Features: 1. Overvoltage protection. Undervoltage protection 2. Overcurrent protection. Automatic reset 3. Voltage display (voltage measurement). Current display (current measurement) 4. Wattmeter kWh Energy Meter Power Consumption 5. Installation: 35mm DIN rail. Product Parameters: 1. Rated supply voltage: AC 220V 2. Operating voltage: AC 80-400V (single-phase) 3. Rated frequency: 50/60HZ 4. Electric current (A) setting range: 1-63A 5. Overvoltage (U) setting range: 230-300V 6. Undervoltage (Less than U) setting range: 210-140V 7. Kilowatt-hour protection value: 1-9999 8. Rated current: 63A 9. U and Less than U tripping delay time: 0.5s 10. Reset/start delay time: 1-600s 11. Voltage measurement accuracy: 2% (does not exceed 2% of the total range) 12. Rated insulation voltage: 400V 13. Output contact: 1NO 14. Electrical life: 100000 15. Mechanical life: 1000000 16. Protection grade: IP20 17. Pollution degree: 3 18. Operating temperature: -50-55°C 19. Humidity: 50% at 40°C (without condensation) 20. Storage temperature: -30-70°C Size: 8.5 x 3.5 x 6.5cm Material: PC Color: White Package Content: 1 x Voltage Protector Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.