... no need adjust,long life 3)reliable 1, Product Name: Indoor high voltage Vacuum Circuit Breaker 2, Product Type:CLZN63-12(VS1 ... CAE design and produce technology ,it is a new type high voltage products developed by our company .This circuit breaker is ... leading manufacturers of vacuum interrupters,maintenance-free ,high reliability ,suitable for frequent operation and high interruption.3) It is has a ...