ZN63(VS1)-12 = ABB VD4 ZN63 (VS1) -12 indoor high voltage vacuum circuit breaker is a ... high reliability, maintenance-free, can be equipped with KYN28A-12 (GZS) and other handcart switch cabinet in the home ... not more than eight.5. No fire, explosion hazard, serious filthy, chemical corrosion, as well as places of intense ... 800/400(40KA)13Mechanical lifeTimes10000 ZN63(VS1)-12 vacuum circuit breaker