GE ELECT/TOKEN-54/2026-2027

Material and Labour for disconnecting carefully electrical connection from both HT/ LT (primary & secondary) sides of the transformer, keeping them at safe side and taking out the transformer/Voltage stabiliser indoor/ outdoor type of capacity 800 KVA to 1500 KVA, 11 KV/433KV, step down any make for carrying out complete overhauling which shall comprise complete all as specified and directed by the Engineer-in-Charge of the following:- a) Material and labour for lifting, transporting, handling the transformer to workshop and back to the original location after complete overhauling. b) Conducting the tests on core and windings as per IS like ratio, magnetic imbalance, short circuit etc. in presence of Engr-in-Charge and test results shall be signed both by the contractor and Engineer -in-Charge and kept on record. Note:- (i) Any damage to insulators/ bushes/ windings etc. while in the custody of the contractor shall be made good at no extra cost to Department. The serviceability of the transformer shall be checked and confirmed by the contractor before taking into his custody. (ii) Material and labour for rewinding/ re-insulation of HT/ LT (primary/ secondary) coils, bushes, studs, Transformer oil, cable box, replacement of bucholtz relay/ MOG if any etc will be measured and paid separately.

All as per Item No. 1 herein before but transformer/Voltage stabiliser indoor/ outdoor type of capacity up to 400 KVA to 750 KVA complete all as specified and directed by the Engineer-in-Charge

All as per Item No. 1 herein before but transformer/Voltage stabiliser indoor/ outdoor type of capacity up to 100 KVA to 315 KVA complete all as specified and directed by the Engineer-in-Charge

Material and Labour for filtration of transformer oil of transformer/Voltage Stabilizer installed at various locations to achieve di-electric strength not less than 60 KV at 2.5mm gap as per relevant IS with portable filtration plant, testing of the oil for the di-electric strength before filtration and after filtration complete all as specified and directed by the Engineer-in-Charge.

Supply and topping up of transformer oil with di-electric strength not less than 60 KV in to the conservator tank/ body tank of the transformer/ OCB/ FRMUs etc at various locations complete all as specified and directed by the Engineer-in-Charge.

Material and Labour for rewinding of distribution transformer/Voltage Stabilizer of capacity (100 KVA to 1500 KVA)/ type by winding the low insulation/defective coils of Primary Coil (HT coil) with new copper wire as per I.S. of same gauge and existing size together with new insulated materials/ bracings before placing in to the transformer and assembling the coil with new insulation and fitting the coils in the chamber, testing and commissioning the transformer and recording the test results complete all as specified and directed by the Engineer-in-Charge [Note: Material and Labour for re-insulation of serviceable coils will be measured & paid separately under relevant items.]

Material and Labour for rewinding of distribution transformers/Voltage Stabilizer of capacity (100 KVA to 1500 KVA)/ type by winding the low insulated/ defective coils of Secondary Coil (LT Coil) with new copper wire as per I.S. of same gauge and existing size together with new insulated materials/ bracings before placing in to the transformer and assembling the coil with new insulation and fitting the coils in the chamber, testing and commissioning the transformer and recording the test results complete all as specified and directed by the Engineer-in-Charge [Note: Material and Labour for re-insulation of serviceable coils will be measured & paid separately under relevant items.]

Material and Labour for re-insulating windings of distribution transformers/Voltage Stabilizer of capacity ( 100 KVA to 1500 KVA) / size / type by strip opening of HT/ LT coils (i.e. Primary/ secondary coils) from core assembly safely, unwinding the HT/ LT coils (i.e. Primary/ secondary coils) complete, removing the old defective insulation paper and replacing with new DPC insulation to the copper conductor, re-varnishing of the windings with super varnish including heating/ drying/ backing complete carefully and thoroughly inside the heating chamber at suitable temperature to obtain required value of insulation resistance etc. all as per IS 1986-87 and complete all as specified and directed by the Engineer-in-Charge

Disconnection of the Distribution Transformer/Voltage Stabilizer from HT and LT supply mains, removing of Bus duct and Bus bar, Leakage arresting to transformers of capacity 100 kVA to 1500 kVA by draining out of oil, after arrangement of necessary empty oil drums, buckets etc., dismantling of top cover and accessories, dismantling of LT bushings by disconnecting leads/jumpers from inside, replacement of gaskets and oil seals and re fixing of the LT bushings, making internal and external connections, replacement of cover gasket and accessories, refixing of accessories and cover, filling of transformer oil complete, and making cable connections and for energising the transformer complete all as specified and directed by the Engineer-in-Charge. NOTE :- Cost includes materials like gaskets and oil seals and labour, the Bushing and bushings rods to be measured and paid separately.

Disconnecting the HT/LT connections of transformers/Voltage Stabilizer capacity 100 KVA to 1500 KVA i.e (Bus duct / Cable bunch) keeping all the cables out from the HT/LT sides, physically checking the transformer for healthiness, performing the transformer tests like Meggar test, Ratio Test, Magnetic Balance test and short circuit tests for checking the condition of transformer complete and test results shall be submitted by the contractor complete all as specified and directed by the Engineer-in-Charge. Note:- (i) If the transformer found satisfactory then HT/LT connections shall be done by the contractor and has to charge the transformer. (ii) If the transformer fails in these tests then the contractor has to shift the transformer for winding /overhauling. (iii) Cost of Transportation / winding / overhauling is exclusive of rate quoted by the contractor.