Circuit breaker: What is Auxiliary contact

What is Auxiliary contact? Auxiliary contacts (or switches) are supplementary contacts that are added to a circuit to protect the main contact. This accessory allows you to check the status of a Miniature Circuit Breaker or Supplementary Protector from a remote. Simply explained, it aids in remotely determining whether the breaker is open or closed. This device can be used for a variety of purposes other than remote status indication. breaker，switch， isolator 都有断开电路的作用。 然而breaker是断路器，一般叫 circuit breaker ，就是我们家里有时候会跳闸的地方 switch和isolator都是开关，但是在弱电，电子电路或我们平时物理课上学的电路里用的开关叫switch。 Trip Curve of MCB: The Trip Curve is a graphical representation of the circuit protection devices. Fuse, MCB’s, MCCB’s, supplementary protectors, motor protection circuit breakers, overload relays, electronic fuses, and air circuit breakers are all examples of circuit protection devices. The multiples of the current going through the miniature circuit breaker are represented on the horizontal X-axis. […] A solenoid is located inside a circuit breaker and is maintained at a specific voltage level to maintain the balance of the triggering mechanism. The switch is activated and the current flow is stopped when a fault in the circuit , such as an overload or short circuit , is detected.