... 1250A 2.long life,reliable 3.passed test,ISO GVS9-24 series embedded poles type high-voltage vacuum breaker ,apply ... three-phase AC power system, widely used in power plants, transformer substation, petrochemical, metallurgical, manufacturing, airport And communities , use ... and IEC60694, IEC6227-100 and other related standards. GVS9-24 series solid seal type high voltage vacuum circuit breaker adapt ...