Features 【Main Function】: Using this device to protect your house electrical equipment, which will turn on quickly within nanoseconds when there is a surge overvoltage, and introduce the surge overvoltage into ground. 【Fault Indication】: Designed with indication window, which effectively reflect the working status of the device, green color means normal, red color means fault, convenient for timely maintenance. 【High Performance】: Adopt insulation wiring terminal, more reliable and safe, with quick response speed and strong carrying capacity, prevent household power grid from excessive impact. 【High Safety】: This surge protector is fire and corrosion resistance, supports hot line operation and is easy to use. 【35mm Rail Installation】: This surge protector is modular designed, supports 35mm electrical guide rail installation, easy to mount. Specification: Item Type: Surge Protective Device Material: PC Color: White Maximum Discharge Current (Imaximum): 80KA Nominal Discharge Current (In): 40KA Protection Level (Up): 2.2KV Protection Grade: IP20 Response Time: ≤ 25ns Maximum Wire Diameter: 35 hard wire or stranded wire (mm²） Recommended Connection: 4-25 (mm²） Installation Method: 35mm electrical guide rail installation Ambient Temperature: -40℃ to +80℃ Main Structure and Working Principle: 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. Package List:1 x Surge Protective Device Package List 1 x Surge Protective Device