The automatic over-voltage and under-voltage protector is suitable for three-phase AC 380V, 50/60Hz, rated working current 63A or less loads.main feature is when the circuit has over-voltage or under-voltage problems, the product can cut off the power supply instantaneously to the electrical equipment from being damaged, besides,the protector can automatically turn on the power supply when the circuit voltage returns to the normal.Color: gray whiteMaterial: PC plasticFunctions:1.Over-voltage protection2.Under-voltage protection3.Automatic4.Voltage display(voltage measurement)5.Three-phase unbalance protection6.Phase sequence protection (reverse phase protection)7. break protection8.Phase failure protectionProduct Parameters:1.Model number : TOVPD32.Power supply:3 x 230V / 400V AC 50/60Hz3.Max.Loading power:63A4.Over-voltage protection value range:230V~300 Adjustable (default:270V)Over-voltage 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 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 power-on:1~500 second (default:10s)8. delay time : 1~500s(default:30s)9.Installation:35mm DIN railPackage Contents:1 x 3 Phase Voltage RelayOnly the above package content, other are not included.Note: Light 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.