The automatic over-voltage and under-voltage protector is suitable for three-phase AC 380V, 50/60Hz, with a rated working current of 63A or less. Its main feature is to instantly cut off the power supply when over-voltage or under-voltage conditions occur, protecting electrical equipment from damage. The protector automatically restores power when the circuit voltage returns to normal levels.Color: gray white Material: PC plastic Functions: 1. Over-voltage protection 2. Under-voltage protection 3. Automatic reset 4. Voltage display (voltage measurement) 5. Three-phase unbalance protection 6. Phase sequence protection (reverse phase protection) 7. Break protection 8. Phase failure protection Product Parameters: 1. Model number: TOVPD3 2. Power supply: 3 x 230V / 400V AC 50/60Hz 3. Max loading power: 63A 4. Over-voltage protection value range: 230V~300V adjustable (default: 270V) Over-voltage value range: 225V~295V (default: 265V) Over-voltage protection action time: 0.1~30 seconds (default: 1 second) 5. Under-voltage protection value range: 140V~210V adjustable (default: 170V) Under-voltage value range: 145V~215V (default: 175V) Under-voltage protection action time: 0.1~30 seconds (default: 1 second) 6. Three-phase voltage unbalance protection value: 5-95V adjustable, OFF option available 7. Delay time after power-on: 1~500 seconds (default: 10 seconds) 8. Delay time: 1~500 seconds (default: 30 seconds) 9. Installation: 35mm DIN rail Package Contents: 1 x 3 Phase Voltage Relay Note: Light and different displays may cause slight variations in the color of the item compared to the real thing. Measurement error is permitted within +/- 1-3cm.