On the Effects of Lamination Artificial Faults in A 15 kVA Three-phase Transformer Core

Cutting and punching of the steel used in power transformer core may cause edge burrs. This, along with degradation lamination insulation, can lead to interlaminar short circuits. Analysing these faults helps understanding their effect on reliability performance. In this light, actual paper aims experimentally simulate analyse both using a 15 kVA three phase transformer. Effects produced from selected are investigated where different scenarios considered such as area affected regions number short-circuited laminations. Various flux densities ranging 0.5 1.8 T. Of interest, current at no load is recorded test repeated for any given scenario. The obtained results presented discussed study each fault Overall, increases short-circuits between laminations faults. This increase related density, which dependent sensitive circuit location. Such findings represent good indication severity circuits relative position core, be exploited discuss losses core.