Functions: 1. Over-voltage protection 2. Under-voltage protection 3. Automatic 4. Voltage display(voltage measurement) 5. Installation:35mm DIN rail Technical data: 1.Rated voltage: 220V/230V/AC 2.Operation volatge:AC 80-400V(single phase) 3.Rated frequency:50/60HZ 4.Overvoltage setting range:230-300V 5.Undervoltage setting range:210-140V 6.Rated current:63A 7.Overvoltage and Undervoltage trip delay time:0.5s 8.Reset / delay time:1-600s 9.Voltage measurement accuracy:3%(not exceeding 3% of the overall range) 10.Rated insulation voltage:400V 11.Output contact:1NO 12.Electrical life:100000 13.Mechanical life:1000000 14.Protection degree:IP20 15.Pollution degree:3 16.Operating temperature:-50-55 17.Humidity:50% at 40 (without condensation) 18.Storage temperature:-30-70 type: voltage protector color:White Material:PC size:90 x 65 x 53mm Package Contents: 1 x over voltage protector Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.