Critical analysis of the standardisation of lightning protection

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Supervisor:
Dr. Szedenik Norbert
Department of Electric Power Engineering

Protection against lightning effects consists of internal and external lightning protection system (LPS). The most important and indispensable part of the external lightning protection is the protection against direct lightning strikes. In practice, it is achieved with installed air-termination system on the building. Lightning is a random, stochastic process. Those air-termination systems, which are installed according to the national standard, are not always effective. The question arises whether the fault is due to poorly designed standard.

The first part of my thesis contains the technical regulations of the lightning protection. I analyze the current National Fire (Safety) Codes & Standards and the Fire Safety Technical Directives. According to these documents, I create a complete description about the kind of protections that should be applied in individual cases.

As a next step in my dissertation, I will give a chronologic summary of the history of lightning, with relevant lightning attachment models. In this chapter I introduce the definitions related to the lightning protection, and the physical properties of the typical lightning flash.

After that I compare MSZ EN 62305:2006, MSZ EN 62305:2011/2012 and the third edition of IEC 62305 standard draft. This analysis covers only the differences between the air-termination systems.

My critical analysis will be based on the previously discussed topics, with the purpose to draw attention to the shortcomings and contradictions of the standard. In my thesis I serve modified proposals. With these modifications we could achieve a more efficient air-termination system. During my work I try to eliminate the contradictions and recommend changes.

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