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