The interrupter adoption porcelain and ceramics flat makes to insulate the outer shell. Contact is CuCr50 metal alloy material advanced technique of coil cross-electromagnetic construction, break the discharge big. Insulate the level high, breaking the ability strong the life span is long, maintenance is simple, no explosion dangerous, no contaminate and the noise is low. The vacuum circuit-breaker main used electric power, machine, coalmine, chemical engineering, Petroleum metallurgy etc. Power transmission system used control with protect. More than keeping with at the multifarious operation.