Lightning protection guide by OBO

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Last revision 2020

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

Strana 67 z 288

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1.5. S shape), because they are flexible lines. For practic- al purposes, the expansion piece spacings listed in Table 2. 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 67 Chapter The external lightning protection system .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 2.0 length the structure Non-metal 0.4 have proved effective. summer, the length of the air-termination systems and down-conductors changes. Material Expansion piece spacing m Steel 15 Stainless steel 10 Copper 10 Aluminium 10 Table 2.2 Changes length due temperature At higher temperatures, e.5 above the air-termination system Table 2.0 total area 2.3 External lightning protection for roof struc- tures Roof structures must incorporated into the external lightning protection system according IEC 62305-3 if they exceed the dimensions stated Table 2.1.4: Expansion pieces compensate changes in length due temperature 2. Ex- pansion pieces must allow flexible response to changes length, either through their shape (e. These temperature-related changes length must taken into account during installation.3 above roof level 1. Surge protection devices protect the electrical drives these devices from damage due inductive coupling. Roof structures Dimensions Metal 0.g.g.5: Incorporation roof structures Smoke and heat extraction roof light domes must protected from direct lightning strikes