Lightning protection guide by OBO

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Last revision 2020

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

Strana 13 z 288

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g. It not only lightning strikes that pose latent threat to these systems. buildings fitted with lightning protection sys- tems, the lightning current causes voltage drop at the earthing resistance.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 1. the ground near the building, step voltages pose further risk. banks media publishers, need reliable transmission paths. Out the open, crouching position provides protec- tion against direct lightning impact. The step voltage decreases with distance away from the point lightning impact. During thunder- storms too, high volumes energy are instantan- eously released. The greater the distance from the point where the current enters the ground, the lower the electrical potential the ground. All metal components and on the building must connected with the equipoten- tial bonding system rule out the risk high contact voltages. 1.2 Risks posed by lightning discharges Our dependency electrical and electronic equip- ment continues increase, both our professional and private lives. Step voltage and potential funnel formed when lightning strikes 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 13 Chapter General introduction . Sensitive databases, e. These voltage peaks can penetrate a building though all manner conductive connections and cause enormous damage.1 Risk humans When lightning hits buildings, trees even the ground itself, the lightning current enters the ground and so-called potential funnel forms. The difference potential produces step voltage that puts people and animals risk electric shock. More and more frequently, today's electronic aids are damaged surge voltages caused remote lightning discharges switching operations large electrical systems. Step voltage Us Potential gradient area Close the point strike/beside the down-conductor, the step voltage (1) high. Data networks companies or emergency facilities such hospitals and fire stations are lifelines for essential real time information ex- change.2. person touches the lightning protection system, they are risk harm due the large contact voltage