... vacuum circuit breaker, vacuum contactor, switchgear, power distribution system etc in China since 1969s. We are the national second grade calculation ... . The product range currently comprises vacuum interrupters for circuit-breakers in the range from 12KV to 40.5KV with short-circuit ... to 12KV, our products has been passed the type test in India. We produce 200,000 pcs VI per year, our price ...