NWO- CFA Cell, 8"' Floor, Corporate Office,Bharat Sanchar Bh5wan, H.C. Mathur LaneJanpath, New Delhi-1 10001Tel No 01 1-23716688, Fax No 23766033Email: nwocfa@bsnl.co.in BilAnAT sAlt0l{AR illg$l iltdtTEs

No.7-ll2Ol4/MSE Dated: 12.O5.2O15

To

All the Chief General ManagersTelecom Circle/Telecom District.

Sub: Technical specification for UPS-Regarding.

The specification of UPS to be used in BSNL network has been

m o d i f i e d a n d i s e n c | o s e d a t @ . F u r t h e r , i t i S t o m e n t i o n t h a t t h i s i s

in supersession of the specifications of UPS issued from this office. As decided

by the competent authority it is reiterated that for the UPS system of more

than 60KVA capacity only modular type UPS should be purchased.

Enclosure: As above.

(Mrinal Jain)

AGM (MS rr)

c{rffi{qrtFr.rq tdfi{ig( qKd 1T{sR qr rc;Fq)

BHARAT SANCHAR I'IIGAM LIMITEI)(A Go!,t. of lndia Enterpr'se) UNINTERRUPTED POWER

SUPPLY (UPS) SYSTEMISSUE - I: May'2015

SPECIFICATION ON

UNINTERRUPTED POWER SUPPLY(UPS) SYSTEM

No. : BSNl/Specification/UPS - 001/01/May' 2015

BHARAT SANCHAR NIGAM LIMITED

(A Government of India Enterprise)'

Bharat Sanchar Bhawan, JanPath,

Website: www.bsnl.co.in

NEW DELHI _ l IO OO1, INDIA

All Rights Reserved and no part of this publication may be reproduced, stored in a retrievalsystem or transmitted, in any form or means, electronic or mechanical, photocopied, recorded,scanned, without written perrnission from the Bharat sanchar Nigam Ltd., New Delhi (A

Government of India Enterprise), Bharat Sanchar Bhawan, Janpath, New Delhi - 110 001'Website: www.bsnl.co.in

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Clause No. Descrfution Of Ile4C Page No.INTRODUCTION 3

1.0 Scope J

1 . 1 IIPS System ConceP!1.2 UPS System Requircment -t

1.3 UPS System Configuration 4 - 6

1.4 UPS System Rating 7

2.0 TECHMCALREOUIREM ]T{TS OF UPS SYSTEM 8 - 1 2Table - 1 Operating Noise t2Table - 2 Correction Factor fc : Operating Noise 12

GENERAL REQT]IREMEI\ rS OF UPS SYSTEM 13 -17

4.0 SAFTY REQUIREMENTS)FIJPS SYSTEM 18

Block Schematic of StandalorSvstem - Fis.l

: UPS or Standalone (1+1) UPS l 9

Block Schematic of Modular IPS System - Fig.2 20

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Introduction

1.0 Scope:

This document contains the Generic Requirements ofUPS (Unintemrpted Power Supply) Systems based

on switch Mode Power Supply (sMPS) tecbniques for providing unintemrpted AC power to the

equipment associated with various telecom systems.

1.1 UPS System ConcePt:

UPssystemusedfortelecomapplication,envisagedinthisspecification,workson..oNLINE,'concept'In this concept, under normal operating conditions, the AC load is fed by the inverter unit of the UPS

system, whicir in tum derives its DC power from Rectifier unit, while the battery remains-floated across

the output ofthe Rectifier unit. The i{ectifier unit draws AC power ffom the commercial AC mains or

stand by DG set.

I n theeven to f i n tenup t i on in theACinpu t to theuPs , theDCpower to the inve r te run i tge tsinstantly transferred to battery, so that AC output of the inverter unit remains uninterrupted' under

this condition the battery gets discharged.

when the commercial AC mains is restored or the Engine Altemator is switched 'oN" the DC power to

the inverter unit, again, gets instantly transferred back (without any interruption to the.load) to the

Rectifier unit. On reitoration ofAC miins, Rectifier unit always operates in "Charge Mode".

It enables the Rectifier to give higher current to the battery to recoup its lost capacity-faster. when the

battery gets fully recouped-the Reitifier unit reverts back to the float mode, automatically.

1.2 UPS system requirements:

UPS system consists mainly of the following building blocks:

1. Distribution, Switching, Control & Alarm @SCA) unit: Provides for Distribution, Switching,

Monitoring, Control and alarm of the UPS unit / System'

2. Rectifier: Rectifier unit is used for conversion ofAC into regulated DC'

3, Battery Bank Battery of suitable capacity for providing power to the inverter when Rectifier unit is

not working due to any reason.

4. Inverter Unit: lnverter unit shall be capable of providing unintem.rpted AC power to the Telecom

Equipment.

5. Static Transfer Slvitch: Static Transfer Switch is for transferring the load, automatically to AC

mains (regulated or unregulated). Transfer of load back to UPS shall be auto/ manual but it shall

take plicel only after the inverter output has stabilized and is within the specified limits.

6. Manual Transfer Switch: Manual trarsfer switch is for the transfer ofload from inverter to Stand by

power and back to Inverter unit, manually without the interruption of power to the load' The

interlocking inverter operation should be prevented ffom unsynchonized switches.

T.VoltageRegu|ator:VoltageRegulator(VR)isforprovidingStandbyregulatedACpower(asperthepurchaseCs requirement) to the telecom equipment.

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1.3 UPS System Configurations:

UPS systems envisaged in this specification may be:a) A Standalone UPS ORb) Standalone (1+1) UPS SYstem ORc) Modular UPS SYstem.

[.3.1 Standalone UPS or Standalone (1+l) UPS Systems:

This type of system shall be a single unit ofrequired capacity without redundancy or two similar units in

(1+1)-configuration with redundircy capable of sharing load with other UPS unit of same rating and

lnat ",

in syi.h.onous load sharing mode. This type of syitem shall have the components as inverter unit,

rectiirer unit and DSCA, Static iransfer Switih, and Manual Transfer Switch, all housed in a single

cabinet. The system shall have the battery ofthe desired rating as per backup requir.ements. Refer Block

Diagram Fig. 1. In case of Standatone (t+t; upS system, separate AC input shall be made available

from the LT Panel for each UPS'

Note: The stand alone UPS system of given capacity shall be a single unit. Paralleling of smaller

capacity UPS systems to achieve the required capacity is not allowed'

1.3.2 Modular UPS SYstems:

In these types of systems, uPS is composed of the pluggable type basic modules_ and each module has

the builclirg block as: One rectifier unit, on" inverter unit. Static Transfer Switch, Manual Transfer

switch and DSCA unit in this concept will be common for the ultimate system capacity (as envisaged by

the user) proposed to be constituted by paralleling of these UPS unit. DSCA rmit provides for all the

control, monitoring alarm function, und n""".ru.y terminations/switches as per the specification. In

addition to this, th; DSCA shall also have the capability of operating its inverter unit in sYnchronous

mode with the inverter units of other UPS units ofiame make and rating. This t)?e of LIPS unit shall be

capable of sharing load with other UPS units of same rating and make, in synchronous load sharing

.od". R.f., Block Diagram Fig. 2. The AC input to the rack shall be separate for each rack from LT

Panel, if mofe than one rack is- used. The battery shall be as per the desired rating of the UPS' The

battery AH capacity will be according to the battery backup requirement'

Note: Any loweimodule shall become the part of functional bus only after successful

completion of built in self testing of power module by common controller;otherwise it

shali deactivate/disconnect itself from common bus and raise appropriate alarm.

1.3.2.1 Redundancy criteria for Modular UPS System:

The maximum number of UPS modules in a system shall be N, where N is the number of basic UPS

units decided as per the load requirement ofthe user / purchaser, and I is redundant unit.

1.3.3 Distribution, Switching, Control & Alarm Monitoring @SCA) unit:DSCA unit shall be part of individual uPS unit. It shall be based only on menu driven Micro Processor

controlled Techniques for control, monitoring & alarms. DSCA shall display its Software version.

Setting of all the parameters stratt Ue ttlrough menu-driven microprocessor control only. Use of

poteniiometer at any stage is precluded. The fiilure of Micro processor or DSCA shall.not affect the

ietting of individuai inverter oi Rectifier. No parameter of inverter or Rectifier units shall be disturbed

on thJ f.il*" of DSCA. In this condition all the inverter and Rectifier shall take care of the load on

default settings and share the load collectively (wherever applicable). Only the setting of new

Darameters from DSCA shall be affected'

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UPS System configurations

The following UPS System configurations are proposed:

(i) STANDALONE UPS or STANDALONE (1+1) IIPS SYSTEM Configuration:

CategoryNo.

Type ofSvstem

Ratings

Input /Output

System(Ultimate)

BasicInverter

Basicrectifier

StaticTransferSwitch

ManualTransferSwitch

BatteryCapacity

1 a lPh/1Ph l KVA lKVA *Inveder +battery

requirement

1.1 KVA 1.1 KVA As perback-up

1b lPh/lPh 2 KVA 2KVA -do- 2.2KVA 2,2KVA As perback-up

1c lPh/1Ph 3 KVA 3KVA -do- 3.3KVA 3.3 KVA As perback-up

2a 1Ph/1Ph 5 KVA 5KVA -do- 5.5 KVA 5.5 KVA As perback-up

2b 1Ph/1Ph 6KVA 6KVA -do- 6.6 KVA 6.6 KVA As perback-up

2C lPl/1Ph lOKVA lOKVA -do- l1KVA 1lKVA As perback-up

3a 3Ph/lPh lOKVA lOKVA -do- l1KVA 11KVA As perback-up

15KVA lsKVA -do- 16.5KVA 16.5KVA As perback-up

2OKVA 15KVA -do- 22KVA 22KVA As perback-up

3OKVA 2OKVA -do- 33KVA 33KVA As perback-up

3b 3Ph/3Ph lOKVA lOKVA -do- 1lKVA l IKVA As perback-up

l5KVA I5KVA -do- 16.5KVA 16.5KVA As perback-up

2OKVA 1sKVA -do- 22KVA 22KVA As perback-up

3OKVA 2OKVA -do- 33KVA 33KVA As perback-up

3c 3Ph/3Ph-do-

40/60/80/100r20t16012OO KVA

4OKVA -do- 110Vr 1l0o/o As perback-up

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n .--mb,:;i6 n*^.nA/

Annexure I(ii) MODULAR UPS SYSTEM Confisuration:

CategoryNo.

Type ofSvstem

Ratings

InpuUOutput

SystemConliguration

**cN+1)

BasicUPS

BasicRectifier

StaticTransferSwitch

ManualTransferSwitch

BatteryCapacity

l a ThreePhase

4OKVA(N+l)

r0/t6t20KyA

*Inverter +battery

requirement

44KVA 44KVA As perbackup

1b ThreePhase

6OKVA61..1+r)

10/16/20KVA

66KVA 66KVA As perbackup

1 c ThreePhase

8OKVA6g+l)

10n6/20KVA

-do- 88KVA 88KVA As perbackup

2a ThreePhase

IOO KVA15+l)

16120/25KVA

-do-

110 KVA 110 KVAAs perbackup

2b ThreePhase

16OKVA(N+1)

(max 2 Raoks)

16t20/25KVA

-do- 176KVA 176KVA As perbackup

2c ThreePhase

2OOKVA(+N+1)

(max 2 Racks)

16120/25KVA

-do- 220KVA. 220KVA As perbackup

3a ThreePhase

250 KVA(N+1)

(max 3 Racks)

l6/20/25KVA

-do-27sKVA 275KVA.

As perbackup

3b ThreePhase

3OOKVA(N+1)

(max 3 Racks)

16120125KVA

-do- 33OKVA 33OKVA As perbackup

+ The rating ofrectifier shall be sufficient to take care of 1.1 times the Inverter DC load and batteryload as per back-up and rate ofcharging. 6

** In this configuration N is the desired rating of Basic UPS units for load as decided bypurchaser, and I is redundant.

Note:1. TSEC approval shall be accorded for ultimate capacity only. The version ofthe microprocessor

Soft-ware shall be indicated in TSEC along with the model number and category.2. Hot swappability & user replaceability ofpower modules, static switch module, controller module, power

supply module etc. must be ensured.3. Tendering authority may choose any of the above categories (ultimate capacity) as per load

requirements. Load shall include the equipment load and any other load. While choosing the UPSit may also be ensured that the redundancy requirement has been taken care of.

4. Tendering authority shall give the capacity of the battery to be used and battery back up in hours.5. Tendering authority shall specify Standalone UPS System or l+1 configuration UPS System or

Modular UPS System while Ordering the System.

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. *^v

f.4 UPS System Rating: Specified ratings of UPS systems are:

Type ofIJPS

Stand alone IJPS or Standalone(1+1) UPS Svstems

Modular UPS Systems

Input /Outnut )

lPh/lPh 3Ph/lPh 3Ph/3Ph 3Ph/3Ph 3Ph/3Ph

UPSratings

lKVA2KVA3KVA5KVA6KVAlOKVA

lOKVAl5KVA2OKVA3OKVA

lOKVA15KVA2OKVA3OKVA4OKVA6OKVA8OKVAlOOKVAI2OKVAl6OKVA200KvA

4OKVA,6OKVA& 80KVA withbasic UPSmodule rating ofl0KvA/16 KVA/20KVA

IOOKVA, 16OKVA,200KvA,250KVA &300KVA with basic UPSmodule rating of16KVA/2OKVA/25KVA

Note:

l. The rating of charger (Rectifier unit) shall be as per back-up and battery-orde_red capacity. The static

Transfer Switch and trlanual Transfei switch shali be rated at 1.1 times of the UPS rating (i.e 110% of

Load). The rating ofthe battery shall be as per back-up requirement'

2. It is agreed that for more than 60KVA capacity only modular type UPS shall be procured

3. Single phase and thee phase UPS system shall be configured by single phase and three phase

UPS unit only at both UPS unit as well as rack level.

1,5 IIPS system compatibility with Engine Alternator:

The UpS system (including Rectifiers, and DSCA, Inverters), shall be suitable for operation from A.C

mains or a DG set (of capacity 1.25 times AC load of UPS System)'

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,,t,-rl\\ , t ^ t P A

CHAPTER-2

2.0 Technical Requirements of UPS Systeml

Sl. No. Technical Requirements Single Phase output Three Phase output

tAl AC Input Operating Range& Frequency

l70V to 270V (Nom.230V)48 to 52IIz

320V to 480V (Nom. 400V)48 to 52Hz

IBI Charger @R/FC) @requencies I ol(Flz and above'

Auto Float-cum-Charge mode.1 Operation

2 Charger Voltage(Float /Charge)

Depending uPon the numberof Cells used and Cell Voltage(2.25Y 12.3V Per cell or 13.5V/13.8V per mono-block).

Depending upon the numberof Cells used and Cell Voltage(2.25Y 12.3Y per cell or 13.5V/13.8V per mono-block).

3 Charger Efriciencyi). At nominal input,

output and load between75o/o lo 100Vo

ii). For other specified InPut,output conditions & loadbetween 50% to 100%.

Better than 89%

Better than 85%

Better than 90%

Better than 87%

4 Peak to Peak Ripple <1olo of DC Bus Voltage

J Battery ThFery shall be Sealed Maintenance Free \IRLA Battery'

In case of 12V (6 cells) mono-block VRLA Battery maximum

nermissible capacitv is - 200AH. For batteries of capacity higher than

iooag, onty )V iells shall be used. Paralleling of 2V cells of AH

capacity up to 1500 AH is not permitted.tn' cus" of Mono-block VRLA Battery paralleling of two Banks(maximum) is Permitted.Note:1). Pluggable Modular Mono-Block types VRLA Batteries are also

acceptable.2). Onlv TSEC/TEC approved Batteries shall bs qpqqqqgl-

6 Battery Backup Sfrall be as mentioned in the Ordering lnlormation'

Bafte,y monitortng Feature shall be provided for -

i). Battery Under Voltageii). Baftery Current Limitingiii). BatteryTemperature compensatron.

7 Battery monitoring Feature

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Sl. No. Technical Requirements Single Phase output Three Phase output

tcl Output Characteristicsflnverter) :

8 Inverter Output PowerCapacity

(i) Standalone UPS SYstem orStand alone (1+1) UPSSystem:

a).1KVA to 10KVA - SinglePhase input and Single PhaseoutpuI.

b).10KVA to 30KVA - ThreePhase input and Single Phaseoutput.

Details ol UPS Configuration andratings are given in Table - 3 ofSpecification.

(i) Standalone UPS System orStand alone (1+1) UPSSystem:

a). 10KVA to 30KVA - ThreePhase input and Three Phaseoulpur.

b). 40KVA to 200KVA - ThreePhase input and Three Phaseoutput.

(ii). Modular UPS System :40KVA to 300KVA with

Basic Module rating of 10KVA,16 KVA, 2OKVA & 25KVA iN(N+1) configuration. Three Phaseinput and Three Phase Output.Details ofUPS Configuration andratings are given in Table - 3 ofSpecification.

-Note: Separate AC input shall be made avallable from L I Panel. lor

individual rack. In case ofmodular UPS system, Separate ACinput shall be made available from LT Panel, for individualrack if more than one rack is used.

9 Output Voltage of Inverter Shall deliver continuousunintenupted single Phase Puresine wave output at 230Y/50H2.

Shall deliver continuousuninterrupted thrce phase pure sinewave output at 400V/50H2.

10 Output Voltage Settable Shall be settable in stePs of210122012301240v

Shall be settable in steps of380/400/415V

1 l Output Voltag€ Stability + 2% ofthe Set Voltagefor -1. Input voltage variation in the range specified.2. Load cunent variations from zero to 100% (full load)3. Load power factor

Better than 0.8

The o,.rtput frequency shall be synchronised to Mains at all times' It

shall revert Io a frequency of 50Hz+ 0'5Hz on battery operation

mode /during failure of Mains

Better than 0.8

t2 Output Frequency

13 Load Power Factor

t4 Inverter Efficiency O. F- L""d b"tt "ett

?5% to 100% and Input DC Voltage of2.1SV/Cell to 2.3V/Cell or12.9Vl mono-block to 13.8V/ Mono-block and Output voltage of

230V : Not less than 857.(ii). For other Input, Output and Load Conditions: Not less than 80%o

ffi distortion shall not be more than 30lo in

conformity with CIGREs (hrtemational Conference on Large HiglVoltage Electric Syslems ) limits

15 Total HarmonicDistortion

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^(l\-.,

Sl. No. Technical Requirements Sinqle Phase output Three Phase outPut

16 Soft Start Feature: ffiuch that the input current andinput voltages of Rectifrer unit reach their nominal value within 10seconds. The maximum instantaneous cunent during start up shall notexceed the peak value ofthe Rectifier input current at full load and thelowest specified inPut voltage.

17

18

Transient Response The transient overshoot shall not exceed l07o wlth battery rloateounder the following conditions, provided it gets restored within

regulating range within 100ms :

1. Switch ON2.Step change of input voltage specified and vice-versa3.Load change from 100% to 10oZ and vice-versa

Note : For test purposes, Transient overshoot at the output can be up to

30% when the battery not floated at the input, provided it is restored

within the limit of 10% under two cycles (40ms) and regulating range

within l00msStatic Transfer Switch ffihandling 110% Load of the rated

system capacity shall be provided to transfer the load automaticallywithin 5 mS to AC Commercial /Stand-by Mains through isolationarrangement, in case the inverter fails to take load due to any reason'

The tiansfer of Load back to Inverter shall be automatic in case the

inverter has tripped momentarily due to sudden Over Load or

transients. The transfer time in this case shall also be within 5ms'

It shall take place, only after the inverter output has stabilizedand is within the specified limits However transfer of load back to

inverter shall be Manual in case the Inverter has developed a Fault'

19 Manual Transfer Switch ffif handling 1 1o% Load ofthe ratedsystem capacity shall be provided to transfer the load to ACiommercial / Stand-by Mains and back to UPS without the interruption

of oower to the load.

20

2 l

Over Load Shall be c"pabk oftaking 105% for 1 Hour/ 110% for 30 minutes

of its full rated load. In case ofexcessive over load or short circuitat the output the Inverter shall trip'

Operating NoiseUPS System up to :1OKVA < 5OdBA10KVA to 40KVA <55dBA40KVA to 100KVA <60dBA100KVA to2OOKVA < 65dBA200KVA and above <70dBAFor Modular UPS System:20 KVA to 60 KVA <70dBAup to 120 KVA <73dBA

ftt" n tty equipped UPS system at full load shall not contribute noise(weighted) as per the limits mentioned in the !4bp;-!.ihe ieference ambient noise level is taken as 45dBA.The noise levelshall be measured at a distance of 1 metre from the unit and 1.25m

above the floor level in the Acoustic Range. The correction factor

for Total Noise when the ambient noise level is more than 45dBAshall be as given in the Table - 2.Note: Correction Factor shall be added to the limit specified to arriveat the limit when the Ambient Noise is greater than 45dBA.

22 Elevated Burn-in Test Th" ".-pt"t"

UPS .y.t"m shall be capable ofwithstanding a Bum-intest of50"C for 72 Hours during TSEC and 24 Hours during Bulk QAtesting. This test may be conducted in a temperature controlled bum in

temoeiature controlled burn in chamb.t a1 JQ [+ 2C with free aircirculation inside the chamber

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Sl. No. Technical Requirements Single Phase output Three Phase output) a Cooling Arrangement Natural Convention Cooling or Forced Cooling. Fans can only be used

on the front/top and rear ofthe unit. -se offans on the sides ofthe unitor rack is not permitted. Manufacturer shall also ensure that the failureofthe fan does not cause any fire hazard. Failure offan shall drawImmediate attention ofthe maintenance staff. Fan shall be switched offwhen output ofthe unit fails due to any reason and shall startautomatically on the restoration oftheir output.

24 Metering There shall be provision on UPS level to monitor the following:i) AC Input Voltage to UPSii) AC Output Voltage & Current of UPSiii) Output frequencyiv) Output Power of UPS in Watts / K. Watts (above 5 KVA)v) DC Voltage to Invertervi) Battery Cunent (charge / discharge).The above anangement shall be made through a Digital meter withLED/LCD display. The Digital meter's display/Resolution should besuch that it is clearly and unambiguously readable from a distance of 1meter. The display unit shall be provided at a convenient height foreasy readout.

t< Protections Adequate Protections shall be provided for :

1. DC Reverse Polarity at input (Through Fuse).2. DC Under Voltage3. DC Over Voltage4. Outpul Voltage High5. Output Voltage Low

26 Functional & AlarmIndications

Functional & Alarm Indications shall be provided by means ofvisualdisplay (LED/LCD) :A).Functional Indications:

1) Mains available2) Charger on (Boost / Float)3) Load on Inverter4) Load on Standby Power

B) Alarm Indications:1) AC Mains Input out of range or AC Mains Fail2) Charger (FR/FC) Fail3) Inverter Fail4) Fan Fail5) Battery Low or No Battery (separate for each Battery)6) System Over Load7) Temp. Sensor Fail/Open8) Lightning Protection Stage - 2 Device fail (tlrough PFC)

Audio alarm Every Alarm condition shall be accompanied with an Audio alarm, with

a non locking type Key or push button having audio cut-offfacility.

28 Operating Temperature &RII

0 to 50 Deg C & RH 95% Non condensing

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,vr0.,

Sl. No. Technical Requirements Single Phase output Three Phase output

29 Dimensions rmt=tm;iamr*tr;t not be more than i000 mm from front door(when provided) to rear with door fitted. The width shall not be morethan i 100 mm (max) and height shall not be more than 2200mm(max).

30 Stage -2 Protection This protection against, low voltage surges of up to 1.5- KV, shail be

provided at the UPS system level. This protection shall be equippedwith thermal disconnection and potential free contact for arresto(s)

connected between live & neutral and neutral & earth. This protection

shall be in compliance of IEC 62305 & 60364-5-53 for the followingvalues of current:Between R Y. B & N: > In: IOKA, 8/20pS for each phase.

BetweenN&PE : > In: 20KA, 8/20PS.Where In: Value ofnominal discharge current 8/20pS.Note: Voltage rating of MOVs shall be 320V minimum. Responsetime of the Stage II device shall be < 25 nano seconds' The Stage- 2

Protection Device shall be CACT approved

UPS System Equipment Noise Permissible Max Noise (weighted)w.r.t Ambient Noise level of 45dBA

Up to 10KVA <5OdBA 5dB

10KVA to 40KVA <55dBA 1OdB

40KVA to 100KVA <60dBA 15dB

100KVA to 200KVA < 65dBA 20dB

200KVA and above <7OdBA 25dBFor Modular UPS Systemi). 20KVA to 60 KVAii). Up to 120KVA

<7OdBA< 73dBA

25dB28dB

Table - 1: Operating Noise

Table - 2: Correction Factor (C.F) for Total Noise

Note: The conection Factor shall be added to the limit specified of60dBA to arrive at the

limit when the ambient is greater than 45dBA.

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f-. -

AMBT.NOISE

C.F AMBT.NOISE

C.F AMBT.NOISE

C.F AMBT.NOISE

C.F

45dBA 0 d B 49dBA 0.86dB 53dBA 2.07d8 57dBA 3.69dB

46dBA 0.18dB5OdBA Ll2dB 54dBA 2.47d8 58dBA 4.17d8

47dBA 0.39dB 51dBA 1.41dB 55dBA 2.82d8 59dBA 4.68d8

48dBA 0.61d8 52dBA 1.73dB 56dBA 3.25dB 6OdBA 5.2ldB

" ri\0-

3.0

3.1

CIIAPTER3

General Requirements

Constructional Features: The rack structure shall be made up of rigid and self-supportingstructure of steel profiles. It shall be free of sharp edges or comers. The sides shall have

suitable ventilating arrangements. The fiont door (if provided) & rear door shall be hinged

type. Rear door dfront door (if provided) shall have proper v€ntilation arangement. Use of

ianr on th" sides for forced ventiiation is precluded as the racks are mounted side-by-side in

the field. The gauge of panels shall be 2 mm (minimum).

The structural strength of the rack shall be such as to withstand its ultimate mechanical load(with all the individual units mounted) without any deformity.

The base of rack shall ensure uniform floor loading of not more than 320 kg/sq. meter.

Lifting facilities shall be provided by removable eyebolt,located at the top of the rack/unit.

The nicessary arrangement for fixing the rack/unit on the floor shall also be provided.

The top ofthe rack shall be flrlly covered except for ventilation & cable entries' Each air flow

vent shall be covered by a grill to prevent the entry of foreign material larger than 5mrn.

with doors in position, all the common visual alarms and meters shall be clearly visible. In

case of hinged door, meters and alarm indications are permitted on door also. However, the

fixtures on the door shall not restrict the movement ofdoor in any way'

The rack shall be designed for easy maintenance & irstallation. Rack mourting arrangement

shall be such as to provide .*y u"."r, ftom front, rear and top for Installation and

Maintenance.The rack shall be made standalone with a rigid framework with bottom clearance of 110 mm

with a tolerance of +/- 10mm.

In case of Modular system if more than one uPS can be accommodated in a rack there shall

be provision of easily mounting tolremoving from the fron1 side of the rack. In such case

UPb unit shall be designed to slide into the rack on a suitable mechanical arrangement. The

associated AC, DC connections, control, alarms & interface cable connecting the unit shall

be connected/disconnected easily without causing any interruption in the suPPlY and

damage to load or other working unis. The units as per this GR shall not be site specific.

In case of Modular systems, the units shall be removable from the front ofthe rack only. All

AC and DC input, DC and AC output and control, alarm and monitoring cables

interconnecting the units and racks shall be easily disconnected by plugs or connectors.

Accessibility :

All the termination points shall be easily accessible from front, rear or top'

AC and DC terminals shall be separated by physical barriers to ensure safety'

All the terminals except AC earth shall be electrically isolated'

Terminations : The Input & output AC terminals for single phase systems shall be clearly

marked as L and N and for three phase systems as R, Y, B & N and Input DC terminals as

+ve & -ve respectively.

3.1,1

3,1.2

3.1.3

3.1.4

3.1.5

3.1.6

3.1.7

3.1.9

3.1.9.1

3.1.9.2

3.r.9.3

3,1.10

3.1.8

1 3 l P a g e/^l .-afuKfr1 ^ "^^tW

3.1.10.1

3.1.10.1.1

3.1.10.1.2

3.1.10.1.3

3.1.10.1.4

3.1.10.2

3.1.10.2.1

3.1.r0.2.2

3.1.10.2.3

3.r.10.2.4

3.1.11

3.1.11.1

3.1.1r.2

3.2

J .J

3.3.r

3.4

AC Termination:

AC termination shall be suitably protected against the accidental touch/contact with the

working staff for their protection and shatt also have clear and prominent "DANGER"Marking.Screening shall be provided between AC & DC components to prevent accident'

All the connections between DSCA unit and individual units shall be tfuough proper rated

cables only.

Fuses & Circuit-breakers provided shall be easily accessible and properly rated'

DC Terminations :

All the connection between the individual units and DSCA unit shall be thlough a proper

rated lugged and cables onlY.

All the AC, DC and Control, alarm cabling shall be supplied with the system'

All conductors shall be properly rated to prevent excessive heating'

DC output ofthe Rectifier unit & input to the Inverter unit shall.be through proper rated hot

plug-in connectors on the unit and lugged termination on the termination end'

Mounting ofComponent & Layout :

Component mounting and fixing methods shall be secured'

Suitable mechanical structure/arrangement for holding units in position shall be provided so

that the unit is held firmly by sliding through it.

Bus-bars: Tinned bus-bars or tinned High conductivity electrollic copper strips with purity

of99.90% (min.) as per 815-613 latest issue shall be able to withstand maximum load current.

The bus-bais shall be capable of carrying current density of 2 Amp/mmz and size shall not be

less than 25mmX5mm in any case. Nuti & golts shall be of stainless steel along with tinned

copper washers. The tinning shall be in compliance ofIS 1359 : 1992 & its thickness shall be

10 pm(minimum).

Cables & wiring: All insulated conductors except those within the confines of aprinted circuit board assembly, shall be ofthe rating enough to withstand the maximum

cunent and voltage during fault and overload. All the wires and cables used shall be fire

retardant as per IS1554 with amendment I (June 94). All the cables & wires used shall also be

Rodent & reptiles repellent.

All wiring shall be neatly secured in position and adequately supported' Where wires pass

through aiy part of metal panel or cover the hole through which they pass shall be suitably

bushed.

Earthing: Proper Ea.rth terminal ( two in each rack ), with effective electrical contact

with frameworh shall be provided. All metal parts of the componentsJ which do not_carry

cunent, shall be bonded thereto. Nominal cross-sectional area of earth continuity conductor(coppei only), not contained within the cable, shall be half (minimum) of each cunent

canying conductor to be protected but in no case it shall be less than 3 mm diameter. Suitable

-,*0-

1 4 l P a g e ^NKl'

3.5

terminals shall be provided for terminating ea(h conductor. Continuity conductor.used for

purpose shall only be of copper. Suitable ierminals shall be provided for terminating earth

"ondu"to.. The manufacturei ihall clearly speci! the earthing requirements for trouble-free

performance ofthe UPS system.

Documentation: Technical literature in English and Hindi with complete layout, detailed

block schematic and circuit diagrams of its assemblies with test voltages at different testpoints ofthe units shall be providid. A soft copy as well as a hard copy ofthe above shall also

te provided. All aspects oi installation, operation, maintenance, trouble shooting and repair

shil be covered in ihis manual. The manual shall also include the following :

Installation, Operation and Maintenance manual part shall include :Safety measures to be observed in handling ofthe equipment.Precautions at the time ofinstallation, operation and maintenance'Required Test Jigs and fixtures.Procedures for routine maintenance, preventive maintenance, trouble shooting and

replacemenlv) Illustration of intemal and extemal mechanical parts.

vij Complete layout, detailed block schematic and circuit diagrams of its assemblies with test

voltages at different test pointsvii) circuit description and working of UPS System (Inverter, Rectifier, DSCA units, Static

Transfer Switch and vR unit) ai various stages stadng from AC input to Rectifier to the

AC output with Block Schematic.viii) Circuit description & working of DSCA.ix) A Table giving details of sizeldimension of maintenance of cables & Bus-bar used in the

design.x) Earthing Guide lines for the UPS system as per BIS Specifrcation'xi) Test method for testing each and every parameter of the unit and whole system'

b) Repair manual :i) List ofreplaceable parts used with the source ofprocurement'iil Detailed ordering information for all replaceable parts for ordering of spares as and when

reouired.iii) hlcedure with flowchart for trouble shooting and sub-assembly replacement'ivjTest Instruments, Test fixtures, accessories and tools required for maintenance and repair.

vj Systematic trouble shooting charts (fault tree) for probable faults and their remedial action.

vi) Address and telephone numbers ofMainlenance centre.

Hard copy of the documentation shall be prepared using good quality paper with clear 1ndcrisp printing. All the drawings in clear printing shall be attached to the hand-book binding.fhe Uinaing of the manual shall be long lasting and presentable. One set of flow chart

drawings neiessary for trouble-shooting shall be provided with lamination, with each manual.

Quality Requirenents

Components : The component parts of the equipment shall be of professiorral gade of

reputid manufacturer to ensure prompt and continuous service and delivery of spare parts.

Uie ofpotentiometer is precluded. The listed CACT components only shall be used'

Power Transformers and chokes: Power transformers and chokes shall use class B orhigher grade of insulation. These shall be wound with copper wire and adequate insulationshall be provided.

a)DiDiiDiv)

3.5.1

3.6

3.6.r

3.6.1.1

1 5 l P a g et'flF,,1eru

"r{\^-

3.6.1.2

3.7

3.8

Fuses or circuit breakers shall be provided wherever appropriate to protect against

failure of control/sensing circuit' Fuses shall conform to BIS specification'

Quality Assurance Tests: Each of the UPS system supplied against the specific order after

type approval shall be inspected and tested to ensure that the requirements of this document

have been met. These tests shall be carried out by QA wing ofBSNL'

Finish and Painting: The finish of the structure and panels shall conform to the latest issue

ofIS 101 & IS 168. The structure and panels shall only be powdered coated. The thickness of

powder coating shall be between 50 to 70 micrometers. The Colour used shall conform to IS 5

latest issue. Colour scheme shall be as follows :Outside except ftont panel - Satin Blue, No. 177.Inside and front panei. - Shall harmoniously match the outside Colour'

ups flnverter & Rectifier units) units - Shall harmoniously match with rack colour.

Marking & Labeling :

It shall be possible to locate each component on the PcB by the layout & circuit drawing. _Allterminals shall be properly sign-written and all components properly labeled to enable their

identification with ieferente to the supplier's Installation operation, maintenance manual and

repair manuals. Designation of keys, switches ald 9th9r components mounted on the

front/inside panel and tieir operating positions shall be clearly engraved or sign- written' 'The

wiring shall be clearly and p"*-"-ntly identified with the designation or colour code which

correi'ponds to the equipmint circuit diagram. Where non-standard colours are used cable

functions shall be clearly & permanently labelled at both ends'

Fuse holder identification shall include details of fuse rating and type. In case of fuses on PCB

the rating shall be either on fuse or PCB at the base ofthe fuse'

A screen printed, circuit & cabling diagram shall be placed in side of the front door or any

other convenient place for ready reference ofthe maintenance staff'

Danger Label : Each unit shall have a screen printed "Danger" label duly fixed in

prorn'inent place with RED characters against WHITE background'

Name plate : A name plate, anodised or screen printed, shall be suitably fixed on each

rack/unit and contain following information :l. GR Number :2. TACNo. :3. Type ofthe Unit :4. Manufacturer's name and identification :5. Model No. :6. Unit Serial No. :7. Input voltage :8. Output Voltage & rating :9. Year of manufacture :

on the front top of the Rack, an etched engraved or anodised designation plate in BoLD

letters showing isystem Configuration & the rating ofthe system" shall be provided.

MTTR & MTBF:

MTTR:Themeantimetorepair/replaceafaultyunitshallbelessthan20minutes.

3.9

3.9.1

3.9.2

3.9.3

3.9.4

3.9.5

3.9,5.1

3.10

3.10.1

1 6 l P a g e

f--- .-fuiv-/W

3.10.2

3.11

MTBF (Mean fime Between Failures): MTBF of the system shall not be less than 100'000

houn. Tile MTBF for fans shall be better than 70,000 hours at 40 degree C. The concurence

of cACT of QA wing of BSNL in this regard is mandatory. The MTBF shall be verified as

per QM-115. MTBF, predicted and observed values shall be fumished along withcalculations by the manufacturer. Based on these figures tlree years maintenance spares shallbe specified by the equipment supplier. The equipment availability shall exceed 99 '9/o'

Fietd Observations: For new products field observation will be carried out for the first

5 systems procured by the departmen! to assess the performance ofthe equipment for aperiod nof exceeding 6 months from the date of commissioning. The manufacturer shall

undertake to repair/replace the system without any financial obligation to the user, in case theperformance oi the system is not found satisfactory during the period of observation. User

.hull ulro provide the feed-back to BSNL HQ, so that necessary improvement may be

incorporated in the GR.

Packing: Packing shall be done in accordance with latest guidelines for UPS system, issued

by QA wing of BSNL.3.12

: End of Chapter 3 :

l T l P a g e'64-t1<tn

.-^t-

CHAPTER4

Safety requirements

4,0 Safety requirements

4,1 Operating personnel safety requirements

4,1.1 The operating personnel shall be protected against shock hazards as per IS 8437 {1993\ -

"Guide on the effects of current passing through the human body" [equivalent to IECpublication 60479-1 (1984). The Manufacturer/supplier shall submit a ceftiflcate in

respect of compliance to these requirements.

4.1.2 The equipment shall conform to IS-13252 {2003} - "safety of informatior t9th"9]9ry

equipment including elechical business equipment" [equivalent to IEC_publication 60950

1ZbOil ana IS 10417 {1986} ,.Safety requirements of radio transmitting equipments"

iequivalent to IEC 602151. The Manufacturer/supplier shall submit a certificate in respect

of compliance to these requiremenls.

4.1.3 The equipment shall follow proper construction practice to minimize unintended radiation

due to'leakage from any gap or monitoring points. All unused ports and monitoring points

should be terminated. TG power flux density shall not exceed 1 mwcm2 at a distance of

2.5 cms.

4,1.4 protection against short circuiVopen circuit in the accessible points shall be provided. All

switches/controls on front panel shatl have suitable safeguards against accidentaloDerations.

: End of Chapter 4 :

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