2
Work safety
Page 16
Stud welding unit
operating manual
Date:
July 2021
ALPHA 850
07.2021 / EN
Rev.:
A
Safety measures during elevated electrical hazard:
There is an elevated electrical hazard especially during work:
−
in tight spaces with electrically conductive walls,
−
in wet, moist or extremely dry and hot spaces,
−
with limited freedom of movement on electrically conductive parts (metallic
cables, grates, support rails, bottom plates, etc.),
−
under narrow conditions between or on electrically conductive parts.
Under these work conditions, the following safety measures must be taken:
The welder must be adequately protected against electrical hazards through use of
insulating pads or intermediate layers.
The insulating material must be attached such that conductive parts, moist walls
and moist floors cannot be touched.
If it is not possible to use insulating materials due to additional hazards (falling
hazard, special spacial conditions, etc.), work must be done at least in dry,
undamaged work clothing.
Safety features of the ALPHA 850 welding device
The ALPHA 850 welding device bears the “S” symbol and is suitable for
“welding in tight spaces and under elevated electrical hazards” (for more
details, see DGUV Information 209-010).
•
The peak value of open-circuit voltage is less than 113 V.
For protection against direct and indirect touching, the welding device must be
equipped with the following safety measures:
•
Protection class IP 23:
Protection against penetration by foreign bodies (Ø ≥
12 mm).
Protection against dripping water, slanted to 60° from
horizontal.
•
Protection class I: Device with basic insulation and connection of all touchable,
conductive parts to the earth conductor.
