Data cable with shield
When laying the cable must ensured that the
shield connection continuous and earthed both
ends. Depending the coupling resistance the
cable and the shield cross-section, the shield may be
able withstand lightning current. cable shield that only earthed one end is
only effective against capacitive coupling.
Device 1
Device 2
Data cable
Shield connected both ends
Equipotential busbar
Earth connection
Cable shield earthed both ends
Transmitter
Data cable
Adjacent cable with potential difference
Parasitic capacitances
Interference currents
Interference-free signal
Shield for conducting interference currents away
Capacitive coupling onto the transmitter prevented the shield
TBS
Blitzschutz-Leitfaden
2018
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en
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2020/01/10
14:42:40
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2020/01/10
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Chapter The internal lightning protection system
. Shields that
are earthed both ends are additionally effective
against inductive coupling.
The cable the example connected both ends
so shielded against both capacitive and inductive
coupling