111_11 Kv VCBs1250A Sep.2012 (Manual)

7/29/2019 111_11 Kv VCBs1250A Sep.2012 (Manual)

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HARYANA VIDYUT PRASARAN NIGAM LIMITED

SPECIFICATION No.: HGD/S- 41/R-4(B)/DGM-89

TECHNICAL SPECIFICATION

FOR

11 kV, 12 PANEL BOARDVACUUM TYPE SWITCHGEAR (1250A)

(FOR MANUALLY OPERATED CAPACITOR BANK)

CHIEF ENGINEER/MM,HVPNL, PANCHKULA

SEPTEMBER- 2012


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TECHNICAL SPECIFICATION FOR 11 kV SWITCHGEAR PANELSVACUUM TYPE (1250A)

1.0 SCOPE:

This specification covers the design, manufacture, assembly, testing at

manufacturer's works before despatch, supply and delivery F.O.R. destinationas per schedule of requirement (Annexure 'I') of Vacuum Type, 12 Panel 11 kVSwitch boards having normal current rating of 1250 Amps. with rupturingcapacity of 350 MVA.

2.0 STANDARDS:2.1 The circuit breakers shall conform to the latest revisions with amendments

available at the time of testing of relevant standards, rules and codes, some ofwhich are listed herein for ready reference.

Sr.No. STANDARD TITLE

1 IEC-56 Specification for alternating current circuit breakers

2 IS-5578 & 11333 Making and arrangement for switch gear bus-barmain connection and auxiliary wiring.

3 IS- 2147 Degree of protection provide for enclosures for lowvoltage switch gear.

4 IS- 13118 Specification for circuit breakers.

5 IS- 3427 Disconnectors of circuit breaker & their interlocking .

6 IS-2099 High voltage porcelain bushings.

2.2 Equipment meeting with the requirement of any other authoritative standards,which ensure equal or better quality than the standard mentioned above shallalso be acceptable. if the equipment offered by the bidders conforms to anyother standards , salient points of difference between the standards adoptedand the specific standards shall be clearly brought out in relevant schedule .Four copies of such standards with authentic English Translations shall befurnished alongwith the offer.

3.0 CLIMATIC CONDITIONS:

The equipment is required to operate satisfactorily under the following siteconditions:

3.1 Max. temperature 500C3.2 Min. Temperature -2.50C3.3 Max. relative humidity 100%3.4 Min. relative humidity 26%3.5 Average number of rainy days per Nearly 120 days

annum.3.6 Average annual rainfall 900mm3.7 Average number of dust storm days 35

per annum.


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3.8 Isoceraunic level 453.9 Max. wind pressure 195 kg/Sq.mt.3.10 Altitude above mean sea level Less than 1000

mts.3.11 AUXILIARY POWER SUPPLY:

Auxiliary electrical equipment shall be suitable for operation on thefollowing supply system.

a. Power devices 415 V, 3 phase 4 wire 50 Hz , neutral (likedrive motors ) grounded AC supply .

b DC alarm, control andprotective devices i) 220 V DC, underground 2 wire for 220kV

132kV &66 kV Sub-Station.c lighting 240 V, single phase ,50 Hz AC supply.

4.0 TYPE & RATING:

The panels 11 kV switchgear panels shall comprise of 11 kV Vacuum Typecircuit breakers, instrument panels and instrument transformers etc. suitablefor indoor use. The equipment shall be totally enclosed in a metal cladcubicle, dust and vermin proof with necessary isolation arrangement. Eachpanel shall be easily extensible on either side and should be complete withnecessary internal copper connections, small wiring, L.T. fuses andsupporting frame work with bolts to secure it to the floor. The maximumpermissible width of each panel should not be greater than 710mm. TheCircuit Breakers shall be draw out type in horizontal position and horizontal

isolation.

Principal parameters

The breakers shall have the following ratings:4.1 Type Vacuum

4.2 No of poles 3

4.3 Nominal system voltage 11 kV

4.4 Highest system voltage 12 kV

4.5 Rated frequency 50 +/- 1.5 Hz

4.6 Rated continuous current 1250 Amp for incoming & 400 Amprating at an ambient for outgoing feeders.temp. as specified inIS : 13118-1991(Latest edition)

4.7 Symmetrical breaking 350 MVA

capacity


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4.8 Impulse withstand test 75 kV (Peak)

voltage

4.9 One minute power 28 kV (rms)frequency withstand

test voltage

4.10 Short time current Not less than 18.4 kA current ratingcorresponding to 350 MVA for 1 sec.

4.11 System neutral Solidly earthed.

5.0 GENERAL DESIGN OF SWITCHGEAR PANELS:

5.1 OPERATING MECHANISM:

The vacuum type circuit breaker shall be draw out type & trip free. The VCBsshall be suitable for operation from 220 V DC auxiliary supply. The operatingmechanism shall be motor operated spring charged type. There shall beprovision(s) for manual charging of closing spring and emergency hand trip.The motor used for the purpose will be suitable for 240 V AC as well as for220 V DC . The operating mechanism shall work satisfactorily at 85 % - 110% of rated supply voltage. The VCB shall have 2 normally open & 2normally-closed auxiliary contacts over & above the ones required forvarious control & supervision circuits.

5.2 INSTRUMENT PANELS:

Each unit shall have its own instrument panel provided at the top & completewith small wiring connections from relays, instrument transformers, meteringinstruments, indicating instruments, selector switches & circuit breakercontrol switch.

All wiring shall be carried out by using stranded single annealed copperconductor insulated with poly vinyl chloride insulation suitable for 650 Vservice and in accordance with IS:732-1963. CT/PT circuit shall use wire ofnot less than 4.0 mm2 cross-sectional area whereascontrol/alarm/supervision circuit shall use wire of not less than 2.5 mm2

cross-sectional area. All wires will be continuous from one terminal to theother and, also will have no Tee-junction enroute. The connections shall besecurely made with the help of connecting lugs duly crimped on to thecopper conductor.

The meters and relays shall be mounted in a convenient position so as to bereadily accessible for inspection or repair. The terminal board provided in theinstrument panel of VCBs will be made of moulded dielectric having brassstuds, washers, holding nuts & locking nuts. All holding nuts shall be securedby locking nuts. The connection studs shall project 6 mm from the lock nutsurface. NO OTHER TYPE OF TERMINAL BOARD IS ACCEPTABLE.


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The panels shall have a degree of protection of IP-4x. The leads frommetering CTs shall be directly terminated at TTB & there from at the KWHmeter/SEM with a provision to seal TTB and KWH meter/SEM. The said CT

leads will be concealed to prevent their tempering enroute. Similarly PTleads from secondary box of the PT to TTB & there from to energy meterincluding inter panel PT leads will also be concealed to prevent theirtempering. The mode & extent of concealing the metering leads of CTs &PTs to prevent their tempering (by unscrupulous operating personnel) will bediscussed & mutually agreed upon with the successful bidder(s). TTB usedon the instrument panel should be suitable for front connections.

Earthing of current free metallic parts or metallic bodies of therelays/switches mounted on the instrument panel and metal enclosed

switchgear shall be done by a suitably sized copper conductor. Earth busmade of 25x3 mm bare copper flat will be extended through entire length of11 kV switch-board with suitable provision to connect it to the sub-stationearth at the extremities. The earthing arrangement will meet with therequirements laid down in IS : 3427 read with its latest amendment.

5.3 VACUUM INTERRUPTER:The Vacuum interrupter of 12 kV minimum 25 kA short time current rating,2000 Amp. normal current rating capable of withstanding minimum 100 fullshort circuit operations as per test duty 1 to 5 of IEC-56. VacuumInterrupters for incomers as well as outgoing shall be of same type. These

vacuum interrupters shall be of approved make only.

5.4 INSTRUMENT TRANSFORMER:The secondary voltage & current rating of the instrument transformers shallmatch with the metering or protective equipment. The CTs shall have ratio &accuracy class as mentioned in the schedule of requirement. The CTs shallbe wound/ring type in accordance with their ratings. The terminal boardsassociated with differential CTs, REF CTs & over current / earth faultprotection CTs will be of disconnecting type having short circuiting facility &thus facilitate secondary testing of concerned protective relay withoutdisturbing the associated small wiring. Inter- changeability of housing of CTs

from one panel to another must be ensured.

A resin cast potential transformers shall be provided on the Incoming side ofeach panel set & shall be star/star connected as per attached Schedule ofRequirement Annexure-B.

The neutral point of star connected secondary windings of instrumenttransformers shall be earthed to the main earth bus referred to in theconcluding paragraph of clause 5.2. Multiple earthing of any instrumenttransformers shall be avoided.


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5.5 BUS - BARS:

All the panels shall be provided with one set of 3 phase 1250 Amps. heatshrunk PVC sleeves insulated Main electrolytic copper bus bars for all

switchboards and shall be connected in a separate moisture and verminproof sheet metal chamber. The cross sectional area of bus bar shouldhowever not be less than 1200 mm2 per phase. The bus-bars connections &insulator supports shall be mechanically strung & rigidly supported so as towithstand the stresses generated by vibrations, variations in temperatureand due to severe short circuits.

The bus bars shall be heat shrunk PVC sleeves insulated type andsupported on insulators at short intervals keeping adequate clearance as perIE rules between bus bars and earth. The bus bar chamber shall be provided

with inspection covers with gaskets & bus bar shutters. Provision shall bemade for future extension of bus bar & switch board.

5.6 LIMIT OF TEMPERATURE RISE:

The temperature rise of the current carrying parts shall not exceed thepermissible limits above the ambient temperature as per relevant standards(latest edition). However, the reference maximum ambient temperature maybe taken as 500C.

5.7 BUSHING INSULATORS:

These shall comply with the latest issue of IS : 2099 in all respects.

5.8 DISCONNECTORS OF CIRCUIT BREAKER & THEIR INTERLOCKS

All disconnectors (isolators) of the 11 kV VCBs & interlocks betweendifferent pieces of apparatus provided for reasons of safety & forconvenience of operation of switchgear shall meet with the requirement of IS: 3427-1969 read with its latest amendment. Efficient mechanical interlockingshall be provided to meet the following conditionsi) It shall be possible to insert/withdraw the breaker only after circuit

breaker has been opened.

ii) It shall be possible to insert/withdraw the breaker only when it is fullyopen position as well as it is in Isolated/test position.

iii) It shall not be possible to remove the breaker until the moveable plugunit having secondary connections has been withdrawn.

iv) It shall not be possible to replace in position moveable plug unitunless the circuit breaker has been racked in.

v) Provision of shutters or locks shall be made to prevent access to busbar chambers and receptacles when the circuit breaker is withdrawn.

vi) Provision shall be made for locking the circuit breaker closingmechanism in open position.


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Circuit breaker `close' & òpen' lamps will be wired so as to be on 240 V ACunder `normal' condition. These lamps will be switched over to 220 V DCautomatically in the event of failure of 240 V AC supply. Each of 11 kV(incoming) instrument panel will be equipped with a suitable relay for thepurpose.

5.11 ALARM SCHEME:

5.11.1 NON TRIP ALARM SCHEME:

Each of 11 kV (incoming) panel will be provided with a non-trip alarmscheme comprising suitable auxiliary relay (rated for 220 V DC), accept pushbutton, reset push button & a buzzer. It will cater to non-trip condition suchas trip circuit faulty & PT secondary fuses blow òff'. The non-trip alarmscheme will meet with the following requirements:-

i) The closing of an initiating contact shall actuate a buzzer and will beaccompanied by a flag indication on the concerned auxiliary relay.

ii) The closing of an initiating contact shall glow a lamp which will notreset until the fault has cleared.

iii) It shall be possible to silence the buzzer by pressing àccept' pushbutton. If after cancelling the alarm but before resetting the visualsignal, the same fault persists the buzzer shall be suppressed.

iv) If after canceling the alarm but before resetting visual signal someother fault takes place, the alarm accompanied by flag indication onappropriate auxiliary relay shall take place.

v) If after canceling the alarm and after resetting the visual signal, thesame fault appears or some other fault take place, the alarm, flagindication and non-trip lamp indication shall reappear as usual.

vi) The non-trip alarm acceptance shall be by means of a push buttonand resetting of visual signal may also preferably be done through apush button.

vii) Means shall be provided for test checking the lamp and alarm circuitat frequent intervals.

viii) The equipment shall be suitable for 220 Volts DC operation.

5.11.2. TRIP ALARM SCHEME:Trip commands due to operation of protective relay on any of 11 kV VCBconstituting the switchboard will trip the concerned VCB. Its auxiliary contactwill actuate a bell (provided in each of the 11 kV


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incoming VCB) & willbe cancelled by the associated circuit breaker controlhandle. Auto trip lamp will glow on the concerned 11 kV VCB & there will beflag indication on the concerned protective relay.

5.12 PT FUSE FAIL ALARM SCHEME:

Each of the 11 kV (incoming) instrument panel is to be provided with a relayto monitor the fuses on the secondary side of 11 kV metering PT. The failureof any of secondary fuse on the 11 kV PT will be accompanied by visual &audio indication in accordance with clause 5.10.1 of the specification. Noneof the 11 kV outgoing/capacitor/Stn. VCB will be provided with fuses &inter-circuit PT leads may run from one bus wire board to the other.

5.13. METERING SCHEME:

5.13.1 Each of the 11 kV VCB will be provided with a suitably sealed ammeter

(additional dials, if any, required to cover all the taps of the CTs shall beincluded at the time of bidding) with a selector switch facilitatingmeasurement of phase currents as well as unbalance current. The coil ofammeter shall be rated for 5 Amp. The instrument shall be of moving ironspring controlled type of industrial grade `A' classification having accuracyclass 1.0 & shall conform to IS:1248(1968).

5.13.2 Each of the 11 kV (incoming) VCB will be provided with a suitably sealedvoltmeter with a selector switch. The selector switch shall facilitate themeasurement of phase to phase & phase to neutral voltage of all the threephases one by one. The coil of the voltmeter shall be rated for 110 V (phase

to phase). The instrument shall be of moving iron spring controlled type ofindustrial grade `A' classification with accuracy class 1.0 & shall conform toIS:1248(1968).

5.13.3 Each of the 11 kV VCB except the 11 kV capacitor VCB & Incomer VCBs willbe equipped with a three-phase four-wire Electronic KWH meter/SEM. The

KWH meter shall be rated for 5 A CT secondary and 110 V/3 (phase toneutral) available from 11 kV PT mounted on each of the incoming VCB. Theinstrument shall be having accuracy class 1.0 and digital LED display only.

5.13.4 Each of the 11 kV (incoming) VCB will be provided with a power factor

meter. The PF meter having a range of 0.5Lag - one - 0.5lead shall be of 2element type suitable for use on three phase three wire unbalanced system.It shall be rated for 5 A CT secondary & 110 V (phase to phase) availablefrom 11 kV PT mounted on each of the 11 kV incoming VCB. The instrumentshall be iron-cored dynamometer type having accuracy class 1.0.

N.B. Routine test certificates of all the indicating & integrating instruments will besubmitted alongwith the routine test certificates of 11 kV switchgear.


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5.14 CONTROL SCHEME :

5.14.1 The instrument panel of each of the 11 kV VCB will be equipped with acircuit breaker control handle of pistol grip type with spring return to neutralposition and having bell alarm cancellation contacts. The control handle shall

be so designed that after being operated to `close' a VCB the operation cannot be repeated until the control handle has been turned to `trip' positionmaking it impossible to perform two closing operation consecutively.

5.14 .2 The rating of the control handle shall be suitable for the duty imposed by theclosing and opening mechanism of VCB. The moving and fixed contactsshall be of such a shape & material to ensure good contact and long lifeunder service operating duty. All contacts shall be readily renewable.

5.14.3 The number of contacts in the control handle will be decided by the bidderkeeping in view the requirements of this specification. Two pairs of contactsshall be kept spare. The total number of contacts proposed to be providedshall be stated in the bid.

5.14.4 Safety against inadvertent operation due to light touch on the control handleshall be ensured.

5.15 PROTECTION SCHEME:

5.15.1 FOR INCOMING PANELS:

The back up protection shall be in the form of a combined over current andearth fault relay(two over current and one earth fault). The relay shall behoused in draw out flush mounting case. This shall be triple pole havingInverse Definite Minimum Time (IDMT) characteristics with a 3/10 timecurrent curve i.e. the relay operating time shall be 3 second at 10 times theplug setting at TMS 1. The outer element of the relay shall be arranged for

over current protection and shall have a setting range of 50-200 % of 5 A(The relay for station transformer shall have a setting range of 20-80 % of 5A) and adjustable in suitable equal steps by means of a plug board. Thecentral element shall be used for earth fault protection with a setting range of20-80 % of 5 A adjustable in suitable equal steps by means of a plug board(for station transformer panels, the setting range shall be 10-40% of 5 A )Each of the three elements shall be fitted with shunt reinforcing unit withhand reset operation indicator.


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5.15.2 FOR OUTGOING FEEDERS PANELS:

Each outgoing feeder panel shall be provided with a triple pole IDMTL typecombined over current and earth fault relay (two over current and one earth

fault element) conforming to the technical specification stated in the clause:5.15.1 above and one set of triple pole instantaneous relay (high setelement) in the form of two over current and one earth fault element.

The outer element of the relay shall be arranged for over current protectionand shall have a setting range of 500-2000 % of 5 A (The relay for stationtransformer shall have a setting range of 200-800 % of 5 A) and adjustablein suitable steps.

The central element shall be used for earth fault protection with a setting

range of 200-800 % of 5 A (The relay for station transformer shall havesetting range of 100-400 % of 5 A) adjustable in suitable steps.

The relay shall have low transient over reach with a high pick-up/ drop ofratio. The relay will be connected in series with the triple pole combinedover-current and earth fault relay referred to above and shall be so wired soas to take this (instantaneous) out, if so desired by the purchaser at any timeduring operation of the equipment.

5.15.3 FOR CAPACITOR PANEL:

Each capacitor panel shall be provided with the following relays forprotection of capacitor banks: -

i) Triple pole non-directional IDMTL type combined over current & earthfault relay (two over current & one earth fault element) conforming tothe technical specification stated in clause 5.15.1 above.

ii) 1 no. inverse time over voltage relay with setting range 100 % to 130% of 110 V available from 11 kV PT mounted in the 11 kV (incoming)VCB alongwith auxiliary transformers(for external mounting) of ratio110/103.5 to 116.5 V ( in steps of one volt) to be used forcompensating the error of over voltage relay.

iii) 1 no. inverse time under voltage relay with setting range of 50 % to 90% of 110 V (phase to phase connections).

iv) 2 no. neutral displacement relay with settings 5.4, 7.5, 12.5 & 20 voltsand to be fed from open delta winding of three phase(11000//3/(110//3) Volts. Residual voltage transformer (Residualvoltage transformer is not a part of this specification). The biddersoffering relays with different settings than above shall technicallyjustify their offer.

v) 5 minute timer to ensure that the capacitor bank is fully dischargedonce it has been switched "OFF" before it can be switched "ON"again.


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5.15.4 COMMUNICATION COMPATIBILTY OF RELAYS

All relays shall conform to the requirements of IS:3231/IEC-60255/IEC 61000or other applicable standards. Relays shall be suitable for flush or semi-flushmounting on the front with connections from the rear. All protective relays

shall be in draw out or plug-in type modular cases with proper testingfacilities. Necessary test plugs/test handles shall be supplied loose and shallbe included in contractors scope of supply.All main protective relays (viz over current and earth fault, Over voltage andneutral displacement) shall be numerical type and communication protocolshall be as per IEC 61850. Further, the test levels of EMI as indicated in IEC61850 shall be applicable to these.For numerical relays, the scope shall include the following:

a) Necessary software and hardware to up/down load the data to/from therelay from/to personal computer installed in the substation. However, the

supply of PC is not covered under this clause.b) The relay shall have suitable communication facility for future connectivity toSCADA. The relay shall be capable of supporting IEC 61850 protocol (withoptical port).

N.B. The relay shall be suitable for 220 V DC auxiliary supply. The relay cover &case shall be dust proof, water proof & vermin proof. Operating indicatorsshall be provided on all protective relays/ on their immediate auxiliary unitsto indicate the type of fault & phase / phases involved. It shall bepossible to reset the operation indication without opening the relay case.The routine test certificates of all protective & auxiliary relays will be

submitted alongwith routine test certificates of 11 kV switchgear covered bythe specification.

5.16 D.C. FAIL ALARM SCHEME:

A suitable relay for monitoring the DC supply to the 11 kV switchboard shallbe mounted on each of the 11 kV incoming instrument panel. The operationof DC fail scheme shall be accompanied by visual (indicating lamp on theinstrument panel) & audio (ringing of hooter) annunciation. It shall bepossible to silence the hooter by pressing the accept' push button while thelamp shall continue to glow till the fault has been attended to & DC supply

restored. A DC fail `Test' push button may be provided to test the lampcircuit of the scheme.

6 TESTAll routine tests shall be carried out in accordance with IS : 13118-1991(latest edition thereof).

6.1 TYPE TESTSThe equipment offered should be type tested. Type test report should not bemore than seven years old, reckoned from the date of bid opening, inrespect of the following tests, carried out in accordance with ISS-13118/IEC-

56, from Govt./Govt. approved test house, shall be submitted along with bid:


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i) Impulse with-stand voltage tests.

ii) Power frequency voltage dry & wet tests on main circuits.

iii) Short circuit with stand capability tests.

iv) Mechanical endurance tests.

v) Temperature rise test.

However Mechanical endurance tests and Temperature rise test conductedat Firms works in the presence of representative of any of the SEBs/StatePower Utilities shall also be acceptable.

The remaining type test report as per clause 6.0 of ISS-13118/IEC-56 shallbe submitted by the successful bidder with in three month from the date ofplacement of Purchase Order. These type test reports will also be from

Govt./ Govt. approved test house & shall not be more than seven years oldreckoned from the date of placement of order.

Voltage transformers & current transformers shall comply with the type testsas stipulated in the latest version of IS : 3156 & IS: 2705 respectively. Thereports of all type tests conducted shall be supplied. The 11 kV VCB &associated CTs & PTs shall be subjected to routine tests as specified in thelatest version of the relevant ISS in the presence of purchaser'srepresentative, if so desired by the purchaser. The routine test certificates ofbought out components such as relays, switches, indicating instruments,

KWH Meter & SEM will also be presented to HVPNL's inspecting officer whowill forward them to the purchaser alongwith his inspection report for themain equipment. All test reports should be got approved from the purchaserbefore despatch of equipment.

7.0 DRAWINGS:

In addition to any other drawing which the tenderer may like to furnish toexplain the merits of his proposal, following drawings shall be submitted withthe tender in quadruplicate:

i Principal dimensional details of 11 kV Switchgear.

ii General arrangement of 12/14 Panel 11kV switchboard including itsfoundation details.

iii Schematic drawings of control, metering & protection circuits inrespect of 11kV incoming VCB, 11kV outgoing VCB including stationtransformer VCB & 11 kV capacitor VCB alongwith detailed write-up.

iv Drawing showing height of 11 kV bus bars & arrangement of bus bars

v Vacuum interrupter drawing.


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Four copies of the descriptive literature in respect of 11 kV switchgear, relays,KWH meters, SEM, voltmeters, ammeters, selector switches etc. proposed to beused shall also be supplied.

The bidder shall submit four sets of final version of all the above drawings forPurchaser's approval alongwith the tender in a separate seal cover. These

drawings will be opened in the event of order. The Purchaser shallcommunicate his comments/approval on the drawings to the Supplier within fourweeks of the issue of LOI. The supplier shall, if necessary, modify the drawings& resubmit four copies of the modified drawings for purchaser's approval withintwo weeks from the date of receipt of purchaser's comments. The modifieddrawings will be approved within 15 days of their receipt by the purchaser. Afterreceipt of purchaser's approval to drawings, a set of reproducibles of approveddrawings & five sets of all the approved drawings and operating manualscontaining, erection, operation & maintenance instructions per 11 kVswitchboard shall be supplied to CE/MM, Shakti Bhawan, Sector-6, HVPNL,

Panchkula for use by various agencies of the purchaser. However, one set ofdrawings and operating manual will be despatched alongwith each 11 kV switchboard. The 11 kV switchgear will not be fabricated without getting the drawingsapproved from the purchaser.

In order to ensure timely receipt of all the drawings, literature & reproduciblesetc., the purchase section of D&P organisation will issue despatch instruction fordespatch of 11 kV switchgear.

8.0 SPECIAL TOOLS:

The tenderer shall separately quote for a set of special tools, if so required, forerection and maintenance of the switchgear panels.

9.0 DEVIATION FROM SPECIFICATION:

Should the tenderer wish to deviate from the provisions of the specificationeither on account of manufacturing practice, or any other reasons, he shall drawattention to the proposed point of deviation in the tender and submit such fullinformation drawing and specification so that merits of his proposal may be fullyunderstood. The specification shall be held binding unless the deviation havebeen fully recorded as required above.

10.0 TRAINING FACILITIES: VOID

11.0 GUARANTEED AND OTHER TECHNICAL PARTICULARS:

These particulars shall be furnished strictly as per Annexure-A. Anydeviation from this specification shall be clearly brought out separately.


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ANNEXURE-'A'

SCHEDULE OF GUARANTEED AND OTHER TECHNICAL PARTICULARS

1. Maker's name & country of manufacturer.2. Type

3. Nominal system voltage4. Highest system voltage5. Frequency6. Normal current ratings

a) As ref. ambient temp.as per relevant standard.

b) At site conditions.

7. Symmetrical breaking capacity.

8. Asymmetrical breaking capacity

9. a) Symmetrical breaking currentb) Short time current rating for 1 sec.

10. Making capacity.

11. 1.2/50 Micro second impulse wave withstand test voltage.

12. One minute power frequency withstand test voltage.

13. No. of poles

14. No. of breaks in circuit per pole.

15. Length of break per phase.

16. Opening time

17. Making time

18. Arc duration

19. a) Type and material and main contactsb) Material & thickness of plating of contacts.

20. Type of arcing contacts and/or arc control device.21. a) Whether the circuit breaker is trip free ?

b) Whether it is with lock out preventing closing ?

22. Nominal voltage of closing mechanism.

23. Power required to close circuit breaker at nominal voltage.

24. Minimum clearance in aira) Between phases.

b) Between the live parts and earth


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25. Minimum clearance in vacuum

a) Between phasesb) Between live parts & earth

26. Total weight of complete breaker

27 Dimensions and mounting details

28. Standard to which conforms

29. Details of reference drawings attached.

B. INSTRUMENT TRANSFORMERS:

i) CURRENT TRANSFORMERS :

a) Name of manufacturer.

b) Rated primary current

c) Rated secondary current

d) Rated transformation ratio

e) V.A. oputput at rated current & accuracy

f) Class of accuracy.

g) Rated over current factor with time in seconds.

h) Type of CTs(whether wound or bar type)

i) One minute power frequency withstand test voltage.

j) 1.2/50 micro second impulse withstand voltage.

k) Standard to which conform.

ii ) VOLTAGE TRANSFORMER :(i) Name of manufacturer.

(ii) Rated primary voltage

(iii) Rated secondary voltage

(iv) Rated burden

(v) Class of accuracy

(vi) Rated voltage factor and time

(vii) One minute power frequency withstand test voltage.

(viii) 1.2/50 micro second impulse withstand test voltage.


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ANNEXURE -'B'SCHEDULE OF REQUIREMENT

1. VACUUM TYPE 12 PANELS, 11 kV SWITCH BOARDS AND EACH SWITCHBOARD COMPRISING OF THE FOLLOWING:-

1.01. 1 NO. INCOMING PANEL EQUIPPED AS BELOW:

-1 No. Triple pole 350 MVA, 11 kV 1250A draw out type vacuum circuit breaker fitted witharc control device, interlocks, auxiliary switches isolating contacts, emergency handtrip device, mechanical `ON' & `Off' indicator and motor operated spring chargedmechanism.

-1 Set Bus bars 3 phase 1250A. Cable termination arrangement located at the rear of theunit for receiving 2 set of power cables each comprising 3 no. single core 630 mm 2

11 kV XLPE PVC sheathed cables & complete in all respect. Cable boxes withjointing kits etc. as per clause 5.9 of the specification.

-3 No. CTs of ratio 1200-900/0.577-5 A with first core for differential protection having aminimum knee point voltage equal to 40 RCT (neglecting lead resistance) and the2nd core for REF protection having a minimum knee point voltage of 92(RCT)V on1200 A tap where RCT secondary winding resistance. These CTs shall conform toaccuracy class PS of ISS:2705 (Part-IV) and shall have magnetising current as lowas possible but in no case exceeding the value corresponding to class 5 P ofIS:2705 (Part-III).

-3 No. CTs of 1200-900/5 A of 15 VA output and 5P10 accuracy for over current and earthfault protection & Ampere meter etc.

-3 No. CTs of 1200-900/1 A of 15 VA output, accuracy class 0.2S and ISF less than 5 for

SEM.CT secondary terminals shall be brought out in weather proof sealableterminal box & shall be connected to SEM through TTB. Both TTBs and SEM shallbe sealable type.

-1 No. 3 phase star/star connected resin cast voltage transformer as per IS: 3156(Part-II)1965 complete with HT & LT fuses, isolating plugs and sockets for HT & LTcopper connectors, current limiting resistances as per following specifications:-

Sr.No. Core Ratio VA Burden Accuracy

1. Core-I 11000/3/110/3 100VA 1/3p

2. Core-II 11000/3/110/3 10VA 0.2

CT Secondary terminal of metering core i.e. Core-II shall be brought out in whether

proof terminal box and shall be connected to SEM through TTB. Both TTBs andSEM shall be sealable type.

-1 set Vermin and dust proof fitments.

-1 NO. INSTRUMENT PANEL MOUNTED ON TOP AND EQUIPPED AS BELOW:

-1 No. Ammeter with selector switch as per clause: 5.13.1 of the specification.

-1 No. Voltmeter with selector switch as per clause: 5.13.2 of the specification.

-1 No. PF meter with TTB as per clause: 5.13.4 of the specification.

-1 Set Triple pole combined over current and earth fault IDMTL relay as per clause: 5.15.1of the specification.


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-1 Set Over voltage relay for incomer panels only.

-1 No. Tripping relay with hand reset contacts suitable for 220 V DC auxiliary supply.

-4 No. Indicating lamps with fittings to indicate breaker òpen', `close', àuto trip' & spring

charged as per clause 5.10 of the specification.

-1 No. Automatic trip circuit supervision scheme as per clause 5.10 of the specification.

-1 No. PT fuse alarm scheme as per clause 5.12 of the specification.

-1 No. DC fail alarm scheme as per clause 5.16 of the specification.

-1 No. Circuit breaker control handle as per clause 5.14 of the specification.

-1 No. Alarm equipment for non-trip & trip fault annunciation as per clause 5.11.1 & 5.11.2of the specification.

-1 No. Cubicle illumination lamp with door operated ON/OFF switch.

-1 No. 15 A power socket with switch.

-1 No. Anti-condensation tubular space heater suitable for connection to 240 V AC supplywith a thermostat & a miniature circuit breaker.

- 1 No. Special Energy Meter as per specification attached (Annexure-C).

1.02 8 N0. OUTGOING FEEDER PANELS EACH COMPRISING OF:

-1 No. Triple pole 400 A, 350 MVA 11 kV circuit breaker fitted with Arc control devices,interlock arrangement, auxiliary switches, isolating contacts, emergency hand tripdevice, mechanical ON & OFF indicator & motor operated spring chargedmechanism operate at 220 V DC.

-1 Set Bus bars 3 phase 1250 A.

-3 No. CTs of ratio 300-150/5-5 A with first core of 15 VA output & 5P10 accuracy for O/C& E/F protection & second core 15 VA output & accuracy class 1.0 for metering.

-1 No. Anti-condensation tubular space heater for connection to 240 V AC supply with athermostat & a miniature circuit breaker.

-1 Set Vermin proof & dust proof fitments.

-1 No. Instrument panel mounted on top & equipped as below:--1 No. Ammeter with selector switch as per clause: 5.13.1 of specification.

-1 No. KWH meter with TTB as per clause: 5.13.3 & 5.2 of the specification.

-1 set Triple pole combined 2 O/C & 1 E/F IDMTL relay supplemented with triple poleinstantaneous relay (high set element) in the form of 2 O/C & 1 E/F as per clause :5.14.2 of the specification.

-1 No. Tripping relay with hand reset contacts suitable for 220 V DC auxiliary supply.

-4 No. Indicating lamps with fittings to indicate breaker òpen', `close', àuto-trip' & 'spring

charged' as per clause 5.10 of the specification.


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-1 No. Indicating lamp with fittings & push button switch to indicate trip circuit healthy inpre-close & post-close conditions as per clause: 5.10 of the specification.

-1 No. Circuit breaker control handle as per clause: 5.14 of the specification.

-1 No. Cubicle illumination lamp with door operated ON/OFF switch.

-1 No. 15 A power socket with switch.

-1 No. Anti-condensation tubular heater suitable for connection to 240 V AC supply with athermostat & a miniature circuit breaker.

1.03 1 NO. PANEL FOR CAPACITOR BANK:The capacitor controlling breaker should be suitable to meet all conditions requiredfor capacitor operation & should be suitable for controlling capacitive current upto400 A at 11 kV which is equivalent to 7.5 MVAR approx. & equipped similar to itemNo. 1.02 except KWH meter but with the following changes/additions:

-2 No. Trifurcating main cable box for receiving 3 core XLPE, PVC sheathed cable upto185 mm2 & 300 mm2 size and complete with cable glands and jointing kits etc. as

per clause: 5.9 of the specification.-3 No. CTs of ratio 400-20/5A output & 5P10 accuracy for over current & earth fault

protection.

Protection scheme including closing circuit interlock timer shall be as per clause:5.15.3 of the specification.

1.04 1 NO. STATION TRANSFORMER FEEDER PANEL:

Similar to item No. 1.02 but with the following cable box & CTs:-

-1 No. Trifurcating main cable box for receiving 3 core XLPE cable upto 50 mm2 size &

complete in all respect as per clause: 5.9 of the specification.

-3 No. CTs of ratio 60-30/5-5 A with first core of 15 VA output & class 5P10 accuracy forO/C & E/F protection & second core of 15 VA output & accuracy class 1.0 formetering.

1.05 1 No. INCOMING PANEL EQUIPPED EXACTLY IDENTICAL TO ITEM 1.01 DETAILEDABOVE

NOTE : The two incoming panels at Sr. No. 1.01 & 1.05 shall be placed at the two extremeends of the switch board. Provision shall be made to split the 12 panels boards intotwo parts each having an incoming panel at its end with complete non-trip alarm,

trip alarm & protection schemes.

VACUUM TYPE 8 PANELS, 11 KV SWITCH BOARD AND EACH SWITCH BOARDCOMPRISING OF THE FOLLOWING:-

2.01 2 No. INCOMING PANELS EQUIPPED EXACTLY IDENTICAL TO ITEM 1.01 & shall beplaced at the two extreme ends of the switch board.

2.02 5 No. OUTGOING FEEDER PANELS EQUIPPED EXACTLY IDENTICAL TO ITEM 1.02.2.03 1 No. PANEL FOR CAPACITOR BANK EQUIPPED EXACTLY IDENTICAL TO ITEM

1.03.


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HARYANA VIDYUT PRASARAN NIGAM LTD.

TECHNICAL SPECIFICATIONS

FOR

INTERUTILITY METERING SYSTEM AND

COMMON METER READING INSTRUMENT

(CMRI)

SPEC. NO. HPD/S-59R/HPM-461/Vol-II/PROT. (JULY-2010)

Chief Engineer/MM

Design Directorate, HVPNL,

Shakti Bhawan, Sec-6,

Panchkula-134109

(HARYANA).

Tel/Fax No. 0172-2583724


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TECHNICAL SPECIFICATION FOR INTERUTILITY METERING SYSTEM

1.0 The specification covers the design, manufacturing, testing, inspection, delivery of interutility

metering system and /or common meter reading instrument (CMRI).

2.0 The energy meters specified herein shall be used for tariff metering for bulk, Inter -utili ty power flows in HVPNL/DISCOM. The meters shall be installed on each circuitas a self contained device for measurement of active energy & reactive energy ineach successive 15-minute block and certain other functions as described in thefollowing paragraphs.

3.0 The meters shall be suitable for being connected through Test terminal blocks to thevoltage transformer having a rated secondary line to line voltage of 110 V, and to currenttransformers having a rated secondary current of 1 A. Any furthertransformer/transducers required for their functioning shall be in built in the meters.Necessary isolation and / or suppression shall also be built in for protecting the metersfrom surges and voltage spikes that occur in the VT/CT circuits of the switchyards. The

reference frequency shall be 50Hz.

4.0 The microprocessor based 3 phase 4 wire meters shall conform to class 0.2S as per IS14697 for Indian manufacturers or IEC- 62053-22 (2003) for foreign manufacturers &technical specification and meter shall be stand alone type. The meters shall bear BIScertification mark, if required as per Govt. of India Gazette notification. It will be theresponsibility of the bidder to get these meters marked with BIS certification. The BIScertification shall be supplied with the tender.

5.0 Meters shall be supplied with associated TTBs. The Meters shall have following features: -

a) Meter shall be stand alone type.

b) For transfer of data, system should have multiple communication ports as described inthe following paragraphs

6.0 The active energy measurement (Wh) shall be carried out on 3 phase 4 wire principle withan accuracy as per class 0.2S of IS 14697/IEC- 62053- 22 (2003) In the meters theenergy shall be computed directly in CT/VT secondary quantities and indicated in Watt-hours. The meters shall compute the net active energy (Wh) sent out from the Sub-Station during each successive 15 minute block, and store in its memory along with +/-sign. It shall also display on demand the net WH sent out during the previous 15 minuteblock, with a minus sign if it is a net Wh receipt.

7.0 Further, the meter shall continuously integrate and display on demand the netcumulative active energy sent out from the Sub-Station upto that time. Thecumulative Wh reading at each midnight shall be stored in the meters memory. Theregister shall move backwards when active power flows backwards into the Sub-Station.

8.0 The meter shall count the number of cycles in VT output during each successive 15-minuteblock and divide the same by 900 to arrive at the average frequency. This shall be storedin the meter's memory as a 2-digit code, which shall be arrived at by subtracting 49 fromthe average frequency, multiplying by 50 and neglecting all decimals. For e.g. 49.89 Hzshall be recorded as 44. In case the average frequency is less than 49.0 Hz, it shall berecorded as 00. In case it is 51.0 Hz or higher, it shall be recorded as 99. The average

frequency of the previous 15-minutes block shall also be displayed on demand in Hertz.The accuracy of the voltage measurement/computation shall be at-least 0.5%, a better


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accuracy such as 0.2% in the 95-105% range being desirable.

9.0 The meters shall continuously compute the average of the RMS value (fundamental only) ofthe three lines to neutral VT secondary voltage as a percentage of 63.51 V and displaythe same on demand.

10.0 The meter shall also compute the reactive power (VAR) on 3 phase 4 wire principle.Limits of error shall be corresponding to class 1.0 as per IS 14697 for reactive energy forIndian manufacturers or half (50%) of those permitted corresponding to class 2.0 forreactive energy as per IEC 62053-23 (2003) for foreign manufacturers, and integrate thereactive energy (VARh) algebraically in 2 separate registers, one for the period for whichthe average RMS voltage is 103% or higher and the other for the period for which theaverage RMS voltage is below 97%. The current reactive power (VAR) with a minus signif negative, and cumulative reactive energy (VARh) reading of the 2 registers shall bedisplayed on demand. The readings of the 2 registers at each midnight shall also bestored in the meter's memory. In the meter, the reactive power and reactive energytransmittals shall be computed in VAR/VARh directly calculated in VT and CT secondaryquantities. When lagging reactive power is being sent out from the Sub-Station. VAR

display shall have no sign and VARh registers shall move forward. When reactive powerflow is in the reverse direction. VAR display shall have a negative sign and VARhregisters shall move backwards.

11.0 The meter shall fully comply with all the stipulations of IS 14697/IEC- 60687-2000 (orlatest revision) for class 0.2S for static watt-hour meters except those specificallymodified by this specification. The reference ambient temperature shall be 50 deg. C.

12.0 Error shall be as per IS-14697/ IEC- 62053- 22 (2003)for all power factor angles from 0 deg. to

360 deg.

13.0 Each meter shall have a test output device (visual) for checking the accuracy of active

energy Wh and reactive energy (VARh) measurement using a suitable test equipment.The test output shall be software configurable for active energy import/export andreactive energy import/export.

14.0 No rounding off to the next higher last decimal shall be done for voltage and frequencydisplays.

15.0 The three line to neutral voltages shall be continuously monitored by individual phasewise LED's, and in case any of these falls below 70%, the normally flashing lampprovided on the meters front becomes steady. The time blocks in which such a voltagefailure occurs/persist shall also be recorded in the meter's memory. The lamp shallautomatically resume flashing when corresponding VT secondary voltage is healthyagain. LCD indication are also acceptable. The two VARh registers specified in clause-10shall remain stay-put while VT supply is unhealthy.

16.0 The meters shall operate with the power drawn from the VT secondary circuits, withoutthe need for any auxiliary power supply. The total burden imposed by a meter formeasurement and operation shall not exceed 10 VA on any of the phases.An automatic backup for the continued operation of the meter's calendar clock shall beprovided through a long life battery, which shall be capable of supplying the requiredpower for atleast two years. The meters shall be supplied duly fitted with the batterywhich shall not require to be changed for atleast 10 years, as long as total VT supplyinterruption does not exceed two years. The battery mounting shall be designed to

facilitate easy battery replacement without affecting PCB of meter.


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17.0 Each meter shall have a built-in calendar and clock, having an accuracy of 30 secondsper month or better. The calendar and clock shall be correctly set at the manufacturer'sworks. The date (day-month-year) and time (hour-minute-second) shall be displayed onthe meter front on demand. Clock adjustment shall be possible at site using the MeterReading Instrument (MRI) or remotely using time synchronization signal through RS 485.For the purpose of getting the standard time, the computer (s) from where the meter will

be read shall be equipped with GPS signal receiver. This computer and the GPSreceiver, however, are not in the scope of this specification. When an advance or retardcommand is given, six subsequent time blocks shall be contracted or elongated by 10seconds each. The meter shall not accept another clock correction command for sevendays. The meter time shall automatically be corrected every time the remote computerinterrogates it. All clock corrections shall be registered in the meter's memory and shallbe suitably shown on the print out of the collected data

18.0 Each meter shall have a unique identification code, which shall be marked permanentlyon the front as well as in its memory. All meters supplied to HVPN, as per thisspecification shall have their identification code starting with HVPN, which shall not beused for any other supply. HVPN shall be followed by a dash and a four digit running

serial number. The series of four digit running serial no. indicating the uniqueidentification code of each meter shall be provided by HVPN to the successful bidder.

19.0 The measured value(s) shall be displayed through LED/back-lit LCD display with properidentification for indication of the following (one at a time) on demand.

19.1 Meter Serial No.

19.2 Date (dd-mm-yy) 'd'

19.3 Time (hr-min-sec) 't'

19.4 Cumulative Wh reading 'c'

19.5 Average frequency of the previous 15-minute block 'F'

19.6 Net Wh transmittal in the previous 15-minute block, with+/- sign

'E'

19.7 Average percentage voltage 'U'

19.8 Reactive power (VAR) with +/- sign 'r'

19.9 Voltage high VARh register reading 'H'

19.10 Voltage-Low VARh register reading 'L'

19.11 Low Battery Indication

20.0 A keypad or scrolling facility shall be provided on the front of the meter for switching onthe display of the meter parameters selected and for changing from one indication tonext.

21.(A) Meter shall have a non-volatile memory in which the following shall be automaticallystored.

21.1 Average frequency for each successive 15-minute block upto second decimal/as a two-digit code.

21.2 Net Wh transmittal during each successive 15-minute block upto second decimal/with plus minus

sign.

21.3 Cumulative Wh transmittal at each midnight in 6 digits including one decimal.

21.4 Cumulative VARh transmittal for voltage high condition, at each midnight in 6 digit including one

decimal.

21.5 Cumulative VARh transmittal for voltage low condition, at each midnight in 6 digit including one

decimal.

21.6 Date & time blocks of failure of VT supply on any phase, as a star (*) mark.

21.(B) Battery backed memory shall not be accepted.

22.0 The meter shall store all the above listed data in their memories for a period of 35 days. The

data older than 35 days shall get erased automatically.


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23.0 CMRI/DCD: To ensure inter operability of system at the meter reading instrument end,the common meter reading instrument (CMRI) or data collection devices (DCD)confirming to DOS platform and having min. 16 MB memory shall be used to enabledifferent manufacturers to download into same hand held terminal & the meters of

various makes to be read through the same hand held terminal. Each CMRI shall becomplete with:-

i) a lead with optical head for coupling it to the meter,ii) a lead for plugging it to a personal computer;iii) an internal battery for powering the devices;iv) a case for safely carrying it aboutv) a battery charger

The total arrangement shall be such that one (1) operation can carry out the wholeoperation, in about five (5) minutes per meter.

Portable Meter Reading Instruments (MRI)/data collection devices (DCD) shall have a key forstarting the data tapping from the coupled meters memory, a key to start data transfer tothe PC, and a lamp, which would light up on completion of data collection, remain onwhile the data is held in the device and would go off when all data has been transferredto the PC. Data tapping operation from CMRI/DCD shall not erase the data from themeters memory, or effect the meter operation in any way. The memory of the CMRI/DCDshall get automatically cleared when the data has been transferred to the PC only thenthe CMRI/DCD shall accept data from another meter. CMRI/DCDs shall also havenecessary provision for meter clock correction. CMRI/ DCDs shall be compatible withearlier supplied meters in regard to data downloading etc.

23.1 Each meter shall have an optical communication port compatible to RS 232 on its front

for tapping all data stored in its memory. In addition to the above each meter shall beprovided with a RS485 port on one of its sides, from where all the data stored in themeters memory can also be tapped. Portable Meter Reading Instruments (MRI)/datacollection devices (DCD) of SANDS, ANALOGIC make have already been providedseparately for this purpose, one for each Sub-Station, to serve as interface between themeters specified above and the local PC. Meter shall be compatible with earlier suppliedCMRI/DCD. Each meter shall be provided with a lead having optical head for couplingthe meter to CMRI/DCD.

23.2 Software Package: The existing metering system records all the parameters required for theAvailability Based Tariff. Suitable software for CMRI shall be provided by the bidder forsmooth downloading of the data to/ from the CMRI. For data analysis & billing, thedifferent meter manufacturers shall provide the meter reading software to interpret thedata collected through CMRI or through RS485 for conversion into a common ASCIIformat. The Data of the existing meters is available in the specified ASCII Format; detailsof which are enclosed at Annexure-II (Page1 to 3). A similar output in the same ASCIIformat (space delimited, fixed length values) shall be made available from the newmeters by the successful bidder for future use of data for generation of BST & ABTBills/Reports or any other purpose. In addition to this successful bidder shall makeprovision to supply load survey data in Excel format as per Annexure-III.The suppliershall provide above software which would enable a local PC to:-

i) accept the data from the CMRI and/or from a interface device connected to the optical

port/RS-485 port and store it in its memory in binary read only format.


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ii) Polling feature along with a task scheduler to run the data downloading software at a pre-designated date and time repeatedly or by manually selecting a meter. A detailed activitylog shall also be available for each downloading operation.

iii) Display the collected data on PCs screen on demand as per annexure-II & III in textformat, with forward/backward rolling.

iv) Print out in text format the data collected from one or more meters as per annexure-II &

III, starting from a certain date and time, as per operators instructions.v) Transmit the collected data, in binary format, through an appropriate communication linkto the central computer, starting from a certain date and time, as per operatorsinstructions.

vi) Store the collected data, in binary format, on a floppy disc/CD/Pen drive/DVD.

The above software shall further ensure that absolutely no tampering (except totalerasures) of the collected metering data is possible during its handling by the PC. Thesoftware shall be suitable for the commonly available PCs and shall be supplied to ownerin a compatible form to enable its easy loading into the PCs available at the various Sub-Stations/Energy Accounting Centre.

23.3 The overall intention is to tap the data stored in the meter memory at any time from any ofthe two ports mentioned above and transmit same to a remote centre computer usingcommunication links, through the local PC. It should also be possible to obtain a print out(hard copy) of all data collected from the meters, using the PC. The received/downloaded meter data should be the original output from the meter.

23.4 As a part of commissioning the Contractor shall load the software in the PCs at therespective substations, and fully commission the total meter reading scheme. He shallalso impart the necessary instructions to substation engineers.

24.0 The whole system shall be such as to provide a print out (both from the local PC and theremote central computer) of the following form:

23 55 +16.28 56 +15.95 55 +15.32 54 +15.66

55 +14.93 55 +14.26 54 +14.85 56 +15.17

HVPNL **** 12345.6 01234.5 00123.4 99-04-28

57 +14.72 56 +13.83 55 +13.57 53 +12.91

01 52 +13.34 51 +12.76 52 +14.11 52 +15.28

25.0 All the meters shall be identical in all respects except for their unique identification codes.They shall also be totally sealed and tamper proof, with no possibility of adjustment atsite except for a restricted clock correction.

26.0 The meter shall safely withstand the usual fluctuations arising during faults in particular,VT secondary voltage 115% of rated applied continuously and 190% of rated for 3seconds and CT secondary current 150% of rated applied continuously and 30 times ofrated applied for 0.5 seconds, shall not cause any damage to or the mal-operation of themeters.

27.0 The meter shall continue to function for remaining healthy phase(s), in case of failure ofone or two phases of VT supply. In case of a complete VT supply failure, the computationof average frequency (as per 8.0) shall be done only for the period during which the VTsupply was available in the 15-minute block. Any time block contraction or elongation forclock correction shall also be duly accounted for.

28.0 The harmonics shall be filtered out while measuring the Wh, VAR and VARh and onlyfundamental frequency quantities shall be measured or computed.


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29.0 VOID

30.0 VOID

31.0 Every meter shall be indelibly marked with connection diagram showing the phase sequence for

which it is intended and shall be attached on the meters. In case of any special precautions need tobe taken at the time of testing the meter, the same shall be indicated alongwith the circuit diagram.

32.0 VOID

33.0 Sealing arrangement: Sealing arrangement for meters and TTBs shall be provided asunder:

33.1 TTBs: Each TTB shall have the provision for two seals.

33.2 Meters: Meter body or cover & meter terminal blocks shall be sealable including each opticalcommunication port.

34.0 The meters shall be supplied housed in compact and sturdy; metallic or moulded cases ofnon-rusting construction and/or finish. The cases shall be designed for simple mountingon a plane, vertical surface such as a control/relay panel front. All terminals for CT andVT connections shall be arranged in a row along the meters lowerside. Terminals shallhave a suitable construction with barriers and cover, to provide a secure and safeconnection of CTs and VTs leads through stranded copper conductors of 4.0 sq. mm.size.


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The meters shall also withstand without any damage or maloperation reasonablemechanical shocks, earthquake forces, ambient temperature variations, relative humidityetc. They shall have an IP-51 category dust-tight construction, and shall be capable ofsatisfactory operation in an indoor, non-air conditioned installation.

The contractor shall be responsible for total installation and commissioning of the meters(alongwith test blocks, if supplied separately)as per Owners advice, including unpackingand inspection on receipt at site, mounting the meters on existing control and relaypanels at an appropriate viewing height., connection of CT and VT circuits including anyrequired rewiring (however, supply & installation of 4cx4mm2 control cables from CT, VTto metering system are not in the scope of this specification), functional testing,commissioning and handing over. The Contractors personnel shall procure/carry thenecessary tools, equipment, materials and consumables (including insulated wires, lugs,ferrules, hardware etc.).

35.0 Inspection & Testing:

35.1 Type Tests:

The meter should be fully type tested as per IS 14697 for Indian Manufacturers or IEC-62053-22

(2003) & IEC-62053-23 (2003) for foreign manufacturers.

35.2 Routine Tests:

All Routine tests as per IS 14697 shall be carried out by the supplier on the meters for compliance

in both directions of power flow.

35.3 Acceptance Tests:

All equipment, after final assembly and before despatch from manufacturer's works shall be duly

tested as per IS 14697 for compliance in both directions of power flow in presence of purchaser's

representative, unless dispensed with in writing by the purchaser. In addition, the following

acceptance tests shall also be conducted:-

1. Functional checks for display and memory.2. Accuracy of voltage and frequency measurement.

All DCDs/MRIs after final assembly and before dispatch from Manufacturers works shall be duly

tested to verify that they are suitable for supply to the purchaser. In particular, each and every

DCD/MRI shall be subjected to the following acceptance test:-

1. Functional checks

2. Downloading Meter Data from the Meter(s).

3. Compatibility with PC software

4. Downloading the meter data on PC

5. Functioning of advance and retard time commands.

6. Per meter downloading time verification

7. Capacity of DCD/MRI for data storage.

36.0 Quality Assurance


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The quality control procedure to be adopted during installation of the specified equipment shallbe mutually discussed and finalized in due course, generally based on the establishedand proven practices.

37.0 Any meter, which fails to fully comply with the specification requirements, shall be liable

to be rejected by the purchaser.

38.0 VOID

39.0 Following technical information shall be furnished by the bidders in their offers.:

39.1.1 The prospective bidder shall be required to submit complete type test reports from Govt.approved laboratory alongwith bid. The type test reports shall not be more than seven years old

reckoned from the date of opening of part-1 tender.

39.2 Guaranteed Technical Particulars as per Annexure-I.

40.0 SERVICE CONDITIONS

Equipment to be supplied against this specification shall be suitable for satisfactory continuous

operation under the following tropical conditions:-

i. Location IN THE STATE OF HARYANA

ii. Max. ambient air temp (0C) 50

iii. Min. ambient air temp (0C) -2.5

iv. Maximum Relative humidity (%) 100

v. Minimum Relative humidity (%) 26

vi. Average annual rainfall (mm) 900

vii. Max. wind pressure (Kg/sq.m.) 195viii. Max. altitude above mean sea level (meters) 1000

ix. Isoceraunic level (days/year) 50

x. Seismic level (horizontal acceleration) 0.3g

Note: Moderately hot and humid tropical climate conducive to rust and fungus growth. The climatic

conditions are also prone to wide variations in ambient conditions. Smoke is also present in the

atmosphere. Heavy lightening also occur during June to October.


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Annexure-I

GUARANTEED TECHNICAL PARTICULARS FOR THREE-PHASE FOUR WIRE CLASS 0.2SACCURACY POWER MONITORING SYSTEM.

1. Makers name and country2. Type of Meter/Model

3. Standards to which the meter conform

4. Accuracy class

5. Parameters measured

6. P.F. Range

7. Overload capacity

8. Variation of voltage at which system function normally

9. Minimum starting current

10. MD reset provisions

11. Reset count

12. No. of digits of display13. Particulars of readout by CMRI

14. Non volatile memory retention time in absence of power

15. Memory capacity (kb)

16. Demand integration period

17. Pulse output for each meters

18. Metrology indicator for each meters

19. Communication capability ona. Local port

b. Remote port

20. Load survey parameters

21. Power Consumption per phaseii) Voltage circuit.ii) Current circuit.

22. Self diagnostics features, if any (Provide details)

23. Principle of operation (Provide details)

24. Foreseen dimensions of proposed meter.

25. Expected weight of proposed meter

26. Foreseen dimensions of DCD/MRI.

27. Expected weight of DCD/MRI.

28. Dimensions and weight of the test block, if supplied separately.

Annexure-II

Standard Format for Meter Readings, Energy data

First Row/*-- Header Information : Starting date & time and End date & time is defined

First row


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Starting time 4 character (11th character to 14th character).

Starting date 8 character (23rd

Character to 30th

Character),

Ending time 4 character (35th

Character to 38th

Character),

Ending date 8 character (47th

Character to 54th

Character)

RTC Synchronization Status Indicator 1 Character (56th Character): 1 indicates RTC synchronized, 0

indicates RTC not synchronized.

Second Row:

Meter Sr. No 10 Characters (1st

to 10th

Character),

Mid Night Net Wh 7 Character (15th

Character to 21st

Character),

Reactive High Energy 7 Characters (26th

Character to 32nd

Character),

Reactive Low Energy 7 Characters (37th

Character to 43rd

Character),

Data Date 8 Characters (48th

Character to 55th

Character)

Third Row is Blank

Fourth row: 16 IP data in each row

Starting Hour 02 Characters (1st

, II nd Character),

Avg. Freq 2 Characters (5th

, 6th

character),

Status Indication 3 character (7th Character to 9th character),

Net Energy 6 Character (10th

to 15th

Character)

2 Character left blank and all the data will be repeated 16 times

Fifth Row : Same as 4th

Row

Sixth Row : Same as 4th

Row

Seventh Row : Same as 4th

Row

Eighth Row : Same as 4th

Row

Ninth row:

Same as 4th row and at the end net energy of 24 hours at 215th Character (4 Character)

Lines will be repeated from 2nd

line onwards as above.


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/*-- Header Information

One Block At the beginning of each day in Following Format:

Meter SerialNo MidNight Net Wh Reactive High Energy Reactive Low Energy Date

16 IP data in each row and total 6 rows for complete 24 hours data

Format for IP wise information:

StartingHour AvgFreq StatusIndication NetEnergy AvgFreq StatusIndication NetEnergy ...

StatusIndication gives following Information:

* to indicate Supply Down.Supply failure might be momentary or might have lasted for several IPs

rr to indicate time retard "aa" to indicate time advance

Sum of net energies(for 96 IP) at the end of last row of the day having complete 24 hours data

--*/


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Annexure III

/* Header

Information */

Meter Serial No.

Load Survey Data From: 26/02/2010 To:

01/04/2010

DateTime

Slot

Coded

Frequency

Net

Wh

Time

Retard/Advance

PT Status Indicator

(for low voltage

indication)

2/26/2010 0:15 49 15.78 aa *

2/26/2010 0:30 23 9.64 rr *

2/26/2010 0:45

2/26/2010 1:00

2/26/2010 1:15

2/26/2010 1:30

2/26/2010 1:45

2/26/2010 2:00

2/26/2010 2:152/26/2010 2:30

2/26/2010 2:45

2/26/2010 3:00

2/26/2010 3:15

2/26/2010 3:30

2/26/2010 3:45

2/26/2010 4:00

2/26/2010 4:15

2/26/2010 4:30

2/26/2010 4:45

2/26/2010 5:002/26/2010 5:15

2/26/2010 5:30

2/26/2010 5:45

2/26/2010 6:00

2/26/2010 6:15

2/26/2010 6:30

2/26/2010 6:45

2/26/2010 7:00

2/26/2010 7:15

2/26/2010 7:30

2/26/2010 7:45

2/26/2010 8:002/26/2010 8:15

2/26/2010 8:30

2/26/2010 8:45

2/26/2010 9:00

2/26/2010 9:15

2/26/2010 9:30

2/26/2010 9:45

2/26/2010 10:00

2/26/2010 10:15

2/26/2010 10:30

2/26/2010 10:45

2/26/2010 11:00


37/38

- 36 -

2/26/2010 11:15

2/26/2010 11:30

2/26/2010 11:45

2/26/2010 12:00

2/26/2010 12:15

2/26/2010 12:30

2/26/2010 12:452/26/2010 13:00

2/26/2010 13:15

2/26/2010 13:30

2/26/2010 13:45

2/26/2010 14:00

2/26/2010 14:15

2/26/2010 14:30

2/26/2010 14:45

2/26/2010 15:00

2/26/2010 15:15

2/26/2010 15:30

2/26/2010 15:452/26/2010 16:00

2/26/2010 16:15

2/26/2010 16:30

2/26/2010 16:45

2/26/2010 17:00

2/26/2010 17:15

2/26/2010 17:30

2/26/2010 17:45

2/26/2010 18:00

2/26/2010 18:15

2/26/2010 18:30

2/26/2010 18:45

2/26/2010 19:00

2/26/2010 19:15

2/26/2010 19:30

2/26/2010 19:45

2/26/2010 20:00

2/26/2010 20:15

2/26/2010 20:30

2/26/2010 20:45

2/26/2010 21:00

2/26/2010 21:15

2/26/2010 21:302/26/2010 21:45

2/26/2010 22:00

2/26/2010 22:15

2/26/2010 22:30

2/26/2010 22:45

2/26/2010 23:00

2/26/2010 23:15

2/26/2010 23:30

2/26/2010 23:45

2/26/2010 0:00

Total


38/38

DateTime

Slot

Coded

Frequency

Net

Wh

Time

Retard/Advance

PT Status Indicator

(for low voltage

indication)

2/27/2010 0:15

2/27/2010 0:30

2/27/2010 0:45

2/27/2010 1:002/27/2010 1:15

2/27/2010 1:30

2/27/2010 1:45

2/27/2010 2:00

2/27/2010 2:15

2/27/2010 2:30

2/27/2010 2:45

2/27/2010 3:00

2/27/2010 3:15

2/27/2010 3:30

2/27/2010 3:45

2/27/2010 4:002/27/2010 4:15

2/27/2010 4:30

2/27/2010 4:45

2/27/2010 5:00

2/27/2010 5:15

2/27/2010 5:30

111_11 Kv VCBs1250A Sep.2012 (Manual)

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Transcript of 111_11 Kv VCBs1250A Sep.2012 (Manual)