REPAIR/ MAINTENANCE OF 33 KV AND 11KV HT CONTROL EQUIPMENT, TRANSFORMERS, SWITCHGEARS AND ALLIED WORKS AT VARIOUS LOCATION OF SHILLONG UNDER GE SHILLONG

M&L for Filtration and dehydration of transformer oil of distribution transformers indoor/outdoor type of 11/0.433 KV, 63 kVA to 500 kVA and Power transformer of 33/11 kV, 2.5 MVA minimum three cycle to achieve di electric strength of 40 kV for 1 minute at 2.5 mm gap as per relevant IS with portable filtration plant, testing of the oil break down voltage before filtration and after filtration complete all as specified an directed. Note : (i) Centrifuging Machine with all T&P and testing machine of oil required for dehydration is arrange by contracter. (ii) Oil required for topping up the transformer will be measured & paid separatly.

Supply, replacement and topping up transformer oil HV grade as per IS 335 of 1993 Part II having dielectric strength of not less than 40 KV in the transformer at various locations complete all as specified an directed.

M&L for taking out old unserviceable defective HV bushings on site from outdoor/indoor type distribution transformers of 11/0.433 kV and 63 KVA to 500 kVA and Supply and fix porcelain bushing with heat resistant gasket complete all as specified and directed.

M&L for taking out old unserviceable defective LV bushings on site from outdoor/indoor type distribution transformers of 11/0.433 kV and 63 KVA to 160 kVA and Supply and fix porcelain bushing with heat resistant gasket complete all as specified and directed.

M&L for taking out old unserviceable defective LV bushings on site from outdoor/indoor type distribution transformers of 11/0.433 kV and 200 KVA to 500 kVA and Supply and fix porcelain bushing with heat resistant gasket complete all as specified and directed.

Supply and fix in repairs brass terminal stud, both end threaded complete with double nuts & washers including distance piece both sides and heat resistance gasket suitable for HV side 11000 volts grade for 63 KVA to 750 KVA capacity of outdoor/indoor type transformer complete all as specified and directed.

Supply and fix in repairs brass terminal stud both end threaded complete with double nuts & washers including distance piece both sides and heat resistance gasket suitable for LV side 415 volts grade for 63 KVA to 160 KVA capacity of outdoor/indoor type transformer complete all as specified and directed.

"Supply and fix in repairs brass terminal stud both end threaded complete with double nuts & washers including distance piece both sides and heat resistance gasket suitable for LV side 415 volts grade for 200 KVA to 500 KVA capacity of outdoor/indoor type transformer complete all as specified and directed.

M&L for servicing/overhauling, decorbonising, calibration complete with primary and secondary tests of 11 kV (panel with breaker + Relay) and setting of Relay parameters VCB of capacity 630 Amps, indoor type, taking shut down from MRS and disconnecting incoming & out going cables, control cables from VCB and replacement of un-serviceable spares, greasing of revolving assembly in VCB chamber, spring charging mechanism including decorbonising the VCB panel and check servicability all as specified and directed: (i) Spare parts/components required for replacement of above shall be measured and paid separately (ii) Unit rate quoted against this item shall also include labour required for fixing of replaced items. (iii) For item No. 10.00 to 31.00 fixing charge of items are considered in item No. 9.00. (iv) Contractor will submit primary and secondary test record at the time of calibration of HT VCB, TR control panel. The rate quoted by tender shall deemed to include the cost of this provision incl T&P required for injecting regulated high current.

Supply only Isolating contact 800A set of 12 Complete all as specified and as directed.