... 1.24kV,630A,1250A 2.long life,reliable 3.passed test,ISO GVS9-24 series embedded poles type high-voltage ... breaker ,apply for rated voltage 24kV, frequency 50Hz three-phase AC power system, widely used in power plants, transformer substation, petrochemical, metallurgical ... fixed air-insulated switchgear cabinet. The product accordance to GB1984"AC high voltage circuit breakers';, DL/T403"12 ~ 40.5kV ...