MID/AN/57

1. Restoration by impregnation of 60 HP motors of pumping unit no. 1 & 2 installed at LIS Kah. The job involves disconnecting the electrical connections from the main supply and disassembling the motor by unfastening the foundation nuts and bolts and also decoupling from the pump and Then complete disassembling of the motor involves extraction of rotor from stator followed by cleaning of stator and rotor using compressed air, organic solvent, CCL4 etc. to remove the dust particles /silt etc. Varnishing the rotor and stator with Dr. Beck compound or equivalent make of varnish in two coats, drying by hot air process. Then heat treatment of stator and rotor in electric oven for attaining moisture free status. Thereafter checking the IR value using megger meter. Greasing of the bearings properly. Assembling of the motor. The job also includes cleaning of aluminum and copper cable by using PF solvent to make it moisture and silt free. Providing/fitting of thimbles as per sample which includes crimping. Refitting the motor at its installed position and coupling with pump, making of electrical connections, alignment with pump testing of motor on full load. Complete job includes the cost of material, hiring charges of tools & tackles, to and fro transportation charges from LIS to workshop. Also, labour charges for skilled and semiskilled labour to be employed at site for execution of job including the out-station charges etc. 01 no.Complete job. 2. Restoration by vacuum impregnation to 250 KVA voltage stabilizer at LIS Kah. The job involves disconnecting of the Voltage stabilizer from the main power supply (Incoming and Outgoing cables). Shifting voltage stabilizer from LIS to vehicle and then loading the voltage stabilizer in the vehicle by using crane and suitable tools and tackle and shifting the voltage stabilizer to workshop. Opening and removing of the panel, loosening /disassembling of the top cover, nut and bolts. Lifting of inside transformer assembly with the chain pulley block for extraction of the complete unit. Then clean and dry out all components. Thereafter disassembling of the core assembly and extraction of the all burnt copper wire with the help of manual labour and suitable tools/tackles. Rewinding of copper wire of the superior quality and then complete insulating and varnishing of coils. This includes removing mud, debries and water from internal parts. Replacement of the 170 T.oil with moisture free T. oil in stabilizer by draining old T-oil out of the tank. Lowering of complete unit in tank after p/f of shock proof gasket and body after proper heat treatment for moisture free status with nuts/bolts. Replacement of Voltmeter(no.1), Ammeter(no.1), selector switches, indicator lamps, busbars, internal copper wiring. Shifting the voltage stabilizer to LIS and unloading of the voltage stabilizer at site by using crane Connecting power cables by p/f of new thimbles of the requisite capacity and testing on load. Complete job includes the cost of material, labour charges, transportation charges, hiring charges of tools / tackles required at site. 01 no.Complete job. 3. Restoration by repair to 250 KVA electrical transformer at LIS Kah. The job involves disconnecting of distribution transformer HT links and HT/LT side cables. Dismounting from poles / platform using crane/ skilled and un-skilled labour using tools and tackles, loading in mechanical transport and carriage to workshop and unloading at workshop including head load carriage. Rewinding its 1 no. H.V. coil &1 no. L.V. coils with aluminium conductor wire as per sample size/gauge. Heating the rewinded coils to attain the required megger value. Providing /Fitting of new gasket, L.T. terminal plate, nuts, bolts, insulators etc. Cleaning of the tank and drying it. Providing/Topping up of 50 litres transformer oil and heating the oil to make it moisture free. Lowering the windings back in the tank Assembling the transformer by tightening all nuts, bolts and using oil packing sheets wherever necessary. Loading in the vehicle and shifting back to site . Job includes placing of transformer on the platform with the help of crane using skilled manual labour. Fitting the transformer and restoration of electrical connections. Making of LT side cable connections as well as HT side cable connections and charging the transformer on no load conditions and thereafter checking on full load conditions. Complete job including cost of material, skilled and semi-skilled labour charges, loading & unloading at both ends and transportation charges as per site conditions of LIS.01 no.Complete job. 4. Strengthening of 150 mm dia Suction lines of pumping unit no. 01&02 installed at LIS Kah. The job involves disconnecting the suction pipes & extraction of suction pipes from the sump with the help of manual labour and allied tools and tackles and shifting to the stacking place. Strengthening of suction pipes by welding at leaking portions along with the of damaged flanges. The supporting structure for the suction pipes shall be fabricated using M.S angles (50mmx50mmx6mm)(30mtr). Connecting of suction pipes by Providing / fitting of rubber flanges nuts and bolts etc. Thereafter lowering the suction pipes in sump and connecting suction lines . Complete job including the cost of material and labour charges for dismantling, extraction, lowering and fitting in the sump at the site of LIS including hire charges of tools and tackles and to and fro transportation. 01 no.Complete job. Complete job in all respects.