Electrical losses developed into the mechanical reinforcing system's parts of the three-phase power transformers

The paper presents a study on the losses developed into the mechanical reinforcing system's parts of the three-phase power transformers. These losses are obtained based on the electromagnetic field near the parts. The electromagnetic field is computed using a 3D finite element method. It is also studied the influence of the magnetic permeability of the material that these parts are made of over the generated losses. The influence of the distance between the top-side of the windings and the U-shape tightening beams that press the magnetic yokes over the losses is also analyzed.