Lightning protection guide by OBO

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Last revision 2020

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

Strana 164 z 288

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this case the earth contact the foundation earther no longer intact. Because the foundation earther longer has contact with the earth here, additional grid ring earther must created. "Simple" films: • With simple films, the foundation earther effect is limited. • However, earthing resistance usually still suffi- cient. TBS Blitzschutz-Leitfaden 2018 / en / 2020/01/10 14:42:40 14:42:40 (LLExport_02613) / 2020/01/10 14:42:54 14:42:54 164 Chapter The external lightning protection system .Example: studded plastic strips Influence plastic films the earthing resistance Generally there negative influence between the strip foundation foundation plate and the earth in this area. • Further studded strips the exterior walls produce a very strong electrical insulating effect. Studded plastic strips • Made special, high-density polyethylene. the in- dividual membranes overlap, the earth contact of the foundation earther impaired. The foundation earther effective an earther the strip foundation the foundation plate