CWE/KAS-83/2026-2027 REPAIR / MAINT OF HT ELECTRIC INSTALLATIONS, HT CABLES, DISTRIBUTION TRANFORMERS AND OTHER CONNECTED ITEMS AT SOLAN MIL STN UNDER GE KASAULI.

Step down outdoor/indoor transformer 11/0.433 KV (400-750 kVA) by disconnecting HT/LT terminals, decanning transformer oil, removing sludge, cleaning of HT/LT bushings to remove dust particles/dirt etc., cleaning the core and winding with compressed air and re-assembly complete, including replacement of copper windings, copper washers, rubber bushes of HT/LT bushings, replacement of 6 mm thick cork sheet suitable for transformer top cover and terminal boxes, refilling the transformer oil and topping up with new transformer oil and centrifuging to achieve dielectric strength up to 60 KV, painting with two coats of synthetic enamel paint over a coat of red oxide primer after preparation of painted surfaces of transformer, and testing and pre commissioning on load etc. complete for transformers of the following rating: (Dehydration of transformer oil by filtration and topping up of transformer oil shall be measured and paid separately as supply only under respective items.) Note: SM MES No. 143/3333/TR/16.

All as per serial item No 01 here-in-before but capacity of transformer 100 KVA to 250 KVA. Note - SM MES No-143/3332/TR/16, SM No. – 143226 MES No- L-23395K

M & L for disconnecting electrical connections of transformer of capacity 400 to 750 KVA of any make & 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 / rewinding at workshop at Dharampur from Solan Stn Area including unloading of transformer from vehicle at workshop & Opening up transformer step down 11/0.433 KV by unscrewing all nuts/bolts and washers of top cover duly draining out complete transformer oil and kept aside for re-use. Disconnecting of all HT/LT wiring tap changer, complete LT/HT bushing, air breather etc and kept aside for re-use the serviceable parts and removal of unserviceable parts and taking out complete core assembly of transformer with help of chain pully to carry out the following works:- Filtration & Dehydration of transformer oil using ON-LINE filtration plant to achieve dielectric strength minimum 60 KV/ 2.5mm etc. complete all as specified and directed.

(b) Cleaning the transformer core assembly using electric 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 insulation 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 & paid separately under relavent items, rate of oil seal & gasket will be deemed included 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 & paid under relavent item) after successfully repairing the transformer reloading the same & place to its original location and installation complete including making LT/HT side cable connection, earth connection and testing complete.

All as per item No. 03 above but capacity of transformer 100 KVA to 250 KVA.

M & L for replacement of worn out copper strip/ wire /rod as per existing gauge/size all as specified and directed.

Supply and Fixing HV Bushing of transformer with Brass metal connecting rod, nut bolt and washer,suitable for 400 KVA to 750 KVA capacity of tranaformer 11000 Volt as per IS 3347/1967 complete all as specified and directed.

All as per item No. 06 above but capacity of transformer 100 KVA to 250 KVA.

Supply and Fixing LV Bushing of transformer with Brass metal connecting rod, nut bolt and washer,suitable for 400 KVA to 750 KVA capacity of tranaformer 1100 Volt as per IS 3347/1967 complete all as specified and directed.