One Mill´s Response to a Specific Type of Arc Flash Problem

It is sometimes a difficult concept to get across to those most affected, but the greatest arc flash hazards in a mill´s electrical distribution system often do not occur at the highest voltages. In fact, they often occur at much lower voltages, such as 480 or 575 V, on the secondary bushings and bus of low-voltage unit substations. This paper describes one mill´s response to this challenge.