CA NO CWE BTD 53 of 2019-20 REPAIRS/ MAINTENANCE OF DISTRIBUTION TRANSFORMER AND CONNECTED WORK OF GE (U) BATHINDA AT BATHINDA MIL STN

Amount

Disconnecting HT/LT connections of burnt / defective copper / aluminum wound transformer of capacity varying from 25 KVA to 100 KVA, taking down from site of installation, opening up the top cover, draining out transformer oil from transformer in suitable containers (containers to be provided by the contractor ) inspection / assess the defective / burnt parts, core assembly of transformer in the presence of AGE / GE and prepare list and then shifting the transformer to trade / contractor's workshop for repair, cleaning and making good surface and rewinding the same with existing size of new copper / aluminum conductor, strip wound coils, limb for HT / LT , fixing of class 'E' insulation in core assembly etc. including internal cleaning, removing sludge, washing and painting with one coat of zinc chromate paint to inner side of the transformer body and one coat on outer side with synthetic enameled Grey paint (spray painting) after cleaning and removing oil spot from the body and re assembling, reinstalling, commissioning the transformer to its original place and testing at site on full load after connecting the HT / LT connections complete all as specified and directed by Engineer-in-Charge.

All as per srl item No. 1 above but capacity varying from 125 KVA to 200 KVA complete.

All as per srl item No. 1 above but capacity varying from 250 KVA to 315 KVA complete.

All as per srl item No. 1 above but capacity varying from 400 KVA to 500 KVA complete.

Notes for item No. 1.00 to 4.00:- (i) HT/LT copper/aluminum coil, transformer oil and other required parts as mentioned here-in-after shall be measured and paid separately under appropriate item of this BOQ. (ii) The T & P/ vehicles and minor parts/nut bolts etc. will be arranged by the contractor and the cost of same shall be deemed to be included in the quoted rates. (iii) The rates quoted is deemed to be included in the unit rate for cutting/chipping of RCC/PCC/plastering of foundation/platform and minor grill work/welding work. (iv) Unit rate quoted by the bidder shall include the shifting of transformer to workshop and bringing back to worksite.

Supply only new copper LT coils made out of proper size of DPC copper wire/strip super enameled of high quality matching with existing impedances and providing class 'E' insulation suitable for transformer 25 KVA to 630 KVA complete all as specified and directed by Engineer-in-Charge.

Supply only new copper HT coils made out of proper size of DPC copper wire/strip super enameled of high quality matching with existing impedances and providing class 'E' insulation suitable for transformer 25 KVA to 630 KVA complete all as specified and directed by Engineer-in-Charge.

Supply only new double paper covered aluminum strip/wire wound coils for LT winding of the transformer of capacity 25 KVA to 630 KVA with suitable size/gauge so as to match with existing working capacity of the transformer and all as per manufactures design/specifications including providing class 'E' insulation complete all as specified and directed by Engineer-in-Charge.

Supply only new double paper covered aluminum strip/wire wound coils for HT winding of the transformer of capacity 25 KVA to 630 KVA with suitable size/gauge so as to match with existing working capacity of the transformer and all as per manufactures design/specifications including providing class 'E' insulation complete all as specified and directed by Engineer-in-Charge.

Note for item Nos. 5.00 to 8.00:- (i) The rate quoted is deemed to be included in the unit rate for varnishing, sleeving and insulating materials and the Contractors shall not have any claim on this account at a later sage.

Disconnecting HT/LT connections of the pole mounted/plinth mounted outdoor type/indoor type transformer of capacity 25 KVA to 100 KVA, opening up the top cover for checking the conditions to carryout repairs at site, including draining out oil from the transformer in suitable container (containers to be provided by the contractor) and the transformer repair with replacement of parts (as required), check the lead connection from winding to bus rods including necessary soldering/jointing etc. and after complete repair refilling the dehydrated oil and testing on full load after connecting the HT/LT connections complete all as specified and directed by Engineer-in-Charge.

All as per srl item No. 9 above but capacity of transformer from 160 KVA to 200 KVA complete

All as per srl item No. 9 above but capacity of transformer from 250 KVA to 315 KVA complete

All as per srl item No. 9 above but capacity of transformer from 400 KVA to 750 KVA complete all as specified and directed by Engineer-in-Charge.

Notes for item Nos. 9.00 to 12.00:- (i) Major parts (as required) shall be measured and paid separately under appropriate item of this BOQ. (ii) Dehydrated transformer oil shall be measured and paid separately under appropriate item of this BOQ. (iii) The T & P and minor parts/nut bolts etc. shall be arranged by the contractor and the cost of the same shall deemed to be included in the quoted rates.

Taking out the unserviceable breather assembly complete from 100 kVA to 750 KVA transformer indoor/outdoor type and supply & fixing new breather assembly complete filled with fresh blue colored silica gel including connecting with proper rubberized gasket complete all as specified and directed by Engineer-in-Charge.

S & F new cork sheet gasket 6mm thick & 40mm width superior quality on top cover plate of the transformer capacity 25 KVA to 750 KVA complete all as specified and directed by Engineer-in-Charge.

S & F new silica gel complete all as specified and directed .

S & F in replacement LT bush assembly brass complete with double check nuts, washers and oil seal all accessories with bushing insulators for transformer capacity 25 KVA to 160 KVA complete .

S & F in replacement LT bush assembly brass complete with double check nuts, washers and oil seal all accessories with bushing insulators for transformer capacity 200 KVA to 315 KVA complete.

S & F in replacement LT bush assembly brass complete with double check nuts, washers and oil seal all accessories with bushing insulators for transformer capacity 400 KVA to 750 KVA complete.

S & F in replacement HT bush assembly brass complete with double check nuts, washers and oil seal all accessories with bushing insulators for transformer capacity 25 KVA to 160 KVA complete.

S & F in replacement HT bush assembly brass complete with double check nuts, washers and oil seal all accessories with bushing insulators for transformer capacity 200 KVA to 315 KVA complete.

S & F in replacement HT bush assembly brass complete with double check nuts, washers and oil seal all accessories with bushing insulators for transformer capacity 400 KVA to 750 KVA complete.

S & F in replacement HT/LT side cable box, cover plate made out of MS sheet of 14 SWG complete with MS nuts, bolts and washer suitable for indoor/outdoor type transformer capacity 25 KVA to 160 KVA complete all as specified and directed by Engineer-in-Charge.

S & F in replacement HT/LT side cable box, cover plate made out of MS sheet of 14 SWG complete with MS nuts, bolts and washer suitable for indoor/outdoor type transformer capacity 200 KVA to 630 KVA complete all as specified and directed by Engineer-in-Charge.

Supplying and filling new mineral grade transformer oil EHV type confirming to IS-3357 of 1983 for filling and for topping up in transformer/OCB's duly filtered with filtration plant to obtain high dielectric strength not less than 60 KV (Gap 2.5mm) complete all as specified and directed by Engineer-in-Charge. Note:- (i) Empty barrel will be property of contractor and same will be returned to contractor when barrel will be empty. (ii) Wastage of burnt oil shall be considered as 30% of total oil and 70% qty of total oil shall be considered in schedle of credit.

Dehydration & filtration of transformer oil with portable filtration cum dehydration machine to improve the dielectric strength not less than 40 KV within 1 minute with 2.5 mm gap at site of any installation in cantt area and any capacity / make of transformer installed on pole mounted, indoor/out door plinth mounted. Testing of dielectric strength of dehydrated transformer oil of each transformer will be carried out in the presence of Engineer-in-Charge complete all as specified and directed by Engineer-in-Charge. Note:- (i) Contractor shall ensure no wastage of transformer oil. (ii) Contractor shall ensure that the conservator tanks are full to its level before starting the dehydration.

Cleaning and preparation of old painted surface of transformer ( Exposed external surface only) installed at site of any installation in cantt area capacity 25 KVA to 160 KVA transformer installed on pole mounted , indoor / out door plinth mounted by using course cloth/wire brush and painting with one coat of synthetic enamel grey paint with the help of spray gun including writing the SM No/MES No. on transformer with white paint in the existing style/pattern complete all as specified and directed by Engineer-in-Charge.

All as per srl item No. 26 above but capacity of transformer from 200 KVA to 315 KVA complete.

All as per srl item No. 26 above but capacity of transformer from 400 KVA to 750 KVA complete .

Taking down transformer up to 500 KVA capacity from pole/site of installation of any description / any position and shifting to other site of installation distance up to 15 kilometer including fixing on 2/4 pole structure or on plinth and connecting with HT/LT side of existing system and testing complete all as specified and directed by Engineer-in-Charge. Note:- The T & P vehicles and minor parts/nut bolts etc. will be arranged by the contractor and the cost deemed to be included in the quoted rates.

M & L for earthing complete with galvanized iron or steel earth plate electrode of size 60 cm x 60cm x 6.0mm thick buried directly in ground, vertically to a depth not less than 2.25 mtr below normal ground level with top edge of earth plate at depth of not less than 1.5 mtr below normal ground level surounded from all sides with alternate layers of charcoal and common salt and connected to GI earth strip 32 x 6 mm thick by means of GI bolts, nuts washers & check nuts and soldering the strip, electrode connected to panel board or on poles or on transformer (including making of test point with GI strip of size 32 x 6 mm) including GI protection pipe 40 mm bore light grade dia for protection of strip upto the extent of 7.5 mtr all as directed, GI pipe light grade 20 mm bore for watering including providing funnel and wire mesh, GI frame with suitably reinforced RCC pit cover, PCC chamber pit with PCC (1:3:6) type C2 using 40 mm graded stone aggregates complete including excavation and earth work in any type of strata , all as specified and shown in electrical plate No 3 of SSR-2009 Part - I, PCC pit shall be provided at least 50 cm away from the earth pit and not just on earth pit including testing on completion and dismantling of old earthing. Note:- The rate quoted by the contractor shall be deemed to be included of earth strip 32x6mm and pit protection pipe 40mm dia light grade up to 7.5 mtr distance. Earth strip beyond 7.5 mtr will be measured and paid separately under relevant items.

M & L for earth continuity conductor or main earthing lead fixed to wall on batten or recessed or chases or buried in ground or drawn in conduit/ pipe for loop earthing etc. or any other indicated situation as required by using 32 x 6 mm GI strip complete.

swarn singh and co.

M/s NIRMAN BUILDERS

L H ENTERPRISES

R N Enterprises

Aman Enterprises