Losses in Trunk Busbars

Resumo

In recent years, almost all busbars have been created according to the package principle, in which busbars passing through insulation are tightly compressed into a package and placed in a protective metal case. Such design allows obtaining the minimum inductive reactance of the phase buses and, therefore, is characterized by minimum additional losses. However, the calculation of such systems is very tedious. As a result, nonoptimal structures are used. This article presents a simple calculation model taking into account the skin effect, proximity, and the screening effect. The theoretical data are compared to data obtained in practice at a full-scale plant test bench of domestic KLM-S trunk busbars.