01- CJX Interposing Relay Set

CJX Interposing Relay Set Instruction Manual

NR Electric Co., Ltd.

Preface

Preface Introduction This guide and the relevant operating or service manual documentation for the equipment provide full information on safe handling, commissioning and testing of this equipment. Documentation for equipment ordered from NR is dispatched separately from manufactured goods and may not be received at the same time. Therefore, this guide is provided to ensure that printed information normally present on equipment is fully understood by the recipient. Before carrying out any work on the equipment, the user should be familiar with the contents of this manual, and read relevant chapter carefully. This chapter describes the safety precautions recommended when using the equipment. Before installing and using the equipment, this chapter must be thoroughly read and understood.

Health and Safety The information in this chapter of the equipment documentation is intended to ensure that equipment is properly installed and handled in order to maintain it in a safe condition. When electrical equipment is in operation, dangerous voltages will be present in certain parts of the equipment. Failure to observe warning notices, incorrect use, or improper use may endanger personnel and equipment and cause personal injury or physical damage. Before working in the terminal strip area, the equipment must be isolated. Proper and safe operation of the equipment depends on appropriate shipping and handling, proper storage, installation and commissioning, and on careful operation, maintenance and servicing. For this reason, only qualified personnel may work on or operate the equipment. Qualified personnel are individuals who: 

Are familiar familiar with with the installation, commissioning, and operation of the equipment and of the system to which it is being connected;



Are able to safely perform switching operations in accordance accordance with accepted safety engineering practices and are authorized to energize and de-energize equipment and to isolate, ground, and label it;



Are trained in the care and use of safety apparatus in accordance with safety engineering practices;



Are trained in emergency procedures (first aid).

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CJX Interp Interp osin g Relay Set Set Date: 2012-03-29 2012-03-29

Preface

Instructions and Warnings The following indicators and standard definitions are used: DANGER! It means that death , severe personal injury, or considerable equipment damage will occur if safety precautions are disregarded. WARNING! It means that death, severe personal, or considerable equipment damage could occur if safety precautions are disregarded. CAUTION! It means that light personal injury or equipment damage may occur if safety precautions are disregarded. This particularly applies to damage to the device and to resulting damage of the protected equipment. WARNING! The firmware may be upgraded to add new features or enhance/modify existing features, please make sure that the version of this manual is compatible with the product in your hand. WARNING! During operation of electrical equipment, certain parts of these devices are under high voltage. Severe personal injury or significant equipment damage could result from improper behavior. Only qualified personnel should work on this equipment or in the vicinity of this equipment. These personnel must be familiar with all warnings and service procedures described in this manual, as well as safety regulations. In particular, the general facility and safety regulations for work with high-voltage equipment must be observed. Noncompliance may result in death, injury, or significant equipment damage. DANGER! Never allow the current transformer (CT) secondary circuit connected to this equipment to be opened while the primary system is live. Opening the CT circuit will produce a dangerously high voltage. WARNING!

ii

CJX Interposin g Relay Set Date: 2012-03-29 2012-03-29



Preface

Exposed terminals

Do not touch the exposed terminals of this equipment while the power is on, as the high voltage generated is dangerous 

Residual voltage

Hazardous voltage can be present in the DC circuit just after switching off the DC power supply. It takes a few seconds for the voltage to discharge. CAUTION! 

Earth

The earthing terminal of the equipment must be securely earthed 

Operating environment

The equipment must only be used within the range of ambient environment detailed in the specification and in an environment free of abnormal vibration. 

Ratings

Before applying AC voltage and current or the DC power supply to the equipment, check that they conform to the equipment ratings. 

Printed circuit board

Do not attach and remove printed circuit boards when DC power to the equipment is on, as this may cause the equipment to malfunction. 

External circuit

When connecting the output contacts of the equipment to an external circuit, carefully check the supply voltage used in order to prevent the connected circuit from overheating. 

Connection cable

Carefully handle the connection cable without applying excessive force.

iii


Preface

Copyright Version: R1.02

NR ELECTRIC CO., LTD. 69 Suyuan Avenue. Jiangning, Nanjing 211102, China

P/N: EN_CZXL0107.0086.0003 EN_CZXL0107.0086.0003

Tel: +86-25-8 7178185,

Fax: +86-25-87 178208

Website: www.nrelect.com , www.nari-relays.com Copyright © NR 2012. All rights reserved

Email: [email protected] [email protected]

We reserve all rights to this document and to the information contained herein. Improper use in particular reproduction and dissemination to third parties is strictly forbidden except where expressly authorized. The information in this manual is carefully checked periodically, and necessary corrections will be included in future editions. If nevertheless any errors are detected, suggestions for correction or improvement are greatly appreciated. We reserve the rights to make technical improvements without notice.

iv


Table Table of Content s

Table of Contents Preface .......................... ....................................... .......................... ........................... ........................... .......................... ...................... ......... i Introduction ................................................................................................................ i Health and Safety ....................................................................................................... i Instructions and Warnings .......................... ............ .......................... .......................... ........................... .......................... ...................... ......... ii

Table of Contents .................................................................................... i 1 Introduction .......................... ....................................... .......................... ........................... ........................... ....................... .......... 1 1.1 Application.......................... ............. .......................... .......................... .......................... .......................... .......................... ........................... ................ .. 1 1.2 Function ......................... ............ ........................... ........................... .......................... .......................... .......................... .......................... .................... ....... 1 1.3 Features Features ......................... ............ ........................... ........................... .......................... .......................... .......................... .......................... .................... ....... 1 1.4 Product Type ....................................................................................................... 2

2 Technical Data ..................................................................................... 3 2.1 Electrical Specifications .......................... ............. .......................... .......................... .......................... .......................... .................... ....... 3 2.1.1 Power Supply ........................................................................................................................ 3 2.1.2 Binary Output ........................................................................................................................ 3

2.2 Mechanical Specifications Specifications ................................... ...................... .......................... .......................... .......................... .................... ....... 3 2.3 Ambient Temperature Temperature and Humidity Range ......................... ............ .......................... ........................... ................ .. 4 2.4 Type Type Tests Tests ........................... .............. .......................... .......................... .......................... .......................... .......................... ........................... ................ .. 4 2.4.1 Environmental Tests...................... ...................... ..................... ...................... ...................... . 4 2.4.2 Mechanical Tests................................................................................................................... 4 2.4.3 Electrical Tests ...................................................................................................................... 4 2.4.4 Electromagnetic Compatibility ............................................................................................... 4

2.5 Certifications .......................... ............. .......................... ........................... .......................... .......................... ........................... ........................ ........... 5

3 Operation Theory ............................ .......................................... ........................... .......................... ......................... ............ 7 3.1 Overview Overview ........................... ............. ........................... .......................... .......................... .......................... .......................... .......................... .................. ..... 7

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Table Table of Contents

3.2 Control Circuit Module (Single Tripping Coil) .......... ........................... ............. ........................... ............. 8 3.2.1 Power Supply ........................................................................................................................ 9 3.2.2 Circuit Breaker Open State Supervision ..................... ...................... ...................... ............... 9 3.2.3 Closing Circuit ....................................................................................................................... 9 3.2.4 Trip Circuit ........................................................................................................................... 10 3.2.5 KKJ ..................................................................................................................................... 10 3.2.6 Anti-pump ............................................................................................................................ 11 3.2.7 Circuit Breaker Closed State Supervision ........................................................................... 12 3.2.8 Pressure Supervision .......................................................................................................... 12 3.2.9 Spare Contacts ................................................................................................................... 12

3.3 Seal-in Module .......................... ............. ........................... ........................... .......................... .......................... .......................... .................... ....... 12 3.4 Voltage Voltage Switchover Module with wi th Latch ................. .......................... ............. .......................... ................ ... 14 3.5 Voltage Switchover Module without Latch......................... ............ .......................... .......................... ................ ... 16 3.6 LOCKOUT-A Module ......................................................................................... 17 3.7 LOCKOUT-B Module ......................................................................................... 20 3.8 Repeat Relay Module .......................... ............. .......................... .......................... ........................... ........................... ...................... ......... 21 3.9 Control Circuit Module (Double Tripping Coils) ......................... ............ .......................... .................... ....... 22 3.9.1 Power Supply and Its Supervision ...................................................................................... 22 3.9.2 Circuit Breaker Open State Supervision ..................... ...................... ...................... ............. 26 3.9.3 Closing Circuit ..................................................................................................................... 26 3.9.4 Trip Circuit 1 ........................................................................................................................ 26 3.9.5 SHKKJ and STKKJ ............................................................................................................. 26 3.9.6 Anti-pump ............................................................................................................................ 27 3.9.7 Circuit Breaker Closed State Supervision circuit 1 ................... ...................... ..................... 27 3.9.8 Circuit Breaker Closed State Supervision circuit 2 ................... ...................... ..................... 27 3.9.9 Trip Circuit 2 ........................................................................................................................ 28 3.9.10 Pressure Supervision ........................................................................................................ 28 3.9.11 Spare Spare Contacts ..................... ...................... ..................... ...................... ...................... ...... 28

3.10 Voltage Voltage Parallel Module ......................... ............ .......................... .......................... .......................... .......................... .................. ..... 29

ii


Table Table of Content s

4 Hardware .......................... ....................................... .......................... ........................... ........................... ......................... ............ 31 4.1 Overview Overview ........................... ............. ........................... .......................... .......................... .......................... .......................... .......................... ................ ... 31 4.1.1 CJX-01 ................................................................................................................................ 31 4.1.2 CJX-02 ................................................................................................................................ 32 4.1.3 CJX-03 ................................................................................................................................ 32 4.1.4 CJX-04 ................................................................................................................................ 33 4.1.5 CJX-11 ................................................................................................................................ 33 4.1.6 CJX-21 ................................................................................................................................ 34

5 Installation and Commissioning.......................... ........................................ ........................... ............... 35 5.1 Introduction ....................................................................................................... 35 5.2 Safety Information............................................................................................. 35 5.3 Overview Overview ........................... ............. ........................... .......................... .......................... .......................... .......................... .......................... ................ ... 37 5.4 Unpacking and Checking the Protection Equipment .......................... ............ ......................... ........... 37 5.5 Installing the Protective Device ......................... ............ .......................... .......................... .......................... .................... ....... 38 5.5.1 Overview ............................................................................................................................. 38 5.5.2 Dimensions ......................................................................................................................... 38 5.5.3 Grounding Guidelines ......................................................................................................... 39 5.5.4 Cubicle Grounding .............................................................................................................. 40 5.5.5 Making Electrical Connections ............................................................................................ 40

5.6 Check the External External Circuit ................. .......................... .............. .......................... ........................... ...................... ......... 41 5.7 Insulation Test Test (if required) ......................... ............ .......................... .......................... .......................... ........................... .............. 41 5.8 Final Check ........................................................................................................ 42

6 Maintenance ......................... ...................................... .......................... ........................... ........................... ..................... ........ 43 6.1 Routine Check ................................................................................................... 43 6.2 Replace Failed Failed Modules .......................... ............. .......................... .......................... .......................... .......................... .................. ..... 43 6.3 Cleaning ......................... ............ ........................... ........................... .......................... .......................... .......................... .......................... .................. ..... 44 6.4 Storage......................... ............ .......................... ........................... .......................... .......................... ........................... .......................... .................... ....... 44

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Table Table of Contents

7 Decommissioning and Disposal.......................... ........................................ ........................... ............... 45 7.1 Decommissioning ............................................................................................. 45 7.2 Disposal Disposal ......................... ............ ........................... ........................... .......................... .......................... .......................... .......................... .................. ..... 45

8 Manual Version History ............................... ............................................. ........................... ....................... .......... 47

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1 Introduction

1 Introduction 1.1 Application CJX series interposing relay set are designed to provide various restart relay modules for protectors. The device is assembled by combined module, with 14 slots which are independent. It can be configured flexibly, and has been applied widely in actual projects. Current CJX series interposing relay set have been furnished with complete types of m odule which can be classified as follows by their functions: 1.

Control relays of three-phase circuit circuit breaker with one or two trip coil(s) coil(s)

2.

Seal-in relays

3.

Switchover relays of voltage with or without latch

4.

Lockout relays

5.

Contacts multiplication relays

6.

Paralleling relays of voltage

Since each module is independent respectively, the device has extreme scalability. The types of module can be extended in the future, which can meet various requirements in the field.

1.2 Function 1.

Manual closing, reclosing, phase-segregated tripping functions

2.

DC power supply monitoring

3.

Anti-pump function

4.

Open state supervision, closed state supervision

5.

Low pressure to block tripping, closing and AR

6.

AC voltage switchover

1.3 Features 1.

The types of modules are complete, with perfect functions and flexible configuration, which can meet various project requirements.

2.

The device uses imported imported completely-sealed, high-resistance and small power consumption relay, which greatly decreases the power consumption and heating, and improve humidity proof and other properties, thus increasing the safety of the device. 1


1 In In t r o d u c t i o n

3.

The device can provide many reserved relays, providing flexible applications.

1.4 Product Type CJX series interposing relay set are designed to provide various extension relay module for protective device, classified into six types by different module configuration: CJX-01, CJX-02, CJX-03, CJX-04, CJX-11 and CJX-21. Various module assemb led combined with relevant integral panel, can meet the requirements of most projects. Type Type

CJX-01 CJX-02 CJX-03 CJX-04 CJX-11

CJX-21

Application Scope

Applied to the areas requiring several breakers operation circuits with single tripping coil and voltage switching circuits Applied to the areas requiring LOCKOUT relay to operate breaker without operation circuit Applied to the areas requiring several tripping/closing current seal-in circuits and repeat relay circuits Applied to the areas requiring several voltage switch and voltage parallel circuits Applied to the areas requiring to operate two sets of three-phase interlock breakers with single tripping coil and realize double busbars voltage switching Applied to the areas requiring to operate a set of three-phase interlock breaker with double tripping coil and realize double busbars voltage switching

Note! To enhance or revise current function, the hardware of device may be updated, please confirm that this version of manual manu al is compatible with your products.

2


2 Technical Data

2 Technical Data 2.1 Electrical Specifications 2.1.1 Power Supply Rated Voltage

110Vdc, 110Vdc, 125Vdc, 220Vdc, 250Vdc

Variation

(80%~120%)Un

Ripple in the DC auxiliary voltage Burden

Max 15% of the DC value. Per IEC 60255-11:1979 Quiescent condition

< 40W

Operating condition

< 70W

2.1.2 Binary Output Contact Type

Tripping contact

Output mode

Potential free contact

Rated Voltage

250Vac/dc

Test voltage across open contact Continuous carry Short

Signal contact

250Vac/dc

> 1000Vac rms 8A

duration

current

(200ms)

5A

50A

Pickup time (Typ/Max)

5ms/10ms

10ms/15ms

Dropout time (Typ/Max)

4ms/10ms

8ms/10ms

Bounce time

< 1ms

< 1ms

0.4A resistance

0.2A resistance

0.2A

0.05A inductive (L/R=40ms)

Breaking capacity at 250Vdc

inductive (L/R=40ms)

2.2 Mechanical Specifications Enclosure

dimensions

(W×H×D) Trepanning

dimensions

(W×H)

482.6×177×291 (unit: mm)

450×179, M6 screw

Mounting Way

Flush mounted

Weight per device

Approx. 15kg

Housing material

Aluminum alloy

Housing color

Silver grey

Location of terminal

Rear panel of the device

Protection class: Per IEC60529:1989

3


2 Technical Data

Front side

IP40, Up to IP51(Flush mounted)

Other sides

IP30

Rear

side,

connection

terminals

IP20

2.3 Ambient Temperature and Humidity Range Standard

IEC 60255-6:1988

Operating temperature

-25°C~+60°C

Transport

and

storage

temperature range

-40°C~+70°C

Permissible humidity

5%~95%, condensation not permissible

Pollution degree

2

Altitude

<3000m

2.4 Type Tests 2.4.1 Environmental Tests Dry cold test

IEC 60068-2-1:1990 Test Ad for 16 h at -25°C

Dry heat test

IEC 60068-2-2:1974 Test Bd for 16 h at +55°C

Damp heat test, cyclic

IEC 60068-2-30:1980 Test Db Two (12+12) hour cycles 95%RH, low temperature +25°C, high temperature +55°C

2.4.2 Mechanical Tests Vibration

IEC60255-21-1:1988 Class I

Shock and bump

IEC 60255-21-2:1988 Class I

2.4.3 Electrical Tests Dielectric tests Impulse voltage tests Insulation resistance measurements Overvoltage category

IEC 60255-5:2000 Test voltage 2kV, 50Hz, 1min IEC

60255-5:2000

Test

voltage

5kV,

unipolar

impulses

waveform

1.2/50μs,source energy 0.5J IEC 60255-5:2000 Isolation resistance >100MΩ >100MΩ, 500Vdc Ⅲ

2.4.4 Electromagnetic Compatibility Per IEC 60255-22-1:1988 (idt IEC61000-4-12:1995) 1MHz burst disturbance test

Common mode: class III 2.5KV Differential mode: class III 1.0KV

Electrostatic discharge test

Per IEC60255-22-2:1996 (idt IEC 61000-4-2:2006) class IV For contact discharge: 8kV

4


2 Technical Data

For air discharge: 15kV Per IEC 60255-22-3:2000 (idt IEC 61000-4-3:1995) class III Frequency sweep Radiated amplitude-modulated 10V/m (rms), f=80…1000MHz Radio

frequency Spot frequency

interference tests

Radiated amplitude-modulated 10V/m (rms), f=80MHz/160MHz/450MHz/900MH f=80MHz/160MHz/450MHz/900MHz z Radiated pulse-modulated 10V/m (rms), f=900MHz Fast transient disturbance tests

Per IEC 60255-22-4:2002 (idt IEC 61000-4-4:2004) Power supply, I/O, Earth: Class IV, 4kV, 2.5 kHz, 5/50ns Communication terminals: Class IV, 2kV, 5 kHz, 5/50ns Per IEC 60255-22-5:2002 (idt IEC 61000-4-5:1995) class III

Surge immunity test Conducted

Power supply, AC input, I/O port: 2kV, line to earth; 1kV line to line, 1.2/50us RF

Per IEC 60255-22-6:2001

Electromagnetic Disturbance

Power supply, AC, I/O, Comm. Terminal: Class III, 10Vrms, 150 kHz~80MHz

Power Frequency Magnetic

Per IEC 61000-4-8:1993

Field Immunity

Class V: 100A/m for 1min, 1000A/m for 3s

Pulse

Magnetic

Field

Immunity Damped

Per IEC 61000-4-9:1993 Class V: V: 6.4/16μs, 1000A/m for 3s

oscillatory

magnetic field immunity

IEC 61000-4-10:1993 Class V: 100kHz & 1MHz –100A/m –100A/m

2.5 Certifications 1.

ISO9001: 2000

2.

ISO14001:2004

3.

OHSAS18001:1999

4.

ISO10012:2003

5.

CMMI L4

6.

EMC: 2004/108/EC, EN50263:1999

7.

Products safety(PS): 2006/95/EC, EN61010-1:2001

5


2 Technical Data

6


3 Operation Theory

3 Operation Theory 3.1 Overview CJX series devices are assembled by modules which are mutually independent. Twelve types of modules are provided, as listed in Table 3.1-1. 3.1-1. Table 3.1-1 Types of modules No.

Function

ID

A

Control relay of circuit breaker breaker with single tripping coil

SWI

B

Seal-in current relays

BO

C

Voltage switchover switchove r relays

RLY

D

Lockout relays (type A)

BO

E

Repeat relays

BO

F

Isolation and shield

G

Control relays of circuit breaker with double tripping coils (card A)

SWI

H

Control relays of circuit breaker with double tripping coils (card B)

SWI

I

Control relays of circuit breaker with double tripping coils (card C)

SWI

J

Voltage Voltage paralleling relays

BO

K

Voltage switchover switchove r

RLY

L

Lockout relays (type B)

BO

Z

Spare slot

CJX device has 14 slots in total. The types and quantity of modules can be configured flexibly. Based on summary of many years of experiences, we integrate six types of devices which are composed of various integral panels assembled by various modules, which can meet most current application requirements, in which: 1.

CJX-01

Can be equipped with four control circuit modules (A) and four voltage switchover modules (C or K) at most 2.

CJX-02

Can be equipped with eight LOCKOUT modules (D or L) at most 3.

CJX-03

Composed of seal-in current module (B) and repeat relay module (E), the numbers of modules are determined according to the requirements 4.

CJX-04

Can be equipped with ten voltage switchover modules (C or K) and three voltage paralleling modules (J) 7


3 Operation Operation Theory

5.

CJX-11

Composed of two control circuit modules (A) and two voltage switchover modules (c or K) 6.

CJX-21

Composed of a set of (three card-A, B, C) control circuit modules of double tripping coils with DC power switchover (G, (G, H, I) and two voltage switchover modules (C or K)

3.2 Control Circuit Module (Single Tripping Coil) The principle of control circuit module with single tripping coil is shown in Figure 3.2-1. 3.2-1. Pwr+

Pwr-

n1

n15

Power Supply

D24 R15 R13

L1 D5

n11

Open state supervision

To TWJ-

D6

S2'

Seal-in of closing

n3

Closing circuit with latch

52b

AutoReclosing

CC

R1 R1'

n12 D4

Auto-reclosing

S1'

D2

Anti pump

D3 Manual Closing Manual Trip

Manual closing

n2

R4

n4 D7

Tripping circuit with latch

Manual tripping

R3

S3'

D1

D8 Protection tripping

n20

Protect Trip

n5 D23 R16 R14

L2

R2 R2'

TC

Seal-in of tripping

52a

n13

To HWJ-

Closed state supervision

D16 Low pressure to block closing

Low pressure to block tripping Low pressure to block tripping and closing

n14

R11 R9

n16

R12 R10

Low pressure to block closing Low pressure to block tripping Low pressure to block tripping and closing

n18

Figure 3.2-1 Principle of control circuit module with single tripping coil

The rear terminals of control circuit module with single tripping coil are shown in the following table. Pin No.

Sign

Description

01

Pwr+

Positive pole of power supply

02

In_ManCls

Input of manual closing

03

CC

To closing coil

04

In_ManTrp

Input of manual tripping

05

TC

To tripping trippi ng coil

8


3 Operation Theory

08~06

KKJ-1

Binary output 1 of post closing position

08~07

TWJ2-1

Binary output 1 of open position relay 2

08

Common_1

Common terminal 1

09

TWJ2-2


10

KKJ-2


11

TWJ-

Negative pole of power supply for open position relay

12

In_AR

Input of automatic reclosure

13

HWJ-

Negative pole of power supply for closed position relay

14

In_LowPres_Cls

Input of low pressure to block closing circuit breaker

15

Pwr-

Negative pole of power supply

16

In_LowPres_Trp In_LowPres_Trp

Input of low pressure to block tripping circuit breaker

21~17

TWJ3-1


18

In_LowPres_Trp&Cls In_LowPres_Trp&Cls

Input of low pressure to block tripping and closing circuit breaker

21~19

HWJ2

Binary output of closed position relay 2

20

In_ProtTrp

Input of protection tripping

21

Common_2

Common terminal 2

25~22

HYJ2

Binary output of low pressure to block closing circuit breaker

25~23

BO_TCCS

Binary output of control circuit failure

25~24

TYJ2

Binary output of low pressure to block tripping circuit breaker

25

Common_3

Common terminal 3

26~30

TWJ1

Binary output of open position relay 1

27~29

TWJ3-2


28~30

HWJ1

Binary output of closed position relay 1

30

Common_4

Common terminal 4

3.2.1 Power Supply Auxiliary power for control relays of circuit breaker is supplied via terminal n1 and n15.

3.2.2 Circuit Breaker Open State Supervision The auxiliary relays TWJ1, TWJ2 and TWJ3 are applied to supervise the open state of Circuit breaker when terminal n11 is connected to the negative pole of power supply in series with normal closed auxiliary contact of circuit breaker (52b). In addition, if terminal n11 n11 is connected with n normal ormal closed auxiliary contact of circuit breaker (52b) and its close coil (CC), TWJ1, TWJ2 and TWJ3 can provide supervision on close coil as well. Indicator L1 in green shows the open state of circuit breaker, and it can be seen on the faceplate with designation “52b” 52b”.

3.2.3 Closing Circuit Auto reclosing signal comes from terminal n12, while manual closing signal comes from n2. Terminal n3 shall be connected to close coil (CC) in series with normal closed auxiliary contact of circuit breaker (52b). 9



HBJ is a seal-in auxiliary relay, which pickup current is adaptive to the closing current in the range of 0.5A-4A. If the closing current is greater than 4A, an additional resistor-R1’ resistor-R1’ can be added. As shown in Figure 3.2-1, 3.2-1, after the protection device sends closing command, the circuit is conducted through the normally closed contact of antianti-pump HBJ”, pump relay “TBJV “TBJV””, the seal-in relay “HBJ” the normally closed auxiliary contact of circuit breaker “52b” 52b” and closing coil “CC” CC”. The seal-in relay “HBJ” HBJ” will operate, and its normally open contact “HBJ” HBJ” will be closed. The closing circuit with latch will be conducted through the normally open contact “HBJ” HBJ”, the normally closed contact of anti-pump anti-pump relay “TBJV “TBJV””, the seal-in relay “HBJ” HBJ”, the normally closed auxiliary contact of circuit breaker “52b” 52b” and closing coil “CC” CC” until the normally closed auxiliary contact of circuit breaker “52b” 52b” is open. This circuit ensures that circuit breaker is still closed reliably even if the closing command from the protection device has dropped off. TBJV is the anti-pump relay; please refer to section 3.2.6 section 3.2.6 for for details. This function can be released by shortening S2 to bypass the normal closed contacts of TBJV. Low pressure blocking function for manual closing is achieved by normal closed contact of HYJ1 and HYJ2; please refer to section 3.2.8 section 3.2.8 for for details. This function can be released by shortening S1, to bypass the normal closed contact of HYJ1 and HYJ2.

3.2.4 Trip Circuit Protection trip signal comes from terminal n20, while manual trip signal comes from n4. Terminal n5 shall be connected to trip coil (TC) in series with normal open auxiliary contact of circuit breaker (52a). TBJ is a seal-in auxiliary relay, which pickup current is adaptive to the trip current in the range of 0.5A-4A. If the trip current is greater than 4A, an additional resistor-R2’ resistor-R2’ can be added. TBJ is also used in anti-pump circuit, please refer to section 3.2.6 section 3.2.6 . As shown in Figure 3.2-1, 3.2-1, after the protection device sends tripping command, the circuit is conducted through the normally closed contact of tripping pressure relay “TYJ1 “TYJ1”” and “TYJ2” TYJ2”, the seal-in relay “TBJ” TBJ”, the normally open auxiliary contact of circuit breaker “52a” 52a” and tripping coil “TC” TC”. The seal-in relay “TBJ” TBJ” will operate, and its normally open contact “TBJ” TBJ” will be closed. The tripping circuit with latch will be conducted through the normally open contact “TBJ” TBJ”, the normally closed contact of tripping pressure relay “TYJ1 “TYJ1”” and “TYJ2” TYJ2”, the seal-in relay “TBJ” TBJ”, the normally open auxiliary contact of circuit breaker “52a” 52a” and tripping coil “TC” TC” until the normally open auxiliary contact of circuit breaker “52a” 52a” is open. This circuit ensures that circuit breaker is still open reliably even if the tripping command from the protection device has dropped off. Low pressure blocking function for trip is achieved by normal closed contact of TYJ1 and TYJ2; please refer to section 3.2.8 section 3.2.8 for for details. This function can be released by shortening S3 to bypass the normal closed contact of TYJ1 and TYJ2.

3.2.5 KKJ KKJ is an bi-stable auxiliary relay. When circuit breaker is closed manually, the relay KKJ will pick up and latch, when circuit breaker is tripped manually, the relay KKJ will reset. The normal open contact of KKJ can be used together with normal closed auxiliary contact of circuit breaker (52b), 10


3 Operation Theory

to initiate auto-reclosure in case that circuit breaker trips especially without any trip commands from protection and manual switch.

3.2.6 Anti-pump Anti-pump function is achieved via auxiliary relay TBJV. TBJV. In the event that a breaker is closed into a fault, while the operator is applying a close signal via a closed control switch, the circuit breaker will trip and prevent closing again until the closing circuit has been de-energized by the operator's releasing the control switch. When trip signal comes and at the same time close signal persists, the contact of TBJ will close and TBJV will operate and keep sealed with its’ its’ own normal open contact. The normal closed contact of TBJV will cut off closing circuit to prevent any further closing. If there is anti-pump circuit in circuit breaker itself, the anti-pump function of this relay set can be released by shortening S2 to bypass the normal closed contact of TBJV.

11



3.2.7 Circuit Breaker Closed State Supervision The auxiliary relays HWJ1, HWJ2 are applied to supervise the closed state of Circuit breaker when terminal n13 is connected to the negative pole of power supply in series with normal open auxiliary contact of circuit breaker (52a). In addition, if terminal n13 is connected to normal open auxiliary contact of circuit breaker (52a) and its trip coil (TC), HWJ1, HWJ2 can provide supervision on trip coil as well. Indicator L2 in red shows the closed state of circuit breaker, and it can be seen on the faceplate with designation “52a” 52a”.

3.2.8 Pressure Supervision Three levels of pressure are provided: Low pressure to inhibit closing from terminal n14, low pressure to inhibit trip from terminal n16, and low pressure to inhibit switching (both closing and trip) from n18. The normal closed contacts of HYJ1 and HYJ2 are put in closing circuit, while the normal closed contacts of TYJ1 and TYJ2 are put in trip circuit.

3.2.9 Spare Contacts The device provides some reserved auxiliary contacts also, used to cooperate with other protectors to realize other functions, which is shown in Figure in Figure 3.2-2. n10

n9

n25

n24 n22

n8

n7 n21

n27

n17 n19

n23 n29

n6

n30

n26 n28

Figure 3.2-2 Output contacts of control circuit with single tripping coil

3.3 Seal-in Module Principle and contact output for current retain module are shown in Figure 3.3-1. 3.3-1.

12


3 Operation Theory D7 D8

D13 D13

D14 D14

n4

n1 D1 n8

D4 n7

n14

n13

J1

J4 R1 R2

R11 R12

D9 D10 D10

D15 D15

D16 D16

n5

n2 D2 n10

D5 n9

n16

n15

J2

J5 R3 R4

R9 R10

D11 D12

D17 D17

D3 n12

D6 n11

n18

n17

J3

J6 R5 R6

R7 R8

J1

J4 n19

n20

n26

n25

J2

J5 n21

n22

n28

n27

J3 n24

D18 D18

n6

n3

J6 n23

n29

n30

Figure 3.3-1 Principle and contact output for seal-in module

The rear terminals of seal-in module are shown in the following table. Pin No.

Sign

Description

01

In_SIG1

Input terminal of signal for J1 relay

02

In_SIG2


03

In_SIG3


04

In_SIG4


05

In_SIG5


06

In_SIG6


07

Out_SIG1

Output terminal of signal for J1 relay

08

Pwr+_1

The positive polarity of power supply for J1 relay

09

Out_SIG2


10

Pwr+_2


11

Out_SIG3


12

Pwr+_3


13

Out_SIG4


14

Pwr+_4


15

Out_SIG5


16

Pwr+_5


17

Out_SIG6


18

Pwr+_6


19~20

J1

The normally open contact of J1 relay

21~22

J2


23~24

J3


25~26

J4


27~28

J5


29~30

J6


13



Current seal-in module provides six identical DC seal-in relays. Select corresponding parallel resistance (R2, R4, R6, R8, R10 and R12, cannot be used when DC seal-in current is less or equal to 4A) for each DC seal-in relay according to DC seal-in current in the field. Terminals n8, n10, n12, n14, n16, n18 are connected to positive pole of power supply, combined with output contacts provided by relevant relay can realize seal-in function. Terminals n7, n9, n11, n13, n15 and n17 are connected to negative pole of power supply through tripping coil or closing coil. n1, n2, n3, n4, n5 and n6 are connected to tripping contacts of protective device.

3.4 Voltage Voltage Switchover Module with Latch The principle and contact output of voltage switchover module with latch are shown in Figure 3.4-1. 3.4-1. AuxNOonBB1 NConBB1

NConBB2 NOonBB2 Aux+

Figure 3.4-1 Principle and contact output of voltage switchover module with latch

Where: NO on BB1: Normally open contact of disconnector on busbar 1 NC on BB1: Normally closed contact of disconnector on busbar 1 NO on BB2: Normally open contact of disconnector on busbar 2 NC on BB2: Normally closed contact of disconnector on busbar 2 The rear terminals of voltage switchover module with latch are shown in the following table.

14


3 Operation Theory Pin No.

Sign

Description

01

In_NO_DSBB1

Input of auxiliary normally open contact of disconnector switch on busbar 1

02

In_NC_DSBB1

Input of auxiliary normally closed contact of disconnector switch on busbar 1

03

In_NO_DSBB2


04

In_NC_DSBB2

Input of auxiliary normally closed contact of disconnector switch on busbar 2

05

1U_1-1

Phase voltage input of busbar 1 of 1st group

06

1U_2-1


07

1U1

Phase voltage output after switching

08

1U_1-2


09

1U_2-2


10

1U2


11

1U_1-3


12

1U_2-3


13

1U3


14

1U_1-4

Start connection input of busbar 1 of 1st group

15

1U_2-4


16

1U4

Start connection input of after switching

17

2U_1-1

Phase voltage input of busbar 1 of 2nd group

18

2U_2-1


19

2U1


20

2U_1-2


21

2U_2-2


22

2U2


23

2U_1-3


24

2U_2-3


25

2U3


26~28

BO_LossVolt

27~28

BO_OpSimul

28

Common

Common terminal

29

Pwr+

Positive pole of power supply for the module

30

Pwr-

Negative pole of power supply for the module

It is closed when two busbar lose voltage (i.e. neither of switching relays of two busbars operates.) It is closed when switching relays of bus1 and switching relays of bus 2 operate at same time.

This module is used to switch voltage between two buses VT, for double busbars arrangement, voltage can be automatically switched between two buses based on the state of isolator, the device can be connected with the voltage of busbar Ⅰ or busbar Ⅱ. The state of isolator can be reflected through normally closed and normally open auxiliary contacts of isolator of the line. Isolator can provide a normally open and a normally closed auxiliary contact, its principle and

15



output contacts are shown in Figure 3.4-1. 3.4-1. If field isolator can only provide a couple of normally open auxiliary contacts, after parallel connecting n1 and n4, connect to normally open contact of busbar Ⅰ, after n2 and n3 are parallel connected, they are connected to the normally open contact of busbar Ⅱ. N29 and n30 will be connected to the positive and negative poles of power supply respectively. Signal indicator LED L1 (green) and L2 (green) indicate this feeder is either connected to busbar Ⅰ or

busbar Ⅱ respectively.

3.5 Voltage Voltage Switchover Module without Latch The principle and output contact of voltage switchover module without latch are shown in Figure 3.5-1. 3.5-1. AUX-

NOonBB1

NOonBB2

AUX+

Figure 3.5-1 Principle and output contact of voltage switchover module without latch

The rear terminals of voltage switchover module without latch are shown in the following table. Pin No.

Sign

Description

01

In_NO_DSBB1


02

Blank

03

In_NO_DSBB2

04

Blank

05

1U_1-1


06

1U_2-1


07

1U1


08

1U_1-2


09

1U_2-2



16


3 Operation Theory

10

1U2


11

1U_1-3


12

1U_2-3


13

1U3


14

1U_1-4


15

1U_2-4


16

1U4

Start connection input of after switching

17

2U_1-1


18

2U_2-1


19

2U1


20

2U_1-2


21

2U_2-2


22

2U2


23

2U_1-3


24

2U_2-3


25

2U3


26~28

BO_LossVolt

27~28

BO_OpSimul

28

Common

Common terminal

29

Pwr+

Positive pole of power supply for the module

30

Pwr-

Negative pole of power supply for the module

It is closed when two busbar lose voltage (i.e. neither of switching relays of two busbars operates.) It is closed when switching relays of bus1 and switching relays of bus 2 operate at same time.

The functions of voltage switchover module without latch are the same as that of voltage switchover module with latch. The difference lies in that all relays cannot be latched. It will acts when normally open contact of isolator is closed, and return when it is open. When the signal of normally open auxiliary contact of isolator is lost, the device will output alarming signal through n28 and n26. Signal indicator LED L1 (green) and L2 (green) indicate that this feeder is either connected to busbar Ⅰ or busbar Ⅱ respectively.

3.6 LOCKOUT-A Module LOCKOUT-A LOCKOUT-A module is composed of three th ree LOCKOUT circuits, the relays are all magnetic latching relays. To meet different applications, five options are provided at present, they are distinct in terms of principle and configuration of output contacts. Type 1: shown in Figure 3.6-1, 3.6-1, composed of three sets of LOCKOUT circuits, each set will output three pairs of normally open contacts. 17


3 Operation Operation Theory Pwr-

n3

D1

D2

J1

J2

D3

D4

Trigger 1 Reset 1

n4

D5

n1 R1R2

R3R4

n8 n10

D6

J1

n7

J1

n9

J2

Trigger 2 Reset 2

n5

n6

J3

J4

D7

D8

D9

n11

n12

R5 R6

R7 R8

n14 n16

D10

J3

n13

J3

n15

J4 n25

J5

J6

D11

D12

Trigger 3 Reset 3

n26

n2

Pwr+

R13 R14

J2

n17

n18

R9 R10

R11R12

n20 n22

L1

J5

n19

J5

n21

J6

J4

n23

n24

J6

Figure 3.6-1 Principle and output contact of LOCKOUT-A module (type 1)

Type 2: shown in Figure 3.6-2 , composed of three LOCKOUT circuit, each set will output two couple of normally open contacts and a set of normally closed contact. Pwr-

n3

D1

D2

J1

J2

D3

D4

n1 R1 R2

Trigger 1 Reset 1

n4

D5

R3 R4

n8 n10

D6

J1

n7

J1

n9

J2 n5

J3

J4

D7

D8

R5 R6

n11

n12

Trigger 2 Reset 2

n6

D9

R7 R8

n14 n16

D10

J3

n13

J3

n15

J4 n25

J5

J6

D11

D12

R9 R10

n17

n18

Trigger 3 Reset 3

n26

n2

Pwr+

J2

R13 R14

R11 R12

L1

n20 n22

J5

n19

J5

n21

J6 n23

n24

J4 J6


Type 3: shown in Figure 3.6-3, 3.6-3, three LOCKOUT circuits are parallel connected to form a set of LOCKOUT circuits, outputting nine pairs of normally open contacts in total.

18


3 Operation Theory Pwr-

n3

D1

D2

J1

J2

D3

D4

D5

D6

J3

J4

D7

D8

Trigger Reset

n4

D9

n2

Pwr+

R1 R2

R3 R4

n8 n10 n12

R5 R6

R7 R8

n14 n16

D10

J5

J6

D11

D12 R13 R14

J2

n1

n18

R9 R10

R11R12

n20 n22

L1

J4

n24

J1

n7

J1

n9

J2

n11

J3

n13

J3

n15

J4

n17

J5

n19

J5

n21

J6

n23

J6


Type Type 4: shown in Figure 3.6-4, 3.6-4, it is composed of three sets of LOCKOUT circuits, outputs five pairs of normally open contacts and four pairs of normally closed contacts in total. Pwr-

n3

D1

D2

J1

J2

D3

D4

n1 R1 R2

Trigger 1 Reset 1

n4

D5

R3 R4

n8 n10

D6

J1 J1

n7 n9

J2 n5

J3

J4

D7

D8

R5 R6

n11

n12

Trigger 2 Reset 2

n6

n25

D9

D10

J5

J6

D11

D12

R7 R8

n14 n16

J3

n13

J3 n15 J4

R9 R10

n18

n17

Trigger 3 Reset 3

n26

n2

Pwr+

J2

R13 R14

R11 R12

L1

J5 n20 n22

n19 J5

n21

J6

J4

n24

n23

J6


Type 5: shown in Figure 3.6-5 , three sets of LOCKOUT circuits are in parallel to form a set of LOCKOUT circuit, outputting nine pairs of normally open contacts, which each pair of connecting contacts are formed by parallel connecting the contacts of two different relays.

19



D1

D2

D3

D4

J1

J2

J3

J4

n3

Trigger Reset

J1

n8

Pwrn1 R1 R2

n7

J2 J1

n10

n9

J2 n4

D5

D6

D7

D9

D10

D11

D12

J5

J6

J7

J8

D13

D14

R3 R4

D8

D15

J3

n12

n11

J4

R5 R6

n13

J6

R7 R8

D16

J5

n14

J5

n16

n15

J6 D17

D18

D19

D20

J9

J10

J11

J12

D21

D22

D23

D24

J7

n18

n2

J9

n20

n19

J10 L1

R13 R14

J4

Pwr+

R11 R12

n17

J8

R9 R10

J9

n21

n22 J10

J8 J12

J11

n24

n23

J12


Terminals n3, n5 and n25 are input terminals for action signal, terminals n4, n6 and n26 are input terminals for reseting signal. n2 and n1 terminals are connected with the positive and negative poles of operation power supply respectively. Signal indicator LED L1 is normally light (red) shows LOCKOUT circuit acts.

3.7 LOCKOUT-B Module LOCKOUT-B module only provides a set of LOCKOUT circuits. Its principle and output contacts are shown in Figure 3.7-1. 3.7-1. The J1~J4 in the Figure 3.7-1 are magnetic latching relays, J5 is not magnetic latching relay. relay. n3 terminal is action signal input terminal, n4 terminal is input terminal of resetting signal. n2 and n1 terminals are connected to the positive and negative poles of operation power supply respectively. respectively. Indicator L1 is n ormally lit (red), indicating the action of LOCKOUT circuit. PwrD9

D1

Tigger Reset

J2

J1

n3

n1 J4

J3

J5

n4 D2

n2

L1

J4

Pwr+

J1 n8 n12

J2 J3

n16 n20

J4 J5

n22

n7 n11 n15

n10 n14

J1 J2 J3

n18

n9 n13 n17

n19 n21

J5 n24

n23

Figure 3.7-1 Principle and output contact of LOCKOUT-B module

20


3 Operation Theory

3.8 Repeat Relay Module Repeat relay module has four independent circuits, each provides three output contacts, some of which can be configured as normally open or normally closed contacts. The principle and output contacts are shown in Figure 3.8-1. 3.8-1. n4, n6, n8 and n10 are action signal input terminal, n2 is connected to negative pole of operation power supply su pply..

Figure 3.8-1 Principle and output contact of repeat relay module

The rear terminals of repeat relay module are shown in the following table. Pin No.

Sign

Description

01~03

BO_Trp_6-1

Binary output 1 of tripping relay 6 (normally open contact)

02

Pwr-

Negative pole of power supply for 4 signal inputs

04

In_SIG1

Input of 1st signal

05~07

BO_Trp_6-2


06

In_SIG2

Input of 2nd signal

08

In_SIG3

Input of 3rd signal

09

Blank

Not used

10

In_SIG4

Input of 4th signal

11~12 11~12

BO_Trp_3-1


13~14

BO_Trp_3-2


15~16

BO_Trp_4

Binary output of tripping relay 4 (normally open contact)

17~18

BO_Trp_1-1


19~20

BO_Trp_1-2


21~22

BO_Trp_2


21



23~24

BO_Trp_8


25~26

BO_Trp_7-1


27~28

BO_Trp_7-2


29~30

BO_Trp_5


3.9 Control Circuit Module (Double Tripping Coils) This module consists of three cards-A, B and C, and provides control circuit for a three-phase circuit breaker with two trip coils.

3.9.1 Power Supply and Its Supervision Two Two auxiliary power supplies are used. Auxiliary power 1 is supplied via terminal nA1 and nA29 to the circuits of o f open state supervision, manual trip, manual closing, auto-reclosing, protection trip 1, closed state supervision 1, and anti-pump circuit. Auxiliary power 2 is supplied via terminal nA3 and nC10 to the circuits of closed state supervision 2 and protection trip 2. These two power supplies are supervised by relays 1JJ, 2JJ, 3JJ and 4JJ. 4 JJ.

22


3 Operation Theory AUX1+

AUX1PowerSupply1 Openstate supervision Seal-inofclosing

Auto-Reclosing

Auto-reclosing

Anti-pump

Manualclosing

ManualClosing ManualTrip

Manual tripping Protection tripping

ProtectionTrip1

Seal-inoftrip

T r p i C o l i 1

Closedstate supervision AUX2-

AUX2+

Power supply2 Closedstate supervision Manualtrip Protection trip

ProtectionTrip2

T r p i C o i l 2

Seal-inoftrip

PS+

Power supplyafter switching

PS-

P S o w w i t e c r h s o u v p e p r l y

PS2 PS1 PS1

PS2

Lowpressureto blockAR

P s o u w p e e r s v r u s i o p n p y l

Lowpressureto blockAR

Lowpressureto blockclosing

Lowpressureto blockclosing

Lowpressureto blockingtripping

Lowpressureto blocktripping

Lowpressureto blocktrippingand closing

Lowpressureto blocktrippingand closing

Figure 3.9-1 Principle of control circuit module w ith double tripping coils

The rear terminals of control circuit module with double tripping coils (card A) are shown in the following table. Pin No.

Sign

Description

01

Pwr+_1

Positive pole of power supply for 1st tripping coil

02~04

SHKKJ-1


03

Pwr+_2

Positive pole of power supply for 2nd tripping coil

05

In_ManCls

Input of manual closing

14~06

STKKJ-1

Binary output 1 of post tripping position

07

In_ManTrp

Input of manual tripping

23



14~08

STJ

Binary output of manual tripping

09

In_AR

Input of automatic reclosure

14~10

TYJ2

Binary output 2 of low pressure to block tripping circuit breaker

11

CC

To closing coil

14~12

HYJ2

Binary output 2 of low pressure to block closing circuit breaker

13

In_ProtTrp_1

Input 1 of protection tripping

14

Common_1

Common terminal 1

15

TC_1

To tripping trippi ng coil 1

16

Blank

Not used

17

In_ProtTrp_2

Input 2 of protection tripping

18

In_LowPres_Trp In_LowPres_Trp

Input of low pressure to block tripping circuit breaker

19

TC_2

To tripping trippi ng coil 1

20

In_LowPres_Trp&Cls In_LowPres_Trp&Cls

Input of low pressure to block tripping and closing circuit breaker

21

Pres_Pwr-

Negative pole of power supply for pressure blocking circuit

22

In_LowPres_Cls

Input of low pressure to block closing circuit breaker

23

Common_2

Common terminal 2

23~24

HYJ1

Binary output 1 of low pressure to block closing circuit breaker

23~25

SHKKJ-2


23~26

TYJ1

Binary output 1 of low pressure to block tripping circuit breaker

23~27

STKKJ-2

Binary output 2 of post tripping position

28

Blank

Not used

29

Pwr-_1

Negative pole of power supply for 1st tripping coil

30

Blank

Not used

The rear terminals of control circuit module with double tripping coils (card B) are shown in the following table. Pin No.

Sign

Description

01

Pwr+_2


02

Pwr+_1


03

Common_1

Common terminal 1

04

Common_2

Common terminal 2

05

Common_3

Common terminal 3

06~23

TWJ1-1


07~24

HWJ1-1

Binary output 1 of closed position relay 1

08~25

HWJ4-1


09~26

TWJ2-1


10~27

HWJ2-1


11~28 11~28

HWJ5-1


12

Blank

Not used

13

52a_Pwr-_2

Negative pole of power supply for closed position relay of 2nd tripping coil

03~14

TWJ1-2


03~15

HWJ1-2


03~16

HWJ4-2


24


3 Operation Theory

04~17

TWJ2-2


04~18

HWJ5-2


19

Blank

Not used

20

Blank

Not used

05~21

BO_TCCS_1

Binary output of control circuit failure of 1st tripping coil

05~22

BO_TCCS_2

Binary output of control circuit failure of 2nd tripping coil

29

52a_Pwr-_1

Negative pole of power supply for closed position relay of 1st tripping coil

30

TWJ-

Negative pole of power supply for open position relay

The rear terminals of control circuit module with double tripping coils (card C) are shown in the following table. Pin No.

Sign

Description

01

AR_Pres_Pwr+

Positive pole of power supply for low pressure blocking AR

02

Pwr+_1


03

AR_Pres_Pwr -

Negative pole of power supply for low pressure blocking AR

04

Pwr+_2


05~07

CHYJ1-1

06

Pwr+_3

Positive pole of power supply for 3rd tripping coil

08

Pwr-_1

Negative pole of power supply for 1st tripping coil

09~11

CHYJ2-1

10

Pwr-_2

Negative pole of power supply for 2nd tripping coil

12

Pwr-_3

Negative pole of power supply for 3rd tripping coil

13~15

CHYJ1-2

14~16

3JJ-1

17~19

CHYJ2-2

18~20

4JJ-1

21

Blank

22~24

3JJ-2

Binary output 2 of power supply switch 3 (normally open contact)

23

Blank

Not used

25

Blank

Not used

26~28

4JJ-2

Binary output 2 of power supply switch 4 (normally open contact)

27

Blank

Not used

29

Blank

Not used

30

Blank

Not used

Binary output 1 of the relay 1 of low pressure to block AR (normally closed contact)

Binary output 1 of the relay 2 of low pressure to block block AR (normally (normally closed closed contact)

Binary output 2 of the relay 1 of low pressure to block block AR (normally (normally open contact) Binary output 1 of power supply switch 3 (normally closed contact) Binary output 2 of the relay 2 of low pressure to block block AR (normally (normally open contact) Binary output 1 of power supply switch 4 (normally closed contact)

The low-pressure supervision circuit is commonly used by the two control circuits, so it is powered by either of the power supplies via switchover circuit. If auxiliary power 1 is normal, and then it will be used for low-pressure supervision, while if it fails, auxiliary power 2 will take the place. The switchover is achieved via contacts of 1JJ and 2JJ.

25



3.9.2 Circuit Breaker Open State Supervision The auxiliary relays TWJ1, TWJ2 and TWJ3 are applied to supervise the open state of Circuit breaker when terminal nB30 is connected to the negative pole of power supply in series with normal closed auxiliary contact of circuit breaker (52b). In addition, if terminal nB30 is connected with normal closed auxiliary contact of circuit breaker (52b) and its close coil (CC), as dashed line between nB30 and nA11 shows in Figure 3.9-1, 3.9-1, TWJ1, TWJ2 and TWJ3 can provide supervision on c lose coil (CC) as well. Indicator L1 in green shows the open state of circuit breaker, and it can be seen on the faceplate with designation “52b” 52b”.

3.9.3 Closing Circuit Auto reclosing signal comes from terminal nA9, while manual closing signal comes from nA5. Terminal nA11 shall be connected to close coil (CC) in series with normal closed auxiliary contact of circuit breaker (52b). HBJ is a seal-in auxiliary relay, which pickup current is adaptive to the closing current in the range of 0.5A-4A. If the closing current is greater than 4A, an additional resistor-R1’ resistor-R1 ’ can be added. (See section 3.2.3 section 3.2.3 about closing circuit with latching) TBJV is the anti-pump relay; please refer to secion 3.9.6 for details. This function can be released secion 3.9.6 for by shortening S2 to bypass the normal closed contacts of TBJV. Low pressure blocking function for manual closing is achieved by normal closed contact of HYJ1 and HYJ2; please refer to section 3.9.10 section 3.9.10 for for details. This function can be released by shortening S1 to bypass the normal closed contact of HYJ1 and HYJ2.

3.9.4 Trip Circuit 1 Protection trip signal comes from terminal nA13, while manual trip signal comes from nA7. The relay STJ in manual trip circuit provides multiplicated contacts for trip circuit 2, please refer to section 3.9.9 section 3.9.9.. Terminal nA15 shall be connected to trip coil (TC1) in series with normal open auxiliary contact of circuit breaker (52a). TBJ1 is a seal-in auxiliary relay, which pickup current is adaptive to the trip current in the range of 0.5A-4A. If the trip current is greater than 4A, an ad ditional resistor-R0’ resistor-R0’ can be added. TBJ1 is also used in anti-pump circuit, please refer to section 3.9.6 . (See section 3.2.4 about tripping circuit with latching) Low pressure blocking function for trip is achieved by normal closed contact of TYJ1; please refer to section 3.9.10 section 3.9.10 for for details. This function can be released by shortening S4 to bypass the normal closed contact of TYJ1.

3.9.5 SHKKJ and STKKJ SHKKJ and STKKJ are bistable auxiliary relays. When circuit breaker is closed manually, the relay

26


3 Operation Theory

SHKKJ will pick up and latch and STKKY will reset. When circuit breaker is tripped manually, the relay SHKKJ will reset and STKKJ will operate and latch. The normal open contact of SHKKJ can be used together with normal closed auxiliary contact of circuit breaker (52b), to initiate auto-reclosure in case that circuit breaker trips especially without any trip commands from protection and manual switch.

3.9.6 Anti-pump Anti-pump function is achieved via auxiliary relay TBJV. TBJV. In the event that a breaker is closed into a fault, while the operator is applying a close signal via a closed control switch, the circuit breaker will trip and prevent closing again until the closing circuit has been de-energized by the operator's releasing the control switch. When trip signal comes and at the same time close signal persists, the contact of TBJ1 and/or TBJ2 will close and TBJV will operate and keep sealed with its’ its ’ own normal open contact. The normal closed contacts of TBJV will cut off closing circuit to prevent any further closing. If there is anti-pump circuit in circuit breaker itself, the anti-pump function of this relay set can be released by shortening S2 to bypass the normal closed contacts of TBJV.

3.9.7 Circuit Breaker Closed State Supervision circuit 1 This supervision circuit is associated with the trip coil 1. The auxiliary relays HWJ1, HWJ2 and HWJ3 are applied to supervise the closed state of circuit breaker when terminal nB29 is connected to the negative pole of power supply in series with normal open auxiliary contact of circuit breaker (52a). In addition, if terminal nB29 is connected to normal open auxiliary contact of circuit breaker (52a) and its trip coil (TC1), as dashed line between nB29 and nA15 shows in the Figure 3.9-1, 3.9-1, HWJ1, HWJ2 and HWJ3 can provide supervision on trip coil as well. Indicator L2 in red shows the closed state of circuit breaker, and it can be seen on the faceplate with designation “52a-1” 52a-1”.

3.9.8 Circuit Breaker Closed State Supervision circuit 2 This supervision circuit is associated with the trip coil 2. The auxiliary relays HWJ4, HWJ5 and HWJ6 are applied to supervise the closed state of circuit breaker when terminal nB13 is connected to the negative pole of power supply in series with normal open auxiliary contact of circuit breaker (52a). In addition, if terminal nB13 is connected to normal open auxiliary contact of circuit breaker (52a) and its trip coil (TC2), as dashed line between nB13 and nA19 shows in the Figure 3.9-1, 3.9-1, HWJ4, HWJ5 and HWJ6 can provide supervision on trip coil as well. Indicator L3 in red shows the closed state of circuit breaker, and it can be seen on the faceplate with designation “52a-2” 52a-2”.

27



3.9.9 Trip Circuit 2 Protection trip signal comes from terminal nA17, while manual trip signal comes from multiplicated contact of STJ, please refer to section 3.9.4 section 3.9.4.. Terminal nA19 shall be connected to trip coil (TC2) in series with normal open auxiliary contact of circuit breaker (52a). TBJ2 is a seal-in auxiliary relay, which pickup current is adaptive to the trip current in the range of 0.5A-4A. If the trip current is greater than 4A, an additional resistor-R2’ resistor-R2’ can be added. TBJ2 is also used in anti-pump circuit, please refer to section 3.9.6 . (See section 3.2.4 about tripping circuit with latching) Low pressure blocking function for trip is achieved by normal closed contact of TYJ2; please refer to section 3.9.10 section 3.9.10 for for details. This function can be released by shortening S3 to bypass the normal closed contact of TYJ2.

3.9.10 Pressure Supervision Four levels of pressure are provided: Low pressure to inhibit auto-closing from terminal nC1, Low pressure to inhibit closing from terminal nA22, low pressure to inhibit trip from terminal nA18, and low pressure to inhibit switching (both closing and trip) from nA20. The normal closed contacts of CHYJ1 and CHHYJ2 are provided to inhibit auto-reclosing, the normal closed contacts of HYJ1 and HYJ2 are put in manual man ual closing circuit, while the normal closed contacts of TYJ1 a nd TYJ2 are put in trip circuit.

3.9.11 Spare Contacts Some spare contacts are provided for further applications, as shown in Figure 3.9-2 .

nA2 nA14

SHKKJ STKKJ STJ TYJ2 HYJ2

nA23

SHKKJ STKKJ HYJ1 TYJ1

nC14 nC22 nC18 nC26 nC5 nC13

3JJ 3JJ 4JJ 4JJ CHYJ1 CHYJ1

nA4

nB6

nA6

nB5

nA8 nA10 nA12

nB9 nB3

nA25 nB4

nA26 nC16

TWJ2

nB7

nC24

nB8

nC20

nB10

nC28

nB11

nC7

nC9

nC15

nC17

HWJ4 HWJ2 HWJ5 CHYJ2 CHYJ2

nB21 nB22 nB14 nB15 nB16

TWJ2 HWJ2 HWJ5 HWJ2 HWJ5 HWJ1

nB23

nB26

TWJ1 HWJ1 HWJ4

nA27 nA24

TWJ1 TWJ3 HWJ3 HWJ6

nB17 nB18 nB24 nB25 nB27 nB28 nC11 nC19

Figure 3.9-2 Output contacts of control circuit with double tripping coils

28


3 Operation Theory

3.10 Voltage Parallel Module The principle and output contact output for voltage parallel module is shown in Figure 3.10-1. 3.10-1. This module is used to the parallel connection to various voltage circuits. For double busbar arrangement, if one bus VT of both is out of service, then the signals of protection and measurement of voltage of all feeders connected with this bus shall use another bus VT (two buses shall operate in parallel). If parallel input circuit is latching circuit (such as most manual parallel), then connect the parallel connecting input contact between po sitive pole and n1 t erminal of DC power supply. If parallel input circuit is not latching circuit (such as remote parallel, separation), then connect the parallel and separation input contacts between n3 and n4 terminals of DC power supply respectively. N2 and n5 terminals are connected with the positive and negative poles of power supply respectively. When the parallel circuit operates, the indicator LED LD1 will be normally lit (red). Pwrn5 Local paralleling

n2

Pwr+

Remote paralleling Remote separation

LD1

n1

J7

D9

J7

R9

J1

J2

J3

D1 J4

D2 J5

D3 J6

D4 D7

D5

D6

R7R8

R5R6

J7

n3

R3R4 R1R2

n4 D8 J3

J6 n7

n8

n20

n19

J3 n9

n10

J6 n22

n21

J2

J5 n11

n12

n23

n24

J2 n14

J5 n13

n26

n25

J1

J4 n15

n16

n28

n27

J1 n18

J4 n17

n29

n30

Figure 3.10-1 Principle and output contact of voltage parallel module

The rear terminals of voltage parallel module are shown in the following table. Pin No.

Sign

Description

01

LocalParalle

Local paralleling signal input

02

Pwr+

Positive pole of power supply for voltage parallel module

03

RemoteParalle

Remote paralleling signal input

04

RemoteSeparate

Remote separating signal input

05

Pwr-

Negative pole of power supply for voltage parallel module

06

Blank 29



07~08

J3-1

Normally open contact 1 of the J3relay J3 relay

09~10

J3-2


11~12 11~12

J2-1


13~14

J2-2


15~16

J1-1


17~18

J1-2


19~20

J6-1


21~22

J6-2


23~24

J5-1


25~26

J5-2


27~28

J4-1

Normally closed contact 1 of the J4relay J4 relay

29~30

J4-2


30


4 Hardware

4 Hardware 4.1 Overview All CJX series devices have 14 slots, different types of CJX device is assembled by different modules combined with different integral panel.

4.1.1 CJX-01 F

E

ONBB1

ONBB2

C

ONBB1

ONBB2

B

ONBB1

ONBB2

A

9

ONBB1

ONBB2

8

7

6

5

52b

52b

52b

52b

52a

52a

52a

52a

4

3

2

1

Figure 4.1-1 CJX-01 panel layout

CJX-01 can be equipped with four control circuit modules (single tripping coil) and four voltage switch modules (with latch or without latch) at most, Figure 4.1-1 shows the front view layout of panel, 6-9 slots are control circuit modules, B~F slots are voltage switchover modules. Definitions of indicators on panel are as follows: “ON BB1” BB1” and “ON BB2” BB2” indicators are green, provided by voltage switchover module, used to indicate the current position of bus. “52b” 52b”: indicator is red and “52a” 52a”: indicator is red, provided by control circuit module, used to indicate the current state of circuit breaker. breaker. When the slot is not inserted by module, the corresponding indicator on panel is blank. Other blank module slots can adopt modules without indicator on demand, such as seal-in module or repeat relay module, and etc. (the same as below).

31


4 Hardware

4.1.2 CJX-02 F

E

LOCKOUT

C

LOCKOUT LOCKOUT

B

LOCKOUT

A

LOCKOUT

9

LOCKOUT

8

LOCKOUT LOCKOUT

7

LOCKOUT

6

5

4

3

2

1

LOCKOUT


CJX-02 can be equipped with eight LOCKOUT modules in 7-F slots. Figure 4.1-2 shows the front view layout of the panel. The LOCKOUT indicator on the panel is red, provided by LOCKOUT module, and is lit when LOCKOUT circuit acts, and is extinguished when it is resto red.

4.1.3 CJX-03 F

E

C

B

A

9

8

7

6

5

4

3

2

1


CJX-03 has several options of some seal-in modules or repeat relay modules, the specific configuration is determined according to the actual demand. Figure 4.1-3 shows the front view layout of the panel, without indicators.

32


4 Hardware

4.1.4 CJX-04 F

E

ONBB1

C

ONBB1

ONBB1

ONBB2

ONBB2

B

A

ONBB1

ONBB1

8

7

ONBB1

ONBB1

ONBB2

ONBB2

ONBB2

9

ONBB2

6

ONBB1

ONBB2

5

ONBB1

ONBB2

4

3

2

1

ONBB1

ONBB2

ONBB2


CJX-04 can be equipped with three voltage parallel modules in 2~4 slots, and equipped with ten voltage switchover modules in 5~F slots. slots. Figure 4.1-4 is the front view layout of the panel, and definitions of indicators on the panel are as follows: “ON BB1” BB1” and “ON BB2” BB2” indicators are red, provided by voltage switchover modules, used to indicate the current position of bus. “PARAL” PARAL” indicator is red, provided by voltage parallel modules, is lit when they are operated in parallel, and extinguished when they a re running separately.

4.1.5 CJX-11 F

E

ONBB1

ONBB2

C

B

A

9

ONBB1

ONBB2

8

7

52b

52b

52a

52a

6

5

4

3

2

1


CJX-11 is fixed in 8 and 9 slots, equipped with two control circuit modules, and equipped with two voltage switch modules in E and F slots. Figure 4.1-5 is the front view layout of the device, definitions of indicators on the panel are as follows: “ON BB1” BB1” and “ON “ON BB2” BB2” indicators are red, provided by voltage switchover switchover module, used to

33


4 Hardware

indicate the current position of bus. “52b” 52b” indicator is red, “52a” 52a” indicator is green, provided by control circuit, used to indicate the current state of circuit breaker.

4.1.6 CJX-21 F

E

ONBB1

ONBB2

C

B

A

ONBB1

9

8

7

6

5

4

3

2

1

52b

ONBB2

52a_1

52a_2


CJX-21 is fixed at 9, A and B slots, equipped with a set of control circuit module with double tripping coils and DC power supply switchover (card A, card B, card C), equipped with two voltage switch modules in E and F slots. Figure 4.1-6 shows the front view layout of the panel, definitions of indicators on the panel are as

follows: “ON BB1” BB1” and “ON BB2” BB2” indicators are green, provided by voltage switchover modules, used to indicate the current position of bus. “52b” 52b” indicator is red, “52a_1” 52a_1” and “52a_2” 52a_2” indicators are green, provided by control circuit module with double tripping coil, used to indicate the current state of circuit breaker.

34


5 In In s t a l l at at i o n a n d C o m m i s s i o n i n g

5 Installation and Commissioning 5.1 Introduction The chapter contains instructions on how to install and commission the protective device. It can also be used as a reference if a periodic test is performed. The chapter covers procedures for mechanical and electrical installation, energizing and checking of external circuitry, setting and configuration as well as verifying settings and performing a directionality test. The chapter contains the following information: 1.

The “Safety information” information” presents presents warning and note signs, which the user should draw

attention to. 2.

The “Overview “Overview ” gives an overview over the major task when installing and commissioning and commissioning the

protection equipment. 3.

The “Unpacking “Unpacking and checking the protective device” device” contains instructions on how how to receive

the protection equipment. 4.

The “Installing “Installing the protective device” device” contains instructions on how to install the protection

equipment. 5.

The “Checking “Checking the external circuitry ” contains instructions on how to check that check that the protection

equipment is properly connected to the protection system. The chapter is addressing the installation, commissioning and maintenance personnel responsible for taking the protection into normal service and out of service. The installation personnel must have a basic knowledge in handling electronic equipment. The commissioning and maintenance personnel must be well experienced in using protection equipment, test equipment, protection functions and the configured functional logics in the protection.

5.2 Safety Information This section contains safety information. Warning signs are presented which attend the user to be careful during certain operations in order to avoid human injuries or damage to equipment. 

Warning signs Warning! Strictly follow the company and country safety regulations. Working in a high voltage environment requires serious approach to avoid human injuries and damage to equipment. Do not touch circuitry during operation. Potentially lethal voltages and currents are present. Always avoid touching the circuitry when the cover is removed. The product contains electronic circuitries which can be damaged if exposed to static electricity (ESD). The 35



electronic circuitries also contain high voltage which is lethal t o humans. Always use suitable isolated test pins when measuring signals in in open circuitry. circuitry. Potentially lethal voltages and currents are present. Never connect or disconnect a wire and/or a connector to or from a protective device during normal operation. Hazardous voltages and currents are present that may be lethal. Operation may be disrupted and protection equipment and measuring circuitry may be damaged. Always connect the protection equipment to protective ground, regardless of the operating conditions. This also applies to special occasions such as bench testing, demonstrations and off-site configuration. Operating the protection equipment without proper grounding may damage both terminal and measuring circuitry, and may cause injuries in case of an accident. Never disconnect a secondary connection of current transformer circuit without short-circuiting the transformer’s secondary winding. Operating a current transformer with the secondary winding open will cause a massive potential build-up that may damage the transformer and may cause injuries to humans. Never unmount the front or back cover from a powered equipment or from a protection equipment connected to powered circuitry. Potentially lethal voltages and currents are present. 

Caution signs Caution! Always transport modules using certified conductive bags. Always handle modules using a conductive wrist strap connected to protective ground and on a suitable antistatic surface. Electrostatic discharge (ESD) may cause damage to the module. Do not connect live wires to the protection equipment. Internal circuitry may be damaged. Always use a conductive wrist strap connected to protective ground when replacing modules. Electrostatic discharge (ESD) may damage the module and protection equipment circuitry. circuitry. Take care to avoid electrical shock if accessing wiring and connection protection equipment when installing and commissioning.



Note signs Note! Changing the active setting group will inevitably change the protection equipment’ equipment’s operation. Be careful and check regulations before making the change. The protection assembly is designed for a maximum continuous current of four times rated

36



value. Activating the other setting group without proper configuration may seriously affect the protection equipment’ equipment’s operation.

5.3 Overview The settings for each function must be calculated before the commissioning task can start. A configuration, made in the configuration and programming tool, must also be available if the protection equipment does not have a factory configuration downloaded. The protection equipment is unpacked and visually checked. It is preferably mounted in a cubicle. The connection to the protection system has to be checked in order to verify that the installation was successful. The installation and commissioning task starts with configuring the digital communication modules, if included. The protection equipment can then be configured and set, which means that settings and a configuration has to be applied if the protection equipment does not have a factory configuration downloaded. Then the operation of each included function according to applied settings has to be verified by secondary injection. A complete check of the configuration can then be made. A conformity test of the secondary system has also to be done. When the primary system has been energized a directionality check should be made.

5.4 Unpacking and Checking the Protection Equipment Procedure 1.

Remove the transport casing.

2.

Visually inspect the protection equipment.

1)

Carefully examine the protection panel, protection equipment inside and other parts parts inside to see that no physical damage has occurred since installation.

2)

The rating information should be given for the protection equipment.

3)

The rating information of other auxiliary protections should be checked to ensure it is correct for the particular installation.

Panel wiring Check the conducting wire used in the panel to assure that their cross section meet the requirement. Carefully examine the wiring to see that they are no connection failure exists. Label Check all the isolator links, terminal blocks, ferrules, indicators, switches and push buttons to make sure that their labels meet the requirements of this project. Equipment plug-in modules Check each plug-in module of the equipments on the panel to make sure that they are well

37



installed into the equipment without any screw loosened. Earthing cable Check whether the earthing cable from the panel terminal block is safely screwed to the panel steel sheet. 1.

Check that all items are included in accordance with with the delivery delivery documents.

The user is requested to check that all software functions are included according to the delivery documents after the terminal has been energized. 2.

Check for transport damages.

These product checks cover all aspects of the protection, which should be checked to ensure that the protection not only has not b een physically damaged prior to commissioning but also fu nctions correctly and all input quantity measurements are within the stated tolerances.

5.5 Installing the Protective Device 5.5.1 Overview The mechanical and electrical environmental conditions at the installation site must be within permissible range according to the technical data o f the protection equipment. equipment . Dusty, Dusty, damp places, places liable to rapid temperature variations, powerful vibrations and shocks, surge voltages of high amplitude and fast rise time, strong induced magnetic fields or similar extreme conditions should be avoided. Please refer to 2 for 2 for details. Sufficient space must be available in front of and at rear of the protection panel to allow access for maintenance and future modifications. Flush mounted protection equipment should be mounted so that equipment modules can be added and replaced without excessive demounting.

5.5.2 Dimensions The device adopts IEC standard chassis and is rack with modular structure. It uses an integral faceplate and plug terminal block on backboard for external connections. CJX series device is IEC 4U high and 19” 19” wide. Figure 5.5-1 shows its dimensions and Figure 5.5-2 shows the panel cut-out.

38


5 In In s t a l l at at i o n a n d C o m m i s s i o n i n g 482.6 2 9 1

0 . 7 7 1

465.0

6 . 1 0 1

Figure 5.5-1 Dimensions 465.0

6 . 1 0 1

0 . 9 7 1

4-Ф6.8 450.0

Figure 5.5-2 Panel cut-out

5.5.3 Grounding Guidelines Switching operations in HV installations generate transient over voltages on control signal cables. There is also a background of electromagnetic RF fields in electrical installations that can induce spurious currents in the devices themselves or the leads connected to them. All these influences can influence the operation of electronic apparatus. On the other hand, electronic apparatus can transmit interference that can disrupt the operation of other apparatus. In order to minimize these influences as far as possible, certain standards have to be observed with respect to grounding, wiring and screening. Note! All these precautions can only be effective if the station ground is of good quality.

39



5.5.4 Cubicle Grounding The cubicle must be designed and fitted out such that the impedance for RF interference of the ground path from the electronic device to the cubicle ground terminal is as low as possible. Metal accessories such as side plates, blanking plates etc., must be effectively connected surface-to-surface to the grounded frame to ensure a low-impedance path to ground for RF interference. The contact surfaces must not only conduct well, they must also be non-corroding. Note! If the above conditions are not fulfilled, there is a possibility of the cubicle or parts of it forming a resonant circuit at certain frequencies that would amplify the transmission of interference by the devices installed and also reduce their immunity to induced interference. Movable parts of the cubicle such as doors (front and back) or hinged equipment frames must be effectively grounded to the frame by three braided copper strips (refer to Figure 5.5-3) 5.5-3). The metal parts of the cubicle housing and the ground rail are interconnected electrically conducting and corrosion proof. The contact surfaces shall be as large as possible. Note! For metallic connections please observe the voltage difference of both materials according to the electrochemical code. The cubicle ground rail must be effectively connected to the station ground rail by a grounding strip (braided copper). Door or hinged equipment frame

Cubicle ground rail close to floor

Braided copper strip Station ground Conducting connection

Figure 5.5-3 Cubicle grounding system

5.5.5 Making Electrical Connections Always make sure established guidelines for this type of terminal is followed during installation. When necessary use screened twisted-pair cables to minimize susceptibility. Otherwise, use any 40



kind of regular nonscreened tinned RK cable or equivalent. When using screened cabling always use 360° full screen cable bushing to ensure screen coupling. Ensure that all signals of the single circuit are in the same single cable. Avoid mixing current and voltage measuring signals in the same cable. Also use separate cables for control and measuring circuits. Connecting the auxiliary power All modules of the device demand to introduce DC operation power supply. The DC power supply will be connected to the input terminals of various modules after running in idle for some time. Input/output signal connectors The input and output circuits will be connected with the terminal board generally, external circuit will connect the relevant terminal board through dedicated cable.

5.6 Check the External Circuit The user must check the installation, which includes verifying that the relay is connected to the other parts of the protection system. This is done with the relay and all connected circuits de-energized. Checking the power supply Check that the value of the auxiliary supply voltage remains with the permissible range under all operating conditions. Check that the polarity is correct according to the instruction manual. Checking binary input circuits Preferably, Preferably, disconnect the binary input connector form the binary input cards. Check all connected signals so that both input level and polarity are in accordance with the relay’ relay’s specifications. Checking binary output circuits Preferably, disconnect the binary output connector form the binary output cards. Check all connected signals so that both load and polarity are in accordance with the relay’ relay’s specifications.

5.7 Insulation Test (if required) Insulation resistance tests are only necessary during commissioning if it is required for them to be done and they have not been performed during installation. Isolate all wiring from the earth and test the isolation with an electronic or brushless insulation tester at a DC voltage not exceeding 500V, The The circuits need to be tested t ested should include: 

DC power supply



Output contacts

The insulation resistance should be greater th an 100MΩ at 500V. Test method 41



To unplug all the terminals sockets of this protective device, and do the Insulation resistance test for each circuit above with an electronic or brushless insulation tester. On completion of the insulation resistance tests, ensure all external wiring is correctly reconnected to the protection

5.8 Final Check After the above tests are are completed, remove all test or temporary temporary shorting leads, etc. If it has been necessary to disconnect any of the external wiring from the protection in order to perform the wiring verification tests, it should be ensured that all connections are replaced in accordance with the relevant external connection or scheme diagram. Ensure that the protection has been restored to service. If the protection is in a new installation or the circuit breaker has just been maintained, the circuit breaker maintenance and current counters should be zero. If a test block is installed, remove the test plug and replace the cover so that the protection is put into service. Ensure that all event records, fault records, disturbance records and alarms have been cleared and LED’s has has been reset before leaving the protection.

42


6 Maintenance

6 Maintenance NR numerical relay is designed to require no special maintenance. All measurement and signal processing circuit are fully solid state. All input modules are also fully solid state. The output relays are hermetically sealed. Since the device is almost completely self-monitored, from the measuring inputs to the output relays, hardware and software defects are automatically detected and reported. The self-monitoring ensures the high availability of the device and generally allows for a corrective rather than preventive maintenance strategy. strategy. Therefore, maintenance checks in short intervals are not required. Operation of the device is automatically blocked when a hardware failure is detected. If a problem is detected in the external measuring circuits, the device normally only provides alarm messages.

6.1 Routine Check The device realizes complete self-check, so routine check can only involve some typical items recommended by our company, otherwise, users can run their own check regulations. When failures are found during routine check, please confirm them by the following contents: 

Check or test whether the circuit is properly connected



Whether the module is in correct position and located accurately



Whether the voltage of DC power supply is correct



Test flow strictly conforms to the requirements of debugging outline or o r related general rules

6.2 Replace Failed Modules If the failure is identified to be in the relay module and the user has spare modules, the user can recover the protection by replacing the failed modules. Repair at the site should be limited to module replacement. Maintenance at the component level is not recommended. Check that the replacement module has an identical module name and hardware type-form as the removed module. The module name is indicated on the top front of the module. Caution! When handling a module, take anti-static measures such as wearing an earthed wrist band and placing modules on an earthed conductive mat. Otherwise, many of the electronic components could suffer damage.

43


6 Maintenanc Maintenanc e

Replacing a module 

Switch off the DC power supply



Disconnect the trip outputs



Unscrew the module.

Adopt different procedures for different types of module Warning! Hazardous voltage can be present in the DC circuit just after switching off the DC power supply. supply. It takes approximately 30 seconds se conds for the voltage to discharge. d ischarge. Warning! Units and modules may only be replaced while the supply is switched off and only by appropriately trained and qualified personnel. Strictly observe the basic precautions to guard against electrostatic discharge. Warning! When handling a module, take anti-static measures such as wearing an earthed wrist band and placing modules on an earthed conductive mat. Otherwise, many of the electronic components could suffer damage.

6.3 Cleaning Before cleaning the relay, ensure that all AC/DC supplies, current transformer connections are isolated to prevent any chance of an electric shock whilst cleaning. Use a smooth cloth to clean the front panel. Do not use abrasive material or detergent chemicals.

6.4 Storage The spare relay or module should be stored in a dry and clean room. Based on IEC standard o

o

o

60255-6 the storage temperature should be from -25 C to 70 C, but the temperature of from -10 C o

to 40 C is recommended for long-term storage.

44


7 De De c o m m i s s i o n i n g a n d D i s p o s a l

7 Decommissioning and Disposal 7.1 Decommissioning 1.

Switching off

To switch off the protective device, switch off the external miniature circuit breaker of the power supply. 2.

Disconnecting Cables

Disconnect the cables in accordance with the rules and recommendations made by relational department. Danger! Before disconnecting the power supply cables that connected with the DC module of the protective device, make sure that the external miniature circuit breaker of the p ower supply is switched off. Danger! Before disconnecting the cables that are used to connect analog input module with the primary CTs and VTs, make sure that the circuit breaker for the primary CTs and VTs is switched off. 3.

Dismantling

The protective device rack may now be removed from the system cubicle, after which t he cubicles may also be removed. Danger! When the station is in operation, make sure that there is an adequate safety distance to live parts, especially as dismantling is often performed by unskilled personnel.

7.2 Disposal In every country there are companies specialized in the proper disposal of electronic waste. Note! Strictly observe all local and national regulations when disposing of the device.

45


7 D ec ec o m m i s s i o n i n g a n d D i s p o s a l

46


8 Manual Version History

8 Manual Version History In the latest version of the instruction manual, several descriptions on existing features have been modified. Manual version and modification history records Manual Version

Software

Date

New

Version

R1.00

None

2009-07-16

R1.00

R1.01

None

2009-10-19

R1.01

R1.02

None

2012-03-29

Source

Description of change

Form the original manual. The description about closing circuit with latching The description about tripping circuit with l atching Modify company name

47


8 Manual Manual Version Histo ry

48


01- CJX Interposing Relay Set

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