Product Description This series of welding machine is manufactured with the advanced technology imported from Japan. Lts main circuit is of double reversed star-connected SCR(Silicon Controlled Rectifier)rectifying circuits; Its control circuits adopts high precision control technique. Unified adjustment can also be made when the network voltage and surrounding environment is under variation. This series of welding machine has good welding performances; Its arc is steady and gentle, with little spatter, high reliability. Lt can be fully compared with the inverter type welding machines. This machine also has the slowly wire-feeding function and small ball-removing function, make the arc-striking to be very easy. Connections between the wire feeding machine and the main machine only carried out by one control cable, both safe and convenient. Type KN-250 KN-350 KN-500 KN-630 Input voltage Three phases AC380v 50hz Rated input 11KVA(9KW) 18KVA(16KW) 30KVA(26KW) 42KVA(36KW) Output current 50-250 50-350 50-500 100-630 Output voltage 14-31V 14-36V 14-42V 14-50V Duty cycle 60% Wire diameter ¢ 0.8 ¢1.0 ¢1.0 ¢1.2 ¢1.2 ¢1.6 Cooling method Gas cooling Max. flow of gas 25L /min Overall diameter(mm) 375 × 65 0 × 730 445 × 620 × 790 550 × 680 × 800 Weight ( kg) 85 96 125 150,