Due the parasitic capacitances Cp, the cur-
rent flows via the transmitter earth.TBS
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Example:
There electric field between different compon-
ents system. The resulting
interference voltage overlaps with the input voltage
and disrupts signal transmission. The parasitic capacitances cause in-
terference currents that affect nearby cables:
Transmitter
Data cable
Nearby cable with potential difference
Parasitic capacitance
Interference currents
Disturbed signal
Effect capacitive coupling transformer
An unconnected shield does not
protect the system from the influ-
ence interference such as:
• Crosstalk
• Inductive coupling
• Capacitive coupling
The voltages and relate absolute protective
earth. Parasitic capacities
occur for example the range.
TBS
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227
Chapter The internal lightning protection system
