Vacuum Circuit Breaker Operation. The working of vacuum circuit breakers is briefly explained below when the breaker operates the moving contact separates from the fixed contact and an arc is struck between the contacts. The vacuum circuit breaker also known as vacuum interrupter or vcb uses the arc quenching process in the vacuum as a switching medium.
The vacuum has the highest insulating strength. The vacuum circuit breaker also known as vacuum interrupter or vcb uses the arc quenching process in the vacuum as a switching medium. The production of the arc is due to the ionization of metal ions and depends very much upon the material of contacts.
A breaker which used vacuum as an arc extinction medium is called a vacuum circuit breaker.
The degree of vacuum is in the range of 10 7 to 10 5 torr. The vacuum circuit breaker also known as vacuum interrupter or vcb uses the arc quenching process in the vacuum as a switching medium. Vacuum circuit breaker is used in medium voltage switchgear for performing switching operations. The operation of switching on and closing of current carrying contacts and interrelated arc interruption takes place in a vacuum chamber in the breaker which is called a vacuum interrupter.
