HWPK/Elect/2023/Rewinding/111

Amount

Transportation, rewinding, testing and painting of following power rating, 3 phase, 415 volt, 2 / 4 / 6 pole motors as per technical specifications including disassembly, cleaning of slots, testing of core for “Hot Spot”, providing Nomex paper as slot insulation, complete rewinding with class F insulation new copper conductor, varnishing, coating with epoxy gel & becktol red and baking. Technical specifications: Transportation of motor from HWP(Kota) site to repairer's shpo and back to HWP(Kota) site, disassembly, complete stripping out old / burnt winding and cleaning of stator core / slots, testing of core for “Hot Spot”, removal of “hot Spot” against other item, complete rewinding of stator with new copper conductor of EC grade having class F insulation after providing Nomex paper as slot insulation, pre-heating, varnishing with class F varnish, coating the winding with epoxy gel & becktol red, baking of stator winding in oven, replacement of bearing and / or spare parts, if required (free issued by department), lubrication of bearings with Servo Gem – 2 grease of M/s IOC, assembling of motor, cleaning & painting and testing in presence of departmental engineer.

Up to 0.75 KW / 1 HP

Above 1 HP but up to 2 HP

Above 2 HP but up to 5 HP

Above 5 HP but up to 7.5 HP

Above 7.5 HP but up to 10 HP

Above 7.5 KW / 10 HP but up to 12.5 HP

Above 12.5 HP but up to 15 HP

Above 15 HP but up to 20 HP, 2 / 4 pole, Frame AMW 132 / AMW 160 / D 160 L

Above 20 HP but up to 25 HP, frame size AMW 160 / AMW 180 / LE 180

Above 25 HP but up to 30 HP, 2/ 4 pole, frame AMW180 / LE180 / AMW200 L2

37 HP, 2 pole, frame size AMW 200 L2 or equivalent

50 HP/ 53.2 HP , 2 / 4 pole, frame size AMW 225 S2 / M2 / S4 , LD 225 MMK II or equivalent

60 HP , 2 pole, frame size AMW 225 M2 or equivalent

75 HP , 2 / 4 pole, frame size AMW 250 M4 / D 280 or equivalent

90 HP , 2 pole, frame size AMW 280 S2 or equivalent

100 HP , 2 / 4 pole, frame size AMW 280 S4 / M4 or equivalent

108 HP, 4 pole, frame size AMW 280 S4 or equivalent

125 HP , 4 pole, frame size AMW 280 M4 or equivalent

136 HP , 4 pole, frame size AMW 315 L4 or equivalent

150 HP , 2 / 4 pole, frame size AMW 315 S4 / D 315 S or equivalent

164.5 HP , 2 pole, frame size AMW 315 M2 or equivalent

193 HP, 2 pole, frame size AMW 315 L2 or equivalent

214 HP, 2 pole, frame size AMW 355 S2 or equivalent

215.5 HP, 4 pole, frame size AMW 355 S4 or equivalent

246.5 / 250 HP, 2 pole, frame size AMW 355 M2 or equivalent

271 HP, 2 pole, frame size AMW 355 L2 or equivalent

280 HP, 4 pole, frame size AMW 355 M2 or equivalent

Repair of bearing seat of motor rotor shaft / removal of shaft bent including checking of shaft trueness / repair of bearing housing (ID) by depositing metal by TAFA metal spraying technique after necessary groove cutting including transportation. For measurement purpose area of metalized surface shall be taken in Sq. Inch.

Brazing of rotor bar end with short circuiting rings for rotor of 90 HP to 280 HP motors mentioned above by using silver brazing rods (Ruptam 43), cleaning of excess metal. Up to 5 no. of bar ends brazing shall be considered as one lot and subsequent brazing of up to 5 bar ends shall be 2 lot and so on.

Transportation and dynamic balancing of following rotor of various HP to the grade of G2.5

Rotor having weight up to 50 Kg.

Rotor having weight above 50 Kg. but up to 100 Kg.

Rotor having weight above 100 Kg. but up to 200 Kg.

Rotor having weight above 200 Kg. but up to 400 Kg.

Rotor having weight above 400 Kg. but up to 600 Kg.

Rotor having weight above 600 Kg. but up to 800 Kg.

Removal of hot spot from the stator of 90 HP/AMW 250 frame to 280 HP/AMW355 frame, 3 ph, 415 V motors stator (2 / 4 pole) including dismantling of core laminations up to hot spot location, cleaning of burnt varnish from lamination faces by suitable cleaning agent, application of core plate varnish of required thickness, assembling of lamination after restacking as required.

Transportation of following rotor / motors, disassembly, removal of bars and rings from rotor core, design, supply and replacement of all bars and end rings fabricated from solid copper plate as per original dimensions as per technical specifications including groove cutting, brazing of bars with end rings and dynamic balancing of rotor (with & without fan) to the grade G 2.5,painting, assembly and testing. Technical specifications: Transportation of following rotors / motors from HWP(K) site to the repairer's shop and back to HWP(Kota) site, disassembly, parting of cage bars from end shorting rings, removal of bars and rings from rotor core, design, supply and replacement of rotor cage bars and end shorting rings fabricated from solid copper plate without any change in starting / running torque, output and efficiency of motor. The job includes making, shaping and supply of new EC grade copper bars & end shorting rings, ultrasonic testing of new end shorting rings for ensuring freeness from internal defects, machining of end shorting rings to new design and cutting of required grooves to accommodate rotor bars, insertion of new bars in rotor core slots, facing of rotor bars, brazing of bars with end shorting rings, cleaning of excess metal from end shorting rings after the job of brazing, dynamic balancing of rotor ( without & with fan) to the grade G 2.5, painting, assembly and testing of the motors in presence of departmental engineer.

NGEF make motor of 75 HP power rating, AMW 250 M4 frame size, 4 pole, 3 - phase, 415 volt or equivalent motor.

NGEF make motor of 90 HP power rating, AMW 280 S2 frame size, 2 pole, 3 - phase, 415 volt or equivalent motor.

NGEF make motor of 100 HP/108 HP power rating, AMW 280 S4 / M4 frame size, 2/4 pole, 3 - phase, 415 volt or equivalent motor.

NGEF make motor of 123 KW / 164.5 HP power rating, AMW 315 M 2 frame size, 2 pole, 3 - phase, 415 volt or equivalent motor.

NGEF make motor of 193 HP power rating, AMW 315 L 2 frame size, 2 pole, 3 - phase, 415 volt or equivalent motor.

NGEF make motor of 214 HP power rating, AMW 355 S 2 frame size, 2 pole, 3 - phase, 415 volt or equivalent motor.

NGEF make motor of 246.5 / 250 HP power rating, AMW 355 M 2 frame size, 2 pole, 3 - phase, 415 volt or equivalent motor.

NGEF make motor of 271 HP power rating, AMW 355 L 2 frame size, 2 pole, 3 - phase, 415 volt or equivalent motor.

SUNRISE ELECTRICALS