Lightning protection guide by OBO

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Last revision 2020

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

Strana 154 z 288

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8 according DIN 18014) around the external foundation the building.4404 1.4404 or 1.7. 1. Functional method Outside the building, least 80% the ring earth electrodes (surface earther's) overall length must in contact with the ground. ring earth elec- trode earther according arrangement type B. Normative requirements All types earth rods and potential coupling pieces must tested according IEC 62561-2 ED2. TBS Blitzschutz-Leitfaden 2018 / en / 2020/01/10 14:42:40 14:42:40 (LLExport_02613) / 2020/01/10 14:42:54 14:42:54 154 Chapter The external lightning protection system .5 mm • Stainless steel flat conductors, 3. Detachable connections in the ground must protected against corrosion (plastic corrosion protection strip).2 Materials for earthing systems.4571, should used.83 m Condition r≥l1 fulfilled.7.Materials for type A The following materials can used, amongst others: • Rods from stainless steel, mm • Galvanised steel rods, mm • Copper coated steel rods, mm • Stainless steel rods, mm • Galvanised steel flat conductors, 3.3. Earth rods (optional) Underground connection Main earthing busbar (MEB) Installation principle, ring earther Materials for ring earth electrodes The following materials can used, amongst others: • Stainless steel flat conductors, 3.0 and depth of 0.g.5 (or 0. Detachable connections the ground must protected against corrosion (plastic corrosion protection strip). Corrosion protection In potentially corrosive areas, rust-proof stainless steel with molybdenum content 2%, e. Condition for additional earthing measures With type earthing systems, the central radius r must greater than equal the minimum earth- ing length l1.g.2 Type ring earth electrodes The type ring earth electrodes laid around the building. 2. Corrosion protection In the earth, rustproof stainless steel with molyb- denum content 2%, e.5 mm • Galvanised steel pipes, mm See Chapter 2.83 m 31. r=√(A/π) r≥ l1 r: Medium radius the area covered the earther A: Area the earthing system m2 l1: Minimum earth length m Example Area 100 m2 , covered type earther Lightning protection class I, Sand, gravel, top layers (dry) 1,000 Ωm, l1 from "Minimum lengths earthers" m Result: A=100 m2 r=√(100m2 /π)=31.4571, should used.2 Materials for earthing systems. must installed a closed ring distance 1. In the earth, rustproof stainless steel with molybdenum content of should used.4. 1.5 mm • Galvanised steel flat conductors, 3.5 mm • Round conductors made copper, mm • Round conductors made stainless steel, Ø 10 mm • Round conductors made galvanised steel, Ø 10 mm See Chapter 2