46-TMSS-03-R0

TRANSMISSION ENGINEERING STANDARD

46-TMSS-03, Rev. 0

TABLE OF CONTENTS 1.0

SCOPE

2.0

CROSS REFERENCES

3.0

APPLICABLE CODES AND STANDARDS

4.0

DESIGN AND CONSTRUCTION REQUIREMENTS 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8

5.0

TESTS 5.1 5.2 5.3

6.0

General System Operation Performance Characteristics and Ratings Control Panel Remote Status Monitoring Panel Wiring and Terminal Blocks Grounding Nameplate(s)

Routine Tests Type of Tests Field Tests

DATA SCHEDULE

46TMSS03R0/AMM

Date of Approval: December 16, 2006

PAGE NO. 2 OF 30


1.0

46-TMSS-03, Rev. 0

SCOPE This SEC Transmission Material Standard Specification (TMSS) specifies the minimum technical requirements for design, engineering, manufacture, inspection, testing and performance of indoor, completely integrated and solid state Uninterruptible Power Supply system (UPS) under redundant mode intended to be used in the system of the Saudi Electricity Company, Saudi Arabia.

2.0

CROSS REFERENCES This Material Standard Specification shall be read in conjunction with the SEC General Specification No. 01-TMSS-01, titled "General Requirements for All Equipment/Materials", which shall be considered as an integral part of this TMSS. This TMSS shall also be read in conjunction with SEC Purchase Order or Contract Schedules for project as applicable.

3.0

APPLICABLE CODES AND STANDARDS The latest revisions of the following Codes and Standards shall be applicable for the equipment/material covered in this TMSS. In case of conflict, the vendor/manufacturer may propose equipment/material conforming to one group of Industry Codes and Standards quoted hereunder without jeopardizing the requirements of this TMSS. 3.1

IEC 60146

Semi-Conductor Converters

3.2

IEC 60478

Stabilized Power Supplies, D.C. Output

3.3

IEC 60529

Classification of Degrees of Protection Provided by Enclosure.

3.4

IEC 60947

Low voltage switchgear and control gear

3.5

IEC 62040-1-1

Uninterruptible Power Systems (UPS) – General and Safety Requirements for UPS Used In Operator Access Areas

3.6

IEC 62040-1-2

Uninterruptible Power Systems (UPS) – General and Safety Requirements for UPS Used In Restricted Acess Locations

3.7

IEC 62040-2

Uninterruptible Power Systems (UPS)- Part 2: Electromagnetic Compatibility (EMC) Requirments

3.9

IEC 62040-3

Uninterruptible Power Systems (UPS)- Part 3: Method of Specifing the performance and Test requirments

3.8

IEEE 446

Recommended Practice for Emergency and Standby Power System for Industrial and Commercial Application.

46TMSS03R0/AMM


PAGE NO. 3 OF 30


4.0

46-TMSS-03, Rev. 0

3.9

ANSI C37.90.1

Guide for Surge Withstand Capability Tests.

3.10

ANSI C62.41

Guide for Surge Voltages in Low Voltage A.C. Power Circuits.

3.11

ANSI C63.4

3.12

NEMA ICS6

Measurement of Radio Noise Emission from Low Voltage Electrical and Electronic Equipment in the Range of 10 KHz to 1 GHz. Enclosures for Industrial Controls and Systems

3.13

NEMA 250

Enclosures for Electrical Equipment (1000 Volts Max.)

3.14

ANSI/NFPA 70

National Electrical Code

3.15

UL 1778

UL Standard for Safety Uninterruptible Power Systems

3.16

46-TMSS-01

Vented Type Lead-Acid Stationary Battery Bank

3.17

46-TMSS-02

Battery Charger

3.18

46-TMSS-04

Valve Regulated, Lead-Acid (VRLA) Stationary Battery Bank

3.19

46-TMSS-06

Vented Nickel Cadmium Battery

DESIGN AND CONSTRUCTION REQUIREMENTS 4.1

General 4.1.1

The system shall be designed to consist of two UPS modules operating in parallel. Each module shall be sized to independently carry the full A.C. critical load and consist of solid state rectifier/ charger, solid state inverter, static transfer switch(es), manual bypass switch(es), self contained independent controls, instruments, annunciators, including battery system and remote monitor panel, if specified.

4.1.2

The UPS module shall be fully automatic and completely solid state except for circuit breakers and manual bypass switch which shall be electro mechanical. All power semi-conductor circuits shall be fused and provided with indicating lamps to show the fuse conditions.

4.1.3

The UPS shall provide regulated A.C. power to critical loads from unregulated A.C. power source under both normal and abnormal conditions, including during loss of the A.C. power. The storage battery shall be connected to the D.C. input of the Inverter module through a circuit breaker.

4.1.4

The UPS shall have three (3) inputs, in which two (2) of them are normal A.C inputs and third one is alternate source A.C. The inverter shall convert the D.C. power to the sinusoidal A.C. power which shall be supplied to the critical load(s). The two UPS units, each of 100% capacity will normally work in parallel, each sharing 50% UPS load. On failure of any UPS unit, its

46TMSS03R0/AMM


PAGE NO. 4 OF 30


46-TMSS-03, Rev. 0

load gets automatically transferred to the other UPS unit through static transfer switch. If the battery power is exhausted to specified limit per clause 4.3.2 before normal A.C. power returns, the inverter shall shutdown automatically. The third alternate source shall provide power to the critical load in the event of failure of both the units of UPS/inverter or during maintenance. The output of the two (2) units of UPS shall be synchronized with the alternate A.C. power source provided that the alternate A.C power source is within the specified voltage and frequency range per clause 4.3.3. 4.1.5

The UPS specific ratings shall be as specified in Data Schedule of this specification.

4.1.6

The capacitors for control circuit application shall be computer grade.

4.1.7

The UPS system shall be supplied with a built-in surge protection against over-voltage and over-current including lightning surges on the primary A.C. source and on the output caused by the load transfer and retransfer between the two (2) units of the UPS system and alternate AC source..

4.1.8

Electromagnetic effects shall be minimized to ensure that computer systems, or other similar electronic systems shall not adversely affected by UPS and vice versa. UPS shall meet EMC requirements per IEC 62040-2 or equivalent standards.

4.1.9

Provisions shall be made for testing the control circuits. All adjustments and tests shall be possible with the use of a standard volt-ohm-milliampere meter and oscilloscope. Test points shall be provided to allow easy adjustment of the controls. It shall be possible to carry out easy and speedy repairs on control circuits.

4.1.10 The system shall contain no continuously moving parts other than cooling fans (if specified) which shall have sealed bearings. 4.2

System Operation The UPS system shall be capable of being operated in any of the following modes: 4.2.1

Normal Mode The UPS System with two (2) UPS units shall be connected in parallel during normal operation, each sharing 50% of UPS loads and capable of carrying 100% of the total critical A.C. loads in case of the failure of one. UPS unit shall provide regulated A.C power to critical load through static switches SS1 & SS2 as in Fig. 1. The rectifier(s)/charger(s) shall simultaneously provide D.C power to inverter(s) and maintain a common battery in fully charged float condition. During normal mode alternate source is stand-by.

46TMSS03R0/AMM


PAGE NO. 5 OF 30


4.2.2

46-TMSS-03, Rev. 0

Failure of One UPS On maintenance or failure of any UPS unit for any reasons, its load shall be automatically transferred to the other healthy UPS unit through static transfer switch . UPS shall simultaneously provide D.C power to inverter(s) and maintain the common battery in fully charged float condition.

4.2.3

Failure of both UPS In the event of failure of the second UPS due to loss of the normal A.C source or any other reasons while carrying 100% load, when first UPS system is already off-line, the battery shall automatically feed D.C . power to the inverter without any interruption to the critical loads with the charger/rectifier isolated from the UPS to prevent back feed from the battery for specified time mentioned in clause 4.3.2.b . During the battery back-up time if any one of the UPS is restored then its charger shall supply the inverter and recharge the battery. All this shall be an automatic function and shall cause no disturbance to the critical load(s).

4.2.4

Alternate Mode Upon failure of inverters or failure of inverters DC input, UPS overload, DC bus overvoltage and power factor correction failure, load shall be automatically transferred to alternate source through static switch SS3 without interruption of power. After one inverter is returned to normal voltage and stabilized for a period of at least 2 to 5 seconds, retransfer shall be accomplished by automatic synchronization and allowing the inverter to ramp into the load and then the alternate source shall be disconnected. Transfer to alternate source and retransfer to the main source (after returning to normal conditions) whether initiated automatically or manually shall not occur if the two sources are not in synchronism within three (3) electrical degrees and voltages per clause 4.3.3. Failure of synchronism shall initiate an alarm.

4.2.5

Bypass (Emergency) Operation Bypass operation using manual by-pass switch shall be considered as an emergency operation during breakdown of both the UPS and completely drained batteries and the load is no longer properly backed-up. Unless the system is forced to switch by manual intervention, this mode has the lowest priority and shall be avoided if possible.

4.3

Performance Characteristics and Ratings 4.3.1

46TMSS03R0/AMM

Battery Charger


PAGE NO. 6 OF 30


a.

46-TMSS-03, Rev. 0

The charger/rectifier output shall regulate the inverter input voltage and maintain float voltage of the battery. The charger/rectifier output shall maintain the inverter input D.C. voltage within the inverter input specifications, and also maintain the battery float and equalize voltage within the battery specifications over the specified input voltage range.

b.

4.3.2

4.3.3

The battery charger shall be in accordance with the applicable requirements of SEC Materials Standard Specification 46-TMSS-2 and rated as specified in Data Schedule.

Batteries a.

Batteries shall be in accordance with the applicable requirements of SEC Material Standard Specification 46-TMSS-1 or 46-TMSS-4 or 46-TMSS-6 as applicable and rated as specified in the relevant Data Schedule.

b.

The battery bank shall be capable of maintaining the UPS output at full rated load for a minimum of two hours unless otherwise specified in data schedule.

c.

The battery shall be furnished with D.C. circuit breakers alongwith a normally open pair of alarm contacts.

d.

The battery rated voltage shall be l25Vdc unless otherwise specified in data schedule.

e.

The battery shall be situated outside the UPS module and may be located on battery racks or in separate battery cabinet.

Inverter a.

General i.

The inverter module shall consist of D.C. filter capacitors, D.C. surge protection, a solid-state inverter, an output isolation transformer, an output filter and control circuitry to provide precise A.C. voltage regulation and electronically controlled current limiting.

ii.

The inverter shall be capable of accepting the output of the rectifier/charger or battery and shall provide precisely regulated low distortion sine-wave rated output within the limits specified. The inverter shall be furnished with a shielded isolation type output transformer.

iii.

46TMSS03R0/AMM


PAGE NO. 7 OF 30


iv.

b.

46-TMSS-03, Rev. 0

Test points shall be provided to facilitate adjustments and diagnosis. Provisions shall be made for easy testing of logic circuitr y without operating the power circuits.

Control And Protection i.

The inverter shall be electronically protected against short circuit. In addition the inverter input and output circuits shall be adequately protected by fast acting fuses to prevent damage to the solid-state devices in the inverter bridges, as well as to avoid cascading failures. Each fuse shall be provided with a blown fuse indicator having an alarm light on the control panel.

ii.

The inverter output shall be both fused and electronically current limited.

iii.

The input of the inverter shall have banks of D.C. filter capacitors. Each bank shall have separate fuses. The loss of one bank shall not alter the performance of the UPS.

iv.

The inverter input shall have D.C. surge protection to assure proper operation in the event that there are surges or spikes on the inverter input. The surge withstand capability shall be per ANSI C37.90.1

v.

The output voltage regulation shall be automatically and continuously held constant within + 0.5% of the setting for balanced loads and + 2% for 50% unbalanced loads under any of the following conditions: o o o o

vi.

Load variations from 0 to 100% Lagging power factor from 1 to 0.7 Minimum to maximum D.C. input voltage 25 - 40°C ambient temperature

The inverter transient response shall not exceed +10% of the output voltage under the following conditions: o o o

100% load application or removal. Transfer of rated load to alternate source. Removal of parallel module.

Recovery to within +2% of the steady state value shall take place within 25 ms and to +1% within 50 ms. In the event of loss or return of input power, the transient response shall not exceed ±5%.

46TMSS03R0/AMM


PAGE NO. 8 OF 30


46-TMSS-03, Rev. 0

In the event of retransfer of 100% load from alternate source, the transient voltage shall not exceed +1%. vii.

The control circuitry shall automatically synchronize and phase-lock the two (2) inverters output and the alternate power source as long as the source is within +0.5 Hz of the preset frequency. If the alternate power source is not within these limits, then the control circuitry shall break synchronization and lock to an internal oscillator (free running). Upon restoration of the alternate source within the specified tolerances, the inverters shall resynchronize with the source at the frequency slew rate specified in item 'ix'.

viii

The output frequency of each inverter shall be controlled by oscillators. The oscillators shall be temperature compensated and be adjustable to +5% of the rated frequency. The oscillator shall hold the inverter output frequency to +0.1% for both steady state and transient conditions.

ix.

The frequency slew rate shall be limited to 1 Hz/second with 0-100% load variations, minimum to maximum D.C. voltage and 25-40°C ambient temperature changes.

x.

The control circuitry shall interface with a D.C. low voltage sensor and turn off the inverter at 1.75 volts per cell level to prevent damage to the battery.

xi.

The total harmonic distortion (THD) content in voltage shall be maximum 1.5 % of the fundamental output amplitude over entire load range, with battery disconnected.

xii.

The control circuitry shall electronically limit the output current of the inverter by dropping the A.C. voltage when the output current exceeds set limit. The setting range shall be from 100% to 110% of the inverter rating. Under fault conditions, the inverter shall have adequate overload capability to safely withstand fault currents for the time required for clearing the fault.

46TMSS03R0/AMM

xiii.

The maximum phase-to-phase displacement of the inverter output voltage shall be limited to /120°+1° (electrical degree) for balanced load and/or /120°+3° for 50% unbalanced loads.

xiv.

The inverter line-to-line and line-to-neutral output voltage unbalances shall not differ by more than the following: Balanced Loads: +1% from the arithmetic average o of the 3 phases.


PAGE NO. 9 OF 30


o

o

20% Unbalanced Load: +1% from the arithmetic average of the 3 phases. 50% Unbalanced Load: +2% from the arithmetic average of the 3 phases.

xv.

The inverter shall have a control to manually adjust the output voltage within +5% from the rated value.

xvi.

The inverter shall have a control to manually adjust the output frequency within +2Hz from the rated value.

xvii.

The control circuitry shall provide a low voltage initial startup of the inverter and ramp up to full voltage in less than 5 seconds.

xviii

In case of internal failures, the protection system shall have the control logic capable of isolating only the faulted unit with minimum damage to the system and shall not shut down the entire UPS System. Fault shall be indicated by appropriate alarm lights on the control mimic panel.

xix.

Each fuse failure shall be provided with a blown fuse indicator with an alarm light on the control panel.

xx.

Temperature sensors shall be provided to monitor temperature of critical components. Upon detection of temperature in excess of component manufacturer's recommended working temperature, the sensors shall cause audible and visual alarms.

xxi

Inverter shall be capable of deleivering the following short circuit/overload based on the nominal rating:

• • • •

4.3.4

46-TMSS-03, Rev. 0

105% continuous 125% for 10 minutes 150% for 1 minute 200% for 100 ms

Efficiency The efficiency of the UPS when measured between A.C. input and A.C. output shall be 85% or higher at rated full load under the following conditions:

46TMSS03R0/AMM

a.

The battery be fully charged and floating on the system

b.

The input voltage be within the specification

c.

The load power factor be between unity and 0.80 lagging Date of Approval: December 16, 2006

PAGE NO. 10 OF 30


4.3.5

46-TMSS-03, Rev. 0

Audible Noise Noise generated by the UPS under any condition of normal operation shall not exceed 60 dB measured at 1.0 meters from the nearest surface of the cabinet(s).

4.3.6

Static Transfer Switch a.

The static transfer switches shall be designed and sized as per arrangement mentioned in clause 4.2 above and for an automatic transfer of critical load in either direction between UPS source and the alternate source under conditions described in items c, d and e. The control unit of the switch shall contain an automatic transfer circuit which senses the status of the inverter logic signals, alarm conditions, synchronizes the inverters to the alternate source to put them in phase and ensure an uninterrupted transfer of the load.

b.

The static transfer switch output shall be synchronized to the alternate source line voltage regulator. If the alternate power source is not within normal voltage limits, then the transfer shall be inhibited.

c.

The maximum power transfer time in either direction between the units of UPS source and between them and the alternate source shall not exceed 1/4 cycle (4.2 milli-seconds). This 1/4 cycle time shall be composed of the sum of the maximum times required to sense a transfer condition and time to actually transfer the power.

d.

The over load capability of the static transfer switch shall be as follows: i ii iii

4.3.7

125% of UPS continuous 300% of UPS for 30 seconds 1000% of UPS for l00 milli-seconds

e.

Fuses shall be provided in the inverters and alternate sources of the static transfer switch against overcurrents.

f.

The static switch shall be provided as an integral part of the UPS, unless otherwise requested in Data Schedule.

g.

The static transfer switch shall be designed for ease of maintenance and removal during bypass operation.

Emergency Shutdown Activation of the local emergency shutdown shall cause, input, output circuit breakers to open, completely isolating the UPS from all sources of power. The battery bank shall also be isolated to prevent discharge. The critical load

46TMSS03R0/AMM


PAGE NO. 11 OF 30


46-TMSS-03, Rev. 0

shall be automatically transferred to the alternate source uninterrupted when the emergency shutdown is activated. 4.3.8

Manual Bypass Switch A manually operated maintenance bypass switching arrangement shall be provided which permits bypassing the critical loads to the alternate A.C. power source without interruption of power to those loads, per clause 4.2.5. The bypass switch shall incorporate interlock mechanism to prevent out of synchronization transfer.

4.3.9

Bypass Transformer A dry isolation transformer with screen with class H insulation system shall be applied to the bypass circuit in case of unequal main configurations and/or voltage level (bypass mains input to UPS output).

4.3.10 Specific Rating The UPS specific ratings shall be as specified in Data Schedule. 4.4

Control Panel The UPS system shall have the following controls, meters/instrumentations, alarms/indicating lights mounted on the front panel face. All indicating lights shall be high intensity LEDs. 4.4.1

Meters The following meters, as minimum requirement, shall be provided for each system:

46TMSS03R0/AMM

a.

An input voltmeter each for normal and alternate supply sources along with phase selector switch.

b.

An input ammeter each for normal and alternate supply sources along with phase selector switch

c.

An output voltmeter with selector switch

d.

An output ammeter with selector switch

e.

A D.C. battery voltmeter

f.

A D.C. battery charge/discharge ammeter

g.

Output frequency meter (58-62 Hz) with adjustment control

h.

Input frequency meter Date of Approval: December 16, 2006

PAGE NO. 12 OF 30


i.

46-TMSS-03, Rev. 0

Output power factor meter

Note: All instruments shall be switchboard type, flush fitted and dimensioned 96mm x 96mm min. with +1% to ±1.5% full range accuracy. Alternatively precise digital meters may be provided. 4.4.2

Alarms A front panel mounted audible alarm shall be provided. The following urgent and non-urgent alarm indications as minimum requirement, with flashing displays shall be provided for each system. The flashing shall stop and steady light shall be displayed when the alarm is acknowledged. The steady light shall persist until reset by push-button after the alarm has been cleared. Urgent alarms shall be distinguished by red LEDS, whereas yellow LEDS shall be provided for non-urgent alarms. The following functions shall be provided with duly wired alarm contacts available for connections to audible alarm system or to the remote alarm panel as applicable: S.N Alarm Function a. Inverter/static by-pass overload alarm b.

√

c.

Inverter fuse failure alarm

√

d.

Charger fuse failure

√

e.

D.C. undervoltage alarm

f.

D.C. ground fault trip alarm

√

g.

D.C. overvoltage trip alarm

√

h.

A.C. (output) undervoltage trip alarm

i.

A.C. (output) overvoltage trip alarm

√

j.

√

l.

Input power failure alarm for each AC input Input wrong sequence/out of tolerance alarm Battery discharging alarm

m.

Control Circuit fuse failure alarm

√

n.

Frequency control failure alarm

√

o.

By-pass Static switch failure alarm

√

p.

Inverter Static switch failure alarm

√

q.

UPS on battery alarm/charger failure alarm Static switch on alternate source position alarm Alternate source failure alarms/trip

r. s.


Non-Urgent

√

Power Module Over-temperature alarm

k.

46TMSS03R0/AMM

Urgent

√

√

√ √

√ √ √ PAGE NO. 13 OF 30


4.4.3

t.

alarm Loss of synchronism alarm

u.

Battery circuit breaker open

√

v.

Emergency shutdown

√

w.

Fan failure alarm

x.

Output out of tolerance alarm

√

√ √

Status Indications a.

The following status indications shall be provided for each UPS system and as minimum requirement: i. ii. vi. vii. v. vi. viii. ix. x. xi. xii.

b.

4.4.4

46-TMSS-03, Rev. 0

Charger on Battery circuit breaker open – closed Input circuit breaker open-close Output circuit breaker open-close Alternate source available Synchronization monitor Static transfer switch position Inverter on / alternate source/bypass synchronized Inverter Load on inverter Load on static bypass

A module mimic bus with lights shall be provided. It shall give the status indication of all the circuit breakers and the static transfer switches, including manual by pass switch.

System Controls Each UPS system shall have the following minimum controls:

46TMSS03R0/AMM

a.

A.C. output voltage adjustment control.

b.

Output frequency adjustment control

c.

D.C. input undervoltage shutdown adjustment

d.

D.C. float voltage adjustment

e.

D.C. equalize voltage adjustment

f. g.

D.C. current limit adjustment D.C. high voltage trip adjustment

h.

Rectifier input circuit breaker close-open

i.

Battery circuit breaker close-open Date of Approval: December 16, 2006

PAGE NO. 14 OF 30


4.4.5

j.

Inverter output breaker close-open

k.

Inverter start push button

l.

Inverter stop push button

m.

Emergency shutdown push button (with protective cover)

n.

Transfer mode selection switch (manual-automatic)

o.

Manual by-pass switch

p.

Static transfer switch

q.

Lamp test/reset push button

r.

Audio alarm test /acknowledge push button

s.

Inverter current limit adjustment

t.

Alternate source circuit breaker close-open

Construction a.

The UPS equipment shall be housed in a free standing front access enclosure. The cabinet enclosure shall be made of welded sheet steel having 3mm minimum thickness with appropriate framing to provide strength and rigidity. The cabinets shall be designed to be placed flush against wall or side by side.

b.

The UPS enclosure protection shall be as per 01-TMSS-01 requiring access from the front for all servicing adjustments and connections. The access door shall have a handle with provision for padlocking.

c.

All instruments, indicators and controls shall be flush mounted. Components and subassemblies shall be mounted in open construction style so that each may be easily replaced. The equipment shall be constructed so that each power component can be replaced without a soldering iron or special tools. Cable entries/ connections shall be through the top/bottom of the cabinet as specified in the data schedule along with suitable cable glands. Module control fuses shall be accessible from the front of the module without requiring cabinet door to be opened. Forced air cooling system shall be provided, if specified in data schedule. The failure of forced cooling system shall not cause any degradation in the output characteristics of the module, under the specified ambient. Fan failure shall initiate an alrm.

d.

46TMSS03R0/AMM

46-TMSS-03, Rev. 0


PAGE NO. 15 OF 30


4.5

46-TMSS-03, Rev. 0

e.

Air inlets shall be located near the bottom, and air outlets at the top of the enclosure. All inlets shall be equipped with air filters for dust proofing. The air filters shall be either disposable or cleanable and accessible for removal without opening the door(s). All the openings shall be protected against vermins by suitable metallic grills

f.

Thermostatically controlled space heater(s) rated 220Vac shall be provided in the enclosure with manual bypass switch.

g.

Lighting controlled by toggle or door switches shall be provided in the enclosure. Switches shall be identified with engraved or embossed nameplates. Fluorescent strip lights are preferred over incandescent lights.

h.

Appropriate provisions shall be made for hoisting, jacking and forklift handling of the UPS.

i.

An approved schematic diagram of the UPS identifying various components and referring to the appropriate drawings and erection instructions shall be affixed to the inside of the cubicle access door. The diagram shall be marked on durable non-fading material suitable for the specified climatic conditions.

Remote Status Monitoring Panel 4.5.1

A remote panel shall be provided, if required per data schedule to monitor the status of the UPS system. The panel shall be wall mounting type. A mimic bus shall be provided on the panel.

4.5.2

46TMSS03R0/AMM

The panel shall contain the following indicators, alarm and controls: a.

UPS System ON

b.

UPS System OFF

c.

“UPS on Battery” Alarm

d.

Battery Under Voltage Alarm

e.

Static Switch position

f. g.

Primary A.C. power supply available Ammeter and voltmeter for UPS input.

h.

Ammeter and voltmeter for alternate source

i.

Ammeter and voltmeter for UPS output Date of Approval: December 16, 2006

PAGE NO. 16 OF 30


4.6

46-TMSS-03, Rev. 0

j.

Ammeter and voltmeter for battery

k.

Audible alarm with reset push button

l.

Lamp test/reset push button

m.

Emergency shut down push button with protective cover

n.

Critical load indicator

Wiring and Terminal Blocks 4.6.1

All wiring within the UPS shall be installed and tested at the factory unless otherwise specified. All wiring shall be heat and flame retardant, rated 90°C maximum operating temperature, type SIS as listed in ANSI/NFPA 70 or approved equivalent, rated 600/1000V, with insulated tinned stranded annealed copper conductor, and shall not be smaller than 2.5 mm². For the wiring of solid state devices, smaller size wires may be acceptable only if the associated device cannot accommodate larger wire sizes. All wires shall be adequately rated for thermal withstand of short circuit currents.

4.6.2

Color coding of panel wiring shall be as follows : a.

D.C. circuits

: Gray (Trip circuits shall be provided with red ferrule at the terminal block)

b.

Alarm circuits :Blue

c.

A.C. power circuits : 4 Core :Red, Yellow, Blue, Black (Neutral) 3 Core :Red, White or Yellow, Blue for phase 3 Core :Red, White or Yellow, Black (Neutral) for 2 phase 2 Core :Red, Black (Neutral) 1 Core :Black

4.6.3

46TMSS03R0/AMM

1 Core :(Usage limited to grounding Conductor) Green or Green with Yellow stripes Wiring shall be made without splices. The control wires shall have solderless insulated ring type terminals, tin-plated copper crimp type. Spade type wire lugs shall not be used. Date of Approval: December 16, 2006

PAGE NO. 17 OF 30


46-TMSS-03, Rev. 0

4.6.4

Terminal blocks shall be of non-captive pan head screw type and shall be mounted on ground rails. No more than two conductors shall be terminated at one terminal point. If additional terminations are needed, flat preformed jumpers shall be provided.

4.6.5

Terminal blocks for different voltages, D.C. and A.C. wiring shall be grouped separately, and where possible, mounted on different terminal strips. Terminals shall be functionally grouped together.

4.6.6

All wiring internal to the UPS assembly shall be laid in accessible wiring troughs throughout the entire length of the UPS panel assembly. The A.C. wiring shall be bundled separately from D.C. wiring in the same raceway. Signaling cables shall be shielded type and run in a separate raceway and shall be separated as far as practical from all power cables and at right angle to such wiring when the spacing is less than 150 mm.

4.6.7

Cable supports shall be provided for wiring run directly to instruments or devices. Wiring extensions from raceways or bundles to instruments and devices shall be neatly formed, securely tied or clamped and supported to the UPS framework. Bends in the wiring shall be carefully made in such a manner that the insulation is not damaged.

4.6.8

Wiring for lights, space heaters and convenience outlets may be run in the same raceway in individual cubicles and in rigid or PVC jacketed flexible conduits between cubicles. Wiring of meters/relays mounted on doors shall be mechanically protected.

4.6.9

All internal wiring terminations shall be identified by legible markings at the device terminals. Each end of every wire leaving a cubicle shall be identified indicating termination point and destination as per IEC 60391. All internal wiring shall have identification showing both locations of termination at each end of the wire. All wiring terminating on terminal blocks shall have the terminal identification repeated on the terminal block itself. Markers shall be of ferrule type, permanently marked and shall be made of material that will not deform or deteriorate and shall withstand a temperature of 90°C. Adhesive type terminal markers are not acceptable.

4.7

Grounding 4.7.1

A copper ground bus, 25 mm x 6 mm in size, running the entire length of the panel line-up, shall be provided. The ground bus shall be located approximately 50 mm above the bottom of the panel.

4.7.2

Two (2) solderless ground connectors shall be provided on the ground bus, one on each end section of the bus for connection to station grounding

46TMSS03R0/AMM


PAGE NO. 18 OF 30


46-TMSS-03, Rev. 0

system. The ground connectors shall be suitable for bare copper ground conductor of 120 mm².

4.8

4.7.3

At all points of connection between the ground bus and the panel assembly, any non-conductive coatings, such as paint, shall be removed or penetrated to ensure good electrical contact.

4.7.4

All hinged doors and panels shall be effectively grounded by unspliced flexible ground wires.

4.7.5

Devices or equipment mounted on the panel shall be grounded as required. Each grounding connection to the ground bus shall be arranged so that each may be disconnected without disturbing the continuity of the ground bus or any other ground connection.

4.7.6

The UPS A.C. output neutral shall be electrically isolated from the enclosure and shall be connected to the power neutral ground.

Nameplate(s) 4.8.1

46TMSS03R0/AMM

The UPS shall bear a nameplate fixed on the front side of the panel. The plate shall be marked in English with the following minimum information: a.

The words "Uninterruptible Power Supply"

b.

Rated capacity kVA

c.

Manufacturer's Name

d.

Year of Manufacture

e.

Manufacturer's Serial Number

f.

SEC Purchase Order No./Contract No./J.O. Number

g.

46-TMSS-3, Rev.0

h.

UPS Input o Number of phases o Number of wires Voltage (Vac) o Ampere (A) o Frequency (Hz) o

i.

D.C. input Voltage range (Vdc) o Rated voltages (Vdc) o Current, max. o


PAGE NO. 19 OF 30


5.0

j.

UPS Output Same data as (h) above

k.

Alternate input Same data as (h) above

l.

Maximum weight (kg)

46-TMSS-03, Rev. 0

4.8.2

Appropriate identification in the form of engraved or embossed nameplate shall also be provided for each power module/component (charger rectifier, inverter, static transfer switch etc.) and front mounted equipment of UPS.

4.8.3

All customer termination points shall be identified by legible marking at the appropriate terminal blocks.

4.8.4

The nameplate material shall be stainless steel and shall be fastened to the equipment by stainless steel screws or rivets and shall be easily visible.

TESTS All standard tests shall be carried out on complete UPS systems in accordance with IEC, UL, IEEE and/or ANSI Standards as applicable. 5.1

Routine Tests 5.1.1

All Routine tests prescribed herein shall be performed on all UPS systems exclusive of the battery bank. UPS systems shall be Tested with both power unit operational.

5.1.2

UPS Rectifier Routine tests per IEC 60146-1-1 or equivalent standard shall be performed on the UPS rectifier unit.

5.1.3

UPS Inverter Routinet test per IEC 60146-2 or equivalent standard shall be performed on the UPS inverter unit.

5.1.4

Monitoring and Control Equipment Test Following tests shall be carrried out. a.

Insulation Resistance

b.

Control Tests Operation of the following items/functions shall be tested: i.

46TMSS03R0/AMM

Instrumentation ° Accuracy ° Operation upon command Date of Approval: December 16, 2006

PAGE NO. 20 OF 30


ii.

iii.

iv. v. 5.1.5

46-TMSS-03, Rev. 0

Annunciation ° Sensor operation ° Fault alarms ° Display operation ° Status command Logic ° Protective functions ° Normal operation functions Operator Controls Self Diagnostic Controls

UPS Characteristics All tests per Table 3 and Table 4 (including optional test) of IEC 62040-3 or equivalent standard shall be performed. Load test shall cover both manual and automatic, transfer and retransfer characteristics between UPS inputs and alternate supply. In addition the following tests shall be peformed: i. ii. iii.

5.2

No load Forced air cooling tests (if applicable) Surge withstand capability

Types Tests 5.2.1

Type tests shall be performed in accordance with IEC, UL and IEEE as applicable on the representative UPS system or on the first unit of every new design, rating or size to be supplied to SEC.

5.2.2

Certified test reports of type tests performed on identical UPS systems acceptable to SEC may be submitted for review and acceptance in lieu of the required design (type) tests above.

5.2.3

Design (type) tests shall include but not be limited to the following:

46TMSS03R0/AMM

a.

Dielectric test

b.

Load test/temperature rise test

c.

Current limit test

d.

Static voltage deviation test (Voltage regulation)

e.

Efficiency measurement

f.

Power factor measurement

g.

Ripple voltage measurement

h.

Surge withstand capability Date of Approval: December 16, 2006

PAGE NO. 21 OF 30


5.2.4

5.3

46-TMSS-03, Rev. 0

i.

Audible noise test

j.

Checking the coordination of protective devices

k.

Checking properties of the trigger equipment

l.

Checking properties of incorporated stabilization means

All circuits connected to the A.C., power control input and output terminals, except electronic components, shall be capable of withstanding a test voltage of 2000 volts rms, 60 Hz, to ground for one (1) minute.

Field Tests 5.3.1

The manufacturer representative shall be available upon request to supervise on-site field tests after the UPS system has been installed. SEC shall notify the manufacturer one month in advance. The manufacturer shall submit a list of field test based on Table 4 of IEC 62040-3 with test procedures for SEC approval before carrying out on site testing of equipment and components.

5.3.2

All instruments, equipment and materials and associated devices for proper performance of these on-site tests shall be included in the Bid.

5.3.3

Any load banks required or a dummy load equal to the UPS output kilowatt rating shall be furnished by the contractor.

5.3.4

On-site tests shall be performed under existing ambient conditions.

46TMSS03R0/AMM


PAGE NO. 22 OF 30


46-TMSS-03, Rev. 0

DWG * : 46TMSS03.01.01

46TMSS03R0/AMM


PAGE NO. 23 OF 30


6.0

46-TMSS-03, Rev. 0

DATA SCHEDULE

UNINTERRUPTIBLE POWER SUPPLY, 5kVA THROUGH 100 kVA SEC Enquiry No.

Date:

SEC Purchase Order No. or Contract No.

Date:

SEC PTS No./Project Title with J.O. No. REFERENCE SECTION NO.

DESCRIPTION

'A'

3.0

APPLICABLE CODES AND STANDARDS

*

—

U.P.S Model No. and/or Type No.

*

4.0

DESIGN AND CONSTRUCTION REQUIREMENTS

4.1

General

'B'

'C'

Application Type of System Grounding (Solidly ground,Resistance ground,Other) Design ambient temperature (°C)

*

'A'- SEC SPECIFIED DATA/PARAMETER. 'B'- BIDDER/SUPPLIER/VENDOR/CONTRACTOR PROPOSED DATA/PARAMETERS. 'C'- REMARKS SUPPORTING THE PROPOSED DEVIATION IN COLUMN 'B'. (*)- DATA/PARAMETER TO BE PROVIDED/PROPOSED BY THE BIDDER/SUPPLIER/ VENDOR/CONTRACTOR IN COLUMN 'B'.

46TMSS03R0/AMM


PAGE NO. 24 OF 30


6.0

46-TMSS-03, Rev. 0

DATA SCHEDULE

UNINTERRUPTIBLE POWER SUPPLY, 5kVA THROUGH 100 kVA REFERENCE SECTION NO. 4.2

DESCRIPTION

'B'

'C'

UPS System Configuration Type of system

4.3

'A'

Redundant

Performance Characteristics and Ratings UPS Input Characteristics Input kVA –Full load Rated Input Voltage (Vac) Number of Phase(s) Number of Wires Voltage adjustment range(%) Frequency (Hz) Frequency adjustment range (%) Rated current (A) Maximum current (A) Soft start (Power walk-in) time to full load (sec.) Current Limit Setting range (%) Power factor (Lagging) at rated input voltage Inrush current Duration of inrush current Input Circuit Breaker Type Frame ampacity Trip ampacity Short circuit capability Inverter input characteristics D.C. voltage range (Vdc) maximum minimum Current (max) (A) No load current (A)

46TMSS03R0/AMM

* 60 * * * * * *

From

To

* * * *

* * * * *


PAGE NO. 25 OF 30


6.0

46-TMSS-03, Rev. 0

DATA SCHEDULE

UNINTERRUPTIBLE POWER SUPPLY, 5kVA THROUGH 100 kVA REFERENCE SECTION NO.

DESCRIPTION

'A'

'B'

'C'

UPS Output Characteristics Inverter output characteristics Rated voltage (Vac) Number of Phase(s) Number of Wires Frequency (Hz) Power rating at 0.8 power factor (kVA) Voltage regulation under following condition(%) Balanced loads 50% balanced loads 0 - 100% load variations at 0.8 p.f. 0 - 100% load variations at 1.0 p.f. Minimum to maximum D.C. bus rating 25 - to 40°C Any combination Transient Response (%) under : 50% load application or removal 100% load application or removal Transfer of rated load to alternate source Removal of parallel module if applicable Retransfer of 100% load from alternate source

60

* * * * * * *

* * * * *

Transient Recovery Time (sec.) to : Within ±2% Within ±1%

* *

Voltage adjustability range (%)

*

Voltage unbalance (%) with balanced loads 20% unbalanced loads 50% unbalanced loads 100% unbalanced loads

* * * *

46TMSS03R0/AMM


PAGE NO. 26 OF 30


6.0

46-TMSS-03, Rev. 0

DATA SCHEDULE


DESCRIPTION

'A'

Phase displacement (Degree) with: 100% Unbalanced load 50% Unbalanced load 25% Unbalanced load Frequency Adjustability range (%) Line synchro range (%) Regulation (stability) free running % Slew rate max. (Hz/sec)

* * * *

Current Overload capability withstand 125% (minutes) 150% (sec.)

* *

Fault Clearing Capability 150% (cycles) 300% (cycles) 800% (cycles)

* * *

Harmonic distortion (THD) content with battery disconnected (%) Total Individual harmonic voltage distortion (%) Odd harmonics Even harmonics

'C'

+ + +

+ + +

1.5 1.0 0.5

Efficiency (%) at 100% load 50% load 75% load 25% load

* * * *

Static Transfer Switch Separate or internal part of inverter Maximum transfer time (cycles)

* *

46TMSS03R0/AMM

'B'


Yes/No

PAGE NO. 27 OF 30


6.0

46-TMSS-03, Rev. 0

DATA SCHEDULE


DESCRIPTION

'A'

Overload capability for 125% load 300% load (sec.) 1000% load (ms)

countinuous * *

Inverter Technology Mode of inversion Temperature rise (°C)

Solid state * *

Audible alarms required Battery charger/rectifier Input voltage (Vac) Output voltage (Vdc) Rated current

'B'

'C'

Yes/No

Attach duly filled in data schedule of the Specifications # 46-TMSS-2 Battery Type of battery Rated voltage (Vdc) AH capacity at 30 minute discharge time 8 H discharge Time. 10 H discharge Time Protection (full load supply) time (minutes) Maximum discharge current

125 * *

*

Attach duly filled in Data Schedule of specification #46-TMSS-1 (vented) or 46-TMSS-4 (valve regulated) as applicable 46-TMSS-06 Vented Nickel Cadmium Battery Audible noise measure at 1.5 meters (dB)

*

Alternate Source Input Requirements Rated voltage (Vac) No. of phases No. of wires Frequency (Hz)

46TMSS03R0/AMM

60


PAGE NO. 28 OF 30


6.0

46-TMSS-03, Rev. 0

DATA SCHEDULE

UNINTERRUPTIBLE POWER SUPPLY, 5kVA THROUGH 100 kVA REFERENCE SECTION NO. 4.5

4.7

DESCRIPTION

Remote status monitoring Panel required Location and mounting Mimic bus on the panel required Construction Type of cooling Forced cooling (if applicable) No. of fans Voltage (Vac) Power consumption of each fan (W) Air displacement capacity (cmh) Provision of space heater, if applicable Voltage (Vac) Type of control Access External Connection Energy Bypass transformer required(only if A.C. input voltage is different than UPS output).

'A'

'B'

'C'

Yes/No

Yes/No

* * * * * * * * Front Bottom

Yes/No

Yes/No

Construction If yes, give data : Rated power (kVA) Rated voltage ratio (kV) Number of phase (1 or 3) Line voltage regulator required (provide other details) Dimensions Height (mm) Width (mm) Depth (mm) Total Weight (kg) Cable access Cabinet finish

46TMSS03R0/AMM

* * * * * *


PAGE NO. 29 OF 30


6.0

46-TMSS-03, Rev. 0

DATA SCHEDULE

UNINTERRUPTIBLE POWER SUPPLY, 5kVA THROUGH 100 kVA

A.

ADDITIONAL TECHNICAL INFORMATION OR FEATURES TO BE SPECIFIED BY SEC

B.

ADDITIONAL SUPPLEMENTARY DATA OR FEATURES PROPOSED BY BIDDER/VENDOR/SUPPLIER/CONTRACTOR :

C.

OTHER PARTICULARS TO BE FILLED UP BY BIDDER/VENDOR/SUPPLIER/ CONTRACTOR :

Actual Manufacturer of Material

Vendor/Supplier/ Contractor

Name of the Company Location and address

Name and Signature of Authorized Representative and Date Official Seal/Stamp of the Company

46TMSS03R0/AMM


PAGE NO. 30 OF 30

46-TMSS-03-R0

Recommend Documents