11 KV, 12 Panel Board Vacuum Type Swithgear _1250_A

HARYANA VIDYUT PRASARAN NIGAM LIMITED

SPECIFICATION No.: HGD/S- 41/R-2/DGM-89

TECHNICAL SPECIFICATION

FOR

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

CHIEF ENGINEER/MM,HVPNL, PANCHKULA

NOVEMBER- 2010

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

1.0 SCOPE:

This specification covers the design, manufacture, assembly, testing atmanufacturer'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 circuitbreakers

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

3 IS- 2147 Degree of protection provide for enclosures forlow voltage 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.

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 clad cubicle,dust and vermin proof with necessary isolation arrangement. Each panel shallbe easily extensible on either side and should be complete with necessaryinternal copper connections, small wiring, L.T. fuses and supporting framework with bolts to secure it to the floor. The maximum permissible width ofeach panel should not be greater than 710mm. The Circuit Breakers shall bedraw 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 MVAcapacity

4.8 Impulse withstand test 75 kV (Peak)voltage

4.9 One minute power 28 kV (rms)frequency withstandtest 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 for 220V DC . The operating mechanism shall work satisfactorily at 85 % - 110 % ofrated supply voltage. The VCB shall have 2 normally open & 2 normally-closedauxiliary contacts over & above the ones required for various 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 breaker controlswitch.

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 of notless than 4.0 mm2 cross-sectional area whereas control/alarm/supervisioncircuit shall use wire of not less than 2.5 mm2 cross-sectional area. All wireswill be continuous from one terminal to the other and, also will have noTee-junction enroute. The connections shall be securely made with the help ofconnecting lugs duly crimped on to the copper 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.

The panels shall have a degree of protection of IP-4x. The leads from meteringCTs shall be directly terminated at TTB & there from at the KWH meter with aprovision to seal TTB and KWH meter. The said CT leads will be concealed to

prevent their tempering enroute. Similarly PT leads from secondary box of thePT to TTB & there from to energy meter including inter panel PT leads will alsobe concealed to prevent their tempering. The mode & extent of concealing themetering leads of CTs & PTs to prevent their tempering (by unscrupulousoperating personnel) will be discussed & mutually agreed upon with thesuccessful bidder(s). TTB used on the instrument panel should be suitable forfront connections.

Earthing of current free metallic parts or metallic bodies of the relays/switchesmounted on the instrument panel and metal enclosed switchgear shall be doneby a suitably sized copper conductor. Earth bus made of 25x3 mm barecopper flat will be extended through entire length of 11 kV switch-board withsuitable provision to connect it to the sub-station earth at the extremities. Theearthing arrangement will meet with the requirements laid down in IS : 3427read 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. Vacuum Interruptersfor incomers as well as outgoing shall be of same type. These vacuuminterrupters 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 shall bewound/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 CTsfrom one panel to another must be ensured.

A resin cast potential transformer of ratio (11000/3)/(110/3) volts having 100VA output per phase with accuracy class 1.0 as perISS : 3156 (part-II)-1965 shall be provided on the incoming side of each panelset and shall be star/star connected.

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.

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 allswitchboards and shall be connected in a separate moisture and vermin proofsheet metal chamber. The cross sectional area of bus bar should however notbe less than 1200 mm2 per phase. The bus-bars connections & insulatorsupports shall be mechanically strung & rigidly supported so as to withstandthe stresses generated by vibrations, variations in temperature and due tosevere short circuits.

The bus bars shall be heat shrunk PVC sleeves insulated type and supportedon insulators at short intervals keeping adequate clearance as per IE rulesbetween bus bars and earth. The bus bar chamber shall be provided withinspection covers with gaskets & bus bar shutters. Provision shall be made forfuture 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 between differentpieces of apparatus provided for reasons of safety & for convenience ofoperation of switchgear shall meet with the requirement of IS : 3427-1969 readwith its latest amendment. Efficient mechanical interlocking shall be providedto 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 fully

open position as well as it is in Isolated/test position.iii) It shall not be possible to remove the breaker until the moveable plug

unit having secondary connections has been withdrawn.iv) It shall not be possible to replace in position moveable plug unit unless

the circuit breaker has been racked in.v) Provision of shutters or locks shall be made to prevent access to bus

bar chambers and receptacles when the circuit breaker is withdrawn.vi) Provision shall be made for locking the circuit breaker closing

mechanism in open position.

5.9 CABLE BOXES:

Each 11 kV incoming VCB shall be provided with cable terminationarrangement suitable for receiving 2 sets of cable each comprising 3 nos 630mm2, 11 kV single core XLPE, outer PVC sheathed cables. However cableboxes complete with jointing kits & sealing material suitable for receiving 1 setof cable each comprising 3 nos 630 mm2, 11 kV single core XLPE, outer PVCsheathed cables shall be supplied for each incomer. The 11 kV capacitorcontrolling VCB shall be provided with cable boxes suitable to receive 2 setsof 3 core, 11 kV XLPE PVC Sheathed cables of size of 185 mm2 for3000KVAR Capacitor bank and 300mm2 for 6000KVAR Capacitor Bank (panelwith CT ratio 300-150-75/5 A). The 11 kV station transformer VCB shall beprovided with cable boxes suitable to receive 3 core, 11 kV, XLPE cables ofsize upto 50 mm2 (panel with CT ratio 60-30/5 A). Each cable box shall havevertical entry from below. These cable boxes shall be complete in all respectsincluding cable glands of requisite size. The cable boxes should only be eitherheat shrinkable or push on type. The cable boxes for outgoing panels are notin the scope of this specifications.

5.9A Earthing TruckOne no. earthing trolley should be provided for each incomer panel. Earthingtrolley must be full fault make type device which is capable of making fault at46.2 KA(peak) and carry 18.4 KA for one second. The earthing truck forincoming panel must be so designed that it is impossible to earth a live circuit.However manufacturers offering this a standard inbuilt feature of BreakerTrolley is also acceptable

5.10 SUPERVISION SCHEME :

5.10.1 Instrument panels on each of the 11 kV VCB covered by this specification shallbe provided with the following indicating lamps/relay:-

Circuit breaker `open' GreenCircuit breaker `close' RedAuto trip WhiteCircuit breaker spring charged BlueFor monitoring of trip circuit both in pre-close and post- close position of thecircuit breaker, 1 no. automatic trip circuit supervision relay will be provided oneach of the 11 kV (incoming) instrument panel. In case of trip circuit becomingfaulty, the operation of this relay shall be accompanied by visual and audioannunciation in accordance with clause 5.10.1 of the specification.

However, the trip circuit of each of the 11 kV outgoing / capacitor / Stn. VCBwill be monitored `on demand' with the help of an indicating lamp & a pushbutton both when the VCB is `open & closed'. The lamp will be `amber'coloured.

Circuit breaker `close' & `open' 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 alarm schemecomprising suitable auxiliary relay (rated for 220 V DC), accept push button,reset push button & a buzzer. It will cater to non-trip condition such as tripcircuit faulty & PT secondary fuses blow `off'. The non-trip alarm scheme willmeet 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 not resetuntil the fault has cleared.

iii) It shall be possible to silence the buzzer by pressing `accept' 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 some otherfault 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 button andresetting of visual signal may also preferably be done through a pushbutton.

vii) Means shall be provided for test checking the lamp and alarm circuit atfrequent 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

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 relay tomonitor the fuses on the secondary side of 11 kV metering PT. The failure ofany of secondary fuse on the 11 kV PT will be accompanied by visual & audioindication in accordance with clause 5.10.1 of the specification. None of the 11kV outgoing/capacitor/Stn. VCB will be provided with fuses & inter-circuit PTleads 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 facilitating measurementof phase currents as well as unbalance current. The coil of ammeter shall berated for 5 Amp. The instrument shall be of moving iron spring controlled typeof industrial grade `A' classification having accuracy class 1.0 & shall conformto 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 tophase). 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 will be equipped witha three-phase four-wire Electronic KWH meter. The KWH meter shall be ratedfor 5 A CT secondary and 110 V/3 (phase to neutral) available from 11 kV PTmounted on each of the incoming VCB. The instrument shall be havingaccuracy 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 2 elementtype suitable for use on three phase three wire unbalanced system. It shall berated for 5 A CT secondary & 110 V (phase to phase) available from 11 kV PTmounted on each of the 11 kV incoming VCB. The instrument shall beiron-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.

5.14 CONTROL SCHEME :

5.14.1 The instrument panel of each of the 11 kV VCB will be equipped with a circuitbreaker control handle of pistol grip type with spring return to neutral positionand having bell alarm cancellation contacts. The control handle shall be sodesigned that after being operated to `close' a VCB the operation can not berepeated until the control handle has been turned to `trip' position making itimpossible 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 contacts shallbe of such a shape & material to ensure good contact and long life underservice 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:

Each incoming instrument panel shall be provided with a single pole restrictedearth fault relay suitable for 5 A CT (Secondary) with a setting range of 10 %to 40 % of 5 Amp.( Strictly in steps of 5%). In case, the bidder offers voltage-operated REF relay, the same shall be technically justified with aid of samplecalculations which will also form a part of the instruction manual for the saidrelay. The relay shall be housed in draw out flush mounting case. The back upprotection shall be in the form of a combined over current and earth faultrelay(two over current and one earth fault). This shall be triple pole havingInverse Definite Minimum Time (IDMT) characteristics with a 3/10 time currentcurve i.e. the relay operating time shall be 3 second at 10 times the plugsetting at TMS 1. The outer element of the relay shall be arranged for overcurrent protection and shall have a setting range of 50-200 % of 5 A (The relayfor station transformer shall have a setting range of 20-80 % of 5 A) andadjustable in suitable equal steps by means of a plug board. The centralelement shall be used for earth fault protection with a setting range of 20-80 %of 5 A adjustable in suitable equal steps by means of a plug board (for stationtransformer panels, the setting range shall be 10-40% of 5 A ) Each of thethree elements shall be fitted with shunt reinforcing unit with hand resetoperation indicator.

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 earthfault element) conforming to the technical specification stated in the clause :5.15.1 above and one set of triple pole instantaneous relay (high set element)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 adjustable insuitable steps.

The central element shall be used for earth fault protection with a setting rangeof 200-800 % of 5 A (The relay for station transformer shall have setting rangeof 100-400 % of 5 A) adjustable in suitable steps.

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

5.15.3 FOR CAPACITOR PANEL:

Each capacitor panel shall be provided with the following relays for protectionof 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) VCBalongwith auxiliary transformers(for external mounting) of ratio110/103.5 to 116.5 V ( in steps of one volt) to be used for compensatingthe 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 (Residual voltage transformer is nota part of this specification). The bidders offering relays with differentsettings than above shall technically justify their offer.

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

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 shallbe in draw out or plug-in type modular cases with proper testing facilities.Necessary test plugs/test handles shall be supplied loose and shall beincluded in contractors scope of supply.All main protective relays (viz over current and earth fault, Restricted EarthFault, Over voltage and neutral displacement) shall be numerical type andcommunication protocol shall be as per IEC 61850. Further, the test levels ofEMI as indicated in IEC 61850 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, thesupply 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 indicators shallbe provided on all protective relays/ on their immediate auxiliary units toindicate the type of fault & phase / phases involved. It shall bepossible to reset the operation indication without opening the relay case. Theroutine test certificates of all protective & auxiliary relays will be submittedalongwith routine test certificates of 11 kV switchgear covered by thespecification.

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 operation ofDC fail scheme shall be accompanied by visual (indicating lamp on theinstrument panel) & audio (ringing of hooter) annunciation. It shall be possibleto silence the hooter by pressing the `accept' push button while the lamp shallcontinue to glow till the fault has been attended to & DC supply restored. A DCfail `Test' push button may be provided to test the lamp circuit 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, in respectof the following tests, carried out in accordance with ISS-13118/IEC-56, fromGovt./Govt. approved test house, shall be submitted along with bid:

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 conducted atFirms 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 shall besubmitted 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 old reckonedfrom 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 will also be presented to HVPNL's inspecting officer who willforward them to the purchaser alongwith his inspection report for the mainequipment. All test reports should be got approved from the purchaser beforedespatch 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 in respectof 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.

Four copies of the descriptive literature in respect of 11 kV switchgear, relays,KWH meters, 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. Thesedrawings will be opened in the event of order. The Purchaser shall communicatehis comments/approval on the drawings to the Supplier within four weeks of theissue of LOI. The supplier shall, if necessary, modify the drawings & resubmit fourcopies of the modified drawings for purchaser's approval within two weeks fromthe date of receipt of purchaser's comments. The modified drawings will beapproved within 15 days of their receipt by the purchaser. After receipt ofpurchaser's approval to drawings, a set of reproducibles of approved drawings &five sets of all the approved drawings and operating manuals containing, erection,operation & maintenance instructions per 11 kV switchboard shall be supplied toCE/D&P, S/Stn. Design Dte., HVPNL, Power Colony, Panchkula for use byvarious agencies of the purchaser. However, one set of drawings and operatingmanual will be despatched alongwith each 11 kV switch board. The 11 kVswitchgear will not be fabricated without getting the drawings approved from thepurchaser.

In order to ensure timely receipt of all the drawings, literature & reproducibles etc.,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 specification eitheron 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. Any deviationfrom this specification shall be clearly brought out separately.

ANNEXURE-'A'

SCHEDULE OF GUARANTEED AND OTHER TECHNICAL PARTICULARS

1. Maker's name & country of manufacturer.2. Type3. 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

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.

(ix) Standard to which conform.

C. RELAYS :

(i) Name of manufacturer.

(ii) Type & make

(iii) Setting range

(iv) Other details

(v) Standard to which conform

D. BUS BAR1. Material

2. Normal current rating

3. Nominal area per phase

4. Shape.

5. Type of insulation.

E. VACUUM INTERRUPTER BOTTLE1. Name of manufacturer.

2. Whether imported or indigenous.

3. Manufacturer's type, normal Amps. &rupturing capacity for vacuum bottlesused on incoming panel.

4. Manufacturer's type, normal Amp. &rupturing capacity for vacuum bottlesused on outgoing panel.

5. Manufacturer's type,. normal Amps.& rupturing capacity for vacuum bottlesused on capacitor control panel.

6. Degree of vacuum inside the vacuum interruptors.

7. Short time rating of vacuum bottles.

8. Number of full short circuit operation,as per test duty 1 to 5 of IEC-56 whichthe vacuum bottles offered can safely withstand.

9. Whether the vacuum bottles used onincoming and outgoing panels are sameor different.

10. Whether the operating mechanism isimported or indigenous.

(SIGNATURE OF SUPPLIER)

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 mm211 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 the 2ndcore for REF protection having a minimum knee point voltage of 92(RCT)V on 1200 Atap where RCT secondary winding resistance. These CTs shall conform to accuracyclass PS of ISS:2705 (Part-IV) and shall have magnetising current as low as possiblebut in no case exceeding the value corresponding to class 5 P of IS:2705 (Part-III).

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

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

-1 No. 3 phase star/star connected resin cast voltage transformer of ratio 11000/3 /110/3volts having 100 VA output for phase with accuracy class 1.0 as per IS: 3156(Part-II)1965 complete with HT & LT fuses, isolating plugs and sockets for HT & LTcopper connectors, current limiting resistances.

-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. KWH meter with TTB as per clause: 5.13.3 & 5.2 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: 5.15.1 ofthe specification.

-1 No. Single pole restricted E/F relay as per clause: 5.15.1 of the specification. This relaywill have one of its main contacts used for inter-tripping the H.V. transformercontrolling circuit breaker.

-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 `open', `close', `auto trip' & springcharged 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 & 5.11.2 ofthe 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 charged mechanismoperate 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 `open', `close', `auto-trip' & 'springcharged' as per clause 5.10 of the specification.

-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 required forcapacitor operation & should be suitable for controlling capacitive current upto 400 A at11 kV which is equivalent to 7.5 MVAR approx. & equipped similar to item No. 1.02except KWH meter but with the following changes/additions:

-2 No. Trifurcating main cable box for receiving 3 core XLPE, PVC sheathed cable of 185mm2 & 300mm2size and complete with cable glands and jointing kits etc. as perclause: 5.9 of the specification.

-3 No. CTs of ratio 300-150-75/5 A output & 5P10 accuracy for over current & earth faultprotection.

- 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 for metering.

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, tripalarm & protection schemes.

VACUUM TYPE 8 PANELS, 11 KV SWITCH BOARD AND EACH SWITCH BOARD COMPRISINGOF 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.

HARYANA VIDYUT PRASARAN NIGAM LTD.

TECHNICAL SPECIFICATIONS

FOR

INTERUTILITY METERING SYSTEM AND

COMMON METER READING INSTRUMENT(CMRI)

SPEC. NO. HPD/S-59/HPM-461/PROT. (JUNE-2010)

Chief Engineer/MMDesign Directorate,HVPNL, Shakti Bhawan,Sec-6, Panchkula-134109(HARYANA).Tel/Fax No. 0172-2583724

TECHNICAL SPECIFICATION FOR INTERUTILITY METERING SYSTEM

1.0 The specification covers the design, manufacturing, testing, inspection, delivery ofinterutility 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 -utility 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. HVPNL has already commissioned inter-utility meteringsystem at 33 kV & 11 kV Level. The new systems should be functionally compatiblewith the existing systems so that power flow is measured & has a facility of remotemetering. The prospective bidders can inspect any existing inter-utility meteringsystem working at different Sub-Stations of HVPNL and Energy Centre at ShaktiBhawan, HVPNL, Panchkula to obtain any relevant information in this regard at hisown expenses.

3.0 The meters shall be suitable for being connected through Test terminal blocks tothe voltage transformer having a rated secondary line to line voltage of 110 V, andto current transformers 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 themeters from surges and voltage spikes that occur in the VT/CT circuits of theswitchyards. The reference frequency shall be 50Hz.

4.0 The microprocessor based 3 phase 4 wire meters shall conform to class 0.2S asper IS 14697 for Indian manufacturers or IEC- 62053-22 (2003) for foreignmanufacturers & technical specification and meter shall be stand alone type. Themeters shall bear BIS certification mark, if required as per Govt. of India Gazettenotification. It will be the responsibility of the bidder to get these meters marked withBIS certification. The BIS certification shall be supplied within one month of openingof part-I tender.

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

a) Meter shall be stand alone type.b) For transfer of data, system should have multiple communication ports for local

reading and remote communication facility.

6.0 The active energy measurement (Wh) shall be carried out on 3 phase 4 wireprinciple with an accuracy as per class 0.2S of IS 14697/IEC- 62053- 22 (2003) Inthe meters the energy shall be computed directly in CT/VT secondary quantitiesand 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 inits memory along with +/- sign. It shall also display on demand the net WH sent outduring the previous 15 minute block, 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-minute block and divide the same by 900 to arrive at the average frequency. Thisshall be stored in the meter's memory as a 2-digit code, which shall be arrived at bysubtracting 49 from the average frequency, multiplying by 50 and neglecting alldecimals. For e.g. 49.89 Hz shall be recorded as 44. In case the average frequencyis less than 49.0 Hz, it shall be recorded as 00. In case it is 51.0 Hz or higher, itshall be recorded as 99. The average frequency of the previous 15-minutes blockshall also be displayed on demand in Hertz. The accuracy of the voltagemeasurement/computation shall be at-least 0.5%, a better 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 (fundamentalonly) of the three lines to neutral VT secondary voltage as a percentage of 63.51 Vand display the 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 reactiveenergy for Indian manufacturers or half (50%) of those permitted corresponding toclass 2.0 for reactive energy as per IEC 62053-23 (2003) for foreign manufacturers,and integrate the reactive energy (VARh) algebraically in 2 separate registers, onefor the period for which the average RMS voltage is 103% or higher and the otherfor the period for which the average RMS voltage is below 97%. The currentreactive power (VAR) with a minus sign if negative, and cumulative reactive energy(VARh) reading of the 2 registers shall be displayed on demand. The readings ofthe 2 registers at each midnight shall also be stored in the meter's memory. In themeter, the reactive power and reactive energy transmittals shall be computed inVAR/VARh directly calculated in VT and CT secondary quantities. When laggingreactive power is being sent out from the Sub-Station. VAR display shall have nosign and VARh registers shall move forward. When reactive power flow is in thereverse direction. VAR display shall have a negative sign and VARh registers shallmove backwards.

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

12.0 Error shall be as per IS-14697/ IEC- 62053- 22 (2003) for all power factor anglesfrom 0 deg. to 360 deg.

13.0 Each meter shall have a test output device (visual) for checking the accuracy ofactive energy Wh and reactive energy (VARh) measurement using a suitable testequipment. The test output shall be software configurable for active energyimport/export and reactive energy import/export.

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

15.0 The three line to neutral voltages shall be continuously monitored by individualphase wise LED's, and in case any of these falls below 70%, the normally flashinglamp provided on the meters front becomes steady. The time blocks in which sucha voltage failure occurs/persist shall also be recorded in the meter's memory. Thelamp shall automatically resume flashing when corresponding VT secondaryvoltage is healthy again. LCD indication are also acceptable. The two

VARh registers specified in clause-10 shall remain stay-put while VT supply isunhealthy.

16.0 The meters shall operate with the power drawn from the VT secondary circuits,without the need for any auxiliary power supply. The total burden imposed by ameter for measurement and operation shall not exceed 10 VA on any of thephases.An automatic backup for the continued operation of the meter's calendar clock shallbe provided through a long life battery, which shall be capable of supplying therequired power for atleast two years. The meters shall be supplied duly fitted withthe battery which shall not require to be changed for atleast 10 years, as long astotal VT supply interruption does not exceed two years. The battery mounting shallbe designed to facilitate easy battery replacement without affecting PCB of meter.

17.0 Each meter shall have a built-in calendar and clock, having an accuracy of 30seconds per month or better. The calendar and clock shall be correctly set at themanufacturer's works. The date (day-month-year) and time (hour-minute-second)shall be displayed on the meter front on demand. Clock adjustment shall bepossible at site using the Meter Reading Instrument (MRI) or remotely using timesynchronization signal through RS 485. For the purpose of getting the standardtime, the computer (s) from where the meter will be read shall be equipped withGPS signal receiver. This computer and the GPS receiver, however, are not in thescope of this specification. When an advance or retard command is given, sixsubsequent time blocks shall be contracted or elongated by 10 seconds each. Themeter shall not accept another clock correction command for seven days. Themeter time shall automatically be corrected every time the remote computerinterrogates it. All clock corrections shall be registered in the meter's memory andshall be suitably shown on the print out of the collected data

18.0 Each meter shall have a unique identification code, which shall be markedpermanently on the front as well as in its memory. All meters supplied to HVPN, asper this specification shall have their identification code starting with HVPN, whichshall not be used for any other supply. HVPN shall be followed by a dash and a fourdigit running serial number. The series of four digit running serial no. indicating theunique identification code of each meter shall be provided by HVPN to thesuccessful bidder.

19.0 The measured value(s) shall be displayed through LED/back-lit LCD display withproper identification 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 switchingon the display of the meter parameters selected and for changing from oneindication to next.

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 atwo-digit code.

21.2 Net Wh transmittal during each successive 15-minute block upto seconddecimal/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 of35 days. The data older than 35 days shall get erased automatically.

23.0 To ensure inter operability of system at the meter reading instrument end, thecommon 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 ofvarious makes to be read through the same hand held terminal. Each CMRI shallbe supplied complete 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 havea key for starting the data tapping from the coupled meters memory, a key to startdata transfer to the PC, and a lamp, which would light up on completion of datacollection, remain on while the data is held in the device and would go off whenall data has been transferred to the PC. Data tapping operation from CMRI/DCDshall not erase the data from the meters memory, or effect the meter operation inany way. The memory of the CMRI/DCD shall get automatically cleared when thedata has been transferred to the PC only then the CMRI/DCD shall accept datafrom another meter. CMRI/DCDs shall also have necessary provision for meterclock correction. CMRI/ DCDs shall be compatible with earlier supplied meters inregard to data downloading etc.

Each meter shall have an optical communication port compatible to RS 232 on itsfront for tapping all data stored in its memory. In addition to the above each metershall be provided with a RS485 port on one of its sides, from where all the datastored in the meters memory can also be tapped. Portable Meter ReadingInstruments (MRI)/data collection devices (DCD) of SANDS, ANALOGIC make

have already been provided separately for this purpose, one for each Sub-Station,to serve as interface between the meters specified above and the local PC. Eachmeter shall be provided with a lead having optical head for coupling the meter toCMRI/DCD.

23.1 Software Package: The existing metering system records all the parametersrequired for the Availability Based Tariff. Suitable software for CMRI shall beprovided by the bidder for smooth downloading of the data to/ from the CMRI. Fordata analysis & billing, the different meter manufacturers shall provide the meterreading software to interpret the data collected through CMRI or through RS485 forconversion into a common ASCII format. The Data of the existing meters isavailable in the specified ASCII Format; details of which are enclosed at Annexure-II (Page1 to 3). A similar output in the same ASCII format (space delimited, fixedlength values) shall be made available from the new meters by the successfulbidder for future use of data for generation of BST & ABT Bills/Reports or any otherpurpose. In addition to this successful bidder shall make provision to supply loadsurvey data in Excel format as per Annexure-III.The supplier shall provide abovesoftware which would enable a local PC to:-

i) accept the data from the CMRI and/or from a interface device connected to theoptical port/RS-485 port and store it in its memory in binary read only format.

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

iii) Display the collected data on PCs screen on demand as per annexure-II & III intext format, 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 appropriatecommunication link to the central computer, starting from a certain date and time,as per operators instructions.

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.The software shall be suitable for the commonly available PCs and shall besupplied to owner in a compatible form to enable its easy loading into the PCsavailable at the various Sub-Stations/Energy Accounting Centre.

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

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. Heshall also 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 PCand the remote central computer) of the following form:

23 55 +16.28 56 +15.95 55 +15.32 54 +15.6655 +14.93 55 +14.26 54 +14.85 56 +15.17

HVPNL **** 12345.6 01234.5 00123.4 99-04-2857 +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 identificationcodes. They shall also be totally sealed and tamper proof, with no possibility ofadjustment at site except for a restricted clock correction.

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

27.0 The meter shall continue to function for remaining healthy phase(s), in case offailure of one or two phases of VT supply. In case of a complete VT supply failure,the computation of average frequency (as per 8.0) shall be done only for the periodduring which the VT supply was available in the 15-minute block. Any time blockcontraction or elongation for clock correction shall also be duly accounted for.

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

29.0 VOID

30.0 VOID

31.0 Every meter shall be indelibly marked with connection diagram showing the phasesequence for which it is intended and shall be attached on the meters. In case ofany special precautions need to be taken at the time of testing the meter, the sameshall be indicated along with the circuit diagram.

32.0 VOID

33.0 Sealing arrangement: Sealing arrangement for meters and TTBs shall be providedas under:

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 includingeach optical communication port.

34.0 The meters shall be supplied housed in compact and sturdy; metallic or mouldedcases of non-rusting construction and/or finish. The cases shall be designed forsimple mounting on a plane, vertical surface such as a control/relay panel front. Allterminals for CT and VT connections shall be arranged in a row along the meterslowerside. Terminals shall have a suitable construction with barriers and cover, toprovide a secure and safe connection of CTs and VTs leads through strandedcopper conductors of 4.0 sq. mm. size.

The meters shall also withstand without any damage or maloperation reasonablemechanical shocks, earthquake forces, ambient temperature variations, relativehumidity etc. They shall have an IP-51 category dust-tight construction, and shall becapable of satisfactory operation in an indoor, non-air conditioned installation.

The contractor shall be responsible for total installation and commissioning of themeters (alongwith test blocks, if supplied separately)as per Owners advice,including unpacking and inspection on receipt at site, mounting the meters onexisting control and relay panels at an appropriate viewing height., connection ofCT and VT circuits including any required rewiring (however, supply & installation of4cx4mm2 control cables from CT, VT to metering system are not in the scope of thisspecification), functional testing, commissioning and handing over. The Contractorspersonnel shall procure/carry the necessary tools, equipment, materials andconsumables (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 orIEC-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 metersfor compliance in both directions of power flow.

35.3 Acceptance Tests:

All equipment, after final assembly and before despatch from manufacturer's worksshall be duly tested as per IS 14697 for compliance in both directions of power flowin presence of purchaser's representative, unless dispensed with in writing by thepurchaser. 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 worksshall be duly tested to verify that they are suitable for supply to the purchaser. Inparticular, each and every DCD/MRI shall be subjected to the following acceptancetest:-

1. Functional checks2. Downloading Meter Data from the Meter(s).3. Compatibility with PC software4. Downloading the meter data on PC5. Functioning of advance and retard time commands.6. Per meter downloading time verification7. Capacity of DCD/MRI for data storage.

36.0 Quality Assurance

The quality control procedure to be adopted during installation of the specifiedequipment shall be mutually discussed and finalized in due course, generallybased on the established and proven practices.

37.0 Any meter, which fails to fully comply with the specification requirements, shall beliable to be rejected by the purchaser.

38.0 VOID

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

39.1.1 The prospective bidder shall be required to submit complete type test reportsfrom Govt. approved laboratory alongwith bid. The type test reports shall not bemore 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 CONDITIONSEquipment to be supplied against this specification shall be suitable forsatisfactory continuous operation under the following tropical conditions:-

i. Location IN THE STATE OF HARYANAii. Max. ambient air temp (0C) 50iii. Min. ambient air temp (0C) -2.5iv. Maximum Relative humidity (%) 100v. Minimum Relative humidity (%) 26vi. Average annual rainfall (mm) 900vii. Max. wind pressure (Kg/sq.m.) 195viii. Max. altitude above mean sea level

(meters)1000

ix. Isoceraunic level (days/year) 50x. Seismic level (horizontal acceleration) 0.3g

Note: Moderately hot and humid tropical climate conducive to rust and fungus growth. Theclimatic conditions are also prone to wide variations in ambient conditions. Smoke isalso present in the atmosphere. Heavy lightening also occur during June to October.

Annexure-I

GUARANTEED TECHNICAL PARTICULARS FOR THREE-PHASE FOUR WIRE CLASS0.2S ACCURACY POWER MONITORING SYSTEM.

1. Makers name and country2. Type of Meter/Model3. Standards to which the meter conform4. Accuracy class5. Parameters measured6. P.F. Range7. Overload capacity8. Variation of voltage at which system function normally9. Minimum starting current10. MD reset provisions11. Reset count12. No. of digits of display13. Particulars of readout by CMRI14. Non volatile memory retention time in absence of

power15. Memory capacity (kb)16. Demand integration period17. Pulse output for each meters18. Metrology indicator for each meters19. Communication capability on

a. Local portb. Remote port

20. Load survey parameters21. Power Consumption per phase

ii) 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 meter26. 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 dataFirst Row/*-- Header Information : Starting date & time and End date & time is defined

First rowStarting 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 RTCsynchronized, 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 RowSixth Row : Same as 4th RowSeventh Row : Same as 4th RowEighth Row : Same as 4th RowNinth 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.

/*-- 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 IPsrr 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

--*/

WEEK FROM 0000 HRS OF 28-06-05 TO 1224 HRS OF 01-08-05 0AP-M038-75 95736.5 02793.0 05701.7 28-06-05

00 18 +22.48 03 +22.19 11 +22.38 08 +22.44 11 +22.57 10 +23.03 14 +23.11 14 +23.23 22 +23.28 28 +23.29 35 +23.45 41 +23.48 44 +23.66 44 +23.68 45 +23.54 52+23.5404 46 +23.63 48 +23.99 42 +24.35 26 +24.75 44 +25.84 48 +26.40 46 +26.52 56 +23.32 69 +22.85 61 +21.83 55 +21.24 60 +24.44 65 +23.36 61 +20.22 60 +19.19 62+18.7208 64 +18.50 62 +18.51 63 +17.60 67 +15.19 63 +14.62 59 +15.63 59 +16.02 52 +16.65 39 +16.46 43 +15.18 64 +15.14 65 +15.29 52 +14.87 49 +13.21 50 +13.79 51+15.1912 48 +17.31 38 +18.39 43 +18.12 27 +18.23 54 +14.67 51 +16.20 56 * +03.30 51 * +00.03 47 +00.06 49 +00.03 25 +05.45 20 +10.40 29 * +04.08 30 * +04.11 18 +10.3528 +10.4516 65 +10.68 55 +07.22 59 +04.76 62 +04.43 65 +04.19 00 * +10.48 59 +20.77 60 +23.64 70 +21.06 65 +15.04 68 +13.45 56 +14.38 47 +15.50 40 +17.67 51 +22.55 25+25.2420 12 +27.56 19 +29.27 10 +29.96 13 +29.97 22 +29.61 09 +28.68 22 +27.72 18 +27.22 09 +26.55 12 +25.47 30 +25.02 23 +22.52 13 +24.89 13 +24.46 26 +24.59 04+23.77 1801.35AP-M038-75 97537.9 02804.6 06093.8 29-06-05

00 09 +23.64 11 +23.53 12 +23.35 07 +23.11 18 +23.20 29 +23.54 34 +23.76 38 +23.87 35 +23.97 31 +23.85 43 +23.90 51 +23.95 52 +24.10 55 +24.10 49 +23.95 59+24.2404 66 +24.77 57 +25.14 51 +25.75 45 +26.42 60 +27.94 63 +28.62 62 +28.75 56 +27.99 77 +23.31 78 +19.45 74 +19.25 67 +18.95 65 +13.97 72 +12.92 72 +13.11 74+13.0708 76 +13.07 70 +12.96 64 +12.97 66 +12.96 55 +12.81 49 +16.12 48 +16.78 48 +16.90 52 +17.72 51 +20.22 43 +17.60 51 +19.78 52 +21.48 57 +23.23 47 +26.32 35+27.0212 49 +27.45 42 +27.04 43 +27.03 45 +27.30 56 +27.72 54 +26.70 52 +26.24 51 +26.67 51 +26.93 41 +26.91 45 +25.73 44 +26.27 50 +26.58 40 +26.25 47 +26.17 57+26.5516 68 +26.87 52 +25.64 54 +23.94 47 +26.32 62 +17.90 59 +06.48 58 +13.01 65 +14.96 75 +17.25 70 +16.96 66 +17.82 64 +17.42 63 +19.26 51 +20.20 49 +23.48 54+25.2320 25 +28.96 08 +30.16 10 +30.31 05 +30.44 10 +28.50 28 +28.42 25 +28.15 16 +27.31 13 +26.43 22 +26.01 29 +25.47 21 +24.75 35 +25.16 30 +25.57 43 +25.50 48+25.30 2194.13AP-M038-75 99732.0 02849.2 06724.7 30-06-05

00 52 +25.10 58 +24.99 56 +24.70 60 +24.79 48 +24.66 62 +24.83 62 +24.75 60 +24.81 60 +24.72 62 +24.62 61 +24.48 67 +24.50 65 +24.46 56 +24.18 58 +24.26 51+24.1904 57 +24.28 66 +24.81 60 +25.25 45 +25.77 49 +26.19 53 +26.65 49 +26.50 45 +25.73 69 +22.24 61 +19.69 48 +18.96 47 +18.55 58 +14.72 58 +12.39 61 +12.53 55+12.6608 49 +12.34 42 +12.47 49 +12.53 56 +12.61 53 +12.52 47 +12.65 43 +12.54 51 +11.71 39 +11.96 52 +12.11 41 +12.16 33 +12.09 32 +16.05 27 +17.90 19 +18.12 13+18.3912 01 +18.48 00 +16.06 00 +15.48 03 +15.57 15 +15.67 29 +18.41 00 +25.66 14 +24.74 61 +24.23 43 +24.59 01 +24.20 20 +24.24 40 +24.17 48 +23.44 47 +23.43 26+22.5416 28 +22.65 28 +22.79 36 +22.97 23 +22.46 18 * +21.03 56 +20.23 24 +20.50 30 +20.20 59 +18.13 61 +19.79 63 +22.28 47 +22.83 52 +19.63 32 +21.87 11 +24.40 00+25.8020 00 +30.53 01 +12.91 12 +00.04 00 +10.45 03 +30.33 00 +31.96 10 +30.78 51 +19.79 33 +24.10 13 +27.75 19 +26.72 13 +24.58 38 +26.18 19 +25.82 30 +25.66 41+25.66 2010.84AP-M038-75 01742.8 02932.1 06980.9 01-07-05

00 22 +25.35 16 +25.54 31 +25.56 25 +25.25 35 +25.44 27 +25.58 29 +25.44 35 +25.39 47 +25.45 55 +25.59 55 +25.69 53 +21.36 56 +20.34 48 +20.40 49 +20.32 45 +20.3704 47 +20.63 37 +20.84 35 +21.15 27 +24.36 45 +28.17 47 +28.38 50 +28.29 47 +26.74 56 +21.27 44 +18.48 36 +19.28 42 +19.34 55 +16.68 51 +13.75 50 +13.67 51 +13.6108 62 +13.56 61 +13.63 51 +13.60 56 +13.60 31 +13.62 41 +13.85 46 +13.93 48 +13.72 42 +13.86 16 +13.71 18 +13.70 15 +13.48 00 +15.30 09 +23.83 02 +26.60 05 +26.9412 22 +28.59 17 +28.81 34 +30.73 15 +30.76 28 +30.88 16 +30.26 00 +29.53 09 +30.21 06 +30.50 01 +22.38 06 +22.74 08 +23.04 16 +23.66 13 +23.41 07 +23.06 03 * +22.0316 23 * +14.38 37 +16.67 39 +16.94 38 +07.42 63 +14.18 49 +16.78 36 +17.89 44 +17.89 60 +19.38 56 +23.89 34 +21.55 26 +21.29 07 +15.15 00 +11.78 00 +00.02 00 +02.2920 00 +22.83 00 +25.15 05 +24.43 00 +29.69 00 +32.39 16 +29.05 06 +14.03 00 +03.92 00 +21.73 04 +27.26 05 +27.31 00 +26.67 00 +27.61 00 +22.95 14 +26.95 24 +27.10 2031.80AP-M038-75 03774.7 03035.5 07267.9 02-07-05

- 34 -

Annexure III/* Header Information*/Meter Serial No.Load Survey Data From: 26/02/2010 To:01/04/2010

Date TimeSlotCoded

FrequencyNetWh

TimeRetard/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 0:452/26/2010 1:002/26/2010 1:152/26/2010 1:302/26/2010 1:452/26/2010 2:002/26/2010 2:152/26/2010 2:302/26/2010 2:452/26/2010 3:002/26/2010 3:152/26/2010 3:302/26/2010 3:452/26/2010 4:002/26/2010 4:152/26/2010 4:302/26/2010 4:452/26/2010 5:002/26/2010 5:152/26/2010 5:302/26/2010 5:452/26/2010 6:002/26/2010 6:152/26/2010 6:302/26/2010 6:452/26/2010 7:002/26/2010 7:152/26/2010 7:302/26/2010 7:452/26/2010 8:002/26/2010 8:152/26/2010 8:302/26/2010 8:452/26/2010 9:002/26/2010 9:152/26/2010 9:302/26/2010 9:452/26/2010 10:002/26/2010 10:152/26/2010 10:302/26/2010 10:452/26/2010 11:002/26/2010 11:15

- 35 -

2/26/2010 11:302/26/2010 11:452/26/2010 12:002/26/2010 12:152/26/2010 12:302/26/2010 12:452/26/2010 13:002/26/2010 13:152/26/2010 13:302/26/2010 13:452/26/2010 14:002/26/2010 14:152/26/2010 14:302/26/2010 14:452/26/2010 15:002/26/2010 15:152/26/2010 15:302/26/2010 15:452/26/2010 16:002/26/2010 16:152/26/2010 16:302/26/2010 16:452/26/2010 17:002/26/2010 17:152/26/2010 17:302/26/2010 17:452/26/2010 18:002/26/2010 18:152/26/2010 18:302/26/2010 18:452/26/2010 19:002/26/2010 19:152/26/2010 19:302/26/2010 19:452/26/2010 20:002/26/2010 20:152/26/2010 20:302/26/2010 20:452/26/2010 21:002/26/2010 21:152/26/2010 21:302/26/2010 21:452/26/2010 22:002/26/2010 22:152/26/2010 22:302/26/2010 22:452/26/2010 23:002/26/2010 23:152/26/2010 23:302/26/2010 23:45

- 36 -

2/26/2010 0:00Total

Date TimeSlotCoded

FrequencyNetWh

TimeRetard/Advance

PT Status Indicator(for low voltage

indication)2/27/2010 0:152/27/2010 0:302/27/2010 0:452/27/2010 1:002/27/2010 1:152/27/2010 1:302/27/2010 1:452/27/2010 2:002/27/2010 2:152/27/2010 2:302/27/2010 2:452/27/2010 3:002/27/2010 3:152/27/2010 3:302/27/2010 3:452/27/2010 4:002/27/2010 4:152/27/2010 4:302/27/2010 4:452/27/2010 5:002/27/2010 5:152/27/2010 5:30