1.AC Power System 2.High Voltage 12kV 50Hz 3. Indoor install 4. Vacuum Load Break Switch 5. Switch off the onload current FN16A-12 type vacuum switch is suitable for the power net with AC 50Hz rated voltage 6-12kV.When apply with the fuse and earthing switch, can be much more available for the protection. AC, High Voltage Indoor Vacuum Load Break Switch,12kV ,IEC62271,GB3804