The circuit breaker is composed of internal accessories and external accessories. The internal accessories include auxiliary contacts, alarm contacts, shunt releases and undervoltage releases.
A circuit breaker is a switching device capable of closing, carrying and breaking the current under normal circuit conditions or under abnormal circuit conditions within a specified time.
It is known that switches can be divided into different types according to different classification methods. At this level we will mainly understand the difference between load switches and isolate switches.