Analýza rizika při vzniku elektrického oblouku

Abstract

The thesis is deals with the arc flash hazard analysis, which is demanded by foreign legislation in design and operation of electrical equipment. This topic is not known in the Czech Republic. In opening chapters, the arc flash and its impact on a human being are analysed.The main chapters of the thesis deals with description of the analysis and the proces how to make arc flash analysis. Two main input parameters for the arc flash hazard analysis are described and analysed in detail: The highest value of bolted fault current and the time how long the fault lasts. In the conclusion of the thesis, the practical illustration of arc flash hazard analysis on chosen equipment of industrial grid on various voltages is made.