... serves as an indoor device and operates under the condition of rated 12/17.5KV three phase AC voltage and 50/60Hz ... a perfect product for frequent operating condition Specifications: 1) Rated voltage: 12/17.5kV 2) Rated current: 630, 1250, 1600, 2000 ... ) Mechanical life: 30,000, 20,000, 10,000 times Medium Voltage Vacuum Circuit Breaker