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Product Product Input Rated Output Input Current@ Output H x W x D Weight
Name Number Power Current/Voltage/Duty Cycle Rated Output Range inches (mm) lbs. (kg)
Invertec K1525-1 208/230/460/3/60 225A / 29V / 60% 32/30/16A Peak Current: 23.2 x 13.2 x 24.4 117
STT II 200A / 28V / 100% 0-450A (589 x 336 x 620) (53)
K1526-1 200/220/380/415/ Max. OCV: 85V 33/30/18/17/16A Background
International 440/3/50/60 Current:
0-125A
K1526-2 200/208/380/400/ 36/34/20/19/18A
International 415/3/50/60
K1527-1 200/220/380/415/ 33/30/18/17/16A
CE-Approved 440/3/50/60
K1527-2 200/208/380/ 36/34/20/19/18A
CE-Approved 400/415/3/50/60
Description
Output Input
GMAW-STT
Invertec
®
STT
®
II
Featuring the Surface Tension Transfer
®
(STT) Process
Control Heat Input, Spatter and Fume
The revolutionary STT II power source combines high frequency inverter technology with
advanced Waveform Control Technology™ to provide a better welding solution than
traditional short arc MIG. Unlike CV MIG machines, the STT machine has no voltage control
knob. STT uses current controls to adjust the heat independent of the wire feed speed, so
changes in electrode extension do not affect heat. Low heat input welds can be produced
without overheating or burning through, and distortion is minimized. Spatter and fumes are
reduced because the electrode is not overheated — even when welding with larger
diameter wires and 100% CO
2
shielding gas.
Publication E4.52 3/05
www.lincolnelectric.com
Processes
Advantage Lincoln
Recommended General Options
Order
TECHNICAL SPECIFICATIONS
• Controlled penetration and outstanding heat input control — Ideal
for welding joints with open root, gaps, or on thin material with no
burnthrough.
• Reduced spatter and fumes — Current is controlled to achieve
optimal metal transfer.
• Reduced welding costs — Ability to use 100% CO
2
shielding gas
with larger diameter wires.
• Various shielding gases — STT may be used with various gas blends
of Argon including Helium.
• Good bead control and faster travel speeds — Can replace TIG
(GTAW) in many applications without sacrificing appearance.
• Background and Tailout Current accurately control fine and coarse
heat input for reduced distortion and burnthrough as well as proper
penetration.
• Adjustable Hot Start controls the heat at the start of the weld.
• Manufactured under a quality system certified to ISO 9001
requirements and ISO 14001 environmental standards.
• Three-year Lincoln warranty on parts and labor.
Recommended Wire Feeder Options
MIG WELDERS
STT
DC
3
PHASE
60
Hz
50
Hz
STT-10 Wire Feeder, LN-742 Wire Feeder, LN-15 Control Cable Model,
Magnum Gun and Cable Assembly, Magnum Connector Kit
Power Source Remote Output Control, Inverter and Wire Feeder Cart, Dual
Cylinder Kit, STT II Sense Lead Kit, Coaxial Cable, Twist-Mate Cable Plug,
Twist-Mate Cable Receptacle, Twist-Mate to Lug Adapter
Base Unit Includes
Twist-Mate® Cable Plugs (Qty. 2), STT II Sense Lead Kit, 25 ft. (7.6m)
K1525-1 STT II 208/230/460/3/60
K1526-1 STT II International 200/220/380/415/440/3/50/60
K1526-2 STT II International 200/208/380/400/415/3/50/60
K1527-1 STT II CE-Approved 200/220/380/415/440/3/50/60
K1527-2 STT II CE-Approved 200/208/380/400/415/3/50/60