rubbing. Do not condemn a coil for these. However it must still pass the other qualification criteria.

HTSC BOGIE 7-15

COIL SPRING SEATS In order to secure the coil springs on the journal spring adapters, spring pilot tubes are used along with pilot wear plates between the springs and the adapter. Spring pilot pins and shims are also located in the truck/bogie frame spring pockets to perform the same function.

Figure 7-13 Spring Pilot Tubes And Pins. The pilot plates and shims are chosen to maintain the 434.8-mm (17.12") installed spring length. These, along with the shims used between the underframe and the rubber compression secondary springs, serve to maintain the proper locomotive height for clearance from the rail to the underframe. As well, this will maintain the proper coupler height and distribute equal axle loads.

WHEEL AND AXLE INSPECTION Wheels should be inspected for any visible defects before and/or after each trip. Wheels are periodically checked for wear, sharp flanges, shelling, cracks, and flat spots to see that they are within limits. Use the following guidelines when determining wheel and axle condition; • Minimum wheel diameter after last truing operation. • Maximum diameter mismatch of two wheels on a common axle. • Maximum diameter mismatch between wheels on one axle compared to those of any other axle. This includes wheels on the same truck/bogie as well as wheels on whole locomotive. • Minimum rim thickness, as specified by railroad or government regulation. • Axle longitudinal limits. • Circumferential defects on or below the axle surface. • Axle runout.

7-16


0

SHOCK ABSORBERS The GT46MAC truck/bogie is equipped with vertical primary shock absorbers and lateral secondary shock absorbers for high-speed operation. Partial failure of locomotive shock absorbers is a comparative rarity. Normally, when one fails there is no resistance to movement in compression or rebound. A simple manual test will usually detect these failures. If a shock absorber is new or has not been used (in storage, for example) for some time, it must be cycled to obtain consistent motion before being checked for control. Resistance developed during testing is proportional to the velocity of the test stroke. In other words, the harder and faster the shock is cycled, the more it will resist movement. Shock absorbers contain a reserve of hydraulic oil, and allow seepage to lubricate the shock's piston rod. A light film of oil is normal and is not a cause for rejection. However, as the remaining oil in the shock cannot be ascertained, any heavy leakage is cause for replacement of the shock. Periodic inspection and maintenance of shock absorbers is required. Use the following easily performed Periodic Checks and Manual Qualification procedures. Perform the following at wheel truing or when loss of damping action is suspected;

PERIODIC CHECKS Check for leaking fluid. Make sure that oil has not been deposited from some other source. Check the shock absorber per the Manual Qualification procedures before condemning. Inspect bushing integrity. Bushings should not permit gross vertical or lateral movements of the shock absorber.

NOTE If a failed vertical primary shock absorber is detected, inspect the journal springs, lateral thrust pads, and wear plates at each journal bearing adapter. If a failed lateral secondary shock absorber is detected, check the same items as noted for a failed vertical primary shock absorber, as well as the carbody pivot assembly and rod assembly bearings and bushings. In addition, check the four rubber secondary spring assemblies.

HTSC BOGIE 7-17

MANUAL QUALIFICATION PROCEDURES

NOTE Shocks, which are found to be reusable, should never be disassembled using a flame-cutting device. The high temperatures will damage the bushings. GO/NO GO TEST: This is a quick and easy test that can be performed without completely removing the shock absorber from the locomotive. One end of the shock absorber is unbolted and the shock is cycled manually. If there is resistance to the force applied in both compression and rebound, the shock absorber is acceptable. If control is gone in either direction, replace the shock with a new or qualified shock absorber. If there is any indication of internal looseness, replace the shock regardless of control condition.

NOTE .Vertical shock absorbers must be tested in the normal vertical position. Precautions must be taken to avoid damaging the shock absorber bushings during the testing or during wheel maintenance (whenever the shocks are partially disconnected or removed). For standard bolt mount shock absorbers, the upper mounting bolts must be loosened before the shock is tilted away from the journal bearing adapter bracket. Tilting the shock without providing enough free movement by loosening will result in damage to the bushing. Shocks using bar mounting or Huck bolt fasteners must not be tilted or rotated under any circumstances. If necessary, the entire shock absorber should be removed during testing or maintenance. Use the following steps to qualify vertical (primary) shock absorbers; Unbolt the shock absorber from the journal bearing adapter bracket. Loosen the upper mounting bolt. Manually stroke the shock absorber while retaining the normal vertical position. Renew the shock absorber as required. If the shock tests acceptably, reapply the mounting bolts and torque to 366 Nm (270 ft-lbs.). Lateral shock absorbers are used to provide stability during higher speed locomotive operation. The shock absorbers are similar in appearance to vertical shock absorbers, however they are not interchangeable.

NOTE Each lateral or vertical shock absorber has a label mark "L" or "V". This further identifies them for lateral or vertical operation. Vertical and lateral shock absorbers also differ significantly in size. Use the following steps to qualify lateral (secondary) shock absorbers; Disconnect the outer end of the shock assembly only. 7-18


0 Manually stroke or cycle the shock absorber. The same qualification conditions apply as with vertical shock absorbers. Replace the lateral shock as required. Torque the mounting bolts to 366 Nm (270 ft-lbs.). Inspect the lateral shock absorber mounting brackets on the underframe for fatigue cracks at the welds. If any cracks are present, rework the brackets to a full 13-mm (0.50") weld as specified for this application.

MANUAL COMPARISON TEST A wall-mounted fixture has been designed to test and compare used shock absorbers with new shock absorbers of the same type. A torque wrench is used with the fixture. Work Sketch # 41089 is available upon request from any EMD regional office. A shock absorber tested in this fixture can be reused if the torque reading at the same stroke velocity is 75% of the reading for a new shock absorber.

BRAKE RIGGING Inspect the brake rigging to ensure that the brake pins, bushings, levers, and brake shoes are reusable. The wear surfaces of the brake rigging are equipped with replaceable hardened bushings, pins, and bolts. Any of these connecting parts that are worn more than 1.6 mm (0.06") from new should have both parts replaced. Never use an old pin with a new bushing or the reverse. Cylinder levers and brake levers that are slightly bent can be reused, provided that they are restored to their original shape without damage. Bolts and nuts that are not subject to wear can be reused if they are not damaged, but cotter pins should always be replaced with new. To adjust pin type slack adjusters, unlock the pin retaining lever and remove the pin. Move the rod assembly in or out until the brake shoes clear the wheels by at least 15.9 mm (0.62") with single wheel slack adjusters, and between 19.1 mm (0.75"0 to 31.8 mm (1.25") total clearance for two wheel slack adjusters. Align the pinholes in the rod and tube or bracket assemblies and reinstall the pin. Turn the pin retaining lever to the locked position. Brake cylinder piston travel should be set between a minimum of 50.8-mm (2.00") to a maximum of 165.1 mm (6.50").

HTSC BOGIE 7-19

FTR43222

Figure 7-14 Brake slack adjusters.

BRAKE SHOE GUIDES Brake shoe guides are provided on the underside of the truck/bogie frame at each brake lever location. Each brake lever is equipped with a steel stabilizing bar. A 19.04-mm (0.75") steel wear plate is attached to each brake lever, which mates to the steel stabilizing bar. Each live brake lever uses a guide bracket that straddles the stabilizing bar to maintain brake shoe to wheel alignment. A "U" shaped bracket that straddles the lever pivot bracket near the top of the truck/bogie frame affords the same function. The stabilizing bars are bolted to brackets under the truck/bogie frame. The wear plates should be replaced when the thickness is half of the original thickness, or 9.52-mm (0.375"). Transverse alignment of the stabilizing bars should be checked periodically and maintained as per original measurements.

7-20


0

fTR43223

Figure 7-15 Brake Shoe Guides.

HTSC BOGIE 7-21

TRACTION MOTORS The GT46MAC truck/bogie is equipped with three alternating current (AC) traction motors.

FTR43216

Figure 7-16 AC traction motor.

7-22


0 Each traction motor is hung on an axle-wheel set. The power from the traction motor is directly transmitted to the axle-wheel set through a pinion and axle (bull) gear assembly. A gear case protects the pinion and axle gears from contaminants and contains the gear lubricant.

FTR43217

Figure 7-17 Typical axle-wheel set.

HTSC BOGIE 7-23

GEAR CASES The gear case is mounted to the traction motor, thereby becoming an integral part of the traction motor assembly.

FTR43218

Figure 7-18 Gear Case Assembly. The case is made up of two close fitting halves with seals to provide a complete oil tight enclosure. The lower half of the gear case is equipped with access plugs or caps to fill and/or drain the lubricant. When a gear case is removed from the traction motor/axle-wheelset assembly, the case should be thoroughly cleaned and the old seals or sealing material removed completely and discarded. Seal retainers and all parting lines should be free of dirt, gasket sealing compound, or any foreign material. Always visually inspect the case halves for damage such as cracks, perforations, or deformities. Reapply gear case halves using new seals and/or sealing compound.

7-24


0

GEAR CASE MOUNTING PROCEDURE 1) Prepare gear cases for application by thoroughly cleaning interior and exterior of all foreign material such as dirt, oil, or old sealing material. Ensure that all traces of oil have been removed from all gear case sealing surfaces and mating motor seals. 2) Install breather pipe (if removed) into top case half, using Loc-tite thread sealing compound. Install filter and vent cap to breather pipe. 3) Wipe all seal surfaces on the gear case halves and the motor/axle assembly with a lint free cloth to remove any oil residue. Apply three continuous ¼" diameter beads of RTV sealant to the motor and axle assembly adjacent to the seal tongues. 4) Apply ¼" diameter sealant beads at each of the half bores in both the top and bottom case halves. Note that these beads are always applied outboard of the tongue or groove. 5) Apply a 1/8" diameter bead of sealant on either the upper or lower case parting line flange segment. Form the beads continuously and surround each hole with a ring of sealant. 6) Install lower case half to motor and apply hand tight two 1-1/8-7 bolts and washers with Thread-Tex. Install upper half onto motor and apply 3/8-16 parting line bolts. 7) Torque parting line bolts to 35 ft/lbs. Torque 1-1/8-7 bolts to 990 ft/lbs. 8) Place motor assembly in normal operating position. Ensure drain plug is secure. Add lubricating oil through fill plug on side of lower case half. Fill to level inside elbow. 9) Verify gearcase lubricating oil level when motor/axle assembly is applied to locomotive.

HTSC BOGIE 7-25

TRACTION MOTOR REMOVAL Whenever a traction motor-wheelset assembly needs to be removed, the following basic procedures should be used: Support the weight of the traction motor-wheelset assembly with an appropriate hydraulic jack or lifting device. Disconnect the nose link rod (dogbone) from the traction motor at the lower connection. If Huck bolts were used in the original assembly, they will have to be cut off using a cutting torch (burned off), or Huck collar splitter.

CAUTION Use care when removing any Huck bolts with a torch in order to avoid damage to the surrounding truck/bogie frame, linkages, and bushings.

F43282

Figure 7-19 Traction Motor Nose Link and Huck Bolt Assembly Remove the retainer bar from the bottom of the journal bearing adapter. Disconnect all electrical cables and any other hardware attached to the motorwheelset or truck/bogie frame that could interfere with the removal. This includes, but is not limited to, the wheel flange lubrication nozzles and the sanding nozzles. Undo the brake slack adjusters and back the brake shoes away from the wheels. In some instances, complete removal of the brake shoes may be required. Secure all cables and hardware in a manner, which places them safely out of the way of the removal process. Pull the nose link (dogbone) away from the traction motor-wheelset assembly. 7-26


0 Lift the locomotive or lower the drop table, rolling the traction motor in a manner that will disengage the motor assembly from the truck/bogie frame limit stops. Move the motor-wheelset out from beneath the locomotive.

NOTE If new Huck bolts are not available for reassembly of the nose link, they may be replaced by 38.1 mm (1.5") diameter bolts torqued to 814 Nm (600 ft-lbs.). Replace the traction motor-wheelset under the locomotive. Reconnect all hardware and lower the locomotive or raise the drop table. Readjust the brake slack adjusters.

TRUCK/BOGIE REMOVAL The truck/bogie assemblies may be removed from the locomotive by using an overhead crane or jacks to raise the locomotive. Alternatively, a drop table of sufficient capacity to handle one entire truck/bogie assembly may be for removal. The bogie safety links must be removed before any attempt can be made to separate a truck/bogie assembly from the locomotive underframe. Two of the safety links are bolted to the underframe and the truck/bogie immediately above the center axle position on either side of the locomotive. Unbolt and remove the pivot pin lock plate and wear ring. Remove all other physical connections between the truck/bogie and the underframe; including the air brake connections, the handbrake chain, sanding hoses and flange lube system connections, cables from the traction motors, and any speed recorder or axle generator connections. Secure all cables, hoses, and all other hardware in a manner, which places them safely out of the way during the truck/bogie removal. Unbolt and remove the two lateral shock absorbers attached between the truck/bogie and the underframe. Their removal is suggested in order to prevent damage to the end bushings or hydraulic mechanisms. This could occur if the shock absorbers were left hanging with one end unsupported.

NOTE When lifting or jacking a locomotive to remove one or both truck/bogie assemblies, all four corners of the unit should be raised equally to a height which will permit end removal (roll out) of the complete truck/bogie assembly. The locomotive should be supported on solid blocking located under the center sills near the jacking pads, if it is to held in a raised position for any length of time. Reinstallation of the truck/bogie assembly is simply reversal of the removal process.

HTSC BOGIE 7-27

TR42792

Figure 7-20 Safety Link Location.

7-28


0

F43273

Figure 7-21 Carbody Pivot Pin

F43274

Figure 7-22 Pivot Pin and Socket

HTSC BOGIE 7-29

WHEEL FLANGE LUBRICATING SYSTEM INTRODUCTION TO FLANGE LUBE SYSTEM Rail lubrication systems are designed to reduce friction between the locomotive’s wheel flanges and the rails by applying a controlled amount of lubricant to the “throat” area of selected wheels during locomotive operation under conditions appropriate for its use. The GT46MAC units #11001 to 11013 are equipped with a TSM rail lubrication system entirely controlled by the locomotive computer EM2000. This system uses a grease/oil type lubricant - propelled, and atomized by the locomotive’s compressed air system.

SYSTEM OPERATION The TSM rail lubrication system consists of 3 major components 1. A reservoir (tank), located in the rear (long hood) end of the locomotive, contains the lubricant supply. The TSM system utilizes a lubricant reservoir which is pressurized by air from the main reservoir. 2. Lubricant spray nozzles (2) are mounted adjacent to (and aimed at) the flange “throat” area of the appropriate wheels. Locomotive compressed air is used to operate (trigger) the nozzles on the systems, and is used as a lubricant propellant (atomizer). 3. Metering valves and solenoid(s) are used on the system to control the flow of air and lubricant to the nozzles upon receiving electrical signals from the EM2000. Each shot of air through the lube valves to the nozzles allows a predetermined amount of lubricant to shot at the wheel flange. The rail lubrication system is now being controlled by the EM2000, thus eliminating the need and cost of a TSM system controller box. The electrical components of the system are MV-PUMP, MV N0ZF and MV N0ZR. The computer controls these magnet valve using DIO3 output channels 11, 12 and 13. EM2000 will turn on the appropriate output channels RLN0Z 1 (Rail Nozzle Forward) or RLN0Z2 (Rail Nozzle Reverse) every 0.2 seconds every 122 meters (400 feet) if locomotive speed is above 8.1Km/h (5 M.p.h.) and there is no brake application or sand application. To pressurize the lubricant, the computer turns on the output channel (RL PUMP) every10 nozzle spray “shots” so that main reservoir air pressurizes the lubricant. A system self test can be performed using EM2000 display - Select SELF-TEST on the main menu, then flange lube selftest. Follow the instructions shown on the display.

7-30


0

NOTE Flange Lubrication is provided during power operation only. EM2000 turns off the system while in braking or super series operation. To fire the nozzles at the proper times and rates, and to stop the nozzles from firing at inappropriate times, the computer receives and processes the following information : •

• •

A directional (reverser) signal is needed to determine the direction of travel (forward or reverse), AND; A speed signal is needed to determine the firing rate, AND; Inhibit signals are needed to stop (interrupt) the system when application of lubricant would be inappropriate.

The inhibit signals are: -Brake cylinder pressure is higher than 138 Kpa (20psi) -Main reservoir pressure is lower than 69 Kpa (10psi) -Wheel creep operation -Sanding Operation -Dynamic braking operation -Locomotive speed under 8.1Km/h (5 MPH)

HTSC BOGIE 7-31

MAINTENANCE REFILLING RAIL LUBRICATION SYSTEM The TSM rail lube system supply reservoir (tank), may be refilled (recharged) as follows: 1. Turn handles of the ball valves (cutout cocks) at the air control panel (2) and at the lube outlet assembly on the tank (1) to the OFF (closed) position (handles perpendicular to the lines). 2. Remove dust caps from the quick disconnect fittings on the lube tank (one near the top and the other at the lube outlet assembly at the bottom). 3. Connect vent hose (with 3/8" quick disconnect fitting) to the quick disconnect fitting at the top of the tank. Open small vent on top of the lubricant drum and run the 3/8" vent hose from the tank to the drum. 4. Connect pump hose (with 1/2" quick disconnect fitting) to the quick disconnect fitting on the lube outlet assembly at the bottom of the tank.

CAUTION Relieve pressure in the lubricant supply hose before connecting it to the quick disconnect fitting on the tank. Air supply pressure to the lube supply pump must be limited to keep the pump OUTLET pressure below 1 379 kPa (200 psig). 5. Start and run the lube pump. 6. When the lubricant begins to come out of the vent hose from the tank to the drum, stop the pump.

CAUTION Relieve the pressure from the lubricant supply hose before disconnecting it from the quick disconnect fitting on the tank. 7. Disconnect the lubricant supply hose. 8. Disconnect the vent hose from the tank and from the drum. 9. Replace the dust caps on the quick disconnect fittings at the top of the tank and at the lube outlet at the bottom. 10. Turn handles of the ball valves (cutout cocks) at the air control panel (2) and at the lube outlet assembly (1) to the ON (open) position (handles parallel to the lines).

QUALIFYING RAIL LUBRICATION SYSTEM Electro-Motive recommends qualifying a rail lubrication system at intervals stipulated in the Scheduled Maintenance Program or whenever system malfunctioning is suspected.

CAUTION Do NOT high potential (hi-pot) or continuity test TSM system electrical components with a test light as equipment damage could result. Use meter only for all electrical tests. Refer to for electrical qualification procedures.

7-32


0

QUALIFICATION TEST PREPARATIONS : NOTE: Start locomotive as described in Engine Starting section.

1. Apply locomotive handbrake. 2. Assure that there is an adequate supply of lubricant in the lubricant reservoir (tank). (Refer to See “REFILLING RAIL LUBRICATION SYSTEM” on page 32. for refilling procedures.) 3. Release the air brakes, and assure that no penalty application exists. 4. Close battery knife switch and computer control circuit breaker. 5. Check to be certain the WHEEL FLANGE LUBE circuit breaker on the main circuit breaker panel is in the ON (up) position.

6. Place throttle/ dynamic brake handle in the IDLE position. NOTE The engine does not have to be running to conduct these tests. However, if engine is running, be certain throttle is in the IDLE position. 7. Place directional (reverser) handle in the FORWARD position. 8. Check main reservoir air pressure which should be at least 689.5 kPa (100 psi) in order to conduct the test. 9. Check to be certain all hose connections are tight (air and lube). Tighten any loose connections before proceeding.

WARNING System air lines are pressurized at main reservoir pressure or 689.5 to 1 034 kPa (100 to 150 psi) and lubricant lines at 124 to 138 kPa (18 to 20 psi). Tests run with any loose hose connections can result in injury to personnel. 10. Open ball valve (cutout cock) in air supply line to air control panel (handle parallel to line). 11. Open air distribution ball valve (cutout cock) on air control panel (handle parallel to line). 12. Assure that lube tank pressure on control panel gauge is in the range of 110 to 138 kPa (16 to 20 psi). If the pressure is above or below this range, check pressure regulator setting on the air control panel and readjust as necessary. (Tank is filled with lubricant - before it is pressurized with air. 13. Open ball valve (cutout cock) on lube outlet assembly at base of lubricant reservoir (tank). Handle should be parallel with lube pipe when open.

NOTE Do NOT disconnect the lube hoses or pipes in order to purge air from the lube distribution system. Disconnecting the lines may cause intermittent or faulty operation of the system due to changes in back pressure to the meter valve. Repeated actuation of the Wheel Flange Lube Test on the display unit may be used to purge the lubricant distribution lines, if necessary.

HTSC BOGIE 7-33

Flange Lube Priming /Test: In order to be able to prime or test the wheel flange lubrication system, a display driven self-test feature is provided. From the display self test menu select “FLANGE LUBE’. The entry conditions to the test are: The locomotive is not moving and the reverser handle is not centered. Once the conditions are fulfilled and the start command is activated the following events occur. A. A time delay of 20 seconds permit the operator to exit the locomotive to observe nozzle operation. B. The appropriate nozzle output channel is operated for 10 cycles with an “ON” time of 0.2 seconds and an “OFF” time of 1.0 seconds C. If appropriate, the RL PUMP output channel will be energized for 0.4 seconds by the computer. Testing of the opposite direction wheel flange lubrication is done by changing reverser handle position and operating the test from the display a second time.

7-34


0

LU33741

Figure 7-23 TSM System Rail Lube Tank & Components (Schematic Diagram)

HTSC BOGIE 7-35

CP32979 at 5i

Figure 7-24 Desired Lubricant Pattern To test the nozzle functions, perform the following: Note: The EM2000 display provides a flange lube self test which is helpful for verifying functionality and proper aiming of nozzles 1. Wipe the wheels clean in the area of the nozzles, then start the selftest on the EM2000. System should cycle 8 to 10 times, spraying lubricant on the wheels. 2. Observe the location of the lubricant on the wheel(s), which should be at the “throat” of the flange, as shown in Figure 7-24. 3. If the lubricant pattern is not correct, re-aim the nozzle(s) in accordance with Figure 7-25, “Typical Nozzle Aim Adjustment” on page 7-37 and the following instructions: 4. Wipe the lubricant from the wheels and nozzles. 5. Loosen all of the adjusting bolts. 6. Place the aim gauge in the flange throat as shown. 7. Slide the bracket snugly up against the aim gauge and tighten all of the adjusting bolts.

7-36


0

CP32980 at 5i

Figure 7-25 Typical Nozzle Aim Adjustment

HTSC BOGIE 7-37

SERVICE DATA - HTSC BOGIE ROUTINE MAINTENANCE EQUIPMENT DESCRIPTION Lifting fixture traction motor, axle and wheel assembly File Drawing No. 288* Wall mounted fixture to test shock absorbers Work Sketch No.41089*

NOTE File drawings and work sketches are available from the EMD Service Department. These drawings include construction details of tooling that can be manufactured. *NOTE: File drawings and work sketches are available from the EMD Service Department. These drawings include construction details of tooling that can be manufactured.

PART NUMBERS For part numbers for all components referenced in this section, see the appropriate EMD parts manual.

7-38


0

SECTION 8. ELECTRICAL EQUIPMENT INTRODUCTION This section describes electrical equipment used on GT46MAC locomotives. Changes to the locomotive that occur after this manual is printed may be covered in later editions or revisions. This section is organized, in a general way, according to power generation and distribution through the locomotive. The equipment is presented with an initial emphasis on larger (major) assemblies. Moving through the section, larger assemblies are broken down into smaller assemblies or devices, and the focus on operation becomes more specific. Electrical cabinets are listed by location, starting from the front of the locomotive. Refer to Figure 8-1, and Figure 0-1, Figure 0-2 and Figure 0-3 in the General Information section at the beginning of this manual.

ELECTRICAL EQUIPMENT 8-1

Figure 8-1 Location of Major Electrical Assemblies

8-2


1) Air Brake Rack 2) Engineers Control Console 3) Cab Door 4) Traction Control Cabinets 5) Inertial Air Filters 6) TCC Electronics Blower\ 7) Engine Air Filter


0

MAIN GENERATOR A diesel electric locomotive uses a main generator to convert the mechanical power developed by the diesel engine into electrical power. This main generator, Figure 8-2, is a three phase alternator equipped with two independent and interwoven sets of stator windings and a rotating field common to the windings.

NOTE In order to provide a higher main generator output voltage, both halves of the generator are permanently connected in series.

Figure 8-2 TA-17/CA6B Main Generator The output from the series connected windings is supplied to two air cooled rectifier assemblies in an airbox that is an integral part of the main generator. The rectifier assemblies consist of high current, high voltage silicon diodes in threephase, full wave rectifier circuits. The circuits have delta connected resistors and capacitors for suppression of commutation transients, and are provided with fuses for automatic isolation of failed diodes. Each fuse has a spring loaded indicator that protrudes when a diode failure causes the fuse to blow. Windows for fuse inspection are located in the airbox. The main generator is an assembly made up of the main generating device and its excitation source; the companion alternator. These air cooled, 3-phase, electrically independent generators are mechanically coupled on the same shaft. The companion alternator will be discussed later in this section and the major components of the main generator are shown in Figure 8-4 on page 8-5.


The main generator consists of 10 field poles and the required stator windings for generating three phase AC power. The AC power is rectified by two banks of air cooled silicon diodes that are an integral part of the TA-17-CA6B main generator assembly. The resulting DC power is applied to the DC link circuit.

Figure 8-3 Locomotive Power Distribution Diagram

8-4


0

F17533 F21452 F20824

Figure 8-4 Main Generator Assemblies: Rotor, Stator, Rectifier Banks.

The operating principle of the TA-17-CA6B main generator is illustrated in Figure 8-2. Direct current from silicon controlled rectifier assembly SCR is applied to the rotating field through a pair of slip rings. The magnetic lines of force developed by the rotating field induce voltage in the stationary stator windings as the rotor turns.

EE30831

Figure 8-5 Main Generator Pictorial Diagram


One three phase group of armature windings and a three phase waveform are shown in Figure 8-5. There are ten groups of these “wye” connected armature windings distributed around the circumference of the stator. Five of the groups are connected to the left bank of rectifiers and the other fivegroups are connected to the right bank of rectifiers .

EE37954

Figure 8-6 Main Generator Physical Schematic (Viewed Facing Slip Ring End) 8-6


0 A separate positive and negative bus is provided for each bank of rectifiers. A simplified schematic diagram of the stator windings, bridge rectifiers, and DC buses is provided in Figure 8-7

EE37955

Figure 8-7 Main Generator Electrical Schematic ELECTRICAL EQUIPMENT 8-7

Figure 8-8 illustrates rotor pole position at an instant called “V”. Pole position is with respect to a single stator winding group. By applying the right-hand rule for generators, current flow in the stator windings can be determined, and conditions existing at a given point of time determined. Note that the phase A winding is centered over the poles (point of greatest flux density) and is at negative potential. Note also that the potential at phase C is decreasing while the potential at phase B is increasing. At the moment depicted, the potentials at C and B are equal and positive. Therefore, current at equal potential flows to the rectifier bridge, and two diodes at the positive side of the bridge conduct. Total current then flows through the load and from there through a single diode back to the phase A winding, which is at negative potential.Generator potential can also be observed at the waveform in Figure 8-8.

EC35560

Figure 8-8 Main Generator Current Flow At Instant V 8-8


0 At instant “W”, Figure 8-9, the alternator rotor has turned nominally 20 electrical degrees. Phase A is still negative, but of decreasing potential. Phase B is now more positive than phase C. The change in potential has turned off the phase C diode, and no current flows in the phase C winding. Total current at potential slightly greater than that at instant “V” now flows out of phase B winding, through the load and back to the phase A winding which is still negative.

EE30834

Figure 8-9 Main Generator Current Flow At Instant W


At instant “X” in Figure 8-10, the alternator rotor has turned about 60 electrical degrees. Phase C and Phase A are at equal negative potential, and phase B is at positive potential. The direction of current flow in the C winding has reversed, and since potentials at the negative side of the rectifier bridge are equal, both the phase A and phase C diodes conduct. Total winding current at potential equal to that at instant “V” now flows out of phase B winding through the load and back through two diodes at the negative side of the rectifier bridge.

EE30835

Figure 8-10 Main Generator Current Flow At Instant X

8-10


0 At instant “Y” Figure 8-11 the alternator rotor has turned about 100 electrical degrees. Phase C is now more negative than phase A. The change in potential has turned off the phase A diode at the negative side of the bridge, and no current flows in the phase A winding. Total current at potential slightly greater than that at instant “V” now flows out of phase B winding, through the load, and back to phase C winding which is negative.

Figure 8-11 Main Generator Current Flow At Instant Y


In Figure 8-12, the alternator rotor has turned 120 degrees. Phases A and B are at equal positive potential, and phase C is negative. Since potentials at the positive side of the rectifier bridge are equal, both the phase A and B diodes conduct. Total winding current at potential equal to that at instant “V” now flows out of the phase A and B windings, through the load, and back through the phase C diode at the negative side of the bridge.

EE30837

Figure 8-12 Main Generator Current Flow At Instant Z

8-12


0

COMMUTATION TRANSIENT VOLTAGE SUPPRESSION During commutation voltage transients are produced. The action of diodes switching from a conducting to a blocking state in the TA-17-CA6B generator is called commutation. During commutation high reverse current flows in the diodes for a few microseconds, after which time the value of reverse current flow in the diode suddenly drops to almost zero. The rate at which current flow changes from a high value to almost zero, multiplied by circuit inductance determines the magnitude of the transient voltage spike. If this transient voltage exceeds the reverse rating of the diode, the diode will immediately fail. The TA-17-CA6B generator is provided with a system for capacitive storage of energy from circuit inductance during commutation. The system is called the commutation transient voltage suppression system. It utilizes a total of six 2 microfarad capacitors and six 5 ohm resistors. The resistors and capacitors are connected in delta fashion, Figure 8-13, between the “A,” “B,” and “C” phase paralleling bars on both left and right banks of the generator.

Figure 8-13 Delta Connected Suppression Circuit


COMPANION ALTERNATOR The companion alternator is physically connected to but electrically independent of the traction alternator. The companion alternator rotor (rotating field) is excited by low voltage current from the auxiliary generator through a pair of slip rings adjacent to the slip rings for the main generator. The 3 phases AC output of the companion alternator comes from the stationary armature (stator). There are no controls in the companion alternator excitation circuit, thus it will be excited and developing power whenever the diesel engine is running. Output voltage will vary with speed of rotation, alternator temperature, and load. The companion alternator, Figure 8-14, is a variable frequency, variable voltage, three phase, wye connected AC generator with a rating of 250 KVA at 0.8 power factor. Nominal output is 230 volts at 120 cycles per second when the diesel engine is rotating at a speed of 900 RPM. The companion alternator/main generator rotating assembly is directly coupled to the crankshaft of the diesel engine The companion alternator provides power for the inertial filter blower motor, radiator blower motors, traction inverter blower motors, TCC electronics blower, excitation for the main generator, and for various control circuits.

F27969

Figure 8-14 Companion Alternator

The maximum output of the companion alternator is approximately 19 amperes for each ampere of field excitation. The auxiliary generator provides approximately 31 amperes of field excitation current to the companion alternator when the field is hot. The 31 amperes of field excitation current is determined by dividing the nominal output voltage of the auxiliary generator (74 volts) by the nominal hot resistance of the companion alternator field (2.40 ohms). The companion alternator can provide an output of approximately 600 amperes with the 31 amperes of field excitation.

8-14


0

AC AUXILIARY GENERATOR The AC auxiliary generator, Figure 8-15, consists of a three-phase pilot exciter assembly and a three-phase AC auxiliary generator field and armature assembly.

Figure 8-15 Auxiliary Generator

The nominal output rating of the AC auxiliary generator is 18 kW at 55 VAC. The three-phase 55 VAC output is used to power the 2 GTO power supplies and the computer panel mounted module FCD (Firing Control Driver) and is also applied to a full-wave three-phase rectifier assembly to obtain 74 VDC output for battery charging, companion alternator excitation, and low voltage DC control power. The three-phase pilot exciter assembly consists of a stationary field, a rotating armature, and a rotating rectifier assembly. The AC auxiliary generator has a rotating field and a stationary armature. The pilot exciter rotating armature and rotating rectifier assembly and the AC auxiliary generator rotating field are installed on a common shaft. During start up, residual magnetism of the pilot exciter stationary field induces voltage in the pilot exciter rotating armature. This AC voltage is rectified by the pilot exciter rotating rectifier assembly and applied to the AC auxiliary generator rotating field. This rotating field induces voltage in the AC auxiliary generator stationary armature. The small AC output voltage of the auxiliary generator is applied to the DVR (Digital Voltage Regulator Module). This low AC signal is used by DVR to determine if the Aux. Generator does turn. If it does, DVR will allow current from the batteries to flow in the exciter field of the Aux. Generator in order to produce the 3 phases 55 VAC output required. A description of the DVR (Digital Voltage Regulator Module) is provided in Section 9.


Figure 8-16 Auxiliary Generator Cross Section

8-16


0

C1-8: DC LINK INVERTER INPUT CAPACITORS These eight capacitors are used to filter the DC link voltage before it is applied to the traction inverters. The TCC cabinet, Figure 8-17, contains eight (8) 550 microfarad capacitors totalling 4400 microfarads, rated at a nominal 2600 VDC.

F73276

Figure 8-17 DC Link Capacitors


DCL123, DCL456: DC LINK SWITCHGEAR These motor driven not-ganged switches separately connect the DC link to the two traction inverters. Refer to Figure 8-18

F43277

Figure 8-18 DC Link Switchgear

TRACTION MOTORS Electrical power from the inverters is distributed to traction motors mounted in the trucks. Each motor, Figure 8-19, is geared to a pair of wheels with the gear ratio (90:17) selected for the intended service.

F32793

Figure 8-19 AC Traction Motor

8-18


0

The motors are cooled by means of an external blower attached to the Auxiliary Generator and directly driven by the diesel engine. 3 phase AC motors for traction provide the high starting torque required for locomotive service. Each traction motor is equipped with a TM armature speed probe and a TM stator temperature probe. Both probes give feedback information to TCC computers. Refer to Section 9 for AC motor operation.

NOTE Motor direction is changed by reversing the phase rotation (two phases) of the 3 phase AC input voltage. In dynamic braking, the traction motor energy is converted back into DC by the traction inverters (TCC1,TCC2) and applied to the DC link. The energy in the DC link is then applied to the brake grids (resistors). The maximum continuous tractive effort rating of the traction motors is applicable only when operating at throttle No. 8 engine speed. This rating decreases as engine speed and cooling air is decreased.

RADIATOR COOLING FAN MOTORS These motors, Figure 8-20, are of the inverted squirrel cage induction type and are an integral part of the cooling fan assembly. The term “inverted” indicates that they differ from the conventional squirrel cage motor in that the rotor is located outside of the stator.

F15369

Figure 8-20 Radiator Fan Motor Two 52” cooling fans (8 blades), which operate independently, are located in the hood under the radiators and blow the cooling air upwards through the radiator cores. They are numbered 1, and 2, with the No. 1 fan being closest to the cab. For fuel efficiency, each cooling fan is driven by a two-speed AC motor, which in turn is powered by the companion alternator. As the engine coolant temperature rises, the fans are energized in sequence as determined by the computer control system. The cooling fans are powered through contactors which are controlled by the EM2000 program. The system is designed to maintain engine cooling water temperature between 79º C to 85º C (175º F to 185º F). Refer to Section 4 “Cooling System” for more detailed information. ELECTRICAL EQUIPMENT 8-19

DYNAMIC BRAKE GRID BLOWER ASSEMBLY Each dynamic brake grid cooling blower assembly, consists of a 48 inch, 10 blade fan powered by a series wound direct current motor. During dynamic braking the locomotive traction motors operate as generators supplying AC generated power to the traction inverters. The inverters convert the AC power into DC power which is applied back to the DC link for each grid paths (2). A portion of the electrical current from the traction motors is shunted around one of the resistor grids and used to power the grid blower motor (36 HP). Air driven by the grid blower drives grid heat to atmosphere.

F23903

Figure 8-21 Dynamic Brake Grid Blower motor

TURBO LUBE PUMP MOTOR The turbo lube pump motor, is a 3/4 Hp ,1200 RPM, 64 - 74 VDC motor assembly, coupled directly to a lubricating oil pump and mounted on the engine crankcase on the left side of the locomotive. At engine start-up the pump provides lubrication for the turbocharger bearings and at shutdown the computer (EM2000) continues pump operation to carry away residual heat from the turbocharger bearings.

FUEL PUMP MOTOR The fuel pump motor, is a 3/4 Hp ,1200 RPM, 64 - 74 VDC motor assembly directly coupled to the fuel pump. The fuel pump motor assembly is mounted on the equipment rack. During engine operation the pump supplies fuel oil for combustion and injector cooling. A bypass valve at the primary fuel filter protects the motor against overloading due to filter plugging.

8-20


0

STARTING MOTORS AND SOLENOIDS The starting motor solenoids, mounted on the starting motor housings, Figure 822, contains concentrically wound coils PU (pickup) and HOLD. When energized, by the pick-up of STA contactor the low resistance PU coil drives the starter motor pinion into place (engaged with the engine ring gear). The starting contactor (ST) then shorts out the PU coil and the high resistance HOLD coil has sufficient energy to hold the pinion engaged. When the cranking signal is removed, the starting contactors drop out and the starting motors pinions disengage from the engine ring gear. The diesel engine is equipped with two 64VDC motors (connected in parallel) for cranking. Power circuits to the motors are interlocked so that the pinions of both starting motors must be engaged with the engine ring gear before cranking power can be applied.

F14024

Figure 8-22 Engine Starting Motor


CAB EQUIPMENT Most operating equipment is located on the engine control panel and the control consoles. The No. 1 control console is shown below. The No.1 control console (left side) faces forward. The No. 2 control console (right side) faces rearward. Most gauges, controls, indicator lights, and switches used by the locomotive operator during normal operation are located on both control consoles.

Figure 8-23 #1 Control Console CONTROL CONSOLES The majority of the locomotive operator control equipment is located on the following sections of the control consoles. Refer to Figure 8-23 and Figure 8-24 LEFT SIDE SWITCH PANEL CONTROL AND OPERATING SWITCH PANEL (#2 CONSOLE ONLY) CONSOLE DESKTOP FRONT INSTRUMENT PANEL 8-22


0

F41967

Figure 8-24 #2 Control Console

LEFT SIDE SWITCH PANEL A switch panel,Figure 8-25, is located at the left lower section of both operator’s control consoles and contains the following devices:

Figure 8-25 Left Side Switch Panel ELECTRICAL EQUIPMENT 8-23

GAUGE LIGHTS Switch Gauge lights will be ON when the toggle switch is UP.

CONSOLE LIGHTS DIMMER Rheostat This dimmer rheostat is used to control the intensity of the gauge lights and the illuminated switches on the console.

ATTENDANT CALL Switch The attendant call push-button is used to sound the alarm bell in all units coupled in consist.

CAB LIGHTS Switch This switch is provided for cab area lighting, Lights are on when the toggle switch is in the UP position.

FLASHER LIGHTS Switches Two toggle switches control the short and long hood flashers units.

CAB FAN Switch Fans, are self contained units mounted in the cab room to provide air circulation. Each Fan is provided with an ON/OFF control switch.

CONTROL & OPERATING SWITCH PANEL (#2 Control Console only)

F41970

Figure 8-26 #2 Control Console and Operating Switch Panel

8-24


0

ENGINE RUN Switch This slide-button switch must be ON to obtain throttle control of engine speed. If the engine run switch is in the OFF position, the engine will run at idle speed regardless of the throttle handle position (except in self load test).

GENERATOR FIELD Switch The generator field slide-button switch must be ON to enable traction motor excitation. If the switch is in the OFF position, the main generator is still excited but the motors will not develop power.

NOTE AC traction technology uses the main generator to power the DC link rather than the traction motors directly. This difference alters the operating definition of the generator field that we are normally accustom too

CONTROL AND FUEL PUMP Switch The control and fuel pump slide-button switch provides power to the low voltage control circuits. The switch must be ON to start the engine and operate the electric fuel pump.

NOTE Engine Run, Generator Field and the Control and Fuel Pump operating switches in the center of the panel must be set in the ON position when the unit leads in a consist, and set in the OFF position if the unit is trailing or dead in a consist. The switches snap into the ON position when moved upward.

DYN BRK CONT CB Circuit Breaker This circuit breaker protects against a faulty operating or test setup. The circuit breaker should be in the ON (up) position for normal operation. A tripped circuit breaker generally indicates that, during dynamic brake testing, more than one dynamic brake handle in a consist was out of OFF position.

MU ENG STOP (Multiple Unit Engine Stop) Push-Button Switch This push-button switch is used to stop all engines in a consist. It is a PUSH ONPUSH OFF switch mounted on the right side of the number 2 control console above the control and operating switch panel. Pressing the red STOP section will shut down all units in a consist, providing that they are in RUN with throttles in IDLE position. During normal operation, or to restart engines, depress the black or green section identified as RUN. Refer to the Engine Starting and Stopping Section for detailed operation.


CAUTION The locomotive controller on this locomotive model does NOT have a STOP position for the THROTTLE/DYNAMIC BRAKE handle and consequently no multiple unit (MU) engine stop function.

Figure 8-27 Consoles Desk Top Equipment DESK TOP EQUIPMENT LOCOMOTIVE CONTROLLER The locomotive controller, at the left side of the console top surface, Figure 828, has two operating handles which control three different functions. The handle to the left, called the DIRECTIONAL HANDLE or REVERSER, controls the direction in which the locomotive will move. The handle located on the right side, called the THROTTLE/DYNAMIC BRAKE, controls the throttle and dynamic brake responses.

DIRECTIONAL HANDLE The directional (reverser) handle, Figure 8-28, has three detent positions; NEUTRAL (centered), FORWARD, and REVERSE (backward).

8-26


0

CC36514

Figure 8-28 Directional (Reverser) Handle When the handle is moved forward toward the short hood end of the unit, circuits are set up for the locomotive to move in that direction. When the handle is moved backward toward the rear (long hood) end, the locomotive will move in that direction when power is applied. With the handle centered, mechanical interlocking prevents movement of the THROTTLE/ DYNAMIC BRAKE handle to a dynamic braking position, however, it can be moved to a throttle position. In such a case, power will not be applied to the traction motors. Note: Mechanical interlocking assures that the directional handle can be moved only when the THROTTLE/DYNAMIC BRAKE handle is in the IDLE position.

CONSISTS WITH DC UNITS Damage to traction motors in trailing DC units may occur if the directional handle is moved from forward to reverse or reverse to forward while the locomotive is in motion - the handle position should be changed only when the locomotive is completely stopped. The directional handle is centered and removed from the controller to lock the THROTTLE/DYNAMIC BRAKE handle in the IDLE position. Note: Directional handle must be removed when the locomotive is in trailing position.

THROTTLE/DYNAMIC BRAKE HANDLE The throttle/dynamic brake handle has two control areas or sectors labelled THROTTLE and DYNAMIC BRAKE divided by a gate. Refer to Figure 8-29. To move the handle from throttle to dynamic brake or from dynamic brake to throttle, the handle has to be passed through the gate, i.e., push handle to the right, then straight, then back to the left. An illuminated window to the right of the handle indicates the handle position.


CONSISTS WITH DC UNITS During transfer from power operation to dynamic braking, the handle must be held in IDLE for 10 seconds before moving it to the SET-UP position to eliminate the possibility of a sudden surge of braking effort with possible train slack run-in or DC traction motor flash-over.

Throttle Sector : The throttle sector has nine detent positions; IDLE, and 1 through 8 power positions. From the IDLE position, against the gate, the handle is pulled backward to increase engine speed and locomotive power.

Figure 8-29 Throttle/Dynamic Brake Handle NOTE Mechanical interlocking assures that the handle can be moved from throttle IDLE position to a position in the dynamic brake sector only when the directional handle is positioned for either FORWARD or REVERSE operation.

8-28


0

Dynamic Brake Sector: The dynamic brake sector has one detent position; SET-UP, and an operating range 1 through 8, through which the handle moves freely without “notching.” From the SET-UP position, against the gate, the handle is pushed forward to increase dynamic braking. MECHANICAL INTERLOCKS ON THE CONTROLLER :The handles on the

controller are interlocked so that: 1. With directional handle in NEUTRAL (centered) a. Throttle/Dynamic Brake handle can only be moved to a position in the throttle sector. b. Dynamic brake sector not accessible. c. Directional handle can be removed from controller if THROTTLE/DYNAMIC BRAKE handle is in IDLE position of the throttle sector. 2. With directional handle removed from controller a. Throttle/Dynamic Brake handle locked in IDLE position of the throttle sector. b. Dynamic brake sector not accessible. 3. With directional handle in FORWARD or REVERSE a. Throttle/Dynamic Brake handle can be moved to any position in the throttle or dynamic brake sectors. The design of the controller, however, is such that only one sector can be engaged at a time. b. Throttle/Dynamic Brake handle in dynamic brake sector, Directional handle is locked in either FORWARD or REVERSE. c. Throttle/Dynamic Brake handle in throttle sector, Directional handle is locked in either FORWARD or REVERSE. d. Throttle/Dynamic Brake handle in IDLE position of throttle sector, Directional handle can be moved to FORWARD or REVERSE position, or if centered in the NEUTRAL position, handle can be removed which will lock Throttle/Dynamic Brake handle in IDLE position.

HEADLIGHT SWITCHES In multiple unit consists the lead unit controls the headlights. Headlight control switches in trail units must be properly positioned. Two rotary switches provide independent control of the front and rear headlights HDLTS-Cab End and HDLTS L/H Ends. The switches have 4 positions: OFF, DIM, MED, and BRT positions.


ALERTER RESET PUSHBUTTON The locomotive control computer EM2000 provides the vigilance function. When locomotive brakes are released, the system requests an acknowledgment from the locomotive operator from time to time. The acknowledgment request consists of : 1) Alerter light (located to the right of the front instrument panel) flashing for 17 seconds. 2) Alerter alarm (located on the engine control panel) sounds for 17 seconds. (Lights still flashing). Pressing the alerter alarm reset button, resets the acknowledgment request timing cycle. If the alerter system request is not acknowledged during the alarm cycle, the alarm stops sounding and a penalty brake application occurs.

MANUAL SANDING SWITCHES Manual sand is cut out when the locomotive is operating in power mode at speeds above 19.4Km/h or when the unit is in wheel creep mode below the speed of 19.4 Km/h. If a wheel creep equipped locomotive is in a multiple unit consist with older units, pressing the manual sand switch will supply a trainlined signal to the older units and sand will be applied. Manual sanding is available in dynamic braking at all speeds. Activation of sand switches also reset the locomotive vigilance system The amber colored non-latching push-button switch on each of the control consoles provide a signal to the sanding input of the EM2000 control computer and causes the amber light to turn on. The computer determines which direction the locomotive is moving and directs the trainlined signal to the appropriate (forward or reverse) sanding magnet valves.

HORN PUSH-BUTTON SWITCHES There are two (2) non-latching blue colored push-button devices provided on each of the control consoles to activate the unit’s front or rear air horns. These horns are individually controlled by pressing the button of choice, causing the locomotive horn to sound and the blue light to turn on until the button is released.

8-30


0

CONSOLE FRONT INSTRUMENT PANEL The front instrument panel is located on the front “vertical” center section of the two lower control consoles. It includes two window wiper controls, five gauges, an alerter light and an indicator light panel.

f41969 f41968

Figure 8-30 Tractive Effort and Speed Meter TRACTIVE / BRAKING EFFORT METER On both consoles contain dual scaled analog meters that provide the tractive effort indications when in power mode and the braking effort in dynamic braking. The tractive effort can be read as the indicating needle moves from the center Zero (0) point towards the right of the gauges scale. Alternately when the locomotive is in dynamic braking the indicating needle will move to the left side of the scale from the common Zero (0) point of the gauge.

SPEED INDICATOR The analog speed indicator provides a true ground speed reference of the locomotive via the radar input.


AIR PRESSURE GAUGES To the left of the console two (2) dual indicating air brake gauges are provided on each console. One of the gauges provides “independent brake system” information for the locomotives main reservoir and the locomotives brake pressure. The other “automatic brake system” provides brake pipe pressure and equalizing pressure for the train consist.

Figure 8-31 Pressure Gauges

8-32


0

AIR FLOW GAUGE The air flow indicator provides the crew with air leak information in the train braking system

Figure 8-32 Indicating Lights Panel INDICATING LIGHTS PANEL This indicating light panel is mounted on the far right side of the instrument panel. It has lights that indicate operation of various locomotive systems

NOTE Each of the following indicator lights has the push -to-test feature, which allows testing the light circuit alone. This test determines if the light circuit is working properly. Pressing the lens cap applies supply voltage to the light circuit . After a one second delay the light should switch on, TE LIMIT Light - Indicates tractive effort limiting function has been activated from the EM2000 display on this locomotive or on another that is trainlined with this one. SAND Light - Indicates that a sanding request has been made to the locomotive computer by means of a SAND switch actuation on this locomotive or on any locomotive trainlined to this locomotive. Other sanding requests are made by the automatic sanding function (to help wheel creep or wheel slip control) and the emergency air brake applications. WHEEL SLIP Light- Four conditions cause the wheel slip light to switch ON. One of these, Locked Wheel, is dangerous, and requires immediate action by the crew. The others do not require immediate crew action. These four conditions are listed as following.


NOTE Wheel slip annunciation is trainlined. Anything that causes a wheel slip warning on any trainlined locomotive causes the WHEEL SLIP light to switch ON on this locomotive. 1. LOCKED WHEEL CONDITION

NOTE Refer to, and follow Indian State Railways regulations concerning Locked Wheel faults. Locomotive computer immediately lights WHEEL SLIP indicator and drops load when Siemens system detects locked wheel. After 10 second delay, (20 if air brakes are applied), locomotive computer sets fault, sounds alarm bell, continues WHEEL SLIP light, and displays following message: #nLOCKED WHEEL - STOP TRAIN AND THEN CHECK IF THE WHEELS TURN FREELY. Fault indications above continue until the driver uses locomotive computer display panel to reset fault .

WARNING Locked wheels on moving locomotives are very dangerous. If locked wheel is indicated, perform the following steps. a. Stop train and set throttle handle in IDLE. b. Find the locomotive with the Locked Wheel indications . c. Slowly roll the unit with indication past an observer watching for sliding wheels and listening for unusual noises from traction motors and gearcases. Are any wheels sliding and/or traction motors or gear cases making unusual noises? Yes - Go to step d No - Go to step e d. Take appropriate action specified by Indian State Railways rules and regulations concerning Locked Wheel.

WARNING Do not, under any circumstances tow a locomotive having sliding/locked wheels, or move such a locomotive in tandem..

8-34


0 e. Reset fault by pressing RESET key on locomotive computer display (Locked Wheel fault message screen). f. Has this fault occurred previously and no problem was found? Yes - Go to Step g. No - Go to Step h. g. On the locomotive computer display, disable Locked Wheel detection for the faulty axle(s). h. Continue monitoring for Locked Wheel fault reoccurrences. Report or shop locomotive at the next maintenance point for Locked Wheel system problem. (End of Locked Wheel Procedure) 2. WHEEL SLIP CONDITION - While starting a train when rail conditions are exceptionally poor, an occasional flash of the light indicates normal wheelslip control. Automatic sanding may also occur. Do not reduce throttle setting unless severe lurching threatens to break train.

NOTE: When rail conditions are poor and the locomotive is operating in power above 2.4Km/h (1.5MPH), occasional, irregular WHEEL SLIP light flashing may indicate a wheel creep system failure. Operation may continue, but report condition to authorized maintenance personnel. 3. WHEEL SLIP CONDITION ON OTHER LOCOMOTIVE - If another locomotive in tandem, connected by MU jumpers to this locomotive, detects any condition that causes it to light its WHEEL SLIP indicator, it energizes the trainline that lights the WHEEL SLIP indicator on this locomotive. 4. WHEEL OVERSPEED CONDITION - The indicator light flashes ON and OFF to indicate wheel (and traction motor) overspeed, which can be caused by excessive track speed or by simultaneous slipping of all locomotive wheels. In either case, the system automatically corrects by adjusting traction alternator output. FLSHR LAMP Light - flashes On/Off when either outside flasher lamp (at cab end or at long hood end) is flashing, provided that outside flasher lamp is not burned out and LIGHTS circuit breaker is closed. Flashes at the same rate as the outside flasher lamp PCS OPEN Light - The Knorr air brake system de-energizes locomotive control system pneumatic control relay PCR whenever it initiates a safety control or emergency air brake application. When PCR trips, it switches On the PCS OPEN light, and EM2000 turns off the excitation, interrupting locomotive power/dynamic brake operation.


To restore locomotive power after safety control or emergency brake conditions end, reset PCR: set throttle handle in IDLE, then set automatic brake handle in EM (Emergency) for 60 seconds, them move it to REL (Release). BRAKE WARN Light - The BRAKE WARN indicator lights turn on whenever this locomotive, or another locomotive in tandem (MU jumpers connected) is generating excessive dynamic braking current, regardless of tractive effort meter reading. If the light switches On, act to make sure that it does not remain On longer than a few seconds.

CAUTION Failure to reduce dynamic braking current when the BRAKE WARN indicator has been On for more than a few seconds can result in major equipment damage and electrical fires The locomotive computer recognizes whether this locomotive originated the BRAKE WARN indication, or whether it came from another trainlined locomotive. If the warning is coming from a trainlined locomotive, EM2000 displays a message stating that fact. If BRAKE WARN indications are repeated, determine which locomotive is at fault, and take it out of dynamic braking service by setting its DYN BRAKE switch (on engine control panel) in CUT OUT. That locomotive then can operate normally under power, but cannot produce dynamic braking. If the faulty dynamic brake system is not cut out, and excessive braking effort continues for an extended period, automatic dynamic brake lockout will occur.

ALERTER LIGHT EM2000 controls the alerter awareness lights and cab buzzer. There are two (2) lights, one on each of the control consoles. The lights turn “on” when EM2000 request an acknowledgment from the locomotive operator.

CONTROL CONSOLES INTERNAL EQUIPMENT RE DB41 thru 46 & RE DB51 THRU 56 These devices are dropping resistors used in conjunction with dynamic brake rheostats RH40 & RH50 to provide a progressively higher brake reference voltage as the dynamic brake handle is moved to a higher position.

RE CTLR41 & RE CTLR 51 These 1.5 K ohm dropping resistor are used for the controller lights for each of the respective consoles.

8-36


0

RH GA41 & RHGA51 These potentiometers provide dimmer control for the gauge light circuits for each of the respective consoles.

RE GA41-A1 thru GA41-B3 & RE GA51-A1 thru RE GA51-B3 These 275 ohm dropping resistor are used in the gauge light circuits.

TB50 51,52,53,54,55: Terminal Boards These terminal boards are used to connect the control console equipment to the locomotive electrical system

RHS - Reverser Handle Switches RHS-R (Reverse) and RHS-F (Forward) switches are mechanically activated by the locomotive operator when he moves the reverser handle. RHS-R switches contacts C-D of both consoles are connected to DIO-2 input channel 11 (RHSW R). RHS-F switches contacts C-D of both consoles are connected to DIO-2 input channel 10 (RHSW F). Contacts A-B of all four RHS switches (RHS-F#1, #2 and RHS-R #1, #2) are connected in parallel to DIO-1 input channel 18 (LD unit) so that EM2000 can recognize if the locomotive is in TRAIL or LEAD position

THS - Throttle Handle Switches The throttle handle switches 1 thru 8, idle, 5-6, 3 thru 8, 5 thru 8 and 2-4-6-8, are mechanically attached to the throttle handle. These switches are connected to the locomotive computer (EM2000) through the use of input channels to determine throttle handle position in power mode.

BKS - Braking Handle Switches The braking handle switches BKS-B and BKS-BG are mechanically activated by the throttle handle when it is placed in the braking section of the controller. BKS-B switch contacts C-D closes as soon as the throttle handle is put into the “SET-UP” position, 74VDC is applied to M.U. receptacles pin 17 and to the Dynamic Brake rheostat assembly. BKS-BG switch contacts A-B closes when the throttle handle is pushed out of the set up position to the Dynamic Braking section, the output of the rheostat (depending on the position) is applied to MU receptacles pin 24 and to the computer ASC (Analog Signal Conditioner) module. This signal represents the Dynamic Braking power level requested by the operator.


ELECTRICAL CONTROL (#1) CABINET EQUIPMENT WARNING High voltage and current are present within this cabinet. Do NOT open a cabinet door except to access the Circuit Breaker panels. Refer to SAFETY PRECAUTIONS FOR GT46MAC LOCOMOTIVES in Appendix C. The electrical control cabinet, Figure 8-34, houses some of the electrical and electronic equipment needed to power and control the locomotive. This equipment includes principally EXTERNAL •

The No. 1 Circuit Breaker Panel -

•

The Engine Control Panel

•

The No. 2 Circuit Breaker and Test Panel

•

The locomotive Computer Display

INTERNAL

8-38

•

Locomotive Control Computer (EM2000) Chassis

•

Computer Power Supply Chassis

•

Computer Panel Mounted Modules (ASC, FCF, FCD,TLF)

•

Digital Voltage Regulator Module (DVR)

•

4 Braking Contactors (B1, B2, B3, B4)

•

DC Link Transfer Switch (DCL 123, 456)

•

Silicon Controlled Rectifier (SCR) Assembly

•

Battery Charging Rectifier (BC) Assembly

•

GTO Power Supply (GTOPSI, GTOPS2)

•

Current and Voltage Transducers

•

Contactors and Relays


0

F43278

Figure 8-33 #1 Electrical Control Cabinet Equipment (Front View)


F43283

Figure 8-34 #1 Electrical Control Cabinet Equipment (Back view)

8-40


0

F42001

Figure 8-35 #1 Circuit Breaker Panel

NO. 1 CIRCUIT BREAKER PANEL The No. 1 circuit breaker panel, Figure 8-35, contains circuit breakers and switches used in the control and protection of diesel engine and electrical systems. The circuit breakers can be operated as switches but will trip open when an overload occurs. The following paragraphs describe the function of the equipment on this panel. The circuit breaker portion of the panel is divided into sections. Breakers in the shaded section must be ON (lever up) during locomotive operation. Breakers in the unshaded section are to be used as conditions require.

LIGHTS C.B. This double pole 30A circuit breaker provides power and protection to the locomotive +74 VDC switch controlled light circuits, including the maintenance, cab, hood, flashers, classification and gauge lights.

HDLTS (headlights) This 35A circuit breaker provides power and protection to the front and rear headlights circuits.


RADIO This 15A circuit breaker is installed, between the radio base and the locomotive battery, it protects the radio communication equipment

EVENT RECORDER This 3A circuit breaker provides power and protection to the event recorder circuit.

CAB FANS This 15A circuit breaker provides power and protection to the cab fan motors and control circuit.

AIR DRYER This 15A circuit breaker provides protection for the air dryer system.

A.C. CONTROL This double pole 15A circuit breaker protects the part of the ground relay system (GRT and T2) connected to the companion alternator output, as well as the AC input to FCF (Firing Control Feedback) module. EM2000 can monitor the status of the circuit breaker using the contact assembly of the A.C. control C.B. connected to DIO-2 input channel 1 (AC CNTL) of the computer multiplex circuit.

CONTROL This 40A circuit breaker sets up the fuel pump and control circuits used for engine starting. The control circuits are fed by battery power through the battery knife switch before an engine start. Once the engine is running, the auxiliary generator supplies power through this breaker to maintain operating control. A set of contacts belonging to the control circuit breaker is connected to DIO-1 input channel 5 (CNTL CB) of the computer multiplex circuit.

LOCAL CONTROL This 30A circuit breaker establishes “local” (not trainlined) control with power from the locomotive battery to operate heavy duty switchgear, magnet valves, contactors, governor solenoids, wheel flange lube system, and the DIO computer input/output modules. A set of contacts is part of this circuit breaker assembly. It is connected to DIO-2 input channel 18 (LC BAT) of the computer multiplex circuit.

DCL CONTROL This 3A circuit breaker protects the DC Link (DCL) transfer switch motor and control circuits. A safety guard is applied over this breaker to avoid inadvertent actuation.

8-42


0

FILTER BLOWER MOTOR This 30A circuit breaker protects the inertial filter blower motor circuit. The blower is used to evacuate dirt laden air from the central air compartment inertial filters. A set of contacts is part of this circuit breaker assembly. It is connected to DIO -1 input channel 3 (FLBWCB) of the computer multiplex circuit. If this breaker trips open or is inadvertently left in the OFF position, then a FILTER BLOWER MOTOR CB OPEN message will appear on the EM2000 display panel. NOTE: If the filter blower motor breaker is tripped open (OFF), operation may continue to the nearest maintenance point.

AC GTO #1 PWR SUPPLY This double pole 15A circuit breaker is installed between the 55VAC 3ø output of the auxiliary generator and the GTO power supply - PS GTO1 that provides the 24 VDC supply input for the #1 inverter (TCC1).

AC GTO #2 PWR SUPPLY This double pole 15A circuit breaker is installed between this 55VAC 3ø output of the auxiliary generator and the GTO power supply - PS GTO2 that provides the 24 VDC supply input for the #2 inverter (TCC2).

AUX. GEN. FLD This 10A circuit breaker protects the auxiliary generator field circuit and the digital voltage regulator module (DVR). A contact being part of the circuit breaker closes the circuit between the DC output of the auxiliary generator and the DVR module. A trip coil, also part of C.B. assembly may be energized by DVR if an overvoltage condition is detected. If the breaker is tripped, then auxiliary generator output to the low voltage (+74 VDC) system is eliminated. No auxiliary generator output causes the fuel pump to drop out - the diesel engine goes to idle and eventually shuts down. A FUEL PUMP NOT RUNNING: FORCED IDLE and a NO LOADING- NO CA6 OUTPUT message appears on the EM2000 display panel.

AUX. GEN. F.B. This 10A circuit breaker provides power and protection to the firing control driver (FCD) module.

FUEL PUMP This 30A circuit breaker protects the fuel pump motor circuit.


TCC1 COMP This 10A circuit breaker provides power (74VDC) and protection to the #1 truck traction control (TCC1) computer and associated circuits. This circuit breaker has a contact installed in series with DIO-2 input channel 4 (TC1 BKR) of the computer multiplex circuit. A safety guard is used over this breaker to avoid inadvertent actuations.

TCC2 COMP This 10 A circuit breaker provides power (74VDC) and protection to the #2 truck traction control (TCC2) computer and associated circuits. This circuit breaker has a contact installed in series with DIO-2 input channel 4 (TC2 BKR) of the computer multiplex circuit. A safety guard is used over this breaker to avoid inadvertent actuations.

TURBO This 30A circuit breaker provides power and protection to the turbo lube pump motor. It must be in ON position (lever up) before diesel engine start for prelube and after diesel engine shutdown (to remove residual heat from the turbo bearings). If the diesel engine is running and this circuit breaker is OFF (lever down), then a TURBO CIRCUIT BREAKER DOWN message will appear on the EM2000 display panel. A protection cover is used over this circuit breaker to avoid inadvertent actuation.

COMPUTER CONTROL This 15A circuit breaker provides breaker provides power and protection to MCB relay and to EM2000 Power Regulator PRG.

CAUTION Both the COMPUTER CONTROL and TURBO circuit breakers must remain ON (lever up) after engine shutdown. This allows continued operation of the turbo lube pump to cool down the turbocharger bearings. The battery knife switch can be open immediately after diesel engine shutdown .

TCC ELECT BLOWER MOTOR This 30A circuit breaker is used to protect the TCC electronics blower motor, located in the inertial filter compartment. This blower supplies cooling air to the electronics in both TCC #1 and #2 cabinets

MICRO AIR BRAKE This 15A breaker provides power from the locomotive battery to the Knorr Air Brake computer relay unit/voltage conditioning unit.

8-44


0

GROUND RELAY CUTOUT Switch This double pole toggle switch disconnects the ground protection relay GR from the locomotive high voltage electrical circuits for maintenance inspections or troubleshooting. When this double pole switch is open, one contact cuts out the ground relay and the other contact connected to DIO-1 input channel 2 GRNTCO turns off this input channel. EM2000 will not allow main generator excitation. This switch is normally locked in the closed (lever up) position by a pin which is safety wired to a switch guard bracket. In this position, the Ground Fault Protection System is armed.

ENGINE CONTROL PANEL Various switches and controls used in the operation of the locomotive are mounted on the engine control panel, Figure 8-36, A brief description of each device follows:

Figure 8-36 Engine control panel

ISOLATION Switch This rotary type switch can be used to isolate the locomotive from other units in consist and has two operating positions - RUN and START /STOP/ ISOLATE which are described as follows:


RUN Position This position puts the locomotive on line after an engine start - the unit will load and respond to throttle control in a normal manner.

START/STOP/ISOLATE Position The isolation switch must be in this position to start the diesel engine. The engine starting switch (FP/ES) is cut out unless the isolation switch is in START/STOP/ISOLATE. This position also isolates the locomotive, therefore, the unit will not develop power - the diesel engine runs at idle speed in all throttle positions. This position will also silence the alarm bell in a no power condition, but not for a hot engine alarm.

NO DBCO (Dynamic brake CUT-OUT switch) When this slide switch is moved to CUT-OUT or OFF position (down), the locomotive will not operate in dynamic brake. The locomotive will operate in power with normal air braking and no other units in consist are affected. The switch can be used to limit the number of units in a consist that operate with dynamic braking or to cut out a unit with defective dynamic brake system while allowing it to operate in motoring. This switch is normally safety wired in the CUT-IN or ON position to avoid inadvertent actuations

EXTERIOR LIGHTS Switch (Rear Platform & Fuel Station) This slide switch is used to provide ON/OFF control of the platform and fueling station lights at the left and right side fueling areas. With the slide-button in the ON (up) position, power is supplied to these lights, provided that the battery knife switch is closed and the LIGHTS breaker is in the ON (up) position.

MAINTENANCE (Engineroom) LIGHTS Switch This slide switch is used to provide ON/OFF control of the engineroom and inertial filter compartment maintenance lights. With the slide-button in the ON (up) position, power is supplied to these lights, provided that the battery knife switch is closed and the LIGHTS breaker is in the ON (up) position.

EFCO (Emergency Fuel Cutoff) / STOP Switch The diesel engine will stop whenever this engine stop push-button switch is pressed and held in for approximately one (1) second. It need not be held in until the engine stops: however, holding the button in for one (1) second ensures that the computer recognizes the switch actuation as a proper shut-down signal.

BATTERY CHARGING Ammeter The battery charging current ammeter indicates the status of charge on the batteries (either charging or discharging). The battery charging ammeter does not indicate the auxiliary generator output, or the engine cranking current during startup.

8-46


0

CLASS LIGHTS Switch This rotary switch has three (3) positions; LONG HOOD FORWARD, OFF, and CAB END FORWARD. The function of these positions are as follows: CAB END FORWARD Position •

Illuminates cab end classification lights

OFF Position •

Turns off classification lights

LONG HOOD FORWARD Position •

Illuminates long hood end classification lights

WARNING Locomotive operating personnel are not to access any devices within the high voltage areas of the Electrical Control Cabinet due to the presence of residual high voltage. Access within these areas of the cabinet is limited to maintenance personnel that are knowledgeable of the DCL discharge procedures. This restriction does not apply for access to electrical panels used in normal operation.


NO. 2 CIRCUIT BREAKER AND TEST PANEL

Figure 8-37 No.2 Circuit Breaker Compartment The No. 2 circuit breaker compartment, Figure 8-37, has provisions for circuit breakers as well as a test panel intended for use by maintenance personnel during maintenance and testing procedures. All three circuit breakers must be ON (lever up) during locomotive operation.

TEST PANEL This panel is used by maintenance personnel to measure main generator field voltage (DC), companion alternator voltage (Max 230VAC), load regulator voltage(DC) and battery voltage (DC).

GENERATOR FIELD CIRCUIT BREAKER The main generator receives excitation current from the companion alternator through silicon controlled rectifiers (SCR). This 90A circuit breaker protects the silicon controlled rectifiers, the main generator field and the associated circuitry. A current overload in the main generator field is normally detected by EM2000 circuit causing an EXCESSIVE GENERATOR FIELD CURRENT message to appear on EM2000 display screen. The message will disappear when field current drops to a safe level.

NOTE This breaker trips to the CENTER position. Wait for the generator field to cool before resetting the breaker. Reset by moving the breaker lever down to full OFF before raising it to ON.

8-48


0

TTC1 BLWR CIRCUIT BREAKER This triple pole circuit breaker is used to protect the Traction Control Converter (TCC) Cabinet #1 blower motor. The circuit breaker has a contact assembly connected to DIO 2 input channel 4 (TC1BKR) of the computer multiplex circuit.

TTC2 BLWR CIRCUIT BREAKER This triple pole 30A circuit breaker is used to protect the Traction Control Converter (TCC) Cabinet #2 blower motor. The circuit breaker has a contact assembly connected to DIO 2 input channel 4(TC2BKR) of the computer multiplex circuit.

MAIN CONTROL PANEL Many smaller electrical devices such as relays and resistors are mounted on the main control panel, Figure 8-38, which is located inside the Electrical Control Cabinet across the top back wall. These devices are listed, starting at the top right corner looking into the front (cab side) of the cabinet.


.

F43284

Figure 8-38 Top Half Of Main Control Panel RE HDLT DIM A & DIM B These 3.75 ohms dropping resistors are used to provide proper voltage for the headlights in the dim position.

RE HDLT CE A - CE B & RE HDLT HE A - HE B These 16 ohms dropping resistors are used to provide proper voltage for the headlights in bright position.

PD1, 2, 3, 4 - POWER DISTRIBUTION CONNECTORS Each of these three Power Distribution connectors provide 36 common connected sockets. They are used to distribute low voltage DC (74VDC Pos. and/or Neg.) from circuit breakers to the computer multiplex circuit and output channels. 8-50


0

CMU1, 2, 3 CONNECTORS - MULTIPLEX CIRCUITS These multiplex plugs and connectors are used in computer DIO module input channel multiplexing circuits. Each CMU connector has several groups of electrically commoned terminals with each group isolated from the others. Within a common group, one pin connects (through the mating CMU plug) to a DIO module input channel, and the others connect (through the same CMU plug) to the various circuits being monitored by that DIO input channel. Each CMU connector is assigned to a group of 4 multiplexed input channels.

DIP- DIODE INPUT PANELS 30, 31, 32 These Diode Input Panels are used to connect a single DIO output channel to as many as eight different DIO module inputs (including external devices being monitored) for multiplexing purposes. They consist in 24 sets of two diodes in series for each input line to prevent backfeeding electrical noise from one DIO input channel to another.

TB BAR This terminal board provides the interface between the barometer signal and the EM2000 locomotive computer by way of the Analog/Digital/Analog (ADA) module. The barometer is also provided +5 VDC input power through TB BAR from the Analog Signal Conditioner (ASC) module.

BAROMETER The barometer senses atmospheric pressure in the #1 electrical cabinet and provides an analog voltage signal representing absolute air pressure to the EM2000 locomotive computer through the ADA module. Maximum barometric air pressure output is approximately +5 VDC.

RE AG FIELD A-B These 5.7 ohms resistors are connected in series between input terminal F-J & LN of the DVR module and the field winding of the AC auxiliary generator. Its purpose is to limit current to DVR controls circuits and auxiliary generator field winding.

SPR1, SPR2 - SIEMENS PROTECTION RELAYS Each coil is connected into the Siemens computer starting circuit module. Under the right conditions, the starting circuit module completes the circuit to the coil, and allows the relay to pick up, thus providing power to the computer. This relay is used to temporarily disconnect the traction computers (Siemens) from the battery voltage during engine startup when the battery voltage drops.


MCB-EM2000 COMPUTER CONTROL RELAY This relay is controlled by the COMPUTER CONTROL circuit breaker. (The former name of the breaker was MODULE CONTROL, which is the basis for the MCB designation.) MCB picks up when the COMPUTER CONTROL breaker closes, provided that either the battery knife switch is closed or the turbo lube pump relay (TLPR) is picked up. MCB drops out if the COMPUTER CONTROL breaker opens. When MCB drops out, #1 contact closes to keep the fuel pump relay FPR energized (Bypass the FPRLY output channel), provided that all four following conditions are met: 1. 2. 3. 4.

Battery knife switch is closed. LOCAL CONTROL breaker is closed. No emergency fuel cutoff (EFCO) switch is operated. Shutdown relay SDR is not picked up.

#2 contact opens the circuit between DIO-2 output channel 6 (TEL LED) and the Tractive Effort Reduction LED(AMM TM 1 and 2). #3 contacts closes to discharge the PRG (Computer Power Regulator) capacitors.

TEL - TRACTIVE EFFORT LIMITING RELAY This relay is energized by EM2000 when the operator selects the traction effort limit function on the display screen (T.E. Limit can be reduced to 294Kn (66 140 Lbs). When this relay is energized, #1 contact closes the circuit to DIO-3 input channel 13 (TEL) this is the TEL relay status feedback to EM2000. The #2 contact closes to feed M.U. receptacles pin#14. (all EM2000 controlled units in the consist will also reduce their tractive effort), the traction effort limit indicator lights on each of the control consoles and the DIO-3 input channel 19 (TE TEL).

BWR - BRAKE WARNING RELAY This relay is picked up when the computer senses a grid overcurrent condition. When BWR picks up, dynamic braking operation cuts out, and the BRAKE WARN indication appears on the consoles. The coil of BWR is energized by the EM2000 computer through DIO-1 output CH4 (BWR). BWR #1 contact provides a BWR pickup input signal (DIO-2 input, CH2) to EM2000 and BWR #2 contact energizes the 20T trainline and turns on the DIO-2 input channel 22 (BW 20T) and the brake warning indicator lights on the control consoles. EM2000 displays a brake warning indication.

8-52


0

EFCO - EMERGENCY FUEL CUTOFF AND ENGINE STOP RELAY The EFCO relay is held picked up in normal operation - the EFCO is energized when emergency fuel cutoff is not requested. Momentary pressure on EFCO/STOP, EFCO2, or EFCO3 turns off the EFCO relay coil and disables the DIO-2 (IN)(CH18) NOEFCO signal to the computer. Dropout of the EFCO relay energizes the D valve in the Woodward governor causing the fuel injectors to go to the no fuel position and the engine to shut down from lack of fuel. EFCO/STOP switch is located on the engine control panel of the electrical cabinet. EFCO2 and EFCO3 switches, are located at the locomotive underframe near each fuel filling stations.

PCR - PNEUMATIC CONTROL RELAY The red PCS OPEN indicator light on the control console comes on to indicate a safety control or emergency air brake application. In normal operation, PCR is picked up. The +74 VDC is supplied on 13T through PCR #3 (NO) contacts to power throttle handle switches and turn on DIO-2 input channel 9 (PCS). PCR #1 (NO) contacts #1 provide 13T voltage, through Knorr CRU (Computer Relay Unit) K5 relay contacts, to hold PCR picked up when the throttle is moved out of idle position. PCR #2 (NC) contacts turns on the PCS OPEN light when PCR is not energized. When a safety control or penalty brake application occurs, the Knorr air brake system CRU (Computer Relay Unit) opens the feed to PCR. PCR contacts #2 close to turn on the PCS OPEN indicator lights. PCR #3 contacts open to turn off the PCS input (CH9) signal to the EM2000 computer and de-energize the throttle handle switches as well as the trainlined throttle signals. The computer then acts to cut off main generator/traction motor power, reduce engine speed to TH1, and display a NO LOAD-PCS OPEN message on the EM2000 screen display. To restore locomotive power (to re-energize PCR) set the throttle handle in IDLE, then set automatic brake handle in EMERGENCY for 60 seconds. Then move it to RELEASE.

TLPR - TURBOCHARGER LUBE PUMP RELAY TLPR energizes the turbocharger auxiliary lube oil pump at engine start and shutdown, and prevents engine start until TLPR is picked up. TLPR is picked up by EM2000 computer through DIO-2 (OUT)(CH23). Contacts energize the turbocharger auxiliary lube oil pump at engine start, and shutdown. Refer to Section 3 “Lubricating Oil System” for detailed operation.

WL - WHEEL SLIP LIGHT RELAY This relay is energized when the computer senses a wheel slip, wheel overspeed, ELECTRICAL EQUIPMENT 8-53

or locked powered wheel condition. Pickup of the WL relay turns on the WHEEL SLIP light on the control consoles . The WL relay is picked up by the EM2000 computer through DIO-1 (OUT) (CH3). WL relay N.O. contact #1 is connected to DIO-2 input channel 2 (WH SLP) of the multiplexing circuit (Relay Status Feedback). The N.O. contact #2 is used to feed M.U. receptacles pin 10T, the wheel slip lights on the control consoles and turn “on” DIO-2 input channel 21 (WL 10T)

VPC - VOLTAGE PROTECTION CONTACTOR The power supply starting circuits for the Siemens inverter computers and the voltage protection contactor (VPC) protects computers against overvoltage conditions and does not allow the TCC computers to start up unless all modules are in place. The contacts #1 and #2 of the Voltage Protection Contactor (VPC) are open during (and for a short period after) engine starting in order to allow the DVR to gain proper control of the Aux. Gen. output. Immediately following engine starting, the output of the DVR module can momentarily overshoot its controlling voltage of 74 volts to a point that can cause damage to the GTO circuitry. VPC contact #3 is connected to DIO#1 input channel 2 (VPC) of the multiplexing circuit (contactor status feedback).

SDR - SHUT DOWN RELAY Pressing the MU Engine Stop Switch on the #2 control console picks up SDR. SDR pick-up results in an immediate engine shutdown of all locomotive coupled in the consist. Refer to Section Engine Starting and Stopping for detailed operation.

AR - ALARM RELAY The alarm circuit alerts the operator of abnormal conditions or protective device activity. The relay (AR) is de-energized and the alarm bell rings whenever the attendant call push-button is pressed, or through software - whenever the computer senses various operating conditions. The AR coil is connected to DIO-1 module output CH1 (NO AR) of the EM2000 computer. When the computer de-energizes AR relay, the contact #2 closes to connect 74 VDC control voltage to: Trainline 2T, the alarm bell and the DIO #1 input channel 9 (ALARM).

FPR - FUEL PUMP RELAY The fuel pump circuit provides the locomotive operator with the means of shutting off the fuel pump from a switch on the Left Side CB/Switch Panel on the lower control console #2.

FPR relay is normally energized by EM2000 through DIO-2 output channel 11 (FPRLY). If the computer control circuit breaker is opened while the engine is running, the MCB interlock will prevent the engine shut down by keeping FPR 8-54


0 energized. An emergency fuel cut-off request or MU (Multiple Unit) shut down request de-energizes the FPR. Contacts #1 and #2 are in series between the fuel pump circuit breaker and the fuel pump motor. Refer to section “Fuel System” for more detailed operation.

CAUTION The control and fuel pump switch must always remain in the ON position while the engine is running. If an engine shuts down from lack of fuel, damage to the engine fuel injectors is possible.

CMPSYN - COMPRESSOR SYNCHRONIZATION RELAY CMPSYN relay is picked up by DIO-3 output CH14, based on the EM2000 compressor loading software routine. An air compressor load request signal is sent to trainline 25T, when CMPSYN is picked up

DBGR - DYNAMIC BRAKING GROUND RELAY This relay is used to connect the dynamic brake grid to the locomotive ground detection system. During normal operation, (both TCC’s are cut-in), DBGR coil is not energized and its contacts connects grid path #2 to the ground relay system. Remember that in dynamic braking, when both trucks are CUT-IN, the two grid paths are connected in parallel so that the ground relay (GR) will pick up if there is a high voltage ground on either grid path. In the case where a TCC (TCC1 or TCC2 ) need to be cut out, EM2000 disconnects grid path #2 and uses grid path #1 to connect the remaining TCC during dynamic braking opeation. When this event occurs, DBGR coil is energized through B2 and B4 contactors interlocks and DBGR contacts move to connect grid path #1 only to the ground relay circuit.

CAUTION In the event of a grid path#1 failure such as open/shorted grid, open/seized Blower Motor, EM2000 will switch automatically to grid path#2 when only one TCC is cut in.

RE PRG- RESISTOR, POWER REGULATOR MODULE (EM2000) This resistor is used to discharge the PRG capacitors when the computer control circuit breaker is turned off.

DCR - DRYER CONTROL RELAY The DCR relay controls the electronic timer “memory” of the air filter/ dryer, which permits the unit to regenerate only when the locomotive is in motoring or dynamic braking, or when an air compressor on any locomotive in a multiple unit consist is loading (pumping), in order to conserve additional air. The DCR relay is controlled by EM2000 through DIO 3 output channel 5 (DCR). Refer to Section 6 Compressed Air system for more detailed information.

DRC - DIODE RECTIFIER CAPACITOR ASSEMBLY This is a Diode Rectifier Capacitor Suppression device used to protect relay pickup coils such as GFD from transients when contacts paralleling DRC are ELECTRICAL EQUIPMENT 8-55

opened.

CR ST Prevents backfeed from batteries through starting circuit string and battery positive string when battery knife switch is open and TLPR relay is picked up.

CR BRK 1, 2, 3, 4 These rectifiers prevents backfeed between the B1, B2, B3, B4, through the negative feeds to the IS switch.

CR PCS Prevents backfeed of PCR reset control circuit into EM2000 locomotive input/output computer circuits.

CR TC1 - CR TC2 Smooth voltage spikes caused by dropout of SPR relay(s)

Z1 - ZENER DIODE This zener diode is used to ensure that the auxiliary generator output voltage regulated by DVR is above a certain limit before the computer DIO 2 input channel 23 (AGENON) turns “on”.

8-56


0 .

F43285

Figure 8-39 Top Left Half Of Main Control Panel RE GR1 & RE GR2 RE GR1 and RE GR2 are each dual resistors used in the ground relay (GR) circuit. Four 10 ohms resistors - RE GR1A, RE GR1B, RE GR2A, and REGR2B are wired in series to form one leg of a bridge circuit for the ground relay circuit which is tied between the two series connected main generator halves.

RE GR 3 & RE GR4 RE GR3 and RE GR4 are each dual resistors used in the ground relay (GR) circuit. Four 10 ohms resistors - RE GR3A, RE GR3B, RE GR4A, and RE GR4B are wired in series and connected to the dynamic brake grids and to one leg of the bridge circuit for the ground relay circuit.


RE VDCL This 200 k ohms resistor is used to limit current going through the DC link voltage transducer VDCL. The resistor tolerance value is from 198 KΩ to 202 KΩ

RE GNR A, B, C This resistor assembly (RE GNR-A, GNR-B, GNR-C) consist in three 100 ohms resistors connected between the 3 phase output of the main generator right stator half and GRT (ground relay transductor). These are current limiting resistors for the main generator phase imbalance detection circuit.

RE GNL A, B, C This resistor assembly (RE GNL-A, GNL-B, GNL-C) consist in three 100 ohms resistors connected between the 3 phases output of the main generator left stator half and GRT (ground relay transductor). These are current limiting resistors for the main generator phase imbalance detection circuit.

VDCL: DC LINK VOLTAGE SENSOR This hall effect voltage transducer measure the DC link voltage (main generator output). PDP2 (Power Distribution Panel) supply the ±15 VDC required for the transducer operation and provides the connections between VDCL and ADA (Analog to Digital to Analog) module. VDCL is connected in series with a current limiting resistor directly across the main generator. The output signal from VDCL is from the “M” fast on connection point and is in milli amps. The input voltage vs output current ratio is 40.3 VDC/M.A.

GR: GROUND RELAY The ground relay is part of the circuit that shuts down the main generator if any of the following faults occur:

1. A failed group of rectifying diodes - This results in loss of an output phase and potential generator damage. 2. Development of a positive or negative high voltage path to ground - This is a potential fire hazard. GR is normally de-energized - it is picked up when GR pick-up coil current exceeds 750-875 milliampere. The ground relay is held in its tripped position by a mechanical latch in the relay and is reset by the EM2000 computer. The EM2000 provides a reset lockout function that prevents further resetting after a specific number of resets within a given time period. A ground relay lockout can be reset through EM2000 display. Eliminate the cause of the ground relay fault, to prevent a repeat ground relay lockout condition.

GRT: GROUND RELAY TRANSDUCTOR This transductor contains several control windings which act on a single output winding. The control windings are connected in circuits which sense faults that are potentially dangerous to the main generator.

8-58


0

CR GNL 1, 2, 3 Used in the ground relay transductor (GRT) circuit to prevent AC voltage from the main generator from being applied to the negative DC generator bus output.

CR GNR 1, 2, 3 Used in the ground relay transductor (GRT) circuit to prevent AC voltage from the main generator from being applied to the positive DC generator bus output.

RE GRT This 190 ohms resistor is connected in parallel with the primary winding of transformer T2, and in series with the primary winding of Ground Relay Transductor GRT. It is used to shunt voltage spikes that occur across T2.

T2: GROUND RELAY TRANSFORMER Provides supply voltage to ground relay GR pickup coil circuit.

CR GR1 THRU 8 These rectifiers make up the ground relay (GR) bridge circuit and protect the ground relay coil circuit from voltage spikes.

CA GR1 THRU 6 These capacitors are used to filter out the high frequency “noise” coming to GR as induced by the “capacitor” formed by the AC motor frame and stator windings (approx. 40 NF) at high speed (high frequency).


MODULE COMPARTMENT The module compartment houses several replaceable modular devices used for various locomotive system requirements. A brief description of each module is provided here with a more detailed explanation provided in Section 9.

F43286

Figure 8-40 Module Compartment (front view)

8-60


0

PANEL MOUNTED MODULES

F43287

Figure 8-41 Arrangement/ Location of Panel Mounted Modules, Power Chassis and Diagnostic Panel

DVR300 : DIGITAL VOLTAGE REGULATOR The DVR module regulates auxiliary generator output by controlling auxiliary generator field current. The auxiliary generator ouput voltage can vary from 72.5V to 77.5 V depending on battery box ambient temperature. Refer to Section 9 for more detailed information.

FCD300: FIRING CONTROL DRIVER The FCD module amplifies the SCR’s gate signals from the EM2000 CPU. The Green LED on the module faceplate must be “ON” during normal operation. Refer to Section 9B for more detailed information.

FCF300: FIRING CONTROL FEEDBACK MODULE The FCF module provides feedback from the CA6A companion alternator to the EM2000 CPU. This module contains the zero cross detection circuit which tells the CPU when each of the companion alternators phase crosses from the negative half cycle to the positive half cycle. Refer to Section 9B for more detailed information.

ASC300: ANALOG SIGNAL CONDITIONER MODULE The ASC module converts and conditions analog feedback signals into DC voltage signals that are suitable for the Analog to Digital to Analog module ADA. Refer to Section 9B for more detailed information.


TLF301: TRAINLINE FILTER MODULE The TLF module converts the +74 VDC trainline signals from older model locomotives into a form that can be processed by the EM2000. Refer to Section 9B for more detailed information.

COMPUTER CHASSIS (Refer to Section 9B for Detailed Information) The EM2000 computer chassis is equipped with the following modules:

F43288

Figure 8-42 Arrangement /Location of EM2000 Computer Chassis

DIO300: DIGITAL INPUT/OUTPUT MODULE The digital inputs and outputs to and from EM2000 are handled by the 3 DIO modules. Each DIO module has 24 input channels and 26 output channels. The DIO modules act as an interface between the locomotives 74VDC systems and the computer 5 VDC system.

ADA305: ANALOG TO DIGITAL TO ANALOG The ADA module converts analog input signals (Pressure-Temperature-VoltageCurrent-Speed) into digital signals for the computer and converts digital computer output signals into analog signals. (Speed indicators, tractive effort meter)

8-62


0

CPU302: CENTRAL PROCESSING UNIT The CPU module contains the central processing unit which performs the actual computing operation.

MEM300: MEMORY The MEM module is the archive memory that remembers the dynamic locomotive parameters and archive fault and operational data that is required when all power has been removed from the EM2000 system.

COM301: COMMUNICATIONS The COM module provides an interface for communication between the EM2000 locomotive computer, the SIBAS traction inverter computers and the Knorr air brake system computer.

POWER CHASSIS

F43289

Figure 8-43 PRG 300

The EM2000 control system requires DC power supplies of various ranges. Specifically, the chassis uses +5VDC, +12 VDC & -12 VDC. Many feedback devices called Hall Effect Transducer Devices as well as the RADAR Transceiver and magnetic speed pick-ups require + 15 VDC and - 15 VDC.


PRG 300 POWER REGULATOR The PRG 300 is the power conditioner for the PSM modules. It received its input from the Aux. Gen./Battery circuitry and will function properly when the input voltage is between 20 and 95 VDC. When the input is between 25-63 VDC , the PRG boosts the output voltage to 64-73 VDC. This boosting operation can continue for a limited time before thermal overload occurs. Boost time depends on the amount of boost required. With an input above 63 VDC, the PRG active boost circuitry turns off, and the PRG acts as a low pass filter with the output just lower than the input by approximately 1 VDC. The PRG also acts as a power dissipating resistor when input is too high. The resistive circuitry activates at approximately 80 VDC. 1. The green LED on the faceplate indicates operation of boost mode. This is not a fault condition an is no cause for concern considering the modules. It is, however, a warning that battery voltage is too low for continuous computer operation without output from Aux. Gen. The boost mode will work for about 20-30 minutes. 2. The red LED for input fault will illuminate when the input voltage rises above 93 VDC or falls below 22 VDC. When this LED is on, the PRG300 is disabled. To reset, the breaker must be cycled and remain in the off position for at least 20 seconds as noted on the faceplate. 3. The red LED for output fault will turn on if greater than 7 A of output current is detected. The module interprets this as a short circuit and shuts down boost operation lighting the output fault LED. The LED goes off when the overcurrent condition is removed. Four test points on the module allow for the measurement of + & -74 VDC input as well as output. Notice that the 74 VDC negatives are not common

8-64


0

PSM 300 POWER SUPPLY MODULE The PSM 300 steps down the 74 VDC input from the PRG 300 to +5 VDC and distributes the power to the computer chassis. Notice that this system does not use a negative 5 VDC supply. The PSM 300 must receive an input between 55 and 90 Volts from the PRG 300 in order to function properly.

F43290

Figure 8-44 PSM 300 PSM 310 POWER SUPPLY MODULE The PSM 310 steps down the 74 VDC input from the PRG 300 to +/- 12 VDC and distributes the power to the computer chassis. The PSM 310 must receive an input between 55 and 90 Volts from the PRG 300 in order to function properly.

F43291

Figure 8-45 PSM 310


PSM 320 POWER SUPPLY MODULE The PSM 320 steps down the 74 VDC input from the PRG 300 to +/- 15 VDC and distributes the power to the PDPs (Power distribution panels) and the computer display screen. The PSM must receive an input between 55 and 90 volts from the PRG 300 in order to function properly.

F43292

Figure 8-46 PSM 320 PSM Module Test Points and LEDs Each of the PSM modules has 4 LEDS (3 on PSM 300) on the faceplate. 1. The green LEDs (only one on the PSM 300) indicate operation within the specified 2.5% of the supply’s rated output voltage. 2. The red input LED indicates a transient in the input line exceeding the input range of 55-90 VDC. This is not necessarily a fault. 3. The red fault LED indicates that the output current from the module is out of the specified range. All three modules have +&- 74 VDC input test points. Test points to measure the module output voltages are also provided. The PSM300 has +5 VDC and a common; the PSM 310 has + & - 12 VDC and a common; and the PSM 320 has + & - 15 VDC and a common.

DIAGNOSTIC PANEL The diagnostic panel consist in 4 communication ports that give access to the TCC1 and 2 computers, the air brake computer and the event recorder (when applied). These communication ports allow maintenance people to download information (fault events, operational data) and perform certain tests.

8-66


0

F43293

Figure 8-47 Module Compartment Rear View. PDP1-2 - POWER DISTRIBUTION PANEL These panels are used to distribute the ± 15 VDC needed to power the current and voltage hall effect transducers and the radar transceiver. Most of the signals coming in or going out of ADA (Analog to Digital Analog) module goes through the Power Distribution Panels. ELECTRICAL EQUIPMENT 8-67

FC DIS BOX - FIRING CIRCUIT DISTRIBUTION BOX This distribution box is used to connect the computer to the Panel Mounted Modules FCF (Firing Control Feedback) and FCD (Firing Control Driver).

SIG DIS BOX - SIGNALS DISTRIBUTION BOX This distribution box connects the COM301 (Communication) module to the traction control computers (TCCs) and to the air brake system computer (Knorr).

RDRTST - RADAR TEST RELAY This relay is picked up by EM2000 when performing the radar self test. RDRTST contacts provide +15 VDC to the radar transceiver.

8-68


0

ELECTRICAL CABINET - LOWER PORTION GFC: GENERATOR FIELD CONTACTOR

F43294

Figure 8-48 Electrical Cabinet Bottom Section - Front View The normally-open main contacts of this device are located in the AC supply from the companion alternator to the main generator excitation rectifier, SCR. The contactor picks up when circuits are complete for power operation, dynamic braking, or load testing. The GFC contactor is controlled by the EM2000 and picks up when circuits are complete for power operation, dynamic brake, or load testing. Moving the throttle handle into a power position, with other circuit logic conditions satisfied, provides a generator field pick up signal DIO-1 input channel 15 (GF REQ) to the EM2000. With the Isolation Switch in RUN, GFD picked up and no engine shutdown request, EM2000 turns on DIO-1 output channel 2 (GFC) to pick up GFC. ELECTRICAL EQUIPMENT 8-69

GFD: MAIN GENERATOR FIELD DECAY CONTACTOR If a ground fault causes the ground relay GR to pick up the normally closed GR contact, J-K opens to de-energize GFD coil which contact 2B opens to dropout GFC (Generator Field Contactor). GFD main contacts open to insert resistor RE2 in series with the generator field discharge circuit, thereby increasing the field decay rate by limiting circulating current.

IMGF: GENERATOR FIELD CURRENT TRANSDUCER This hall effect current transducer is in the Main Generator Field circuit between the SCR (Silicon controlled Rectifier) assembly and the slip rings. IMGF provides EM2000 with an accurate field current measurement . The PDP 2 (Power Distribution Panel) supplies the ±15 VDC required for the transducer operation and provides also the connections between IMGF and ADA (Analog to Digital to Analog) module.

B1, B2, B3, B4: DYNAMIC BRAKE CONTACTORS In dynamic brake operation the DC link energy from the traction motors is applied to the grids, through the braking contactors, and dissipated as heat. Brake contactors B1 and B2 connect grids 1,2,3, and 4 (RE GRID 1,2,3,4) to the DC link with B1 at the positive side of the link. Brake contactors B3 and B4 connect grids 5,6,7, and 8 (RE GRID 5,6,7,8 ) to the DC link with B3 at the positive side of the link. Two contactors operate together to connect three 1.251 ohm and one .687 / .626 ohm taped blower grid resistance to the DC link circuit. The grids are connected in series arrangement that increases the overall resistance when two brake contactors are closed. This brake grid resistance allows current flow at high level as locomotive speed decreases.The DC Grid blower fan speed will be directly proportional to the grid current. The pickup of contactors B1 and B3 coils is controlled by the EM2000 computer and contactors B2 and B4 are picked up by B1 and B3 relay logic. Refer to Section 9 for more detailed information. Each contactor is rated to carry 1200 amperes continuously and is equipped with arc chutes that contain, expand, and extinguish arcs by action of an intermittent duty blowout coil structure.

DCL123/R1, DCL456/L1: DC LINK SWITCHGEAR The inverters are connected to the power circuit by a new set of switchgear called DCL switchgear. The motor used to drive the switchgear is driven directly from the EM2000. The normal position of the switchgear is closed which connects the inverters to the power circuit. A few conditions will cause the switchgear to open:

8-70

•

Inverter cutout is requested.

•

As required by DCL shorting Self Test.

•

Load test is requested.

•

Excitation self test is requested.


0 •

The engine is not running (based on CA frequency).

•

Various inverter and RS-485 serial link faults.

•

Battery knife switch is opened.

•

Unit is placed in isolate for more than 20 seconds.

When the transfer switches do change state, they actually motor over to a “shorted position”. Rather than leave the switch fingers in the centered position, they make contact with the “front” tips on the switch module, which are connected to a shorting bar. This bar will short all capacitors in the inverter to prevent accidental/incidental charging of the capacitors during normal maintenance routines. A ground wire runs from the shorting bar to the ground relay cutout switch to allow for meggering of the inverter or motors while TCC capacitors remain shorted. The shorting bars can be seen in Figure 8-18 as it is mounted on the front side of the switchgear. The switchgear is located in the center portion of the High Voltage Cabinet just above floor level. Like all other types of switchgear, the DCL transfer switches are not designed to break a load. Doing this will certainly cause arcing and destruction of the contact tips since cycling through a complete transfer can take anywhere from 3 to 7 seconds. For this reason, several conditions must be met before the switches can change state, among them, DC Link voltage and current must be below 50 volts and 50 amps respectively. Operation of the DCL switchgear requires that the DCL Control circuit breaker be closed. In order to insure that the DCL transfer switches make it to their shorted position in the event that someone were to isolate the unit, shut down engine, and pull the knife switch in rapid succession, the breaker has been wired ahead of the battery knife switch on the “hot” side.

F43277

Figure 8-49 DCL Switchgear


SCR: SILICON CONTROLLED RECTIFIER AC power from the companion alternator is rectified and applied to the main generator in controlled amounts by this rectifier assembly. The locomotive control computer (EM2000) determines how much power the SCR conducts to the generator field. Refer to Section 9 -Electrical Control for detailed information

PS GTO1-2 A set of wires run from the Aux Gen. 3 phase AC output to the GTO Power Supply boxes. These devices receive 3 phase AC power from the Aux. Gen. and produce a 24 VDC output to be used by the Gate Units in each TCC. The transforming devices are located in the lower portion of the #1 High Voltage Cabinet below the cab floor on the engineer’s side. Should the DC output voltage stray from the specified input range, the entire locomotive will drop load momentarily, operation of the inverter affected may cease if the proper 24 VDC supply cannot be provided consistently. The faceplate of each device has four LEDs.

F43295

Figure 8-50 GTO Power Supply Devices. The green +24 V LED (top) indicates that the power supply is producing output within its specified tolerance. The red OVERVOLTAGE and OVERLOAD LEDs (second & third from top respectively) indicates those fault conditions. The green INHIBIT LED (lower most) indicates that EM2000 has requested that the supply momentarily stop producing output. Whenever the supplies are receiving 55 VAC input, they ought to be producing output unless the EM2000 sends the inhibit signal. Each faceplate has also five test points. Three of the test points are black and provide a place to measure the 55 VAC input coming from the Aux. Gen . The other two points (red and blue) provide a place to measure the 24 VDC output from the device.

8-72


0

F43296

Figure 8-51 Electrical Cabinet Bottom Section Rear View


TCC 1 SS-TCC 2 SS - TRACTION CONVERTER CABINETS BLOWER SLOW SPEED CONTACTORS These contactors are controlled by EM2000 through DIO-2 output channel 7 (TCC1SC) and DIO-2 output channel 8 (TCC2SC). The main contacts of these contactors connects three phase AC from the companion alternator to the TCC’s blower motors. Each contactor has an auxiliary contact connected to EM2000 multiplexing circuit to provide contactor status feedback.EM2000 controls the contactors based on the traction control computer request.

IBKBL1-2 - GRID BLOWER MOTOR CURRENT TRANSDUCER These hall effect current transducers measure grids blower motor current. The PDP2(Power Distribution Panel) supplies the ±15 VDC required for the transducers operation and provides the connections between 1BKBL1-2 and ADA (Analog to Digital to Analog) module. This information is used by EM2000 to detect open/shorted motor condition and seized bearings. The 1BKBL1-2 output signal is in volts DC, the input current vs output voltage ratio is 25A/VDC.

1TCC 1 AND 2 - DC LINK CURRENT TRANSDUCERS These hall effect current transducers measure the DC Link current to each inverter. PDP1 (Power Distribution Panel) for the 1TCC 1 and PDP2 for TCC2 supplies the ±15 VDC required for the transducers operation and the connections between the 1TCCs and ADA (Analog to Digital to Analog) module.

CAUTION During replacement of a Hall Effect Current Transducer, care must be taken about current flow direction. An arrow on the device housing indicates current flow direction. Always refer to the proper schematic during repairs or replacement activities. TMA - TRACTION MOTOR AIR TEMPERATURE SENSOR This thermistor (Resistor which resistance value changes with temperature) is connected to the computer ADA module through PDP2 (Power Distribution Panel). EM2000 uses that information to determine Traction Motor overheating conditions.

1B1-2 - GRID PATH #1 AND #2 CURRENT TRANSDUCERS These hall effect transducers measure current in both grid paths. PDP2 supplies the ±15 VDC required for the transducers operation and provides the connections between the grid current transducers and ADA (Analog to Digital to Analog) module. EM2000 uses that information to control dynamic braking effort and current. The 1B1-2 output signal is in volts DC, the input vs output voltage ration is 200A/VDC.

8-74


0

EFS: ENGINE FILTER SWITCH EFS senses the pressure drop across the inertial plus the engine air filters. When the pressure drop across the combined filters reaches 24 inches of water, the switch will trip closed. EFS closing provides a signal to the computer which results in reduced engine speed and load. The display message will read EFS: PLUGGED ENGINE FILTERS: TH6 LIMIT. Speed and loading will be reduced to TH6 limit.

FVS: FILTER VACUUM SWITCH This switch senses the pressure drop across the inertial plus the engine air filters. When the pressure drop across the combined filters reaches 14 inches of water, the switch will trip closed. FVS closing feeds a signal to the computer. The display message will read ENGINE AIR FILTER DIRTY after the FVS has been active for some time, indicating excessive restriction of air to the engine.

RE MG1: GENERATOR FIELD DECAY RESISTOR This 4.8 ohm resistance is inserted in series with the main generator field to increase the rate of field decay when power is removed from the field.

RE MG2: SUPPRESSION RESISTOR With CA MG this 35 ohms resistor act to suppress voltage spikes at the SCR assembly.

CA MG: CAPACITOR When controlled rectifier SCR is turned on, this 5 MFD capacitor, in conjunction with RE MG2, suppresses the voltage spike that occurs when the “free-wheeling” diode around the generator field is turned off.

OTHER DEVICES IN THE ELECTRICAL CABINET HOSE STEMS FOR MANOMETER CONNECTION Three hose stems are provided at the front of the electrical cabinet.

AIR FILTERS - ENGINE PLUS INERTIAL This opening is piped to the outlet side of the engine air filter. It is used to measure the pressure drop across the carbody mounted inertial filters plus the engine air filter.

ELECTRICAL CABINET This hose stem opens directly to the inside of the electrical cabinet. It is used to measure the pressure drop across the electrical cabinet filters.


INERTIAL FILTERS This opening is piped to the central air compartment. It is used to measure the pressure drop across the carbody inertial filters.

TB31V-A, B, C, D, E, F, G, H, I, J, K, L, M: TERMINAL BOARDS These computer cable terminal boards connect the control computer to the traction inverter cabinets.

TB30-A, B, C, D, E, F, G, H, J, K, L: TERMINAL BOARDS These terminal boards are used to connect the #1 electrical cabinet with the other locomotive systems.

8-76


0

FUSE AND SWITCH COMPARTMENT The fuse and switch compartment, Figure 8-52 is located on the L.H. side of the locomotive above the battery box. It contains the following components:

Figure 8-52 Fuse And Switch Compartment STARTING FUSE The 800 Amp starting fuse is in service only when starting the diesel engine. Battery current is applied through the fuse, to the starting motors. In this way, the starting fuse protects the motors from a current overload. Although this fuse should be in good condition and always left in place, it has no effect on locomotive operation other than for engine starting. A defective fuse will be detected by the computer when attempting to start the engine. The DIO-1 input channel 20 (ST fuse) is turned off when the starting fuse is open. In that event, the computer will display the following crew message: “NO STARTSTART FUSE IS OPEN OR MISSING.”

BATT SW (Battery Knife Switch) This switch is used to connect the batteries to the locomotive low voltage (64/74 VDC) electrical system. This switch should be kept closed at all times during locomotive operation.


F43297

Figure 8-53 #2 Electrical Cabinet

The #2 Electrical Cabinet is located on the right side of the locomotive, under the locomotive underframe, between the No. 1 Bogie and the fuel tank. It contains the following components.

RE ST1, RE ST2: These 0.16 ohm resistors are connected across starting solenoids SM1 and SM2 to increase current through the starting motors during engagement. This increase in current is sufficient for positive engagement of pinion gear with ring gear.

STA - AUXILIARY STARTING CONTACTOR When the FUEL PRIME/ENGINE START switch is placed in the engine start position and DIO 1 output channel 18 is turned “ON” by EM2000 (if software conditions are fulfilled) STA main contact closes to apply battery power to the “pick up” solenoids that are part of the starting motors assembly. The solenoids drive the cranking motor pinions in, to mesh with the engine ring gear. Refer to section Locomotive Starting and Stopping for detailed operation.

ST - STARTING CONTACTOR The cranking motor assemblies are equipped with heavy duty contact tips. These tips make contact when the starting solenoid has operated to engage the cranking motor pinion with the starting gear. Such contacts are normally used to carry current to the cranking motors. However, to ensure reliability of the cranking devices, the locomotive uses the solenoid operated contacts to pilot a still heavier duty Starting Contactor, ST. The use of this Starting Contactor also ensures the engagement of each of the paired cranking motor pinions, before power is applied to the cranking motors.

8-78


0

BC ASM: BATTERY CHARGE ASSEMBLY Battery charge assembly BC ASM is made up of battery charge current limiting resistor RE-BC, battery charge rectifier CR-BC, and auxiliary generator rectifier assembly CR-AG. CR-BC consists of a pair of heat sink mounted silicon diodes in parallel with a selenium suppression rectifier that protects the silicon diodes from high voltage spikes. This rectifier prevents battery current from flowing through the field windings of the CA6B companion alternator when the diesel engine is stopped. RE BC protects the auxiliary generator and battery charging circuit against high currents if the battery has a very low charge. CR-AG is the auxiliary generator rectifier section. It consists in two matched sets of silicon diodes (three per set) mounted on heat sinks.

CB AUX GEN - AUXILIARY GENERATOR CIRCUIT BREAKER This 250A double pole circuit breaker is installed between the 55 VAC output of the auxiliary generator and the auxiliary generator rectifier CR-AG. It must be “ON” for normal operation.

TB 61A-62A - TERMINAL BOARDS These terminal boards connects the electrical cabinet #2 components to external components/systems.


AC (#3) CABINET The AC cabinet is located on the right side of the locomotive near the equipment rack. It contains equipment described as follows:

F43298

Figure 8-54 AC Cabinet RADIATOR FAN MOTOR FUSES These 300 ampere bolted lug-type fuses protect against the following: 1. Locked motor rotor due to bearing seizure or jammed fan blades. 2. Single phased motor windings. 3. Faulty fan contactors. 4. Faulty electrical plugs or cables. A small indicating fuse is affixed to the main body of each fuse, and is connected in parallel with the main fuse element. When the main element opens, the indicator link also burns open, and a spring loaded indicator pin protrudes. If an inspection reveals a single blown fuse, remove and discard both fuses used to protect the motor. This should be done because the second fuse, while not blown, will in all probability be degraded and will blow at the next fan start attempt.

8-80


0

CAUTION When working on a fan motor circuit always remove BOTH fuses to isolate the motor.

FCF1A, FCF2A,, FCF1B, FCF2B, FCF1A, FCF2A, FCF1B, and FCF2B are the fast speed cooling fan contactors for fans 1, and 2. These contacts configure the connections of the AC cooling fans motors to the companion alternator 230 VAC, 3-phase output to operate the cooling fan motors at the fast speed. Refer to section Cooling System for detailed information.

FCS1, FCS2 FCS1, FCS2 are the slow speed fan contactors for cooling fans 1 and 2. These contactors configure the connections of the AC cooling fans motors to the companion alternator output to operate the cooling fan motors at the slow speed. Refer to section Cooling System for detailed information.

TB80, 83A, 83B, 83C: TERMINAL BOARDS These terminal boards are used to connect the locomotive electrical system to the electrical devices in the AC cabinet.

MRPT - MAIN RESERVOIR PRESSURE TRANSDUCER This capacitive type pressure transducer monitors Main Reservoir pressure. PDP2 (Power Distribution Panel) supplies the ±15 VDC required to the transducer operation and provides the connection between MRPT and the EM2000 ADA (Analog to Digital to Analog) module. EM2000 uses that information to control the compressor unloader valves through MVCC. (Magnet Valve Compressor Control). Refer to section Compressed Air System for detailed operation.

DIP 80 - DIODE INPUT PANEL This diode input panel is used to connect single output channels to as many as 8 input channels for multiplexing purposes. This panel consists in 24 sets of two diodes in series for each input line to prevent backfeeding electrical noise from one DIO input channel to another.

CMU4 - CONNECTOR, MULTIPLEX CIRCUIT This connector is used in the computer multiplexing circuit. Each CMU connector has several groups of electrically commoned terminals with each group isolated from the others. Within a common group, one pin connects (through the mating CMU plug) to a DIO module input channel, and the others connect (through the same CMU plug) to the various circuits being monitored by that DIO input channel. Each CMU connector is assigned to a group of 4 multiplexed input channels.


MISCELLANEOUS LOCOMOTIVE EQUIPMENT CABLE CONNECTIONS BETWEEN COMPUTER CHASSIS The cables between computer chassis must be connected for correct operation of the computer. Each cable has a specific unique jumper arrangement inside its plug. All cables are identified and computer plugs are keyed to prevent wrong connections.

ETP1, ETP2: ENGINE TEMPERATURE SENSING PROBES These two electronic temperature sensing probes (ETP1, ETP2) supply temperature data to the computer. They consist in a thermistor device which resistance value changes with the temperature. The probes are connected to ADA module, where their feedback is converted to a digital signal for the computer. EM2000 uses the highest temperature feedback signal to control all cooling functions. In the event of one probe malfunction, the second probe provides backup data.

Temperature vs. Resistance Table F° C° OHMS -58 -50 803.1 -40 -40 842.7 -22 -30 882.8 -4 -20 921.6 14 -10 960.9 32 0 1000.0 50 10 1039.0 68 20 1077.9 86 30 1116.7 104 40 1155.4 122 50 1194.0 140 60 1232.4 158 70 1270.7 176 80 1308.9 194 90 1347.0 212 100 1385.0 230 110 1422.9 246 120 1460.6 266 130 1498.2 284 140 1535.8 302 150 1573.1 * Interpolate for intermediate values

8-82


0

MV-H - MAGNET VALVES, HORN The horn Magnet Valves are picked up by the operator horn push-button switches on each Console. The magnet valve for the cab end horn is located in the short hood, zone 10. The magnet valve to the hood end is located in the long hood, zone 20.

MV-CC - MAGNET VALVE, COMPRESSOR CONTROL When the compressor control magnet valve is de-energized, the air compressor unloader valve opens and the compressor begins to pump. The magnet valve is controlled by EM2000 through DIO1 ouput channel 14 (MVCC). EM2000 controls this magnet valve based on information from MRPT (Main Reservoir Pressure Transducer) and trainlined units requests. A manual means in also provided to keep the air compressor unloaded. MV-CC can be held open by moving the manual override T handle into the locking position.

MV1 SF, MV1 SR, MV2 SF, MV2 SR - MAGNET VALVES, SANDING The computer controls the sanding magnet valves. Refer to section 6 - Compressed Air System for operation and Section 9J -Adhesion for sanding control.

TPU - TURBO MAGNETIC PICK UP The ADA module receives a square wave feedback signal from a magnetic pickup mounted in the right hand side of the turbocharger impeller housing (left hand side of the locomotive). This signal is used by the computer to protect against turbocharger overspeed. The magnetic pickup counts the number of impeller blades, and if the feedback frequency exceeds the limits established in software, the computer reduces main generator excitation. This in turn reduces exhaust gas temperature to slow down the turbocharger.

MV-RB - MAGNET VALVE RADAR BLOW OFF This magnet valve is used to blow air on the faceplate of the radar transceiver every 23 seconds. EM2000 controls this magnet valve using DIO-1 output channel 18 (RADBLW).

MV-TS - MAGNET VALVE TRACTION MOTOR BLOWER INLET SHUTTER This magnet valve is used to control the shutters on the air inlet of the traction motor blower. When the magnet valve MVTS is de-energized, the shutters are fully open, when energized shutters are partially closed thus restricting cooling air to the Traction Motors and reducing also the load on the diesel engine (fuel saving) when not needed. EM2000 controls this magnet valve using DIO-3 output channel 6 (TMSHTR). Refer to Section 5 -Central Air System for detailed operation.


MV-EBT - MAGNETIC VALVE ELECTRONIC BLOWDOWN TIMER This magnet valve is used to blow off the moisture/water trapped into the compressed air system centrifugal filter assembly. The computer controls this magnet valve using DIO-3 output channel 3 (EBT). Refer to Section 6 Compressed Air System for detailed operation.

RE-GRID - DYNAMIC BRAKING RESISTANCE GRIDS (GRID1 - 4, GRID 5- 8) These grids absorb power generated by the traction motors in dynamic braking or by the main generator is self-load test. Each set of grids consist in 3 resistor grids of 1, 251 ohms in series with a 0.687/0.626 ohms tapped grid on which a blower motor is connected. The blower dissipates the heat from the resistor grids.

EPU The engine speed pickup feeds back into the ADA as a 5VDC square wave signal. There are no test points to qualify. The unit does not require engine speed pickup to run, as the computer senses that the engine is running by looking at Companion Alternator output. For a proper feedback from the probe, it must be mounted correctly. Set the mounting gap as shown in Figure 8-55. The tolerance is .025" +/- .005". Be sure the spacing over the top of the ring gear teeth is properly set. If a .030" feeler gauge is not available, use a credit card or a 6 inch steel pocket ruler. They are both about .030" thick.

F43299

Figure 8-55 Engine Speed Probe

8-84


0

MRPT - MAIN RESERVOIR PRESSURE TRANSDUCER. The compressor control system uses MRPT to monitor main reservoir pressure. However, this pressure transducer does not control directly the operation of the unloader Magnet Valve.(MV-CC), but acts as an input to the control computer (through ADA module). Operation of MV-CC is controlled by EM2000 DIO-1 ouput channel 14 (MV-CC) based on feedback from MRPT and trainlined units requests. Refer to Section 6 Compressed Air System for detailed operation.


SERVICE DATA PARTS

Part No.

TA17-CA6 B RECTIFIER BANK DIODESRectifier Bank: Diode (Positive) White . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40029132 Diode (Negative) Pink. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40029131 Fuses & Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8407729 TA17 Brush . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40034666 CA6B (Grade AY). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8413190

Main Generator Brushes Min Length . . . . . . . . . . . . . . . . . . . . . 19mm (3/4 “) CAG Brushes Min. Length

8-86


0

SECTION 9A. ELECTRICAL CONTROL SYSTEM This section describes in general terms the electrical control equipment used on GT46MAC locomotives.

OVERVIEW The GT46MAC locomotive was designed and constructed to provide specific traction and braking characteristics required by the railroads. The primary control system device is the EM2000 locomotive control computer (LCC). Locomotive operating controls provide inputs to the control computer which then directs electrical power equipment and the diesel engine to operate within the constraints of the power and brake requirements. This section provides information about individual electrical and electronic control systems that make up the overall locomotive control system. The GT46MAC locomotive has a 16 cylinder diesel engine that produces a nominal 4000CV (3939HP). This mechanical power is converted to electrical AC power by the TA17-CA6B main generator, converted to DC by two internal rectifier banks, and applied to the DC link. The DC link couples the major components of the GT46MAC locomotive power system together. Refer to Figure 9A-1 below. These main components are: • • • •

MAIN GENERATOR - TA17-CA6B TWO TRACTION INVERTERS - TCC1,TCC2 SIX TRACTION MOTORS - TM1,TM2,TM3,TM4,TM5,TM6 DYNAMIC BRAKE GRIDS - RE GRID 1, 2, 3, 4, 5, 6, 7 & 8

ELECTRICAL CONTROL SYSTEM 9A-1

Figure 9A-1 Power Distribution Diagram

MAIN GENERATOR The TA17-CA6B main generator produces output power based on its excitation current and the speed that the diesel engine drives it. section on page 3 correlates throttle position to diesel engine speed, approximate main generator excitation current, and output power. The DC power output of the main generator is applied to the DC link circuit.

9A-2

GT46MAC Locomotive Servive Manual

0 .

Diesel Engine/Generator Power Data Throttle Position

Engine Speed (RPM)

Maximum Voltage Limit

Excitation Current Limit (A)

Power Limit (KW)

IDLE - GFC↓

200

0

0

0

IDLE - GFC↑

269

620

79

-

TH1

269

620

79

133

TH2

343

880

79

294

TH3

490

1295

95

665

TH4

568

1540

99

945

TH5

651

1760

102

1253

TH6

729

2130

105

1820

TH7

820

2430

107

2400

TH8

904

2600

109

2757

NOTE The TA17-CA6B main generator has two sets of stator windings externally connected in series to provide a higher output voltage.

DC LINK EQUIPMENT The DC Link is a common bus or interface between devices that generate DC power and devices that consume DC power - it "links" these devices together. The output of the main generator is supplied to the DC link transfer switch DCL. DCL is an 8 pole motor driven transfer switch that is used to apply DC power produced by the main generator to the inverters. The DC link voltage provided by the main generator is a result of diesel engine speed and excitation current from the companion alternator. The Table on page 3 shows DC link voltage as a function of throttle position.


NOTE Main generator output voltage is always the DC link voltage except in dynamic brake where the traction motors could generate an increased voltage

DC Link Voltage Throttle Position

DC Link Voltage

Throttle Position

DC Link Voltage

1

600

5

1600 - 1700

2

850

6

1600 - 1900

3

1200 - 1250

7

1800 - 2250

4

1400 - 1500

8

1800 - 2600

DC link voltage is applied to the traction inverters in power, or back through the traction inverters to the braking grids in dynamic brake. DC LINK VOLTAGE RANGE DC link voltage varies between 0 to 2700 VDC within these operating mode limits: TRACTION POWER -

minimum = 600 VDC maximum = 2600 VDC

DYNAMIC BRAKE -

minimum = 600 VDC maximum = *2700 VDC

* In dynamic brake main generator voltage is controlled to a maximum

of 600 VDC by the EM2000 computer. Because the traction motors are being used as generators the actual DC link voltage could be as high as 2700 VDC.

INVERTERS - IN GENERAL NOTE Although these terms are used synonymously, the term converter is for a device that can change either AC to DC or DC to DC. The term inverter is used to describe a device that changes a DC voltage into an AC voltage. There are two main types of DC Link/Inverter configurations:

1. Constant current DC Link with Current Source Inverters (CSI). CSI inverters are characterized by a series connected inductor. 2. Constant voltage DC Link with Voltage Source Inverters (VSI). VSI inverters are characterized by a parallel connected capacitor.

9A-4


0

GT46MAC INVERTERS The GT46MAC locomotive uses two voltage source inverters - one for each of the two traction inverters: TCC1 and TCC2. Voltage source inverters require a constant voltage supply on the DC link. These inverters control the output voltage and frequency to the AC traction motors by means of pulse-width modulation. The appeal of this system has increased with the development of solid state GTO (Gate Turn-Off) devices and microprocessor technology. NOTE The traction inverters TCC1 and TCC2 function as inverters (DC to AC) in power and as converters (AC to DC) in dynamic brake. In other words, the traction motors function as induction motors in propulsion and induction generators in dynamic brake. There is a capacitor filter across the input of each of the two inverters to smooth the output voltage from the main generator and for energy storage use in dynamic brake. Each filter is made up of 8 large capacitors mounted in each of the Traction Control Cabinets (TCC).

NOTE On type 2 inverters that will be applied to the locomotives assembled in India the 8 DC Link capacitors are being replaced by a single capacitor which carries the capacitance valve of the type 1 inverter 8 DC link capacitors. Each traction inverter inverts the DC link voltage into a variable-voltage, variable-frequency AC voltage which is applied to a parallel set of three traction motors. An increase in DC link voltage causes an increase in inverter input voltage which should cause an increase in power to the traction motors if the control computer is asking for it with the throttle setting.

AC MOTORS - IN GENERAL An AC motor running with no load has no induced voltage or current in the rotor the rotor is turning at the same speed as the magnetic field in the stator windings caused by the applied AC voltage. Applying a load causes the rotor to slow down. Slowing down the rotor causes the rotor RPM to fall below the rotating speed of the stator magnetic field. This difference in rotating speed is called SLIP. This slip between the rotating stator magnetic field and the rotor causes more flux lines to be cut thereby inducing a voltage in the rotor circuit. This induced voltage causes a current to flow in the rotor windings that counteracts the current induced in the rotor by the load trying to slow down the rotor. Load current opposes the induced rotor current. The rotor creates torque in trying to make the rotor current equal to the opposing load current thus attaining a new synchronous speed. When the motor RPM reaches the speed and torque necessary to support the load, then induced voltage in the rotor drops back to zero.


CONTROL COMPUTERS GT46MAC locomotives are equipped with four interrelated computers to provide electronic control of the various functions involved in locomotive operation. Refer to Figure 9A-1. These individual computers are:

•

The locomotive control computer, designated EM2000, controls traction power, monitors main generator feedback, limits main generator excitation levels, and control diesel engine support systems.

•

The Knorr CCB computer controls the air brake system based on control inputs from the electrical brake valve and feedback from the active brake elements.

•

The two Siemens SIBAS 16 monitors feedback signals and protective functions for each Traction Control Converter (TCC1, TCC2). Each SIBAS 16 uses an Intel 8086 microprocessor with an Ultra-Violet Erasable/Programmable Read Only Memory (UVEPROM).

use EC38020 (see corrections)

Figure 9A-1 EM2000 Interaction

EM2000 LOCOMOTIVE COMPUTER The EM2000 locomotive computer controls:

9A-6

• •

Generation of traction and brake reference signals Display/Diagnostic System (computer display)

•

Locomotive Cooling System - cooling fans, radiator shutters

•

Diesel Engine - governor speed settings, turbo. lube pump, fuel pump

•

Engine Starting Circuit

•

Dynamic Brake System -braking contactors/braking effort

•

Excitation - monitors companion alternator (CA6B) output and controls main generator excitation

•

Vigilance and wheel flange lubrication systems


0

INPUT/OUTPUT DEVICES The term input/output devices applies to input and output signals to the computer (input) or from the computer (output) to other equipment. An input/output device is necessary to change the signal level from one system to another for example; from the +74 VDC locomotive system (relays, switches, etc.) to the +5 VDC computer system or from the computer +5 VDC system to the +74 VDC locomotive system. This locomotive model is equipped with combination input/output modules designated as DIO(Digital Input/Output Modules), used for both inputs and outputs. For example: DIO2 is an input/output module that provides output signals from the EM2000 to pick up cooling fan contactors and input signals to the EM2000 when these contactors have picked up.


use EC41588 w/ corrections

Figure 9A-2 EM2000 Block Diagram.

9A-8


0

SUMMARY The EM2000 exerts overall control over the individual systems computers that make up the total locomotive. The other three computers are in some way dependent or subservient to the EM2000. EM2000/SIBAS - The EM2000 manages the GT46MAC traction system through an RS-485 serial link to the traction control converters (TCCs). EM2000/CCB - The Knorr CCB system air test set up and self test is initialized through the EM2000 computer display screen.


Figure 9A-3 SIBAS Computer Module Block Diagram 9A-10


0

TRACTION CONTROL CONVERTER COMPUTERS -SIBAS TCC1,TCC2 Each TCC computer is basically the same device - a SIBAS 16 that is modified for different applications on this locomotive. The SIBAS 16 is a 16 bit computer based on an INTEL 8086 microprocessor running at 5.6 Mhz. These two computers are dedicated to the two traction inverters; one controls the #1 inverter (TCC1) and the other one controls the #2 inverter (TCC2). The EM2000 locomotive computer controls the main locomotive functions based on inputs from the two traction computers. Refer to the Figure 9-5 on the previous page for a SIBAS block diagram.

PULSE WIDTH MODULATION Pulse width modulation (PWM) is used to control the output waveform from the traction inverters to the traction motors by varying the frequency and amplitude of the inverter output voltage. The traction motors require an increase in frequency to increase the speed of the traction motor and a proportional increase in voltage to maintain motor torque. Pulse width modulation is accomplished with a network of electronic switches (GTOs) that are controlled by the inverter computer to vary inverter output voltage and frequency. Refer to Pulse Width Modulation later in this section.

GATE TURN-OFF THYRISTORS Gate turn-off thyristors (GTOs) are solid state switches that allow the inverter output waveform to be closely controlled. Previous thyristor and SCR design allowed the gate signal to be turned ON with a gate but the device could not be turned OFF with the device. One way to turn off the device is to remove the supply voltage which would of course de-energize the circuit. A GTO has a gate that can turn it ON and OFF. The development of high power turn-off semiconductor devices permit pulse width modulation to control both the amplitude and frequency of the traction inverter output voltage thereby making AC motor control a reality for locomotive drive systems.

LOCOMOTIVE LOAD CONTROL SYSTEM A simplified diagram of the locomotive load control system is shown in Figure 9A-4.


F43300

Figure 9A-4 Locomotive Load Control System 9A-12


0

POWER SYSTEM VARIABLES Figure 9A-5 below illustrates the range of system variables that can be encountered during normal operation of the locomotive power system. NOTE The presence of any system variable assumes that the circuit is connected at that point - contactors, switches, relays, etc. are closed.

use F3301

Figure 9A-5 Operating Parameters


9A-14


0

SECTION 9B. EM2000 LOCOMOTIVE COMPUTER INTRODUCTION This section covers the GT46MAC locomotive computer system and the computer modules. NOTES 1. The phrase “locomotive control computer” is often abbreviated “locomotive computer” or “computer” in this manual. 2. In the text of this manual, many words, phrases, and abbreviations appear in a special typeface - “MG V” for example. Such expressions usually are taken from the computer display or from locomotive electrical schematics. For definitions of the schematic expressions, see the “Electrical Reference Designator Definitions” list in the General Locomotive Information section at the front of this manual. Certain other all-caps expressions are taken directly from device nameplates.

HANDLING ELECTRONIC EQUIPMENT - GENERAL WARNING Electrostatic discharge often damages electronic components and assemblies. Prevent electrostatic discharge around electronic equipment by adhering to the instructions that follow. Electronic components and assemblies that are sensitive to electrostatic discharge damage should display a warning label to alert personnel that special handling is required. Figure 9B-1 illustrates some common electrostatic discharge warning labels.

ELECTRONIC DEVICE

CAUTION!

CAUTION OBSERVE PRECAUTIONS FOR HANDLING

ELECTROSTATIC SENSITIVE DEVICES

SUBJECT TO DAMAGE BY STATIC ELECTRICITY HANDLING PRECAUTIONS REQUIRED ELECTRO-MOTIVE DIVISION GENERAL MOTORS CORPORATION LA GRANGE, ILLINOIS USA PLACE REMOVED DEVICE IN THIS BAG AND BOX TO RETURN TO EMD. USE LABLE INSIDE BAG TO RESEAL BAG.

THIS DEVICE IS ELECTROSTATIC DISCHARGE SENSITIVE!

F33637

Figure 9B-1 Electrostatic Discharge Warning Labels, Typical To help prevent electrostatic discharge damage, Electro-Motive ships new and Utex electronic equipment (including computer modules) in electrostatic discharge-protected bags and cushioned cartons, as shown in Figure 9B-2. Electronic equipment should remain in electrostatic discharge-protected bags until installed. Before electronic equipment is returned for repair, it must be placed in the bags, and the bags must be correctly re-closed (see next paragraph).

EM2000 LOCOMOTIVE COMPUTER 9B-1

Bag material is dark-colored, but transparent: serial numbers are legible through the bag. A disposable grounding wrist strap is included with each Electro-Motive electrostatic discharge-protected electronics package. Printed instructions for use appear on the grounding wrist strap envelope. To prevent trapping moisture within an electrostatic-protected bag, fold over the bag at the opening, and apply an adhesive-backed “Caution” label to secure the folded-over flap. Do NOT close the bag by means of heat sealing. An additional Caution label is included within each bag, for re-closure.

29629

Figure 9B-2 Properly Bagged Module in Cushioned Box, Box and bag are electrostatic-discharge protected.

9B-2


0

HANDLING PRECAUTIONS - SPECIFIC WARNING Grounding cords and wrist straps do not protect users against electric shock. When using disposable wrist straps or grounding cords and wrist straps, follow normal precautions against electric shock:

- If the equipment being handled has a grounding-type plug, make sure equipment is actually grounded. - Do not touch or contact grounded objects other than equipment connected to wrist strap. •

Appropriate grounding procedures prevent electrostatic charge buildup. When working on computer equipment, ground yourself by means of a disposable grounding wrist strap, or by means of a grounding cord and wrist strap. Wear the wrist strap and connect it to the “3042” grounding terminals in the No. 1 electrical control cabinet computer compartment, or to other convenient chassis ground points, such as computer chassis or chassis holddown hardware.

•

Electrostatic discharge-protected bags should be available at all test, storage, and shipping facilities.

•

Bring enough electrostatic discharge-protected bags to locomotive to protect all modules that will be removed during troubleshooting.

•

Bagged modules must be stored or shipped with electrostatic dischargeprotected cushioning. Do not use expanded polystyrene contoured packing or “popcorn.” Where possible, retain fiberboard cartons for storage and shipment.

The following list provides EMD part numbers for various electrostatic discharge protection items. Item

EMD Part No.

7" x 11" Electrostatic Discharge-Protected Bag

40000012


9575502


9575501

Caution Label

9576500


HOW TO USE ELECTROSTATIC DISCHARGE PROTECTION ITEMS When working at or near the No. 1 electrical cabinet computer compartment, use a disposable grounding wrist strap or a grounding cord and wrist strap until all work is completed, as directed below. CAUTION Wrist straps and grounding cords may loose conductivity through use. Make sure the ones you are using have been checked out recently. 1. Set all switches and circuit breakers to electrically isolate all circuitry in computer compartment.

2. Open computer compartment door, then follow either A or B, below. A. Use disposable wrist strap, if available. When new or replacement equipment is involved, a disposable wrist strap is supplied in equipment box. Proceed as follows: 1) 2) 3) 4) 5)

Unroll two folds of the strap. Wrap length of strap around your wrist, adhesive side to skin. Unroll the remainder of the strap. Peel off the protective liner from copper foil at strap free end. Press adhesive side of copper foil onto bare metal surface in computer compartment, such as side of computer chassis.

3. If disposable wrist strap is not available, use standard (non-disposable) wrist strap with grounding cord and alligator clip. 4. If wrist strap, grounding cord, and alligator clip are not already assembled, snap them together. 5. Slip wrist strap on. Strap (band) should fit snugly to ensure good electrical contact to skin. 6. Attach alligator clip at other end of grounding cord to convenient bare metal protuberance or edge in computer compartment. You can clip cord to any computer chassis mounting bolt, or to any of three brass air fittings on front of cabinet just above computer compartment, or to either “3042” grounding terminal in computer compartment. 7. Open computer chassis for access and remove module and/or component. 8. Take “new” (or Utex) module/component out of box and electrostatic discharge-protection bag, and install it. 9. Put module/component removed from chassis into electrostatic dischargeprotected bag, fold over end of bag, and apply Caution label to hold bag closed. 10. Put bagged module/component into electrostatic discharge-protected box. 11. Disconnect grounding cord or disposable wrist strap from grounding point. 12. Close chassis and compartment door.

9B-4


0

EM2000 LOCOMOTIVE CONTROL COMPUTER This section describes how the main computer on the GT46MAC works. We now need to see how the EM2000 accomplishes its task, and find out what each module in the system is used for. Figure 9B-3 shows a block diagram of the EM2000 control. As stated before, the modules are housed in two separate areas depending on their function or type of signals processed. All communication with the EM2000 is through the keypad on the display panel mounted on the high voltage cabinet.

COMPUTER FUNCTIONS On the EM2000, there is only one computer system controlled by one CPU module. The functions that the computer is responsible for are as follows: 1. Excitation - Controls Main Generator output in motoring and dynamic brake by varying the timing of the gating pulses to the SCR assembly. These pulses control the strength of the main generator field. EM2000 provides also the torque reference to the inverters. 2. Logic - Monitors the position of control devices in the cab (throttle position and switch position), and monitor and control on/off devices on the locomotive (e.g.. governor speed solenoids, contactors, relays, and magnet valves). It controls also the vigilance system and the wheel flange lubrication system. 3. Display - accepts inputs from the display panel, record data in archive memory, display information on the display screen and initiate diagnostic information on the display screen and initiate diagnostic functions through the display panel.


F43302

Figure 9B-3 EM2000 Block Diagram with AC Traction 9B-6


0

Grounding Receptacles

DIO#1

F43288

DIO#2 DIO#3

Figure 9B-4 Arrangement / Location of EM2000 Module Cabinet COMPUTER CHASSIS The computer chassis houses the following modules: 4. CPU302 (Central Processing Unit). 5. DIO300 (Digital Input/Output). 6. ADA305 (Analog to Digital to Analog). 7. MEM300 (Archive Memory). 8. COM301 (EM2000/SIBAS® Interface via RS-485 serial link). Figure 9B-4 shows the chassis with all modules in place. A metal partition separates the chassis into two separate sections. The sections exchange data over a bus contained within the backplane of the chassis. The left side holds the analog and digital Input/Output modules. The right side holds the high speed data modules such as CPU, MEM, and COM. A special service module called the Master Memory Board (MMB) also inserts to this side of the chassis when used

NOTE Notice the grounding receptacles on the left portion of the power chassis (arrow to the right of the computer chassis in Figure 9B-4). Always follow proper static precautions when handling any printed circuit boards, including: power supplies and panel mounted modules. A grounding wrist strap should be included in packaging with each new or UTEX module. The disposable strap plugs into the jack provided on the power supply chassis. EM2000 LOCOMOTIVE COMPUTER 9B-7

CPU302 CENTRAL PROCESSING UNIT The CPU302 module is the brain of the entire computer system. Housed on the CPU302 module is a Motorola 68020 microprocessor. The 68020 is a 32 bit, 16 MHz microprocessor. A math co-processor is present to further enhance the speed and efficiency of information processing.

F43303

The module includes programmable memory facilities to store operating routines and locomotive characterization data. Characterization data describes locomotive model and order specific characteristics and specifications pertinent to the operating routines. The CPU uses random access memory (RAM) on the module for “scratchpad” (temporary storage) purposes during operations. The EM2000 utilizes state of the art memory storage called “Flash PROM”. This memory can be easily reprogrammed in the field with the aid of a laptop computer communicating through an RS-232 cable or through a special module called MMB (Master Memory Board). This module is restricted to use by GMLG personnel only. The time required to reprogram the Flash PROM from a laptop computer connected to the RS-232 port on the front of the CPU module is approximately 15 minutes.

Figure 9B-5 CPU302 Faceplate The time required to load a program from the MMB is approximately 15 seconds. On the front of the CPU as well as on the DIO, ADA, MEM, COM are Fault LED’s. All of the modules in the computer chassis have LEDs mounted on the faceplate, and upon power-up, they will illuminate for a couple of seconds as part of the power-up diagnostic routine. The CPU Fault LED can be tripped by watchdog timer faults, data bus errors, or through certain conditions satisfied in software.

9B-8


0

COM301 EM2000/TCC /KNORR COMMUNICATIONS INTERFACE All four computers on board the GT46MAC need some way of communicating. The two traction computers, each called an ASG or SIBAS® Computer 16, talk to each other and to the EM2000 via RS-485 serial link. The Knorr system CRU (Computer Relay Unit) is also linked to EM2000 via RS-485 serial link. The link carries all sorts of data ranging from torque requests and feedbacks to contactor requests and acknowledgments to fault annunciation. The RS-485 is just one of the many industry standard serial interface configurations.

The module contains dual port memory for exchanging information between the control systems. A central processor on board the COM module supervises operation of the dual port memory. Exchange of information takes place at a rate of 250 kilobaud (much faster than the common 9.6 kilobaud of modems for use in personal or laptop computers).

F43304

EPROM chips, containing the program on which the on board CPU operates, are located inside the module as well. These chips are programmable, as the name implies. Unlike the EPROM chips found on 60 Series locomotives and in the Traction computers, those found on the COM301 are not intended to be changed out during the module's service life. The program burned into the chip may vary slightly from one locomotive order to the next possibly causing some operational difficulties, however, this would be noted by a different part number on the module's faceplate.

Figure 9B-6 COM301 Faceplate If a COM301 failure is suspected after troubleshooting the affected circuits, the best and perhaps only way to verify that such is the case is by swapping the module with a known good piece. Be sure to observe proper static precautions when handling modules. As always, the suspected bad order module should be tagged before swapping, and of course taken out of service if found defective.


DIO300 DIGITAL INPUT/OUTPUT MODULE The digital inputs and outputs to and from the EM2000 are handled by the DIO modules, of which there are three. Each DIO module has 24 input channels and 26 output channels. The DIO modules act as an interface between the locomotive’s 74 VDC control system and the computer’s 5 VDC system. The DIO modules are not numbered externally. To facilitate system expansion the module slots on the left side of the computer chassis are numbered from left to right. DIO modules 1 to 3 occupies slots 1 to 3 respectively (See Figure 9B-4). Furthermore, using the electrical schematic, we can also see that the number designation of the connectors (i.e. 1A, 1B, 1C, 2A, 2B) to the input/output channels also identifies the DIO slot number. F43305

A large number of the inputs are “multiplexed” (Muxed). The multiplexing allows the computer to sample groups of 16 inputs each software loop (100 milliseconds). This configuration allows a significant reduction in the number of input channels required, as each muxed input channel can support up to six inputs. In other words, what can be used to take 96 input channels can be handled with 16 input channels. We will discuss this topic later in the text.

Figure 9B-7 DIO300 faceplate It is important to remember what types of devices are inputs and outputs to/from the control system. DIO input channels - These signals are either +74 VDC or 0 VDC signals that come through switches or relay/contactor interlocks, so they are used to determine switch status (open or closed) or whether a relay/contactor is picked-up or dropped out. There is approximately 10K ohms resistance and one diode drop across an input channel terminals. DIO output channels - These signals are either +74 VDC or 0 VDC across a relay or contactor coil, so the relay/contactor is either picked-up or dropped out.

9B-10


0

DIO OPERATION BASIC INPUT - Non Multiplexed Let us look at an example of the trainline wheel slip input to the system to see how the DIO and the CPU interact. 1. When positive 74 VDC comes on the line from either the trainline or from battery positive via the WL interlock, this potential seeks a negative anywhere it can find one. In this case the only available negative to seek is through the WL 10T input channel to the computer. This signal comes in on DIO #2 input channel #21. 2. As current flows through the DIO input channel, it lights an LED on the opto-isolator which then biases (turns on), and allows current to flow through the computer’s 5 VDC circuit. Completion of this circuit then tells the CPU that the trainline 10T has gone high indicating that a unit in the consist is experiencing uncontrolled wheel slip. The communication between the DIO and the CPU does NOT show up anywhere in the schematic.

F43306

Figure 9B-8 DIO Input Channel for WL Trainline Input EM2000 LOCOMOTIVE COMPUTER 9B-11

BASIC OUTPUT Let's examine the operation of the engine governor's D Valve. The CPU energizes the coil for D Valve by completing the circuit through the coil. In order for this to happen, the computer closes the 5 VDC circuit to bias the transistor of the opto-isolator. This will then complete the circuit on the negative side of the D Valve coil, through DIO#2 output channel 16. There is also a +74 VDC feed coming into the output channel. This exists to supply gating power to the F.E.T. (Field Effect Transistor), that actually completes the circuit on the negative side of the coil.

F43307

Figure 9B-9 DIO Output Channel for Governor D Valve 9B-12


0

NOTE Do not use 74 VDC test lights, bell ringers, or analog meters to check the function of output channels directly! The rush of current through the channel to such devices will damage or destroy the module. The use of a digital volt meter is suggested.

MULTIPLEXING

F43308

Multiplexing is a process through which several inputs may be monitored through the use of only one input channel. In simple terms, selective monitoring makes this possible. In other words, not all inputs need to be monitored constantly, just periodically. After gathering these inputs in groups of 5, the CPU looks at the first signal for 10 milliseconds, the second for 10 milliseconds, and so on until it has seen all 5 inputs from the group. Once all five inputs have been checked, the CPU looks at the first signal again and repeats the loop.

In order to understand this in a more detailed fashion, lets start from ground zero and build up. One very important fact must be understood. Output channels have always been used in only one capacity in the past, which was to drive devices such as relays and coils. Now though, six output channels are used for completing paths to negative through input channels.

Figure 9B-10 Standard Input Method Figure 9B-10 shows a typical method of monitoring the status of a device (picked up or dropped out) via interlocks. In this example, once the interlock has closed, current may flow through the input channel and complete its path to negative.


F43309

Figure 9B-11 shows the same configuration with one exception; an output channel is placed in the path between the interlock and battery negative. In this example, two conditions must be satisfied for current to flow through the input channel and complete its path to negative. 1.the interlock must close. 2.the output channel in the path to negative must be energized.

Figure 9B-11 Input interrupt via output

Here lies the secret to how many inputs can be read using only one channel. Understanding this point is very important in comprehending the operation of the multiplexing circuit.

F43310

Figure 9B-12 Representation of muxed inputs.

9B-14


0 Figure 9B-12 shows a representation of the wiring connections associated with DIO #1 input channel #4. This representation cannot be seen directly in the schematic but its existence can be deduced. By looking to the same DIO-1 input channel 4 found under the column E of Schematic pages 41, 42, 43, 44, 45, and 46. Wires from the interlocks on all four B contactors run to a common point called a CMU plug before reaching the chassis connection. The CPU controls which device is providing feedback into the system by energizing different output channels. To see the input from B1, the CPU must energize DIO #1 output channel #21. To see the input from B2, the CPU energizes DIO #1, output channel #22, and so on. The timing of output channel activation is controlled by a clock in the CPU.

F43311

Figure 9B-13 CMU plugs

MULTIPLEX CLOCK: 100MS/CYCLE NOTE: “CH” MEANS DIO OUTPUT CHANNEL

F43312

Figure 9B-14 Multiplexing Software Clock.


The CPU looks at the input from each device for a 10 millisecond duration. Software programmed into the memory of the CPU runs a simulated clock to time each sample. Figure 9B-14 shows a representation of such a clock. The first 5 portions of the clock are for reading system feedbacks. For each of these 5 segments, the CPU energizes a different output channel as illustrated. Based on pre-programmed software, the CPU knows that when DIO #1 output channel #21 is on, the feedback on DIO #1 input channel #4 must be from B1. If some other interlock were connected in the place of B1 without changing the software respectively, then the status of that new interlock would be read as the status of B1. The 6th and 7th portions function in a diagnostic capacity. The remaining three portions of the clock serve no purpose.

F43313

Figure 9B-15 Schematic Diagram: Multiplex Circuit Representation As shown in Figure 9B-15, up to 16 inputs share a common output channel to complete paths to negative. So when looking at page 41 of the schematic, all inputs shown on the page will be read through their respective channels, when DIO #1 output channel #21 is turned on. When output channel is not turned on, the inputs on the page cannot be read since they have no way of completing a path for current to negative. Likewise, should output channel #21 fail in an open status, none of the inputs on page 41 could be read. This condition would be detected by EM2000 through constantly running automatic diagnostic routines.

9B-16


0 The 6th and 7th portions of the 100 ms clock mentioned previously serve a diagnostic function. During the 6th portion, the CPU turns on DIO #1 output channel #26 shown on page 46 of the schematic. When this occurs, all of the muxed input channels should see current flow through them indicating all “high” inputs to the CPU. During the 7th loop, output channels 21 through 26 are turned off meaning that the CPU should read all “low” for muxed inputs. If either of these two diagnostic routines fail, the computer logs a fault displays “MULTIPLEX CIRCUIT FAILURE” and disregards any inputs seen from these channels.

DIODE INPUT PANELS All examples so far ignore the presence of a vital component, the diode input panels or DIPs as shown on Figure 9B-16. These diodes prevent interlocks from providing paths to negative for other portions of the MUX circuit. Why are two diodes provided in series if one would do the job, one might ask? Simple, if a diode fails shorted, the unit fails on the road, placing an extra ten cent diode in the circuit provides cheap but reliable insurance against road failure.

CMU DIP

Figure 9B-16 Diode Input Panels


MULTIPLEXED INPUT CHANNEL CHART. DIO #1 OUTPUT CHANNEL 21

DIO #1 OUTPUT CHANNEL 22




DIO #1 INPUT CHANNEL 1

START

ST

SPARE

SPARE

SPARE

MXON01 MXOF01


ISOLAT

RUN

SPARE

ACCNTL

SPARE

MXON09 MXOF09


GRNTCO

VPC

GFC

GFD

SPARE

MXON2 MXOF2


EFS

FVS

BWR

WH SLP

DBNTCO

MXON10 MXOF10


FLBWCB

SPARE

SPARE

TCC2SC

SPARE

MXON03 MXOF03


DCCL

DCOP

SPARE

TCC1SC

SPARE

MXON11 MXOF11


B1

B2

B3

B4

SPARE

MXON04 MXOF04


TC1BKR

TC2BKR

GTOPS1

GTOPS2

SPARE

MXON12 MXOF12


TI1CO

TI2CO

SPARE

CNTLCB

SPARE

MXON05 MXOF05


GRD RLY

SPARE

SPARE

SPARE

SPARE

MXON13 MXOF13


SPARE

SPARE

SPARE

SPARE

SPARE

MXON06 MXOF06


FCS1

FCS2

SPARE

SPARE

SPARE

MXON14 MXOF14


FCF1AB

FCF2AB

NO LWL

LOS

SPARE

MXON07 MXOF07


SPARE

SPARE

SPARE

SPARE

SPARE

MXON15 MXOF15


SPARE

SPARE

SPARE

SPARE

SPARE

MXON08 MXOF08


MXSEL1

MXSEL2

MXSEL3

MXSEL4

MXSEL5

MXON16 MXOF16

Figure 9B-17 Multiplexed Input Channel Chart

9B-18



0

DIO INPUT/OUTPUT CHART LISTING Figure 9B-18 show the inputs and outputs from the digital I/O locator chart on page 9 of the schematic. The chart serves as a reference for determining input/output channels when the chart on page 12 of this module is not available. This information may come in handy if trying to confirm the existence of a bad input or output channel. If a bad channel is suspected, swap the suspected bad channel with another module that has an open channel, or contains a device input/output that is of lesser priority.

F43647

Figure 9B-18 DIO Input and Output Channel Chart EM2000 LOCOMOTIVE COMPUTER 9B-19

SHARED POSITIVES AND NEGATIVES Certain output channels share module borne 15 VDC power supplies. Also, non-multiplexed inputs and many outputs are grouped to share negative feeds on the module boards. In the schematic, a dotted line to -74 VDC indicates where a wire would normally need to provide a negative feed, but since a connection to negative exists on the module board, a wire is not needed. In the case of shared 15 VDC power supplies for outputs, the schematic does not even show a dotted line; these module borne connections are "understood." As explained in the section of this module on output channel operation, each channel needs a +15 VDC power supply to bias its opto-isolator when called to do so by the CPU. Rather than have each channel generate its own +15 VDC source, groups of channels share a single source. In other words, one +15 VDC supply can provide power to many channels. Figure 9B-19 shows page 49 of the schematic which represents cooling fan control circuitry. DIO #2 output channels 1-4 are all shown on this page. Only channel 1 has a non-interlocked +74 VDC feed. This channel uses the noninterlocked +74 VDC to create a +15 VDC supply which is then shared with the other channels of its group. The shared connection does not show up in the print because it is internal to the module. Should the connection inside the module fail, one or more channels would lose their +15 VDC supply and cease operation. Should wire PA125 fail to open, all channels of the group would cease to function. A few module borne defects may occur that affect the operation of output channels in a group. First, if the 15 Volt power supply being generated by channel #1 should fail, all channels of the group will now lose their ability to drive devices. Second, a faulty connection in the string carrying 15 Volt power to the base of the F.E.T. for each channel would result in the loss of one or more channels of the group. As a side note, the groups are kept to relatively small numbers of included channels in this instance, as well as those to be described in the following text. This is done with the intention of sharing load currents. The "weak link" in the circuit supplying the 74 volts to each 15 volt source is the connector pin on the rear of the module. This can withstand only a few milliamps of sustained current flow. The same holds true for the connector pins linking 74 VDC negatives (to be described next) to "sharing" points on the module boards.

9B-20


0

F43315

Figure 9B-19 Shared 15 Volt Power Supply Understood connection to shared 15 VDC power supply on module board! 15 VDC supply is created from 74 VDC on channel 1, then shared with channels 2, 3, & 4.


F43316

Figure 9B-20 Input Channel Shared Negatives 9B-22


0 The output channel groups are as follows.

Output Groups The output channel groups are as follows •

1-6

•

7-10

•

11-14

•

15-18

•

19-20

•

21-22

•

23-24

•

25

•

26

These same groups also share 2 x 74 VDC negative wires on the board. Should the connection on the board or the negative feed to the group fail, channel operation would follow as described for the similar situations in losing a +15 VDC feed. The shared negative feed is represented on the schematic as a dotted line as also can be witnessed in Figure 9B-19. Non-multiplexed inputs are also grouped into arrangements such that some will share negative feeds on the DIO module. The groups of channels sharing negatives on the board are as follows.

Input Groups The output channel groups are as follows •

1-8 do not apply since they read muxed inputs

•

9-17

•

18

•

19

•

20

•

21-22

•

23-24

Again the same scenario applies as explained before with the loss of continuity in the different connection points. Figure 9B-20 shows page 58 of the schematic which demonstrates the dotted line representing the shared -74 VDC.


NOTE In simple terms, the schematic does not indicate in any way the shared +15 VDC. Dotted lines represent the shared 74 volt negative feeds

ADA305 ANALOG TO DIGITAL TO ANALOG MODULE The ADA modules are responsible for accepting all analog inputs (0 to 10 VDC) into the computer, which it converts into digital representations that the CPU can understand. It is also responsible for converting digital information from the CPU into an analog signal that is required by the receiving device (Tractive Effort Meters and Speedometers). Figure 2.28 shows the analog input/output locator chart from page 9 of the schematic. All of these signals are received by, or are sent from the ADAs except for the SCR outputs (from FCD) and the traction motors speed and temperature feedback signals (to SIBAS computers). In most instances, these signals do not feed directly into the ADA. They may feed through the PDP (Power Distribution Panel or also referred to by some people as the TDP - Transducer Distribution Panel). Some signals are conditioned through the ASC module (Analog Signal Conditioner). The ADA inputs and outputs are shown in the schematic on pages 17 through 22. As with the DIO modules, the ADAs are not numbered externally. Looking at the computer chassis, it is split in the middle by a metal partition. The left side houses the I/O handlers ADA and DIO. The modules have not been numbered for facilitating expansion at a later date. The module slots on the left side are numbered from left to right. DIO modules occupy slots 1, 2, 3 & 4. The ADA module occupies slot 7. A signal that comes into a chassis connector labeled 7A-** (**stands for some letters) runs through the ADA in slot 7 (closest to the CPU.

Figure 9B-21 ADA Faceplate

9B-24


0

F43318

Figure 9B-22 EM2000 Module Chassis Slots


F43648

Figure 9B-23 Analog Input/Output Locator Chart. 9B-26


0

ADA SIGNAL CHART ADA Module Signal Designation CA V GBLWZA GRID1A/GRID2A DCLV MGFLD A RADAR ETP1/ETP2 TM AIR EPU RPM TPU RPM LDMETR MG CT A TL 24T

BAR PRS TCC1A/TCC2A MPRES LR SPD METER

Signal Description Companion alternator voltage signal from FCF module. (ADA input) Dynamic brake grid blower current signal from sensor. (ADA input) Dynamic brake grid current signals from sensors. (ADA inputs) DC link voltage signal from sensor. (ADA input) Main generator field current signal from sensor. (ADA input) Speed signal from radar transceiver. (ADA input) Engine temperature signals from coolant temperature probes. (ADA inputs) Traction motor cooling air temperature signal from probe. (ADA input) Diesel engine speed signal from ENG SP MAG PU. (ADA input) Turbo speed signal from TURBO MAG PU. (ADA input) Tractive/Braking Effort signal to load meter. (ADA output) Main generator output current signal from ASC module. (ADA input) Trainline 24T voltage signal from ASC module. (ADA input) Ambient air pressure signal from barometer. (ADA input) DC Link current signals from sensors (ADA input) Main reservoir pressure signal from sensor (ADA input) Load regulator signal from ASC module (ADA input) Locomotive speed signal to speed indicators (ADA output)


MEM MEMORY MODULE

F43319

The memory module is responsible for storing Fault and Running Total data. It has 128K of memory. The memory allows for detailed fault storage. For selected faults, such as ground relay, data is stored from each of the 5 seconds BEFORE the fault occurred. This information will assist shop personnel in determining the cause of defects. The memory module also stores some "operational" data needed by the CPU. For example, the RADAR Recalibration Ratio is calculated only once per day and stored in memory. This signal can only be calculated under a very specific set of operating parameters. If power to EM2000 is lost, this data must be retained so that effective/aggressive wheel slip control can be maintained when the system reboots. Since the CPU cannot write information to memory resident on its board, the data must be stored here. The memory on this module is RAM memory, so it requires battery backup. Lithium batteries are used for battery backup. No part number for the battery has been issued to date. The EM2000 will not operate properly with low or no battery set. When battery voltage does begin to reach a critical level, a fault is logged in the EM2000 archives. As all of the modules are sealed units, there is no provision at this time for field changeout of the batteries. The EM2000 will allow download the data on the MEM module to the MMB module, for in depth analysis by the appropriate personnel. No written procedure is available on this at this time.

Figure 9B-24 MEM300 Faceplate.

9B-28


0

PANEL MOUNTED MODULES Many more modules belonging to the EM2000 control mount directly to the rear panel of the High Voltage Cabinet. For this reason, they are collectively called "Panel Mounted" modules. These components interface directly with either the "noisy" 74 VDC analog systems, or the high voltage circuits on the locomotive. They mount separate from the chassis for the purpose of voltage and electro-magnetic isolation from the microcomputer. Figure 9B-25 shows the mounting of the panel.

F43287

Figure 9B-25 Arrangement/Location of Panel Mounted Modules.

ASC300 ANALOG SIGNAL CONDITIONER MODULES The ASC serve to condition analog feedbacks into DC voltage signals that can be handled by the ADA. It also serves to provide +5 VDC power to the Barometer.The signals that are conditioned by the ASC are: 1. MG CT A (main generator current transformer amperage). 2. TL 24T (dynamic braking input trainlined on pin 24). 3. LR (load regulator signal).


The faceplate contains test points where scaled/filtered feedbacks can be measured with a hand held meter. The power supply for the barometric pressure transducer can also be checked. The test points are labeled as follows: 1.+5V (check with respect to CGND) - This is the 15 to 5VDC stepped down power supplied to the barometric pressure transducer. F43320

2.+15V and -15V (check with respect to 15 VCOM) This is the power supply for the circuitry that converts the 15 VDC signal to 5 VDC for the barometric pressure transducer. 3.IMG (check with respect to CGND) - This is the rectified signal from the MG current transformers. The scale factor is 756 A/V. 4.24T (check with respect to CGND) - This is the brake handle position. 0 VDC = Min. Brake 9 VDC = Max. Brake. 5.LR (check with respect to CGND) - This is the load regulator feedback. 0 VDC = Max. Field 9 VDC = Min Field.

Figure 9B-26 ASC300 Faceplate

Figure 9B-27 of the following page shows how the ASC300 appears in the schematic connecting to the ADA, barometer, Main Gen. CTs and TL 24T. Notice that the ASC module's only relation with the barometer is for power supply; feedback from the barometric transducer runs straight into the ADA 305.

9B-30


0

F43321

Figure 9B-27 ASC Module in Schematic FIRING CIRCUIT/SCR CONTROL There are two ways to control the output of a rotating machine: 1. Regulate the rotational speed. 2. Regulate the excitation to the machine's field. Since Main Gen. output must vary widely and change within milliseconds, changing the rotational speed of the diesel is not practical. Therefore, the method by which the CPU controls the locomotive's electrical load is by regulating Main Generator field (or excitation) current. Excitation for the Main Generator comes from the Companion Alternator. The Companion Alternator receives its excitation from the Aux Gen. which is 72.5 to 77.5 VDC, depending on temperature only. In other words, the output of the CA cannot be regulated. So, in order to regulate the output of the Main Generator, we find a method to pass a selective amount of power from the CA to the Main Gen. fields. A diesel electric locomotive uses a special type of conductor called a Silicon Controlled Rectifier or SCR to achieve this end.


An SCR is a diode which can be given a signal to conduct. The SCR will not conduct until it receives this signal and will continue to conduct until forward voltage across the circuit element goes to zero or less. Recall that the CA output is alternating current and an SCR placed in its path will conduct only when it is forward biased and the "turn-on" signal has been given. So if we place the SCR in the path of the CA output, then regulate the time past positive-going zero cross of the CA output at which the "turn-on" signal is given to the SCR, we can regulate Main Gen. output. Figure 9B-28 below shows how variable gate signals produce variable amounts excitation for the Main Generator.

F43322

Figure 9B-28 Variable SCR gating RED indicates a low amount of excitation passes by SCRs. GREEN indicates a medium amount of excitation passes by SCRs. BLUE indicates a high amount of excitation passes by SCRs. The CPU must have certain data concerning Companion Alternator frequency in order to perform the task described above, but we cannot bring CA output into the EM2000 chassis because of electro-magnetic interference and other complicating factors. Furthermore, the CPU operates on a low scale nowhere near the power level required to turn on an SCR. For these reasons, two panel mounted modules serve as interface between the excitation circuit components and the CPU. These modules are FCF301 which handles CA frequency data and passes it to the CPU, and FCD300 which takes weak "turn-on" signals from the CPU and amplifies them for use in triggering the SCRs.

9B-32


0

FCF301 FIRING CIRCUIT FEEDBACK MODULE

F43323

The FCF is responsible for providing feedback from the Companion Alternator to the CPU. The information includes per phase output of the CA and the resultant of the 3 phases combined. This module contains the zero cross detection circuitry. This circuitry determines when the sine wave for each companion alternator phase crosses from the negative half-cycle into the positive half-cycle. When the zero line is crossed, the FCF tells the CPU module in the computer chassis that a phase has crossed zero. Based on this signal, the CPU counts the amount of time necessary before generating a weak gate pulse at the proper phase angle for a given load request. The module faceplate has the following test points: 1.CA1, CA2, CA3 (measure with respect to each other) - These represent the phase to phase voltages coming from the CA. 2.GEN A, GEN B, GEN C (measure with respect to 15V COM) - These are 5 VDC square wave pulses generated by the FCF and sent to the CPU each time the respective phase crosses zero.

Figure 9B-29 FCF301 Faceplate 3. CAV (measure with respect to 15V COM) - This is the composite sent to the ADA representing actual CA output. The scale factor is 31 VAC output/ VDC measured. 4. +15V, -15V (measure with respect to 15V COM) - This is the reference voltage for the module's zero cross detection circuitry.


FCD300 FIRING CIRCUIT DRIVER MODULE This module contains the gate amplifier circuitry needed to amplify the weak gate signals that are sent from the CPU module to the FCD. The amplified gate signals are then sent out to the SCR assembly. Power for the gate amplifier circuit is the threephase AC output of the Aux Gen.

F43324

The module face plate bears the following test points: 1.GD1, GD2, GD3 (measure with respect to the corresponding CM test point) - This is the amplified gate signal being sent to each SCR. 2.CM1, CM2, CM3 (see above) - These are the commons for the respective gating signals for each SCR. 3.SCR1, SCR2, SCR3 (measure with respect to the corresponding RTN test point) These are the weak gate pulses sent by the CPU to the FCD still needing amplification. 4.SCR1 RTN, SCR2 RTN, SCR3 RTN (see above) These are the commons for the respective weak gate signals.

Figure 9B-30 FCD300 Faceplate The FCD also has a green LED on its faceplate. This LED illuminates to indicate that gate amplifier power is present. Both the FCF and FCD appear in the schematic in more than one place. The FCD appears with the Aux. Gen circuitry to show the three-phase power connection and also in the SCR gating circuitry with the Main Gen. field. The FCF appears in the CA circuitry where it monitors CA output. Figure 9B-31 shows the FCD and FCF with their connections to CPU, ADA, and power chassis as well as their test points.

9B-34


0

fIG 2.38 STD.TXT

Figure 9B-31 FCF & FCD Interface with EM2000 Chassis TRAINLINE INPUTS

F43325

Figure 9B-32 27 Pin M.U. Receptacle. Inputs into the computer that come through the 27 pin M.U. cable first go through another module called the TLF301 (Trainline Filter Module) mounted on a panel behind the computer chassis. This module merely conditions the trainlined inputs to make the input channel interpret the inputs exactly like an older relay logic-equipped locomotive would. EM2000 LOCOMOTIVE COMPUTER 9B-35

Figure 9B-32 shows the M.U. receptacle pin out. Notice how each row of pins is numbered from left to right just like reading a book. When checking for a signal on the cable with a meter, test light, or other device, place the leads between pin 4 Negative Control (battery negative) and the signal being measured. Some of these signals can also be measured in the High Voltage cabinet at the faceplate of the TLF301 module as explained in the following text.

TLF301 TRAINLINE FILTER MODULE The TLF allows trainlined digital signals to be interpreted by the EM2000 in the same manner as older locomotives.

F43326

On older locomotives, the 74 VDC relays would pick up at approximately 35 VDC. The input channels on the DIO modules will go high (bit status "1" = ON) at approximately 25 VDC. In order for the input channels on the DIO to act like a relay, we need to add the TLF channel to "fool" the DIO into acting like a relay. Inside the TLF is circuitry that lowers the input voltage into the TLF by 10 VDC.

Figure 9B-33 TLF Faceplate So on the positive side of the TLF, if the voltage is 35 VDC, the voltage on the negative side of the TLF channel is 25 VDC applied to the positive side of the DIO. So, this circuitry keeps the DIO channels from going high erroneously if it is MU’d in consist with older power that may have stray voltage on the trainlined circuit. It is important to notice that only some of the trainline inputs to the CPU are filtered by this module. A total of 27 possible inputs exists on locomotives, but only 12 signals are filtered by the TLF. The module has testpoints as outlined in the following table.

9B-36


0

Test Point

Signal Name

Trainline

IN1

Alarm

2T

IN2

D Valve

3T

IN3

Generator Field

6T

IN4

C Valve

7T

IN5

Dir. Contl., = F

8T

IN6

Dir. Contl., =r

9T

IN7

Tractive Effort Limiting.

14T

IN8

B Valve

12T

IN9

A Valve

15T

IN10

Engine Run

16T

IN11

Db Set Up

17T

IN12

Db Excitation

21T

-74V

-74 V Reference

4T

Figure 9B-34 TLF Channels with Test Points.


DVR300 DIGITAL VOLTAGE REGULATOR

F43327

In order to assure a stable output from the Auxiliary Generator, a regulating device controls the amount of excitation current passed to its fields. EMD locomotives built in the past 20 years employed a Dash 2 style voltage regulating module. Variations of this module have included manually adjustable output, output varied based on battery airbox temperature, and narrowing of the tolerable output range. All versions to date have implemented purely analog circuitry. The newest breed of voltage regulators is called DVR (Digital Voltage Regulator). This device is a standard panel mounted module similar to TLF301, ASC300, etc. Internally, the module departs greatly from past VR designs, but externally the module still provides test points to monitor 3 phase Aux Gen. output, battery voltage, battery charging voltage, and Aux Gen. Field voltage.

Figure 9B-35 DVR300 DVR regulates Aux Gen. field based on battery box air temperature. If the 74 VDC system is drawing heavily on the Aux Gen., and DVR cannot supply additional excitation to meet the power demands, DVR requests that EM2000 increase diesel speed by sending a signal to DIO2 input channel 24 (XAGLOD). When cranking the diesel, the DVR receives an “inhibit” signal from EM2000. DVR works with a new battery temperature probe, (BTA) and has the ability to recognize and store faults as well as communicate through a serial port with EM2000 (this potential is not currently utilized). In the event of 74 VDC system overvoltage, the DVR takes several actions to rectify the situation, last of which removes it from the circuit and ceases Aux Gen. excitation by tripping the AUX GEN. FLD circuit breaker. DVR only passes excitation current when the diesel is running, the module watches for 1.5 VAC phase to phase on Aux Gen. output to determine if such is the case. As the Aux Gen. ages, residual magnetism of the machine falls very low meaning that Aux Gen. output may fall below the 1.5 VAC DVR requirement.

9B-38


0 If this happens, perform the following steps: 1. With the Locomotive's Isolation Switch in run, "Engine Run" and "Control & Fuel Pump" switch closed (up), "Gen Field" switch open (down), reverser handle centered, advance the throttle handle step by step until the "No Companion Alternator Output" message no longer displays. 2. If the message never goes out when the throttle handle is advanced to TH8, Flash" the field by connecting a 30 watt test light from the negative side of RE4A (Wires AGBI & AGB2) to Battery Negative. Advance the throttle as in Step 1 until the, "No Companion Alternator Output" message no longer displays. 3. If the message does not clear, renew the Aux Gen.

F43328

Figure 9B-36 DVR300 In Schematic EM2000 LOCOMOTIVE COMPUTER 9B-39

VOLTAGE REGULATION The DC voltage on this locomotive will vary from 77.5 VDC at 0°C (32 °F) and fall linearly to 72.5 VDC at 37°C (100 °F). This allows additional charging voltage when the batteries are cold and require it, and keeps from boiling them with excessive charging voltage when they are warm. The DVR module is responsible for regulating the charging voltage depending on the feedback received from a temperature probe called the BTA (Battery Temperature Ambient). Figure 9B-36 shows the BTA input circuitry. Figure 9B-37 shows the probe inside the battery box. The probe looks like a long silver stem protected by a metal shield on three sides.

F43329

Figure 9B-37 BTA In Battery Box This signal is used inside the DVR module circuitry to generate a reference voltage called AGV Ref, which is 1/10 of the charging voltage. The chart in Figure 9B-38 shows the output voltage, and its correlation to BTA probe input and AGV Ref voltage. If the BTA probe fails, it will fail in one of two ways; open or shorted. The DVR will set charging at 74 VDC.

Temperature

BTA probe input voltage

AGV Reference voltage 1/10 of charging voltage

Charging voltage T.P. 1 to 14

<0° Celcius

< 4.2 VDC

7.8 VDC

77.5 VDC

0 - 37 ° Celcius

4.2 - 4.8 VDC

7.8- 7.2 VDC

77.5 - 72.5 VDC

> 37° Celcius

>4.8 VDC

7.2 VDC

72.5 VDC

Figure 9B-38 Aux Gen. Charging Voltage.

9B-40


0

THE EM2000 DISPLAY The Display Diagnostic System (sometimes referred to as DDS or just “display”), was designed to be “user friendly" for operating and maintenance crews having little or no computer experience. The explanations given in this section should not cause concern over complexity of the display. Its use is much easier than details contained in this section might imply.

THE MONITOR The monitor portion of the DDS is a 6 line read out of information and/or instructions for the user. Each line can contain up to 40 characters (letters, numbers, symbols). A timer is built into the software controlling the display. This timer keeps track of how much time has passed since someone has pressed a key. If the timer counts down all the way and no activity on the keys has taken place, the display will “time-out”, or enter its screen saver mode to preserve life. If the display does “time-out,” the information on the screen prior to going blank does not get lost or thrown away. The next interaction with the keypad will immediately restore all data to its original position on the screen. Note that the initial keystroke serves only as a "wake up call" and is otherwise ignored by the display. When first boarding the locomotive, check to see that the computer is turned on. If the display is blank or “asleep” when the EM2000 is on, pressing any key will “wake it up.”

F43330

Figure 9B-39 Diagnostic Display System EM2000 LOCOMOTIVE COMPUTER 9B-41

THE KEYPAD The keypad contains 16 keys in total. Four of these keys, (F1, F2, F3, & F4) called function keys, are used to perform operations shown in the space of the display directly above them at any particular moment. If an option does not appear above that key in a particular screen, then it serves no purpose for that screen. For example, in the Main Menu, the SELECT option corresponds to the F3 key, EXIT goes with F4, and F1 & F2 serve no purpose. In the center of the keypad are four arrow keys (right, left, up, & down). The arrow keys are used to move the cursor (pointer on either side of the item) to different locations on the display. On some screens, the arrow keys will serve no purpose. Two keys (BRIGHT & DIM) can be used to vary the brightness of the display. The illumination can be set to 3 levels, bright, medium, and dim. The brightness can be adjusted at any time in any screen. These keys serve no other purpose. The ON/OFF button is used to turn the display on or off. This can be done from any screen. The screen may turn on by itself if the computer has a Crew Message to send. The HEP button provides information on the Head End Power generating unit. Since this is only used on passenger locomotives, the key serves no purpose on this particular locomotive. The button marked MAIN MENU will automatically send the display back to the “Main Menu” screen from any other screen. This key can come in handy if the user “gets lost” in the display and can’t find home or the Main Menu. Pressing CREW will display any crew messages that are currently active. Only one crew message at a time will be displayed. By doing so, the display can help the user through a fault that requires something to be reset or cut out by tailoring the function keys to the particular message. If more than one message is active, the display will note as such. Some crew messages, such as that demonstrated below, will log faults in the archives along with them. Others, such as “INCREASE ENGINE SPEED - TRACTION MOTOR COOLING” will leave no trace of existence once the condition has subsided.

Crew Message #2 of 3 MESSAGE CODE: 179 NO LOAD - IMPROPER GFC STATUS PREVIOUS I

NEXT I

EXIT I

The HELP key signals the display to provide the user with assistance pertaining to the information currently being displayed. The assistance may be in the form of a more in-depth explanation of the message or a set of directions.

9B-42


0 Finally, the SLOW SPEED key will provide further instructions if needed for “Slow Speed” operation, and then initiate the screen needed to operate the locomotive in this mode. Slow Speed is similar to the pace setting devices used at train loading/unloading facilities such as coal mines. The key serves no purpose on this paticular locomotive.

USING THE DISPLAY AS AN EFFECTIVE TOOL To receive the full benefit of built in diagnostics, the user must understand how to efficiently use the interface to the system which, in this case, is the display. Many screens exist inside of other screens, continually branching off much like a tree. For the user, finding his way through the various screens may be quite tedious and confusing, therefore familiarization with the layout and structure of the screens is highly suggested. Once again, familiarization comes through hands on experience. Operators and maintenance personnel alike are strongly encouraged to peruse the screens at their convenience. Below is the Main Menu for the display system. This is essentially the "home base " when operating the system. From here, the screens branch out in various directions to perform different services.


EM2000 MAIN MENU ARCHITECTURE 1st page Data Meter Progam Meter (5) Dyn. Brake Starting System Digital I/O DIO1-DIO2-DIO3 IN/OUT MUX ON/OFF Multiplexer Power Data Creep Control Cooling System Self- Tests

Fault Archive

Air Brake Test DCL Shorting Test Self Load Excitation / SCR W/S Contactors / Relays Cooling Fans Radar Meters Wheel Flange Lube TCC Blowers Display Archive Faults Send to RS232 Clear Annunciator

Running Totals Show on Display Send to RS232 Start / Stop Trip Monitor Traction Cut Out Truck #1 Truck #2 Unit Information English / Metric Locked Wheel Detection 2nd Page Maintenance Air Test Setup TE Li i i 9B-44


All Archives {data packs} Since Annunciator {data packs}

0

MAIN MENU ITEMS UNIT INFORMATION This screen provides statistical information such as road number, date, time, software ID. #, barometric pressure, etc. If a unit is continually limiting horsepower due to low barometric pressure, this is an easy place to quickly qualify the output from the barometer.

TRACTION MOTOR CUTOUT Prior to the 70 Series locomotives, traction motors could only be cut out singly, or in sets by use of a rotary switch mounted on the Engine Control Panel. With the EM2000 on the GT46MAC, though, three motors at a time must be cut out. This is known also as inverter cutout. As with other units, the amount of power available from the locomotive will be limited approximately proportional to the number of motors cut out. However, the ability for the unit to function in dynamic brake with motors cut out will remain, unlike conventional DC locomotives. When a TCC is cut-out, grid path #1 is the default grid path in use unless there is a problem such as a grid path #1 blower failure, open/shorted grids. In that case, the computer will use grid path #2.

SELF TESTS The Self Tests option is the first example of a sub-menu. Selecting the Self Tests option will give a screen with several new options. Each of these options allows the user to exercise various locomotive subsystems to verify proper function. Many of the tests performed are a simple go/no go evaluation. Tests that can be run include RADAR, contactor/relay, self load, excitation, wheel slip, cooling fans, speed meters, load regulator, and wheel flange lubrication. All tests have an initial screen called “Entry Conditions” telling the user the required status of various switches prior to beginning the test. . -Entry Conditions to Contactor TestReverser handle centered, unit is not moving, engine is not running, C/FPSW switch is up, and all circuit breakers located in the black panel are up. CONTINUE I

I

I

EXIT

For example, to test GFC, the engine must not be running, otherwise the unit will begin loading. The following text will give a short explanation of each test and its intended use.


SELF LOAD Self Load, or Load Test as it is more commonly called, connects the output of the Main Generator across the dynamic brake grid resistors. Self Load provides a quick and easy method of loading a unit without moving it. The test can be a fountain of valuable information revealing engine troubles such as low horsepower, smoke in the exhaust, and hunting under load, as well as some electrical problems. Since Self Load also sets the unit into near operational loading conditions (as far as contactors picked up and where power flows), the test can help troubleshoot electrical problems such as ground relay pick up. During the test, the display provides the user with a default data screen including information such as horsepower, throttle position, load regulator % of maximum field, Main Gen. volts, etc. Screen options available to the user are Load Test #2, Overriding Solenoid energize, and a Meter Menu. CONTACTORS/RELAYS This test will give the user the ability to test all contactors and relays (listed below). They may be checked all at once, each individually, or in individual groups such as switchgear. If a particular test fails, the EM2000 computer will hold its output to energize the device in the “on” or “high” position so that the circuit can be diagnosed further. This is a new feature made possible by the EM2000 computer. Once the user is ready to move on to another test, he can tell the computer by pressing the appropriate button as instructed by the display. At this time, the computer will de-energize the output and resume operation as commanded by the user.

NOTE Note that corrective actions made while troubleshooting a circuit powered from an output being held "high" by the computer will cause devices to pick up. This means that making connections will draw an arc! Granted these voltage levels are relatively low and current flow is not particularly high, the uninformed troubleshooter may get quite a scare if an arc is drawn, while Fast-Ons & terminals may be damaged. It is suggested that the Contactor test be exited before any corrective actions to the defective circuit are made.

Below is a listing of devices checked by the Contactor/Relay Test.

All B contactors

GFC and GFD contactors

BWR relay

All fan contactors

All switchgear

FP relay TLPR relay

9B-46


0 EXCITATION/SCR CIRCUIT New for the GT46MAC locomotives is an excitation circuit/SCR Bridge test. The The test actually checks that specified SCR firing angles deliver the appropriate Main Generator field currents. The test can uncover common failure modes such as a bad SCR, incorrect phase rotation, failed gate drivers and wiring errors. The computer actually performs several smaller tests within the greater Excitation general test. The first six of these tests are to check each SCR individually for functionality. When the display says that a particular SCR is turned on, the Main Gen. field current should climb to about 10 Amperes, and gradually fall to zero when the SCR is turned off. When the computer is no longer attempting to hold the SCR gate open, the field is given a few seconds to decay since the machine is highly inductive. Once each SCR has been tested individually in both the on and off states (totaling 6 tests), the computer decides whether or not to proceed with the multiple SCR firing portion of the test based on the results of the first six trials. If any of the first six tests have failed up to this point, the user will be notified accordingly at this time and will be given the option END TEST. During the multiple SCR firing portion of the test (tests 7 through 10), the computer attempts to fire the SCRs at various angles while monitoring the field current produced. As with the first six tests, many opportunities for failure exist. In the event of a failure, the user is notified through the monitor and given a few suggestion for troubleshooting the cause of the failure. Keep in mind that the suggestions provided are just that - suggestions. The computer has no way of knowing whether or not a particular device has failed. Tests 7-10 and expected results are outlined here.

Test 7 8 9 10

Angle 90° 146° Full On Full Off

Field Current 60 Amperes 10.2 Amperes 119.5 Amperes 0 Amperes

% Error Allowed 25% 25% 10% Within 2 Amperes

If the system passes all portions of the test, the user will be notified by a message on the screen.


COOLING FANS The cooling fan test is designed to verify proper operation. The automatic portion of the test turns on each fan at both low and high speed, one after the other, allowing enough time for the operator to visually observe the fans rotating in the various settings. The individual test portion allows the user to test operation of a selected fan and selected speed. Time delays between pick up of the associated contactors is necessary during the automatic portion of the test so the user can verify proper fan rotation, because confirming that a contactor has picked up gives no assurance that the fan is actually running as required. At the completion of any of the tests, the monitor shows a message indicating either a particular fault status or a successful run. RADAR This test will exercise the RADAR transceiver, wiring connections and the computer’s ability to correctly process the RADAR feedback signal. During the test, the transceiver sends the computer a 1000 Hz, 8 VDC square wave which translates to a speed very near 45 MPH (22.2 Hz/MPH). These units come equipped with the new K-band RADAR modules. If the speed signal exceeds 1.5 M.P.H. during the first 5 seconds of the test, the test is immediately ended, and the user is notified of a possible transceiver mounting problem allowing vibration. Upon successful completion of the first portion, the test continues and looks for a stable speed signal between 40 and 50 M.P.H. As usual, the user will be notified of either possible difficulties, or successful operation upon test completion. Note that the mounting angle for the K-Band RADAR Transceiver is 37.5° between the rail (not the underframe of the locomotive), and the module. WHEEL SLIP This test causes the Wheel Slip light on the engineer’s control stand to be illuminated by picking up the WH SLP relay. This test fulfills FRA requirements that a locomotive have the ability to prove that it has a functional wheel slip warning system. When the test is in progress, the display informs the user to check the control stand indicator as the WH SLP relay has picked up. Once operation of the indicator has been checked, the test can be ended as usual by pressing the button assigned by the display. If the user does not manually end the test after 15 minutes, the screen automatically returns to the “Entry Conditions” screen. METERS TEST This test is used to verify speed meters and Tractive / Braking Effort Meter Operation. During this test: The speed meters reading incrments by step up to full meter scale. At first, the Tractive / Braking Effort Meter needle goes to full scale in the tractive effort portion and the Tractive Effort LED comes on, then, the needle goes back to 0 to full scale in the braking portion of the meter.

9B-48


0 WHEEL FLANGE LUBE TEST This test is used to verify the wheel flange lubricating system operation. Once the test start button is pressed, the computer sets a time delay to allow the user to go to axles 3 and 4 nozzles. The user can verify that the nozzles do spray lubricant by placing a sheet of paper in front of the nozzles. EM2000 activates the nozzles about 10 times during the test. FAULT ARCHIVE The EM2000 has the ability to record abnormal events during operation. These events are commonly referred to as faults. When a fault occurs, data packs (certain feedback signals to the computer that might help the troubleshooter determine the cause of a fault), are stored in the computer’s battery backed up memory. The memory back up battery is part of the memory board so even if power to the computer is lost, the data in the archive will be protected. The entire archive capacity, the amount of data stored with each fault, and the method in which the data are recorded represent major differences in the archive systems. The EM2000 computer has an archive memory capacity of 128K. This capacity allows for a great number of faults to be stored, and for additional information with each fault. Data is recorded before corrective action is taken. Additionally, certain types of faults will provide data packs at 1, 2, 3, 4, & 5 seconds prior to the fault, as well as at the time of the event. This is made possible by a FIFO (first in first out) data storage buffer.

FIFO#1

Figure 9-40.FIFO Data Storage Buffer The "first in first out" or FIFO data storage buffer is illustrated in Figure 6.2. This particular buffer contains five separate spaces for groups of data. In the illustration, the spaces are labeled A, B, C, D, & E, with space A being the space to always receive new information, and E being the space to always eject old data. Figure 6.3 shows the first set of data being brought into the buffer as it is captured. The data set is placed into space A until a new set takes its place one second later. Before this occurs, though, the data from space A gets bumped to the right one space into B, as shown in Figure 6.4. After a data set has been bumped 4 times, it occupies the E space in the buffer. The next bump will cause the data set to be ejected from the buffer as shown in Figure 6.5. EM2000 LOCOMOTIVE COMPUTER 9B-49

This data is no longer stored in any type of memory anywhere. This bumping continues until a fault condition on the locomotive is detected by the CPU. When a fault condition is detected, all data sets in the buffer as well as the set waiting to enter the buffer, are immediately copied to or "dumped" to the MEM300 archive memory module. This data buffer dump is illustrated in Figure 6.6. It is important to note that the information in the buffer cannot be erased during this process in case one fault were to occur immediately after another.

FIFO2

Figure 9-41.Data Set Moved into FIFO Buffer

FIFO3

Figure 9-42.New Set Bumps Old Set

FIFO#4

Figure 9-43.Data Set Gets Bumped Out After Five Seconds 9B-50


0

FIFO#5

Figure 9-44.FIFO Data Buffer Gets Dumped to Memory Upon Loco. Fault Detection The computer samples the feedbacks every second. If no faults occur for five seconds, the data recorded five seconds ago is pushed out of the buffer to make room for the data being sampled at the present moment. If a fault condition occurs at this instant, the entire buffer is dumped to the fault archives before corrective action is taken. The archive can be downloaded from the computer to a laptop computer or serial printer.

Information flows through the RS-232 port on the CPU 300 face to the remote device. During this download, the display is not dynamically updated. Because of this, data can be acquired in a timely manner. Also, small groups of data or only particular faults specified by the user may be downloaded. When viewing a particular fault, simply selecting the PRINT option will automatically transfer all fault related information to the device on the other end of the RS-232 interface. Faults will be logged regardless of terminal connection.


In the interest of saving space, redundant faults will not be archived. Once a particular fault has reached its quota of faults for one day (starts at midnight), the computer recognizes the redundancy and no longer records data for the fault. The record of the number of times to date that the fault has occurred, however, will be incremented by one, as usual, for each subsequent event. Up to 999 occurrences can be counted in each day. METHODS OF DISPLAYING THE ARCHIVE When the user selects the archive viewing menu, he is given 4 fault retrieval modes to select from.

fault archive display menu

The first is to review all records in the history beginning with the newest and paging back through time. The second option is to view the faults sorted by class. When recorded, each fault is assigned a class such as Feedback, Ground Relay - Power, Improper Loading, etc. Again, the faults would be viewed in reverse chronological order. Every fault logged is assigned to a particular class. Third is to review all records newest to oldest until the annunciator was last reset. The reset date is defined when the user selects that option from the main archive menu. The annunciator is useful for viewing only those faults which have occurred on a particular trip, or over a certain time period. The final mode consists of a user selectable record. This feature prompts the user for a particular date (providing the last annunciator reset date as a default). Once the date has been entered, the first archive record whose date is equal to or newer than that requested will be retrieved. From this point, the user can begin to scan forward to the newest record. DATA PACKS Many faults recorded in the archives will have a data pack stored along with them. A data pack is a series of values, contactor statuses, etc. associated with an event collected by the computer and stored when the event occurs. If an event has a data pack associated with it, it can be one of two types: a time span collection, or a fault moment collection. A fault moment collection is a single pack of values, each recorded within milliseconds of the other.

9B-52


0

If a user chooses the DATA option when viewing the fault message as shown above, the values will be shown on a screen similar to the following:

Some data packs will include enough values to require two pages or screens. In such a case, the user will be given the NEXT option on page 1, and the PREVIOUS option on page 2 for viewing the alternate screens. A time span collection of data will include data similar to the items listed in the moment collection, however, as the name implies, the data will be recorded over a time span. Specifically, data is recorded at 0, 1, 2, 3, 4, & 5 seconds prior to the fault. Again, some packs will include enough data to require two pages or screens for each second or moment. The time span selection screen will look similar to the screen shown below.

Choosing the NEXT option will show the next screen, allowing selection of fault data 4 and 5 seconds prior to the fault. Pressing SELECT will choose the pack of information highlighted by the cursor (0 seconds in this example). Pressing EXIT will return the user to the screen that initially listed the fault. EM2000 LOCOMOTIVE COMPUTER 9B-53

DATA METER The purpose of the data meter is to give the user information about the operation of the locomotive and the computer in a real-time fashion. The user is able to see various digital I/O, analog feedbacks and computer-derived variables. To make signal selection easy, yet versatile, several predefined meters exist in ROM, which means they cannot be altered by the user. In addition, the user has the ability to compose “custom” meters with the signals he selects.

The next few pages will show the various predefined meters available to the user and explain the use of the Digital I/O and Programmable meter selections.

POWER SCREEN

Note the options at the bottom of the screen. The user has the opportunity to make “screen dumps” to a remote device such as a serial printer or lap top computer that is connected to the serial port of the CPU 300 module. The instant the PRINT key is pressed, the display takes a snapshot of all data on the screen and sends it off to the remote device. Snapshots can be taken nearly as frequently as the user’s finger can press the button. This feature is particularly useful in capturing data leading up to, directly following, or at the instant of a particular event. The following shows examples of some of the other screens.

9B-54


0 DYNAMIC BRAKE

CREEP CONTROL

STARTING SYSTEM

COOLING SYSTEM


DIGITAL I/O

This is the menu that comes up when the user selects “Digital I/O” from the meter menu. From this screen, a particular module’s inputs or outputs may be chosen for monitoring. Upon selecting one of the “DIO Inputs” options on this menu, the next menu appears similar to that shown below.

Choosing one of the first three items on this list will yield a screen similar to the one below. Since each input channel can handle up to five variable inputs (plus 2 diagnostic) as explained in the multiplexing section of Module 2, each column of the screen is dedicated to a particular channel. A blank space in any column indicates that the channel monitors no input during that particular snap shot. Choosing the last item on the menu list will show a screen laid out similar to the one shown below, however the signals monitored are those which are “hard wired” into the DIO modules rather than the multiplexed type.

9B-56


0

If the user selects one of the “Outputs” options from the DIO Module Menu, the following screen will appear.

Choosing the first one of the two options available here will yield the next screen shown below. Remember that only certain input signals and no output signals are multiplexed. Since all signals are hard wired, each channel has its own dedicated space on the display. The location of the channels is represented in the example. The layout is similar to the dedicated input channel layout.


RUNNING TOTALS This function of the display stores assorted locomotive performance data in nonvolatile memory. Data stored includes, but is not limited to, distance travelled and time operating at various power levels and operating modes. The information accumulates over the lifetime of the locomotive and can also be reviewed over a shorter time interval such as, since the last overhaul or scheduled maintenance interval. Upon entering the Running Totals option, the user will encounter a screen resembling that below. >Show running totals on display < - Running Totals Transfer dataMenu to RS-232 port >Show running totals on display < Stop/start trip monitor Transfer data to RS-232 port Stop/start trip monitor II SELECT I EXIT II SELECT I EX

Information can only be accumulated in the memory when the engine is running, therefore a unit being towed dead-in-consist will not tally the towed miles. If a serious fault occurs in the data acquisition of running totals, all data will be reset to zero. If this occurs, the service date of the unit should be changed to the date that the reset event occurred. Requesting the “...totals to display” option from the menu will present the following two page screen.

9B-58


0

Choosing the lifetime or trip monitor totals options will display running total data in a format similar to the following.

Choosing any throttle data package presents the data in the following format.


Selection of monthly data packages will show information as below.

ENGLISH/METRIC This function gives the user the ability to display units through the computer read out in either the English or metric numbering system. The computer will remember the last request for units. Therefore, cycling power to the computer in an attempt to “reset” the display to the familiar English units won’t work.

9B-60


0

SECTION 9C. AC MOTOR - THEORY OF OPERATION AC MOTOR POWER OPERATION - NO LOAD A conventional DC motor with a separately connected field and armature winding allows armature current, and consequently motor torque, to be varied independently of flux (field current). Increasing the load will cause an increase in armature current but the field current will not be changed. NOTE DC motors for locomotive traction usually have armature and field windings connected in series which precludes separate field and armature control.

NOTE: AC induction motors have no electrical connections to the rotor and no electrical connection between the rotor and stator - the stator and rotor circuits are magnetically coupled. There is no external electrical connection to the rotor therefore all voltage present on the rotor winding has to be "induced" across the air gap by magnetic fields created by stator current. Because there are three separate stator windings, one for each phase, the effects of each separate winding has to be considered in regard to any inductive effect on the rotor.

EC31357

Figure 9C-1 Simplified Diagram Of 3 Phase Induction Motor A three phase induction motor, Figure 9C-1, is constructed of a stator with one electrical winding for each phase placed symmetrically (120°) around its circumference and a rotor with a winding formed into a cylindrical cage (“squirrel cage”). An air gap separates the stator and rotor. The lack of brushes or commutator provides a simple, rugged and maintenance free design. AC MOTOR - THEORY OF OPERATION 9C-1

ENERGY FLOW IN POWER An overall view of the locomotive power system can be obtained with an energy flow diagram. Figure 9C-2 illustrates general energy flow in power operation. Chemical potential energy of the diesel fuel is converted to mechanical energy by the diesel engine to power the main generator. Energy flows from the diesel engine to the main generator to the DC link to the inverters. Traction inverters control energy flow to the traction motors that convert the electrical energy into mechanical energy to do the work of moving the train.

NOTE In dynamic brake the energy flow is essentially reversed in so far as the motors are used as generators drawing rotational energy converted from the kinetic energy of the unpowered moving train. This energy is dissipated on resistive grids. The attendant loss of energy through heat causes the train to slow down.

use F43331

Figure 9C-2 Energy Flow In Power

9C-2


0

INPUT PHASE VOLTAGES When power is applied to the motor, the supply voltage is provided to all three windings at the same instant. The position of the zero starting point of each AC voltage waveform determines when the maximum value (voltage) will occur in relation the other phases. The difference in the zero starting point between phases is called the phase angle and is designated phi φ. The applied voltage V is a three phase source - any given phase occurs 120 electrical degrees (phase angle = 120°) from the phase before and after it. These phases are designated A, B, C, and are shown in Figure 9C-3. A voltage V is applied to each winding and causes a magnetic field to occur around the winding. The AC supply causes a continuous change in polarity of the input voltage and consequently the magnetic field also switches from north to south. The magnetic field radiates outward from the core of the winding and is constantly switching poles at each end of the core from north to south as the supply voltage changes from positive to negative (alternations). The magnetic fields build to maximum value as the supply currents (voltages) go to maximum. NOTE Alternating frequencies are usually expressed in cycles per second such as 60 cycles/second. A conversion to circular units can be made by using radian measure. A radian is the distance around the circumference of a circle that is equal to the radius of that circle. There are two π radians (2π = 6.28 radians) in a circle. Waveforms that are periodic every 360 degrees can be converted to radian units because 2π radians is the same as one complete revolution of a radius vector around a circle. A representation of the input phase voltages applied to the stator windings of a three phase induction motor is shown in Figure 9C-3. Each input voltage cycle is 360° in length - waveforms are periodic in 2π (360°) with each phase occurring 120 degrees apart from the next.

EC31726

Figure 9C-3 Induction Motor Input Phase Diagram

AC MOTOR - THEORY OF OPERATION 9C-3

EC32524

Figure 9C-4 Phase A Winding Of A Three Phase AC Motor

Phase A voltage rises to +V at 90° and decays to 0 VAC at 180° before going negative. When phase A is at 120° phase B is at 0 VAC. The phase B voltage value is 0 VAC (rising) 120° after phase A voltage is 0 VAC. Phase C voltage similarly lags phase B voltage by 120°.

NOTE The continuous nature of an AC voltage supply requires that we assume an instantaneous starting point as a reference: phase A starting from 0 VAC in winding A at t0 (or 0 °). For simplification, phase voltages V A, VB, and VC are applied to stator windings A, B, and C respectively at the instant that the circuit is powered.

9C-4


0

FLUX WAVE The phasing of the three phase input voltages and the location of the stator windings causes alternating magnetic fields to rotate around the stator windings, in effect, creating a “flux wave”. Refer to Figure 9C-5.

EC31359

Figure 9C-5 Stator Flux Wave

The flux wave, which originates in the air gap between rotor and stator, interacts with the rotor winding and induces a voltage in the rotor circuit. This induced voltage causes a rotor current which sets up a magnetic field that opposes the flux wave created in the stator circuit. Because these magnetic fields are in opposition the rotor is forced to move away from the stator flux wave thereby forcing the rotor to move in the direction of the flux wave. NOTE The complex interaction between 4 poles/phase, 3 phase, varying magnetic fields on the rotor makes an exact representation on a physical level impossible. These illustrations are simplified expressions of the net effect of the magnetic fields on the motor.


MOTOR START When starting an induction motor, the stator winding is connected to the line and a current flows through the winding and produces a rotating magnetic field that, as long as the rotor is at a standstill, revolves by the conductors at a speed equal to the synchronous speed of the machine. This sets up a heavy current in the rotor’s conductors of a frequency equal to the line frequency. As the rotor comes up to speed, the current and frequency decrease in the rotors conductors until a speed is reached where the current in the rotor is just sufficient to produce the necessary torque to carry the load. This speed must be less than synchronous speed, for if the rotor is made to revolve at the same speed as the magnetic field, it has no voltage generated in its conductors to set up a current to produce torque.

MOTOR REVERSAL Changing the direction of rotation (armature) of a DC traction motor, is accomplished by reversing the direction of current flow through the field. The direction of rotation of an AC induction motor can be changed by interchanging any two phases of the input voltage.

POWER OPERATION - APPLY LOAD SLIP FREQUENCY When a load is applied to the rotor it causes the rotor to slow down below the speed of the flux wave. The difference between the synchronous speed and the rotor speed is called the SLIP of the motor. The slip can be measured as a percentage of the synchronous speed or expressed as the slip frequency - the difference between synchronous speed and rotor speed. Refer to Figure 9C-6. When the rotor reaches the slip speed then the rotating flux wave is turning at the exact same speed as the rotor and therefore no lines of flux are being cut by the single rotor conductor we used in the example - the relative speed of the rotor to the flux wave is constant. Therefore no voltage is induced in the rotor, no current is produced in the conductor, and consequently no force is exerted on the rotor. No force exerted on the rotor means no motor torque is available and the rotor will continue to rotate at the same speed. The frequency of the applied voltage and the number of poles in the rotor determine the speed of the rotating magnetic field as it passes through the rotor conductors. If the rotor is stationary, then the flux wave will generate maximum current at the line frequency in the rotor conductors. Rotor movement will occur until the rotor reaches operating speed. If the rotor was unloaded and could speed up to approach the speed of the stator flux wave, then the lines of force in the rotating stator flux wave will not cut the conductors in the rotor circuit. If the rotor conductors are not under the influence of the flux wave, then no rotor voltage will be induced and, consequently no rotor current or motor torque will be developed. No rotor torque means that the machine will begin to slow down.

9C-6


0 If the rotor under load slows down it will reach a speed where the flux wave is again cutting the rotor conductors and torque is produced. This speed must be less than the synchronous speed to maintain constant motor operation - under load the rotor always rotates slower than the flux wave in the stator windings. This difference in rotating speed is called the SLIP. In real applications, this SLIP or difference in speed amounts to from 1 to 20 per cent, depending on motor design. The difference in speed between the magnetic field of the stator and the mechanical speed of the rotor is usually expressed as a percentage.

Mag Fld Spd - Rtr Spd x 100% SLIP = ------------------------------Mag Fld Spd

NOTE Depending on load conditions, the GT46MAC locomotive will operate with a much smaller motor slip at speeds above about 10 MPH.

EC31950

Figure 9C-6 Slip Frequency INCREASE LOAD : If the load is increased on the motor, the rotor decreases in

speed so that a voltage and current will be generated in the rotors conductors to produce the necessary torque to carry the load. If the increase in load is too great, the motor will be stalled. The torque developed when the motor is stalled is known as the pull-out or breakdown torque. Generally an induction motor can develop a torque that is about 1.5 to 2.5 times its rated value before stalling. AC MOTOR - THEORY OF OPERATION 9C-7

The current in the stators windings of an induction motor is limited by both the DC resistance of the winding and the counter-e.m.f. generated in the winding similar to the primary of a transformer. Under normal operating conditions, the current in the rotor conductors is in a direction to have a demagnetizing effect on the stator, so that as the load increases on the rotor, the increased current in the rotor reduces the flux due to the stator current. This in turn reduces the countere.m.f. in the stator, and a greater current is taken from the line to balance the effects of the rotors current.

OPERATING CURVE An operating curve for a simple 3 phase induction motor is shown in Figure 9C7. This curve indicates how the torque of the motor changes with an increase in motor speed.

EC31756

Figure 9C-7 AC Motor Operating Curve

Increasing the supply frequency of the voltage applied to an AC motor causes the motor speed to increase as long as rotor current continues to increase. Motor torque will increase with increasing motor speed until inductive reactance reaches a point where it starts to limit rotor current. A further increase in motor speed (frequency) and consequently inductive reactance, causes rotor current to drop off. As rotor current decreases it causes a drop in motor torque.

9C-8


0

BREAKDOWN OR PULLOUT TORQUE Breakdown or pullout torque is the maximum load torque a motor will produce while running without an abrupt drop in speed and power. Refer to Figure 9C-8. The practical operating range of the motor lies between its maximum torque (min. speed) and minimum torque (max. speed).

EC31768

Figure 9C-8 Traction Motor Operating Characteristics


INCREASE MOTOR VOLTAGE The torque of a 3 phase induction motor could be increased by raising the supply voltage. This would increase the density of the rotating flux wave which would increase the amount of induced voltage in the rotor circuit thereby raising the induced rotor current. Increased rotor current increases the force on the rotor which is the motor torque. The drawback of this method is that in a short time the limiting value of rotor current is reached and the voltage cannot be increased any further. Refer to Figure 9C-9.

EC31769

Figure 9C-9 Increase Motor Voltage

9C-10


0

INCREASE MOTOR SPEED •

If motor input supply voltage is raised, then rotor current will go too high.

•

If frequency is raised, then rotor current goes down due to raising the impedance of the stator windings: XL = 2 π f L. The higher stator impedance causes reduced stator current with the resulting loss in flux density through the rotor.

•

The speed of the traction motor could be increased by raising the frequency of the supply voltage. But raising only the frequency of the supply will cause a reduction in rotor current because the impedance (inductive reactance) of the rotor increases with frequency. This reduction in rotor current is compensated for by increasing rotor current through an increase in supply voltage.

•

The effects of raising the supply voltage/frequency is that the flux wave is rotating at a much higher speed than the rotor and the flux in the rotor will cause the rotor to speed up creating a new synchronous speed. Refer to Figure 9C-10.

ec31757

Figure 9C-10 New Synchronous Speed


INCREASE POWER The overall aim of the control system is to cause the traction motors to operate at a constant output torque level over the required locomotive speed range. Unfortunately, the nature of high power electric motors prevents constant torque at higher speeds. It is possible to maintain fairly constant output torque until maximum applied voltage is reached. After maximum applied voltage is reached, operation at constant horsepower to the maximum motor speed is the best that can be obtained.

INCREASE APPLIED VOLTAGE/FREQUENCY It can be seen that by increasing both the applied voltage and the frequency in the same proportion the motor operating curve will move to the right and the torque peak will be available at a higher motor speed. Refer to Figure 9-11 on this page. The voltage and frequency must be raised proportionally as an increase in motor speed is desired.

EC31772

Figure 9-11 Increase Frequency And Voltage Proportionally

9C-12


0

OPERATION BELOW MAXIMUM APPLIED MOTOR VOLTAGE Motor speed can be increased by raising the proportional value of the applied voltage and frequency until the maximum applied voltage is reached. Refer to Figure 9-12. At the maximum applied voltage value of 2000 VAC, no further increase in voltage is allowed and constant motor torque operation is no longer possible.

EC31773

Figure 9-12 Increase Motor Voltage/Frequency To Voltage Limit


OPERATION ABOVE MAXIMUM APPLIED MOTOR VOLTAGE Once motor voltage is at maximum, operation at constant horsepower is required to keep the locomotive at its highest operating level. Refer to Figure 913.

EC31775

Figure 9-13 Increase Motor Voltage/Frequency Above Voltage Limit As motor frequency is increased with the same applied voltage (2000 VAC) the inductive reactance of the rotor circuit also increases. The increase in rotor impedance causes rotor current to be reduced and consequently, motor torque also to be reduced - the operating curve moves to the right, with a decreasing motor torque value, to the motor (and locomotive) maximum speed.

9C-14


0

DYNAMIC BRAKE In order to slow down or brake a moving object some means of decreasing its kinetic energy (KE = 1/2mv2) must be provided. Dynamic braking is an electrical method used to brake a locomotive (train) by translating the kinetic energy of the moving train into rotating energy in the traction motors. This mechanical rotating energy is converted to electrical power by using the traction motors as electrical generators. The power generated by these motors can be applied to the resistor grids which dissipate the power as heat to the atmosphere thereby reducing the kinetic energy of the train.

ENERGY FLOW IN DYNAMIC BRAKE Figure 9C-14 illustrates energy flow in dynamic brake operation. The kinetic energy of the moving train is transformed into electrical energy by the rotating traction motors acting as generators. This generated electrical energy is applied to the DC link which supplies the braking grids. The control computer directs energy flow to the brake grids where this excess energy is dissipated as heat.

F43332

Figure 9C-14 Energy Flow In Dynamic Brake


EC31951

Figure 9C-15 Power/Brake Motor Operating Curve NOTE The traction control converters (TCC) have the ability to transfer power generated by the traction motors back into the DC link. This dual capability to convert DC into AC (inverter) and AC into DC (converter) is what makes dynamic brake possible. The AC traction energy is converted to DC, applied to the DC link, then applied to the brake grids.

DYNAMIC BRAKING EFFORT CONTROL It may be desirable from a train control standpoint to provide a specific constant amount of retarding (braking) force for each brake handle position regardless of the speed of the train. This control system attempts to provide that characteristic but is limited at higher track speeds. Traction motors convert mechanical energy into electrical energy. Each traction motor can be considered as an electrical power generator that is loading into the brake grids. In this way, traction motor output can be thought of as providing braking horsepower for the train to the grids. .

Retarding Force (lbs) x Speed (MPH) BRAKING HORSEPOWER = ----------------------------------------------375 where 1/375 converts lbs-mile/hour into horsepower

9C-16


0 The dynamic brake system on this locomotive model was designed to provide a constant amount of braking effort for each brake handle position. For a given brake handle position, braking effort will remain constant until the grid power limit is reached. Refer to Figure 9C-16.

B

EC38026

A

Figure 9C-16 Dynamic Braking Effort/Speed Curves OPERATION The total dynamic braking energy must be dissipated on the brake grids. Grid resistance is lowest when grids are cold and highest when grids are hot. Assume that the grids are 1.25 ohms (HOT-) to find the highest value of grid voltage as follows.

NOTE When dynamic brake is initiated, the brake grids will change from COLD to HOT values within 30 seconds of operation. The exact HOT resistance value depends on ambient air temperature and density.


Maximum power that the grids are able to dissipate is a total of 2940 KW- 2 parallel paths of four grids each (1.25 ohm/grid) for a total resistance of 2.5 ohms. Therefore the DC link voltage must be limited to: P = V x I P = V x V/R P = V2/R V2 = 2940000/2.5 V = 1084.4 VDC

The maximum power rating of the dynamic brake grids is 367.5 KW per grid. The grids should operate at the highest allowed value to provide the most braking effort but DC link voltage is limited at 1055 VDC. The motor must be operated at a reduced maximum voltage in dynamic brake because energy flow in power is from the inverter to the traction motor which requires that the voltage at the motor terminals be higher than the internal motor voltage. Energy flow in dynamic brake is from the traction motor to the inverter which requires that the motor terminal voltage be less than the internal motor voltage. In other words, energy flows downhill - from a higher potential to a lower potential. NOTE Calculations are based on the HOT grid resistance value of 1.25 ohms which will produce the highest power rating for a given applied DC link voltage. With dynamic braking, the electrical braking on the train is limited to the amount of electrical power that can be dissipated by the grid resistors. The GT46MAC locomotive has eight 1.25 ohm (HOT) braking grid resistors each capable of dissipating a maximum of 367.5 KW. Maximum dynamic braking will occur when the most power is being dissipated. The control computer regulates DC link voltage for dynamic braking as the locomotive slows down from higher speed. Along curve C-D on Figure 9C-16, the grids are at the maximum value of dissipated grid power which is about 2940 KW. At speeds above point C (24 MPH), grid resistance is equal to the eight brake grids connected in series-parallel which is 2.5 ohms. The maximum DC link voltage in dynamic brake is limited by the computer so as not to exceed the maximum power rating of the grids.

NOTE Braking power is more than just grid power because there is inverter and cabling losses.

9C-18


0

GRID POWER VS LOCOMOTIVE SPEED At D: Braking effort is at maximum because the traction motors are providing maximum power to the brake grids- the grids are at maximum dissipation. C to D: Constant braking horsepower - braking effort increases as train slows down because each pound of braking force is more effective as speed decreases. B to A: Below 4 MPH the traction motors do not have sufficient rotational energy to provide appreciable braking effort. At higher locomotive speed, the effective value of the power dissipated on the grids becomes less because the overall kinetic energy of the train has increased. In other words, each kilowatt of power that leaves the grids provides less braking on the train as speed increases because the dissipated power is limited by the design of the grid resistors while the energy of the train can continue increasing with speed. In the same way, as the locomotive slows down from a high speed each kilowatt of energy dissipated becomes more effective on braking the train. This process will continue until the train slows to approximately 24 MPH. At 24 MPH braking effort is at a maximum value of about 81,000 pounds of braking force or braking effort. Below this point braking effort is constant to 4 MPH. The 24 MPH break point is not related to the mechanical energy loss capability of the moving train but rather to the decrease in the motor’s efficiency as generators as they slow down. Refer to Figure 9C-16.


PULSE WIDTH MODULATION TECHNIQUES The ideal power source for an AC motor is a sine wave voltage input. A locomotive AC traction motor has unique requirements from a generation and control standpoint: •

high horsepower output (670 HP max)

•

high power input (500 KW max)

•

high voltage input (2000 VAC max)

•

variable voltage input (0 to 2000 VAC)

•

variable frequency input (0 to 110 Hz)

•

variable operating speed (0 to 3220 RPM)

These special considerations make it too complex and expensive to control the amplitude and frequency of an AC sine wave from a mechanically driven generator or transformer. The GT46MAC locomotive has DC to AC inverters that use solid state electronic devices to synthesize a variable voltage, variable frequency, high power AC sine wave. This method uses the 5 VDC microprocessors of the inverter computers to generate and control a 2000 VAC, 3 phase AC sine wave approximation. The DC link voltage is the input voltage supply for both inverters - traction inverters TCC1 and TCC2. The inverters convert the DC link voltage into variable frequency, variable voltage, 3 phase power for the traction motors. This process is performed in the inverters with some form of pulse width modulation (PWM) that makes use of gate turn-off thyristors (GTO) to control the pulse widths. The GTOs are triggered by the inverter (secondary) computers. Conventional SCRs can be turned on with an electronic gate but can only be turned OFF by removing the supply voltage which eliminates excitation to the circuit. A Gate Turn-Off (GTO) thyristor has an electronic gate that can turn it on and turn it off. This feature allows much more precise control of an output signal without disconnecting the supply voltage from the circuit. The inverters are constructed in a modular design that allows easy service and provides interchangeability. The GTOs and diodes that make up each phase in an inverter cabinet are also packaged in a modular design that is designated a phase module.

9C-20


0

EC32746

Figure 9C-17 Traction Motor Characteristic/Inverter Pulsing

NOTE The GT46MAC locomotive reaches full horsepower at 9.3 MPH. Motor voltage will continue to increase from the start of the constant power region at 9.3 MPH until maximum applied voltage is reached.

This system uses AS (asynchronous) and SS (sinusoidal) modes while operating at constant torque then switches to R (rectangular) and BLOCK (fundamental or input frequency) when the limit of constant torque is reached and the system switches to constant power operation. At the switching point from constant torque to constant power the GTOs have reached maximum frequency so some other means is needed - operation goes into fundamental frequency PWM. All operation above maximum applied motor voltage is by BLOCK (fundamental frequency) PWM.


LOCOMOTIVE OPERATING CHARACTERISTICS The ideal locomotive would supply constant tractive effort over its entire speed range of operation. High tractive requirements make it impractical for the power equipment to fulfill this condition at higher locomotive speeds. At higher speeds the control system regulates at a constant kilowatt level (or horsepower) being delivered to the traction motors over the remaining speed range. The main limitation on constant tractive effort delivery is that the traction motors are unable to provide a constant motor torque over their operating speed range. Maximizing motor torque results in maximum tractive effort. To provide the most torque from the traction motors at all times, the control system attempts to keep the motors operating at the torque peak as long as possible - constant torque is provided; then, from the point of maximum applied voltage the control system will maintain constant horsepower. Constant horsepower operation produces a continual lowering of the torque peak which lowers tractive effort and produces the traction motor operating curve shown in Figure 9C-18.

EC38027

Figure 9C-18 Traction Motor Operating Values NOTE In actual locomotive operation, full horsepower (constant power) is available at 9.3 MPH and applied voltage continues to rise to maximum as speed increases. The torque of the traction motor is applied to the wheel through the wheel/axle gear ratio. This gear ratio changes the torque value that is applied to the wheel. Traction motors can operate at high speed but provide little torque. At the locomotive wheel, what is needed is lots of torque with little speed. The locomotive gear ratio converts the speed of the motor into torque at the wheel.

9C-22


0 Because the pinion gear and axle gear are meshed at the tooth contact area, the forces at this point must be equal and opposite when the locomotive is powered - the gear ratio changes the ratio of torques - a greater number of teeth on the axle gear causes this force to be distributed over a longer radius thereby increasing the torque on the wheel. In this way, motor torque is transmitted to the wheel. The wheel torque is then applied to the rail in the form of tractive effort which is the force of the wheel on the track. Refer to Figure 9C-19.

EC32667

Figure 9C-19 Tractive Effort At Wheel Overall control of the locomotive is maintained by the primary (EM2000) computer that is located in the #1 electrical cabinet. This computer is instructed through “programs” to provide the maximum value of motor torque for each throttle position and operating condition. The amount of torque produced by each traction motor is transferred to the wheel and proportioned by the overall locomotive gear ratio to produce tractive effort at the wheel. Tractive effort provided by each wheelset combine to produce the overall locomotive performance characteristics shown. The maximum value of traction motor torque for continuous operation is 13190.5 NM foot-pounds per motor. This amount of torque is translated by the locomotive gear ratio (90:17) and applied to the locomotive wheel. The amount of tractive effort that can be developed is independent of locomotive weight. The tractive effort that can be utilized on a particular locomotive is dependent on locomotive weight. The primary consideration in determining tractive effort is the ratio of tractive effort to weight on the driven axle. Refer to Figure 9C-19. If tractive effort (in pounds) exceeds 25% of the weight (in pounds) on a particular locomotive axle, then the chance of a slipping wheel is high. Of course, the actual tractive effort is determined by the rail conditions at that instant. AC MOTOR - THEORY OF OPERATION 9C-23

AC MOTOR POWER/DYNAMIC BRAKE THEORY •

NOTE AC MOTOR WITH NO LOAD - Inverter frequency = Motor electrical frequency

•

AC MOTOR IN POWER - Inverter frequency above motor electrical frequency

•

AC MOTOR IN BRAKE - Inverter frequency below motor electrical frequency In dynamic brake, traction motor torque must be developed in the opposite direction to power operation. This requires that the motor be re-oriented to act as a generating device instead of a power device. During power operation, the inductance of the motor causes motor voltage to lead motor current - a leading edge voltage (lagging power factor) waveform. In dynamic brake, power must flow out from the inverter to the DC link. The DC link is not allowed to drop below 600 VDC in dynamic brake. This lowered potential is seen by the traction motor as a current sink and the capacitance of the inverter input filter changes the power waveform into leading edge current (leading power factor) which re-orients the motor into a generating device. The inverter input filter capacitor facilitates power flow INTO the DC link because of its lower potential and creates a leading edge current to force the motors to act as generators. The power generated by the motor is supplied to the DC link where it is dissipated on the brake grids. Dynamic brake operation is possible with AC motors because the output frequency of the inverter is made lower than the motor operating frequency which produces negative SLIP. Negative slip causes negative torque in the motor which causes it to slow down.

NOTE In dynamic brake, the GTOs are out of the circuit and all of the motor generated current goes through the GTO circuit diodes.

9C-24


0

SECTION 9D. INVERTER OPERATIONS NOTE! Schematics are provided ONLY as an example. Be sure to refer to the proper schematics when working on a GT46MAC locomotive.

This section deals with many of the concepts concerning the operation and protection of the inverters used for AC traction systems on the GT46MAC. Descriptions of individual components used to execute the functions described here come in the following sections.

GTO SWITCHING An inverter with voltage source DC Link suits the requirements for a three phase generation system quite well. The use of GTO thyristors in such an application allows for a wide range of output voltage frequencies. This design exhibits a high efficiency by virtue of the use of GTOs. Figure 9D-1 shows the fundamental configuration of a VSI three phase system. The system consists of a voltage source supply (DC Link), a large capacitance connected in parallel with the source (marked Cd) to stabilize the voltage source, and three phase modules to perform the switching of DC Link for inversion to AC. Each phase module can be distinguished by the dotted lines drawn in rectangular fashion. The GTOs of three phase modules combine to create a three phase AC input to the wye connected fields of the traction motors. By varying the switching patterns of the GTOs, the inverter controls the amplitude (voltage) and the frequency (rotating speed) of the AC wave form. For the sake of simplicity, we will consider only one of the three wave forms produced by the inverter.

F43333

Figure 9D-1 Simplified Inverter Schematic A thyristor is a special kind of diode. As we all know, a diode will conduct electricity only when forward biased by the voltage placed across it. A thyristor is nothing more than a diode that can be given a “signal” telling it when to conduct. INVERTER OPERATIONS 9D-1

When the signal is given, the thyristor will conduct, provided of course that it is “forward biased.” Many of us are already familiar with this type of thyristor, the Silicon Controlled Rectifiers or SCRs used in the excitation circuit of the locomotive’s Main Generator (Traction Alternator). In this case, the SCR receives a “turn-on” signal and remains conductive until it becomes reverse biased. In other words, there is no way to “tell” the SCR to stop conducting. However, a GTO is a type of thyristor which can be “told” to turn off, hence the name Gate Turn-Off thyristor. So, a GTO can really be thought of as a switch. What makes a GTO “turn-on?” A thyristor, as mentioned in the previous paragraph, is selectively conductive. The element will begin conducting when it receives an “injection of electrons” on its gate lead from some external source. With an SCR, the element continues to conduct until such time that the forward voltage across it has gone to zero or below. A GTO, however, can stop conducting if that “injection of electrons” is drawn back. If for some reason the "injection" cannot be withdrawn, the GTO cannot shut off. Such a condition would be recognized by the inverter computer, and operation would cease. In this particular case, the fault logged would likely read "GTO STORAGE TIME EXCEEDED." In other words, the injection of electrons has been stored in the GTO for too long, and since it has not been withdrawn by this point in time, the inverter shuts down. Why shut down the inverter in such a case? The GTO's in a phase module alternate on and off. Both GTOs in a module can never be on at the same time otherwise the DC Link will see a direct short circuit. So since one of the GTOs cannot be turned off, we must stop operation before the other GTO of the same phase module turns on in order to prevent an overcurrent condition. Figure 9D-2 shows the fundamental system design with the GTO's drawn as switches.

F43334

Figure 9D-2 GTOs shown as switches With these “switches” in place, it becomes easy to connect and disconnect each output leg with either positive or negative DC Link. Now, by specifying GTO switching durations and their sequence in time, output voltages can be created which closely follow a sine curve. Again, both the wave frequency and amplitude can be adjusted by changing GTO switching patterns. Let’s take a look now at an example of how a variable AC waveform can be passed on to the motors.

9D-2

GT46MAC LOCMOTIVE SERVICE MANUAL

0 Let’s start with a simple condition that must be met. In order to have a defined voltage across a phase winding in the motor, two GTOs must be switched on to complete a circuit through the motor. In other words, we cannot just connect one side to positive DC Link and let the other side float. From analyzing the inverter block sketch, we see that the two GTOs of the same module cannot be switched on simultaneously for two reasons. First, from circuit analysis we can see that this will not give us a complete circuit through any phase. Secondly then, two GTOs from different phase modules must be used to create a phase. The creation of so called “phase-to-phase” voltages (voltage between two output terminals) are considered here. The possible phase-to-phase voltages are:

Uv1 = Urs = Ur - Us

Uv2 = Ust = Us - Ut

Uv3 = Utr = Ut - Ur To create Uv1, GTOs 1, 2, 3, & 6 must all work together. An example of this can be seen in Figure 9D-3. Notice in this demonstration that DC Link negative is actually called zero. This is for simplified mathematics in demonstration. The diagram shows a randomly selected switching sequence from the many that are possible. Let’s examine the sequence over the time span indicated, and learn how the GTOs all collaborate to create the fundamental phase-to-phase wave. Assume that Ud = 100, and that a new switching state occurs every second.

INVERTER OPERATIONS 9D-3

F43335

Figure 9D-3 Output Wave Formation by GTO switching At t=1, 3+6 are switched. Since phase R connects directly to the zero side of the input, the level of Ur equals zero on the graph of Figure 9D-4; likewise, Us equals +100 because phase S connects directly to the positive side of the input in this switching state. If we recall the formula from before that stated Uv1 = Ur Us, we can substitute these values and find what the voltage should be.

Uv1 = Urs = Ur - Us

Uv1 = Urs = 0 - 100 = -100 According to our computations, the resultant voltage should equal -100 at this point. The graph in Figure 9D-3 shows this to be true for the time t=1. Let’s take a look at the next step. At t=2, 6+2 are switched. Both phase R and phase S are connected to the zero side of the input. Remembering the formula again, it is easy to see that the resultant voltage between phases R and S should be zero. 9D-4


0 Common sense also tells us this since voltage is nothing more than a measurement of the difference in electrical potential between two points. The section of the graph at t=2 shows the resultant voltage at zero as expected. Notice also that the sine wave is beginning to take shape as voltage rises. At t=3 and t=4, 1+2 are switched. This condition connects phase R directly to the positive input and phase S to the negative. Again, using the formula or just plain common sense, it can be seen that the voltage between phases R and S will be +100. The graph illustrates this. Notice that the polarity of the phases has now reversed as must be the case to have an alternating or AC current flow. As the resultant voltage reaches its peak here, the sine wave is now more recognizable. When t=5, 1+3 are switched. This creates zero voltage between phases R and S since both phases are connected to the positive side of the input. As usual, the graph does verify the existence of zero as the resultant potential. The resultant sine wave has begun its decent toward zero on its negative going cycle. Finally at t=6, the switches return to their initial state of 3+6 turned on. Just as with the sample examined from t=1, the voltage resultant here equals -100. We have now completed one full cycle of a particular GTO switching sequence. This particular sequence is known as full block. Not by coincidence, it happens to be the simplest of all switching patterns. It is typically used at very high motor RPM. Now let’s take a look at how all of the switching comes together to create a 3 phase simulated AC output. Figure 9D-4 shows when each phase module is connected to the positive or zero side of the input. Furthermore, this figure shows which GTOs are switched simultaneously and how the modules work together to create a 3 phase output. Notice that a module by itself cannot create a phase; it must work with the other modules. Now take a look at the same figure when a GTO has failed open. For the case demonstrated in Figure 9D-5, GTO #3 has failed. Notice the disruption in the phase symmetry.


F43336

Figure 9D-4 Creation of a Three-Phase Output

F43337

Figure 9D-5 Inverter Output with GTO #3 Failed Open 9D-6


0

PHASE VOLTAGES INSIDE THE MOTOR Up until this point, we have seen how the inverter creates its 3 phase output to the load (motor). However, we have not seen what the voltage steps or “chops” look like inside the motor. Figure 9D-6 shows a graph measuring voltage on each of the 3 Phases inside the motor. Previous examples have shown phase to phase measurements. This illustration though, shows a measurement from the input lead to the center point of the Y-connected motor field. These are the voltages that are directly responsible for the formation of the rotating magnetic field.

F43338

Figure 9D-6 Motor Field Voltages as a Result of GTO Switching. Each time a new GTO switching state occurs, the motor field phase leads are connected across the DC Link in a different configuration. As a result of the variable connections, the varying voltage levels develop. To help understand how each GTO switching state creates the voltage shown on the graph, Figure 9D-8 diagrams the actual field winding connections during those particular switching states. The switching states of the graph have been numbered to match with the corresponding motor field configurations. Assume the DC Link input voltage to be 300 VDC and the impedance of each field winding to be 10W. In state #1, GTOs 3, 5, & 6 are switched on. Examining the simplified schematic shown in Figure 9D-7 it can be seen that this causes phases S & T to be connected to DC Link positive, while phase R connects with DC Link negative. Using simple circuit analysis and Ohm’s Law, it can be deduced that phases S & T measure +100 Volts with respect to the Y-center point, while phase R measures -200 Volts. The graph of Figure 9D-6 follows this assessment.


.

F43339

Figure 9D-7 Simplified Inverter Schematic

Figure 9D-8 Motor Field Configurations Still assume that DC Link input voltage is 300 VDC. In state #2, GTOs 2, 5, & 6 are switched on. The simplified schematic shows that this situation causes phase T to connect with DC Link positive, while phases S & R connect with DC Link negative. Again using simple circuit analysis and Ohm’s Law, we see that phase T has a potential of +200 Volts with respect to the center point, while phases R & S measure -100 Volts.

9D-8


0 Continuing on this repetitious path, we can prove all of the claims made by the graph for each of the 6 motor field configurations using the same principles as above.

PULSE WIDTH MODULATION The maximum possible phase-to-phase voltage output from the inverter depends on the DC-Link voltage input. The maximum possible output can be calculated from the formula. MAX Uv

= .78Ud

In other words, phase to phase output can equal only as much as 78% of the input voltage. Such a case can exist when the full block switching pattern as demonstrated previously is used. For lower output voltage settings, the GTOs are switched so that partial areas of the widths defined in the previous example can be removed. The sine wave output is a result of the average value of DC Link switched on over a time period. In the first demonstration, a “full block” of DC Link was passed through to the output of the inverter without interruption, hence the name “full block.” Keeping the Link switched on without interruption means a high average value. If portions of the “full block” are cut out or chopped, though, the average value goes down as more is cut out. This concept is demonstrated in Figure 9D-9. In this example, the resultant wave is controlled by cutting out six areas.

F43340

Figure 9D-9 “Full block” (not chopped) modulation creates sine wave

F43341

Figure 9D-10 “Chopped” DC Link creates a sine wave. Operation at 7-pulse modulation The number of areas to be cut out of a wave will always be even, while the number of pulses left over will always be odd. In Figure 9D-10, 5 pulses are left over, so the inverter is said to be operating at 5-pulse modulation. The number of pulses in a pulse train can be any odd number from 1 to 21.


Notice that the duration of each pulse becomes longer as the center of the pulse train approaches, and then the pulse pattern on the trailing part of the train is merely a mirror image of those on the leading end. Also observe that a longer pulse duration creates a higher resultant wave. By varying the duration or width of each pulse, the resultant or fundamental wave voltage can be modulated. This method of control is referred to as pulse width modulation. Achieving different fundamental wave voltages by varying pulse width is illustrated in Figure 9D10. All of the 3 examples use 3-pulse modulation with various pulse widths to obtain the desired voltage output.The frequency of the output voltage wave is controlled by the length of the pulse train. A shorter pulse train means a higher frequency.

F43342

Figure 9D-11 Pulse duration varies voltage. Examples show operation at 3 pulse modulation

9D-10


0

MODULATION MODES Before diving into this subject, let’s clearly define two terms that are key to understanding the following discussion. Inverter output frequency is the frequency of the voltage wave being sent from the inverter to the traction motors. GTO switching frequency is how quickly the GTO thyristors on turning off and on in order to create the inverter output voltage wave. It is entirely possible to have switching frequency be equal to output frequency, while it is also possible to have switching frequency exceed output frequency by nearly 25 times. With this said, let’s take a look at how these two frequencies are related. During operation, demands on the inverter with regards to range of frequency output vary continually. The inverter best controls the motors when the pulse number is the highest allowable. The demands for frequency range can be met by changing the length of a pulse train. Herein lies a limitation. The maximum switching frequency remains possible to only a certain rotor RPM, after that the inverter cannot switch the GTOs fast enough (field frequency must exceed rotor frequency to maintain power operation).

At very low speeds, the inverter operates at the maximum GTO switching frequency. This is known as “free modulation.” The inverter adjusts output voltage and frequency through pulse width modulation as explained earlier. The inverter maintains outstanding control over the motors; since such a great number of switching pulses per train is possible, it can regulate output voltage very closely. As the rotor spins faster, though, the GTOs must also switch faster to provide the required output frequency.

Eventually as rotor speed continues to increase, the inverter cannot switch the GTOs any faster, so an even number of pulses must be eliminated from the pulse train. The inverter now operates in n-pulse modulation, where n = the number of pulses in a pulse train. As stated earlier, n can be any odd number from 1 to 21; 1 would be “full block,” and 21 would be very near to “free modulation.” Again, as the rotor of the motor spins faster, the switching must become more rapid until eventually the inverter cannot switch the GTOs any faster. Once again, the inverter eliminates a few pulses from the train. By removing pulses from the train, the inverter sacrifices a certain amount of control over the motors. However, as speed increases precise motor control becomes less critical. So since motor speed has increased in this case, nothing is really lost by eliminating just a few pulses from the train as speed increases.

As the motor approaches the upper speed range, the inverter can no longer switch fast enough to produce multiple pulses in a pulse train. At this point, the inverter will supply only one pulse per half wave of AC; in other words, the inverter will operate in a full block mode. Full block in the high speed range has the special name of fundamental frequency modulation. This just means that the GTO switching will be at the exact same frequency as the inverter voltage wave output frequency. Since this is a full block mode, pieces cannot be cut out to reduce the voltage of the resultant wave. Rather, the input source must change when running at high speeds in fundamental frequency modulation. Figure 9D12 shows each of the 3 inverter modulation modes over a speed range and how the number of pulses in a pulse train becomes less as output frequency rises. INVERTER OPERATIONS 9D-11

F43343

Figure 9D-12 Modulation Modes. Let’s interpret this graph by following the solid jagged line across. Examine point 1 where the inverter output frequency is very low. This means that motor speed will be very low, hence maximum GTO switching frequency is possible and looking at the graph we can see that in fact free modulation is active. Remember that maximum switching frequency is desirable since it affords the greatest amount of motor control. The line makes a sharp drop soon after. This drop is at point 2 on the graph. The inverter had been operating at maximum GTO switching frequency as demonstrated by the flat top portion following point 1. As motor speed increased, switching frequency came near to violating the minimum GTO "ON" time, so in order to maintain power operation (field frequency must exceed rotor frequency) a few pulses must be eliminated.

9D-12


0 Continuing from point 2 of the graph, the slope of the jagged line indicates that as field frequency increases GTO switching frequency must also increase in order to maintain a field that runs faster than rotor speed (field frequency must exceed rotor frequency for power operation). At point 3 on the graph we see that again the inverter has reached the maximum GTO switching frequency. So, in order to maintain a field that runs faster than the rotor, the inverter must reduce the number of pulses in a train just as before. This process is repeated over and over throughout the operating range of the inverter. As speed climbs into the upper reaches of the inverter’s operating range, the number of pulses in a pulse train goes to one (at about 40 MPH). This is the case at point 4 on the graph. Once the drop on the graph is made to 1 pulse per half wave or train, the inverter is now said to be in fundamental frequency modulation or full block mode.

DYNAMIC BRAKE/REGENERATIVE OPERATION BRAKE MODE CONCEPT The basic concept of dynamic braking has not changed a bit in the switch from DC to AC technology. The motors harness the mechanical energy created by the rolling train and convert it to electrical energy. This electrical energy is sent through low resistance, high power grids. The electrical load of these grids make the motor (which is now actually operating as a generator / alternator) very hard to turn. This reluctance to rotation acts to slow the train down. Exactly how the motors are controlled, and how energy passes from the motors up to the grids has changed somewhat. On a DC locomotive, the generator connects to the fields of the traction motor. The generator provides a variable power source used for excitation in the motor field windings. For more braking effort, the generator supplies more excitation. The energy created by the rotating machine far exceeds the energy supplied to it by the generator. Excitation of the AC machine is fairly similar. As we already know, the generator does not vary its output in order to control the power input to the traction motors; rather, the inverters control how much of the power available from the generator is passed on to the motors. The same variable excitation concept holds true, though. The more excitation supplied by the inverter, the greater the braking effort of the motor. Let’s take a closer look at how the entire AC system works together.


The Main Generator produces 600 VDC at all times. However, power from the generator is used in only two unique situations: 1. When first entering regenerative operation. 2. When braking effort is extremely low and speed is low. When neither of these cases is true, the excitation system is self-supplying. Each TC receives data from the EM2000 with instructions for how much braking effort to provide. Each TC Computer then decides on its own exactly how to provide the excitation in the motors required to achieve the braking effort requested by the EM2000. As in power, the inverters have the ability to correct for wheel slips independently of each other. Variable amounts of excitation are achieved via the same method as in power; the GTOs fire in sequence. Different firing patterns are used to attain various excitation levels. For brake mode, excitation is provided such that field frequency (or rotational speed) is less than rotor rotational speed. The motion of the rotor moving faster than this rotating field creates average power flow back into the inverter. The power that flows back into the inverter is rectified to DC by the free-wheeling diodes in each phase module before being passed on to the DC Link capacitors. The capacitors make operation of the entire system more energy efficient, however they add complexity in construction and function. They serve two purposes here: 1. Supply a constant energy source for motor field excitation. 2. Smooth out ripple in DC Link from both the generator and the rectified output from the inverters. As stated in point #1, the capacitors act as the constant energy source for the inverters in brake mode. This is why the AC system is much more energy efficient in brake mode than the DC system. We don’t need the generator at all times during dynamic braking. The motor excitation is self-supplying except at low braking effort/low motor speed. Figure 9D-13 and Figure 9D-14 provide an analogy for how this occurs. Inverters take their supply from DC Link. Initially, the capacitors are uncharged, in other words the pool is empty. So the generator, putting out 600 VDC, begins to pump “water” into the pool thereby charging the capacitors. As the motors begin to see excitation, they begin to produce output. This output is pumped into the DC Link. Because the motors are producing much more power than they are consuming from the pool, the pool quickly “fills up.” When the voltage on the DC Link exceeds that across the Main Generator, the rectifying banks connected to the generator become reverse biased. This shuts off the output of the generator, symbolized by the float valve. The grids act as a drain for the pool. Any energy not used for excitation is drained off through the grid resistors.

9D-14


0

F43345

Figure 9D-13 “Full pool” of DC Link” Assume now that the locomotive operates at low speed, and a low amount of braking effort is requested. A low braking effort means that very small amounts of energy will be drained from the pool for excitation purposes. Likewise, due to the low excitation level and low rotor speed, the power pumped back into the pool as regenerative power will be of a small amount. Notice however, that the “big drain” still exists since the grid resistors are still in place. Without the generator available, the grids would drain the pool very quickly. With the pool drained, there would be no energy left for excitation of the motors and brake operation would not be possible. This is demonstrated by Figure 9D-14.


.

F43346

Figure 9D-14 Main Gen. sustains DC Link "pool" level when "draining." AC POWER FLOW IN BRAKE MODE Regenerative operation of an AC induction machine is not easy to explain. To examine the entire braking process, consider first a DC machine in a generating mode. In this case, a stationary magnetic field is established in the stator of the motor. The momentum of the train causes the motors to turn. As the motor turns, the armature “cuts through” the stationary magnetic field in the stator. This “cutting” generates a current flow in the armature which is spent through resistor grids. On this DC machine, four power cables run to the motor. Two cables connect to the fields, and two to the armature. The cabling that runs to the grids makes connection with the armature by use of brushes and a commutator. For power operation, all leads connect to the generator, while only the field leads do so in brake mode; the armature leads connect to the resistive grids. This brings up an interesting question when considering an AC machine. Only 3 power cables connect with the motor. These cables supply the 3 phase AC source needed by the motors in both power and brake mode. For more braking effort, the inverter supplies more power to the fields. So, if power must always flow into the motor in order to excite the fields (regardless of the operating mode), how can power also flow out of the motor on the same 3 power leads? The key to the answer is remembering that we now deal with AC current and voltage waves rather than steady DC supplies.

9D-16


0

F43348

F43347

Figure 9D-15 DC in brake mode (left) Figure 9D-16 AC traction system in brake mode(right) The power that flows on these 3 leads is in alternating directions at all times. In power mode, power flows into the motor most of the time, but out of the motor for very brief intervals. In brake mode, power flows out of the motor most of the time, but into the motor for very brief intervals (this is necessary for excitation purposes). Power is defined by two components, voltage & current. The direction of power flow depends on the relationship between voltage and current with respect to time or "phase relationship." The "phase relationship" depends on speed of the rotating field with respect to the rotating speed of the rotor. If rotor speed lags field speed, voltage and current are nearly "in-phase" and power flows into the motor most of the time; if rotor speed exceeds field speed, voltage and current are "out of phase" by nearly 180° and power flows out of the motor most of the time. This is illustrated by Figure 9D-17 & Figure 9D-18 which show voltage and current relationships with respect to time ("phase relationships") for both power and brake mode. Power flow into the motor is denoted by light grey areas while flow out of the motor shows as dark grey.

F43350

Figure 9D-17 Power Flow in Power Mode.


F43351

Figure 9D-18 Power Flow in Brake Mode. Another way to understand mathematically how power flows in the AC motor is by mathematical calculation. To do this, we must consider the formula for calculating power in the machine as seen here

P=3VIcosø where 3 represents the 3 phases of the motor, P=power, V=AC voltage, I=AC current, and ø=phase angle between voltage & current. For our demonstration purposes, we can make things a bit simplified by dropping the 3 from the equation. V & I magnitudes as well as their angle of separation determine the magnitude of power flow. But, direction of power flow is defined by the cosø term, therefore we must understand the meaning of the cosø term in the equation.

THE MEANING OF COSØ The way to tackle the cosø term is to show how ø is measured, then examine how cosø affects the equation. ø is defined as the degree or angle of separation between voltage and current. Figure 9D-19 & Figure 9D-20 illustrate how the degree of separation is measured.

f43352

Figure 9D-19 Phase shift in power mode

9D-18


0

F43640

Figure 9D-20 Phase shift in brake mode Now that we have a better understanding of the cosø term, let’s consider it’s mathematical effect on the finished product of the equation for power. The cosø term always results in some value between +1 and -1. For our concerns, the magnitude requires little attention, but the sign of the value determines if power flow is positive (into the motor) or negative (out of the motor). The table here shows the value (positive or negative) of cosø for various ranges of ø. mode power brake brake power

ø 0°-90° 90°-180° 180°-270° 270°-360°

cosø positive negative negative positive

power flows into motor out of motor out of motor into motor

EFFECT OF IPS ON DYNAMIC BRAKE DC traction locomotives commonly implement a form of "extended range" dynamic braking which maintains near maximum brake effort from 24 MPH down to approximately 10 MPH. To accomplish this, DC units would short out segments of the brake grid thereby reducing the effective resistance of the load on the motors. The AC traction units have the ability to provide maximum braking effort down to almost 5 MPH without the use of such contactors. This is because the TCCs maintain very precise control over the frequency of power supplied to the motors. During this extended range operation, wheel slides are very possible, especially when air brakes are applied to the locomotive. Therefore, DC traction units deenergize the contactors that provide the extended range capability as a means of lowering brake effort and minimizing the likelihood of a wheel slide anytime that the Independent Pressure Switch (IPS) picks up. AC units don't have these contactors, therefore the method of brake effort reduction is a bit different. Anytime IPS picks up on AC traction units, brake effort automatically ramps down from the "flat-top" portion of the B.E. versus speed curve to a reduced level which would be equivalent to a DC locomotive operating at the samespeed without extended range capability.


F43641

Figure 9D-21 Reduced BE with IPS picked up.

TCC PROTECTION SCHEME In order to protect the TCC in the event of potentially damaging situations, a system called IPS (Inverter Protection System) has been installed for each inverter. The system consists of several monitoring devices and power dissipation components. Essentially, two crowbar type circuits make up the system. The two crowbar circuits are of different types, one a soft crowbar and the other a hard crowbar. Before getting too involved in the protection scheme, let’s first define what a crowbar is. When most people hear the word “crowbar,” they think of a large steel tool in the shape of a cane used for prying. How can this tool be associated with an electrical circuit? To explain an “electrical” crowbar, follow this example which employs the “steel” crowbar.

Figure 9D-22 Simple source/load circuit Consider the circuit shown in Figure 9D-22. A source provides an output via bus bars. Between the bus bars and the source is a circuit breaker. The bus has wires coming off of it that supply a load. The purpose of an electrical crowbar device is to protect both the load and supply from potentially damaging overvoltage and overcurrent conditions. To do this, obviously current and voltage must be monitored.

9D-20


0 If those monitored values exceed values set by software or hardware, then protection is activated which intentionally short circuits the source. How does this function make the device similar to the “steel” crowbar? Consider the circuit as shown in Figure 9D-23.

Figure 9D-23 Crowbar analogy When protection is activated, the “steel” crowbar is dropped across the bus bars creating a dead short circuit of the source. Obviously, this would trip the circuit breaker rather hastily. As mentioned before, two methods of protection (either a “hard” or a “soft” crowbar) can be initiated. The hard crowbar creates an authentic short circuit of the source with virtually zero resistance. The soft crowbar performs the same action, but with a resistance in series of approximately 3 Ohms. This resistance is the IPR (Inverter Protection Resistor) discussed in Section 9E of this manual. In both cases, the EM2000 is instantly notified of the crowbar firing, and Main Generator excitation is shut down. The signal that the crowbar fired can either come via serial link or be detected directly by EM2000 DC Link current feedback signals. The serial link signal, DC Link Current feedbacks, and EM2000 collectively make up the "circuit breaker" in this high power circuit. In any case, since generator excitation ceases, the output will rapidly decay through the crowbar and protect the traction system from further damage potential. Tripping of either crowbar comes at the command of Siemens equipment only! All locomotive components outside the TCC, including the EM2000, do not have the capability of triggering a crowbar. Conditions for which an SC (soft crowbar) may be fired are listed here. •Number of peak current Total Blocking incidents is too high for a given time span. •Motor current is too high more than twice in 1 second or three times in 10 seconds and Total Blocking attempts to control the condition are not effective. This may be an indication of a faulty transducer! •No load TCC output current exceeds ±100 A and Total Blocking attempts to rectify condition are ineffective. •DC Link Overvoltage. Total Blocking not effective. •User requests crowbar test through EM 2000.


•Serial link informs ASG that the other TCC has attempted to trip its soft crowbar.

The hard crowbar can be fired by either the ASG or by hardware built into the Inverter Protection System. All trips are initiated by the ASG unless otherwise noted. Events that can cause the triggering of the hard crowbar are listed here. •BOD initiated due to DC Link overvoltage. All ASG attempts to suppress the condition have failed. •TCB initiated due to GTO storage time exceeded. •Serial link informs ASG that other TCC attempted to fire its hard crowbar. •User requests crowbar test through EM2000. •ASG power supply breaks down. •Gate Unit power supply out of range. •DC Link overvoltage before BOD trip level. •Approximately 1.5 seconds after soft crowbar fires. Done to remove burden from the IPR (Inverter Protection Resistor). The table below describes the actions taken by the IPS in response to various DC Link overvoltage conditions. Level 3000 VDC 3200 VDC 3400 VDC 3600 VDC 1700-2100 AAC* 2300 AAC 2400 AAC

Action Block GTO firing until 2600 VDC ASG triggers soft crowbar ASG triggers hard crowbar BOD triggers hard crowbar Block faulty phase Block all phases ASG fires hard crowbar

*Depending on throttle position, speed, etc.

As shown by the progression of the table, the inverter reacts more aggressively as DC Link levels climb higher. If possible, the TCC brings the faulty condition back under control by simply interrupting GTO firing pulses (Total Blocking). Occasionally, this may not be enough and the ASG fires the soft crowbar. If the soft crowbar fails to control the situation fast enough (or simply fails to fire) DC Link may continue to rise. Also, DC Link may rise so fast that the soft crowbar may not catch the “run away” condition. For these reasons, the ASG would fire the hard crowbar. Finally, as a last resort the BOD element may signal for the trigger. The BOD (which is entirely independent of the ASG) is intended only as a backup device in the case that software cannot act for protection. For example, if the ASG fails and DC Link goes out of control, then the BOD comes to the rescue.

9D-22


0 As a rule, it is desirable for the soft crowbar to attempt to provide protection before firing HC. Some situations, however, call for the more drastic measures provided by the HC. For example, if a GU power supply (device PS-GTO) is out of range or “STORAGE TIME EXCEEDED” fault is signalled by the Thyristor Control Board (TCB), the HC fires immediately. Storage Time Exceeded indicates that a GTO could not be switched off. Likewise, improper GU power supply may prevent a GTO from being switched off. Such faults create an impending DC Link short circuit condition through the GTO thyristors. GTOs are not designed to handle such high current levels. They would easily be destroyed and possibly create further inverter damage. For this reason, drastic corrective action must be taken immediately, thus the firing of the hard crowbar before the soft. In response or reaction to any crowbar action, the locomotive drops its load, and both ASGs as well as the EM2000 record a fault to document the event. To recover from such an event, the EM2000 will automatically cycle the DC Link switchgear to the shorted position once DC Link has sufficiently decayed to ensure that the crowbar thyristors disengage. (Remember that crowbar thyristors are just like SCRs in the Main Generator excitation circuit; they will continue to conduct until forward voltage goes to zero.) Provided that another crowbar event has not occurred within the past 10 minutes, the switchgear will automatically motor back to the power position. Also, both inverters run automatic self tests to verify that operation is still possible. Once this is done, the EM2000 and Traction computers bring the locomotive back on line without the operator touching a single button. The time for this entire sequence may take as long as 20 seconds. The table of the previous page mentioned "blocking" as a protective action. A module in the ASG called "Control Systems Monitoring" monitors critical variables such as current, voltage, temperature, and CPU processing time. Should any of these variables exceed a pre-set limit, this module initiates an action called "Total Blocking" which interrupts GTO firing pulses momentarily until the faulty condition has been suppressed. Figure 9D-24 demonstrates Total Blocking in the case of an output current fault. If Total Blocking takes place too many times within a certain time span, TCC operation ceases and a fault is logged.

f43644

Figure 9D-24 Total Blocking.


SECONDARY WHEEL SLIP PROTECTION

F43645

Figure 9D-25 K-band radar location on the GT46MAC Microprocessor controlled locomotives built by Electro-Motive in the past have all used a “wheel creep control” system to enhance rail adhesion. Studies show that allowing the wheels of the locomotive to turn slightly faster than ground speed increases the adhesion ratio for that locomotive. In so doing, however, the locomotive can no longer rely upon the feedback signals generated by traction motor speed pick-ups, axle generators, or any other sort of wheel speed sensing device for an estimation of ground speed. Since an accurate assessment of ground speed is essential in calculating the amount of “wheel creep” allowed at any given moment, some alternative method of measuring ground speed must be implemented. The method employed on the GT46MAC is K-Band RADAR.

Figure 9D-25 shows the K-RADAR module and its mounting location under the cab of the locomotive near the end plate. This particular type of RADAR system mounts at an angle of 37.5° with respect to the rail. It is particularly susceptible to signal error as a result of inaccurate mounting. More information on RADAR, including how to troubleshoot suspected defects, can be found in Section 9J of this manual.

When the RADAR system fails to operate or provide an accurate signal, then “wheel creep control” as executed by the EM2000 is no longer possible. The same was true for older model DC locomotives. In the past, the EMD control system would fall into its “back-up” wheel slip detection / correction system called IDAC (Instantaneous Detection and Correction). With the AC traction systems built by Siemens, a similar situation occurs.

9D-24


0 The IDAC back-up wheel slip system is no longer a part of the EMD control system logic. Whenever the RADAR signal is determined to be invalid (in the instance of a RADAR failure), the Siemens back-up wheel slip system takes over. The back-up system is a sort of hybrid of the old IDAC system that so many are familiar with, and the Super Series wheel creep control that evolved with the EMD 50 Series and later locomotives. To understand the system, let’s take a look at a simulated “strip” chart to examine system reaction to various events. Figure 9D-26 shows the strip chart simulation for a single inverter to be examined. Only speed and torque will be examined here. The lower portion of the graph shows torque. The upper shows wheel speed. Delta N or dN is the amount of creep the wheels are allowed. Adding this number to the actual ground speed, N, yields the value for wheel rotational speed limit at that particular time. For example, if ground speed, N, is 5 MPH, and dN is 0.7 MPH, then the wheels will be allowed to rotate at a maximum of 5.7 MPH. If the wheels exceed 5.7 MPH, then torque from the inverter will be reduced.

F43646

Figure 9D-26 Torque vs. Speed strip chart Following the chart from the left we encounter point 1. Speed is at 5 MPH and the wheels have begun to exceed ground speed, but they have not yet reached the restricting N+dN limit. For this reason, torque remains steady. As time goes by we come to point 2; wheel speed has exceeded the N+dN limit. In order to control the wheels, torque must be reduced as the chart demonstrates. Once wheel speed falls back below its N+dN limit, then torque can be steadily increased again. This is represented at point 3. At point 4, the wheels hover just below the N+dN limit, but never exceed it. For this reason, torque is not reduced. At point 5, we notice that a RADAR failure has occurred recently. When a failure occurs, the Siemens system takes over. It sets an N+dN limit of approximately 10% of the last valid ground speed measurement. This is what makes it different from the IDAC system of the past. At this point, we see that the torque reduction in the event of N+dN being exceeded is much more aggressive than the primary creep control system. Furthermore, the recovery back to full torque takes longer as well.


The main difference in the back-up wheel creep system and the primary wheel creep systems are as follows. •Back-up has only one N+dN limit. It cannot adjust the limit based on speed, throttle, etc. •Back-up system reaction to wheel slip is much more aggressive. •Back-up system is much slower to recover.

9D-26


0

SECTION 9E. TCC COMPONENTS NOTE:

For maximum safety wear high voltage gloves (>4000 V DC) during the measuring and grounding process. Discussions in previous Sections have covered some of the major AC traction system components in light detail. In this Section, we will cover each of the components housed by the Traction Converter Cabinet (TCC) as well as any components closely related with (and sometimes assumed to be a part of) the inverter. Traction computers (also known as Traction computers or a TC) receive more attention in this section where each printed circuit board and component in the TC room is discussed. Much of the information contained in this module was provided by Siemens Transportation Systems.

SAFETY PRECAUTIONS Before discussion of any traction inverter system components takes place, some safety precautions pertaining to work with high voltage systems must be covered. Unlike the high voltage circuits implemented on conventional DC traction locomotives, the AC inversion system design requires storage elements (capacitors). In order to ensure safe working conditions, proper discharge and grounding procedures must be followed. This procedure can be found on WARNING tags on the High Voltage Cabinet upper doors in the cab. Be certain to adopt these practices when working near high voltage circuitry on this locomotive. As the inverter on this locomotive is of the Voltage Source type, capacitors connect in parallel with the load to provide a constant voltage supply. Eight “cannon type” capacitors per TCC form a storage bank for energy. This bank has the capability of storing a fault condition DC Link overvoltage charge of 3600 VDC, though the nominal charge does not exceed 2700 VDC. Several automatic discharge systems operate on this unit. Recommended procedures, according to the publication, "Safety Precautions for GT46MAC Locomotives", ought to be pursued.

DANGER! High Voltage within Cabinets Be sure to follow the discharge procedures as outlined in the publication “Safety Precautions for GT46MAC Locomotives” in appendix C when working on High Voltage Components

TCC COMPONENTS 9E-1

ORIENTATION AND LAYOUT The traction system of the GT46MAC utilizes one TCC or inverter per truck. Figure 9E-1 shows the location of each of these cabinets. Cabinet orientations, with respect to the locomotive, do not match identically. The phase module side of each cabinet is noted in the diagram.

F43650

SIDE VIEW

Figure 9E-1 Cabinet locations.

1. 2. 3. 4. 5. 6.

KNORR electronic air brake equipment (engineer's side). High Voltage Cabinet. #1 inverter cabinet. AC cabinet (engineer's side). #2 inverter cabinet. Battery box.

Let’s examine the Figure 9E-3, and assume for the sake of example that we are talking about TCC #1. For clarity, walls and doors that might otherwise obstruct the view are not shown in the diagram. View 1 shows the TCC as seen from the operator’s side walkway. In the shorthood side of the cabinet are the Phase Modules, A1, A2, & A3. Mounted directly to the longhood side of each Phase module is a Gate Unit, A1-11, A211, & A3-11. In the upper left portion of the view (longhood end) resides C11..15, the capacitive grounding set of capacitors, as well as temperature probe F2, a PT 100 type which measures air temperature above the R2 snubber resistor. Taking up a large portion of the view here is the capacitor bank C1..C8. These are the DC Link Capacitors. Access to the terminals is gained only from View 1. The elements are mounted in a recessed location to provide working space. Just below the DC Link capacitor bank are the components used in the Inverter Protection System or IPS. Components of the IPS are discussed later in the section. Below the IPS, very near to the walkway, sits a row of connectors Xa..Xg. 9E-2


0 These connectors are the TCCs link with the entire outside world including EM2000 interface, feedbacks from probes, and outputs to drive devices. Mounted below the IPS, near the center of the cabinet but toward the longhood, is C21..24. This bank composes a snubber capacitor used in conjunction with the R2-snubber resistor seen in Views 2 & 3. View 2 shows the opposite side of the cabinet. Again assuming we look at TCC #1, this view can be seen from the conductor’s side walkway. The DC Link Capacitor bank, C1..8, comes nearly flush with this side of the cabinet. In other words it is not recessed as it was from the other side. The upper left or shorthood side contains the TC which is called out as TCC A5 in the drawing. Just below the TC room mounts the snubber resistor, R2. This ribbon grid type resistor requires a cooling air flow which is generated by the M1 blower mounted directly behind it. Below R2 are the DC Link input terminals P & N, as well as the 3-phase output terminals R, S, & T which connect to the traction motors.

F43651

Figure 9E-2 View of the TCC Terminals Box As in View 1, the IPS mounts directly below C1..8. Finally, in the lower right portion of View 2 is L1..3. This reactor limits DC Link current surges when the GTO thyristors fire. View 3 of the cabinet can be seen from the Dynamic Brake Grid Blower Motor room just behind the High Voltage Cabinet. The TC room occupies the upper right or conductor’s side of the TCC. In the center appear components X1, X2, Z1, Z2, etc. These are contained within the Traction Computer room. Most are power supply components. Along the left or operator’s side of the TCC, are the phase modules. In the lower center area is C21..24, which was also identified in View 1. The snubber capacitor group actually resides at the rear of this view or in the longhood side of the cabinet. In the center of the entire cabinet is the blower, M1. Recall that air is drawn in across the phase modules and forced out through the snubber resistor. Lastly, several feedback devices mount in the lower right of this view. U1 is the DC Link Voltage transducer, while U3..5 are the output current transducers (one per phase). Also, T1 & T2, which are output voltage transformers, mount here and monitor two of the three phase voltages (which is sufficient for calculating motor field flux). TCC COMPONENTS 9E-3

Figure 9E-3 Traction Converter Cabinet views

The cabinets mount 180° opposite each other. Air is taken from the central air compartment and used for cooling and pressurizing in some (but not all) parts of the inverter cabinet. This air supply keeps dirt from contaminating areas containing DC Link Capacitors, Gate Units, and Traction computers. Because the source is the central air compartment, the air has already been inertially filtered. In addition to this filtering, a paper filter for each cabinet located under the cabinet just below the phase modules serves to clean the supply an extra step. This air supply is not the same as that used for phase module cooling. Air for phase module and cabinet cooling comes directly from the ambient supply. A blower in each cabinet driven by its own 3-phase AC, motor draws the air in across the modules and expels it across the R2-snubber resistor. Since the cabinets mount opposite each other, air draws in on the engineer’s side of the locomotive for TCC #1, and in on the conductor’s side for TCC #2. Figure 9E-1 shows the proper direction for air flow through each cabinet. 9E-4


0

INVERTER COMPONENTS The contents of the inverter cabinet can, for the most part, be sorted into four categories. These groups are: 1.Power parts 2.Protection parts 3.Feedbacks 4.Traction Computer parts. We begin here by examining the power parts which involves components needed for creating a smooth supply of three-phase AC power to the traction motors from the DC Link input voltage. Be aware that many components within the inverter may carry DC Link voltage regardless of physical appearance or size!

POWER PARTS TCC BLOWER The blower motor is, as mentioned before, a dual speed three-phase AC induction motor. It can operate as a parallel-Y wound machine for high speed, and as a series-Y wound machine for lower speed. (Only the low speed configuration is used on GT46MAC locomotives) Power for the motors is taken from the Companion Alternator through the main contacts of TCC1SS and TCC2SS. From the contactors, power is routed to the Xg connector in the TCC. Connectors Xa..Xg can be seen in Figure 9E-4. The Xg connector is the interface for power connections to the motor between EMD & Siemens wiring.

F43652

Figure 9E-4 TCC connectors Xa..Xg.

TCC COMPONENTS 9E-5

f43653

Figure 9E-5 TCC Blower motor The EM2000 exercises control of the blower contactors at the request of the Traction computer via RS-485 serial link. The blower is one of the Siemens components that does appear in the EMD schematic as well as the Siemens print. Notice that wire identification from the Xg connector to the blower does not appear in the EMD print, but does (as color-coded) in the Siemens drawing.

F43654

Figure 9E-6 TCC Blower in EMD print 9E-6


0

F43655

Figure 9E-7 TCC Blower in Siemens Print

PHASE MODULES Phase modules are used to “chop” the DC Link into a simulated three-phase AC system which is used as Traction motor input. An evaporation bath dissipates thermal losses of the GTO thyristors and other elements contained within the module. This bath fills up approximately 2/3 of the container. As seen in Figure 9E-8, each module contains 2 GTO thyristors (V1, V2), 2 free wheeling or anti-parallel diodes (V3, V4), snubber elements, heating elements, and a temperature probe. All components within the module, with the exception of the temperature probe and heating elements, are permanently fixed in a clamping compound. Semiconductors V1..6 are assembled in columns with heat sinks between them. Mounted externally on the module (but not permanently) is a Gate Unit, shown in Figure 9E-8 as two boxes labeled A11. The Gate Unit consists of two Gate Drivers and a two channel controller. The Gate Unit serves as an interface between the Traction Computer and the GTO. This assembly is discussed more in detail later in this module. TCC COMPONENTS 9E-7

The snubber circuit within the phase module consists of 6 capacitors (C1..C6), 3 resistors (R1..R3), and two more diodes (V5, V6). This snubber circuit acts to limit voltage spikes on the AC side of the inverter created by GTO switching (snubber capacitors C21..C24 serve this function on the DC side). An external ribbon grid type snubber resistor consumes overloads of the snubber circuit within the phase module. Notice that only major power components and a few snubber elements within the module are shown.

f43662

Figure 9E-8 Phase Module circuitry There are 12 terminals on each phase module. The connections are as follows.

Terminal #

9E-8

Purpose

1

Connects to R2 snubber resistor

2

Positive DC link input

3

AC load output (to Traction motor)

4

Negative DC Link input

5

Heater power supply from CA6A

6

Heater power supply from CA6A

7

Not used

8

Not used

9

GTO (V2) gate supply

10

GTO (V2) gate return

11

GTO (V1) gate supply

12

GTO (V1) gate return


0 There are a few ways in which the TC can detect a suspected phase module failure. First, if DC Link Voltage breaks down without one of the crowbars being fired, a short circuit of the DC Link via GTO thyristors may be possible. Second, the Gate Unit may signal that one of the GTOs could not be switched off, meaning possible GTO failure. Third, an overcurrent at the output of the module may indicate a failure. HEATING ELEMENTS The heating elements are resistors R4.7 which are permanently fixed within the module. Module heating is needed for proper operation of the semiconductors at extremely low temperatures (The heating elements are not connected on the GT46MAC locomotives).

F43663

Figure 9E-9 Gate Unit Assembly.

GATE UNIT ASSEMBLY A Gate Unit Assembly performs essentially the same duties as the FCD module does in the EM2000 control system. The GTO is a “controllable” semiconductor just as the SCRs in the Main Generator excitation circuit are. In order to control when these semiconductors do conduct, a control signal must be applied. Unfortunately, the required signal is much stronger than a computer’s 5 VDC circuitry can provide. Therefore, an intermediate device (signal transformer or booster) must be implemented. This device, in the case of the TCC, is the Gate Unit Assembly or GU. A GU mounts on the front of each phase module with screws. The assembly consists of three separately shielded sections. Two of the sections are identical. The two identical sections are the “gate drivers.” Each gate driver controls a single GTO. At the bottom of each gate driver are three LEDs: one red, one yellow, one green. The location of these indicators is illustrated by Figure 9E-10. TCC COMPONENTS 9E-9

f43664

Figure 9E-10 Bottom view of Gate Unit showing LED location These LEDs indicate the following LED color RED

Meaning Firing pulse received from TC

GREEN

No firing pulse received from TC

YELLOW

Fault condition. Firing pulse not received by GTO. Signal lost on GU wiring or bus bar from GU to phase module

WARNING Be aware that the black shielding covers on the Gate Unit Assembly, as well as many other inverter parts, are under high voltage when loading! If the Assembly functions properly, both the red and green LEDs should appear to be “on” simultaneously whenever the locomotive is loading to that inverter. In actuality, they are pulsing on and off at a very rapid frequency, so high that the human eye cannot detect it. In fact, the two LEDs are (again in actuality) never “on” at the same time; they alternate (but again the human eye cannot detect this). Should the yellow LED appear “on” at any time, this may be an indication of a failed Gate Unit. The yellow LED actually indicates that the GTO never received its firing pulse. This firing pulse may have been lost due to a wiring/connection failure resident to the GU or on bus bar connections between the GU and phase module. The third section of the Gate Unit Assembly is a two channel controller. This controller acts as the interface between the 5 VDC system of the Traction Computer and the high voltage output on the “Gate Drivers”, which drive the GTO thyristor. On the cover shield of this portion is a 10 terminal AMP-plug. This plug “locks” into position via plastic clamps on either side when applied, to ensure continuity of connections. During normal operation, the plug tends to "sag" in the receptacle ever so slightly. This movement causes momentary loss of continuity in the connections. Many times, the connection is tie-wrapped to prevent this trouble. The pin configuration of the plug follows. 9E-10


0

Pin #

Signal

1

24 VDC power supply

2

24 VDC power return

3

GTO (V1) ON

4

GTO (V1) OFF

5

GTO (V2) ON

6

GTO (V2) OFF

7

GTO (V2) storage time exceeded fbk. to TC

8

GTO (V2) storage time exceeded fbk. to TCB (A11)

9

GTO (V1) storage time exceeded fbk. to TCB (A11)

10

GTO (V1) storage time exceeded fbk. to TC

Weak Gate signals from TC

Pins 1 & 2 are the 24 VDC GTO power supply that originates from PS-GTO (power supply). This power enters the TCC via connectors 1XE and 2XE pins 2 & 4. Pins 3-6 of the controller connector carry the "weak" gate signals from the TC. These are current signals of 70mA. Pins 7 & 10 provide feedback to the TC via 12 VDC signal to indicate a storage time exceeded fault. These signals, as well as the "weak" gate signals can be measured with respect to common on the 15 volt power supply (board C121). Be sure and measure the signal with respect to the C121 Module for the inverter being worked on. Pins 8 & 9 provide same signals to the Thyristor Control Board (TCB). In the case of the TCB feedbacks, though, a 70 VDC signal means everything is OK, while <5 VDC indicates storage time exceeded. Two bus bars connect from the phase module to each gate driver (a total of four bars per phase module, since there are two gate drivers). The bus bars carry the pulses that turn the GTOs on and off. Terminals 9 & 10 of the Gate Unit mate with the G & K bus bars that run to the positive DC Link GTO. Terminals 11 & 12 mate with the G & K bus bars that go to the negative DC Link GTO. The potential across these bars may be measured to determine if a GTO has a firing pulse sent into the module, however, for safety reasons this should only be done when running a gate pulse firing test. If G to K is -15 VDC, then the GTO should be OFF. Likewise, if G to K is +2 VDC, then the GTO should be ON. Again however, for safety reasons this should only be done when running a gate pulse firing test.

TCC COMPONENTS 9E-11

GATE UNIT POWER SUPPLY FILTER

f43665

Figure 9E-11 Typical Siemens Gate Unit Power Supply Filter. Power required to gate the GTOs comes from the Auxiliary Generator. Threephase AC is taken from the machine before it is rectified to DC. This approximate 55 VAC runs to the GTO Power Supplies PS GTO1 and PS GTO2. These units, located in the low voltage cabinet, provide the 24 VDC supply for each inverter. AC ripple or “noise” in the 24 VDC supply lines may be induced before reaching the Gate Units. In order to correct this undesirable condition, the filter unit protects against high frequency transients on the supply lines. It is located within the Traction Computer filter assembly of the TCC along with Traction Computer power supply components. The device appears as Z101 or Z201 in the Siemens print. Notice that the device appears as a box indicating Line and Load sides but no indication is given as to which terminals bear which wires.

9E-12


0

F43666

Figure 9E-12 Select portion of Siemens print.

GATE UNIT POWER SUPPLY FILTER DECOUPLING DIODE The diode appears as circuit element V10. Its purpose is to decouple the Gate Units from the power supply source. In the event that the power supply fails, enough energy needs to be retained in the Gate Units to fire the protection thyristors, and turn off any GTO's that may have been on at the time of the fault. The C31 buffer capacitor retains this energy, but the energy would drain back toward the source in the event of a source failure. To prevent this, the V10 diode is placed in the circuit. It is located within the TC room, near the Filter Gate Unit Power Supply. Figure 9E-13 shows the location as it mounts in the TC room as well as a single shot of the device dismounted.

Figure 9E-13 Gate Unit Power Supply Filter Decoupling Diode TCC COMPONENTS 9E-13

CAPACITIVE GROUNDING CAPACITOR AND PERMANENT DISCHARGE RESISTOR The capacitors C11, C12 & C15 create a permanent capacitive tie to ground for the TCC. Resistors R11& R12 connect in series across the DC Link to create a permanent discharge path. These are sometimes referred to as bleeder resistors because they constantly “bleed voltage” from the respective DC Link capacitors. Should the standard “quick discharge” systems on the unit not be operational for some reason, these resistors will decay the DC Link. Unlike the “quick discharge” paths, though, these resistors are of fairly high resistance at 68 kohms each. At this level, the resistors will decay the Link within about five minutes.

f43276

Figure 9E-14 Location of Capacitive Grounding Capacitor and Permanent Discharge Resistor

WARNING These are not designed for use as rapid discharge elements! They will not discharge the Link as rapidly as the 5 seconds provided by Dynamic Brake grid resistors.

These elements appear on the Siemens print as well as the EMD print for TCC #1 and TCC #2. The components are not labeled in the EMD print, though Figure 9E-15 shows the components as they appear in the Siemens print while Figure 9E-16 shows the EMD print for TCC #1. The components in the EMD print have been artificially labeled for the purpose of comparison.

9E-14


0

Figure 9E-15 Siemens print

f43670

Figure 9E-16 Siemens components in EMD print


R2 SNUBBER RESISTOR The R2 snubber resistor discharges any overload of the elements within the phase module snubber circuit. It mounts just below the DC Link Capacitor bank in the direct path of the TCC Blower air flow. Much like dynamic brake grid resistors, this resistor is constructed of a long ribbon of metal for low resistance in order to dissipate high amounts of power very quickly, hence the need for it to be situated in the path of cooling air.

F43671

Figure 9E-17 Location of R2 Snubber Resistor These capacitors, C21..C24, connect in parallel with each other, and with the R2 Snubber Resistor and other snubber elements within the phase modules. The purpose of these devices is to aid the snubber circuitry inside each phase module in limiting AC ripple in the TCC output. Without the snubber elements, voltage spikes result in TCC output by the switching of the GTO thyristors. This set mounts in the base of the cabinet below the DC Link Capacitor bank, and interconnect, via bus bar. They appear in Figure 9E-18.

F43672

F43672

Figure 9E-18 Snubber Capacitor(s) C21..24 9E-16


0 REACTOR CORE L1 .. L3 The reactor cores L1...L3 limit the surges in DC Link Current caused by the switching of the GTO Thyristors. 54 cores in all make up the reactor set. Each branch of the assembly contains 18 cores. The set supplies one branch per phase module. The branches as they appear in the Siemens schematic as shown in Figure 9E-20.

F43674

Figure 9E-19 Typical Reactor Core

F43675

Figure 9E-20 Selected portion of Siemens Print TCC COMPONENTS 9E-17

DC LINK DECOUPLING REACTOR L456 This reactor reduces power oscillations between the two inverters (one inverter per truck). Connected in parallel with each reactor half is a damping resistor to assist in minimizing power oscillations. The resistors, though not shown in the schematic, are located in the cage assembly for IPR #1 as seen in Figure 9-21. The reactor is located outside of TCC#1 in the Main Generator room. Only one device is required since it is installed between the two cabinets (electrically). The device shows in the EMD print, but it is physically only one device as seen in Figure 9E-22. Figure Figure 9-21 shows its location in the Main Generator room.

f43676

Figure 9-21 Location of DC Link Decoupling Reactor (left Figure 9E-22 L456 DC Link Decoupling Reactor uncovered with carbody removed (right)

F43677

Figure 9E-23 L456(L11 according to Siemens) in EMD print 9E-18


0 DC LINK CAPACITORS C1..C8 The DC Link Capacitors act to buffer the DC Voltage supplied to the inverter such that the level input to the TCC remains fairly constant. Eight elements in each cabinet connect in parallel to form a single bank to perform this function. These are sometimes referred to as “cannon” capacitors due to their long, narrow, cylindrical shape. The terminals for the elements are toward the inboard side of the TCC. These capacitors do store DC Link voltage. Be sure to follow the proper precautions when working around them. If they are to be worked on, be sure the system has been properly discharged. A tell-tale warning sign of failure may be bulging of the can, and "oozing" of capacitor fluid from the back side. The back side view is shown by Figure 9E-24 while Figure 9E-25 shows the terminal side of the capacitors.

f43276+

Figure 9E-24 DC Link Capacitors as seen from Phase Modules (terminal side)

F43678

Figure 9E-25 DC Link Capacitors as seen from R2 Snubber Resistor (back side) TCC COMPONENTS 9E-19

PROTECTION PARTS Power parts within the inverter can be damaged as a result of overvoltages, power supply failures, or other faults For example, if power to a Gate Unit is lost for some reason, the GTOs within the Phase Module being controlled by that GU would probably fail, resulting in a failed phase module. This is neither practical from a repair nor a cost stand point. Therefore, an extensive protection system must be in place to reduce the likelihood that damage might result. For this reason, each TCC has a built-in protection system called the IPS or Inverter Protection System. Introduction of these components is covered here, but logic of the system concerning restriction on inverter loading is discussed in other sections. THYRISTOR CONTROL BOARDS From time to time, it may become necessary to discharge the DC Link at a near maximum rate for the purpose of protecting the TCC components. Two rapid discharge mechanisms have been built into the TCC. Both are called "Crowbar" devices, one referred to as "hard" the other as "soft." The difference between them is that the "hard" creates a direct short circuit across the DC Link, while the "soft" creates a connection across DC Link with an impedance of only about 3 Ohms. For most intents, either acts to discharge DC Link rather hastily. The Thyristor Control Boards or TCBs (A11 & A12) fire or trigger crowbars by transforming a 100 mA signal sent from either the TC or the Gate Unit. The current signal is converted to driver pulses for the Impulse Transmitters (A13 & A14) which actually fire the crowbars. When a TCB does operate, it also provides a feedback signal to the TC to signify that the crowbar has fired. The TCB designated as A11, controls firing of the hard crowbar in conjunction with Impulse Transmitter A13, while Thyristor Control Board A12 works with Impulse Transmitter A14 to operate the soft crowbar. The TCBs (as well as the Impulse Transmitters) are located just above the L1..3 Reactor core on the R2 snubber resistor side of the TCC as shown in Figure 9E-26. Figure 9E-27 shows a TCB up close while Figure 9E-28 of the following page shows how it appears in the Siemens print.

9E-20


0 .

F43679

Figure 9E-26 Location of TCBs (top) Figure 9E-27 TCB up close (bottom)

F43680

Figure 9E-28 Thyristor Control Board in Siemens print. TCC COMPONENTS 9E-21

Input signals to the board(s) are as follows. Connector

Pin#

Function

X7

/1

Trigger signal from GU phase R

X7

/2

Trigger ground for pin 1

X7

/3

Trigger signal from GU phase S

X7

/4


X7

/5

Trigger signal from GU phase T

X7

/6


X7

/7

Not used

X7

/8

Trigger signal from TC

X7

/9

“NO” trigger signal from TC

X7

/10

Power supply return (see pin 12)

X7

/11

Shared ground for pins 8 & 9

X7

/12

24 VDC power supply (to fire thyristors)

X5

Tied to other TCB - works with X6

X6

Feedback from T3 - crowbar detection

Any of the Gate Unit Assemblies can request that protection thyristors, Hard Crowbar in this instance, be fired. The trigger signal from GUs comes in on pins X7/ 1, 3, & 5 while their returns are X7/ 2, 4, & 6 respectively. Pins 8 & 9 carry a “yes” or “no” trigger signal from the TC. Pins X7/ 10 & 12 carry the 24 VDC power supply needed to trigger the thyristors. Connectors X5 & X6 work together to communicate whether or not the appropriate crowbar does fire.

Figure 9E-29 C31 capacitor in TC room. Power needed to fire the protection thyristors that make up the crowbar circuit comes from the 24 VDC Gate Unit power supply. One instance in which crowbar firing must be requested is when the 24 VDC power supply is lost. But if the 24 Volt supply is lost (meaning that a thyristor cannot be operated), how can the TCB trigger the protective devices? 9E-22


0 The answer is the C31 Buffer Capacitor. This capacitor, located within the TC room, filters the 24 VDC supply and also acts as the source of energy to fire protection thyristors and shut off any GTOs that may be "on" if the normal 24 VDC supply is lost. The Gate Unit Power Supply Decoupling Diode V10 (discussed earlier), prevents this capacitor from draining back into the supply system. The capacitor is pictured in Figure 9E-29. Output signals from the TCB are as follows.

Connector

Pin#

Function

X14

Control pulse for impulse Transmitter

X2

Control pulse for Impulse Transmitter

X3


X4


X7

/13

Feedback to TC board

X7

/14

Return for X7/pin 13

Connectors +X1..+X4 carry the signals to the Impulse Transmitter with which the TCB works. These signals are amplified by the transmitter and used to handle the actual operation of the crowbar. Connector X7 pins 13 & 14 carry feedback signals into the TC board G043, GU Driver Board. At the front connector of G043, pins b08 & d04 notify that A11 has operated the hard crowbar, while pins b12 & d12 notify that A12 has triggered the soft crowbar. A reading greater than 4 VDC across the appropriate pins means that triggering occurred. Under most firing conditions this reading will be in the neighborhood of 12 VDC. Less than 1 VDC indicates the standby level in which no firing occurs.

IMPULSE TRANSFORMER

F43681

Figure 9E-30 Impulse Transmitter


Figure 9E-31 One Impulse Transmitter in Siemens print This transformer takes the input voltage from either Thyristor Control Board, and steps up the signal to a level capable of driving the thyristors. The devices appear on the Siemens print which is shown by Figure 9E-31. A14 appears on the right hand portion of the schematic. Again, this transformer drives the soft crowbar. This can be seen since the IPR (Inverter Protection Resistor) connects in series with thyristor V4. When A14 drives V4, DC Link discharges through IPR taking 3 to 5 seconds, depending on DC Link level at the time of triggering. A13 drives V1...V3 and appears on the left hand side of the schematic, A13 drives V1..V3. When such occurs, these 3 parallel thyristors create a direct short across DC Link causing a nearly instantaneous discharge of the Voltage Source.

BREAK-OVER-DEVICE (BOD) The TC takes many actions to guard the TCC against overvoltages. From time to time, however, these actions may not be sufficient to stop the rise of DC Link. For example, the TC may be under a fault condition and unable to recognize or respond to a potential overvoltage situation. In such a situation, where the TC “has its hands tied,” a hardware backup device must be in place. The BreakOver-Device serves in this capacity. It is sometimes called Break-Over-Diode, because of its function, even though it is not really a diode.

9E-24


0

Figure 9E-32 Break Over Device location. The BOD, represented as A10 in the Siemens print, consists of a voltage divider that measures the sum of all snubber elements and DC Link. Should the sum exceed 3600 VDC ± 50 VDC, the BOD drives the A13 impulse transmitter, which fires the hard crowbar, leading to an immediate breakdown of DC Link voltage. The BOD, labeled A10, appears on the Siemens print, which is shown in Figure 9E-33. Terminals X1 & X10 connect with positive and negative DC Link respectively while X5 & X7 are respectively the positive and negative trigger pulses to the A13 impulse transmitter.

Figure 9E-33 BOD in Siemens print. TCC COMPONENTS 9E-25

PROTECTION THYRISTOR SET Each TCC contains a Protection Thyristor Set (A4), consisting of 4 thyristors (V1..V4). These elements are part of the IPS (Inverter Protection System). These thyristors are neither the same type nor of the same function as those used within the phase modules. Rather, these thyristors are similar (in function but not physical structure), to those used in the Main Generator’s excitation circuit called SCRs. Unlike a GTO which can stop conducting when given a signal to do so, once these elements are given an “on pulse,” they continue to conduct as long as the forward voltage across them remains positive. The thyristors are pictured in Figure 9E-34. All four mount in a chassis accessed from the R2 Snubber Resistor side of the cabinet.

PROTECTION THYRISTOR SET

Figure 9E-34 Location of protection thyristors (above).

Figure 9E-35 Protection thyristors or Crowbars in Siemens print.

9E-26


0 The thyristors appear in the Siemens print. The dotted box labeled as A4 represents the set, and V1 through V4, the individual components. V1 through V3 all fire simultaneously to create the hard crowbar. V4 fires alone, but with the IPR connected in series creates the soft crowbar. As mentioned before, the hard crowbar makes a dead short circuit with practically zero impedance across the DC Link, while the soft crowbar does the same but includes the IPR with an approximate 3 Ohm impedance. Figure 9E-36 shows a block diagram of all components in the IPS, and shows how they fire either hard or soft crowbars.

Figure 9E-36 #1 Inverter Protection System. TCC COMPONENTS 9E-27

PROTECTION SYSTEM CURRENT TRANSDUCER

Figure 9E-37 T3 Protection system current transducer

Figure 9E-37 shows a photo of the device. The function of this transducer (though it is more like a transformer, is to detect whether or not a crowbar has operated. It appears on the Siemens print. The device has a hole through the center to allow for the conductor being measured to pass through. The conductor serves as the primary windings. The secondary windings of T3 connect to the TCB. They inform the TCB that a crowbar has fired. The polarity of the feedback signal tells the TCB which crowbar has fired, therefore proper wiring to and from the device is essential. The actual transformation ratio of the device is 400 A / 0.1 A.

TCC PROTECTION REACTOR L12

Figure 9E-38 TCC Protection Reactor.

9E-28


0 This reactor appears on the Siemens print as well. It is connected in series with the hard crowbar thyristors. Because a hard crowbar firing implements an essential dead short circuit across the DC Link, the rise in DC Link current in such an event would be enormous. To remedy this, the L12 TCC Protection Reactor is installed to limit the rise in DC Link current when the hard crowbar is fired. Figure 9E-38 shows the reactor as seen from the phase modules. The cabinet used in this photo is not fully assembled. CROWBAR RESISTOR (IPR) The Crowbar Resistor, or as it is more commonly known the IPR (Inverter Protection Resistor), can be found on the Siemens print. Though it mounts external to the TCC, it does not appear in the EMD print. Its purpose is to dispose of DC Link energy more gracefully than a hard crowbar, in the event of a soft crowbar firing incident. One resistor per TCC is required. For TCC #1, the IPR mounts on its long hood side outside wall which is actually an inside wall for the Main Generator room as seen in Figure 9E-39. The cage housing IPR #1 also includes 2 damping resistors which connect in parallel with the L456 DC Link Reactor located in the Main Generator room. Their function is to assist L456 in the reduction of power oscillations on the DC Link, especially in brake mode.

TCC #1

TCC #2

Figure 9E-39 Location of Crowbar Resistors or IPRs. The resistor is contained within a cage since it becomes very hot to the touch when the "soft" protection crowbar fires. Not to mention electrically “hot”, it is of similar design to that of the R2 Snubber Resistor (which is continuously "hot" physically and electrically whenever the TCC is under load), and the Dynamic Brake grid resistors in that they are all low resistance, high power consumption components. Similarly, the IPR is a ribbon type, but with much less surface area and no forced air cooling supply. For this reason, the IPR cannot sustain a constant DC Link load very long without burning open. Such may be the case if the locomotive fails to unload after firing the soft crowbar. This should not happen since system design specifies that the hard crowbar fires 1 second after any soft crowbar trip. Figure 9E-40 shows the crowbar circuits. TCC COMPONENTS 9E-29

.

Figure 9E-40 Crowbar Circuit. 9E-30


0 RING BACK DIODE NOTE! This unit model is equipped with a 800 ampere starting fuse. Observe markings on panels to avoid interchange of incorrectly rated fuses.

Figure 9-41Ring Back Diode location The Ring Back Diode consists of four diodes (V5..V8) connected in parallel. The set connects parallel to the DC Link, but the cathode mates with negative DC Link so that the set is reverse biased under normal operating conditions. Their purpose is to protect the free-wheeling diodes, contained within the phase modules, against potentially damaging current levels in the event of a crowbar firing. They appear on the Siemens print.

FEEDBACK SYSTEM COMPONENTS MODULE TEMPERATURE PROBE F30 The F30 phase module temperature probe is a PT 100 type. It is intended to measure the temperature of the cooling bath. The measurement by the probe is actually of the aluminum casting that forms the module housing. The TC takes feedback from the probe and considers heat transfer characteristics of the casting in determining a close estimate of the cooling medium temperature. Recall that the probe must indicate module under-temperature, as well as over-temperature.


Figure 9E-42 F30 temperature probe location in Phase module

Figure 9E-43 F30 Probes in Siemens print As the cooling medium heats up, the pressure inside the module builds. When constructed, the pressure inside the module is at atmospheric conditions. Under extreme loading, though, pressure normally rises to approximately 2 bar (29 psi.). For safety reasons, a non-resettable pressure relief device operates at 3.5 bar (54 psi.).

9E-32


0 The F30 probes (one per module), appear on the Siemens print for inverter #1 as illustrated by Figure 9E-43. Four connections at plug X2 carry the needed signals as follows. Pin#

Signal

1

Constant current source supply (+2mA)

2

Feedback (temperature dependent)

3

Feedback return (common)

4

Constant current source return (-2mA)

For all PT 100 type probes, PT stands for platinum while 100 means that the probe has a resistive value of 100 ohms @ 0°C. Furthermore, a properly working probe shows a resistance of 107.7 Ohms at 20°C (68°F), and 108.5 Ohms at 22°C (71.6°F). Figure 9E-44 demonstrates this as a graph of resistance versus temperature for various readings. For this particular probe, this value can be measured on pins 2 & 3 at the X2 plug. Perhaps an easier place to measure is at the input to the TC. This input feeds into module board G075 (Temperature Acquisition) of the TC. The front connector on this module can be pulled off where access to pins is gained.

Figure 9E-44 PT 100 Temperature Probe Graph of Temp vs. Resistance


In the event of a phase module over-temperature, the Traction Computer must take protective action to prevent damage to inverter components. Specifically, the TC begins to limit torque output of its inverter thereby reducing the load placed on the phase modules. Different amounts of power reduction result, for varying degrees of over-temperature.

The following table provides the approximated cut back values. Temperature Fahrenheit

Celsius

% of full power permitted

158°F

70°C

100%

159.8°F

71°C

67%

161.6°F

72°C

34%

163.4°F

73°C

1%

165.2°F

74°C

shut down

CAPACITOR/SNUBBER TEMPERATURE PROBES F1, F2 The F1 probe is located within the pressurized portion of the TCC on the ground bus DC Link Capacitors 1-4. The ground bus does not carry DC Link potential. F2 can be found inside the TC room but it actually measures the temperature of the Snubber resistor R2 which is directly below it. Both are PT 100 types, therefore the probes follow the same resistance characteristics as graphed out for the F30 probe in Figure 9E-44. Feedback from all temperature probes comes into the G075 Temperature Acquisition board of the TC. This can be found on the Siemens print. Figure shows the F1 probe as it appears in the print.

Figure 9E-45 F2 Temperature Probe.

9E-34


0

Figure 9E-46 F1 Probe in Siemens Print

The wires from the probe run to a terminal box on top of the stator frame. From the junction box, all probe wires from each motor feed up to the X1 connector. The Siemens print shows the temperature probe feedback lines coming to the X1 terminal strip in the TC room within the TCC. From the terminal strip, the probe provides feedback to the G075 module in the TC for processing. The table below shows the corrective actions taken by the inverter to account for overtemperatures as signaled by these probes. Traction motor overtemperatures will log a fault in the Traction Computer archives, as will a failed temperature probe. When corrective action in the form of torque level reduction is taken, engine RPM remains high in order to supply adequate amounts of cooling air.

Temperature C°

Actions taken by EM2000

F°

200

392

Reduction to maximum continuous torque level

215

419

Reduction to TH 4 level torque

230

446

Shut down of inverter

240

464

Interpreted as a failed sensor


Traction Motor Speed Probe

Figure 9E-47 Traction Motor Speed Probe.

Figure 9E-48 TM Speed Probe mounting hole Each motor contains a receptacle for a magnetic speed pickup. This probe measures the speed of the rotor, not the speed of the axle. The data acquired feeds back into the TC, and gets passed on to the EM2000 via RS-_485 serial link for use in wheel creep control among other things. Probes from motors 1/4 & 2/5 feed into board G059 while motor 3/6 feeds into board G067. Each of these boards handle analog input and output. They appear on the Siemens print.

9E-36


0 Just like the magnetic speed pickup used to monitor engine speed, the mounting of this device is critical to providing accurate feedback. Should the probe be mounted incorrectly, the wheel creep control system may not work at optimum levels, meaning reduced adhesion levels. Since the mounting is not adjustable in terms of depth into the hole, care should be taken to ensure that the mating surfaces between the probe and motor housing are free of dirt and other obstructions before installation. The probe has a keyway to assure proper alignment. TDC LINK VOLTAGE TRANSDUCER U1 Although the EM2000 already measures each DC Link voltage with very similar transducers, it is necessary for each inverter to verify that voltage actually arrives at the inverter. These are the transducers that report DC Link voltages back to the EM2000 during the DC Link Shorting test, which verifies whether or not the voltage supply system has discharged. The device requires a 24 VDC power supply and produces a current output in proportion to the measured voltage. The range of the device is +4200 to -4200 VDC at less than 1.5 % deviation.

Figure 9E-49 DC Link Voltage transducer. (left) Figure 9E-50 DCL V transducer in print (right).

The device appears as U101/U201 in the Siemens print which is represented by Figure 9E-50. It provides feedback into the TC board G067 which acquires analog data. Connections to the device are as follows.


DC LINK TRANSDUCER CHART

Terminal

Function

+HT

Positive DC Link Input

-HT

Negative DC Link Input

1

+24 VDC power supply

2

Feedback signal

3

Shield to ground

4

-24 VDC power return

DC Link input comes to the device on terminals +HT & -HT. Terminals 1 & 4 provide the 24 VDC power supply, while terminal 2 provides the feedback signal into the TC. Terminal 3 is a grounding shield connected to the transducer frame and applied to ground. Feedback from this device initially runs to the G067 module in the TC, and then distributes to many different modules. Section 9F of this manual provides more information about which modules handle this signal. OUTPUT VOLTAGE TRANSFORMER T1 & T2

Figure 9E-51 Output Voltage Transformer

These devices measure two of the three phase voltage outputs from the TCC. The third need not be measured since knowing two of the phase voltages is sufficient for calculating flux. The TC uses these feedbacks to calculate the magnetic flux model of the induction motors on TC board C051. (Because flux in the motors cannot be reliably measured, it must be calculated.) Since this device is a transformer rather than a transducer, no power supply is required. As shown in Figure 9E-51, the transformer has only four connections of the Siemens print. Terminals 1 & 2 connect to the High Voltage side while 3 & 4 connect to low. The turns ratio of the transformer is 400:1 meaning that for a 4000 VAC high voltage input, the output will be 10 VAC into the TC. 9E-38


0 Normally, the high voltage part should not exceed 2200 VRMS. Data from the secondary terminals is sent into the TC via board G067. The print shows that T1 measures UR-T while T2 measures US-T. The devices also show up in the EMD print.

Figure 9E-52 Output Voltage Transformers in Siemens (left) and EMD(right) prints

OUTPUT CURRENT TRANSDUCERS U3..U5 This transducer measures the current drawn on its particular phase. Each transducer monitors a single phase. They appear in the Siemens print and the EMD print as seen in Figure 9E-52. U3 measures phase R; U4 measures phase S; and U5 measures phase T. As with the DC Link Voltage transducer, this device receives a 24 VDC supply across terminals 1 & 4, returns a feedback on terminal 2, and grounds a shield via terminal 3. The range of this device is -2500 to +2500 A at less than 1.5 % deviation. The turns ratio is 5000:1. A transducer best suits this application due to the difficulties present by measuring low frequency AC current signals. In order for a transformer to work, the input to its primary side must be rapidly changing on a constant basis. Such is the case with output voltage at all frequencies as a result of GTO switching, therefore a transformer will work. Output current, though, changes very slowly at low frequencies, and does not see a jagged pulsation due to GTO switching. For this reason, a transformer would register virtually no output at low inverter output frequencies, therefore a transducer is used.


Figure 9E-53 Output Current Transducer (left) Figure 9E-54 (Right) and as it appears in Siemens print.

9E-40


0

SECTION 9F. TRACTION COMPUTER MODULES Within each Traction Converter Cabinet resides a computer which controls the actions of that TCC. The computer is a SIBAS®16 (pronounced see-bus) built and designed by Siemens Transportation Systems of Germany. SIBAS® stands for Siemens-Bahn-Automatisierungs-System. The computer is installed in a closed metal housing which prevents the penetration of dust and moisture. Furthermore, this type of installation provides shielding against electrical and magnetic field interference. The Traction Computer receives data via the RS-485 Serial link from the Locomotive Control Computer, which in the case of the GT46MAC is the EM2000, built and designed by Electro-Motive Division of General Motors. The bidirectional bus carries data such as how much power for traction the TCC must develop as well as other information to control activation of devices like blowers and heaters. In addition to the RS-485 data, information constantly gets fed back into the ASG (Antriebs Steuer Gerät which translates to Traction Control Computer), to monitor various things such as status of relays and temperature of various components, voltages, and currents. Based on this feedback data and the information received via RS-485 serial link, the TC performs its tasks with the aid of various programs stored in memory chips. Not only do these programs work to drive the TCC, but also to protect it in the event of faulty operating conditions such as phase overcurrent or DC Link overvoltage. For any recognizable fault situation, the TC takes corrective action and, in some cases, logs a set of data relevant to the condition in a portion of memory known as the fault archives. In order to execute all of these chores efficiently, the TC is divided into several modules, each dedicated to a certain function. This design also facilitates troubleshooting and repair of the Traction Computer. Figure 9F-1 shows the construction of the TC with its various modules.

SECTION 9F. TRACTION COMPUTER MODULES 9F-1

C027

C019

C035

C121

C067 C075 C083

C043 C051

C139

C091 C099(empty)

C059

C157

C011 C003

Top C

Middle E

Bottom G G147 G003 G129 G011 G0119 G019 G027 G035 G043 G051

G059

G067 behind cables

G075

G083 (empty)

G091 (empty)

G099 (empty)

Distance from left side of chassis

Figure 9F-1 Traction Computer Chassis. Module functions include, but are not limited to, Central Processing Unit, fault data storage, input/output handling, power supplies, math functions, etc. The boards can be divided into four functional groups. 1.

Power Supplies

2.

Inputs and Outputs

3.

System Controls

4.

Service/Development & Troubleshooting

Alphanumeric names for the upper tier of modules all begin with the letter “C.” The center tier, which contains only the blowers, is labeled “E,” while the names of all lower tier modules begin with “G.” Furthermore, all modules are numbered based upon the proximity of the module with respect to the left hand side of the chassis. Modules closer to the left hand side of the chassis will have a lower numerical designation than those farther away. Each module is its own independent printed circuit board or PCB. A module slides into a rack and makes connection with a back plane when properly seated.

9F-2


0 The back plane contains a data bus that essentially serves the same purpose as a mother board in a personal computer. Dividing the portions of the computer into several modules or PCBs makes troubleshooting and repair, as well as future modification, quite simple. This module is dedicated to explaining the function of each individual module, as well as how the entire Traction Computer functions to perform its duties. WARNING! Electrostatically Sensitive Devices. When handling the components discussed in this Section, be certain to wear a grounding wrist strap. Printed Circuit boards can easily be damaged or destroyed by static changes. For convenience, a grounding wrist strap has been permanently installed in each Traction Computer room near the Power Supply modules of the TC as seen in Figure 9F-2 Please wear this strap whenever handling modules.

Figure 9F-2 Grounding Wrist Strap Storage.


Insert fold out (11x 17) GT46MAC Electrical Control System USE FILE GT46MAC2 PDF

9F-4


0

Traction Computer Module Quick Reference Guide SLOT #

NAME - function

C003

Communications - RS-485 serial link

C011

Control Set Converter - Generates gate signals

C019

Linearization Model - Smooths out voltage and current peaks

C027

Central Processing Unit

C035

Memory - CPU program and fault data storage

C045

Actual Value Acquisition - Feedback isolation

C051

Voltage Model - Calculate field flux quantity

C059

Analog Interface - A to D/D to A converter

C067

Spare Analog Interface - Empty for service

C075

Digital Interface - Digital I/O,TCC ID., GTO Monitor

C083

Digital Interface - Digital I/O,TCC ID., GTO Monitor

C091

Control System Monitoring - Create “Total Blocking”

C099

Dummy

C121

±15 VDC Power Supply

C139

+5 VDC Power Supply

C157

Start up Unit - Power Supply verification

E147

Blower Unit - Traction Computer cooling fans

G003

Measuring Amplifier - Empty for normal service

G011

Measuring Amplifier - Empty for normal service

G019

Transient Recorder - Empty for normal service

G027

Transient Recorder - Empty for normal service

G035

Driver GTO - Send GTO pulses to Gate Units

G043

Driver GTO - Send GTO pulses to Gate Units

G051

Vector Calculator - Calculate motor field phase angles

G059

Input/Output Board - Analog & speed fbk.

G067

Input/Output Board - Analog & speed fbk.

G075

Temperature Monitoring Supply/Monitor probes

G083

Dummy

G091

Dummy

G099

Dummy

G119

Dummy

G129

Power Supply Buffer - High frequency filter/buffer

G147

±24 VDC Power Supply

Z2

Traction Computer Power Supply Filter

*Some modules are used in different AC drive applications and reside in different slots in those applications. Therefore, the way to avoid confusion when ordering replacement parts is to use the 6FH.... part number on the module.


POWER SUPPLIES POWER SUPPLY FILTER Z2 Installed in the Traction Computer room is a Power Supply filter. Its purpose is to smooth potentially damaging transients on the 74 VDC supply to the TC. It is located to the left of the SIBAS® rack in the Traction Computer room along with many other Power Supply devices. The filter, pictured in Figure 9F-3, appears on the Siemens print. The device has two sets of inputs and two sets of outputs.

f43665

Figure 9F-3 Z2 Traction Computer Power Supply Filter START-UP UNIT C157 The main responsibilities of the Start-Up unit include protection of the Traction Computer, as well as providing a supply of smooth 74 VDC to the TC blowers and Power Supply boards. On board C157 is an input fuse and a reverse polarity protection facility. The start-up signal comes from the EMD 74 VDC control system. The Start-Up Unit appears in both the EMD and Siemens prints. Refer to Figure 9F-5 and Figure 9F-6.

9F-6


0 When the VPC relay picks up, it provides battery voltage to C157. This signal comes in through connector XF pin 5, but first runs through the TC Power Supply filter. Notice that the filter does not appear on the EMD print. Upon receiving this signal, C157 provides a negative battery voltage via connector XE-7 to the SPR relay coil. (Both SPR and VPC relays are discussed in Module 4 of this text). When SPR interlocks close, battery voltage comes into the supply filter again, but this time it is evaluated between XE-1 & 3. If C157 determines that battery voltage on these pins is either not high enough or not stable enough, the power coming into C157 from the filter via front connector pins z20, 24, 28, & d22, 26, 30 will not be passed on to the rest of the TC.

Figure 9F-4 C157 Faceplate

Figure 9F-5 C157in Siemens print (left) Figure 9F-6 C157in EMD print (right) Also not shown on the EMD print are the connections to the TC blower control module E147. 24 VDC is supplied by C157 to the blower tier of the TC via C157 front connector pins d6 & 14. Feedback from the blower tier to verify that the 3 fans are running, comes into the same connector via pins z8 & d10. SECTION 9F. TRACTION COMPUTER MODULES 9F-7

As seen on the module faceplate, two testpoints are available. -UBATT and +UBATT provide places to measure the battery voltage coming into the module. These testpoints are coming through the filter as well. Nominal voltage across these points is 74 VDC with short time transients between 40 & 100 VDC tolerable.

DC/DC SUPPLY BOARD C121, C139, G147 The three Power Supply boards differ in number and rating of output voltages. As the Traction Computer requires three distinct voltage magnitudes, each module satisfies one of the magnitudes needed by the system. Each board contains its own 6.3 A input fuse to serve as overload protection. The fuse can be found at the back side near the plug. A continuity check initiated by the Start-Up unit C157 prevents the Traction Computer from switching on if any of the supply boards are not installed correctly. This logs a Class A fault in the Traction Computer archives. Each board monitors its own inputs and outputs with regards to voltage. If any input or output voltage exceeds set parameters, the Traction Computer must be reset to clear the board of that fault. A reset is accomplished by cycling the respective Traction computer breaker in the #1 Electrical Cabinet. Cycling the Computer Control breaker for the EM2000 will also accomplish this. The test point labeled as L=Fault, indicates that protection has been triggered. Under normal conditions, the socket should measure +12 VDC with respect to battery negative, while zero volts indicates that protection has triggered on that particular module. This can be measured with respect to the black socket on the C157 Start-Up Unit.

Figure 9F-7 Power Supply faceplate. 9F-8


0 C139 receives battery voltage from C157 and creates a +5 VDC supply. These can be measured at the testpoints provided on the faceplate. UIN shows the battery voltage input while UOUT shows the module output. The output from + to - should be within 0.5% of its rating. In other words, the tolerance is 5±0.025 VDC. Note that since this board creates no negative output, a test point labeled “common” does not exist as depicted in Figure 9F-7. The following table gives indications of normal conditions on the board.

Test Point

Measure

With respect to...

L=Fault

12 VDC

-UOUT

+UIN

battery volts

-UIN

+UOUT

5±0.025 VDC

-UOUT

* Yellow LED should be ON (Power Supply Faceplate)

C121 receives battery voltage from C157 and creates a +15 & - 15 VDC supply. These can be measured at the testpoints provided on the faceplate. UIN shows the battery voltage input while UOUT shows the module output. The output from + to - should be within 5% of its rating. In other words, the tolerance is 15±0.75 VDC. The following table gives indications of normal conditions on the board.

Test Point

Measure

With respect to...

L=Fault

12 VDC

common

+UIN

battery volts

-UIN

+UOUT

15±0.75 VDC

common

-UOUT

-15±0.75 VDC

common

* Yellow LED should be ON (Power Supply Faceplate) G147 receives battery voltage from C157 and creates a +24 & -24 VDC supply. These can be measured at the testpoints provided on the faceplate. UIN shows the battery voltage input while UOUT shows the module output. The output from + to -should be within 0.1% of its rating. In other words, the tolerance is 24±0.024 VDC. The following table gives indications of normal conditions on the board.

Test Point

Measure

With respect to...

L=Fault

12 VDC

common

+UIN

battery volts

-UIN

+UOUT

24±0.024 VDC

common

-UOUT

24±0.024 VDC

common

* Yellow LED should be ON (Power Supply Faceplate) SECTION 9F. TRACTION COMPUTER MODULES 9F-9

STANDBY POWER SUPPLY G129 This board buffers the secondary supply voltages of 5, ±15, & ±24 VDC to the TC (74 VDC being the primary supply). The board is a fairly rudimentary device consisting essentially of several electrolytic capacitors. These elements serve to store energy so that the TC does not shut down if power is lost momentarily. In addition to providing momentary power backup, G129 also provides a filter for any high frequency transients that may have passed the power supplies.

BLOWER (FAN) UNIT E147

Figure 9F-8 Blower (Fan) Unit E147 As mentioned earlier, the TC is installed in a closed metal housing. Natural convection in such an application does not provide adequate cooling air to the modules, therefore a set of fans has been installed between the racks that hold the modules. This fan tier, pictured above, contains 3 blowers each driven by its own 24 VDC motor. Each motor is protected from overload by a 0.4 A microfuse, and monitored constantly for operation. In the event of a fan failure, the red LED V4 on the faceplate of the tier illuminates, and a relay is energized to signal the condition to the TC. The 24 VDC supply for the motors comes from the C157 module. Fuses for each of the motors are accessible from the front of the blower tier. They are labeled F1, F2, & F3.

INPUTS AND OUTPUTS TEMPERATURE MONITORING G075 This board can handle up to 8 temperature feedback signals. Each channel provides a constant 2 mA signal to a temperature sensitive resistor. The voltage drop across this thermo-resistor to which the current is applied is measured by the board. The feedback signal is available at the output of the board as a voltage signal variable between + & - 10 VDC. The 8 temperatures coming to the module are multiplexed for output. In other words, the Traction Computer scans through all 8 signals continuously by watching only one feedback line. The variable voltage signal passes on to the Vector Calculator G051, then to the Analog Interface C059.

9F-10


0

Figure 9F-9 shows the Siemens print. The F101/F201 temperature probe has four leads coming to it from G075. The wires labeled + & - 5 VDC are actually supplying the current source, while the + & - M leads measure the voltage drop across the element.

F43699

Figure 9F-9 G075 Temperature Monitoring

INPUT/OUTPUT BOARD G059, G067 This PCB handles all analog feedback signals (except temperatures), such as DC Link Voltage input and phase current input as well as digital pulse inputs from traction motor speed pick-ups. These signals are scaled and filtered before being passed on to the various modules as defined by the 11 X 17 fold out sheet on page 9F-4. The board appears on the Siemens print.


This board also serves as the termination point of the plug loop control. The TC has a way of monitoring whether or not all of the plugs, Xa..Xm, are intact. A 24 VDC positive feed is taken off of the TC supply line (signal PL2). This feed runs to pin 24 on the 1XC connector which is jumpered to pin 24 of Xa. Pin 24 of Xa connects to pin 23 of Xb which is jumpered to pin 23 of 1XC. This process continues through all of the X connectors until eventually the +24 VDC arrives at board G067 on front connector pin b26. If a complete path to negative on pin d28 is not seen by G067, then the TC is disabled. This condition logs a Class A or B inverter fault and causes the soft crowbar to be fired for TCC protection.

Figure 9F-10 G059, G067 Input/Output Board ACTUAL VALUE ACQUISITION C043 This module receives data from the Input/Output Boards G059 & G067. Most data gets passed on from here to the Analog Interface C059 and the Control Systems Monitoring C091. Some of the data is passed on to the Voltage Model C051 and the Vector Calculator G051. The main purpose of this module is to act as an isolation buffer to protect the rest of the TC from potentially harmful spikes that may occur on feedback lines. Note that not all signals being fed back into the TC come to this module for conditioning, as other modules such as Vector Calculator G051 & Voltage Model C051 have their own conditioning facilities.

ANALOG INTERFACE C059 The analog interface can be closely compared to the function of the ADA 302/304 module of the EM2000 control system. Its main purpose is to convert analog signals into digital equivalents that can be understood by the Central Computer C027. Also, this board has the capacity to change a digital signal back into a close approximation of its analog equivalent for driving external devices such as a tractive effort meter.

9F-12


0 Conversion facilities are available for eight voltages of ±15 VDC and eight voltages of ±10 VDC. Resolution of the 15 volt inputs is 1365 bits/10 VDC; 10 volt channels are resolved on a scale of 2048 digits/10 VDC. Output channel resolution, to drive a meter, for example, is 127 bits/10 VDC with a possible range of ±10 VDC.Also, this board carries a thermally sensitive resistor. This resistor is used to measure the temperature of the Traction Computer. The feedback signal from this device is in no way affiliated with the other temperature feedbacks handled by Temperature Monitoring G075.

DIGITAL INTERFACE C075, C083 The Digital Interface is really more like a “miscellaneous functions” board. The primary function, as the name implies, is to prepare binary feedback for the data bus. With the GT46MAC locomotives, heater and blower control falls under the duties of the EM2000. Other functions of this board include TCC identification, fault code indication, and residence for commissioning switches. All speed sensor feedbacks come into the modules from the Input/Output modules. Each board has the capacity to handle only two frequency inputs such as those coming from the speed pick-ups, but a total of three probes need attention. For this reason, two boards must be used. Board #G059 & C075 handles the speed signals from motor #1 & #2; board G067 & C083 accommodates the needs of TM #3. Also handled by the Digital Interface is the GTO firing sequence feedback which comes to the modules from the Control Set Converter C011. These signals get passed back to the Control Systems Monitoring C091 for evaluation.


F43698

Figure 9F-11 C075, C083 Boards The faceplate of the module has two 7-segment LED displays. These units illuminate whenever the TC operates to indicate any active fault. The normal reading on these displays is FF, which stands for Fault Free. All inverter faults are stored in the TC fault archives on its Memory board C035. These indicators tell the latest fault to be stored in the archives, but only if the fault is still active. If the fault is cleared, the indication remains on the display segments until either a new fault occurs, or a new operating mode is selected.

9F-14


0 For example, assume the Traction Computer detects that a GTO could not be switched off for some reason. The fault logged would be, “GTO STORAGE TIME EXCEEDED.” Some hexadecimal code (such as D8, 1A, or BF) would appear on the LEDs to indicate that this fault had occurred. The specific code indicating each particular fault will not likely change with each software revision, however additional codes may be added to make troubleshooting more easy and efficient. When investigating the fault archive data stored in the TC by using a lap-top computer, the fault description as well as its specific code, may be viewed as well as all operating data recorded at the time of the fault. The hexadecimal code as seen on the LED indicators should match that listed along with the fault data and description when read by a laptop computer. Investigation and interpretation of inverter fault data is discussed in Section 12. Again, if no fault is active, the indicators will show FF to indicate Fault Free. A table of these codes will be provided in Section 12 which discusses use of the laptop computer as an aid for troubleshooting. The number wheels on the front of the module should be used by manufacturer service personnel only. During commissioning of the system, the switches are set to 02, but in regular service, they should be set to 00. Eventually, a software override will be built in that will ignore the switch settings. At the bottom of the faceplate appear four LEDs. These indicate the activation of a variety of internal processes. Figure 9F-11 on the previous page explains the meaning of each of these LEDs.

DRIVER GTO G035, G043 These modules take the 15 VDC pulses sent from the Control Set Converter C011 and convert them to 24 VDC/100 mA current signals that can be used by the Gate Units. The module also contains feedback channels used for Gate Unit monitoring signals. Each module contains the facilities necessary for controlling four gates. Because a total of three Gate Units (six gates) need controlling, two modules must be used. The G043 board controls phase T and the protection thyristors, while G035 controls phases R & S. As mentioned above, in addition to driving the GTO thyristors, board G043 also carries the signals sent out by the TC to fire the protection thyristors. The TC can trigger both the hard and soft crowbars. The Driver GTO board (G043) passes a signal on to the proper TCB (Thyristor Control Board) depending on hard or soft crowbar. The Driver GTO board also carries the feedback signals from the TCB'S into the TC that acknowledge the firing of either protection thyristor. These signals originate at either T103/T203 or T104/T204.


SYSTEM CONTROLS SERIAL LINK C003 Data exchange between the EM2000 and each Traction Computer takes place continually over a serial communications link called the RS-485. In order to facilitate this, the EM2000 implements a module called COM300. At the other end of the Link, the Traction Computer employs a very similar design in that the Serial Link C003 preforms this duty. To carry out its tasks, the module uses a 80188 microprocessor running at 8 MHz, 2 Manchester encoder/decoders, and Dual Port RAM. On board EPROM chips store the program for running the processor. Once received and decoded, data from the RS485 is placed on the Traction Computer data bus. Outgoing information is taken from the bus, encoded, and placed on the Link. Exchange of data with the Link is through the upper front connector which is a 9 pin serial port. The lower port is not used. The yellow LED on the faceplate should be illuminated during normal operation. The light goes out when the system is in the midst of a reset.

Figure 9F-12 Serial Link C003 Two testpoints are available on the faceplate of the module, but in this particular application they serve no practical purpose.

CENTRAL COMPUTER C027 The CPU module contains the microprocessor that exercises control over the entire TC. Many of the system control modules contain microprocessors for various purposes. This module, though, contains the main processor. It is in a sense the "conductor of the orchestra." All functions of TC are "supervised" by the Central Computer. The board uses an 80186 microprocessor clocked at 8 MHz. The program used by the processor is stored in EPROM chips, but unlike the EM2000 CPU module, the chips are not on board the Central Computer module. Rather, the chips are on the Memory board C035. The Central Computer has a safety shut-down mechanism; if a portion of the CPU program is not completed within a certain time period, the inverter will be shut down. It may be reset simply by rebooting the TC. Reboot can be done by cycling the Traction Computer breaker or the EM2000 computer breaker, both of which are found in the #1 Electrical Cabinet.

9F-16


0

MEMORY C035 The Memory module contains all of the EPROM chips required for storing the Central Computer’s program as well as all of the chips that make up the system’s RAM (Random Access Memory). The RAM on board is backed up by local 5 VDC batteries, much the same way that data is backed up on the EM2000’s MEM300 module. One portion of RAM is dedicated to storing any values which change during TCC operation, for example, wheel diameter. Information contained in this portion is initialized each time the system boots. A second portion serves as a fault storage buffer. This portion of RAM retains its data until a reset command is given by service personnel, the batteries lose charge, or the chips become defective. In other words, fault data is not lost when the system reboots. Life expectancy on the batteries is approximately 3 years. Just as the EM2000 system does, the Traction Computer will log a fault when its memory battery voltage falls too low. As with the Serial Link module C003, two test points are available on the faceplate of the module, but in this particular application they serve no practical purpose.

Figure 9F-13 C035 Memory VOLTAGE MODEL C051 Obviously, the AC traction system uses AC traction motors. More specifically, they are AC induction motors. The induction part means that there are no electrical connections to the rotor of the motor. “Commutation” of electrical energy to the rotor actually takes place by electromagnetic induction. To accomplish this “commutation,” an intense magnetic field which generates hefty amounts of magnetic flux must be established in the stator. The amount of energy carried across the air gap between the rotor and the stator depends on the amount of flux present, among other things. In the very early development days of AC traction drives in Europe, attempts were made to measure flux by using flux sensitive resistors. Unfortunately, these resistors do not operate well under high heat, vibration, moisture, or dirt contamination. Due to the obvious incompatibility with locomotives, a different method for determining flux was needed. This motivated Siemens to develop their patented method for calculating the flux present in the motor. Flux is directly proportional to voltage, therefore the flux can be easily calculated from a voltage measurement while knowing the phase displacement between voltage and current in the motor. This board is dedicated to making these flux calculations with the assistance of the Vector Calculator, (board G051), which determines phase shifts between voltage and current. G051 is discussed next.


The C051 module receives the feedbacks on output phase-to-phase voltage and output phase currents from the Input/Output G067 module. The problem with this signal is that it varies constantly between the positive and negative extremes (remember that it’s an AC voltage). The Voltage Model module takes this AC signal and calculates a DC equivalent. In making this calculation, the module takes into consideration machine losses, (ohmic resistance & leakage reactance), as well as phase relationships which come from the Vector Calculator G051. Information from the Voltage Model is placed on the data bus for use by the Central Computer and also sent directly to the Analog Interface.

VECTOR CALCULATOR G051 The AC induction traction motor creates a rotating field in its stator for the purpose of inducing current flow in the rotor. As with any rotating field machine, the rotating field may be explained using vector quantities. These vectors are needed to define the phase relationship of voltages and currents in the motor. Remember that when dealing with AC power, the phase angle of voltages and currents are just as important as their magnitudes. The function of the Vector Calculator is to develop values which represent these phase angles and how they change in a rotating coordinate system. The module is primarily designed to determine steady state static quantities from vector quantities in a cyclic coordinate system. The Vector Calculator uses voltage and current feedback data from the Input/Output modules G059 & G067 in its calculations. The output of the module is sent to the Analog Interface and also to the Voltage Model module.

Figure 9F-14 G051 Vector Calculator A series of testpoints are accessible on the module faceplate. Many of the signals available on the faceplate are generated by the module based on inputs from feedbacks. These test sockets should have no purpose for maintenance personnel. For the sake of identification though, some of the meaningful ones are described here.

WARNING The test sockets are not decoupled from the module’s internal circuitry. Probing of the test points could lead to interference in signal processing which may affect control of the inverter.

9F-18


0

SOCKET

SIGNAL

L1

Flux component ß. Amplitude & frequency depend on RPM, TH, & DCL V.

L2

Flux component a. Socket L1 shifted 90°. Amplitude & frequency depend on RPM, TH, & DCLV

P1

Magnetizing current. DC with AC component wave form. Positive in power and in brake

P2

Real current. DC with AC component waveform. Positive in power, negative in brake.

T2

Flux. DC signal, always negative.

NOTE Measure with respect to common on 15VDC Power Supply board C121.

CONTROL SET CONVERTER C011 The Control Set Converter, sometimes referred to as the subprocessor, holds the data that tells exactly how the GTOs should fire for different torque requests. Control set tables stored permanently in EPROM chips mounted on the module carry this information. Firing pulse data is sent from the module to the Driver GTO boards. The module receives its data from the data bus and the Control Systems Monitoring C091 module. The module consists of an 80C196 processor which communicates with the Central Processor C027 via Dual Port RAM. The LED on the faceplate should be on during normal operation. It turns off when the system is in the process of a reboot.

Figure 9F-15 C011 Control Set Converter


CONTROL SYSTEMS MONITORING C091 The Control Systems Monitoring board acts as an inverter regulator. If an overcurrent or overvoltage condition exists somewhere in the TCC, the Control Systems Monitoring board can initiate “Total Blocking” in an attempt to eliminate the condition. Total Blocking is an action activated by the Control Systems Monitoring module by which one, two, or all three phases are shut down. The shut down may only last a few milliseconds or it may last indefinitely, depending on how quickly the condition that tripped Total Blocking disappears. This action is tripped by software and can only be reset automatically by software if conditions allow, or it may be reset by rebooting the computer. Control Systems Monitoring receives data from several sources. These sources can be easily seen in the information flow diagram found on the fold out page on page 9F-4. It monitors feedbacks such as temperatures, voltages, currents, and GTO firing pulses. If any of these values exceeds a preset software limit, Total Blocking is activated.

SERVICE/DEVELOPMENT & TROUBLESHOOTING The chassis is wired to accept a few modules that may be used by manufacturer service personnel for intensive troubleshooting purposes. These modules are not installed in the chassis during regular service, but may be from time to time for special troubleshooting or development purposes.

TRANSIENTS RECORDER G019 & G027 Each recorder acts as an extension of the fault archive capabilities. For example, if a unit experiences erratic loading troubles but the reported trouble cannot be reproduced in a shop environment, one or both recorders may be installed to constantly monitor a variety of data. Each recorder performs similarly to the event recorder installed in each locomotive by FRA mandate. Each recorder can monitor up to 10 analog and 32 binary signals. Of the 32 binary signals, 16 can be of the TTL level, while the remaining 16 may be as high as 40 VDC. The shortest sample time is 2.8 microseconds (0.0000028 seconds). Memory capacity is 47k per channel and it can be divided into 8 separate partitions for repeated recording. A PC is required to access the data stored by each recorder.

MEASURING AMPLIFIER G003 & G011 The amplifiers provide access to a number of signals via front connector test points. A total of 24 analog and 4 binary signals can be passed through each module. Of the analog signals, 8 may be on the ±30 VDC scale while the remaining 16 must be on the ±10 VDC scale.

9F-20


0

SPARE ANALOG INTERFACE C067 When commissioning the TCC for its maiden voyage, the installation representative uses an extra Analog Interface board to allow for driving several external devices. This board may also be used for extended troubleshooting in a shop environment or regular service.


9F-22


0

SECTION 9G. OPERATIONAL CONTROL MODES Once a unit is started, an operator request through movement of one of the operating levers: •

Reverser,

•

Throttle,

•

Brake Handles,

combined with the appropriate feedbacks, initiates an “OPERATING MODE.” This section will describe the operational control modes the locomotive could be operating in.

OP MODE DETERMINATION The op mode of the locomotive defines its basic state of operation. The op mode transitions from one state to another by fulfilling or negating a list of conditions required for each state. The conditions are generally a combination of operator inputs and locomotive system feedbacks. The “Working on Modes” indicate the operator has requested a mode but the locomotive is not ready to load yet. “Propulsion Modes” are defined as modes that lead to the creation of traction motor torque. The following state transition diagram details the op mode sequencing in the propulsion modes:

OPERATIONAL CONTROL MODES 9G-1

F43656

Figure 9G-1 Detailed Propulsion Op Mode Sequencing.

STANDARD OP MODES (AC Only) A description is given for each traction op mode. The display names are given to the right.

9G-2


0

Standard Operating Modes (AC only) Op Mode

Display Name

Idle

IDLE

Traction Change

TRCH

Propulsion Requested

PRPRQ

Working on Propulsion

WPRP

Propulsion

PROP

Working on Powering

WPWR

Power

PWR

Rollback

ROLL

Speed Control Power

SSPW

Working on Electric Brake

WEB

Dynamic Brake

DBRK

Blended Brake

BBRK

Emergency Brake

EBRK

Opposite Direction Brake

ODB

IDLE MODE (Display Name = IDLE) Idle Mode is basically the mode that the locomotive is in when the reverser is centered, no self tests are active and a TCC cut in/cutout is not in progress. This mode acts as a starting point for all other modes.

TRACTION CHANGE (Display Name = TRCH) The Traction Change mode is entered when TCCs are being cut in or cutout.

PROPULSION REQUESTED (Display Name = PRPRQ) Propulsion Requested is the first step toward all the propulsion modes. It basically indicates that the operator has thrown the reverser and possibly desires to load. The only basic condition required is that the reverser is thrown. The control circuit breaker must be on because the reverse handle inputs may not be valid with the circuit breaker down. When these conditions are not met the op mode will transition to Idle Mode.

WORKING ON PROPULSION (Display Name = WPRP) Working on Propulsion mode makes sure that locomotive can produce voltage on the DC link(s) in preparation of powering or braking operation. Things such as having the isolation switch in RUN, and the DC link switchgear closed, are required to enter this mode. When all of these conditions are met, GFC can be picked up. OPERATIONAL CONTROL MODES 9G-3

PROPULSION (Display Name = PROP) Propulsion mode is the next step in setting up for actual power or braking operation. In this mode the locomotive must be capable of producing voltage on the DC link(s). In this mode, the traction alternator voltage is controlled to a minimum value so that the system can create traction motor torque when requested by the operator. Having DC link voltage present in Propulsion mode mini

WORKING ON POWERING (Display Name = WPWR) The Working on Powering mode means that the operator has requested powering operation and the locomotive is in the process of setting up to produce torque. To get to this mode, no serious faults can be active, as would be shown on the display.

POWER (Display Name = PWR) The Power mode means that the operator has requested power operation and the locomotive is ready to create traction motor torque. The base loading level is adjusted by the operator with the throttle handle. At least one traction inverter must be able to load, in order for this mode to be entered.

ROLLBACK (Display Name = ROLL) The Rollback mode means that the operator has requested power operation and the locomotive is ready to create traction motor torque but it is or was rolling in the opposite direction of the reverser handle. The base loading level is adjusted by the operator with the throttle handle. At least one traction inverter must be able to load, in order for this mode to be entered. The Rollback mode is not available on the GT46MAC locomotives.

SPEED CONTROL POWER (Display Name = SSPW) The Speed Control Power mode means that the operator has requested speed control power operation and the locomotive is ready to create traction motor torque. In speed control power the loading level is defined by the TL 24T voltage. TL 24T is adjusted by the lead unit in the consist to control to the speed entered by the operator. At least one traction inverter must be able to load, in order for this mode to be entered. The speed control power mode is not available on GT46MAC locomotives.

WORKING ON ELECTRIC BRAKE (Display Name = WEB) The Working on Electric Brake mode means that the operator has requested dynamic brake operation and the locomotive is in the process of setting up to produce torque. To get to this mode, no serious faults can be active, as would be shown on the display.

9G-4


0

DYNAMIC BRAKE (Display Name = DBRK) The Dynamic Brake mode means that the operator has requested dynamic brake operation and the locomotive is ready to create traction motor torque. In dynamic brake operation the amount of brake effort is controlled by the dynamic brake handle position via the TL 24T input voltage. At least one traction inverter must be able to load, in order for this mode to be entered.

BLENDED BRAKE (Display Name = BBRK) The Blended Brake mode means that the operator has requested blended brake operation and the locomotive is ready to create traction motor torque. In blended brake operation the amount of total brake effort is controlled by the automatic air handle position. This mode exists on passenger locomotives only. The blended brake mode is not available on GT46MAC locomotives

EMERGENCY BRAKE (Display Name = EBRK) The Emergency Brake mode means that the operator has requested emergency brake operation and the locomotive is ready to create traction motor torque. This mode exists on passenger locomotives only. The emergency brake mode is not available on GT46MAC locomotives

OPPOSITE DIRECTION BRAKE (Display Name = ODB) The Opposite Direction Brake mode means that the locomotive conditions are such that opposite direction brake is requested and the locomotive is ready to create traction motor torque. The dynamic brake effort is controlled as if the operator requested full dynamic brake using the brake handle. Some protective functions may become less sensitive or deactivated in this op mode given its significance. At least one traction inverter must be able to load, in order for this mode to be entered.

CONTROL MODES Since load control involves several references and any of them might be the controlling limit for the locomotive, mode signals are introduced to indicate the particular control limit that is in effect. The control modes are intended to be used for display and diagnostic purposes, not for use in the actual control processes. All locomotives have two basic signals; MG Stat and RegStat. MG Stat indicates the detailed control mode for the traction alternator. In addition, a sanitized version of this mode is provided for display on standard data


MG AND REG STATUS

9G-6

REGSTAT

MG STAT

DESCRIPTION

REFERENCE

NONE

MGOP or NONE

NO REGULATION

GFC OPEN

FCUP

FCUP

FLD CURRENT REG UPPER BOUND

FCLW

FCLW

FLD CURRENT LOWER BOUND

FVUP

FLD VOLTAGE REG UPPER BOUND

FVLW

FLD VOLTAGE REG LOWER BOUND

MAX

SCR’S COMPLETELY TURNED ON

OFF

SCR’S TURNED OFF

GX

GX

FIL CURRENT (GEN. EXCITATION)

GX

GFA

GFA GEN FIELD CURRENT LIMIT

SS

SS

SUPER SERIES

V

V

VOLTAGE

VOLTAGE MODE

V

V PR or PRV

PROTECTIVE VOLT LIMIT

VOLT REF

V

MAXV

MAX VOLTAGE LIMIT

V

TCCV

TCC VOLTAGE

V

GRID

GRID DROP OUT VOLTAGE

V

REDV

DC LINK VOLTAGE REDUCTION

V

HEPV

STANDBY HEP VOLTAGE LIMIT

V GR

GROUND RELAY VOLTAGE LIMIT

VSP

SLIPPED PINION VOLTAGE LIMIT

KW

PWR

POWER

POWER MODE

KW

TB or TBP

TURBOCHARGER SPEED LIMIT

POWER REF

KW

LR

LOAD REG LIMIT

POWER REF

KW

SSCP OR SCP

SLOW SPEED CONTROL

POWR REF

KW

WSP

WHEEL SLIP

POWER REF

KW

TRAN or TRNP

TRANSITION POWER LIMIT

POWER REF

KW

MCOP

MOTOR C/O POWER LIMIT

POWER REF

KW

THLM or PRP

PROTECTIVE POWER LIMIT

POWER REF

TKN

THROTTLE KNOCK DOWN

PWRL

POWER LIMITING

KW

LTL or LTP

LOAD TEST LIMIT (GRID PWR LMT)

POWER REF

KW

BC or BCP

BAROMETRIC COMPENSATION

POWER REF

KW

MTS

MTS POWER LIMIT

POWER REF

KW

ERPMorRPMP

ENGINE RPM POWER LIMIT

POWER REF

KW

HEP or HEPP

HEAD END POWER LIMITING

POWER REF

KW

MAXP

MAX ENGINE POWER

KW

ETEP

ENG TEMP ENG POWER LIMIT

KW

ETGP

ENG TEMP GRID POWER LIMIT

KW

GCGP

GRID COOLING POWER LIMIT

KW

EOLP

ENG OVERLOAD POWER LIMIT

KW

ETRK

ENGINE TRACKING POWER LIMIT


0 KW

EMDC

EMDEC ENGINE POWER LIMIT

KW

TRAC

RATED TRACTION POWER DESIRED

KW

RPMP

ENGINE SPEED POWER LIMIT

MFA

MFA

MIN GEN FIELD CURRENT LIMIT

A

GA

GEN CURRENT THROTTLE REF

A

MA

MTR CURRENT THROTTLE REF

A

A

CURRENT

CURRENT MODE

A

WSA

WHEEL SLIP

CURRENT REF

A

SSCA OR SCA

SLOW SPEED CONTROL

CURRENT REF

A

MMA

MOTOR MGT CURRENT L

CURRENT REF

A

MCOA

MOTOR C/O LIMIT

CURRENT REF

A

TBCA OR TMBA

TRACTION BLWR CURRENT LIMIT

CURRENT REF

A

VWS

VENDOR WHEEL SLIDE CURRENT LIMIT

F

F

T.M. FLD CURRENT LIMIT

D.B.

F

WSFC

WHL SLIP TMFLD CURRENT LIMIT

D.B.

F

FCCB

TM FLD CURRENT CNTRL BOUND

D.B.

G

G

GRID CURRENT LIMIT

D.B.

G

TBGC or TMBG

TRAC. BLWR GRID CURRENT LIMIT

D.B.

G

GCCB

GRID CURRENT CNTRLR BOUND

D.B.

BE

BE

BRAKE EFFORT LIMIT

D.B.

BE

BECB

BRAKE EFFORT CNTRLR BOUND

D.B.

WHEEL SLIP STATUS VARIABLE The wheel slip status variable, which has a display name of, “WS Stat”, indicates what mode the locomotive adhesion system is operating in. There are four general modes for both AC and DC locomotives, and one additional mode for DC locomotives. These modes are listed in the table below, along with their display or monitor name and a description

SIGNAL AVAILABILITY Since the adhesion system modes are simpler on AC locomotives than on DC locomotives, this variable is not available on AC locomotives through the display, or EM2000 monitor.

Definition Table Wheel Slip Status

Description

Display Name

Idle Mode

This mode is active when the locomotive is not in a loading mode, i.e. Idle

IDLE

Starting System

This mode is active at low speeds, when there is not a reliable output from the radar. The radar typically active above 1 MPH. The starting system will normally be active up to 1.5 MPH, and it may be active up to 3 MPH, under high adhesion conditions.

STSS


Controlled Creep Mode

This is the creep mode known by most as “Super Series”. This mode is more formally known as Controlled Creep on AC locomotives. In this mode the Radar is used as a ground speed reference, and the traction motor wheel speed reference is controlled to allow the desired level of creep. The speed reference (TxN+dN) is sent to the traction inverters and the inverters reduce the torque output of the traction motors if the speed reference is exceeded.

SS

Backup System

The traction inverters monitor the wheel speeds, primarily looking for high accelerations, and reduce the motortorque accordingly. The operation in the backup system is most obviously indicated by the “N + dN” signals being at 3600

CS

TR AND TC STATUS AC locomotives have an additional set of modes since the inverter system introduces extra degrees of freedom. TC Stati indicates the detailed control mode for traction inverter i. A sanitized version of this mode is provided for display on standard data meters. This signal, Tr Stati, has fewer, broader categories, so that it will convey useful information to the casual observer. More detailed information can be obtained by viewing the TC Stati signal on a programmable meter screen.

9G-8


0

Traction Inverter Control Modes Tr Stat

TC Stat

DESCRIPTION

KW

MAX9

MAX ENG POWER

KW

ETEP

ENG TEMP ENG POWER LIMIT

KW

ETGP

ENG TEMP GRID POWER LIMIT

KW

PRP

PROTECTIVE POWER LIMIT

POWER REF

KW

BCP

BAROMETRIC COMPENSATION

POWER REF

KW

PWR

POWER

POWER MODE

KW

TBP

TURBOCHARGER SPEED LIMIT

POWER REF

KW

SCP

SLOW SPEED CONTROL

POWER REF

KW

LTP

LOAD TEST LIMIT (GRID PWR LMT)

POWER REF

KW

HEPP

HEAD END POWER LIMITING

POWER REF

KW

TCCP

MAC TCC POWER

KW

GCGP

GRID COOLING POWER LIMIT

KW

ETRK

ENGINE TRACKING POWER LIMIT

KW

EMDC

EMDEC ENGINE POWER LIMIT

KW

RPMP

ENGINE SPEED POWER LIMIT

KW

EOLP

ENG OVERLOAD POWER LIMIT

KW

TRAC

RATED TRACTION POWER DESIRED

T

ST

STALL TORQUE

T

BAT

BACKUP ADHESION TORQUE LIMIT

T

SCT

LOCOMOTIVE SPEED TORQUE LIMIT

T

PRT

PROTECTION TORQUE LIMIT

T

MAXT

MAX INVERTER TORQUE

T

TEL

TRACTIVE EFFORT LIMITING TORQUE LIMIT

T

VWS

VENDOR WHEEL SLIDE TORRQUE LIMIT

SCR SATURATION MG Stat has one additional feature. The values representing SCR bridge saturation, MAX and OFF, are included. Specifically, MG Stat is formed using the mode exciting of the SCR linearization process. If the scr delay ratio drops below 15 percent, the MG Stat is MAX since all the SCRs are turned on to their maximum value. If the scr delay ratio exceeds 99 percent, the MG Stat is OFF since the SCR's are turned off.

SCRD% The FCF module detects when the sine wave for each companion alternator phase crosses from the negative half cycle into the positive half cycle. When the "0" line is crossed FCF informs the CPU module. Based on this signal the CPU counts the amount of time necessary to generate a weak gate signal/pulse at the proper phase angle for a given load request. This signal is sent to the FCD for amplification before sending it to the SCR assembly.


F43657

Figure 9G-2 Creep Curve of SCRD Percentage.

The delay percentage is a number representing the amount of time the companion alternator phase is in the positive half cycle before the SCR is turned on. Therefore if SCRD% is "15%" the SCR is turned on early in the cycle for maximum excitation.

LISTING OF MODES Following is a table of all the possible control modes. The left-hand columns give the values that the four modes take for each limit. The right-hand column gives a description of the mode. An asterisk, (*), indicates that the limit does not apply to a status. For example, all power limits can effect both the generator output, (hence Reg Stat and MG Stat), and the traction inverter torque reference, (hence Tr Stat and TC Stat). But voltage limits only affect the generator, and torque limits only effect the traction inverters. Therefore an asterisk is shown in the Tr Stat and TC Stat columns where voltage limits are considered, and in the Reg Stat and MG Stat columns where torque limits are considered.

DECODING The modes are determined by a string of status signals that are passed through the entire load control, dynamic braking and traction alternator control systems. Whenever a decision to use a reference is made, a status is set to identify the reference used. The status signals are daisy chained throughout the system until the final outputs are determined. Rate limiters and attenuaters do not change the status information of a signal passing through them.

9G-10


0

Reg Stat

MG Stat

TR Stat

TC Stat

Description

*

MAX

*

*

SCR’s completely turned on

*

OFF

*

*

SCR’s turned off

KW

EMDC

KW

EMDC

EMDC engine power limit - Power limit sent by EMDEC on locomotives with tow way serial link

KW

RPMP NORMAL

KW

RPMP

Engine speed power limit - Power limit based on the speed of the engine

KW

ETEP

KW

ETEP

Engine temperature power limit - Power limit from the engine Overheat Controller. This power limit attempts to limit the engine temperature, to avoid engine overheating.

KW

PRP

KW

PRP

Protective power limit - Power limit based on protectiv functions such as throttle 6 hot engine knockdown.

KW

BCP

KW

BCP

Barometric compensation power limit - Power limit based on the barometric pressure, used to indirectly limit turbo speed in throttles less than 5, or all throttles if the turbo speed is failed.

KW

TRAC

KW

TRAC

Rated traction power desired @ Power reference defining the desired level of tradon power, eg. 2828 KW in throttle 8, for a 4000 THP locomotive.

KW

TBP

KW

TBP

Turbocharger speed power limit - Power limit from the turbo speed controller, which is normally active in throttles 5 through 8, if the turbo speed signal is valid.

KW

EOLP

KW

EOLP

Engine overload power limit - Power limit from the Engine Overload Controller, Whose output is base on the value of the load regulator output, LR, or Engine 8 from FMDEC.

KW

LTP

KW

LTP

Load test power limit - Power limit based on grid load balance concerns. This limit does not apply to SD70MAC locomotives but does apply to SD80/90MAC locomotives.

KW

GCGP

KW

GCGP

Grid cooling grid power limit - Power limit based on grid loading concerns. This limit does not apply to SD70MAC locomotives, but does apply to SD80/90MAC locomotives.

KW

ETRK AFTER DROP OF LOAD

KW

ETRK

Engine tracking power limit - Power limit based on the present engine power output. This power limit tracks above the engine output power, and controls engine reloads.

GX

GX

*

*

Generator field current limit - Maximum allowed Main Generator field current limit.

MFA

MFA

*

*

Minimum generator field current - Minimum Main Generator field current. This is used to maintain a minimum level of excitation in the Main Generator

NONE

NONE

V

PRV

V

MAXV

V

TCCV

Not controlling, GFQ Open *

*

Protective voltage limit - Voltage limit imposed by the control system's protection system. Maximum voltage limit -The maximum allowed voltage limit, based on Main Generator Model. For the TA1 7 and TA22 Generators a value of 2900 Volts is used.

*

*

TCC voltage limit - The DC link voltage reference developed to satisfy the TCC's, based on the throttle handle, and locomotive speed.


V

GRID

Grid dropout voltage limit - Voltage limit used to lower the DC link voltage if necessary, in order to allow a brake grid to be dropped out. This is used for Rollback mode on SD80/ 90MACs.(Not applicable on GT46MACs)

V

REDV

*

*

DC link voltage reduction - Voltage limit utilized on SD80/90 MACs to lower the DC link voltage to 2450 Volts, when requested by a TCC. A TCC will not turn on above this level

*

TCC

T

ST

Stall torque limit - Thrque limit based on the published tractive effort limits for each throttle.

*

TCC

T

BAT

Backup adhesion torque limit - Stall torque limit utililized when the radar is failed. Throttles 1 through 4 are not affected, while the throttle 5 through 8 limits are reduced by about 25%.

*

TCCV

T

SCT

Locomotive speed torque limit - Torque limit from the speed control svstem.

*

TCCV

T

PRT

Protection torque limit - Torque limit based on protection limits. Used on SD80/90MAC locomotives for torque limiting based on hot traction motor. Not abailable on GT46MAC.

*

TCCV

T

MAXT

Maximum inverter torque - An absolute maximum inverter torque limit. The torque refererence should never reach this level under normal conditions.

FUNDAMENTAL SIGNAL VALUES FOR 3939 THP, GT46MAC ENGINE SPEED: For each “governor” position, given by the signal “Gov Req”, the following table shows the associated engine speed. Note that the engine speed may not always match that shown, on a per throttle handle basis, since there may be an engine speed-up, or limit, active.

Low Idle

Idle

1

2

3

4

5

6

7

8

200

269

269

343

490

568

651

729

820

904

±4

±4

±15

±4

±15

±4

±4

±15

±4

GOV, 16-710

POWER: For each throttle position, the following table shows the maximum traction power that can be produced. If the speed is high enough so that the locomotive is not limited by the stall torque limit, a healthy locomotive should produce power levels as shown in this table. The display signal which corresponds to the power reference is , “KW Ref”, and the power being produced is, “KW Fbk”. These values apply for both Power and Load Test modes.

9G-12


0

Throttle Power

Throttle Power Limit (W)

IDLE

0

1

133, 000

2

294,000

3

665, 000

4

945, 000

5

1, 253, 000

6 - turbo on gear train

1, 550, 0000

6 - turbo off gear train

1, 820, 000

7

2, 400, 000

8

2, 757, 000

TORQUE AND TE (Tractive Effort): For each throttle position, the following table shows the stall torque limit, “Locomotive Torque Limit”, and how much tractive effort this corresponds to, for wheels at various levels of wear. The, “Backup Torque Limit”, is the maximum torque produced in the, “Backup”, wheel slip mode, where the radar is failed. The display signals corresponding to the inverter torque references are, “T1Tor R”, and “T2Tor R”, for trucks 1 and 2 respectively. The feedback signals are , “T1Tor F”, and “T2Tor F”. Since these are per truck signals, they would be roughly half of the magnitude of those shown in the table. The tractive effort will only match these values at low speeds, (say below about 8 MPH), before the power limit becomes dominant.

These values are Siemens specs, therefore they are in metric.

AC Traction - Rated 3939THP Throttle Position

Locomotive Torque Limit (Nm)

Equivalent Stall TE (lbs) for the following wheel sizes (in inches)

Backup Torque Limit (Nm)

43

41.5

40

0

0

0

0

0

1

5, 041

10, 849

11, 241

11, 663

5, 041

2

10, 082

21, 698

22, 482

23, 326

10, 082

3

17, 643

37, 971

39, 343

40, 819

17, 643

4

25, 205

54, 245

56, 206

58, 314,

25, 205

5

32, 766

70, 518

73, 067

75, 807

26, 200

6

40, 327

86, 791

89, 928

93, 300

31, 500

7

47, 889

103, 065

106, 790

110, 795

35, 900

8

54, 442

117, 168

121, 403

125, 956

40, 800

IDLE


F43658

Figure 9G-3 THP DC Link Voltage vs Speed Graph

Maximum Voltage Reference Initial voltage Reference Dynamic Brake Voltage Reference

2900 Volts Throttle 1 Stall Reference 600 Volts

DC LINK VOLTAGE: The table below shows the DC link voltage reference as a function of motor RPM, for Power mode operation. (For new wheels, there is approximately 42.5 RPM/MPH.) The display signal that gives this voltage reference is, “MGV Lmt”. The voltage feedback is given by, “MG V”, or, “DCL V”.

9G-14


0

AC Traction System


TYPICAL LOAD TEST SIGNAL VALUES: The following table gives typical values for several important signals, for load test operation, for a 3939 THP GT46MAC locomotive. Voltage and Current. Values will vary somewhat from locomotive to locomotive. The KW Fbk and Eng RPM values should be fairly consistent.

Signal T/H

KW Fbk

Eng RPM

MG V

MG A

MGfldA

CA V

LR%MAX

GRID 1A or GRID 2A

Gblw A

1

133

269

510

260

18

73

100

130

40

2

294

343

765

383

23

92

100

191

52

3

665

490

1, 153

577

27

132

100

288

72

4

945

528

1, 437

718

38

152

100

359

92

5

1253

651

1, 650

825

43

175

100

412

103

6

1820

729

1, 980

990

55

196

100

495

128

7

2400

820

2,222

1,111

70

221

100

555

145

8

2757

904

2, 378

1,189

83

242

100

594

160

9G-16


0

SECTION 9H. LOAD CONTROL The load control system on a diesel-electric locomotive regulates main generator output to be within certain boundaries or references. These references include engine power, generator output voltage, inverter/motor torque, and generator field current. The calculation and use of these references can be modified by load test, turbo boost and certain trainline-driven modifications (i.e.: Slow Speed Control). The Load Control system of AC locomotives equipped with a 710 series engine is based on Traction Horsepower (THP) control while the Load Control System of AC locomotives equipped with the “H Engine” is based on Brake Horsepower (BHP). In both cases the Main Generator output is controlled based on a voltage reference which is based on throttle position and motor RPM. In its purest sense, EM2000 is no longer a power controller, it is a voltage controller and it is responsible for maintaining a constant voltage on the DC link that provides the power to the inverters. The application of power at the wheel/rail interface is controlled by the Traction Computers based on the torque references provided by EM2000. The torque references (one per Inverter/Truck) calculated by EM2000 based on the throttle position, power available, and the motor RPM. EM2000 still controls the output of the Main Generator by controlling the Main Generator Field Current using the same SCR Assembly used on other EMD locomotives. It is also calculating two Main Generator Field References simult-aneously, but these references will only come into play when the locomotive is operating in dynamic brake at slow speeds, or when there is a locomotive defect, which will be discussed later. In load test the Main Generator output is controlled based on a voltage reference which is based on the throttle position and the grids applied to the locomotive. The torque references to the Traction Computers are set to zero while in Load Test. Within the context of this manual load control will be presented under seven titles. 1. Engine Power Capability, 2. Power Reference, 3. TCC Power Controller, 4. Final Voltage Reference, 5. Locomotive Torque Reference, 6. TCC Torque Reference, 7. Main Generator Field Current Reference.

LOAD CONTROL 9H-1

Each of the above titles is a reference signal developed through a decision making process involving numerous inputs. Each title will be presented separately starting with Engine Power Capability.

TORQUE Before we discuss the control system in detail, it is important to understand the concept of torque and how it relates to tractive effort/horsepower output of the GT46MAC. Torque, or moment of a force is a measure of the tendency of the force to rotate the body upon which it acts about an axis. In other words, Torque = force x distance. As applied to the locomotive wheel, the force is the tractive effort applied to the rail, and the distance is measured from the wheel/rail interface to the center of the wheel. In English units, torque is expressed in units of FT-LBS. Figure 9H-1 illustrates the concept discussed above. The total tractive effort of the locomotive is the sum of the force generated by all six wheelsets.

Figure 9H-1 Tractive Effort at Wheel The traction motors generate the torque that is transmitted to the locomotive wheels. Therefore, there will be varying TORQUE references for each throttle position. There is however another parameter that must affect the torque reference, locomotive speed.

9H-2


0 There is another mechanical relationship between torque and horsepower which is defined by the following formula:

H.P.=

Force x ft / minute Force x velocity = 33000 ft-lbs / minute 33000 ft-lbs / minute

For every throttle position, the diesel engine is capable of generating a given amount of horsepower. Taking throttle 8 as an example, the 710G3B diesel engine in the GT46MAC can generate 3939 tractive H.P. (2557KW in electrical terms). Therefore, as the amount horsepower is held constant, and as velocity or forward motion of the locomotive goes up, the force, or tractive effort must go down. Figure 9H-2 shows the tractive effort vs. speed curves for all throttle positions over the entire speed range of the locomotive. The portion of the curve marked "1" on the throttle 8 curve shows the point that tractive effort (force) starts to fall off due to horsepower limitations. To the left of this point, the straight line represents the maximum or PEAK tractive effort (force) that the traction motors are capable of developing. If the locomotive is operating in this portion of the curve, the locomotive is not putting down full tractive horsepower for that throttle position, it is torque limited. Also shown at point "2" on the graph is the locomotive's continuous rating.

F43659

Figure 9H-2 GT46MAC TE vs. Speed Curve LOAD CONTROL 9H-3

ENGINE POWER CAPABILITIES The following pages will describe the development of two signals; one is a control status describing any limitations imposed (EnPwStat) and the other is a representation of this status (EnPwCap) called Engine Power Capability.

Figure 9H-3 Load Control - Engine Power Capability

9H-4


0

Figure 9H-4 Engine Power Reference Diagram

LOAD CONTROL 9H-5

ENGINE POWER REFERENCE Figure 9H-4 shows the relationship of signals required to develop a power reference called Engine Power Capability, or EnPwCap, which is viewable on the EM2000 display. This reference is expressed in terms of kilowatts, or KW. On Figure 9H-4, this reference appears at the far right hand portion of the diagram, and is a major component in the development of the Traction Power Reference, which will be covered later. The Engine Power Capability can be influenced by several factors. The limiting factor for Engine Power Capability can be easily determined by looking at the Engine Power Capability Status, or, EnPwCst, which is viewable on the EM2000 display. In normal operation the status displayed for EnPwCst will be the same as MG Stat, assuming the engine is the power limit on the locomotive. If the output of the Main Generator is being limited to less than Engine Power Capability then EnPwCst and MG Stat will not be the same. EnPwCst will reflect what would limit engine output if the locomotive were operating to the engine’s capability and MG Stat will reflect what is actually limiting the Main Generator output at that time. Following is a list of the possible EnPwCst, that can occur. BCP - Barometric Compensation Power is determined by input from the barometric pressure transducer, labeled BAR PRS on the locomotive electrical schematic and is viewable on the EM2000 Display under the screen name Bar Prs. The transducer is accessible from the front of the main electrical cabinet. The purpose of barometric compensation is to reduce visible emissions in lower throttle positions and improve transient engine response. The transducer feedback is only in use in throttle positions 3, 4, and 5, but will also be used in throttle positions 6, 7, and 8 if there is a failure of the turbocharger speed probe. PRP - Protection Engine Power Limit becomes active when it becomes necessary to reduce power output of the diesel engine due. An example of this protection would be “Dirty air Filters - Throttle 6 Limit”. EMDC - EMDEC Power Limit is activated by the EMDEC system. An example of a power limit activated by EMDEC would be a power reduction resulting from low airbox pressure. If this status is active, an investigation of the EMDEC system with the EMMON program is required. RPMP - Engine Speed Power Limit is one two desired status, and indicates that everything is working properly. This is a power function based on engine RPM. ETRK - Engine Power Tracking Limit is the other desired status, and indicates that everything is working properly. This is based on kilowatt feedback as calculated by main generator voltage and the sum of the TCC currents.

9H-6


0 TBP - Turbocharger Speed Power Limit can only be activated in throttle 8, when the turbocharger hits a set RPM. This status will then act to limit engine power available, by reducing the load on the diesel engine. As the turbocharger is driven by heat, the reduction in load will result in lower exhaust temperatures, and the turbocharger RPM will reduce. This status should only occur at higher elevations. EOPL - Engine Overload Protection Limit protects the engine from being overloaded by the load control system. On locomotives equipped with woodward Governor controlled engines, the EM2000 input is from a load regulator similar to the load regulators on older EMD locomotives. (The load regulator is now an integral part of the governor assembly.) On locomotives equipped with EMDEC controlled engines, the EM2000 input comes through a serial communication link from the EMDEC system. The EM2000 input from either system is viewable on the display. On governor controlled locomotives the input is LR %MAX and on EMDEC controlled locomotives the input is Engine R. The EM2000 will take the EMDEC input and use it to calculate a LR %MAX value which is viewable on the display. The interpretation of the LR %MAX signal is the same regardless of the source and if the LR %MAX is less than 100, EM2000 is reducing power output because the engine's capabilities are less than the load being requested. If this is the case, there is a problem with the diesel engine or support systems causing the diesel engine to generate less than rated power. ETEP - Engine Temperature Engine Power Limit occurs if the engine temperature as measured by the temperature probe(s) has reached an over temperature condition. This function mimics the operation of the ETS, or Engine Temperature Switch on older locomotives. On 710 engine equipped locomotives, if the coolant temperature reaches 212 degrees F, the locomotive will go to throttle six limit. Cooling system options dictate which probe(s) feedback are used for engine temperature control. If the locomotive is equipped with a conventional cooling system consisting of left and right bank water pumps, two engine temperature probes ETP1 and ETP2 are applied. EM2000 will use the highest non-failed probe feedback for control. The EM2000 will consider a temperature probe failed if it reads less than -55 degrees C or greater than 150 degrees C. If the locomotive is equipped with a "split" cooling system, consisting of a main water pump on the right bank and an aftercooler water pum0 on the left bank, three temperature probes are applied. The first, named ETP, is applied in the maiin engine coolant stream and used as the EM2000 feedback unless it is failed. The other two temperature probes are applied in the aftercooler coolant stream an are named AWTAOF and AWTROF. If the ETP is failed, EM2000 will use these temperaature probe feedbacks to calculate engine water temperature. The desired Engine Power Capability Status is either RPMP or ETRK. If ENPrCst does not indicate either of these two values there may be a problem with the engine. The cause could be the result of ambient conditions, locomotive engine and/or support system problems, or failed feedback devices.

LOAD CONTROL 9H-7

TRACTION POWER REFERENCE The following pages will describe the signals required to develop the Traction Power Reference (KW Ref) signal. Figure 2.2.1, shows the relationship of signals required to develop a power reference called Traction Power Reference, or KW Ref, which is viewable on the EM2000 display. This reference is expressed in terms of kilowatts, or KW. On Figure 2.2.1, this reference appears at the far right hand portion of the diagram, and is a major component in the development of the TCC Power Reference, which will be covered in the next chapter, and the Final Voltage Reference, which will be covered later. The Traction Power Reference will be the minimum of the four items listed below. 1. Self Load Test Power Limit This limit is only applicable in load test on locomotives equipped with a split alternator (SD80/90MAC). It appears on the EM2000 display as LT_PrRf. 2. Speed Control Power Limit This limit is only applicable if the locomotive is set up in speed control mode. If the locomotive is set in speed control mode, the OP Mode is SSPW. 3. Rated Traction Power Limit This limit applies if the locomotive is operating in MG Stat TRAC. This status will be in force when the traction power desired is less than the total power available for traction. An example of conditions that could cause this status would be if the locomotive’s traction motors are hot (greater than 200 degrees C), and the inverter is derating to keep the traction motors from experiencing thermal damage. Rated Traction Power Limit is viewable on the EM2000 display screen as RATPrRf. 4. Traction Power Capability On all EMD 2-cycle engine equipped locomotives (series 645 and 710), the Traction Power Capability is equal to the Engine Power Capability. If the locomotive is equipped with a 4-cycle “H” engine, the traction power capability is less than engine power capability, as the software algorithms factor in generator efficiency (set to 1 for 2-cycles). There is an important difference between 2 and 4-cycle applications at this point. For 2-cycle engines. The software is a “Tractive Horsepower” controller. For 4-cycle engines, the software is a “Brake Horsepower” controller. It should be noted that AccShHP and AuxShHp will always be equal on all freight locomotives and that on locomotives with 2 cycle engines, AccShHP and AuxShHp are set to zero, and have no effect on the KW Ref calculation.

9H-8


0

Figure 9C-5 Traction Power Reference Diagram. LOAD CONTROL 9H-9

Figure 9C-6 Load Control - Traction Power

9H-10


0

TCC POWER CONTROLLER The following pages will describe the relationship of signals required to develop TCC Power Reference signals, “T1PrRef and T2P2Ref”. Figure 9C-8 shows the relationship of signals required to develop a power -reference called TCC Power Reference, T1PrRef (Inverter 1) or T2PrRef (Inverter 2), which are viewable on the EM2000 display. These references are expressed in terms of kilowatts, or KW. Figure 9C-8 this reference appears at the lower right hand portion of the diagram, and is one of the components used in the development of the TCC Torque Reference, which will be covered later. It should be noted that Figure 9C-8 shows the signal flow for calculating the TCC Power Reference for Inverter 1. A similar calculation must be made for the TCC Power Reference for Inverter 2 and the only changes to the signal flow will be to replace the references to Inverter 1 to Inverter 2 and the references to Inverter 2 to Inverter 1. The TCC Power References are also calculated whether the locomotive is operating in power, dynamic brake, or rollback mode (SD80/90MAC only). At the upper left hand corner of the diagram are two references: power or brake mode that may be applicable, depending on the operating mode. If the locomotive is in power and moving in the direction of the reverser handle, it will use KW Ref as the overall power reference. If the locomotive is operating in dynamic brake, then the Dynamic Brake Power Limit will control the overall power reference. This input will change directly proportional to the 24T signal from the dynamic brake handle and is viewable on the display as DbPrLm. On the SD80/90MAC, if the locomotive is operating in “rollback” mode, the overall power reference will be a function of the grid capacity available. In rollback mode, as soon as the rotor rpm leads (is greater than) the rpm of the rotating magnetic field, it will begin to act as an alternator and generate power. We need to dissipate the power created in rollback mode through the grids until the rotor rpm lags (is less than) the rpm of the rotating magnetic field and the motors begin to act as motors. (Not applicable to GT46MAC). One of these three power references, and the power reference for the other Inverter (TCC2 Pwr in this case) will be used in a software algorithm called “Load Sharing Logic.” Load sharing allows one inverter to generate more than 50% of total locomotive power if conditions demand it. One example of load sharing would be in the event an inverter is cut out. On an GT46MAC, the remaining inverter will generate 10% more power (more on an SD90MAC with 2-cylce engines). Another example would be in poor track conditions where the leading truck is unable to generate its share of the torque, and the torque limit of the second truck/ inverter is increased to greater than 50% of the locomotive total in order to attempt to put full locomotive power to the rails. The next step in the development of the TCC Power Reference will be to take the minimum of one of four values. This value is defined as the Pre Grid Cooling TCC Power Limit and is not viewable on the EM2000 display. LOAD CONTROL 9H-11

The first value is the load sharing power limit calculated above. The second value is a Traction Motor Power Limit and applies only to locomotives with electric motor driven TM Blowers. On the SD80/90MAC locomotives, if one of the blowers is inoperative, the TCC Power Reference for that truck will be limit to throttle 1. (Not applicable to GT46MAC). The third value is a Grid Switching TCC Power Limit that only applies to SD90MAC locomotives equipped with the “H” engine and the 5500 KW grid package. The power limit will switch depending on the state of the grid shorting contactors GS1 and GS2, which shunt out grid resistance above 50 MPH and reduce grid KW capability. (Not applicable to GT46MAC). The fourth value is the Maximum Inverter Power, which will be indicated by TC Stat = TCCP when in effect. This is a fixed value that represents the maximum power the inverter can control. This input will only control the TCC Power Reference if all three of the other inputs exceed the maximum inverter power limit. The software will now take the Pre Grid Cooling TCC Power Limit and compare that against Grid Cooling TCC Power Limit, and take the minimum of the two values. The Grid Cooling TCC Power Limit currently only applies to SD80/90MAC locomotives with a split alternator MG. This value can limit the grid power based on the speed of the dynamic brake blower. It is defined as the Unbounded TCC Power Limit. On locomotives without a split alternator MG the Pre Grid Cooling TCC Power Limit and Unbounded TCC Power Limit will be equal. The calculation now moves further to the right on our chart, to the development of the final TCC Power Reference, which is T1PrLm. This is developed by taking the minimum of the Unbounded TCC Power Limit and the TCC Low Power Adjustment Limit. The TCC Low Power Adjustment Limit is used to control the rate at which power will be reapplied after a period in which the inverter has reduced the power output to the truck for some reason. The basis for this input comes from TCC1 Pwr which is a value which is viewable on the display. The TCC Power Reference T1PrLm is now subject to rate limiting, which provides a smooth buildup of the power reference. This ensures that power is applied at a rate to reduce the potential for wheel slips/slides due to poor rail conditions. At this point, we can also examine the status of the TR Stat, which will indicate either KW (Power) or T (Traction) The Rated TCC Power Reference is then used for development of the TCC Torque References. The reference can be viewed on the display and is named T1PrRef. This value is expressed in terms of KW. It must be remembered that the same process defined above is being run for Inverter 2.

9H-12


0

Figure 9H-7 Load Control - TCC Power Controller.

LOAD CONTROL 9H-13

Figure 9C-8 Traction Power Reference Diagram. 9H-14


0

FINAL VOLTAGE REFERENCE The following pages will describe the relationship of signals required to develop Final Voltage Reference. Figure 9C-10 shows the relationship of signals required to develop a voltage reference called Final Voltage Reference, or LoVolLm, which is viewable on the EM2000 display. This reference is expressed in terms of volts. Figure 9C10, this reference appears at the far right hand portion of the diagram. The control of DC Link voltage is accomplished through development of this reference. EM2000 will vary main generator excitation to maintain the voltage level desired, based on operating mode, throttle position, and speed. If the load demands placed on the DC link are excessive, and the main generator is incapable of supplying the power demanded, the voltage on the DC link will drop. This will in all likelihood result in DC Link Undervoltage faults. The DC Link Undervoltage fault will probably be accompanied by a Main Generator Field Overexcitation fault. We start with the development of a minimum voltage reference in the upper left-hand corner of Figure 9C-10. There are four limits which are used to develop this reference. The actual value will be the minimum value of the four limits which are fixed limits resident in the EM2000 software. Each of the limits is associated with a specific MG Stat which can be viewed on the display. The four MG Stat limits are listed below. MAXV - This is the Maximum Voltage Limit that the main generator is allowed to reach under any condition. The value is set to protect the diodes in the main generator rectifier assembly. TCCV - The Final TCC Voltage Limit comes from the Traction Motor RPM vs. Voltage Reference graphs shown in the graphs in Section 9G for DC Link Voltage. The DC Link Voltage Reference will vary with Traction Motor RPM and Throttle Position. In Dynamic Brake this limit is set at a constant value. If the DC Link voltage exceeds this value the main generator will continue to be excited to this approximate voltage level in an open circuit condition. This is the result of the main generator rectifiers being reversed biased by the high DC Link voltage. PRV - The Protection Voltage Limit comes from the EM2000 protection routines. Under various fault conditions the EM2000 will reduce the output voltage until the fault condition is corrected or under control GRID - The Grid Drop Out Voltage Limit is used to allow the B contactors to de-energize without having to open under high DC Link voltage levels. It is used to drop out the dynamic brake grids when exiting Rollback operation which is only available on SD80/90MAC locomotives. (Not apllicable to GT46MAC). We now come to another comparison where we take the minimum of the above limits and compare them with two other values. The first value is the limit we have just established, Rated Voltage Reference.

LOAD CONTROL 9H-15

The second value, used in Load Test only, is derived from the Traction Power Reference KW Ref and the Alternator Load Estimate (calculates grid impedance). The output of this calculation is an Equivalent Power Voltage Estimate, which allows EM2000 to control power by actually controlling voltage and is only used in load test. The third value is the DC Link Voltage reduction, which can be requested by either Traction Computer. When it is the active control MG Stat = REDV. The minimum of the three values will be the Minimum Voltage Reference MGV Lmt. After subjecting the MGV Lmt to rate limiting, the Final Voltage Reference will be calculated and displayed as LoVolLm.

9H-16


0

Figure 9C-9 Load Control - Final Voltage Reference

LOAD CONTROL 9H-17

Figure 9C-10 Final Voltage Reference Diagram 9H-18


0

LOCOMOTIVE TORQUE LIMIT The following pages will describe the relationship of signals required to develop Locomotive Torque Limit. Figure 9C-12 shows the relationship of signals required to develop a torque reference called Locomotive Torque Limit, LoTqLm, which is viewable on the EM2000 display. This reference is expressed in terms of Newton - Meters (N-M). On Figure 9C-12, this reference appears at the right hand portion of the diagram, and will be one of the components used in the development of the TCC Torque Reference, which will be covered after this. The Locomotive Torque Limit determines the total available locomotive torque. We start in the upper left hand corner, where we make a determination whether or not we will use the stall torque limits, or backup torque limits. The decision on which to use is determined by the Radar State Flag, which is viewable on the EM2000 display as RdrStFg. A value of 0 indicates that EM2000 has determined the radar is functioning correctly, and EM2000 will use the stall torque limits. A value of 2 indicated the radar is failed, and EM2000 will use the backup torque limits. Backup torque limits are approximately 70% of the stall torque limits. Refer to the charts in Section 9G following the header “Power”. One can also determine which set of limits the locomotive is using by looking at TC Stat. If the locomotive is using stall torque limits, the TC Stat is ST. If the locomotive is using backup torque limits, the TC stat is BAT. This now brings us to another minimum comparison. The software now has an additional consideration called the Locomotive Speed Torque Reference, or SscTqLm, which will be active if the locomotive is in speed control mode. At this point, we will take the minimum value, and the TC Stat can have three additional possible states, ST, BAT, or SCT.

LOAD CONTROL 9H-19

Figure 9C-11 Load Control - Locomotive Torque Reference

9H-20


0

Figure 9C-12 Locomotive Torque Reference Generation Diagram LOAD CONTROL 9H-21

TCC TORQUE REFERENCE This chapter will describe the relationship of signals required to develop TCC Torque Limit. Figure 9C-13 shows the relationship of signals required to develop a power reference called TCC Torque Reference, T1Tor R (Inverter 1) or T2Tor R (Inverter 2), which is viewable on the EM2000 display. This reference is expressed in terms of Newton – Meters (N-M). On Figure 9C-13, this reference appears at the right hand portion of the diagram. These references will be sent to Traction Computer #1 and Traction Computer #2 via the serial link between EM2000 and the Traction Computers As was the case with the TCC Power Controller, the same signal flow diagram is used to calculate the TCC Torque References for both Inverters. Figure 9C13 shows the information used to determine T1Tor R. To calculate T2Tor R replace the references to Inverter 1 to Inverter 2 and the references to Inverter 2 to Inverter 1. The TCC Torque References will be calculated whenever the locomotive is operating in power, or dynamic brake. The number will be positive if in power, and negative if in dynamic brake. It should also be noted that if an inverter is cut-out, its torque reference for that inverter is set to zero. Three values are used in the calculation of TCC Torque Reference. The first is Inverter Torque Reference. 1. Inverter Torque Reference (Limit) We start the calculation of inverter #1’s torque reference taking the LoTqLm developed earlier (if the locomotive is operating in power or speed control mode), or the Dynamic Brake Torque Reference DBTqLm. The Dynamic Brake Torque Reference is affected by the dynamic brake handle position (24T voltage) and the state of the NO IPS input. It should be noted at this point that reports of light loading in dynamic brake at low speeds can be caused by a false NO IPS input. If this is the case, instead of flat top brake effort between approximately 24 MPH and 1 MPH, the dynamic brake effort will fall off linearly between 24 MPH and 0 MPH. This is the same result that will occur on a DC transmission locomotive with no extended range dynamic brakes.

9H-22


0

LOAD SHARING TORQUE LIMIT The appropriate value is used by load sharing logic, along with the torque feedback from the other inverter to determine a TCC Load Sharing Torque Limit. Load Sharing Torque Limit is then compared against three other values, and the minimum is taken. A. Protection TCC Torque Limit The first is a value for Protection TCC Torque Limit, I1pTqLm. If this is in force, it can be determined by seeing TC Stat = PRT. B. Rollback Torque Limit The second value is the Rollback Torque Limit, which is used if the locomotive is starting to roll back before the grids are brought on-line, and is only used on locomotive equipped with rollback mode (SD80/90MAC). (Not applicable to GT46MAC). C. Traction Motor Blower Torque Limit The third value is the Traction Motor Blower Torque Limit. This function is the same as the TM Blower Power Limit, except here we set the torque reference for the truck with the defective blower to throttle 1. This will only affect locomotives with a electric motor driven TM blowers. (Not applicable to GT46MAC).

INVERTER TORQUE LIMIT The minimum of these three values becomes the Inverter Torque Limit which is not visible on the EM2000 display. Inverter Torque Limit value is then compared to two other values. 1. Power Based Torque Limit The first is the Power Based Torque Limit. This signal is also not visible on the display, but is calculated from the Rated TCC Power Reference T1PrRef developed earlier, the Dual Power Controller TCC Power Feedback DpcPrF1, the Dual Power Controller TCC Torque Feedback DpcTqF1,and T1AvRpm. 2. Torque Feedback The second value is a signal developed by the DPC TCC Torque Feedback DpcTqF1. It controls the power TCC Torque Reference when the inverter is unable to generate a reasonable percentage of the torque from the previous torque reference calculation. A positive offset is added to the feedback value so that if the torque feedback does not equal the Power Based Torque Limit it will be ramped up to that limit when conditions permit. We will now take the minimum of the three values, Inverter Torque Limit, Power Based Torque Limit, and Torque Feedback as the TCC Torque Reference.

LOAD CONTROL 9H-23

Let us look at a typical example on how the locomotive works. If the locomotive is going 6 MPH in throttle 8, and conditions are ideal with no limits due to locomotive problems, the locomotive will be regulating torque to the stall torque value. As the speed rises to the point on the tractive effort vs. speed curve where the locomotive become power limited instead of stall torque limited, the locomotive will then regulate on the power available, converted to a torque reference. This means in normal conditions with no locomotive defects, at low speeds the TCC Torque References will be generated based on the Locomotive Torque Reference calculations. As locomotive speed rises the TCC Torque References will be limited by the engine power available. This is similar to a DC locomotive where starting power is limited by the current that flows into the motors (high torque), but as speed rises the limiting factor in locomotive performance becomes the power available from the engine.

9H-24


0

Figure 9C-13 TCC Torque Reference Generation Diagram. LOAD CONTROL 9H-25

Figure 9C-14 Load Control - TCC Torque Reference

9H-26


0

MAIN GENERATOR FIELD CURRENT REFERENCE The primary purposes of the Main Generator Field Current Reference are to maintain Main Generator Field Current at a minimum level in Dynamic Brake and to set an upper boundary limit to protect main generator and cabling from damage. The following pages will describe how the main generator field current reference performs this function. Figure 9C-16 shows Main Generator Field Current Reference, or MGFA Rf, which is viewable on the EM2000 display. This reference is expressed in terms of amps. On Figure 2.7.2, this reference appears at the far right hand portion of the diagram. This signal ensures that the field current remains at a minimum value, and sets an upper boundary limit to protect the main generator and associated cabling. The reference is calculated while in power and dynamic brake. The first thing we need to develop is the MgFldLm or Main Generator Current Limit. This is determined by taking the minimum of the following two values. The first value is determined by Engine RPM. Based on engine RPM, the field current will be set from pre-programmed values. There are values for both short time ratings and continuous rating, similar to what occurs with traction motor current on a DC locomotive. The current can rise to a short time value for a period of time until EM2000 decides to reduce to a continuous rating. No damage will occur to electrical equipment, as there is a safety factor involved. This allows the locomotive to generate higher levels of main generator field current for short periods of time to take care of transient requirements. The second value is determined from the LoVolLm which was calculated in DCL V TCC Voltage Limit Graph (Refer to Section 9G). This value is used by a main generator voltage controller algorithm to develop the Main Generator Field Current Desired value, which is viewable as MGFdrDe. If the locomotive is regulating on either of these values, the MG Stat will display as GX. This is not a desired mode of operation. If everything is working properly, the locomotive should be regulating main generator output by controlling the DC Link voltage with the voltage control algorithms, and power applied to the rails with the torque control algorithms. If the locomotive is controlling for long periods of time on the generator field reference, then there is something wrong, such as a shorted SCR, an excessive number of failed diodes and fuses in the main generator rectifier banks, or shorted rotor coils. At the same time EM2000 is calculating a maximum field current limit it is also calculating a minimum field current limit. A minimum field current is necessary when the locomotive is operating in dynamic brake and the DC Link voltage is over 600 VDC. At this time, the main generator is reverse biased, and not supplying power to the DC Link.

LOAD CONTROL 9H-27

As the locomotive speed drops and the DC Link voltage falls below the minimum required for dynamic brake, the main generator must once again supply to the inverters so they can create the rotating magnetic field in the traction motors which allows us to draw considerable power from the motors creating dynamic brake effort. The maintaining of a minimum field current insures that the main generator is ready to supply the required power as soon as the DC Link voltage drops below the minimum require level. When the locomotive is controlling main generator excitation on the MgFdIMn the MG Stat will be MFA. The Main Generator Field Current Limit MGFldLm is compared with the Main Generator Field Current Minimum MgFdIMn, and the maximum of the two values is taken.

DEFAULT LIMITS FOR NON-ACTIVE FUNCTIONS There are “stay out of the way” limits for power, locomotive and inverter torque, main generator output voltage and current, motor current and main generator field current. There are several functions that conditionally provide limits, such as protection and transient functions. When these functions are disabled or are not intended to affect locomotive operation, they need to default to a “stay out of the way” limit. This is allowable since the output of the functions that use this default are always inputs to minimizing blocks. The “stay out of the way” limits are typically at least thirty percent above the nominal throttle 8 limits.

“Stay Out of the Way Limit

Actual Value being used

Locomotive Power

6, 000 watts

Locomotive Torque Inverter Torrque M.G. Voltage

9999 volts

M.G. Current Motor Current M.G. Field Current

9H-28


999 amps

0

STANDARD LOAD CONTROL VARIABLES - MONITOR SYMBOLS AND DISPLAY NAMES There are certain variables that are used regularly for load control and other testing. Particularly when using scripts, it is useful to have standard symbols for these variables.

Signals generated by load control. Monitor Symbol

Display Name

Description (spec ref.)

Transmission Type

power_avail

KW Max

traction power reference

both

load_ration

LF% Max

load ration

both

tcc1pwr_ref

PRPRQ

inverter 1 power reference

AC

torref_1

T1Tor R

inverter 1 torque reference

AC

torstat_1

inverter 1 torque status

AC

tcc2owr_ref

inverter 2 power reference

AC

inverter 2 torque reference

AC

inverter 2 torque status

AC

rated voltage reference

both

vmglim

final voltage reference

both

mafa_rf

mg field current reference

both

torref_2

T2Tor R

torstat_2 vmgdes

VDesRef

LOAD CONTROL 9H-29

Signals NOT generated by load control, but used by it Monitor Symbol

Display Name

Description (spec ref.)

Transmission Type

avg_mtr_spd

AMtrMPH

average motor speed

AC

throttle

Thr Pos

throttle handle position

both

throttle used for choosing engine speed

both

eng_throt eng_rpm

Eng RPM

engine speed based on CA frequency

both

tpu_rpm

TPU RPM

turbo speed

both

throttle used for choosing voltage reference

AC

voltage feedback used by controller 7

AC

throttle used for choosing loading levels

AC

volt_throt dcl_V

DCL V

trac_throt mg_power

Kw fbk

locomotive power feedback

both

enginer

EngineR

EMDEC engine ratio

both

tcc1pwr

TCC1 Pwr

inverter#1 power feedback

AC

torfb_1

T1TorF

inverter#1 torrque feedback

AC

tcc2pwr

TCC2Pwr

inverter#2 power feedback

AC

torfb_2

T2TorF

inverter #2 torrque feedback

AC

9H-30


0

Figure 9C-15 Load Control - Main Generator Field Current Reference Diagram LOAD CONTROL 9H-31

Figure 9C-16 Main Generator Field Current Reference 9H-32


0

SECTION 9I. ADHESION Adhesion control is a locomotive function that deals with wheel slips. In some cases, zero slip (or minimal slip) is desired; in other cases, higher levels of slip are permitted. Regardless of approach, the “bottom line” of as wheel slip system is how much the locomotive can pull after wheel slips have been considered. A figure of merit is adhesion, which is the ratio of drawbar force to locomotive weight. The “dispatchable adhesion” is the overall adhesion rating of a locomotive. It can be used as a measure of how much a locomotive can pull. Using the dispatchable adhesion rating of a locomotive allows the railroad to determine how many locomotives will be necessary to pull a specific train over a specific section of railroad. There are three adhesion control systems on the typical AC locomotive. Each system functions independent of the others, but only one system can be in control at anytime. The three adhesions control systems are: • Controlled-Creep - Radar Dependent, • Back-up Wheel Slip - Non Radar, • Starting (W/S) - Non Radar,

CONTROLLED CREEP The Controlled-Creep system permits moderate levels of wheel slip which has the effect of actually increasing adhesion. Because of this characteristic, Controlled-Creep is the primary adhesion control system for the locomotive. For the system to function a true ground speed signal (radar) is required. Should this signal be unavailable, the Controlled-Creep system will not work and it is for this reason that two other adhesion systems exist.

BACK-UP WHEEL SLIP CONTROL SYSTEM The first of these systems is the back-up wheel slip control system which resides in the Traction Computer. This system considers parameters such as dN/dt and dN, and corresponds to the “Back-up Wheel Slip” system of the DC locomotive. Note that this system is part of the Traction Computer although EMD is responsible for its performance.

STARTING SYSTEM - WHEEL SLIP The second (non-radar) wheel slip system resides in the Locomotive computer and handles low-speed situations (below ª1.5 MPH) where the radar signal is not active. This system is known as the “Starting System” since it is used to start trains from standstill. Since this type of performance is critical to the overall performance of the locomotive, and because it must transfer smoothly into the Controlled-Creep system, it is part of the Locomotive Computer. It also considers the dN/dt and dN parameters when it is active controlling the locomotive adhesion. Ironically, the computations are based on wheel speed information obtained from the Traction Computers.

ADHESION 9I-1

DEFINITION •

Slip and creep are often used interchangeably.

•

Slip is the additional speed that a wheel may have,

•

Creep is the slip level divided by the locomotive's speed,

•

For example, if the locomotive is moving at 12 MPH and the wheel is turning at 13.2 MPH, then there is 1.2 MPH slip or 10% creep,therefore: 13.2 -12 = 1.2 slip level

1.2 X 100 = 10% creep 12

There can be several other EM2000 features which can effect wheel slip, and ultimately adhesion. The Sand System is the most common of these additional systems. It is designed to apply sand between the wheel and rail under conditions of poor adhesion. The addition of sand tends to change the characteristics of wheel slips so that a higher adhesion results.

WHEEL SLIP STATUS VARIABLE This section on wheel slip is included for your general information. It is not available to view/monitor on AC units. The wheel slip status variable, which has a display name of, “WS Stat”, indicates what mode the locomotive adhesion system is operating in. There are four general modes for both AC and DC locomotives, and one additional mode for DC locomotives. These modes are listed in the table below, along with their display or monitor name, an explanation of each, and the numerical value that is assigned to each, as would be seen in the EM2000 monitor.

SIGNAL AVAILABILITY Since the adhesion system modes are simpler on AC locomotives than on DC locomotives, this variable is not available on AC locomotives through the display, or EM2000 monitor.

9I-2 GT46MAC Locomotive Servive Manual

0

Definition Table Wheel Slip Status

Description

Display Name

Idle Mode

This mode is actiive when the locomotive is not in a loading Mode, i.e. Idle

IDLE

System Starting

This mode is actice at low speeds, when there is not a reliable output from the radar. The radar typically active above about 1 MPH. The starting system will normally be active up to 1.5 MPH, and it may be active up to 3 MPH, under high adhesion conditions

1

Controlled

This is the creep mode known by most as “Super Series.” This mode is more formally known as, “Controlled Creep” on AC locomotives. In this mode the Radar is used as a groundground speed reference, and the traction motor wheel speed reference is controlled to allow the desired level of creep. The speed reference (TxN=dN) is sent to the traction inverters and the inverters reduce the torque output of the tractin motors if the speed reference is exceeded.

2

Backup System

The traction inverters monitor the wheel speeds, primarily looking for high accelerations, and reduce the motor torque accordingly. The operation in the backup system is most obviously indicated by the, “N + dN”signals being at 3600.

3

CONTROLLED-CREEP SYSTEM - General Controlled-creep takes place during power, Speed-Control power, dynamic brake, blended brake, opposite direction brake, and rollback modes as long as all the proper feedback signals are present. Controlled-creep involves computing wheel RPM limit (TxN+dN) signals and sending them to the appropriate inverter controller. The sign (value) of N+dN is positive when the locomotive is moving in the forward direction and negative when moving in the reverse direction. The magnitude of the N+dN should be greater when operating in “Power” and lower when operating in “Dynamic Brake” (approximately 4% max.). Controlled-creep reference (limit) signals shall be computed whenever all of the following conditions are present when: 4. The locomotive is in the motoring mode or in dynamic brake. 5. A Controlled-Creep Failure is not present (RdrStFg = 0 Radar State Flag). A separate controlled-creep reference (limit) signal shall be computed for each inverter. The reason for this is to optimize performance for each inverter. Factors such as variable creep and recalibration account for different adhesion conditions and wheel diameters, respectively. A controlled-creep reference (limit) signal is not computed for any inverter that is cut out and the N+dN for that inverter is set to 3600 RPM, "OUT OF THE WAY".

ADHESION 9I-3

A controlled-creep reference (limit) signal is not computed when a ControlledCreep Failure is present which is signified by RdrStFg = 2. When a failure is present the N+dN for any active inverters is set to 3600 RPM. The Controlled-creep reference (limit) signals shall be set to zero whenever computations are not being made and a Controlled-Creep Failure does not exist (i.e.: Throttle - Idle, Reverser - Centered, & Speed - 0). The controlled-creep reference (TxN+dN) is the primary speed reference given to the Traction Computers during starting and controlled-creep operation (when the radar signal is valid, above 1.5 MPH). In power, the controlledcreep reference permits additional wheel creep. A positive dN applies in this case. In dynamic brake, the controlled-creep reference permits a small amount of wheel slide (slower-than true ground speed) which produces a negative dN. Remember, the value of the TxN+dN value (“+” or” -”) is based on the direction of travel of the locomotive, while the sign of dN is positive when the locomotive is operating in power and negative when the locomotive is operating in dynamic brake One way to understand controlled creep is to examine the dN signal. It is plotted versus train speed in absolute terms and as a percentage. In general, this relationship changes with locomotive model and actual performance depends upon the parameters listed in the locomotive characterization data base. .

Figure 9I-1 Locomotive Speed - “Motor” RPM

Figure 9I-2 Creep Percentages versus Locomotive Speed. 9I-4 GT46MAC Locomotive Servive Manual

0

BASE DN Base dN provides a nominal level of wheel creep. It also serves as the initial creep level when wheel creep begins. Operation with this amount of creep is sufficient for proper locomotive operation over the entire speed range. Rapid decelerations have been seen to cause higher levels of slip and increased levels of torsional vibration. Accordingly, the dN value is reduced based upon the amount of deceleration. A -2.0 RPM/second (» -0.05 MPH/se) low end is incorporated to prevent unloading due to unforeseen problems.

ADDITIONAL dN During times of poor adhesion, increased levels of creep are often helpful. Oily rail and other low-adhesion conditions generally have a Friction-Creep curve that has no distinct peak. In these cases, higher creep levels provide higher adhesions. Hence, the control system is designed to permit significantly higher levels of wheel creep during times of sustained wheel creep activity. However, the additional creep is only provided at lower train speeds when high adhesion is an issue. Moreover, the maximum amount of creep is made a function of the adhesion. This boundary prevents creep that might lead to torsional vibrations. Also, based upon Friction-Creep research, there is not any useful friction beyond this boundary.

NOTE Additional Creep represents the maximum level of wheel creep that the control system will permit. It does not force the wheels to creep at a higher level. Rather, it allows the wheels to creep at higher levels if the wheels have already exhibited creep operation.

CONTROLLED-CREEP REFERENCE The creep-control system operates in power, Speed-Control power, dynamic brake, opposite direction brake, and Rollback modes. However, it does not operate near zero speed because of the lack of an accurate ground speed reference. The Starting System is active during this period. Regardless of which system is controlling locomotive adhesion, they are both sending a ControlledCreep Reference signal to the inverters. The only difference is the method of computation of the reference.

EM2000 DELTA N (dN) GENERATION Although wheel creep is expressed as a percentage, the control system works in absolute quantities. Hence, creep (slip) is expressed as an equivalent speed signal. To achieve this, the allowable slip is referenced to traction motor speed and appears in units of rpm. The dN value represents the amount of wheel slip the system will permit. In power, dN is positive and represents the amount of extra speed that will be permitted. In dynamic brake, dN is negative and represents how much the wheels are permitted to slow down. Minimum and maximum values are imposed for practical considerations. ADHESION 9I-5

Figure 9C-3 EM2000 Delta N (dn) Generation Diagram. 9I-6 GT46MAC Locomotive Servive Manual

0

Figure 9C-4 Load Control - EM2000 Delta N (dN) Generator ADHESION 9I-7

CONTROLLED CREEP & SPEED LIMIT GENERATION TRACKING dN The tracking dN signal provides the means for the creep level to change between the Base dN value and the Additional dN values. Essentially, this signal is set to be slightly higher than actual wheel speed. Hence, the name tracking is used. By placing the tracking dN value just above actual wheel speed, the wheels are free to turn faster. Rate limiting is applied to the tracking dN signal so that the creep reference will not increase suddenly - even if the wheels begins to slip rapidly. Under a few circumstances, smaller values of wheel creep may be requested (e.g., Lunge Detection and Current Maximizer). To keep the Tracking dN from working against these other functions, the tracking dN signal is frozen at its present value.

Figure 9I-5 Controlled Creep & Speed Limit Generation Diagram 9I-8 GT46MAC Locomotive Servive Manual

0

Figure 9C-6 Load Control - Controlled Creep & Speed Limit Generator

ADHESION 9I-9

LUNGE DETECTION This function monitors wheel accelerations since that information is useful in diagnosing several important conditions. One condition is large vibrations (or oscillations) in the motor torque. On a similar note, torsional vibrations exhibit the same characteristics, just at a higher frequency. Regardless of the cause, the lunge detector keeps track of wheel accelerations and reduces the amount of wheel creep when the accelerations become too large. The primary purpose of the Detector is to keep the wheel speed reference from getting too high based on adhesion conditions. In water/sand conditions the adhesion levels will decline if the creep percentage exceeds 3%.

REFERENCE DETERMINATION The dNTOTAL value is compared against a reference value. If too much acceleration is present, steps are taken to reduce the creep level. The reference is defined to be a function of the torque level based upon empirical testing and field experience. Its value is lower at higher tractive efforts since lunges are more likely to occur. To accomplish this, a multilinear approach is used called the lunge detector, where the parameters are dependent on the power rating of the locomotive.

TRACKING INHIBITOR Since the Lunge detector is attempting to modify locomotive performance by reducing the creep level, it is necessary to reinforce this activity by nullifying the function that attempts to increase the creep level. Specifically, the Tracking dN function should be inhibited (using the Trk_dNJ signal) whenever the ATTEN value is less than 1.0.

FINAL dN ADJUSTMENTS The delta N signal shall be multiplied by the attenuation factor from the Lunge detector to obtain a modified delta N. To prevent excessively small values of the modified delta N, the product shall be limited so it does not drop too low.

STARTING WHEEL SLIP SYSTEM In general, the system is designed to permit small levels of acceleration. The amount of creep is restricted to be within 10 RPM of the actual wheel speed. If wheel accelerations are seen, the creep reference (CrpLimJ) is reduced in order to obtain a “correction” by the inverter controller. This means when the Starting System is active the TxN+dN reference sent to the inverters is a function of the motor speed signals sent to the EM2000 by the inverters.

9I-10


0

ACTIVATION (Switch) The starting system shall be activated when the radar signal is “Not Valid”. This corresponds to near-zero speed when the radar signal is known to be zero. In this situation, a traditional creep system is not possible since there is no true ground speed signal. Hysteresis is required when transferring in and out of the starting system. When the starting system is active, it determines the creep limit signal. Otherwise, the normal creep control system provides the creep limit signal. Remember, only one system can be active at a time.

DETECTION Wheel accelerations are compared to a reference value. The reference value is chosen to discriminate between normal values and “run away” slip values. It is assumed that when a freight train first starts, there will not be any quick acceleration. Hence, a relatively low value is used. Each acceleration signal shall be compared with the reference to determine if a wheel slip is present. In power and rollback modes, motor torque is such to drive the wheels to a faster speed. (In rollback, this includes passing through zero speed). In dynamic braking modes, motor torque tends to slow the wheels down towards zero speed. These tendencies effect the manner in which a wheel slip is detected.

REFERENCE FILTERING In the starting system, the CrpLimJ reference is designed to track the feedback. Rate limiting is applied to distinguish between locomotive acceleration and actual wheel slips. Each loop that a dN/dt slip is detected, the CrpLimJ signal is changed by a specified amount. The value is selected to provide rapid reduction of the creep limit. Performance is set to reduce the creep level to zero in 0.5 seconds if a slip is present continuously. For loops when there was no dN/dt slip, the CrpLimJ signal is changed by a different amount. The particular value is set to provide a gradual increase to the creep limit. To permit rapid accelerations with a light train, a larger step value is used when the adhesion is low or the throttle position is low.

CONTROLLED-CREEP SPEED SIGNAL For proper creep control, a true ground speed signal is required. Traditionally, EMD has used a radar transceiver to obtain this signal. However, it does not work below approximately 1 MPH and is prone to other problems that cause it to be inoperative. Nevertheless, this signal has worked in Super Series control systems as long as the weaknesses just cited are also addressed. Two Controlled-creep speed signals shall be computed, one for each inverter -Rdr1rpm & Rdr2rpm.

ADHESION 9I-11

TRACTION MOTOR RPM RECALIBRATION In order to account for wheel diameter variations, recalibration is used to equate a known speed signal to ones that are uncertain. For this process, the radar speed signal (seen note *) is used as the reference and the individual motor RPM signals are designated as the uncertain variables. Recalibration is done by the EM2000 and provides two values, one for each inverter - Rdr1rpm & Rdr2rpm. Recalibrated speeds represent the RPM value a particular traction motor should be turning under non-slip conditions. This signal is also sent to EM2000 Delta N Generator.

NOTE Actually, the fitlered locomotive speed signal is used. However, since recalibration only takes place when the radar is operational, the radar signal is what gets seclected in the development of the filtered locomotive speed signal.

Figure 9I-7 Traction Motor RPM Recalibration Diagram When to recalibrate Recalibration factors shall be determined once each day (once each calendar day). Recalibration factors shall be initialized immediately following a power-up condition. Recalibration requires that at least one feedback signal on a truck be functional. The nominal ratio is as follows:

(12 in/ft)*(5280ft/mile)*85/16 42.51711 RPM/MPH=

(42” Dia) * PI * (60min/hour)

* Note: Divide by 1.0609 to convert to metric (RPM/KPH)

9I-12


0

CONDITIONS The following conditions shall all be true for recalibration to begin and to continue. If recalibration is in progress and one of these conditions becomes false, recalibration shall be stopped and restarted anew at the next opportunity. The emergency brake and independent air brake are off (wheels not sliding). No IPS = ON & PCS = ON The locomotive is in Idle (wheels not slipping). Op Mode not Power or DB

PROP is OK

Filtered locomotive speed signal exceeds 5 MPH and any motor RPM signal3 exceeds 5 MPH. The rate-of-change of motor speed is within a ±0.2 MPH/second window. Only one of the six motor RPM signals needs to be checked. The above conditions have been present for 5 seconds. This allows the radar speed signal to stabilize before recalibration occurs. A radar failure condition is not present. RdrStFg = 0

NOTE Recalibration shall occur even if an inverter is cutout (as long as a valid RPM signal is available)

PROCESS Recalibration factors are determined by dividing the recalibrated RPM signal (TxRPMy) by the filtered locomotive speed signal4 (LocoMPH) converted to motor RPM. Note: x = Inverter/Truck # & y = Axle of Truck # The final recalibration factors shall be computed as the average of eight recalibration factors collected one per consecutive second. Once these samples have been averaged, the existing recalibration factors shall be updated. A seperate recalibration factor shall be computed for each motor and the highest TxRPMy/LocoMPH value for each truck becomes the values - RCal R1 & RCal R2.

ADHESION 9I-13

DEFAULT VALUE Recalibration values shall not change due to a system reset or a power-up. They shall return to their previous value. If any initial recalibration value falls outside the range of RCALMX (largest wheel diameter plus 5%) to RCALMN (condemning value less 5%), it shall be set to a default value of RCALDF. This situation may occur upon the very first power-up or when the memory module is replaced.

CONTROLLED-CREEP FAILURE The controlled-creep failure status shall determine when controlled-creep should be turned off and replaced by the wheel slip system within the inverter controllers. The philosophy is that if the feedback signals are good, then controlled-creep should operate without problems. Hence, the feedback signals will be checked. For AC locomotives, the only signal requiring fault detection is the radar signal.

WHEEL SLIP LIGHT The wheel slip light is used to signal the engineer (driver) when a severe wheel slip is present. The wheel slip light shall not be used to indicate wheel slippage when the locomotive is operating with controlled-creep (CrpLim). Conversely, the wheel slip light shall be operational when the radar signal has failed (Back-up Wheel Slip System). This is indicated by RdrStFg = 2 and by the TxN+dN values being set to 3600 RPM.

PROCESS A. In power and while in the “back-up” system, a wheel slip light signal shall be provided when the speed of the fastest motor exceeds the speed of the slowest motor by 50%. B. In dynamic or blended brake and while in the back-up system, a wheel slip light signal shall be provided when the speed of the slowest motor drops below 50% of the highest motor speed signal. C. Once a wheel slip light signal is provided, it shall continue for at least one second.

NOTE Other functions that drive the wheel slip light (wheel overspeed, slipped pinion, locked wheel, etc. shall continue to function and are not influenced by the Adhesion systems.

9I-14


0

SAND CONTROL LOGIC The sanding logic in this writeup only applies to the automatic sand control logic. The inputs from the lead truck sand switch and the manual sand switch will always override any automatic logic. •

The automatic sand request is based on a number of signals:

•

The truck power feedbacks, tcc1PWR and TCC2PWR.

•

The locomotive power reference, KW Ref.

•

The torque feedback from the inverters, T1Tor F and T2Tor F.

•

The torque references, T1Tor R and T2Tor R.

•

The TxRPMy corrected RPM signals from the inverters.

Automatic sand requests are based on a per inverter/truck basis. Thus, if one truck is slipping and having adhesion problems, a sand request can be made for that truck alone. Thus, if the other truck is not having adhesion problems, sand will not be requested and wasted. The automatic sand requests are indicated by SAND-1 and SAND-2. The automatic sand request for each truck will be based on a number of factors. We look to see if the truck power is lower then a certain percentage of the power reference, if torque feedback is lower then a certain percentage of the torque reference, and the throttle position is greater than throttle 3. If all three conditions are met, AND the wheel rpm signals have spent some time at or above the TxN+dN reference, then an automatic sand request is made. The sand will be applied for a minimum of 2 seconds initially. If while the automatic sand request is on: •

the power feedback goes above a percentage of the power reference, or,

•

the torque feedback goes above a certain percentage of the torque reference, or,

•

the throttle is reduced to throttle 3 or below,or,

•

the wheel speed feedbacks have not been at or above the TxN+dN reference within the past few seconds, the automatic sand request will be turned off.

This is very possible because as sand hits the rail, the adhesion conditions will usually improve and thus sand will no longer be needed. However, under some adhesion conditions as soon as the sand is removed the adhesion will once again deteriorate rapidly and the request to apply sand will once again be made. This will result in choppy locomotive operation to the detriment of train handling. To rectify this situation we monitor the timing of the automatic sand requests and will adjust the minimum time the sanders must remain on once an automatic sand request has been made. This minimum is initially 2 seconds.

ADHESION 9I-15

Every time an automatic sand request is made, the EM2000 will enforce a minimum on time for the sanding magnet valves. If the automatic sand request is repeated within one minute, then the minimum sand time is increased by 20 seconds. During that 20 seconds, the sanding magnet valves are held on regardless of the state of the automatic sand request (SAND-1/SAND-2). If the minimum hold time expires and the automatic sand request turns back on within a few seconds, another 20 seconds will be added to the minimum sand time. The minimum sand time can be increased up to a maximum of 60 seconds. When the automatic sand request turns off and there are no additional automatic sand request, the minimum hold time will slowly decay over a minute or two. After that period of time, the minimum sand hold time of 2 seconds will then be enforced.

9I-16


0

SECTION 10. LOAD TEST AND HORSEPOWER EVALUATION INTRODUCTION This section describes how to load test the locomotive and provides the calculated horsepower developed during load testing. The calculated load test horsepower data is useful for evaluating engine performance and auxiliary equipment load on the engine. It can be used to verify normal loading, or to detect improper loading, which can be caused by wear or by various malfunctions. NOTE The load testing procedures provided in this section are NOT intended for evaluating fuel consumption. (Refer to A.A.R. Standard S-505 for fuel consumption evaluation.) This section includes: •

Circuit Description

•

Circuit Control Description

•

Procedures

•

Evaluation Information

•

Service Data

DESCRIPTION Load testing checks diesel engine and main generator power without operating the traction motors. To perform a load test, the throttle handle is advanced while main generator power is applied across high-wattage grids of known resistance. This electrical load on the main generator mechanically loads the diesel engine. The following expression describes the electrical-to-mechanical loading ratio. 700 Watts(generator) = 1 Horsepower (engine) The GT46MAC locomotive is equipped for self-load testing: its control system can connect the dynamic brake grids, through brake contactors B1, B2, B3, and B4, across the main generator. Note: The term “load test” replaces “self-load test” in the balance of this description. Load testing is done only at locomotive standstill. The tester uses the EM2000 locomotive computer to perform the test. (Instructions for load testing and interpreting results appear later in the section.) Figure 10-1, page 10-2, illustrates the load test circuit, set up for testing. (B1, B2, B3, and B4 are picked up in the illustration.) Notice that in load testing, as in dynamic braking, the grids are connected to form two parallel circuits. The main generator halves are connected in series across the paralleled grid circuits in load test operation. For regulating load test operation, the computer uses current feedback signals from the grid current sensors (IB1 and IB2) and from the DC Link voltage sensor (VDCL). LOAD TEST AND HORSEPOWER EVALUATION 10-1

The locomotive computer sets up and controls load test operations. To perform the test, the tester communicates with the EM2000 locomotive computer using the display screen. First, the tester makes sure that all conditions specified on the computer screen are met. The tester then operates the throttle handle to load the main generator and diesel engine. The locomotive computer controls main generator loading during the test. The tester uses the EM2000 display panel screen and keys (pushbuttons) to monitor locomotive performance during the test. If a fault occur during the test, the locomotive computer records them in Archive memory. If appropriate, fault occurrences interrupt the load test. Detailed load test instructions appear later in this section.

F43344

Figure 10-1. Load Test Circuit (Self-Load Test) (Simplified Schematic) B1,B2,B3,B4 PICKUP & DROPOUT Before the locomotive computer picks up brake contactors B1,B2,B3, and B4, all following conditions must be met: • Load test request from EM2000 display. • DCL switchgear drops out • Reverser handle centered • Throttle handle in IDLE


0 B contactors drop out, ending load testing, when any of following conditions occur: • • •

Operator requesting end of load test (via EM2000 display panel) DCL switchgear picks up No main generator load for more than five seconds

If the locomotive computer drops out the B contactors because of either of the last two items, the computer locks out load testing and causes the NO LOAD TEST - GENERATOR OPEN CIRCUIT message to appear on the computer display until the throttle is returned to idle (regardless of MGV or MGA changes). The locomotive computer drops out the GFC contactor before it drops out the B contactors, enabling main generator/grid current to drop to a safe value before the B contactors open. In addition to computer logic operation (described above), DCL and B contactor interlock contacts are connected in the control circuit to ensure proper and safe operation of the load test contactors.

LOAD TEST 1 For Load Test 1 operation, the locomotive computer regulates main generator power at the same kilowatt levels as those used for motoring. In self-load testing, the locomotive computer need only perform KW regulation, not voltage or current regulation, because grid resistance is applied across the generator in two parallel circuits (shown in Figure 10-1), and generator output is not close to either the voltage limit or the current limit. When checking a “good” engine at throttle 8 in Load Test 1 under nominal operating conditions, the main generator will provide full rated traction power and EM2000 sets the fuel injectors through the Woodward Governor at a point less than the full setting. (Tables and charts later in this section explain nominal operating conditions.) If engine cannot produce full power in Load Test 1 throttle 8. (Fuel racks to MAX. fuel position). The governor drives the load regulator towards minimum excitation. EM2000 responds by an excitation current decrease to match the engine capability. The LR (Load Regulator) signal is displayed as a percentage.

LOAD TEST 2 Load Test 2 is used to verify the diesel engine capability; it also can be used to verify engine Governor injector system operation and load regulator operation. Load Test 2 operation is the same as Load Test 1 operation, except as follows.

In Load Test 2 operation, the locomotive computer raises the initial KW regulation limits for each throttle position 13% higher than they are in motoring and Load Test 1. The higher initial KW limits enable the diesel engine Governor to take over control of engine loading.

LOAD TEST AND HORSEPOWER EVALUATION 10-3

When testing a “good” engine that produced full power in Load Test 1, Load Test 2 throttle 8 should cause the Govenor to move the fuel injectors to the full power setting and set the load regulator function to approximately 90 %. Displayed horsepower should be noticeably greater than it was in Load Test 1. If there are engine problems, and the engine does not produce the expected level of power in Load Test 1, EM2000 adjusts the load regulator function accordingly. Switching to Load Test 2 then causes the engine to produce the same amount of horsepower as it does in Load Test 1, because EM2000 balances the electrical load with the injectors at full-fuel setting. EM2000 adjusts the load regulator function to approximately 13% lower than it should be in Load Test 1.

NOTE

Load Test 2 operation is allowed for 5 minutes maximum. After the time delay has expired, EM2000 automatically switches back to Load Test 1 The computer inhibits a repeat of Load Test 2 for about a 30 minute period. GENERATOR CIRCUIT RESISTANCE PROTECTION In load test, a locomotive computer routine protects the main generator against overloading caused by improper load resistance and against open-circuiting the main generator. If the routine detects any of these improper conditions, the computer locks out load testing and displays the appropriate message of the following group: • • •

NO LOAD TEST - GRID LOAD RESISTANCE TOO LOW NO LOAD TEST - GRID LOAD RESISTANCE TOO HIGH NO LOAD TEST - GENERATOR OPEN CIRCUIT

If the computer displays a message from the list above, and the problem is then corrected, the fault can be reset on the computer display panel to re-enable load testing.


0

LOAD TEST PROCEDURES Load test procedures follow this introduction: first the Short Load Test Procedure, starting below, then Standard Load Test Procedures, starting on page page 10-8. Use the Short Load Test Procedure for purposes such as: • Checking traction horsepower during scheduled inspections • Systems checking, during preventive maintenance • Troubleshooting Use the Standard Load Test Procedures for purposes such as: • Investigating unexpected short load test results • Checking the engine after it has been overhauled

SHORT LOAD TEST PROCEDURE To prepare for a short load test, be sure that all following conditions are met: • Throttle handle in IDLE position. • Unit NOT MOVING • Reverser CENTERED • Isolation switch in RUN • Generator Field switch UP • Engine Run switch DOWN on all units in consist, or M.U. cables disconnected on adjacent units • Ground Relay NOT CUT OUT • Engine RUNNING

• • • •

PCS CLOSED Air Brakes APPLIED

Active D.B. Grid Lockout Faults: NONE Black Panel Area Breakers ALL ON (No. 1 Electrical Control Cabinet)

After above preparations, proceed as follows: 1. Select Self Tests from page 1 of Main Menu screen (next), on computer display panel. (Move cursors to Self Tests with arrow keys, then press F3 function key.)

2. Select Self Load from Self Test Menu screen (next).


3. Entry Conditions screen (next) appears.

LT35670

A. Press CONTINUE function key (F1) under Entry Conditions screen. B. If all conditions listed immediately above Step 1 of this procedure are met, the Self Load Test Default screen appears. Skip to Step 4, page 10-6. C. If any of the conditions listed before Step 1 of this procedure are not met, the next screen appears, indicating improper load test setup.

LT35671

D. Correct improper condition(s) or End Test. As each improper condition is corrected, the next one appears on the screen. E. When no more improper conditions exist, Self Test Menu screen returns automatically. F. Select SELF LOAD from the Self Test Menu screen, then when Entry Conditions screen appears, press CONTINUE function key, which causes the Self Load Test Default screen, next, to appear.

LT35675

4. Press METERS key (F2) under Self Load Test Default screen (above). Self Load Test Meter Menu screen (next) appears.


0

LT35673

5. Select Cooling system from Self Load Test Meter Menu screen (above). Self Load Test Cooling System Default screen (next) appears.

LT35674

6. Check engine coolant water temperature indication on above screen: ETP1 F and ETP2 F readings indicate water temperature. If water does not reach 48.9°C (120°) at idle, throttle may be advanced to notch 2, but not beyond, until coolant does reach 48.9°C (120°F). CAUTION Do not load engine beyond notch 2 until engine coolant water temperature reaches at least 48.9°C (120°F). 7. Press METERS key (F2) on Self Load Test Cooling System Default screen to return display to Self Load Test Meter Menu screen (precedes Step 5). 8. Select Load Test. Self Load Test Default screen appears. (This screen is illustrated above Step 4.) 9. Advance throttle handle and observe HrsePwr and LR %Max indications on screen. If conditions are nominal, throttle 8 readings should settle at: •

4000 CV (3939hp)

•

LR Function %Max. 100

Tables and charts appearing later in this section describe nominal conditions. Other-than-nominal conditions, such as high altitude, may cause lower horsepower and load regulator indications. 10. Switch to Load Test 2 (power reference is increased by 13%) by pressing F1 key, then record HrsePwr after loading has increased to a steady reading. As soon as Load Test 2 is entered, phrase on screen above F1 key changes from LT 2 to LT 1. By pressing F1 key, you can switch back to Load Test 1 operation whenever you choose. You can switch back to Load Test 2 whenever you need to, by pressing F1 again.


NOTE

Load Test 2 operation is allowed for 5 minutes maximum. After the time delay has expired, EM2000 automatically switches back to Load Test 1 The computer inhibits a repeat of Load Test 2 for about a 30 minute period. 11. End load testing by returning throttle handle to IDLE. Display returns to Self Test menu screen.

STANDARD LOAD TEST PROCEDURES The setup for standard load testing depends on the purpose of the test. As used here, the phrase “routine load test” means a standard load test in which both of the following conditions are true: • Unit has self-loading capability. • Computer-displayed MG voltage and grid current accuracy not in question. Follow procedures under “Preparation for Standard Load Test,” page 10-8 and then proceed directly to “LOADING PROCEDURE,” page 10-13.

Preparation for Standard Load Test 1. Stop diesel engine and remove starting fuse. 2. Make sure fuel tank contains sufficient fuel for load testing. EMD recommends tank be full, or nearly full, to minimize fuel temperature rise during test. 3. Inspect engine air box. Check condition of piston rings and cylinder walls. 4. Inspect generator airbox. Replace blown fuses and/or shorted diodes. 5. Suspend thermometer at radiator air inlet grill (gets ambient temperature). 6. Remove larger of two pipe plugs on end of engine-mounted fuel filter assembly body. Install dial thermometer there to read fuel oil temperature. 7. Thermometer well is located in right bank water pump discharge elbow. Fill well with oil, and place glass thermometer in well to measure engine coolant water temperature. 8. In lube oil strainer housing, suspend caged thermometer below oil surface to measure oil inlet temperature. 9. Make sure air compressor will not engage by locking out manually MV-CC. 10. Be sure handbrake is set. Note: Air brake may also be applied, if desired, for extra security. However, remember that compressor will not pump air because MVCC is locked out. 11. Perform engine prestart inspections, then start engine, as instructed in Section 1 of this manual (“Engine Starting and Stopping”).


0 12. Make sure that all following conditions are met: • • • • • • • •

• • • • •

Engine oil pressure is SATISFACTORY. There are NO FUEL, OIL, OR WATER LEAKS. Throttle in IDLE position. Unit NOT MOVING Reverser CENTERED Isolation switch in RUN Generator Field switch UP Engine Run switch DOWN on all units in consist or M.U. cables disconnected on adjacent units Ground Relay NOT CUT OUT PCR Relay ON Air Brakes APPLIED NO Active D.B. Grid Lockout Faults Black Panel Area Breakers ALL ON (No. 1 Electrical Control Cabinet)

13. Main Menu screen (next) appears on locomotive computer display. Select Self Tests. (Move cursor to Self Tests with arrow keys, then press F3 function key.)

LT35668

14. Select Cooling Fans from Self Test Menu screen (next).

LT35704

15. All following conditions must be met to enable cooling fan test: • • • • • •

Engine running. Isolation switch in ISOLATE. Engine temperature in 48.9°C to 87.8°C (120-to-190°F) range. At least one engine temperature probe operating. Cold engine idle speed-up function not active. Reverser handle centered.


Unit not moving.

16. Select Test all fans from Cooling Fans Test Menu screen (next).

LT35705

17. A screen listing some previous requirements for cooling fan testing appears after Test all fans is selected. Press CONTINUE key (F1). 18. If any condition is incorrect for running the fans test, a screen will appear stating what is wrong. Correct the problem(s) or END TEST. 19. If all previously listed conditions for cooling fans test are met, Cooling Fan Test Ready screen (next) appears.

LT35706

Note: One person should observe radiator fans while another continues the test. 20. Press START function key (F1) under Cooling Fan Test Ready screen. Fan Function screen (next) appears and test starts.

LT35707

Definitions for symbols on above screen: Computer Output

>

Pick Up Contactor

<

Contactor Picked Up

aaaa

HALF, FULL,

Feedback to Computer

or OFF (Fan Speed)

or ON

xxx

OFF

nn

Test number (00 through 06)

START

pressed, 1 minute pause, then (20 sec. pause between tests):


0 Test 0

- Run fan 1 at slow speed.

Test 1

- Run fan 2 at slow speed.

Test 3

- Change fan 1 to fast speed.

Test 4

- Change fan 2 to fast speed.

Test 6

- All fans off.

Test sequence can be stopped at any time by pressing END TEST key (F4) under screen. If any radiator fan contactor fails to pick up or drop out, test continues until all fans are tested, then failure message(s) appear(s) on screen. If no radiator fan contactor failures occur during test, message says so at end of Cooling Fans test. 21. Press END TEST key (F4), which brings back Cooling Fan Test Menu screen. 22. Press EXIT key (F4), which brings back Self Test Menu screen. 23. Make sure that all following conditions are met: • • • • • •

• •

• • • •

Throttle handle in IDLE position. Unit NOT MOVING Reverser Handle CENTERED Isolation Switch in RUN Generator Field Switch UP Engine Run Switch DOWN on all units in consist, or M.U. cables disconnected on adjacent units Ground Relay NOT CUT OUT Engine RUNNING PCS CLOSED Air Brakes APPLIED NO ACTIVE D.B. Grid Lockout Faults

Black Panel Area Breakers (Except Accessories) ALL ON (No. 1 Electrical Control Cabinet)

24. Select Self Load from Self Test Menu screen (next).

LT35669


25. Entry Conditions screen (next) appears.

LT35670

A. Press CONTINUE function key (F1) under Entry Conditions screen. B. If all conditions listed in Step 23 are met, the Self Load Test Default screen appears. Skip to Step 26. C. If any of the conditions listed in Step 23 are not met, the next screen appears, indicating improper load test setup.

LT35671

D. Correct improper condition(s) or End Test. As each improper condition is corrected, the next one appears on the screen. E. When no more improper conditions exist, returns automatically. F. Select

Self Test Menu

screen

from the Self Test Menu screen, then when Entry Conditions screen appears, press CONTINUE function key, which causes the Self Load Test Default screen, next, to appear. SELF LOAD

LT35675

26. Press METERS key (F2) under Self Load Test Default screen (above). Self Load Test Meter Menu screen (next) appears.

LT35673


0

27. Select Cooling system from Self Load Test Meter Menu screen (above). Self Load Test Cooling System Default screen (next) appears.

LT35674

28. Check engine coolant water temperature indication on above screen: ETP1 F and ETP2 F readings indicate water temperature. CAUTION

Do NOT load engine beyond notch 2 until engine coolant water temperature reaches at least 48.9°C (120°F). If water does not reach 48.9°C (120°F) at idle, throttle may be advanced to notch 2, but not beyond, until coolant does reach 120°F. 29. Press METERS key (F2) on Self Load Test Cooling System Default screen to return display to Self Load Test Meter Menu screen (precedes Step 27). 30. Select Load Test. Self Load Test Default Meters screen appears. (This screen is illustrated above Step 26.)

LOADING PROCEDURE Complete “Preparation” procedure for standard load testing then proceed with load test as follows:

Note: All doors to inertial filter air compartments should be closed during load testing. 1.

Self Load Test Meter Menu

screen (next) should be on computer display.

LT35708

2. Select Load Test when above screen is displayed. Self Load Test Default Meters screen (next) will appear.

LT35675


3. Advance throttle to notch 1 or 2, which starts main generator loading. Check for following:

A. Main generator provides output. (Output should register on computer display for self load test, or on test meters for external load test.) B. Dynamic brake (or load box) cooling blower operates. 4. Provided that engine coolant temperature is 48.9°C (120°F) or higher, advance throttle one step at a time to notch 8. 5. Close all engineroom doors, and continue test at full throttle until engine temperature and engine cooling system operation are stabilized, as described in next step. (Ordinarily, this takes about half an hour when only checking horsepower. When checking oil cooler performance, however, it takes longer - usually an hour.) 6. Check lube oil and water temperatures periodically, until both remain unchanged throughout a 15 minute period.

Note: Opening engineroom doors to read temperatures may affect stability of conditions. Allow time for them to stabilize before taking next reading. 7. Record indicated engine horsepower into main generator (ENGShHp on screen), and also record fuel oil temperature, air temperature at radiator air inlet grill, and radiator cooling fan operating status (number of fans running, and running speeds: half, full, or off).

Note: Record main generator voltage and current indicated on meters (instead of recording “HrsePwr” from computer display). 8. Switch to Load Test 2 (power reference is increased by 13%) by pressing F1 key, then record HrsePwr after loading reaches a steady level. As soon as Load Test 2 is entered, LT 2 appearing on screen above F1 key changes to LT 1. By pressing F1 key, you can switch back to Load Test 1 operation whenever you choose. You can switch back to Load Test 2, if you need to, by pressing F1 again. 9. To end loading, return throttle to IDLE position. Self Test Menu screen appears. 10. Stop engine. Leave COMPUTER CONTROL and TURBO breakers closed (up) so that turbo lube pump operation is still enabled. 11. If special setup was used to prepare for load test, restore normal locomotive electrical system connections after lube pump has timed out. Disconnect meters that were connected for load test.


0

CALCULATING HORSEPOWER & EVALUATING RESULTS “Diesel engine brake horsepower” (BHP) means total observable diesel engine power. To calculate BHP, sum main generator horsepower with auxiliary horsepower, then adjust the sum to compensate for variations from A.A.R. standard load test conditions. (These standard conditions are listed in “SERVICE DATA” at the end of this section.) Use the following procedure to calculate the brake horsepower value: 12. Calculate auxiliary horsepower, AUXHP. AUXHP is the mechanical load imposed on the diesel engine by the auxiliary equipment listed in Table 101, page 10-16. To calculate AUXHP, sum the appropriate horsepower levels from the table, taking into account operating status of equipment during load test. For cooling fans, make sure to consider the quantity of fans operating, and their speeds. 13. Calculate BHP adjusted to A.A.R. standard load test conditions by using the following formula: (Step 1: HrsePwr or MGHP) + (Step 2: AUXHP) BHP = ____________________________________________ (A×B×C×D) “(A×B×C×D)” denotes factors that adjust BHP value to standard A.A.R. load test conditions. Factor A corrects for air temperature; B, for altitude (air density) C, for fuel density D, for fuel temperature. Use “CORRECTION FACTOR CHARTS” in “SERVICE DATA,” at end of section, to determine factor values. Factors are expressed as “Percent Actual Horsepower” on charts. Convert percentage from chart to equivalent decimal number for use in BHP calculation. (Example: “101.5%” converts to “1.015” factor.)

If calculated Load Test 1 and Load Test 2 BHP values are NOT close to corresponding nominal BHP values listed in Table , page 10-18, check the following, and correct as necessary: •

Proper auxiliary equipment operation;

•

Governor settings;

•

Valve timing;

•

Injector timing;

•

Bypass fuel sight glass (should remain empty);

•

Air filter cleanliness (check pressure drops);

•

Turbo screen cleanliness;

•

Condition of power assemblies;

•

Control system operation, including computer.

Barometric compensation and/ or turbocharger speed limiting functions of computer program may cause BHP to be lower than nominal, particularly when operating at altitudes higher than 5000 feet above sea level.


AUXILIARY EQUIPMENT LOAD ON DIESEL ENGINE The following table lists the diesel engine power required to operate accessory equipment:

Table 10-1. Auxiliary Equipment

Load (HP)

Auxiliary Generator, All Accessories Off:

10.0

Radiator Cooling Fans (8 Blade), Slow Speed:

12.0/Fan

Radiator Cooling Fans (8 Blade), Fast Speed:

75.4/Fan

Inertial Filter Blower

7.2

TCC Blowers

10/each

TCC Electronic Blower

9.3

Traction Motor Blower:: Shutters 1/2 open

40.0

Shutters open

113.0

Air Compressor, WLNA9BB, Unloaded:

16.5

Air Compressor, WLNA9BB, Loaded:

54.4

Notes:

1. Horsepower ratings in table are based on 904 RPM engine speed, CA6B companion alternator and A.A.R. standard conditions for load testing, described in Table Table on page 19 2. “Load Test 1 - Throttle 8 Nominal Engine BHP” rating listed in Table , page 10-18,presumes that above locomotive auxiliary equipment will be operating as described in Note 1of that table.


0

SERVICE DATA - LOAD TEST REFERENCES 710G3B Engine Maintenance Manual Lube Oil Cooler Test Procedure - in Section 3, Lubricating Oil System

PARTS AND EQUIPMENT

Description

Part No.

5000 Ampere, 50 Millivolt, 0.5% Meter Shunt

9322324

Spacers (8 required with 9322324 meter shunt)

9331267

Volt-Millivolt-Millimeter

8218499

1100/ 24 Cable (444,400 Circular Mills) Flaxen (cross-linked polyolefin), Specify Length

9086205

Terminal Lugs for 1100/ 24 Cable

8118062

1325/ 24 Cable (535,000 Circular Mills) Ethylene Propylene Diene with Hypalon Jacket, Specify Length

8421212

Terminal Lugs for 1325/ 24 Cable

8160274

RECOMMENDED CABLING FOR LOAD TEST DUTY Maximum Cable Size Current (Stranding)

Maximum Cable Size Current (Stranding)

660 Amps 550/ 24

1190 Amps 1325/ 24

810 Amps 775/ 24

1370 Amps 1600/ 24

1020 Amps 1100/ 24

1520 Amps 1925/ 24


THERMOMETERS REQUIRED: • • •

Dial indicating thermometer, 17.8-65.5°C (0°-l50°F), equipped with 1/4" N.P.T. threaded stud. Glass thermometer, 17.8-65.5°C (0°-l50°F). Glass thermometer, 37.8-121°C (l00°-250°F), bulb 1/4'' maximum diameter. Caged Glass thermometer, 37.8-121°C (l00°-250°F).

•

LOAD TEST SPECIFICATIONS

Basic Governor Rack Position: Engine Speed: Nominal Engine BHP:

Load Test 1, Throttle 8

Load Test 2, Throttle 8

(Notes 1,4)

0.82 In. (Notes 2,4)

904 ±4 RPM

904 ±4 RPM

= or > than 4075Hp

Notes for table follow, below:

1. Normally, in Load Test 1/ Throttle 8, EM2000, regulates engine THP. (Load regulator function stays at 100%.) This occurs because main generator load on engine plus auxiliary equipment load on engine totals less than maximum allowed by Governor setting. (Computerregulated Load Test 1/ Throttle 8 main generator output power level is 2828 kW±1%.) When main generator output is 2828 kW±1%, main generator load on engine is 4000CV (3939Hp) HP±1%. The sum of main generator and auxiliary equipment loading on the engine in adjusted to A.A.R. standard conditions, should be nominally = or > than 4075Hp main generator load plus auxiliary equipment load (See Note 3.)

Load Test 1,

In Load Test 1, diesel engine operates at constant horsepower, and rack position varies with test site conditions. Thus, Load Test 1 rack position is not specified in table.

2. In Load Test 2, engine BHP is regulated by load regulator function because locomotive computer Load Test 2 limit for main generator output is 3115 kW ±1%, well above level that EM2000 system allows during normal operating conditions. 3. In Load Test 2, engine operates at constant rack (should be.82), and observed non-adjusted engine BHP varies with test site conditions. Adjusted Load Test 2 engine BHP value should be nominally = or > than 4075Hp. Load regulator function should be at approximately 90%. 10-18 GT46MAC Locomotive Service Manual

0 4. If load testing at elevation higher than 5000 feet above sea level, computer may act to reduce engine output to level lower than nominal BHP value specified in table. Under these conditions, locomotive computer turbo speed limit routine and/ or barometric compensation routine may limit main generator output to level lower than listed in Note 1 or Note 2.

A.A.R. STANDARD CONDITIONS FOR LOAD TESTING

Condition

Value

Ambient Engine Air Inlet Temperature

15.5°C (60°F)

Barometer Reading (NOT Corrected to Sea Level)

28.86 In. Hg.

Fuel Oil Specific Gravity at 15.5°C (60°F)

0.845

Fuel Temperature

15.5°C (60°F)

Note: Correction Factor Charts, next page, are used to adjust the sum of observed generator horsepower plus auxiliary horsepower to A.A.R. standard load test conditions for calculating engine BHP.

LT 2 time 5:00

Load Test Thr Pos EngShHP MG A Bar Prs

8 3938 1060 28

Eng RPM TPU RPM MG V TM AirF

903 18.0 2596 79

LR %Max KW Ref KW Fbk MGfld A

100 2755 2751 93

Figure 10-2.Typical Load Test 1 Result.

Load Test Thr Pos EngShHP MG A Bar Prs

8 4175 1091 28

Eng RPM TPU RPM MG V TM AirF

LT 2 time 4:49 903 18.6 2678 79

LR %Max KW Ref KW Fbk MGfld A

94 2928 2923 105

Figure 10-3.Typical Load Test 2 Results.


CORRECTION FACTOR CHARTS FOR EMD MODEL 16-710G3B ENGINES The charts below are provided for the purpose of correcting observed Model 16-710G3B engine load test horsepower levels for A.A.R. standard conditions.

LT31070

Figure 10-4. Model 16-710G3B Engine Load Test Correction Factor Charts


0

SECTION 11. HIGH POTENTIAL TESTING Locomotive electrical circuits and equipment are sufficiently insulated to withstand potentials far in excess of those experienced in normal operation. This insulation dielectric strength should, however, be periodically checked to verify that this margin of safety remains in existence. High potential tests provide the means for making this check. During high potential testing, wiring and equipment are subject to higher than normal voltages. These potentials are applied for specified periods of time. For the circuit to qualify, there must be no breakdown of insulation to ground. The dielectric strength of the insulation is then considered satisfactory. On the other hand, a breakdown to ground indicates the need for improved insulation on the circuit or device tested.

TEST EQUIPMENT It is very important to use a reliable high potential testing machine. The machine should be in verified good condition so that adequate tests can be made safely, without unnecessarily overstressing insulation during testing. The machine to be used for high potential testing should have the following characteristics: •

Wave Form The voltages specified for high potential testing are root-mean-square voltages, and the wave form should have a limit of 5% third harmonic. This limitation fixes the peak voltage for any RMS voltage. The wave form may be influenced by the capacity of the testing apparatus relative to the size of the equipment being tested.

•

Surges The means employed to change voltage on the primary must be such that harmful surges do NOT occur.

•

Regulation The secondary voltage drop should NOT exceed 20% under actual test conditions.

SAFETY PRECAUTIONS WARNING MAKE CERTAIN THAT ALL SAFETY PRECAUTIONS THAT ARE UNIQUE TO THIS LOCOMOTIVE ARE FOLLOWED--Refer to SAFETY PRECAUTIONS FOR GT46MAC LOCOMOTIVE in Appendix C. •

Make certain that equipment and circuits meet the qualifications described in INSULATION RESISTANCE TEST on page 11-7 following before performing high potential tests.

HIGH POTENTIAL TESTING 11-1

•

Whenever possible, high potential tests should be performed by one man. All others should be kept off the locomotive and away from the test area.

•

A thorough knowledge of the circuits, equipment, and procedures involved is essential. Extreme care should be taken to make certain that tests are properly made.

•

To prevent dangerous overvoltage surges, test electrodes must be firmly connected to the circuit or item before the voltage is applied. Similarly, the voltage should be removed before the electrodes are removed.

•

After the tester has been removed from the item being tested, clear the item of possible residual voltage by discharging it to ground with a suitable insulated conductor.

MEGGER/HI-POT/WELDING PRECAUTIONS During testing or rework procedures steps must be taken to protect both EMD and vendor applied electronics from hi-pot or welding induced voltages. EMD recommends isolation of the microprocessor control system from the unit during high-potential testing or arc welding operations.

LOCOMOTIVE WELDING PREPARATIONS FOR GT46MAC REQUIRED EQUIPMENT •

Siemens key

•

9/16” socket and ratchet

•

9/16” wrench

•

Slot screwdriver for modules

•

Nut driver for TB32

•

Grounding cables and rod

•

Safety signs for handrails and cable tie-wraps

•

Anti-static bags

NORMAL DISCHARGE PROCEDURE 1. Cut in both trucks. Ensure ground relay cut-out switch is closed. 2. Engine is running. (If not, proceed to step 7). 3. From the MAIN MENU select SELF TEST, and then DCL SHORTING TEST. 4. Place the Isolation switch in ISOLATE. Run the DCL SHORTING TEST. 5. Confirm the DC link capacitor voltages ramp up and decay back to zero. 6. Shut down the engine. 11-2 GT46MAC Locomotive Service Manual

0 7. Leave the isolation switch in ISOLATE. 8. Cable tie-wrap the engine start switch closed. 9. If DC link shorting test passed, then proceed to “BASIC LOCOMOTIVE”. If DC link shorting test failed, then stop and refer to Safety Precautions for GT46MAC locomotives in Appendix C.

BASIC LOCOMOTIVE 1. Apply the 3-way grounding jumpers (Ground terminal first) and place an orange safety sign on the handrail on each side of the unit. 2. Open all circuit breakers. Open battery knife switch. Disconnect BTP and BTN from batteries stand off insulators. 3. Disengage the circuit modules from the chassis. Use proper anti-static procedures. Store in anti-static bags as required. REMOVE MODULES ADA305 - slot 7 CPU302 - slot 8 MEM300 - slot 9 COM301 - slot 11 DIO300 - slot 3 DIO300 - slot 2 DIO300 - slot 1 PSM300 PSM310 PSM320 PRG301 DISCONNECT THE FOLLOWING MODULES FCD300 DVR300 FCF300 ASC300 TLF300 3.5 Disconnect GSX from VDCL-HT(+) and GNX6 from VDCL-HT(-). Short the leads together and isolate.


SIEMENS EQUIPMENT Remove all front panel connections on both SIBAS computers. (Use proper antistatic procedures).

KNORR EQUIPMENT Disconnect power inputs (plug VCJ1): at the VCU

RADAR Disconnect radar plugs at radar head.

SECURE LOCOMOTIVE Chock the wheels and apply the handbrake. Drain the main reservoirs from the auto drain valves.


0

REAPPLICATION OF ELECTRONIC EQUIPMENT 1. Reapply the equipment in reverse order to the disarming procedure, as follows: A. Reapply radar plug to radar head. B. Knorr equipment - Reapply power input plug VCJ1. C. Siemens equipment - Reapply all front panel connections on SIBAS. (Use proper anti-static procedures). D. VDCL sensor - Remove short and reapply GSX, GNX. E. Reconnect panel mount modules. F. Reapply chassis mount modules using proper anti-static procedures. Reconnect the battery leads. G. Close the auto drain valves on the reservoirs. H. Remove the 3-way grounding jumper from both TCC cabinets. Remove the safety signs from each handrail and return them to the equipment room. Close the battery knife switch. Close all circuit breakers. 2. Recheck all fluid levels. (Top up as required). 3. Remove cable tie-wrap from engine start switch. 4. Restart engine as per normal procedure.

HI-POT/WELDING PRECAUTIONS (MODULE ISOLATION) NOTE In the following text, unless specifically required for test purposes, all circuit breakers and the battery knife switch should be opened to prevent incidental current return paths. Isolation of microprocessor systems on the GT46MAC locomotives involves several steps that may increase reliability. These steps are given as follows: 1. Open all circuit breakers and battery knife switch. 2. Remove all chassis mounted modules (CPU, MEM, ADA, DIO and COM). 3. Remove all power supplies ((PSM300, 310, 320) as well as PRG301. 4. Remove all panel mounted modules (FCF, FCD, TLF, DVR, ASC). 5. Replace TCC plugs Xa. Xg with plug shorting assembly (not “octopus”). Isolation of the modules is not intended to include removal of the rear motherboard connections on the EM2000 chassis. Also, with the circuit modules removed, active feedback transducers need not be disconnected unless risk of physical damage is eminent.


EMD currently recommends not using AC hi-pot equipment in high potential testing. These devices are normally used as a destructive test to break down any remaining insulation where leakage current may have been escaping. Once the power on the machine was cranked up, the electrician would “go look for the smoke.” Due to the nature of this type of testing and the fact that it may create further damage or “wound” devices, and damage Main Generator fields during operation, AC hi-pots should not be used. NOTE Electro-Motive does recommend the use of megger equipment in locating grounds.

INSULATION RESISTANCE TEST Before making any high potential tests, insulation resistance to ground should be checked using a 500 volt DC megohmmeter. A reading of one megohm or more indicates satisfactory insulation resistance. Do NOT perform high potential tests if insulation resistance readings are less than one megohm. The megohmmeter readings are most useful when compared to previous readings. Therefore all insulation resistance readings should be recorded in a locomotive maintenance log. Readings of less than one megohm should be viewed with suspicion because applying a high potential test in such instances may cause a breakdown of the insulation. To reduce the risk of this possibility, the cause of low megohmmeter readings should be determined and corrected. This may be done by reducing the complete circuit concerned into individual circuits which are then isolated and checked separately. In this way, the circuit portion or equipment causing the low reading can be found. Correction may often be made by thorough cleaning and drying of the affected areas. Before starting tests, all circuits containing electronic components such as transistors and silicon rectifiers must be disconnected or shorted during the tests. Use the following steps as a guideline for determining what equipment should be protected: 1. Open main battery knife switch. 2. Open ground relay cutout switch. 3. Place all circuit breakers in the ON position. 4. Disconnect all receptacle plugs at the rear of the computer chassis. The ribbon cables between chassis do NOT have to be removed. Disconnect the +74 VDC input wires from the power supplies. 5. Remove ground connection to computer chassis receptacles by disconnecting the wire GRD1 that connect to chassis ground from the 15 volt ground bus. 6. Remove three radar transceiver mounting bolts. Loosen transceiver, then disconnect the electrical connector. 7. At main generator terminal board, short out the main generator current transformers by connecting jumpers between wires CTA, CTB, and CTC. 8. At battery charging assembly BC ASM, jumper the “DC+” terminal to the “DC−” terminal, and jumper the red terminal to the black terminal of the suppression rectifier. (The suppression rectifier is mounted on the side of BC ASM, near the “DC+” and “DC−” bus bars.)


0 9. At the SCR assembly, jumper AC1 to AC2, AC2 to AC3, AC3 to negative bus, negative bus to positive bus, and positive bus to DC+. 10. At the main generator output, jumper all positive and negative buses together. 11. Disconnect or jumper out any electronic equipment such as radio, train control, speed indicator, etc.


HIGH POTENTIAL TEST If practical, perform the high potential test as soon as possible after the locomotive has completed a run. At that time, locomotive equipment should be warm and dry. (Moisture may accumulate on the equipment during extended idling or shutdown periods.) CAUTION Perform an insulation resistance check before the running the high potential test. Refer to INSULATION RESISTANCE TEST on page 11-7.

CIRCUITS TO BE TESTED To comply with established regulations, it may be necessary to perform high potential tests on the locomotive high voltage direct current (DC), and alternating current (AC) circuits. See the following text for details. •

High voltage direct current (DC) circuits High voltage DC circuits include all equipment and wiring connected to the main generator output, plus dynamic brake grid resistors and circuits.

•

High voltage alternating current (AC) circuits AC circuits include the companion alternator, cooling fans, inertial filter blower motor, TCC’s blower motor, TCC electronic blower, transformers, excitation equipment, and associated wiring.

•

Low voltage (DC) circuits Low voltage DC circuits include all control equipment, and wiring connected to the locomotive auxiliary generator and storage battery. Although high potential tests are NOT required for low voltage DC circuits and equipment, it is good practice to check insulation resistance. NOTE The Traction Control Converters (TCCs) are Hypotted at the factory and never need additional testing. The 5 power connections at the base of the TCC are disconnected and the traction motor circuit is Hypotted to 3000 VDC to ground. Similarly, the main generator/HVC circuit is Hypotted at 3000 VDC to ground, as well as the DB grid/motor circuit. Afterwards, the TCCs are reconnected and at that point the power connections are heat shrunk down.

TEST PROCEDURE When preparations are completed, perform the high potential test as follows: 1. Test high voltage DC circuits: 2. Ground the low voltage (74 volt circuit) circuits and companion alternator. Perform high potential tests on high voltage DC circuits and equipment as outlined in Steps 3 through 12. Refer to the locomotive schematic diagram. Do NOT perform high potential tests on starting motors. 3. Test high voltage AC circuits: 4. Remove means of grounding companion alternator installed in Step 1. Ground main generator output. Perform high potential tests on high voltage AC circuits and equipment as outlined in Steps 3 through 12. 11-8 GT46MAC Locomotive Service Manual

0 5. Make certain that tester is NOT connected to power supply, that control knob is set at zero (0), and that control switch is OFF. 6. Connect one electrode firmly to insulated conductor of circuit being tested. Refer to wiring diagram for suitable connection point. 7. Connect the other electrode firmly to ground conductor such as locomotive underframe. 8. Make certain that circuits other than the one being tested have been isolated and grounded. 9. Connect high potential tester to power supply and turn control switch ON. 10. Press ON button firmly down, and while holding in this position, slowly turn control knob to specified test voltage. Refer to Service Data page, at end of this section, for test voltages. 11. After applying specified voltage for required period of time, and while holding ON button down, slowly turn control knob back to zero (0). 12. Release ON button and turn control switch OFF. 13. Discharge tested circuit to ground before removing electrodes. 14. Repeat the preceding tests for other circuits involved in the test. When tests are completed, remove all shorting and grounding jumpers. Use preceding test procedure as a checklist to make sure that all jumpers have been removed. Return controls and switches to normal standby condition.


SERVICE DATA - HIGH POTENTIAL TESTING FOR LOCOMOTIVES CIRCUIT:

TEST

High Voltage DC Circuits:

1050 Volts RMS for 1 minute; 330 milliamperes maximum output current.

Alternating Current AC Circuits:

400 Volts RMS for 1 minute.

Low Voltage DC Circuits:

Megohmmeter test only. (500 Volt DC maximum.)


0

SECTION 12A. TROUBLESHOOTING TIPS This section is intended to serve as a basic guide for troubleshooting an GT46MAC locomotive. Other more comprehensive procedures have been incorporated into EMD Training Manuals and Maintenance Programs.

GROUND RELAY PROCEDURES 1. Run the excitation self test. 2. Self load at TH8 1 and 2. 3. Stall test with one truck cut out at a time. A. If excitation test will not pass, then the problem is probably between the main generator and the inverter. B. If the unit will not stall test with a truck cut in, then problem is between the inverter and the traction motors. C. For meggering, you must follow the welding disconnect rules, center the switchgear, and disable the ground relay cut out. D. If the ground relay is found with a stall test, the unit will need to come inside to disconnect the traction motors for meggering. The traction motors are hooked together in parallel from the inverter so you cannot isolate to one motor unless you megger at each individual motor.

GENERATOR FIELD OVER-EXCITATION FAULTS 1. Run the excitation self test. 2. Run the contactor self test to verify all is correct. 3. Swap DIO modules to see if the problem goes away. 4. Start qualifying the excitation computer circuit: companion alternator, FCF, ADA, CPU, and FCD modules, SCR, MG field.

HOT ENGINE, THROTTLE 6 LIMIT: NOTE: Verify that a true hot engine condition does not exist. 1. At the dispay, select cooling system, check temperature readings from ETP1-ETP2. They should be within a couple of degrees difference. 2. If there is a large difference between the probe readings swap probes connections. 3. If readings are also swapped on the display screen, pull out ETP1 and ETP2 to compare resistnce value (refer to ETP1-2 resistance table in Section 8). 4. If readings did not move on the display, change ADA module. 5. If readings are still out of range, check wiring and connections. TROUBLESHOOTING TIPS 12A-1

KNORR SET UP TO SUPPRESS ALERTER FUNCTIONS 1. Set unit to LEAD /CUT-IN. 2. Apply independent brake to FULL. 3. Move automatic handle to SUP (suppression). 4. Release independent brake. 5. Actuate (bail) off automatic brake setting.

TCC OVERVOLTAGE FAULTS 1. Look at data packs to determine if faults occured in power or dynamic brake. 2. Faults in dynamic brake are due to hardware difficulties and a computer control reset is the only solution until the damping resistor modification has been performed. 3. Faults in power have a few different causes. Check for radar speed fluctuations in data packs. An example would be 26 KPH two seconds before fault, 0 at one second before fault, and 26 KPH again at time of fault. 4. Run the radar self test and troubleshoot circuit if test fails.

NO COMPANION ALTENATOR OUTPUT 1. Check the DVR test points to ensure the aux gen is supplying power for the companion altenator field. 2. Visually inspect cabling from aux gen. 3. Check the test points in the circuit breaker cabinet to see if the companion alternator is putting out voltage. 4. Check the slip rings and the main generator terminal board in the bottom of the generator for loose or broken wires. 5. Start qualifying the excitation circuit: CA-FCF-ADA-CPU-FCD-SCRMG field. NOTES

The excitation test will often dEtermine in which direction you need to pursue the problem, either towards the generator or the computer.

CHECK FOR SLIPPED PINION 1. Make a full set on the air system. 2. Go to throttle 1 or 2 stall test. 3. Check under creep control screen for TMRPMs. If all show 0 except one, then that pinion is slipping.

12A-2 GT46MAC Locomotive Service Manual

0 4. The following steps need to be followed to avoid constant wheel slip with a slipped pinion: A. Disable the TCC with the defective traction motor pinion. B. Disable the locked wheel detection on that axle under the locked wheel detection screen.

DIO 300 CARDS The DIO 300 card is basically an input/output card that serves a couple of different functions. One function of the card is to pick up an internal channel so that a negative string can be supplied to a relay or interlock. Another function is to receive an input signal as a return to verify that a relay or interlock has been picked up. A problem with troubleshooting a DIO module is that the unit will often not "recognize" that there is a problem - rather they may be "odd" occurrences that cannot be explained, such as; throttle 1 power all of the time no matter what is done. An easy test for a bad DIO is to swap the two modules around and see if the problem "moves" or "goes away". IMPORTANT Check circuits with diodes in them before swapping modules to ensure that the second module does not get damaged. Sanding Magnet Valves are an example of this. Document the exact type of fault that is occuring so that repair of the module will be easier when it is sent back on warranty.

ADA 305 MODULE The ADA module is an analog to digital to analog converter module. This module receives all feedbacks that are an analog signal such as temperature and speed and converts them to a signal that the CPU can understand. If there are similiar inputs, such as TCC1A and TCC2A, swap the feedback wiring at the appropriate PDPplug. If the screen value swaps, the problem is the sensor. If the screen value does not swap the problem is the ADA.

EM2000 COMPUTER IS DOWN 1. If all 3 PSMs have red LEDs: A. Reset computer control circuit breaker. B. Open the COMPUTER CONTROL circuit breaker and pull 1 PSM and power back up to see if other 2 PSMs come back to green. When you find the PSM that allows the other two to come up, the problem is either that PSM or in that circuit. C. If no pulled PSM module allows for the other two to come up, then try a new PRG module. 2. If the PSM 320 (15V circuit) is the problem, try a new PSM 320. If not, then disconnect the following items one at a time (with the circuit breaker open [down] each time) to track down the problem: FCF, ASC, plug 22A, 22B. Plugs 22A and 22B go down to the power distribution panels in the bottom center door of the high voltage cabinet.

TROUBLESHOOTING TIPS 12A-3

3. If PSM 300 or 310 circuits are the problem, try the new PSM first. These two modules directly power the EM2000 by way of the copper ribbon cables off the back of the power chassis. Check for bad/shorted cables or a bad EM2000 module. 4. A defective PRG 300 module generally shows itself in one of four ways: 1) No power will be delivered to any of the PSM modules, 2) The input fault light will be ON, 3) The output fault light will be ON, 4) The PSMs will come up "green" with a breaker reset but will "drop out" when the engine is cranked. NOTE Verify power to the PRG by removing the plug to the back of the module and checking the voltage at the plug. 5. A fault light that stays on, on any of the EM2000 modules, indicates that the module is defective. 6. If all fault lights on the EM2000 modules are ON, then the problem is probably a MEM 300 or CPU 300 module. A defective MEM card can be confirmed by loss of running totals, programmable meters, date, time, archive information, etc. A CPU fault is more difficult to locate and is generally a "try and see" module. Make certain that the software on the CPU is the same or compatible before swapping modules.

12A-4 GT46MAC Locomotive Service Manual

0

SECTION 12B. EM2000 AND TRACTION COMPUTER DOWNLOADS INTRODUCTION Information shown on the display of the EM2000, such as fault archives and operating data, can be sent from the CPU to a remote device such as a dot matrix printer or a lap-top computer. This data can be used in fault diagnosis and observation of the locomotive's performance, and problem tracking during operation in revenue service.

Download Procedure Figure 12B-1 shows the interface cable used to connect the portable laptop to the EM2000, Traction Computer (TC) and HVAC computers. Attach the 9 pin connector to the lap-top and the 15 pin connector to the CPU302 module serial port on the faceplate of the module. This connection can be made with the locomotive computer on. Figure 7.2 shows the 9 pin connector hooked up to the lap-top and Figure 7.3 shows the 15 pin connector hooked up to the CPU302.Turn on the lap-top.

Figure 12B-1 Download Interface Cable The Hard Disk Manager screen should come up after the PC has loaded the installed software from the hard disk.

Figure 12B-2 Computer Serial Port Connections.

EM2000 AND TRACTION COMPUTER DOWNLOADS 12B-1

Figure 12B-3 CPU302 Connection to Lap-Top. In order to communicate with the EM2000, some type of communications software needs to be loaded (turned on). From a DOS prompt on your lap-top, type the proper command to begin the communications program as specified in the software manual. The communications program should now be up and running. If it is not, consult the software user's manual that came along with the communications package for start up instructions before moving on. With the communications program running, the next thing to do is choose a preset configuration. A configuration is simply a set of communication parameters such as baud rate, parity, stop bits, etc. Choosing a configuration is faster and easier than setting all of the communication parameters each time the program is run. If a configuration for EM2000 communication already exists, proceed to the next section called "Inside the Brain of the EM2000." If a configuration does not exist, create one with the following parameters:

12B-2


0

COMMUNICATIONS PARAMETERS: Communication Line:

Com Port 1 (serial port)

Terminal Type:

T 100

Baud Rate:

9600 These are

Maximum Transmit Rate:

Unlimited

Bits/Character-Parity:

8/none

Stop Bits:

1 bit

Auto XON/OFF:

256 chars

Disconnect on Exit:

Yes

Disconnect Duration:

2 sec.

Display Parity Error:

Yes

Online/Local:

Online

Local Echo:

Disable

These are critical !

INSIDE THE BRAIN OF THE EM2000... Once the proper configuration has been selected, the screen should go blank. The lap-top computer is now just a terminal with no brains. It is only an extension of the CPU in the EM2000. The EM2000 does not yet know that the terminal exists. Pressing the ENTER key, will send the EM2000 a wake up call and cause it to answer back with the following prompt: 16 > The PC and CPU302 are now capable of communicating to each other, and the 16> prompt is the EM2000's way of asking the PC what it wants. In order to download or save data, the PC must be set to what is commonly called the "capture" mode. Consult the user's manual for procedures on entering the capture mode. The next thing to do is give specify a file name for the information about to be received. If downloading is a regular practice on EM2000 equipped units, some sort of code name including date and road number for the file is suggested. For example, if taking information from a GT46MAC unit with the road number 9403 on December 27, the following code could be used:

94031227.XX 9403 12 27

Road Number

Month

.XX

Date

Rail Road Name (ex. Indian Railway


Notice that the year will not fit into the allowed 8 characters for a file name. For this reason, disks should only be used to store data from a particular year. When the communications package asks for the file name to save the information under, type a:\94031227.XX (a: tells the PC which disk drive to write the file to). Once the capture mode has been activated and a file name assigned, the screen showing the 16 > prompt will show again. At this time, select the desired screen on the EM2000 (such as Fault Archives, Running Totals, or Data Meters) and press the appropriate key (usually the PRINT key) at the bottom of the EM2000 display. If the entire Fault Archive is sent, the information should be seen scrolling by on the PC screen as it is recorded. If only a particular fault is sent, the information seen on the EM2000 will then be displayed on the PC screen and recorded. If attempting to record particular conditions from a Data Meter during locomotive operation, data is sent to the PC at the instant the PRINT key on the EM2000 display is pressed. Information will be recorded in the same file each time the PRINT key of the EM2000 display is pressed until the capture mode is closed. Upon completion of data acquisition, the file must be closed. This is done automatically when exiting the capture mode. If the communication link between the EM2000 and the PC becomes interrupted at any time, the file will not be closed and information gathered will be lost. This does not terminate the communication capabilities between the PC and the EM2000 locomotive computer. As long as there is the 16 > prompt appearing on the PC screen, Archive Faults, and Data Meter Screens can be sent to the PC. The important point is that data appearing on the PC sent by the EM2000 will be recorded only if the PC communication software is in its capture mode.

NOTE The EMD Monitor allows the user to monitor signal values, contactor/relay states, and system statuses that may or may not appear in data meters. This information will not be covered in detail here. See your EMD District Engineer for more help.

DIAGNOSING DOWNLOAD PROBLEMS In the event the PC does not seem to properly communicate with the EM2000, the following action should be taken:

12B-4

•

Verify the steps have been followed as stated above.

•

Check that the interface cable has not become loose.

•

Try to determine if the battery or PC power is sufficient (some last less than 20 minutes).

•

Verify the communication set-up (parameters).


0

MISCELLANEOUS INFORMATION To verify file creation/contents: (if file was saved on A: drive) •

Return the PC to the DOS prompt (C:\).

•

At the prompt enter the following: A:\ (this puts the user in the correct disk drive).

•

At the prompt enter: DIR. This will scroll contents of the floppy disk across the screen. Watch for the name of the file just created. Hit S while holding the ALT key down to stop information as it scrolls by. Hit any key to resume scrolling.

•

To print a file, at the A:\ prompt enter: copy Filename. Ext prn (this will send the file to a printer).

INTERCONNECT CABLE WIRING Below are the connections required for communication between a PC and the EM2000.

Figure 12B-4 Communications Cable Schematic. Note that the "9F" in DB9F on the left hand side of the chart indicates a 9 pin female connector. Similarly, on the right hand side of the diagram, the use of a 15 pin male connector is shown. Most serial port for communication on the back side of PCs will use this type of connector. A standard 9 to 15 pin connector will not work for EM2000 communications because pins 2 & 3 of the standard connector run straight through the cable. EM2000 requires that pins 2 & 3 cross! However, rather than creating customized cables, a null modem adapter may be used with the standard 9 to 15 pin cable for EM2000 communications.


TRACTION COMPUTER COMMUNICATIONS A laptop computer can be used to interface with the Traction Computers in much the same way as with the EM2000. The laptop provides access to information stored in the fault archives, makes the dynamic monitoring of Traction Computer feedback signals possible, allows for validation of RS-485 serial link data exchange, and provides several self test functions. The content of this text, however, does not extend beyond the common uses of the laptop for fault data access and self tests.

SET-UP The cable used for the communication link between the laptop and the RS-232 interface plug on the locomotive is the same style as that used for EM2000 communication, however, pin configurations do not match! In other words, the EM2000 interface cable crosses a few wires before making connection at the opposite end. The Traction Computer communication cable is a standard DB 9F to 15M pin cable that may be easily found on the market. As mentioned earlier, the same cable may be used in either application by making use of a null modem adapter. Connections from the laptop to the RS-232 plug are the same as demonstrated by Figures 7.1 - 7.3. The 15 pin connector, in this case, should be applied to the respective RS-232 interface found on the panel above the PRG. Figure 7.5 shows the location of these plugs. One plug is used for HVAC communications, while the other two are used for TCC #1 & TCC #2 links, respectively. Begin the communications program on your lap-top computer. Set all communication parameters such as baud rate, etc. according to the specifications spelled out for EM2000 communications in this module. Additionally, the “CAPS LOCK” key must be engaged in order for the TC to understand the requests typed in by the user!

Figure 12B-5 RS-232 plugs for TCC’s and Air Brake Computers

12B-6


0

INSIDE THE BRAIN OF TRACTION COMPUTER... Once the proper configurations in the communications software of the laptop computer have been selected, the screen of the laptop should go blank. At this point, the laptop computer is only a “terminal” of the Traction computer. But, the TC does not yet know that this “terminal” exists. Pressing the ENTER key will send a wake up call to the TC, and the Traction Computer will instantly respond with the following prompt: (an asterisk)

* From this point, the laptop can be used to enter many different commands to achieve certain duties.

TRACTION COMPUTER COMMUNICATION COMMANDS When the initial * prompt on the laptop is seen, the user can enter two different modes. 1. Fault Data Analysis 2. Test Mode. To enter the fault analysis section, type “F”, and the laptop automatically enters the letters FA standing for Fault Archive. Follow these letters with the ENTER key. To enter the test mode, type “T” from the * prompt, and the ENTER key. In either case, the asterisk * will change to a new prompt when either of these modes is opened. The listing on the following page gives the commands for each of the two modes. Keep in mind that the commands are abbreviations for German phrases and in some cases the English translations may not begin with the same letters.

TEST MODE To see commands in either mode, type H for help. Command AD DA FC GP HC IP LV ME RS SC ST TE VP ; Cxx EX

*& * & * *&

*

*

Stands for... Analog to Digital Digital to Analog Fault Code Gate Pulses Hard Crowbar Current (I) Protection Link Voltage Message RS-485 Soft Crowbar Statistics Temperature Voltage Protection NA Continuous Exit

Function Test A to D Converter Input Test D to A Converter Output Send Simulated Fault to LCC Generate Firing Pulses for GU test Fire Hard Crowbar Test Current Protection Levels Display DC-Link Voltage Message PCB C011 Display RS 485-Telegram Fire Soft Crowbar Display Protection Statistics Display Chart of Temperatures Test Voltage Protection Levels Repeats Previous Command Continuous Display of xx Command Exit Test Program

* Command protected by password. & To exit from these tests, the TCC computer must be rebooted! EM2000 AND TRACTION COMPUTER DOWNLOADS 12B-7

FAULT ANALYSIS

Command EA EB EC ED EF EL ES ET EW

Stands for... NA NA Error Complete Error Delete NA Error Last Error Short NA Error Wait

Function Display Error in Memory, Location XXX Snapshot Stored on Request Display all Errors (Long Version) Delete Errors in Archive Search TCC history for fault code XX Display most recent Error Recorded Display all Errors (Short Version Display all possible Error Codes Wait for Error to occur, then display it

EXPLANATION OF THE COMMANDS T - Test The test mode can be entered from the asterisk * prompt by using this command. The prompt will note that the test mode is active by changing to TEST>. From this point, any of the test commands may be used. AD - Analog to Digital Can be used to check the Analog to Digital conversion facilities of the Traction Computer. DA - Digital to Analog Can be used to check the Digital to Analog conversion facilities of the Traction Computer. This is not useful since the D to A capabilities of the Traction Computer are not utilized in this application. FC - Fault Code This command sends a fault code, specified by the user, to EM2000. It is useful to determine if the EM2000 reacts to certain TCC faults in the proper fashion. GP - Gate Pulses The Gate Units can be checked to verify their operation/connection to the TC by using this command. When executed, the LEDs on the GU should flicker if the GU passes the test. In order to exit this test, power to the TC must be interrupted to cause a reboot! HC - Hard Crowbar Functionality of the hard crowbar may be checked by using this command. To further verify the operation of the device, execute the test with a charged DC Link. Protected by password! IP - Current Protection When given this command, the TCC simulates a condition in which output phase current exceeds maximum allowable limits. The protection system will perform counter measures as if the condition were real. 12B-8


0 LV - Link Voltage Displays "snapshot" DC Link Voltage as measured by the transducer of that TCC. In other words, the value on the screen is not dynamically updated! ME - Message Used in Siemens manufacturing facility quality assurance to simulate a locomotive. RS - RS-485 Serial Link The user may use this command to view the "telegrams" sent back and forth on the serial link. This is useful when used in conjunction with EM2000 screens to determine if communication between the two systems is complete. SC - Soft Crowbar Functionality of the soft crowbar may be checked by using this command. To further verify the operation of the device, execute the test with a charged DC Link. Protected by password! ST - Statistics Archive Each time a crowbar fires or a component exceeds its maximum allowable temperature, the event is recorded in a statistics portion of the Traction Computer memory. This archive portion may be viewed using this command. TE - Temperature Statistics All temperatures monitored by the Traction Computer are stored in a separate portion of memory. The data is displayed in a table format. VP - Voltage Protection When given this command, the TCC simulates a condition in which DC Link Voltage exceeds maximum allowable limits. The protection system will perform counter measures as if the condition were real. Cxx - Continuous xx If desired, DC Link Voltage at that TCC may be measured on a continuous basis by using the CLV command. FA - Fault Archive Data stored in the fault archive of the Traction computer can be accessed by using this command. Once the Fault Archive is entered, the prompt reflects this situation by changing from the asterisk * to FAULT ARCHIVE>. At this point, any of the fault archive commands may be used. EA - Error by Memory Address This is useful if multiple faults exist in the Archive, but viewing only a certain fault is desired by the user. The user will be prompted for the memory address of the fault. This information may be obtained using the ES command and noting the ERROR VECTOR.


EB - Snapshot Stored on Request Each time a fault is logged, the Traction Computer records a set of data to accompany the fault. The TC is not as selective about which signals to record as the EM2000 is. Rather, all possible data is recorded with each and every fault. Using the EB command will take a snapshot of the data that would normally be recorded in the instance of a fault. This snapshot is then logged into memory and given the fault title, “SNAPSHOT STORED ON REQUEST.” ED - Error Delete This command erases all data presently stored in the Traction Computer fault archives. Once erased, this information cannot be recovered as a set. The fault data is actually moved to another portion of memory which can be accessed only by using the EF command with a particular fault code. EF - Search for Error Code When using the ED command, the fault data is not removed from memory permanently. The data actually moves to another area which is not easily accessed. There, the data remains until the memory becomes full, at which time data is overwritten on a "first-in-first-out" basis. To access data in this area, the user selects a particular fault code. The Traction Computer then reports all occurrences of the specified fault since the TCC had been placed in service. EL - Error Last This displays the latest fault recorded in long form (with all data). ET - Display all possible codes This command displays all possible fault codes and their meanings. EW - Error Wait The Traction Computer waits for any fault to occur, at which time the error is displayed in long form automatically on the laptop. ES - Error Short The fault data stored in the archives may be viewed in one of two formats. The ES command displays the faults with no data attached. An example of this listing is shown here.

*^ * FA^ >> T C C 1 << FAULT - ARCHIVE FAULT-ARCHIVE > ES^ —————————————————————————————— INDIAN RAILWAY 9430 TIME IN: 03/16/94 14:33:24 TIME OUT: 03/16/94 14:33:24 ERROR VECTOR = 3000 12B-10


0 ERROR CODE = FB AMOUNT OF ERRORS = 2 TCC1: SNAPSHOT STORED ON REQUEST —————————————————————————————— INDIAN RAILWAY 9430 TIME IN: 03/16/94 14:35:22 TIME OUT: 03/16/94 14:35:22 ERROR VECTOR = 30A0 ERROR CODE = FB AMOUNT OF ERRORS = 2 TCC1: SNAPSHOT STORED ON REQUEST Each fault displays only the header of the fault data which includes the following information: •

Road Number

•

Time of recording

•

Error Vector (Location in memory)

•

Error code (also shown on Digital Interface module)

•

Tally of particular fault stored

•

Fault description

EC - Error Complete The fault data stored in the archives may be viewed in one of two formats. The EC command displays the faults with all data attached. An example of this listing is shown here. FAULT-ARCHIVE > EC^ —————————————————————————————— INDIAN RAILWAY 9430 TIME IN: 03/16/94 14:33:24 TIME OUT: 03/16/94 14:33:24 ERROR VECTOR = 3000 ERROR CODE = FB AMOUNT OF ERRORS = 2 TCC1: SNAPSHOT STORED ON REQUEST

FAULT CODE LCC

= .................. 0000 0000 0000 0000 0000 H

ADDRESS CS

= ..................1100 1011 1111 1111 CBFF H

ADDRESS IP

= ..................0010 0110 0000 1110 260E H EM2000 AND TRACTION COMPUTER DOWNLOADS 12B-11

ZW1R

= ................. 0010 1010 0010 0001 2A21 H

ZW2R

= ................. 0000 0000 0001 1111 001F H

ZW3R

= ................. 0010 0000 1000 0000 2080 H

ZW4R

= ................. 0000 0000 0000 0000 0000 H

ZWWRSS

= ................. 0000 0000 0000 0011 0003 H

SWM1R

= ................. 0000 0000 0010 1000 0028 H

SWM2R

= ................. 1000 0001 1001 1100 819C H

SWMWRSS

= ................. 0000 0000 1000 0010 0082 H

LW

= ................. 10000 0000 0000 0000 0000 H

LW2ALT

= ................. 0010 0000 1000 1101 208D H

LW2

= ................. 0010 0000 1100 1101 20CD H

LW3

= ................. 1110 0001 1101 0001 E1D1 H

LW4

= ................. 0000 0001 0110 0000 0160 H

LW5

= ................. 0001 0000 0000 0000 1000 H

LW6

= ................. 0000 0000 0000 0000 0000 H

LW7

= ................. 1000 0000 0000 0000 8000 H

ZB2UWS ZB1UWS

= ................. 0000 0000 0000 0000 0000 H

ZB4UWS ZB3UWS

= ................. 1001 0101 1001 0101 9595 H

ZB6UWS ZB5UWS

= ................. 1111 1111 1111 1111 FFFF H

ZB8UWS ZB7UWS

= ................. 0000 0000 0000 0000 0000 H

ZB10UWS ZB9UWS

= ................. 0000 0000 0000 0000 0000 H

ZB12UWS ZB11UWS

= ................. 0000 1000 0000 0000 0800 H

-

= ................. 0000 0000 0111 1111 007F H

SBUWS

PULSSYSTEM

= ................. 0000 0000 0010 0000 0020 H

PTRFANZ2 PTRFANZ1 = ................. 0000 0000 0000 0000 0000 H PTRFANZ4 PTRFANZ3 = ................. 0000 0000 0000 0110 0006 H PTRFANZ6 PTRFANZ5 = ................. 0000 1101 1100 1110 0DCE H P.C. MODUL NUMBER = ................. 0000 0000 0000 0110 0006 H P.C. TIME LIMIT

= ................. 0000 0000 0000 0000 0000 H

BUSY/TCC-ADDRESS/THROTTLE/GOVERNOR = ........... 2112 H

12B-12

TEMP. MOTOR 1 or 4

[0.1Deg. F]

= ............ 334

TEMP. MOTOR 2 or 5

[0.1Deg. F]

= ............ 338

TEMP. MOTOR 3 or 6

[0.1Deg. F]

= ............ 329


0 TEMP. MODULE 1 PHASE R [0.1Deg. F]

=.............263

TEMP. MODULE 2 PHASE S [0.1Deg. F]

=.............272

TEMP. MODULE 3 PHASE T [0.1Deg. F]

=.............272

TEMP. INVERTER CABINET [0.1Deg. F]

=.............354

TEMP. SNUBBER RESISTOR [0.1Deg. F]

=.............209

TEMP. TC

=.............473

[0.1Deg. F]

DC-LINK VOLTAGE

[Volts]

DC-LINK VOLTAGE OLD

=............. 877

[Volts]

=.............871

REF.VOLTAGE FOR INV.OUTPUT [V RMS]

=.............19

INV.FREQUENCY REFERENCE

[0.1Hz]

=.............0

INV.FREQUENCY FEEDBACK

[0.1Hz]

............... 0

MAGNETIC FLUX IN TM

[%]

...............59

TORQUE REFERENCE FROM LCC

[Nm]

=............1124

TORQUE REFERENCE LIMITED IN TCC [Nm] =.............1117 TORQUE REDUCTION DELTA n TORQUE REDUCTION dn/dt

[Nm] [Nm]

TORQUE FEEDBACK TO LCC

[Nm]

=............. 0 =............. 0 =.............1110

INVERTER CURRENT SYMMETRY OFFSET [A]=............. 9 INV. OUTPUT CURRENT PHASE R

[A]

=.............225

INV. OUTPUT CURRENT PHASE S

[A]

=.............2

INV. OUTPUT CURRENT PHASE T

[A]

=............. 233

INV. OUTPUT CURRENT PHASE R OLD [A]

=.............219

INV. OUTPUT CURRENT PHASE S OLD [A]

=.............6

INV. OUTPUT CURRENT PHASE T OLD [A]

=.............228

n + DELTA n REFERENCE SPEED

=.............113

[RPM]

UNFILTERED REFERENCE SPEED

[RPM]

FILTERED REFERENCE SPEED

[RPM]

=............. 113 =.............113

SPEED MOTOR 1 or 4

[RPM]

=.............0

SPEED MOTOR 2 or 5

[RPM]

=.............0

SPEED MOTOR 3 or 6

[RPM]

=.............0

SPEED FOR SUBPROCESSOR LOCOMOTIVE SPEED

[RPM]

[0.1MPH]

TIME BETW.COND.CHANGE - FAULT [0.1s]

=.............0 =............. 0 =............. 2602


Each fault lists with its header first followed by all data recorded along when the fault occurred. The top portion of the data is all digital information. The data contained here tells contactor statuses, power requests, etc. The data is expressed in both binary and hexadecimal format. The exact interpretation of this data can be obtained from your Siemens representative. As of the printing date of this publication, the interpretation information had not been translated to English. For troubleshooting purposes, this data will not be of much assistance in nearly all situations. The second portion of the data is all analog. This data is very helpful in diagnosing difficulties. The data provided is self-explanatory. The second portion of the data is all analog. This data is very helpful in diagnosing difficulties. The data provided is self-explanatory.

DOWNLOADING FAULT DATA To download information from the TC, the laptop computer must be used. A printer alone will not serve in this capacity as may be done with the EM2000. To download the data, enter the fault analysis mode using the commands discussed. Once the FAULT ARCHIVE> prompt is present, open a capture file as described in the previous text of this module. Be sure to give the file an appropriate name. Once the file has been opened, use either the ES or EC commands (depending on the depth of data required). As the data scrolls past on the screen, it is being recorded to memory on the laptop. Once all data has scrolled past, the user may either choose to record statistical data, or close the file. Be sure to close the file with the communications software, otherwise the data will be lost! Finally, after verifying that all data has been captured to the laptop computer, the data in the archives may be deleted.

INVERTER FAULT CODES

12B-14

00

RAM DATA LOST

02

INTERRUPT VECTORS IN DATA SECTION

03

INTERRUPT VECTORS IN STACK SECTION

04

TCC POWER SUPPLY FAILURE (NO 24 VDC FOR GTOS)

05

24 VDC POWER SUPPLY FOR GTOS TOO LOW

06

NO 24 VDC POWER SUPPLY FOR GTOS (INVERTER LOOP OPEN)

07

FIRING PULSE INTERRUPTED PCB G035

08

FIRING PULSE INTERRUPTED PCB G043

09

DC LINK OVERVOLTAGE (HARD CROWBAR FIRED BY BOD)

0A

HARD CROWBAR TRIGGERED BY ADJACENT INVERTER

0B

TCC FRONT CONNECTOR LOOP OPEN

0C

DC LINK OVERVOLTAGE (TOTAL LOCK)

0D

TCC HARDWARE WATCHDOG

0E

MEMORY-BATTERY < 2,8 V (BATTERY)

0F

DC LINK OVERVOLTAGE (SOFT CROWBAR)

10

SOFT CROWBAR TRIGGERED BY ADJACENT INVERTER


0 11

DC LINK UNDERVOLTAGE

12

DC LINK OVERVOLTAGE (SOFTWARE TOTAL LOCK)

13

INVERTER PROTECTION - REASON UNDEFINED

14

DC LINK OVERVOLTAGE (HARD CROWBAR)

15

GTO-MONITORING TCC

25

DIVISION FAULT

28

INVERTER OUTPUT VOLTAGE BETWEEN PHASES S AND T TOO LOW

29

INVERTER OUTPUT VOLTAGE BETWEEN PHASES T AND R TOO LOW

2C

FAULT MANAGEMENT OUT OF ORDER

2F

MAX. A/D-CONVERSION TIME EXCEEDED PCB C043

30

MAX. A/D-CONVERSION TIME EXCEEDED PCB C059

31

DIGITAL-ANALOG CONVERTER 1 OUT OF RANGE

33

DIGITAL-ANALOG CONVERTER 3 OUT OF RANGE

36

MISSING FEEDBACK BLOWER (FAST)

37

MISSING FEEDBACK BLOWER (SLOW)

38

INVERTER OUTPUT CURRENTS UNBALANCED

39

MISSING FEEDBACK IGV OPENED

3B

MISSING FEEDBACK TCC PHASE MODULE HEATER (LOW)

3C

MISSING FEEDBACK TCC PHASE MODULE HEATER (HIGH)

3D

MISSING FEEDBACK FROM 24 VDC GTO CONTACTOR

3E

SNUBBER RESISTOR TEMPERATURE LIMIT EXCEEDED

40

PHASE MODULE TEMPERATURE SENSOR FAULT

41

MOTOR TEMPERATURE SENSOR FAULT

42

PROGRAM LOGIC FAULT WHILE INVERTER OFF

43

PROGRAM LOGIC FAULT WHILE INVERTER ON

44

TC TEMPERATURE SENSOR FAULT

45


46

CAPACITOR TEMPERATURE SENSOR FAULT

47

SNUBBER RESISTOR TEMPERATURE SENSOR FAULT

48

TC OVERTEMPERATURE

49

TCC PHASE MODULE TEMPERATURE BELOW MINIMUM

4A

3 MOTOR TEMPERATURE SENSORS FAULT

4B

3 PHASE MODULE TEMPERATURE SENSORS FAULT

4D

PHASE MODULE TEMPERATURE LIMIT EXCEEDED

4E

MOTOR TEMPERATURE LIMIT EXCEEDED

4F

CAPACITOR TEMPERATURE LIMIT EXCEEDED

50

INTERNAL TCC ERROR EM2000 AND TRACTION COMPUTER DOWNLOADS 12B-15

12B-16

52

TCC FAN (24V) FAULT

54


61

BUSY ERROR SUBPROCESSOR

62

NO DATA TRANSMISSION FROM CPU TO RS485

63


64

SUBPROCESSOR DUAL PORT RAM ADDRESS CHECK FAILED

65

INITIALISATION FAULT RS485

66

WATCHDOG MONITORING RS485

67

NO DATA TRANSMISSION FROM RS485 TO CPU

68

RS485 DUAL PORT RAM ADDRESS CHECK FAILED

69

NO COMMUNICATION BETWEEN RS485 AND CPU

6B


6E

WRONG HARDWARE PCB C043

6F

BUSY ERROR RS485

78

PEAK CURRENT PROTECTION SHORT TIME

79

PEAK CURRENT PROTECTION LONG TIME

80

MAGNETIC FLUX TOO LOW IN TRACTION MOTORS

85

TORQUE NOT ACCORDING THROTTLE (TOO LOW/TOO HIGH)

87

WRONG HARDWARE CODE (HARD.-CODE >< SOFT.-CODE)

88

WRONG HARDWARE CODE

89

SUBPROCESSOR NOT FOLLOWING MAINPROCESSOR

8A

SYSTEM STUCK IN POWER MODE

8B

SYSTEM DENIED BRAKING MODE

8D

SPEED SENSOR 1 FAULT DIRECTION

8E


8F


90

SPEED SENSOR 1 FAULT HIGH SPEED

91

SPEED SENSOR 1 FAULT LOW SPEED

92


93


94


95


98

OVERSPEED

99

NO SPEED DETECTABLE

9A

WHEEL MISMATCH EXCEEDS LIMITS

9B

WARNING WHEEL MISMATCH EXCEEDS LIMITS

9E

DIRECTION FAULT OF SPEED SENSORS

9F

WRONG ROTATION DIRECTION


0 A0

WRONG HARDWARE LIMIT FOR PCB C043 (L1,L2,L3)

A1

WRONG HARDWARE LIMIT FOR PCB C043 (L4)

BD

VARIABLE FMAXWRSS OUT OF RANGE

BE

VARIABLE U1 OUT OF RANGE

BF

VARIABLE U2 OUT OF RANGE

C2

VARIABLE PSISOLL OUT OF RANGE

C5

VARIABLE IWS2 OUT OF RANGE

C7

VARIABLE ISMAX OUT OF RANGE

C8

VARIABLE NLSSOLL OUT OF RANGE

C9

VARIABLE MSB OUT OF RANGE

CA

VARIABLE MSF OUT OF RANGE

CB

VARIABLE AIWREGKOR OUT OF RANGE

D0

FAULT SUBPROCESSOR: CALCULATION TIME EXCEEDED

D1

FAULT SUBPROCESSOR: FIFO OUT OF TIME

D2

HEAVY FAULT SUBPROCESSOR: DATA NOT CALCULATED

D3

HEAVY FAULT SUBPROCESSOR: COUNTER EXCEEDED

D4

HEAVY FAULT SUBPROCESSOR: INTERRUPT MISSING

D5

HEAVY FAULT SUBPROCESSOR: INTERNAL ERROR OF SYSTEM

D6 HEAVY FAULT SUBPROCESSOR: WRONG INITIALISATION DATA D7 HEAVY FAULT SUBPROCESSOR: WRONG INITIALISATION DATA D8

HEAVY FAULT SUBPROCESSOR: UNKNOWN FAULT

D9

WRONG SOFTWARE VERSION PCB C011

DA

RIPPLE ON FLUX FEEDBACK PRESENT

F0

VARIABLE CAN NOT BE CALCULATED, ADDRESS=

FB

SNAPSHOT STORED ON REQUEST

INVERTER FAULT CLASSES When either one of the inverter computers detects a fault, it notifies the EM2000 (sometimes called the locomotive control computer or LCC) through the RS-485 link. Five groups, A through E, determine the corrective actions taken by the LCC. Type A faults are the most severe and require the firing of one of the inverter protection thyristors while class E faults the least severe consisting of crew warnings, etc. Any of these faults are displayed through the EM2000 display, and can also be seen in TC fault archive downloads. Some of the more typical faults and their classifications are described here.


CLASS A Class A are the most serious type and result in the firing of the IPT (Inverter Protection Thyristor). The EM2000 drops the load on the locomotive and prompts the operator to cut out the associated inverter. All loading operation of the affected inverter is prohibited until the fault has been reset. Reset of this type of fault can only be accomplished by resetting that inverter’s computer. This may be done via manual reset inside the inverter or by cycling the TC power supply circuit breaker on the panel inside the cab. As with the EM2000, the breaker must remain down for a minimum of 20 seconds in order to assure proper reboot execution. Class A faults are Class B faults, that occur more than once in a 10 minute period. Many of the Class A faults develop from Class B faults. If a Class B fault occurs more than once in a 10 minute time period, it becomes a Class A fault.

CLASS B Class B faults are the second most serious type which also result in the firing of the IPT. The EM2000 considers this as a drop load condition and will cycle the DCL switchgear (closed to open to closed) while passing a signal for IDLE mode to the affected inverter. Normal operation resumes once the DCL cycling has completed. If more than one Class B fault occurs within 10 minutes, a total operation lock results (see Class A faults). Class B faults are as follows.

• • • • • • • • • • • • • • • •

12B-18

Front connector loose or TC power supply failure. TCC Protection triggered - Reason undefined. Open circuit breaker between computer and TCC#n GTO gate drivers. Hard crowbar fired indication. Subprocessor operation not according to main processor. Watchdog. Wrong hardware coding. 24V GTO power supply undervoltage. 24V GTO power supply overvoltage. Soft crowbar fired indication. Heavy fault. Crowbar fired to assist other TCC. TCC computer power supply failure. DC Link overvoltage, total lock of TCC. GTO monitoring overcurrent. Undefined TCC code.


0

CLASS C Class C faults rank third in terms of severity. They result in a lockout of the affected inverter which automatically “unlocks” once the condition has gone away. The locomotive does not drop load in this situation, and no action by the EM2000 is required in the reset of this fault. The inverter computer affected internally resets itself. Class C faults are:

• • • • • • • • • •

A to D conversion time exceeded. Unbalanced AC system. Long time overcurrent. Short time overcurrent. Subprocessor operation not according to main processor. Undervoltage. Wrong rotation direction. No speed detectable. Overvoltage, total software lock. Undefined TCC code.

CLASS D A gradual reduction in inverter torque results when a Class D fault exists. The fault automatically resets and normal torque levels return once the restricting condition goes away. No action by the EM2000 is required in resetting this fault. Class D type fault are:

• • • • • • • • • • • • • • •

Flux too low. Maximum TCC temperature limit exceeded. Motor temperature sensor fault. System disabled braking mode. TCC Phase module temperature below minimum. Torque not according to throttle. Watchdog monitor or initialization fault RS-485. 3 phase module temperature sensor faults. Wheel diameter mismatch. Subprocessor fault. Missing feedback for GTO contactor. Crowbar test failure, re-run test to enable TCC. TCC overtemperature. TCC blower feedback failure. Undefined TCC code.


CLASS E Class E type faults are the least severe of the five classes. Sensor failure and other warnings make up the greatest majority of these types of faults. No corrective action is required of the EM2000, and normal locomotive operation is still permitted. Only a warning is issued to the operator, and operation is in no way restricted. Class E faults include:

• • • • • • • • • • • • • • •

12B-20

TCC temperature probe failure. Snubber resistor temperature sensor failure. Internal TC error. Memory board battery undervoltage. TCC heater feedback failure. Motor temperature sensor fault. Overspeed. RAM data lost, check battery. TC blower fault. Speed sensor pickup. Three phase module temperature fault. TCC computer temperature probe failure. Inlet guide vane feedback failure. Wheel mismatch warning. Undefined TCC code.


0

SECTION 13. DOWNLOAD EVALUATION When a locomotive is defective due to recorded fault conditions; accurate interpretation of download or captured data packs is a significant step towards repairing the locomotive. Data pack interpretation may lead the performance of load tests. This Section will cover protection circuits, testing modes, and fault analysis.

DC Link Overcurrent Protection OVERVIEW The first type of fault detected is known as a Protozoa fault, named after a Siemens protection card on the SD60MAC. This fault is the most severe. The overcurrent protection function also provides thermal overload protection of the generator on a notch-by-notch basis. This is accomplished by virtue of the fact that the DC link current varies with engine speed and DC link voltage. The EM2000 overcurrent protection is designed also to act as a back-up if a TCC throws a hard or soft crowbar without properly informing the EM2000. When this occurs, the fault will be classified as an, “Unannounced Crowbar”.

FAULT DETERMINATION There are four types of faults to be sensed by this process: 7. Instantaneous “protozoa” trips, using MG_CTA for GT46MAC. 8. Overcurrent faults in Power mode, using MG_CTA and TCCn_A for GT46MACs. 9. Sneaky crowbars during DC Link charge-up using MG_CTA for GT46MACS. 10. Overcurrent faults in Dynamic Brake mode, using MG_CTA for GT46MACs A fault condition exists when a specified current input exceeds the trip values. These values are given in the tables on the following two pages. If the specified current input drops below the trip level during the waiting period, then no fault condition exists.

SNEAKY CROWBAR DETECTION Anytime the DC link is charged up from zero volts, especially after inverter power-up, the locomotive could be experiencing a sneaky, or unannounced crowbar. This is the purpose of the low value in the following two tables (listed as “Idle, Prop, Inv not Acknowledge”). The idea is that if the TCC’s are not acknowledging power, then the TCC’s should not be drawing any current, and thus anything over the listed value is a sneaky crowbar and should be handled as such. DOWNLOAD EVALUATION 13-1

3939 THP GT46MAC Overcurrent Schedule Power 1 or 2 TCCs Power at each LEM

Dynamic Brake/Load Test

Signal

MG_CTA

MG_CTA

TCCn A

MG_CTA

Time to Trip

0 mSec

200 mS

200 Ms

200Ms

Idle - RV Centered

2000

525

See Note 1

Not Applicable

Idle Prop/ no TCC Ack

000

105

See Note 1

500 Amps

Throttle Position/ Engine Speed

Instantaneous Protozoa Trip

1

2000

525

“

500 Amps

2

2000

525

“

580Amps

3

2000

735

“

800Amps

4

2000

840

“

990Amps

5

2000

997

“

1180Amps

6

2000

1260

“

1380Amps

7

2000

1470

“

1540Amps

8

2000

1627

“

1640Amps

Note 1: One inverter trip levels are set to be 55 percent of the, “Power, 1 or 2 TCCs”, trip level. Trip values for “Power @ Each TCC LEM” are calculated based on the following formula: Trip Level (amps) = 125% * Truck kW / MAX{600V, MGV Lmt} whereTruck kW = MAX[Throttle Power Limit(Throttle), TnPrLm] See file “SIG_VALS” for values for the Throttle Power Limit, and MGV Lmt. (TnPrLm is the final power reference for inverter n. See master signal table.)

DC LINK UNDERVOLTAGE PROTECTION The DC link voltage, in power modes of operation, is normally controlled to follow a prescribed reference, which is a function of throttle position and locomotive speed. In dynamic brake mode, the main generator is controlled to prevent the DC link voltage from going below 600 Volts. Undervoltage protection is not performed by the EM2000. Instead, since the traction inverters are what require the voltage to be maintained, they assert faults when the voltage is too low.

13-2


0

UNDERVOLTAGE LEVELS When the DC link voltage drops about 50 volts below its reference, the traction inverters begin to reduce their output torque, since the output they provide is a function of the voltage they have at their input. At 250 volts below the reference, the traction inverters will send a fault to the EM2000, with text as follows: TCC #1 INTERNAL RESET DC LINK UNDERVOLTAGE or TCC #2 INTERNAL RESET DC LINK UNDERVOLTAGE

FAULT 388 494

Undervoltage faults often are the result of some other problem on the locomotive. Examples include an engine which is not maintaining the correct speed, or an inverter which draws a sudden burst of power.

DC Link Overvoltage Protection On AC locomotives, several levels of DC link overvoltage protection exist. One level is tripped by the EM2000, while the remaining levels are tripped by the TCC’s, which are programmed to react differently to rising levels of DC Link voltage. For the TCC initiated faults, the Inverter Manuals can be consulted for further information.

SYSTEM RESPONSE AT 3000 VOLTS - EM2000 INITIATED For GT46MACs, a fault condition exists when DCL V exceeds the trip level of 3000.

SYSTEM RESPONSE AT 3000 ± 50 VOLTS - TCC INITIATED At this voltage level, the TCC trips a lockout fault.

SYSTEM RESPONSE AT 3200 VOLTS - TCC INITIATED At this voltage level, the TCC fires a Soft Crowbar. The EM2000 is informed of this over the serial link. After 1.1 sec, TCC will set hard crowbar bit if the voltage has not decayed enough. The DCL switchgear is cycled automatically and the fault reset automatically.

SYSTEM RESPONSE AT 3400 VOLTS - TCC INITIATED At this voltage level, the TCC fires a Hard Crowbar. The EM2000 is informed of this over the serial link. The DCL switchgear is cycled automatically and the fault reset automatically.

DOWNLOAD EVALUATION 13-3

SYSTEM RESPONSE AT 3600 VOLTS - TCC INITIATED At this voltage level, the TCC Break Over Diode (BOD) trips, which fires a Hard Crowbar. The EM2000 is informed of this over the serial link. The DCL switchgear is cycled automatically and the fault reset automatically.

TABLE OF FIGURES Detailed Propulsion Op Mode Sequencing - Section 9G. Detailed Self Test Op Mode Sequencing - forward in this Section.

OPERATIONAL MODES Operator Requests The operator requests are created as a composite input to the op mode processing. They are used to simplify the op mode processing by handling most options and conflicts. The requests are created using inputs from the throttle/brake handle, trainline inputs, and air brake inputs. Conflicting requests within power and brake are arbitrated at this level. 1. Operator Power Request Operator power request determines the type of power mode that the operator is requesting. The processing also handles speed control power. Operator power request can take on one of four values, Power, Speed control Power, No Mode Request, Conflicting Request. The operator power request processing depends on the type of speed Control system that is installed. The characterization option “Speed Control Type” defines the speed Control system that is installed on particular locomotive. 1. Basic Operator Power Request 2. No Power Reduction or Speed Control Equipment The absence of both speed control and power reduction equipment is denoted by the characterization option “Power Reduction/ Speed Control” set to “No”. GF Req is the only input and it directly indicates a desire for power operation. No conflicts are possible.

GF Req

operator normal power request

False

No Mode Request

True

Power

Standard Speed Control / Power Reduction Equipment A standard speed control system is denoted by: Speed Control Type is: Generic Vendor Speed control or EMD Speed Control or Vendor Speed Control and Manual Power Reduction or Manual Power Reduction.

13-4


0 Speed control and power reduction are lumped together because both systems use the TL 24T voltage to adjust the loading level of the locomotive. When using the power reduction system, the TL 24T voltage is controlled manually. When using the speed control system, the TL 24T voltage is adjusted automatically to control the locomotive speed. TL 1T indicates a request for speed control power operation. GF Req indicates a request for power. A simultaneous request for both power and speed control results in a conflicting request.

GF Req

TL 1T

operator normal power request

False

False

No Mode Request

False

True

Speed Control Power

True

False

Power

True

True

Conflicting request

Operator Rollback Request (SD80 & 90 MAC Only) The operator rollback request is determined based on the movement of the locomotive. Rollback is entered if the locomotive is slowly rolling in the opposite direction of the reverser. Rollback remains active until either the unit moves forward or the reverser is centered. If the locomotive starts to move quickly in the opposite direction of the reverser, the Rollback request will continue. However, under these conditions, the opposite direction brake request will also become active, and override the Rollback request. A prerequisite of Rollback is whether the electric brake system is functional. This is indicated by the dynamic or blended brake cutout switches, whichever is applicable based on customer options. Overall Operator Power Request The overall operator power request is generally the operator normal power request, except when the operator rollback request is active and the operator normal power request is Power.

Operator Normal Power Request

EM2000 Rollback Request

EM2000 Power Request

No Mode Request

No mode Request

Conflicting request

Conflicting Request Speed

Control Power

Speed Control Power

Power

No Mode Request

Power

Power

Rollback

Rollback

Power

ODB

ODB


Operator Brake Request Operator brake request determines the type of brake mode that the operator is requesting. There are several methods of requesting a brake operation. Operator brake request can take on one of six values, Brake Setup, Dynamic Brake, No Mode Request, Emergency Brake, Opposite Direction Brake and Blended Brake. If there are multiple brake requests active, the types of dynamic brake are prioritized. The operator brake request does not handle speed control dynamic brake at this time. Dynamic Brake Conditions Dynamic brake requests are communicated by way of the dynamic brake handle inputs and the dynamic brake cutout switch. When dynamic brake is cutout, no dynamic brake requests can be generated. When dynamic brake is cut in, the dynamic brake handle is monitored. In the event that DB 21T is activated without DB 17T, dynamic brake is assumed. When Characterization Item Dynamic Brake Circuit Breaker Feedback = Yes, when the dynamic brake circuit breaker is not closed (input DB CB = FALSE), no dynamic brake requests can be generated.

DB CB

DBNtCO

DB 21T

DB 17T

False

operator db request No mode request

False

No mode request

True

True

False

False

No mode request

True

True

False

True

Brake Setup

True

True

True

Dynamic Brake

Opposite Direction Brake (AC Only) Opposite Direction Brake is the equivalent of plugging on a DC locomotive. It is activated when the operator sets the reverser handle to the direction opposite of movement. Opposite Direction Brake sets the locomotive up for dynamic brake regardless of the position of the throttle/DB handle; even with the handle in idle. Full dynamic brake effort is requested independent of the brake handle position. This method was chosen to best emulate DC traction motor plugging. Activating the request for Opposite Direction Brake with the throttle in idle emulates DC plugging. Once the DC power circuit is complete and plugging begins, returning the throttle to idle does not stop the plugging operation. The customer has the option of preventing the start of opposite direction brake above the MAX PLUGGING SPEED as defined in characterization (MAX. speed for GT46MAC). Once opposite direction brake is entered, increasing the speed above the MAX PLUGGING SPEED will not cause opposite direction brake to end. The electric brake system has to be operable. Note that on a Opposite Direction Brake option, or EDL, is not used, since, if Opposite Direction Brake is not desired, the “MAXIMUM PLUGGING SPEED” can be set to zero in the characterization.

13-6


0 Overall Operator Brake Request Given that several types of brakes can be requested simultaneously, the operator brake request must be prioritized. Emergency brake is the highest priority.

EM2000 odb request

EM2000 db request

No Mode Request

No Mode Request

Opposite Direction Brake

operator brake request

Opposite direction Brake

No Mode Request

Brake Setup 17T ON

Brake Setup

No Mode Request

Dynamic Brake 21T ON/24T

Dynamic Brake

No Mode Request

No Mode Request

No Mode Request

TESTING OP MODES (AC and DC) The display names, and values, are not listed here, but can be obtained from the Op Mode table. Several op modes are used exclusively for self tests. Self tests that require the alternator to be loaded are handled in a manor similar to Propulsion. Self tests that do not require loading do not have a working on state or a setup state. The general requirements to get to each test mode are given in the test instructions, on the display.


Figure 13-1 Detailed Self Test Op Mode Sequencing

LOAD TEST SETUP Load Test Setup is the first step toward all the load test modes. Load test directs the output of the traction alternator to either internal or external braking grids. By dissipating the engine power through the braking grids, engine performance can be evaluated at most operating points. Load Test Setup indicates that the operator has requested load test but has either not requested load or the locomotive is not ready for load.

13-8


0 The following conditions must be met to get to the Load Test Setup mode. 1. The operator has requested load test from the display. 2. The reverser handle is centered as indicated by RHSw F = FALSE and RHSw R = FALSE. 3. The control circuit breaker is on as indicated by Cntl CB = TRUE. 4. The local control circuit breaker is on as indicated by LC Bat = TRUE. 5. A request for a TCC to be cut in or cutout is not pending as indicated by traction change pending = FALSE.

The following conditions must be met to get to the Working on Load Test mode. 1. All the Load Test Setup requirements must be true. 2. The traction alternator exciter is ready to provide excitation to the SCRbridgeasindicatedbyenginerunningstate=RunningCAorRunning Both. 3. The LCC must be able to receive excitation frequency and voltage feedbacks as indicated by ACCntl = TRUE. 4. The isolation switch is in the run position as indicated by RUN = TRUE. 5. The ground relay protection system must be cut in and indicated by GRNtCO = TRUE 6. The source of energy for the engine cooling fans, traction motor blowers and so on is available as indicated by auxiliary system ready = TRUE. 7. The operator has requested loading by selecting throttle 1 or higher with the generator field switch on as indicated by operator power request = Power. 8. All the grids are connected to the DC link as indicated by the B contactors. B1 through B4 equals PU on locomotives with two grid paths. 9. The engine run switch is off as indicated by ER SW = FALSE. This is only required on locomotives that have an Engine Run switch, as indicated by the characterization item “Engine Run Switch Installed” = YES 10. For DC grid blowers of all powers, characterized according to “Grid Blower Horsepower,” the grid blowers are connected to each grid path as defined by the locomotive’s characteristics. When any of the conditions are not met the op mode will transition to Load Test Setup mode.


The following conditions must be met to get to the Load Test 1 mode. Load Test 1 Mode All the "Working on Load Test requirements" have been met. The operator has selected Load Test 1 through the display system. The generator field contactor is picked up as indicated by GFC = PU. For it to pickup, several other conditions must be met.

WORKING ON LOAD TEST Working on Load Test mode indicates that the locomotive’s power circuit and operator inputs are ready to activate the generator field circuit. Load Test 1 Load Test 1 mode indicates that the locomotive is self loading with nominal references. When the operator has selected load test 2 through the display system the op mode will transition to Load Test 2 mode. Load Test 2 Load Test 2 mode indicates that the locomotive is self loading using higher than normal references.

EXCITATION TEST BACKGROUND INFORMATION The purpose of this test is to qualify the operation of the SCR bridge and the computer’s ability to control it. In essence, this test checks that specified SCR firing angles deliver appropriate field voltages. Since a field voltage feedback signal does not exist, main generator field current will be used. In general, Ohm’s law can be used to relate the two quantities (V=IR). However, the field resistance value varies with temperature. Hence, an uncertain resistance and other system tolerances must be reconciled by establishing a suitable correction factor. The Excitation Test can uncover common failures modes such as a bad SCR, wrong phase rotation somewhere in the 3 phase wiring, and other wiring errors.

SINGLE SCR TEST This test provides a simple go/no-go check to see if individual SCRs are wired correctly and operational. It is especially well-suited for determining when only two phases are operational (such as with a failed SCR, a failed gate driver, or a mis-wire). During this test, each SCR will be turned on full for seven seconds and the main generator field current will be read. Then the SCR is turned off and the field current read again. This test starts at the moment the GFC is picked up.

13-10


0

MULTIPLE SCR TEST The multiple SCR test will be run only if there were no failures during the single SCR test. During this next test the delay angle for the SCRs will be changed four times and the resultant generator field current measured. Tests should proceed consecutively unless a failure is encountered. In that case, no additional tests shall be performed. The appropriate response is put on the display screen. Test “0” The first SCR test being run is “Test0”, this is the beginning of the SCR test, which has all 3 legs of the SCR turned off. For this test to pass the requirement is to have less than 10 amps of field current. Test “1, 3 and 5” –

Tests one, three and five turns on each leg of the SCR individually. For this test to pass the field output current must exceed 20 amps.

–

Test 1 turns on SCR-1, test 3 turns on SCR-2 and test 5 turns on SCR-3.

–

During this test the field current output should be monitored to determine that all three current feedbacks are balanced.

Tests “2,4 and 6” Tests two, four and six turn off the SCR leg from the previous test, that is

Test 2

Turns off

Test 1

Test 4

Turns off

Test 3

Test 6

Turns off

Test 5

These test verify that the field current has decayed to less than 10 amps. The current feedback during each test should decay to zero amps. If this does not occur the decay portion of the excitation circuit should be examined. Test #7 (Baseline): –

The nominal field current reference is a fixed value based on traction generator model which equals to approximately 50% of full excitation at the specified engine RPM.

–

The corrected reference is simply the nominal field current reference since a correction factor is not available.

–

The tolerance for passing this test is deliberately set high (3.5%) in recognition of the fact that the reference has not been corrected.

–

Finally, a correction factor is computed as follows: Field Current Feedback Correction Factor = CF = _____________________________ Nominal Field Current Reference


Test #8 (Low Excitation): –

This particular test checks to make sure that the SCR bridge exhibits proper control when very low levels of excitation are requested, which equals approcimatley 10% of full excitation at the specified engine RPM.

–

The nominal field current reference is a fixed value based on traction generator model.

–

The corrected reference is obtained by multiplying the nominal refer-ence by the correction factor.

–

The tolerance for passing this test is 75%. Note that 75% of a small number is actually a small tolerance in contrast to the full output value. The intent is to check if the SCR bridge is able to control at low levels. The exact value isn’t critical.

Test #9 (Max Excitation): –

This test makes sure that the SCR bridge is capable of achieving full excitation at the specified engine RPM.

–

The nominal field current reference is a fixed value based on traction generator model.

–

The corrected reference is obtained by multiplying the nominal refer-ence by the correction factor.

–

The tolerance for passing this test is 10%.

– Test #10 (No Excitation): –

This test re-checks the system to be sure that all the SCRs are really turned off. Note that the display screen does not identify this test. Only the timer will be active which indicates that the test is almost finished. Note that this time interval gives the observer a few seconds to study the data on screen before it gets replaced by subsequent screens.

–

Essentially, this test waits for the main generator field current to decay and then checks to see that it is less than 10A.

EXCITATION TEST SETUP MODE Excitation Test Setup is the first step toward the excitation test modes. Excitation test is used to test the generator field circuit and control. The traction alternator is configured in an open circuit for this test. Excitation Test Setup indicates that the operator has requested excitation test but the locomotive is not ready for load.

13-12


0 The following conditions must be met to get to the Excitation Test Setup mode. Excitation Test Setup Mode 1. The operator has requested excitation test from the display. 2. The reverser handle is centered as indicated by RHSw F = FALSE and RHSw R = FALSE. 3. The control circuit breaker is on as indicated by Cntl CB = TRUE. 4. The local control circuit breaker is on as indicated by LC Bat = TRUE. 5. A request for a TCC to be cut in or cutout is not pending as indicated by traction change pending = FALSE. The op mode will not transition from Excitation Test Setup mode to Idle Mode until the operator exits the test. This forces the operator to exit the test before any other op mode can be initiated.

The following conditions must be met to get to the Working on Excitation Test mode. Working on Excitation Test Mode 1. All the Excitation Test Setup requirements. 2. The DCL switchgear is in the open position as indicated by DCOp = PU and DCCl = DO. 3. The traction alternator exciter is ready to provide excitation to the SCR bridge as indicated by engine running state = Running CA or Running Both. 4. The LCC must be able to receive excitation frequency and voltage feedbacks as indicated by ACCntl = TRUE. 5. The ground relay protection system must be cut in and indicated by GRNtCO = TRUE 6. The generator blower is activated. If the generator blower is electric then GnBwCB must be TRUE. Assume that the blower is activated if it is mechanically driven. 7. The isolation switch is in the run position as indicated by RUN = TRUE. 8. All the grids are disconnected from the DC link as indicated by the B contactors; B1 through B4 equals DO on locomotives with two grid paths: B1 and B2 equals PU on locomotives with one grid path. 9. The local and trainlined throttle handle is in the idle position as indicated by TH Idl = TRUE and throttle = Idle. When any of the conditions are not met the op mode will transition to Excitation Test Setup mode.


The following conditions must be met to get to the Excitation Test mode. Excitation Test Mode 1. All the Working on Excitation Test requirements. 2. The generator field contactor is picked up as indicated by GFC = PU. For it to pickup, several other conditions must be met. When any of the conditions are not met the op mode will transition to Working on Excitation Test.

WORKING ON EXCITATION TEST Working on Excitation Test mode indicates that the locomotive’s power circuit and operator inputs are ready to activate the generator field circuit.

EXCITATION TEST Excitation Test mode indicates that the locomotive can start load as required by excitation test.

TCC PROTECTION TEST SETUP TCC Protection Test Setup is the first step toward the TCC protection test modes. The TCC protection test is used to verify the operation of the TCC crowbars and its related circuitry. The DC link(s) are charged with voltage and the crowbars fired. By monitoring the DC link voltage, the operation of the TCC protection system can be verified.

TCC Protection Test Setup indicates that the operator has requested TCC protection test but the locomotive is not ready for load. The following conditions must be met to get to the TCC Protection Test Setup mode. TCC Protection Test Setup 1. The operator has requested TCC protection test from the display. 2. The reverser handle is centered as indicated by RHSw F = FALSE and RHSw R = FALSE. 3. The control circuit breaker is on as indicated by Cntl CB = TRUE. 4. The local control circuit breaker is on as indicated by LC Bat = TRUE. 5. The TCC computers (ASGs) are powered as indicated by the voltage protection contactor, VPC = PU. 6. The circuits that are required to control the DCL switchgear are operational. The LCC must be able drive and read the following digital states (i.e. circuit available): DCOp, DCCl, TICOi

13-14


0 7. A request for a TCC to be cut in or cutout is not pending as indicated by traction change pending = FALSE. The following conditions must be met to get to the Working on TCC Protection Test mode. Working On Tcc Protection Mode 1. All the TCC Protection Test Setup requirements. 2. The DCL switchgear is in the closed position as indicated by DCOp = DO and DCCl = PU. 3. The traction alternator exciter is ready to provide excitation to the SCR bridge as indicated by engine running state = Running CA or Running Both. 4. The LCC must be able to receive excitation frequency and voltage feedbacks as indicated by ACCntl = TRUE. 5. The ground relay protection system must be cut in and indicated by GRNtCO = TRUE 6. The generator blower is activated. If the generator blower is electric then GnBwCB must be TRUE. Assume that the blower is activated if it is mechanically driven. (SD80/90MAC only) 7. The isolation switch is in the run position as indicated by RUN = TRUE. 8. The local and trainlined throttle handle is in the idle position as indicated by TH Idl = TRUE and throttle = Idle. 9. All TCCs must be cut in as indicated by TICO1 = DO, TICO2 = DO, and APSICO = DO if so equipped. 10. The TCC protection test has not fired a hard or soft crow bar in the last 5 minutes. When any of the conditions are not met the op mode will transition to TCC Protection Test Setup mode. The following conditions must be met to enter the TCC Protection Test mode. Tcc Protection Test Mode 1. All the Working on TCC Protection Test requirements except 10 above. It is permissible for a hard, medium, or soft crowbar to have been fired in the last 5 minutes. 2. The generator field contactor is picked up as indicated by GFC = PU. For it to pickup, several other conditions must be met. When any of the conditions are not met the op mode will transition to Working on TCC Protection Test mode.


WORKING ON TCC PROTECTION TEST MODE Working on TCC Protection Test mode indicates that the locomotive’s power circuit and operator inputs are ready to activate the generator field circuit.

TCC PROTECTION TEST MODE TCC Protection Test mode indicates that the locomotive can start load as required by TCC protection test.

DCL SHORTING TEST 1 SETUP DCL Shorting Test 1 Setup is the first step toward the DCL shorting test modes. The DCL shorting test is used to verify that the DC link(s) are shorted and connected to ground. The first part of the test (Test 1) charges and discharges the DC link(s) to verify the operation of the DC link voltage transducers installed on the locomotive. After the transducers are verified, the second part of the test begins. The second part of the test verifies the operation of the DCL switch gear and its associated cutout solenoids. DCL Shorting Test 1 indicates that the operator has requested DCL shorting test but has either not requested load or the locomotive is not ready for load.

WORKING ON DCL SHORTING TEST 1 MODE Working on DCL Shorting Test 1 mode indicates that the locomotive’s power circuit and operator inputs are ready to activate the generator field circuit.

DCL SHORTING TEST 1 MODE DCL Shorting Test 1 mode indicates that the locomotive can start load as required by DCL shorting test.

WORKING ON DCL SHORTING TEST 2 Working on DCL Shorting Test 2 mode indicates that the locomotive has passed the first phase the DCL shorting test involving the verification of the voltage transducers. The locomotive must now setup for the DCL switch gear phase of the DCL shorting test.

DCL SHORTING TEST 2 MODE DCL Shorting Test 2 mode indicates that the locomotive can begin the interrogation of the DCL switch gear and its associated equipment.

13-16


0

CONTACTOR TEST MODE Contactor Test mode indicates that the locomotive is in contactor test. This test checks the operation of most of the switch gear and contactors on board the locomotive. Devices that are not controlled by the LCC or do not have feedbacks can not be tested. A few devices with feedbacks and LCC control can not be tested because their operation will cause an undesirable action or they can not be operated without special activating criteria, i.e. the start contactor (ST).

Cooling Fan Test Mode Cooling Fan Test mode indicates that the locomotive is in cooling fan test. Cooling fan test allows that fan to be turned so that their operation can be observed.

TCC BLOWER TEST MODE TCC Blower Test mode indicates that the locomotive is in TCC blower test. This test operates the motor driven TCC blower(s) in an attempt to verify their operation.

WHEEL SLIP LIGHT TEST MODE Wheel Slip Light Test mode indicates that the locomotive is in wheel slip light test mode. The wheel slip light test activates the wheel slip light to test the operation of the circuitry used to light the light.

RADAR TEST MODE Radar Test mode indicates that the locomotive is in radar test mode. The radar test activates an internal self test within the radar. This circuitry between the LCC and radar can be verified by the test.

METER TEST MODE Meter Test mode indicates that the locomotive is in meter test mode. The meter test verifies the ability of the LCC to transmit load meter and speedometer information to the analog meters.

WHEEL FLANGE TEST MODE Wheel Flange Test mode indicates that the locomotive is in wheel flange test mode. The test verifies the ability of the LCC t control the wheel flange lubrication system.


TEST OP MODE TABLE The following table lists the operating modes along with their display names.

13-18

Op Mode (Hex)

Display Name

Load Test Setup

LTSU

Working on Load Test

WLT

Load Test 1

LT1

Load Test 2

LT2

Excitation Test Setup

ETSU

Working on Excitation Test

WEXC

Excitation Test

EXCT

TCC Protection Test Setup

IPSU

Working on TCC Protection Test

WOIP

TCC Protection Test

TCPT

DCL Shorting Test 1 Setup

DCSU

Working on DCL Shorting Test 1

WDCS

DCL Shorting Test 1

DCSH

Working on DCL Shorting Test 2

WDCS

DCL Shorting Test 2

DCSH

Contactor Test

CONT

Cooling Fan Test

FANT

Traction Motor Blower Test

TMBT

TCC Blower Test

TCCBT

Speed Control Test

SS T

Wheel Slip Light Test

WS T

Radar Test

RADT

Meter Test

MTRT

Linking Valve Test

LV T

AC Grid Blower Test

Blended Brake Test


0

DOWNLOAD EVALUATION When analyzing an EM2000 archive, not only are the specific faults that occur important, but also their relationship to adjacent faults, the frequency of a given fault, and the time that a fault is active.

FAULT ACTIVITY, INACTIVITY, AND ACKNOWLEDGMENT When a fault occurs, the time that it occurs is logged. As long as the fault conditions persist, the fault will be considered active. Below is an example of an air brake related fault which occurred on BNSF unit 9869, on February 10, at 06:20:24. In addition to being recorded in the first line of fault information, the time this fault occurred is repeated in the “Fault Active Information” line. As indicated in the “Fault Inactive Information”, line, the fault conditions did not clear until 06:25:56. On February 15, at 04:02:44, someone acknowledged that this fault occurred, by hitting the “Acknowledge”, key while perusing the archive. The “Acknowledge” function is used to indicate whether a fault has been properly investigated and addressed by Field Service Personnel. The decision to acknowledge a fault may depend on different things. For example, in some cases, a fault may occur only once, for no apparent reason, and not repeat. In other cases a fault may occur several times. In the later case, a more in depth analysis may be required, since there is likely a curable cause to the problem, which should be found and fixed, before the fault is acknowledged.


SINGLE DATA PACK AND COUNT OCCURRENCING Many faults are stored with a data pack, which gives the values of pertinent signals, at the time that the fault occurred. To prevent filling up the archive with faults that likely have the same characteristics each time they occur, some faults are “Count Occurrenced”. In this case, only one data pack is shown for a given fault, and the number of times the fault occurs in a 24 hour period is counted. In this case, the fault occurred 20 times, in the 24 hour period. The data pack is stored at the time of the fault's first occurrence (in the 24 hour period), and this corresponds to the “Fault Active” time. The “Fault Inactive” time corresponds to the time in which the last fault in the 24 hour period went inactive. An example of a single data pack, count occurrenced fault is the TPU RPM fault shown below.

13-20


0

TIME SEQUENCED DATA PACK For certain faults, usually serious in nature, having a data pack at the time of the fault is insufficient for fault analysis purposes. This is true primarily because a data pack at the time of a fault may show more of the effect of the fault, than its cause, as things may already be decaying. Therefore, for certain faults, a “Time Sequenced Data Pack” is used. These data packs contain information, at the time of a fault, as well as at one second intervals for five seconds prior to the fault. An example of such a fault is shown below. These faults can also be count occurrenced, in which case the timing information (for activity, inactivity, etc.), detailed in the previous section applies.


13-22


0


In analyzing time sequenced data packs, more often than not, to come to any conclusions as to the cause of a fault, careful attention has to be paid to the signal values in the data leading up to the fault. In the TCC #2 Undervoltage fault given above, at the time of the fault, the following conclusions can be drawn: 1. The generator was not able to maintain the required voltage. 2. The engine speed was lower than it should be, which may have caused conclusion #1. 3. The engine is trying to maintain speed, as indicated by the value of EngineR being at 0.99, which means the maximum fuel is being delivered. With only these conclusions, the cause of the fault is not apparent - was the engine unable to provide the proper power, or was it overloaded prior to this fault?

13-24


0 Examination of the data for the seconds leading up to the fault answers this question. At 5, 4, 3, and 2 seconds prior to the fault, the signals are in the normal range. At 1 second prior to the fault, the Engine R is at 0.99, but the power output, as given by KW Fbk, is lower than the throttle 8 limit, so something caused the engine to loose its ability to provide its normal power output. One likely possible cause for this would be the so called “half horsepower” mode, where the receiver ECM is not functioning.

TIME RELATIONSHIP BETWEEN FAULTS Often times, multiple faults logged in the archive may be related to each other. It is usually undesirable to have this situation, since typically only one fault is closely tied to the root problem, and any others are simply effects of the problem. In some cases, as with the Undervoltage fault considered above, no fault is logged that is directly tied to the real problem, in which case other fault information is relied upon to give insights. In analyzing an archive, it is therefore important to assess the time relationships between faults, and try to determine if there is any common cause, for multiple faults. Following is a series of faults related to the GTO power supplies, and the Companion Alternator (CA). The first in this series of faults (starting from the bottom 1.), was a failure of GTOPS1 to pick up, #2614 at 07:41:52. The same fault was logged for GTOPS2, #2612 at the same time. 2. Ten seconds later, at 07:42:02, a, “NO COMPANION ALTERNATOR OUTPUT” fault #637, was logged, 3. Finally, at 07:43:00, a “TCC #2 RESET - GTO POWER SUPPLY UNDERVOLTAGE”, fault #507 was logged. Clearly the last fault, #507, was caused by the conditions implied by the earlier faults, namely that there was no GTO power supply output, nor any CA output. The reason for the delay before the undervoltage fault is that this fault is not triggered until a direction request is made, i.e. the reverser is thrown, (this is shown by the Op Mode being PRPRQ, which is Propulsion Requested). Since the GTO power supplies and CA field are both powered by the auxiliary generator, (aux gen), it is logical to assume that the aux gen was not maintaining its output. In this particular sequence of faults, the reason that the CA output fault #637, was 10 seconds after the GTOPS faults. #2612 and #2614, is that the CA fault is purposefully delayed, so that it is not logged upon engine start-up, it can take several seconds after engine start-up, for the aux gen to begin regulating at the proper output. The control system knows when the engine is not running, and when it has CA output, it does not request the GTO power supplies to turn on unless there is CA output. This implies that the engine was running at the time of the GTOPS faults and that the aux gen output suddenly dropped. Since both power supplies tripped the same fault, it is unlikely that it is a power supply problem, but rather a source problem. The most likely bottom line root cause of this whole episode, was that the DVR stopped supplying field current to the aux gen. As fault #637 implies, the aux gen field circuit breaker may have been tripped. But this could still be indicative of a DVR problem, since the DVR supplies the trip coil of this breaker.


13-26


0


13-28


Appendix A . DATA PACKS

NOTE: The List shown on the following pages includes all the signals used by EM2000 for all locomotive models. Some Signals are not applicable to the GT46MAC locomotives

DATA PACKS A- 1

DATA PACKS A- 2

DATA PACKS A- 3

DATA PACKS A- 4

DATA PACKS A- 5

DATA PACKS A- 6

DATA PACKS A- 7

DATA PACKS A- 8

DATA PACKS A- 9

DATA PACKS A- 10

DATA PACKS A- 11

DATA PACKS A- 12

DATA PACKS A- 13

DATA PACKS A- 14

DATA PACKS A- 15

DATA PACKS A- 16

DATA PACKS A- 17

DATA PACKS A- 18

DATA PACKS A- 19

DATA PACKS A- 20

DATA PACKS A- 21

DATA PACKS A- 22

Appendix B. SIGNAL DESCRIPTIONS

NOTE: The List shown on the following pages includes all the Signals Descriptions for all locomotive models. Some Signals Descriptions are not applicable to the GT46MAC locomotives

SIGNAL DESCRIPTIONS B-1

Signal Name %Adh %TMAvl 0 A Valv> A_gcc AB_Act

Data Item &percent_adhesion &percent_motors_available &NULL_STRING &SIG_IO_STATE(A_VALV) &A_gcc &DISCRETE_IN(AB_ACT)

AB_COUT

&SIG_IO_STATE(AB_COUT)

AB_FLT

&DISCRETE_IN(AB_FLT)

AB_MODE

&SIG_IO_STATE(AB_MODE)

AB_Pen< AB_Stu AB_STUP

&SIG_IO_STATE(AB_PEN) &DISCRETE_IN(AB_STU) &SIG_IO_STATE(AB_STUP)

AB_T_Rq

&DISCRETE_OUT(AB_T_RQ)

AB_T_RS

&DISCRETE_IN(AB_T_RS)

AB_T_SU

&SIG_IO_STATE(AB_T_SU)

ABNAp< ABNApa<

&SIG_IO_STATE(ABNAP) &SIG_IO_STATE(ABNAPA)

ABNApB<

&SIG_IO_STATE(ABNAPB)

ABRel<

&SIG_IO_STATE(ABREL)

AC Run<

&SIG_IO_STATE(AC_RUN)

AC Run>

&SIG_IO_STATE(AC_RUN)

Description Percent Adhesion. per_mtr_avail - &percent_motors_available Null Signal Governor A Valve: A value of TRUE activates the governor's A valve. A_gcc - &A_gcc Any air brake activity within the last one second will cause this bit to be set. Lack of activity will clear this bit. The signal is defined this way to simplify EM2000 logic. Air Brake Cutout signal coming from microprocessor air brake system via serial link. Indicates whether air brake system brake valve is CUTIN or CUTOUT. Air Brake Fault Code signal coming from microprocessor air brake system via serial link. Indicates (pre-assigned) code number of detected fault. Air Brake Mode signal coming from microprocessor air brake system via serial link. Indicates whether air brake system is set up for FREIGHT or PASSENGER operation. A penalty air brake application will cause this bit to be set. Currently Not Used. Air Brake Setup signal coming from microprocessor air brake system via serial link. Indicates whether air brake system is set up for LEAD or TRAIL operation. Used to signal the air brake system to perform its self test. This signal originates from EM2000 display screen. Air Brake Test Response signal coming from microprocessor air brake system via serial link. Indicates one of several possible outcomes of running an air brake self test. Air Brake Test Setup Status signal coming from microprocessor air brake system via serial link. Indicates whether air brake system is setup properly in order to run an air brake self test. Derived Air Brake Not Applied Signal. Air Brake Not Applied Cab A: A TRUE value indicates that there is a request from the operators console in Cab #1 to not apply the automatic air brakes (Request through CAB1). First used on EW&S JT42CWR (input is normally closed). Air Brake Not Applied Cab B: A TRUE value indicates that there is a request from the operators console in Cab #2 to not apply the automatic air brakes (Request through CAB2). First used on EW&S JT42CWR (input is normally closed). Air Brake Release request: A TRUE value indicates that a request has been made to release the automatic air brakes. First used on EW&S JT42CWR. Air Compressor Run Contactor Feedback - a TRUE value indicates that the AC Run contactor is picked up. (Associated with Soft Start MDAC control) Air Compressor Run - [1st used LIRR DE30AC MDAC Single Speed - Soft Start] SIGNAL DESCRIPTIONS B-2

AccFreq Accl ACCLS<

ACCntl< ACCPRL> ACCPRR> ACCRS<

AccShHP AccShPw ACFSA> ACFSAB< AclShPw ACSS< ACSS> ACStRn< ACStRn> ACStrt< ACStrt> Act_cc AdrErr AfclC_T AFPSw<

&ANA_IN_SLOW(ACC_FREQ) &locomotive_acceleration &SIG_IO_STATE(ACCLS)

Accessory frequency whether it is the Ca or the HEP system. Locomotive acceleration (0.0-99.9 mph/sec or kpm per sec) AC Contactor - Left Side: This is the feedback from the ACCLS power contactor used on locomotives with split-bus HEP capabilities. A TRUE value indicates that the left side (side opposite the engineer's side on short hood forward locomotives) of the loco &SIG_IO_STATE(ACCNTL) AC Control Circuit Breaker: A TRUE value indicates that the AC Control circuit breaker is in the closed position. &SIG_IO_STATE(ACCPRL) AC Contactor Pilot Relay Left Side [1st Used - LIRR DE30AC] &SIG_IO_STATE(ACCPRR) AC Contactor Pilot Relay Right Side [1st Used - LIRR DE30AC] &SIG_IO_STATE(ACCRS) AC Contactor - Right Side: This is the feedback from the ACCRS power contactor used on locomotives with split-bus HEP capabilities. A TRUE value indicates that the right side (engineer's side on short hood forward locomotives) of the loco is set up to fe &ANA_IN_SLOW(ACC_SHAFT_P Accessory shaft power feedback, display in units of HP WR) &ANA_IN_SLOW(ACC_SHAFT_P Accessory shaft power feedback WR) &SIG_IO_STATE(ACFSAB) Air Compressor Fast Speed Contactor: A TRUE value causes the compressor motor to operate a fast speed. &SIG_IO_STATE(ACFSAB) Air Compressor Motor High Speed Contactor Feedback: A TRUE value indicates that the ACFSA contactor and the ACFSB contactor are in the closed position. &ANA_IN_SLOW(ACCEL_SHAFT Acceleration shaft power feedback for the engine. _PWR) &SIG_IO_STATE(ACSS) Air Compressor Motor Slow Speed Contactor Feedback: A TRUE value indicates that the contactor is in the closed position. &SIG_IO_STATE(ACSS) Air Compressor Slow Speed Contactor: A TRUE value causes the compressor motor to operate a slow speed. &SIG_IO_STATE(ACSTRN) Air Compressor Start / Run Contactor Feedback - a TRUE value indicates that the ACStRn contactor is picked up. (Associated with Soft Start MDAC control) &SIG_IO_STATE(ACSTRN) Air Compressor Start / Run - [1st Used LIRR DE30AC MDAC Soft Start] &SIG_IO_STATE(ACSTRT) Air Compressor Start Contactor Feedback - a TRUE value indicates that the ACStrt contactor is picked up. (Associated with Soft Start MDAC control) &SIG_IO_STATE(ACSTRT) Air Compressor Start - [1st Used LIRR DE30AC MDAC Soft Start] &actual_circuit_configuration act_cc - &actual_circuit_configuration &address_error_count addr_errors - &address_error_count &afcl_core_in_temp_ref afcl_c_in_t - &afcl_core_in_temp_ref &SIG_IO_STATE(AFPSW) Automatic Fuel Transfer Pressure Switch: A value of TRUE indicates that sufficient pressure has been reached to allow the automatic fuel transfer system to continue to operate. SIGNAL DESCRIPTIONS B-3

AFT CB< AFT< AFT> AFTCBT> AFTOVF<

AGenON< AGExEn< AGExEn> AGFCB< AGFCBT> AirBxDn Alarm< AlGR< AlGRst> AlRsCO<

AlrSln< AlrSLt> AlrtCO<

Alt Tmr AltAAB<

&SIG_IO_STATE(AFT_CB)

Automatic fuel transfer circuit breaker feedback. A value of TRUE indicates that the circuit breaker to energize the fuel transfer system is Closed. First used on BNSF SD70MAC 966706. &SIG_IO_STATE(AFT) Automatic Fuel Transfer Relay Feedback: A TRUE value indicates that the automatic fuel transfer relay is in the closed position. &SIG_IO_STATE(AFT) Automatic Fuel Transfer Relay: A value of TRUE activates the automatic fuel transfer relay which in turn activates the fuel transfer pump. &SIG_IO_STATE(AFTCBT) Automatic Fuel Transfer Circuit Breaker Trip Coil: A value of TRUE will activate the trip coil on the circuit breaker to cause the CB to trip. &SIG_IO_STATE(AFTOVF) Auto Fuel Transfer Tank Level Float Switch: A TRUE value indicates that the fuel level in the tank is almost full. This float switch is used to ensure that the auto fuel transfer system will shut off in case the fuel level from ICE is inaccurate. Spec 3 &SIG_IO_STATE(AGENON) Auxiliary Generator Field Circuit Breaker: A TRUE value indicates that auxiliary generator field circuit breaker is in the closed position. &SIG_IO_STATE(AGEXEN) Auxiliary Generator Excitation Enable - a TRUE value indicates that the AGExEn relay has picked up. &SIG_IO_STATE(AGEXEN) Auxiliary Generator Excitation Enable &SIG_IO_STATE(AGFCB) Auxiliary Generator Field Circuit Breaker - a TRUE value indicates that the AGFCB is closed. &SIG_IO_STATE(AGFCBT) Auxiliary Generator Field Circuit Breaker Trip Coil: A value of TRUE will activate the trip coil on the circuit breaker to cause the CB to trip. &ANA_IN_SLOW(AIR_BOX_DEN The air box density as determine by EMDEC and sent to the EM2000 on the 2 way serial link. SITY) &SIG_IO_STATE(ALARM) A value of TRUE indicates the AR relay, trainline 2T, or the attendant call button is active. &SIG_IO_STATE(ALGR) Alternator Ground Relay Feedback: A TRUE value indicates that the relay is in the closed position. &SIG_IO_STATE(ALGRST) Alternator Ground Relay Reset: A TRUE value indicates that this ground relay should be reset. &SIG_IO_STATE(ALRSCO) Alerter Reset Cut-Out Switch: A TRUE value (input is high) indicates a request to cutout (deactivate) the alerter reset switch(es). First used on EW&S JT42CWR to cutout the DSD pedal. (SWG) &SIG_IO_STATE(ALRSLN) Alarm Silence Switch : A value of TRUE indicates the operator's request to silence the alarm. &SIG_IO_STATE(ALRSLT) Alarm Silence Light: A TRUE value indicates that the alarm silence light is to be turned on. &SIG_IO_STATE(ALRTCO) Alerter Cut-Out Switch: An EM2000 input that is passed through to the ICE system with information regarding the status of the Alerter System. A TRUE value (input is high) indicates a request to cutout (deactivate) the alerter system. &alerter_system_timer EWS Alerter System Timer. &SIG_IO_STATE(ALTAAB) ALerTor Apply Air Brake relay feedback signal


AltAAB>

AltBel> AltHrn> AltLt> AltRsA< AltRsB< AltRst< AltRst< AmbDens AmbienF AmbTmpF AMT_KW AMT_KWD AMT_KWH AMT_KWP AMtrMPH ANA_InB ANAInfo Anlg01 Anlg02 AnnKey< APCcRb APCIN1< APCIN2< APCIN3<

&SIG_IO_STATE(ALTAAB)

ALerTor relay to Apply Air Brake. This is the relay equivalent to the MV_Alt output. It was first used with the Davies & Metcalfe air brake system which needed a contact closure to provide a penalty brake application. &SIG_IO_STATE(ALTBEL) Alerter Bell: A true value activates the alerter system bell. &SIG_IO_STATE(ALTHRN) ALTHRN is the output to the horn from the alerter. &SIG_IO_STATE(ALTLT) ALTLT is the output to the light in Cab No. 1 or Cab No. 2 for the alerter system. &SIG_IO_STATE(ALTRSA) Alerter Reset Cab A: A value of TRUE indicates the operator's request to reset the alerter in the #1 Cab position (request from CAB1). &SIG_IO_STATE(ALTRSB) Alerter Reset Cab B: A value of TRUE indicates the operator's request to reset the alerter in the #2 Cab position (request from CAB2). &SIG_IO_STATE(ALTRST) Alerter Reset: A value of TRUE indicates operator's request to reset the alerter. &SIG_IO_STATE(ALTRST) Derived Alerter Reset Signal. &ANA_IN_SLOW(AMBIENT_AIR_ Ambient Air density given in Kg/M^3 DENSITY) &ANA_IN_SLOW(AMBIENT_TEM Calculated ambient temperature. P) &ANA_IN_SLOW(AMBTMP) This is the temperature of the air outside of the locomotive. DON'T CHANGE THIS NAME! &amtkw AMT_KW - Instantaneous power drawn from the third rail. &amtkwd AMT_KWD - 3rd Rail kilowatt demand, averaged over a 15-minute interval. &amtkwh AMT_KWH - Accumulated kilowatt-hours drawn from the 3rd Rail. &amtkwp AMT_KWP - Max value of Kilowatt Demand &avg_motor_speed Calculated Average Motor Speed. &analog_input_buffer ana_in_buf - &analog_input_buffer &analog_input_info ana_info - &analog_input_info &ANA_OUT(ANLG01) Generic Analog Output 1: Full scale is 10 Volts. The analog recorder output option determines the signal that is output and its full scale value. An EM2000 signal of "1" yields 10 volts. &ANA_OUT(ANLG02) Generic Analog Output 2: Full scale is 10 Volts. The analog recorder output option determines the signal that is output and its full scale value. &SIG_IO_STATE(ANNKEY) Annett's Key. A TRUE value indicates switch is closed. &ANA_IN_SLOW(APCCRB) Crankcase pressure of the engine's right bank. &SIG_IO_STATE(APCIN1) Auxiliary Power Converter Input 1: The 1st of 4 input bits telegraphing hex codes about APC status. &SIG_IO_STATE(APCIN2) Auxiliary Power Converter Input 2: The 2nd of 4 input bits telegraphing hex codes about APC status. &SIG_IO_STATE(APCIN3) Auxiliary Power Converter Input 3: The 3rd of 4 input bits telegraphing hex codes about APC status.


APCIN4<

&SIG_IO_STATE(APCIN4)

APCINH>

&SIG_IO_STATE(APCINH)

APCRST> APImLbP APImRbP APS GR< APSBUp< APSBUp>

&SIG_IO_STATE(APCRST) &ANA_IN_SLOW(APIMLB) &ANA_IN_SLOW(APIMRB) &SIG_IO_STATE(APS_GR) &SIG_IO_STATE(APSBUP) &SIG_IO_STATE(APSBUP)

APSGRR< APSGRR> APSICO< APSICO>

&SIG_IO_STATE(APSGRR) &SIG_IO_STATE(APSGRR) &SIG_IO_STATE(APSICO) &SIG_IO_STATE(APSICO)

APSIso< APSIso> APSNrm< APSNrm>

&SIG_IO_STATE(APSISO) &SIG_IO_STATE(APSISO) &SIG_IO_STATE(APSNRM) &SIG_IO_STATE(APSNRM)

AR< AR> Arc_res ArStDt ArStrHd

&SIG_IO_STATE(AR) &SIG_IO_STATE(AR) &archive_index_rear &INT_U_IN(ARSTDT) &SIG_IO_STATE(ARSTRHD)

ArTxtHd

&SIG_IO_STATE(ARTXTHD)

ASPrSw<

&SIG_IO_STATE(ASPRSW)

AT_bec AT_fld AT_gcc AT_ipc

&AT_bec &AT_field &AT_gcc &AT_ipc

Auxiliary Power Converter Input 4:The 4th of 4 input bits telegraphing hex codes about APC status. Auxiliary Power Converter Inhibit: This output is set TRUE when APC operation is to be suspended. Auxiliary Power Converter Reset: This output is set TRUE when an APC fault is to be reset. Air pressure at the engine's left bank intake manifold. Air pressure at the engine's right bank intake manifold. Auxiliary Power System Ground Relay: Auxiliary Power System Back Up Auxiliary Power System BackUp - This output, when energized, will drive the motor operated switch-gear associated with the Auxiliary Power System (APS) to the BackUp connection mode. Auxiliary Power System Ground Relay Reset APS Ground Relay Reset Auxiliary Power System Inverter Cut-Out Auxiliary Power System Inverter Cut-Out - Inverter Cutout Solenoid - A TRUE value causes the cutout solenoid to activate. This will cause the inverter to be cutout if the APS / DCL switchgear passes though the middle position while this output is ener Auxiliary Power System Isolation Feedback Auxiliary Power System Isolate Auxiliary Power System - Normal Mode Auxiliary Power System Normal - This output, when energized, will drive the motor operated switch-gear associated with the Auxiliary Power System (APS) to the Normal connection mode. Alarm Relay Feedback: a value if TRUE indicates that the AR relay is picked up. Alarm Relay: A TRUE value causes the relay to close. archive_reset - &archive_index_rear Start date for the remote archive transfer, a time_t variable. Ref EDPS 400 5.4.31. A TRUE indication means that the archive fault data structure is to be included with the header. Ref EDPS 400 5.4.31. A TRUE indication means that the archive fault text is to be included with the header. Ref EDPS 400 5.4.31. Air Start Pressure Switch: A value of TRUE indicates that some pressure has reached some level indicating something needs to be done. ?????????? AT_bec - &AT_bec AT_field - &AT_field AT_gcc - &AT_gcc AT_ipc - &AT_ipc SIGNAL DESCRIPTIONS B-6

AT_Pr ATC CO<

ATC OK< ATEgIF ATImLbF ATImRbF AuxLts< AuxLts> AuxMsg AuxShHP AuxShPw AuxStat Av_Adh Av_EPN Av_WDi1 AWDDis< AWDDis> AWT AOF

AWT ROF

AWTF

AxAltAc Axl MPH Axl MPH

&AT_power &SIG_IO_STATE(ATC_CO)

AT_power - &AT_power Automatic Train Control Cut-Out - A TRUE value indicates that the ATC system on the locomotive has been cutout (via a manual switch). This switch info is typically passed along to ICE ... &SIG_IO_STATE(ATC_OK) Automatic Train Control OK Input - a TRUE value indicates that the ATC system on the locomotive is considered in a health status of OK. &ANA_IN_SLOW(ATEGI) Air temperature into the engine &ANA_IN_SLOW(ATIMLB) Air temperature at the engine's left bank intake manifold. &ANA_IN_SLOW(ATIMRB) Air temperature at the engine's right bank intake manifold. &SIG_IO_STATE(AUXLTS) Some kind of Auxiliary Lights Relay feedback &SIG_IO_STATE(AUXLTS) Auxiliary Lights Enable : A TRUE value indicates that the customer defined criteria is met for enabling the crossing or ditch lights. &STR_DEVICE(AUXMSG) These bytes present the displayed message for the health of the locomotive engine system. Ref EDPS 400 5.5.15. &ANA_IN_SLOW(AUX_SHAFT_P Auxiliary system shaft power feedback, displayed in units of HP WR) &ANA_IN_SLOW(AUX_SHAFT_P Auxiliary system shaft power feedback WR) &DISCRETE_OUT(AUXSTAT) This byte indicates the health of the locomotive auxiliary system. Ref EDPS 400 5.5.1. &average_adhesion avg_adh - &average_adhesion &average_e_per_n_slow epern_avg - &average_e_per_n_slow &PROT_DATA(loco_avg_wheel_di avg_whl_dia1 - &avg_wheel_diameter ameter) &SIG_IO_STATE(AWDDIS) Automatic Water Drain Disable: a TRUE value indicates that the AWDDis relay is picked up. &SIG_IO_STATE(AWDDIS) Auto Water Drain Disable &ANA_IN_SLOW(AWT_AO) Aftercooler Water Temperature at the Aspirator: The engine aftercooler water temperature after the water has been mixed via the linking valve. This signal is used with the AWT RO and ETP signals as a threesome. &ANA_IN_SLOW(AWT_RO) Aftercooler Water Temperature at the Radiator Output: The engine aftercooler water temperature at the output of the aftercooler radiator. This water temperature is before engine water can be added via the linking valve. This signal is used with the AWT A &ANA_IN_SLOW(AWT) Aftercooler Water Temperature: The engine aftercooler water temperature measured just before the pump. This signal is used with the ETP and ETP_OCO signals as a threesome in One Radiator Bank Per Loop Cooling System. &axle_alt_acceleration axle_alt_ac - &axle_alt_acceleration &axle_alt_train_speed Axle speed signal &axle_alt_loco_speed Axle speed signal SIGNAL DESCRIPTIONS B-7

AxlAlt

&ANA_IN_SLOW(AXLALT)

AxlAltH

&ANA_IN_SLOW(AXLALTH)

AxSpdSr B Valv> B< B> B_1<

&axle_spd_source &SIG_IO_STATE(B_VALV) &SIG_IO_STATE(B) &SIG_IO_STATE(B) &SIG_IO_STATE(B_1)

B_1> B_2<

&SIG_IO_STATE(B_1) &SIG_IO_STATE(B_2)

B_2> B_Stu B1< B1> B2< B2> B3< B3> B4< B4> BaHt<

&SIG_IO_STATE(B_2) &b_status &SIG_IO_STATE(B1) &SIG_IO_STATE(B1) &SIG_IO_STATE(B2) &SIG_IO_STATE(B2) &SIG_IO_STATE(B3) &SIG_IO_STATE(B3) &SIG_IO_STATE(B4) &SIG_IO_STATE(B4) &SIG_IO_STATE(BAHT)

BAHT> BAOvrd< Bar Prs

&SIG_IO_STATE(BAHT) &SIG_IO_STATE(BAOVRD) &ANA_IN_SLOW(BAR_PRS)

Bar Prs BatHtr> Batt V BatV1

&ANA_IN_SLOW(BAR_PRS) &SIG_IO_STATE(BATHTR) &ANA_IN_SLOW(BATT_V) &ANA_IN_SLOW(BATV[0])

BatV2

&ANA_IN_SLOW(BATV[1])

120 teeth/rev, Locomotive Axle Speed. Uses the divide by 8 mode to provide better resolution at low speeds. 120 teeth/rev, Locomotive Axle Speed. Uses the normal mode to provide better resolution at high speeds. axl_spd_source - &axle_spd_source Governor B Valve: A value of TRUE activates the governor's B valve. B Contactor Feedback: A value of TRUE indicates the B contactor is in the closed position. B Contactor: A value of TRUE closes the contactor. B_1 DE/DM Contactor Feedback: A value of TRUE indicates the B1 contactor is in the closed position. B_1 DE/DM Contactor: A value of TRUE causes the contactor to close. B_1 DE/DM Contactor Feedback: A value of TRUE indicates the B1 contactor is in the closed position. B_2 DE/DM Contactor: A value of TRUE causes the contactor to close. b_status - &b_status B1 Contactor Feedback: A value of TRUE indicates the B1 contactor is in the closed position. B1 Contactor: A value of TRUE causes the contactor to close. B2 Contactor Feedback: A value of TRUE indicates the B2 contactor is in the closed position. B2 Contactor: A value of TRUE causes the contactor to close. B3 Contactor Feedback: A value of TRUE indicates the B3 contactor is in the closed position. B3 Contactor: A value of TRUE causes the B3 contactor to close. B4 Contactor Feedback: A value of TRUE indicates the B4 contactor is in the closed position. B4 Contactor: A value of TRUE causes the B4 contactor to close. Battery Heater Relay Feedback - a TRUE value indicates that the BaHt (or BatHtr) relay is picked up. Battery Heating Pad Contactor: A value of TRUE causes the contactor to close. Brakes Applied Traction Inhibit Override DON'T USE, REL 8+, Barometric pressure. The units says Pascal's but the scale factor is actually for mmHG. Barometric pressure: Pascal Version & Up. Currently not Used. Battery voltage (using former LR [load regulator] input into ADA). Battery voltage as detected by EMDEC ECM #1. Since EMDEC is powered off a 24 Volt power supply, it is not really locomotive battery voltage. Battery voltage as detected by EMDEC ECM #2. Since EMDEC is powered off a 24 Volt power supply, it is not really locomotive battery voltage. SIGNAL DESCRIPTIONS B-8

BatV3

&ANA_IN_SLOW(BATV)

Bb_req BBActv>

&blended_brake_request &SIG_IO_STATE(BBACTV)

BBNtCO<

&SIG_IO_STATE(BBNTCO)

BC_Pres

&ANA_IN_SLOW(BC_PRES)

BC1 A

&ANA_IN_SLOW(BC1_A)

BC2 A

&ANA_IN_SLOW(BC2_A)

BCB2<

&SIG_IO_STATE(BCB2)

BCFBOK<

&SIG_IO_STATE(BCFBOK)

BChgCB< BCP RqP BCPrLm BCPS<

&SIG_IO_STATE(BCHGCB) &ANA_OUT(BCP_RQ) &bc_power_limit &SIG_IO_STATE(BCPS)

BE Req% BE_Ref BeF_des BEFbklb Bell<

&be_request_ratio &brake_effort_ref &be_tm_field_current_desired &dbe_fb &SIG_IO_STATE(BELL)

BellOn<

&SIG_IO_STATE(BELLON)

BelNOf<

&SIG_IO_STATE(BELNOF)

BelRly< BERfklb BH_Sup BHP_PLm

&SIG_IO_STATE(BELRLY) &dbe_ref &DISCRETE_IN(BH_SUP) &bhp_power_limit

Battery voltage as detected by EMDEC ECM #3. Since EMDEC is powered off a 24 Volt power supply, it is not really locomotive battery voltage. bb_req - &blended_brake_request Blended Brake Active Signal sent to the MABS. A TRUE value indicates that blended brake is active. Blended Brake Not Cut-Out: A value of TRUE indicates that the blended brake system is enabled. Indication of Brake Cylinder Pressure from the Microprocessor Air Brake (MAB) system through the serial link. The current flowing from battery charger #1 to the locomotive batteries. 1st Used LIRR DE30AC. Using transducer P/N 40046384, and an ADA internal 40.2 Ohm burden resistor. The current flowing from battery charger #2 to the locomotive batteries. 1st Used LIRR DE30AC. Using transducer P/N 40046384, and an ADA internal 40.2 Ohm burden resistor. Brake Cylinder Pressure in Bogie #2. First used on Queensland GT42CU-AC Locomotives (order no. 969160). EM2000 to ICE for display purposes. Automatic Brake Cylinder Pressure Feedback Valid bit sent from Micro Air Brake System. A TRUE value indicates that a valid signal exists for brake cylinder pressure feedback. BChgCB - Battery Charger Circuit Breaker Feedback Brake Cylinder Pressure Request sent to the MABS. bc_pwr_lim - &bc_power_limit Brake Cylinder Pressure Switch. Asserted (HIGH) when brake cylinder pressure exceeds 23 p.s.i. Used with DB/Emergency. interlock extra. The percentage of total brake effort above the in-shot being requested by the operator. brk_eff_ref - &brake_effort_ref be_tmfld_des - &be_tm_field_current_desired Dynamic brake effort feedback A TRUE input indicate that the pneumatic bell on the locomotive has been requested by the locomotive operator. This input is used to signal ICE that the bell is on. A TRUE input indicates that the operator has requested that the output controlling the ringing of the Bell be turned on. This is different than the BELL input in that this input will only be TRUE when the operator presses the bell button, whereas the BEL A FALSE input indicates that the operator has requested that the output controlling the ringing of the Bell be turned off. Indication that the Bell relay is picked up Dynamic brake effort reference The air brake handle in the suppression position will cause this bit to be set. BHP_POWER_LM - &bhp_power_limit SIGNAL DESCRIPTIONS B-9

BI_Adr BI_OFF BI1Sc BIL Cl< BIL Cl> BIL Op< BIL Op> BIL1CO< BIL1CO> BIL2CO< BIL2CO> BIL3CO< BIL3CO> BLC< BLC> BLD< BLD> Bnk2fix Bo_cali Bo_CalO Bo_FldV BO0_Adr BO0_OFF BO0_Sc BO1_Adr BO1_OFF

&bode_analog_input_map[0].contr ol_buffer &bode_analog_input_map[0].offset &bode_analog_input_map[0].scale _factor &SIG_IO_STATE(BIL_CL)

BI_ADDR - &bode_analog_input_map[0].control_buffer BI_OFF - &bode_analog_input_map[0].offset BI1_SCALE - &bode_analog_input_map[0].scale_factor

Boost Inductor Link Closed Feedback: A TRUE value indicates that the BIL switch-gear is in the closed position. &SIG_IO_STATE(BIL_CL) Boost Inductor Link Close, used on DM Locomotives. &SIG_IO_STATE(BIL_OP) Boost Inductor Link Open Feedback: A TRUE value indicates that the BIL switch-gear is in the open position. &SIG_IO_STATE(BIL_OP) Boost Inductor Link Open, used on DM Locomotives. &SIG_IO_STATE(BIL1CO) Boost Inductor Link #1 Cut-Out &SIG_IO_STATE(BIL1CO) Boost Inductor Link #1Cutout, used on DM Locomotives. &SIG_IO_STATE(BIL2CO) Boost Inductor Link #2 Cut-Out &SIG_IO_STATE(BIL2CO) Boost Inductor Link #2Cutout, used on DM Locomotives. &SIG_IO_STATE(BIL3CO) Boost Inductor Link #3 Cut-Out &SIG_IO_STATE(BIL3CO) Boost Inductor Link #3Cutout, used on DM Locomotives. &SIG_IO_STATE(BLC) Battery Load Connect: A TRUE value indicates that the BLC contactor has picked up. &SIG_IO_STATE(BLC) Battery Load Connect &SIG_IO_STATE(BLD) Battery Load Disconnect: A TRUE value indicates that the BLD contactor has picked up. &SIG_IO_STATE(BLD) Battery Load Disconnect &bank_to_fix bank2fix - &bank_to_fix &bode_cal_in bode_cali - &bode_cal_in &bode_out_cal bode_calo - &bode_out_cal &bode_field_voltage bode_fld_vol - &bode_field_voltage &bode_analog_output_map[0].cont BO0_ADDR - &bode_analog_output_map[0].control_buffer rol_buffer &bode_analog_output_map[0].offs BO0_OFF - &bode_analog_output_map[0].offset et &bode_analog_output_map[0].scal BO0_SCALE - &bode_analog_output_map[0].scale_factor e_factor &bode_analog_output_map[1].cont BO1_ADDR - &bode_analog_output_map[1].control_buffer rol_buffer &bode_analog_output_map[1].offs BO1_OFF - &bode_analog_output_map[1].offset et


BO1_Sc BO2_Adr BO2_OFF BO2_Sc Bode1 BOI1 BOI2 BOI3 BP_Pres BPP_Vld BrApld< BrFail< BrFail< Brk Req Brk Req Brk8dat BRKA< BRKA> BrkApA< BrkApB< BRKAPL< BrkComp BRKR< BRKR>

&bode_analog_output_map[1].scal e_factor &bode_analog_output_map[2].cont rol_buffer &bode_analog_output_map[2].offs et &bode_analog_output_map[2].scal e_factor &ANA_IN_SLOW(BODE1) &ANA_IN_SLOW(BOI[0])

BO1_SCALE - &bode_analog_output_map[1].scale_factor BO2_ADDR - &bode_analog_output_map[2].control_buffer BO2_OFF - &bode_analog_output_map[2].offset BO2_SCALE - &bode_analog_output_map[2].scale_factor

Bode Input 1: This is a spare input channel that can be used for testing purposes. Injector Timing, beginning of injection in degrees from top dead center, from ECM #1 Always degrees NEVER radians hence it is unitless &ANA_IN_SLOW(BOI[1]) Injector Timing, beginning of injection in degrees from top dead center, from ECM #2, Always in degrees NEVER in radians, hence unitless &ANA_IN_SLOW(BOI) Injector Timing, beginning of injection in degrees from top dead center, from ECM #3, always in degrees NEVER in radians, hence unitless &ANA_IN_SLOW(BP_PRES) Brake Cylinder Pressure signal coming from microprocessor air brake system via serial link. &SIG_IO_STATE(BPP_VLD) Brake Pipe Pressure Validation signal coming from microprocessor air brake system via serial link. Indicates whether the BP_Pres signal is valid. &SIG_IO_STATE(BRAPLD) Brake Applied Trainline &SIG_IO_STATE(BRFAIL) A value of TRUE indicates that the air brake system's computer has determined that air brakes have failed. &SIG_IO_STATE(BRFAIL) Brake Fail Indication bit sent from Micro Air Brake System. A TRUE value indicates that the Micro Air System is in a FAILED state. &rated_brake_handle_request Rated 24T &rated_brake_handle_request Rated 24T &RUN_TOT_DATA(rt_data.lifetime brk8_data - &RUN_TOT_DATA(rt_data.lifetime_throt_record[16]) _throt_record[16]) &SIG_IO_STATE(BRKA) Parking Brake Apply Relay: A TRUE value indicates the relay in the closed position. &SIG_IO_STATE(BRKA) Parking Brake Apply Contactor (SD80/90MAC) &SIG_IO_STATE(BRKAPA) Parking Brake Apply Cab A: A value of TRUE indicates that the Park Brake Apply Switch #1 has been activated in Cab #1. SWG &SIG_IO_STATE(BRKAPB) Parking Brake Apply Cab B: A value of TRUE indicates that the Park Brake Apply Switch #2 has been activated in Cab #2. SWG &SIG_IO_STATE(BRKAPL) Parking Brake Motor Application Request (SD80/90MAC) &brake_complete brk_complete - &brake_complete &SIG_IO_STATE(BRKR) Parking Brake Release Relay: A TRUE value indicates the relay in the closed position. &SIG_IO_STATE(BRKR) Parking Brake Release Contactor (SD80/90MAC) SIGNAL DESCRIPTIONS B-11

BRKREL< BrkRlA<

&SIG_IO_STATE(BRKREL) &SIG_IO_STATE(BRKRLA)

BrkRlB<

&SIG_IO_STATE(BRKRLB)

BrRlsd< Bus_err BW 20T<

&SIG_IO_STATE(BRRLSD) &bus_error_count &SIG_IO_STATE(BW_20T)

BWR<

&SIG_IO_STATE(BWR)

BWR> Bwr_Ter C FPSw<

&SIG_IO_STATE(BWR) &blower_path_term &SIG_IO_STATE(C_FPSW)

C Valv> CA CTA1

&SIG_IO_STATE(C_VALV) &ANA_IN_SLOW(CA_CTA1)

CA CTA2

&ANA_IN_SLOW(CA_CTA2)

CA Full CA V CA V

&ANA_IN_SLOW(CA_FULL) &ANA_IN_SLOW(CA_V) &ANA_IN_SLOW(CA_V)

Cab1< Cab1> Cab1Rq<

&SIG_IO_STATE(CAB1) &SIG_IO_STATE(CAB1) &SIG_IO_STATE(CAB1RQ)

Cab2< Cab2> Cab2Rq<

&SIG_IO_STATE(CAB2) &SIG_IO_STATE(CAB2) &SIG_IO_STATE(CAB2RQ)

Parking Brake Motor Release Request (SD80/90MAC) Parking Brake Release Cab A: A value of TRUE indicates that the Park Brake Release Switch #1 has been activated in Cab #1. SWG Parking Brake Release Cab B: A value of TRUE indicates that the Park Brake Release Switch #2 has been activated in Cab #2. SWG Brake Released Trainline bus_errors - &bus_error_count Trainline 20T: Trainlined brake warning indication. A TRUE value indicates a brake warning condition. Brake Warning Relay Feedback: A TRUE value indicates the relay is in the closed position and therefore indicating a warning condition. Brake Warning Relay: A value of TRUE causes the relay to close. blwr_term - &blower_path_term Control and Fuel Pump Switch: A TRUE indicates that the consist operators console switch is on. Governor C Valve: A value of TRUE activates the governor's C valve. Companion Alternator CT #1 current ... this input provides a current that is proportional to the total current in phase 1 of the companion alternator. This value is used for CA Load Management. Companion Alternator CT #2 current ... this input provides a current that is proportional to the total current in phase 2 of the companion alternator. This value is used for CA Load Management. The period of the companion alternator's AC voltage. AC System : Companion Alternator Voltage DC System : Companion Alternator Voltage. Was in fast loop, moved to medium loop where it belongs, 5/4/98. Cab 1 Active Relay Feedback For Two Cab Locomotives. First Used On JT42C Basic. Relay output for number one cab active on dual cab EM2000 locomotives. Cab #1 Request - A TRUE value indicates that a request is being made for the #1 Cab to be switched in as the Controlling Cab (aka HOT Cab). This is used on a multi-cab loco, with dual cab request inputs. [1st Used - LIRR DE30AC] Cab 2 Active Relay Feedback For Two Cab Locomotives. First Used On JT42C Basic. Relay output for number two cab active on dual cab EM2000 locomotives. Cab #2 Request - A TRUE value indicates that a request is being made for the #2 Cab to be switched in as the Controlling Cab (aka HOT Cab). This is used on a multi-cab loco, with dual cab request inputs. [1st Used - LIRR DE30AC]


CabKey<

&SIG_IO_STATE(CABKEY)

CabPrsP CabSel<

&ANA_OUT(CABPRS) &SIG_IO_STATE(CABSEL)

CabSlA<

&SIG_IO_STATE(CABSLA)

CabSlB<

&SIG_IO_STATE(CABSLB)

CabStr<

&SIG_IO_STATE(CABSTR)

CAF<

&SIG_IO_STATE(CAF)

CAF>

&SIG_IO_STATE(CAF)

CalcMPH CalcRPM CallOK<

&calculated_train_speed &calculated_rpm &SIG_IO_STATE(CALLOK)

CCapInt CCE< CCS<

&cooling_capacity_integrator &SIG_IO_STATE(CCE) &SIG_IO_STATE(CCS)

CDB< CDF< CHP EFF CLD<

&SIG_IO_STATE(CDB) &SIG_IO_STATE(CDF) &ANA_IN_SLOW(CHP_EFF) &SIG_IO_STATE(CLD)

CLOPS<

&SIG_IO_STATE(CLOPS)

CLTP< CLTP>

&SIG_IO_STATE(CLTP) &SIG_IO_STATE(CLTP)

CM Attn

&cm_attenuation

Cab Control Key Input - This input indicates that the control key at the cab console has been inserted and moved to the active control position. Additional logic is needed to determine if the selected console controls will be enabled. (1st implemented u The absolute air pressure as measured in the electrical control cabinet. Operator switch input for selecting "hot" cab of two cab locomotives. Input "ON" (high) indicates CAB 1 is to be in control. Input "OFF" (low) indicates CAB 2 is to be in control. Cab Select 1: A value of TRUE indicates that Cab #1 has been selected as the active cab. (Ref 3.43) SWG/JFK Cab Select 2: A value of TRUE indicates that Cab #2 has been selected as the active cab. (Ref 3.43) SWG/JFK CabStr Feedback: A TRUE value indicates the switch is in the closed position and therefore indicating cab start of the engine is being requested.. Companion Alternator field Flash contactor feedback: A value of TRUE indicates that the CA Field Flashing contactor is closed. Companion Alternator field Flash contactor: A value of TRUE causes the CA Field Flashing contactor to close. This connects the battery to the CA field in order to start the Auxiliary Power Converter started. Calculated traction motor speed Calculated traction motor rpm Call Pressure Valid bit sent from Micro Air Brake System. A TRUE value indicates a valid call pressure reading is available. cool_cap_int - &cooling_capacity_integrator Cab Control Enable Relay Feedback - a TRUE value indicates that the CCE relay is picked up. Compressor Control Switch: Used to sense main reservoir air pressure. A value of FALSE indicates a low air pressure condition. A value of TRUE indicates that the main reservoir air pressure is nominal. Car Detect B-End Input Car Detect F-End Input The instantaneous operational efficiency of the Copper - Used for third rail mode operation. Compatible Locomotive Detector digital input for Standard LCC Controlled HEP Type. A value of TRUE indicates that a locomotive of the same model is MU'ed, and has HEP powered. Compressor Low Oil Protection Switch. A value of TRUE indicates the presence of a low oil condition in the air compressor. Crossing Lights Relay Feedback - a TRUE input indicates that the relay is picked up. Crossing Lights Enable .(previously CRSLT8): A TRUE value indicates that the locomotive speed is greater than the speed that which the Crossing Lights shall flash when horn is blown. CM attenuation - current maximize for DC adhesion system SIGNAL DESCRIPTIONS B-13

CmpSyn< CmpSyn> CMtrRPM CndHrn< CntlCB< CNW CO< ComPres CompRPM CpPwCap CpPwCSt CRL<

CrpSndR CSAck<

CSNPen<

Cu_temp CycleK Cyl Ref D AV< D AV> D BV< D BV>

&SIG_IO_STATE(CMPSYN)

Compressor Synchronization Relay Feedback. A value of TRUE indicates that the CmpSyn relay is picked up. &SIG_IO_STATE(CMPSYN) Compressor Synchronization output. A value of TRUE indicates that a request is being made to provide compressor synchronization via the Trainline. &ANA_IN_SLOW(CALC_MOTOR_ The maximum calculated motor RPM signal. RPM) &SIG_IO_STATE(CNDHRN) Conductor's Horn: a TRUE value indicates that the Horn button at the Conductor's station has been pressed. (First implemented with Dual Horn Inputs EDL) &SIG_IO_STATE(CNTLCB) Control Circuit Breaker: A TRUE value indicates that the control circuit breaker is in the on position. &SIG_IO_STATE(CNW_CO) CNW Cab Signal Cut-Out &com_present com_present - &com_present &ANA_IN_SLOW(COMPRPM) The Air Compressor speed in RPM. &chopper_power_capability The Chopper power capability, or what the Chopper is capable of making. &chopper_power_capability_status The Chopper power capability status. &SIG_IO_STATE(CRL) Compressor Relay: Used to provide synchronization of all air compressors within a consist. A value of TRUE indicates a trainline request for air. A value of FALSE indicates no trainline request for air. &creep_sand_request crp_snd_req - &creep_sand_request &SIG_IO_STATE(CSACK) Cab Signal Acknowledge: A TRUE value indicates that the Cab Signal system has been acknowledged by the operator in any cab. First used on EW&S JT42CWR for AWS Reset operation. &SIG_IO_STATE(CSNPEN) CAb Signal No Penalty Request: A TRUE value indicates that no request for a penalty brake application from the Cab Signal system has been received. First used on EW&S JT42CWR for AWS penalty requests. &PROT_DATA(copper_temperatur copper_temp - &PROT_DATA(copper_temperature[0]) e[0]) &cycle_count rec_cycle - &cycle_count &cyl_ref Blended brake cylinder reference. &SIG_IO_STATE(D_AV) Distributed Power "A" Valve Relay Feedback. Typically connected to 15T. Equivalent to TH2468 Controller Mech. switch. &SIG_IO_STATE(D_AV) Distributed Power "A" Valve Relay Output. Relay typically connected to 15T. Equivalent to TH2468 Controller Mech. switch. &SIG_IO_STATE(D_BV) Distributed Power "B" Valve Relay Feedback. Relay typically connected to 12T. Equivalent to TH 5-8 Controller Mech. switch. &SIG_IO_STATE(D_BV) Distributed Power "B" Valve Relay Output. Relay typically connected to 12T. Equivalent to TH 5-8 Controller Mech. switch. SIGNAL DESCRIPTIONS B-14

D CV<

&SIG_IO_STATE(D_CV)

D CV>

&SIG_IO_STATE(D_CV)

D DBON<

&SIG_IO_STATE(D_DBON)

D DBON>

&SIG_IO_STATE(D_DBON)

D DBSU<

&SIG_IO_STATE(D_DBSU)

D DBSU>

&SIG_IO_STATE(D_DBSU)

D DV<

&SIG_IO_STATE(D_DV)

D DV>

&SIG_IO_STATE(D_DV)

D ER<

&SIG_IO_STATE(D_ER)

D ER>

&SIG_IO_STATE(D_ER)

D FOR<

&SIG_IO_STATE(D_FOR)

D FOR>

&SIG_IO_STATE(D_FOR)

D GF<

&SIG_IO_STATE(D_GF)

D GF>

&SIG_IO_STATE(D_GF)

D PBAP<

&SIG_IO_STATE(D_PBAP)

Distributed Power "C" Valve Relay Feedback. Relay typically connected to 7T. Equivalent to TH 3-8 Controller Mech. switch. Distributed Power "C" Valve Relay Output. Relay typically connected to 7T. Equivalent to TH 3-8 Controller Mech. switch. Distributed Power (Dynamic) Brake On Relay Output. Relay typically connected to 21T. Equivalent to BKS_BG Controller Mech. switch, which closes when DB handle is moved past "set-up". Distributed Power Dynamic Brake On Relay Output. Relay typically connected to 21T. Equivalent to BKS_BG Controller Mech. switch, which closes when DB handle is moved past "set-up". Distributed Power Dynamic Brake Setup Relay Feedback. Relay typically connected to 17T. Equivalent to BKS_B Controller Mech. switch, which closes when the DB handle is in "setup" or beyond.. Distributed Power Dynamic Brake Setup Relay Output. Relay typically connected to 17T. Equivalent to BKS_B Controller Mech. switch, which closes when the DB handle is in "setup" or beyond. Distributed Power "D" Valve Relay Feedback. Relay typically connected to 3T. Equivalent to TH ST56 Controller Mech. switch. Distributed Power "D" Valve Relay Output. Relay typically connected to 3T. Equivalent to TH ST56 Controller Mech. switch. Distributed Power Engine Run Relay Feedback. Relay typically connected to 16T. Equivalent to Engine Run control stand switch. Distributed Power Engine Run Relay Output. Relay typically connected to 16T. Equivalent to Engine Run control stand switch. Distributed Power Forward Relay Feedback. Relay typically connected to 8T/9T. Equivalent to RHS_F Controller Mech. switch (produces forward locomotive motion, as viewed from engineer's seat). Distributed Power Forward Relay Output. Relay typically connected to 8T/9T. Equivalent to RHS_F Controller Mech. switch (produces forward locomotive motion, as viewed from engineer's seat). Distributed Power GenFieldRequest Relay Feedback. Relay typically connected to 6T. Equivalent to TH1-8 Controller Mech. switch (sort of). Distributed Power GenFieldRequest Relay Output. Relay typically connected to 6T. Equivalent to TH1-8 Controller Mech. switch (sort of). First used on Queensland GT42CU-AC locomotives. This relay will be momentarily energized on remote units to apply the parking brake and, on the Queensland locomotives, is connected to the 27T trainline.


D PBAP>

&SIG_IO_STATE(D_PBAP)

D PBRL<

&SIG_IO_STATE(D_PBRL)

D PBRL>

&SIG_IO_STATE(D_PBRL)

D REV<

&SIG_IO_STATE(D_REV)

D REV>

&SIG_IO_STATE(D_REV)

D SC<

&SIG_IO_STATE(D_SC)

D SC>

&SIG_IO_STATE(D_SC)

D SND<

&SIG_IO_STATE(D_SND)

D SND>

&SIG_IO_STATE(D_SND)

D SP<

&SIG_IO_STATE(D_SP)

D SP>

&SIG_IO_STATE(D_SP)

D SP2>

&SIG_IO_STATE(D_SP2)

D Valv> D2A_tab

&SIG_IO_STATE(D_VALV) &d2a_table

Date DB 17T<

¤t_time &SIG_IO_STATE(DB_17T)

DB 21T<

&SIG_IO_STATE(DB_21T)

DB F Rf

&tm_field_current_ref

First used on Queensland GT42CU-AC locomotives. This relay will be momentarily energized on remote units to apply the parking brake and, on the Queensland locomotives, is connected to the 27T trainline. First used on Queensland GT42CU-AC locomotives. This relay will be momentarily energized on remote units to release the parking brake and, on the Queensland locomotives, is connected to the 26T trainline. First used on Queensland GT42CU-AC locomotives. This relay will be momentarily energized on remote units to release the parking brake and, on the Queensland locomotives, is connected to the 26T trainline. Distributed Power Reverse Relay Feedback. Relay typically connected to 9T/8T. Equivalent to RHS_R Controller Mech. switch (produces backward locomotive motion, as viewed from engineer's seat). Distributed Power Reverse Relay Output. Relay typically connected to 9T/8T. Equivalent to RHS_R Controller Mech. switch (produces backward locomotive motion, as viewed from engineer's seat). Distributed Power Speed Control Request Relay Feedback. Relay typically connected to 1T. Equivalent to SSCR relay (sort of). Distributed Power Speed Control Request Relay Output. Relay typically connected to 1T. Equivalent to SSCR relay (sort of). Distributed Power Sand Relay Feedback. Relay typically connected to 23 (though connected to other TL's by EDL). Equivalent to trainlined sand switch. Distributed Power Sand Relay Output. Relay typically connected to 23 (though connected to other TL's by EDL). Equivalent to trainlined sand switch. Distributed Power Installed Spare #1 Relay Feedback. Relay typically connected to nothing. Equivalent to nothing. Distributed Power Installed Spare #1 Relay Output. Relay typically connected to nothing. Equivalent to nothing. Distributed Power Installed Spare #2 Relay Output. Relay typically connected to nothing. Equivalent to nothing. Governor D Valve: A value of TRUE activates the governor's D valve. The D-to-A task database table. It is an array of structures, one for each of the D-to-A channels supported by the system. This is the current date signal. Trainline 17T: A TRUE value indicates a request from the consist operators console to set the locomotive up for dynamic brake operation. Trainline 21T: A TRUE value indicates a request from the operators console for loading in dynamic brake. Dynamic brake field current reference SIGNAL DESCRIPTIONS B-16

DB G Rf DB Lt> DB_GC< DB_GC>

&grid_current_ref &SIG_IO_STATE(DB_LT) &SIG_IO_STATE(DB_GC) &SIG_IO_STATE(DB_GC)

DBBFA> DBBFAB< DBBSS< DBBSS> DBFld A DBGBCB<

&SIG_IO_STATE(DBBFA) &SIG_IO_STATE(DBBFAB) &SIG_IO_STATE(DBBSS) &SIG_IO_STATE(DBBSS) &mg_a_slow &SIG_IO_STATE(DBGBCB)

DBGC<

&SIG_IO_STATE(DBGC)

DBMsg

&STR_DEVICE(DBMSG)

DBNCOA<

&SIG_IO_STATE(DBNCOA)

DBNCOB<

&SIG_IO_STATE(DBNCOB)

DBNtCO<

&SIG_IO_STATE(DBNTCO)

DBOnly<

&SIG_IO_STATE(DBONLY)

DBPrLm DBStat DBTqLm DC_Fld DC_Gcc DC_Pr DC1< DC1> DC1A<

&db_power_limit &DISCRETE_OUT(DBSTAT) &db_torque_limit &dc_gain_boost_field &dc_gain_boost_gcc &dc_gain_boost_power &SIG_IO_STATE(DC1) &SIG_IO_STATE(DC1) &SIG_IO_STATE(DC1A)

Dynamic brake grid current reference Electronic Throttle Controller Dynamic Brake Mode Light output. DGBC I/O - Dynamic Brake Ground Connection Relay input. Leave "-" in. Dynamic Brake Ground Connection contactor. Leave "_" in. The "_" has been taken out until sw is told! Dynamic Brake Blower Fast Speed Contactor - [1st used - LIRR DE30AC] Dynamic Brake Grid Blower High Speed Contactors A & B Feedback Dynamic Brake Grid Blower Slow Speed Feedback Dynamic Brake Blower Slow Speed Contactor - [1st Used - LIRR DE30AC] Dynamic brake field current feedback. Dynamic Brake Grid Blower Circuit Breaker Feedback - a TRUE value indicates that the circuit breaker for the dynamic brake grid blower motor is CLOSED. DCL Piloted Relay - Dynamic Brake Ground Connection relay feedback. Used on the platform locomotives. A value of TRUE indicates that the DBGC relay has picked up, completing the dynamic brake ground reference circuit. This relay is controlled by DCL-C These bytes present the displayed message for the health of the locomotive HEP system. Ref EDPS 400 5.5.21. Dynamic Brake Cutout Switch In No. 1 Cab Of Two Cab Locomotives. First Used On JT42C Basic. Dynamic Brake Cutout Switch In No. 2 Cab For Two Cab Locomotives. First Used On JT42C Basic. Dynamic Brake Not Cutout: A TRUE value indicates the input from the Dynamic Brake Cutout Switch on the control panel is in the Not Cutout position. TRUE input on AC locomotive prevents unit from loading in Power and keeps engine speed in Idle when throttle is between 1 and 8. TRUE input on DC locomotive maintains throttle one loading and throttle one engine speed anytime the throttle is between 1 an db_pow_lim - &db_power_limit This byte indicates the health of the locomotive dynamic brake system. Ref EDPS 400 5.5.16. db_tor_lim - &db_torque_limit dc_gain_bf - &dc_gain_boost_field dc_boost_gcc - &dc_gain_boost_gcc dc_boost_pwr - &dc_gain_boost_power DC1 Contactor Feedback: A TRUE value indicates the DC1 contactor is in the closed position. Dynamic Brake Extended Range Contactor #1: A value of TRUE closes the contactor DC1 Auxiliary Contactor Feedback: A TRUE value indicates DC1 auxiliary contactor is in the closed position.


DC1A> DC2< DC2> DC2A< DC2A> DCCl< DCCl> Dcl A DCL V DCL1V Dcl1Vlt DCL2V Dcl2Vlt DCLCB< DclRSt DclRSts DCNCO< DCNCO> DCOp<

DCOp> DCR< DCR> DDesSpd DDetec< DE Step

&SIG_IO_STATE(DC1A) &SIG_IO_STATE(DC2) &SIG_IO_STATE(DC2) &SIG_IO_STATE(DC2A)

Dynamic Brake Extended Range Auxiliary Contactor #1: A value of TRUE closes the contactor DC2 Contactor Feedback: A TRUE value indicates the DC2 contactor is in the closed position. Dynamic Brake Extended Range Contactor #2: A value of TRUE closes the contactor DC2 Auxiliary Contactor Feedback: A TRUE value indicates DC2 auxiliary contactor is in the closed position. &SIG_IO_STATE(DC2A) Dynamic Brake Extended Range Auxiliary Contactor #2: A value of TRUE closes the contactor &SIG_IO_STATE(DCCL) DC Link Closed Feedback: A TRUE value indicates that the DCL switch-gear is in the closed position. This means that the inverters that are cut-in are electrically connected to the DC link. &SIG_IO_STATE(DCCL) DC Link Closed Switch-gear Output: A TRUE value will cause the DC link switch-gear to rotate toward the closed position. The closed position connects Cut-In inverters to the DC link. &dcl_current Signal is combination of MG_CT_A, 2-TCC_A and 2-GRID_A signals. This signal represents the amount of generator current. &ANA_IN_SLOW(DCL_V) The voltage across the DC link. &ANA_IN_SLOW(DCL1V) Voltage across the DC link as read ....... &ANA_IN_SLOW(DCL_VOLTAGE This calculated signal represents the DCLV feedback on different types of AC locomotives. [0]) &ANA_IN_SLOW(DCL2V) The voltage across the DC link as read .... &ANA_IN_SLOW(DCL_VOLTAGE This calculated signal represents the DCLV feedback on different types of AC locomotives. [1]) &SIG_IO_STATE(DCLCB) DC Link Control Circuit Breakers: A TRUE value indicates that the dc link control circuit breaker is in the on position. &dcl_ready_state dcl_rdy_st - &dcl_ready_state &dcl_ready_status dcl_rdy_sts - &dcl_ready_status &SIG_IO_STATE(DCNCO) DCLink Negative Cut-Out (???) &SIG_IO_STATE(DCNCO) DC Link Negative Cutout, used on DM Locomotives. &SIG_IO_STATE(DCOP) DC Link Open Feedback: A TRUE value indicates that the DCL switch-gear is in the open position. This means that the inverters are electrically isolated from the DC link. Inverters that are cut-in are electrically shorted to ground. &SIG_IO_STATE(DCOP) DC Link Open Switch-gear Output: A TRUE value will cause the DC link switch-gear to rotate toward the open position. The open position disconnects all inverters from the DC link. &SIG_IO_STATE(DCR) Feedback from air Dryer Control Relay. Air dryer functions while relay is picked up. Incorporated with analog Main Res., due to omission of CRL. &SIG_IO_STATE(DCR) Air Dryer Control Relay output. Asserting output picks up relay, which in turn activates the air dryer. Brought in with MDAC and analog MR Press. feedback. &display_desired_speed disp_des_spd - &display_desired_speed &SIG_IO_STATE(DDETEC) Detonator Detector System. A TRUE value indicates detection has been activated. &extended_range_step Extended range step (0 through 3) SIGNAL DESCRIPTIONS B-18

Delta N DEMIST<

&delta_n &SIG_IO_STATE(DEMIST)

Des_Spd DGRTst> DiaDis< DifTrp<

&desired_speed &SIG_IO_STATE(DGRTST) &SIG_IO_STATE(DIADIS) &SIG_IO_STATE(DIFTRP)

DigIn DigOut DirRSt DirRSts DP_dbon DP_dbsu DPB_Rat DPCOvr< DpcPrF1 DpcTqF2 DPhbtmr DPopmde DPrGF DPSCRat DPScSpd DPStu DPThReq DPThTmr DPTlImb DPTlmde DRA A<

&digital_input_buffer &digital_output_buffer &dir_ready_state &dir_ready_status &dp_dbon &dp_dbsu &dp_brake_ratio &SIG_IO_STATE(DPCOVR) &dpc_tcc_power_fb[0] &dpc_tcc_torque_fb[0] &dp_heartbeat_timer &dp_op_mode &dual_power_gain_factor &dp_trainline_load_ratio &dp_sc_set_speed &dp_status &dp_throttle_req &dp_throttle_timer &dp_trainline_load_imbalance &dp_trainline_load_mode &SIG_IO_STATE(DRA_A)

DRA B<

&SIG_IO_STATE(DRA_B)

DRAIso<

&SIG_IO_STATE(DRAISO)

DrBkOwn DrClos<

&drop_brake_owner &SIG_IO_STATE(DRCLOS)

Delta N Demister switch: A TRUE value indicates that the switch is in the closed position. Signal provided to ICE internal event recorder. FUO- GT46CWL desired_speed - &desired_speed Differential Ground Relay Test Display Disable: A FALSE value will disable functions of the display system. Differential Ground Relay Trip input. A TRUE value indicates that the differential current LEM has detected a ground condition. raw_digi_in - &digital_input_buffer raw_digi_out - &digital_output_buffer dir_rdy_st - &dir_ready_state dir_rdy_sts - &dir_ready_status dp_dbon - &dp_dbon dp_dbsu - &dp_dbsu dp_brk_rat - &dp_brake_ratio DB PCS Override switch Feedback: A TRUE value indicates that the DPC override is engaged. dpc_pwr_fb1 - &dpc_tcc_power_fb[0] dpc_tor_fb2 - &dpc_tcc_torque_fb[0] dp_hb_timer - &dp_heartbeat_timer dp_op_mode - &dp_op_mode dp_gain_fac - &dual_power_gain_factor dp_ssc_rat - &dp_trainline_load_ratio dp_sc_spd - &dp_sc_set_speed dp_status - &dp_status dp_th_req - &dp_throttle_req dp_th_timer - &dp_throttle_timer dp_tl_imb - &dp_trainline_load_imbalance dp_tl_mode - &dp_trainline_load_mode A TRUE value indicates a request from the operator to allow loading in no. 1 cab of two cab locomotives. First used on JT42HW-HS. The DRA switch will be pulled out in this state. A TRUE value indicates a request from the operator to allow loading in no. 2 cab of two cab locomotives. First used on JT42HW-HS. The DRA switch will be pulled out in this state. A TRUE value indicates a there is no request to override the DRA system. First used on JT42HW-HS. drp_brk_owner - &drop_brake_owner Door Closed: True value indicates that coach doors are closed. SIGNAL DESCRIPTIONS B-19

DrGrOwn DrGrtrg DrLdown DrLdtr DrOvrd< DSDP< DSDP> DSpdReq DStart< DTGov1D

DTGov1P

DTGov2D

DTGov2P

DTGov3D

DTGov3P

DTGov4D

DTGov4P

DTGov5D

&drop_grid_owner &drop_grid_trig &drop_load_owner &drop_load_trig &SIG_IO_STATE(DROVRD) &SIG_IO_STATE(DSDP)

drop_gr_own - &drop_grid_owner drop_gr_trg - &drop_grid_trig drop_ld_own - &drop_load_owner drop_ld_tr - &drop_load_trig Door Override: True value indicates that door override switch is closed. DSDP relay feedback: A TRUE value indicates that relay DSDP has been picked up. First used on EW&S JT42CWR. &SIG_IO_STATE(DSDP) DSD Penalty Relay: A TRUE value indicates a request to energize the DSDP relay. First used on EW&S JT42CWR. &display_speed_control_request disp_spd_req - &display_speed_control_request &SIG_IO_STATE(START) Derived Start Signal. &RUN_TOT_DATA(rt_data.lifetime Running Totals Lifetime distance traveled for dynamic brake governor notch 1. _throt_record[9][GOV_DATA].dista nce_traveled) &RUN_TOT_DATA(rt_data.lifetime Running Totals Lifetime distance traveled for power governor notch 1. _throt_record[7][GOV_DATA].dista nce_traveled) &RUN_TOT_DATA(rt_data.lifetime Running Totals Lifetime distance traveled for dynamic brake governor notch 2. _throt_record[10][GOV_DATA].dist ance_traveled) &RUN_TOT_DATA(rt_data.lifetime Running Totals Lifetime distance traveled for power governor notch 2. _throt_record[6][GOV_DATA].dista nce_traveled) &RUN_TOT_DATA(rt_data.lifetime Running Totals Lifetime distance traveled for dynamic brake governor notch 3. _throt_record[11][GOV_DATA].dist ance_traveled) &RUN_TOT_DATA(rt_data.lifetime Running Totals Lifetime distance traveled for power governor notch 3. _throt_record[5][GOV_DATA].dista nce_traveled) &RUN_TOT_DATA(rt_data.lifetime Running Totals Lifetime distance traveled for dynamic brake governor notch 4. _throt_record[12][GOV_DATA].dist ance_traveled) &RUN_TOT_DATA(rt_data.lifetime Running Totals Lifetime distance traveled for power governor notch 4. _throt_record[4][GOV_DATA].dista nce_traveled) &RUN_TOT_DATA(rt_data.lifetime Running Totals Lifetime distance traveled for dynamic brake governor notch 5. _throt_record[13][GOV_DATA].dist ance_traveled) SIGNAL DESCRIPTIONS B-20

DTGov5P

DTGov6D

DTGov6P

DTGov7D

DTGov7P

DTGov8D

DTGov8P

DTGovId

DTThr1P

DTThr2P

DTThr3P

DTThr4P

DTThr5P

&RUN_TOT_DATA(rt_data.lifetime _throt_record[3][GOV_DATA].dista nce_traveled) &RUN_TOT_DATA(rt_data.lifetime _throt_record[14][GOV_DATA].dist ance_traveled) &RUN_TOT_DATA(rt_data.lifetime _throt_record[2][GOV_DATA].dista nce_traveled) &RUN_TOT_DATA(rt_data.lifetime _throt_record[15][GOV_DATA].dist ance_traveled) &RUN_TOT_DATA(rt_data.lifetime _throt_record[1][GOV_DATA].dista nce_traveled) &RUN_TOT_DATA(rt_data.lifetime _throt_record[16][GOV_DATA].dist ance_traveled) &RUN_TOT_DATA(rt_data.lifetime _throt_record[0][GOV_DATA].dista nce_traveled) &RUN_TOT_DATA(rt_data.lifetime _throt_record[8][GOV_DATA].dista nce_traveled) &RUN_TOT_DATA(rt_data.lifetime _throt_record[7][THROT_DATA].di stance_traveled) &RUN_TOT_DATA(rt_data.lifetime _throt_record[6][THROT_DATA].di stance_traveled) &RUN_TOT_DATA(rt_data.lifetime _throt_record[5][THROT_DATA].di stance_traveled) &RUN_TOT_DATA(rt_data.lifetime _throt_record[4][THROT_DATA].di stance_traveled) &RUN_TOT_DATA(rt_data.lifetime _throt_record[3][THROT_DATA].di stance_traveled)

Running Totals Lifetime distance traveled for power governor notch 5.

Running Totals Lifetime distance traveled for dynamic brake governor notch 6.






Running Totals Lifetime distance traveled for idle.

Running Totals Lifetime distance traveled for power throttle 1.






DTThr6P

Dummy1 Dummy2 Dummy3 Dummy4 DumpRec DV HTR<

&RUN_TOT_DATA(rt_data.lifetime _throt_record[2][THROT_DATA].di stance_traveled) &RUN_TOT_DATA(rt_data.lifetime _throt_record[1][THROT_DATA].di stance_traveled) &RUN_TOT_DATA(rt_data.lifetime _throt_record[0][THROT_DATA].di stance_traveled) &RUN_TOT_DATA(rt_data.lifetime _throt_record[8][THROT_DATA].di stance_traveled) &DISCRETE_OUT(DUMMY) &DISCRETE_IN(DUMMY) &INT_S_IN(DUMMY) &STR_DEVICE(DUMMY) (void *) dump_recorder &SIG_IO_STATE(HTR)

DV HTR>

&SIG_IO_STATE(HTR)

DVMG/DT DVROff> E CTime

&dv_dt &SIG_IO_STATE(DVROFF) &INT_U_IN(E_CTIME)

E_BkEff E_blowr E_cycle E_end E_Engn E_high E_In E_In1 E_Ld E_low E_on

&emergency_brake_brake_effort &mdac_req_blower_cycles &mdac_cycles &mdac_end &mdac_eng_spd_inc_cycles &mdac_high_speed_timer &eui_input_buffer &eui_input_buffer[1] &mdac_loaded_throttle &mdac_low_speed_timer &mdac_on_throttle

DTThr7P

DTThr8P

DTThrId




Running Totals Lifetime distance traveled for idle throttle.

This signal is dummied to test the autocoder. This signal is dummied to test the autocoder. This signal is dummied to test the autocoder This signal is dummied to test the autocoder dump_rec - dump_recorder A better name than HTR-Main Reservoir Drain Value Heater Relay Feedback: A TRUE value indicates the relay is in the closed position. Same as HTR in the Digital State table Drain Valve Heater Relay(formerly HTR): A value of TRUE activates the air system drain valve heater. Same as HTR in the Digital State table. Derivative of main generator volts DVR Off output - this output is used to inhibit the DVR ... EM2000 current_time, as recorded in the fault archive; time since the "epoch" (1-Jan-1970 00:00) in seconds. em_brk_eff - &emergency_brake_brake_effort mdac_blowr - &mdac_req_blower_cycles mdac_cycle - &mdac_cycles mdac_end - &mdac_end mdac_engn - &mdac_eng_spd_inc_cycles mdac_high - &mdac_high_speed_timer eui_input_buf - &eui_input_buffer eui_input - &eui_input_buffer[1] mdac_load - &mdac_loaded_throttle mdac_low - &mdac_low_speed_timer mdac_on - &mdac_on_throttle


E_Start e_time E_Time E1Air E1AirBk

&mdac_start &INT_U_IN(E_TIME) &time_in_throttle &ANA_OUT(EAIR) &SIG_IO_STATE(EAIRBK)

E1AltCO

&SIG_IO_STATE(EALTCO)

E1Altin

&ANA_IN_SLOW(EALT)

E1BatSw

&SIG_IO_STATE(EBATSW)

E1BatV E1Busy

&ANA_OUT(EBATV) &DISCRETE_IN(EBUSY)

E1BusyA

&DISCRETE_OUT(EBUSYA)

E1CabA> E1CabB> E1CSAck E1DirF>

&SIG_IO_STATE(ECABA) &SIG_IO_STATE(ECABB) &SIG_IO_STATE(ECSACK) &SIG_IO_STATE(EDIRF)

E1DirR>

&SIG_IO_STATE(EDIRR)

E1DSDP> E1EAPSI E1EgRPM E1EOilF E1EOPSI E1ETPF E1FulKG E1GdRly E1GfReq

&SIG_IO_STATE(EDSDP) &ANA_OUT(EEA) &ANA_OUT(EEGRPM) &ANA_OUT(EEOIL) &ANA_OUT(EEO) &ANA_OUT(EETP) &ANA_OUT(EFUL) &SIG_IO_STATE(EGDRLY) &SIG_IO_STATE(EGFREQ)

mdac_start - &mdac_start Seconds elapsed since beginning of 'epoch' defined as 00:00:00 1/1/70 mdac_time - &time_in_throttle Ambient air temperature A TRUE value indicates that the automatic (train) air brake system status has changed (either the applied or released signals have changed from their previous state [TRUE to FALSE or FALSE to TRUE]) A TRUE value indicates that the DSD pedal or holdover button is cutout (output ALRTCO = TRUE). This signal is for EVENT #1. It indicates the current altitude as received from the GPS system. Zero altitude is defined as mean sea level. Ref EDPS 400 5.6.9. A TRUE value indicates that the battery switch is closed and that the event recorder is powered (input EVTRCB is TRUE). Battery voltage copy of latest busy check sent by LCC. should be one greater than the last one sent out by event recorder. Event Recorder Busy Check. LCC send this nibble to the Event Recorder, which is supposed to echo it; when the echoed signal (EVENT_BUSY_CHECK) matches, increment the nibble mod 16. A TRUE value indicates that the CAB #1 is active A TRUE value indicates that the CAB #2 is active A TRUE value indicates that the AWS Reset button is pushed (input CSACK = TRUE). A TRUE value indicates that the locomotive is setup in the forward direction (input RHSW F = TRUE) A TRUE value indicates that the locomotive is setup in the reverse direction (input RHSW R = TRUE) A TRUE value indicates that the DSDP relay is picked up (output = TRUE). Engine airbox pressure This signal is for EVENT #1. The engine rpm for event recorder. Engine oil temperature Engine oil pressure This signal is for EVENT #1. The engine water temperature for event recorder Locomotive fuel level A TRUE value indicates that the ground relay is active (GRD RLY = TRUE) This signal is for EVENT #1. A TRUE value indicates that their is a request for generator field (6T) - (input GF REQ = TRUE).


E1HornA E1HornB E1Lat

&SIG_IO_STATE(EHORNA) &SIG_IO_STATE(EHORNB) &ANA_IN_SLOW(ELAT)

E1Long

&ANA_IN_SLOW(ELONG)

E1MG A E1MG V E1MidI1 E1MidO1 E1MidOV E1MidV1 E1MrPr>

&ANA_OUT(EMG_A) &ANA_OUT(EMG_V) &DISCRETE_IN(EMIDI) &DISCRETE_OUT(EMIDO) &DISCRETE_OUT(EMIDOV) &DISCRETE_IN(EMIDV) &SIG_IO_STATE(EMRPR)

E1PkBr>

&SIG_IO_STATE(EPKBR)

E1SnAct

&SIG_IO_STATE(ESNACT)

E1SSCR> E1Throt

&SIG_IO_STATE(ESSCR) &DISCRETE_OUT(ETHROT)

E1Time

&INT_U_IN(ETIME)

E1TMCO>

&SIG_IO_STATE(ETMCO)

E1WhSlp

&SIG_IO_STATE(EWHSLP)

E2DRA A E2DRA I E2FALM1 E2FALM2 E2FDIso E2HEPAc E2MidI2 E2MidO2

&SIG_IO_STATE(EDRA_A) &SIG_IO_STATE(EDRA_I) &SIG_IO_STATE(EFALM) &SIG_IO_STATE(EFALM) &SIG_IO_STATE(EFDISO) &SIG_IO_STATE(EHEPAC) &DISCRETE_IN(EMIDI) &DISCRETE_OUT(EMIDO)

A TRUE value indicates that the horn in CAB #1 is active. A TRUE value indicates that the horn in CAB #2 is active. This signal is for EVENT #1. It indicates the current latitude as received from the GPS system. Zero latitude is defined as the equator. North is positive. Ref EDPS 400 5.6.7. This signal is for EVENT #1. It indicates the current longitude as received from the GPS system. Zero longitude is defined as the Prime Meridian. East is positive. Ref EDPS 400 5.6.8. Main generator current Main generator voltage Event Recorder inbound-to-LCC Message ID Event Recorder Message ID, LCC to event recorder (PACKET #1) version number of event recorder mid out from lcc (packet #1). Version number of Event Recorder MID packet A TRUE value indicates that the main reservoir pressure is low enough that an engine speedup is required to build the pressure up to a normal level. This value id for EVENT #1. A TRUE value indicates that the parking brake is not released (PKB = TRUE) This signal is for EVENT #1. A TRUE value indicates that either sanding magnet valve is active (MVS1 or MVS2 = TRUE) A TRUE value indicates that speed control is active (output SSCR = TRUE) This signal is for EVENT #1. The throttle position is decoded into 4 bits with Idle = 0000, Thr 1 = 0001, ... Thr 8 = 1000, Dynamic Brake = 1001 (9) and Throttle Stop = 1010 (10). This signal is for EVENT #1. It is defined as the number of seconds that have elapsed since the start of the epoch (00:00:00 on Jan 1, 1970 UTC). A TRUE value indicates that at least one traction motor is cutout (percent_traction_available < 1.0) This signal is for EVENT #1. A TRUE value indicates that the wheel slip relay is picked up (output WH SLP = TRUE). Based on digital input DRA which in turn is based on DRA A or DRA B being TRUE. Based on digital input DRA Iso. Based on digital input FALMT1. Based on digital input FALMT2. Based on digital input FDIso. Based on internal word HEPMode. When HEPMode = HEP_ON this output will be TRUE. Event Recorder inbound-to-LCC Message ID Event Recorder Message ID, LCC to event recorder (PACKET #2)


E2MidOV E2MidV2 E2MjVer E2MnVer EAA Mph EAA RPM EBT< EBT>

&DISCRETE_OUT(EMIDOV) &DISCRETE_IN(EMIDV) &ANA_IN_SLOW(EMJVER) &ANA_IN_SLOW(EMNVER) &train_speed &ANA_IN_SLOW(AXL_ALT_EQUI V_RPM) &SIG_IO_STATE(EBT) &SIG_IO_STATE(EBT)

EBusy

&DISCRETE_IN(EBUSY)

EBusyA

&DISCRETE_OUT(EBUSYA)

EC_DB<

&SIG_IO_STATE(EC_DB)

EC_DE<

&SIG_IO_STATE(EC_DE)

EC_FWD<

&SIG_IO_STATE(EC_FWD)

EC_IN<

&SIG_IO_STATE(EC_IN)

EC_NEU<

&SIG_IO_STATE(EC_NEU)

EC_PWR<

&SIG_IO_STATE(EC_PWR)

EC_REV<

&SIG_IO_STATE(EC_REV)

ECBlCB<

&SIG_IO_STATE(ECBLCB)

ECBlwr<

&SIG_IO_STATE(ECBLWR)

ECBlwr>

&SIG_IO_STATE(ECBLWR)

ECFail

&eui_comm_failure

version number of event recorder mid out from lcc (packet #2). Version number of Event Recorder MID packet This value represents the major revision level number of the event recorder software This value represents the minor revision level number of the event recorder software. The effective Axle alternator speed signal. The effective axle alternator RPM signal. Electronic Blowdown Timer - a TRUE value indicates that the EBT relay has picked up. Electronic Blowdown Timer Relay: A TRUE value causes the relay to close and initiate a small release of air from the main air reservoir. End to end communications check. The number received should one higher than the value sent to EMDEC the previous loop. A time delay must be instituted to allow EMDEC to respond. Busy Check: EMDEC will add one to this signal and then send it back on a serial input. EMDEC should increase this number and then repeat the process. Failure of EMDEC to respond properly indicates a failed communications link. Electronic throttle Controller Dynamic Brake input: A momentary TRUE indicates that the operator is requesting dynamic brake operation. Electronic throttle Controller Power/Brake Decrease input: A momentary TRUE indicates that the operator is requesting smaller value of power or brake operation. Electronic throttle Controller Forward input: A momentary TRUE indicates that the operator is requesting forward operation. Electronic throttle Controller Power/Brake Increase input: A momentary TRUE indicates that the operator is requesting larger value of power or brake operation. Electronic throttle Controller Forward input: A momentary TRUE indicates that the operator is requesting neutral operation (neither forward or reverse). Electronic throttle Controller Power input: A momentary TRUE indicates that the operator is requesting power operation. Electronic throttle Controller Reverse input: A momentary TRUE indicates that the operator is requesting reverse operation. Electrical Cabinet Blower Circuit Breaker Feedback - a TRUE value indicates that the circuit breaker for the electrical cabinet blower(s) is CLOSED. Electrical Cabinet Blower contactor feedback - a TRUE value indicates that the ECBlwr contactor is picked up. Electrical Cabinet Blower - This output drives the ECBlwr contactor used to control the blower supplying ventilation to the #1EC & TCC [1st Used - LIRR DE30AC : MEGA Blower supplement]. The status of the EMDEC control data link. SIGNAL DESCRIPTIONS B-25

ECM On< ECMsg ECStat ECTrip> EDevId1 EDevId2 EEngRPM EFS< Eg_Thr EgAirTF EgOilTF EgPrLm EgPrLmR EgRUNST EgSdOwn EgSdTrg EgSpRq Elc EMDECMo EnComPr Eng RPM Eng RPM ENG_PU EngAcl EngCB<

&SIG_IO_STATE(ECM_ON) &STR_DEVICE(ECMSG)

A Signal coming from the EMDEC Computer indicating that their computer is on. These bytes present the displayed message for the health of the locomotive protection system. Ref EDPS 400 5.5.12. &DISCRETE_OUT(ECSTAT) This byte indicates the health of the locomotive electrical control system. Ref EDPS 400 5.5.7. &SIG_IO_STATE(ECTRIP) Engine Control CB Trip: This output fires a trip coil on the Engine Control CB as a last-ditch effort to stop the diesel engine. &STR_DEVICE(EDEVID) Includes Calibration Revision number, calibration file name and part number for each MID (to be displayed on page 2 of Unit Information Screen). &STR_DEVICE(EDEVID) Includes Calibration Revision number, calibration file name and part number for each MID (to be displayed on page 2 of Unit Information Screen). &ANA_IN_SLOW(EENGRPM) The engine speed as measured by the EMDEC system. &SIG_IO_STATE(EFS) Engine Filter Switch: A TRUE value indicates the engine air filters are restricted. &eng_throttle eng_throt - &eng_throttle &ANA_IN_SLOW(EGAIRT) The engine air inlet temperature as measured by EMDEC. This is utilized by GM16V265H engine locomotives equipped with 2WSL. Utilized for locomotive tunnel state. &ANA_IN_SLOW(EGOILT) The engine oil temperature as measured by EMDEC. This is utilized by GM16V265H engine locomotives equipped with 2WSL. Utilized for engine hot-oil throttle knockdowns. &ANA_IN_SLOW(EGPRLM) The Engine Power Limit requested by the EMDEC system. This value is expressed in terms of engine power output or brake watts (BHP in metric). &DISCRETE_IN(EGPRLMR) The reason the EMDEC is requesting an engine power limit. 0 is sent when there is no engine power limit requested. &engine_running_state ENG_RUN_STATE - &engine_running_state &engine_shutdown_owner eng_sd_own - &engine_shutdown_owner &engine_shutdown_trig eng_sd_trg - &engine_shutdown_trig &ANA_OUT(EGSPRQ) The engine speed request that EMDEC should use to control the engine speed. &episode_total_life_consumed elc - &episode_total_life_consumed &DISCRETE_OUT(EMDECMO) EMDEC Operation Mode: To be defined at a later date. &enhanced_com_present enhanced_com_present - &enhanced_com_present &ANA_IN_SLOW(ENG_RPM) Engine RPM (from CA) based on the electrical frequency of the companion alternator. This is the original method of determining ENG_RPM signal. &ANA_IN_SLOW(ENG_RPM) AC Test Stand Special: Engine RPM based on the electrical frequency of the companion alternator. Off by a factor of two since the CA is 60 Hz when the engine is at 900. &ANA_IN_SLOW(ENG_PU_RPM) Engine speed based on a speed pickup. Either EMDEC_ENG_RPM or EPU_RPM. If both exist, operating condition determines source. &ANA_IN_SLOW(ENG_ACCEL) Engine acceleration feedback &SIG_IO_STATE(ENGCB) Engine Control Circuit Breaker: A TRUE value indicates that the Engine Control circuit breaker is in the closed position (new for H-engine 2-way serial link). SIGNAL DESCRIPTIONS B-26

EngCkCc EngCkCP EngCkFP EngCkFT EngCkIn EngCkOP EngCkOT EngCkSS EngCPH< EngCPL< EngETH< EngHrn< EngineR EngineR EngMsg EngOPL< EngOTH< EnGov1D

EnGov1P

EnGov2D

EnGov2P

&SIG_IO_STATE(ENGCKCC) &SIG_IO_STATE(ENGCKCP) &SIG_IO_STATE(ENGCKFP) &SIG_IO_STATE(ENGCKFT) &SIG_IO_STATE(ENGCKIN) &SIG_IO_STATE(ENGCKOP) &SIG_IO_STATE(ENGCKOT) &SIG_IO_STATE(ENGCKSS) &SIG_IO_STATE(ENGCPH) &SIG_IO_STATE(ENGCPL)

A TRUE value indicates that the engine controller detects a crankcase pressure problem. A TRUE value indicates that the engine controller detects a coolant pressure problem. A TRUE value indicates that the engine controller detects a fuel pressure problem. A TRUE value indicates that the engine controller detects a fuel temperature problem. A TRUE value indicates that the engine controller detects an injector problem. A TRUE value indicates that the engine controller detects an oil pressure problem. A TRUE value indicates that the engine controller detects an oil temperature problem. A TRUE value indicates that the engine controller detects a speed sensor (TRS/SRS) problem. A TRUE value indicates that the engine is in a shutdown mode due to high crankcase pressure. A TRUE value indicates that the engine is in a shutdown mode due to low engine coolant pressure. &SIG_IO_STATE(ENGETH) A TRUE value indicates that the engine is in a shutdown mode due to high exhaust temperature, either right, left, or single exhaust depending upon engine type. &SIG_IO_STATE(ENGHRN) Engineer's Horn: a TRUE value indicates that the Horn button at the Engineer's control console has been pressed. &ANA_IN_SLOW(ENGINER) Engine Ratio: The engine ratio as generated by the EMDEC device to indicate % engine load. Used beginning with release 12. &ANA_IN_SLOW(ENGINER) Engine Fuel Ratio: The engine fuel ratio as generated by the EMDEC device. Used through release 11. &STR_DEVICE(ENGMSG) These bytes present the displayed message for the health of the locomotive traction system. Ref EDPS 400 5.5.6. &SIG_IO_STATE(ENGOPL) A TRUE value indicates that the engine is in a shutdown mode due to low engine oil pressure. &SIG_IO_STATE(ENGOTH) A TRUE value indicates that the engine is in a shutdown mode due to high engine oil temperature. &RUN_TOT_DATA(rt_data.lifetime Running Totals Lifetime energy (watt-hrs) for dynamic brake governor notch 1. _throt_record[9][GOV_DATA].tracti on_power) &RUN_TOT_DATA(rt_data.lifetime Running Totals Lifetime energy (watt-hrs) for power governor notch 1. _throt_record[7][GOV_DATA].tracti on_power) &RUN_TOT_DATA(rt_data.lifetime Running Totals Lifetime energy (watt-hrs) for dynamic brake governor notch 2. _throt_record[10][GOV_DATA].trac tion_power) &RUN_TOT_DATA(rt_data.lifetime Running Totals Lifetime energy (watt-hrs) for power governor notch 2. _throt_record[6][GOV_DATA].tracti on_power)


EnGov3D

EnGov3P

EnGov4D

EnGov4P

EnGov5D

EnGov5P

EnGov6D

EnGov6P

EnGov7D

EnGov7P

EnGov8D

EnGov8P

EnGovId

&RUN_TOT_DATA(rt_data.lifetime _throt_record[11][GOV_DATA].trac tion_power) &RUN_TOT_DATA(rt_data.lifetime _throt_record[5][GOV_DATA].tracti on_power) &RUN_TOT_DATA(rt_data.lifetime _throt_record[12][GOV_DATA].trac tion_power) &RUN_TOT_DATA(rt_data.lifetime _throt_record[4][GOV_DATA].tracti on_power) &RUN_TOT_DATA(rt_data.lifetime _throt_record[13][GOV_DATA].trac tion_power) &RUN_TOT_DATA(rt_data.lifetime _throt_record[3][GOV_DATA].tracti on_power) &RUN_TOT_DATA(rt_data.lifetime _throt_record[14][GOV_DATA].trac tion_power) &RUN_TOT_DATA(rt_data.lifetime _throt_record[2][GOV_DATA].tracti on_power) &RUN_TOT_DATA(rt_data.lifetime _throt_record[15][GOV_DATA].trac tion_power) &RUN_TOT_DATA(rt_data.lifetime _throt_record[1][GOV_DATA].tracti on_power) &RUN_TOT_DATA(rt_data.lifetime _throt_record[16][GOV_DATA].trac tion_power) &RUN_TOT_DATA(rt_data.lifetime _throt_record[0][GOV_DATA].tracti on_power) &RUN_TOT_DATA(rt_data.lifetime _throt_record[8][GOV_DATA].tracti on_power)

Running Totals Lifetime energy (watt-hrs) for dynamic brake governor notch 3.

Running Totals Lifetime energy (watt-hrs) for power governor notch 3.











Running Totals Lifetime energy (watt-hrs) for idle.


EngPwr EngRpm EngSdn< EngShHP EngShPw EngStat EngTmpF EngTSH< EngUd1< EngUd2< EngUd3< EnPwCap EnPwCSt EnThr1P

EnThr2P

EnThr3P

EnThr4P

EnThr5P

EnThr6P

&ANA_OUT(ENGPWR) &ANA_IN_SLOW(ENGRPM) &SIG_IO_STATE(ENGSDN) &ANA_IN_SLOW(ENG_SHAFT_P WR) &ANA_IN_SLOW(ENG_SHAFT_P WR) &DISCRETE_OUT(ENGSTAT) &engine_temperature &SIG_IO_STATE(ENGTSH)

The engine power output as measured in brake watts (metric BHP). Engine Speed From EMDEC. A TRUE value indicates that the engine is in a shutdown mode. Engine shaft power feedback, displayed in units of HP. Engine shaft power feedback

This byte indicates the health of the locomotive engine system. Ref EDPS 400 5.5.13. Calculated engine temperature. A TRUE value indicates that the engine is in a shutdown state because of a turbocharger overspeed - either right, left, or single turbocharger &SIG_IO_STATE(ENGUD) A TRUE value indicates that the engine is in a shutdown mode due undefined condition #1. This signal will be used for future expansion. &SIG_IO_STATE(ENGUD) A TRUE value indicates that the engine is in a shutdown mode due undefined condition #2. This signal will be used for future expansion. &SIG_IO_STATE(ENGUD) A TRUE value indicates that the engine is in a shutdown mode due undefined condition #3. This signal will be used for future expansion. &engine_power_capability The engine power capability, or what the engine is capable of making. &engine_power_capability_status The engine power capability status. &RUN_TOT_DATA(rt_data.lifetime Running Totals Lifetime energy (watt-hrs) for power throttle 1. _throt_record[7][THROT_DATA].tr action_power) &RUN_TOT_DATA(rt_data.lifetime Running Totals Lifetime energy (watt-hrs) for power throttle 2. _throt_record[6][THROT_DATA].tr action_power) &RUN_TOT_DATA(rt_data.lifetime Running Totals Lifetime energy (watt-hrs) for power throttle 3. _throt_record[5][THROT_DATA].tr action_power) &RUN_TOT_DATA(rt_data.lifetime Running Totals Lifetime energy (watt-hrs) for power throttle 4. _throt_record[4][THROT_DATA].tr action_power) &RUN_TOT_DATA(rt_data.lifetime Running Totals Lifetime energy (watt-hrs) for power throttle 5. _throt_record[3][THROT_DATA].tr action_power) &RUN_TOT_DATA(rt_data.lifetime Running Totals Lifetime energy (watt-hrs) for power throttle 6. _throt_record[2][THROT_DATA].tr action_power)


EnThr7P

EnThr8P

EnThrId

EOTEMG< EOVPrRf EPC< EPC> EpernLo EPU RPM EPwrAnt ER Sw< ER_Pres ERL< ERL> ERL_TL<

ERP_Vld ERSpr1< ERSpr2< ESCO>

&RUN_TOT_DATA(rt_data.lifetime _throt_record[1][THROT_DATA].tr action_power) &RUN_TOT_DATA(rt_data.lifetime _throt_record[0][THROT_DATA].tr action_power) &RUN_TOT_DATA(rt_data.lifetime _throt_record[8][THROT_DATA].tr action_power) &SIG_IO_STATE(EOTEMG)

Running Totals Lifetime energy (watt-hrs) for power throttle 7.



End Of Train EMerGency input: FIRE - the guarded switch that tells FIRE to tell the EOT radio to initiate an EOT emergency application. &engine_overload_power_referenc EOV_POWER_RF - &engine_overload_power_reference e &SIG_IO_STATE(EPC) Engine Purge Contactor Feedback: A TRUE value indicates that the engine purge contactor is in the closed position. &SIG_IO_STATE(EPC) Engine Purge Contactor: A TRUE value causes the contactor to close. &low_e_per_n_medium epern_low - &low_e_per_n_medium &ANA_IN_SLOW(EPU_RPM) Engine RPM based on a magnetic pickup &ANA_OUT(EPWRANT) Power anticipation indicator. This signal indicates the raw at which power will be applied or removed. 1 indicated a very fast increase and -1 indicates a very fast decrease. &SIG_IO_STATE(ER_SW) Engine Run Switch: A TRUE value indicates the switch on the operator control console is in the on position. &DISCRETE_IN(ER_PRES) Equalizing Reservoir Pressure signal coming from microprocessor air brake system via serial link. &SIG_IO_STATE(ERL) Engine Ready to Load Relay Feedback - a TRUE value indicates that the ERL relay has been energized. &SIG_IO_STATE(ERL) Engine Ready to Load - [1st Used - LIRR DE30AC] &SIG_IO_STATE(ERL_TL) Engine Ready to Load Trainline Input - A TRUE value indicates that at least one (non-lead unit) loco within the consist has a running diesel engine that is in a ready to load state. This was introduced with the t/l engine start feature on the DE30AC's. &SIG_IO_STATE(ERP_VLD) Equalizing Reservoir Pressure Validation signal coming from microprocessor air brake system via serial link. Indicates whether the BP_Pres signal is valid. &SIG_IO_STATE(ERSPR1) Event Recorder Spare #1 input (EM2000 to ICE for event recorder purposes only). First used on Queensland GT42CU-AC order (969160). &SIG_IO_STATE(ERSPR2) Event Recorder Spare #2 input (EM2000 to ICE for event recorder purposes only). First used on Queensland GT42CU-AC order (969160). &SIG_IO_STATE(ESCO) Emergency Sand Cut Out: Relay : A TRUE value causes the relay to energize and open the circuit to cut out emergency sanding. SIGNAL DESCRIPTIONS B-30

ESR< ESWarn< ESWarn> ETGov1D

ETGov1P

ETGov2D

ETGov2P

ETGov3D

ETGov3P

ETGov4D

ETGov4P

ETGov5D

ETGov5P

ETGov6D

&SIG_IO_STATE(ESR) &SIG_IO_STATE(ESWARN)

Emergency Sand Relay: A TRUE value indicates that the relay is in the closed position. Engine Start Warning Relay Feedback: A TRUE value indicates that the ESWarn relay is in the energized state. &SIG_IO_STATE(ESWARN) Engine Start Warning: This output is used to drive a Klaxon alarm device which would indicate that the engine start sequence is about to be initiated. Basically, it's a "Stand Clear" warning. &RUN_TOT_DATA(rt_data.lifetime Running Totals Lifetime Engine Data for dynamic brake governor notch 1. _throt_record[9][GOV_DATA].engi ne_time) &RUN_TOT_DATA(rt_data.lifetime Running Totals Lifetime Engine Data for power governor notch 1. _throt_record[7][GOV_DATA].engi ne_time) &RUN_TOT_DATA(rt_data.lifetime Running Totals Lifetime Engine Data for dynamic brake governor notch 2. _throt_record[10][GOV_DATA].eng ine_time) &RUN_TOT_DATA(rt_data.lifetime Running Totals Lifetime Engine Data for power governor notch 2. _throt_record[6][GOV_DATA].engi ne_time) &RUN_TOT_DATA(rt_data.lifetime Running Totals Lifetime Engine Data for dynamic brake governor notch 3. _throt_record[11][GOV_DATA].eng ine_time) &RUN_TOT_DATA(rt_data.lifetime Running Totals Lifetime Engine Data for power governor notch 3. _throt_record[5][GOV_DATA].engi ne_time) &RUN_TOT_DATA(rt_data.lifetime Running Totals Lifetime Engine Data for dynamic brake governor notch 4. _throt_record[12][GOV_DATA].eng ine_time) &RUN_TOT_DATA(rt_data.lifetime Running Totals Lifetime Engine Data for power governor notch 4. _throt_record[4][GOV_DATA].engi ne_time) &RUN_TOT_DATA(rt_data.lifetime Running Totals Lifetime Engine Data for dynamic brake governor notch 5. _throt_record[13][GOV_DATA].eng ine_time) &RUN_TOT_DATA(rt_data.lifetime Running Totals Lifetime Engine Data for power governor notch 5. _throt_record[3][GOV_DATA].engi ne_time) &RUN_TOT_DATA(rt_data.lifetime Running Totals Lifetime Engine Data for dynamic brake governor notch 6. _throt_record[14][GOV_DATA].eng ine_time)


ETGov6P

ETGov7D

ETGov7P

ETGov8D

ETGov8P

ETGovId

ETP_OCO

ETP1F ETP2F ETPF ETThr1P

ETThr2P

ETThr3P

&RUN_TOT_DATA(rt_data.lifetime _throt_record[2][GOV_DATA].engi ne_time) &RUN_TOT_DATA(rt_data.lifetime _throt_record[15][GOV_DATA].eng ine_time) &RUN_TOT_DATA(rt_data.lifetime _throt_record[1][GOV_DATA].engi ne_time) &RUN_TOT_DATA(rt_data.lifetime _throt_record[16][GOV_DATA].eng ine_time) &RUN_TOT_DATA(rt_data.lifetime _throt_record[0][GOV_DATA].engi ne_time) &RUN_TOT_DATA(rt_data.lifetime _throt_record[8][GOV_DATA].engi ne_time) &ANA_IN_SLOW(ETP_OCO)

Running Totals Lifetime Engine Data for power governor notch 6.

Running Totals Lifetime Engine Data for dynamic brake governor notch 7.


Running Totals Lifetime Engine Data for dynamic brake governor notch 8.


Running Totals Lifetime Engine Data for idle.

Engine water temperature feedback signal after the oil cooler. Used with the Phase 2 (One Radiator Bank Per Loop) cooling system, and the AWT and ETP water temperature feedbacks as a threesome. &ANA_IN_SLOW(ETP1) Engine Temperature Probe 1: The engine cooling water temperature as measured by temperature probe 1. This probe is used in conjunction with the ETP2 signal. &ANA_IN_SLOW(ETP2) Engine Temperature Probe 2: The engine cooling water temperature as measured by temperature probe 2. This signal is used in conjunction with the ETP1 signal. &ANA_IN_SLOW(ETP[0]) Engine water temperature feedback signal used with Separate Aftercooling systems, including the phase two One Radiator Bank Per Loop system. &RUN_TOT_DATA(rt_data.lifetime Running Totals Lifetime Engine Data for power throttle 1. _throt_record[7][THROT_DATA].e ngine_time) &RUN_TOT_DATA(rt_data.lifetime Running Totals Lifetime Engine Data for power throttle 2. _throt_record[6][THROT_DATA].e ngine_time) &RUN_TOT_DATA(rt_data.lifetime Running Totals Lifetime Engine Data for power throttle 3. _throt_record[5][THROT_DATA].e ngine_time)


ETThr4P

ETTuILF ETTuIRF Evnt01< Evnt01> Evnt02< Evnt02> Evnt03< Evnt03> Evnt04> EvtRCB<

&RUN_TOT_DATA(rt_data.lifetime _throt_record[4][THROT_DATA].e ngine_time) &RUN_TOT_DATA(rt_data.lifetime _throt_record[3][THROT_DATA].e ngine_time) &RUN_TOT_DATA(rt_data.lifetime _throt_record[2][THROT_DATA].e ngine_time) &RUN_TOT_DATA(rt_data.lifetime _throt_record[1][THROT_DATA].e ngine_time) &RUN_TOT_DATA(rt_data.lifetime _throt_record[0][THROT_DATA].e ngine_time) &RUN_TOT_DATA(rt_data.lifetime _throt_record[8][THROT_DATA].e ngine_time) &ANA_IN_SLOW(ETTUIL) &ANA_IN_SLOW(ETTUIR) &SIG_IO_STATE(EVNT01) &SIG_IO_STATE(EVNT01) &SIG_IO_STATE(EVNT02) &SIG_IO_STATE(EVNT02) &SIG_IO_STATE(EVNT03) &SIG_IO_STATE(EVNT03) &SIG_IO_STATE(EVNT04) &SIG_IO_STATE(EVTRCB)

ExLdMtr

&ANA_OUT(EXLDMTR)

Ext HE<

&SIG_IO_STATE(EXT_HE)

ExThReq ExtLT<

&exc_throttle_request &SIG_IO_STATE(EXTLT)

F_AnaIn

&fast_analog_input_map

ETThr5P

ETThr6P

ETThr7P

ETThr8P

ETThrId

Running Totals Lifetime Engine Data for power throttle 8.





Running Totals Lifetime Engine Data for throttle idle.

Exhaust temperature at the Turbine Inlet of the engine's left bank. Exhaust temperature at the Turbine Inlet of the engine's right bank. Event Relay Feedback: A TRUE value indicates that the relay is in the closed position. Event output #1. A TRUE value indicates that a selected event has occurred. Event Relay Feedback: A TRUE value indicates that the relay is in the closed position. Event output #2. A TRUE value indicates that a selected event has occurred. Event Relay Feedback: A TRUE value indicates that the relay is in the closed position. Event output #3: A TRUE value indicates that a selected event has occurred. Event output #4: A TRUE value indicates that a selected event has occurred. Event Recorder Circuit Breaker feedback: A TRUE value indicates that the Event Recorder circuit breaker is Closed. First used on EW&S JT42CWR. External Load Meter: This output is used to drive an external load meter via a CAM module and trainline. The output is in terms of the voltage supplied to the CAM module. Indicates that Head End power is provided from an external source. The external source could be a trainlined locomotive or shore power. exc_th_req - &exc_throttle_request Digital input used to select self vs. external load test. ExtLT FALSE indicates internal (self); ExtLT TRUE indicates external. f_ana_in_m - &fast_analog_input_map SIGNAL DESCRIPTIONS B-33

FAlm<

&SIG_IO_STATE(FALM)

FAlm>

&SIG_IO_STATE(FALM)

FAlmL<

&SIG_IO_STATE(FALML)

FAlmT1<

&SIG_IO_STATE(FALMT1)

FAlmT2<

&SIG_IO_STATE(FALMT2)

FAlmTL<

&SIG_IO_STATE(FALMTL)

Fan 1 Fan 2 Fan 3 Fans_On FC1<

&display_fan_list[0] &display_fan_list[1] &display_fan_list[2] &fans_on &SIG_IO_STATE(FC1)

FC1> FC1A<

&SIG_IO_STATE(FC1) &SIG_IO_STATE(FC1A)

FC2<

&SIG_IO_STATE(FC2)

FC2> FC2A<

&SIG_IO_STATE(FC2) &SIG_IO_STATE(FC2A)

FC3<

&SIG_IO_STATE(FC3)

FC3> FCB En<

&SIG_IO_STATE(FC3) &SIG_IO_STATE(FCB_EN)

FCB En>

&SIG_IO_STATE(FCB_EN)

FALM relay feedback: A TRUE value indicates that relay FALM has been picked up. First used on EW&S JT42CWR. Fire Alarm Relay: a TRUE value indicates a request to pick up the FALM relay. First used on EW&S JT42CWR. Fire Alarm Local Input - a TRUE value indicates that the local fire suppression system has detected excessively high temperature at least one monitored location on the locomotive. (Initially set up using temperature sensors as the source for this input.) Fire Alarm Temperature Level 1 Input - a TRUE value indicates that the fire detection/ suppression system has detected excessively high temperature at the first stage of detection at least one monitored location on the locomotive. Fire Alarm Temperature Level 2 Input - a TRUE value indicates that the fire detection/ suppression system has detected excessively high temperature at the second stage of detection at least one monitored location on the locomotive. Fire Alarm TrainLine Input - a TRUE value indicates that the trainline associated with a fire alarm condition is being fed with a 74Vdc signal. This indicates that somewhere in the consist a fire suppression system has detected excessively high temperatu Fan status for fan 1 (ON, HALF, FULL) Fan status for fan 2 (ON, HALF, FULL) Fan status for fan 3 (ON, HALF, FULL) fans_on - &fans_on Fan Contactor 1 Feedback: A TRUE value indicates that the FC1 contactor is in the closed position. Fan Contactor #1: A TRUE value causes the FC1 contactor to close. Fan Contactor 1A Relay Feedback: A TRUE value indicates that the relay is in the closed position. Fan Contactor 2 Feedback: A TRUE value indicates that the FC2 contactor is in the closed position. Fan Contactor #2: A TRUE value causes the FC2 contactor to close. Fan Contactor 2A Relay Feedback: A TRUE value indicates that the relay is in the closed position. Fan Contactor 3 Feedback: A TRUE value indicates that the FC3 contactor is in the closed position. Fan Contactor #3: A TRUE value causes the FC3 contactor to close. Fast (DC) Circuit Breaker Enable. A TRUE value indicates that the feedback from the FCB En relay has been received. Fast Circuit Breaker Enabled Relay, used on DM Locomotives.


FCF1< FCF1> FCF1A> FCF1AB< FCF2< FCF2> FCF2A> FCF2AB< FCF3< FCF3> FCF3A> FCF3AB< FCS1< FCS1> FCS2< FCS2> FCS3< FCS3> FdCkRes FDIso< Fe_temp FFltPrs FGFulKG

&SIG_IO_STATE(FCF1)

Fast Speed Fan Contactor 1 Feedback: Phase 2: A TRUE value indicates that the FCF1 contactor is in the closed position. &SIG_IO_STATE(FCF1) Phase2 Fast Speed Fan Contactor #1: A TRUE value causes the FCF1 contactor to close. &SIG_IO_STATE(FCF1AB) Fast Speed Fan Contactor #1: A TRUE value causes the FCF1A and FCF1B contactors to close. &SIG_IO_STATE(FCF1AB) Fast Speed Fan Contactor 1 Feedback: A TRUE value indicates that both the FCF1A and FCF1B contactors are in the closed position. &SIG_IO_STATE(FCF2) Fast Speed Fan Contactor 3 Feedback: Phase 2: A TRUE value indicates that the FCF2 contactor is in the closed position. &SIG_IO_STATE(FCF2) Phase2 Fast Speed Fan Contactor #2: A TRUE value causes the FCF2 contactor to close. &SIG_IO_STATE(FCF2AB) Fast Speed Fan Contactor #2: A TRUE value causes the FCF2A and FCF2B contactors to close. &SIG_IO_STATE(FCF2AB) Fast Speed Fan Contactor 2 Feedback: A TRUE value indicates that both the FCF2A and FCF2B contactors are in the closed position. &SIG_IO_STATE(FCF3) Fast Speed Fan Contactor 3 Feedback: Phase 2: A TRUE value indicates that the FCF3 contactor is in the closed position. &SIG_IO_STATE(FCF3) Phase2 Fast Speed Fan Contactor #3: A TRUE value causes the FCF3 contactor to close. &SIG_IO_STATE(FCF3AB) Fast Speed Fan Contactor #3: A TRUE value causes the FCF3A and FCF3B contactors to close. &SIG_IO_STATE(FCF3AB) Fast Speed Fan Contactor 3 Feedback: A TRUE value indicates that both the FCF3A and FCF3B contactors are in the closed position. &SIG_IO_STATE(FCS1) Slow Speed Fan Contactor 1 Feedback: A TRUE value indicates that the FCS1 contactor is in the closed position. &SIG_IO_STATE(FCS1) Slow Speed Fan Contactor #1: A TRUE value causes the FCS1 contactor to close. &SIG_IO_STATE(FCS2) Slow Speed Fan Contactor 2 Feedback: A TRUE value indicates that the FCS2 contactor is in the closed position. &SIG_IO_STATE(FCS2) Slow Speed Fan Contactor 2: A TRUE value causes the FCS2 contactor to close. &SIG_IO_STATE(FCS3) Slow Speed Fan Contactor 3 Feedback: A TRUE value indicates that the FCS3 contactor is in the closed position. &SIG_IO_STATE(FCS3) Slow Speed Fan Contactor #3: A TRUE value causes the FCS3 contactor to close. &field_circuit_resistance fld_ckt_res - &field_circuit_resistance &SIG_IO_STATE(FDISO) Fires Detection Isolate Request: A TRUE value indicates that the fire detection isolation switch has been closed, picking up relay FDISO. First used on EW&S JT42CWR. &PROT_DATA(iron_temperature[0 iron_temp - &PROT_DATA(iron_temperature[0]) ]) &ANA_IN_SLOW(FFLTPRS) Fuel Pressure Into the fuel filter ... &ANA_IN_SLOW(FGFUL) locomotive_fuel_level signal from electronic fuel gauge SIGNAL DESCRIPTIONS B-35

FGFulV< FIBLOF> Fil_E_N FINECB<

&SIG_IO_STATE(FGFULV) &SIG_IO_STATE(FIBLOF) &filtered_e_per_n &SIG_IO_STATE(FINECB)

FkLocSp FkMrPrs FLBlCB<

&fake_flt_loco_spd &fake_mr_press &SIG_IO_STATE(FLBLCB)

FlBwCB< FLDS1A<

&SIG_IO_STATE(FLBWCB) &SIG_IO_STATE(FLDS1A)

FLDS1A>

&SIG_IO_STATE(FLDS1A)

FLDS1B<

&SIG_IO_STATE(FLDS1B)

FLDS1B>


FLDS2A<


FLDS2A>


FLDS2B<


FLDS2B>


Flt_Ohm Flt_Vdv FP CB< FP CB< FP Rly<

&fault_reset &filtered_v_plus_delta_v &SIG_IO_STATE(FP_CB) &SIG_IO_STATE(FP_CB) &SIG_IO_STATE(FP_RLY)

FP Rly>

&SIG_IO_STATE(FP_RLY)

FPDEgFl FPDPrFl FPDPrFl

&ANA_IN_SLOW(FPDEGFL) &ANA_IN_SLOW(FPDPRFL) &ANA_IN_SLOW(FPDPRFL)

Value of fuel validity bit (1 = valid, 0 = invalid). First used on EW&S JT42CWR 968702. Fire Blower Off: A TRUE value causes the Fire Equipment blower to turn off, otherwise its on. fil_e_per_n - &filtered_e_per_n FINE air cabinet blower Circuit Breaker Feedback - Phase 2 - a TRUE value indicates that the circuit breaker for the Fine Filtered Air Blower is CLOSED. This is the simulated filtered locomotive speed that can be set by the user for testing purposes. fake_mr_pres - &fake_mr_press Filter Blower Circuit Breaker Feedback - a TRUE value indicates that the circuit breaker for the electrical cabinet blower(s) is CLOSED. Filter Blower Circuit Breaker : A TRUE value indicates the circuit breaker is in the on position. Field shunting contactor for first set of resistors on truck No. 1. A value of TRUE indicates that the contactor is picked up. First used on Romanian 959050 LXO order. Field shunting contactor for the first set of resistors on truck No. 1. A value of TRUE picks up the contactor. First used on the Romanian 959050 LXO order. Field shunting contactor for second set of resistors on truck No. 1. A value of TRUE indicates that the contactor is picked up. First used on Romanian 959050 LXO order. Field shunting contactor for the second set of resistors on truck No. 1. A value of TRUE picks up the contactor. First used on the Romanian 959050 LXO order. Field shunting contactor for first set of resistors on truck No. 2. A value of TRUE indicates that the contactor is picked up. First used on Romanian 959050 LXO order. Field shunting contactor for the first set of resistors on truck No. 2. A value of TRUE picks up the contactor. First used on the Romanian 959050 LXO order. Field shunting contactor for second set of resistors on truck No. 2. A value of TRUE indicates that the contactor is picked up. First used on Romanian 959050 LXO order. Field shunting contactor for the second set of resistors on truck No. 2. A value of TRUE picks up the contactor. First used on the Romanian 959050 LXO order. fault_reset - &fault_reset flt_v_dv - &filtered_v_plus_delta_v Fuel Pump Circuit Breaker: A TRUE value indicates the circuit breaker is in the ON position. Fuel Pump Circuit Breaker: A TRUE value indicates the circuit breaker is in the on position. Fuel Pump Relay Feedback: A TRUE value indicates that the fuel pump relay is in the closed position. Fuel Pump Relay: A value of TRUE activates the fuel pump relay which in turn activates the fuel pump. Fuel pressure drop across the engine fuel filter. Fuel pressure drop across the primary fuel filter. Fuel pressure drop across the primary fuel filter. SIGNAL DESCRIPTIONS B-36

FPEgFlI FPEgIPS FPEgIPS FPPrFlI FPPrFlI Fpr_Stu FREE_W FSDis<

FSDis> FSDMnl<

FSDReq<

FSDRst< FSDRst> FSS CB< FTEgIF FTEgIF FVS< FvsFlFg FvsFlSt GapStat GB1< GB1> GB1PAnt GB1PAva GB2< GB2> GB2PAnt GB2PAva

&ANA_IN_SLOW(FPEGFLI) &ANA_IN_SLOW(FPEGI) &ANA_IN_SLOW(FPEGI) &ANA_IN_SLOW(FPPRFLI) &ANA_IN_SLOW(FPPRFLI) &fpr_status &free_wheeling &SIG_IO_STATE(FSDIS)

Fuel pressure into the engine fuel filter. Fuel pressure into the engine. Fuel pressure into the engine. Fuel pressure into the primary fuel filter. Fuel pressure into the primary fuel filter. fpr_status - &fpr_status FREE_WHEEL - &free_wheeling Fire Suppression Discharge Feedback - a TRUE value indicates that the FSDis relay is picked up. This typically indicates that the control head for dispersing the fire suppression agent has been activated. &SIG_IO_STATE(FSDIS) Fire Suppression Discharge &SIG_IO_STATE(FSDMNL) Fire Suppression Discharge Manual Feedback - This feedback is supplied to indicate that the local fire suppression system was activated at a time when the LCC was powered down (CCB = FALSE). This feedback is provided as a means to inhibit engine start (i &SIG_IO_STATE(FSDREQ) Fire Suppression Discharge Request Input - a TRUE value indicates that the Fire Suppression Discharge control interface (pushbutton, etc.) has been activated somewhere within the consist. Original implementation (DE30AC) had this signal trainlined. The &SIG_IO_STATE(FSDRST) Fire Suppression Discharge Reset Feedback - a TRUE value indicates that the FSDRst relay is picked up. &SIG_IO_STATE(FSDRST) Fire Suppression Discharge Reset &SIG_IO_STATE(FSS_CB) Fire Suppression System Circuit Breaker Feedback - a TRUE value indicates that the Fire Suppression System Circuit Breaker is CLOSED. &ANA_IN_SLOW(FTEGI) Fuel temperature. &ANA_IN_SLOW(FTEGI) Fuel temperature. &SIG_IO_STATE(FVS) Filter Vacuum Switch: A TRUE value indicates the inertial filters are restricted. &fvs_info.fault_code fvs_fail_flg - &fvs_info.fault_code &fvs_info.state_flag fvs_fail_st - &fvs_info.state_flag &gap_state gap_state - Used to determine the present gap state such as No Gap, Gap, or Big Gap. &SIG_IO_STATE(GB1) Grid Blower Contactor 1: A value of TRUE indicates that the GB1 contactor has been closed. &SIG_IO_STATE(GB1) Grid Blower Contactor #1: &anticipated_blower1_grid_power ant_grd_pwr1 - &anticipated_blower1_grid_power &available_grid_power[0] grd_pwr_av1 - &available_grid_power[0] &SIG_IO_STATE(GB2) Grid Blower Contactor 2: A value of TRUE indicates that the GB2 contactor has been closed. &SIG_IO_STATE(GB2) Grid Blower Contactor #2: &anticipated_blower2_grid_power ant_grd_pwr2 - &anticipated_blower2_grid_power &available_grid_power[1] grd_pwr_av2 - &available_grid_power[1] SIGNAL DESCRIPTIONS B-37

GB3< GB3> GB4< GB4> GBC< GBC> GBlw A GBlw A GBlw1 A GBlw2 A GCFldRf GCL Cl<

&SIG_IO_STATE(GB3) &SIG_IO_STATE(GB3) &SIG_IO_STATE(GB4) &SIG_IO_STATE(GB4) &SIG_IO_STATE(GBC) &SIG_IO_STATE(GBC) &ANA_IN_SLOW(GBLW_A[0]) &ANA_IN_SLOW(GBLW_A[0]) &ANA_IN_SLOW(GBLW1_A) &ANA_IN_SLOW(GBLW2_A) &brake_tm_fld_current_desired &SIG_IO_STATE(GCL_CL)

GCL Cl> GCL CO< GCL CO> GCL Op<

&SIG_IO_STATE(GCL_CL) &SIG_IO_STATE(GCL_CO) &SIG_IO_STATE(GCL_CO) &SIG_IO_STATE(GCL_OP)

GCL Op> Gen_Dec GF Req<

&SIG_IO_STATE(GCL_OP) &generator_decaying &SIG_IO_STATE(GF_REQ)

GFA<

&SIG_IO_STATE(GFA)

GFA> GFC<

&SIG_IO_STATE(GFA) &SIG_IO_STATE(GFC)

GFC>

&SIG_IO_STATE(GFC)

Gfc_Stu GFD<

&gfc_status &SIG_IO_STATE(GFD)

GFD>

&SIG_IO_STATE(GFD)

Grid Blower Contactor 3: A value of TRUE indicates that the GB3 contactor has been closed. Grid Blower Contactor #3: Grid Blower Contactor 4: A value of TRUE indicates that the GB4 contactor has been closed. Grid Blower Contactor #4: Governor Boost Relay: A TRUE value indicates that the relay is in the closed position. Governor Boost Relay: A value of TRUE causes the relay to close. DC System: Dynamic Brake Grid Blower Motor Current Platform AC: Dynamic Brake Grid Blower Motor Current. Note LACK of signal inversion. DC System: Dynamic Brake Grid Blower #1 Motor Current DC System: Dynamic Brake Grid Blower #2 Motor Current The traction motor field current that is being requested by the grid current controller. Ground Connection Link Closed Feedback: A TRUE value indicates that the GCL switch-gear is in the closed position. Ground Connection Link Closed, used on DM Locomotives. Ground Connection Link Cut-Out Ground Connection Link Cutout, used on DM Locomotives. Ground Connection Link Open Feedback: A TRUE value indicates that the GCL switch-gear is in the open position. Ground Connection Link Open, used on DM Locomotives. gen_dec - &generator_decaying Generator Field Request Switch: A TRUE value indicates the operator has requested power operation by selecting a throttle position and the Generator Field switch in on. Generator Field "A" contactor: A TRUE value indicates that the contactor is in the closed position. The closed position causes the GFA resistor to be shorted and therefore have no effect. Generator Field Auxiliary Contactor [shorts the GFA resistor] Generator Field Contactor Feedback: A TRUE value indicates the contactor is in the closed position. Generator Field Contactor: A value of TRUE energizes the generator field contactor and completes the generator field circuit. gfc_status - &gfc_status Generator Field Decay Contactor Feedback: A TRUE value indicates the contactor is in the closed position. Generator Field Decay Contactor: A TRUE value causes the GFD contactor to close. When GFD is open, a resistor is placed in the generator field circuit in order to decay the generator field more rapidly.


Gfd_del Gfd_St GFldSw< GnBw_A GnBwCB< GnTrCB< Gov Req GPSdir GPSvel GR Rst> Grd_Pr1 Grd_Pr2 Grd1Pwr Grd2Pwr GrdARf GrdCLm1 GrdCLm2 GrdRly< Grds KW GrdSt1 GrdSt2 GrdStp1 GrdStp2 GrdSts1 GrdSts2 Grid V

&drop_load_gfd_delay &gfd_status &SIG_IO_STATE(GFLDSW)

gfd_del - &drop_load_gfd_delay gfd_st - &gfd_status Generator Field Switch Feedback: A TRUE value indicates that the Generator Field Switch (typically located on the control stand/lower console) is in the UP (on) position. &ANA_IN_SLOW(GNBW_A) Generator Motor Blower CT current ... this input provides a current that is proportional to the total current in phase 2 of the Generator blower motor. This value is used for fault detection.. &SIG_IO_STATE(GNBWCB) Generator Blower Circuit Breaker: A value of TRUE indicates that the circuit breaker is in the ON position. &SIG_IO_STATE(GNTRCB) Generator Transition Control Circuit Breaker: A TRUE value indicates that the generator transition control circuit breaker is in the on position. &governor_request Governor requested throttle position, Idle and 1 through 8 &ANA_IN_SLOW(GPS_HEADING The GPS heading for the locomotive in radians. ) &ANA_IN_SLOW(GPS_LOCO_VE GPS Absolute velocity in m/sec LOCITY) &SIG_IO_STATE(GR_RST) Ground Relay Reset Coil: A TRUE value energizes the reset coil of the ground relay causing the ground relay to reset. &grid_pwr[0] grid_pwr1 - &grid_pwr[0] &grid_pwr[1] grid_pwr2 - &grid_pwr[1] &ANA_IN_SLOW(GRID_POWER[ This calculated signal represents the calculated grid power feedback on different types of AC 0]) locomotives. &ANA_IN_SLOW(GRID_POWER[ This calculated signal represents the calculated grid power feedback on different types of AC 1]) locomotives. &min_grid_current_ref The final grid current reference that enters the grid current controller. &grid_cooling_tcc_power_limit[0] grd_cool_lim1 - &grid_cooling_tcc_power_limit[0] &grid_cooling_tcc_power_limit[1] grd_cool_lim2 - &grid_cooling_tcc_power_limit[1] &SIG_IO_STATE(GRDRLY) Ground Relay: A value of TRUE indicates the ground relay protection system has tripped. &grid_power Total grid power dissipation, 0 - 9999 kwats &grid_ready_state[0] grid_rdy_st1 - &grid_ready_state[0] &grid_ready_state[1] grid_rdy_st2 - &grid_ready_state[1] &grid_step[0] This is the actual grid step the GS contactors are in for grid path 1. &grid_step[1] This is the actual grid step the GS contactors are in for grid path 2. &grid_ready_status[0] grid_rdy_sts1 - &grid_ready_status[0] &grid_ready_status[1] grid_rdy_sts2 - &grid_ready_status[1] &ANA_IN_SLOW(GRID_V) Dynamic Brake Grid Voltage. Only measured across some of the grid sections.


Grid1 A

&ANA_IN_SLOW(GRID1_A)

Grid1 A Grid2 A

&ANA_IN_SLOW(GRID1_A) &ANA_IN_SLOW(GRID2_A)

Grid2 A Grid3 A Grid4 A GridAvl GRLO< GRLO>

&ANA_IN_SLOW(GRID2_A) &ANA_IN_SLOW(GRID3_A) &ANA_IN_SLOW(GRID4_A) &grids_avail &SIG_IO_STATE(GRLO) &SIG_IO_STATE(GRLO)

GRLOR1< GRLOR2< GRLORS<

&SIG_IO_STATE(GRLOR1) &SIG_IO_STATE(GRLOR2) &SIG_IO_STATE(GRLORS)

GRLOTL<

&SIG_IO_STATE(GRLOTL)

GRNtCO< GS1<

&SIG_IO_STATE(GRNTCO) &SIG_IO_STATE(GS1)

GS1> GS2<

&SIG_IO_STATE(GS1) &SIG_IO_STATE(GS2)

GS2> GStpRdy GStpRf1 GStpRf2 GTMFdRf GTO1<

&SIG_IO_STATE(GS2) &grid_step_ready &final_grid_step_desired[0] &final_grid_step_desired[1] &tm_field_current_desired &SIG_IO_STATE(GTO1)

GTO1>

&SIG_IO_STATE(GTO1)

GTO2<

&SIG_IO_STATE(GTO2)

AC System, 5000:1 LEM : Release 11 and Above. Dynamic Brake Grid #1 Current. Should be used on all AC units with a 5000:1 current LEM independent of which ADA is used. The software will make the required adjustments if a ADA 304 is used. DC System : Dynamic Brake Grid #1 Current AC Platform, 5000:1 LEM : Release 11 and Above. Dynamic Brake Grid #1 Current. Should be used on all platform units independent of which ADA is used. The software will make the required adjustments if a ADA 304 is used. DC System : Dynamic Brake Grid #2 Current DC System : Dynamic Brake Grid #3 Current DC System : Dynamic Brake Grid #4 Current Number of DB grid branches available, 0, 1, 2 Ground Relay Lockout Feedback - a TRUE value indicates that the GRLO relay is picked up. Ground Relay LockOut - This output is used to provide a T/L signal indicating that a unit in consist is experiencing a GRLO condition. [1st used - LIRR DE30AC] Ground Relay Lockout Reset Switch - Cab 1 [reset external to display/TRUE requests RESET] Ground Relay Lockout Reset Switch - Cab 2 [reset external to display/TRUE requests RESET] Ground Relay Lockout Reset: A TRUE value indicates that the operator is requesting the ground relay to be reset. Ground Relay Lockout Trainline Input - a TRUE value indicates that at least one locomotive within the consist is experiencing a ground relay lockout condition. Ground Relay Not Cutout: A TRUE value indicates that the ground relay device is NOT cutout. Grid Shorting Contactor 1: A value of TRUE indicates that the GS1 contactor has closed, is energized, etc. Grid Shorting Contactor 1: Grid Shorting Contactor 2: A value of TRUE indicates that the GS2 contactor has closed, is energized, etc. Grid Shorting Contactor 2: A true indicated that the system is ready to make the next grid step. This is the final grid step desired for inverter 1. This is the final grid step desired for inverter 1. g_tmfld_des - &tm_field_current_desired GTO Power Supply #1 Contactor Feedback: A TRUE value indicates the contactor is in the closed position. GTO Power Supply #1 Contactor: A TRUE value causes the contactor to close and the power supply to be activated. GTO Power Supply #2 Contactor Feedback: A TRUE value indicates the contactor is in the closed position. SIGNAL DESCRIPTIONS B-40

GTO2>

&SIG_IO_STATE(GTO2)

GTOPS1<

&SIG_IO_STATE(GTO1)

GTOPS1>

&SIG_IO_STATE(GTO1)

GTOPS2<

&SIG_IO_STATE(GTO2)

GTOPS2>

&SIG_IO_STATE(GTO2)

GTOPS3<

&SIG_IO_STATE(GTOPS3)

GTOPS3>


GTOPS4<


GTOPS4>


HBLC<

&SIG_IO_STATE(HBLC)

HBOL<

&SIG_IO_STATE(HBOL)

HBSF<

&SIG_IO_STATE(HBSF)

HBTL<

&SIG_IO_STATE(HBTL)

HCE<

&SIG_IO_STATE(HCE)

Hdlt 1< Hdlt 2< HdltFH<

&SIG_IO_STATE(HDLT_1) &SIG_IO_STATE(HDLT_2) &SIG_IO_STATE(HDLTFH)

HdltFL<

&SIG_IO_STATE(HDLTFL)

HdltFr<

&SIG_IO_STATE(HDLTFR)

GTO Power Supply #2 Contactor: A TRUE value causes the contactor to close and the power supply to be activated. AC Locomotive: Feedback from PS-GTO #1 indicative of power supply health--no feedback means sick or turned off power supply. GTO Regulated Power Supply #1 enable: A TRUE value causes the PS-GTO #1 to turn on & supply 24V to TCC#1. AC Locomotive: Feedback from PS-GTO #2 indicative of power supply health--no feedback means sick or turned off power supply. GTO Regulated Power Supply #2 enable: A TRUE value causes the PS-GTO #2 to turn on & supply 24V to TCC#2. AC Locomotive: Feedback from PS-GTO #3 indicative of power supply health--no feedback means sick or turned off power supply. GTO Regulated Power Supply #3 enable: A TRUE value causes the PS-GTO #3 to turn on & supply 24V to ..... . AC Dual Mode Locomotive: Feedback from PS-GTO #4 indicative of power supply health--no feedback means sick or turned off power supply. GTO Regulated Power Supply #4 enable: A TRUE value causes the PS-GTO #4 to turn on & supply 24V to ..... . Hot Bearing Locomotive: A value of TRUE indicates that a hot TM support bearing has been detected on the locomotive. First used on Amtrak F59PHI 966722 (SWG/MW). Hot Bearing Other Locomotive: A value of TRUE indicates that a hot TM support bearing has been detected on another locomotive in the consist (based on Trainline #10 input). First used on Amtrak F59PHI 966722 (SWG/MW). Hot Bearing System Failure: A value of TRUE indicates that the hot TM support bearing detection system has failed. First used on Amtrak F59PHI 966722 (SWG/MW). Hot Bearing Trainline: A value of TRUE indicates that a hot TM support bearing fault has been detected somewhere on the train. First used on Amtrak F59PHI 966722 (SWG/MW). Hostler Control Enable Relay Feedback - a TRUE value indicates that the HCE relay is picked up. Headlight Switch #1 On/Off Headlight Switch #2 On/Off Front Headlight in "High" position. First used on Queensland GT42CU-AC 969160 order as an event recorder input (EM2000 to ICE - reference specification section 15.1) Front Headlight in "Low" position. First used on Queensland GT42CU-AC 969160 order as an event recorder input (EM2000 to ICE - reference specification section 15.1). Front Headlight High Beam switch: A TRUE value indicates that the switch is in the closed (high beam) position. Signal provided to ICE internal event recorder. FUO- GT46CWL


HdltRH< HdltRL< HdltRr< HEP A HEP A L HEP A R HEP EFF HEP Frq HEP KVA HEP V Hep_Pr HEPCCB< HEPINHP HEPINPW HEPL<

HEPL>

HEPMode HEPMsg HEPOn< HEPOTHP

&SIG_IO_STATE(HDLTRH)

Rear Headlight in "High" position. First used on Queensland GT42CU-AC 969160 order as an event recorder input (EM2000 to ICE - reference specification section 15.1). &SIG_IO_STATE(HDLTRL) Rear Headlight in "Low" position. First used on Queensland GT42CU-AC 969160 order as an event recorder input (EM2000 to ICE - reference specification section 15.1). &SIG_IO_STATE(HDLTRR) Rear Headlight High Beam switch: A TRUE value indicates that the switch is in the closed (high beam) position. Signal provided to ICE internal event recorder. FUO- GT46CWL &ANA_IN_SLOW(HEP_A) Head End Power phase current feedback from current transformer and full-wave rectifier (reference Ireland JT42HCW) &ANA_IN_SLOW(HEP_A_L) Head End Power Left trainline bus current feedback from current transformer and full-wave rectifier (reference LIRR DE/DM30-AC) &ANA_IN_SLOW(HEP_A_R) Head End Power Right trainline bus current feedback from current transformer and full-wave rectifier (reference LIRR DE/DM30-AC) &ANA_IN_SLOW(HEP_EFF) The instantaneous operational efficiency of the inverter that is presently supplying HEP. &ANA_IN_SLOW(HEP_FRQ) Normal HEP Electrical Frequency: If standby HEP is active this signal is substituted at the low level to use the SBY_FRQ input. &hep_va Head end VA or apparent power. &ANA_IN_SLOW(HEP_V) Head End Power line to line voltage feedback from feedback transformers and three-phase rectifier bridge [ala Ireland JT42HCW]. &hep_power hep_power - &hep_power &SIG_IO_STATE(HEPCCB) HEP Control Circuit Breaker Input - a TRUE value indicates that the HEP Control Circuit Breaker is CLOSED. &ANA_IN_SLOW(HEP_INPUT_P The power input to DCL-Inverter supplied HEP system in units of Horsepower. Measured at OWER) the DC link input out the HEP inverter &ANA_IN_SLOW(HEP_INPUT_P The power input to DCL-Inverter supplied HEP system in units of Watts Measured at the DC OWER) link input out the HEP inverter. &SIG_IO_STATE(HEPL) Head End Power Left side positive contactors digital output for Standard LCC Controlled HEP Type with DC HEP Bus Switching option for EW&S. A value of TRUE indicates that both the PLC and NRC contactors are picked up. &SIG_IO_STATE(HEPL) Head End Power Left side bus output contactor for Standard LCC Controlled HEP Type with DC HEP Bus Switching option. A value of TRUE picks up both the PLC and the NRC contactors. &hep_mode Head end power operating mode. &STR_DEVICE(HEPMSG) These bytes present the displayed message for the health of the locomotive electrical control system. Ref EDPS 400 5.5.9. &SIG_IO_STATE(HEPON) HEP On Input - a TRUE value indicates that the HEP system is active. &ANA_IN_SLOW(HEP_OUTPUT_ The HEP system output power in terms of Horsepower. REAL_POWER)


HEPR<

HEPR>

HEPRLS< HEPRLS> HEPRRS< HEPRRS> HEPSHHP HEPSHPW HEPSLo< HEPSLo>

HEPStat HFC< HFC> HGR<

HGRR>

Horn< Horn< HornA< HornB< HornSq<

&SIG_IO_STATE(HEPR)

Head End Power Right side positive contactors digital output for Standard LCC Controlled HEP Type with DC HEP Bus Switching option for EW&S. A value of TRUE indicates that both the PRC and NLC contactors are picked up. &SIG_IO_STATE(HEPR) Head End Power Right side bus output contactor for Standard LCC Controlled HEP Type with DC HEP Bus Switching option. A value of TRUE picks up both the PRC and the NLC contactors. &SIG_IO_STATE(HEPRLS) HEP Ready Relay - Left Side - Feedback from the HEPRLS relay. &SIG_IO_STATE(HEPRLS) HEP Ready Left Side &SIG_IO_STATE(HEPRRS) HEP Ready Relay - Right Side - Feedback from the HEPRRS relay. &SIG_IO_STATE(HEPRRS) HEP Ready Right Side &ANA_IN_SLOW(HEP_SHAFT_P The equivalent brake power used to calculate HEP in units of Horsepower. OWER) &ANA_IN_SLOW(HEP_SHAFT_P The equivalent brake power used to calculate HEP in units of Watts. OWER) &SIG_IO_STATE(HEPSLO) HEP Source Local - Feedback from the HEPSLo Relay &SIG_IO_STATE(HEPSLO) Head End Power Source Local - This output drives the HEPSLo relay, which is used to establish the proper HEP Trainline Complete circuit path, previously accomplished via Rotary Selector Switch position. &DISCRETE_OUT(HEPSTAT) This byte indicates the health of the locomotive HEP system. Ref EDPS 400 5.5.19. &SIG_IO_STATE(HFC) Head End Power Field Contactor interlock feedback for Standard LCC Controlled HEP Type. A value of TRUE indicates that the HFC is closed (picked up). &SIG_IO_STATE(HFC) Head End Power Field Contactor for Standard LCC Controlled HEP Type. Connects the Companion Alternator to the HEP SCR bridge when TRUE. &SIG_IO_STATE(HGR) HEP Ground Relay digital input for Standard LCC Controlled HEP Type. A value of TRUE indicates that the ground relay has picked up, and is latched. This requires a RESET output on the HGRR to reset the relay. &SIG_IO_STATE(HGRR) Head End Power Ground Relay Reset digital output for Standard LCC Controlled HEP Type. A value of TRUE asserts the ground relay reset coil, resetting the ground relay. Used intermittently only. &SIG_IO_STATE(HORN) A TRUE value indicates a request from the operators console for activation of the horn. &SIG_IO_STATE(HORN) Derived Horn Signal. &SIG_IO_STATE(HORNA) A TRUE value indicates a request from the operators console in Cab #1 for activation of the horn (Request through CAB1). &SIG_IO_STATE(HORNB) A TRUE value indicates a request from the operators console in Cab #2 for activation of the horn (Request through CAB2). &SIG_IO_STATE(HORNSQ) Horn Sequencer: A foot switch from the operator's console. A value of TRUE initiates the desire to start a horn sequence or stop the sequence that is already in progress.


HOT_AIR HPL< HPPWFA HPR< HrnCty< HrnTwn< HrsePwr HslKey<

HstlPw<

HSU< HSU> HTR< HTR> HVACOK< HWR< HWR> Hz25BP<

I Ave I High I Low

&SIG_IO_STATE(HOT_AIR) &SIG_IO_STATE(HPL)

Indicates EMDEC has detected engine air temperature over 125F. HEP Positive Left relay input for Standard LCC Controlled HEP Type. Indicates left side HEP bus is positive polarity on DC HEP system when TRUE. &ANA_IN_SLOW(HEP_POWER_ The instantaneous HEP power factor of the total HEP system - including both local and trainline FACTOR) HEP. &SIG_IO_STATE(HPR) HEP Positive Right relay input for Standard LCC Controlled HEP Type. Indicates right side HEP bus is positive polarity on DC HEP system when TRUE. &SIG_IO_STATE(HRNCTY) "Country" horn input. First used on Queensland GT42CU-AC locomotives (969160 order). EM2000 to ICE communications for event recorder (reference specification section 15.1). &SIG_IO_STATE(HRNTWN) "Town" horn input. First used on Queensland GT42CU-AC locomotives (969160 order). EM2000 to ICE communications for event recorder (reference specification section 15.1). &mg_power Locomotive tractive horsepower. &SIG_IO_STATE(HSLKEY) Hostler Control Key Input - This input indicates that the control key at the hostler stand console has been inserted and moved to the active control position. Additional logic is needed to determine if the selected console controls will be enabled. (1st &SIG_IO_STATE(HSTLPW) Hostler Stand Power Enabled bit sent from Micro Air Brake System. A TRUE value indicates that all air brake conditions have been met to allow enabling the hostler stand for power operation. &SIG_IO_STATE(HSU) Head End Power Set Up relay feedback for Standard LCC Controlled HEP Type. Affects TrainLine Complete circuit - cannot be tested. &SIG_IO_STATE(HSU) Head End Power Set Up relay output for Standard LCC Controlled HEP Type. Untested device, as the circuit affects the TrainLine Complete circuit. &SIG_IO_STATE(HTR) Main Reservoir Drain Value Heater Relay Feedback: A TRUE value indicates the relay is in the closed position. &SIG_IO_STATE(HTR) Drain Valve Heater Relay: A value of TRUE activates the air system drain valve heater. &SIG_IO_STATE(HVACOK) HVAC OK input - a TRUE value indicates that the HVAC system on the locomotive is in a health condition of OK. &SIG_IO_STATE(HWR) Heated Windshield Relay Feedback: A TRUE value indicates that the relay is in the closed position. &SIG_IO_STATE(HWR) Heated Windshield Relay: A TRUE value causes the relay to close and activates the windshield heater. &SIG_IO_STATE(HZ25BP) Hertz 25 ByPass - A TRUE value for this signal represents a request to ByPass the 25Hz EMI monitoring feature, and/or traction inhibit due to excessive 25Hz levels detected, on Dual Mode locomotives. &average_tm_current_slow Average traction motor current (0-9999 amps) &high_tm_current_slow Highest traction motor current. &low_tm_current_slow Lowest traction motor current.


I_Gain I1_info I1pTqLm I1ResFc I1ResSt I1rStFl I1rStSt I1Tq_Fc I1Tq_St I1WrnCd I1WrnFg I2_info I2pTqLm I2ResFc I2ResSt I2rStFl I2rStSt I2Tq_Fc I2Tq_St I2WrnDd I2WrnFg

¤t_error_gain current_gain - ¤t_error_gain &inv_comm_info[0].state_flag inv_comm_info - &inv_comm_info[0].state_flag &protection_inv_torque_limit[0] inv1_p_trq_lim - &protection_inv_torque_limit[0] &inv_int_reset_info_list[0].fault_co inv1_res_cd - &inv_int_reset_info_list[0].fault_code de &inv_int_reset_info_list[0].state_fla inv1_res_flg - &inv_int_reset_info_list[0].state_flag g &drop_load_data.inv_reset_info_lis inv1_rst_fl - &drop_load_data.inv_reset_info_list[0].fault_code t[0].fault_code &drop_load_data.inv_reset_info_lis inv1_rst_st - &drop_load_data.inv_reset_info_list[0].state_flag t[0].state_flag &inv_torque_lim_info_list[0].fault_c inv1_torlmcd - &inv_torque_lim_info_list[0].fault_code ode &inv_torque_lim_info_list[0].state_f inv1_torlm_fl - &inv_torque_lim_info_list[0].state_flag lag &inv_warning_info_list[0].fault_cod inv1_warn_cd - &inv_warning_info_list[0].fault_code e &inv_warning_info_list[0].state_fla inv1_warn_flg - &inv_warning_info_list[0].state_flag g &inv_comm_info[1].state_flag inv_com_fail2 - &inv_comm_info[1].state_flag &protection_inv_torque_limit[1] inv2_p_trq_lim - &protection_inv_torque_limit[1] &inv_int_reset_info_list[1].fault_co inv2_res_cd - &inv_int_reset_info_list[1].fault_code de &inv_int_reset_info_list[1].state_fla inv2_res_flg - &inv_int_reset_info_list[1].state_flag g &drop_load_data.inv_reset_info_lis inv2_rst_fl - &drop_load_data.inv_reset_info_list[1].fault_code t[1].fault_code &drop_load_data.inv_reset_info_lis inv2_rst_st - &drop_load_data.inv_reset_info_list[1].state_flag t[1].state_flag &inv_torque_lim_info_list[1].fault_c inv2_torlmcd - &inv_torque_lim_info_list[1].fault_code ode &inv_torque_lim_info_list[1].state_f inv2_torlm_fl - &inv_torque_lim_info_list[1].state_flag lag &inv_warning_info_list[1].fault_cod inv2_warn_cd - &inv_warning_info_list[1].fault_code e &inv_warning_info_list[1].state_fla inv2_warn_flg - &inv_warning_info_list[1].state_flag g SIGNAL DESCRIPTIONS B-45

IcABAlr

&SIG_IO_STATE(ICABALR)

IcACab

&DISCRETE_OUT(ICACAB)

IcAfcd1

&SHORT_U_IN(ICAFCD[0])

IcAfcd2 IcAfcd3 IcAfcd4 IcAfcd5 IcAlCut

&SHORT_U_IN(ICAFCD[1]) &SHORT_U_IN(ICAFCD[2]) &SHORT_U_IN(ICAFCD[3]) &SHORT_U_IN(ICAFCD[4]) &DISCRETE_OUT(ICALCUT)

IcAltd<

&ANA_IN_SLOW(ICALTD<)

IcAltI IcAltRs IcAltV IcAnKey

&ANA_OUT(ICALTI) &SIG_IO_STATE(ICALTRS) &ANA_OUT(ICALTV) &DISCRETE_OUT(ICANKEY)

IcAorTE IcAS En IcAS Rq

&DISCRETE_OUT(ICAORTE) &DISCRETE_OUT(ICAS_EN) &DISCRETE_IN(ICAS_RQ)

IcBCPPS

&ANA_IN_SLOW(ICBCP)

IcBCPrV

&SIG_IO_STATE(ICBCPRV)

IcBkFlt

&DISCRETE_OUT(ICBKFLT)

IcBl Sw IcBrkSt

&DISCRETE_OUT(ICBL_SW) &DISCRETE_OUT(ICBRKST)

IcBWLoc IcBWTln

&DISCRETE_OUT(ICBWLOC) &DISCRETE_OUT(ICBWTLN)

A TRUE value indicates that the air brake system is requesting that the trainline alarm be generated. First used on Queensland GT42CU-AC order (969160). Provides ICE with information as to which cab station throttle controller is active. Highest Priority active fault code to be sent to ICE for the EMD Expert. Set to 1 indicates no fault active. The second highest priority fault code to be sent to ICE for the EMD expert. The third highest priority fault code to be sent to ICE for the EMD expert. The fourth highest priority active fault code to be sent to ICE for the EMD expert. The firth highest active fault code to be sent to ICE for the EMD expert. This value indicates whether the alerter is cut in or cut out. A value of 01 indicates cut in and 10 indicates cut out. This signal is for ICE. It indicates the current altitude as received from the GPS system. Zero altitude is defined as mean sea level. Ref EDPS 400 5.6.9. The main alternator DC output current. A TRUE value indicates that the alerter reset switch has been triggered. The main alternator DC output voltage. A value of TRUE indicates that Annett's Key has been removed. Used on Westrail order 959110. A TRUE value indicates a Tractive Effort Meter. A FALSE value indicates an amp meter. A TRUE value indicates that the current alarm may be silenced. A TRUE(2) value indicates that the operator has requested that the alarm be silenced. A value of FALSE(1) indicates no request. Indication of Brake Cylinder Pressure from the Electronic Air Brake (EAB) system through the ICE system. Ref: EDPS400, section 5.4.29 Brake Cylinder Pressure Validation signal coming from ice via serial link. Indicates whether the Brake Cylinder Pressure signal is valid. A value of TRUE indicates that the brake fault warning is on. Brake fault warning is defined as BCP above 40 kpa or the spring parking brake is applied. This is also referred to as traineline SN. Used on Westrail order 959110. A TRUE value indicates that the bell has been activated. This value indicates whether the train brakes are applied or released within the train make-up (coach cars & locos). A value of 01 indicates that the train brakes are applied (Based on BRAPLD=TRUE). A value of 10 indicates that the train brakes are rele A TRUE value indicates that a brake warning is being indicated by the local unit. A TRUE value indicates that a brake warning is being indicated by the trainline.


IcCdHrn

&DISCRETE_OUT(ICCDHRN)

IcCNWCt IcComIf IcCSCNO IcCSCut

&DISCRETE_OUT(ICCNWCT) &ice_comm_info &DISCRETE_OUT(ICCSCNO) &DISCRETE_OUT(ICCSCUT)

IcCTStp

&DISCRETE_IN(ICCTSTP)

IcDB Rq IcDB%

&ANA_IN_SLOW(ICDB_RQ) &ANA_OUT(ICDB%)

IcDBAct

&DISCRETE_OUT(ICDBACT)

IcDBCRq

&ANA_IN_SLOW(ICDBCRQ)

IcDBCut

&DISCRETE_OUT(ICDBCUT)

IcDBHnd IcDBHnV

&ANA_OUT(ICDBHND) &SIG_IO_STATE(ICDBHNV)

IcDBHRR

&DISCRETE_IN(ICDBHRR)

IcDBInt

&DISCRETE_OUT(ICDBINT)

IcDBIRq

&DISCRETE_IN(ICDBIRQ)

IcDBOnl IcDBPeV

&SIG_IO_STATE(ICDBONL) &SIG_IO_STATE(ICDBPEV)

IcDBSRq

&DISCRETE_IN(ICDBSRQ)

IcDetDt

&DISCRETE_OUT(ICDETDT)

A TRUE value indicates that the conductor's horn button has been activated. This is not to be used for resetting any crew alertness device. A TRUE value indicates that the C&NW ATS cab signal system is cutout. ice_comm_info - &ice_comm_info A TRUE value indicates that the cab signal speed control system is operational. This value indicates whether the speed limiter/cab signal is cut out. A value of 01 indicates cut in and 10 indicates cut out. This value indicates whether there is a trainline engine stop request with the electronic controller. A value of 01 indicates no request and 10 indicates a trainline engine stop request. This value indicates the amount of full dynamic brake requested by the DLCP in percent. This value indicates the amount of full dynamic brake with a continuously variable controller (electronic controller). A value of TRUE indicates that the consist operator has requested dynamic brake as indicated by DB_17T. This value indicates the amount of dynamic brake control voltage that the DLCP is commanding (trainline 24T). This value indicates whether the dynamic brake is cut out on the engine control panel. A value of 01 indicates the DB is not cutout. A value of 10 indicates cutout. The dynamic brake handle position as indicated by TL_24T. A TRUE value indicates that the dynamic brake handle position is valid. First used on Phase II 976804 order. A value of 01 (hex 1) indicates a request for the #1 driving position to have air brake control. A value of 10 (hex 2) indicates a request for the #2 driving position to have air brake control. Used on Westrail order 959110. This value indicated whether the dynamic brake interlock (trainline 17T) is active. A value of 01 indicates that the DB interlock is not active. A value of10 indicates that the DB interlock is active. This value indicates whether the DLCP has commanded a dynamic brake interlock request (trainline 21T) for the unit to go into DB. A value of 01 indicates no request and 10 indicates a request to dynamic brake interlock operation. A TRUE value indicates that the locomotive is set for DB only operation. A TRUE value indicates that the continuous dynamic brake percent is valid. First used on Phase II 976804 order. This value indicates whether the DLCP has commanded dynamic brake setup (trainline 17T). A value of 01 indicates no request and 10 indicates a dynamic brake setup request. A TRUE value indicates that the detonator detector has been activated.


IcDirMo

&DISCRETE_OUT(ICDIRMO)

IcDirRq

&DISCRETE_IN(ICDIRRQ)

IcDorSt

&DISCRETE_OUT(ICDORST)

IcDPBet

&DISCRETE_IN(ICDPBET)

IcDPCOv IcDPEnb

&DISCRETE_OUT(ICDPCOV) &DISCRETE_IN(ICDPENB)

IcDPLnk

&DISCRETE_IN(ICDPLNK)

IcDPMBe

&SIG_IO_STATE(ICDPMBE)

IcDPSt

&DISCRETE_IN(ICDPST)

IcDulIn IcDulOt IcDum IcDum1 IcEgRPM IcEgTmp IcEnRun IcER Rq

(char *) 0x90000300 (char *) 0x90000000 &DISCRETE_OUT(ICDUM) &DISCRETE_OUT(ICDUM) &ANA_OUT(ICEGRPM) &ANA_OUT(ICEGTMP) &DISCRETE_OUT(ICENRUN) &DISCRETE_IN(ICER_RQ)

IcEvntS

&DISCRETE_OUT(ICEVNTS)

IcEWVl<

&ANA_IN_SLOW(ICEWVL<)

First used on Queensland GT42CU-AC order (969160). Informs ICE as to which direction the locomotive is actually moving. This value shows the direction request by the DLCP. A value of 00 is no request, 01 is a forward (8T) request, and 10 is a reverse (9T) request, and 11 is an illegal combination. This value indicates whether the coach doors are closed within the train make-up (coach cars). A value of 01 indicates that the Coach Doors are NOT closed (Based on DRCLOS=FALSE). A value of 10 indicates that the Coach Doors are closed (Based on DRCLOS This value indicates whether the DLCP heartbeat keep alive received status is true or false. A value of 01 indicates that the heartbeat keep alive is false and 10 indicates that the heartbeat keep alive is true. A TRUE value indicates that the DPC Override switch is activated This value indicates whether the DLCP has enabled distributed power on the locomotive. A value of 01 indicates that distributed power is not enabled and 10 indicates that distributed power is enabled. This value indicates whether the DLCP has linked the locomotive to other distributed power locomotives in the train. A value of 01 indicates that the unit is not linked and 10 indicates that the unit is linked in distributed power. This value indicates whether the DPM heartbeat keep alive received status is true or false. A value of 01 indicates that the heartbeat keep alive is false and 10 indicates that the heartbeat keep alive is true. This value indicates the distributed power state of the locomotive (lead or remote). A value of 00 indicates that the locomotive is not set up for distributed power. A value of 01 indicates that the unit is setup as a lead distributed power locomotive, ice_dual_in - 0x90000300 ice_dual_out - 0x90000000 Used for internal purposes. Used for internal purposes. The engine rpm. This signal is for ICE. The engine water temperature. A value of TRUE indicates that the consist operator console has the switch on. This value indicates that the DLCP has commanded that the engine run switch be up (trainline 16T). A value of 01 indicates that the engine run switch is to be down and 10 indicates that the engine run switch is to be up. First used on Queensland GT42CU-AC order (969160). This sends the status of EM2000 monitored spare digital inputs ERSpr1 & ERSpr2 (Event Recorder Spare 1 &2) to ICE for event recorder purposes only. This signal indicates the current East/West velocity as received from the GPS system. A positive value is defined as East. Ref EDPS 400 5.6.11. SIGNAL DESCRIPTIONS B-48

IcExd A IcExdTE

&ANA_OUT(ICEXD_A) &ANA_OUT(ICEXDTE)

IcFan 1

&DISCRETE_OUT(ICFAN)

This is the excellence value in Amps to send to ice. The value of the amp meter when the short time region is entered. If a TE meter is selected this is the short time tractive effort. If this is the case, the scale factor is 1000 lb./bit. An encoded bit pattern indicating the engine cooling fan #1 status. 0101b = OFF 0110b = HALF SPEED (Dual Speed Fans Only)

IcFan 2


1001b = FULL SPEED An encoded bit pattern indicating the engine cooling fan #2 status. 0101b = OFF 0110b = HALF SPEED (Dual Speed Fans Only)

IcFan 3


1001b = FULL SPEED An encoded bit pattern indicating the engine cooling fan #3 status. 0101b = OFF 0110b = HALF SPEED (Dual Speed Fans Only)

IcFBlw< IcFBlwV IcFL Rq

&SIG_IO_STATE(ICFBLW) &SIG_IO_STATE(ICFBLWV) &DISCRETE_IN(ICFL_RQ)

IcFLInh

&DISCRETE_OUT(ICFLINH)

IcFLMAk

&DISCRETE_OUT(ICFLMAK)

IcFLMnt

&DISCRETE_IN(ICFLMNT)

1001b = FULL SPEED A TRUE value indicates that the FIRE system would like its blower turned on. A TRUE value indicates that the FIRE system would like its blower turned on. A TRUE(2) value indicates that overall locomotive system controller (Rockwell ICE) requests the EMD control computer to activate the flange lube magnet valves. A FALSE(1) value indicates no request for lubrication. A value of 1 indicates NO_REQUEST has been received. A value of 2 indicates the flange lube has been inhibited. A value of 1 indicates no request for pump prime or system test. A value of 2 indicates a request for a system test has been received. A value of 3 indicates a request for pump prime has been received. A NO_REQUEST (1) value indicates the operator is not requesting pump prime or system test. A PUMP_PRIME (2) value indicates the operator is requesting pump prime. A SYSTEM_TEST (3) value indicates the operator is requesting a system test.


IcFLPIn

&DISCRETE_OUT(ICFLPIN)

IcFLTIn IcFLTSt

&DISCRETE_OUT(ICFLTIN) &DISCRETE_OUT(ICFLTST)

IcFRAct

&DISCRETE_OUT(ICFRACT)

IcFS A IcFS Rq

&ANA_OUT(ICFS_A) &DISCRETE_IN(ICFS_RQ)

IcFS TE

&ANA_OUT(ICFS_TE)

IcFulKG IcGF Rq

&ANA_IN_SLOW(ICFUL) &DISCRETE_IN(ICGF_RQ)

IcGFAct

&DISCRETE_OUT(ICGFACT)

IcGFExc IcGFSw> IcGHea IcGRSt IcGVelM IcHdLgt

&DISCRETE_OUT(ICGFEXC) &DISCRETE_OUT(ICGFSW>) &ANA_IN_SLOW(ICGHEA) &DISCRETE_OUT(ICGRST) &ANA_IN_SLOW(ICGVEL) &DISCRETE_OUT(ICHDLGT)

IcHrnSw

&DISCRETE_OUT(ICHRNSW)

IcInBuf IcIs Sw IcLat<

&ice_input_buffer &DISCRETE_OUT(ICIS_SW) &ANA_IN_SLOW(ICLAT<)

IcLcAlr

&DISCRETE_OUT(ICLCALR)

IcLD A IcLD TE

&ANA_OUT(ICLD_A) &ANA_OUT(ICLD_TE)

A value of 1 indicates no inhibit active. A value of 2 indicates PUMP_PRIME has been inhibited. A value of 1 indicates no inhibit. A value of 2 indicates the flange lube system test is inhibited. A value of 1 indicates no request for flange lube test has been received. A value of 2 indicates the flange lube test is in progress. This value indicates whether the fault reset button has been activated (generally trainline 26T). A value of 01 indicates that the fault reset is not active. A value of 10 indicates that the fault reset is active. The full scale in amps for ICE. This value indicates whether the DLCP has commanded a trainline fault reset (typically trainline 26T). A value of 01 indicates no request and 10 indicates a trainline fault reset request. The full scale value of the amp meter. If a TE meter is selected this is the full scale tractive effort. If this is the case, the scale factor is 1000 lb./bit. The locomotive fuel level in thousands of gallons/liters. It is a 2 byte number. This value indicates whether the DLCP has commanded that the generator field switch be up (trainline 6T active if the throttle is out). A value of 01 indicated no request and 10 indicates a request for generator field switch up. This value indicates whether a ground fault has been detected. A value of 01 indicates that a ground fault is not active. A value of 10 indicates that a ground fault is active. This signal is for ICE. A TRUE value indicates that the GF_REQ of the locomotive is active. A TRUE value indicates that the generator field switch is UP. Ref EDPS 400 5.1.74. This signal indicates the current velocity as received from the GPS system. A TRUE value indicates that the ground relay is tripped. This signal indicates the current velocity as received from the GPS system. First used on Queensland GT42CU-AC order (969160). This is for ICE event recorder purposes. Indicates status of Front and Rear headlights - both "Low" and "High". A TRUE value indicates that the engineer's horn has been activated. This signal can be used for the purpose of resetting crew alertness devices. ice_in_buf - ice_input_buffer A TRUE value indicates that the isolation switch is in the isolate position. This signal is for ICE. It indicates the current latitude as received from the GPS system. Zero latitude is defined as the equator. North is positive. Ref EDPS 400 5.6.7. This value indicates whether the locomotive alarm is active. A value of 01 indicates that the alarm is not active. A value of 10 indicates that the alarm is active. The ammeter for ICE. The load that is being created by the locomotive. The type of meter (TE or AMP) depends on the value of AMP_TE_METER. If the meter is in the Amp mode, the scale factor is 1. SIGNAL DESCRIPTIONS B-50

IcLHHLt IcLMov> IcLMovV

&DISCRETE_OUT(ICLHHLT) &SIG_IO_STATE(ICLMOV) &SIG_IO_STATE(ICLMOVV)

IcLoAlr IcLoArS IcLocWt IcLong<

&DISCRETE_OUT(ICLOALR) &DISCRETE_OUT(ICLOARS) &ANA_OUT(ICLOCWT) &ANA_IN_SLOW(ICLONG<)

IcLoVeV

&SIG_IO_STATE(ICLOVEV)

IcLR V IcLSIh

&ANA_OUT(ICLR_V) &DISCRETE_OUT(ICLSIH)

IcLTSnd IcLTSRq IcLUnt>

&DISCRETE_OUT(ICLTSND) &DISCRETE_IN(ICLTSRQ) &DISCRETE_OUT(ICLUNT>)

IcM Snd IcMPRed

&DISCRETE_OUT(ICM_SND) &DISCRETE_OUT(ICMPRED)

IcMS Rq

&DISCRETE_IN(ICMS_RQ)

IcMSIh

&DISCRETE_OUT(ICMSIH)

IcMTst> IcNSVl<

&DISCRETE_OUT(ICMTST>) &ANA_IN_SLOW(ICNSVL<)

IcNwAD> IcOscHL IcOvrSp IcPBApl

&SIG_IO_STATE(ICNWAD) &DISCRETE_OUT(ICOSCHL) &DISCRETE_OUT(ICOVRSP) &DISCRETE_OUT(ICPBAPL)

A value of TRUE indicates that the long hood headlight is on. Used on Westrail order 959110. A TRUE value indicates that the locomotive is moving. A TRUE value indicates that the locomotive moving signal brake is valid. First used on Phase II 976804 order. A TRUE value indicates that the local alarm is on. A TRUE value indicates that the local alarm has been silenced. Weight of the locomotive. This signal is for ICE. It indicates the current longitude as received from the GPS system. Zero longitude is defined as the Prime Meridian. East is positive. Ref EDPS 400 5.6.8. A TRUE value indicates that the locomotive velocity is valid. First used on Phase II 976804 order. The load regulator wiper voltage. This byte indicates whether lead truck sanding is inhibited. This is available on units that have sanding through the ICE display. A value of TRUE indicates that the local operator has requested lead truck sanding. A TRUE value indicates that lead truck sanding is requested. A TRUE value indicates that the local reverser handle position is either forward or reverse (meaning that the locomotive is the lead unit). Ref EDPS 400 5.1.76. A value of TRUE indicates that the local operator has requested manual sanding. A value of 00 (hex 0) indicates Manual Power Reduction is not requested. A value of 01 (hex 1) indicates that Local Manual Power Reduction is requested. A value of 10 (hex 2) indicates that Trainline Manual Power Reduction is requested. This value indicates whether the DLCP has commanded manual sanding (trainline 23T). A value of 01 indicates no request and 10 indicates a manual sand request. This byte indicates whether manual truck sanding is inhibited. This is available on units that have sanding through the ICE display. A TRUE value indicates that a meter test is in progress. Ref EDPS 400 5.1.75. This signal indicates the current North/South velocity as received from the GPS system. A positive value is defined as North. Ref EDPS 400 5.6.10. A TRUE value indicates that new archive data is available for viewing. Ref EDPS 400 5.1.78. A TRUE value indicates that the oscillating headlights are on. A TRUE value indicates that the overspeed protection device has tripped. This value is for ICE. It indicates whether the locomotive parking brake is applied. A value of 01 indicates that the parking brake is not applied. A value of 10 indicates that the parking brake is applied. A value of 00 indicates that the parking bra


IcPBAR<

&SIG_IO_STATE(ICPBAR)

IcPCSOp IcPlgRq

&DISCRETE_OUT(ICPCSOP) &DISCRETE_IN(ICPLGRQ)

Icpres IcPRPct IcPwrRq

&ice_present &ANA_OUT(ICPRPCT) &ANA_IN_SLOW(ICPWRRQ)

IcRcSpV

&SIG_IO_STATE(ICRCSPV)

IcReMph IcRrEm> IcRSTI>

&ANA_OUT(ICRE) &SIG_IO_STATE(ICRREM) &DISCRETE_OUT(ICRSTI>)

IcRunSw IcRvPos

&DISCRETE_OUT(ICRUNSW) &DISCRETE_OUT(ICRVPOS)

First used on the Queensland GT42CU-AC order (969160). A value of 0 in bit #4 indicates that the parking brake is to be released. A value of 1 in bit #4 indicates that the parking brake is to be applied. A FALSE value indicates that the PCs is open. This value indicates whether the locomotive is being requested to go into speed control plugging mode. This is used in distributed power on remote units. A value of 1 means no request and 2 means plugging mode is requested. (EDPS 400 Rev F) ice_present - &ice_present This indicates the percent load requested during Local or Trainline Manual Power Reduction. This value indicates the amount of full throttle requested by the DLCP (with electronic controller) in percent. A TRUE value indicates that the recalibrated train speed is valid. First used on Phase II 976804 order. The most correct train speed available to the EM2000 system. A TRUE value indicates that the rear emergency switch is activated. A TRUE value indicates that ICE can terminate an EM2000 remote session. Termination is inhibited during self tests, cutting in/out TM or TCC, or in speed control. Ref EDPS 400 5.1.77. A TRUE value indicates that the isolation switch is in the run position. The consist operator's reverser position. 0 = Neutral 1 = Forward 2 = Reverse

IcSC Rq

&DISCRETE_IN(ICSC_RQ)

IcSCImb

&DISCRETE_IN(ICSCIMB)

IcSCntl IcSCPlg

&DISCRETE_OUT(ICSCNTL) &DISCRETE_OUT(ICSCPLG)

IcSCSpM IcSCSpM

&ANA_OUT(ICSCSP) &ANA_OUT(ICSCSP)

3 = Illegal Request This value indicates that the DLCP has commanded locomotive speed control operation (trainline 1T). A value of 01 indicates no request and 10 indicates a request for speed control. This value indicates whether the DLCP has determined that the remote locomotive is loading heavier or lighter than the lead locomotive. A value of 00 means that the loads are equalized, 01 indicates that the lead unit is loading heavier, and 10 indicates A TRUE value indicates that the locomotive is in slow speed control. Reference 15.1.5.1.36 This byte indicates whether speed control plugging mode has been requested. This is required for Distributed Power Remote unit operation. (15.1.5.1.72 Rev E) For EDPS Rev >= D. This is the SSC set speed to ICE. Reference 15.1.5.1.37. For EDPC 400 <= REV C! The set speed for the slow speed control system


IcSHHLt IcSnAct

&DISCRETE_OUT(ICSHHLT) &DISCRETE_OUT(ICSNACT)

IcSPMD>

&SIG_IO_STATE(ICSPMD)

IcSpMph IcStSpd

&ANA_OUT(ICSP) &ANA_IN_SLOW(ICSTSPD)

IcT2BCP

&SIG_IO_STATE(ICTBCP)

IcTC St

&DISCRETE_OUT(ICTC_ST)

IcTChrn IcTh%

&DISCRETE_OUT(ICTCHRN) &ANA_OUT(ICTH%)

IcThA> IcThB> IcThD> IcThPos IcThRqA

&SIG_IO_STATE(ICTHA) &SIG_IO_STATE(ICTHB) &SIG_IO_STATE(ICTHD) &DISCRETE_OUT(ICTHPOS) &DISCRETE_IN(ICTHRQA)

IcThRqB

&DISCRETE_IN(ICTHRQB)

IcThRqC

&DISCRETE_IN(ICTHRQC)

IcThRqD

&DISCRETE_IN(ICTHRQD)

IcTime<

&INT_U_IN(ICTIME<)

IcTL1T> IcTM1 A IcTM2 A IcTM3 A IcTM4 A IcTM5 A

&SIG_IO_STATE(ICTLT) &ANA_OUT(ICTM_A) &ANA_OUT(ICTM_A) &ANA_OUT(ICTM_A) &ANA_OUT(ICTM_A) &ANA_OUT(ICTM_A)

A value of TRUE indicates that the short hood headlight is on. Used on Westrail order 959110. This value is for ICE. It indicates whether the sanding indicator is to be illuminated, indicating that the sanders are in operation. A value of 01 indicates that sanding is not active. A value of 10 indicates that sanding is active. First used on Queensland GT42CU-AC order (969160). Input from the Station Protection Magnet Receiver (SPMR). Status sent to ICE, which performs Station Protection function. Locomotive Velocity: The velocity of the locomotive with long hood forward movement positive. This value indicates the locomotive speed control set speed commanded by the DLCP for remote locomotives. First used on Queensland GT42CU-AC order (969160). Used to inform ICE when Truck #2 brake cylinder level is greater than a specific PSI as determined by pressure switch BCB2 (Brake Cylinder Bogie 2). The state of the transition contactor. A TRUE(10) value indicates that the contactor is in the picked up state. First used on Queensland GT42CU-AC order (069160) for event recorder purposes. This value indicates the percent of full throttle request with a continuously variable throttle (electronic controller) The signal shall be set directly from the LCC digital input TH2468. The signal shall be set directly from the LCC digital input TH3-8. The signal shall be set directly from the LCC digital input THST56. This signal is for ICE. The throttle position of the consist operator's throttle handle. This value indicates whether the governor A valve circuit (15T) is requested. A value of 01 is no request and 10 is a governor A request. This value indicates whether the DLCP is commanding governor valve B (trainline 12T). A value of 01 indicates no B valve request and 10 indicates that B valve is requested. This value indicates whether the DLCP has commanded governor valve C (trainline 7T). A value of 01 indicates no request and 10 indicates a C valve request. This value indicates the DLCP has commanded a governor valve D (trainline 3T). A value of 01 indicates no request and 10 indicates a D valve request. This signal is for ICE. It is defined as the number of seconds that have elapsed since the start of the epoch (00:00:00 on Jan 1, 1970 UTC). TL 1T signal over serial link Traction Motor current for Motor 1 to ICE Traction Motor current for Motor 2 to ICE Traction Motor current for Motor 3 to Ice Traction Motor current for Motor 4 to Ice Traction Motor current for Motor 5 to Ice SIGNAL DESCRIPTIONS B-53

IcTM6 A IcTrAc IcTrAcV IcUDVl< IcUP Ct IcWDiai IcWH Rq IcWIsSw IcWndHT IcWS Lo IcWSTln IdesRef Idledat IdR< IdR> ImmHtr< ImmHtr> IntenSt IPR< IPR> IRT Isolat< IsoltA< IsoltB< Iv_Fcd

&ANA_OUT(ICTM_A) &ANA_OUT(ICTRAC) &SIG_IO_STATE(ICTRACV)

Traction Motor current for Motor 6 to Ice The locomotive acceleration. A third order digital filter is used to filter out sampling noise. A TRUE value indicates that the train acceleration is valid. First used on Phase II 976804 order. &ANA_IN_SLOW(ICUDVL<) This signal indicates the current Up/Down velocity as received from the GPS system. A positive value is defined as Up. Ref EDPS 400 5.6.12. &DISCRETE_OUT(ICUP_CT) A TRUE value indicates that the Union Pacific coded can signal (CCS) system is cutout. &ANA_OUT(ICWDIA) The average wheel diameter of all the wheels on the locomotive. &DISCRETE_IN(ICWH_RQ) A value of 1 indicates the heater state has not changed. A value of 2 indicates a request to turn the heater on. A value of 3 indicates the heater is requested to be off. &DISCRETE_OUT(ICWISSW) A TRUE value indicates that the isolation switch is in the winter isolate position. &DISCRETE_OUT(ICWNDHT) A value of 1 indicates that the heater is not on. A value of 2 indicates that the heater is on. A value of 3 indicates that the heater can not be turned on. &DISCRETE_OUT(ICWS_LO) This signal is for ICE. A TRUE value indicates that a wheel slip is being indicated by the local unit. &DISCRETE_OUT(ICWSTLN) This signal is for ICE. A TRUE value indicates that a wheel slip is being indicated by the trainline. ¤t_desired Current reference after rate limiting. &RUN_TOT_DATA(rt_data.lifetime idle_data - &RUN_TOT_DATA(rt_data.lifetime_throt_record[8]) _throt_record[8]) &SIG_IO_STATE(IDR) Idle Relay: A TRUE value indicated that the contactor is in the closed position. &SIG_IO_STATE(IDR) HEP Idle Relay: A TRUE value indicates that the HEP system may be requested. &SIG_IO_STATE(IMMHTR) Feedback from ImmHtr RELAY (First use LIRR) used in the wayside layover system. &SIG_IO_STATE(IMMHTR) Immersion Heater - This output is used to turn on the immersion heater within the Prime Mover Layover Protection System. &PROT_DATA(display_intensity) intensity - &PROT_DATA(display_intensity) &SIG_IO_STATE(IPR) Inverter Protection Resistor Contactor Feedback - a TRUE value indicates that the IPR contactor is picked up. &SIG_IO_STATE(IPR) Inverter Protection Resistor Contactor - This output controls the IPR path on the DE/DM30AC locomotives. &ANA_IN_SLOW(IRT) Injector response time for 16cylinder 710 engine, input from ECM #1, cylinders in order 9-1611-14-12-13-10-15, 10microseconds/bit &SIG_IO_STATE(ISOLAT) A TRUE value indicates that the Run/Isolate switch is in the Isolate position. &SIG_IO_STATE(ISOLTA) Isolation Switch In No. 1 Cab Of Two Cab Locomotives. First Used On JT42C Basic. &SIG_IO_STATE(ISOLTB) Isolation Switch In No. 2 Cab Of Two Cab Locomotives. First Used On JT42C Basic. &active_fault_code inv_flt_code - &active_fault_code


Iv_Fcl IvFcdIn IvFclIn K_bec K_fld K_gcc K_ipc K_Pr K_tsc KAT_bec KAT_fld KAT_gcc KAT_ipc KAT_Pr Kool KW Fbk KW Max KW Ref L1Atten L2Atten LAB< LABRly> LayOvr< LCBat< LCC OK> Ld_ack Ld_eSt Ld_eSt1 Ld_eSt2 LdMetr LdUnit<

&active_fault_class &inv_fault_code_input &inv_fault_class_input &K_bec &K_field &K_gcc &K_ipc &K_power &k_tsc &KAT_bec &KAT_field &KAT_gcc &KAT_ipc &KAT_power &analog_io.KOOL.slow.value &mg_power &power_available &traction_power_reference &creep_attenuation_ratio[0] &creep_attenuation_ratio[1] &SIG_IO_STATE(LAB)

inv_flt_clas - &active_fault_class inv_fcode_in - &inv_fault_code_input inv_fclass_in - &inv_fault_class_input K_bec - &K_bec K_field - &K_field K_gcc - &K_gcc K_ipc - &K_ipc K_power - &K_power k_tsc - &k_tsc KAT_bec - &KAT_bec KAT_field - &KAT_field KAT_gcc - &KAT_gcc KAT_ipc - &KAT_ipc KAT_power - &KAT_power A Kool signal Main generator output power. Power available from engine. Engine Power Available. The percent attenuation of the allowable creep by the Lunge Detector of truck #1. The percent attenuation of the allowable creep by the Lunge Detector of truck #2. Local Alarm Bell: A TRUE value indicates that the trainline alarm bell request is being generated locally. &SIG_IO_STATE(LABRLY) Local Alarm Bell Relay: A value of TRUE closes the relay causing the local alarm bell to ring. &SIG_IO_STATE(LAYOVR) A TRUE value indicates a request for the LayOver system to be activated. &SIG_IO_STATE(LCBAT) Local Control Circuit Breaker and Battery Knife Switch Closed: A TRUE value indicates that the battery knife switch is closed and the local control circuit breaker is in the on position. &SIG_IO_STATE(LCC_OK) Locomotive Control Computer Oh Kay: A value of TRUE causes the relay LCC OK (the relay formerly known as MCB) picked up to indicate that the LCC is alive and well. &load_ack load_ack - &load_ack &alternator_load_estimate load_est - &alternator_load_estimate &alternator_half_load_estimate[0] load_est1 - &alternator_half_load_estimate[0] &alternator_half_load_estimate[1] load_est2 - &alternator_half_load_estimate[1] &ANA_OUT(LDMETR) Signal output to the load meter. +9 Volts is full scale in power and -5.45 volts is full scale in brake. Characterization determines if this is a Amp Meter or a Tractive Effort Meter. &SIG_IO_STATE(LDUNIT) A TRUE value indicate that the local reverser handle is in the forward or reverse position and TL_13T is TRUE. SIGNAL DESCRIPTIONS B-55

LExTLC< LExTLC> LfTLIn< LfTLIn> LHtrCB< LinkRat LkW_Dis LkW_Fcd LkW_St LLCPCB< LM_AUX>

LM_BCPR LM_ESPD LM_HEP LMElec>

LnkValv

Lo_TM_I LocoAcc LocoMPH LocoMPH LocoRPM LocoRPM LOCPCB< LocStat LocStFg

&SIG_IO_STATE(LEXTLC) &SIG_IO_STATE(LEXTLC) &SIG_IO_STATE(LFTLIN) &SIG_IO_STATE(LFTLIN) &SIG_IO_STATE(LHTRCB)

Left External Trainline Complete - feedback from the LExTLC relay Left External Trainline Complete Left Trainline cut In - a TRUE value indicates that the LfTLIn relay has picked up. Left (HEP) Trainline Cut In Layover (Immersion) Heater Circuit Breaker Feedback - a TRUE Value indicates that the layover heater circuit breaker is CLOSED. &link_valve_ratio Separate aftercooling linking flow ratio. 0 = No flow, 1 = Full Flow &locked_wheel_disabled[0] lock_whl_dis - &locked_wheel_disabled[0] &locked_wheel_info.fault_code lockwhl_fltd - &locked_wheel_info.fault_code &locked_wheel_info.state_flag lockwhl_st - &locked_wheel_info.state_flag &SIG_IO_STATE(LLCPCB) Layover Lube oil Circulation Pump Circuit Breaker &SIG_IO_STATE(LM_AUX) Locomotive Model Auxiliary Systems Ready - This signal is required by the locomotive model (RAILS) and is set based upon the value of the LCC internal signal of aux_systems_ready. (1st Used LIRR DE30-AC). &ANA_OUT(LM_BCPR) Brake Cylinder Pressure for the Locomotive Model &ANA_OUT(LM_ESPD) The engine speed output from the EM2000 to the locomotive model. &ANA_OUT(LM_HEP) The value of the HEP OUTPUT REAL POWER feedback from the TCC model sent to the Locomotive Model via an LCC analog output. &SIG_IO_STATE(LMELEC) Locomotive Model Electric Mode Acknowledge - This signal is required by the locomotive model (RAILS) and is set based upon the value of the TCC Serial Input ELECTRIC_MODE_ACKN. (1st Used LIRR DM30-AC). &ANA_OUT(LNKVALV) Linking Valve Control: This output is used to drive the cooling system linking valve via a CAM module. The output is in terms of the voltage supplied to the CAM module. This valve is being used to transfer cold water from the aftercooling loop to the ma &low_tm_current_medium lo_tm_a - &low_tm_current_medium &locomotive_acceleration Locomotive acceleration (0.0-99.9 mph/sec or kpm per sec) &train_speed Locomotive speed from several sources. &train_speed Locomotive speed from several sources. &train_rpm Motor rpm based on train speed. &ANA_IN_SLOW(FLT_LOCO_RP The calculated locomotive RPM signal. M) &SIG_IO_STATE(LOCPCB) Layover Oil Circulation Pump Circuit Breaker feedback - a TRUE value indicates that the circuit breaker for the layover lube oil circulation pump is CLOSED. &DISCRETE_OUT(LOCSTAT) This byte indicates the health of the overall locomotive system. Ref EDPS 400 5.5.13. &ANA_STATE_FLAG(FLT_LOCO Locomotive Speed Signal State Flag. _SPD)


LoERSw<

&SIG_IO_STATE(LOERSW)

LOEWCP<

&SIG_IO_STATE(LOEWCP)

LOEWCP> LOFPrsI

&SIG_IO_STATE(LOEWCP) &ANA_IN_SLOW(LOFPRSI)

LOFPrsO

&ANA_IN_SLOW(LOFPRSO)

LOHtCB<

&SIG_IO_STATE(LOHTCB)

LOLOCP<

&SIG_IO_STATE(LOLOCP)

LOLOCP> LoMotSt LOPres<

&SIG_IO_STATE(LOLOCP) &locomotive_motion_status &SIG_IO_STATE(LOPRES)

LOS< LoSpdSr LoTqLm LoVolLm LOWTmp<

&SIG_IO_STATE(LOS) &loco_spd_source &locomotive_torque_limit &local_voltage_limit &SIG_IO_STATE(LOWTMP)

LR

&ANA_IN_SLOW(LR)

LR %Max LRC LSC<

&lr_ratio (void *) LRC_Check &SIG_IO_STATE(LSC)

LSC>

&SIG_IO_STATE(LSC)

LsRcldt LT_PrRf LtFr<

&last_recal_date &self_load_test_power_reference &SIG_IO_STATE(LTFR)

Local Engine Run Switch: A TRUE value indicates the switch on the operator control console IN THE LOCAL CAB is in the on position. This is contrasted by ER Sw, which is only indicative of the 16T trainline LayOver Engine Water Circulation Pump contactor feedback - a TRUE value indicates that the LOEWCP contactor is picked up. LayOver Engine Water Circulation Pump Lube Oil Filter Pressure IN ... this input provides an analog indication of the lube oil pressure at the INPUT to the lube oil filter. Lube Oil Filter Pressure OUT ... this input provides an analog indication of the lube oil pressure at the OUTPUT of the lube oil filter. LayOver Heater Circuit Breaker feedback - a TRUE value indicates that the circuit breaker for the LayOver immersion heater is CLOSED. LayOver Lube Oil Circulation Pump contactor feedback - a TRUE value indicates that the LOLOCP contactor is picked up. LayOver Lube Oil Circulation Pump loc_motion_st - &locomotive_motion_status Lube Oil Pressure Input: For lube oil filter bypass detection: A TRUE means do the bypass stuff. Low Oil Pressure Switch: A TRUE value indicates that the engine protector has tripped. loc_spd_source - &loco_spd_source loco_trq_lm - &locomotive_torque_limit local_vol_lm - &local_voltage_limit Lay Over Water Temperature Switch Input - a TRUE value indicates that the temperature switch(es) associated with the layover system (sensing engine water temp) is CLOSED. DC System : This represents a value which increases to 74 volts when the engine is being supplied fuel at a higher rate than desired. This value decreases to 0 volts when the engine is supplied at a normal rate. This signal is generated by the engine's g Load regulator % maximum, 0 - 100 LRC - LRC_Check Locomotive Spotter Contactor Feedback: A TRUE value indicates that the contactor is in the closed position. Locomotive Spotter Contactor: A TRUE value causes that contactor to close. Given that the remainder of the power circuit is configured properly, the battery voltage will be applied to the traction motors. last_recal_dt - &last_recal_date SLT_POWER_RF - &self_load_test_power_reference Lights Front Relay Feedback: A TRUE value indicates that the relay is in the closed position. SIGNAL DESCRIPTIONS B-57

LtFr> LtRr< LtRr> LTS Sw<

&SIG_IO_STATE(LTFR) &SIG_IO_STATE(LTRR) &SIG_IO_STATE(LTRR) &SIG_IO_STATE(LTS_SW)

LTSand>

&SIG_IO_STATE(LTSAND)

LTSSwA< LTSSwB< LTT> LTT1< LTT2< LVClsd<

&SIG_IO_STATE(LTSSWA) &SIG_IO_STATE(LTSSWB) &SIG_IO_STATE(LTT) &SIG_IO_STATE(LTT1) &SIG_IO_STATE(LTT2) &SIG_IO_STATE(LVCLSD)

LVOpen<

&SIG_IO_STATE(LVOPEN)

LWCPCB<

&SIG_IO_STATE(LWCPCB)

LWL< LwPrflg M_AnaIn M_AnaOt M_HiTmI MAB CB< MABBsy

&SIG_IO_STATE(LWL) &tcc_low_power_flag[0] &medium_analog_input_map &medium_analog_output_map &high_tm_current_medium &SIG_IO_STATE(MAB_CB) &DISCRETE_IN(MABBSY)

MABBsyA

&DISCRETE_OUT(MABBSYA)

MABDBOn MABLMph MABMaj MABMIDI MABMIDO

&DISCRETE_OUT(MABDBON) &ANA_OUT(MABL) &ANA_IN_SLOW(MABMAJ) &DISCRETE_IN(MABMIDI) &DISCRETE_OUT(MABMIDO)

Lights front: A TRUE value indicates that the front lights are to be turned on. Lights rear relay feedback: A TRUE value indicates that the relay is in the closed position. Lights rear high: A TRUE value indicates that the rear lights are to be turned on full.. Lead Truck Sand Switch: A TRUE value indicates an operator request for sanding of the lead truck only. Lead Truck Sand Magnet Valve: A value of TRUE opens the valve causing sanding of the lead truck. Lead Truck Sand Switch In No. 1 Cab For Two Cab Locomotives. First Used On JT42C Basic. Lead Truck Sand Switch In No. 2 Cab For Two Cab Locomotives. First Used On JT42C Basic. Load Test Contactors: A value of TRUE causes both LTT1 and LTT2 to close. Load Test Contactor #1 Feedback: A TRUE value indicates the contactor is closed. Load Test Contactor #2 Feedback: A TRUE value indicates the contactor is closed. Linking Valve Closed: A TRUE value indicates that the cooling system linking (a.k.a. diverter) valve is in the fully closed position. This signal originates from a limit switch within the linking valve assembly. Linking Valve Open: A TRUE value indicates that the cooling system linking (a.k.a. diverter) valve is in the fully open position. This signal originates from a limit switch within the linking valve assembly. Layover Water Circulation Pump Circuit Breaker feedback - a TRUE value indicates that the circuit breaker for the layover water circulation pump is CLOSED. "Low Water Level" input from expansion tank float switch. low_pwr_flg - &tcc_low_power_flag[0] med_an_inmap - &medium_analog_input_map m_ana_out_m - &medium_analog_output_map hi_tm_a - &high_tm_current_medium Microprocessor Air Brake Circuit Breaker feedback The number received should be one higher than the value sent to the MABS the previous loop. A time delay must be instituted to allow the MABS to respond. Busy Check: MABS will add one to this signal and then send it back on a serial input. LCC should increase this number and then repeat the process. Failure of MABS to respond properly indicates a failed communications link. TL 21T signal over serial link (Dynamic Brake On Indication) Vehicle Speed signal sent to the MABS. Micro Air Brake Software Major Revision The MID of the MABS packet received. The MID of the packet sent to MABS.


MABMin MABRev MB Brk<

&ANA_IN_SLOW(MABMIN) &DISCRETE_OUT(MABREV) &SIG_IO_STATE(MB_BRK)

MB Brk>

&SIG_IO_STATE(MB_BRK)

MB Pwr<

&SIG_IO_STATE(MB_PWR)

MB Pwr>

&SIG_IO_STATE(MB_PWR)

Mb_St MDACCB<

&mb_state &SIG_IO_STATE(MDACCB)

Mem_bnk MemPres MG A MG CT A

&memory_bank &mem_present &mg_a_slow &ANA_IN_SLOW(MG_CT_A)

MG CTA1

&ANA_IN_SLOW(MG_CTA1)

MG CTA2

&ANA_IN_SLOW(MG_CTA2)

MG Stat MG Stat MG V MG V MG_Err Mg_I_F MG_V_F Mg_V_Rf MGA Max MGF_A_F MGFA Rf MGFA Rf MgFdIEr MgFdIMn

®ulation_status ®ulation_status &ANA_IN_SLOW(MG_V) &mg_v_slow &generator_error &mg_a_fast &analog_io.MG_V.fast.value &main_gen_voltage_ref &main_generator_current_limit &analog_io.MGFLD_A.fast.value &mg_fld_current_desired &mg_fld_current_desired &mg_fld_current_error &mg_fld_current_minimum

Micro Air Brake Software Minor Revision Reverser handle position of local locomotive Motor Brake Switch-gear Brake Position Feedback: A value of TRUE indicates the Motor Brake Switch-gear is in the brake position. Motor Brake Switch-gear, Brake Position: A value of TRUE causes the switch-gear to rotate toward the brake position. Motor Brake Switch-gear Power Feedback: A value of TRUE indicates the Motor Brake switchgear is in the power position. Motor Brake Switch-gear, Power Position: A value of TRUE causes the switch-gear to rotate toward the power position. mb_state - &mb_state Motor Driven Air Compressor Circuit Breaker Feedback - a TRUE value indicates that the circuit breaker for MDAC motor is CLOSED. memory_bank - memory_bank mem_present - &mem_present Main generator current feedback calculated. AR20/AR11 Generator Current: This is the current being produced by the main generator as measured through CTs. TA22 Current: The current being produced by the main generator as measured through the #1 (integral?) CT. TA22 Current: The current being produced by the main generator as measured through the #2 (integral?) CT. Filtered Regulation Status - set to mimmic the MOD3 Regstat meter signal Filtered Regulation Status - set to mimmic the MOD3 Regstat meter signal Main Generator Voltage Main generator voltage feedback calculated. mg_error - &generator_error mg_a_fast - &mg_a_fast MG_V_F - &analog_io.MG_V.fast.value mg_v_ref - &main_gen_voltage_ref Main generator current reference. MGFLD_A_FST - &analog_io.MGFLD_A.fast.value Main generator field current reference. Main generator field current reference. mgfld_i_err - &mg_fld_current_error mgfld_cur_min - &mg_fld_current_minimum SIGNAL DESCRIPTIONS B-59

MGFdrDe MGFld A MGFld A MgFldLm MGFV Rf MGGC< MGGC> MGI_Err MGV Lmt MGV Max MGV Raw MGV Ref MgV_Err MgV_Fst MID I MID O MIDVerI

&gen_mg_fld_current_desired &ANA_IN_SLOW(MGFLD_A) &ANA_IN_SLOW(MGFLD_A) &mg_fld_current_limit &mg_fld_voltage_desired &SIG_IO_STATE(MGGC) &SIG_IO_STATE(MGGC) ¤t_error &vmgref &main_generator_voltage_limit &ANA_IN_SLOW(REAL_MG_V) &vmgref &voltage_error &mg_v_fast &DISCRETE_IN(MID_I) &DISCRETE_OUT(MID_O) &DISCRETE_IN(MIDVERI)

MIDVerO

&DISCRETE_OUT(MIDVERO)

MmbPres MMTime Mn_CRpm Mn_CSpd MnEgSp

&mmb_present &mm_time &min_calc_motor_rpm &min_calculated_loco_spd &ANA_IN_SLOW(MNEGSP)

MnEgSpd MnEgSpP

&final_min_engine_speed &DISCRETE_IN(MNEGSPP)

MnEgSpR

&DISCRETE_IN(MNEGSPR)

MnPrLM MnS Sw< Mode D< Mode E< MoveSt

&minimum_power_limit &SIG_IO_STATE(MNS_SW) &SIG_IO_STATE(MODE_D) &SIG_IO_STATE(MODE_E) &movement_state

gen_mgfld_cur - &gen_mg_fld_current_desired Fast Main Generator Field Current - AC units - utilizing the Fast Loop . DC System : Main Generator Field Current. mg_fld_lim - &mg_fld_current_limit The main generator field voltage reference. Main Generator Ground Connection Main Generator Ground Connection, used on DM Locomotives. mgi_error - ¤t_error Main generator voltage limit. Main generator voltage controller reference. The raw main generator voltage Main generator voltage reference. mgv_error - &voltage_error mg_v_fast - &mg_v_fast The MID of the EMDEC packet received. The MID of the packet sent to EMDEC. The MID version of the data packet received from EMDEC. This is used to identify the version of the data packet. The MID version of the data packet sent to EMDEC. This is used to identify the version of the data packet. mmb_present - &mmb_present Time stamp for the snapshot of the motor management data. min_calc_rpm - &min_calc_motor_rpm min_calc_spd - &min_calculated_loco_spd The minimum engine speed that EMDEC would like to operate at. This allows EMDEC to requests engine speed ups. min_eng_spd - &min_engine_speed The priority for the maximum engine speed requested by EMDEC. (0 = Lowest, 15= Highest). 15 indicates a mandatory speed up. The reason for the minimum engine speed requested by EMDEC. A value of 0 is sent when there is no minimum engine speed request. MIN_POWER_LM - &minimum_power_limit Manual Sand Switch : A value of TRUE indicates an operator request for sanding. Diesel Mode Trainline Input Electric Mode Trainline Input movement_st - &movement_state SIGNAL DESCRIPTIONS B-60

MR Pres MRPS<

&ANA_IN_SLOW(MR_PRES) &SIG_IO_STATE(MRPS)

MS TmpF MSLimit MSpRPM MTC MOT MtrsAvl MUBNtF<

&motor_temperature &mts_power_limit &max_slipped_pinion_rpm &minimum_mtc_motor_num &number_motors_available &SIG_IO_STATE(MUBNTF)

MUBNtF>

&SIG_IO_STATE(MUBNTF)

MuxChan MV BPV>

&select_group &SIG_IO_STATE(MV_BPV)

MV SH>

&SIG_IO_STATE(MV_SH)

MV STC>

&SIG_IO_STATE(MV_STC)

MVAlt> MVASAc>

&SIG_IO_STATE(MVALT) &SIG_IO_STATE(MVASAC)

MVASEn>

&SIG_IO_STATE(MVASEN)

MVBB>

&SIG_IO_STATE(MVBB)

MVBell> MVC>

&SIG_IO_STATE(MVBELL) &SIG_IO_STATE(MVC)

MVCC>

&SIG_IO_STATE(MVCC)

Mvccdly MVCCLU>

&mvcc_delay_time &SIG_IO_STATE(MVCCLU)

Main Reservoir Pressure Feedback (0 to 200 PSI xdcr) Main Reservoir Pressure Switch. A value of TRUE indicates that the main reservoir air pressure is below a predetermined level. A value of FALSE indicates that there is sufficient air in the main reservoir supply. Calculated motor temperature. MS limit Maximum calculated rpm during slipped pinion detection. Minimum MTC motor number Number of traction motors available for traction operation. MU B Not F - Feedback from the MUBNtF relay - A TRUE value indicates that locomotive is set up for HEP operation with an MU connection at the B-End Only. [1st Used - LIRR DE30AC] MU B (end) Not F (end) Relay: A TRUE values causes the MUBNtF relay coil to pickup, which sets up the HEP trainline complete circuit for being coupled at the B End Only. mux_channel - &select_group Phase 2 Cooling Sys ByPass Valve - On/Off magnetic valve for the Glycol-using separate aftercooling system. Cooling Fan Shutters driven by a single DIO channel. The output can be used to drive a single solenoid valve, or two solenoid valves (i.e., MV SHI and MV SHO). Magnet Valve STart Control: Phase 2 Air Start. When this & STE are TRUE, air is admitted to the air start motors to both engage bendixes and spin starters. Alerter Magnet Value: A TRUE value causes the magnet valve to open. Magnet Valve Air Start Actuate: Hybrid Electric/Air Start. When this & STE are TRUE, air is admitted to the air start motors after MVACEn extends the starter bendixes. Magnet Valve Air Start Engage: Hybrid Electric/Air Start. When this & STE are TRUE, air is admitted to extend the starter bendixes. Blended Brake Magnet Valve: A value of FALSE sets up the brake cylinder air system so that is can be controlled using the MVC and MVR outputs. Output for driving magnetic. valve for pneumatic loco. bell. Charge Magnet Valve: A value of FALSE causes the blended brake change magnet valve to open and increase the brake cylinder pressure. Magnet Valve Compressor Control: A value of FALSE causes the locomotive's compressor to pump air. mvcc_delay - &mvcc_delay_time Magnet Valve Compressor Clutch: A value of TRUE causes the air compressor clutch to be disengaged from the driving device. SHOULD BE MVCLU NOT 'CC' HOW DO CAN THIS BE CORRECTED W/O MESSING ORDER UP


MVDrV>

&SIG_IO_STATE(MVDRV)

MVHorn>

&SIG_IO_STATE(MVHORN)

MVHrn1>

&SIG_IO_STATE(MVHRN1)

MVHrn2>

&SIG_IO_STATE(MVHRN2)

MVOS>

&SIG_IO_STATE(MVOS)

MVR>

&SIG_IO_STATE(MVR)

MVS 1>

&SIG_IO_STATE(MVS_1)

MVS 1F>

&SIG_IO_STATE(MVS_1F)

MVS 1R>

&SIG_IO_STATE(MVS_1R)

MVS 2>

&SIG_IO_STATE(MVS_2)

MVS 2F>

&SIG_IO_STATE(MVS_2F)

MVS 2R>

&SIG_IO_STATE(MVS_2R)

MVSB>

&SIG_IO_STATE(MVSB)

MVSDIR>

&SIG_IO_STATE(MVSDIR)

MxC_Rpm MxC_Spd MxEgSp

&max_calc_motor_rpm &max_calculated_loco_spd &ANA_IN_SLOW(MXEGSP)

Magnet Valve Drain Valve: LCC-controlled MV for the dedicated 3rd Reservoir for AirStart systems. Horn Magnetic Valve: A value of TRUE opens the horn magnetic valve which causes the horn to sound. Horn #1 Magnetic Valve: A value of TRUE opens the horn magnetic valve controlling the #1 Horn which causes the horn to sound. [1st Used - LIRR DE30AC : Dual Horn Output Control] Horn #2 Magnetic Valve: A value of TRUE opens the horn magnetic valve controlling the #2 Horn which causes the horn to sound. [1st Used - LIRR DE30AC : Dual Horn Output Control] Locomotive Overspeed Magnet Valve: A value of FALSE will cause the magnet to drop out and consequently the air brakes are dumped to apply emergency air. Release Magnet Valve: A value of FALSE causes the blended brake release magnet valve to open, causing the brake cylinder to vent air to the atmosphere.. Truck #1 Sanding Magnet Valve: A value of TRUE causes the valve to open and the sanders of truck #1 to be activated. Truck #1 Forward Sanding Magnet Valve: A value of TRUE causes the valve to open and the forward sanders of truck #1 to be activated. This is 1 of 4 outputs to be used with EM2000 Internal Directional Sanding. Truck #1 Reverse Sanding Magnet Valve: A value of TRUE causes the valve to open and the reverse sanders of truck #1 to be activated. This is 1 of 4 outputs to be used with EM2000 Internal Directional Sanding. Truck #2 Sanding Magnet Valve: A value of TRUE causes the valve to open and the sanders of truck #2 to be activated. Truck #2 Forward Sanding Magnet Valve: A value of TRUE causes the valve to open and the forward sanders of truck #2 to be activated. This is 1 of 4 outputs to be used with EM2000 Internal Directional Sanding. Truck #2 Reverse Sanding Magnet Valve: A value of TRUE causes the valve to open and the reverse sanders of truck #2 to be activated. This is 1 of 4 outputs to be used with EM2000 Internal Directional Sanding. Sand Blower Magnet Valve: A TRUE value causes the magnet value to open and the blower to activate. Truck #1&2 DIRectionr relay output: A value of TRUE causes the Reverse Sand Relay (RER) to be turned on so that sanding in the reverse direction is enabled. This is 1 of 3 outputs to be used with EM2000 Relay-Controlled Directional Sanding. max_calc_rpm - &max_calc_motor_rpm max_calc_spd - &max_calculated_loco_spd The maximum engine speed that EMDEC would like to operate at. This allows EMDEC to requests engine speed limits. The speed request priority will define if the speed limit is mandatory. SIGNAL DESCRIPTIONS B-62

MxEgSpd MxEgSpP MxEgSpR MxOf01<

MxOf02<

MxOf03<

MxOf04<

MxOf05<

MxOf06<

MxOf07<

MxOf08<

MxOf09<

MxOf10<

&final_requested_max_engine_sp max_eng_spd - &max_engine_speed eed &DISCRETE_IN(MXEGSPP) The priority for the maximum engine speed requested by EMDEC. (0 = Lowest, 15= Highest). 15 indicates a mandatory speed limit. &DISCRETE_IN(MXEGSPR) The reason for the maximum engine speed requested by EMDEC. A value of 0 is sent when there is no maximum speed request. &SIG_IO_STATE(MXOF01) Multiplexer Off 1 (DIO 1, Channel 1 ): A value of TRUE indicates that no voltage drop was across the DIO input although all multiplexer outputs were turned off. A value of FALSE is nominal. A value of TRUE indicates a failure. &SIG_IO_STATE(MXOF02) Multiplexer Off 2 (DIO 1, Channel 2 ): A value of TRUE indicates that no voltage drop was across the DIO input although all multiplexer outputs were turned off. A value of FALSE is nominal. A value of TRUE indicates a failure. &SIG_IO_STATE(MXOF03) Multiplexer Off 3 (DIO 1, Channel 3 ): A value of TRUE indicates that no voltage drop was across the DIO input although all multiplexer outputs were turned off. A value of FALSE is nominal. A value of TRUE indicates a failure. &SIG_IO_STATE(MXOF04) Multiplexer Off 4 (DIO 1, Channel 4 ): A value of TRUE indicates that no voltage drop was across the DIO input although all multiplexer outputs were turned off. A value of FALSE is nominal. A value of TRUE indicates a failure. &SIG_IO_STATE(MXOF05) Multiplexer Off 5 (DIO 1, Channel 5 ): A value of TRUE indicates that no voltage drop was across the DIO input although all multiplexer outputs were turned off. A value of FALSE is nominal. A value of TRUE indicates a failure. &SIG_IO_STATE(MXOF06) Multiplexer Off 6 (DIO 1, Channel 6 ): A value of TRUE indicates that no voltage drop was across the DIO input although all multiplexer outputs were turned off. A value of FALSE is nominal. A value of TRUE indicates a failure. &SIG_IO_STATE(MXOF07) Multiplexer Off 7 (DIO 1, Channel 7 ): A value of TRUE indicates that no voltage drop was across the DIO input although all multiplexer outputs were turned off. A value of FALSE is nominal. A value of TRUE indicates a failure. &SIG_IO_STATE(MXOF08) Multiplexer Off 8 (DIO 1, Channel 8 ): A value of TRUE indicates that no voltage drop was across the DIO input although all multiplexer outputs were turned off. A value of FALSE is nominal. A value of TRUE indicates a failure. &SIG_IO_STATE(MXOF09) Multiplexer Off 9 (DIO 2, Channel 1 ): A value of TRUE indicates that no voltage drop was across the DIO input although all multiplexer outputs were turned off. A value of FALSE is nominal. A value of TRUE indicates a failure. &SIG_IO_STATE(MXOF10) Multiplexer Off 10 (DIO 2, Channel 2 ): A value of TRUE indicates that no voltage drop was across the DIO input although all multiplexer outputs were turned off. A value of FALSE is nominal. A value of TRUE indicates a failure.


MxOf11<

&SIG_IO_STATE(MXOF11)

MxOf12<


MxOf13<


MxOf14<


MxOf15<


MxOf16<


MxOf17<


MxOf18<


MxOf19<


MxOf20<


MxOf21<


MxOf22<


MxOf23<


Multiplexer Off 11 (DIO 2, Channel 3 ): A value of TRUE indicates that no voltage drop was across the DIO input although all multiplexer outputs were turned off. A value of FALSE is nominal. A value of TRUE indicates a failure. Multiplexer Off 12 (DIO 2, Channel 4 ): A value of TRUE indicates that no voltage drop was across the DIO input although all multiplexer outputs were turned off. A value of FALSE is nominal. A value of TRUE indicates a failure. Multiplexer Off 13 (DIO 2, Channel 5 ): A value of TRUE indicates that no voltage drop was across the DIO input although all multiplexer outputs were turned off. A value of FALSE is nominal. A value of TRUE indicates a failure. Multiplexer Off 14 (DIO 2, Channel 6 ): A value of TRUE indicates that no voltage drop was across the DIO input although all multiplexer outputs were turned off. A value of FALSE is nominal. A value of TRUE indicates a failure. Multiplexer Off 15 (DIO 1, Channel 7 ): A value of TRUE indicates that no voltage drop was across the DIO input although all multiplexer outputs were turned off. A value of FALSE is nominal. A value of TRUE indicates a failure. Multiplexer Off 16 (DIO 2, Channel 8 ): A value of TRUE indicates that no voltage drop was across the DIO input although all multiplexer outputs were turned off. A value of FALSE is nominal. A value of TRUE indicates a failure. Multiplexer Off 17 (DIO 3, Channel 1 ): A value of TRUE indicates that no voltage drop was across the DIO input although all multiplexer outputs were turned off. A value of FALSE is nominal. A value of TRUE indicates a failure. Multiplexer Off 18 (DIO 3, Channel 2 ): A value of TRUE indicates that no voltage drop was across the DIO input although all multiplexer outputs were turned off. A value of FALSE is nominal. A value of TRUE indicates a failure. Multiplexer Off 19 (DIO 3, Channel 3 ): A value of TRUE indicates that no voltage drop was across the DIO input although all multiplexer outputs were turned off. A value of FALSE is nominal. A value of TRUE indicates a failure. Multiplexer Off 20 (DIO 3, Channel 4): A value of TRUE indicates that no voltage drop was across the DIO input although all multiplexer outputs were turned off. A value of FALSE is nominal. A value of TRUE indicates a failure. Multiplexer Off 21 (DIO 3, Channel 5): A value of TRUE indicates that no voltage drop was across the DIO input although all multiplexer outputs were turned off. A value of FALSE is nominal. A value of TRUE indicates a failure. Multiplexer Off 22 (DIO 3, Channel 6): A value of TRUE indicates that no voltage drop was across the DIO input although all multiplexer outputs were turned off. A value of FALSE is nominal. A value of TRUE indicates a failure. Multiplexer Off 23 (DIO 3, Channel 7): A value of TRUE indicates that no voltage drop was across the DIO input although all multiplexer outputs were turned off. A value of FALSE is nominal. A value of TRUE indicates a failure. SIGNAL DESCRIPTIONS B-64

MxOf24<


MxOf25<


MxOf26<


MxOf27<


MxOf28<


MxOf29<


MxOf30<


MxOf31<


MxOf32<


MxOn01<

&SIG_IO_STATE(MXON01)

MxOn02<


MxOn03<


MxOn04<


MxOn05<


Multiplexer Off 24 (DIO 3, Channel 8): A value of TRUE indicates that no voltage drop was across the DIO input although all multiplexer outputs were turned off. A value of FALSE is nominal. A value of TRUE indicates a failure. Multiplexer Off 25 (DIO 4, Channel 1): A value of TRUE indicates that no voltage drop was across the DIO input although all multiplexer outputs were turned off. A value of FALSE is nominal. A value of TRUE indicates a failure. Multiplexer Off 26 (DIO 4, Channel 2 ): A value of TRUE indicates that no voltage drop was across the DIO input although all multiplexer outputs were turned off. A value of FALSE is nominal. A value of TRUE indicates a failure. Multiplexer Off 27 (DIO 4, Channel 3 ): A value of TRUE indicates that no voltage drop was across the DIO input although all multiplexer outputs were turned off. A value of FALSE is nominal. A value of TRUE indicates a failure. Multiplexer Off 28 (DIO 4, Channel 4 ): A value of TRUE indicates that no voltage drop was across the DIO input although all multiplexer outputs were turned off. A value of FALSE is nominal. A value of TRUE indicates a failure. Multiplexer Off 29 (DIO 4, Channel 5 ): A value of TRUE indicates that no voltage drop was across the DIO input although all multiplexer outputs were turned off. A value of FALSE is nominal. A value of TRUE indicates a failure. Multiplexer Off 30 (DIO 4, Channel 6 ): A value of TRUE indicates that no voltage drop was across the DIO input although all multiplexer outputs were turned off. A value of FALSE is nominal. A value of TRUE indicates a failure. Multiplexer Off 31 (DIO 4, Channel 7 ): A value of TRUE indicates that no voltage drop was across the DIO input although all multiplexer outputs were turned off. A value of FALSE is nominal. A value of TRUE indicates a failure. Multiplexer Off 32 (DIO 4, Channel 8 ): A value of TRUE indicates that no voltage drop was across the DIO input although all multiplexer outputs were turned off. A value of FALSE is nominal. A value of TRUE indicates a failure. Multiplexer On 1 (DIO 1, Channel 1 ): A value of TRUE indicates that no voltage drop was across the DIO input. This is expected because the circuit is wired to provide a closed path. Multiplexer On 2 (DIO 1, Channel 2 ): A value of TRUE indicates that no voltage drop was across the DIO input. This is expected because the circuit is wired to provide a closed path. Multiplexer On 3 (DIO 1, Channel 3 ): A value of TRUE indicates that no voltage drop was across the DIO input. This is expected because the circuit is wired to provide a closed path. Multiplexer On 4 (DIO 1, Channel 4 ): A value of TRUE indicates that no voltage drop was across the DIO input. This is expected because the circuit is wired to provide a closed path. Multiplexer On 5 (DIO 1, Channel 5 ): A value of TRUE indicates that no voltage drop was across the DIO input. This is expected because the circuit is wired to provide a closed path.


MxOn06<


MxOn07<


MxOn08<


MxOn09<


MxOn10<


MxOn11<


MxOn12<


MxOn13<


MxOn14<


MxOn15<


MxOn16<


MxOn17<


MxOn18<


MxOn19<


MxOn20<


MxOn21<


MxOn22<


MxOn23<


MxOn24<


Multiplexer On 6 (DIO 1, Channel 6 ): A value of TRUE indicates that no voltage drop was across the DIO input. This is expected because the circuit is wired to provide a closed path. Multiplexer On 7 (DIO 1, Channel 7 ): A value of TRUE indicates that no voltage drop was across the DIO input. This is expected because the circuit is wired to provide a closed path. Multiplexer On 8 (DIO 1, Channel 8 ): A value of TRUE indicates that no voltage drop was across the DIO input. This is expected because the circuit is wired to provide a closed path. Multiplexer On 9 (DIO 2, Channel 1 ): A value of TRUE indicates that no voltage drop was across the DIO input. This is expected because the circuit is wired to provide a closed path. Multiplexer On 10 (DIO 2, Channel 2 ): A value of TRUE indicates that no voltage drop was across the DIO input. This is expected because the circuit is wired to provide a closed path. Multiplexer On 11 (DIO 2, Channel 3 ): A value of TRUE indicates that no voltage drop was across the DIO input. This is expected because the circuit is wired to provide a closed path. Multiplexer On 12 (DIO 2, Channel 4 ): A value of TRUE indicates that no voltage drop was across the DIO input. This is expected because the circuit is wired to provide a closed path. Multiplexer On 13 (DIO 2, Channel 5 ): A value of TRUE indicates that no voltage drop was across the DIO input. This is expected because the circuit is wired to provide a closed path. Multiplexer On 14 (DIO 2, Channel 6 ): A value of TRUE indicates that no voltage drop was across the DIO input. This is expected because the circuit is wired to provide a closed path. Multiplexer On 15 (DIO 2, Channel 7 ): A value of TRUE indicates that no voltage drop was across the DIO input. This is expected because the circuit is wired to provide a closed path. Multiplexer On 16 (DIO 2 Channel 8 ): A value of TRUE indicates that no voltage drop was across the DIO input. This is expected because the circuit is wired to provide a closed path. Multiplexer On 17 (DIO 3, Channel 1 ): A value of TRUE indicates that no voltage drop was across the DIO input. This is expected because the circuit is wired to provide a closed path. Multiplexer On 18 (DIO 3, Channel 2 ): A value of TRUE indicates that no voltage drop was across the DIO input. This is expected because the circuit is wired to provide a closed path. Multiplexer On 19 (DIO 3, Channel 3 ): A value of TRUE indicates that no voltage drop was across the DIO input. This is expected because the circuit is wired to provide a closed path. Multiplexer On20 (DIO 3, Channel 4): A value of TRUE indicates that no voltage drop was across the DIO input. This is expected because the circuit is wired to provide a closed path. Multiplexer On21 (DIO 3, Channel 5): A value of TRUE indicates that no voltage drop was across the DIO input. This is expected because the circuit is wired to provide a closed path. Multiplexer On22 (DIO 3, Channel 6): A value of TRUE indicates that no voltage drop was across the DIO input. This is expected because the circuit is wired to provide a closed path. Multiplexer On23 (DIO 3, Channel 7): A value of TRUE indicates that no voltage drop was across the DIO input. This is expected because the circuit is wired to provide a closed path. Multiplexer On24 (DIO 3, Channel 8): A value of TRUE indicates that no voltage drop was across the DIO input. This is expected because the circuit is wired to provide a closed path. SIGNAL DESCRIPTIONS B-66

MxOn25<


MxOn26<


MxOn27<


MxOn28<


MxOn29<


MxOn30<


MxOn31<


MxOn32<


MxSel1<

&SIG_IO_STATE(MXSEL1)

MxSel2<


MxSel3<


MxSel4<


MxSel5<


N + dN NCPTST<

&n_plus_delta_n &SIG_IO_STATE(NCPTST)

NCSA<

&SIG_IO_STATE(NCSA)

NCSA>

&SIG_IO_STATE(NCSA)

NCSB<

&SIG_IO_STATE(NCSB)

Multiplexer On25 (DIO 4, Channel 1): A value of TRUE indicates that no voltage drop was across the DIO input. This is expected because the circuit is wired to provide a closed path. Multiplexer On26 (DIO 4, Channel 2): A value of TRUE indicates that no voltage drop was across the DIO input. This is expected because the circuit is wired to provide a closed path. Multiplexer On27 (DIO 4, Channel 3): A value of TRUE indicates that no voltage drop was across the DIO input. This is expected because the circuit is wired to provide a closed path. Multiplexer On28 (DIO 4, Channel 4): A value of TRUE indicates that no voltage drop was across the DIO input. This is expected because the circuit is wired to provide a closed path. Multiplexer On29 (DIO 4, Channel 5): A value of TRUE indicates that no voltage drop was across the DIO input. This is expected because the circuit is wired to provide a closed path. Multiplexer On30 (DIO 4, Channel 6): A value of TRUE indicates that no voltage drop was across the DIO input. This is expected because the circuit is wired to provide a closed path. Multiplexer On31 (DIO 4, Channel 7): A value of TRUE indicates that no voltage drop was across the DIO input. This is expected because the circuit is wired to provide a closed path. Multiplexer On32 (DIO 4, Channel 8): A value of TRUE indicates that no voltage drop was across the DIO input. This is expected because the circuit is wired to provide a closed path. Multiplexer Output Channel 1 Feedback: A TRUE value indicates that the Multiplexer output channel 1 was on the last time it was requested to be on. Multiplexer Output Channel 2 Feedback: A TRUE value indicates that the Multiplexer output channel 2 was on the last time it was requested to be on. Multiplexer Output Channel 3 Feedback: A TRUE value indicates that the Multiplexer output channel 3 was on the last time it was requested to be on. Multiplexer Output Channel 4 Feedback: A TRUE value indicates that the Multiplexer output channel 4 was on the last time it was requested to be on. Multiplexer Output Channel 5 Feedback: A TRUE value indicates that the Multiplexer output channel 5 was on the last time it was requested to be on. N + delta N No air ComPressor TeST: A TRUE value indicates there is not air compressor test request. Used in OIL_SAMPLE_TEST_ EDL. Relay NCSA is for Not Cab Station A and would be energized when cab station A is inactive to 74v to the EPIC CCC. The relay is de-energized when cab station A is to be active and there is no input to the EPIC CCC at CC4-C and CC4-D Relay NCSA is for Not Cab Station A and would be energized when cab station A is inactive to input 74v to the EPIC CCC. The relay is de-energized when cab station A is to be active and there is no input to the EPIC CCC at CC4-C and CC4-D Relay NCSB is for Not Cab Station B and would be energized when cab station B is inactive to 74v to the EPIC CCC. The relay is de-energized when cab station B is to be active and there is no input to the EPIC CCC at CC4-A and CC4-B SIGNAL DESCRIPTIONS B-67

NCSB>

&SIG_IO_STATE(NCSB)

NEmgSd<

&SIG_IO_STATE(NEMGSD)

NEW No AR<

&ANA_IN_SLOW(NEW) &SIG_IO_STATE(NO_AR)

No AR>

&SIG_IO_STATE(NO_AR)

No EPS<

&SIG_IO_STATE(NO_EPS)

No IPS<

&SIG_IO_STATE(NO_IPS)

NO_ASR<

&SIG_IO_STATE(NO_ASR)

NoBtCg< NoEFCO<

&SIG_IO_STATE(NOBTCG) &SIG_IO_STATE(NOEFCO)

NoLoco<

&SIG_IO_STATE(NOLOCO)

NoLWL<

&SIG_IO_STATE(NOLWL)

Nor HE<

&SIG_IO_STATE(NOR_HE)

NorReq< NoSand>

&SIG_IO_STATE(NORREQ) &SIG_IO_STATE(NOSAND)

NoTMCO<

&SIG_IO_STATE(NOTMCO)

NZSpd<

&SIG_IO_STATE(NZSPD)

NZSpd>

&SIG_IO_STATE(NZSPD)

Op Mode

&op_mode

Relay NCSB is for Not Cab Station B and would be energized when cab station B is inactive to input 74v to the EPIC CCC. The relay is de-energized when cab station B is to be active and there is no input to the EPIC CCC at CC4-A and CC4-B No Emergency Sanding request: A TRUE value indicates that there is no request for emergency sanding from any cab. First used on EW&S JT42CWR. Not Used NO Alarm Relay: (feedback) true condition indicates that the AR relay is NOT active and the 2T is NOT energized NO Alarm Relay: A TRUE output indicates that the AR relay is NOT active and that 2T is NOT energized. No Emergency Brake Pressure: A TRUE value indicates that the locomotive is NOT in emergency brake. No Independent Brake Pressure Switch: Used to determine if the independent air brakes have been applied. A value of TRUE indicates little or no independent air brake pressure has been applied. A value of FALSE indicates there is an air brake application A signal sent by the ATC system to indicate that a automatic service brake request would be made (by the air brake system), based on a speed restriction violation. First used on LIRR DE30 for traction inhibit. No Battery Charge: A TRUE value indicates that the battery changed is not on. No Emergency Fuel Cutoff: A value of TRUE indicates there is NOT an emergency fuel cutoff request. No Locomotive Detected - a FALSE value indicates that a locomotive has been detected as being electrically coupled to the local unit. This input is fed by a NC interlock of the LocoD (Locomotive Detect) relay, which is energized when a locomotive is dete No Low Water Level (NoLWL) signal from float switch in expansion tank. The switch wiring is fail open, and the normal (operating) state is closed, or HIGH. Hormal HEP: A TRUE value indicates that head end power is in the normal operating mode [using HEP alternator]. Normal HEP Request: A TRUE value indicates that the operator has requested normal HEP. This output will be turned on when none of the sanding magnet valves are turned on. This output is used to drive the event recorder. No Traction Motors Cutout: A value of TRUE indicates that none of the traction motors have been cutout. Non-Zero Speed Relay Feedback: A TRUE value indicates that the relay is in the closed position. Non-Zero Speed: A TRUE value indicates that the locomotive is moving at a speed greater than some specified value (used to signal Micro Air to stop Emergency Sanding). Status variable containing the current operation mode of the locomotive. SIGNAL DESCRIPTIONS B-68

OpBkReq OPDpLbP OPDpRbP OPEgIPS OPEgIPS OPFltDp OPFltDp OPFltIP OPFltIP Opmd St OpPrReq OpTMCkt OPTuLPS OPTuRPS ORS>

&operator_brake_request &ANA_IN_SLOW(OPDPLB) &ANA_IN_SLOW(OPDPRB) &ANA_IN_SLOW(OPEGI) &ANA_IN_SLOW(OPEGI) &ANA_IN_SLOW(OPFLTDP) &ANA_IN_SLOW(OPFLTDP) &ANA_IN_SLOW(OPFLTI) &ANA_IN_SLOW(OPFLTI) &op_mode_status &operator_power_request &open_motor_ckt &ANA_IN_SLOW(OPTUL) &ANA_IN_SLOW(OPTUR) &SIG_IO_STATE(ORS)

OTEgIF output P_fld P_Pr P1< P1> P2< P2> P3< P3> P4< P4> P5< P5> P6< P6> P7< P7> P8<

&ANA_IN_SLOW(OTEGI) &ANA_OUT(OUTPUT) &P_field &P_power &SIG_IO_STATE(P1) &SIG_IO_STATE(P1) &SIG_IO_STATE(P2) &SIG_IO_STATE(P2) &SIG_IO_STATE(P3) &SIG_IO_STATE(P3) &SIG_IO_STATE(P4) &SIG_IO_STATE(P4) &SIG_IO_STATE(P5) &SIG_IO_STATE(P5) &SIG_IO_STATE(P6) &SIG_IO_STATE(P6) &SIG_IO_STATE(P7) &SIG_IO_STATE(P7) &SIG_IO_STATE(P8)

op_brk_req - &operator_brake_request Oil pressure drop across the left bank of the engine. Oil pressure drop across the right bank of the engine. Oil Pressure into the engine. Oil Pressure into the engine. Oil pressure drop across the engine oil filter. Oil pressure drop across the engine oil filter. Oil pressure into the engine oil filter. Oil pressure into the engine oil filter. Op mode status op_pwr_req - &operator_power_request open_mtr_ckt - &open_motor_ckt Oil Pressure into the left bank turbo charger. Oil Pressure into the right bank turbo charger. Governor Overriding Solenoid: A value of TRUE indicates the solenoid is activated. This causes the Load Regulator to move toward minimum field. Oil Temperature into the engine. Spare Output that is never used for bode plots. P_fld - &P_field P_power - &P_power P Contactor Feedback #1: A TRUE value indicates the P1 contactor is in the closed position. P1 Contactor: A value of TRUE causes the contactor to close. P Contactor Feedback #2: A TRUE value indicates the P2 contactor is in the closed position. P2 Contactor: A value of TRUE causes the contactor to close. P Contactor Feedback #3: A TRUE value indicates the P3 contactor is in the closed position. P3 Contactor: A value of TRUE causes the contactor to close. P Contactor Feedback #4: A TRUE value indicates the P4 contactor is in the closed position. P4 Contactor: A value of TRUE causes the contactor to close. P Contactor Feedback #5: A TRUE value indicates the P5 contactor is in the closed position. P5 Contactor: A value of TRUE causes the contactor to close. P Contactor Feedback #6: A TRUE value indicates the P6 contactor is in the closed position. P6 Contactor: A value of TRUE causes the contactor to close. P Contactor Feedback #7: A TRUE value indicates the P7 contactor is in the closed position. P7 Contactor: A value of TRUE causes the contactor to close. P Contactor Feedback #8: A TRUE value indicates the P8 contactor is in the closed position. SIGNAL DESCRIPTIONS B-69

P8> PBApld< PBAPLT> PBDC A PBkRel<

&SIG_IO_STATE(P8) &SIG_IO_STATE(PBAPLD) &SIG_IO_STATE(PBAPLT) &ANA_IN_SLOW(PBDC_A) &SIG_IO_STATE(PBKREL)

PBMTR A PBOvrd< PBPrSw< PBRLLT> PBRlsd< PBS<

&ANA_IN_SLOW(PBMTR_A) &SIG_IO_STATE(PBOVRD) &SIG_IO_STATE(PBPRSW) &SIG_IO_STATE(PBRLLT) &SIG_IO_STATE(PBRLSD) &SIG_IO_STATE(PBS)

Pc_St Pc_Stu PCR_PU>

&power_contactors_state &power_contactors_status &SIG_IO_STATE(PCR_PU)

PCS<

&SIG_IO_STATE(PCS)

PkB< Plc PLPR>

&SIG_IO_STATE(PKB) &percent_life_consumed &SIG_IO_STATE(PLPR)

Plug PMHtS1< PMHtS1>

&locomotive_is_plugging &SIG_IO_STATE(PMHTS1) &SIG_IO_STATE(PMHTS1)

PMHtS2< PMHtS2>

&SIG_IO_STATE(PMHTS2) &SIG_IO_STATE(PMHTS2)

Pnlt_Rq PPr_Lm Pr Loc<

&DISCRETE_OUT(PNLT_RQ) &protection_power_limit &SIG_IO_STATE(PR_LOC)

P8 Contactor: A value of TRUE causes the contactor to close. Parking Brake Applied: a value of TRUE indicates that the parking brake is fully applied. Parking Brake "Apply" Light (SD80/90MAC) Parking Brake Motor Current (DC locomotives). First used on EW&S JT42CWR. Parking Brake Released feedback: A TRUE value indicates that the feedback from the Parking Brake system indicates that the parking brake is in its full released position. First used on EW&S JT42CWR. PBMTR A - Parking Brake Motor Current (SD80/90MAC) Parking Brake Applied Traction Inhibit Override Parking Brake Pressure Switch - Feedback from the pressure switch. Parking Brake "Release" Light (SD80/90MAC) Parking Brake Released: A value of TRUE indicates that the parking brake is fully released. Park Brake Warning. A TRUE value indicates that on the application of the park brake, the pressure switch contacts change over and a signal is sent to ICE for display. FUO- GT46CWL pc_state - &power_contactors_state pc_status - &power_contactors_status Pneumatic Control Relay Pick Up: Electronic Throttle Controller- This output is set to TRUE to pick up the PCR when the ETC is IDLE. Pneumatic Control Switch: A value of TRUE indicates that an emergency brake or a penalty brake application has NOT been activated. Locomotive Parking Brake: A TRUE value indicates that the parking brake is on. plc - &percent_life_consumed Engine Prelube Relay: A TRUE value indicates that the relay is to close thus initiating engine prelube. plugging - &locomotive_is_plugging Phase Module Heater Source #1 - Feedback Phase Module Heater Source #1 - This output drives a contactor that connects the Phase Module Heaters to their #1 power source. [1st Used - LIRR DE30AC] Phase Module Heater Source #2 - Feedback Phase Module Heater Source #2 - This output drives a contactor that connects the Phase Module Heaters to their #2 power source. typically used when the #1 power source is not available. [1st Used - LIRR DE30AC] Request for penalty air brake application power_limit - &protection_power_limit Power Reduction Local: True value indicates that there is power reduction request and this is a lead unit.


Pr_Comp PR_Lead

PrevStp Prime< PrimeA< PrimeB< Primed<

&power_complete &format_actual_lead_unit_percent _load &format_display_desired_percent_ load &traction_power_reference &traction_power_reference_status &format_actual_trainline_percent_l oad &RUN_TOT_DATA(rt_data.lifetime _throt_record[0]) &previous_test_step &SIG_IO_STATE(PRIME) &SIG_IO_STATE(PRIMEA) &SIG_IO_STATE(PRIMEB) &SIG_IO_STATE(PRIMED)

ProMsg

&STR_DEVICE(PROMSG)

ProStat PRR< PRR>

&DISCRETE_OUT(PROSTAT) &SIG_IO_STATE(PRR) &SIG_IO_STATE(PRR)

Prr_Stu PSMode PSMoRq

&prr_status &power_source_mode &power_source_mode_request

PTCAPSI PTCBPSI PtoSdRq pwidth1 pwidth2 pwidth3

&ANA_IN_SLOW(PTCA) &ANA_IN_SLOW(PTCB) &ANA_IN_SLOW(PTOSDRQ) &ANA_IN_SLOW(PWIDTH[0]) &ANA_IN_SLOW(PWIDTH[1]) &ANA_IN_SLOW(PWIDTH)

PWR Lt>

&SIG_IO_STATE(PWR_LT)

PR_Req Pr_Rf Pr_RfSt PR_TL Pr8dat

power_complt - &power_complete The actual lead unit percent load. The desired percent load input from the user. pwr_ref - &power_reference pwr_ref_st - &power_reference_status The actual trainline percent load. pwr8_data - &RUN_TOT_DATA(rt_data.lifetime_throt_record[0]) prev_step - &previous_test_step A value of TRUE indicates that the Start/Prime switch is in the Prime position. Fuel Prime Switch Input - Cab 1 [TRUE requests prime] Fuel Prime Switch Input - Cab 2 [TRUE requests prime] When this signal is TRUE, the fuel pressure has been above its minimum protection limit at least once within the last minute, the fuel injection switch is in RUN, and the engine speed is below the minimum injection speed. These bytes present the displayed message for the health of the locomotive auxiliary system. Ref EDPS 400 5.5.3. This byte indicates the health of the locomotive protection system. Ref EDPS 400 5.5.10. Power Reduction Relay Feedback: A TRUE value indicates the relay is in the closed position. Power Reduction Relay: A TRUE value causes the 24T input to switch from dynamic brake rheostat to the power reduction device.. prr_status- Status of the PRR contactor - Power Reduction Relay. power_source_mode - Used to determine the Power Source Mode for Dual Mode locomotives. power_source_mode_request - Used to determine the Power Source Mode Request for Dual Mode locomotives. Blended brake call pressure "A". Brake cylinder pressure. EMDEC Requested Engine Speed. EMDEC injector pulse width from ECM #1, in degrees but unitless, NEVER displayed in radians EMDEC injector pulse width from ECM #2, in degrees but unitless, NEVER displayed in radians EMDEC injector pulse width from ECM #3, in degrees but unitless, NEVER displayed in radians Electronic Throttle Controller Power Mode Light output.


R Motor R_ANA_O R_catim R_day

RADAR

&motor_resistance &analog_output_buffer &CA_period_buffer &(((ICM_7170_TYPE *)(ICM_7170_BASE))>counter_day) &(((ICM_7170_TYPE *)(ICM_7170_BASE))>counter_hour) &ice_output_buffer &(((ICM_7170_TYPE *)(ICM_7170_BASE))>counter_minute) &(((ICM_7170_TYPE *)(ICM_7170_BASE))>counter_month) &put_SCR_delay_time_buffer &(((ICM_7170_TYPE *)(ICM_7170_BASE))>counter_second) &tcc_output_buffer &tcc_input_buffer[0] &timer_input_buffer &(((ICM_7170_TYPE *)(ICM_7170_BASE))>counter_year) &ANA_IN_SLOW(RADAR)

RadarMp RadBlw>

&ANA_IN_SLOW(RADAR) &SIG_IO_STATE(RADBLW)

RadTest Range 1 Range 2 Range 3 Range 4 Range 5

&ANA_OUT(RADTEST) &episode_temp_range_minute[0] &episode_temp_range_minute[1] &episode_temp_range_minute[2] &episode_temp_range_minute[3] &episode_temp_range_minute[4]

R_hr

R_Ic_Ot R_Mn

R_mon

R_ScrOt R_sec

R_T_Ot R_T1_In R_TimIn R_yr

Motor resistance (.000-.999) raw_anal_out - &analog_output_buffer raw_ca_time - &CA_period_buffer raw_day - &(((ICM_7170_TYPE *)(ICM_7170_BASE))->counter_day)

raw_hour - &(((ICM_7170_TYPE *)(ICM_7170_BASE))->counter_hour)

raw_ice_out - ice_output_buffer raw_min - &(((ICM_7170_TYPE *)(ICM_7170_BASE))->counter_minute)

raw_month - &(((ICM_7170_TYPE *)(ICM_7170_BASE))->counter_month)

raw_scr_out - &put_SCR_delay_time_buffer raw_sec - &(((ICM_7170_TYPE *)(ICM_7170_BASE))->counter_second)

raw_tcc_out - tcc_output_buffer raw_tcc1_in - tcc_input_buffer[0] raw_time_in - &timer_input_buffer raw_year - &(((ICM_7170_TYPE *)(ICM_7170_BASE))->counter_year)

160 teeth/rev, Locomotive Axle Speed. Uses the normal mode. Can be used on units without slow speed control. Locomotive speed based of radar unit. Traditional mounting - NOT turned toward the rail. Radar Air Blower Valve: A TRUE value energizes the radar air-blow valve which causes compressed air to blow across the radar's face plate. Activates the radar unit's self test function. Time bases episode temperature range. Time bases episode temperature range. Time bases episode temperature range. Time bases episode temperature range. Time bases episode temperature range. SIGNAL DESCRIPTIONS B-72

Range 6 Range 7 Range 8 Range 9 Range10 Range11 Range12 Range13 Range14 Range15 Range16 RATPrRf RatVLm Rc_Buf Rc_Cnt Rc_Max Rc_Prd Rc_Siz Rc_TCnd Rc_TPtr Rc_TTyp Rc_TVal Rcal R Rcal R1 Rcal R2 Rcal R3 Rcal R4 Rcal R5 Rcal R6 RcalMPH RcalRPM RCF1CB<

&episode_temp_range_minute[5] &episode_temp_range_minute[6] &episode_temp_range_minute[7] &episode_temp_range_minute[8] &episode_temp_range_minute[9] &episode_temp_range_minute[10] &episode_temp_range_minute[11] &episode_temp_range_minute[12] &episode_temp_range_minute[13] &episode_temp_range_minute[14] &episode_temp_range_minute[15] &rated_traction_power_desired &rated_voltage_limit &mmb_buf_ptr &entry_count &max_entries &cycle_count &number_of_elements &trigger_condition &trigger_ptr &trigger_type &trigger_value &radar_recalibration_ratio[0] &radar_recalibration_ratio[0] &radar_recalibration_ratio[1] &radar_recalibration_ratio[2] &radar_recalibration_ratio[3] &radar_recalibration_ratio[4] &radar_recalibration_ratio[5] &recal_radar_speed &recal_radar_rpm_motor[0] &SIG_IO_STATE(RCF1CB)

RCF2CB<

&SIG_IO_STATE(RCF2CB)

Time bases episode temperature range. Time bases episode temperature range. Time bases episode temperature range. Time bases episode temperature range. Time bases episode temperature range. Time bases episode temperature range. Time bases episode temperature range. Time bases episode temperature range. Time bases episode temperature range. Time bases episode temperature range. Time bases episode temperature range. RAT_POWER_RF - &rated_traction_power_desired rated_v_lim - &rated_voltage_limit Address of the recording buffer for the Recorder Function. Number of entries in the recorder's recording buffer. Number of entries in the recording buffer of the Recorder Function. Number of calls to skip between snapshots within the Recorder Function. Number of signals to record within the Recorder Function. Trigger Conditions for firing the trigger for the Recorder Function. Pointer to the control system variable used for the trigger in the Recorder function. Indicates the type of variable used by the trigger within the Recorder Function. The value of the control system variable which will fire the trigger in the Recorder Function. Re-calibration ratio for the radar. Re-calibration ration for the radar. Re-calibration ratio for the radar. Re-calibration ratio for the radar. Re-calibration ratio for the radar. Re-calibration ration for the radar. Re-calibration ratio for the radar. Recalibrated radar speed. The recalibrated motor RPM based on the radar. Radiator Cooling Fan #1 Circuit Breaker Feedback - a TRUE value indicates that the circuit breaker for the #1 radiator cooling fan is CLOSED. Radiator Cooling Fan #2 Circuit Breaker Feedback - a TRUE value indicates that the circuit breaker for the #2 radiator cooling fan is CLOSED. SIGNAL DESCRIPTIONS B-73

Rdr MPH Rdr1rpm Rdr2rpm RdrStFg RdrTst< RdrTst>

Rec_Ind Rec_ptr Rec_Rat Rec_tot Recalrt RecCnt RecEnty RecTrSp Regstat Regstat RExTLC< RExTLC> RHSw F< RHSw R< RL Noz> RL Pmp> RLIS< RLIS> RLNoz1>

&filtered_radar_speed &creep_control_rpm[0] &creep_control_rpm[1] &ANA_STATE_FLAG(RADAR) &SIG_IO_STATE(RDRTST)

Radar speed. Radar speed. Radar speed. Radar State Flag signal. Radar Test: A value of TRUE depicts the feedback from the RdrTst relay. It indicates that the relay has been energized & the interlock has closed to provide this feedback. &SIG_IO_STATE(RDRTST) Radar Test: A value of TRUE completes the feed to energize the RdrTst relay coil. This will in turn provide a 15V signal (via NO interlocks) to the radar transceiver to initiate the radar test circuit. &record_ind rec_ind - &record_ind &buf_ptr[0] rec_ptr - &buf_ptr[0] &radar_recalibration_ratio[0] recal_ratio - &radar_recalibration_ratio[0] &total_buf[0] rec_total - &total_buf[0] &PROT_DATA(radar_recalibration recal_rat - &PROT_DATA(radar_recalibration_ratio) _ratio) &entry_count rec_count - &entry_count &record_entry rec_entry - &record_entry &ANA_OUT(RECALIBRATED_TR Recalibrated Train Speed to ICE AIN_SPEED) &display_regulation_status Regulation Mode &display_regulation_status Regulation Mode &SIG_IO_STATE(REXTLC) Right External Trainline Complete - feedback from the RExTLC relay &SIG_IO_STATE(REXTLC) Right External Trainline Complete &SIG_IO_STATE(RHSW_F) Reverser Handle Forward Position: A TRUE value indicates that the consist operator has the reverser handle in the forward position. &SIG_IO_STATE(RHSW_R) Reverser Handle Reverse Position: A TRUE value indicates that the consist operator has the reverser handle in the reverse position. &SIG_IO_STATE(RL_NOZ) Rail Lube Nozzle magnet valve : A TRUE value activates the magnet valve to dispense lubricant on to the rails. &SIG_IO_STATE(RL_PMP) Rail Lube Pump magnet valve 2: Normally, TRUE, cycling the output from TRUE to FALSE to TRUE constitutes one stroke of the rail lube pump. &SIG_IO_STATE(RLIS) Rail Lube Inhibit Signal: A TRUE value indicates that the air brake system is requesting that flange lubrication system be disabled. &SIG_IO_STATE(RLIS) Rail Lube Inhibit Signal output to vendor flange lube equipment. Part of 'output only' LCC Controlled Rail Lube EDLs. &SIG_IO_STATE(RLNOZ1) Rail Lube Nozzle #1, Used in forward direction


RLNoz2> RqEgSpd RR ID RScrRat Rt_init RTL< RTL> Rtl_Stu RtTLIn< RtTLIn> Run< RunA< RunB< RunDis1 RunDis5 RunSDat RunTPr1 RunTPr5 RunYIx RV F< RV F> RV R< RV R> RvMBCB< S_5_VLm

&SIG_IO_STATE(RLNOZ2) &requested_max_engine_speed &PROT_DATA(railroad_id) &raw_scr_delay_ratio &RUN_TOT_DATA(rt_initialized) &SIG_IO_STATE(RTL) &SIG_IO_STATE(RTL)

Rail Lube Nozzle #2, Used in reverse direction max_eng_spd - &requested_max_engine_speed This is the railroad id signal. raw_scr_rat - &raw_scr_delay_ratio rt_init - &RUN_TOT_DATA(rt_initialized) A TRUE value indicates the relay is in the closed position. RTL Relay: A TRUE value causes the relay to be energized. This causes the trainline to be set up for SpeedMaster control. &rtl_status rtl_status- Status of the RTL contactor - Trainline Power Reduction Contactor. &SIG_IO_STATE(RTTLIN) Right Trainline cut IN - a TRUE value indicates that the RTTLIn relay has picked up. &SIG_IO_STATE(RTTLIN) Right (HEP) Trainline Cut In &SIG_IO_STATE(RUN) A TRUE value indicates that the Run/Isolate switch is in the Run position. &SIG_IO_STATE(RUNA) Run Position Of Isolation Switch In No. 1 Cab Of Two Cab Locomotives. First Used On JT42C Basic. &SIG_IO_STATE(RUNB) Run Position Of Isolation Switch In No. 2 Cab Of Two Cab Locomotives. First Used On JT42C Basic. &run_tot_data.rt_data.yearly_recor run_y_dst1 - &run_tot_data.rt_data.yearly_record[0].distance_traveled d[0].distance_traveled &run_tot_data.rt_data.yearly_recor run_y_dst5 - &run_tot_data.rt_data.yearly_record[4].distance_traveled d[4].distance_traveled &run_tot_data.service_date run_serv_d - &run_tot_data.service_date &run_tot_data.rt_data.yearly_recor run_y_pwr1 - &run_tot_data.rt_data.yearly_record[0].traction_power d[0].traction_power &run_tot_data.rt_data.yearly_recor run_y_pwr5 - &run_tot_data.rt_data.yearly_record[4].traction_power d[4].traction_power &run_tot_data.rt_data.first_year_in run_f_y_ix - &run_tot_data.rt_data.first_year_index dex &SIG_IO_STATE(RV_F) Reverser Forward Feedback: A value of TRUE indicates the reverser switch-gear is in the Forward position. &SIG_IO_STATE(RV_F) Reverser Switch-gear, Forward Position: A value of TRUE causes the switch-gear to rotate toward the forward position. &SIG_IO_STATE(RV_R) Reverser Reverse Feedback: A value of TRUE indicates the reverser is in the Reverse position. &SIG_IO_STATE(RV_R) Reverser Switch-gear, Reverse Position: A value of TRUE causes the switch-gear to rotate toward the reverse position. &SIG_IO_STATE(RVMBCB) Reverser and Motor/Brake Control Circuit Breakers: A TRUE value indicates that both the reverser and the brake transfer control circuit breakers are in the on position. &sw_5_v_lim sw_5_v_lim - &sw_5_v_lim SIGNAL DESCRIPTIONS B-75

S_ASndD S_AvDes S_Bo_In S_Bo_Ot S_BoEgO S_BoPr3 S_BwCon S_BwPth S_ComFl S_Crp S_CrpAt S_DBe S_EFail S_EngSu S_ERSt

S_IcIn S_ICM

&sw_auto_sand_disable &sw_avg_des &sw_bode_in_cal &sw_bode_out &sw_bode_eng_overload &sw_bode_power3 &sw_blower_control &sw_blower_path &sw_dis_comm_fault &sw_creep &sw_creep_active &sw_dbe &sw_eui_fail &sw_eng_su &sw_dummy_engine_running_stat e &sw_fai &sw_fake_mr_press &sw_fcc_error &sw_fld_pole_est &sw_gcc &sw_grid_deration &sw_grid_open_detection_disable d &sw_ice_in &s_icm

S_IcOt S_Iv_Fl S_Kil_F S_Kil_M S_Kil_S S_LkVal S_LocSp S_MgFRq

&sw_ice_out &sw_inv_fault &sw_kill_fast_loop &sw_kill_medium_loop &sw_kill_slow_loop &sw_link_valve_switch &sw_flt_loco_spd &sw_mg_fld_des

S_Fai S_FakMr S_FccEr S_FdPol S_Gcc S_Grddr S_GrdOD

sw_autosnd_ds - &sw_auto_sand_disable sw_avg_des - &sw_avg_des sw_bode_cali - &sw_bode_in_cal sw_bode_out - &sw_bode_out sw_eng_ov_bode - &sw_bode_eng_overload sw_bode_power3 - &sw_bode_power3 sw_blow_cont - &sw_blower_control sw_blow_path - &sw_blower_path sw_dis_com_flt - &sw_dis_comm_fault sw_crp - &sw_creep sw_crp_act - &sw_creep_active sw_dbe - &sw_dbe sw_eui_fail - &sw_eui_fail sw_eng_su - &sw_eng_su This is the switch that allows the user to change engine_running_state from the monitor. sw_fai - &sw_fai sw_fake_mr - &sw_fake_mr_press sw_fcc_error - &sw_fcc_error sw_fld_pole - &sw_fld_pole_est sw_gcc - &sw_gcc sw_grid_der - &sw_grid_deration sw_grid_dis - &sw_grid_open_detection_disabled sw_ice_in - &sw_ice_in Switch used to bypass ICM processing. TRUE means ICM will run normally, FALSE means ICM will be bypassed. sw_ice_out - &sw_ice_out sw_inv_fault - &sw_inv_fault sw_kill_fast - &sw_kill_fast_loop sw_kill_med - &sw_kill_medium_loop sw_kill_slow - &sw_kill_slow_loop sw_link_valve - &sw_link_valve_switch This switch allows the user to set a simulated filtered locomotive speed. sw_mgfld_des - &sw_mg_fld_des


S_MgFVD S_MgILm S_MgVLm S_MuxSl S_pai S_pao S_pdo S_pdsco S_Radar S_rails S_Recod S_Rel S_Scrdy S_SCREn S_ScrK S_SCRRa S_Stg S_SuDis S_Sym

&sw_mgfld_v_des &sw_mg_i_limit &sw_mg_v_limit &sw_mux_select_enabled &sw_pai &sw_pao &sw_pdo &sw_pdisco &sw_radar_output_override &sw_test_stand &sw_record &release_id &sw_SCR_delay &sw_SCR_enable &sw_scr_counter &sw_SCR_ratio &sw_stage[0] &sw_eng_su_disable &sw_sym

S_Tb_Bo S_TPwr S_Tq_bo S_Tq_Rf S_UnVRf S_UpdRt S14< S14> S25< S25> S36< S36> SaftCB<

&sw_turbo_bode &sw_traction_power_ref &sw_torque_bode &sw_tcc_torque_ref[0] &sw_undervoltage_relief &sw_update_rt &SIG_IO_STATE(S14) &SIG_IO_STATE(S14) &SIG_IO_STATE(S25) &SIG_IO_STATE(S25) &SIG_IO_STATE(S36) &SIG_IO_STATE(S36) &SIG_IO_STATE(SAFTCB)

SAnaIn

&slow_analog_input_map

sw_mgfld_vdes - &sw_mgfld_v_des sw_mg_i_lim - &sw_mg_i_limit sw_mg_v_lim - &sw_mg_v_limit sw_mux_selec - &sw_mux_select_enabled sw_pai - &sw_pai sw_pao - &sw_pao sw_dig_out - &sw_pdo sw_dis_out - &sw_pdisco sw_radar - &sw_radar_output_override sw_rails - &sw_test_stand Control switch for turning on the Recorder Function. sw_rel - &release_id sw_scr_delay - &sw_SCR_delay sw_SCR_enab - &sw_SCR_enable sw_scr_cnt - &sw_scr_counter sw_SCR_ratio - &sw_SCR_ratio sw_stage - &sw_stage[0] sw_su_dis - &sw_eng_su_disable This switch, when set true and in the Control Access Mode that will allow all signals to be displayed on the programmable meter. sw_turbo_bode - &sw_turbo_bode Software switch for releasing control of traction_power_reference. To be used with TracPwr. sw_torque_bode - &sw_torque_bode sw_tor_ref - &sw_tcc_torque_ref[0] sw_underv_rlf - &sw_undervoltage_relief sw_update_rt - &sw_update_rt S14 Contactor Feedback: A TRUE value indicates the contactor is in the closed position. S14 Contactor: A value of TRUE causes the contactor to close. S25 Contactor Feedback: A TRUE value indicates the contactor is in the closed position. S25 Contactor: A value of TRUE causes the contactor to close. S36 Contactor Feedback: A TRUE value indicates the contactor is in the closed position. S36 Contactor: A value of TRUE causes the contactor to close. Safety Control Circuit Breaker: A TRUE value indicates that the safety control circuit breaker is in the closed position. sl_an_inmap - &slow_analog_input_map SIGNAL DESCRIPTIONS B-77

SAnaOt SAND-1 SAND-2 SandLt>

&slow_analog_output_map &cc_sand_request[0] &cc_sand_request[1] &SIG_IO_STATE(SANDLT)

SbPE<

&SIG_IO_STATE(SBPE)

SbPE>

&SIG_IO_STATE(SBPE)

SBY Frq Sby HE<

&ANA_IN_SLOW(SBY_FRQ) &SIG_IO_STATE(SBY_HE)

SbyReq< SC Ref

&SIG_IO_STATE(SBYREQ) &internal_TL_24T

SCFedB<

&SIG_IO_STATE(SCFEDB)

SCFedB> SCFedF<

&SIG_IO_STATE(SCFEDB) &SIG_IO_STATE(SCFEDF)

SCFedF> SCR Dl% SCR Dl% SCR Rat

&SIG_IO_STATE(SCFEDF) &scr_delay_ratio &scr_delay_ratio &ANA_OUT(SCR_RAT)

SCTLSW<

&SIG_IO_STATE(SCTLSW)

SCTrmB<

&SIG_IO_STATE(SCTRMB)

SCTrmB> SCTrmF<

&SIG_IO_STATE(SCTRMB) &SIG_IO_STATE(SCTRMF)

SCTrmF> SensV1 SensV2 SensV3

&SIG_IO_STATE(SCTRMF) &ANA_IN_SLOW(SENSV[0]) &ANA_IN_SLOW(SENSV[1]) &ANA_IN_SLOW(SENSV)

sl_an_outmap - &slow_analog_output_map Automatic sand request #1. Automatic sand request #2. LCC Controlled Sand Light: a TRUE value indicates that the sand light is to be turned on, indicating that at least one of the sanding magnet valves is active. Stand By Power Enable Feedback: A TRUE value indicates that the relay is in the closed position. Standby Power Enable: A TRUE value indicates that the locomotive traction power circuit is in a state that allows standby HEP circuit to be setup. Standby HEP Electrical Frequency Standby Head End Power: A TRUE value indicate that the standby HEP power circuit is ready and the control system may now begin its process of initiating standby HEP. Standby HEP Request: A TRUE value indicates that the operator has requested standby HEP. Internally calculated Speed Control Reference. Used to replace BOTH SSC_REF and TL_24T on units that have SC_VAM_APPLIED = NO. Summary Circuit Feed B-End feedback - a TRUE value indicates that the SCFedB relay is picked up. Summary Circuit Feed B-end Summary Circuit Feed F-End feedback - a TRUE value indicates that the SCFedF relay is picked up. Summary Circuit Feed F-end SCR delay percentage (0-100%) SCR delay percentage (0-100%) SCR Delay Ratio: The SCR delay ratio requested of the SCR bridge. This signal is used by the RAILS system to simulate the locomotives loading. Speed Control Train Line SWitch input: A TRUE (1) value indicates the input from the SCTLSW on the control panel is in the US mode which requires a maximum of 70 VDC. A FALSE (0) value means 50 V maximum system. Summary Circuit Terminate B-End feedback - a TRUE value indicates that the SCTrmB relay is picked up. Summary Circuit Terminate B-end Summary Circuit Terminate F-End feedback - a TRUE value indicates that the SCTrmF relay is picked up. Summary Circuit Terminate F-end Sensor voltage as detected by EMDEC ECM #1. Sensor voltage as detected by EMDEC ECM #2. Sensor voltage as detected by EMDEC ECM #3. SIGNAL DESCRIPTIONS B-78

SfTstRq SGC< SGCA< SGCA> Sibas1F Sibas2F SLCSCO<

Sno Op< Sp_St Spare1 Spare2 Spare3 Spare4 SpareIn

SpdCnRq SpdCnSt SpdMetr SPMR< SpotSw< SpPiVLm SpPiVSt spr_ain spr_d<

&self_test_request &SIG_IO_STATE(SGC)

self_tst_req - &self_test_request Series Generator Contactor Feedback: A value of TRUE indicates the contactor is in the closed position. &SIG_IO_STATE(SGCA) Series Generator Auxiliary Contactor Feedback: A value of TRUE indicates that the SGCA contactor is in the closed position &SIG_IO_STATE(SGCA) Series Generator Contactor Auxiliary: A value of TRUE will place the two main generator halves in series. A value of FALSE will place the two main generator halves in parallel. &tcc_sibas_temperature[0] Sibas 1 temperature. &tcc_sibas_temperature[1] Sibas 2 temperature. &SIG_IO_STATE(SLCSCO) (Locomotive) Speed Limiter & Cab Signal Cut-Out: An EM2000 input signal that is passed through to ICE indicating the status of the LSL & CS system. A TRUE value (input high) indicates that this system is/should be cutout. &SIG_IO_STATE(SNO_OP) Snow Operation or Winterization Switch: A TRUE value indicates the operator's request to put the unit into a winterization mode. &drop_traction_data.slipped_pinio sp_state - &drop_traction_data.slipped_pinion_info.state_flag n_info.state_flag &ANA_OUT(SPARE1) Spare Analog Output Channel &ANA_OUT(SPARE2) Spare Analog Output Channel &ANA_OUT(SPARE3) Spare Analog Output Channel &ANA_OUT(SPARE4) Spare Analog Output Channel &ANA_IN_SLOW(SPAREIN) AC RAILs Speed Input: This input is required to indicate the locomotive movement direction and high resolution speed to RAILs for testing AC locomotives. This information is then passed on to the TCC model. Required on all AC locomotive. &speed_control_request spd_cntl_req - &speed_control_request &speed_control_request_status spd_cntl_st - &speed_control_request_status &ANA_OUT(SPDMETR) Speedometer (120 km/h) driven by ADA module based on EM2000 signal. Note: 120 km/h = 9.00VDC = 1842 bits &SIG_IO_STATE(SPMR) Station Protection Magnetic Receiver. First used on Queensland GT42CU-AC locomotives (969160 order). EM2000 to ICE communications. &SIG_IO_STATE(SPOTSW) Spotter Switch: A value of the TRUE indicates the operator's request to move the locomotive using the spotter mode. &voltage_limit_data.slipped_pinion spvl_limit - &voltage_limit_data.slipped_pinion_voltage_info.voltage_limit _voltage_info.voltage_limit &voltage_limit_data.slipped_pinion spvl_state - &voltage_limit_data.slipped_pinion_voltage_info.state_flag _voltage_info.state_flag &ANA_IN_SLOW(SPR_AIN) Spare Channel &SIG_IO_STATE(SPR_D) Spare Input Channel SIGNAL DESCRIPTIONS B-79

spr_d> spr_fin SqWav1> SS Rf V SSC Ref Ssc_Stu SSCDnA<

&SIG_IO_STATE(SPR_D) &ANA_IN_SLOW(SPR_FIN) &SIG_IO_STATE(SQWAV1) &super_series_voltage &ANA_OUT(SSC_REF) &ssc_status &SIG_IO_STATE(SSCDNA)

SSCDnB<

&SIG_IO_STATE(SSCDNB)

SSCDwn<

&SIG_IO_STATE(SSCDWN)

SSCOfA<

&SIG_IO_STATE(SSCOFA)

SSCOfB<

&SIG_IO_STATE(SSCOFB)

SSCOff<

&SIG_IO_STATE(SSCOFF)

SSCOff< SSCOn<

&SIG_IO_STATE(SSCOFF) &SIG_IO_STATE(SSCON)

SSCOn< SSCOnA<

&SIG_IO_STATE(SSCON) &SIG_IO_STATE(SSCONA)

SSCOnB<

&SIG_IO_STATE(SSCONB)

SSCR<

&SIG_IO_STATE(SSCR)

SSCR>

&SIG_IO_STATE(SSCR)

SSCR_Ph SSCReq<

&SCR_phase_selection &SIG_IO_STATE(SSCREQ)

SscTqLm SSCUp<

&ssc_torque_limit &SIG_IO_STATE(SSCUP)

Spare Input Channel Spare Frequency Input channel Full-time square wave; 0.3 sec ON, 0.3 sec OFF Super Series voltage reference. The desired output voltage of the slow speed control amplifier. ssc_status - &ssc_status Slow Speed Control Set Speed Decrease: A TRUE value indicates the operator's request to decrease the slow speed control system's set speed. Request from CAB1. Slow Speed Control Set Speed Decrease: A TRUE value indicates the operator's request to decrease the slow speed control system's set speed. Request from CAB2. Slow Speed Control Set Speed Decrease: A TRUE value indicates the operator's request to decrease the slow speed control system's set speed. Slow Speed Control Exit Switch: A TRUE value indicates an operator's request to exit slow speed operation. Request from CAB1. Slow Speed Control Exit Switch: A TRUE value indicates an operator's request to exit slow speed operation. Request from CAB2. Slow Speed Control Exit Switch: A TRUE value indicates an operator's request to exit slow speed operation. Derived Speed Control Off Signal. Slow Speed Control Activation Switch: A TRUE value indicates an operator's request to begin slow speed operation or precede to the next display screen. Derived Speed Control On Signal. Slow Speed Control Exit Switch: A TRUE value indicates an operator's request to enter slow speed operation. Request from CAB1. Slow Speed Control Exit Switch: A TRUE value indicates an operator's request to enter slow speed operation. Request from CAB2. Slow Speed Control Relay Feedback: A value of TRUE indicates that the relay is in the closed position. Slow Speed Control Relay: This relay switches the source of the TL_24T signal from the brake handle (when SSCR is FALSE) to the Slow Speed Control Amplifier and switches GFC control from 6T (when SSCR is FALSE) to TL_1T. A TRUE value indicates the locomot sw_scr_phase - &SCR_phase_selection Slow Speed Request : A TRUE value indicates that a vender slow speed control system is requesting slow speed operation. ssc_tor_lim - &ssc_torque_limit Slow Speed Control Set Speed Increase: A TRUE value indicates the operator's request to increase the slow speed control system's set speed. SIGNAL DESCRIPTIONS B-80

SSCUpA< SSCUpB< St Ovl< ST< STA>

Start< START<

start_d StartA< StartB< STE< STE> StFuse< StgDet stop_d StopTL< Str_Sys StrtStu StrtTL< Sw EPL< SW ID T1%Adh T1
&SIG_IO_STATE(SSCUPA)

Slow Speed Control Set Speed Increase: A TRUE value indicates the operator's request to increase the slow speed control system's set speed. Request from CAB1. &SIG_IO_STATE(SSCUPB) Slow Speed Control Set Speed Increase: A TRUE value indicates the operator's request to increase the slow speed control system's set speed. Request from CAB2. &SIG_IO_STATE(ST_OVL) Starter Motor Thermal Overload Switch: A TRUE value indicates a starter overload. &SIG_IO_STATE(ST) Start Contactor Feedback: A value of TRUE indicates that the start contactor is in the closed position and the starters pinion has engaged with the engine's ring gear. &SIG_IO_STATE(ST) Starter Auxiliary Contactor: A value of TRUE causes the auxiliary contactor to close. This causes the ST contactor to close and completes the engine's starter circuit if an abutment condition is not encountered. &SIG_IO_STATE(START) A value of TRUE indicates that the Start/Prime switch is in the Start position. &SIG_IO_STATE(START) Air Brake Not Applied Cab A: A TRUE value indicates that there is a request from the operators console in Cab #1 to not apply the automatic air brakes (Request through CAB1). First used on EW&S JT42CWR (input is normally closed). &start_dump Index of the first buffer entry to dump. &SIG_IO_STATE(STARTA) Start Switch In No. 1 Cab Of Two Cab Locomotives. First Used On JT42CWR. (SWG) &SIG_IO_STATE(STARTB) Start Switch In No. 2 Cab Of Two Cab Locomotives. First Used On JT42CWR. (SWG) &SIG_IO_STATE(STE) Start Enable: A TRUE value indicates that the STE relay has picked up, providing a contactor feedback signal to the LCC. &SIG_IO_STATE(STE) Start Enable: A TRUE value energizes the STE relay coil, which then provides a feed, via a N.O. STE interlock, to the remainder of the start circuit components. First used on platform. &SIG_IO_STATE(STFUSE) Start Fuse: This input is used to monitor whether the Start Fuse is intact. A value of TRUE indicates that the fuse is intact. A value of FALSE indicates that the fuse has blown. &stage_detected stagedetect - &stage_detected &stop_dump Index of the last buffer entry to dump. &SIG_IO_STATE(STOPTL) Engine Stop Trainline &all_start_systems_online Boolean to describe if all the start systems are online. &starter_status starter_status - &starter_status &SIG_IO_STATE(STRTTL) Engine Start Trainline &SIG_IO_STATE(SW_EPL) Engine Prelube switch Feedback: A TRUE value indicates that the switch is closed. &PROT_DATA(software_id) This is the software id signal. &creep_control_adhesion[0] This is the percent adhesion that is being seen by truck #1. &DISCRETE_IN(FAULT_CODE[0] TCC 1 fault code ) &DISCRETE_IN(FAULT_CLASS[0 TCC 1 fault class ])


T1
&display_ipm_control_mode[0]

T1
&ipm_test_state[0]

T13RL A T13RL V T16LIM<

&ANA_IN_SLOW(TRL_A) &ANA_IN_SLOW(TRL_V) &SIG_IO_STATE(TLIM)

T17LIM<

&SIG_IO_STATE(TLIM)

T1ACOpn

&SIG_IO_STATE(TACOPN)

T1Addr

&DISCRETE_IN(TADDR[0])

TCC #1 IPM control mode. (00=IPM uncontrolled, 01=IPM controlled by TCC1, 11=IPM controlled by TCC2) TCC #1 protection state. (00=Test not requested, 01=Teis in progress, 10=Test passed, 11=Test Failed) Third Rail Current. Third Rail Voltage. A True values indicates that the LCC should increase the engine speed two notches in excess of the traction and voltage, or if in TH8 reduce the traction and voltage throttle to TN 6 A True value indicates that the LCC should increase the engine speed one notch in excess of the traction and voltage throttle, or if in TH 8 reduce traction and voltage to Th 7 A TRUE value indicates that the ASG has requested that the AC (HEP) Contactor be dropped out. The value of this field is the address of the source of the serial data pack. 0001 = Sent by TCC #1 0010 = Sent by TCC #2

T1AddrA

&DISCRETE_OUT(TADDRA)

other = Undefined Destination Address: 0001 = TCC #1

T1AddrB

&DISCRETE_IN(TADDRB)

T1Addrs

&DISCRETE_OUT(TADDRS)

T1AdHD> T1AdPMT T1AdSo>

&SIG_IO_STATE(TADHD) &ANA_OUT(TADPMT) &SIG_IO_STATE(TADSO)

T1AdSPF

&SIG_IO_STATE(TADSPF)

T1AMPMF

&ANA_OUT(TAMPM)

0010 = TCC #2 Address Check BYTE: The value of this field is the address of the source of the serial data pack in BYTE length. 01Hex is defined as the SIBAS32, for a single ASG system (Type C packet). ASG Destination Address: 01Hex established for SIBAS32, single ASG communication. Packet Type C. Adjacent Soft Crowbar: A TRUE value indicates that the other TCC has fired a soft crowbar. The maximum phase module temperature for the adjacent inverter. Adjacent Hard Crowbar Fired: A TRUE value indicates that the other TCC has fired a hard crowbar. TRUE value indicates ALL speed probes on adjacent inverter have failed - or communications failure exists between adjacent inverter and LCC Temperature of the hottest Phase Module on the adjacent traction inverter.


T1ASnbF T1ATCCF T1AType T1AvRPM T1BByt T1BBytA

T1BHig< T1BlDta T1BLow< T1BlwA T1Blwr> T1Brk< T1Brk> T1BrkA1 T1BrkA2 T1BrkA3 T1BrkR1 T1BrkR2 T1BrkR3 T1BSt> T1Busy

&ANA_OUT(TASNB[0])

Adjacent Snubber Resistor Temperature: The snubber resistor temperature from the other TCC. &ANA_OUT(TATCC[0]) Adjacent TCC Cabinet Temperature: The TCC cabinet temperature from the other TCC. &DISCRETE_OUT(TATYPE) 4 bit signal to indicate the type of A-Type locomotive - be it SD70MAC, GT46MAC, GT46PAC, etc. &avg_truck_rpm[0] Average motor speed for Truck #1 &DISCRETE_IN(TBBYT) Busy Check BYTE: The number received should one higher than the value sent to the TCC the previous loop. A time delay must be instituted to allow the TCC to respond. &DISCRETE_OUT(TBBYTA) Busy Check Byte: The SIBAS32 will add one to this signal and then send it back on a serial input. The LCC should increase this number and then repeat the process. Failure of the TCC to respond properly indicates a failed communications link. &SIG_IO_STATE(TBHIG) A TRUE value indicates that the TCC would like the TCC blower set to high speed. &DISCRETE_OUT(TBLDTA) Value sent to the TCC Simulator to allow simulator to know current state of the TCC Blower OFF, LOW MED, or HIGH speed modes. &SIG_IO_STATE(TBLOW) A TRUE value indicates that the TCC would like the TCC blower set to low speed. &ANA_IN_SLOW(TBLWA[0]) TCC blower current in one phase. &SIG_IO_STATE(TBLWR) A bit telling the inverter whether or not the TCC blower is following the TCC request. &SIG_IO_STATE(OP_MODE_BR A TRUE value indicates that the TCC is in the brake mode. K) &SIG_IO_STATE(OP_MODE_BR A TRUE value indicates that the LCC is requesting a brake mode. K) &SIG_IO_STATE(OP_MODE_BR (#ASG=1) A TRUE value indicates that the TCC1 is in the brake mode. K) &SIG_IO_STATE(OP_MODE_BR (#ASG=1) A TRUE value indicates that the TCC2 is in the brake mode. K) &SIG_IO_STATE(OP_MODE_BR (#ASG=1) A TRUE value indicates that the TCC3 is in the brake mode. K) &SIG_IO_STATE(OP_MODE_BR (#ASG=1) A TRUE value indicates that the LCC is requesting a brake mode for TCC #1. K) (Associated with TRUCK #1) &SIG_IO_STATE(OP_MODE_BR (#ASG=1) A TRUE value indicates that the LCC is requesting a brake mode for TCC #2. K) (Associated with TRUCK #2) &SIG_IO_STATE(OP_MODE_BR (#ASG=1) A TRUE value indicates that the LCC is requesting a brake mode for TCC #3. K) (Associated with Head End Power) &SIG_IO_STATE(TBST) A bit sent to the inverter indicating if the clean air blower is following the ASG request. &DISCRETE_IN(TBUSY[0]) The number received should one higher than the value sent to the TCC the previous loop. A time delay must be instituted to allow the TCC to respond.


T1BusyA

&DISCRETE_OUT(TBUSYA)

T1BWS> T1Cap V T1CAV>

&SIG_IO_STATE(TBWS) &ANA_IN_SLOW(TCAP_V) &SIG_IO_STATE(TCAV)

T1CBTA< T1CBTR< T1CBTS> T1CFRq> T1Ch1F3

&SIG_IO_STATE(TCBTA) &SIG_IO_STATE(TCBTR) &SIG_IO_STATE(TCBTS) &SIG_IO_STATE(TCFRQ) &SIG_IO_STATE(TCHF)

T1Ch2F3

&SIG_IO_STATE(TCHF)

T1ChpF1

&SIG_IO_STATE(TCHPF)

T1ChpF2

&SIG_IO_STATE(TCHPF)

T1ChpLc

&SIG_IO_STATE(TCHPLC)

T1ChpT1 T1ChpT2 T1ChpT3 T1ChpT4 T1ChpVR

&ANA_IN_SLOW(TCHPT) &ANA_IN_SLOW(TCHPT) &ANA_IN_SLOW(TCHPT) &ANA_IN_SLOW(TCHPT) &SIG_IO_STATE(TCHPVR)

T1ChRst

&SIG_IO_STATE(TCHRST)

T1CLSU<

&SIG_IO_STATE(TCLSU)

T1CroTs

&SIG_IO_STATE(TCROTS)

T1CTA< T1CTC1>

&SIG_IO_STATE(TCTA) &SIG_IO_STATE(TCTC)

Busy Check: The TCCs will add one to this signal and then send it back on a serial input. The LCC should increase this number and then repeat the process. Failure of the TCC to respond properly indicates a failed communications link. A TRUE value indicates that the LCC desires the TCC to activates its wheel slip system. Filter Capacitor Voltage. A TRUE value indicates that companion alternator output is occurring. This is detected by the presence of a companion alternator frequency. A TRUE value indicates that the TCC is ready to perform a crowbar test. A TRUE value indicates that the crowbar test was successful. A TRUE value indicates that the TCCs should setup for a crowbar test. A TRUE value indicates that the TCCs should fire the crowbar for the capacitor test. A TRUE value indicates that Chopper Module #1 associated with the #3/HEP inverter is determined to be failed. A TRUE value indicates that Chopper Module #2 associated with the #3/HEP inverter is determined to be failed. A TRUE value indicates that the Chopper Module associated with the #1 Truck inverter is determined to be failed. A TRUE value indicates that the Chopper Module associated with the #2 Truck inverter is determined to be failed. A TRUE value indicates that the Chopper has had several minor faults that have persisted. The condition has not been corrected so the Chopper is now locked. Chopper temperature #1. Chopper temperature #2. Chopper temperature #3. Chopper temperature #4. Digital signal from LCC to ASG for dual mode locomotive to request a reduction in the DCL voltage from the chopper while operating in electric mode. To be utilized during electric to diesel transitions A TRUE value indicates that the LCC would like the permanent lock associated with the Chopper Modules to be reset. Where the chopper modules are associated with 3rd Rail (E Mode) operation. This input when TRUE will request an engine speedup equivalent to a governor 3 speed for inverter cooling. A TRUE value indicates that ASG should proceed in performing a crowbar test. Used for Single ASG system. A TRUE value indicates that the TCC is ready to perform a capacitor test. A TRUE value indicates that TCC #1 should perform a crowbar test. SIGNAL DESCRIPTIONS B-84

T1CTC2> T1CTR< T1CTRq> T1Day T1DCL V T1DCL> T1DCLP1 T1DCLP2 T1DCLV T1DirF< T1DirF> T1DirR< T1DirR> T1Dis1>

&SIG_IO_STATE(TCTC) &SIG_IO_STATE(TCTR) &SIG_IO_STATE(TCTRQ) &DISCRETE_OUT(TDAY) &ANA_OUT(TDCL_V[0]) &SIG_IO_STATE(TDCL) &ANA_IN_SLOW(TDCLP) &ANA_IN_SLOW(TDCLP) &ANA_IN_SLOW(TDCLV[0]) &SIG_IO_STATE(DIRECTION_F) &SIG_IO_STATE(DIRECTION_F) &SIG_IO_STATE(DIRECTION_R) &SIG_IO_STATE(DIRECTION_R) &SIG_IO_STATE(TDIS)

T1Dis2>

&SIG_IO_STATE(TDIS)

T1Dis3>

&SIG_IO_STATE(TDIS)

T1DMTyp

&SIG_IO_STATE(TDMTYP)

T1E100A T1E100D T1E100R T1E25Ak T1E25D< T1E25Rq T1ElBrk

&SIG_IO_STATE(TEA) &SIG_IO_STATE(TED) &SIG_IO_STATE(TER) &SIG_IO_STATE(TEAK) &SIG_IO_STATE(TED) &SIG_IO_STATE(TERQ) &SIG_IO_STATE(TELBRK[0])

T1EMdAk T1EMdRq

&SIG_IO_STATE(TEMDAK) &SIG_IO_STATE(TEMDRQ)

A TRUE value indicates that TCC #2 should perform a crowbar test. A TRUE value indicates that the capacitor test was successful. A TRUE value indicates that the TCCs should setup for a capacitor test. Current Date: Day The main alternator DC output voltage. A TRUE value indicates that the DC link in the open position. DC Link Power - Truck #1 Inverter DC Link Power - Truck #2 Inverter DC link voltage as measured by the TCC from the isolated side of the DC link. A TRUE value indicates that the TCC is setup for the forward direction. A TRUE value indicates a request for operation in the forward direction. A TRUE value indicates that the TCC is setup for the reverse direction. A TRUE value indicates a request for operation in the reverse direction. A TRUE value indicates that TCC #1 is Cut-In. Where TCC #1 is defined as the inverter associated with TRUCK #1. A TRUE value indicates that TCC #2 is Cut-In. Where TCC #2 is defined as the inverter associated with TRUCK #2. A TRUE value indicates that TCC #3 is Cut-In. Where TCC #3 is defined to be the Head End Power Inverter. A TRUE value indicates that the LCC is characterized for a Dual Mode Locomotive Type (Diesel Mode / Electric Mode). A TRUE value indicates that the 91.667Hz- 100Hz EMI Test has passed. A TRUE value indicates that the TCC has detected excessive levels of 91.667Hz- 100Hz EMI. A TRUE value indicates that the LCC is requesting that the 91 2/3 Hz - 100 Hz EMI test be run. A TRUE value indicates that the 25Hz EMI Test has passed. A TRUE value indicates that the TCC has detected excessive level of 25Hz EMI. A TRUE value indicates that the LCC is requesting that the 25 Hz EMI test be run. Indication to the inverters whether or not the electric parking brake is applied. a True value indicates applied. A TRUE value indicates that the ASG is setup for Electric Mode Operation. A TRUE value indicates that the LCC is requesting Electric Mode (E Mode) operation.


T1FClas

&DISCRETE_IN(TFCLAS[0])

The class of TCC fault. 80h = A Class Fault 40h = B Class Fault 20h = C Class Fault 10h = D Class Fault 08h = E Class Fault

T1FCls1

&DISCRETE_IN(TFCLS)

00h = No Fault Class (#ASG=1)The class of TCC fault. 80h = A Class Fault 40h = B Class Fault 20h = C Class Fault 10h = D Class Fault 08h = E Class Fault

T1FCls2

&DISCRETE_IN(TFCLS)

00h = No Fault Class (#ASG=1)The class of TCC fault. 80h = A Class Fault 40h = B Class Fault 20h = C Class Fault 10h = D Class Fault 08h = E Class Fault 00h = No Fault Class SIGNAL DESCRIPTIONS B-86

T1FCls3

&DISCRETE_IN(TFCLS)

(#ASG=1)The class of TCC fault. 80h = A Class Fault 40h = B Class Fault 20h = C Class Fault 10h = D Class Fault 08h = E Class Fault

T1FClsA

&DISCRETE_IN(TFCLSA)

00h = No Fault Class The class of TCC fault. 80h = A Class Fault 40h = B Class Fault 20h = C Class Fault 10h = D Class Fault 08h = E Class Fault

T1FClsC

&DISCRETE_IN(TFCLSC)

00h = No Fault Class The class of TCC fault. 80h = A Class Fault 40h = B Class Fault 20h = C Class Fault 10h = D Class Fault 08h = E Class Fault 00h = No Fault Class SIGNAL DESCRIPTIONS B-87

T1FCod1

&DISCRETE_IN(TFCOD)

T1FCod2

&DISCRETE_IN(TFCOD)

T1FCod3

&DISCRETE_IN(TFCOD)

T1FCodA

&DISCRETE_IN(TFCODA)

T1FCodC

&DISCRETE_IN(TFCODC)

T1FCode T1FDCAk T1FDCCB T1FDCEn

&DISCRETE_IN(TFCODE[0]) &SIG_IO_STATE(TFDCAK) &SIG_IO_STATE(TFDCCB) &SIG_IO_STATE(TFDCEN)

T1FDCRq

&SIG_IO_STATE(TFDCRQ)

T1FDCTR

&SIG_IO_STATE(TFDCTR)

T1FLocV

&ANA_OUT(TFLOCV)

T1FltIn T1FlxAc

&ANA_IN_SLOW(TFLTIN) &SIG_IO_STATE(TFLXAC)

T1FLXRq

&SIG_IO_STATE(TFLXRQ)

T1Freq

&ANA_IN_SLOW(TFREQ)

T1Freq1

&ANA_IN_SLOW(TFREQ)

T1Freq2

&ANA_IN_SLOW(TFREQ)

T1GapFa

&SIG_IO_STATE(TGAPFA)

(#ASG=1) A code representing the current fault condition associated with the #1 Truck Inverter (TCC1). (#ASG=1) A code representing the current fault condition associated with the #2 Truck Inverter (TCC2). (#ASG=1) A code representing the current fault condition associated with the HEP Inverter (TCC3). A code representing the current fault condition associated with the ASG and/or the HEP transformer. A code representing the current fault condition associated with the Chopper Module(s) or the 3rd rail system. A code representing the current fault condition. A TRUE value indicates that the Fast DC Circuit Breaker Test has passed. A TRUE value indicates that the Fast DC Circuit Breaker is closed. FDCCB ENABLE: A TRUE value indicates that the FDCCB (Fast DC Breaker) is to be enabled (closed). This signal is needed by the TCC Model and is associated with 3rd rail, Electric Mode, operation. A TRUE value indicates that the LCC conditions have been satisfied to request the closure of the Fast DC Breaker (associated with 3rd rail, Electric Mode, operation). A TRUE value indicates that the LCC is requesting the ASG to initiate the Fast DC Breaker and PreCharge Switch Test. Filtered Locomotive Speed sent to the DM30AC for use in the backup 144ft calculations for excessive gap length and FDCCB opening. scale basis 29m/sec = 4000hex, Filter inductor temperature. ASG acknowledgement of request for flux. Flux is required for proper reaction to gaps while the locomotive is in the electric mode. LCC request to ASG for maintaining flux in the traction motors. Flux is required for proper reaction to gaps while the locomotive is in the electric mode. TCC output fundamental frequency - hertz - as calculated by the ASG on a per inverter basis. First utilized on Platform Phase2 for AC traction motor temperature simulation TCC output fundamental frequency - hertz - as calculated by the ASG for TCC #1. First utilized on Platform Phase2 for AC traction motor temperature simulation TCC output fundamental frequency - hertz - as calculated by the ASG for TCC #2. First utilized on Platform Phase2 for AC traction motor temperature simulation A TRUE value indicates that the ASG has determined that its gap detection scheme has experienced a failure.


T1GapMo

&SIG_IO_STATE(TGAPMO)

T1GapPD

&SIG_IO_STATE(TGAPPD)

T1GovRq

&DISCRETE_OUT(TGOVRQ)

T1GTO< T1GTO1A

T1GTO1R T1GTO2A

T1GTO2R T1GTO3A

T1GTO3R T1GTO4A

T1GTO4R T1GTOA> T1Hard< T1HDCLP T1HEPA T1HEPA1 T1HEPA2

A TRUE value indicates that the ASG gap detection criteria has been met, and it is presumed that the locomotive has encountered a gap in the 3rd Rail system and the ASG is in GAP MODE A TRUE value indicates the locomotive has physically detected a gap in the third rail system. This does NOT necessarily mean the ASG has placed the operation in gap mode, just a physical gap is present. Inverter Governor Request: Nibble representation of the current governor request.

0 = Idle,1= throttle 1, 2 = throttle 2, ... A TRUE value indicates the TCC would like the power supply turned on. GTO #1 Power Supply Acknowledge: A TRUE value indicates that the GTO #1 power supply contactor is in the closed position as indicated by the contractor's feedback. Where GTO #1 is associated with the #1 Truck inverter. &SIG_IO_STATE(TGTOR) A TRUE value indicates the ASG would like the power supply designated as #1 to be turned on. &SIG_IO_STATE(TGTOA) GTO #2 Power Supply Acknowledge: A TRUE value indicates that the GTO #2 power supply contactor is in the closed position as indicated by the contractor's feedback. Where GTO #2 is associated with the #2 Truck inverter. &SIG_IO_STATE(TGTOR) A TRUE value indicates the ASG would like the power supply designated as #2 to be turned on. &SIG_IO_STATE(TGTOA) GTO #3 Power Supply Acknowledge: A TRUE value indicates that the GTO #3 power supply contactor is in the closed position as indicated by the contractor's feedback. Where GTO #3 is associated with the #3 (HEP) inverter. &SIG_IO_STATE(TGTOR) A TRUE value indicates the ASG would like the power supply designated as #3 to be turned on. &SIG_IO_STATE(TGTOA) GTO #4 Power Supply Acknowledge: A TRUE value indicates that the GTO #4 power supply contactor is in the closed position as indicated by the contractor's feedback. Where GTO #4 is associated with the 3rd Rail Chopper Modules. &SIG_IO_STATE(TGTOR) A TRUE value indicates the ASG would like the power supply designated as #4 to be turned on. &SIG_IO_STATE(TGTOA) GTO Power Supply Acknowledge: A TRUE value indicates that the GTO power supply contactor is in the closed position as indicated by the contractor's feedback. &SIG_IO_STATE(THARD) A TRUE value indicates that the inverter has fired a hard crowbar. &ANA_IN_SLOW(THDCLP) DC Link Power - HEP Configured Inverter - as determined by the ASG and utilized for load control during electric operation of the DM30AC &ANA_IN_SLOW(THEPA) HEP / APS Inverter Output Current as measured by the TCC from the inverter side of the HEP Transformer. &SIG_IO_STATE(OP_MODE_HE (#ASG=1) A TRUE value indicates that the TCC1 is in the hep mode. P) &SIG_IO_STATE(OP_MODE_HE (#ASG=1) A TRUE value indicates that the TCC2 is in the hep mode. P) &SIG_IO_STATE(TGTO) &SIG_IO_STATE(TGTOA)


T1HEPA3 T1HEPCl

T1HEPCT

T1HEPFr T1HEPPw T1HEPR1 T1HEPR2 T1HEPR3 T1HEPVR T1HiAk> T1Hr T1HrtL>

T1Hz25D T1IGV< T1IGV> T1ImmO>

T1IndT1 T1IndT2

&SIG_IO_STATE(OP_MODE_HE (#ASG=1) A TRUE value indicates that the TCC3 is in the hep mode. P) &SIG_IO_STATE(THEPCL) A TRUE value indicates that any or all of the AC Contactors (at least 1, if Split Bus Configuration) are requested to be picked up, based upon the AC Contactor pilot relay outputs from the LCC. Where the HEP Contactors are the AC Contactors and are the c &SIG_IO_STATE(THEPCT) HEP / APS Inverter System Current Transducer Failed - A TRUE value indicates that the ASG has detected a failed CT at the secondary of the HEP transformer. The HEP inverter is switched to a back-up processing operation which does not utilize this value. &ANA_IN_SLOW(THEPFR) HEP Inverter Output - Supply Frequency as measured by the TCC from the inverter side of the HEP Transformer. &ANA_IN_SLOW(THEPPW) HEP Inverter Output Power as measured by the TCC from the inverter side of the HEP Transformer. &SIG_IO_STATE(OP_MODE_HE (#ASG=1) A TRUE value indicates that the LCC is requesting a hep (head end power) mode for P) TCC #1. (Where TCC #1 is the inverter associated with TRUCK #1) &SIG_IO_STATE(OP_MODE_HE (#ASG=1) A TRUE value indicates that the LCC is requesting a hep (head end power) mode for P) TCC #2. (Associated with TRUCK #2) &SIG_IO_STATE(OP_MODE_HE (#ASG=1) A TRUE value indicates that the LCC is requesting a hep (head end power) mode for P) TCC #3. (Associated with Head End Power) &ANA_IN_SLOW(THEPVR) HEP Inverter Output - Supply Voltage (RMS Line to Line) as measured by the TCC from the inverter side of the HEP Transformer. &SIG_IO_STATE(THIAK) TCC Blower High Speed Acknowledge: A TRUE value indicates that the TCC high speed blower contactor is in the closed position as indicated by the contractor's feedback. &DISCRETE_OUT(THR) Current Time: Hours &SIG_IO_STATE(THRTL) This is the acknowledge of the TCC HEATER LOW REQUEST signal. This is only an acknowledge of the request and does not indicate the LCC's ability to pick up the Heater contactor. &SIG_IO_STATE(THZD) A TRUE value indicates that the LCC is requesting the penalty associated with the 25Hz EMI Monitoring function to be disabled. ???lmc &SIG_IO_STATE(TIGV) A TRUE value indicates that the TCC feels warm and would like the cooling air to be restored to normal. &SIG_IO_STATE(TIGV) A TRUE value indicates that the LCC has opened the inlet guide vane ( AKA shutter ). &SIG_IO_STATE(TIMMO) A TRUE value indicates that the LCC is exiting power or brake without delay. The LCC will no longer control the DC link voltage so the TCCs should take the actions necessary to avoid undesired consequences. &ANA_IN_SLOW(TINDT) Chopper inductor temperature #1. &ANA_IN_SLOW(TINDT) Chopper inductor temperature #2.


T1InvH<

&SIG_IO_STATE(TINVH)

T1IPS>

&SIG_IO_STATE(TIPS)

T1LCCIO T1LcMph T1LdRq

&SIG_IO_STATE(TLCCIO) &ANA_OUT(TLC) &DISCRETE_OUT(TLDRQ)

T1LdRq1

&DISCRETE_OUT(TLDRQ)

0 = Idle,1= throttle 1, 2 = throttle 2, ... (#ASG=1) TCC #1 Inverter Load Request: Nibble representation of the current load request for TCC #1.

T1LdRq2

&DISCRETE_OUT(TLDRQ)

0 = Idle,1= throttle 1, 2 = throttle 2, ... (#ASG=1) TCC #2 Inverter Load Request: Nibble representation of the current load request for TCC #2.

T1LkRs1

&SIG_IO_STATE(TLKRS)

T1LkRs2


T1LkRs3


T1LkRst T1LoAk>

&SIG_IO_STATE(TLKRST[0]) &SIG_IO_STATE(TLOAK)

T1Lock<

&SIG_IO_STATE(TLOCK)

T1Lock1


T1Lock2


T1Lock3


A TRUE value indicates that the TCC feels cold and would like its heater turned on. This is the heater demand that -requires- the engine speed to be limited/increased. This indicates the coldest level for the inverter. This output indicates the status of the IPS pressure switch. A FALSE indicates that there is a locomotive air brake application and a TRUE indicates no air brakes applied. A TRUE value indicates that locomotive control computer is in the process of testing contactors. Locomotive Velocity: The velocity of the locomotive with long hood forward movement positive. Inverter Load Request: Nibble representation of the current load request.

0 = Idle,1= throttle 1, 2 = throttle 2, ... A TRUE value indicates that the LCC would like TCC #1 to reset its permanent inverter lock. Where TCC #1 is defined as the inverter associated with TRUCK #1. A TRUE value indicates that the LCC would like TCC #2 to reset its permanent inverter lock. Where TCC #2 is defined as the inverter associated with TRUCK #2. A TRUE value indicates that the LCC would like TCC #3 to reset its permanent inverter lock. Where TCC #3 is defined as the Head End Power Inverter. A TRUE value indicates that the LCC would like the TCC to reset its permanent inverter lock. TCC Blower Low Speed Acknowledge: A TRUE value indicates that the TCC low speed blower contactor is in the closed position as indicated by the contractor's feedback. A TRUE value indicates that the TCC has had several minor faults that have persisted. The condition has not been corrected so the TCC is now locked and will not create torque. (#ASG=1) A TRUE value indicates that the TCC associated with the #1 Truck has had several minor faults that have persisted. The condition has not been corrected so the TCC is now locked and will not create torque. (#ASG=1) A TRUE value indicates that the TCC associated with the #2 Truck has had several minor faults that have persisted. The condition has not been corrected so the TCC is now locked and will not create torque. (#ASG=1) A TRUE value indicates that the primary TCC associated with HEP has had several minor faults that have persisted. The condition has not been corrected so the TCC is now locked and will not create torque. SIGNAL DESCRIPTIONS B-91

T1LT< T1LT> T1LtLV1 T1LtLV2 T1LtoLV T1Maj T1Min T1Mon T1MxRPM T1N+dN T1N+dN1 T1N+dN2 T1OpCkV T1PhaA1 T1PhaA2 T1PhasA T1PMAir

T1PMRF T1PMSF T1PMT1 T1PMT2 T1PMT3 T1PMTF T1Pr T1PreCA

&SIG_IO_STATE(OP_MODE_LT) A TRUE value indicates that the TCC is in the load test mode. &SIG_IO_STATE(OP_MODE_LT) A TRUE value indicates that the LCC is requesting a power mode. &ANA_IN_SLOW(TLTLV) TCC output line-to-line voltage - Volts RMS - as calculated by the ASG for TCC #1. First utilized on Platform Phase2 for AC traction motor temperature simulation &ANA_IN_SLOW(TLTLV) TCC output line-to-line voltage - Volts RMS - as calculated by the ASG for TCC #2. First utilized on Platform Phase2 for AC traction motor temperature simulation &ANA_IN_SLOW(TLTOLV) TCC output line-to-line voltage - Volts RMS - as calculated by the ASG on a per inverter basis. First utilized on Platform Phase2 for AC traction motor temperature simulation &ANA_IN_SLOW(TMAJ[0]) TCC Software Major Revision &DISCRETE_OUT(TMIN) Current Time: Minutes &DISCRETE_OUT(TMON) Current Date: Month &ANA_IN_SLOW(MAX_TRUCK_R The maximum motor rpm signal for truck #1 PM[0]) &ANA_OUT(TN+DN[0]) The maximum motor speed that TCC should allow, regardless of the torque reference. &ANA_OUT(TN+DN) (#ASG=1) The maximum motor speed that TCC #1 should allow, regardless of the torque reference. &ANA_OUT(TN+DN) (#ASG=1) The maximum motor speed that TCC #2 should allow, regardless of the torque reference. &ANA_OUT(TOPCKV[0]) Open Circuit DC Link Voltage: The estimated open circuit DC link voltage given the field current and engine speed. &ANA_IN_SLOW(TPHAA) TCC output phase current - Amps RMS - as calculated by the ASG for TCC#1. First utilized on Platform Phase2 for AC traction motor temperature simulation &ANA_IN_SLOW(TPHAA) TCC output phase current - Amps RMS - as calculated by the ASG for TCC#2. First utilized on Platform Phase2 for AC traction motor temperature simulation &ANA_IN_SLOW(TPHASA) TCC output phase current - Amps RMS - as calculated by the ASG on a per inverter basis. First utilized on Platform Phase2 for AC traction motor temperature simulation &ANA_OUT(TPMAIR) The engine air inlet temperature as measured by EMDEC. This is sent from EMDEC via serial link and passed onto the ASGs as representative temperature of TCC phase module cooling air. To be changed later when the existing TM air probe is moved. 13-Mar-9 &ANA_IN_SLOW(TPMR[0]) Phase module #1 temperature. &ANA_IN_SLOW(TPMS[0]) Phase module #2 temperature. &ANA_IN_SLOW(TPMT) (#ASG=1) Phase module temperature 1, associated with the #1 Truck inverter (TCC1). &ANA_IN_SLOW(TPMT) (#ASG=1) Phase module temperature 2, associated with the #1 Truck inverter (TCC1). &ANA_IN_SLOW(TPMT) (#ASG=1) Phase module temperature 3, associated with the #1 Truck inverter (TCC1). &ANA_IN_SLOW(TPMT[0]) Phase module #3 temperature. &tcc_power_fb[0] TCC1PWR - &tcc_power_fb[0] &SIG_IO_STATE(TPRECA) A TRUE value indicates that the Pre-charge Switch Test has passed. SIGNAL DESCRIPTIONS B-92

T1PrLm T1PrRef T1Pwr< T1Pwr> T1PwrA1 T1PwrA2 T1PwrA3 T1PwrR1 T1PwrR2 T1PwrR3 T1R0Ack T1R0Req T1R1Ack T1R1Lft T1R1Req T1R1Rgt T1R2Lft T1R2Rgt T1RAck

&tcc_power_limit[0] &rated_tcc_power_reference[0] &SIG_IO_STATE(OP_MODE_PW R) &SIG_IO_STATE(OP_MODE_PW R) &SIG_IO_STATE(OP_MODE_PW R) &SIG_IO_STATE(OP_MODE_PW R) &SIG_IO_STATE(OP_MODE_PW R) &SIG_IO_STATE(OP_MODE_PW R) &SIG_IO_STATE(OP_MODE_PW R) &SIG_IO_STATE(OP_MODE_PW R) &SIG_IO_STATE(RES_STEP_ZE R) &SIG_IO_STATE(RES_STEP_ZE R) &SIG_IO_STATE(RES_STEP_ON E) &SIG_IO_STATE(TRLFT)

TCC1PWR_LIM - &tcc_power_limit[0] TCC1PWR_REF - &rated_tcc_power_reference[0] A TRUE value indicates that the TCC is in the power mode. A TRUE value indicates that the LCC is requesting a power mode. (#ASG=1) A TRUE value indicates that the TCC1 is in the power mode. (#ASG=1) A TRUE value indicates that the TCC2 is in the power mode. (#ASG=1) A TRUE value indicates that the TCC3 is in the power mode. (#ASG=1) A TRUE value indicates that the LCC is requesting a power mode for TCC #1. (Where TCC #1 is the inverter associated with TRUCK #1) (#ASG=1) A TRUE value indicates that the LCC is requesting a power mode for TCC #2. (Where TCC #2 is the inverter associated with TRUCK #2) (#ASG=1) A TRUE value indicates that the LCC is requesting a power mode for TCC #3. (Where TCC #3 is the inverter associated with Head End Power.) Resistance Step Zero Acknowledge: Indicates that the TCC is ready for the LCC to change to resistance step zero. Resistance Step Zero Request: Indicates that the LCC would like to be in resistance step zero.

Resistance Step One Acknowledge: Indicates that the TCC is ready for the LCC to change to resistance step one. A TRUE value indicates that the presence of the 3rd rail has been detected at the #1 Truck Left Side. &SIG_IO_STATE(RES_STEP_ON Resistance Step One Request: Indicates that the LCC would like to be in resistance step one. E) &SIG_IO_STATE(TRRGT) A TRUE value indicates that the presence of the 3rd rail has been detected at the #1 Truck Right Side. &SIG_IO_STATE(TRLFT) A TRUE value indicates that the presence of the 3rd rail has been detected at the #2 Truck Left Side. &SIG_IO_STATE(TRRGT) A TRUE value indicates that the presence of the 3rd rail has been detected at the #2 Truck Right Side. &DISCRETE_IN(TRACK) Resistance Step Acknowledge: Indicates that the TCC is ready for the LCC to change to the indicated resistance step.


T1RBkR1

&SIG_IO_STATE(TRBKR)

T1RBkR2

&SIG_IO_STATE(TRBKR)

T1RdrF> T1RefSp

&SIG_IO_STATE(TRDRF) &ANA_OUT(TREFSP[0])

T1RlAck

&SIG_IO_STATE(ROLLBACK_RE Q) &SIG_IO_STATE(TRLACK)

T1RlAck T1RnAck

T1Roll> T1Roll1

&SIG_IO_STATE(RES_STEP_NO N) &SIG_IO_STATE(RES_STEP_NO N) &SIG_IO_STATE(TROLL) &SIG_IO_STATE(TROLL)

T1Roll2

&SIG_IO_STATE(TROLL)

T1RolRq T1RPM1

&SIG_IO_STATE(ROLLBACK_RE Q) &ANA_IN_SLOW(TRPM[0])

T1RPM2

&ANA_IN_SLOW(TRPM[1])

T1RPM3


T1RPM4

&ANA_IN_SLOW(TRPM)

T1RRPM1 T1RRPM2 T1RRPM3

&ANA_IN_SLOW(TRRPM[0]) &ANA_IN_SLOW(TRRPM[1]) &ANA_IN_SLOW(TRRPM[2])

T1RnReq

(#ASG=1) TCC #1Rollback Mode Request: A value of TRUE indicates to TCC #1 that the LCC would like to transfer to rollback mode. (#ASG=1) TCC #2 Rollback Mode Request: A value of TRUE indicates to TCC #2 that the LCC would like to transfer to rollback mode. A TRUE value indicates that the radar signal used by the LCC is not correct. The minimum corrected speed of all 6 motor during power operation and the maximum of all six motor during brake operation. Rollback Mode Acknowledge: Indicates that the TCC is ready for the LCC to change to rollback mode. (#ASG=1) Rollback Mode Acknowledge: Indicates that the TCC2 is ready for the LCC to change to rollback mode. Resistance Step None Acknowledge: Indicates that the TCC has acknowledged the "nonbrake" resistance step. Resistance Step None Request: Indicates that the LCC would like to be in resistance step none. This is done in non-brake modes since the TCCs want to see it. Rollback Mode: A TRUE value indicates that the LCC is in the rollback mode. (#ASG=1) TCC1 Rollback Mode: A TRUE value indicates to TCC #1 that the LCC is in the rollback mode. (#ASG=1) TCC2 Rollback Mode: A TRUE value indicates to TCC #1 that the LCC is in the rollback mode. Rollback Mode Request: A value of TRUE indicates that the LCC would like to transfer to rollback mode. Traction Motor #1 in Truck Corrected RPM: The traction motor rpm corrected to reflect the speed of traction motor #1 if it had the same size wheels the wheels on the motor generating the reference motor speed. Traction Motor #2 in Truck Corrected RPM: The traction motor rpm corrected to reflect the speed of traction motor #2 if it had the same size wheels the wheels on the motor generating the reference motor speed. Traction Motor #3 in Truck Corrected RPM: The traction motor rpm corrected to reflect the speed of traction motor #3 if it had the same size wheels the wheels on the motor generating the reference motor speed. Traction Motor #4 Corrected RPM: The traction motor rpm corrected to reflect the speed of traction motor #4 if it had the same size wheels the wheels on the motor generating the reference motor speed. Traction Motor #1 in the truck RPM Uncorrected: The raw motor rpm. Traction Motor #2 in the truck RPM Uncorrected: The raw motor rpm. Traction Motor #3 in the truck RPM Uncorrected: The raw motor rpm.


T1RRPM4 T1RSAct T1RSRq T1SbsF T1Sec T1SnbT1 T1SnbT2 T1SnbT3 T1SnubF T1Soft< T1Spot> T1TCBRq

&ANA_IN_SLOW(TRRPM) &DISCRETE_OUT(TRSACT) &DISCRETE_OUT(TRSRQ) &ANA_IN_SLOW(TSBS[0]) &DISCRETE_OUT(TSEC) &ANA_IN_SLOW(TSNBT) &ANA_IN_SLOW(TSNBT) &ANA_IN_SLOW(TSNBT) &ANA_IN_SLOW(TSNUB[0]) &SIG_IO_STATE(TSOFT) &SIG_IO_STATE(TSPOT) &DISCRETE_IN(TTCBRQ[0])

T1TCCBl

&SIG_IO_STATE(TTCCBL)

T1TCCF T1TCCT1 T1TCCT2 T1TCCT3 T1TCHA>

&ANA_IN_SLOW(TTCC[0]) &ANA_IN_SLOW(TTCCT) &ANA_IN_SLOW(TTCCT) &ANA_IN_SLOW(TTCCT) &SIG_IO_STATE(TTCHA)

T1TCHL<

&SIG_IO_STATE(TTCHL)

T1TCLLo

&SIG_IO_STATE(TTCLLO)

T1TCOF<

&SIG_IO_STATE(TTCOF)

T1TCOf> T1TCOT<

&SIG_IO_STATE(TTCOF) &SIG_IO_STATE(TTCOT)

T1TM1F T1TM1S<

&ANA_IN_SLOW(TTM[0]) &SIG_IO_STATE(TTMS)

Traction Motor #4 RPM Uncorrected: The raw motor rpm. Actual Grid Resistance Step: Indicates which grid resistance step the LCC is currently in. Resistance Step Request: Indicates which grid resistance step the LCC would like to be in. Sibas computer temperature. Current Time: Second (#ASG=1) Snubber resistor temperature, associated with the #1 Truck inverter (TCC1). (#ASG=1) Snubber resistor temperature, associated with the #2 Truck inverter (TCC2). (#ASG=1) Snubber resistor temperature, associated with the #3/HEP inverter (TCC3). Snubber resistor temperature. A TRUE value indicates that the TCC has fired a soft crowbar. Spotter Request: A value of TRUE indicated that the TCC should start spotter operation. TCC Blower Request: Indicates the level of TCC blower cooling air flow being request by the TCC. A value of 0 indicated that no cooling air flow is required. A value of 1 indicates the minimum cooling air flow. A value of 15 indicates the maximum coolin TCC Blower Status info sent to Siemens. A "0" value indicates No Blower Fault detected. A "1" value indicates that the LCC has detected a fault that renders the blower supplying air to the TCC unable to provide cooling air. TCC cabinet temperature. TCC cabinet temperature #1. TCC cabinet temperature #2. TCC cabinet temperature #3. TCC Heater Acknowledge: This is simply an acknowledge of the request made to the LCC. This acknowledge is not based on the LCC's mode or the ability to pick up the Heater contactor. This is the request from the TCC to turn on the heater contactor if the engine speed is in governor 3 or less. There is no need to alter performance, or limit, or speed up the engine for this request. This is the less cold request from the inverter. A TRUE value indicates that the LCC is setting the TCC blower speed to low speed although the TCC is requesting high speed. The LCC is required to take this action during throttle increases so that the blower does not overspeed. This input will indicate that a TCC wishes the LCC to drop out VPC, and thus 74v to the TCC's ASG due to excessive Sibas computer temperature. A TRUE indicates that the Sibas wants to be shut off. TCC Off: A TRUE value indicates that the TCC's power supply has been turned off by the LCC. A TRUE value indicates that the phase modules are hot and the LCC should increase engine speed to throttle 5 to increase the cooling air flow. Traction motor #1 in the truck motor stator temperature. A TRUE value indicates that the speed pickup for Traction Motor #1 in the truck is failed. SIGNAL DESCRIPTIONS B-95

T1TM1Tm T1TM24R

&ANA_OUT(TTMTM) &ANA_OUT(TTMR[0])

T1TM2F T1TM2S< T1TM2Tm T1TM3F T1TM3S< T1TM3Tm T1TM4S< T1TM4Tm T1TMAv1 T1TMAv2 T1TMAvT T1TMBRq

&ANA_IN_SLOW(TTM[1]) &SIG_IO_STATE(TTMS) &ANA_OUT(TTMTM) &ANA_IN_SLOW(TTM[2]) &SIG_IO_STATE(TTMS) &ANA_OUT(TTMTM) &SIG_IO_STATE(TTMS) &ANA_OUT(TTMTM) &ANA_OUT(TTMAV) &ANA_OUT(TTMAV) &ANA_OUT(TTMAVT) &DISCRETE_IN(TTMBRQ[0])

T1TmClF T1TMOT<

&ANA_OUT(TTMCL[0]) &SIG_IO_STATE(TTMOT)

T1TnMd>

&SIG_IO_STATE(TTNMD)

T1TnRe<

&SIG_IO_STATE(TTNRE)

T1Tor F

&ANA_IN_SLOW(TTOR_F[0])

T1Tor R T1Tor R

&ANA_OUT(TTOR_R[0]) &ANA_OUT(TTOR_R)

T1TorFB

&ANA_IN_SLOW(TTORFB)

T1Tr1Hi

&SIG_IO_STATE(TTRHI)

The simulated temperature of the #1 traction motor. Speed of motor 3 if this signal is available. If the this signal is not available use the following selection order until a signal is available: TM3, TM4, TM2, TM5. TM1, TM6. Traction motor #2 in the truck motor stator temperature. A TRUE value indicates that the speed pickup for Traction Motor #2 in the truck is failed. The simulated temperature of the #2 traction motor. Traction motor #3 in the truck motor stator temperature. A TRUE value indicates that the speed pickup for Traction Motor #3 in the truck is failed. The simulated temperature of the #3 traction motor. A TRUE value indicates that the speed pickup for Traction Motor #4 in the truck is failed. The simulated temperature of the #4 traction motor. The average of all the simulated temperatures for truck #1. The average of all the simulated temperatures for truck #2. The average of all the simulated temperatures for the truck indicated by the index array. TM Blower Request: Indicates the level of TM blower cooling air flow being request by the TCC. A value of 0 indicated that no cooling air flow is required. A value of 1 indicates the minimum cooling air flow. A value of 15 indicates the maximum cooling The temperature of the traction motor cooling air. A TRUE value indicates that the traction motors are hot and the LCC should increase engine speed to throttle 5 to increase the cooling air flow. Starting on the Type B serial link the ASG will send a bit indicating that it is in tunnel mode. This bit must then be fed to the adjacent inverter. Starting on the Type B serial link, the ASG will send the LCC a bit indicating that it has entered tunnel operation. The per motor torque created by the traction motors. A positive number represents a propelling torque while a negative number represents a braking torque. Inverter Torque Reference: The torque reference requested by the LCC. (#ASG=1 & 4 AXLE!) TCC1 Inverter Torque Reference: The torque reference requested for TCC #1 by the LCC. The scale factor takes into account the number of axles since the telegram deals in motor torque. (#ASG=1, & 4 AXLE!) The per motor torque created by the traction motors associated with Truck #1/TCC1. A positive number represents a propelling torque while a negative number represents a braking torque. Truck #1 Blower High Speed Acknowledge: A TRUE value indicates that the Truck #1 high speed blower contactor is in the closed position as indicated by the contactor's feedback. SIGNAL DESCRIPTIONS B-96

T1Tr1Lo

&SIG_IO_STATE(TTRLO)

T1Tr2Hi

&SIG_IO_STATE(TTRHI)

T1Tr2Lo

&SIG_IO_STATE(TTRLO)

T1TRK1T T1TRK2T T1TSELF T1TSSel

&ANA_OUT(TTRKT) &ANA_OUT(TTRKT) &ANA_IN_SLOW(TTSEL) &DISCRETE_IN(TTSSEL)

Truck #1 Blower Low Speed Acknowledge: A TRUE value indicates that the Truck #1 low speed blower contactor is in the closed position as indicated by the contactor's feedback. Truck #2 Blower High Speed Acknowledge: A TRUE value indicates that the Truck #2 high speed blower contactor is in the closed position as indicated by the contactor's feedback. Truck #2 Blower Low Speed Acknowledge: A TRUE value indicates that the Truck #2 low speed blower contactor is in the closed position as indicated by the contactor's feedback. The maximum of all the simulated temperatures in truck #1. The maximum of all the simulated temperatures in truck #2. The temperature of the device indicated by TCC_TEMPERATURE_SELECT. The value of this byte indicates which temperature is contained in this data pack. 0 = 1st motor in truck 1 = 2nd motor in truck 2 = 3rd motor in truck 3 = phase module 1 4 = phase module 2 5 = phase module 3 6 = SIBAS computer

T1UnitN T1UVRf>

&ANA_OUT(TUNITN[0]) &SIG_IO_STATE(TUVRF)

T1VRed<

&SIG_IO_STATE(TVRED)

T1VTbl

&DISCRETE_OUT(TVTBL)

7 = snubber resisto Analog representation of the unit number. Undervoltage Protection Relief: A TRUE value indicates that the TCC should open its undervoltage protection tolerance. Used during grid resistance step changes. DC Link Voltage Reduction Request: A TRUE value indicates that the voltage reference should be limited to 2450 Volts. Voltage Schedule: The value indicate the voltage schedule that is in use, updated 18-Dec-97:

T1WDiai T1XFMR1 T1XFMR2 T1XFMR3

&ANA_OUT(TWDIA) &ANA_IN_SLOW(TXFMR) &ANA_IN_SLOW(TXFMR) &ANA_IN_SLOW(TXFMR)

0== 5000THP 2 == 6000THP 1== <5000THP (4300THP) The average wheel diameter of all the wheels on the #1 Truck. HEP Transformer Temperature 1. HEP Transformer Temperature 2. HEP Transformer Temperature 3. SIGNAL DESCRIPTIONS B-97

T1Yr T2%Adh T2
T2
&DISCRETE_OUT(TYR) &creep_control_adhesion[1] &DISCRETE_IN(FAULT_CODE[1] ) &DISCRETE_IN(FAULT_CLASS[1 ]) &display_ipm_control_mode[1]

T2
&ipm_test_state[1]

T2_In T26LIM<

&tcc_input_buffer[1] &SIG_IO_STATE(TLIM)

T27LIM<

&SIG_IO_STATE(TLIM)

T2Addr

&DISCRETE_IN(TADDR[1])

T2
Current Date: Year This is the percent adhesion that is being seen by truck #2. TCC 2 fault code TCC 2 fault class TCC #2 IPM control mode. (00=IPM uncontrolled, 01=IPM controlled by TCC1, 11=IPM controlled by TCC2) TCC #2 protection state. (00=Test not requested, 01=Teis in progress, 10=Test passed, 11=Test Failed) tcc2_in - tcc_input_buffer[1] A true values indicates that the LCC should increase the engine speed two notches in excess of the traction and voltage, or if in TH8 reduce the traction and voltage throttle to TN 6 A True value indicates that the LCC should increase the engine speed one notch in excess of the traction and voltage throttle, or if in TH 8 reduce traction and voltage to Th 7 The value of this field is the address of the source of the serial data pack. 0001 = Sent by TCC #1 0010 = Sent by TCC #2

T2AddrA

&DISCRETE_OUT(TADDRA)

other = Undefined Designation Address: 0001 = TCC #1

T2AdHD> T2AdPMT T2AdSo>

&SIG_IO_STATE(TADHD) &ANA_OUT(TADPMT) &SIG_IO_STATE(TADSO)

T2AdSPF

&SIG_IO_STATE(TADSPF)

T2ASnbF

&ANA_OUT(TASNB[1])

T2ATCCF

&ANA_OUT(TATCC[1])

0010 = TCC #2 Adjacent Soft Crowbar: A TRUE value indicates that the other TCC has fired a soft crowbar. The maximum phase module temperature for the adjacent inverter. Adjacent Hard Crowbar Fired: A TRUE value indicates that the other TCC has fired a hard crowbar. TRUE value indicates ALL speed probes on adjacent inverter have failed - or communications failure exists between adjacent inverter and LCC Adjacent Snubber Resistor Temperature: The snubber resistor temperature from the other TCC. Adjacent TCC Cabinet Temperature: The TCC cabinet temperature from the other TCC.


T2AType

&DISCRETE_OUT(TATYPE)

T2AvRPM T2BHig< T2BlDta

&avg_truck_rpm[1] &SIG_IO_STATE(TBHIG) &DISCRETE_OUT(TBLDTA)

T2BLow< T2BlwA T2Blwr> T2Brk< T2Brk> T2BSt> T2Busy

&SIG_IO_STATE(TBLOW) &ANA_IN_SLOW(TBLWA[1]) &SIG_IO_STATE(TBLWR) &SIG_IO_STATE(TBRK) &SIG_IO_STATE(TBRK) &SIG_IO_STATE(TBST) &DISCRETE_IN(TBUSY[1])

T2BusyA

&DISCRETE_OUT(TBUSYA)

T2BWS> T2CAV>

&SIG_IO_STATE(TBWS) &SIG_IO_STATE(TCAV)

T2CBTA< T2CBTR< T2CBTS> T2CFRq> T2CLSU<

&SIG_IO_STATE(TCBTA) &SIG_IO_STATE(TCBTR) &SIG_IO_STATE(TCBTS) &SIG_IO_STATE(TCFRQ) &SIG_IO_STATE(TCLSU)

T2Cnfg> T2CTA< T2CTC1> T2CTC2> T2CTR< T2CTRq> T2Day T2DCL V T2DCL>

&SIG_IO_STATE(TCNFG) &SIG_IO_STATE(TCTA) &SIG_IO_STATE(TCTC) &SIG_IO_STATE(TCTC) &SIG_IO_STATE(TCTR) &SIG_IO_STATE(TCTRQ) &DISCRETE_OUT(TDAY) &ANA_OUT(TDCL_V[1]) &SIG_IO_STATE(TDCL)

4 bit signal to indicate the type of A-Type locomotive - be it SD70MAC, GT46MAC, GT46PAC, etc. The average motor rpm signal for truck #2 A TRUE value indicates that the TCC would like the TCC blower set to high speed. FDCCB ENABLE: A TRUE value indicates that the FDCCB (Fast DC Breaker) is to be enabled (closed). This signal is needed by the TCC Model and is associated with 3rd rail, Electric Mode, operation. A TRUE value indicates that the TCC would like the TCC blower set to low speed. TCC blower current in one phase. A bit telling the inverter whether or not the TCC blower is following the TCC request. A TRUE value indicates that the TCC is in the brake mode. A TRUE value indicates that the LCC is requesting a brake mode. A bit sent to the inverter indicating if the clean air blower is following the ASG request. The number received should one higher than the value sent to the TCC the previous loop. A time delay must be instituted to allow the TCC to respond. Busy Check: The TCCs will add one to this signal and then send it back on a serial input. The LCC should increase this number and then repeat the process. Failure of the TCC to respond properly indicates a failed communications link. A TRUE value indicates that the LCC desires the TCC to activates its wheel slip system. A TRUE value indicates that companion alternator output is occurring. This is detected by the presence of a companion alternator frequency. A TRUE value indicates that the TCC is ready to perform a crowbar test. A TRUE value indicates that the crowbar test was successful. A TRUE value indicates that the TCCs should setup for a crowbar test. A TRUE value indicates that the TCCs should fire the crowbar for the capacitor test. This input when TRUE will request an engine speedup equivalent to a governor 3 speed for inverter cooling. Truck number 2 inverter HEP configuration. A TRUE value indicates that the TCC is ready to perform a capacitor test. A TRUE value indicates that TCC #1 should perform a crowbar test. A TRUE value indicates that TCC #2 should perform a crowbar test. A TRUE value indicates that the capacitor test was successful. A TRUE value indicates that the TCCs should setup for a capacitor test. Current Time: Day The main alternator DC output voltage. A TRUE value indicates that the DC link in the open position. SIGNAL DESCRIPTIONS B-99

T2DCLV T2DirF< T2DirF> T2DirR< T2DirR> T2Dis1>

&ANA_IN_SLOW(TDCLV[1]) &SIG_IO_STATE(TDIRF) &SIG_IO_STATE(TDIRF) &SIG_IO_STATE(TDIRR) &SIG_IO_STATE(TDIRR) &SIG_IO_STATE(TDIS)

T2Dis2>

&SIG_IO_STATE(TDIS)

T2ElBrk

&SIG_IO_STATE(TELBRK[1])

T2FClas

&DISCRETE_IN(TFCLAS[1])

DC link voltage as measured by the TCC from the isolated side of the DC link. A TRUE value indicates that the TCC is setup for the forward direction. A TRUE value indicates a request for operation in the forward direction. A TRUE value indicates that the TCC is setup for the reverse direction. A TRUE value indicates a request for operation in the reverse direction. A TRUE value indicates that TCC #1 is Cut-In. Where TCC #1 is defined as the inverter associated with TRUCK #1. A TRUE value indicates that TCC #2 is Cut-In. Where TCC #2 is defined as the inverter associated with TRUCK #2. Indication to the inverters whether or not the electric parking brake is applied. a True value indicates applied. The class of TCC fault. 80h = A Class Fault 40h = B Class Fault 20h = C Class Fault 10h = D Class Fault 08h = E Class Fault

T2FCode T2Freq

&DISCRETE_IN(TFCODE[1]) &ANA_IN_SLOW(TFREQ)

T2GovRq

&DISCRETE_OUT(TGOVRQ)

T2GTO< T2GTOA>

&SIG_IO_STATE(TGTO) &SIG_IO_STATE(TGTOA)

T2Hard< T2HiAk>

&SIG_IO_STATE(THARD) &SIG_IO_STATE(THIAK)

T2Hr

&DISCRETE_OUT(THR)

00h = No Fault Class A code representing the current fault condition. TCC output fundamental frequency - hertz - as calculated by the ASG on a per inverter basis. First utilized on Platform Phase2 for AC traction motor temperature simulation Inverter Governor Request: Nibble representation of the current governor request. 0 = Idle,1= throttle 1, 2 = throttle 2, ... A TRUE value indicates the TCC would like the power supply turned on. GTO Power Supply Acknowledge: A TRUE value indicates that the GTO power supply contactor is in the closed position as indicated by the contactor's feedback. A TRUE value indicates that the inverter has fired a hard crowbar. TCC Blower High Speed Acknowledge: A TRUE value indicates that the TCC high speed blower contactor is in the closed position as indicated by the contactor's feedback. Current Time: Hours SIGNAL DESCRIPTIONS B-100

T2HrtL>

&SIG_IO_STATE(THRTL)

T2IGV<

&SIG_IO_STATE(TIGV)

T2IGV> T2ImmO>

&SIG_IO_STATE(TIGV) &SIG_IO_STATE(TIMMO)

T2InvH<

&SIG_IO_STATE(TINVH)

T2IPS>

&SIG_IO_STATE(TIPS)

T2LCCIO T2LdRq

&SIG_IO_STATE(TLCCIO) &DISCRETE_OUT(TLDRQ)

T2LkRst T2LoAk> T2Lock< T2LT< T2LT> T2LtoLV T2Maj T2Min T2Mon T2MxRPM T2N+dN T2OpCkV T2PhasA

This is the acknowledge of the TCC HEATER LOW REQUEST signal. This is only an acknowledge of the request and does not indicate the LCC's ability to pick up the Heater contactor. A TRUE value indicates that the TCC feels warm and would like the cooling air to be restored to normal. A TRUE value indicates that the LCC has opened the inlet guide vane ( AKA shutter ). A TRUE value indicates that the LCC is exiting power or brake without delay. The LCC will no longer control the DC link voltage so the TCCs should take the actions necessary to avoid undesired consequences. A TRUE value indicates that the TCC feels cold and would like its heater turned on. This is the heater demand that -requires- the engine speed to be limited/increased. This indicates the coldest level for the inverter. This output indicates the status of the IPS pressure switch. A FALSE indicates that there is a locomotive air brake application and a TRUE indicates no air brakes applied. A TRUE value indicates that locomotive control computer is in the process of testing contactors. Inverter Load Request: Nibble representation of the current load request.

0 = Idle,1= throttle 1, 2 = throttle 2, ... &SIG_IO_STATE(TLKRST[1]) A TRUE value indicates that the LCC would like the TCC to reset its permanent inverter lock. &SIG_IO_STATE(TLOAK) TCC Blower Low Speed Acknowledge: A TRUE value indicates that the TCC low speed blower contactor is in the closed position as indicated by the contactor's feedback. &SIG_IO_STATE(TLOCK) A TRUE value indicates that the TCC has had several minor faults that have persisted. The condition has not been corrected so the TCC is now locked and will not create torque. &SIG_IO_STATE(TLT) A TRUE value indicates that the TCC is in the load test mode. &SIG_IO_STATE(TLT) A TRUE value indicates that the LCC is requesting a power mode. &ANA_IN_SLOW(TLTOLV) TCC output line-to-line voltage - Volts RMS - as calculated by the ASG on a per inverter basis. First utilized on Platform Phase2 for AC traction motor temperature simulation &ANA_IN_SLOW(TMAJ[1]) TCC Software Major Revision &DISCRETE_OUT(TMIN) Current Time: Minutes &DISCRETE_OUT(TMON) Current Time: Month &ANA_IN_SLOW(MAX_TRUCK_R The maximum motor rpm signal for truck #2 PM[1]) &ANA_OUT(TN+DN[1]) The maximum motor speed that TCC should allow, regardless of the torque reference. &ANA_OUT(TOPCKV[1]) Open Circuit DC Link Voltage: The estimated open circuit DC link voltage given the field current and engine speed. &ANA_IN_SLOW(TPHASA) TCC output phase current - Amps RMS - as calculated by the ASG on a per inverter basis. First utilized on Platform Phase2 for AC traction motor temperature simulation SIGNAL DESCRIPTIONS B-101

T2PMAir

&ANA_OUT(TPMAIR)

T2PMRF T2PMSF T2PMTF T2Pr T2PrLm T2PrRef T2Pwr< T2Pwr> T2R0Ack

&ANA_IN_SLOW(TPMR[1]) &ANA_IN_SLOW(TPMS[1]) &ANA_IN_SLOW(TPMT[1]) &tcc_power_fb[1] &tcc_power_limit[1] &rated_tcc_power_reference[1] &SIG_IO_STATE(TPWR) &SIG_IO_STATE(TPWR) &SIG_IO_STATE(TRACK[0])

T2R0Req T2R1Ack

&SIG_IO_STATE(TRREQ[0]) &SIG_IO_STATE(TRACK[1])

T2R1Req T2RAck

&SIG_IO_STATE(TRREQ[1]) &DISCRETE_IN(TRACK)

T2RdrF> T2RefSp

&SIG_IO_STATE(TRDRF) &ANA_OUT(TREFSP[1])

T2RlAck

&SIG_IO_STATE(TRLACK)

T2RnAck

&SIG_IO_STATE(TRNACK)

T2RnReq

&SIG_IO_STATE(TRNREQ)

T2Roll> T2RolRq

&SIG_IO_STATE(TROLL) &SIG_IO_STATE(TROLRQ)

T2RPM1


T2RPM2


The engine air inlet temperature as measured by EMDEC. This is sent from EMDEC via serial link and passed onto the ASGs as representative temperature of TCC phase module cooling air. To be changed later when the existing TM air probe is moved. 13-Mar-9 Phase module #1 temperature. Phase module #2 temperature. Phase module #3 temperature. TCC2PWR - &tcc_power_fb[1] TCC2PWR_LIM - &tcc_power_limit[1] TCC2PWR_REF - &rated_tcc_power_reference[1] A TRUE value indicates that the TCC is in the power mode. A TRUE value indicates that the LCC is requesting a power mode. Resistance Step Zero Acknowledge: Indicates that the TCC is ready for the LCC to change to resistance step zero. Resistance Step Zero Request: Indicates that the LCC would like to be in resistance step zero. Resistance Step One Acknowledge: Indicates that the TCC is ready for the LCC to change to resistance step one. Resistance Step One Request: Indicates that the LCC would like to be in resistance step one. Resistance Step Acknowledge: Indicates that the TCC is ready for the LCC to change to the indicated resistance step. A TRUE value indicates that the radar signal used by the LCC is not correct. The minimum corrected speed of all 6 motor during power operation and the maximum of all six motor during brake operation. Rollback Mode Acknowledge: Indicates that the TCC is ready for the LCC to change to rollback mode. Resistance Step None Acknowledge: Indicates that the TCC has acknowledged the "nonbrake" resistance step. Resistance Step None Request: Indicates that the LCC would like to be in resistance step none. This is done in non-brake modes since the TCCs want to see it. Rollback Mode: A TRUE value indicates that the LCC is in the rollback mode. Rollback Mode Request: A value of TRUE indicates that the LCC would like to transfer to rollback mode. Traction Motor #1 in Truck Corrected RPM: The traction motor rpm corrected to reflect the speed of traction motor #1 if it had the same size wheels the wheels on the motor generating the reference motor speed. Traction Motor #2 in Truck Corrected RPM: The traction motor rpm corrected to reflect the speed of traction motor #2 if it had the same size wheels the wheels on the motor generating the reference motor speed. SIGNAL DESCRIPTIONS B-102

T2RPM3


T2RRPM1 T2RRPM2 T2RRPM3 T2RSAct T2RSRq T2SbsF T2Sec T2SnubF T2Soft< T2Spot> T2TCBRq

&ANA_IN_SLOW(TRRPM[3]) &ANA_IN_SLOW(TRRPM[4]) &ANA_IN_SLOW(TRRPM[5]) &DISCRETE_OUT(TRSACT) &DISCRETE_OUT(TRSRQ) &ANA_IN_SLOW(TSBS[1]) &DISCRETE_OUT(TSEC) &ANA_IN_SLOW(TSNUB[1]) &SIG_IO_STATE(TSOFT) &SIG_IO_STATE(TSPOT) &DISCRETE_IN(TTCBRQ[1])

T2TCCF T2TCHA>

&ANA_IN_SLOW(TTCC[1]) &SIG_IO_STATE(TTCHA)

T2TCHL<

&SIG_IO_STATE(TTCHL)

T2TCLLo

&SIG_IO_STATE(TTCLLO)

T2TCOF<

&SIG_IO_STATE(TTCOF)

T2TCOf> T2TCOT<

&SIG_IO_STATE(TTCOF) &SIG_IO_STATE(TTCOT)

T2TM1F T2TM1S< T2TM24R

&ANA_IN_SLOW(TTM[3]) &SIG_IO_STATE(TTMS) &ANA_OUT(TTMR[1])

Traction Motor #3 in Truck Corrected RPM: The traction motor rpm corrected to reflect the speed of traction motor #3 if it had the same size wheels the wheels on the motor generating the reference motor speed. Traction Motor #1 in the truck RPM Uncorrected: The raw motor rpm. Traction Motor #2 in the truck RPM Uncorrected: The raw motor rpm. Traction Motor #3 in the truck RPM Uncorrected: The raw motor rpm. Actual Grid Resistance Step: Indicates which grid resistance step the LCC is currently in. Resistance Step Request: Indicates which grid resistance step the LCC would like to be in. Sibas computer temperature. Current Time: Second Snubber resistor temperature. A TRUE value indicates that the TCC has fired a soft crowbar. Spotter Request: A value of TRUE indicated that the TCC should start spotter operation. TCC Blower Request: Indicates the level of TCC blower cooling air flow being request by the TCC. A value of 0 indicated that no cooling air flow is required. A value of 1 indicates the minimum cooling air flow. A value of 15 indicates the maximum coolin TCC cabinet temperature. TCC Heater Acknowledge: This is simply an acknowledge of the request made to the LCC. This acknowledge is not based on the LCC's mode or the ability to pick up the Heater contactor. This is the request from the TCC to turn on the heater contactor if the engine speed is in governor 3 or less. There is no need to alter performance, or limit, or speed up the engine for this request. This is the less cold request from the inverter. A TRUE value indicates that the LCC is setting the TCC blower speed to low speed although the TCC is requesting high speed. The LCC is required to take this action during throttle increases so that the blower does not overspeed. This input will indicate that a TCC wishes the LCC to drop out VPC, and thus 74v to the TCC's ASG due to excessive Sibas computer temperature. A TRUE indicates that the Sibas wants to be shut off. TCC Off: A TRUE value indicates that the TCC's power supply has been turned off by the LCC. A TRUE value indicates that the phase modules are hot and the LCC should increase engine speed to throttle 5 to increase the cooling air flow. Traction motor #1 in the truck motor stator temperature. A TRUE value indicates that the speed pickup for Traction Motor #1 in the truck is failed. Speed of motor 3 if this signal is available. If the this signal is not available use the following selection order until a signal is available: TM3, TM4, TM2, TM5. TM1, TM6. SIGNAL DESCRIPTIONS B-103

T2TM2F T2TM2S< T2TM3F T2TM3S< T2TMAv1 T2TMAvT T2TMBRq

&ANA_IN_SLOW(TTM[4]) &SIG_IO_STATE(TTMS) &ANA_IN_SLOW(TTM[5]) &SIG_IO_STATE(TTMS) &ANA_OUT(TTMAV) &ANA_OUT(TTMAVT) &DISCRETE_IN(TTMBRQ[1])

T2TmClF T2TMOT<

&ANA_OUT(TTMCL[1]) &SIG_IO_STATE(TTMOT)

T2TnMd>

&SIG_IO_STATE(TTNMD)

T2TnRe<

&SIG_IO_STATE(TTNRE)

T2Tor F

&ANA_IN_SLOW(TTOR_F[1])

T2Tor R T2TSELF T2TSSel

&ANA_OUT(TTOR_R[1]) &ANA_IN_SLOW(TTSEL) &DISCRETE_IN(TTSSEL)

Traction motor #2 in the truck motor stator temperature. A TRUE value indicates that the speed pickup for Traction Motor #2 in the truck is failed. Traction motor #3 in the truck motor stator temperature. A TRUE value indicates that the speed pickup for Traction Motor #3 in the truck is failed. The average of all the simulated temperatures for truck #1. The average of all the simulated temperatures for the truck indicated by the index array. TM Blower Request: Indicates the level of TM blower cooling air flow being request by the TCC. A value of 0 indicated that no cooling air flow is required. A value of 1 indicates the minimum cooling air flow. A value of 15 indicates the maximum cooling The temperature of the traction motor cooling air. A TRUE value indicates that the traction motors are hot and the LCC should increase engine speed to throttle 5 to increase the cooling air flow. Starting on the Type B serial link the ASG will send a bit indicating that it is in tunnel mode. This bit must then be fed to the adjacent inverter. Starting on the Type B serial link, the ASG will send the LCC a bit indicating that it has entered tunnel operation. The per motor torque created by the traction motors. A positive number represents a propelling torque while a negative number represents a braking torque. Inverter Torque Reference: The torque reference requested by the LCC. The temperature of the device indicated by TCC_TEMPERATURE_SELECT. The value of this byte indicates which temperature is contained in this data pack. 0 = 1st motor in truck 1 = 2nd motor in truck 2 = 3rd motor in truck 3 = phase module 1 4 = phase module 2 5 = phase module 3 6 = SIBAS computer 7 = snubber resisto


T2UnitN T2UVRf>

&ANA_OUT(TUNITN[1]) &SIG_IO_STATE(TUVRF)

T2VRed<

&SIG_IO_STATE(TVRED)

T2VTbl

&DISCRETE_OUT(TVTBL)

T2WDiai T2Yr TAv_WD1 TAv_WD2 Tb_St Tb_Su TbPrior Tbr_Stu TbrTank TbSdLb TbSdRb TbSpd TbSpd1 TbSpd2 TbSpdRf TC12HT>

&ANA_OUT(TWDIA) &DISCRETE_OUT(TYR) &truck_avg_wheel_diameter[0] &truck_avg_wheel_diameter[1] &turbo_charger_state &turbo_boost_su &tccb_priority_request &turbo_speed_feedback_status &turbo_speed_feedback_tank &ANA_IN_SLOW(TBSDLB) &ANA_IN_SLOW(TBSDRB) &ANA_IN_SLOW(TBSPD) &ANA_OUT(TBSPD[0]) &ANA_OUT(TBSPD[1]) &turbo_speed_power_reference &SIG_IO_STATE(TCC1HT)

TC1Bkr<

&SIG_IO_STATE(TC1BKR)

TC1CabF TC1PMRF TC1PMSF TC1PMTF TC1STAT TC2Bkr<

&tcc_cabinet_temperature[0] &phase_module_temperature[0] &phase_module_temperature[1] &phase_module_temperature[2] &tcc_torque_status[0] &SIG_IO_STATE(TC2BKR)

TC2CabF TC2PMRF

&tcc_cabinet_temperature[1] &phase_module_temperature[3]

Analog representation of the unit number. Undervoltage Protection Relief: A TRUE value indicates that the TCC should open its undervoltage protection tolerance. Used during grid resistance step changes. DC Link Voltage Reduction Request: A TRUE value indicates that the voltage reference should be limited to 2450 Volts. Voltage Schedule: The value indicate the voltage schedule that is in use, updated 18-Dec-97: 0== 5000THP 2 == 6000THP 1== <5000THP (4300THP) The average wheel diameter of all the wheels on the #2 Truck. Current Time: Year t_avg_whl_dia1 - &truck_avg_wheel_diameter[0] t_avg_whl_dia2 - &truck_avg_wheel_diameter[1] turbo_state - &turbo_charger_state tb_su - &turbo_boost_su tccb_prior - &tccb_priority_request turbo_status - &turbo_speed_feedback_status turbo_tank - &turbo_speed_feedback_tank Speed of the left bank turbo changer. Speed of the right bank turbo changer. Speed of the right bank turbo changer. The turbo speed. of the #1 turbo. The turbo speed. of the #2 turbo. turbo_s_p_rf - &turbo_speed_power_reference TCC #1 and #2 Heater Contactor: A TRUE value causes the contactor to close and the TCC heaters to be activated. TCC #1 Breakers Up: A TRUE value indicates that all the breaker placed in this string are in the closed position. TCC 1 cabinet temperature TCC 1 phase module temperature. TCC 1 phase module temperature TCC 1 phase module temperature Un-filtered regulation status for truck#1 TCC #2 Breakers Up: A TRUE value indicates that all the breaker placed in this string are in the closed position. TCC 2 cabinet temperature TCC 2 phase module temperature SIGNAL DESCRIPTIONS B-105

TC2PMSF TC2PMTF TC2STAT TCC1 A TCC1 A

&phase_module_temperature[4] &phase_module_temperature[5] &tcc_torque_status[1] &ANA_IN_SLOW(TCC1_A) &ANA_IN_SLOW(TCC1_A)

TCC1CB<

&SIG_IO_STATE(TCC1CB)

TCC1FC<

&SIG_IO_STATE(TCC1FC)

TCC1FC>


TCC1HT<

&SIG_IO_STATE(TCC1HT)

TCC1PWR TCC1SC<

&tcc_power_fb[0] &SIG_IO_STATE(TCC1SC)

TCC1SC>

&SIG_IO_STATE(TCC1SC)

TCC1SnF TCC2 A

&tcc_snubber_temperature[0] &ANA_IN_SLOW(TCC2_A)

TCC2 A

&ANA_IN_SLOW(TCC2_A)

TCC2FC<


TCC2FC>


TCC2HT<

&SIG_IO_STATE(TCC2HT)

TCC2PWR TCC2SC<

&tcc_power_fb[1] &SIG_IO_STATE(TCC2SC)

TCC 2 phase module temperature TCC 2 phase module temperature Unfiltered Regulation status signal for truck #2 SD70MAC, Release 10 and below. The current flowing from the DC link to inverter #1. Platform, 5000:1 LEM, Release 11 and above. The current flowing from the DC link to inverter #1. Should be used on all AC units independent of which ADA is used. The software will make the required adjustments if a ADA 304 is used. TCC #1 Blower Circuit Breakers Up: Phase 2: A TRUE value indicates that the single-speed blower breaker is closed. TCC #1 Blower Fast Speed Contactor Feedback: A TRUE value indicates that the contactor is in the closed position. TCC #1 Fast Speed Blower Contactor: A TRUE value causes the contactor to close and the blower to enter the high speed mode of operation. TCC #1 Heater Contactor Feedback: A TRUE value indicates that the contactor is in the closed position. TCC # power feedback TCC #1 Blower Slow Speed Contactor Feedback: A TRUE value indicates that the contactor is in the closed position. TCC #1 Slow Speed Blower Contactor: A TRUE value causes the contactor to close and the blower to enter the slow speed mode of operation. TCC 1 snubber temperature Platform, 5000:1 LEM, Release 11 and above. The current flowing from the DC link to inverter #2. Should be used on all platform units independent of which ADA is used. The software will make the required adjustments if a ADA 304 is used. SD70MAC, Release 10 and below. The current flowing from the DC link to inverter #2. Due to physical constraints of the High Voltage Cabinet, the normal flow of current through the device is AGAINST the "arrow", hence the negative scale factor. TCC #2 Blower Fast Speed Contactor Feedback: A TRUE value indicates that the contactor is in the closed position. TCC #2 Fast Speed Blower Contactor: A TRUE value causes the contactor to close and the blower to enter the high speed mode of operation. TCC #2 Heater Contactor Feedback: A TRUE value indicates that the contactor is in the closed position. TCC #2 power feedback TCC #2 Blower Slow Speed Contactor Feedback: A TRUE value indicates that the contactor is in the closed position.


TCC2SC>

&SIG_IO_STATE(TCC2SC)

TCC2SnF TCC3 A

&tcc_snubber_temperature[1] &ANA_IN_SLOW(TCC3_A)

TCC3PWR TCCBlw1 TCCBlw2 TCCShr>

&ANA_IN_SLOW(TCC_PWR3) &tccb_speed_mode[0] &tccb_speed_mode[1] &SIG_IO_STATE(TCCSHR)

TCHtCB<

&SIG_IO_STATE(TCHTCB)

TE_LED> TEFbklb TEL< TEL>

&SIG_IO_STATE(TE_LED) &tractive_effort &SIG_IO_STATE(TEL) &SIG_IO_STATE(TEL)

TELmLt>

&SIG_IO_STATE(TELMLT)

TELmOR<

&SIG_IO_STATE(TELMOR)

TH 1 8<

&SIG_IO_STATE(TH_1_8)

TH 3 8<


TH 5 8<


TH Idl<

&SIG_IO_STATE(TH_IDL)

TH2468<

&SIG_IO_STATE(TH2468)

Thr Pos THSt56<

&throttle &SIG_IO_STATE(THST56)

TCC #2 Slow Speed Blower Contactor: A TRUE value causes the contactor to close and the blower to enter the slow speed mode of operation. TCC 2 snubber temperature Platform, 5000:1 LEM, Release 11 and above. The current flowing from the DC link to inverter #3. Should be used on all AC units independent of which ADA is used. The software will make the required adjustments if a ADA 304 is used. The input power to TCC 3. TCC Blower #1 TCC Blower #2 Traction Control Computer Shutter Control: A value of FALSE opens the TCC blower shutters allowing for increase flow of cooling air. Traction Convertor Heater Circuit Breaker Feedback: A TRUE value indicates that the TCC Heater Circuit Breaker is in the closed position. This is a digital output used to drive the yellow LED of the TE meter (with a 74VDC signal). Tractive effort feedback TEL Relay Feedback, (TE Limit Relay), first used on India GT46MAC TEL Relay, used to drive the trainline in support of TE Limiting function. First used on India GT46MAC. TE Limit Light on control stand to turn on when special TE limiting has been requested through the display screen. (First used on India GT46MAC) TE Limit Override - a TRUE value indicates the desire to override the existing Tractive Effort Limiting condition (initially associated with Loco Detect TE Limit). The TH1_8 is the input from the throttle handle switch which indicates the consist operator's throttle handle position is 1 or 2 ... or 8. TH_3_8 indicates the throttle handle on the consist operator's control console is in a position between throttle 3 and 8 inclusive. TH_5_8 is input from the throttle handle 5-8 switch on the consist operator's console. It provides an indication that the throttle handle is in a position between throttle 5 and 8 inclusive. TH_IDL input is an indication that the local throttle handle is in the IDLE position. NOTE: This input is unlike the other throttle handle inputs in that it does NOT reflect the trainlined throttle handle signals. TH2468 input indicates that the throttle handle on the consist operator's control console is in throttle position 2, 4, 6 or 8. Throttle handle position, Idle and 1 through 8 THST56 input is an indication that the throttle handle on the consist operator's control stand is in the throttle Stop, 5 or 6 position


TI1CO<

&SIG_IO_STATE(TI1CO)

TI1CO>


TI2CO<


TI2CO>


Time TL 1T<

¤t_time &SIG_IO_STATE(TL_1T)

TL 22T<

&SIG_IO_STATE(TL_22T)

TL 24T

&ANA_IN_SLOW(TL_24T)

TL 24T

&ANA_IN_SLOW(TL_24T)

TL 27T< TL TEL< TLC LS< TLC RS< TLC<

&SIG_IO_STATE(TL_27T) &SIG_IO_STATE(TL_TEL) &SIG_IO_STATE(TLC_LS) &SIG_IO_STATE(TLC_RS) &SIG_IO_STATE(TLC)

TLCCB<

&SIG_IO_STATE(TLCCB)

TLDCon<

&SIG_IO_STATE(TLDCON)

TLDCon>

&SIG_IO_STATE(TLDCON)

Traction Inverter #1 Cutout Feedback: A TRUE value indicates that the inverter is cutout if the DCL switch-gear has passed through the middle position since the last change in the cutout's output. TCC #1 Inverter Cutout Solenoid: A TRUE value causes the cutout solenoid to activate. This will cause the inverter to be cutout if the DCL switch-gear passes though the middle position while this output is energized. Traction Inverter #2 Cutout Feedback: A TRUE value indicates that the inverter is cutout if the DCL switch-gear has passed through the middle position since the last change in the cutout's output. TCC #2 Inverter Cutout Solenoid: A TRUE value causes the cutout solenoid to activate. This will cause the inverter to be cutout if the DCL switch-gear passes though the middle position while this output is energized. This is the current time signal. Trainline 1T: A TRUE value indicates a request for slow speed operation. In this mode TL_24T is used to adjust the locomotive's loading level. Trainline 22T: Used to provide synchronization of all air compressors within a consist. A value of TRUE indicates a trainline request for air. A value of FALSE indicates no trainline request for air. Same as CRL input. AC System : The TL_24T signal is an indication of the brake handle position when in dynamic brake. In slow speed and power reduction mode, this signal indicated a loading level. 0 v indicates minimum loading where 74v indicates full loading. DC System : The TL_24T signal is an indication of the brake handle position when in dynamic brake. In slow speed and power reduction mode, this signal indicated a loading level. 0 v indicates minimum loading where 74v indicates full loading. Trainline 27T: A TRUE value indicates that a locomotive in the consist is transferring fuel. Trainlined TE Limit signal, TE_TEL, first used on India GT46MAC TrainLine Complete Left Side Trainline Complete Right Side TrainLine Complete digital input for Standard LCC Controlled HEP Type. A value of TRUE indicates that the HEP safety loop circuit is complete. TrainLine Complete Circuit Breaker interlock digital input for Standard LCC Controlled HEP Type. A value of TRUE indicates that the circuit breaker is closed. Trainline Disconnect - Connect - Feedback indicating the current position of the TLD Switchgear - A TRUE value indicates that the TLD switch-gear has been operated to the CONNECT position. Trainline Disconnect (Connected)


TLDDis<

&SIG_IO_STATE(TLDDIS)

TLDDis> TLP CB<

&SIG_IO_STATE(TLDDIS) &SIG_IO_STATE(TLP_CB)

TLP RV>

&SIG_IO_STATE(TLP_RV)

TLPPrs<

&SIG_IO_STATE(TLPPRS)

TLPR<

&SIG_IO_STATE(TLPR)

TLPR>

&SIG_IO_STATE(TLPR)

TLV LS< TLV RS< TM AirF

&SIG_IO_STATE(TLV_LS) &SIG_IO_STATE(TLV_RS) &ANA_IN_SLOW(TM_AIR)

TM AirF

&ANA_IN_SLOW(TM_AIR)

Tm Zone TM_Co TM1 A TM1 C V TM1 CO>

&PROT_DATA(timezone_index) &number_motors_cutout &ANA_IN_SLOW(TM1_A) &motor_terminal_voltage[0] &SIG_IO_STATE(TM1_CO)

TM1 F TM1 RPM TM1 V

&traction_motor_temperature[0] &ANA_IN_SLOW(TM1_RPM) &ANA_IN_SLOW(TM1_V)

TM1Blw< TM2 A TM2 C V TM2 CO>

&SIG_IO_STATE(TM1BLW) &ANA_IN_SLOW(TM2_A) &motor_terminal_voltage[1] &SIG_IO_STATE(TM2_CO)

TM2 F

&traction_motor_temperature[1]

Trainline Disconnect - Disconnect - Feedback indicating the current position of the TLD Switchgear - A TRUE value indicates that the TLD switch-gear has been operated to the DISCONNECT position. Trainline Disconnect (Disconnected) Turbo Lube Pump Circuit Breaker: A TRUE value indicates the circuit breaker is in the on position. Turbo Lube Pump ReVerse Relay. A value of TRUE causes this relay to pick up and run the Soak Back pump in the reverse direction for engine pre-lube purposes. Turbo Lube Pump Pressure Switch: A value of TRUE indicates ...... A value of FALSE indicates ..... Turbo Lube Pump Relay Feedback: A TRUE value indicates that the turbo lube pump relay is in the closed position. Turbo Lube Pump Relay: A value of TRUE causes the relay to close and the Turbo Lube Pump to operate. Trainline Voltage Left Side Trainline Voltage Right Side This is the temperature of the air being used to cool the traction motors. This temperature is measured at the inlet to the traction motor blower. ADA302-Vers.12. This is the temperature of the air being used to cool the traction motors. This temperature is measured at the inlet to the traction motor blower-NOT! It is measured at the plenum of the SCR bridge. This is using an old TM bearing hardwa This is the time zone signal. mtr_cutout - &number_motors_cutout Traction Motor 1 field current. Motor terminal voltage for motor 1. Traction Motor 1 Cut Out: A value of TRUE causes traction motor 1 to be removed from the power circuit the next time the reverser switch-gear is centered. Traction motor 1 temperature Traction Motor #1 RPM Traction Motor number one voltage feedback for export style twin grid path arrangement with six traction motors. Circuit breaker interlock for number one electric traction motor blower. Traction Motor 2 armature current. Motor terminal voltage for motor 2. Traction Motor 2 Cut Out: A value of TRUE causes traction motor 2 to be removed from the power circuit the next time the reverser switch-gear is centered. Traction motor 2 temperature SIGNAL DESCRIPTIONS B-109

TM2 RPM TM2 V TM2Blw< TM3 A TM3 C V TM3 CO>

&ANA_IN_SLOW(TM2_RPM) &ANA_IN_SLOW(TM2_V) &SIG_IO_STATE(TM2BLW) &ANA_IN_SLOW(TM3_A) &motor_terminal_voltage[2] &SIG_IO_STATE(TM3_CO)

TM3 F TM3 RPM TM3 V TM4 A TM4 C V TM4 CO>

&traction_motor_temperature[2] &ANA_IN_SLOW(TM3_RPM) &ANA_IN_SLOW(TM3_V) &ANA_IN_SLOW(TM4_A) &motor_terminal_voltage[3] &SIG_IO_STATE(TM4_CO)

TM4 F TM4 RPM TM4 V TM5 A TM5 C V TM5 CO>

&traction_motor_temperature[3] &ANA_IN_SLOW(TM4_RPM) &ANA_IN_SLOW(TM4_V) &ANA_IN_SLOW(TM5_A) &motor_terminal_voltage[4] &SIG_IO_STATE(TM5_CO)

TM5 F TM5 RPM TM6 A TM6 C V TM6 CO>

&traction_motor_temperature[4] &ANA_IN_SLOW(TM5_RPM) &ANA_IN_SLOW(TM6_A) &motor_terminal_voltage[5] &SIG_IO_STATE(TM6_CO)

TM6 F TM6 RPM TM6 V TM7 A TM7 CO>

&traction_motor_temperature[5] &ANA_IN_SLOW(TM6_RPM) &ANA_IN_SLOW(TM6_V) &ANA_IN_SLOW(TM7_A) &SIG_IO_STATE(TM7_CO)

TM8 A TM8 CO>

&ANA_IN_SLOW(TM8_A) &SIG_IO_STATE(TM8_CO)

Traction Motor #2 RPM Traction Motor 2 armature voltage. Circuit breaker interlock for number two electric traction motor blower. Traction Motor 3 armature current. Motor terminal voltage for motor 3. Traction Motor 3 Cut Out: A value of TRUE causes traction motor 3 to be removed from the power circuit the next time the reverser switch-gear is centered. Traction motor 3 temperature Traction Motor #3 RPM Traction Motor 3 armature voltage. Traction Motor 4 armature current. Motor terminal voltage for motor 4. Traction Motor 4 Cut Out: A value of TRUE causes traction motor 4 to be removed from the power circuit the next time the reverser switch-gear is centered. Traction motor 1 temperature Traction Motor #4 RPM Traction Motor 4 armature voltage. Traction Motor 5 armature current. Motor terminal voltage for motor 5. Traction Motor 5 Cut Out: A value of TRUE causes traction motor 5 to be removed from the power circuit the next time the reverser switch-gear is centered. Traction motor 1 temperature Traction Motor #5 RPM Traction Motor 6 armature current. Motor terminal voltage for motor 6. Traction Motor 6 Cut Out: A value of TRUE causes traction motor 6 to be removed from the power circuit the next time the reverser switch-gear is centered. Traction motor 6 temperature (0-999 degrees) Traction Motor #6 RPM Traction Motor 6 armature voltage. Traction Motor 7 field current. Traction Motor 7 Cut Out: A value of TRUE causes traction motor 7 to be removed from the power circuit the next time the reverser switch-gear is centered. Traction Motor 8 armature current. Traction Motor 8 Cut Out: A value of TRUE causes traction motor 8 to be removed from the power circuit the next time the reverser switch-gear is centered. SIGNAL DESCRIPTIONS B-110

TM8 V TMAvRPM TMB1F TMB2F TMB3F TMB4F TMB5F TMB6F TMBCalc TmbCdAc TmbEgSp TMBL1 A

&ANA_IN_SLOW(TM8_V) &avg_motor_rpm &ANA_IN_SLOW(TMB1) &ANA_IN_SLOW(TMB2) &ANA_IN_SLOW(TMB3) &ANA_IN_SLOW(TMB4) &ANA_IN_SLOW(TMB5) &ANA_IN_SLOW(TMB6) &calculated_tmb_rpm &tmb_coast_down_active &tmb_eng_speed_request_low &ANA_IN_SLOW(TMBL1_A)

TMBL2 A

&ANA_IN_SLOW(TMBL2_A)

TMBlw1 TMBlw1 TMBlw2 TMBlw2 TmbRpmR TMCO 1< TMCO 2< TMCO 3< TMCO 4< TMCO 5< TMCO 6< TMCO 7< TMCO 8< TMCoReq TMCoSt TMCoStu TMCoUL<

&traction_blower_list[0] &tmb_speed_mode[0] &traction_blower_list[1] &tmb_speed_mode[1] &tmb_rpm_desired &SIG_IO_STATE(TMCO_1) &SIG_IO_STATE(TMCO_2) &SIG_IO_STATE(TMCO_3) &SIG_IO_STATE(TMCO_4) &SIG_IO_STATE(TMCO_5) &SIG_IO_STATE(TMCO_6) &SIG_IO_STATE(TMCO_7) &SIG_IO_STATE(TMCO_8) &motor_co_request &motor_co_state &motor_co_status &SIG_IO_STATE(TMCOUL)

Traction Motor 8 armature voltage. Average traction motor speed, 0 - 9999 rpm The temperature of Traction Motor #1's pinion end bearing. The temperature of Traction Motor #2's pinion end bearing. The temperature of Traction Motor #3's pinion end bearing. The temperature of Traction Motor #4's pinion end bearing. The temperature of Traction Motor #5's pinion end bearing. The temperature of Traction Motor #6's pinion end bearing. tmb_calc - &calculated_tmb_rpm tmb_cd_act - &tmb_coast_down_active tmb_eng_spd - &tmb_eng_speed_request_low Traction Motor Blower CT #1 current ... this input provides a current that is proportional to the total current in phase 2 of the Truck 1 blower motor. This value is used for TMB load management and fault detection.. Traction Motor Blower CT #2 current ... this input provides a current that is proportional to the total current in phase 2 of the Truck 2 blower motor. This value is used for TMB load management and fault detection.. Traction motor 1 blower status (0=off, 1=half speed, 2=full speed) Traction Motor Blower #1 Traction motor 2 blower status (0=off, 1=half speed, 2=full speed) Traction Motor Blower #2 tmb_rpm_des - &tmb_rpm_desired Traction Motor Cutout #1 Feedback: This is TRUE when Traction Motor 1 has been cut out. Traction Motor Cutout #2 Feedback: This is TRUE when Traction Motor 2 has been cut out. Traction Motor Cutout #3 Feedback: This is TRUE when Traction Motor 3 has been cut out. Traction Motor Cutout #4 Feedback: This is TRUE when Traction Motor 4 has been cut out. Traction Motor Cutout #5 Feedback: This is TRUE when Traction Motor 5 has been cut out. Traction Motor Cutout #6 Feedback: This is TRUE when Traction Motor 6 has been cut out. Traction Motor Cutout #7: This is TRUE when Traction Motor 7 has been cut out. Traction Motor Cutout #8: This is TRUE when Traction Motor 8 has been cut out. mtr_co_req - &motor_co_request mtr_co_state - &motor_co_state motor_co_st - &motor_co_status Traction Motor Cutout Unlock: A TRUE value indicates that the Traction Motor Cutout Switch is unlocked and its position may change.


TmIj1

&ANA_IN_SLOW(TMIJ[0])

Injection delay time for cylinder #1's fuel injector. A pseudo-signal remapped from actual multi-byte multi-cylinder multi-ECM PID 211 and one of ECM #1, 2, or 3.

TmIj10


scaled unsigned char: 10 microsec. / bit, displayed in milliseconds Injection delay time for cylinder #10's fuel injector. A pseudo-signal remapped from actual multi-byte multi-cylinder multi-ECM PID 211 and one of ECM #1, 2, or 3.

TmIj11



TmIj12



TmIj13



TmIj14


scaled unsigned char: 10 microsec. / bit, displayed in milliseconds Injection delay time for cylinder #14's fuel injector. A pseudo-signal remapped from actual multi-byte multi-cylinder multi-ECM PID 211 and one of ECM #1, 2, or 3. scaled unsigned char: 10 microsec. / bit, displayed in milliseconds


TmIj15



TmIj16



TmIj17

&ANA_IN_SLOW(TMIJ)


TmIj18

&ANA_IN_SLOW(TMIJ)


TmIj19

&ANA_IN_SLOW(TMIJ)


TmIj2




TmIj20

&ANA_IN_SLOW(TMIJ)


TmIj3



TmIj4



TmIj5


scaled unsigned char: 10 microsec.. / bit, displayed in milliseconds Injection delay time for cylinder #5's fuel injector. A pseudo-signal remapped from actual multi-byte multi-cylinder multi-ECM PID 211 and one of ECM #1, 2, or 3.

TmIj6



TmIj7




TmIj8



TmIj9



TMMnRPM TMMxRPM TMShtr> TmSpdSr TMTermV TMTrnEn TorFb 1 TorFb 2 TorStat TORSTU1 TORSTU2 TPU RPM TPU RPM TPU_RPM TPU1RPM TPU2RPM Tq_attn Tq_Rf TqAllw1 TqAllw2

scaled unsigned char: 10 microsec. / bit, displayed in milliseconds &ANA_IN_SLOW(MIN_MOTOR_R RPM of the slowest traction motor PM) &max_motor_rpm RPM of the fastest traction motor. &SIG_IO_STATE(TMSHTR) Traction Motor Blower Shutter Control: A value of FALSE opens the traction motor blower shutters allowing for increase flow of cooling air. &tm_spd_source tm_spd_source - &tm_spd_source &motor_terminal_voltage motor_vol - &motor_terminal_voltage &motor_transfer_enabled mtr_tran_enbl - &motor_transfer_enabled &ANA_OUT(TORFB_1) TCC #1 Torque Feedback: The torque feedback signal is used by RAILS to simulate locomotive loading. &ANA_OUT(TORFB_2) TCC #2 Torque Feedback: The torque feedback signal is used by RAILS to simulate locomotive loading. &torque_status This is the poor cousin of regstat on the DC locomotive. &tcc_torque_status[0] TORSTAT_1 - &tcc_torque_status[0] &tcc_torque_status[1] TORSTAT_2 - &tcc_torque_status[1] &ANA_IN_SLOW(TPU_RPM) Engine Turbo RPM. For 17 blade turbo (16-710) &ANA_IN_SLOW(TPU_RPM) Engine Turbo RPM. For 16 blade turbo (12-710) &ANA_IN_SLOW(TPU_RPM) TurboSpeed from 2-WAY EMDEC link, H-engine ONLY, this is the highest turbo speed measured by EMDEC &ANA_IN_SLOW(TPU1RPM) Engine Turbo RPM from the #1 Turbo on the HERO engine. &ANA_IN_SLOW(TPU2RPM) Engine Turbo RPM from the #2 Turbo on the HERO engine. &manual_torque_attenuation torque_attn - &manual_torque_attenuation &tcc_torque_ref torqe_ref - &torque_ref &ANA_IN_SLOW(TQALLW[0]) Allowed engine torque from ECM 1 &ANA_IN_SLOW(TQALLW[1]) Allowed engine torque from ECM 2. SIGNAL DESCRIPTIONS B-115

TqAllw3 Tr1BCB<

&ANA_IN_SLOW(TQALLW) &SIG_IO_STATE(TR1BCB)

TR1FAB<

&SIG_IO_STATE(TR1S2)

TR1FAB<

&SIG_IO_STATE(TR1FAB)

TR1FSA>


TR1FSA>

&SIG_IO_STATE(TR1FSA)

TR1HAB<

&SIG_IO_STATE(TR1HAB)

TR1HSA>

&SIG_IO_STATE(TR1HSA)

TR1MAB<

&SIG_IO_STATE(TR1MAB)

TR1MSA>

&SIG_IO_STATE(TR1MSA)

TR1PrS<

&SIG_IO_STATE(TR1PRS)

TR1SS<


TR1SS<

&SIG_IO_STATE(TR1SS)

TR1SS>

&SIG_IO_STATE(TR1SS)

TR1SS>


TR1STAT Tr2BCB<

&tcc_torque_status[0] &SIG_IO_STATE(TR2BCB)

TR2FAB<

&SIG_IO_STATE(TR2FAB)

Allowed engine torque from EMC 3. Truck #1 Blower Circuit Breaker Feedback - a TRUE value indicates that the circuit breaker for the #1 truck blower motor is CLOSED. Rel.12:2-Speed Traction Motor Blower Motor #1 High Speed Contactor Feedback (2-speed MDTMB): A value of TRUE indicates that the TR1FA contactor and the TR1FB contactor are in the closed position. Traction Motor Blower Motor #1 High Speed Contactor Feedback (2-speed MDTMB): A value of TRUE indicates that the TR1FA contactor and the TR1FB contactor are in the closed position. Rel.12:2-Speed Traction Motor Blower Motor #1 High Speed Contactor (2 speed MDTMB): A value of TRUE causes the TR1FA contactor and the TR1FB contactor to close. Traction Motor Blower Motor #1 High Speed Contactor (2 speed MDTMB): A value of TRUE causes the TR1FA contactor and the TR1FB contactor to close. Traction Motor Blower #1 High Speed contactor Feedback (Platform 3-speed MDTMB): A value of TRUE indicates that both TR1HSA & TR1HSB contactors are picked up. Truck #1 Blower High Speed A (Platform 3-speed MDTMB, 2-pole mode) A value of TRUE causes TR1HSA contactor to pick up and then TR1HSB contactor to pick up by aux. contact. Traction Motor Blower #1 Medium Speed contactor. Feedback (Platform 3-speed MDTMB): A value of TRUE indicates that both TR1MSA & TR1MSB contactors are picked up. Traction Motor Blower Motor #1 Medium Speed "A" Contactor (Platform 3-speed MDTMB, 4pole mode) : A value of TRUE causes the TR1MSA contactor to pick up and then TR1MSB contactor to pick up by aux. contact. Traction Motor Blower #1 Pressure Switch: A value of TRUE indicates that Traction Motor Blower #1 is creating an air pressure differential. Rel.12:2-Speed Traction Motor Blower Motor #1 Slow Speed Contactor Feedback: A value of TRUE indicates that the contactor is in the closed position. 3-Speed Traction Motor Blower Motor #1 Slow Speed Contactor Feedback: A value of TRUE indicates that the contactor is in the closed position. 3-Speed Traction Motor Blower Motor #1 Slow Speed Contactor: A value of TRUE causes the TR1SS contactor to close. Rel.12:2-Speed Traction Motor Blower Motor #1 Slow Speed Contactor: A value of TRUE causes the TR1SS contactor to close. Filtered regulation status for truck #1 Truck #2 Blower Circuit Breaker Feedback - a TRUE value indicates that the circuit breaker for the #2 truck blower motor is CLOSED. Traction Motor Blower Motor #2 High Speed Contactor Feedback (2-speed MDTMB): A value of TRUE indicates that the TR2FA contactor and the TR2FB contactor are in the closed position.


TR2FAB<

TR2FSA> TR2FSA> TR2HAB< TR2HSA>

TR2MAB< TR2MSA>

TR2PrS< TR2SS< TR2SS< TR2SS> TR2SS> TR2STAT TracPwr TrAcSPw TracThr Trail< Train<


Rel.12:2-Speed Traction Motor Blower Motor #2 High Speed Contactor Feedback (2-speed MDTMB): A value of TRUE indicates that the TR2FA contactor and the TR2FB contactor are in the closed position. &SIG_IO_STATE(TR2S2) Rel.12:2-Speed Traction Motor Blower Motor #2 High Speed Contactor (2 speed MDTMB): A value of TRUE causes the TR2FA contactor and the TR2FB contactor to close. &SIG_IO_STATE(TR2FSA) Traction Motor Blower Motor #2 High Speed Contactor (2 speed MDTMB): A value of TRUE causes the TR2FA contactor and the TR2FB contactor to close. &SIG_IO_STATE(TR2HAB) Traction Motor Blower #2 High Speed contactor Feedback (Platform 3-speed MDTMB): A value of TRUE indicates that both TR2HSA & TR2HSB contactors are picked up. &SIG_IO_STATE(TR2HSA) Truck #2 Blower High Speed "A" Contactor (Platform 3-speed MDTMB, 2-pole mode): A value of TRUE causes TR2HSA contactor to pick up and then TR2HSB contactor to pick up by aux. contact. &SIG_IO_STATE(TR2MAB) Traction Motor Blower #2 Medium Speed contactor. Feedback (Platform 3-speed MDTMB): A value of TRUE indicates that both TR2MSA & TR2MSB contactors are picked up. &SIG_IO_STATE(TR2MSA) Traction Motor Blower Motor #2 Medium Speed "A" Contactor (Platform 3-speed MDTMB, 4pole mode) : A value of TRUE causes the TR2MSA contactor to pick up and then TR2MSB contactor to pick up by aux. contact. &SIG_IO_STATE(TR2PRS) Traction Motor Blower #2 Pressure Switch: A value of TRUE indicates that Traction Motor Blower #2 is creating an air pressure differential. &SIG_IO_STATE(TR2S1) Rel.12:2-Speed Traction Motor Blower Motor #2 Slow Speed Contactor Feedback: A value of TRUE indicates that the contactor is in the closed position. &SIG_IO_STATE(TR2SS) 2-Speed Traction Motor Blower Motor #2 Slow Speed Contactor Feedback: A value of TRUE indicates that the contactor is in the closed position. &SIG_IO_STATE(TR2S1) Rel.12:2-Speed Traction Motor Blower Motor #2 Slow Speed Contactor: A value of TRUE causes the TR2SS contactor to close. &SIG_IO_STATE(TR2SS) 3-Speed Traction Motor Blower Motor #2 Slow Speed Contactor: A value of TRUE causes the TR1SS contactor to close. &tcc_torque_status[1] Filtered regulation status for truck #2 &system_test_traction_power_ref TracPwr is set along with S_TPwr to defer control of the traction_power_reference variable to the test engineer. &ANA_IN_SLOW(TRAC_ACC_SH The Traction Accessory Shaft Power is the accessory shaft feedback whose components are AFT_PWR) specifically for the traction system. &trac_throttle trac_throt - &trac_throttle &SIG_IO_STATE(TRAIL) Pneumatic Trail Pressure Switch: A true value indicates the unit is pneumatically set up as a trail unit. &SIG_IO_STATE(TRAIN) Train connected digital input from console switch. Determines overspeed value to be used by Israel overspeed option.


TraMsg TraStat TRC SU< TRC_SU> TRC_TL< TrcCoRq TrcCoSt TrChpnd TRCSU< TRdySt TRdyStu TREBCB< TREqCB< TrnInPg TT_HP TT_PWR TUNNEL< Unit N Unitflg UnRFdLm UOV< UOV> UPCSCO<

V Spd V_ack V_Gan V_P_D_V V_Rf_t V_Thr

&STR_DEVICE(TRAMSG)

These bytes present the displayed message for the health of the locomotive dynamic brake system. Ref EDPS 400 5.5.18. &DISCRETE_OUT(TRASTAT) This byte indicates the health of the locomotive traction system. Ref EDPS 400 5.5.4. &SIG_IO_STATE(TRC_SU) Third Rail Circuit SetUp. &SIG_IO_STATE(TRC_SU) Third Rail Current Setup , used on DM Locomotives. &SIG_IO_STATE(TRC_TL) Third Rail Circuit Trainline &traction_co_request trc_co_req - &traction_co_request &traction_co_state trc_co_st - &traction_co_state &traction_change_pending tr_ch_pend - &traction_change_pending &SIG_IO_STATE(TRCSU) Third Rail Current Setup , used on DM Locomotives. &tcc_ready_state tcc_rdy_st - &tcc_ready_state &tcc_ready_status tcc_rdy_stat - &tcc_ready_status &SIG_IO_STATE(TREBCB) 3rd Rail Equipment Blower Circuit Breaker Feedback - a TRUE value indicates that the circuit breaker for the 3rd rail equipment blower(s) is CLOSED. 1st used = LIRR DM30AC. &SIG_IO_STATE(TREQCB) Third Rail Equipment Circuit Breaker. A TRUE value indicates that the circuit breaker is ON. &transition_in_progress trns_in_prg - &transition_in_progress &ANA_IN_SLOW(TOTAL_TRACTI The sum of the powers of all inverters producing traction power, in units of Horsepower ON_POWER) &ANA_IN_SLOW(TOTAL_TRACTI The sum of the powers of all inverters producing traction power, in units of Watts. ON_POWER) &SIG_IO_STATE(TUNNEL) Indicates EMDEC has detected a tunnel by noting that the engine air temperature is over 150F. &unit_number This is the unit number signal. &PROT_DATA(unit_flag) unit_flag - &PROT_DATA(unit_flag) &unrated_mg_fld_current_limit unrat_fld_lim - &unrated_mg_fld_current_limit &SIG_IO_STATE(UOV) Under/Over Voltage: A TRUE value indicates that the relay is in the closed position. &SIG_IO_STATE(UOV) HEP Under/Over Voltage Protection Relay: A TRUE value indicates that a fault condition exists and the HEP power should not be transmitted to the head end power trainline. &SIG_IO_STATE(UPCSCO) Union Pacific Cab Signal Cut-Out: An EM2000 input signal that is passed through to ICE indicating the status of the CS system. A TRUE value (input high) indicates that this system is/ should be cutout. &ANA_OUT(V_SPD) The most correct train speed available to the EM2000 system to be sent to the MABS. &voltage_ack volt_ack - &voltage_ack &voltage_error_gain volt_gain - &voltage_error_gain &raw_v_plus_delta_v v_plus_dv - &v_plus_delta_v &voltage_reference_table volt_ref_t - voltage_reference_table &volt_throttle volt_throt - &volt_throttle SIGNAL DESCRIPTIONS B-118

VDesRef VPC<

&voltage_desired &SIG_IO_STATE(VPC)

VPC>

&SIG_IO_STATE(VPC)

VPwrRef VS SW<

&equivalent_power_voltage_limit &SIG_IO_STATE(VS_SW)

VSpd OK

&SIG_IO_STATE(VSPD_OK)

VWS CB<

&SIG_IO_STATE(VWS_CB)

VWSAct<

&SIG_IO_STATE(VWSACT)

VWSCOK<

&SIG_IO_STATE(VWSCOK)

VWSDOK<

&SIG_IO_STATE(VWSDOK)

VWSInh> VWST1A<

&SIG_IO_STATE(VWSINH) &SIG_IO_STATE(VWST1A)

VWST1E> VWST2A<

&SIG_IO_STATE(VWST1E) &SIG_IO_STATE(VWST2A)

VWST2E> WFLOL<

&SIG_IO_STATE(VWST2E) &SIG_IO_STATE(WFLOL)

WFLOR<

&SIG_IO_STATE(WFLOR)

Wh Slp< Wh Slp>

&SIG_IO_STATE(WH_SLP) &SIG_IO_STATE(WH_SLP)

Voltage reference after rate limiting 0-9999 volts Voltage Protection Contactor Relay: A TRUE value indicates the contactor is in the closed position. Voltage Protection Contactor: A TRUE value causes the relay to close and power to be applied to the Traction Control Computers. Power based voltage reference 0-9999 volts Vigilance Suppression Pressure Switch: A true value indicates that the air brake valve handle is at or beyond suppression position and brake cylinder pressure is above is certain value. (section 3.6) Vehicle Speed Valid Signal sent to the MABS. A TRUE value indicates that the LCC vehicle speed value is considered valid. Vendor Wheel Slip Circuit Breaker Feedback - a TRUE value indicates that the Vendor Wheel Slip Circuit Breaker is CLOSED. Vendor Wheel Slide Active Input - This input is provided to the LCC from a vendor supplied wheel slip system (e.g. Knorr MGS system on Israel JT42). A TRUE value indicates that the vendor wheel slip system is deemed to be in an active state from the Cont Vendor Wheel Control OK Input - This input is provided to the LCC from a vendor supplied wheel slip system (e.g. Knorr MGS system on LIRR DE30AC). A TRUE value indicates that the vendor wheel slip system is deemed to be in an OK state from the Control st Vendor Wheel Diagnostic OK Input - This input is provided to the LCC from a vendor supplied wheel slip system (e.g. Knorr MGS system on LIRR DE30AC). A TRUE value indicates that the vendor wheel slip system is deemed to be in an OK state from the Diagnos Vendor Wheel Slip Inhibit Vendor Wheel Slip Truck #1 Active Input - This input is provided to the LCC from a vendor supplied wheel slip system (e.g. Knorr MGS system on LIRR DE30AC). A TRUE value indicates that the vendor wheel slip system is active on truck #1. Vendor Wheel Slip Truck #1 Enable Vendor Wheel Slip Truck #2 Active Input - This input is provided to the LCC from a vendor supplied wheel slip system (e.g. Knorr MGS system on LIRR DE30AC). A TRUE value indicates that the vendor wheel slip system is active on truck #2. Vendor Wheel Slip Truck #2 Enable Wheel Flange Lube Our, Left Side: A TRUE value indicates that this device is out of lubrication material. Wheel Flange Lube Out, Right Side: A TRUE value indicates that this device is out of lubrication material. Wheel Slip Light Relay Feedback: A TRUE value indicates the relay is in the closed position. Wheel Slip Relay: A TRUE value causes the relay to close which activates the wheel slip light.


WL 10T< WLTS< WntrIs< WntrMV> WPdLbPS WPdRbPS WPEgILP WPEgIRP WPEgOtP WS Stat WS_I_Lm WS_P_Rf WSAvI_M WSAvI_S WSDetct WSJ LS< WSJ RS< WSLgTim WSr_V WSSndTi WSStgSt WtrDrn< XAGLod<

Yr1_dSt Yr1_Pr Zero_St ZSpd<

&SIG_IO_STATE(WL_10T) &SIG_IO_STATE(WLTS) &SIG_IO_STATE(WNTRIS)

Trainline 10T: Trainlined wheel slip indication. A TRUE value indicates a slip condition. Warning Lights Relay Feedback - a TRUE input indicates that the relay is picked up. Winter Isolate Switch: A TRUE value indicates that the isolation switch is in the winter isolate position. &SIG_IO_STATE(WNTRMV) Winterization Magnet Valve: A value of TRUE energizes the winterization magnet valve which causes the winterization shutter to close. This redirects the engine's cooling air. &ANA_IN_SLOW(WPDLB) Coolant (water) pressure drop across the left bank of the engine. &ANA_IN_SLOW(WPDRB) Coolant (water) pressure drop across the right bank of the engine. &ANA_IN_SLOW(WPEGIL) Coolant (water) pressure into the engine's left bank. &ANA_IN_SLOW(WPEGIR) Coolant (water) pressure into the engine's right bank. &ANA_IN_SLOW(WPEGOT) Coolant (water) pressure out of the engine. &ws_status Wheel slip status (Idle, StSS, SS, DVDT or CS) &wheel_slip_current_limit ws_cur_lim - &wheel_slip_current_limit &wheel_slip_power_reference ws_p_ref - &wheel_slip_power_reference &ws_average_tm_current_medium ws_avg_tmi - &ws_average_tm_current_medium &ws_average_tm_current_slow wsi_avg - &ws_average_tm_current_slow &wheel_slip_detected wsdetect - &wheel_slip_detected &SIG_IO_STATE(WSJ_LS) WaySide Jumper Left Side: a TRUE value indicates that a wayside power jumper has been detected at the locomotive left hand side (opposite to engineer's side). &SIG_IO_STATE(WSJ_RS) WaySide Jumper Right Side: a TRUE value indicates that a wayside power jumper has been detected at the locomotive right hand side (engineer's side). &wheel_slip_light_timer wsr_tst_time - &wheel_slip_light_timer &wsr_voltage wsr_voltage - &wsr_voltage &wheel_slip_sand_timer sand_sw - &wheel_slip_sand_timer &ws_stage_status ws_stage_st - &ws_stage_status &SIG_IO_STATE(WTRDRN) Water Drain System Arming Circuit: A TRUE value indicates the circuit is armed. &SIG_IO_STATE(XAGLOD) Excessive Auxiliary Generator Load: A value of TRUE indicates that Auxiliary Generator load demand is more than it can handle at the current engine speed. This input will typically initiate a request for an engine speed-up. (1st used on platform - signa &RUN_TOT_DATA(rt_data.yearly_ year1_dst - &RUN_TOT_DATA(rt_data.yearly_record[0].distance_traveled[0]) record[0].distance_traveled[0]) &RUN_TOT_DATA(rt_data.yearly_ year1_pwr - &RUN_TOT_DATA(rt_data.yearly_record[0].traction_power[0]) record[0].traction_power[0]) &locomotive_zero_state zero_state - &locomotive_zero_state &SIG_IO_STATE(ZSPD) Zero Speed Relay Feedback: A TRUE value indicates that the relay is in the closed position.


ZSpd>

&SIG_IO_STATE(ZSPD)

Zero Speed: A TRUE value indicates that the locomotive is moving at a speed less than some specified value.


0

Appendix C . SAFETY PRECAUTIONS

SAFETY PRECAUTIONS

C-1

TABLE OF CONTENTS TABLE OF CONTENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.0 SAFETY PRECAUTIONS FOR GT46MAC LOCOMOTIVES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.1 INTRODUCTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.2 GT46MAC Discharge Procedure Flow Chart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 1.3 DETAILED EXPLANATION OF GT46MAC DISCHARGE PROCEDURE FLOW CHART. . . . . . . . . . . . . . 7

2.0 LOCOMOTIVE DISCHARGE SYSTEMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.1 MEASURING AND SHORTING PROCEDURE FOR CAPACITORS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.1.1 General Rules of Grounding and Shorting Philosophy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 2.1.2 Dedicated GT46MAC Rules of Grounding and Shorting Philosophy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 2.2 AUTOMATIC DISCHARGE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 2.2.1 Reverser In Center Position (Bleeder Resistors) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 2.2.2 Isolation Switch In ISOLATE (Dynamic Brake Grids) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 2.2.3 Diesel Engine Shutdown Battery Knife Switch (Crowbar Thyristor) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 2.2.4 DCL-Switch Gear / Shorting Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 2.3 MANUAL DISCHARGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 2.3.1 Grounding And Shorting Cable For External Access Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 2.3.1.1 Grounding Point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 2.3.1.2 Measuring Voltage On Point P . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 2.3.1.3 Measuring Voltage On Point N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 2.3.1.4 Grounding and Measuring Voltage On Points U, V, and W . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 2.3.1.5 Short Circuit Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 2.3.2 Grounding and Shorting Cable for the Main Bus. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 2.3.2.1 Grounding Point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 2.3.2.2 Measuring Voltage On Point P . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 2.3.2.3 Measuring Voltage On Point R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 2.3.2.4 Measuring Voltage On Point N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 2.3.2.5 Short Circuit Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 2.3.3 Grounding and Shorting Cable for Grounding Capacitors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 2.3.3.1 Grounding Point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 2.3.3.2 Measuring Voltage On C15 (Left-Hand Terminal) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 2.3.3.3 Measuring Voltage On C15 (Right-Hand Terminal). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 2.3.3.4 Voltage Measurements On C11 and C12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 2.3.3.5 Short Circuit Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 2.3.4 Grounding and Shorting Cable for the Phase Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 2.3.4.1 Grounding Point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 2.3.4.2 Busbar Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 2.3.4.3 Short Circuit Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 2.4 REMOVAL PROCEDURE FOR CAPACITORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 2.4.1 DC Link Capacitor Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 2.4.2 Removal of Grounding Capacitors (C11, C12, or C15). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

3.0 SPECIAL SITUATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 3.1 RUNNING GEAR PIT INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 3.2 PINION CUTTING PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 3.3 IN-FIELD TRACTION MOTOR CHANGEOUT PROCEDURE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

4.0 GLOSSARY OF TERMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 5.0 LIST OF TOOLING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 6.0 LIST OF SAFETY NAMEPLATES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

C-2


0

1.0 SAFETY PRECAUTIONS FOR GT46MAC LOCOMOTIVES 1.1 INTRODUCTION The GT46MAC is a new locomotive model that has some equipment not found on freight locomotives with DC traction motors. Safety precautions specific to the GT46MAC locomotive must be followed before inspecting the equipment. This section provides general safety information and precautions that are necessary before maintenance can be performed on the locomotive. The guidelines and procedures in this document are intended to create a safe environment in which maintenance and repair work can be accomplished on the GT46MAC locomotive. These procedures can not account for every possible scenario that will be encountered in working with the electrical systems during the effective service life of this locomotive. Therefore, in the event work needs to be performed that deviates from the policies and procedures as specified in this document, the following five general safety rules should be utilized: 1. 2. 3. 4. 5.

Switch off the power source. Prevent re-closing of switches. Check absence of voltage. Apply grounding and shorting cables. Protect adjacent live parts by covers or barriers.

If there are questions on the five rules outlined above or how the rules apply to any given situation, please request additional assistance from qualified personnel before proceeding. WARNING

All local safety rules should be observed. This document is designed for use by various customers. It should be used in conjunction with customer specific safety rules. The output of the TA17-6 main generator is the DC link voltage. A large capacitor rack is located within each of the traction inverters TCC1 and TCC2 to filter main generator voltage. These capacitors operate at the DC link voltage between 600 and 3400 VDC. When the locomotive is shut down these capacitors could retain this high voltage causing a possible safety hazard to operating and maintenance personnel. A procedure has been developed to discharge this high voltage into the dynamic brake grids to prevent the possibility of injury. WARNING

The DC link voltage is present on all equipment connected to the output of the main generator. This includes main generator output terminals and cabling connections, TCC cabinets, Crowbar Inverter Protection Resistors (IPR), DCL switchgear, DCL Reactor and brake grids. THE LOCOMOTIVE OPERATOR SHALL NOT ACCESS ANY DEVICES WITHIN THE #1 ELECTRICAL CONTROL CABINET (ECC1), DUE TO RESIDUAL HIGH VOLTAGE. ACCESS WITHIN ECC1 IS LIMITED TO MAINTENANCE INDIVIDUALS THAT ARE KNOWLEDGEABLE OF THE GT46MAC DC LINK DISCHARGE PROCEDURE.

SAFETY PRECAUTIONS

C-3

NOTE

The #1 ELECTRICAL CONTROL CABINET is also called the HIGH VOLTAGE CABINET. This restriction does not apply to the display panel, the engine control panel, and the circuit breaker panels, which are portions of ECC1 which may be accessed during normal operation. Illustrations appearing on the following two pages show the ECC1 panels, which may be accessed by the locomotive operator.

ECC1 Ref. Drawing 10630492 Cad Art # F41491

Typical Electrical Control Cabinet #1 (showing panels accessed by operator) Note: The Display Panel and Engine Control Panel are mounted on ECC1 doors and are accessible without opening the ECC1 doors. Access to the circuit breaker panels require opening the unlocked top left ECC1 door. These panels are shown in more detail below.

C-4


0

Ref. Photo d97-311 Drawing 40070031

Typical No.1 Circuit Breaker Panel


Typical No.2 Circuit Breaker Panel and Voltage Test Panel

SAFETY PRECAUTIONS

C-5


Typical Engine Control Panel The DC link is discharged automatically by the locomotive operator or maintenance personnel in the normal course of shutting down the unit. Upon engine shutdown, excitation to the main generator is disabled and main generator output voltage will approach zero. In the event of a system failure, even after the engine is stopped, capacitors and phase modules could be at operating voltage. Moving the Isolation switch to ISOLATE causes the DC link voltage to be automatically connected (by EM2000) across the dynamic brake grids causing the DC link energy to be dissipated through the grids. It takes approximately 100 milliseconds for the DC link to be discharged in this manner.

WARNING

Even after the automatic shut down (i.e., in case of failure), TCC cabinet components such as DC Link capacitors, snubber capacitors, grounding capacitors, and phase modules may still be charged at hazardous voltage level. Therefore, additional activities have to take place in the TCC in order to make the AC system safe for inspection and maintenance. If a cut out bogie (inverter) cannot be cut in because of a fault in the computer control system, the DC link shorting test cannot be completed. Follow the GT46MAC discharge procedure.

C-6


0

1.2 GT46MAC Discharge Procedure Flow Chart

GT46MAC Safety Precaution Discharge Procedure Flow Chart (PN 40078060)

SAFETY PRECAUTIONS

C-7

1.3 DETAILED EXPLANATION OF GT46MAC DISCHARGE PROCEDURE FLOW CHART

Flow Chart Box Number

Flow Chart Reference Information

Box 1

Isolation switch is located on engine control panel in the locomotive cab. Turn this switch to the “isolate” position.

Box 2

This decision box is used to identify the scope of work that will be performed. If the work is Low Voltage Electrical or Mechanical in nature, proceed to box 3. If the work is High Voltage Electrical (i.e., Main Generator, ECC1 Red Zone, ECC2, Dynamic Brake Grids, Traction Motor Leads, TCC Cabinets Except For Computer Compartment, Inverter Protection Resistor (IPR), DCL Reactor, High Voltage Cables or DCL Switch Gear) proceed to box 5.

Box 3

This box references the work required. For example, if the work was to replace an injector, the diesel engine must be shutdown. If a headlight was to be changed, the diesel engine may not necessarily be shutdown.

Box 4

This box indicated that work on the Mechanical or Low Voltage Electrical system can proceed as required.

Box 5

This box indicates that the DCL shorting test must be performed. To initialize the test, use the EM2000 display screen, select SELF TEST option. Then, select the DCL SHORTING test and follow instructions as prompted. During this test, the DCL voltage will be charged and discharged as indicated. At the successful conclusion of the test, the voltage will be less than 20 volts. The voltage displayed may not be zero due to the offset of the internal feedback devices.

Box 6

This box indicates to tag the locomotive if the DCL SHORTING test performed in box 5 was not functional or fails. If a TCC is cut out, the test is not functional and will not pass. If the test is run and does not pass, a failure of the system is indicated and additional steps to correct it will be required. Either way, the TCC that will be worked on will need to be shorted and grounded as described on pages 8 through 26 of this document.

Box 7

Isolation switch is located on engine control panel in the locomotive cab. Turn this switch to the “isolate” position.

Box 8

This box instructs the worker to shut down the locomotive diesel engine. Once the diesel engine is shutdown, the DCL voltage will not recharge. Apply a lock to the hinged cover on the prime/start switch or to the EFCO stop switch on the cab start units, and tag the isolation switch in the locomotive cab, indicating to other personnel that the unit must not be started until work being performed on the High Voltage Electrical system is complete. Reference engine start and EFCO engine stop switch illustrations on page 11.

C-8


0 Flow Chart Box Number


Box 9

This box instructs the worker to open the Shorting Cable Access panel (on the TCC). This panel is located directly below the snubber resistor screen just above walkway level on each inverter. On the number one inverter the panel will be on the left side, on the number two inverter it will be on the right side. The panel is secured with six bolts and has a sticker indicating “DANGER HIGH VOLTAGE WITHIN.”

Box 10

This box is used to ground a particular TCC. The grounding procedures are identified in box 10a labeled VOLTAGE TEST AND GROUNDING PROCEDURES. Warning: Before probing, qualify the High Voltage Probe/Meter (p/n 40054122) is functional by applying it to a known voltage such as the locomotive battery knife switch prior to each use. This test is not used to identify the absolute calibration of the probe, but rather to insure that it is functional. If at any time the probing indicates that voltage is greater than 20 volts, STOP and proceed to box 11. For additional information on the procedures see MEASURING AND SHORTING PROCEDURES FOR CAPACITORS, as described on pages 12 through 25 of this document.

Box 10a

VOLTAGE TEST AND GROUNDING PROCEDURE If any voltage measured in this test is greater than 20 volts return to the flow chart and follow the path labeled “If any voltage is greater than 20 volts.” 1. Use the High Voltage Probe/Meter (p/n 40054122) to test for voltage from ground to Terminal P. If voltage is Less than 20 volts, connect 6-Leg External Shorting Cable (p/n 40075113) from Ground to Terminal P. 2. Use the High Voltage Probe/Meter (p/n 40054122) to test for voltage from ground to Terminal N. If voltage is Less than 20 volts, connect 6-Leg External Shorting Cable (p/n 40075113) to Terminal N. 3. Repeat above for Terminals U, V, and W.

Box 11

This box indicates that if greater than 20 volts is present on any terminal it must be discharged using the Discharge Resistor Asm. (p/n 40075115). Once the Discharge Resistor Asm has been applied for 30 seconds, re-probe the terminal, apply the shorting cable clamp and continue using the VOLTAGE TEST AND GROUNDING PROCEDURES referenced in box 10a.

Box 12

This box is used to determine if both TCC are shorted. If work or inspections are limited to the output side of the inverter (i.e., traction motor leads), only the corresponding TCC will need to be externally grounded using the 6-leg External Shorting Cable (p/n 40075113.)

Box 13

This box identifies if both TCCs require external grounding. If work or inspections are required on the High Voltage Electrical systems common to both inverters (i.e., Main Generator, ECC1 Red Zone, ECC2, Dynamic Brake Grids, Traction Motor Leads, TCC Cabinets Except For Computer Compartment, Inverter Protection Resistor (IPR), DCL Reactor, High Voltage Cables or DCL Switch Gear), both TCCs will require the 6-leg External Shorting Cable (p/n 40075113).

SAFETY PRECAUTIONS

C-9

Flow Chart Box Number


Box 14

This box instructs the worker to return to the VOLTAGE TEST AND GROUNDING PROCEDURES when the scope of work being performed is as outlined in box 13.

Box 15

This box is used to determine if work is known to be required internal to the TCC cabinet. This would be the case for example if the faults are identified in the ASG or EM2000 computer indicative of TCC problems or the DCL Shorting test fails.

Box 16

A visual inspection of the TCC is required at each maintenance. A fault on either the ASG or EM2000 computer could also dictate a visual inspection.

Box 17

The TCC cabinet door is secured with twelve 9/16 inch bolts that will need to be removed to provide access to the internal TCC cabinet components. Once the door has been opened, it is important to look for defective connections (especially at each of the DCL capacitors), signs of over-heat and other indications of a problem. At no time should a worker reach into the TCC cabinet while performing a visual inspection. If during the course of the inspection it is determined that work will need to be performed in the cabinet STOP and proceed to box 21.

Box 18

After the visual inspection close the TCC cabinet door and reapply the bolts. This ensures that no one inadvertently accesses a cabinet that has not been prepared for internal work.

Box 19

This box indicates that all High Voltage Electrical system work external to the shorted TCC cabinet(s) and IPR cage(s) can now be performed.

Box 20

The TCC cabinet door is secured with twelve 9/16 inch bolts that will need to be removed to provide access to the internal TCC cabinet components.

Box 21

Once the door has been opened, it is important to look for defective connections (especially at each of the DCL capacitors), signs of over-heat and other indications of a problem. At no time should a worker reach into the TCC cabinet while doing the visual inspection. Test all capacitor voltages as outlined in steps 2, 3 and 4 in the MEASURING AND SHORTING PROCEDURES FOR CAPACITORS. If at any time greater than 20 volts is present on any terminal STOP and proceed to box 22.

Box 22

During the measurement of box 21, if greater than 20 volts is present on any terminal it must be discharged using the Discharge Resistor Asm p/n 40075115. Once the Discharge Resistor Asm has been applied for 30 seconds, verify less than 20 volts remains on the terminal then apply the shorting cable clamp and continue testing using the MEASURING AND SHORTING PROCEDURES FOR CAPACITORS, as described on pages 12 through 25 of this document.

Box 23

This box indicates that all High Voltage Electrical work internal to the shorted TCC cabinet(s) and internal to the IPR cage(s) can now be performed.

C-10


0

Art # F41493.tif

Engine Start Switch (with hinged door open)

Engine Start Switch (with hinged door closed and padlocked)

The two above illustrations are from the 1st India GT46MAC unit.

SAFETY PRECAUTIONS

C-11

2.0 LOCOMOTIVE DISCHARGE SYSTEMS The DC link capacitors are in the TCCs and store large amounts of energy. For example, these capacitors are charged to about 700 VDC when the Isolation switch is in RUN, the throttle is in IDLE and the reverser handle is in forward or reverse. When the reverser is returned to NEUTRAL that 700 volts remains until some device or system discharges it. Other components, such as snubber capacitors, grounding capacitors, and phase modules with lower amounts of stored energy are also operating at voltages up to 3400 VDC and need to be discharged to allow for maintenance. The capacitors in the TCCs can be discharged automatically and manually. NOTICE

There are 3 general ways to discharge the DC link capacitors and other components prior to servicing, plus a 4th method to maintain the short: 1. Through the bleeder resistors internal to the TCC cabinets, discharge time 50 minutes. 2. Through the dynamic brake grids by way of the DCL switchgear, discharge time less than 100 milliseconds. 3. Through a hard crowbar as provided by the inverter equipment, discharge time less than 10 microseconds. 4. The DCL switchgear moves to the OPEN position to place a short circuit across the TCC DC input cables once the components are discharged.

2.1 MEASURING AND SHORTING PROCEDURE FOR CAPACITORS WARNING

For maximum safety wear high voltage gloves (>4000 V DC) during the measuring and grounding process. TCC cabinet components such as DC Link Capacitors, Snubber Capacitors, Grounding Capacitors and Phase Modules can exceed 3400 volts. Common voltmeters CAN NOT withstand this voltage. For voltage measuring, use High Voltage Probe/Meter (p/n 40054122). Capacitors must be stored, transported, and handled with a short circuit wire applied between the terminals and the grounding plate. If a stored capacitor does not have a short circuit wire, it should be handled as if it were electrically charged.

C-12


0

2.1.1. General Rules of Grounding and Shorting Philosophy Before grounding and shorting, the absence of voltage on the respective terminals must be checked. If the measured voltage is higher than 20 volts, the Discharge Resistor Assembly needs to be applied until the voltage has dropped below at least 20 volts. The following 5 general rules need to be followed, especially if the qualified personnel encounters a situation where the dedicated GT46MAC Safety Rules may not cover the situation safely: 1. Switch off the power source. 2. 3. 4. 5.

Prevent re-closing of switches. Check absence of voltage. Apply grounding and shorting cables. Protect adjacent live parts by covers or barriers.

If there are questions on the five general rules above, please request additional assistance.

2.1.2 Dedicated GT46MAC Rules of Grounding and Shorting Philosophy Automatic Discharge After a normal shutdown of the locomotive, the Automatic Discharge System (Bleeder Resistors, Brake Grids, Crowbar, DCL-Switch) normally will have discharged all capacitors within the inverters. Although it is a multiple redundant system, in worst case all subsystems may fail. The other problem is that the discharge devices can work only, if there is a proper connection between the possibly still charged voltage source (capacitors) and the discharge devices (Bleeder Resistors, Brake Grids, Crowbar, DCL-Switch). Therefore it can not be guaranteed that the Automatic Discharge System has discharged all capacitors inside the TCC’s and manual voltage checking, grounding and shorting is still necessary. Manual Discharge • If work on the high voltage equipment inside or outside the inverter needs to be done, the 6-Leg Shorting Cable in the External Access Panel needs to be installed. • If work (visual inspection not included) inside the inverter needs to be done, the 4-Leg Shorting Cable for the Main Bus needs to be installed. • The 7-Leg Shorting Cable for the Grounding Capacitors needs to be installed only if work needs to be done on these capacitors or in their immediate vicinity. • The 7-Leg Shorting Cable for the Phase Modules needs to be installed only if a Phase Module needs to be exchanged or if cables or busbars connected to it need to be disconnected. The other two Phase Modules need not be grounded and shorted as long as their connection to the Main Bus is proper. • For the exchange of a Gate Unit, Phase Modules need not be grounded and shorted as long as the connection to the Main Bus is proper and the External Access Panel is properly grounded and shorted.

SAFETY PRECAUTIONS

C-13

Use of High Voltage Gloves The wearing of high voltage gloves is recommended whenever handling capacitors of significant voltage or working with a high voltage source. The gloves provide an additional degree of safety and should be used in conjunction with Shorting Cables on the GT46MAC high voltage systems. The purpose of the Shorting Cables is the protection of the worker in case voltage is coming unexpectedly into the work space, although the absence of voltage had been confirmed before. This could happen, for example, if there is an intermittent contact inside a capacitor. Due to the physical restrictions inside the inverters, there is no access to the capacitors (with the exception of the grounding capacitor) and thus direct shorting and grounding is not possible. Instead, the grounding and shorting of the Main Bus discharges all capacitors, as long as the connections to the Main Bus are solid. In the event an unsafe situation arises where a DC Link capacitor’s connections to the Main Bus are in question or show obvious signs of being unable to perform there desired function of shorting the capacitors (i.e. signs of arching, smoke or heat generated discoloration) then HIGH VOLTAGE GLOVES MUST BE WORN THROUGHOUT THE CAPACITOR REMOVAL PROCESS. The need for safety far out weighs the insignificant disadvantages involved in wearing the gloves (i.e. dropping nuts and washers to the bottom of the inverter). Even after voltage measurement, discharge with the Discharge Resistor Assembly, or the uncontrolled discharge brought on by an accident or failure of a capacitor connection, a DC Link capacitor could store voltage because of intermittent connections inside the capacitor. Therefore, it is critical that the terminals of a DC Link capacitor be treated as charged any time they are not grounded or shorted. WARNING

Never leave a DC Link capacitor unattended without a shorting wire or cable across the terminals. There are only two instances when high voltage gloves need NOT be worn when working with DC Link capacitors and those are: 1. When disconnecting the hardware which connects the capacitor terminals to the Main Bus and preparing for capacitor removal from a TCC cabinet. This can only be done after the visual inspection has confirmed the integrity of the connections and the proper grounding cables have been applied internally and externally to the TCC cabinet. 2. When Handling a DC Link capacitor that has been probed and has a shorting wire or cable firmly attached across the terminals. Please request additional assistance from qualified personnel prior to proceeding if any questions or concerns arise when working with capacitors or within the TCC cabinets. C-14


0

2.2 AUTOMATIC DISCHARGE The DCL Voltage is discharged automatically, when the locomotive operator takes manual action to shut down the locomotive. There are 3 general ways to discharge the DC link capacitors and other components prior to servicing, plus a 4th method to maintain the short: 1. Through the bleeder resistors internal to the TCC cabinets, discharge time 40 minutes. 2. Through the dynamic brake grids by way of the DCL switchgear, discharge time less than 100 milliseconds. 3. Through a hard crowbar as provided by the inverter equipment, discharge time less than 10 microseconds. 4. The DCL switchgear moves to the OPEN position to place a short circuit across the TCC DC input cables once the components are discharged. These automatic systems have multiple redundancy, i.e. if the Bleeder Resistors don’t work, the Brake Grids will discharge the DC-Link anyway. If the brake grids do not work, the Hard Crowbar will take care of the discharge. In certain conditions even the DCL-Switchgear will shorten and thus discharge the DCLink. On the other hand each of these systems can fail without being noticed by personnel or the monitoring systems, since they are not used in power mode. Additionally, a solid connection between the discharge device and the capacitors is essential, otherwise the short circuit will not discharge the capacitors.

2.2.1 Reverser In Center Position (Bleeder Resistors) Each TCC cabinet has two 68 KΩ bleeder resistors in series across the DC link capacitors. When the locomotive operator moves the reverser from forward or reverse to centered, main generator excitation stops. If no further action is taken the bleeder resistors will discharge the DC link from 3400 VDC to about 20 VDC in approximately 50 minutes. Although very reliable, the bleeder resistors do not guarantee the discharge, since the resistors could be interrupted internally or the external connection to the capacitors could be interrupted.

2.2.2 Isolation Switch In ISOLATE (Dynamic Brake Grids) The normal way to discharge the DC link capacitors is through the two dynamic brake grids in parallel. When the locomotive operator turns Isolation Switch from RUN to ISOLATE (or the EM2000 loses the RUN input signal), the parallel brake grid path is connected to the DC link by four contactors (B1,B2,B3,B4). This method discharges the DC link capacitors in less than 100 millisecond. NOTE

If the braking grids were shorted out or grounded, or one grid had burned open, the grids would still discharge the DC link. Only if both grid circuits burned open would the DC link not be discharged by this method. SAFETY PRECAUTIONS

C-15

2.2.3 Diesel Engine Shutdown Battery Knife Switch (Crowbar Thyristor) A “hard crowbar” is a term for a protective function that effectively shorts a device or circuit as if a “crowbar” was placed across its output terminals. The hard crowbar applies a dead short to the DC link capacitors through a SCR, causing the capacitors voltage to go to zero. The dead short is removed when the capacitor voltage reaches zero and no permanent short circuit is left on the capacitors by the hard crowbar. Two conditions that cause the ASG control system to apply a hard crowbar to the DC link capacitors are: • •

Loss of 24 VDC Supply - Shutting down of the diesel engine causes a loss of the 24 VDC supply. Loss of 74 VDC Supply - Opening of the COMPUTER CONTROL or LOCAL CONTROL circuit breaker causes a loss of the 74 V supply.

When the locomotive operator shuts down the diesel engine or pulls the battery knife switch, (or trips the COMPUTER CONTROL or LOCAL CONTROL circuit breaker), the loss of 24 VDC for the GTO power supply and the loss of 74 VDC to the Traction Control Computer is detected and the Hard Crowbar is fired as the control systems last act, before power is completely lost. Although the crowbar system is very reliable and can be tested with the Inverter Protection Test, it can fail (e.g. when a wire for the firing pulse is interrupted). NOTE

The ASG system applies the hard crowbar to the DC link (TCC) capacitors whenever a drop in either the 74 or 24 volt supply is detected as the control system’s last act before power is completely lost. This short-circuit condition can produce a loud “abrupt” noise when the COMPUTER CONTROL or LOCAL CONTROL circuit breaker is opened.

2.2.4. DCL-Switch Gear / Shorting Logic After the DC link has been discharged by either the braking grids or the crowbar, the DCL switchgear is cycled to the OPEN position. Cycling the DCL switchgear to OPEN causes both TCCs to be shorted and grounded with a heavy busbar connected to front contacts of the DCL. A. When the engine is shut down (regardless of Isolation Switch position), the ASG control system applies a hard crowbar at each TCC and the EM2000 control will pick up the B contactors. In this way, four different DC link capacitor discharge paths are provided. Once the DC link capacitors are discharged, DCL is driven to the shorted position. B. When either the battery knife switch or Local Control breaker is open, the 74 V power supply circuit is lost causing the ASG control system to apply a Hard Crowbar at each TCC. The EM2000 detects the loss of Local Control or open knife switch and moves DCL to the shorted position.

C-16


0 .

NOTE

The EM2000 can still control the DCL motor (to short out the DC link capacitors) even though the battery knife switch is open because DCL is powered directly across the battery and the EM2000 is powered (MCB/COMPUTER CONTROL CB) by TLPR #1 contacts after engine shutdown. If the COMPUTER CONTROL circuit breaker is opened and the engine then shut down, the DCL will not be driven to the shorting position. However, the ASG control system will apply a hard crowbar at both TCCs to discharge the DC link as soon as the COMPUTER CONTROL circuit breaker is opened. TO ENSURE THE DCL IS ALWAYS DRIVEN TO THE SHORTING POSITION, DO NOT OPEN THE COMPUTER CONTROL CIRCUIT BREAKER AND THEN SHUT DOWN THE ENGINE. When an inverter is in CUT-OUT position, the DC Link for that inverter is not shorted since the DCL switch is in the middle position. After DCL is in the Shorting Position and the engine is shut down, there are only two ways the switchgear could unintentionally move out of the Shorted Position: 1. Through a failure of the EM2000 software. 2. Through a failure of the DIO output channel Item 1 is unlikely because after the knife Switch is pulled, the EM2000 shuts off after the turbo lube pump times out. Item 2 can be eliminated as a problem by opening the DCL Circuit Breaker, although the HVC cabinet door release is then disabled.

SAFETY PRECAUTIONS

C-17

2.3 MANUAL DISCHARGE 2.3.1 Grounding And Shorting Cable For External Access Panel Use the High Voltage Probe/Meter (p/n 40054122). Make sure that it is in the 2 VDC range because the probe has an attenuation of 1000:1. For example, if you read 1.5 V on your meter, there is 1500 V on the measuring point. Verify the proper function of the voltmeter by measuring a known voltage source such as the locomotive battery. 2.3.1.1 Grounding Point Connect the leg Ground of the 6-Leg External TCC Shorting Cable (p/n 40075113) to the grounding bolt on the left hand side of the access panel. Attach the alligator clip of the High Voltage Probe to the ground clamp of the shorting cable. 2.3.1.2 Measuring Voltage On Point P Measure the voltage between the grounding bolt and terminal P. If the voltage is less than 20 V DC, attach the leg P of the shorting cable to terminal P. If it is more than 20 V DC, connect the Discharge Resistor Asm. (p/n 40075115) between those two points for at least 30 seconds and then repeat the voltage measurement. Do not proceed to other terminals, until the short circuit connection between Ground and P is done. 2.3.1.3 Measuring Voltage On Point N Measure the voltage between the grounding bolt and terminal N. If the voltage is less than 20 V DC, attach the leg N of the shorting cable to terminal N. If it is more than 20 V DC, then refer to section 2.3.1.2 2.3.1.4 Grounding and Measuring Voltage On Points U, V, and W Repeat the steps of measuring and shorting between Ground and the terminals U and V and W in the same way as described in section 2.3.1.2 and 2.3.1.3. 2.3.1.5 Short Circuit Connection Leave this short circuit connection in place and remove the High Voltage Probe/Meter.

C-18


0

-11.tiff

SHORTING CABLE ACCESS PANEL - MEASURING POINT

EXTERNAL ACCESS PANEL WITH GROUNDING CABLES

SAFETY PRECAUTIONS

C-19

2.3.2 Grounding and Shorting Cable for the Main Bus There is no direct access possible to capacitors C1 ... C8 and C21 ... C24 since there are busbars, cables and Gate Units in the way. On the other hand, there is sufficient space (more than 1 foot) between the work area and those capacitors in case of Phase Module or Gate Unit exchange. Therefore the 4-Leg Main Busbar Shorting Cable (p/n 40075112) will not be applied to those capacitors directly, but to the “Main Bus” (also called the “vertical bus” and the “low inductance bus”). Use the High Voltage Probe/Meter (p/n 40054122). Make sure that it is in the 2 V DC range because the probe has an attenuation of 1000: 1. Example: If you read 1.5 V on your meter, there is 1500 V on the measuring point. Verify the proper function of the voltmeter by measuring a known voltage source such as the locomotive battery. Make sure by visual inspection that there are no loose connections on the bottom of the Main Busbar. 2.3.2.1 Grounding Point Connect the leg Ground of the 4-Leg Main Busbar Shorting Cable (p/n 40075112) to the 5/16 inch grounding stud at the left hand bottom front of the inverter. Attach the alligator clip of the high voltage probe to the ground clamp of the shorting cable. 2.3.2.2 Measuring Voltage On Point P Measure the voltage between the grounding stud and the busbar with the label MEASURING POINT “P”. If the voltage is less than 20 V DC, attach the P leg of the shorting cable to this busbar. If it is more than 20 V DC, connect the Discharge Resistor Asm. (p/n 40075115) between those two points for at least 30 seconds and then repeat the voltage measurement. Do not proceed to other terminals, until the short circuit connection between Ground and this busbar is done. 2.3.2.3 Measuring Voltage On Point R Measure the voltage between the grounding bolt and the busbar with the label MEASURING POINT “R”. If the voltage is less than 20 V DC, attach the R leg of the shorting cable to this terminal. If it is more than 20 V DC, then refer to the section 2.3.2.2. 2.3.2.4 Measuring Voltage On Point N Measure the voltage between the grounding stud and the busbar with the label MEASURING POINT “N”. If the voltage is less than 20 V DC, attach the N leg of the shorting cable to this terminal. If it is more than 20 V DC, then refer to the section 2.3.2.2. 2.3.2.5 Short Circuit Connection Leave this short circuit connection in place and remove the High Voltage Probe/Meter.

C-20


0

NOTE

If the 4-Leg Shorting Cable is in the way of work (e.g. if the lowest Phase Module needs to be exchanged), it is perfectly OK to move the shorting cable to equivalent busbars located higher on the Main Bus. For a detailed description to remove DC Link and Snubber Capacitors, refer to the relevant section of the GT46MAC Traction Inverter Service Manual.

Measuring Points for DC-Link and Snubber Capacitors

DCL Grounding Cables

SAFETY PRECAUTIONS

C-21

2.3.3 Grounding and Shorting Cable for Grounding Capacitors The 7-Leg Shorting Cable needs to be installed only, if work needs to be done on these capacitors or in their immediate vicinity. Use the High Voltage Probe/Meter (p/n 40054122). Make sure that it is in the 2 V DC range because the probe has a attenuation of 1000: 1. Example: If you read 1.5 V on your meter, there is 1500 V on the measuring point. Verify the proper function of the voltmeter by measuring a known voltage source such as the locomotive battery. 2.3.3.1 Grounding Point Connect the leg Ground of the 7-Leg Grounding Capacitor Shorting Cable (p/n 40075114) to the left-most vertical cable cleat stud on the ceiling of the inverter. Attach the alligator clip of the high voltage probe to the ground clamp of the shorting cable. 2.3.3.2 Measuring Voltage On C15 (Left-Hand Terminal) Measure the voltage between the grounding point and the left-hand terminal of C15. If the voltage is less than 20 V DC, attach one leg of the shorting cable to the left hand terminal of capacitor C15. WARNING

Make sure that the grounding clamp is connected to the metal cap and not to the ceramic body of the insulator nor to any painted metal. If it is more than 20 V DC, connect the Discharge Resistor Asm. (p/n 40075115) between those two points for at least 30 seconds and than repeat the voltage measurement. Do not proceed to other terminals, until the short circuit connection between Ground and this terminal is done. 2.3.3.3 Measuring Voltage On C15 (Right-Hand Terminal) Measure the voltage between the grounding point and the right-hand terminal of capacitor C15. If the voltage is less than 20 V DC, attach the next leg of the shorting cable to this terminal. If it is more than 20 V DC, then refer to the section 2.3.3.2. 2.3.3.4 Voltage Measurements On C11 and C12 Repeat the steps of measuring and shorting between Ground and the terminals of the capacitors C11 and C12 in the same way as described in section 2.3.3.2 and 2.3.3.3. 2.3.3.5 Short Circuit Connection Leave this short circuit connection in place and remove the High Voltage Probe/Meter.

C-22


0

MEASURING POINTS FOR GROUNDING CAPACITORS

SAFETY PRECAUTIONS

C-23

Tiff #4 (GRDCAP 2)

GROUNDING CAPACITORS WITH GROUNDING CABLES

2.3.4 Grounding and Shorting Cable for the Phase Modules The 7-Leg Shorting Cable for the Phase Modules needs to be installed only if a Phase Module needs to be exchanged or if cables or busbars connected to it need to be disconnected. The other two Phase Modules need not be grounded and shorted as long as their connection to the Main Bus is proper. For the exchange of a Gate Unit, the Phase Modules need not be grounded and shorted as long as their connection to the Main Bus is proper. Before the 7-Leg Shorting Cable can be installed, the 4-Leg Shorting Cable for the Main Bus and the 6-Leg Shorting Cable on the External Access Panel has to be installed (refer to chapters 2 and 3). Inside each Phase Module are 6 capacitors, thus there is no direct access possible to these capacitors. The 7-Leg Phase Module Shorting Cable (EMD p/n 40075117) cannot be applied to those capacitors directly, but can be applied to the 6 busbars coming out of each Phase Module. Before the Phase Module can be exchanged, the Gate Unit has to be removed. After the visual inspection has shown that the connections on the Phase Module terminals and the Main Bus are solid, the Gate Unit can be disconnected and removed. After the Gate Unit is gone, there is sufficient space for, grounding and shorting of the Phase Module.

C-24


0

2.3.4.1 Grounding Point Connect the leg “Ground” of the 7-Leg Phase Module Shorting Cable (EMD p/n 40075117) to the grounding bolt on the right hand side of the metal collar around the Phase Module. 2.3.4.2 Busbar Connections Attach the legs “1” through “6” to the respective terminals on the Phase Module. Probing is not necessary, since the Shorting Cable on the Main Bus and on the External Access Panel has discharged possible voltage inside the Phase Module. The cable must be placed on the busbar on the face plate of the Phase Module so it still provides shorting and grounding protection after the cables and the external busbars to the Phase Module are removed (in case of a Phase Module exchange). 2.3.4.3 Short Circuit Connection Leave this short circuit connection in place while the Phase Module is being removed and in the warehouse as well, since voltage could come out unexpectedly.

Phase Module Internal Capacitor - Measuring Points

SAFETY PRECAUTIONS

C-25

Phase Module With Grounding Cable

C-26


0

2.4 REMOVAL PROCEDURE FOR CAPACITORS NOTE

For a detailed procedure of removing TCC capacitors (DC Link Capacitors, Snubber Capacitors, Grounding Capacitors, and Phase Modules With Internal Capacitors) see Traction Converter Cabinet Operating Instructions, Chapter 3.

2.4.1 DC Link Capacitor Removal The following procedure should be used to remove a DC Link Capacitor: 1. Attach 6-Leg External Shorting Cable (p/n 40075113), probe inverter, and attach inside 4-Leg Shorting Cable (p/n 40075112). 2. Visually inspect DC link capacitor for signs of damage and to verify proper connection to Main Bus. 3. With a Differential High Voltage Meter (p/n 40075116), probe each of the 8 capacitor between their two terminals and each terminal against ground. Use Discharge Resister Assembly (p/n 40075115) to dissipate residual voltage if necessary. 4. Prepare back of inverter for removal of capacitor. 5. Disconnect capacitor from Main Bus. 6. Wearing high voltage gloves, remove capacitor from inverter. 7. Once capacitor is removed, probe it an attach shorting strap to capacitor terminals. 8. With the defective capacitor and new capacitor shorted, the gloves can be removed. 9. Remove mounting brackets from old capacitor and attach to the new capacitor. 10. Wearing high voltage gloves, remove the shorting strap from the new capacitor and slide it into place. 11. Once the new capacitor is in place, the gloves can be removed and the washers and nuts attached to secure the capacitor.

2.4.2 Removal of Grounding Capacitors (C11, C12, or C15) If work is to be performed that requires removal of a grounding capacitor: 1. Remove the two legs of the 7-Leg shorting cable from the capacitor to be removed. 2. Disconnect the wires from both terminals of the capacitor. 3. Apply a suitable shorting wire or jumper to the terminals of the capacitor as soon as the terminals are accessible. Avoid any unnecessary contact with the capacitor terminals before and after the shorting wire or jumper has been applied. 4. Proceed with the removal of the capacitor. Reinstallation would follow the same process in reverse where the shorting wire or jumper on the terminals would be left intact until the capacitor is ready to be connected to the wires inside the TCC cabinet. If questions arise from this procedure please seek technical assistance from qualified personnel.

SAFETY PRECAUTIONS

C-27

3.0 SPECIAL SITUATIONS 3.1 RUNNING GEAR PIT INSPECTION If a pit inspection on a GT46MAC does not involve inspection of traction motor high voltage electrical connectors, then isolate the unit. An AC traction motor with reverser centered and Isolation Switch in RUN has no voltage applied to it unless there is a fault inside a TCC cabinet and the DC Link is charged. Thus a dangerous situation can occur if each of the following three conditions are present at the same time. 1. The DC Link is charged (Isolation Switch in RUN) 2. A TCC fault is present 3. There exist broken or cracked insulation. Of the 3 conditions listed above only condition #1 is easily verifiable from inside the locomotive cab. WARNING

This is applicable to inspections only. If truck repairs or motor change-outs are to be made then refer to DC link discharge procedure. All workers should report any cable damage to a supervisor or other qualified individuals and stop any work or inspection on that locomotive. Disposition should be made by the qualified personnel prior to commencing any work or inspection.

3.2 PINION CUTTING PROCEDURE Observe GT46MAC Discharge Procedure and handle pinion cutting as a Mechanical item in Maintenance.

3.3 IN-FIELD TRACTION MOTOR CHANGEOUT PROCEDURE If a traction motor(s) require changeout in the field, it must be handled as if it was being replaced in a repair facility. Follow instructions as outlined in the GT46MAC Discharge Procedure Flowchart (Chapter 1.2) and manual discharge (Chapter 2.3).

C-28


0

4.0 GLOSSARY OF TERMS ABBREVIATIONS • ASG - Traction Control Computer • DCL - DC link • IPR - Inverter Protection Resistor • TCC - Traction Converter Cabinet • SCR - Silicon Controlled Rectifier Before performing work on any of the 9 items listed below refer to GT46MAC discharge procedures. Traction Converter Cabinets (TCC1,TCC2) - The TCCs house the DC link capacitors. TCC1 is for truck 1, TCC2 is for truck 2. NOTE

A TCC computer door can be opened without danger as there is only 24 VDC and 74 VDC circuits inside that part of the TCC. The TCC computer circuit breaker must be switched off before any TCC computer modules are removed. DCL Capacitors - Each TCC cabinet contains eight DCL capacitors. These capacitors are tied to a common busbar and can exceed 3400 V. Main Generator - DC Link voltage is present when Isolation switch is in RUN and the TCCs {DC LINK capacitors} are charged up. This voltage is normally dissipated when the Isolation Switch is put in ISOLATE. Brake Grids - The brake grids are one of the methods used to discharge the DC link capacitors. IPR/Damper Resistors - The #1 IPR/Damper is mounted on the Inertial Filter Compartment wall, while #2 IPR is mounted on the end of the engine radiators above the water pumps or on top of the #2 TCC cabinet. These are behind wire screens and at positive potential (+300 to +1300 V) above ground whenever the DC link is charged. These dampers are discharged when the DC link capacitors are discharged. High Voltage Cabinet - DC link voltage is present in the “red zone” (voltage feedbacks to the EM2000 and the Ground Relay circuit) and in the cabling to the B and DCL switchgear. The door interlock prevents the doors from opening while the Isolation Switch is in RUN. When placed in ISOLATE, the DC link is normally discharged and the high voltage cabinet doors can be opened, but no device in the red zone should be touched. Care should be taken if the Isolation Switch is placed in RUN for testing purposes with the doors open. Traction Motors - Traction motors are connected to the TCCs and at idle have no voltage across them unless a fault has occurred in the TCC. DC Link Reactor - The DC link reactor is located under a metal enclosure in the Inertial Filter compartment. This reactor is electrically between the High Voltage (#1) Cabinet and the #2 Traction Converter Cabinet TCC2. Low Voltage Electrical - Low voltage electrical includes control circuits which are powered by the 64 VDC locomotive battery, by 74 VDC auxiliary generator output, and circuits which are powered by 230 VAC companion alternator output. SAFETY PRECAUTIONS

C-29

5.0 LIST OF TOOLING Special Tools High Voltage Probe/Meter - - - - - - - - - - - - - - - - - - - - - - - - - - - - Differential HV Meter- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Discharge Resistor Asm. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-Leg DCL Capacitor Shorting Wire - - - - - - - - - - - - - - - - - - - - - 4-Leg Main Busbar Shorting Cable - - - - - - - - - - - - - - - - - - - - - - 6-Leg External TCC Shorting Cable - - - - - - - - - - - - - - - - - - - - - 7-Leg Grounding Capacitor Shorting Cable - - - - - - - - - - - - - - - - 7-Leg Phase Module Shorting Cable - - - - - - - - - - - - - - - - - - - - - DCL Capacitor Cover - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

C-30


Part # 40054122 40075116 40075115 40075111 40075112 40075113 40075114 40075117 40075118

0

6.0 LIST OF SAFETY NAMEPLATES Nameplate

Part #

Outside TCC Cabinet:

Danger-High Voltage - - - - - - - - - - - - - - 40075120 Shorting Cable Access Panel - - - - - - - - 40075121 Electrical Control Cabinet: GT46MAC Discharge Flow Chart - - - - - 40078060 Inside TCC Cabinet: DC Link Negative - - - - - - - - - - - - - - - - 40055250 DC Link Positive - - - - - - - - - - - - - - - - 40055251 Danger-High Voltage - - - - - - - - - - - - - 40075120

SAFETY PRECAUTIONS

C-31

C-32


0

Appendix D. TROUBLESHOOTING FLOWCHARTS

TROUBLESHOOTING FLOWCHARTS D-1

Appendix D-2


0


Appendix D-4


0


PROCEDURES FOR DETECTING LOW VOLTAGE AND AC GROUNDS EQUIPMENT REQUIRED •

15 Watt 74 Volt Test Light

•

If locomotive is equipped with a DVR, a paper clip is needed to access the test points

PROCEDURE LOW VOTLTAGE GROUNDS Before testing the locomotive for low voltage grounds, make certain that the unit is isolated from other locomotives. Disconnect the front and rear MU jumper cables if MU’d to another locomotive. While checking for low voltage grounds, it is imperative that the 15 Watt test light be used. 1. Close all the circuit breakers.

Troubleshooting Tip Before checking for low voltage grounds, verify the operation of the test light by applying the leads to the positive and negative sides of the Battery Knife Switch Test Points.

Appendix D-6


0

WARNING If the procedure is performed with a meter, there will usually be some sort of voltage detected and often will result in hours of useless troubleshooting. Only use a meter to qualify the wiring after the circuit with the low voltage ground has been identified with the test light.

PROCEDURE FOR AUX. GEN. AC GROUNDS The aux. gen. supplise power for several accessories. Generally, most locomotive orders have accessories that include the HVAC (heater), heated windows and GTO power supplies. However, other orders may have more accessories than previously mentioned. Refer to the appropriate locomotive schematic for accessories within the aux. gen. circuit. Currently, there are several regulation devices used to control the aux. gen. output (a DVR is used on the GT46MAC). The aux. gen. circuit should be inspected for grounds per the following steps. 1. Start the locomotive 2. Apply one of the leads (dont’t worry about the polarity) to test point phase A if equipped with a DVR. Place the remaining lead to ground. 3. Turn on all the accessories found in the appropriate locomotive schematic. The test light should not illuminate. 4. Repeat steps 2 and 3 for the remaining test points on the DVR (phases B and C)

PROCEDURE FOR AC GROUNDS The companion alternator’s output (stator) windings produce voltage for both accessory loads and main generator excitation. Depending on locomotive order, the CA meets the demands of accessory loads such as cooling fans, TCC blower motor’s, TCC electronics blower and inertial filter blower motor. The MG field excitation is obtained by tapping off of the output windings.

Figure 0-1.Test Point Location


1. At the circuit breaker and test panel compartment, locate the yellow test point marked as “ALT VOLTS (AUX)-Companion Alternator Volts”.

NOTE: Before ferforming the following test procedures found in steps 2, 3 and 4 verify the voltage output by first connecting a voltmeter instead of the test lamp. If the voltage at any time raises above the rated voltage of the test lamp,, do not perform this procedure. 2. At the “ALT VOLTS (AUX)”, insert one end of the light bulb lead into TP7. Connect the other end of the 15W light-bulb jumper to ground. Perform the following tests from the self-test menu (make sure to wait for all contactors in the respective circuit to pick up low/high): • TCC Blower Test • Cooling Fan Test 3. Repeat step 2 in a similar fashion for TP8 & TP9. The test lights should not come ON during any part of this test. 4. Check the Excitation circit by setting the locomotive up in throttle one stall condition

CAUTION: All safety rules relavent to securing a locomotive against movement must be observed. •

apply the handbrake

•

make a full independant brake application. Connect the test lamp as per steps 2 and 3. The test light should not come on during any part of this test.

Appendix D-8


0


Appendix D-10


0


Appendix D-12


0


Appendix D-14


0


Appendix D-16


0


Appendix D-18


0


Appendix D-20


0


Appendix D-22


0


Appendix D-24


0


Appendix D-26


0


Appendix D-28


0


Appendix D-30


0


Appendix D-32


0


Appendix D-34


0


Appendix D-36


0


Appendix D-38


0


Appendix D-40


0


Appendix D-42


0


Appendix D-44


0


Appendix D-46


0


Appendix D-48


0


Appendix D-50


0


Appendix D-52


0


Appendix D-54


0


Appendix D-56


0


Appendix D-58


0


Appendix D-60


0


Appendix D-62


0


Appendix D-64


0


Appendix D-66


0


Appendix D-68


0


Appendix D-70


0


Appendix D-72


0


Appendix D-74


0


Appendix D-76


0


Appendix D-78


0


Appendix D-80


0


Appendix D-82


0


Appendix D-84


0


Appendix D-86


0


Appendix D-88


Service Manual EMD

Recommend Documents