REPAIR/MAINT OF TRANSFORMERS AND ITS ALLIED WORKS AT DEAL AND IRDE UNDER GE(I) RND DEHRADUN

Amount

Disconnecting defective transformer indoor/outdoor of any capacity up to 630 KVA both from HT/LT sides, and then drainage of complete transformer oil. Opening of top cover with due care and removal of all HT/LT winding connections from bushing and then lifting of core by means of tripod and chain pulley with due care for inspection and ascertain it’s serviceability state after keeping it aside. Removal of all sludge and unwanted material from tank and core, lowering of core assembly after carrying out required repairs to the winding and core. In case the repairs which are not possible at site then the transformer has to be taken to the work shop for repairs complete, all as specified and directed by Engineer-in-Charge. Note :- (i)The cost of transportation shall be paid separately. (ii)The cost of rewinding shall be paid separately.

Taking down of transformers of capacity 63 to 630KVA from transformer plate/2/4 pole structure form with due care after disconnecting all HT/LT connections on pole and then lowering it by means of tripod and chainpully and remounting on transformer plate form plate/2/4 pole structure after repairs all as directed and specified by Engineer-in-Charge.

Lifting of Indoor/Outdoor transformer from PCC plateform/2/4 pole structure of concerned substation with the help of mobile crane , loading on truck for transporting to civil workshop at Dehradun city & unloading at workshop, transporting back from workshop after repairs to its existing location complete all as specified and directed by by Engineer-in-Charge

Material and labour for replacement of worn out HT copper coils made out of super enamelled insulated copper wire all as per existing size and shape including all insulating, binding, varnishing and baking if required complete all as specified and directed by Engineer-in-Charge.

Material and labour for replacement of worn out LT copper coils made out of super enamelled insulated copper strip all as per existing size and shape including all insulating, binding, varnishing and baking if required complete all as specified and directed by Engineer-in-Charge.

Re-conditioning of existing HT/ LT copper coils made out of super enamelled insulated copper strip/ wire by providing insulating, binding, varnishing and baking if required complete all as specified and directed by Engineer-in-Charge.

Material and labour for replacement of worn out bushing rod made out of copper with heavy duty double nuts and one washer at both ends suitable for HT side all as exiting size, shape and length complete, all as specified and directed by Engineer-in-Charge suitable for following capacity transformers ;-

63-200 KVA Transformers.

250-630KVA Transformers.

Material and labour for replacement of worn out bushing rod made out of copper with heavy duty double nuts and one washer at both ends suitable for LT side all as exiting size, shape and length complete, all as specified and directed by Engineer-in-Charge suitable for following capacity transformers ;-

63-200 KVA Transformers.

250-630 KVA Transformers.

Material and labour for replacement of worn out porcelain bushing for 11KV HT side indoor /outdoor transformers with rubberised cork sheet washers all as required at site complete, all as directed and specified by Engineer-in-Charge suitable for following capacity transformers:-

63 KVA - 200 KVA Transformers.

250-630 KVA Transformers.

Material and labour for replacement of worn out porcelain bushing for 0.433 KV LT side indoor /outdoor transformers with rubberised cork sheet washers all as required at site and as directed by Engineer-in-Charge suitable for following capacity transformers:-

63 KVA - 200 KVA Transformers.

250-630 KVA Transformers.

Material and labour for replacement of worn out off load tap changer all as per existing sample complete, all as specified and directed by Engineer-in-Charge suitable for following capacity of transformers of any make.:-

63-200 KVA Transformers.

250-630 KVA Transformers.

Material and labour for replacement of UNSV oil temperature gauge /thermometer suitable for transformers all as per existing shape and size for any make and model transformers complete, all as specified and directed by Engineer-in-Charge.

Material and labour for replacement of worn out neoprene rubberised cork sheet 4 mm thick for transformer top cover all as required at site and as directed by Engineer-in-Charge suitable for following capacity transformers:-

63-200 KVA Transformers.

250-630 KVA Transformers.

Material and labour for replacement of worn out neoprene rubberised cork washer mm thick suitable for HT/LT side bushing of off sizes all as required at site and directed by Engineer-in-Charge.

Material and labour for replacement of UNSV silica gel breather assembly of any description/capacity and supply & fixing new breather assembly transparent body suitable for 11/0.433 KV transformers of capacity upto 100 KVA complete, all as specified and directed by Engineer-in-charge.

All as per item No 20 above but transformer of capacity above 100 KVA but upto 315 KVA –ditto-

All as per item No 20 above but transformer of capacity above 315 KVA but upto 500 KVA –ditto-

All as per item No 20 above but transformer of capacity above 500 KVA but upto 630 KVA –ditto-

Dehydration/centrifuging of transformer oil by means centrifuging machine electrically operated at site of installation of transformer in running condition of transformer including testing of transformer oil before and after centrifuging from top and bottom of transformer at 4mm gap the BDV should be 40KV complete, all as specified and directed by Engineer-in-Charge.

Supply and topping up of transformer oil of dielectric strength of 60 BDV complete, all as specified and directed by Engineer-in-Charge.

Preparation of old surface of transformer for painting externally including fins/radiators removal of all rust/oil/grease and unwanted material and then two coats of synthetic enamel metallic paint by means of spray gun at site of installation of transformer complete, all as specified and directed by Engineer-in-Charge suitable for following capacity of transformers:-

63-200 KVA Transformers.

250-630 KVA Transformers.

S& F in replacement of UNSV alluminium lugs after cutting the worn out /faulty cable end from HT/LT side of Transformer /LT pillar/panel box including necessary earth work for taking out the cable from loop retuning, filling & making cable lead by providing aluminium lugs lead including crimping with crimping tools in the existing LT cable including necessary connection complete etc, all as specified and directed by Engineer-in-Charge.

Up to 50 Sq mm

From 70 Sq mm to 120 Sq mm

From 150 to 185 Sq mm

From 240 to 300 Sq mm

Material, labour,testinf and commisssioning Chemical Earthing with copper pipe electrode 3.0 M long having outer pipe dia 50mm & inner pipe dia 44mm duly filled with highly conductive and anti corrosive compound of required quantity having chemical compostion Bentonite 40%, copper sulphate 20%, Gypsom 5%, Graphite 10%, Alum 5%, Zinc sulphate 10%, Aluminium sulphate 10% buried in ground by digging a bore of 150mm dia surrounded by soil friendly backfill compound non soluble in water including connection with Copper earth strip 20x3mm upto 7 meter length, making PCC pit of size 0.3mx0.3mx0.3m (inner size) in mix 1:3:6 type CI with RCC 1:2:4 type B-1, 40mm thick cover reinforced with 6mm dia MS bars 3 Nos both ways with lifting hook made out of 8mm dia bar and testing on completion to acheive value not more than 0.5 ohm complete all as specified and directed by Engineer-in Charge

Material and labour eathing continuity conductor to wall on batten or buried in ground or drawn in conduit or fixed to pole or any other indicated situation for loop earthing etc, as required 20x3 mm dia copper strip complete, all as specified and directed by Engr-in-Charge.

Dismantling & taking out unserviceable steel & iron items from poles and Supply & fixing cross arms, bracing, supports, clamps and back plates fabricated from structural steel sections including nuts & bolts , washers , welding bending cold or hot , drilling holes for bolts in any shape or size as indicated or directed and inclusive of two coats of aluminium paint over a coat of red oxide primer complete all as specified and directed by Engineer-in-Charge.

Material and labour for replacement of unserviceable Silica gel crystel for transformer of best quality, all as specified & directed by Engr-in-charge. .

shivrefrigeration

Ravi Electrical

TRINITY CONSTRUCTION

BK CONSTRUCTION