... interrupters embedded in resin poles Features: 1) The vacuum circuit breakers use vacuum interrupters embedded in resin poles 2) ... Specifications: 1) Rated voltage: 12/17.5kV 2) Rated current: 630, 1250, 1600, 2000, 2500, 3150A 3) Rated short circuit breaking current: 25 ... , 31.5, 40KA 4) Mechanical life: 30,000, 20,000, 10,000 times Medium Voltage Vacuum Circuit ...