For single phase operation, the model VI vacuum interrupter consists of a single vacuum bottle mechanically linked to a spring-assisted operating mechanism. For three phase operation, the single phase mechanisms are mechanically linked together with an external operating handle assembly. In both cases, once initiated, the interrupting time of the vacuum bottles is approximately 3 cycles (50 mseconds). A position indicator (open-green, closed-red) is mounted to the moving contact and is visible through a viewing window for positive contact position. The mechanical linkage assembly provides a “trip-free” operation permitting the vacuum interrupter to interrupt independent of the operating handle if closing into a faulted circuit.