20
For welding power sources with multiple connection,
observe the corresponding wiring on the main and control
transformer (400 V / 480 V / etc.).
Although the power source is "marked S" for welding in
environments with increased electrical hazard, the power
source itself must not be installed in such places (mains
voltage 400V).
Only the welding torch and wire drive unit may be installed
and operated in such places.
Depending on the process used, it may happen that there is
an addition of the two open circuit voltages between the
welding electrodes of two power sources. There is possibly
the risk of danger to life if both potentials are touched at the
same time, see Figure 3.
CAUTION!
Figure 1. Mains voltage main transformer Figure 2. Mains voltage control transformer
ATTENTION!
Figure 3. Added open circuit voltages
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