MIG (Metal-arc Inert Gas) or MAG (Metal Active Gas-arc) (their only difference is the gas used for the protection of weld pool), is a welding process that developed during the 50s that has become more and more important in the recent years. The progress of technological innovation and cost reduction of electronic products have allowed this development: as result semiautomatic welding machines have been developed at affordable prices. This ensure high productivity, if compared to machines used in other processes. Heavy Duty MIG WELDING MACHINE W/O ACC 230-400V/3PH 500A. @60%(430A.)-@100%(320A.) TM500W DV