bids are invited for material and labour for routine preventive breakdown maintenance and repairing of 11 kv rating non draw out 3 way ring main unit , opening the rmu from panel and carry out the cleaning dust , repairing and checking the ac dc wiring circuit including control fuses ct and pt fuse and circuit jack , replacement and testing of defective unserviceable electrical mechanical parts as per requirement , reinserting the vcb in panel and setting of all types of relays as per load , doing all type of standard tests and calibration of different type of relays such as over current and earth fault relay , supply and fix in replacement making connection and testing of idmt numerical based overcurrent and earth fault protection relay , supply and fix cable end jointing kit for 11 kv grade cable for outdoor termination cold shrink type joint complete total quantity : 18