Work

Amount

Following work needs to be carried out at 220/132 KV Sub-station, New Tanda, Ambedkar nagar under ETD Ayodhya with all cost of men, material like grease, cleaner etc. and T & P as per instructions of Surevising Engineer:

Overhauling & Servicing of 145 KV SF-6 Gas Circuit Breakers CGL make. The job includes opening and closing coil/tripping coil assembly holding latch assembly three phase lever opening of charging motor cleaning and lubrication of ratchet assembly and driving pawls. Replacement of all 'O' rings of 6mm and 12mm gas pipe assembly, replcement of minor parts if required. Checking / attending of SF-6 Gas leakage if any. Tightening of all electrical connections of terminal block auxiliary contactor, limit switch etc. including all other work to complete the job as per technical specification. Checking of interlocks & alarms & satisfactory operation of breaker from local and remote of 145KV SF-6 breaker at 220/132KV S/S New Tanda. (i) 132KV New Tanda-Tanda Line-2 CGL make last overhauling since commissioning date 23/12/2015 (ii) 132KV New Tanda-Jalalpur Line CGL make last overhauling since commissioning date 09/06/2015 (iii) 132KV New Tanda-G.Singhpur Line CGL make last overhauling since commissioning date 03/06/2016

Overhauling and Servicing of 33 KV Vacuum Circuit Breakers of various 33 KV Feeders at 220/132 KV S/S New Tanda, Ambedkar Nagar. The work shall include general cleaning and lubrication of Operating Mechanism after dismantling of Close & Trip latches, checking of tightness of all locking pins, nut & bolts etc., setting and adjustment of tripping & closing mechanism, checking and adjustment of connecting pole and main rods and checking of their operation. Overhauling of spring charging motor including Gear Box, replacement of carbon brushes and polishing of commutator as required, checking of MCB and replacement as needed, setting of limit switches after general cleaning using CRC/CTC, tightness and checking of all electrical connections and finally checking of auto spring charging. Checking of Pole operation including measurement of individual contact travel distance, checking of housing sealing and necessary repair, checking of meggar value in open condition including checking of Vacuum. Checking of tightness of all electrical connections in Aux. contact Block and Control T.B., checking and adjustment of trip and close levers and coils, checking of all alarms & indicators, checking of electrical & mechanical operation of circuit breaker including Local / Remote operation with all cost of men, materials, misc. consumables and T & P etc. required for the job. (i) 33KV Dargah Kichhauchha(Formerly Baskhari) feeder Stelmec Ltd. make last overhauling since commissioning date 26/02/2018 (ii) 33KV Kalyanpur feeder Stelmec Ltd. make last overhauling since commissioning date 19/09/2016

alfa engineering

SWITCHGEAR AND TRANSFORMER CARE CENTRE

MAYA DEVI CONSTRUCTION