Mechanical stresses of electromagnetic origin. Effects produced by three-phase short-circuit currents on a rigid busbar system

This work presents a mathematical and parametric analysis of physical and electrical variables involved in electromechanical forces due to three-phase short-circuit currents. Focus is on three-phase currents since they usually cause higher stress on electrical power equipment. Since, in the authors' opinion, a fully practical understanding of IEC 60865-1 Standard [2] is not straightforward, electromagnetic force parameters are analyzed, evaluated, and compared aiming to relate the mentioned phenomenon to the standard. Graphical material is included to make the topic clear. Future papers will be focus on tests at a testing facility.