a: Before maintenance, disconnect the isolating switch operation, energy storage technology, data signal switch power supply, release the isolating switch operation, and organize the actual operation of electric energy.

b: Check whether the appearance of the high-voltage switch cabinet isolating switch, knife switch and other mechanical equipment is deformed or damaged, check the upper and lower terminals, conductive soft connections and conductive clips of the isolating switch, and there is no burn, composite insulator and insulation layer.The surface of the magnetic pole (magnetic blow chamber) is clean and crack-free.If necessary, measure the loop resistance and AC withstand voltage test of the isolating switch.

c: Check whether the secondary terminal row of the high-voltage switch cabinet is in good contact, without looseness or burn marks.Check whether the posture of the electronic counter and position indicator is correct during the actual operation of the mechanism.Check whether the heating device is intact.

d: Check whether the screws are tightened at all places and whether the cotter pins are firmly fixed.The transmission system components are not deformed or damaged, and the rolling bearings rotate flexibly.Apply grease to each rotating part and tighten the screws at each position.

e: Check whether the isolating switch is flexible, whether the reclosing spring meets the regulations, and whether the energy storage technology motor operates reliably.Manually open and close the isolating switch on site once, check whether the "energy storage technology", "reclosing" and "closing" signs are appropriate, and then conduct on-site and remote electrical actual operation experiments.

f: The isolating switch is flexible, the buckling amount meets the regulations and is intact; the circuit breaker schedule and overtravel schedule meet the product regulations; the opening and closing speed meets the product technical standards.The opening and reclosing time meets the product technical standards.The circuit breaker is improperly opened and closed, which meets the product technical standards.