Residential Usage 230VAC 80A Digital LCD Measuring kWh Meter Wattmeter Over and Under Voltage Protector Limit Current Protector The automatic recovery over voltage and under voltage protective device complies with modular design standards. the circuit boards of products adopt good quality electronic components with reliable performance. When the power situation is unstable. It's protection function will be automatically activated. once the voltage exceeds the limited range of products, it will automatically cut off so as to protect the safely of electrical equipment and persons. The device will re-supply when the power returns to normal. We have the manual in English,Ruian and Portuguese,tell us your e-mail addre then we will send it to you.Functions:1.Over-voltage protection 221V~300V adjustable (default:280V)2.Under-voltage protection 219V~150V adjustable (default:160V)3.Over current protection 1A~80A adjustable (default:80A)4.Automatic recovery 2S~512S adjustable (default:60S)5.Volt-meter (The first value displays Voltage)6.Amp-meter (The second value displays Current)7.KWH meter (The third and fourth values display the power consumption)(The maximum measurement is 99,999kwh.The third value is the first two digits of the kwh.The fourth number is the last three digits of the kwh.)Product Parameters:1.Model number:SVP-915A2.Power supply:230VAC 50/60Hz 3.Max.Loading power:80A4.Overvoltage protection value range:221V~290(default:275V)5.Undervoltage protection value range:219V--150V(default:170V)6.Overcurrent protection value range:1A~80A(default:80A)7.Power consumption : <2W 8.Electric machinery life : 4,000 times9.Dimensions : 65*35*85mm10.Installation:35mm DIN rail