Lightning protection guide by OBO

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Last revision 2020

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

Strana 226 z 288

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Thus cable support sys- tems can make contribution the reduction of coupling from the source the sink. This means that EMC is a basic factor taken into consideration during the planning installations and cabling systems.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). Electrical resources emit electromagnetic interfer- ences (emission), which are picked other devices units (immission) which act receivers (interference sink). Cable support systems and their contribution to EMC Cable support systems can make important contri- bution the improvement EMC. The task of EMC planning ensure the compatibility the source, coupling path and sink using appropriate measures. The various shield types are presen- ted below. 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 . Data cable without shield A systematic planning process necessary guar- antee EMC. These should connected the equipotential bonding sys- tem enable the coupled interference factors be conducted away. During their daily work, planners and in- stallation engineers are confronted with this subject on an increasingly regular basis. the EU, electromagnetic compatibil- ity dealt with the EMC Directive 2014/30/EU. This because cables are run within cable sup- port systems are shielded them. They are passive and can thus make safe, long-lasting contribution to EMC. In distributed systems, cable lengths several hun- dred metres are not uncommon. This gives the planner important engineering parameters for cable support systems for the EMC engineering. 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 shielding ac- tion cable support systems can quantified the coupling resistance and the shield attenuation. The interference sources must identi- fied and quantified. The interferences can then spread along cables the form electromagnetic waves. Routing cables inside cable support systems greatly reduces the gal- vanic decoupling and coupling due electrical and magnetic fields the cables. The coupling describes the spread of the interference from the interference source to the influenced device, the interference sink. Depending the cable type, shields can used data cables to protect the signal lines from interference. This, turn, means that the func- tion interference sink can severely reduced, and, the worst-case scenario, total failure and eco- nomic losses