Solid-insulated Ring Main Unit Product NO.: MACO-12 Specification: 12kV-630A Core unit: First generation; Second generation Altitude: Lower than 1500 meter ; Higher than 1500 meter Operation: manual ; motor Rated short circuit breaking current:20kA ; 25kA Including the earthing switch: Yes ; No Operation Voltage: 24V ; 48V ; 220V Solution: vacuum circuit breaker/load switch ; disconnecting switch