ESAB LAF 1001 User manual

Instruction manual
0449 503 101 GB 20230412 Valid for: serial no. 536-xxx-xxxx
LAF1001/
LAF 1001M

TABLE OF CONTENTS
0449 503 101 © ESAB AB 2023
1SAFETY ....................................................................................................... 4
1.1 Meaning of symbols ............................................................................... 4
1.2 Safety precautions ................................................................................. 4
2INTRODUCTION.......................................................................................... 7
3TECHNICAL DATA ...................................................................................... 8
4INSTALLATION............................................................................................ 9
4.1 Location................................................................................................... 9
4.2 Connections............................................................................................ 10
5OPERATION ................................................................................................ 11
5.1 Controls................................................................................................... 11
6MAINTENANCE........................................................................................... 12
6.1 Cleaning .................................................................................................. 12
6.1.1 Welding power source.......................................................................... 12
6.1.2 Contactor.............................................................................................. 12
7ORDERING SPARE PARTS ........................................................................ 13
DIAGRAM ............................................................................................................ 14
CONNECTION INSTRUCTION............................................................................ 16
ORDERING NUMBERS....................................................................................... 18
Rights reserved to alter specifications without notice.

1 SAFETY
0449 503 101 -4- © ESAB AB 2023
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
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
0449 503 101 -5- © ESAB AB 2023
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
0449 503 101 -6- © ESAB AB 2023
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!
CAUTION!
This product is solely intended for arc welding.
WARNING!
Do not use the power source for thawing frozen pipes.
CAUTION!
Class A equipment is not intended for use in residential
locations where the electrical power is provided by the
public low-voltage supply system. There may be
potential difficulties in ensuring electromagnetic
compatibility of class A equipment in those locations,
due to conducted as well as radiated disturbances.
NOTE!
Dispose of electronic equipment at the recycling
facility!
In observance of European Directive 2012/19/EC on
Waste Electrical and Electronic Equipment and its
implementation in accordance with national law,
electrical and/or electronic equipment that has reached
the end of its life must be disposed of at a recycling
facility.
As the person responsible for the equipment, it is your
responsibility to obtain information on approved
collection stations.
For further information contact the nearest ESAB dealer.
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.

2 INTRODUCTION
0449 503 101 -7- © ESAB AB 2023
2 INTRODUCTION
LAF 1001/ LAF 1001M are remote-controlled 3-phase welding power sources intended for
highly productive mechanised gas metal arc welding (MIG/MAG) or submerged arc welding
(SAW).
The welding power sources are fan-cooled and are monitored by a thermal cutout against
overload. When the thermal cutout is deployed the yellow lamp on the front panel illuminates
automatically. The reset is carried out automatically when the temperature has decreased to
a permitted level.

3 TECHNICAL DATA
0449 503 101 -8- © ESAB AB 2023
3 TECHNICAL DATA
LAF 1001 LAF 1001M
Mains voltage 380/400/415/500 V, 3~ 50 Hz
440/550 V, 3~ 60 Hz
230/380/400/415/500 V,
3~50Hz
230/440/550 V, 3~ 60 Hz
Zmax 0.04 Ohm 0.04 Ohm
Primary current Imax 84 A Imax 138 A
Values of the conventional load:
100% duty cycle 800 A/44 V 800 A/44 V
60% duty cycle 1000 A/44 V 1000 A/44 V
Setting range SAW 100-1000 A/24-44 V 100-1000 A/24-44 V
Ssc min 4.8 MVA 4.8 MVA
No-load voltage 53 V 56 V
No-load power 180 W 178 W
Efficiency at maximum
current 90% 86%
Power factor at maximum
current 0.95 0.96
Apparent power I2at
maximum current
51.6 kVA 52.9 kVA
Active power I2at
maximum current
48.9 kW 51.0 kW
Operating temperature -10 to +40 °C (+14 to +104 °F) -10 to +40 °C (+14 to +104 °F)
Weight 330 kg (727.5 lb) 330 kg (727.5 lb)
Dimensions L × W × H 646 × 552 × 1090 mm
(25.4×21.7×42.9in.)
646 × 552 × 1090 mm
(25.4×21.7×42.9in.)
Isolation class transformer H H
Enclosure class IP23 IP23
Application class
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
0449 503 101 -9- © ESAB AB 2023
4 INSTALLATION
The installation must be carried out by a professional.
NOTE!
Mains supply requirements
This equipment complies with IEC 61000-3-12 provided that the short-circuit power is
greater than or equal to Sscmin at the interface point between the user's supply and
the public system. It is the responsibility of the installer or user of the equipment to
ensure, by consultation with the distribution network operator if necessary, that the
equipment is connected only to a supply with a short-circuit power greater than or
equal to Sscmin. Refer to the technical data in the TECHNICAL DATA chapter.
4.1 Location
WARNING!
Secure the equipment - particularly
if the ground is uneven or sloping.
• Place the welding power source on a level foundation.
• Make sure there is nothing to prevent the cooling.
Lifting instructions

4 INSTALLATION
0449 503 101 - 10 - © ESAB AB 2023
4.2 Connections
• On delivery the welding power source is connected for
400 V.
• For other supply voltage:
Remove the left side plate.
Perform the switchings on the main and control
transformer in accordance with the section "Connection
instruction".
• Select the mains cable with the correct cable area and
fuse the cable with the correct fuse in accordance with
local regulations (see the "Main connection" table
below).
• Remove the front plates (x 2).
•
Connect the ground cable to the screw marked .
• Tighten the cable clamp (1).
• Connect the mains cables to the main connection terminals L1, L2 and L3 (5).
• Connect the control cable between the welding power source and the control box to
the 28-pin connector (2) on the inside of the welding power source.
• Connect the 1-pin measuring cable (4) for measuring the arc voltage to the return
cable/welding head.
• Connect a suitable welding and return cable in the connectors (3) marked + and - on
the front of the welding power source.
• Fit the side/ front plates.
Mains connection
LAF 1001 50 Hz 60 Hz
Voltage (V) 380 400 415 500 440 550
Phase current I1eff (A) 67 64 64 52 64 52
Cable area (mm2)4 × 16 4 × 16 4 × 16 4 × 16 4 × 16 4 × 16
Fuse, slow (A) 80 63 63 63 63 63
Miniature circuit breaker (A) 80 80 80 63 80 63
LAF 1001M 50 Hz 60 Hz
Voltage (V) 230 380 400 415 500 230 440 550
Phase current I1eff (A) 108 67 64 64 51 108 64 51
Cable area (mm2)4 × 50 4 × 16 4 × 16 4 × 16 4 × 16 4 × 50 4 × 16 4 × 16
Fuse, slow (A) 125 80 63 63 63 125 63 63
Miniature circuit breaker (A) 125 80 80 80 63 125 80 63
NOTE!
The mains cable areas and fuse sizes as shown above are in accordance with
Swedish regulations. For other regions, supply cables must be suitable for the
application and meet local and national regulations.