Murex Transarc 250 Guide

GB
Valid for serial no. 819--xxx--xxxx0460 810 074 080825
Transarc 250
Instruction manual and
spare parts list

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TOCe
Rights reserved to alter specifications without notice.
1 DIRECTIVE 3........................................................
2SAFETY 3...........................................................
3 INTRODUCTION 5...................................................
3.1 Equipment 5................................................................
4 TECHNICAL DATA 5.................................................
5 INSTALLATION 6....................................................
5.1 Location 6..................................................................
5.2 Mains supply 6..............................................................
5.3 Mains power supply 7........................................................
6 OPERATION 8.......................................................
6.1 Connections and control devices 8............................................
6.2 Connection of welding and return cable 8.......................................
6.3 Overheating protection 8.....................................................
7 CONTROL PANEL 9..................................................
7.1 Welding data memory 9......................................................
8 MMA WELDING 10....................................................
9 TIG WELDING 11.....................................................
10 MAINTENANCE 12....................................................
10.1 Power source 12.............................................................
10.2 Welding torch 13.............................................................
11 FAULT CODES 13.....................................................
11.1 List of fault codes 13..........................................................
11.2 Fault code descriptions 13.....................................................
12 FAULT--TRACING 14..................................................
13 ORDERING SPARE PARTS 14..........................................
DIAGRAM 16............................................................
SPARE PARTS LIST 19...................................................
ACCESSORIES 26.......................................................

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1DIRECTIVE
Murex Welding Products Ltd, EN8 7TF England, gives its unreserved guarantee that welding power
source Transarc 250 from serial number 819 (2008 w.19) are constructed and tested in compliance
with the standard EN 60974--1 and EN 60974--10 (Class A) in accordance with the requirements of
directive (2006/95/EC) and (2004/108/EEC).
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Kent Eimbrodt
Global Director
Equipment and Automation
On behalf of Murex Welding Products
L
td.
Laxå 2008--08--22
Manufactured by ESAB AB, Welding Equipment
SE--695 81 Laxå Sweden
2SAFETY
Users of welding 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 welding 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 welding
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 welding equipment must be familiar with:
Sits operation
Slocation of emergency stops
Sits function
Srelevant safety precautions
Swelding
2. The operator must ensure that:
Sno unauthorized person is stationed within the working area of the equipment when it is
started up.
Sno--one is unprotected when the arc is struck
3. The workplace must:
Sbe suitable for the purpose
Sbe free from drafts
4. Personal safety equipment
SAlways wear recommended personal safety equipment, such as safety glasses, flame--proof
clothing, safety gloves.
SDo not wear loose--fitting items, such as scarves, bracelets, rings, etc., which could become
trapped or cause burns.
5. General precautions
SMake sure the return cable is connected securely.
SWork on high voltage equipment may only be carried out by a qualified electrician.
SAppropriate fire extinquishing equipment must be clearly marked and close at hand.
SLubrication and maintenance must not be carried out on the equipment during operation.
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WARNING
Read and understand the instruction manual before installing or operating.
Arc welding and cutting can be injurious to yourself and others. Take precausions when welding.
Ask for your employer’s safety practices which should be based on manufacturers’ hazard data.
ELECTRIC SHOCK - Can kill
SInstall and earth the welding unit in accordance with applicable standards.
SDo not touch live electrical parts or electrodes with bare skin, wet gloves or wet clothing.
SInsulate yourself from earth and the workpiece.
SEnsure your working stance is safe.
FUMES AND GASES - Can be dangerous to health
SKeep your head out of the fumes.
SUse 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.
SProtect your eyes and body. Use the correct welding screen and filter lens and wear protective
clothing.
SProtect bystanders with suitable screens or curtains.
FIRE HAZARD
SSparks (spatter) can cause fire. Make sure therefore that there are no inflammable materials nearby.
NOISE - Excessive noise can damage hearing
SProtect your ears. Use earmuffs or other hearing protection.
SWarn bystanders of the risk.
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!
Read and understand the instruction manual before
installing or operating.
CAUTION!
This product is solely intended for arc welding.
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 electromagnic
compatibility of class A equipment in those locations, due to conducted
as well as radiated disturbances.
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Do not dispose of electrical equipment together with normal waste!
In observance of European Directive 2002/96/EC on Waste Electrical and Electronic
Equipment and its implementation in accordance with national law, electrical equipment
that has reached the end of its life must be collected separately and returned to an
environmentally compatible recycling facility. As the owner of the equipment, you should
get information on approved collection systems from our local representative.
By applying this European Directive you will improve the environment and human
health!
We can provide you with all necessary welding protection and accessories.
3 INTRODUCTION
The Transarc 250 is a welding current power source intended for use with coated
electrodes (MMA welding) and TIG welding.
Accessories for the product can be found on page 26.
3.1 Equipment
The power source is supplied with:
SInstruction manual
S3 m return cable
S3 m welding cable
4 TECHNICAL DATA
Transarc 250
Mains voltage 400 V ±15%, 3∼50/60 Hz
Mains supply Ssc min 3.3 MVA
Primary current
Imax MMA
Imax TIG
14 A
10 A
No--load power demand when in the
energy--saving mode, 6.5 min. after welding 30 W
Setting data
Current for MMA
Current for TIG
Activ panel
Remote control unit
Hot start
Arc force
Drop welding (hidden function)
4 -- 250 A
3 -- 250 A
OFF or ON
OFF or ON
0--99%
0 -- 99%
OFF or ON
Permissible load at MMA
30 % duty cycle
60 % duty cycle
100% duty cycle
250 A / 30 V
190 A / 27.6 V
150 A / 26 V
Permissible load at TIG
30 % duty cycle
60 % duty cycle
100% duty cycle
250 A / 20 V
190 A / 17.6 V
150 A / 16 V
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Transarc 250
Power factor at maximum current
MMA
TIG
0.94
0.93
Efficiency at maximum current
MMA
TIG
83 %
79 %
Open--circuit voltage
without VRD
with VRD
65 V
<35V
Operating temperature -- 1 0 t o + 4 0 ˚C
Transportation temperature -- 2 0 t o + 5 5 ˚C
Continual sound pressure at no--load <70db(A)
Dimensions lxwxh 418 x 188 x 208 mm
Weight 10.5 kg
Insulation class transformer H
Enclosure class IP 23
Application class
Mains supply, Ssc min
Minimum short circuit power on the network in accordance with IEC 61000--3--12
Duty cycle
The duty cycle refers to the time as a percentage of a ten--minute period that you can weld at a cer-
tain load without overloading. The duty cycle is valid for 40˚C.
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 designed for indoor and outdoor use.
Application class
The symbol indicates that the power source is designed for use in areas with increased
electrical hazard.
5 INSTALLATION
The installation must be executed by a professional.
5.1 Location
Place the power source so that its cooling air inlets and outlets are not obstructed.
5.2 Mains supply
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). 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.
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5.3 Mains power supply
Make sure that the welding power source is connected to the correct supply voltage
and that it is protected by the correct fuse rating. A protective earth connection must
be made in accordance with regulations.
Rating plate with supply connection data
5.3.1 Recommended fuse sizes and minimum cable area
Transarc 250
Mains voltage 400V
Mains cable area mm24G1.5
Phase current I1eff 8A
Fuse
anti--surge
type C MCB
10 A
10 A
NOTE!
The cable area and fuse rating above comply with Swedish regulations. Use the welding power source
in accordance with the relevant national regulations.
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6 OPERATION
General safety regulations for the handling of the equipment can be found on
page 3. Read through before you start using the equipment!
6.1 Connections and control devices
1Mains voltage switch 4Connection for remote control unit
2Connection (+)
TIG: return cable
MMA: welding cable or return cable
5Control panel, see title 7.
3Connection (--)
TIG: torch
MMA: return cable or welding cable
6.2 Connection of welding and return cable
The power source has two outputs, a positive terminal (+) and a negative terminal
(--), for connecting welding and return cables. The output to which the welding cable
is connected depends on the type of electrode used. The connecting polarity is
stated on the electrode packaging.
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.
6.3 Overheating protection
The welding power source has overheating protection that operates if the
temperature becomes too high. When this occurs the welding current is interrupted
and a fault code is displayed on the control panel.
The overheating protection resets automatically when the temperature has fallen.
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7 CONTROL PANEL
When mains power is supplied the unit runs a self diagnosis of the
LEDs and the display, the program version is displayed and in this
example the program version is 0.18.
Display
Indication of which parameter is
shown in the display
(current, voltage or percent)
Choice of current indication (A)
or voltage indication (V) during
welding, in the display
Knob for setting data (current or percent)
Buttons for settings in welding data memory. See title 7.1 .
Button for choosing parameters ”Hot start” or arc pressure ”Arc force”
when MMA welding
Choice of welding method MMA or TIG
Choice of electrode type ”Basic”, ”Rutile” or ”Cellulose” when MMA welding
Setting from panel and connecting remote control unit
Display of VRD function (reduced open--circuit voltage).
7.1 Welding data memory
Two different welding data programs can be stored in the control panel memory.
Press button or for 5 seconds to store the welding data in the
memory. The welding data is stored when the green indicator lamp starts to flash.
To switch between the different welding data memories press button or
.
The welding data memory has a back--up so that the settings remain even if the
machine has been switched off.
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8 MMA WELDING
8.1 Symbol and function explantions
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.
Setting current
A higher current produces a wider weld pool, with better penetration into the
workpiece.
Active panel
Settings are made from the control panel.
Remote control unit
Settings are made from the remote control unit.
The remote control unit must be connected to the remote control unit socket on the
machine before activation. When the remote control unit is activated the panel is
inactive.
Hot Start
Increases the welding current during a fixed time at the start of the welding process.
Set the value of the hot start current by using the knob. This reduces the risk of
incomplete fusion at the start of the weld.
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.
VRD (Voltage Reduction Device)
Note! The VRD function is not active (LED has gone out) on delivery. Contact an
authorised ESAB service technician to activate the function.
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 deactivated when the system senses that welding has started.
If the VRD function is activated and open--circuit voltage exceeds the 35 V limit, this
is indicated by an error message (16) appearing in the display and welding cannot
be started whilst the error message is displayed.
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