1Main Purpose: This transfer switch allows for simultaneous connection of mains, generator, and inverter. When the main power supply fails or the voltage exceeds the set range, it automatically switches to the next power supply. 2Flexible Setting: This 3 phase automatic transfer switch allows you to freely set the priority order of mains, generator, and inverter, can set voltage thresholds for automatic switching in case of undervoltage or overvoltage. 3Circuit Protection: This transfer switch provides undervoltage protection, overvoltage protection, and overcurrent protection to ensure the security of your electrical equipment, with 2% voltage measurement accuracy. 4LED Display Screen: This automatic transfer switch is equipped with 4 LED screens, providing real time voltage readings for each power supply, as well as the voltage and current of the current power supply being used. 5Adjustable Parameter: Support transfer time, 130 second reset time, overvoltage and undervoltage protection threshold, overcurrent protection, and other parameter adjustments, to prevent power system damage. Item Type: 3 Phase Transfer Switch Model: STVP-935S Material: Flame Retardant PC Rated Power Supply Voltage: AC220V Working Voltage: AC80-400V (single phase) Rated Frequency: 50/60Hz Rated Current (Ie): 80A Maximum Working Current Imax (within 10 Minutes): 100A Maximum Load Power: 17.6KW Current Setting Range(>A): 80A Overvoltage Setting Range(>U): 230-300V (default 270V) Undervoltage Setting Range(