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 function is to instantly cut off the power supply when over-voltage or under-voltage conditions occur, protecting connected electrical equipment from damage. 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: 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 or OFF 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: The package includes only the items listed above. Light and display differences may cause slight variations in color between the image and the actual product. Measurement errors are permitted within +/- 1–3cm.