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Sources of danger during arc welding
Arc welding results in a number of sources of danger.
It is therefore particularly important for the welder to
comply with the following rules so as not to place him-
self or others in danger and to avoid endangering peo-
ple and equipment.
• Have all work on the mains voltage system, for ex-
ample on cables, plugs, sockets, etc., performed
only by trained electricians. This particularly applies
to configuring intermediate cables.
• If an accident occurs, disconnect the welding power
source from the mains immediately.
• If electric touch voltages occur, switch off the weld-
ing set immediately and have it checked by an ex-
pert.
• Always check for good electrical contacts on the
welding current side.
• Wear insulating gloves on both hands for welding.
These offer protection from electric shocks (idling
voltage in the welding circuit), harmful radiation
(Heat and UV radiation) and from glowing metal and
slag spatter.
• Wear firm, insulated footwear. Your shoes should
also protect you in wet conditions. Opentoed foot-
wear is not suitable since falling droplets of glowing
metal will cause burns.
• Wear suitable clothing, do not wear synthetic
clothes.
• Do not look into the arc with unprotected eyes, use
only a welding safety shield with the proper safety
glass in compliance with DIN standards. In addition
to light and heat, which may cause dazzling and
burns, the arc also gives off UV radiation.
Without proper protection, this invisible ultraviolet
radiation causes very painful conjunctivitis, which
will only be noticeable several hours later. In addi-
tion, UV radiation will cause sunburn-type symp-
toms on unprotected parts of the body.
• Personnel or assistants in the vicinity of the arc must
also be notified of the dangers and provided with the
required protection; if necessary install safety walls.
• Ensure adequate ventilation for welding, particularly
in small rooms since the process causes smoke and
harmful gases.
• Do not carry out any welding work on tanks that have
been used to store gases, fuels, mineral oil or the
like, even if they have been empty for a lengthy pe-
riod of time, since any residue will result in a danger
of explosion.
24 | GB
• Special regulations apply in areas where there is a
potential risk of fire and/or explosion.
• Welds that are exposed to large stresses and must
comply with safety requirements may only be com-
pleted by specially trained and approved welders.
Examples of such welds include pressure vessels,
rails, trailer hitches, etc.
• Arc beams can damage your eyes and injure your
skin. Wear a helmet and safety goggles.
• Wear hearing protection and high, closed shirt col-
lars.
• Wear welding safety helmets and make sure you use
the appropriate filter settings.
• Wear complete body protection.
m ATTENTION:
• It must be noted that the protective conductor in
electrical systems of appliances may be destroyed
by the welding current in the event of negligence,
for example if the earth terminal is placed on the
welding set casing to which the protective conductor
of the electrical system is connected. The welding
work is completed on a machine with a protective
conductor connection. It is therefore possible to
weld on the machine without having connected the
earth terminal to it. In this case the welding current
will flow from the earth terminal through the protec-
tive conductor to the machine. The high welding
current may cause the protective conductor to melt.
• The fuses on the supply cables to the mains sock-
ets must comply with the relevant regulations. To
comply with these regulations, only fuses or circuit
breakers suitable for the cross-section of the cables
may be used.
The use of too high a fuse may result in the cable
burning and fire damage to the building.
• Do not use the welding device in the rain.
• Do not use the welding device in a humid environ-
ment.
• Only set up the welding device on a flat surface.
• The output is rated at an ambient temperature of
20°C. The welding time may be reduced at higher
temperatures.
Danger due to electric shock
Electric shock from a welding electrode can be fatal.
Do not weld in rain or snow. Wear dry insulating gloves.
Do not touch the electrode with bare hands. Do not
wear wet or damaged gloves. Protect yourself from
electric shock by insulating against the workpiece. Do
not open the housing of the device.
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