ESAB LAF 1601M User manual

Instruction manual
0449 507 101 GB 20170901 Valid for: serial no. 126-xxx-xxxx
LAF1601 / LAF1601M

TABLE OF CONTENTS
0449 507 101 © ESAB AB 2017
1SAFETY ......................................................................................................... 4
2INTRODUCTION............................................................................................ 7
3TECHNICAL DATA ........................................................................................ 8
4INSTALLATION.............................................................................................. 9
4.1 Location..................................................................................................... 9
4.2 Connections.............................................................................................. 10
5OPERATION .................................................................................................. 12
5.1 Controls..................................................................................................... 12
6MAINTENANCE............................................................................................. 13
6.1 Cleaning .................................................................................................... 13
6.1.1 Welding power source............................................................................ 13
6.1.2 Contactor................................................................................................ 13
7ORDERING SPARE PARTS .......................................................................... 14
DIAGRAM ............................................................................................................. 15
CONNECTION INSTRUCTION............................................................................. 17
ORDERING NUMBERS........................................................................................ 19
Rights reserved to alter specifications without notice.

1 SAFETY
0449 507 101 -4- © ESAB AB 2017
1 SAFETY
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
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
CAUTION!
This product is solely intended for arc welding.

1 SAFETY
0449 507 101 -5- © ESAB AB 2017
WARNING!
Arc welding and cutting can be injurious to yourself and others. Take precautions
when welding and cutting. Ask for your employer's safety practices which should
be based on manufacturers' hazard data.
ELECTRIC SHOCK - Can kill
• Install and earth the unit in accordance with applicable standards
• Do not touch live electrical parts or electrodes with bare skin, wet gloves
or wet clothing
• Insulate yourself from earth and the workpiece
• Ensure your working stance is safe
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
FIRE HAZARD
• Sparks (spatter) can cause fire. Make sure therefore that there are no
inflammable materials nearby
NOISE - Excessive noise can damage hearing
• Protect your ears. Use earmuffs or other hearing protection.
• Warn bystanders of the risk
MALFUNCTION - Call for expert assistance in the event of malfunction.
Read and understand the instruction manual before installing or operating.
PROTECT YOURSELF AND OTHERS!
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.
CAUTION!
Read and understand the instruction manual before
installing or operating.

1 SAFETY
0449 507 101 -6- © ESAB AB 2017
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 507 101 -7- © ESAB AB 2017
2 INTRODUCTION
LAF 1601/ LAF 1601M are remote-controlled 3-phase welding power sources designed for
high-efficiency mechanical 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 507 101 -8- © ESAB AB 2017
3 TECHNICAL DATA
LAF 1601 LAF 1601M
Mains connection 400/415/500 V, 3~ 50 Hz 230/400/415/500 V, 3~ 50 Hz
440/550 V, 3~ 60 Hz 230/440/550V, 3~ 60 Hz
Primary current Imax 136 A 230 A
Permissible load at:
100% duty cycle 1600 A / 44 V 1600 A / 44 V
Setting range 100–1600 A / 24–44 V 100–1600 A / 24–44V
No-load voltage 56 V 56 V
No-load power 230 W 230 W
Efficiency 88% 88%
Power factor at maximum
current 0.84 0.84
Apparent power I2at
maximum current 95.6kVA 87.5 kVA
Active power I2at
maximum current 80 kW 80 kW
Continual sound pressure
at no-load < 70 dB(A) < 70 dB(A)
Weight: 585 kg 585 kg
Dimensions L x W x H: 774 x 598 x 1430 mm 774 x 598 x 1430 mm
Insulation class
(transformer)
H H
Enclosure class IP 23 IP 23
Application class

4 INSTALLATION
0449 507 101 -9- © ESAB AB 2017
4 INSTALLATION
The installation must be carried out by a professional.
NOTE!
Mains supply requirements
High power equipment may, due to the primary current drawn from the mains
supply, influence the power quality of the grid. Therefore connection restrictions
or requirements regarding the maximum permissible mains impedance or the
required minimum supply capacity at the interface point to the public grid may
apply for some types of equipment (see "TECHNICAL DATA" chapter). In this
case it is the responsibility of the installer or user of the equipment to ensure, by
consultation with the distrubution network operator if necessary, that the
equipment may be connected.
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 507 101 - 10 - © ESAB AB 2017
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 connection
instruction in "CONNECTION INSTRUCTION"
chapter.
• Select the mains cable with the correct cable area
and fuse the cable with the correct fuse in
accordance with local regulations (see the table
below in "Mains connection" section).
• 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 1601 3~ 50 Hz 3~ 60 Hz
Mains voltage 400 / 415 V 500 V 440 V 550 V
Primary current Imax 136 A 108 A 136 A 108 A
Phase current I1eff 136 A 108 A 136 A 108 A
Cable area 3×70 + 35 mm23×50 + 35 mm23×70 + 35 mm23×50 + 35 mm2
Fuse anti-surge 160 A 125 A 160 A 125 A
LAF 1601M 3~ 50 Hz 3~ 60 Hz
Mains voltage 230 V 400 / 415
V
500 V 230 V 440 V 550 V
Primary current Imax 230 A 136 A 108 A 230 A 136 A 108 A
Phase current I1eff 230 A 136 A 108 A 230 A 136 A 108 A
Cable area 3×120 +
70 mm2
3×70 + 35
mm2
3×50 + 35
mm2
3×120 +
70 mm2
3×70 + 35
mm2
3×50 + 35
mm2
Fuse anti-surge 250 A 160 A 125 A 250 A 160 A 125 A