... current, steady and intensive arc,high efficiency, convenient to carry;welding machine IGBT DC MMA Welding Machine(ZX7-400)1. Advanced IGBT inverter ... , suitable for TIG and MMA of various metals;4. Stable arc, high welder speed, little spatter, suitable for filler wire welding, excellent ... %60%60%60%Output current range 20-315 A20-400 A20-500 A60-630 ACosφ (η)0.950.950.950.95Protection class IP 21SIP ...