bids are invited for operation and maintenance of 33 kv sub station , testing of transformer oil , filtration and dehydration of transformer oil , supply of silica gel , supply of transformer oil , testing and calibration of 33 kv ht vcb over current cum earth fault relay , testing and calibration of 33 kv ht vcb master trip relay , testing and calibration of 33 kv ht vcb panel trip supervision relay , testing and calibration of 33 kv ht vcb panel timer relay , testing and calibration of 33 kv ht vcb panel under voltage relay , testing and calibration of 33 kv ht vcb panel supervision auxiliary relay for trip and alarm , testing and calibration of 33 kv ht vcb 7 sr numerical relay , half-yearly maintenance and servicing of 33kv, 1250a vcb , half-yearly maintenance and servicing of 415v, 4 pole, 2500amp acb , half yearly testing and calibration of relays associated with acbs in boq no. 14 , half-yearly maintenance and servicing of 415v, 4 pole, 1250 amp acb , half yearly testing and calibration of relays associated with acbs in boq no. 16 , half-yearly maintenance and servicing of 415v, 4 pole, 1000 amp acb , half yearly testing and calibration of relays associated with acbs in boq no. 18 , half-yearly maintenance and servicing of 415v, 4 pole, 800amp acb , half yearly testing and calibration of relays associated with acbs in boq no. 20 , supply of power pack with battery back charger , sitc acb relay , transportation of hsd oil , painting of lt panels and feeder pillars and pipe line , painting of street light poles , pollution test and stack monitoring and noise level , operation and maintenance of stp , supply of chlorine , supply of urea , supply of dap , supply of nutrients , testing of sewage inlet and tretaed water , replacement od sand stone aggregate , rewinding of 7.5kw, 415v, 3 ph induction motor , repair and overhauling of 7.5 kw twin lobe blower , rewinding of 1 hp, 1 ph submersible motor , rewinding of 3 hp-3ph submersible motor , rewinding of 5 hp-3ph submersible motor , rewinding of 1.75 hp submersible motor , rewinding of 1 hp capacity monoblock motor , rewinding of 5 hp capacity monoblock motor , rewinding of 12.5hp capacity monoblock motor , replacement of worn out , amc of fire hydrant and sprinkler system , cmc of intelligent addressable fire alarm at mssr , cmc of conventional type fire alarm system , cmc of intelligent addressable fire alarm at cargo building , dsr 2022 total quantity : 29416