Publicité
Hazards from
mains and weld-
ing current
(continued)
Stray welding
currents
ud_fr_st_sv_00467
022013
Do not loop any cables or other leads around your body or any part of your
body.
Never immerse the welding electrode (rod electrode, tungsten electrode,
welding wire, ...) in liquid in order to cool it, and never touch it when the
power source is ON.
Twice the open-circuit voltage of one single welding machine may occur
between the welding electrodes of two welding machines. Touching the
potentials of both electrodes simultaneously may be fatal.
Have the mains and the machine supply leads checked regularly by a
qualified electrician to ensure that the PE (protective earth) conductor is
functioning correctly.
Only run the machine on a mains network with a PE conductor, and plugged
into a power outlet socket with a protective-conductor contact.
If the machine is run on a mains network without a PE conductor and
plugged into a power outlet socket without a protective-conductor contact,
this counts as gross negligence and the manufacturer shall not be liable for
any resulting damage.
Wherever necessary, use suitable measures to ensure that the workpiece is
sufficiently grounded (earthed).
Switch off any appliances that are not in use.
Wear a safety harness if working at height.
Before doing any work on the machine, switch it off and unplug it from the
mains.
Put up a clearly legible and easy-to-understand warning sign to stop
anybody inadvertently plugging the machine back into the mains and
switching it back on again.
After opening up the machine:
-
discharge any components that may be storing an electrical charge
-
ensure that all machine components are electrically dead.
If work needs to be performed on any live parts, there must be a second
person on hand to immediately switch off the machine at the main switch in
an emergency.
If the following instructions are ignored, stray welding currents may occur.
These can cause:
-
fires
-
overheating of components that are connected to the workpiece
-
destruction of PE conductors
-
damage to the machine and other electrical equipment
Ensure that the workpiece clamp is tightly connected to the workpiece.
Attach the workpiece clamp as close as possible to the area to be welded.
On electrically conductive floors, the machine must be set up in such a way
that it is sufficiently insulated from the floor.
VI
Publicité
