... life 3)reliable 1, Product Name: Indoor high voltage Vacuum Circuit Breaker 2, Product Type:CLZN63-12(VS1) 3, Product ... high voltage products developed by our company .This circuit breaker is suitable for AC 50HZ,rated voltage 12KV and below power ... products using the leading manufacturers of vacuum interrupters,maintenance-free ,high reliability ,suitable for frequent operation and high interruption.3 ...