Stray Losses in Transformer Clamping Plate

Stray losses in transformer clamping plate can be a considerable part of the overall stray loss in transformer. In this paper clamping plate loss distribution is shown. Methods of loss reduction were analyzed. Impact of changing clamping plate position and bracket design, material and position on the stray losses was analyzed. Different tapping positions with different stray flux were analyzed. Calculations were done using a FEM program on a 300 MVA, three-phase, three-leg transformer.