Volba stykačů nn pro nebezpečné prostředí

Abstract

My bachelor thesis deals with suitable choice of contactors to environment with risk of explosion. The thesis also includes the analysis of classification of external influences in areas where electric equipments are installed. You can also find here some information about explosions: sources, physical properties of substances and other important concepts. In the following part, there are requirements for electric equipments installed in environment that is in danger of explosion, furthermore there is also described their labelling. The second part of my thesis deals with analysis of contactor and above all with possibility of structural design and the issue of switching. A great deal of the thesis is also focused on vacuum contactors regard to the issues of electric arc in vacuum and it is also focused on choice of suitable materials for electric contacts. The last part includes the choice of suitable contactors including comparison of several producers in EU.