Troubleshooting Steps You Must Know for Circuit Breaker Trip Failure

2025-11-12 13:45:15

When dealing with a circuit breaker that fails to trip, the first step is to check the control voltage of the breaker. Ensure that the control power supply is functioning properly and that the voltage is within the specified range. At the same time, verify that the switchgear terminals are not loose or damaged.

Next, inspect the operating mechanism to determine whether it is jammed; clean any internal dust and lubricate the moving parts. Then, check the protective relays to see if there is any malfunction or improper setting that might be causing the issue.

In addition, observe the system load conditions to determine whether an overload situation is contributing to the failure to trip. During the troubleshooting process, if any signs of malfunction are found, promptly adjust or replace the relevant components to ensure safe and reliable operation of the equipment.