Transmig 300C
Transmig 350C
Instruction manual
Valid for serial no. 439, 4380349 301 098 050615
DECLARATION OF CONFORMITY
Murex Welding Products Ltd.
Declare hereby that:
Murex Transmig 300C/350C
Part No. 0349 307 690, 0349 307 660
Manufactured after 1st May 2005
S conform with the requirements of Council Directive 72/23/EEC, amended by
Council Directive 93/68/EEC, relating to electrical equipment designed for use
within certain voltage limits.
S conform with the requirements of Council Directive 89/336/EEC, amended by
Council Directive 93/68/EEC, relating to electromagnetic compatibility.
S are manufactured in accordance with EN60974-1 Safety Requirements for Arc
Welding Equipment.
S are manufactured in accordance with EN50199 Electromagnetic Compatibility for
Arc Welding Equipment.
On behalf of oMurex Welding Products Ltd.
HanoverHouse, Queensgate
Britannia Road, Waltham Cross
Herts. EN8 7TF
England
Manufactured by Esab Welding Equipment AB.
Henry Selenius
Vice President
ESAB Welding Equipment AB
695 81 LAXA
SWEDEN
declaration
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ENGLISH
1 SAFETY 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 INTRODUCTION 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1 Equipment 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 TECHNICAL DATA 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1 Transmig 300C 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 Transmig 350C 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 INSTALLATION 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1 Placing 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2 Assembly of components 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3 Electrical installation 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4 Mains power supply 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5 OPERATION 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1 Connection and control devices 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2 Function explanation 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6 MAINTENANCE 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.1 Inspection and cleaning 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7 FAULT TRACING 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DIAGRAM 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
WEAR COMPONENTS 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ACCESSORIES 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TOCe
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1 SAFETY
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:
S its operation
S location of emergency stops
S its function
S relevant safety precautions
S welding
2. The operator must ensure that:
S no unauthorised person is stationed within the working area of the equipment when it is
started up.
S no−one is unprotected when the arc is struck
3. The workplace must:
S be suitable for the purpose
S be free from draughts
4. Personal safety equipment
S Always wear recommended personal safety equipment, such as safety glasses, flame−proof
clothing, safety gloves.
S Do not wear loose−fitting items, such as scarves, bracelets, rings, etc., which could become
trapped or cause burns.
5. General precautions
S Make sure the return cable is connected securely.
S Work on high voltage equipment may only be carried out by a qualified electrician.
S Appropriate fire extinquishing equipment must be clearly marked and close at hand.
S Lubrication and maintenance must not be carried out on the equipment during operation.
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WARNING
ARC WELDING AND CUTTING CAN BE INJURIOUS TO YOURSELF AND OTHERS. TAKE PRECAUTIONS WHEN WELDING. ASK FOR YOUR EMPLOYER’S SAFETY PRACTICES WHICH SHOULD BE
BASED ON MANUFACTURERS’ HAZARD DATA.
ELECTRIC SHOCK − Can kill
S Install and earth the welding unit in accordance with applicable standards.
S Do not touch live electrical parts or electrodes with bare skin, wet gloves or wet clothing.
S Insulate yourself from earth and the workpiece.
S Ensure your working stance is safe.
FUMES AND GASES − Can be dangerous to health
S Keep your head out of the fumes.
S 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.
S Protect your eyes and body. Use the correct welding screen and filter lens and wear protective
clothing.
S Protect bystanders with suitable screens or curtains.
FIRE HAZARD
S Sparks (spatter) can cause fire. Make sure therefore that there are no inflammable materials nearby.
NOISE − Excessive noise can damage hearing
S Protect your ears. Use earmuffs or other hearing protection.
S 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!
WARNING!
Read and understand the instruction manual
before installing or operating.
WARNING!
Do not use the power source for thawing frozen pipes.
This product is solely intended for arc welding.
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2 INTRODUCTION
Transmig 300C & Transmig 350C are step controlled power sources in a compact
design, intended for welding with solid steel, stainless steel or aluminium wire as well
as tubular wire with or without shielding gas.
The possibility of welding with homogeneous wire/shielding gas and welding with
gasless tubular wire is obtained by switching the + and − connections on the
switching terminal above the wire feed unit.
2.1 Equipment
Both power sources are supplied with:
S Return cable 3,5m with return clamp
S Shelf for gas cylinder
S Instruction manual
3 TECHNICAL DATA
3.1 Transmig 300C
Voltage 400−415 V, 3∼ 50/60 Hz
Permissible load at
100% duty cycle 150 A/22 V
60 % duty cycle 190 A/24 V
30 % duty cycle 280 A/28 V
Setting range (DC) 30A/15V−280A/28V
Open circuit voltage 15−38 V
Open circuit power 190 W
Efficiency 69%
Power factor 0.97
Control voltage 42 V, 50/60 Hz
Wire feed speed 1,9 − 19m/min
Burnback time 0 − 0,25s
Spot welding 0,2 − 2,5s
Welding gun connection EURO
Dimensions lxwxh 840x425x830
Weight 91 kg
Operating temperature −10 to +40oC
Enclosure class IP 23
Application classification
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3.2 Transmig 350C
Voltage 400−415 V, 3∼ 50/60 Hz
Permissible load at
100% duty cycle 195 A/24 V
60 % duty cycle 250 A/27 V
30 % duty cycle 340 A/31 V
Setting range (DC) 40A/16V−340A/31V
Open circuit voltage 16−40 V
Open circuit power 240 W
Efficiency 77%
Power factor 0.95
Control voltage 42 V, 50/60 Hz
Wire feed speed 1,9 − 20m/min
Burnback time 0 − 0,5s
Creep start OFF / ON
2/4 stroke 2 / 4
Welding gun connection EURO
Dimensions lxwxh 840x425x830
Weight 114 kg
Operating temperature −10 to +40oC
Enclosure class IP 23
Application classification
Duty cycle
The duty cycle refers to the time as a percentage of a ten−minute period that you can weld at a certain load without overloading.
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.
4 INSTALLATION
The installation must be executed by a professional.
WARNING!
This product is intended for industrial use. In a domestic environment this product may cause radio
interference. It is the user’s responsibility to take adequate precautions.
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4.1 Placing
Position the welding power source such way that its cooling air inlets and outlets are
not obstructed.
4.2 Assembly of components
WARNING!
During transport, the rear wheels of the power source are in their forward position.
Before use, place the wheels in their rear position.
4.3 Electrical installation
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4.4 Mains power supply
Check that the unit is connected to the correct mains power supply voltage, and that
it is protected by the correct fuse size. A protective earth connection must be made,
in accordance with regulations.
Rating plate with supply connection data
Transmig 300C 3∼ 50/60 Hz Transmig 350C 3∼ 50/60 Hz
Voltage V 400/415 Voltage V 400/415
Current A
at 100% duty cycle 7
at 60% duty cycle 10 at 60% duty cycle 14
at 30% duty cycle 18 at 30% duty cycle 21
Cable area mm
Fuse slow A 16 Fuse slow A 16
2
4 x 1.5 Cable area mm
Current A
at 100% duty cycle 9
2
4 x 2.5
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5 OPERATION
General safety regulations for the handling of the equipment can be found on
page 4. Read through before you start using the equipment!
WARNING!
Rotating parts can cause injury, take great care.
WARNING − TIPPING RISK!
There is a risk of tipping while transportation and operation, if the welding machine leans
more than 10o. In that case appropriate securing has to be provided !
5.1 Connection and control devices
1 Mains supply switch 8 Connection for return cable (−), low induc-
tance
2 Switch, coarse control 9 Knob for selecting − creep start − ON/OFF
3 Switch, precise control 10 Knob for wire speed setting
4 Indicating lamp, power supply ON 11 Knob for selecting 2/4−stroke control mode
5 Orange indicating lamp, overheating 12 Knob for burn−back time setting
6 EURO − connector (for welding gun) 13 Digital instrument − V / A
(option,see page 18)
7 Connection for return cable (−), high induc-
tance
14 Knob for spot welding − ON/OFF and time
setting
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5.2 Function explanation
5.2.1 Overheating protection
A thermal overload cutout protects against overheating. The cutout resets automatically
when the unit has cooled.
5.2.2 Inductance connection
Higher inductance produces a more flowing weld and fewer spatters. Lower inductance
produces a harsher sound and a stable, concentrated arc.
6 MAINTENANCE
Regular maintenance is important for safe, reliable operation.
Note!
All guarantee undertakings from the supplier cease to apply if the customer himself
attempts any work in the product during the guarantee period in order to rectify any
faults.
6.1 Inspection and cleaning
Check regularly that the power source is free from dirt.
The power source should be regularly blown clean using dry compressed air at reduced
pressure. More frequently in dirty environments.
Otherwise the air inlet/outlet may become blocked and cause overheating. To avoid
this you can use an airfilter.
The airfilter is an accessory. Ordering number can be found on page 18.
Welding gun
S Cleaning and replacement of the welding gun’s wear parts should take place at
regular intervals in order to achieve trouble−free wire feed. Blow the wire guide
clean regularly and clean the contact tip.
The brake hub
The hub is adjusted when delivered, if
readjustment is required, follow the instructions
below. Adjust the brake hub so that wire is slightly
slack when wire feed stops.
S Adjusting the braking torque:
S Turn the red handle to the locked position.
S Insert a screwdriver into the springs in the hub.
Turn the springs clockwise to reduce the braking torque
Turn the springs anticlockwise to increase the braking torque. NB: Turn both
springs through the same amount.
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7 FAULT TRACING
Try these recommended checks and inspections before sending for an authorised service technican.
Type of fault
No arc S Check that the mains power supply switch is turned on.
S Check that the welding current supply and return cables are
correctly connected.
S Check that correct current value is set.
Welding current is interrupted
during welding
Thermal overload trips
operate frequently
Poor welding performance S Check that the welding current supply and return cables are
S Check whether the thermal overload trip has operated
(indicated by the orange lamp on the front).
S Check the main power supply fuses.
S Check to see whether the air filters are clogged.
S Make sure that you are not exceeding the rated data for the
power source (i.e. that the unit is not being overloaded).
correctly connected.
S Check that the correct current value is set.
S Check that the correct welding wires are being used.
S Check the main power supply fuses.
S Check the wire feed unit − if proper rolls are applied and
properly set the pressure of the wire feeder’s pressure rollers
Actions
Transmig 300C, Transmig 350C is designed and tested in accordance with the international and European standards IEC/EN 60974−1 and EN 50199. It is the obligation of the
service unit which has carried out the service or repair work to make sure that the product still conforms to the said standard.
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Diagram
Transmig 300C, 400−415V
dT3035C
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Transmig 350C, 400−415V
dT3035C
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Transmig 300C/350C
Valid for serial no. 439, 438−XXX−XXXX
Ordering numbers
0349 307 690 Transmig 300C 400−415V 3~50/60Hz
0349 307 660 Transmig 350C 400−415V 3~50/60Hz
oT3035C
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Edition 050615
Transmig 300C
Wear components
(W. F. Mechanism 0455 890 888)
Item Denomination Ordering no. Notes
A Pressure roller 0455 907 001
0367 556 001
B Feed roller
C Inlet nozzle 0466 074 001
D Insert tube
E Outlet nozzle
The rollers are marked with wire dimension in mm, some are also marked with inch.
0367 556 002
0367 556 006
0367 556 004
0455 894 001
0455 889 001
0455 885 001
0455 886 001
Ø 0.6−0.8mm Fe, Ss, cored wire.
Ø 0.8−1.0mm Fe, Ss, cored wire.
Ø 1.0−1.2mm cored wire.
Ø 1.0−1.2mm Al wire.
Plastic, must be used together with item 0455 885 001,
for welding with Al wire.
Steel, must be used together with item 0455 886 001.
Must be used together with item 0455 894 001,
for welding with Al wire.
Must be used together with item 0455 889 001.
Welding with aluminium wires.
In order to weld with aluminium wires, proper rollers, nozzles and liners for
aluminium wires MUST be used. It is recommended to use 3m long welding gun for
aluminium wires, equipped with appropriate wear parts.
wT300C
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Edition 050615
Transmig 350C
Wear components
(W. F. Mechanism 0455 890 881)
Item Denomination Ordering no. Notes
A Pressure roller
B Feed roller
C Inlet nozzle 0466 074 001
D Insert tube
E Outlet nozzle
The rollers are marked with wire dimension in mm, some are also marked with inch.
0369 728 001
0466 262 001 Knurled
0369 557 001
0369 557 002
0369 557 003
0369 557 004
0369 557 006
0455 894 001
0455 889 001
0455 885 001
0455 886 001
Ø 0.6−0.8mm Fe, Ss, cored wire.
Ø 0.8−1.0mm Fe, Ss, cored wire.
Ø 1.0−1.2mm Fe, Ss, cored wire.
Ø 1.0−1.2mm cored wire, knurled.
Ø 1.0−1.2mm Al wire.
Plastic, must be used together with item 0455 885 001,
for welding with Al wire.
Steel, must be used together with item 0455 886 001.
Must be used together with item 0455 894 001,
for welding with Al wire.
Must be used together with item 0455 889 001.
Welding with aluminium wires.
In order to weld with aluminium wires, proper rollers, nozzles and liners for
aluminium wires MUST be used. It is recommended to use 3m long welding gun for
aluminium wires, equipped with appropriate wear parts.
wT350C
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Edition 050615
Transmig 300C/350C
Accessories
Digital meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0349 308 400
Transformer kit for CO2 heater . . . . . . . . . . . 0349 308 890
Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0349 302 599
Cable holder . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0349 303 362
aT3035C
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Edition 050615
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