This
gives the planner important engineering parameters
for cable support systems for the EMC engineering. The shielding ac-
tion cable support systems can quantified the
coupling resistance and the shield attenuation. Routing cables
inside cable support systems greatly reduces the gal-
vanic decoupling and coupling due electrical and
magnetic fields the cables. The various shield types are presen-
ted below.
Cable support systems and their contribution to
EMC
Cable support systems can make important contri-
bution the improvement EMC. the EU, electromagnetic compatibil-
ity dealt with the EMC Directive 2014/30/EU.Here, talk electromagnetic compatibility
(EMC):
Electromagnetic compatibility (EMC) the ability an
electrical unit function satisfactorily its electro-
magnetic environment, without inappropriately influen-
cing this environment, which other units also belong
(VDE 0870-1). They are passive
and can thus make safe, long-lasting contribution to
EMC. The coupling describes the spread
of the interference from the interference source to
the influenced device, the interference sink. Thus cable support sys-
tems can make contribution the reduction of
coupling from the source the sink. This, turn, means that the func-
tion interference sink can severely reduced,
and, the worst-case scenario, total failure and eco-
nomic losses. The interference sources must identi-
fied and quantified.
Due the high complexity electromagnetic com-
patibility, the problems EMC must analysed and
solved using simplifying hypotheses and models, as
well experiments and measurements. The task
of EMC planning ensure the compatibility the
source, coupling path and sink using appropriate
measures.
In distributed systems, cable lengths several hun-
dred metres are not uncommon. The interferences can then spread
along cables the form electromagnetic waves. This means that EMC is
a basic factor taken into consideration during
the planning installations and cabling systems. These
should connected the equipotential bonding sys-
tem enable the coupled interference factors be
conducted away. Depending the
cable type, shields can used data cables to
protect the signal lines from interference. During their daily work, planners and in-
stallation engineers are confronted with this subject on
an increasingly regular basis. This because cables are run within cable sup-
port systems are shielded them.
Electrical resources emit electromagnetic interfer-
ences (emission), which are picked other
devices units (immission) which act receivers
(interference sink).
Data cable without shield
A systematic planning process necessary guar-
antee EMC.
Device 1
Device 2
Data cable
Shield not connected
Equipotential busbar
Earth connection
Cable without shield connected
TBS
Blitzschutz-Leitfaden
2018
/
en
/
2020/01/10
14:42:40
14:42:40
(LLExport_02613)
/
2020/01/10
14:42:54
14:42:54
226
Chapter The internal lightning protection system
