Mechanical stresses in busbar supports during short circuits

THE design of busbar layouts calls for the determination of the stresses occurring in the bus supports during short circuits, because the stresses in question may become sufficiently large to weaken, or even rupture, the supports. Moreover, an understanding of the factors affecting the stresses will often permit the designer to modify the layout so as to reduce the stresses, and thus save material or prevent failure. Hence investigations have been directed towards the calculation of support stresses due to electromagnetic forces caused by short-circuit currents in busbar structures.