this is a lightningproof device, on-grid inverter power prevent thunder box , single phase/ three phase power lightningproof Power series of lightning protection box (hereinafter referred to as lightning protection box), which apply to AC 50/60Hz, 380V, TT, TN-S, TN-C, and TN-CS below 380V, and other power supply systems, are mainly used in the areas of weather, transportation, post and ...