Supra MMA 400(D) / 600 (D) transducting controlled MMA welding rectifier is built using advanced,solid State technology, designed to meet stringent demands of high quality radiographic welding. It is suitable for almost all industries, such as Ship-building, Power Plants, Petroleum, Steel Plants, Structural Fabrications, Pressure Vessels and others. • TRANSDUCTOR CONTROLLED DC ARC WELDING RECTIFIER. • HEAVY DUTY, RUGGED FOR SITE CONSTRUCTION WORK. • RELIABLE, HIGH PERFORMANCE WELDER. • OCV – 80 Volts, FOR BETTER ARC INITIATION • FORCED AIR COOLED. • IDEAL FOR ALL TYPE OF EL