Rugged and Versatile Arc 630i is heavy duty IGBT based inverter power source suitable for MMA welding, Air Carbon Arc Gouging (A-CAG), Scratch TIG and designed for 24x7 usage. ? 1. Stable performance with long leads in MMA with E6013 and E7018 electrodes ? 2. Wide operating window: 20 to 630A ? 3.Wide mains voltage tolerance: 400V -15% ... +20% ? 4. User-friendly controls: adjustable arc force & hot start in MMA mode and process selection switch for MMA / Scratch TIG ? 5. In-built protections – mains over/under-voltage & overheating