Item Type: DC Surge Protector_x000D_ Maximum Continuous Working Voltage: 1000VDC_x000D_ Discharge Current: 20KA(8/20s)_x000D_ Maximum Discharge Current: 40KA(8/20s)_x000D_ Limiting Voltage at Nominal Discharge Current: Less than or equal to 3.8KV_x000D_ Shell Material: Fireproof and flame retardant PC_x000D_ Installation: 35 Standard guide rail_x000D_ Protection Grade: IP20_x000D_ Commodity Description:_x000D_ 1. This series of surge protector is applicable to TT and IT with AC 50, 60Hz, 1000V and below The IT S, TN CS and other power supply systems can be used as the equipotential connection at the interface between LPZ1, LPZ2 and LPZ3. The design basis is in accordance with for IEC61643 1 and for GB8802.1. The shell is designed to be installed on 35mm electrical guide rail._x000D_ 2. The product has a built in failure release device. When the surge protector fails due to over current overheating and breakdown, the failure release device can automatically disconnect it from the power grid, and the visual warning indicator module changes from green (normal) to red (fault). The module with the protector can be replaced under working voltage.