11 KV Vacuum Interrupter for Vacuum Circuit Breaker Panel. Schneider and other brand we have Vacuum Circuit Breaker Definition: A vacuum circuit breaker is defined as a type of circuit breaker where arc quenching occurs in a vacuum, mainly used for medium voltage applications. Vacuum Interrupter Structure: The vacuum interrupter, essential for VCB operation, consists of a steel arc chamber and ceramic insulators with a vacuum maintained at 10^-6 bar. Contact Material: The material used for current-carrying contacts, typically copper-chromium (Cu/Cr), is crucial for the VCB’s performance. Advantages of VCB: Vacuum circuit breakers have a long service life, minimal maintenance, no fire hazard, and are environmentally friendly.
