ZN28-12series vacuum circuit breaker as specified voltage 12kV, three-phase exchange 50Hz high pressure switchgear in the one. Products accord with GB1984-89 standard, this product ensemble architecture and operating organization an organic whole installer switch noumenon separates from operating organization and installs two kinds of forms for switch noumenon. An organic whole type structure Namely a basic model of ZN28-12, Divide style structure a ZN28A-12type, it should be in various kinds of regular type switch cupboards to be right, such as GG-1A(Z), XGN2A10(Z), etc.