Lightning protection guide by OBO

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Last revision 2020

Vydal: OBO BETTERMANN s. r. o. Autor: OBO BETTERMANN

Strana 227 z 288

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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. TBS Blitzschutz-Leitfaden 2018 / en / 2020/01/10 14:42:40 14:42:40 (LLExport_02613) / 2020/01/10 14:42:54 14:42:54 227 Chapter The internal lightning protection system . Parasitic capacities occur for example the range.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 Example: There electric field between different compon- ents system. Due the parasitic capacitances Cp, the cur- rent flows via the transmitter earth. The resulting interference voltage overlaps with the input voltage and disrupts signal transmission