Vliv tepelného namáhání na elektrické vodiče

Abstract

The diploma thesis deals with the evaluation of the external thermal stress of electrical conductors for the purposes of determining the causes of a fire. The output of the diploma thesis is also the creation of a graphic aid for investigators of fire causes for easier determination of the fire temperature inside the place affected by the fire by means of changes in the optical properties of electrical cables and determining a more accurate fire scenario. In the theoretical part of the work, the current state of knowledge of conductors used in practice and the functioning of the activity of detecting the causes of fire, the description and structure of electric cables and the issue of fire origin are discussed. The practical part clarifies the preparation, used solutions and devices for the correct course of the experiment. Furthermore, the measured results are evaluated and a graphic aid for fire cause investigators with clear changes of individual cables is compiled from all the results.