... insulation level1min power frequency withstands voltagepole to pole, pole to groundkv24, 32, 42fracture to fracturekv24, 32, 48lightning withstands voltage ... (peak)pole to pole, pole to groundkv40, 60, 75fracture to fracturekv46, 70, 85Protection degreeEnclosure is ... convenient for standing against the wall so as to save space.8) Installation of current transformer:a. ...