FEATURES OF MMA Welding Instrument ARC-250: 1. MOSFET inverter and precision constant current feedback control and technology, soft switch; 2. Wide working voltage range, strong adaptability to electricity power grid, high ability of interference resistance, stable welding current and steady arc; 3. Intensive arc, high welding speed, excellent welding performance, deep welding pool, less spatter, continuous current regulation, safety and reliable for operation; 4. Compact structure, portable, energy saving, easy for maintenance; 5. Applicable to various acid and basic welding electrodes; 6. Suitable for stainless steel, copper, cast iron, carbon steel, alloy metal, etc. ; 7. Complete accessories: welding torch, welding cable, earth clamp, welding holder. PARAMETERS OF MMA Welding Instrument ARC-250: Model Spec. ARC-250 Power supply voltage 3-Ph AC 380�10%V/ 50~60Hz Power supply capacity 9.5 kVA No-load voltage 56 V Out put current range 10-250 A Power output voltage 30.0 V No-load loss(W) 60 Duty cycle 60% Cosφ (η) 0.93 Protection IP 21 S Insulation grade F Diameter of rod 1.6-5.0 mm Net Weight 18.5 kg Dimension (mm) 500*210*365 * BUY WITH CONFIDENCE. * QUALITY MACHINES MANUFACTURED BY RONGYI. * FULL SERVICE AND PARTS BACK UP. * 12 MONTHS WARRANTY. The data in the above table is only for reference. Please subject to the name plate on the device.