Heavy Duty MMA / HF TIG Welders


Weldman ‘T’ series inverter power sources are built-in high frequency start TIG and MMA welders capable of delivering constant current (CC) DC power. This is achieved using energy efficient IGBT inverter technology. These machines render smooth and stable arc for Stick / MMA welding with various types of electrodes. In TIG mode, various TIG features are available. The machines are designed and built with careful layout of power components and cooling arrangement. Hence, heavy duty welding at higher current is achieved.


  • Stick welding   >   Lift start TIG welding   >   HF start TIG welding   >   Pulse TIG welding (with optional modification kit and pulse TIG unit)


  • Light weight, compact and yet reliable.
  • Designed and built to operate under harshest environment and meets the requirement of quality welding in shipyards, pipelines, construction, petro-chemical plants, oil refinery, offshore works and workshop.
  • Generator friendly (low kVA requirement).
  • Ease of maintenance.
  • Welder friendly controls.
  • Digital display for easy current setting.
  • Step-less current control.
  • HF / LIFT / MMA selector switch for process selection.
  • 2S / 4S / Fast Tack selector switch for Trigger hold and Quick tacking.
  • Gas pre flow (for gas purging) and post flow (for cooling) time adjustment.
  • Current up-slope (for soft start) and down-slope (for crater filling) time adjustment.
  • Arc force adjustment to minimize the electrode sticking to the weld puddle (MMA mode).
  • Built-in hot start for additional current during arc striking (can be adjusted by preset potentiometer in PCB) (MMA mode).
  • HF auto cut-off for protection against accidental triggering.
  • Tungsten tip saving circuit (when tungsten is shorted to work piece, only 10A current flows).
  • MCB for fault protection and fuse for Control circuit protection.

Current limit, Under voltage and Overload protection.

OPTIONAL ITEMS (Require necessary modification in power source)

Remote Current / Volt control unit             WER101

Remote Pulse TIG unit                                WERP100

Input Supply Voltage 415V + 10%, 3-Ph, 50/60Hz
Rated Input 12.2kVA 18.0kVA 12.95kVA
Idling Input Current 0.25A (Max.)
Maximum OCV (CC) 82V DC 75V DC
Current Range (TIG) 10A – 300A 10A – 400A 10A – 400A
Current Range (MMA) 10A – 300A 10A – 400A 10A – 300A
Rated Duty cycle @ 70% (MMA) 300A / 32V 400A / 36V 300A / 32V
Rated Duty cycle @ 70% (TIG) 400A / 26V
Rated Duty cycle @ 100% (TIG) 300A / 22V 400A / 26V 350A / 24V
Gas Pre Flow Time 0.1sec – 3sec 0.1sec – 10sec
Gas Post Flow Time 5sec – 60sec 3sec – 30sec
Current Up Slope Time 0.1sec – 15sec 0.1sec – 5sec
Current Down Slope Time 0.5sec – 15sec 0.5sec – 15sec
Dimension (L x W x H) 500 x 260 x 500 mm 490 x 260 x 450 mm
Weight 51.2kg 31kg

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