The running transformer is routinely serviced once a year, if the oil-immersed transformer has been stopped, increase once maintenance before putting into use.
(1) Disconnect the low side of the circuit breaker, pull off the disconnector, hanging in the corresponding signs.
(2) Disconnect the load switch on the high voltage side of the transformer, close the grounding knife, and complete the switch safety insurance and hang the relevant identification card.
(3) Enter into the oil transformer room, first check whether the transformer in the power failure state, then pull the high-pressure isolation knife, check the shell, porcelain and lead with or without deformation, if there is damage should be replaced. Check the oil level, if the oil spill, should replace the pad. Check whether the silicone is effective, if there is discoloration or serious failure, should be replaced immediately.
(4) Re-tighten the lead terminals, pins, grounding screws; If there is loosening, put on a new spring washer, fastening screw.
(5) Check the transformer peripheral lighting, heat, dust removal equipment is intact, wipe the transformer body and porcelain dust with a clean cloth.
(6) Check the transformer high-pressure side of the load switch to ensure that the operation is flexible, good contact, the drive section is lubricated.
(7) Check the transformer room whether have the remaining tools, close the high-voltage side of the isolation switch, evacuate the scene.
In addition, dry-type transformers maintenance procedures is the same as oil-immersed maintenance.
