During the development of the fuse-element there was a need to calculate the Joule pre-arcing integral. The main goal of the master thesis is to make a simulation program of the Joule pre arcing integral calculation.
The calculation of the Joule pre-arcing integral was done by a simulation in the COMSOL Multiphysics program using the finite element method. The study is based on the time in which the fuse element reaches the melting temperature of copper. The course of electric current flowing through the fuse-element and determined by the electric circuit also taken into account. The simulation results are verified by laboratory measurements of the Joule pre arcing integral. An application for easy calculation is created.
Results demonstrate a good approximation of the effects in the fuse-element during the pre arcing time while breaking the short-circuit current. The calculated Joule pre arcing integral corresponds to the measurements of the Joule pre-arcing integral of manufactured fuse-links in the laboratory.
In the future, it would be necessary to develop the simulation program of the Joule arcing integral calculation. This would allow us to have a better insight into whole time of breaking the short-circuit current. The usefulness of this is reflected on discrimination test of fuse-links determination. On the other hand, the simulation would theoretically substantiate the knowledge of events in the fuse-link during the breaking of the short-circuit current.
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