Heavy Duty Multi-Process Welders


Weldman “UNI” series inverter power sources are multi-process welders capable of delivering either constant current (CC) or constant voltage (CV) 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 and also for GMAW / MIG welding with solid and flux cored wires of various sizes and types. Weldman WE4R2 is the suitable wire feeder to work with “UNI” series power sources. The machines are designed and built with careful layout of power components and cooling arrangement. Hence, heavy duty welding at higher current is achieved.


MMA / TIG Mode   >   Stick welding   >   Gouging   >   Scratch start TIG welding   >   HF start TIG welding (with HF TIG control unit)

MIG / CV Mode   >   MIG / MAG / CO2 welding (Solid wire)   >   FCAW welding (Flux cored wire)


  • 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 and monitoring of voltage.
  • Step-less current / voltage control.
  • Arc force adjustment to minimize the electrode sticking to the weld puddle.
  • Built-in hot start for additional current during arc striking (can be adjusted by preset potentiometer in PCB).
  • Adjustable electronic inductance control for smooth and spatter less welding.
  • Wire inching and gas purging facility in wire feeder.
  • Selection of torch switch function either 2-stroke (manual) or 4-stroke (trigger hold) in wire feeder.
  • Suitable for voltage sensing (OCV driven) wire feeder.
  • MCB for fault protection.
  • Under voltage and Overload protection.
  • Current limit.
  • Control circuit protection by fuse.



    Remote Current / Volt control unit          WER101

    HF TIG control unit                                          WERT301

    Wire Feeder                                                       WE4R2

Input Supply Voltage 415V + 10%, 3-Ph, 50/60Hz
Rated Input 12.2kVA 18.0kVA 25.1kVA
Idling Input Current 0.25A (Max.)
Maximum OCV (CC) 60V DC
Current Range (CC) 10A – 300A 10A – 400A 10A – 500A
OCV Range (CV) 0V – 35V 0V – 41V 0V – 48V
Rated Duty cycle @ 70% 300A / 32V 400A / 36V 500A / 40V
Rated Duty cycle @ 100% 250A / 30V 330A / 33.2V 420A / 36.8V
Dimension (L x W x H) 490 x 260 x 380 mm 490 x 270 x 440 mm
Weight 39kg 44.2kg

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