Functions: 1. Over-voltage protection, under-voltage protection 2. Over-current protection, automatic reset 3. Voltage display (voltage measurement), current display (current measurement) 4. Wattmeter, kWh energy meter, power consumption monitoring 5. Installation: 35mm DIN rail Product Parameters: 1. Rated supply voltage: AC 220V 2. Operating voltage: AC 80400V (single phase) 3. Rated frequency: 50/60 Hz 4. Electric current (A) setting range: 140A, OFF 5. Overvoltage (U) setting range: 230300V, OFF 6. Undervoltage (Less than U) setting range: 210140V, OFF 7. Kilowatt-hour protection value: 19999, OFF 8. Rated current: 40A 9. U and Less than U trip delay time: 0.5s 10. Reset/delay time: 1600s 11. Voltage measurement accuracy: 2% (not exceeding 2% of the overall range) 12. Rated insulation voltage: 400V 13. Output contact: 1NO 14. Electrical life: 100,000 operations 15. Mechanical life: 1,000,000 operations 16. Protection degree: IP20 17. Pollution degree: 3 18. Operating temperature: -5C to 55C 19. Humidity: 50% at 40C (without condensation) 20. Storage temperature: -30C to 70C Size: 8.5 x 3.5 x 6.5 cm Material: PC Color: White Package Contents: 1 x Voltage Protector Note: Other products are not included. Note: Light reflection and different displays may cause the color of the item to appear slightly different from the real thing. Measurement error allowed is +/- 13 cm.