... reliability 3.excellent welding performance 4.High efficiency Arc Welding Power SourceProduct info: PE52-630 is new version DC manual ... all metal structures in container (e.g. boiler) manufacturing, power plant, metallurgy, chemical, aviation/aerospace and vehicle making industries. ... /(20V~45V)~630A/(20V~45V)Duty cycle630A/44V X=100%Power factor (cosΦ)0.7~0.9Efficiency (η) ≥0.85Insulation gradeFCase ...