Reconditioning of 02 No.s VCB Panels, 6.6 KV, 800 Amp at Tawi Pump House Jammu.

Amount

Reconditioning of VCB Panel-I 6.6 KV, 800 Amp at Tawi Pump House Jammu by way of checking of breaker and racking out Vacuum Circuit Breaker from chamber, cleaning the HT panel using cotton rags, cleaning Chemical such as CRC spray removing, dust, carbon deposits at contacts, replacement of damaged spring charging mechanism along with spring charging gear motor 230 V AC, closing and shunt trip coil 110 V DC, , auxiliary switch, anti-pumping relay and auxiliary contactor 230 V AC -01 no. by way of extraction of damaged parts and providing and fitting of new parts of same specifications. Complete servicing of Vacuum circuit breaker, checking IR value between earth and all phases and then across all phases and testing it at test position, taking out CT/PT unit from housing after disconnecting HT supply from Receiving station and discharging contacts and complete servicing of CT/PT by cleaning insulators by removing dust, removing carbon deposits at all contacts points, checking fuses and replace blown up/overheated fuses. Fitting CT/PT unit at its place. Checking primary and secondary connection for tightness. Checking earthing of CT/PT. Measuring insulation resistance. Replacement of old damaged overcurrent earth fault relay by providing and fitting new numerical over current, earth fault relay comprising of (3 O/C+1 EF) units IDMT and instantaneous Characteristics RS 485(L&T or equivalent Make) Auxillary supply 110 V DC. Providing and fitting of 01No ammeter 96 sq mm range 0-200-400A CTR 400-200/5 in place of damaged. Replacement of damaged HRC fuses, indicating lamps, push button, and toggle switch of space heater. Providing and fitting of new space heater in place damaged. Calibration of all protection relay with the help of secondary injecting apparatus and programming Overcurrent earth fault relay. Reconditioning of VCB Panel-II, 6.6 KV, 800 Amp at Tawi Pump House Jammu by way of checking of breaker and racking out Vacuum Circuit Breaker from chamber, cleaning the HT panel using cotton rags, cleaning Chemical such as CRC spray removing, dust, carbon deposits at contacts. Replacement of damaged catch mechanism, spring charging gear motor 230 V AC, closing and shunt trip coil 110 V DC, auxiliary switch by way of extraction of damaged parts and providing and fitting of new parts of same specifications. It includes Complete servicing of Vacuum circuit breaker ,checking IR value between earth and all phases and then across all phases and testing it at test position, Drawing out CT/PT unit from panel after disconnecting HT supply from Receiving station and complete servicing of PT by cleaning PT thoroughly removing dust, carbon deposits at all contacts points , insulators using cleaning chemical(Carbon tetra chloride etc.) replacing blown up/overheated HT/LT fuses .Fitting CT/PT unit at its place. , checking fuses and replace blown up/overheated fuses. checking insulation resistance. Replacement of old damaged overcurrent earth fault relay, High Speed master Trip Relay by providing and fitting new Numerical over current, earth fault relay comprising of (3 O/C+1 EF) units IDMT and instantaneous Characteristics RS 485(L &T or equivalent make) Aux supply 110 V DC and new Master Trip Relay. Providing and fitting new voltmeter 96 sq mm 0-8KV 6.6 KV/110v in place of damaged. Replacement of damaged space heater -01 no., wiring, indicating lamps, push button, toggle switch of space heater. Calibration of all protection relay with the help of secondary injecting apparatus and programming Overcurrent earth fault relay. Resetting and adjusting the vacuum interrupters with respect to closing and tripping system. Inserting Vacuum circuit breaker in its compartment, first testing on test position and then on connecting load. Complete job includes cost of material, labour charges and all tools /apparatus required during execution of job.

M/S RAGHUNATH MECHANICAL AND ELECTRICAL ENGINEERING WORKS (BID ID -2261845)

GS ENGG WORKS (BID ID -2256407)