... 100KHz, conversion rate of 85%, no-load loss, using non-adjustable, easy to use, easy to carry, reliable and economical and ... , 200B with thrust adjustable function; Improve the protection system: over-voltage, overheating, over-current automatic protection to ensure welding safety........ ITEMzx7-140zx7 ... *310460*255*355G/N Weight(KG)5.4/4.56/5.49.8/8.5 220V dc arc welding machine MMA160I(IGBT)