ESAB Warrior 350i MV CC User manual

Instruction manual
0463 441 101 GB 20220729 Valid for: 635-, 230-xxx-xxx
Warrior™350iMVCC/CV
Warrior™400iMVCC/CV

TABLE OF CONTENTS
0463 441 101 © ESAB AB 2022
1SAFETY ....................................................................................................... 3
1.1 Meaning of symbols ............................................................................... 3
1.2 Safety precautions ................................................................................. 3
1.3 User responsibility ................................................................................. 7
1.4 California Proposition 65 Warning........................................................ 9
2INTRODUCTION.......................................................................................... 10
2.1 Overview ................................................................................................. 10
2.2 Equipment ............................................................................................... 10
3TECHNICAL DATA ...................................................................................... 11
4INSTALLATION............................................................................................ 13
4.1 General .................................................................................................... 13
4.2 Lifting instructions ................................................................................. 13
4.3 Location................................................................................................... 14
4.4 Mains supply........................................................................................... 14
5OPERATION ................................................................................................ 16
5.1 Connections and control devices ......................................................... 16
5.2 Connection of welding and return cables ............................................ 16
5.3 Turning the mains power on/off ............................................................ 17
5.4 Fan control .............................................................................................. 17
5.5 Symbols and functions .......................................................................... 18
6MAINTENANCE........................................................................................... 21
6.1 Routine maintenance ............................................................................. 21
6.2 Cleaning instructions............................................................................. 21
6.2.1 Cleaning procedure .............................................................................. 22
6.3 Welding torch.......................................................................................... 22
7TROUBLESHOOTING ................................................................................. 24
8ORDERING SPARE PARTS ........................................................................ 25
DIAGRAM ............................................................................................................ 26
ORDERING NUMBERS....................................................................................... 27
ACCESSORIES ................................................................................................... 28
Rights reserved to alter specifications without notice.

1 SAFETY
0463 441 101 -3- © ESAB AB 2022
1 SAFETY
1.1 Meaning of symbols
As used throughout this manual: Means Attention! Be Alert!
DANGER!
Means immediate hazards which, if not avoided, will result in immediate,
serious personal injury or loss of life.
WARNING!
Means potential hazards which could result in personal injury or loss of life.
CAUTION!
Means hazards which could result in minor personal injury.
WARNING!
Before use, read and understand the instruction manual
and follow all labels, employer´s safety practices and
Safety Data Sheets (SDSs).
1.2 Safety precautions
WARNING!
These Safety Precautions are for your protection. They summarise precautionary
information from the references listed in Additional Safety Information section. Before
performing any installation or operating procedures, be sure to read and follow the
safety precautions listed below as well as all other manuals, material safety data
sheets, labels, etc. Failure to observe Safety Precautions can result in injury or death.
PROTECT YOURSELF AND OTHERS
Some welding, cutting and gouging processes are noisy and require
ear protection. The arc, like the sun, emits ultraviolet (UV) and other
radiation and can injure skin and eyes. Hot metal can cause burns.
Training in the proper use of the processes and equipment is essential
to prevent accidents. Therefore:
1. Wear a welding helmet fitted with a proper shade of filter to protect your face and eyes
when welding or watching.
2. Always wear safety glasses with side shields in any work area, even if welding
helmets face shields and goggles are also required.
3. Use a face shield fitted with the correct filter and cover plates to protect your eyes,
face, neck and ears from sparks and rays of the arc when operating or observing
operations. Warn bystanders not to watch the arc and not to expose themselves to the
rays of the electric-arc or hot metal.
4. Wear flameproof gauntlet type gloves, heavy long-sleeve shirt, cuff less trousers,
high-topped shoes and a welding helmet or cap for protection, to protect against arc
rays and hot sparks or hot metal. A flameproof apron may also be desirable as
protection against radiated heat and sparks.

1 SAFETY
0463 441 101 -4- © ESAB AB 2022
5. Hot sparks or metal can lodge in rolled up sleeves, trouser cuffs, or pockets. Sleeves
and collars should be kept buttoned and open pockets eliminated from the front of
clothing.
6. Protect other personnel from arc rays and hot sparks with a suitable non-flammable
partition or curtains.
7. Use goggles over safety glasses when chipping slag or grinding. Chipped slag may be
hot and can fly far. Bystanders should also wear goggles over safety glasses.
FIRES AND EXPLOSIONS
Heat from flames and arcs can start fires. Hot slag or sparks can also
cause fires and explosions. Therefore:
1. Protect yourself and others from flying sparks and hot metal.
2. Remove all combustible materials well away from the work area or cover the materials
with a protective non-flammable covering. Combustible materials include wood, cloth,
sawdust, liquid and gas fuels, solvents, paints and coatings paper, etc.
3. Hot sparks or hot metal can fall through cracks or crevices in floors or wall openings
and cause a hidden smoldering fire or fires on the floor below. Make certain that such
openings are protected from hot sparks and metal.
4. Do not weld, cut or perform other hot work until the work piece has been completely
cleaned so that there are no substances on the work piece which might produce
flammable or toxic vapors. Do not do hot work on closed containers, they may
explode.
5. Have fire extinguishing equipment handy for instant use, such as a garden hose,
water pail, sand bucket, or portable fire extinguisher. Be sure you are trained in its
use.
6. Do not use equipment beyond its ratings. For example, an overloaded welding cable
can overheat and create a fire hazard.
7. After completing operations, inspect the work area to make certain there are no hot
sparks or hot metal which could cause a later fire. Use fire watchers when necessary.
ELECTRICAL SHOCK
Contact with live electrical parts and ground can cause severe injury
or death. DO NOT use AC welding current in damp areas, if movement
is confined, or if there is danger of falling. Therefore:
1. Be sure the power source frame (chassis) is connected to the ground system of the
input power.
2. Connect the workpiece to a good electrical ground.
3. Connect the work cable to the workpiece. A poor or missing connection can expose
you or others to a fatal shock.
4. Use well-maintained equipment. Replace worn or damaged cables.
5. Keep everything dry, including clothing, work area, cables, torch/electrode holder and
power source.
6. Make sure that all parts of your body are insulated from both the work piece and from
the ground.
7. Do not stand directly on metal or the earth while working in tight quarters or a damp
area; stand on dry boards or an insulating platform and wear rubber-soled shoes.
8. Put on dry, hole-free gloves before turning on the power.
9. Turn off the power before removing your gloves.
10. Refer to ANSI/ASC Standard Z49.1 for specific grounding recommendations. Do not
mistake the work lead for a ground cable.

1 SAFETY
0463 441 101 -5- © ESAB AB 2022
ELECTRIC AND MAGNETIC FIELDS
May be dangerous. Electric current flowing through any conductor
causes localized Electric and Magnetic Fields (EMF). Welding and
cutting current creates EMF around welding cables and welding
machines. Therefore:
1. Welders having pacemakers should consult their physician before welding. EMF may
interfere with some pacemakers.
2. Exposure to EMF may have other health effects which are unknown.
3. Welders should use the following procedures to minimise exposure to EMF:
a) Route the electrode and work cables together. Secure them with tape when
possible.
b) Never coil the torch or work cable around your body.
c) Do not place your body between the torch and work cables. Route cables on
the same side of your body.
d) Connect the work cable to the workpiece as close as possible to the area being
welded.
e) Keep welding power source and cables as far away from your body as
possible.
FUMES AND GASES
Fumes and gases, can cause discomfort or harm, particularly in
confined spaces. Shielding gases can cause asphyxiation. Therfore:
1. Keep your head out of the fumes. Do not breathe the fumes and gases.
2. Always provide adequate ventilation in the work area by natural or mechanical means.
Do not weld, cut or gouge on materials such as galvanized steel, stainless steel,
copper, zinc, lead beryllium or cadmium unless positive mechanical ventilation is
provided. Do not breathe fumes from these materials.
3. Do not operate near degreasing and spraying operations. The heat or arc can react
with chlorinated hydrocarbon vapors to form phosgene, a highly toxic gas and other
irritant gases.
4. If you develop momentary eye, nose or throat irritation while operating, this is an
indication that ventilation is not adequate. Stop work and take necessary steps to
improve ventilation in the work area. Do not continue to operate if physical discomfort
persists.
5. Refer to ANSI/ASC Standard Z49.1 for specific ventilation recommendations.
6. WARNING: This product when used for welding or cutting, produces fumes or gases
which contain chemicals known to the State of California to cause birth defects and in
some cases cancer (California Health & Safety Code §25249.5 et seq.)
CYLINDER HANDLING
Cylinders, if mishandled, can rupture and violently release gas. A
sudden rupture of cylinder valve or relief device can injure or kill.
Therefore:
1. Locate cylinders away from heat, sparks and flames. Never strike an arc on a cylinder.
2. Use the proper gas for the process and use the proper pressure reducing regulator
designed to operate from the compressed gas cylinder. Do not use adaptors. Maintain
hoses and fittings in good condition. Follow manufacturer's operating instructions for
mounting regulator to a compressed gas cylinder.

1 SAFETY
0463 441 101 -6- © ESAB AB 2022
3. Always secure cylinders in an upright position by chain or strap to suitable hand
trucks, undercarriages, benches, wall, post or racks. Never secure cylinders to work
tables or fixtures where they may become part of an electrical circuit.
4. When not in use, keep cylinder valves closed. Have valve protection cap in place if
regulator is not connected. Secure and move cylinders by using suitable hand trucks.
MOVING PARTS
Moving parts, such as fans, rotors and belts can cause
injury. Therefore:
1. Keep all doors, panels, guards and covers closed and securely in place.
2. Stop engine or drive systems before installing or connecting unit.
3. Have only qualified people remove covers for maintenance and troubleshooting as
necessary
4. To prevent accidental starting of equipment during service, disconnect negative (-)
battery cable from battery.
5. Keep hands, hair, loose clothing and tools away from moving parts.
6. Reinstall panels or covers and close doors when service is finished and before
starting engine.
WARNING!
FALLING EQUIPMENT CAN INJURE
• Only use lifting eye to lift unit. Do NOT use running gear, gas cylinders or any
other accessories.
• Use equipment of adequate capacity to lift and support unit.
• If using lift forks to move unit, be sure forks are long enough to extend beyond
opposite side of unit.
• Keep cables and cords away from moving vehicles when working from an
aerial location.
WARNING!
EQUIPMENT MAINTENANCE
Faulty or improperly maintained equipment can cause injury or death.
Therefore:
1. Always have qualified personnel perform the installation, troubleshooting and
maintenance work. Do not perform any electrical work unless you are
qualified to perform such work.
2. Before performing any maintenance work inside a power source, disconnect
the power source from the incoming electrical power.
3. Maintain cables, earthing wire, connections, power cord and power supply in
safe working order. Do not operate any equipment in faulty condition.
4. Do not abuse any equipment or accessories. Keep equipment away from
heat sources such as furnaces, wet conditions such as water puddles, oil or
grease, corrosive atmospheres and inclement weather.
5. Keep all safety devices and cabinet covers in position and in good repair.
6. Use equipment only for its intended purpose. Do not modify it in any manner.

1 SAFETY
0463 441 101 -7- © ESAB AB 2022
CAUTION!
ADDITIONAL SAFETY INFORMATION
For more information on safe practices for electric arc welding and cutting
equipment, ask your supplier for a copy of “Precautions and Safe Practices for
Arc Welding, Cutting and Gouging”, Form 52-529.
The following publications are recommended:
• ANSI/ASC Z49.1 - “Safety in Welding and Cutting”
• AWS C5.5 - “Recommended Practices for Gas Tungsten Arc Welding”
• AWS C5.6 - “Recommended Practices for Gas Metal Arc welding”
• AWS SP - “Safe practices” - Reprint, Welding Handbook
• ANSI/AWS F4.1 - “Recommended Safe Practices for Welding and Cutting of
Containers That Have Held Hazardous Substances”
• OSHA 29 CFR 1910 - "Safety and health standards"
• CSA W117.2 - "Code for safety in welding and cutting"
• NFPA Standard 51B, “Fire Prevention During Welding, Cutting, and Other Hot
Work"
• CGA Standard P-1, “Precautions for Safe Handling of Compressed Gases in
Cylinders”
• ANSI Z87.1, "Occupational and Educational Personal Eye and Face
Protection Devices"
1.3 User responsibility
Users of ESAB equipment have the ultimate responsibility for ensuring that anyone who
works on or near the equipment observes all the relevant safety precautions. Safety
precautions must meet the requirements that apply to this type of equipment. The following
recommendations should be observed in addition to the standard regulations that apply to
the workplace.
All work must be carried out by trained personnel well-acquainted with the operation of the
equipment. Incorrect operation of the equipment may lead to hazardous situations which can
result in injury to the operator and damage to the equipment.
1. Anyone who uses the equipment must be familiar with:
○ its operation
○ location of emergency stops
○ its function
○ relevant safety precautions
○ welding and cutting or other applicable operation of the equipment
2. The operator must ensure that:
○ no unauthorised person is stationed within the working area of the equipment
when it is started up
○ no-one is unprotected when the arc is struck or work is started with the
equipment
3. The workplace must:
○ be suitable for the purpose
○ be free from drafts

1 SAFETY
0463 441 101 -8- © ESAB AB 2022
4. Personal safety equipment:
○ Always wear recommended personal safety equipment, such as safety glasses,
flame-proof clothing, safety gloves
○ Do not wear loose-fitting items, such as scarves, bracelets, rings, etc., which
could become trapped or cause burns
5. General precautions:
○ Make sure the return cable is connected securely
○ Work on high voltage equipment may only be carried out by a qualified
electrician
○ Appropriate fire extinguishing equipment must be clearly marked and close at
hand
○ Lubrication and maintenance must not be carried out on the equipment during
operation
WARNING!
Arc welding and cutting can be injurious to yourself and others. Take precautions
when welding and cutting.
ELECTRIC SHOCK - Can kill
• Install and ground the unit in accordance with instruction manual.
• Do not touch live electrical parts or electrodes with bare skin, wet gloves or
wet clothing.
• Insulate yourself from work and ground.
• Ensure your working position is safe
ELECTRIC AND MAGNETIC FIELDS - Can be dangerous to health
• Welders having pacemakers should consult their physician before welding.
EMF may interfere with some pacemakers.
• Exposure to EMF may have other health effects which are unknown.
• Welders should use the following procedures to minimize exposure to
EMF:
○ Route the electrode and work cables together on the same side of
your body. Secure them with tape when possible. Do not place your
body between the torch and work cables. Never coil the torch or work
cable around your body. Keep welding power source and cables as
far away from your body as possible.
○ Connect the work cable to the workpiece as close as possible to the
area being welded.
FUMES AND GASES - Can be dangerous to health
• Keep your head out of the fumes.
• Use ventilation, extraction at the arc, or both, to take fumes and gases
away from your breathing zone and the general area.
ARC RAYS - Can injure eyes and burn skin
• Protect your eyes and body. Use the correct welding screen and filter lens
and wear protective clothing.
• Protect bystanders with suitable screens or curtains.
NOISE - Excessive noise can damage hearing
Protect your ears. Use earmuffs or other hearing protection.

1 SAFETY
0463 441 101 -9- © ESAB AB 2022
MOVING PARTS - Can cause injuries
• Keep all doors, panels and covers closed and securely in place. Have only
qualified people remove covers for maintenance and troubleshooting as
necessary. Reinstall panels or covers and close doors when service is
finished and before starting engine.
• Stop engine before installing or connecting unit.
• Keep hands, hair, loose clothing and tools away from moving parts.
FIRE HAZARD
• Sparks (spatter) can cause fire. Make sure that there are no inflammable
materials nearby.
• Do not use on closed containers.
MALFUNCTION - Call for expert assistance in the event of malfunction.
PROTECT YOURSELF AND OTHERS!
WARNING!
Do not use the power source for thawing frozen pipes.
CAUTION!
This product is solely intended for arc welding.
ESAB has an assortment of welding accessories and personal protection equipment
for purchase. For ordering information contact your local ESAB dealer or visit us on
our website.
1.4 California Proposition 65 Warning
WARNING!
Welding or cutting equipment produces fumes or gases which contain chemicals
known in the State of Carlifornia to cause birth defects and, in some cases, cancer.
(California Health & Safety Code Section 25249.5 et seq.)
WARNING!
This product can expose you to chemicals including lead, which are known to the
state of California to cause cancer and birth defects or other reproductive harm.
Wash hands after use.
For more information, go to www.P65Warnings.ca.gov.

2 INTRODUCTION
0463 441 101 - 10 - © ESAB AB 2022
2 INTRODUCTION
2.1 Overview
The Warrior™350iMVCC/CV and Warrior™400iMVCC/CV are welding power source
intended for MIG/MAG welding, as well as for welding with powder filled cored wire
(FCAW-S), for TIG welding, for welding with coated electrodes (MMA) and for arc air
gouging.
The power sources are intended for use with the following wire feed units:
• RobustFeedPRO
• RobustFeedAVS
• Warrior™Feed304
• Warrior™Feed304w
ESAB accessories for the product can be found in the "ACCESSORIES" chapter of
this manual.
2.2 Equipment
The power source is supplied with:
• 16ft. (5m) return cable with earth clamp
• 10ft. (3m) mains cable
• Instruction manual
• Quick start guide
• Safety instruction

3 TECHNICAL DATA
0463 441 101 - 11 - © ESAB AB 2022
3 TECHNICAL DATA
Warrior™ 350i MV CC/CV Warrior™ 400i MV CC/CV
Mains voltage 208-460 V ±10%,
3~50/60Hz
220-460 V ±10%,
3~50/60Hz
Primary current I max
MIG/MAG (GMAW) 39 A 44A
TIG (GTAW) 30 A 34A
MMA (SMAW) 41 A 44A
Idle power 50 W 50W
Setting range
MIG/MAG (GMAW) 16 A/15 V - 350 A/32 V 16A/15V - 400A/34V
TIG (GTAW) 5 A/10 V - 350 A/24 V 5A/10V - 400A/26V
MMA (SMAW) 16 A/20 V - 350 A/34 V 16A/20V - 400A/36V
Permissible load at MIG/MAG (GMAW)
60 % duty cycle 350 A / 32 V 400A/34V
100% duty cycle 300 A / 29 V 300A/29V
Permissible load at TIG (GTAW)
60 % duty cycle 350 A / 24 V 400A/26V
100% duty cycle 300 A / 22 V 300A/22V
Permissible load at MMA (SMAW)
60 % duty cycle at 220VAC - 380A/35.2V
60 % duty cycle 350 A / 34 V 400A/36V
100% duty cycle 300 A / 32 V 400A/32V
Power factor at maximum current 0.95 0.95
Efficiency at maximum current 85 % 85 %
Electrode types Basic
Rutile
Cellulosic
Open-circuit voltage
VRD deactivated 56 V DC peak 56 V DC peak
VRD activated 28 V DC peak 28 V DC peak
Apparent power at maximum
current
14.7 kVA 17.8 kVA
Active power at maximum current 14.0 kW 16.9 kW
Operating temperature 14-104°F (-10 to +40°C)
Transportation temperature -4-131°F (-20 to +55°C)
Constant sound pressure when
idling
<70 dB(A)
Dimensions l × w × h 28.03 x 12.80 x 18.50 in. (712 × 325 × 470 mm)
Weight 134lb. (60.8 kg)

3 TECHNICAL DATA
0463 441 101 - 12 - © ESAB AB 2022
Warrior™ 350i MV CC/CV Warrior™ 400i MV CC/CV
Insulation class H
Enclosure class IP23
Application class
Duty cycle
The duty cycle refers to the time as a percentage of a ten-minute period that you can weld or
cut at a certain load without overloading. The duty cycle is valid for 40°C/104°F, or below.
Enclosure class
The IP code indicates the enclosure class, i.e. the degree of protection against penetration
by solid objects or water.
Equipment marked IP23 is intended for indoor and outdoor use.
Application class
The symbol indicates that the power source is designed for use in areas with increased
electrical hazard.

4 INSTALLATION
0463 441 101 - 13 - © ESAB AB 2022
4 INSTALLATION
4.1 General
The installation must be carried out by a professional.
4.2 Lifting instructions

4 INSTALLATION
0463 441 101 - 14 - © ESAB AB 2022
WARNING!
Secure the equipment - particularly
if the ground is uneven or sloping.
4.3 Location
Position the welding power source such that its cooling air inlets and outlets are not
obstructed.
4.4 Mains supply
NOTE!
Warrior™ 350i MV and Warrior™400iMVCC/CV is designed to work on 3-phase
input supply only.
Make sure that the welding power source is connected to the specified supply voltage with
the recommended fuse rating, miniature circuit breaker (MCB), and mains cable. A protective
earth connection must be made in accordance with regulations.
Recommended fuse sizes and minimum cable area Warrior™ 350i MV CC/CV
Mains
voltage
208 V 3~
50/60 Hz
380 V 3~
50/60 Hz
400 V 3~
50/60 Hz
415 V 3~
50/60 Hz
440 V 3~
50/60 Hz
460 V 3~
50/60 Hz
Mains
cable area 4 × 10 mm² 4 × 6 mm² 4 × 6 mm² 4 × 6 mm² 4 × 6 mm² 4 × 6 mm²
Maximal
current
rating Imax
41 A 22 A 21 A 20 A 19 A 18 A
I1eff
MIG/MAG
TIG
MMA
30 A
23 A
32 A
16 A
13 A
17 A
15 A
12 A
16 A
15 A
12 A
16 A
14 A
11 A
15 A
13 A
11 A
14 A
Fuse
anti-surge
type C MCB
35 A
40 A
20 A
20 A
20 A
20 A
20 A
20 A
20 A
16 A
15 A
16 A
Recommended fuse sizes and minimum cable area Warrior™ 400i MV CC/CV
Mains
voltage
220 V 3~
50/60 Hz
380 V 3~
50/60 Hz
400 V 3~
50/60 Hz
415 V 3~
50/60 Hz
440 V 3~
50/60 Hz
460 V 3~
50/60 Hz
Mains
cable area 4 × 10 mm² 4 × 6 mm² 4 × 6 mm² 4 × 6 mm² 4 × 6 mm² 4 × 6 mm²
Maximal
current
rating Imax
44 A 26 A 25 A 24 A 23 A 22 A

4 INSTALLATION
0463 441 101 - 15 - © ESAB AB 2022
Recommended fuse sizes and minimum cable area Warrior™ 400i MV CC/CV
I1eff
MIG/MAG
TIG
MMA
34 A
27 A
34 A
19 A
15 A
20 A
18 A
14 A
19 A
18 A
14 A
19 A
17 A
13 A
18 A
16 A
12 A
17 A
Fuse
anti-surge
type C MCB
35 A
40 A
25 A
25 A
20 A
20 A
20 A
20 A
20 A
20 A
20 A
20 A
Supply from power generators
The power source can be supplied from different types of generators. However, some
generators may not provide sufficient power for the welding power source to operate
correctly. Generators with Automatic Voltage Regulation (AVR) or with equivalent or better
type of regulation, with rated power ≥40kW, are recommended.

5 OPERATION
0463 441 101 - 16 - © ESAB AB 2022
5 OPERATION
General safety regulations for handling the equipment can be found in the "SAFETY"
chapter of this manual. Read it through before you start using the equipment!
NOTE!
When moving the equipment use intended handle. Never pull the cables.
WARNING!
Electric shock! Do not touch the workpiece or the welding head during operation!
5.1 Connections and control devices
1. Mains power supply switch, O/I 8. Knob for welding method
2. Indicator lamp, yellow, thermal 9. Negative welding terminal
3. Indicator lamp, green, VRD function
(reduced open-circuit voltage)
10. Positive welding terminal
4. Display, current (A) and voltage (V) 11. Circuit breaker, 10 A, 42 V
5. Knob for setting: MMA/TIG Arc air
gouging: Current (A) Mobile Feed
mode: Voltage (V)
12. Connection of wire feed unit
6. Knob for choice of electrode type 13. Connection of remote control unit (option)
7. Knob for inductance (MIG/MAG) and
arc force (MMA):
14. Connection of mains power supply
5.2 Connection of welding and return cables
The power source has two outputs, a positive welding terminal (+) and a negative welding
terminal (-), for connecting welding and return cables. The output to which the welding cable
is connected depends on the welding method or type of electrode used.
Connect the return cable to the other output on the power source. Secure the return cable's
contact clamp to the work piece and ensure that there is good contact between the work
piece and the output for the return cable on the power source.

5 OPERATION
0463 441 101 - 17 - © ESAB AB 2022
• For MIG/MAG welding, the negative welding terminal (-) is used for the return cable and
the positive welding terminal (+) is used for the welding cable.
• For TIG welding, the negative welding terminal (-) is used for the welding torch and the
positive welding terminal (+) is used for the return cable.
• For MMA welding, the welding cable can be connected to the positive welding terminal
(+) or negative welding terminal (-) depending on the type of electrode used. The
connecting polarity is stated on the electrode packaging.
Recommended maximum current values for connection set cables
At an ambient temperature of +25 °C and normal 10 minutes cycle:
Cable area Duty cycle Voltage loss/10m
100% 60%
70mm2360 400 0.25V/100A
95mm2430 500 0.19V/100A
At an ambient temperature of +40 °C and normal 10 minutes cycle:
Cable area Duty cycle Voltage loss/10m
100% 60%
70mm2310 350 0.27V/100A
95mm2370 430 0.20V/100A
Duty cycle
The duty cycle refers to the time as a percentage of a ten-minute period that you can weld or
cut at a certain load without overloading. The duty cycle is valid for 40°C/104°F, or below.
5.3 Turning the mains power on/off
Turn on the mains power by turning switch to the ”ON” (I) position.
Turn the unit off by turning the switch to the ”OFF” (0) position.
Whether the mains power supply is interrupted or the power source is switched off in the
normal manner, welding data will be stored so that it is available next time the unit is started.
CAUTION!
Do not turn off the power source during welding (with load).
5.4 Fan control
The power source has a time control so that the fan continues to run for 6.5 minutes after the
welding has stopped, and the power source switches to energy-saving mode. The fan starts
when the welding starts again.

5 OPERATION
0463 441 101 - 18 - © ESAB AB 2022
5.5 Symbols and functions
Placement of lifting
eye
Voltage Reducing
Device
Thermal protection Basic electrode
Rutile electrode Cellulosic electrode
Arc force Inductance
TIG welding (Live
TIG)
Arc air gouging
MMA welding MIG/MAG welding
Wire feed unit
Mobile feed CV
(Constant voltage)
Protective earth
Voltage reducing device (VRD)
The VRD function ensures that the open-circuit voltage does not exceed 35 V when welding
is not being carried out. This is indicated by a lit VRD LED.
The VRD function is blocked when the system senses that welding has started.
Contact an authorised ESAB service technician to deactivate/activate the function.
Thermal protection
The welding power source has thermal protection that operates if the temperature becomes
too high. When this occurs the welding current is interrupted and an thermal indication LED
is lit.
The thermal protection resets automatically when the temperature has fallen, within normal
working temperature.
Arc force
The arc force is important in determining how the current changes in response to a change in
the arc length. A lower value gives a calmer arc with less spatter.
It only applies to MMA welding.

5 OPERATION
0463 441 101 - 19 - © ESAB AB 2022
Inductance
Higher inductance results in a wider weld pool and less spatter. Lower inductance produces
a harsher sound but a stable, concentrated arc.
It only applies to MIG/MAG welding.
TIG welding
TIG welding melts the metal of the workpiece, using an arc struck from a tungsten electrode,
which does not itself melt. The weld pool and the electrode are protected by shielding gas.
"Live TIG-start"
At a ”Live TIG-start” the tungsten electrode is placed against the workpiece. When the
electrode is lifted away from workpiece, the arc is struck at a limited current level.
For TIG welding, the welding power source shall be supplemented with:
• a TIG torch with gas valve
• an argon gas cylinder
• an argon gas regulator
• tungsten electrode
Arc air gouging
With arc air gouging, a special electrode comprising a carbon rod with a copper casing is
used.
An arc is formed between the carbon rod and the workpiece, which melts the material.
Compressed air is supplied so that the melted material is blown away.
For arc air gouging the power source shall be supplemented with:
• arc air torches
• return cable with clamp
• air pressure
Recommended minimum air requirements
Type of torch Air pressure
psi (kPa)
Air
consumption
cfm (L/min)
Recommended compressor rating
General duty
(accommodat
es flat
electrodes)
(pressure
while torch is
in operation)
Intermittent
use hp (kW)
Continuous
use hp (kW)
ASME
receiver size
lit (gal)
80 (550) 25 (708) 5 (3.7) 7.5 (5.6) 303 (80)
WARNING!
Use only compressed air. Use of combustiblecompressed gases can cause
explosions.

5 OPERATION
0463 441 101 - 20 - © ESAB AB 2022
Recommended for gouging
Electrode Voltage min. Voltage max. Electrode Extension
6 mm (1/4") 36 V 49 V 50 - 76 mm
(2 - 3")
8 mm (5/16") 39 V 52 V
10 mm (3/8") 43 V 52 V
MMA welding
MMA welding may also be referred to as welding with coated electrodes. Striking the arc
melts the electrode, and its coating forms protective slag.
For MMA welding the power source shall be supplemented with:
• welding cable with electrode holder
• return cable with clamp
MIG/MAG and self shielded cored wire welding
An arc melts a continuously supplied wire. The weld pool is protected by shielding gas.
For MIG/MAG and self shielded core wire welding, the power source shall be supplemented
with:
• wire feed unit
• welding torch
• connection cable between power source and wire feed unit
• gas cylinder
• gas regulator (not needed for self shielded core wire welding)
• return cable with clamp