NEW GENERATION IGBT INVERTER WELDING POWER SOURCE SALIENT FEATURES SUPRA Inverter Arc Welding Machine is suitable for DC stick welding with ??Withstands wide range of voltage fluctuations,415 AC +/- 10%. ? ? ? ? ? SUITABLE FOR MOST DEMANDING INDIAN CONDITIONS various types of welding electrodes. It is suitable for almost all industries; such as Ship-building, pressure Vessels, Steels, Petroleum and Power plants.