ESAB CIGWELD WeldSkill 205AC/DC, Operating Manual

Page: 24 / 72

INSTALLATION 3-2 0-5555
!
WARNING
It is also possible that operation
close to computer installations may
cause computer malfunction.
3.06 High Frequency Interference
Interference may be transmitted by a high frequency
initiated or stabilised arc welding machine in the fol-
lowing ways.
1. Direct Radiation: Radiation from the machine can
occur if the case is metal and is not properly grounded.
It can occur through apertures such as open access
panels. The shielding of the high frequency unit in
the Power Source will prevent direct radiation if the
equipment is properly grounded.
2. Transmission via the Supply Lead: Without ad-
equate shielding and filtering, high frequency energy
may be fed to the wiring within the installation (mains)
by direct coupling. The energy is then transmitted by
both radiation and conduction. Adequate shielding
and filtering is provided in the Power Source.
3. Radiation from Welding Leads: Radiated interfer-
ence from welding leads, although pronounced in the
vicinity of the leads, diminishes rapidly with distance.
Keeping leads as short as possible will minimise this
type of interference. Looping and suspending of leads
should be avoided wherever possible.
4. Re-Radiation from Unearthed Metallic Objects:
A major factor contributing to interference is re-
radiation from unearthed metallic objects close to the
welding leads. Effective grounding of such objects will
prevent re-radiation in most cases.
3.07 Generators
Refer to Note 4 on page 2-6 for recommendations
when using with a Generator.
3.08 Extension Leads
If an extension lead is required to be used it is recom-
mended to use a minimum size of 2.5mm2 Heavy Duty
Extension Lead. Longer extension leads may impact
welding performance and operation.
3.09 Short Circuit Protection While
Welding
To prolong the useful life of a TIG tungsten elec-
trode, the WeldSkill 205 AC/DC incorporates special
circuitry.
In AC and DC HF TIG mode, if the tungsten elec-
trode touches the work the welding current is
reduced to 60 Amps within 1 second.
In STICK mode, if the electrode touches the work
for more than two seconds the welding current is
reduced to 15 Amps.
3.10 Electromagnetic Compatibility
!
WARNING
Extra precautions for Electromagnetic
Compatibility may be required when
this Welding Power Source is used in
a domestic situation.
A. Installation and Use - Users Responsibility
The user is responsible for installing and using the
welding equipment according to the manufacturer’s
instructions. If electromagnetic disturbances are
detected then it shall be the responsibility of the user
of the welding equipment to resolve the situation
with the technical assistance of the manufacturer. In
some cases this remedial action may be as simple as
earthing the welding circuit, see NOTE below. In other
cases it could involve constructing an electromagnetic
screen enclosing the Welding Power Source and the
work, complete with associated input filters. In all
cases, electromagnetic disturbances shall be reduced
to the point where they are no longer troublesome.
NOTE!
The welding circuit may or may not
be earthed for safety reasons. Chang-
ing the earthing arrangements should
only be authorised by a person who
is competent to assess whether the
changes will increase the risk of
injury, e.g. by allowing parallel weld-
ing current return paths which may
damage the earth circuits of other
equipment. Further guidance is given
in IEC 974-13 Arc Welding Equip-
ment - Installation and use (under
preparation).