The PROTIG – 400PIII TIG/GTAW Welder (400 V, 400 A, Water-Cooled) is an industrial-grade multifunctional welding machine designed for demanding fabrication environments. Mounted on a trolley with integrated water cooling, it combines portability with robust performance.
Equipped with advanced IGBT inverter technology, the PROTIG 400PIII offers DC TIG, Pulsed TIG, Lift TIG, and MMA welding modes. Pulse TIG minimizes heat input, improves bead appearance, and is ideal for thin materials. MMA mode supports electrodes with acidic, basic, and rutile coatings, with adjustable Hot Start and Arc Force.
The machine features a digital ammeter/voltmeter, LED indicators for power, overload, and voltage protection, and a fully functional control panel with adjustable parameters including gas pre-flow/post-flow, ignition/base/peak current, pulse frequency, and balance.
Compact yet powerful, the PROTIG 400PIII delivers up to 400 A TIG output and 350 A MMA output. Its patented design, fan cooling system, and IP21S protection class ensure durability and reliability.
TECHNICAL DETAILS:
| Specification | Details |
| Model | PROTIG 400PIII |
| Input Voltage | 400 V |
| Max Input Current | 26 A |
| Rated Input Capacity | 18.1 kVA |
| Open Circuit Voltage | 73 V |
| Welding Current Range | TIG: 20–400 A / MMA: 25–350 A |
| Rated Output | TIG: 20–400 A / MMA: 25–350 A |
| Pulse Frequency | 0.5–250 Hz |
| Pulse Balance | 0–100% |
| Gas Pre-flow | 0.3–10 sec |
| Gas Post-flow | 0.5–25 sec |
| Current Rise/Fall Time | 0–10 sec each |
| Cooling | Fan + water cooling |
| Protection Class | IP21S |
| Weight | 38 kg |
| Dimensions (L×W×H) | 1080 × 470 × 1265 mm |
| Features | Pulse TIG, DC TIG, Lift TIG, MMA, 2T/4T modes, digital display, voltage & thermal protection, quick connectors, 5-pin TIG pedal connector |
| Applications | Carbon steels, low-alloy steels, stainless steels, aluminum alloys; industrial fabrication, repair, and maintenance |
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