NCTPS I ES Circle EM I Dn S Dn IV Annual Over hauling of HT LT Motors at Unit I during the year 2024 2025

Amount

Complete Overhauling of 3500KW/ 6.6 KV Boiler Feed Pump MOTOR (1A) Removal of end covers and measuring the air gap and magnetic axis

Removal of water line pipes, cooler assembly and lifting the cooler unit to a convenient location.

Removal of sleeve bearings, resting the rotor on the stator after placing rubber sheet.

Removal of foundation bolts, Lifting the motor to a convenient location.

Overhaul of stator : Inspection and cleaning and checking of stator windings, fastening of the stator winding to the end ring and also the inter coil spacers and packing in the overhang portion of the windings, tightening the wedges, spraying one coat of Dr.Beck protective enamel varnish, Drying out the stator, preheating, Checking the IR value, DC resistance and Tan delta, packing in the overhang portion of the windings, tightening the wedges, spraying one coat of Dr.Beck protective enamel varnish, Drying out the stator, preheating, Checking the IR value, DC resistance and Tan delta.

Overhaul of rotor :Inspection and cleaning of released rotor, checking the position of stampings, cleaning of corroded parts, inspection of winding bars, cleaning of overheated and burnt places, applying one coat of Dr.Beck’s insulating varnish and drying out.

Cleaning the cooler tubes, checking the coolers by hydraulic testing, reconditioning of cooler flanges, replacement of gasket etc,

Checking the bearing and preparation of bearing surface and blue matching the housing. (Bearings supplied by TANGEDCO)

Lifting and Erection of the motor back on its bed after cleaning and checking healthiness of pedestal insulation.

Assembling of sleeve bearings, Checking the interference between the bearings and housing, checking the clearance between shaft and bearing. (Bearings supplied by TANGEDCO)

Assembling the end covers, checking air gap and magnetic axis.

Lifting the cooler assembly ,fixing with motor and connecting the water line pipes, etc.,

Tightening the bed bolts, foundation bolts, Checking the IR value, DC resistance and trial run the motor in decouple/couple condition running the motor satisfactorily.

Machining of Oil Catcher of Boiler Feed Pump motor

Complete Overhauling of 500KW/6.6KV CEP MOTOR(1A) Removal of foundation bolts, lifting the motor to a convenient location.

a) Dismantling of motor pulley, cooler, end covers and Threading out the rotor.

b) Checking and cleaning of cooler tubes.

c) Overhaul of stator: Labour charges for inspection and cleaning of stator and winding of stator, fastening of the winding to the end ring and also the inter coil spacers and packing in the overhang portion of the winding, tightening of the wedges, spraying one coat of Dr.Beck’s protective enamel and drying out, Stator preheating, checking the IR value and DC Resistance.

d)Overhaul of rotor:Labour Charges for inspection and cleaning of rotor, checking the position of stampings, cleaning of the corroded parts, Inspection of winding bars, soldered end winding, cleaning of overheated burnt places and applying two coats of Dr.Becks protective enamel and drying out.

e) Releasing the bearing, cleaning, checking, reassembling /replacing the bearing on both ends lubrication etc. (Bearings supplied by TANGEDCO)

f) Assembling of motor after threading in the rotor, fixing end covers, providing rubber gasket and fixing of cooler unit, Checking the IR value, DC resistance and Tan delta.

Lifting of motor, placing at motor bed and tightening of foundation bolts, bed bolts etc.

Machining of DE & NDE Bearing housings in special type lathe sleeve preparation, sleeve pressing in housing, locking and arresting by screw and remachining bearing suit 500 KW CEP motor.

Dynamic balancing of the rotor 500 KW CEP motor Escalation.

Overhauling of LT Motors Overhauling of Auxiliary Oil Pump (MOT) Motor-1B (100 kW)

Labour required for Metal filling ,machining and repairing of worn out shafts / bearing seating surfaces on DE & NDE sides, checking of bearings housings, providing sleeves in the end covers on DE & NDE (optional)

Brazing of new terminal leads from winding, its terminal works (Optional).

Overhauling of Auxiliary cooling water pump motor - 1A & 1D (110 KW LT Motor)

Labour required for Metal filling ,machining and repairing of worn out shafts / bearing seating surfaces on DE & NDE sides, checking of bearings housings, providing sleeves in the end covers on DE & NDE (optional)

Brazing of new terminal leads from winding (Optional).

Overhauling of Sea water booster pump motor - 1A & 1D ( 55 KW LT Motor)

Metal filling ,machining and repairing of worn out shafts / bearing seating surfaces of one side, checking of bearing housings ,providing sleeves in the end cover of one side (optional)

Brazing of new terminal leads from winding, its termination works and provision of New Terminal Block for 3 phase, 415 V, 55KW Sea Water Booster Pump motor (Optional).

Overhauling of Ash water supply pump motor-1B (37 KW)

Metal filling ,machining and repairing of worn out shafts / bearing seating surfaces of one side, checking of bearing housings ,providing sleeves in the end cover of one side (optional)

Brazing of new terminal leads from winding, its termination works and provision of New Terminal Block for 3 phase, 415 V, 37KW Ash Water Booster Pump motor (Optional).

Overhauling of Instrument air compressor motor- 1B (150KW)

Labour required for Metal filling ,machining and repairing of worn out shafts / bearing seating surfaces on DE & NDE sides, checking of bearings housings, providing sleeves in the end covers on DE & NDE (optional)

Brazing of new terminal leads from winding, its termination works (150 KW Instrument Air Compressor motor) (Optional).

Charges for overhauling of Service air compressor motor- 1B (150KW)

Labour required for Metal filling ,machining and repairing of worn out shafts / bearing seating surfaces on DE & NDE sides, checking of bearings housings, providing sleeves in the end covers on DE & NDE (optional)

Overhauling of Vacuum pump motor -1A (93 KW)

Labour required for Metal filling ,machining and repairing of worn out shafts / bearing seating surfaces on DE & NDE sides, checking of bearings housings, providing sleeves in the end covers on DE & NDE (optional)

Brazing of new terminal leads from winding, its terminal works (Optional).

Overhauling of Stator water pump motor - 1B (9.3KW)

Metal filling ,machining and repairing of worn out shafts/bearing seating surfaces of one side, checking of bearing housings ,providing sleeves in the end cover of one side (optional)

Overhauling of AC seal oil pump motor (5.5KW)

Metal filling ,machining and repairing of worn out shafts/bearing seating surfaces of one side, checking of bearing housings ,providing sleeves in the end cover of one side (optional)

Overhauling of Auxiliary Oil Pump (BFP) Motor-1A (5.5 KW)

Metal filling ,machining and repairing of worn out shafts/bearing seating surfaces of one side, checking of bearing housings ,providing sleeves in the end cover of one side (optional)

Overhauling of Jack oil pump motor-1A (30KW)

Metal filling ,machining and repairing of worn out shafts / bearing seating surfaces of one side, checking of bearing housings ,providing sleeves in the end cover of one side (optional)

Overhauling of Debris Flushing Pump Motor -1A (11KW)

Metal filling ,machining and repairing of worn out shafts / bearing seating surfaces of one side, checking of bearing housings ,providing sleeves in the end cover of one side (optional)

Overhauling of Phosphate dosing pump Motor -1B (3.7KW)

Metal filling ,machining and repairing of worn out shafts/bearing seating surfaces of one side, checking of bearing housings ,providing sleeves in the end cover of one side (optional)

Overhauling of Phosphate dosing Stirrer Motor (0.75KW)

Overhauling of Hydrazine dosing pump Motor -1A (0.75 KW)

Metal filling ,machining and repairing of worn out shafts/bearing seating surfaces of one side, checking of bearing housings ,providing sleeves in the end cover of one side (optional)

Overhauling of Hydrazine dosing Stirrer Motor (0.37 KW)

Overhauling of Hydrogen gas drier system blower Motor (1.1 KW)

Overhauling of Stator water Vacuum pump Motor-1A (2.2 KW)

Metal filling ,machining and repairing of worn out shafts/bearing seating surfaces of one side, checking of bearing housings ,providing sleeves in the end cover of one side (optional)

Overhauling of Generator Seal Oil Vapour Extraction Fan Motor-1A (1.5 KW)

Metal filling ,machining and repairing of worn out shafts/bearing seating surfaces of one side, checking of bearing housings ,providing sleeves in the end cover of one side (optional)

Overhauling of Gland Steam Exhaust Fan Motor-1A (2.2 KW)

Metal filling ,machining and repairing of worn out shafts/bearing seating surfaces of one side, checking of bearing housings ,providing sleeves in the end cover of one side (optional)

Overhauling of Priming Pump motor (11 KW)

Metal filling ,machining and repairing of worn out shafts / bearing seating surfaces of one side, checking of bearing housings ,providing sleeves in the end cover of one side (optional)

Overhauling of Recirculation Pump motor of Vacuum Pump -1A (1.5 KW)

Metal filling ,machining and repairing of worn out shafts/bearing seating surfaces of one side, checking of bearing housings ,providing sleeves in the end cover of one side (optional)

Overhauling of Seal Oil Vacuum Pump motor (0.18 KW)

Material (Bearing) 6224 MC3 (for 500 KW DE side) Make:NTN Imported; Cage: Steel

7322 BGM (for 500 KW NDE side) Make:NTN Imported; Cage: Brass

6318 C3 (for 100 KW DE & NDE Side) Make:NTN Imported; Cage: Steel

N321 (for 150 KW DE Side) Make:NTN Imported; Cage: Brass

6318 (for 150 KW NDE Side) Make:NTN Imported; Cage: Steel

6319 C3 (for 93 KW DE & 110KW NDE Side) Make: NTN Imported; Cage: Steel

N 319 C3 (for 93 KW NDE Side) Make:NTN Imported; Cage: Brass

NU 319 (for 110 KW DE Side) Make: FAG; Cage: Brass

6215 C3(for 55KW & 37KW NDE Side) Make:NTN Imported; Cage: Steel

NU 215 (for 55KW & 37KW DE Side) Make:NTN Imported; Cage: Brass

Consumable & T&P

Transporting charges

A.L. ENTERPRISES (BID ID -1067946)