Product Type: KYN28A(GZS1)-12(Z) Main Technical Parameters: Rated voltage: 12kV Rated current: 630~1250A Max break current: 31.5kA vacuum handcart type (medial) circuit-breaker(VS1,VD4), combined with types of ring main unit to ensure short-circuit protection. Main Service Range: mainly used in user secondary distribution station and package substation.