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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Corrosion protection In potentially corrosive areas, rust-proof stainless steel with molybdenum content 2%, e. ring earth elec- trode earther according arrangement type B.3.7.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, 3.5 (or 0.5 mm • Round conductors made copper, mm • Round conductors made stainless steel, Ø 10 mm • Round conductors made galvanised steel, Ø 10 mm See Chapter 2.2 Type ring earth electrodes The type ring earth electrodes laid around the building.8 according DIN 18014) around the external foundation the building.4571, should used. Functional method Outside the building, least 80% the ring earth electrodes (surface earther's) overall length must in contact with the ground. 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 . Detachable connections the ground must protected against corrosion (plastic corrosion protection strip).2 Materials for earthing systems. Condition for additional earthing measures With type earthing systems, the central radius r must greater than equal the minimum earth- ing length l1.g.4. 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, 3.5 mm • Galvanised steel flat conductors, 3.5 mm • Galvanised steel pipes, mm See Chapter 2.0 and depth of 0. 1. Detachable connections in the ground must protected against corrosion (plastic corrosion protection strip).83 m 31.5 mm • Stainless steel flat conductors, 3. 1.7.4404 1.4404 or 1.4571, should used. 2.2 Materials for earthing systems. 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. must installed a closed ring distance 1.g. In the earth, rustproof stainless steel with molybdenum content of should used.83 m Condition r≥l1 fulfilled. Normative requirements All types earth rods and potential coupling pieces must tested according IEC 62561-2 ED2. Corrosion protection In the earth, rustproof stainless steel with molyb- denum content 2%, e