... second-stage load switches, back-up protection fuse and plug-in fuse; the low voltage side can install the control ... , strong overload ability, and safe. It can be used in the new residential, green belts, parks, railway station, docks ... %4Vector group Yn115Rated insulation levelLightning impulse withstand voltage (full wave, peak)KV75Power frequency withstand voltage 1minKV356LV side power frequency ...