Lightning protection guide by OBO

| Kategorie: Katalog  |

Last revision 2020

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

Strana 154 z 288

Jak získat tento dokument?






Poznámky redaktora
2. must installed a closed ring distance 1. Corrosion protection In potentially corrosive areas, rust-proof stainless steel with molybdenum content 2%, e. Detachable connections in the ground must protected against corrosion (plastic corrosion protection strip).5 mm • Galvanised steel flat conductors, 3. Functional method Outside the building, least 80% the ring earth electrodes (surface earther's) overall length must in contact with the ground.0 and depth of 0. In the earth, rustproof stainless steel with molybdenum content of should used.4571, should used.7.7.4571, should used.83 m Condition r≥l1 fulfilled.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, 3.2 Materials for earthing systems.3.g.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. 1.5 mm • Stainless steel flat conductors, 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. Corrosion protection In the earth, rustproof stainless steel with molyb- denum content 2%, e. ring earth elec- trode earther according arrangement type B.5 mm • Galvanised steel pipes, mm See Chapter 2. 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 .g.4404 1.83 m 31.2 Type ring earth electrodes The type ring earth electrodes laid around the building. 1.8 according DIN 18014) around the external foundation the building. 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)=31.2 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 l1.5 (or 0.4404 or 1. Detachable connections the ground must protected against corrosion (plastic corrosion protection strip).4