... need adjust,long life 3)reliable 1, Product Name: Indoor high voltage Vacuum Circuit Breaker 2, Product Type:CLZN63-12(VS1) 3, Product ... Introduction CLZN63-12(VS1) Vacuum Circuit Breaker is adopt advanced CAD/CAM/CAE design and produce technology ... high voltage products developed by our company .This circuit breaker is suitable for AC 50HZ,rated voltage 12KV and below power , ...