Complete repairing -rewinding of Tapered shaft SCI Make induction motor (40HP, 550V) and Kirloskar make slipring motor(100HP,550V) of Chora 7n9 Pits Colliery

Amount

Item Description/ Heading

Repairing/rewinding of tapered shaft Slipring Motor(100HP, 550V)

Dismantling the motor stator and rotor after removing both side earing and taken out burnt coils after removing the damaged slot wedges and circuit connection

New polyester base super enamelled copper wire

Class F insulation materials including varnish, thinner etc

Cost of flexible lead with sockets for connection jumpering and wooden forma for making new coils

Winding charges/jormation of coil, inserting of newly formed coils in stator slots and circuit connections with jumpering

Drying and heating in recommended temperature and testing of stator

Cleaning/painting/nut-bolts/washer and other hardware materials

New electrolyte copper strips/bar against old brittle bar of rotor

Dismantling the old burnt brittle frazil bars after removing both side copper sockets

Decarbonizing/cleaning of old existing rest of copper strips and also core slot after removing old burnt insulation materials

Glass tape(5 mm)

Glass tape(3 mm)

Cost of copper socket

Cost of nomex/glass polyester glass mica

cost of F-50 varnish and thinner

Re-insulation of entire copper bars with glass insulation

Cost of dry out/heating and testing of rotor

Binding of rotor both side end with TSB binding wire and other required materials

Block tin/lead/eyre - 7 for socketing

Re-metallization of rotor shaft in worn out of the bearing position

Fabrication of fan cover with materials

Making and supplying of new slipring as per original specification

Cost of supplying of new metal graphite carbon brushes

Fabrication of new fan with materials

Cost of varnishing

Cost of flexible glass cable with socket for connections

Winding charges/inserting of newly insulated bars in rotor slots in chronological manner and circuit connection with jumpering

Less scrap value

Repairing/rewinding of tapered shaft SCI make induction motor(40HP, 550V)

Super enamelled copper wire

Insulating materials

Glass lead with socket

Wooden forma for making coil

Thinner and varnish

Materials required for leaning, decarbonizing motor, washing, greasing of bearing and painting

Dismantling of broken rotor shoft by hydraulic puller

New rotor shaft(EN-24)

Making of rotor shaft as per dismantling old original rotor shaft

Rewinding charges

Refitting of new shaft in the rotor using hydraulic puller stator and assembly with test

Both side end cover welding, machining and locking

Bolts and nuts

Less scrap value

Transportation charges for both motors

Total impact of GST for the purpose of CTC

MAZUMDER ELECTRICAL (BID ID -1180762)

ENERGY ENGINEERING (BID ID -1180775)