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Sous réserve de modifications sans avis préalable.
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Reservado el derecho de cambiar las especificaciones sin previo aviso.
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Reservamo--nos o direito de alterar as especificações sem aviso prévio.
SPARE PARTS LIST82...................................................
TOCe
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1DIRECTIVE
DECLARATION OF CONFORMITY
Esab Welding Equipment AB, 695 81 Laxå, Sweden, gives its unreserved guarantee
that welding power source LHN 250 from serial number 747 complies with standard
EN 60974--1, in accordance with the requirements of directive (73/23/EEA) and addendum (93/68/EEA), and standard EN 50199 in accordance with the requirements
of directive (89/336/EEA) and addendum (93/68/EEA).
Paul Karlsson
Managing Director
Esab Welding Equipment AB
695 81 LAXÅ
SWEDENTel: + 46 584 81000Fax: + 46 584 12336
2SAFETY
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
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 keep fumes and gases 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 ear defenders or other hearing protection.
SWarn bystanders of the risk.
MALFUNCTION -- Call for expert assistance in the event of malfunction.
READ AND UNDERSTAND THE INSTRUCTION MANUAL BEFORE INSTALLING OR OPERATING.
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PROTECT YOURSELF AND OTHERS!
-- 2 8 --
3INTRODUCTION
Note!
This product is solely intended for arc welding.
The LHN 250 are one transistor controlled welding power source designed for
welding with coated electrodes and for TIG welding (touch start).
The advanced electronics provide rapid control response, low power demand and
excellent welding characteristics. Inverter technology contributes to low weight and
compact dimensions of the units.
The rounded slimline shape of the unit makes it comfortable to carry. The strap can
be folded to serve as a carrying handle, or fully extended to serve as a shoulder
strap.
3.1Technical data
Performance:
at 35% duty cycle
at 60% duty cycle
at 100% duty cycle
Setting rangecontinuously variable 4--250 A
250 A/30 V
180 A/27 V
140 A/26 V
Open circuit voltage50--80 V
Mains supply:
voltage
frequency
fuse
mains cable, area
Enclosure classIP 23
Application class
Dimensions L x W x H472x142x256
Weight11 kg
*When welding below 100 A a 10 A slow fuse is adequate..
**Power cable ratings complies with Swedish regulations..
Duty cycle
The duty cycle refers to the time in per cent of a ten--minute period that you can weld
at a certain load without overloading the welding power source.
Enclosure class
400 V AC
50/60 Hz
16 A*
3x1,5 mm2**
The IP code indicates the enclosure class, i. e. the degree of protection against
penetration by solid objects or water. Equipment marked IP 23 is designed for indoor
and outdoor use.
Application class
The symbolindicates that the power source is designed for use in areas where
there is an increased electrical hazard.
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3.2Equipment
LHN 250 is equipped with a remote control socket which activates automatically
when a remote control device is connected. NOTE! The contact pins L and M m ust
be strapped in the remote device’s connection cable for automatic activation to
function.Theinverterissuppliedwitha3meterlongmainscable.
LHN 250 is delivered with 5 meter long welding and return cables. T hese are
attached to cable connectors allowing quick change of polarity.
The manufacturer’s serial number is stamped on the rating plate.
3.3Field of application
LHN 250 supply direct current, which allows you to weld most alloyed and
non--alloyed steels, stainless steels and cast iron.
With the LHN 250 you can use coated electrodes from1.6 to5 mm.
Tig-- welding
TIG welding is particularly useful when high quality standards are required and when
welding thin sheet.
Before using the LHN 250 for TIG welding it must be equipped with a TIG torch and
gas valve, a cylinder of argon, an argon regulator, tungsten electrodes and, if
necessary, suitable filler metal.
The best method to use is the touch start, where you gently stroke the tungsten
electrode against the workpiece to establish the arc.
4INSTALLATION
WARNING
This product is intended for repair and maintenance welding
In domestic or office environment this product may cause radio interference.
It is the responsibility of the user to take adequate precautions.
4.1Placing
Place the machine so that there is nothing to prevent the cooling air from passing
through it.
4.2Connection
To get maximum performance from the LHN 250 it must be fitted with a 16A slow
fuse.
The LHN 250 have mains voltage compensation, which m eans that ¦10%
fluctuation in the supply voltage produces only ¦0.2% variation in the welding
voltage.
LHN 250 is intended for 400V, 3 phase supplies. It can be used with 50 Hz or
60 Hz supplies.
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5OPERATION
5.1Start--up
The power switch is at the rear of the LHN 250. The white lamp on the front will glow
when the power is on.
1.Yellow lamp
2.Welding current control 4--250 A
3.White lamp
4.Remote control socket
The current is adjusted using the knob on the front.
Important!
Only use the accompanying welding cab le and return cable, with a
cross--sectional area of 35 mm@.
(See list of spare parts for order number).
bh11d001
5.2Overload protection
To save you worrying about overloading the LHN 250 it has a thermal cut--out that
will trip before the temperature becomes too high. You can tell when the rectifier has
been overloaded because the yellow light comes on and it will no longer be possible
to weld.
6MAINTENANCE
6.1Cleaning
Normally it is sufficient to blow the welding power source clean regularly using dry
compressed air (reduced pressure), and to clean the filter in the front regularly.
In dusty and dirty environment the welding power source should be cleaned at
shorter intervals.
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7F AULT TRACING
7.1Possible faults and measures to take
Type of faultMeasure
No arc is generated by the welding power
source.
The welding current is interrupted in the course
of welding.
The thermal cut--out trips frequently.SCheck that the filter is not packed with dust.
Poor welding result.SCheck that the welding and return cables
SMake sure the mains switch is on.
SCheck that the welding and return cables
are properly connected.
SMake sure the welding current set is correct.
SCheck if the thermal cut--out has tripped (the
orange indicating lamp on the front panel is
on).
SCheck the mains fuse.
SCheck that the ratings of the welding power
source have not been exceeded (overload
of the power source).
are properly connected.
SMake sure the welding current set is correct.
SCheck that there is nothing wrong with the
electrodes.
8ORDERING OF SPARE PARTS
When ordering a spare part, please state the type and serial number of the m achine
as well as number of the spare part, according to the spare parts list.
This will simplify dispatch and ensure you get the right part.
9EXTRA ACCESSORIES
Remote control devicePHA125 m0367 657 880
Remote control devicePHA110 m0367 657 881
Remote control devicePHA2Hotstart0367 601 880
Remote control devicePHB10367 317 880
Remote control devicePHB20367 318 880
Remote control devicePHC20367 620 880
Remote control devicePHA50367 970 880
Connecting cable5 m0367 144 881
Connecting cable10 m0367 144 882
Connecting cable1.5 m0367 144 883
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