Dual LED Display 40A 63A 80A Din Rail Adjustable Over Voltage Current and Under Voltage Protector Surge Protector Relay 220V Functions:1.Over-voltage protection2.Under-voltage protection3.Over-current protection4.Automatic recovery5.Voltage display(voltage measurement)6.Current display (current measurement)7. Voltage calibration: Voltage +-10% adjustable. A138. Restore factory settings: pre the down button for more than 12s9. Fault inquiry: Pre the UP button from more than 12SProduct Parameters:1.Model number:YHVPD1-40/YHVPD1-63/YHVPD1-802.Power supply:230VAC 50/60Hz3.Max.Loading power:1~40A Adjustable(default:40A)1~63A Adjustable(default:63A)4.Over-voltage protection value range:230V~300~OFF(default:270V)Over-voltage recovery voltage range:225V--295V(default:250V)Over-voltage protection action time:1s~60s(default value:1s)Over-voltage recovery delay time:3s~300s(default:30s)5.Under-voltage protection value range:140V--210V --OFF(default:170V)Under-voltage recovery voltage range:145V--215V (default:190V)Under-voltage protection action time:1s~60s(default:1s)Under-voltage recovery delay time:3s~300s(default:30s)6.Over-current adjustment range:1-40A (default:20A) 1-63A (default:40A)Over-current action range:1~60 second (default:1s)Over-current recovery delay time:1s~500s(default:30s)7.Power-on delay time:1s~500s(default:10s)9.Power consumption : <2W10.Electric machinery life : 100,000 times11.Installation:35mm DIN rail