Working distance is one of the important parameters of incident energy calculation in arc flash analysis along with fault clearing time of overcurrent protective devices and equipment constructions.
Working distance is defined as the distance between a person’s face and chest area and a prospective arc source.
Incident energy shall be calculated at specific working distance of employee. Working distance is functions of incident energy. Incident energy increases when the distance decreases and the incident energy decreases when the distance increases from potential arc source.
