The role of Mini Circuit Breaker

Miniature circuit breakers are used to switch on and off the circuit, it not only can switch on and off the normal working state of the circuit, but also can break the presence of faults in the circuit, which is the most serious situation of short circuit.

Miniature circuit breaker consists of the following main components:

1 breaking contact connection. It is composed of a fixed contact and a movable contact.

2 is composed of a metal cylinder or a device consisting of a dielectric cylinder, which can be installed with breaking contact connection and arc extinguishing device and a transmission device.

3 drives the contact transmission device.

4 arc extinguishing equipment. Commonly used Miniature circuit breaker circuit is the mechanical method of small breaker moving contact and the fixed contact separate. The closing is used instead of mechanical motion so that the movable contact and the fixed contact is closed. The connecting and breaking load circuit operation, a fixed contact and a movable contact between will generate electric arc. The process of breaking arc generated much more serious than the closing process. When breaking a large current, especially breaking short circuit, arc, disconnect circuit is often very difficult.

In the modern structure of the miniature circuit breaker, arc extinguishing principle is common. In the electrical current flowing through the inherent in zero (i.e. natural zero ). Strong go free. This strong to free the effect by miniature circuit breaker arc extinguish device to complete.