The vacuum interrupter is an essential component in a vacuum circuit breaker and a load breaker switch. It can extinguishes the electrical arc when a section of power distribution line must be take out of the service to protect the electrical devices from damage of short circuit or overload. One vacuum interrupter is made up by two contacts sealed by one vacuum bottle, of which the vacuum bottle is made by glass or porcelain in medium voltage system. The bottle is the key part to create the vacuum arc interrupting environment.
A operating mechanism is an important component in vacuum circuit breaker, which is controlled by upstream protection relay or built in coils, to convert stored mechanical or electrical energy into the motion when the vacuum interrupter needs to separate or close. Commonly, a operating mechanism equips one or two springs to convert mechanical or electrical energy into potential energy temporary, and the spring will release when an electrical anomalies and faults occurred, such as short circuit or over load. It will trip rapidly and reliably when the electrical signal sent by upstream relays or inside coil.
