... vacuum breaker 1.24kV,630A,1250A 2.long life,reliable 3.passed test,ISO GVS9-24 series embedded poles type high-voltage ... conditions'; and IEC60694, IEC6227-100 and other related standards.GVS9-24 series solid seal type high voltage vacuum circuit breaker adapt ... .The use of environmental conditions:1. Altitude: not exceed 2000m.2.Ambient temperature: not higher than +40 °C, not less than ...