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The electrode (rod electrode, tungsten electrode, welding wire, etc.) must
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Double the open circuit voltage of a welding system can occur between the weld-
ing electrodes of two welding systems. Touching the potentials of both elec-
trodes at the same time may be fatal under certain circumstances.
Arrange for the mains cable to be checked regularly by a qualified electrician to
ensure the ground conductor is functioning properly.
Protection class I devices require a mains supply with ground conductor and a
connector system with ground conductor contact for proper operation.
Operation of the device on a mains supply without ground conductor and on a
socket without ground conductor contact is only permitted if all national regula-
tions for protective separation are observed.
Otherwise, this is considered gross negligence. The manufacturer shall not be
held liable for any damage arising from such usage.
If necessary, provide adequate earthing for the workpiece.
Switch off unused devices.
Wear a safety harness if working at height.
Before working on the device, switch it off and pull out the mains plug.
Attach a clearly legible and easy-to-understand warning sign to the device to
prevent anyone from plugging the mains plug back in and switching it on again.
After opening the device:
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If work on live parts is required, have a second person 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.
never be immersed in liquid for cooling
never be touched when the welding system is switched on.
Discharge all live components
Ensure that all components in the device are de-energised.
Fire hazard
Overheating of parts connected to the workpiece
Damage to ground conductors
Damage to device and other electrical equipment
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