repairs to 100KVA Electric transformer and providing and fitting of main Switch with allied works at LIS Nud Behra

Amount

Repair to 100 KVA electric transformer installed at LIS Nud Behra by way of disconnecting of HV and LV line connections from transformer. Removing the top cover after unscrewing all the nuts and bolts along with dismantling of HV & LV bushes. Taking out the coil assembly using chain pulley and other allied tools and tackles. Extraction of damaged HV coils from the coil assembly at site. Draining out of transformer oil from container at site. Carriage of coils to road side using tools, tackles and manual labour through hilly terrain by head load and then Loading in mechanical transport for further shifting to workshop for repairs. Dismantling of coils at workshop and providing and rewinding of new HV coils for two phases and LV coil for 2 No. leg/phases with the Aluminium wire of requisite specifications as per original design and varnishing complete. Drying the coils by keeping in oven. Filtration of old transformer oil by giving proper heat treatment at site. Then carriage back of newly rewound coils and other material to the site of installation. Desludging of oil tank by using suitable heat treatment methods and cleaning tank of dust, oily substances and then welding at the damaged surface to plug the leakage of Transformer oil, cleaning the core assembly with kerosene oil and then after drying lowering it in the transformer tank, P/F of 3 No HV Bush rod assembly and 4 No. LV bust rod assembly with insulators and rubber sheets using skilled labour. Fitting of the newly rewound coils to the legs of the coil assembly and fitting of the core and making connections of the coil assembly. Lowering of the coil assembly in the container after making proper connections. Filling of filtered transformer oil and topping up of new transformer oil 100 litres approximately. Complete assembling of transformer. Making all the electrical connections on HV and LV side by P/F thimbles of required size/rating along with proper insulation. Checking for continuity. commissioning and testing of the Transformer on no load and then on full load. Complete Job includes cost of material, labour charges, installation charges, carriage, transportation charges, hire charges of crane, shifting, testing and commissioning on full load at LIS.

clearing the way to approach the foot valves by extracting the debris around the foot valves at LIS Nud Behra using manula labour The job also involves desilting the pump room of sand, pebbles accumulated in pump house due to rain waters entering downslope into pump house and removing and disposing of mud ,dust, silt and unwanted material from the surface and from beneath the electro-mech equipments, by way of using dhoti cloth, sand paper and then cleaning of suction pipes of silt. Extracting the 200mm and 250mm dia foot valves submerged in silt and twigs by removing the silt and then dismantling of foot valves from suction pipes and cleaning of mud/silt from pipes and foot valves using special tools and tackles and chain pulley block after cutting the rusted nut and bolts with cutter. Complete dismantling of foot valves clearing the silt from hinges of foot valve to unchoke them. Applying sufficient quantity of grease to hinges. P/f of new rubber sheets and nuts and bolts for both foot valves. Reassembling the foot valves and lowering it to the site of installation using chain pulley block arrangement. Installation of the foot valves with suction pipes using new rubber washers and nuts bolts. The job also includes P/f of 50mm pipe 10 feet approximately with flanges for priming pump along with 50mm foot valve. Job includes cost of materials, labour charges, tools and tackles charges , hire charges to and fro with outstation charges.

Dismantling of 4 cusec, 25m head pump of pumping unit No II at LIS Nud Behra and then dragging out from the pump house and carriage to road side through mechanical means(trolley) and applying labour also up to the distance of about 600m and then reaching upto main road. Loading of the pumping unit using tools/tackles and manual labour in the vehicle for its further shifting to workshop at Jammu for carrying out the necessary repair/replacement works and carriage back in the same manner to the site at LIS Nud Behra after necessary repair and replacement works at workshop. The job involves complete dismantling of pump at workshop, providing & fitting of new pump shaft after proper finishing, threading and machining for key ways as per the old pump shaft, neck rings for impeller 2Nos.fabrication and fitting of gland sleeves 2Nos., spacer bushes 2Nos., check nuts and lock nuts 2Nos. each, providing and fitting of bearing as per sample 2Nos. Reassembling of the pump at site after greasing the bearings properly using oil paper to make it leak proof. Job further includes providing and fitting of new coupling pulley set along with nut, bolts, washers, rubber bushes etc as per sample. Complete job involves cost of material, labour charges for skilled/unskilled labour, transportation charges, head load charges, hire charges of tools and tackles required for the job inclusive of all taxes as applicable. Complete Job

Upkeepment of 2 No. 50HP ATS by disconnecting both ends of ATS from power cables. Extraction of transformer coils from the tanks of each container, drying and and then varnishing of the coils by heat treatment, Providing and fitting of 36 No. copper contactors for both ATS after replacing the old worn out contactors of both ATS. Cleaning of all the parts with recommended chemicals, cleaning of the tanks to make it silt free, lowering of the coils in the tank, P/filling of 10 liters of T Oil for both starter. The job includes cost of material, labour, tools and tackles and hire charges of skilled labour including testing and commissioning of repaired machinery at site

Providing/fitting of 200 amp Main switch at LIS Nud behra in place of damaged/burnt out main switch by way of installation/fitting of newly constructed MS iron frame/bracket at suitable position after fixing the fasteners on the wall at appropriate positions by using drill, mounting of new 200Amp Main switch on brackets/frame. The newly installed main switch is to be connected with stabilizer with the existing armoured Al cable from LT side of HT/LT transformer to supply end of 250 Amp Main switch, and from Load end of main switch to input terminals of Voltage stabilizer with new thimbles of suitable current carrying capacity. Providing and fitting of new Voltmeter and ammeter of suitable range for Voltage stabilizer, Filling and topping up the stabilizer with 80 liters of T oil. The job involves cost of material, labour, tools and tackles with carriage including testing and commissioning Charges at site.

Rishabh Electricals and Mechanical Works

BEE AAR ENTERPRISES