Check and debug the voltage regulator, measuring device and control box.Repair the submersible pump and the cooling fan of coolers.Check the respirator and oil purifier, and replace the silicone when necessary.Inspections and cleaning for the air porcelain.Inspect expansion tank and oil level gauge.

Oil Filled Transformer MaintenanceOverhaul projects:Removal of the hanging core or hanging cover for each accessory.Analyze samples, and adjust oil level of casings and the transformer.Check the connection Single Dual Coil Latching Relay of the joints, valves and seal pads.Oil treatment of transformers.Regular inspections and test.Check and eliminate defects that have been found.Overhaul of iron core, core piercing screw, yoke beam, nail and ground piece.

Conduct measurement and test according to regulations.Drying of the transformer when necessary.Cleaning and maintenance of oil tank, casing, radiator, safe airway and expansion tank.Maintenance of winding, lead devices and other equipment.Maintenance of tap chargers.High-voltage test.

Testing of transformer equipment such as oil purifier, respirator, expansion tank capsule and releaser.Clean the casing and tighten the wiring bolts of each casing.Inspections and maintenance of gas relay and thermometer.Minor repairs:Clean the shells.Repair gas relay and thermometer.Clean the air porcelain.Clean and paint oil tank as well as accessories.Replacement of all seal pads and leaking test for components