Dipol
2017-09-15 13:13:36
- #1
Lightning channels can be blown away by winds and storms.
Numerous side strikes registered on towers prove that lightning primarily but not necessarily strikes the highest points and not always the lowest impedance locations.
Preferred strike points are places with a high concentration of field lines, such as especially lightning rods or building corners.
Where lightning protection systems are required by building regulations or recommended after a risk analysis according to IEC 62305-2, it is not sufficient to install only an external lightning protection, commonly referred to as a lightning conductor (= capture and down conductors and grounding system); this must always be installed together with an internal lightning protection (= equipotential bonding and surge protection).
Lightning protection must therefore not only focus on direct strikes and requires an overall concept that takes into account that the sum of indirect overvoltage damages is approximately five times higher than that of direct lightning damages including total losses.
Therefore, after the transition period of DIN VDE 0100-443:2006-10 and DIN VDE 0100-534:2006-10 expires, surge protection will become mandatory even in new buildings without a lightning protection system.
Numerous side strikes registered on towers prove that lightning primarily but not necessarily strikes the highest points and not always the lowest impedance locations.
Preferred strike points are places with a high concentration of field lines, such as especially lightning rods or building corners.
Where lightning protection systems are required by building regulations or recommended after a risk analysis according to IEC 62305-2, it is not sufficient to install only an external lightning protection, commonly referred to as a lightning conductor (= capture and down conductors and grounding system); this must always be installed together with an internal lightning protection (= equipotential bonding and surge protection).
Lightning protection must therefore not only focus on direct strikes and requires an overall concept that takes into account that the sum of indirect overvoltage damages is approximately five times higher than that of direct lightning damages including total losses.
Therefore, after the transition period of DIN VDE 0100-443:2006-10 and DIN VDE 0100-534:2006-10 expires, surge protection will become mandatory even in new buildings without a lightning protection system.