Lincoln Flextec 350X PowerConnect Multi Process Welder (Tweco) - K4273-1

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The Flextec 350X PowerConnect is capable of supporting multiple welding processes like the other 350X models. It is capable of Stick, TIG, pulsed and CV MIG as well as arc gouging. The PowerConect model also supports multiple input voltages from 200V up to 600V, single or 3-phase. This gives the power source the ultimate in versitiltiy allowing easy transport from one jobsite to another without ever needing to worry about what input voltage might be available. In addition, PowerConnect can see the incoming voltage and adjust itself as needed. There is no additional need for manually reconnecting for the available input voltage. As with the other Flextecs, CrossLinc Technology is included as a standard feature and can be used with all Lincoln CrossLinc accessories.


  • PowerConnect allows for Automatic connecting to any incoming voltage 200-575VAC, single or three-phase, 50 or 60Hz.
  • Built in pulse programs for carbon steel stainless steel, metal core and aluminum. Requires use of a Power Feed ArcLink wire feeder.
  • Ultimate process flexibility. Supports MIG, TIG, Stick, FluxCored and Carbon Gouging
  • Ultimate feeder flexibility. Supports CrossLinc wire feeders, 14-pin analog wire feeders, 5-pin ArcLink digital wire feeders
  • Proven Reliability. Based on the same proven platform as the previous Flextec machines and lab and field tested to perform in extreme environments.
  • Supports 14-pin and 5-pin (ArcLink) wire feeders as well as CrossLinc and Across-the-Arc

What's Included

  • 8.5ft 4 conductor/ 8 AWG input power cable
  • Flextec® 350X Empty 4-Pack Rack | K3400-2


Product Weights & Dimensions

Dimensions (H x W x D) 17 in x 13 in x 24 in (432 mm x 330 mm x 609 mm)
Net Weight 84 lbs (38.1 kg)


Machines Processes Stick (SMAW)
Gouging (CAC-A)
Flux-Cored (FCAW)
Pulsed MIG (GMAW-P)
Max Rating 425A
Output Range by Mode 5-425
Machines Communication Technology analog
Wire Feeder Supply Voltage 40VDC
Amphenol Pins (type of connector) 5
Work Lead Connector Type Tweco

Basic Specification

Input Voltage 200-600/1/3/50/60
Input Current 3 Phase: 350A/34V/60%, 208-220/220-230/380-415/460/575, 45/40/23/19/15
1 Phase: 350A/34V/60%, 380-415/460/575, 39/32/26
1 Phase: 300A/32V/60%, 200-208/220-230, 62/56
Input Hertz 50/60
Input Power 3 Phase, 200-208/220-230/380-415/460/575 - 50/60 Hz
1 Phase, 380-415/460/575 - 50/60 Hz
1 Phase, 200-208/220-230 - 50/60 Hz
Input Phase 1/3
Output Range 3 Phase 200-600V, 5-425A, Max OCV: 80V DC
1 Phase 380-575V, 5-425A, Max OCV: 80V DC
1 Phase 200-230V: 5-350A Max OCV 67V DC
Rated Output 3 Phase 200-600V:
1 Phase 380-575V:
1 Phase 200-230V:


Typical Application Cross Country Pipeline
Construction & Field Erection
General Fabrication
Heavy Equipment
Heavy Fabrication
Structural Fabrication


Warranty 3 Years


CAD Files

The VRTEX® Mobile simulates the GMAW (short arc, spray, pulse and STT® metal transfers) and FCAW (Self-shielded and Gas-shielded) processes in the standard system.  SMAW (E6010, E6013, and E7018) is an optional hardware and software kit.

SMAW (Optional on VRTEX® Mobile)

  • E6010 (Fleetweld®® 5P+)
  • E7018 (Excalibur® 7018)
  • E6013 (Fleetweld® 37)


  • Short Arc (.035” SuperArc® L-56)
  • Axial Spray (.045” SuperArc® L-56)
  • Pulse (.045” SuperArc® L-56)
  • STT® Surface Tension Transfer® (.045” SuperArc® L-56)


  • Gas-shielded .045 “ (UltraCore® 71A85)
  • Self-Shielded 5/64” (Innershield® NR-232)

The VRTEX® Mobile comes with 3 welding coupons (Flat Plate, Tee Joint, Groove Joint) that can be used in limited positions.

  • Plate: Flat, Horizontal, Vertical and Overhead
  • Pipe: 2G, 5G and 6G
  • The VRTEX® Mobile supports limited positions:
  • Plate: Flat, Horizontal and Vertical
  • Push and drag GMAW techniques
  • Stringer beads
  • Weave techniques – straight, triangle and box weave

Recently released! The VRTEX® has now expanded language support for Portuguese (Brazilian) and Russian.

Input current: 4A @ 115, 2A @ 230

  • The VRTEX® system requires a space of 8’ L x 8’ D x 8’ H (2.4 m x 2.4 m x 2.4 m).
  • When operating multiple units in one location, alternate between standard and alternate frequency systems (unique part numbers are identified).
  • The VRTEX® system is not designed for operation in harsh environments. Recommendations are listed in the instruction manual.
  • Avoid magnetic fields, conductive and high frequency objects and processes.
  • An uninterruptible power supply (UPS) may be required for protection of the system from power irregularities and/or disruptions
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