MMA Standard Dc Transformer voltage / 3x400 Power Range/ 50-550 A Duty cycle / 35%: 550 A / 60%: 420 A / 100%: 250 A Open circuit voltage / 80 V Frequency / 50 Hz - 60 Hz Mains fuses / 25 A Max. connected power / 16.9 KvA Recommended generator rating / 28.5 KvA Cos / 0.9 Protection classification / IP 21 s Insulation class / H Dinse / 50 mm2 Weight / 132Kg Dimensions (mm) (WxLxH) / 440X850X760 mm Electrodes diam / 1.5-8.0