The risk of arc initiation and related hazards in case of LLM in high voltage systems

OData support
Dr. Németh Bálint
Department of Electric Power Engineering

The basic topics of my thesis are the live-line maintenance (LLM) in high-voltage transmission systems, and the workers’ protection from electric arc.

The paper describes the requirements of MSZ IEC 60895 standard about conductive clothing, after a brief introduction of LLM and arc protection. Thereafter I use a method, which is suitable for the calculation of the incident energy in the environment of a high current and long length electric arc. During that I present the electrical characteristics of the arc as well. In the next section, I apply the method – taking into account the physical properties of the Hungarian electrical transmission system – in the case of two technological arrangements developed by Dr. Béla Csikós, when arc initiation might be possible, based on foreign and previous cases of other technologies.

In the last section I compare the calculated incident energy with values of a guideline for the selection of arc protection devices, to reveal whether it is possible to protect the LLM workers from damaging effects of an electric arc or not.


Please sign in to download the files of this thesis.