REPAIR/MAINTENANCE OF TRANSFORMERS AND ITS ALLIED WORKS AT DEAL 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 form mounted /2/4 pole structure form with due care after disconnecting all HT/LT connections on pole/ plate form and then lowering it by means of mobile crane/tripod and chainpully and remounting on transformer plate form mounted /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 washer4 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 breather assembly with silica gel 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 15 above but transformer of capacity above 100 KVA but upto 315 KVA –ditto-

All as per item No 15 above but transformer of capacity above 315 KVA but upto 500 KVA –ditto-

All as per item No 15 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. .

Excavation in trenches in any type of soil not exceeding 1.5 metre deep and not exceeding 1.5 mtr width and getting out soil including forming bottom surface to required slope/gradient for laying cables/pipes etc. all as specified and directed by Engineer-in-Charge including removing cable protection covers/ bricks & stacking serviceable bricks for reuse and disposal of unserviceable covers within 50 m all as directed. Note : (i) Excavation shall be made carefully in order to avoid damage of existing cables and brick protection. (ii) The excavation work may be carried out in short lengths for locating fault in under ground cables at different locations

M&L for Returning, filling in including spreading, leveling, watering and well ramming in layers of 25 cm thick after the cables etc. are laid, jointed and tested complete all as specified and directed by Engineer-in-Charge.

M&L for Removal of surplus excavated soils not exceeding 50 Mtr distance and depositing where directed by Engineer-in-Charge at a level not exceeding 1.5 m above the starting point complete all as specified.

Material & labour for sand filling with clean dry find sand unwashed including gently punning around cables in trenches/ducts for cable protection complete all as specified and directed by Engineer-in-Charge.

M&L for old size sub class `B` bricks, kiln burnt, as in cable protection laid flat with axis of brick perpendicular to the axis of the cable complete all as specified and directed by Engineer-in-Charge.

Fixing / laying only old bricks of any description as obtained from dismantling of the cable complete all as specified and directed by the Engineer-in-Charge.

Supplying, laying & jointing in replacement of UNSV GI water tubing, 80 mm bore, medium grade as in sleeving etc laid in trenches / ducts etc. complete all as specified and directed by Engineer-in-Charge.(MAKE : TATA/JINDAL/TT SWASTIK)

Supplying, laying & jointing in replacement of UNSVGI water tubing, 50 mm bore, medium grade as in sleeving etc laid in trenches / ducts etc. complete all as specified and directed by Engineer-in-Charge.(MAKE : TATA/JINDAL/TT SWASTIK)

Material & labour in replacement of PCC 1:3:6 type C-2 using 20 mm graded stone aggregate. in mass concrete and filling complete for foundation/hard standing , all as specified & directed by Enge-in- Charge

Supplying, Laying, testing and commissioning in replacement of UNSV XLPE insulated,IS 7098 (Part-I)-1988 marked screened, PVC bedded, galvanized steel strip or wire armoured, electric power cables (heavy duty) with aluminium conductor 1100V grade cross section area of the under mentioned size of cables laid in trenches/fixed on pole/wall / passed through pipe including making necessary connection, with busbar/MCCB/DB's & testing complete, all as specified and directed by Engineer-in-Charge. (NOTE: Earth work, sand cushioning, pipe, clamps for holding cables and brick protection shall be measured and paid separately )

70 Sqmm 3½ core

95 Sqmm 3½ core

120 Sqmm 3½ core

150 Sqmm 3½ core

185 Sqmm 3½ core

Re-laying LT cable Obtained form Item No 27( Any size)

Balraj and Co

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