Rewinding of 3.3 KV, 335 HP, 10 Pole, Induction Motor of Khosla Compressor, FACT-CD.

Rewinding of 3.3 KV, 335 HP, 10 Pole, Induction Motor of Khosla Compressor, FACT-CD.

Stator Rewinding (3.3 KV): Work includes dismantling the motor, threading out the rotor from the stator core pack, stripping out of old windings, cleaning the slots, conducting hot spot tests to find out the core damages, rewinding the stator using of class `F’ enamelled double fibre glass covered electrolytic grade new copper conductors for rewinding coils as per the original shape and dimension by using special jigs and dies, insulating the slot portions using semicatherm insulating materials, moulding the slot portion in hydraulic hot press, applying flexible insulation to the overhang portion, inserting the coils in to the slots, banding the overhang portions in the surge ring, forming the end connection, preheating, varnishing, baking, applying finishing varnishes including assembling, no load trial run after balancing of rotor at the rated voltage of 3.3 KV and measuring all no load parameters. No load test results Shall be sent to FACT.

Stator core restacking: Work consists of 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.

Rotor & bearing housing machining: The scope of work includes machining / inserting sleeves for DE & NDE bearing housings, rotor shaft dimension correction, providing new collars and grease cups required for proper assembling of motor. The work shall be executed only on the basis of requirement and after getting approval from concerned Engineer in charge.

Motor heat exchanger & fan cover repair works: The scope of work includes replacing of damaged heat exchanger tubes, cleaning and painting whole heat exchanger including tubes, replacing corroded parts of heat exchanger cover and reconditioning of fan covers by replacing sheets and corroded parts of fan cover with new ones .This work shall be executed on the basis of requirement and after getting approval from concerned Engineer in charge.

Coral Rewinding India Private Limited