What is vacuum circuit breaker?
31 Jul.,2025
Principle of vacuum circuit breaker
A breaker which used vacuum as an arc extinction medium is called a vacuum circuit breaker. In this circuit breaker, the fixed and moving contact is enclosed in a permanently sealed vacuum interrupter. The arc is extinct as the contacts are separated in high vacuum. It is mainly used for medium voltage ranging from 11 KV to 40.5 KV.
Vacuum circuit breakers are widely used in metal clad switchgear like KYN28 switchgear, KYN61 switchgear for 12kv, 24kv, 35kv in power systems.
