Introduction of the working principle and function of circuit breaker in distribution box

The switch in the distribution box, that is, the circuit breaker, is used to connect, break and carry the rated working current, short circuit, overload and other fault currents in the circuit, and can quickly break the circuit and provide reliable protection in case of overload, short circuit, undervoltage and other conditions of the line and load.

Automatic switch, also known as low-voltage circuit breaker, can be used to connect and break load circuit in the distribution box, and can also be used to control infrequent starting motor. Its function is equivalent to the sum of the functions of knife switch, over-current relay, voltage loss relay, thermal relay and leakage protector. It is an important protective device in low-voltage distribution network.

Automatic switch has a variety of protection functions (overload, short circuit, undervoltage protection, etc.), adjustable action value, high breaking capacity, convenient operation, safety and other advantages, so it is currently applied in the distribution box.