Circuit breaker refuses to close the fault processing steps

To handle the circuit breaker rejecting the closing fault, it must be good at distinguishing the fault range. The processing steps are as follows:

1. First determine whether the circuit breaker is combined with the pre-volt fault line to cause a trip. The meter can indicate the impact swing caused by the short-circuit current during the closing operation and the sudden darkening of the illumination lamp. The voltmeter indicates a sudden drop to judge. . If it is determined that the line is faulty, isolate the fault area and then cast the circuit breaker.

2. If it is determined that it is improperly operated, check whether there is a lock-up insurance, whether the control switch is reset too fast or not, and whether the transfer switch is in the correct position.

3. Check if the operation closing power supply voltage is too high or too low, check whether the operation closing insurance is blown or poorly contacted, check whether the control switch and the auxiliary contact are in poor contact, whether the circuit is broken or the wiring is wrong.

4. Check if the operating mechanism is stuck and the auxiliary contacts and mechanism are not properly adjusted.

Generally, the gap between the connecting parts of the operating mechanism is unqualified, and it is necessary to inspect and replace the new high-hardness qualified parts.