(1) Check whether the connecting rod is broken or deformed.
(2) If it is a current limiting circuit breaker, check whether the angle between the detachable connecting rods of its disassembly mechanism is deformed.
The manually operated circuit breaker cannot be closed
(1) Check whether there is no voltage on the undervoltage release, and replace the coil if necessary.
(2) Check whether the clamping device of the armature is deformed, and adjust the spring if necessary.
(3) Check whether the energy storage spring is deformed and causes the spring force to decrease, and replace it if necessary.
(4) Check whether the reaction force of the reaction force spring is too large.
(5) Check whether the connecting rod of the manual release is deformed.
(6) Check whether the leakage circuit breaker line is leaking or grounded