MULTI-PROCESS WELDERS
®
Invertec V350-PRO
Output
CC
CV
Designed Smart. Built Tough.
The Invertec® V350-PRO is a versatile, multi-purpose, multi-process
power source that’s lightweight and portable. Available in Construction,
Factory, Factory (Tweco®), and Advanced Process models, the
V350-PRO is capable of doing virtually any job, whether in the shop or
on the construction site. The V350-PRO is capable of stick, DC TIG,
MIG, Pulsed MIG(1), flux-cored and arc gouging, making it the
most versatile inverter power source in its class. And it’s built
tough to handle the rigors of harsh environments.
DC
Input
1
PHASE
3
50
60
Hz
Processes
Stick, DC TIG, MIG, Pulsed(1), Flux-Cored, Gouging
Note: Plugs not included with Tweco® model.
Advantage Lincoln
• Choose the Construction Model for economy and lightweight porta-
bility, the Factory Model for full remote capabilities, and the Advanced
Process Model for pulsed MIG applications.
• The K1728-5, -6, -7, -8, Invertec® V350-PRO includes Twist-Mate™
Cable Plugs (K852-70, quantity 2) for easy, tool-less cable connection.
The K1728-13 Invertec® V350-PRO Factory (Tweco®) model includes
Tweco® cable receptacles. Tweco® plugs are not included.
• All input voltages and frequencies are both single and three phase
rated—no output derating necessary on single phase.
• Bright, large digital amp and volt meters are easy to monitor—even in
sunlight—and presettable for precise procedure control.
• 5-425 amp output range for all recommended processes from DC TIG
to arc gouging.
• Rugged skid and tube handles for convenience and added protection.
• Input voltage from 208-575 and 50 and 60 Hz operation—this one
machine is capable of running on virtually any input power supply.
• Manufactured under a quality system certified to ISO 9001
requirements and ISO 14001 environmental standards.
• Touch-StartTIG® for contamination-free starts.
• Three-year warranty on parts and labor. Two-year extended warranty
available in the U.S.
• Low power consumption for energy savings—88% efficiency.
• Advanced Process model includes Pulsed MIG, Pulse-On-Pulse®
(1)
and Power Mode® for best-in-class welding performance.
Advanced Process Panel only.
• Parallel two units for 700A carbon arc gouging.
TECHNICAL SPECIFICATIONS
Rated Output
Current/
Voltage/Duty Cycle
Dimensions
H x W x D
inches (mm)
Net
Weight
lbs.(kg)
Product
Name
Product
Number
Input Current @
Rated Output
Output
Range
Model
Input Power
200-208/230/380-415/
460/575/1/3/50/60
208/230/415/
460/575/1/3/50/60
K1728-5
K1728-6
Construction
Factory
350A/34V/60%
300A/32V/100%
3ph: 50/42/28-26/23/18
1ph: 94/85/54/42/37
3ph: 41-39/36/23-22/19/16
1ph: 76/69/41/36/31
5-425A
14.8 x 13.3 x 27.8
81
Max OCV: (376 x 338 x 709)
80V DC
(36.7)
Invertec®
K1728-7 Advanced Process
V350-PRO K1728-13
Factory (Tweco®)
CE
K1728-8
200-220/380-400/
415-440/1/3/50/60
350A/34V/60% (3ph)
320A/33V/60% (1ph)
300A/32V/100% (3ph)
275A/31V/100% (1ph)
3ph: 48/28-27/26-24
1ph: not rec’d - 82/55-50/48-45
3ph: 41-37/28-22/22-21
86.5
(37.4)
-
1ph: not rec’d 64/44-43/38-35
Tweco® is a registered trademark of Thermadyne.
Publication E5.91 11/07
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A CLOSER LOOK
FEATURES
M
Key Controls
A ) Large, bright, easy to read meters
B ) Local/remote output control
C) Mode selection switch
D) Remote Output Control Receptacles—6- & 14-pin
E ) Negative and Positive Twist-Mate® or Tweco®
Output Teminals
F ) Wire Feeder Voltmeter Polarity Switch
G) Circuit Breaker Reset Buttons
H) On/Off Switch
I ) Hot Start Control
J ) Arc Control Knob
K ) Weld Terminals on or remotely controlled
L ) Preset Output Amps and Voltage Control
M) Thermal Overload Indicator Light
A
L
B
C
K
J
I
D
E
H
Shown:
G
F
Invertec® V350-PRO
Factory Model
®
Pulse-On-Pulse
• Uses a sequence of varying pulse wave shapes to produce a TIG-like bead appearance and
excellent weld properties when MIG welding aluminum.
• Pulse-On-Pulse® controls arc length and heat input together, making it easier to achieve good
penetration.
For more information see Nextweld® Document NX-2.10
Pulse-On-Pulse® on 3mm Aluminum
®
Power Mode
• Uses high-speed regulation of output power to deliver extremely fast response to changes in the
arc, for example, when using a whip technique.
• Improved MIG welding performance, including low spatter, very uniform, consistent bead wetting
and controlled penetration.
• Great for low voltage applications on thin steel and stainless steel material less than 20 gauge
(0.7 mm).
• Delivers excellent arc characteristics on aluminum and other alloys such as silicon bronze and
nickel alloys.
Power Mode® aids
bead wetting
and penetration
on aluminum.
Power Mode® reduces
spatter and improves
bead appearance,
even for low voltage
procedures on
stainless.
PULSE FREQUENCY
Peak
For more information see Nextweld® Document NX-2.60
Ramp Up
Tail Out
Pulsed MIG
• Varies weld current between peak (high heat) and background (low heat) current to provide
better control of heat input.
Background
Step Off
• Reduces warping and burnthrough on thin materials.
TIME
• Enables in-the-flat, horizontal, vertical up, or overhead welding without a slag system. Great for
hard automation, robotic, and high production semiautomatic applications.
• Optimized GMAW-P waveforms are available to use on aluminum, carbon steel, high strength
low alloy steel, stainless steel, and nickel alloys.
Low Heat
(Background)
High Heat
(Peak)
For more information see Nextweld® Document NX-2.70
Invertec® V350-PRO
[3]
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SYSTEM SELECTION
®
INVERTEC V350-PRO MODELS
®
Construction Model
(K1728-6 with Twist-Mate Cable
Advanced Process Model
(K1728-7)
(K1728-5)
Receptacles)
®
Our lightest, most portable model at a
value price for conventional MIG, cored,
stick, arc gouging and non-remote output
control DC TIG applications.
(K1728-13 with Tweco Cable
• Standard Advanced Process Panel adds:
– Pulsed MIG
Receptacles)
• Adds full remote capabilities and auto-
detect local/remote override control.
• Versatile multi-process machine for
MIG, cored, stick, TIG and arc gouging
applications.
– Lincoln’s® Power Mode®
– Lincoln’s® Pulse-on-Pulse®
• Standard full remote capabilities and
auto-detect local/remote override
control.
Great For:
• Construction, maintenance or shop
welding.
• Optional Advanced Process Panel adds:
– Pulsed MIG
• Advanced multi-process machine for
pulsed MIG, cored, stick, TIG and arc
gouging applications.
Compatible with:
• LN-25-PRO or LN-15 Across-the-Arc
model wire feeders.
– Lincoln’s® Power Mode®
– Lincoln’s® Pulse-on-Pulse®
Great For:
• 6-pin and 14-pin MS connector not
included.
Great For:
• Construction or large-scale production
factory applications.
• High-end pulsed MIG applications.
Compatible with:
• LF-72, LF-74, LN-10, DH-10, LN-15,
and LN-25-PRO wire feeders.
• 6-pin and 14-pin MS-type connectors.
Compatible with:
• LF-72, LF-74, LN-10, DH-10, LN-15,
and LN-25-PRO wire feeders.
• 6-pin and 14-pin MS-type connectors.
Factory Model
V350-PRO INVERTER RACKS
• An ideal system to group several inverter power sources in an industrial portable package. Entire system
meets National Electric Code (NEC) Standards.
• Includes Invertec® V350-PRO Factory (Tweco®) Model (K1728-13). This special rack version has all the
same features as the factory model with added IP23S rating for outdoor use and Tweco® cable
receptacles.
Order:
K2667-1 4-Pack Inverter Rack with 4 Invertec® V350-PRO Factory (Tweco®) Power Sources
K2667-2 6-Pack Inverter Rack with 6 Invertec® V350-PRO Factory (Tweco®) Power Sources
Invertec® V350-PRO
[4]
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SYSTEM SELECTION
®
READY-PAK PACKAGES
Fully assembled and ready to weld—just add wire and gas. Select
a Ready-Pak® and use one order number on your order form.
V350-PRO Factory Model / LF-72 Heavy Duty Wire Feeder
(for non-pulsed MIG Welding)
Order K2437-1
• V350-PRO Factory Model
• LF-72 Heavy Duty Wire Feeder
• Work and Wire Feeder 2/0 Welding Cable Package
• Harris® Flowmeter Regulator and Hose
• Heavy Duty Inverter and Wire Feeder Cart
V350-PRO Advanced Process Model / LF-72 Heavy Duty
Wire Feeder (for MIG and pulsed MIG Welding)
Order K2438-1
• V350-PRO Advanced Process Model
• LF-72 Heavy Duty Wire Feeder
• Work and Wire Feeder 2/0 Welding Cable Package
• Harris® Flowmeter Regulator and Hose
• Heavy Duty Inverter and Wire Feeder Cart
Shown:
Invertec® V350-PRO Factory Model/
LF-72 Heavy Duty Wire Feeder Ready-Pak®
TYPICAL V350-PRO CONSTRUCTION MODEL SYSTEMS
For specific welding applications, assemble the products listed to
best suit your needs.
V350-PRO Construction Model / LN-25 Wire Feeder
®
(for Innershield Welding)
• V350-PRO Construction Model
• LN-25 PRO
K1728-5
K2613-1
• .068"-3/32" (1.8-2.4 mm) Drive Roll
KP653-3/32
• Work and Wire Feeder 2/0 Welding Cable Package K1803-1
• Magnum® Flux-Cored Gun, 15 ft. (4.5 m), 350 Amps K126-2
QUALITY AND RELIABILITY
Robust Design
Safety, reliability and serviceability are built into Lincoln’s inverter design.
• Invertec® inverter models operate at a high efficiency (88-90%)
and are capable of operating from a universal 3 phase input
voltage (208 to 575 volts).
• Storage Temperature Range: -40ºC to +40ºC (-40ºF to 104ºF).
• Double insulation and varnish on main transformer.
• Designed to the IEC/EN 60974-1 standard. Meets tough NEMA
EW 1, CSA NRTL/C standards.
• Thermostatically protected.
• Electronic output over-current protection and electronic input
over-voltage protection.
• Meets rigorous IP21S or IP23S environmental rating.
• Operating Temperature Range: -20ºC to +40ºC (-4ºF to 104ºF).
• Fan-as-Needed™ (F.A.N.) minimizes thermal cycling of internal
machine components, minimizes internal contamination when not
welding, and saves on electricity costs.
Invertec® V350-PRO
[5]
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RECOMMENDED OPTIONS
Dual Cylinder Kit
GENERAL OPTIONS
Permits side-by-side mounting of
two full size gas cylinders, with
easy loading. For use with
K1764-1 cart.
Advanced Process Panel
Includes Pulsed MIG, Pulse-On-
Pulse® and Power Mode®
capabilities. Alpha-numeric
display for accurate setting. For
V350-PRO Factory Model only.
Order K1763-1
Order K1702-1
Valet Style Undercarriage
Offers a unique pull-out handle. It
provides cable storage and the
ultimate in portability.
Deluxe Adjustable Gas
Regulator & Hose Kit
Order K1838-1
Accommodates CO2, Argon,
or Argon-blend gas cylinders.
Includes a cylinder pressure
gauge, dual scale flow gauge
and 4.3 ft. (1.3 m) gas hose.
Order K586-1
STICK OPTIONS
Accessory Kit
For stick welding. Includes 35 ft.
(10.7 m) 2/0 electrode cable with
lug, 30 ft. (9.1 m) 2/0 work cable
with lugs, headshield, filter plate,
cover plate, work clamp and elec-
trode holder. 400 amp capacity.
Order K704
Work and Wire Feeder 2/0
Weld Cable Package
Includes Twist-Mate™ connectors,
work clamps, 15 ft. (4.5 m) work
cable and 10 ft. (3.0 m) electrode
cable. Rated 350 amps, 60%
duty cycle.
Accessory Kit
For stick welding. Includes 20 ft.
(6.1 m) #6 electrode cable with
lug, 15 ft. (4.6 m) #6 work cable
with lugs, headshield, work
clamp, electrode holder and
sample pack of mild steel
electrode. 200 amp capacity.
Order K875
Order K1803-1
™
Twist-Mate Cable Plug
For connecting welding cable to
output terminal receptacles. For
1/0-2/0 (50-70 mm2) cable.
Order K852-70
™
Twist-Mate Cable Plug
Remote Output Control
Consists of a control box with
choice of two cable lengths.
Permits remote adjustment of
output.
Order K857 for 25 ft. (7.6 m)
Order K857-1 for 100 ft. (30 m)
For connecting welding cable to
output terminal receptacles. For
2/0-3/0 (70-95 mm2) cable.
Order K852-95
™
Twist-Mate Cable Receptacle
For connecting welding cable to
Twist-Mate™ Cable Plug.
Order K1759-70 for 1/0-2/0
(50-70 mm2) cable
TIG OPTIONS
Order K1759-95 for 2/0-3/0
Pro-Torch™ TIG Torches
A full line of air-cooled and water-
cooled torches available.
Request Lincoln publication
E12.150
(70-95mm2) cable
™
Twist-Mate to Lug Adapter
For connection of lugged cable
to Twist-Mate™ connectors. 18"
(457 mm) long.
TIG Module
Order K2176-1
Portable, high frequency unit with
gas valve for TIG welding. Rated
at 300 amps/60% duty cycle.
Requires TIG Module Control
Cable.
Inverter and Wire Feeder Cart
Rear-wheeled cart includes front
casters and no-lift gas bottle plat-
form. Convenient handles allow
for easy cable storage while full
length side trays store parts and
tools. Shipped fully assembled.
Small footprint fits through 30"
(762 mm) door.
Order K930-2
Order K1764-1
Invertec® V350-PRO
[6]
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RECOMMENDED OPTIONS
TIG OPTIONS, CONʼT.
TIG OPTIONS, CONʼT.
™
TIG Module Control Cable
(For Factory and Advanced
Process Models only)
Twist-Mate Torch Adapter
For connection of Pro-Torch™ TIG
torches (1 piece cable) to power
sources with gas passing through
the Twist-Mate™ connection. For
use with K1762-2.
9-pin connector at the TIG
Module to 14-pin MS type
connector at the power source.
(Contains input power, remote
control, contactor control, and
ground circuits). For machines
having a 14-pin remote control
and power receptacle.
Order K1622-1 For air-cooled
PTA-9 or PTA-17 torches.
Order K936-1
Order K1622-3 For air-cooled
PTA-26 torches.
TIG Module Control Cable
(For Construction Model only)
9-pin connector at the TIG
Module to a grounded 115V plug.
(Contains input power, and
ground circuits). For machines
having no remote control
capability.
Order K1622-2 For water-cooled
torches.
™
Twist-Mate Torch Adapter
For connection of PTA-9 or
PTA-17V torches (1 piece cable)
to power sources without gas
passing through the Twist-Mate™
connection.
Order K936-4
®
Hand Amptrol
Order K960-1
Provides 25 ft. (7.6 m) of remote
current control for TIG welding.
(6-pin plug connection)
Order K963-3
™
TIG-Mate 17V Air-Cooled
TIG Torch Starter Pack
Get everything you need for TIG
welding in one complete easy-to-
order kit packaged in its own
portable carrying case. Includes:
PTA-17V torch, parts kit, Harris®
flowmeter/regulator, 10 ft. (3.0 m)
gas hose, and work clamp and
cable. Order K2265-1
®
Foot Amptrol
Provides 25 ft. (7.6 m) of remote
current control for TIG welding.
(6-pin plug connection).
Order K870
™
Arc Start Switch
TIG-Mate 17 Air-Cooled
May be used in place of the Foot
or Hand Amptrol®. Comes with a
25 ft. (7.6 m) cable. Attaches to
the TIG torch for convenient finger
control to start and stop the weld
cycle at the current set on the
machine.
TIG Torch Starter Pack
Get everything you need for TIG
welding in one complete easy-to-
order kit packaged in its own
portable carrying case. Includes:
PTA-17 torch, parts kit, Harris®
flowmeter/regulator, 10 ft. (3.0 m)
gas hose, Twist-mate™ adapter,
and work clamp and cable.
Order K2266-1
Order K814
®
Invertec TIG Solenoid Kit
Mounts inside the back of the
V350-PRO. Switches gas flow in
the V350-PRO through the Twist-
Mate™ connector. Includes gas
hose and solenoid. [Not compati-
ble with construction and factory
(Tweco®) models)].
™
TIG-Mate 20 Water-Cooled
TIG Torch Starter Pack
Get everything you need for TIG
welding in one complete easy-to-
order kit packaged in its own
portable carrying case. Includes:
PTW-20 torch, parts kit, Harris®
flowmeter/regulator, 10 ft. (3.0 m)
gas hose, Twist-Mate™ adapter,
work clamp and cable and 10 ft.
(3.0 m) water hose.
Order K1762-2
Order K2267-1
Invertec® V350-PRO
[7]
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®
INVERTEC V350-PRO ORDER FORM
PRODUCT DESCRIPTION
QUANTITY
PRICE
ORDER NUMBER
®
Invertec V350-PRO – Construction Model
K1728-5
K1728-6
K1728-7
K1728-8
®
Invertec V350 PRO – Factory Model
®
Invertec V350-PRO – Advanced Process Model
®
Invertec V350-PRO – CE Model
®
®
Invertec V350-PRO – Factory (Tweco ) Rack Model
K1728-13
®
Ready-Pak Packages
Invertec® V350-PRO Factory Model / LF-72 HeavyDuty
Invertec® V350-PRO Advanced Process Model / LF-72 Heavy Duty
K2437-1
K2438-1
®
Invertec V350-PRO Inverter Racks
4-Pack Inverter Rack (with 4 Invertec® V350-PRO Factory (Tweco®) Power Sources)
6-Pack Inverter Rack (with 6 Invertec® V350-PRO Factory (Tweco®) Power Sources)
Caster Kit for Inverter Racks
K2667-1
K2667-2
K2665-1
Recommended General Options
Advanced Process Panel (Factory Model only)
Deluxe Adjustable Gas Regulator & Hose Kit
Work and Wire Feeder 2/0 Welding Cable Package
Twist-Mate™ Cable Plug, 1/0 - 2/0 (50-70 mm2)
Twist-Mate™ Cable Plug, 2/0 - 3/0 (70-95 mm2)
Twist-Mate™ Cable Receptacle, 1/0 - 2/0 (50-70 mm2)
Twist-Mate™ Cable Receptacle, 2/0 - 3/0 (70-95 mm2)
Twist-Mate™ to Lug Adapter
K1763-1
K586-1
K1803-1
K852-70
K852-95
K1759-70
K1759-95
K2176-1
K1764-1
K1702-1
K1838-1
Inverter and Wire Feeder Cart
Dual Cylinder Kit
Valet Style Undercarriage
Recommended Wire Feeder Options
LF-72 and LF-74
LN-10 and DH-10
LN-15
E8.11
E8.200
E8.60
E8.100
LN-25 PRO
Recommended Stick Options
Accessory Kit: (400 Amps) / (200 Amps)
Remote Output Control: for 25 ft. (7.6 m) / for 100 ft. (30 m)
K704 / K875
K857 / K857-1
Recommended TIG Options
Pro-Torch™ TIG Torches
TIG Module
See Publication E12.150
K930-2
TIG Module Control Cable (Factory/Advanced Process Models)
TIG Module Control Cable (Construction Model)
Hand Amptrol®
K936-1
K936-4
K963-3
K870
Foot Amptrol®
Arc Start Switch
K814
Invertec® TIG Solenoid Kit
K1762-2
K1622-1
K1622-3
K1622-2
K960-1
K2265-1
K2266-1
K2267-1
Twist-Mate™ Torch Adapter: for air-cooled PTA-9 or -17 Torches
for air-cooled PTA-26 Torches
for water-cooled Torches
Twist-Mate™ Torch Adapter (without gas pass through)
TIG-Mate™ 17V Air-Cooled TIG Torch Starter Pack
TIG-Mate™ 17 Air-Cooled TIG Torch Starter Pack
TIG-Mate™ 20 Water-Cooled TIG Torch Starter Pack
TOTAL:
C U S T O M E R A S S I S T A N C E P O L I C Y
The business of The Lincoln Electric Company® is manufacturing and selling high quality welding equipment, consumables, and cutting equipment. Our challenge is to meet the needs of
our customers and to exceed their expectations. On occasion, purchasers may ask Lincoln Electric for information or advice about their use of our products. Our employees respond to
inquiries to the best of their ability based on information provided to them by the customers and the knowledge they may have concerning the application. Our employees, however, are not
in a position to verify the information provided or to evaluate the engineering requirements for the particular weldment. Accordingly, Lincoln Electric does not warrant or guarantee or assume
any liability with respect to such information or advice. Moreover, the provision of such information or advice does not create, expand, or alter any warranty on our products. Any express or
implied warranty that might arise from the information or advice, including any implied warranty of merchantability or any warranty of fitness for any customers’ particular purpose is
specifically disclaimed.
Lincoln Electric is a responsive manufacturer, but the selection and use of specific products sold by Lincoln Electric is solely within the control of, and remains the sole responsibility of the
customer. Many variables beyond the control of Lincoln Electric affect the results obtained in applying these types of fabrication methods and service requirements.
Subject to Change – This information is accurate to the best of our knowledge at the time of printing. Please refer to www.lincolnelectric.com for any updated information.
®
THE LINCOLN ELECTRIC COMPANY
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