Lightning protection guide by OBO

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Last revision 2020

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

Strana 225 z 288

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The measure of shielding quality shown the shielding attenuation or shielding level.g. recent years, the use electronic circuits has increased continually.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 Mobile telecommunications mast SAS clamp clip connect the shielding braid with MDP surge protection devices 3. Whether industrial systems, medicine, households, telecommunications systems or electrical building installations everywhere there are powerful electrical equipment and systems, which switch ever greater currents, achieve greater radio ranges and transport ever more energy smaller spaces. If, for technical reasons, e. TBS Blitzschutz-Leitfaden 2018 / en / 2020/01/10 14:42:40 14:42:40 (LLExport_02613) / 2020/01/10 14:42:54 14:42:54 225 Chapter The internal lightning protection system .1. Existing cables can also shiel- ded using earthed cable support metal pipe sys- tems. Foil shields are particularly effective high frequencies, whereas braided shields are better suited low frequencies. order prevent Hz ground loops, direct connection the cable shield at both ends not possible, one end should be earthed directly and the other indirectly.3. creating an indirect earth connection via gas-discharge pro- tector, normal operation, the cable shield insu- lated one end. The consequence this that ever more opposing influ- ences (electromagnetic interferences) can occur from system parts and cables, causing damage and eco- nomic losses. large coupling occurs, the poten- tials can equalised through the ignited gas-dis- charge protector. However, the use state-of-the-art technology means that the complexity applications also increases.4 Cable shielding Cables are shielded with foil braided shields, or combinations the two