... poles 2) Embedding the interrupter in resin makes the circuit-breaker poles particularly sturdy and protects the interrupter against shocks, accumulation ... : 12/17.5kV 2) Rated current: 630, 1250, 1600, 2000, 2500, 3150A 3) Rated short circuit breaking current: 25, 31.5 ... ,000, 20,000, 10,000 times Medium Voltage Vacuum Circuit Breaker