Feature: 1. Flexible Settings: This voltage transfer switch allows you to freely set the priority order of the mains, generator and inverter. You can set the voltage threshold for switching to automatically switch in case of undervoltage or overvoltage. 2. Multiple Protection: This automatic transfer switch can provide under voltage, over voltage and over current protection to ensure the safety of your electrical equipment. 3. LCD Display: This electrical selector switch features 4 LCD screens that provide real time voltage readings for each power source, as well as the voltage and current of the power source currently in use, making it easy to monitor circuit conditions in real time. 4. Excellent PC Material: This generator changeover switch is made of excellent PC material, which is sturdy and wear resistant, not easy to be damaged, and flame retardant. 5. Wide Application: This 3 phase voltage transfer switch has a wide range of applications and can be used in hotels, shopping malls, homes, dormitories and so on. Specification: Item Type: 3 Phase Voltage Transfer Switch Model: STVP 935S Material: Flame Retardant PC Rated Power Supply Voltage: AC220V Operating Voltage: AC80-400V (Single Phase) Rated Frequency: 50, 60HZ Rated Current (In): 100A Maximum Operating Current (Imax) (Within 10 Minutes): 60A Maximum Load Power: 22KW Current Setting Range (>A): 100A Overvoltage Setting Range (>U): 230-300V (Default: 270V) Undervoltage Setting Range (Reset or Startup Delay: 1-30s (Default: 1s) Voltage Measurement Accuracy: 2% (Within 2% of the overall range) Rated Insulation Voltage: 400V Output Contact: 1NO Electrical Life: 100,000 Times Mechanical Life: 1,000,000 Times Protection Level: IP20 Pollution Degree: 3 Altitude: ≤2000m Operating Temperature: -50℃-55℃ Humidity: 50% at 40℃ (Non Condensing) Storage Temperature: -30℃-70℃. Package List: 1 x 3 Phase Voltage Transfer Switch 1 x Manual