Functions: 1.Over-voltage protection2.Under-voltage protection3.Over-current protection4.Automatic 5.Voltage display(voltage measurement). Current display (current measurement).Installation:35mm DIN railTechnical data:1.Rated supply voltage:AC 220V2.Operation volatge:AC 80-400V(single phase)3.Rated frequency:50/60HZ4.Electric current ( A) setting range:1-40A5.Overvoltage ( U)setting range:230-300V6.Undervoltage ( Less than U) setting range:210-140V7.Rated current:40A8. U and Less than U trip delay time:0.1-30s9.Reset / delay time:1-500s10.Voltage measurement accuracy:2%(not exceeding 2% of the overall range)11.Rated insulation voltage:400V12.Max.Loading power: 1-40A Adjustable(default:40A)13.Over-voltage protection value range:230V~300~OFF(default:270V)14.Over-voltage voltage range:225V--295V(default:265V)15.Over-voltage protection action time:0.1s-30s(default value:1s)16.Over-voltage delay time:1s-500s(default:30s)17.Under-voltage protection value range:210V--140V(default:170V)18.Under-voltage voltage range:215V--145V(default:175V)19.Under-voltage protection action time:0.1s-30s(default:1s)20.Under-voltage delay time:1s-500s(default:30s)21.Over-current delay time:1-500s(default:30s)Material: PCcolour: whitePackage Contents:1 x Voltage ProtectorOnly the above package content, other are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real . The measurement allowed is +/- 1-3cm.