BX1-B Series Portable AC ARC welding machine 1). Moving coil type transformer: Suitable for 380V/220V AC supply; 2). TIG seCompact, light, easy to carry, and suitable for mobile, go out and small-scale construct and busywork. 3). Provided with automatic temperature protector and air-cooling unit, and highly effective and safe; 4). Suitable for welding low carbon steel, low alloy steel, etc