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 that when the circuit experiences over-voltage or under-voltage issues, the product instantly cuts off the power supply to protect electrical equipment from damage. Additionally, the protector automatically restores power when the circuit voltage returns to normal.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: 230V300V adjustable (default: 270V) Over-voltage action time: 0.130 seconds (default: 1 second) 5. Under-voltage protection value range: 140V210V adjustable (default: 170V) Under-voltage action time: 0.130 seconds (default: 1 second) 6. Three-phase voltage unbalance protection value: 595V adjustable, OFF option available 7. Delay time after power-on: 1500 seconds (default: 10 seconds) 8. Delay time before reconnection: 1500 seconds (default: 30 seconds) 9. Installation: 35mm DIN rail Package Contents: 1 x 3-Phase Voltage Relay Note: The package includes only the items listed above. Other accessories are not included. Lighting and display differences may cause slight variations in color compared to the actual item. Measurement error allowance is +/- 13 cm.