Vacuum Circuit Breakers

A vacuum circuit breaker is a type of circuit breaker where the arc quenching takes place in vacuum. The technology is suitable for mainly medium and high voltage application. developed but not commercially viable. The operation of opening and closing of current carrying contacts and associated arc interruption take place in a vacuum chamber also known as vacuum interrupter. The vacuum interrupter consists of a steel arc chamber in the center symmetrically arranged ceramic insulators. The vacuum pressure inside a vacuum interrupter is normally maintained at 10- 6 bar. Contacts design styles include transverse magnetic field( TMF) and axial magnetic field (AMF).