e-NIT No.43 of 2023-24 dt. 04.12.2023

Amount

Periodic servicing of 450 HP, 6.6 KV, 3-phase, slip ring type HT motor of various units at lift irrigation station, Lakhanpur. Periodic servicing of 450 HP, 6.6 KV, 3-phase, slip ring type HT motor of various units i.e 1,2,4,5,6,7,8,9,10,11 at lift irrigation station, Lakhanpur by way of Cleaning of 450 HP slip ring induction motor by thoroughly blowing out dirt from slip ring assembly and windings, cooling fan, cooling fins with the help of blower and then checking all the terminals, insulators and connections in the terminal box and tightening all the loose connection properly, servicing of slip ring assembly by way of leveling the contacting surface so that the contact between carbon brushes and copper strip become smooth, replacing all the damaged studs and insulators. Replacing the worn out carbon brushes by the new one (new carbon brushes to be provided by the department) for 04 Nos of motors by using high skilled labour. Alignment of the motor using dial gauge by way of disengaging the motor and pump and also replacing coupling bolts along with rubber bushes in place of damaged/rusted one of 04 Nos of motors (to be provided by the department for Jyoti, Flowmore and M&P make pump). Tightening all the nuts and bolts of foundation and base frame of motor to remove vibration and noise. Checking of bearings of the motor to ensure their proper smooth working and greasing the bearings of both the ends(DE and NDE) properly by using superior quality grease by opening of bearing covers and applying the grease using grease pressure gun. The complete job includes cost of material, labour charges (both skilled and unskilled), charges for all tools and tackles and miscellaneous charges required for execution of job. (complete job for 10 Nos of motors)

Periodical maintenance/repair of components of horizontal split casing type pump of unit no. 06 WPIL make and unit no. 09 M&P make having 17 cusecs discharge, 50.5 mtr. head, coupled with 450 HP, slip ring type HT motor installed at LIS Lakhanpur. Decoupling both the pumps of unit No 06 WPIL make and 09 M&P make from 450 HP slip ring type HT motors. Opening the top cover then Unbolting the bearing housings and extracting out the shaft assembly for replacement of vital component of assembly. Lifting and shifting the pump assembly with the help of the EOT crane and loading & transporting both the shaft assembly to the firm’s workshop. Dismantling all the components from both shaft assembly such as coupling pulley, impeller, impeller rings, shaft protection sleeves, collar, spacer sleeves, sleeve nuts, O-rings, water deflector, stuffing box bushings, lantern rings, bearings at workshop etc. Repairs to the damaged stainless shaft (SS-410) of the pump unit no 09 M&P make by rebuilding the shaft at various spots including damaged threaded portion and key way by depositing SS material at worn out spots by welding with SS electrodes, turning, grinding, and finishing to the required dimensions and re-threading at the requisite place to fit chuck nuts. Fabrication of new key way and providing of new key so that the shaft and impeller get properly aligned. Removing the eccentricity developed in the shaft with the help of heat treatment & press bench. Repairs to the damaged stainless shaft (SS-410) of the pump unit no 06 WPIL make by rebuilding the shaft at various spots including damaged threaded portion and key way coupling pully side by depositing SS material at worn out spots by welding with SS electrodes, turning, grinding, and finishing to the required dimensions and re-threading at the requisite place to fit chuck nuts. Fabrication of new key way and providing of new key so that the shaft and coupling pulley get properly aligned. Removing the eccentricity developed in the shaft with the help of heat treatment & press bench. Providing and fitting of 02 nos. new shaft sleeves fabricated out of stainless steel (SS-410) material in place of the worn out one of pump no 06 WPIL make. The size of the sleeve should as per the sample provided. Fitting of 02 nos. new shaft sleeves fabricated out of stainless steel (SS-410) material in place of the worn out one of pump 09 M&P make. (sleeves for pump no 09 M&P make will be provided by the department). Cleaning the bearing housings of pump no 06 WPIL make properly and smoothening the internal surface with emery paper. Providing / Fitting of bearing No. 6217 both at driving end and non driving end of some reputed make and greasing them properly along with 1 no. bearing lock nut and lock washer on non driving end side. Fitting of 02 nos. new bearing 6316 ZZ in place of damaged one at DE & NDE to pump no. 09 M&P make (to be provided by the department). Providing and fitting of 03 nos. new sleeve nuts fabricated out of stainless steel (SS-410) material having internal threads in place of the old and worn out one to pump no 09. The size of the sleeve nuts should as per the sample provided. Providing and fitting of 02 nos. new sleeve nuts fabricated out of stainless steel (SS-410) material having internal threads in place of the old and worn out one to pump no 06 WPIL make. The size of the sleeve nuts should as per the sample provided. Providing and fitting of 2 nos. new lantern rings as per sample fabricated out of bronze material in place of worn out one to unit no. 09 M&P make. Fabrication/providing of new coupling pulley set in place of old/damaged pulley as per sample provided to the pump No 09 M&P make. Assembling all components on both the shaft such as impellers collar, wearing rings, shaft protection sleeves, o- rings, spacer sleeves, chuck nut, lantern rings. Shifting back both the shaft assemblies of unit no 06 WPIL make and 09 M&P make to Lift Irrigation Station and then placing respective pump assembly in the lower casing of the pump no 06 and 09. Providing and fitting of the gland packing set. Making proper alignment with motor fitting top cover by providing and fitting of new studs in place of damaged one. Coupling pump and motor by providing and fitting new coupling bolts with bushes and nuts. complete job includes cost of material, labour charges, transportation charges, charges of all tool and tackles required for execution of job.

M/S TRIKUTA ELECTRICAL AND MECHNICAL WORKS

BEE AAR ENTERPRISES