The automatic over-voltage and under-voltage protector is suitable for three-phase AC 380V, 50/60Hz, rated working current 63A or less loads.Its main feature is when the circuit has over-voltage or under-voltage problems, the product can cut off the supply instantaneously to protect the electrical equipment from being damaged, besides,the protector can automatically turn on the supply when the circuit voltage returns to the normal.Color: gray whiteMaterial: PC plasticFunctions:1.Over-voltage protection2.Under-voltage protection3.Automatic recovery4.Voltage display(voltage measurement)5.Three-phase ampere unbalance protection6.Phase sequence protection (reverse phase protection)7.Zero line break protection8.Phase failure protectionProduct Parameters:1.Model number : TOVPD32. supply:3 x 230V / 400V AC 50/60Hz3.Max.Loading :63A4.Over-voltage protection value range:230V~300 Adjustable (default:270V)Over-voltage recovery value range:225V~295V (default 265V)Over-voltage protection action time:0.1~30 second (default 1)5.Under-voltage protection value range:140V~210V Adjustable (default:170V)Under-voltage recovery value range:145V~215V (default 175V)Under-voltage protection action time:0.1~30 second (default 1S)6.3 phases volt unbalance protection value:5-95V adjustabe OFF7.Delay time after -on:1~500 second (default:10s)8.Recovery delay time : 1~500s(default:30s)9.Installation:35mm DIN railPackage Contents:1 x 3 Phase Voltage RelayOnly the above package content, other products are not included.Note: Light 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.