Adjustable Voltage Current Protector 3 Phase Digital Display Automatic Recovery Voltage Protector Relay AC220 380V 63A 1-63A Item Type: Adjustable V A Protector Material: PC Rated Power Supply Voltage: AC220V, AC380V Operating Voltage Range: AC80-400V (three phase), AC140-700V (three phase) Rated Frequency: 50, 60HZ Overvoltage (Greater Than U) Setting Range: 230-300V 390-500V Undervoltage (Greater Than U) Setting Range: 210-140V 370-260V Greater Than U and Less Than U Trip Delay: 0.1 to 30s Reset, Start Delay: 1 to 500s Voltage Measurement Accuracy: 2% Rated Insulation Voltage: 450V 700V Output Electric Shock: 3NO Electrical Life: 100000 Times Mechanical Life: 1000000 Times Protection Grade: IP20 Pollution Degree: 3 Altitude: Less than or Equal to 2000m / 6561.7ft Operating Temperature: - 5 ℃ to 40 ℃ Humidity: Less than or Equal to 50% is 40 ℃ (non condensing) Storage Temperature: - 25 ℃ to 55 ℃