Item Type: Surge Protector_x000D_ Color: White_x000D_ Material: PC_x000D_ Maximum Discharge Current (Imaximum): 200KA_x000D_ Nominal Discharge Current (In): 100KA_x000D_ Protection Level (up): 3.0KV_x000D_ Protection Grade: IP20_x000D_ Response Time: Less Than or Equal to 25ns_x000D_ Maximum Wire Diameter: 35 Hard Wire or Stranded Wire (mm 2)_x000D_ Recommended Connection: 4 to 25 (mm 2)_x000D_ Installation Method: Approx. 35mm / 1.38in Electrical Guide Rail Installation_x000D_ Ambient Temperature: - 40 to +80 _x000D_ Main Structure and Working Principle:_x000D_ In three phase four wire system, three phase lines and one neutral line are connected to the ground with protectors. Under normal conditions, the protector is in the state of high resistance. When the power grid suffers from surge overvoltage due to lightning stroke or other reasons, the protector will immediately be turned on within nanoseconds, introducing the voltage overvoltage to the ground, thus protecting the electrical equipment on the power grid. When the surge voltage passes through the protector and disappears, the protector will change to a high resistance state again, so as not to affect the normal operation of the power grid.