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 the circuit experiences over-voltage or under-voltage conditions, 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 recovery 4. Voltage display (voltage measurement) 5. Three-phase ampere unbalance protection 6. Phase sequence protection (reverse phase protection) 7. Neutral line 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 recovery 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 recovery 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. Recovery 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. Other products are not included. Lighting and display differences may cause slight variations in the color of the item shown in the picture compared to the actual product. Measurement may vary by +/- 1–3cm.