Feature:Technical Parameter BX1-400 BX1-500 BX1-630 Main Voltage (AC)V 230/380 230/380 230/380 Frequency Hz 50 50 50 Input Capacity KVA 31 38 51 No Load Voltage V 76 75 78 Welding Current A 80-400 100-500 125-630 Duty Cycle % 35 35 35 Min Electrode (Φ)mm 2.5 3.2 3.2 Max Electrode (Φ)mm 7 8 10 Insulation Class IP F F F Protection Degree IP21S IP21S IP21S Dimension mm 660X490X850 710X530X850 710X530X850 Weight Kg 97 112 140