REPAIR MAINT OF 11 0.433 KV TRANSFORMER AND 11 KV TRANSFORMER AND VCB AT AF STATION SURATGARH

Amount

BOQ (REPAIR/MAINT OF 11/0.433 KV TRANSFORMER AND 11 KV TRANSFORMER AND VCB AT AF STATION SURATGARH)

Disconnecting, opening of VCB (Make : Crompton/Megawin/Yamuna Denson/ABB Ltd) of any description and any make of rating 11 KV 400/800 Amps capacity for servicing / overhauling, taking out and removing unserviceable / defective parts including cleaning & servicing, greasing, oiling of the parts etc and replacement of unserviceable parts with new one, reassembling the VCB after overhauling/ servicing and its testing complete all a specified and directed. Note: (i) Replacement of unserviceable parts shall be measured and paid for separately under appropriate item of Sch 'A' as supply only but fixing charges of the parts replaced /repaired is deemed to be included in these item. (ii) Servicing shall be got carried out by the authorised rep of the VCB manufacturer and the service engineer will submit a service report for each VCB. (iii) Any item not included in CA and required for successful operation of the panel will be provided by the contractor & same shall deemed to be included rate quoted.

Supply only following items/spare parts suitable for 11KV VCB, 400/800 Amps capacity of (Make : Crompton/Megawin/Yamuna Denson/ABB Ltd) dismantled / fixed under Sch 'A' item No: 01 here-in-before complete all as specified and directed.

Vacuum Interrupter type WL-33379 suitable for 11 KV VCB Panel complete all as specified and directed .

Isolating contact assembly 400/800 Amps suitable for 11 KV VCB Panel complete all as specified and directed .

Tripping Coil assembly 30 Volts DC suitable for 11 KV VCB Panel complete all as specified and directed .

Close Coil assembly 30 Volts DC suitable for 11 KV VCB Panel complete all as specified and directed .

Motor & Gear assembly 110V AC and 220 AC suitable for 11 KV VCB Panel complete all as specified and directed .

TNC switch suitable for 11 KV VCB Panel complete all as specified and directed .

Indication lamp LED type suitable for 230 Volts AC 50Hz and 110/30 Volts DC supply complete all as specified and directed .

M & L for testing and calibration of 11KV VCBs (Make : Crompton/Megawin/Dension/ABB Ltd) indoor type alongwith control panel and control wiring, protection system and relays system (relay to tripping coil auxiliary switch male and female housing cut outs etc) , checking of quality of vacuum interrupter, insulation resistances, static contact resistance, Testing ( IR value, Ratio test, Polarity test) and connection verification of 11 KV Current transformer( Set of three) by PRIMARY INJECTION KIT ,and Testing and calibration of relay( set of two Over current and one earth fault) by SECONDARY INJECTION KIT including all other functional tests of the VCB, C&R panel and CTs, PTs. complete all as specefied and directed.

Supply install ,testing and commissioning of Micro processor base relay (02 O/C + 01 EF) for 11 KV VCB panel , rating 5 Amps, Auxiliary supply 20-110 Volt DC, complete all as specefied and directed by Engineer in Charge. Make: CG Model No: CGI14N or equivalent in ABB/ SIEMENS. Notes: (i) Necessary addition/ alteration to existing VCB front panel such as cutting/welding of front size of panel board/position if required including necessary modification of wiring shall be carried out at site by the contractor without any extra cost. (ii) The digital relay shall have following protections (a) Phase over current protection (b) earth fault protection (d) Over voltage (e) Breaker failure indication (f) Auxiliary power supply 24-110 V DC

Supply install ,testing and commissioning of Power pack unit input voltage 180-250 Voltage and out put voltage 24 Volt DC having 4-digit degital Volt & Ampere meter, High resolution D/A, A/D converter , Digital interface as standard function etc.including taking out unservicable battery bank unit, complete all as specefied and directed by Engineer in Charge.

Supply install ,testing and commissioning of Power pack unit input voltage 110 Voltage and out put voltage 24 Volt DC having 4-digit degital Volt & Ampere meter, High resolution D/A, A/D converter , Digital interface as standard function etc.including taking out unservicable battery bank unit, complete all as specefied and directed by Engineer in Charge.

Repair to distribution transformer step down 11/0.433 KV indoor/outdoor type of capacity up to 250 KVA, after dismantling the transformer carefully, opening the top cover of transformer for inspection /repair, draining out the transformer oil from the housing complete, taking out the core and winding by disconnecting the internal connections, removing the carbon/sludge deposit in transformer housing core, replacement of unserviceable rubber bushes and washers, replacement of tap changer winding and thimbles, replacement of silica gel, replacement of top cover gasket set including pasting with pasting material, replacement of worn out nut and bolts, replacement of unserviceable LT & HT bushes, cutting the burnt out winding and re-winding the same with suitable size of super enamelled copper/ aluminium wire as per existing guage, insulating the winding connection by using fire proof sleeve and fire proof tape, varnishing the coil, keeping the coils in electric oven chamber for 24 hrs to remove the moisture, painting of complete transformer body from outside and inside, marking of MES/SM Number etc, replacement of conservator tank glass, re-installing the core and winding inside properly, making the all connection with suitable copper lugs, filling of new transformer oil, reinstalling the top cover after cleaning and painting of housing, conservator tank, expulsion vent etc, Meggering the LT and HT side of the Transformer and testing complete all as specified and directed by Engineer-in-Charge. Note :- (i) Winding wire for making of coils, HT/LT bushes, new transformer oil will be measured & paid seperately (ii) Contractor is required to submit test report for repaired transformer duly signed by Engineer-in-Charge before installation.

All as per Srl item No 10 above but of capacity 11 / 0.433 KV, above 250 KVA upto 630 KVA complete all as directed.

Supply only brass terminal rod with nuts, bolts washers & bushings suitable for HT and LT side of the transformer of any make and capacity upto 100KVA complete.

All as per item No: 12 but capacity above 100 KVA and upto 250 KVA.

All as per item No: 12 but capacity above 250 KVA and upto 630 KVA.

Supply only super enamelled copper conductor wire of suitable gauge and size as per requirement for rewinding of 11/0.433 KV distribution transformer complete all as directed.

Supply only super enamelled aluminium conductor wire of suitable gauge and size as per requirement for rewinding of 11/0.433 KV distribution transformer complete all as directed.

Supply only tap changing switch suitable for operation on 11/0.433 KV distribution transformer with tappings on 2.5%, 5% and 7.5% on required basis for upto 630KVA capacity transformer.

Supply and filling transformer poweroil meeting IEC 60296-2003-11, 3rd edition standard specification and ASTMD 1275B test requirements for corrosive sulpher of BDV not less than 65 KV for filling in repaired transformer HT 11 KV.

M & L for filteration and dehydration of transformer oil by dehydration machine to achieve the die-electric strength/ insulation value upto 65 KV/40KV (RMS) at standard gap of electrodes 2.5 mm for one minute in various capacity of transformers 33/11KV and 11/0.433KV including insulation testing of oil with help of suitable equipments before and after dehydration including BDV Test compete all as specified and directed. Note: (i) Contractor will have to arrange the dehydration machine and transformer oil dielectric strength testing equipment as mentioned and same shall be deemed to be included in the item rate quoted. (ii) Test result of transformer oil before and after dehydartion is required to submit by contractor duly signed by all concerned. (iii) The contractor shall ensure that the conservator tanks are full to its level before commencement of dehydration process. (iv) Additional quantity of transformer oil if any required for making the oil level upto the requirement in transformer shall be measured and paid separately as supply and filling but its cost of heating shall be deemed to be included in the rate quoted for above item.

M & L for cleaning and preparation of steel surfaces of existing dull painting of transformer outdoor type including radiators, cooling ducts, vent pipes, condensor etc and applying two coats of synthetic enameled paint (heat resistant type) according to to IS colour code by spray machine including writing MES /SM No. in capital letters of suitable size on body for capacity upto 160KVA transformer outdoor/indoor complete all as specified and directed

All as per item No: 20 but capacity above 160 KVA and upto 630 KVA.

Dismantling and taking down by removing HT and LT connection of indoor/outdoor type 11/0.433KV transformer capacity 200 KVA to 630KVA from existing plateform / 4 Pole / 2 Pole structure, lowering the same carefully and shifting to other location within Air Force Station as directed by Engineer-in-Charge with and including reinstallation by any means of arrangement and testing complete all as specified and directed. Note: Installation of transformer, testing and connecting the both HT/LT cables, commisioning of transformer after checking voltage and loading at full load shall deemed to be included in quoted rates.

Contract Amount shall be derived after affecting the amount of Schedule of Credit in General Summary on serial page No 15 of tender documents.

M/s Rohit Construction Co.

SRI SAI CONSTRUCTION COMPANY