Meandering Welding Currents; Emc Device Classifications; Emc Measures - Fronius TransSteel 3500 Syn Operating Instructions Manual

If work on live parts is required, appoint a second person to switch off the main
switch at the right moment.
Meandering If the following instructions are ignored, meandering welding currents can devel-
welding currents op with the following consequences:
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Ensure that the workpiece is held securely by the workpiece clamp.
Attach the workpiece clamp as close as possible to the area that is to be welded.
Position the device with sufficient insulation against electrically conductive envir-
onments, such as insulation against conductive floor or insulation to conductive
racks.
If power distribution boards, twin-head mounts, etc., are being used, note the fol-
lowing: The electrode of the welding torch / electrode holder that is not used is
also live. Make sure that the welding torch / electrode holder that is not used is
kept sufficiently insulated.
In the case of automated MIG/MAG applications, ensure that only an insulated
wire electrode is routed from the welding wire drum, large wirefeeder spool or
wirespool to the wirefeeder.
EMC Device Devices in emission class A:
Classifications -
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Devices in emission class B:
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EMC device classification as per the rating plate or technical data.

EMC measures

In certain cases, even though a device complies with the standard limit values for
emissions, it may affect the application area for which it was designed (e.g. when
there is sensitive equipment at the same location, or if the site where the device
is installed is close to either radio or television receivers).
If this is the case, then the operator is obliged to take appropriate action to recti-
fy the situation.
Check and evaluate the immunity to interference of nearby devices according to
national and international regulations. Examples of equipment that may be sus-
ceptible to interference from the device include:
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Supporting measures for avoidance of EMC problems:
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Fire hazard
Overheating of parts connected to the workpiece
Damage to ground conductors
Damage to device and other electrical equipment
Are only designed for use in industrial settings
Can cause line-bound and radiated interference in other areas
Satisfy the emissions criteria for residential and industrial areas. This is also
true for residential areas in which the energy is supplied from the public low-
voltage mains.
Safety devices
Network, signal and data transfer lines
IT and telecommunications devices
Measuring and calibrating devices
Mains supply
- If electromagnetic interference arises despite the correct mains connec-
tion, additional measures are necessary (e.g. use of a suitable line filter)