Lightning protection guide by OBO

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Last revision 2020

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

Strana 238 z 288

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Basic protection circuit measuring circuit Use lightning barriers measuring circuits Before lightning barriers are used measuring cir- cuits, must first confirmed whether resistance increase permitted. these systems, two further data cables be- sides earth are protected. FLD/FLD2 an- d/or MDP devices should therefore used this case. These devices can universally applied. current loops. Depending the decoupling, resistance increases the measuring circuits can oc- cur with types FRD and FRD2. Therefore, when used measuring cir- cuits with high transfer frequencies, lightning barriers with resistive decoupling elements are the preferred solution. Type series FRD2/FLD2 Type FRD2 and FLD2 are intended for use ground- referenced (symmetrical, potential-referenced) single- wire systems. In the case arrestors with integrated inductances for decoupling, the signal attenuated high transfer frequencies.g. These are systems whose signal circuits have common reference po- tential with other signal circuits, e.Circuit diagram lightning barrier FRD/FLD Circuit diagram lightning barrier FRD2/FLD2 Type series FRD/FLD Type FRD, FLD and MDP lightning barriers are de- signed for use so-called floating (asymmetrical, po- tential-free) two-core systems. TBS Blitzschutz-Leitfaden 2018 / en / 2020/01/10 14:42:40 14:42:40 (LLExport_02613) / 2020/01/10 14:42:54 14:42:54 238 Chapter The internal lightning protection system . The maximum operating current should also be verified ensure that the dissipated energy does not cause thermal destruction the decoupling elements. This can result er- rors with current loop measurements. Ground-referenced systems are signal circuits that have common reference potential with other signal circuits. The decision use FRD (with resistive decoupling) FLD (with inductive de- coupling) depends the system protected