outdoor Hight vacuum circuit breaker Ambient temperature -40 tem. ~ +40 tem. The elevation does not surpass 2000mm outdoor vacuum circuit breaker outdoors high vacuum circuit breaker OutlineSC40301 - the 12G/T630 - 12.5/16/20 outdoors high vacuum circuit breaker is the three phase ac outdoors high-voltage switch equipment, mainly uses in the 12KV rank, nominal current 630A, the nominal frequency ...