Meandering Welding Currents - Fronius MagicWave 190 Operating Instructions Manual

Make sure that you and others are protected with an adequately insulated, dry temporary
backing or cover for the earth or ground potential. This temporary backing or cover must
extend over the entire area between the body and the earth or ground potential.
All cables and leads must be secured, undamaged, insulated and adequately dimen-
sioned. Replace loose connections and scorched, damaged or inadequately dimensioned
cables and leads immediately.
Use the handle to ensure the power connections are tight before every use.
In the case of power cables with a bayonet connector, rotate the power cable around the
longitudinal axis by at least 180° and pre-load.
Do not wrap cables or leads around the body or parts of the body.
The electrode (rod electrode, tungsten electrode, welding wire, etc.) must
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Double the open circuit voltage of a power source can occur between the welding elec-
trodes of two power sources. Touching the potentials of both electrodes 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.
The device must only be operated on a mains supply with a ground conductor and a socket
with a ground conductor contact.
Operating the device on a grid without a ground conductor and in a socket without a ground
conductor contact will be deemed gross negligence. The manufacturer shall not be held
liable for any damage arising from such usage.
If necessary, provide an adequate earth connection 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 any-
one 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, appoint a second person to switch off the main switch at
the right moment.
Meandering weld- If the following instructions are ignored, meandering welding currents can develop with the
ing currents 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.
If the floor is electrically conductive, the device must be set up with sufficient insulating ma-
terial to insulate it from the floor.
never be immersed in liquid for cooling
Never touch the electrode when the power source 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
Irreparable damage to ground conductors
Damage to device and other electrical equipment
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