... Pressure Vessel, Shipbuilding,Offshore Operation,etc. Suitable for big current welding.2.Applicable Materials: Low/High alloyed steel, Carbon Steel ... soft switch and power factor alignment technique. Ensure stable welding under voltage fluctuation. High power factor, less EMI; ... power factor; 3).Synergic adjusting,matching various full automatic welding machine; 4).Save up to 10 sets of customized ...