1. After the circuit breaker is connected, it is necessary to check whether the circuit is connected correctly. If the circuit breaker can break the circuit correctly, it means that there is no problem with the installation of the circuit breaker and it can be used normally. On the contrary, if it cannot be broken correctly, it is necessary to check the specific line problems and repair them in time.

2. After the circuit breaker leaves the factory, its internal leakage and overload functions are set. No matter what reason, individuals can't adjust the circuit breaker, otherwise its performance will be reduced, so it can't normally protect the line safety. In addition, it is necessary to check the button of the circuit breaker to see whether the breaking of the circuit breaker can be controlled to ensure safe use.

3. When there is a fault in the circuit, the circuit breaker will break by itself. At this time, it is necessary to find the cause of the fault in time and repair it. If the circuit breaker is disconnected due to the short circuit of the line, it is necessary to carefully check the contact of the circuit breaker to see if it is burnt out. If so, it shall be replaced in time.