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What happens if the circuit breaker fails to close after tripping?

Almost everyone has experienced a circuit breaker tripping, and there are certainly not a few people who have seen it fail to close after a trip. People often ask why the gate will not close (can’t move)? In fact, for household users, there are only two possibilities for household small circuit breakers to fail to close.

circuit breaker

Circuit leakage

For users who have installed a leakage circuit breaker, once there is a leakage in the circuit, the leakage protector sends a signal to cause the circuit breaker to trip actively. In this case, it is generally impossible to close. It is also very simple to judge whether the circuit breaker cannot be closed due to leakage. On the leakage circuit breaker, there will be a button, next to the button is written “Press before closing” in small letters.
When the circuit breaker trips due to leakage, this button will protrude. On the one hand, it is to remind you that there is a leakage in the circuit. On the other hand, it is to prevent the user from closing the switch without knowing it, causing electric shock to the circuit user. If you want to close, just press this button (under normal circumstances, this button and the entire panel are on the same plane).
As mentioned above, “generally it cannot be closed”, so what is unusual? In addition to the common reset button prompting leakage, there are some brands or models of circuit breakers that use the display screen to prompt leakage. In the position of the reset button, replace it with a display screen. Under normal circumstances, the display screen is green (or yellow), when the leakage trip, the display screen turns red. This kind of leakage circuit breaker can be closed directly after the leakage trip.
After the leakage trip, two points should be paid attention to:
1. After the leakage trip, it is allowed to close under the premise of ensuring safety;
2. After the circuit breaker prompts leakage, it proves that there is a leakage fault in the circuit, and the electricity should be continued after the fault has been eliminated.

circuit breaker

short circuit

Whether it is a leakage circuit breaker or an ordinary circuit breaker, when a short circuit occurs in the circuit, it cannot be closed. Short-circuit trip. The cause of the trip cannot be directly observed from the circuit breaker. After troubleshooting the circuit breaker, confirm that it is not due to leakage. Basically, it can be determined that there is a short-circuit fault in the circuit. There is another feature of short-circuit faults-common multi-level circuit breakers trip at the same time.
Short-circuit faults are more harmful, and all short-circuit faults must be completely eliminated before attempting to close.

Post time: Nov-21-2022