The Excellent Enterprises TIG-ARC-400 Three Phase IGBT Inverter Welding Machine is the heavy flagship of the DC TIG range — a 400A dual-process DC TIG + MMA platform for pressure-vessel, pipeline, shipbuilding and structural fabrication where precision, sustained duty and versatility matter. Running on 380V three-phase, it welds steel, stainless, low-alloy steel and cast iron (for aluminium TIG, see our AC/DC range).
Product Overview
IGBT inverter technology delivers stable high-current output, superior thermal efficiency and durability under prolonged load — the right choice over MOSFET for continuous heavy work. DC Lift-TIG ignition strikes without high-frequency emissions (safe near CNC/instrumentation); MMA mode handles heavy fabrication and repair with electrodes up to 6.0mm.
Key Features
- 20–400A DC TIG + MMA output.
- IGBT architecture for sustained high-current duty.
- DC TIG for steel/stainless/low-alloy/cast iron (not aluminium).
- MMA to 6.0mm electrodes.
- Lift-TIG start — no HF interference.
- Phase-loss protection + overvoltage/overcurrent/overheat.
Benefits
Heavy-duty IGBT output sustains high-amperage TIG and stick on thick sections; clean DC TIG for precision joints; phase-loss protection guards three-phase reliability; one machine covers precision and heavy fabrication.
Technical Specifications
| Specification | Details |
|---|---|
| Model | TIG-ARC-400 |
| Technology | IGBT Inverter |
| Processes | DC TIG + MMA |
| Arc Start | Lift TIG |
| Input Voltage | AC 380V ±15% |
| Phase | Three Phase |
| Output Current | 20A – 400A |
| No-Load Voltage | 70–80V |
| Duty Cycle | 60% (DATA REQUIRED: confirm rated amperage) |
| Efficiency | 85%+ |
| Electrode (MMA) | Up to 6.0mm |
| Suitable Materials | Carbon / Stainless / Low-Alloy / Cast Iron (not aluminium — DC) |
| Protection | Overvoltage / Overcurrent / Overheat / Phase Loss / Anti-Stick |
Materials & Construction
Heavy industrial IGBT enclosure with control panel, three-phase power section and phase-loss protection. (DATA REQUIRED: weight, dimensions, IP, torch.)
Applications
Pressure-vessel fabrication; structural steel manufacturing; pipeline welding & repair; shipbuilding & dockyard; heavy engineering; bridge construction; power-plant maintenance; railway fabrication; EPC projects; defence manufacturing; OEM heavy-equipment production.
Industries Served
Pressure-vessel/boiler · pipeline · shipbuilding · heavy structural/bridge · power & infrastructure · defence/railway · heavy-equipment OEM.
Buying Considerations
- Aluminium? No — DC TIG (steel/stainless/low-alloy/cast iron); choose AC/DC for aluminium.
- Process choice (vs MIG-400 / ARC-400): TIG-400 for DC TIG + stick; MIG-400 for wire-fed MIG/MAG production; ARC-400 for dedicated stick — pick by process, not just amperage.
- vs TIG-ARC-250: step up for heavy continuous high-amperage TIG/stick.
- What’s included: confirm TIG torch (+length) + argon regulator (DATA REQUIRED).
Why Choose Excellent Enterprises
ISO 9001:2015-certified, ISI-compliant supplier, 500+ clients since 1997 (29+ years). Genuine, warranty-backed machines, bulk pricing, PAN-India delivery, GST invoicing, OEM/export support, 30-minute quote response — plus tungsten, argon regulators and PPE.
Maintenance
Grind tungsten correctly; check gas for leaks; inspect collet/cap/cup; clear vents (heavier heat at 400A); verify three-phase connections; store dry.
Safety Considerations
Auto-darkening helmet, FR clothing, TIG gloves; fume extraction; secure argon cylinder; three-phase connection by a qualified electrician; isolate before service. Follow IEC 60974-1 and site hot-work procedures.
Frequently Asked Questions
What is the TIG-ARC-400 used for? Heavy DC TIG + MMA fabrication — pressure vessels, pipelines, shipbuilding, structural steel — on steel/stainless/low-alloy/cast iron at 380V. Does it weld aluminium? No — DC TIG (steel & stainless). Use an AC/DC machine for aluminium. Why IGBT over MOSFET here? IGBT handles higher voltage and sustained heavy current more efficiently, with better thermal stability and durability for industrial duty. TIG-400, MIG-400 or ARC-400? Choose by process: TIG (DC TIG + stick), MIG (wire-fed MIG/MAG), ARC (dedicated stick). What electrode size? MMA up to 6.0mm. Is a torch/argon regulator included? Confirm at quote (DATA REQUIRED).
Conclusion & RFQ CTA
The TIG-ARC-400 is a heavy 400A three-phase DC TIG + MMA IGBT welder for steel and stainless — from an ISO 9001:2015 supplier with 29+ years’ experience. Request a quote for price, torch/argon-regulator/tungsten and PAN-India delivery.
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