Welding manner: Manual Arc Welding, carbon arc air gouging, cellulose coated electrode. Applicable Materials: Acid electrode, basic electrode, stainless steel electrode,et. Slow-carbon steel, medium-carbon steel and alloy steel. Control System: Adopted pulse width modulator(PWM)with closed-loop control systerm ensure the machine working stability. Advanced technology:1) IGBT soft switching make it high reliable. 2)Striking and thrust current adjustable, easy arc starting, little spatter. 3)Good dynamic characteristic, good arc stability. 4)Small cubage, light weight, high efficiency and energy-saving, effect. ModelZX7-315ZX7-400ZX7-500Input Voltage(A)3-380V±10%3-380V±10%3-380V±10%Input Capacity(KVA)172129No load Voltage(V)787878Welding Current(A)315400500Current Range(A)20-31520-40030-500Rated Duty Cycle(%)606060Efficiency(%)888888Insulated GradeFFFDiameter of the wire(MM)¢1.6-5¢1.6-5¢1.6-6