Fronius TransPocket 1500 RC HD Instructions De Service page 34

Hazards from
mains and weld-
ing current
(continued)
Vagrant welding
currents
EMC precautions
ud_fr_st_sv_00467 022002
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.
When working at great heights, wear a safety harness.
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, vagrant 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.
It is the responsibility of the owner/operator to ensure that no
electromagnetic interference is caused to electrical and electronic
equipment.
If electromagnetic interference is found to be occurring, the owner/operator
is obliged to take all necessary measures to prevent this interference.
Examine and evaluate any possible electromagnetic problems that may
occur on equipment in the vicinity, and the degree of immunity of this
equipment, in accordance with national and international regulations:
- safety features
- mains, signal and data-transmission leads
- IT and telecoms equipment
- measurement and calibration devices
- the health of persons in the vicinity, e.g. users of heart pacemakers and
hearing aids
VI