... dust. in the three-phase isolated neutral power supply system with rated voltage 10KV or 6KV, frequency 50Hz rated current 50A-400A, The ... measurement.Main technical parameters1. Rated Voltage: 10(6)KV2. Rated current:50, 100,150,200,300,400(A)3. Rated frequency ... : 50Hz4. Rated short-circuit breaking current (peak): 12.5KA 5. Allowed operating frequency: 300 times/hr ...