Feature:1. [Automatic Power Off] The over under voltage protector automatically cuts off power when overloaded, ensuring normal power supply within the specified range and preventing overvoltages and undervoltages.2. [Rapid Response] Featuring sensitive internal components, the 3 phase voltage protector offers a quick response, eliminating the risk of overvoltage and undervoltage.3. [Auto Reset Function] This voltage protective device features an automatic reset function to prevent long term power outages, ensuring your devices are always protected.4. [Digital Display] The DIN rail voltmeter ammeter shows real time working voltage and current, providing an easy and quick way to monitor the power conditions of your devices.5. [Simple Installation] With its standard DIN rail installation, the overvoltage protector ensures a quick and stable setup, making it an ideal solution for many environments and applications.Specification:Item Type: Over Under Voltage ProtectorMaterial: PC flame retardantModel: STVP 935ARated Power Supply Voltage: AC220V, AC380VWorking Voltage Range: AC80-400V (AC220V), AC140-700V (AC380V), 3 phaseRated Frequency: 50 60HZCurrent Setting Range: 1-80AOvervoltage (>U) Setting Range: 230-300V (AC220V), 390-500V (AC380V)Undervoltage (>U) Setting Range: 210-140V (AC220V), 370-260V (AC380V)Rated Current: 80A>U and <U Tripping Delay: 0.1-30sReset Startup Delay: 1-500sVoltage Measurement Accuracy: 2%Rated Insulation Voltage: 400VOutput Contact: 3NOElectrical Life: 100,000 timesMechanical Life: 1,000,000 timesProtection Grade: IP20Pollution Degree: 3Altitude: 2000mOperating Temperature: -10 to 50Humidity: 50% at 40 (Non condensing)Storage Temperature: -10 to 55Note: The voltage displayed between the live wire and neutral wire is 220V, and the voltage displayed between the live wires is 380V.Package List:1 x Over Under Voltage Protector1 x User Manual