The SC 350-500-800 are electronic direct current generators, with three-phase 50/60 Hz power transformer and SCR semi-controlled rectifier arc. They may be used for welding with coated electrode (MMA) for acid, basic, stainless steel, aluminium and cellulose applications. They may also be used in TIG welding with scratch-start. They are ideal for use in medium and heavy metal work, depending on the model, and are particularly suitable for use in shipyards. All the magnetic coils are made from top quality copper. The voltage change terminal block inside the machine permits changing the supply voltage. Through the electronic control board, the current is constantly regulated by the potentiometer on the front of the machine or the optional remote control. The distributed current remains stable on the set value even in the event of variations in the supply voltage, and can be changed even with welding in progress. For MMA welding the Hot Start function may be installed to improve striking the coated electrodes. On request they may be fitted with digital volt/ammeter.