Item Type: Surge Protection Device Rated Power Supply Voltage: AC220V Rated Power Frequency: 45~65Hz Rated Current: 63A Voltage Display: Yes Current Display: No Overvoltage Action Value Setting Range: 230V~ 300V (factory default 275V) Setting Range of Undervoltage Action Value: 145V~ 210V (factory default 175V) Over/under Voltage Action Delay Time: 0.5s Overcurrent Action Value Setting Range: No Overcurrent Action Delay Time: No Hysteresis Rate: 5% (set value of voltage\current) Power-On Delay Time: 2s Reset Delay Time: 2~900s (factory default 30s) Measurement Error: 2% Delay Error: 10% IP Rating: IP20 Pollution Degree: 3 Electrical Life: 100000 Mechanical Life: 1000000 Altitude: 2000m Working Environment Temperature: -20~ 55 Allowable Relative Humidity: 50% (40) (no condensation) Rail Standard: Width: Approx. 35mm / 1.4in (IEC/EN60715)