3
GLC 353/503/553 MC3
Operating instructions
EN50199
:
1995
Appendix A (information)
Installation and use
The user is responsible for the installation and operation of the welding machine according to the manufacturer's
instructions. If there is electromagnetic interference, the user is responible for finding a solution with the aid of
the manufacturer of the welding machine, e.g. grounding of the weld current circuit, electromagnetic screening
and/or inlet filter.
A.1 Evaluation of the area
Before installing the welding machine, the user has to evaluate any possible electromagnetic problems in the
surrounding area. The following must be taken into consideration:
a)
Other mains supply lines, control lines, signal and telecommunication lines above, below and next
to the welding machine.
b)
Radio and TV broadcasting station and receiver.
c)
Computer and other control units.
d)
Safety devices, e.g. protection for commercial equipment.
e)
Health of persons in vicinity, e.g. if using pacemakers and hearing aids.
f)
Units for calibration or measement.
g)
Resistance to interference of other equipment in the surrounding area. The user must ensure that
other equipment used in the vicinity is electromagnetically compatible. This may require additional
safety measures.
h)
The time of day when welding or other activities are being carried out.
The extent of the surrounding area to be considered depends on the construction of the building and other
activities which take place there and may exceed the boundaries of the property.
A.2 Procedure to reduce emissions
A.2.1 Mains supply
The manufacturer recommends that the welding equipment is connected to the mains supply. Where there is
some interference, additional safety precautions may be necessary, i.e. filter for the power supply.
A.2.2 Maintenance of the welding equipment
Regular maintenance intervals are recommended by the manufacturer.
A.2.3 Weld cables
Welding cables should be as short as possible and should be run close together on or near to the floor.
A.2.4 Potential equalization
The electric connection of all metal parts in and near a welding machine should be taken into account. The metal
parts connected to the workpiece may increase the risk of an electric shock if the welder touches these metal
parts and the electrode at the same time. The welder should be protected against all connected metal parts.
A.2.5 Earth connection of workpiece
It must be ensured that earthing of the workpiece does not increase the risk of accident to the user or causes
damage to other electrical equipment.
A.2.6 Screening
Selective screening of other cables and equipment in the vicinity may reduce electrical interference. Screening
of the complete welding equipment may be considered in special situations.
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