The Shakti MMA-400CI is a three-phase 400 A IGBT inverter MMA welding machine for heavy-duty fabrication and structural welding — authorised Shakti dealer Multi Trade Combines stocks it at Guwahati, price on request.
The Shakti MMA-400CI is a three-phase IGBT inverter MMA welding machine rated at 400 amperes — the professional heavy end of the stick welding range. Three-phase input gives it balanced current draw across all three phases, higher duty cycle, lower heat dissipation per phase, and the ability to sustain high-amperage welding for extended periods without thermal shutdown. For fabrication workshops with three-phase supply that run heavy structural welding as their core activity, the 400A class is the appropriate starting point.
Compared to older three-phase transformer welders of the same amperage, the MMA-400CI's IGBT inverter technology makes it significantly smaller, lighter and more energy-efficient. Transformer welders at 400A can weigh 100–150 kg and require fixed floor installation; the MMA-400CI is portable enough to reposition within the workshop. The inverter arc start and arc stability also give better welding quality with modern low-hydrogen electrodes.
Multi Trade Combines is an authorised Shakti dealer in Guwahati. We stock the MMA-400CI and can advise on the correct machine for your workshop's power supply and production requirements.
| Brand | Shakti |
|---|---|
| Category | Welding Machines |
| Key specs | 3-PH · 400 A inverter |
| Technology | IGBT inverter — three-phase input, stable arc at high amperage |
| Input voltage | Three-phase 415 V — industrial supply |
| Electrode range | 2.5 mm to 6.0 mm diameter |
| Duty cycle | High duty cycle at rated current — suited for continuous production welding |
| Availability | In stock — price on request |
A heavy fabrication welding station around the MMA-400CI includes:
Yes — the MMA-400CI is a three-phase input machine requiring a 415 V three-phase supply (three live conductors plus neutral, typical of industrial and commercial electrical connections). It cannot run on a domestic single-phase 230 V supply. Before purchasing, confirm with your workshop's electrical contractor or the state electricity board (APDCL in Assam) that you have a three-phase connection with sufficient load sanctioned — a 400A inverter welder at full output draws approximately 15–18 kVA from the three-phase supply. An industrial workshop MCB/MCCB of 40A three-phase is the typical minimum.
The MMA-400CI handles electrodes from 2.5 mm up to 6.0 mm diameter — covering the full range of general fabrication and structural welding rods. At 400A output with a 6.0 mm E7018 low-hydrogen electrode, it can weld mild steel plate up to 20–25 mm thickness in a multi-pass procedure. Single-pass welding of 12–15 mm plate is routine at near-full amperage. This output level is appropriate for heavy structural fabrication — I-beam welding, bridge sub-structure components, large tank and vessel fabrication, and heavy machinery base frames. It is a production-grade machine suited to high-volume fabrication sheds running full shifts.