Inverter Welding Machine Model:wdo60112020. Inverter Welding machines Welding Machine 2020: Voltage: 220-240V AC Frequency: 50-60Hz Max input power: 7.2KVA No load voltage VRD: 45v Output range: 20-200A DC IGBT technology full bridge primary technology VRD Anti-shock function Avoid electrode adhesion technology Continuous welding