... interrupters embedded in resin poles Features: 1) The vacuum circuit breakers use vacuum interrupters embedded in resin poles 2) Embedding ... the interrupter in resin makes the circuit-breaker poles particularly sturdy and protects the interrupter against shocks ... current: 630, 1250, 1600, 2000, 2500, 3150A 3) Rated short circuit breaking current: 25, 31.5, 40KA 4) Mechanical life: 30 ...