WS series welding machine Model No:ws-250,ws315,ws400 Voltage: 3 Phase AC380V±15% Frequency(Hz): 50/60 Rated ... MMA/13-TIG,27.6-MMA/20-TIG No-load voltage(V): 70,73,73 Output Current(A): 20-250 ... ,20-315,20-400 Rated Output Voltage(V): 30-MMA/20-TIG,32.6-MMA/22. ... utilization, low consumption without load, save energy. 5. Wide work voltage range, strong ability in adapting power grid. 6. It can ...