72
GB/MT
the event a fault can be provided
by using a fault-circuit interrupter,
which is operated with a leakage
current of no more than 30 mA
and covers all mains-powered
devices in close proximity. The
fault-circuit interrupter must be
suitable for all types of current.
There must be means of rapid
electrical isolation of the welding
power source or the welding cir-
cuit (e.g. emergency stop device)
which are easily accessible.
When using welding devices
under electrically dangerous
conditions, the output voltage
of the welding device must be
greater than 113 volt when idling
(peak value). Based on the output
voltage this welding device may
be used in these conditions.
z
Welding in tight spaces
When welding in tight spaces
this may pose a hazard through
toxic gases (risk of suffocation).
In tight spaces you may only
weld if there are trained individu-
als in the immediate vicinity who
can intervene if necessary. In this
case, before starting the welding
procedure, an expert must carry
out an assessment in order to
determine what steps are neces-
sary, in order to guarantee safety
at work and which precautionary
measures should be taken during
the actual welding procedure.
z
Total of open circuit
voltages
When more than one welding
power source is operated at the
same time, their open circuit
voltages may add up and lead to
an increased electrical hazard.
Welding power sources must
be connected in such a way
that the danger is minimised.
The individual welding power
sources, with their individual con-
trol units and connections, must
be clearly marked, in order to
be able to identify which device
belongs to which welding power
circuit.
z
Using shoulder straps
Welding must not take place
if the welding power source is
being carried e.g. with a shoul-
der strap.
This is intended to prevent:
The risk of losing your balance
if the lines or hoses which are
connected are pulled
Safety instructions
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