The main goal of the diploma thesis is to study the influence of the fuse-element thickness on the distribution of current density within the conductor.
Skin effect is analyzed in the SRF fuse link, which is used as a part of overvoltage protection. During the development of the SRF fuse link doubts have arisen about the proper dimensioning of the fuse-element due to rapid current changes, which occur in overvoltages like lightning strikes. This can lead to skin effect within the fuse-element. The aim of the diploma thesis is to reduce the effects of this phenomenon by using thinner fuse-element.
Fuse-element modeling is performed in the Ansys Maxwell program environment. Finite element analysis is used for evolution of current density distribution in the existing and thinner fuse-element. Additionally, samples of fuse links are tested practically with existing and thinner fuse-element.
Results demonstrate that thinning the fuse-element does not eliminate the skin effect, making achievement of desired time current characteristic of fuse-link difficult.
In the future, it would be necessary to study other shapes and thickness of the fuse-element, which could reduce the skin effect.