REPAIR/ MAINT/ SERVICING OF TRANSFORMERS, GODS, FUSE, LIGHTENING ARRESTORS AND CONNECTED WORKS AT DIGARU

Amount

Material and Labour for Cable jointing kit for 11 KV (Earthed) grade cable for indoor termination cold shrinkable type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 70 to 95 sqmm complete all as specified and directed .

Material and Labour for Cable jointing kit for 11 KV (Earthed) grade cable for indoor termination cold shrinkable type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 120 to 185 sqmm complete all as specified and directed .

Material and Labour for Cable jointing kit for 11 KV (Earthed) grade cable for out door termination cold shrinkable type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 70 to 95 sqmm complete all as specified and directed .

Material and Labour for Cable jointing kit for 11 KV (Earthed) grade cable for out door termination cold shrinkable type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 120 to 185 sqmm complete all as specified and directed .

Restringing of HT overhead line conductor of any size ACSR conductor after opening from insulators including winding on same insulator with proper size binding wire upto permissible sag including cutting, trimming and vending of branches along the HT line and removing of creepers from poles/conductors complete all as specified and as directed.

Dismantling air break gang operated switches vertical/horizontal mounted including insulators and operating mechanism for repair/ replacement of broken/worn out components and insulators etc. complete all as specified and as directed.

Supply, install, connecting, testing and commissioning HT 11 KV outdoor gang operated air break switch, triple pole for current rating upto 200 Amps, mechanically operated, mounted on insulators and steel frame, with operating mechanism and operating rod made out of 25 mm bore GI pipe medium grade worked from ground level, with locking arrangement, including drop out fuse complete all as specified and directed.

Repairing and servicing (oiling and greasing) of Gang operated switch 11KV vertical/horizontal mounted and replacing defective parts including replacement of unserviceable spare parts as required for smooth functioning of AB switch, testing for its proper operation complete all as directed. Note: Spares shall be measured and paid separately.

Supply only Male contact/ Moving contact Blade heavy duty high conductive metal cap 200/400 Amp 11KV complete.

Supply only Femal contact/Fix contact Jaw heavy duty high conductive metal cap 200/400 Amp 11KV complete

Supply only Tinned copper flexible jumper 200/400 Amps complete.

M&L for replacement of GI pipe medium grade, 25 mm dia suitable for operating rod of air break switch with smooth operation all as specified and directed.

Disconnecting and taking out worn out jumpers/ connectors of HT over head line / DO fuse unit in sub stations of any size or length after removing binding wire / connector and replacing with the new ACSR weasel conductor jumpers including PVC sleeve in colour coding R/Y/B of same size and length approx 1.5 m including new binding wire / connectors suitable for AB switch/ DO fuse unit, including providing mineral jelly all as specified and directed by Engr-in charge.

Supply, installing, testing and commissioning in repair HT lightening arrester expulsion type complete with all fittings discharging capacity 65 KA, 11000 volts grade complete all as specified and directed by Engr-in-Charge.

All as per serial item No 14 here-in-before but for 33 KV grade complete all as specified and directed by Engr-in-Charge.

S&F in repair Disc type insulator, porcelain, vitreous 145 mm high and 255 mm dia ball and socket type, white, brown or green, single disc assembly for tension with tension clamp for conductor, working pressure 11000 volts grade complete all as specified and directed by Engr-in-Charge.

S&F in repair Disc type insulator, porcelain, vitreous 145mm high and 255mm dia ball and socket type, white, brown or green, 'Two-in-series' assembly for tension with tension clamps for conductors, working pressure 11000 volts complete all as specified and directed by Engr-in-Charge.

S&F in replacement Pin type, porcelain, vitreous, white, brown or green insulator including one galvanised mild steel spindle, two galvanised iron washers and one galvanised iron nut, 150 mm height, 150 mm dia for 11000 volts grade complete.

Dismantling of ACSR conductor any size service feeder or distributor span from its existing position and keeping in safe custody the serviceable one for reuse complete all as directed.

Supply, stretching, fixing, testing and commissioning OH, ACSR conductor of any type / size on existing / new HT poles including fixing to insulators with binding wire complete all as specified and directed.

Fixing only ACSR conductor of any size complete all as directed. (Note: Serviceable ACSR conductor obtained from dismantling shall be reused)

Dismantling and taking out damaged/rusted cross arms, bracing supports clamps etc. complete all as directed.

Material and Labour for mild steel cross arms, bracing, supports, clamps and back plates fabricated from structural steel section conforming to Fe - 290 (Gde E-165) including nuts, bolts, washers, welding, bending cold or hot, drilling holes for bolts in any shape/size as directed including painting with two coats of synthetic enamel paint of approved colour over a coat of red oxide primer complete all as specified and as directed.

Dismantling and taking out damaged/rusted GI earth wire / cradle guard etc. complete all as directed.

Supply & fixing galvanized steel wire 4mm dia for earth conductor on HT poles including binding wire etc complete all as specified and as directed.

Supply & fixing galvanized steel wire 4mm dia for cradle guard on HT lines including necessery bending to required shape and binding wire etc complete all as specified and as directed.

Dismantling stay assembly complete as directed.

M&L for stay assembly with 20mm dia stay rod and all accessories as shown in electrical plate No 1 including loop type insulator, stay clamp, wire 7/4mm , complete all as specified and directed. Note:- Excavation /earth work and concrete work shall be measured and paid separately under relvant items.

S&F in repair Galvanised stay strand, 7/3.15mm complete all as specified and directed

S&F danger notice plate of 1.6 m thick mild steel sheet, vitreous enameled white with letter, figures and conventional skull & bones in signal red colour & fixed with MS clamps, bolts, nuts of approved size, for HT of size 25 x 20 cm, complete all as specified and as directed.

M&L for painting to 11 m HT steel pole with cross arms and clamps etc with two coats of aluminium paint after preparation of surfaces including pole numbering and marking alternate black and yellow strip of width 30 cm with fluorescent paint above 1.5 m from GL, complete all as directed by Engr-in charge.

Dehydration of HV/EHV grade transformer oil minimum three cycles to achieve dielectric strength not less than 40 KV for 1 minute with 2.5 mm gap as per IS-335-1983 for EHV grade including topping up with new transformer oil all as directed. Note:(i) Centrifuging machine with all T & P & testing machine of oil required for dehydration shall be arranged by the Contractor. (ii) Oil required for topping up the transformer shall be measured and paid separately.

Supply and replacement or topping up of transformer oil EHV as per IS 335 of 1983 Part II after dehydration and testing complete all as specified and directed.

Material and labour for disconnecting electrical connections of transformer of capacity 63 to 500 KVA of any make and any type, loading the transformer on heavy vehicle (open chassis) type from existing platform/ four pole structure by heavy crane long boom type suitable for shifting and loading transformer and transporting of transformer for repair at workshop at Guwahati city from AF Stn Digaru area including unloading of transformer from vehicle at workshop & opening up transfomer step down 11/0 433 KV by unscrewing all nuts/bolts and washers of top cover duly draining out complete transfomer oil and kept aside for re-use. Disconnecting of all HT/LT wiring tap changer, complete LT/HTbushing, air breather etc and kept aside for re-use the serviceable parts and removal of unserviceable parts and taking out complete core assembly of transfomer with help of chain pully to carry out the following works :- (a) Deslurring of transformer tank by taking out the complete deposited transformer oil sludge and cleaning thoroughly the transformer tank by washing & wiping out all dirt/rust accomolated including making preparation of old painted internal/external surfaces of transformer. Painting the internal surfaces of transformer with two coats of high grade anticorrosive varnishing paint over a coat of rex oxide primer. Painting to external surfaces of transformer with two coats of Ist grade synthetic enamelled paint over a coat of red oxide primer, all as shown and directed by Engr-in-charge. (b) Cleaning the transformer core assembly using electrc blower and making the core free from sludge, dirt and any other foreign materials from its surfaces including provision of high grade insulation varnish and raising insulatin of the core through heat chamber and raising of IR valve /LV-E>500 Mega ohms HV-E>1000 Mega ohms. (c) Assembling the transformer complete including supply of complete set including replacement of defective accessories such as oil seal, gasket, LT/HT bushing, stud, air breather, tap changer, including making necessary LT/HT wiring as dismantled (New spares as required will be measured and paid separately under relavent items, rate of oil seal and gasket will be deemed inlcuding in the quoted rate). Powering of dehydration/filtered transformer oil (dehydration charges will be measured and paid separately) as obtained during dismantling and top up balance quantum with new transformer oil as required (New transformer oil will be measured and paid under relavent item) after successfuly repairing the transformer reloading the same and place to its original location and installation complete including making LT/HT side cable connection, earth connection and testing complete. Note :- Contractor shall arrange same capacity transformer to provide continuous electric supply at no extra cost to the department.

Supply and fixing in repair copper strip/wire/rod as per existing gauge/size complete all as specified and directed.

Supply only HV bushing of transformer with brass metal connecting rod, nut bolt and washer, suitable for 63 KVA to 500 KVA capacity of transformer, 11000 Volt as per IS 3347/1967 complete all as specified and directed.

Supply only LV bushing of transformer with brass metal connecting rod, nut bolt and washer, suitable for 63 KVA to 500 KVA capacity of transformer, 1100 Volt as per IS 3347/1967 complete all as specified and directed.

Supply & replacement of silica gel crystal for any type and capacity of transformer all as specified and directed.

S&F in repair Silica gel breather assembly complete with silica gel crystal complete for the transformer of capacity 100 KVA to 1000 KVA all as specified and directed.

M/s Ravi Enterprise

M/S. SUBHAS CONSTRUCTION CO.