1.Over-voltage protection<br> 2.Under-voltage protection<br> 3.Over-current protection<br> 4.Automatic recovery<br> 5.Voltage display(voltage measurement)<br> 6.Current display (current measurement)<br> 7.Wattmeter kWh Energy Meter Power Consumption<br> 8.Installation:35mm DIN rail<br> Rated supply voltage:AC 220V<br> Operation volatge:AC 80-400V(single phase)<br> Rated frequency:50/60HZ<br> Kilowatt-hour protection value:1-9999/OFF<br> Rated current:40/63A(subject to product label)<br> Reset /start delay time:1-600s<br> Voltage measurement accuracy:2%(not exceeding 2% of the overall range)<br> Rated insulation voltage:400V<br> Output contact:1NO<br> Electrical life:100000<br> Mechanical life:1000000<br> Protection degree:IP20<br> Pollution degree:3<br> Operating temperature:-50℃-55℃<br> Humidity:≤50% at 40℃ (without condensation)<br> Storage temperature:-30℃-70℃<br> Colour:As Shown<br> Material:plastic<br> Package Contents:<br> 1 x Adjust Voltage Relay<br> Only the above package content, other products are not included.<br> Note: Light reflection 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.