User Manual
Section 7
GFK-2958L
May 2021
Earthing and shielding
423
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Protect the connection point against corrosion (e.g. using grease; Attention: only use
grease suitable for the purpose)
7.3.6
Cabinet Design According to EMC Guidelines
Figure 256: Cabinet Design
Features for EMC Compliance
1.
Earthing strips
Earthing strips must be used
for connecting inactive metal
parts if it is not possible to
connect two large pieces of
metal. Use short earthing strips
with large surfaces.
2.
Clamping bracket for signal cables
If shielded signal cables are used, the shield must
be attached to the clamping bracket (KLBÜ series)
on the busbar over a large surface. The braided
shield must cover and make good contact with a
large part of the clamping bracket.
3.
Mounting plate
The support beam for holding control components
must be connected to a large part of the cabinet
housing.
4.
Busbar
The busbar must be connected via the rail holding
fixture. The cable shields are fixed to the busbar.
19.
Protective earth conductor rail
The protective earth conductor rail must likewise
be attached to a large part of the mounting plate,
and it must be connected to the protective earth
conductor system via an external cable with a
cross-section of at least 10 mm2, in order to
discharge interference current.
5.
Protective earth terminal strip
The protective earth terminal strip must be
connected to the protective earth conductor rail in
a neutral-point configuration.
6.
Cable to protective conductor system
(earthing point)
The cable must be connected to a large part of the
protective conductor system.
Refer to EMC Directive 2004/108/EC
