GE ELECT/TOKEN-43/2026-2027

M&L 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 630 KVA to 800 KVA, 11 KV/433KV, step down any make for carrying out complete overhauling which shall comprise of the following:- a) M&L for lifting, transporting, handling the transformer to workshop and back to the original location after complete overhauling or one location to another location where required. 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) M&L 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 500 KVA complete all as specified and directed by Engr-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 Engr-in-Charge.

M&L for filtration of transformer oil of transformers/Servo 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 Engr-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 transformers/Servo voltage Stabilizer etc at various locations complete all as specified and directed by Engr-in-Charge. Make: Power oil/ Transol/ Sabitha Chemicals as approved by GE.

M&L for rewinding of distribution transformers/AVR of capacity (100 KVA to 800 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 Engr-in-Charge. Note: M&L for re-insulation of serviceable coils will be measured & paid separately under relevant items.

M&L for rewinding of distribution transformers of capacity (100 KVA to 800 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 Engr-in-Charge. Note: M&L for re-insulation of serviceable coils will be measured & paid separately under relevant items.

M&L for re-insulating windings of distribution transformers of capacity (100 KVA to 800 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 Engr-in-Charge.

Disconnection of the Distribution Transformer/AVR from HT and LT supply mains, removing of Bus duct and Bus bar, Leakage arresting to following transformers 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. NOTE :- (i) The Cost deems to include materials like gaskets and oil seals and labour complete all as specified and directed by Engr-in-Charge. (ii) The Bushing and bushing rods to be measured and paid separately.

500 kVA to 800 kVA