HXGN1-12 Type of Ring-net vacuum breaker cubicle is a indoor ring-net power supply unit or end distributing equipment of AC. 3-phase, 12KV, 50Hz distributing system of enterprises or industries or high-buildings or schools or residence areas. the cubicle has capability of breaking or closing rated load current or idle-current of power transformer, as well as a certain distance racked lines, cable or current of capacitor bank