Overhauling of 1300KW, 1500RPM, 3.3kV, Kirloskar make Slip Ring Induction Motor of Ball Mill in Phosphoric Acid Plant, FACT-CD.

Overhauling of 1300KW, 1500RPM, 3.3kV, Kirloskar make Slip Ring Induction Motor of Ball Mill in Phosphoric Acid Plant, FACT-CD.

Motor dismantling and cleaning: The work includes removing cooling fan cover and fan, radiator, covering of slip ring assembly, dismantling the motor, threading out the rotor from the stator core pack, inspection of stator/ rotor/ end overs/ slip ring and brushes/ bearing cup assembly, cleaning of the dismantled parts and inspection of the parts to find out the damages if any.

Motor radiator cooling tube repair works. This work includes replacing of damaged cooling tubes, cleaning, painting and testing. This work shall be executed on the basis of requirement and after getting approval from concerned engineer in charge. If partial repair work only required, the payment will be done proportionally.

Fabrication of cooling fan: The scope of work includes design and fabrication of motor cooling fan as per the size, dimension and shape of the original fan. Material of construction of new fan shall be the same as the original fan. This work shall be executed on the basis of requirement and after getting approval from concerned engineer in charge.

Mechanical Works of Bearing Housings: The scope of work includes inserting metal sleeve inside bearing housing, locking the sleeve, machining and size correction of sleeve suitable for inserting bearing. This work shall be executed on the basis of requirement and after getting approval from concerned engineer in charge.

Varnishing and Baking of rotor and stator: The scope of work includes replacing damaged core stampings, if any, with new one, varnishing the stampings, windings, rotor bars, non current carrying parts of slip ring, etc. with insulating varnish, curing the varnish by baking the motor parts in oven.

Rotor balancing: The work includes Fixing of inside cooling fan & slip ring assembly on rotor using new nut/bolt/star washer/spring washer, inserting outer cooling fan/coupling and doing dynamic balancing of rotor to balance quality grade of G2.5 at rated RPM. Anabond thread sealing compound shall be applied to the thread of bolts to avoid loosening due to vibration.

Assembling, painting and testing of motor: The work includes assembling of motor using the new bearings supplied by FACT (free of cost), properly fixing the cable terminal boxes, radiator, slip ring assembly, coupling, etc., painting of motor using two coats of anti-corrosive epoxy paint over suitable primer, conducting routine tests as per relevant IS standers and No-load trial run at the rated voltage of 3.3 KV. All test reports shall be submitted before dispatching the motor. The test results shall be in compliance with applicable standards/ regulations etc. In case of deviations beyond acceptable values, they shall be brought to normal values by carrying out necessary corrective measures without any extra cost to FACT. Oil seals in bearing housing, if present, shall be replaced with new ones. Minor machining/ polishing works required for the work shall be done by the contractor if required. Mobil Unirex N3 grease shall be used for motor bearing lubrication.

CURRENT ELECTRO MECH PVT LTD (BID ID -3231952)

Coral Rewinding India Private Limited (BID ID -3233950)

Delta Roto tech Pvt. Ltd. (BID ID -3236321)