Common use of CT and PT Clause in Contracts

CT and PT. Routine, scheduled, preventive and Breakdown maintenance of 33KV and 11KV Current transformers and potential transformers as per OEM manual. • Checking for oil leaks & oil levels. • Visual inspection of bushings for any damage and earthing. • Check earth connections. • Measure IR Values as per schedule and maintain record. • Checking of primary jumper, clamp connectors & primary connections of CT/PT. • Checking and tightening of jumpers & connectors. • Checking earth connections of secondary circuits. • Checking and tightening of secondary circuits. • Cleaning of bushings and oil level indicators. • Maintenance of CT JB/PT JB. • Measurement of voltages at marshalling box & control room in case of CT/PT. Isolators :- • Cleaning of Contact S& Aux. Contact, Greasing in the control mechanism. • Routine, scheduled, preventive and Breakdown maintenance of 33KV and 11KV Isolators as per OEM Manual. • Checking of Earth switch copper flexible. • Check earth connections of earth blade. • Cleaning of insulators & checking for cracks in the insulators. • Cleaning of main contacts, arching horns, earth blade. • Changing of male/Female or moving/fixed arm, changing of connectors/hardware and attending all the incidental troubles to ensure smooth operation of the Isolators (Spares by BHU). • Checking to ensure all the lamp are glowing (Spares by BHU). • Necessary ckt checking &Motor checking & setting to put the remote operation in service.

CT and PT. Routine, scheduled, preventive and Breakdown maintenance of 33KV and 11KV Current transformers and potential transformers as per OEM manual. • Checking for oil leaks & oil levels. • Visual inspection of bushings for any damage and earthing. • Check earth connections. • Measure IR Values as per schedule and maintain record. • Checking of primary jumper, clamp connectors & primary connections of CT/PT. • Checking and tightening of jumpers & connectors. • Checking earth connections of secondary circuits. • Checking and tightening of secondary circuits. • Cleaning of bushings and oil level indicators. • Maintenance of CT JB/PT JB. • Measurement of voltages at marshalling box & control room in case of CT/PT. Isolators :- • Cleaning of Contact S& Aux. Contact, Greasing in the control mechanism. • Routine, scheduled, preventive and Breakdown maintenance of 33KV and 11KV Isolators as per OEM Manual. • Checking of Earth switch copper flexible. • Check earth connections of earth blade. • Cleaning of insulators & checking for cracks in the insulators. • Cleaning of main contacts, arching horns, earth blade. • Changing of male/Female or moving/fixed arm, changing of connectors/hardware and attending all the incidental troubles to ensure smooth operation of the Isolators (Spares by BHU). • Checking to ensure all the lamp are glowing (Spares by BHU). • Necessary ckt checking && Motor checking & setting to put the remote operation in service.

CT and PT.  Routine, scheduled, preventive and Breakdown maintenance of 33KV and 11KV Current transformers and potential transformers as per OEM manual. •  Checking for oil leaks & oil levels. •  Visual inspection of bushings for any damage and earthing. •  Check earth connections. •  Measure IR Values as per schedule and maintain record. •  Checking of primary jumper, clamp connectors & primary connections of CT/PT. •  Checking and tightening of jumpers & connectors. •  Checking earth connections of secondary circuits. •  Checking and tightening of secondary circuits. •  Cleaning of bushings and oil level indicators. •  Maintenance of CT JB/PT JB. •  Measurement of voltages at marshalling box & control room in case of CT/PT. Isolators :- •  Cleaning of Contact S& Aux. Contact, Greasing in the control mechanism. •  Routine, scheduled, preventive and Breakdown maintenance of 33KV and 11KV Isolators as per OEM Manual. •  Checking of Earth switch copper flexible. •  Check earth connections of earth blade. •  Cleaning of insulators & checking for cracks in the insulators. •  Cleaning of main contacts, arching horns, earth blade. •  Changing of male/Female or moving/fixed arm, changing of connectors/hardware and attending all the incidental troubles to ensure smooth operation of the Isolators (Spares by BHU). •  Checking to ensure all the lamp are glowing (Spares by BHU). •  Necessary ckt checking &Motor checking & setting to put the remote operation in service.