SE/ES/TTPS/ Spec.No.171/ 2022-23

STATOR REWINDING (6.6 KV) Charges towards stripping out of old windings, cleaning the slots, conducting hot spot tests to find out the core damages, removing the stator core pack from the stator yoke by hydraulic press using special tools and machineries, rewinding the stator using class `F’ enameled double fiber glass covered electrolytic grade rectangular copper conductors, coil looping, pre-staggering with thermopreg, insulating the slot portions using samicapor insulating materials, applying corona protection tapes and stress grading tapes, inserting the windings into the slots, banding the overhang portions in the surge ring, leading out the end connection, fixing of RTDs, preheating, Global Vacuum Pressure Impregnating the winding with core pack in vacuum chamber using suitable resin, baking, testing, re-fixing the core pack into the stator yoke with special tools and machineries in hydraulic press, providing flexible silicon cables including applying finishing varnish (Retrieved old stator copper to be retained by contractor).

Less the cost of Retrieved copper(This copper scrap to be retained by the contractor

STATOR CORE RESTACKING: (Optional)Charges towards mounting the stator body in hydraulic press, removing the core pack from stator body with special tools and machineries after heating the stator yoke with special heating arrangements, segregating the damaged stator core from core pack, removing the old burnt core plate varnishes by chemical treatment, cleaning, removing the surface kinks, varnishing the stampings in re-varnishing cum conveyor oven to cure the core plate varnish, staggering the core with special tools and machineries, locking and repositioning the core pack to the stator body by hydraulic press and finally conducting the flux loop test to ascertain the restacked core healthiness, cleaning and polishing the slots ready to feeding(if necessary)

To and fro transport charges and transit insurance