The automatic over-voltage and under-voltage protector is designed for three-phase AC 380V, 50/60Hz applications with a rated working current of 63A or less. It provides instant power cutoff when over-voltage or under-voltage conditions occur, protecting electrical equipment from damage. The device automatically restores power when circuit voltage returns to normal levels.Color: Gray White Material: PC Plastic Features: 1. Over-voltage protection 2. Under-voltage protection 3. Automatic recovery 4. Voltage display (voltage measurement) 5. Three-phase current unbalance protection 6. Phase sequence protection (reverse phase protection) 7. Neutral line break protection 8. Phase failure protection Product Specifications: 1. Model Number: TOVPD 2. Power Supply: 3 x 230V / 400V AC, 50/60Hz 3. Maximum Load Current: 63A 4. Over-voltage Protection Range: 230V–300V (adjustable), default 270V Over-voltage Recovery Range: 225V–295V, default 265V Over-voltage Response Time: 0.1–30 seconds, default 1 second 5. Under-voltage Protection Range: 140V–210V (adjustable), default 170V Under-voltage Recovery Range: 145V–215V, default 175V Under-voltage Response Time: 0.1–30 seconds, default 1 second 6. Three-Phase Voltage Unbalance Protection: 5–95V (adjustable), OFF option available 7. Power-On Delay Time: 1–500 seconds, default 10 seconds 8. Recovery Delay Time: 1–500 seconds, default 30 seconds 9. Installation: 35mm DIN rail Package Includes: 1 x 3-Phase Voltage Relay Note: The package includes only the items listed above. Other accessories are not included. Due to lighting and display differences, the item's color may vary slightly from the images. Measurement may vary by +/- 1–3 cm.