Item Type: Surge Protective Device_x000D_Material: PC_x000D_Color: White_x000D_Maximum Discharge Current (Imaximum): 80KA_x000D_Nominal Discharge Current (In): 40KA_x000D_Protection Level (Up): 2.2KV_x000D_Protection Grade: IP20_x000D_Response Time: 25ns_x000D_Maximum Wire Diameter: 35 hard wire or stranded wire (mm2_x000D_Recommended Connection: 4-25 (mm2_x000D_Installation Method: 35mm electrical guide rail installation_x000D_Ambient Temperature: -40 to +80_x000D_Main Structure and Working Principle:_x000D_In a three phase four wire system, protectors are connected between three phase wires and one neutral wire to ground. Under normal circumstances, the protector is in a high resistance state, when the power grid deals with surge overvoltage due to lightning strike or other reasons, the protector will turn on quickly within nanoseconds, and introduces the voltage overvoltage into the ground, thus protecting the electrical equipment on power grid. When the surge voltage passes through the protector and disappears, the protector changes to a high resistance state again, so as not to affect the normal operation of the power grid.