TTPS ES EM III Replacing of Boiler Feed Pump motor Sl No 32275 A 401 01 5 in 4B bed by a Spare Motor Sl No 32275 A 401 01 2 and Overhauling of released Boiler Feed Pump motor Sl No 32275 A 401 01 5 and cooler in Unit IV

Charges for carrying out an capital maintenance works in Boiler Feed Pump Motors BFP 4B : Sl No:32275-A-401-01-5 Dismantling of the motor: “ Disconnection of Power cables at Phase & Neutral side, space heater cable ” in Boiler Feed Pump motor.

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

Replacement of CT and terminal box (Replacement of CT/PT in LT module and LT Breaker panel) : Charges for releasing the 3 Nos of 500/1 amp C.T, dismantling of phase & neutral side terminal boxes, dismantling of spare heater terminal box and other dummies from the released motor. Refixing the terminal boxes, dummies in the spare overhauled motor. Reassembling of 3 Nos 500/1 amp. Current transformers etc. in the spare motor (Spare Motor (Sl. No.: 32275-A-401-01-2).

Charges for Measurement of IR value & PI value in spare BFP Motor (210 MW generator stator), assisting MRT for testing, and Improving the IR value by flood light if necessary.

Lifting and Erection of the motor (Spare Motor (Sl. No.: 32275-A-401-01-2) back on its bed after cleaning and checking healthiness of pedestal insulation.

“Termination of Power cables at phase & neutral side, space heater cable” in Boiler Feed Pump motor.

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.

Overhauling of released Boiler Feed Pump motor 4B (Sl.No.32275-A-401-01-05) Removal of end covers and measuring the air gap and magnetic axis.

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.

Reassembling the motor complete : Assembling the end covers, checking air gap and magnetic axis.

Charges for Measurement of IR value & PI value in spare BFP Motor (210 MW generator stator), assisting MRT for testing, and Improving the IR value by flood light if necessary.

Boiler Feed Pump Motors and Coolers scraping, cleaning and painting with two coats of enamel paint.

Charges for removal and refixing of floor grills at 15.5 mt level for lifting and re-erecting the coolers in the HT Motors: Removal of floor M.S. grills at 15.5 mt level by EOT Crane after providing adequate barricades for safety measure to lift coolers from the motors and refixing the M.S.grills in position. After completion of work, Removal of M.S.grills by EOT crane at 15.5 mt level after providing adequate barricades for safety measure to reerect the coolers in their motors and refixing the floor M.S.grill in its position.

Overhauling of the BFP cooler : Sl No 4B : 32275-A-401-01-5 (Replacing of Existing Boiler Feed Pump cooler by a Spare cooler & Overhauling of released Boiler Feed Pump cooler).Charges for removing the cooler pipe line and cooler from the motor. Dismantling the cooler cover, cleaning the cooler tubes by wire brush, air and with water. Changing the gaskets and reassembling it, checking the cooler tubes for leak, hydraulic testing of cooler with 4 Kgf / cm2 pressure for six hour duration and reerecting the cooler. Checking the motor terminal tightness and taking IR value and PI value.

BLUE MOUNTAIN