NCTPS I ES Circle EM II Dn S Dn I Unit III Overhauling of HT ID fan Motor 3B SlNo 32570 A 401 01 01 PA Fan motor 3B SlNo 32277 P 401 02 04 at Boiler area 0 mtr and complete cleaning and maintenance of HT motors 10 Nos to be carried out during

Amount

Overhauling of ID Fan Motor- 3B Charges for removal of roof, removal of hand rails, releasing power terminal box, releasing the BHEL make,6.6 kV 1500 kW 745 rpm ID fan Motor from its bed after giving proper packing to its bed bolts, assisting while lifting and lowering of the Motor and placing at repair bay and removing the coupling pulley(Provision of crane for the works and transportation of the ID fan motor to NCTPS-I stores after completion of motor overhauling works at repair bay is under contractor scope)

Charges for dismantling of BHEL make, 6.6 KV, 1500 KW, 745 rpm ID fan Motor cooler, removing the fan cover, fan and end covers, threading out the rotor, cleaning the stator winding and rotor and cooler tubes using compressed air.

Charges for checking and tightening of all loose wedges in the stator of BHEL make, 6.6 KV, 1500 KW, 745 rpm ID fan Motor by inserting additional glass textolite liners and replacing all damaged wedges by new ones, checking the tightness of rotor bars and supplying and spraying one coat of Dr. Beck insulating varnish on the stator and rotor.

Charges for removing the BHEL make, 6.6 KV, 1500 KW, 745 rpm ID fan Motor bearings from the shaft, checking the bearings and its clearance, inspecting the bearings and replacement of bearings if necessary (both DE & NDE)

Charges for threading in the BHEL make, 6.6 KV, 1500 KW, 745 rpm ID fan Motor rotor, assembling the Motor and greasing the bearings.

Charges for supplying and painting 2 coat of light grey enamel paint on the BHEL make, 6.6 KV, 1500 KW, 745 rpm ID fan Motor.

Charges for Fixing the coupling pulley in the BHEL make, 6.6 KV, 1500 KW, 745 rpm ID fan Motor by oil heating and transporting the Motor from repair bay-I to location, Lifting and lowering of the Motor and placing in its bed for re-erection of Motor, refixing of power terminal box, re-erection of roof and refixing the hand rails of. (Provision of crane for the works and transportation of the spare ID fan motor available at NCTPS-I stores to repair bay and then erected at ID fan motor 3B location is under contractor scope)

OVERHAULING OF PA FAN MOTOR-3B Charges for Removal of roof, removal of hand rails releasing of power terminal box, releasing the BHEL make, 6.6 kV,1250 kW,1481 rpm PA Fan Motor from its bed after giving proper packing to the bed bolts, assisting while lifting and lowering of the motor and placing in position at repair bay and removing the coupling pulley (Provision of crane for the works and transportation of the PA fan motor to NCTPS-I stores after completion of motor overhauling works at repair bay is under contractor scope)

Charges for dismantling of BHEL make, 1250 kW, 1481 rpm PA Fan Motor removing the fan cover, cooling fan and end covers, threading out the rotor, cleaning the stator winding and rotor and cooler tubes using compressed air.

Charges for checking and tightening of all loose wedges in the BHEL make, 6.6 KV, 1250 KW, 1481 rpm PA Fan Motor stator by inserting additional glass textolite liners and replacing all damaged wedges by new ones, checking the tightness of rotor bars and supplying and spraying one coat of HT motor suitable insulating varnish on the stator and rotor.

Charges for removing the BHEL make, 6.6 KV, 1250 KW, 1481 rpm PA Fan Motor bearing from the shaft, checking the bearing, checking its clearance, inspecting the bearings and replacement of bearings if necessary (both DE & NDE)

Charges for threading in the BHEL make,6.6 Kv,1250 KW, 1481 rpm PA Fan Motor rotor, assembling the motor and greasing the bearings.

Charges for supplying and painting 2 coat of deep orange enamel paint on the BHEL make,1250 KW,1481 rpm PA Fan Motor.

Charges for Fixing the coupling pulley in the BHEL make,1250 KW, 1481 rpm PA Fan Motor, transporting the motor from repair bay-I to location, assisting while lifting and lowering of the motor, placing in its bed for re-erection of motor, refixing of power terminal box, re-erection of roof and refixing the hand rails.(Provision of crane for the works and transportation of the spare PA fan motor available at NCTPS-I stores to repair bay and then erected at PA fan motor 3B location is under contractor scope)

Charges for providing DE Bearing housing seating sleeve for ID fan motor and PA fan motor (if necessary)

Charges for providing NDE Bearing housing seating sleeve for ID fan motor and PA fan motor (if necessary)

Charges towards providing ERW heat exchanger tubes which have existing pipe quality and dimension(ID-28.5,OD-30,L-1900mm) including removing the old damaged cooling tubes and cleaning the holes and refixing the new tubes and locking for 6.6 KV,1250 KW, 1481 rpm PA Fan Motor (Released old tubes to be devoluted at NCTPS-I store (If necessary)

Complete cleaning of fan,fan cover ,cooling tubes and painting work including checking of Bolt & Nut tightness of HT motors-10 Nos(HT mill motors-6 Nos,PA fan motor-3A,FD fan motor -3A & 3B and ID fan motor 3A during Annual overhauling of Unit-III- 2024-25. The following are the works to be carried out, 1.Removal of fan cover, 2.Cleaning of Inner side fan cover &fan, 3.Complete cleaning of cooling tubes using tubular brush and compressed air, 4.Painting of fan,inner side of fan cover and cooling tubes with red oxide paint, 5.Painting the tip of cooling tubes at non-drive end with Aluminium paint, 6.Opening ,cleaning of CT box and checking the tightness of bolt & nut, 7.Fixing of fan cover. (Paint supplied by TANGEDCO),

Cooling tubes with dimension(ID-28.5,OD-30,L-1900mm)(If necessary)

Consumables and Tool & Plants

SRI RAVI BALAJI ERECTORS (BID ID -1068545)