REPAIR/MAINT OF EXTERNAL ELECTRIFICATION SERVICES UNDER GE (EAST) FEROZEPUR CANTT

Amount

Taking down of the UNSV/ defective transformers of capacity 400 KVA and above (out door/Indoor type) from the existing site located in cantt area after disconnecting the in/out connection, transporting the transformers to workshop/factory for repairs,testing and transporting the same back after repairs and installing on plinth or hoisting of transformers on two/four pole structure at height not less than 3 metre, making all electric connections with HT/LT side jumpers and leads including earth connections etc and testing, complete all as specified and directed.

All as per item No 01 here-in-before but 150 KVA to 315 KVA. Notes : for items 1 & 2 above :- (a) Oil container for collecting old transformer oil will be arranged by the contractor. (b) T&P such as chain pulley ,crane for loading, unloading ,trasporting and for installing and hoisting shall also be arranged by the contractor.

M & L for opening the top of defective transformer of any make and capacity 400 KVA and above, removing gasket and lifting up the core assembly carefully to check the condition of transformer for repairs, dismantling core lamination to the extent required for taking out defective/ unserviceable coil for check after disconnecting all connections and re-assembling of core lamination to original position after positioning of existing serviceable coil alongwith new coils carefully to check the condition of transformer to ascertain the repairs/replacement of items for repair including cleaning the tank, removing sludge, dirt cleaning the coils of limbs, re-fixing the core assembly and reassembling of transformer after repairs including zinc chromate paint inside , replacement of nuts bolts, thimbles etc and connections with aluminium strip and including welding, denting etc and testing the transformer at factory/workshop .

All as per item No 03 here-in-before but 150 KVA to 315 KVA. Notes : for items 3 & 4 above :- (a) The payments of new coils and other parts to be replaced shall be made as supply only under items here-in-before, cost of fixing these items is included in item No 3 &4 (b) Cost of dehydration of transformer oil is not included under these items.

Supply only HT/LT coil isulated DPC/ TPC copper winding wire of existing size (gauge), grade and in weight complete with insulating material for transformers of different capacities 150 KVA and above , complete all as directed and as specified. NOTE : Fixing charges of formed coil included in unit rate under Item 3 & 4 above

Supply & fix in replacement of HT brass spindles including, heat resistance gasket, nuts, bolts, washers for transformers of capacity 400 KVA and above as per existing type, dia and length complete all as directed and as specified.

All as per item No 6 here-in-before but for transformers of capacity 150 KVA to 315 KVA .

Supply & fix in replacement of HT porcelain bushing for transformers of capacity 150 KVA to 500KVA complete all as directed and as specified.

Supply & fix in replacement of LT brass spindle including heat resistance gasket, nuts, bolts, washers for transformers of capacity 400 KVA and above complete all as directed and as specified.

All as per item No 9 here-in-before but for transformers of capacity 150 KVA to 315 KVA .

Supply & fix in replacement of LT porcelain bushing for transformers of capacity 150 KVA to 500 KVA complete all as directed and as specified.

Supply & fix silica gel breathers assembly filled with silica gel complete for transformers of capacity 150 KVA and above complete all as directed and as specified.

M&L for replacement of silica gel in existing breather asembly with fresh silica gel of transformers of high quality as recommendation all as specified and directed.

Cleaning sprinkled transformer oil, grease and all other foreign materials from external surfaces of transformers of capacity 150 KVA to 315 KVA and preparing the surface to receive paint and applying one coat of synthetic enamel paint (spray painting) after disconnecting all the electrical connections including writing MES number and SM number with white paint over black base in letters not less than 10 cms in height complete all as specified and as directed.NOTE :- Painting shall be carried out at site.

All as per item No 14 here in before but transformers of 400 KVA and above capacity.

Supply only CRGO silicon core as per existing thickness, size & design for transformers of different capacities as per recommendation and sample as per existing complete all as specified.

Opening the top of existing transformer at site of any make and capacity (at site) 100 KVA and above, drainage of oil, stopage of leakage ,change of gasket, oil rings, nuts, bolts & washers ,carefully re-fixing/refilling oil including replacement of gasket, oil rings, nuts bolts and washer complete all as directed and as specified.

Shifting of UNSV/Serviceable transformers of capacity 75 KVA to 250 KVA (out door/Indoor type) from one location to other like MES Yard to Transformer site and vice versa in cantt area after disconnecting the in/out connection with the help of crane and carrying vehicle and installing on plinth or hoisting of transformers on two/four pole structure at height not less than 3 metre, making all electric connections with HT/LT side jumpers and leads including earth connections etc and testing, complete all as specified and directed.

Shifting of UNSV/Serviceable transformers of capacity 315 KVA to 500 KVA (out door/Indoor type) from one location to other like MES Yard to Transformer site and vice versa in cantt area after disconnecting the in/out connection with the help of crane and carrying vehicle and installing on plinth or hoisting of transformers on two/four pole structure at height not less than 3 metre, making all electric connections with HT/LT side jumpers and leads including earth connections etc and testing, complete all as specified and directed.

Earthing complete with galvanised steel earth plate electrode 60 cm x60 cm x 6.3 mm thick buried directly in ground ,(Earth pit not less than 2.25 meter deep below ground level) with top edge of plate not less than 1.5 meter below normal ground level , earth plate surrounded by 15cm thick and packed with layers of charcoal dust and common salt , earth plate connected to and including galvanised iron earth strip 32 X 6 mm by means of nut, bolts, check nuts and washers of galvanised iron or steel and thimble and the other end of GI earth strip is connected to main switch board and protected by light grade GI pipe of 40 mm bore. provision of 20mm bore light grade GI pipe for watering including GI funnel and wire mesh. Pipe shall be provided vertically upto top level of earth pit and then taken horrizontally to the earth pit. Cement concrete chamber of PCC ( 1:3:6 ) type C-2 using 40 mm graded stone aggregate.The chamber shall be constructed one metre away from edge of earth pit. 50 mm thick pre cast cover of cement conrete (1:2:4) type B-1 using 20 mm graded stone aggregate and MS angle iron 50 x 50 x 6 mm frame including two coats of painting over a red oxide to exposed steel surfaces. excavation in soft / loose soil, returning filling and removal of surplus soil to a distance of 50 mm as directed and shown in Electrical Plate No- 3 of SSR Part-1 (2009)

M & L for plain cement concrete (1:4:8) type D-2 using 40mm graded stone aggregate as in foundation fillings and mass concrete for poles including necessary form work and finished the surface complete all as specified and directed by Engr in charge. ( For plinth foundation of power transormers) all as specified and directed at site.

Supply and spreading 40 mm graded stone aggrgate in substation yard including taking out of old grass and cleaning the area before spreading of crushed stone complete all as specified and directed.

Material & labour for single pointed air termination aluminium rod 12mm dia, 300 mm long, complete all as specified and directed.

Material & labour for aluminium strip 25mm x 3.15 mm with saddle and fixing screw with Busbar insulators etc roof conductors and down conductors above ground level, complete all as specified.

Material & labour for aluminium strip 32mm x 6 mm with saddle and fixing screw with Busbar insulators etc for earthing of power transformers, complete all as specified.

M&L for Brick work with sub class 'B' bricks straight or curved on plan exc 6m mean radius built in cement mortar 1:4 complete all as specified and directed.

M&L 15mm thick rendereing in cement mortar 1:4 on brick/concrete surfaces finished even and smooth surfaces without using extra cement complete all as specified ( For plinth foundation of power transormers)

Cleaning of 66 KV Grid/ yard all angle iron chanels,insulators of 66 KV, CT/PT/LA etc by air compressor removing the oil, grease and all other foreign materials from external surfaces and Scrabing the old paint by wire brush and emery paper on existing steel structure for LA, Isolators,Operating switches, Earthing structure and preparing the surface to applying of two coat of aluminium paint (spay painting) and greasing and repair to isolators blades to be function properly complete all as specified and directed . Note :- Before quoting the rates the contractor shall visit 66 KV Main Receiving Station .

M& L for Sand cushioning to under ground cable in trenches/existing cable trenches/ducts /transformer base of transformers complete all as specified and directed .

M & L for precast cement concrete solid building blocks or slabs 7.5 cm thick (with plain or interlocking joints as directed) type B-1, 1:2:4 (20 mm graded stone aggregate) set in cement mortar 1:4 complete all as specified and directed .

M & L for Mild steel bars 10mm dia (Fe-410-W (Gde.E-250) quality-A or Fe 290 (Gde - E-165) and over, cut to length, bent to shape required, including cranking, bending spirally for hooping for columns, hooking ends and binding with and including mild steel wire (annealed) not less than 0.9 mm dia or securing with clips all as directed.

Repair to OLTC Type-FR16, Steps-16 ) of 66/11 KV transformer installed at 66 KV Sub station consisting of following :- (a) Draining out of oil from OLTC assy complete and cleaning by flushing out with fresh transformer oil (b) M & L for opening of top cover of OLTC after disconnecting tripping coil connection, Buchholz relay and control panel connection for repair (c) Replacement of all the gaskets sets/seals/packing of defective parts to stop the leakage. (d) Fixing of different gauges with proper fasterners, screws and other specific material required at site as per existing . . (e) Opening of conservator,draining out dirty oil removing of sludge and refixing the same.

Cleaning of sprinkled transformer oil, grease and all other foreign materials from external surfaces of transformers of capacity 05 MVA with SF-6 and exhaust fan of transformer preparing the surface to receive paint and applying one coat of synthetic enamel paint (spay painting) including writing MES number and SM number with white paint over black base complete all as specified and as directed. NOTE :- Painting shall be carried out at 66 KV sub station .

(a) M&L for Dehydration/filtration of transformers oil of existing transformers (11/0.433 KV, out door/Indoor, step up/step down), at site by means of oil dehydration machine having arrangement for heating to remove the moisture silt/sludge and wastage removing arrangement etc to make the oil fit for use in accordance with IS-1886 to achieve minimum dielectric strength of 60 KV by continuous process of dehydration complete including testing all as directed and as specified. (Testing machine shall be arranged by the contactor) (b) For dehydration (filteration ) of transformer oil with high vaccum low temperature purification plant ,removal of foregin particle,unwanted dissolved gaseous and moisture to improve the dielectric strength upto 70 KV at 2.5 mm gap. ( for 66/11 KV transformer) . Notes for a & b :- (i) For power transformer oil should have minimum dielectric strength of 70 KV as per IS 335 (EHV) ( for 66/11 KV transformer) . (ii) For distribution transformer oil should have minimum dielectric strength of 60 KV as per IS 1886 (HV) ( for 11/.433 KV transformer) . (iii) Electricity for running dehydration machine & testing, shall be provided by the department free of cost. (iv) Any damage caused to transformer during dehydration/filtration shall be responsibility of the contactor.

M&L for Top up with fresh transformer oil in transformers in-situ and for newly rewinded transformer after filtration/dehydration with minimum dielectric strength of 60 KV complete all as directed and as specified. M&L for Supply and pouring of New Transformer oil for Power Transformer for top up purpose all as specified and directed. Note: (i) For power transformer oil should have minimum dielectric strength of 70 KV as per IS 335 (EHV) ( for 66/11 KV transformer) . (ii) For distribution transformer oil should have minimum dielectric strength of 60 KV as per IS 1886 (HV) ( for 11/.433 KV transformer) .

M&L for lightning arresterss expulsion type suitable for 66 KV complete with all fittings, transmission class, discharge capacity 65 Kilo amp complete all as specified and directed.

Supply and fix in replacement relay provided on HT 11KV panel board for incoming & out going feeders in 66 KV MRS & other installation for healthy tripping for over current & earth fault (ASHIDA Numerical OC/EF Protection Relay), Aux supply 18-250 VAC /DC and CT 1/5A complete all as directed and specified. Make: ASHIDA type ADR 141C or equivalent of Siemens/ L&T/ Zenith/ Schneider.

S & F in repair Current transformer (cast resin) suitable for differential Relay at HT 11 KV Incoming feeder 900/450/.577 Amps,three Nos, single phase double core CT of accuracy class. 1.0 and 15 VA, for metering and 15 VA,CL 5P 10 for protection with STR (short time rating ) of 18.4 KA for 1 sec,Make-AE or equivalent make specified in particular specification.

S& F in repair Weather proof Power control cable, Copper Conductor ,24 Core 2.5 Sqmm, PVC insulated and sheathed cable ,Suitable for main incommer 66 KV to control panel of 66/11 KV control panel complete all as specified and directed.

M&L for for inspecting repair, testing and commissioning of relay and control panel complete with New internal wiring of differential CTs , IDMT relay, Master relay, Differential relay and other miscelleneous relays including proper ckt of internal wiring with material / pvc wiring required as per existing specifications atsite for making all the relays proper functional all as specified and directed.

S&F in replacement of annunciator for control and relay panel of TR -03 with New control wiring as per existing make and model at 66 kV MRS complete all as specified. Note : contractor has to submit the test report for functional servicabilty of the equipment after insatllation.

M&L for repair to SF6 circuit breaker machanism system with Testing /Replacement of relay , contractor and internal wiring etc reqd for proper functioning of mechanism insatlled at of 66 KV MRS complete all as specified.

Bains Enterprises

Northern cable fault locatoers