Modernization of the lightning protection standard

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Dr. Szedenik Norbert
Department of Electric Power Engineering

In Hungary, the MSZ 274 lightning protection standard was changed by the MSZ EN 62305 national lightning protection standard from the 1st of February, 2009. The two standards are significantly different both in principles, and in constructions. In the Hungarian standard, which has a history of several decades, the planned building was classified by five aspects and based on these aspects, the needed level of protection was defined by tables. However, in the new standard this process is not that simple, because it requires a detailed risk management for every building. This amounts to long calculations and to the definition of a vast number of parameters.

In my assignment, I will find out which variables have a small impact on the result of risk, and which variables can be stabilised. After this finding, I will execute the risk management process with all the possible values of the left parameters. The final results will be arranged in a table. From the tables we can find out that how much collection area of a building is needed to satisfy the RT tolerable risk at a given lightning protection level. These tables will be constructed for the planning of the lightning protection for a family house (country house according to the standard), as well as for an apartment house (according to the standard).

In Hungary, the National Fire (Safety) Code & Standard (OTSZ) specifies the usage of the actual lightning protection standard. The OTSZ regulates that in which cases the set up of the lightning protection device can be skipped. In my assignment, I will find out if the regulations of the OTSZ are in compliance with the current regulations of the MSZ EN 62305 lightning protection standard, based on the constructed tables for a country house and for an apartment house.


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