The automatic over-voltage and under-voltage protector is designed for three-phase AC 380V, 50/60Hz systems with a rated working current of 63A or less. It provides instantaneous power cutoff when over-voltage or under-voltage conditions occur, protecting connected electrical equipment from damage. The device automatically restores power when 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. Maximum loading current: 63A 4. Over-voltage protection range: 230V–300V adjustable (default: 270V) Over-voltage trip range: 225V–295V (default: 265V) Over-voltage protection response time: 0.1–30 seconds (default: 1 second) 5. Under-voltage protection range: 140V–210V adjustable (default: 170V) Under-voltage trip range: 145V–215V (default: 175V) Under-voltage protection response time: 0.1–30 seconds (default: 1 second) 6. Three-phase voltage unbalance protection: 5–95V adjustable or disabled 7. Power-on delay time: 1–500 seconds (default: 10 seconds) 8. Power restoration 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. Lighting and display settings may cause slight variations in color representation. Measurement error is +/- 1–3 cm.