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The influence of overlap length and overlapping design on core loss and magnetizing current of single‐phase two‐leg transformer core has been investigated The investigation was performed experimentally, on scaled models, and numerically, using 2D finite element method Two types of overlapping, mitred and staggered one, were investigated. It has been observed that the influence of overlap length on core magnetic characteristic is much higher in the case of the mitred overlap than that of the staggered one. This difference has been explained by the reduction of core cross section due to the triangle cutout in the mitred overlap.