In this article, EMS will compute the Lorentz force of a low-voltage busbar system during a short-circuit scenario, comparing the results with analytical solutions. The analysis focuses on a 3-phase busbar system. This paper concerns the effects of electrodynamic forces that act on current paths that are part of high-grade industrial distribution switchgear. What Does IEC 61439 Require for Low Voltage Switchgear Design? IEC 61439. subtransient reactance = 0.