FOR MAJOR OVERHAULING OF 220KV PNEUMATIC OPERATED, SF6 CIRCUIT BREAKER INSTALLED AT 220KV SUBSTATION NAUBASTA UNDER ETD-II, KANPUR.

Amount

Major overhauling including Attending SF6 gas leakage of R-Phase-pole mechanism of CGL make 145KV SF6 circuit breaker installed at 132KV bay of 220/132KV, 160MVA T/F-II.The job includes overhauling of complete mechanism assembly by opening of control valve assembly holding latch anti pumping pin opening and cleaning of pneumatic system cylinder shock absorber etc. cleaning and greasing of all these parts, opening of reservoir checking of electrical all connection and tightening them rectification of air leakage problem through NRV safety valve replacement of consumable spares as roller, control valve sheet, O-ring P-80, O-ring P-18, O-ring P-7,O-ring-P140 etc and other damaged ring of mechanism assembly if necessary rectification of gas leakage from 6mm & 12mm gas pipe assembly by replacement O-ring & brazing, checking & re-tightening of electrical connection satisfactory operation of breaker of the local & remote of the breaker installed at 220KV S/S Naubasta.

Complete dismantling of INGERSOL RAND make compressor installed with 145KV SF6 CB of 220/132KV, 160MVA T/F-II bay at 220KV S/S Naubasta and their through overhauling by way of cleaning and replacing all gaskets ( from manufactures tune up kit) draining of old lubricating oil ,cleaning of reservoir ,assembling the compressor after complete overhauling and commissioning the same including replacement of worn-out motor drive V-belt and filling up of lubricating oil in compressor reservoir with SAE 40 grade lubricating oil and testing all cost of materials ,T&P and labour .The work also includes oiling & greasing in mechanism & motor.

Providing and fixing of gas density monitor liquid filled 9’’ dia, 0 to 10Kg/sq.cm. Range suitable for SF6 type 145KV above circuit breaker.

Cost of installation, labour and fixtures such as socket, adapter for installation of above 145KV Circuit breaker.

Indra Enterprises (BID ID -4650599)

M/s Prakash & Brothers (BID ID -4650671)

SARASWAT ELECTRICALS (BID ID -4650522)