Calculating Arc Flash in DC Systems
In most AC systems, bolted fault current is much-much higher (usually 10X or more) than normal operating currents. So it is relatively easy to set protective devices to trip in times short enough to reduce the arcing hazard incident energy. Bolted fault current in DC systems, while very high, may not be as high when compared to normal operating currents. It can be difficult to set protective devices to trip on arcing currents and still tolerate the transients which occur during normal operation.
In this refresher webinar, given by Jim Chastain at EasyPower, he discusses the modeling of DC systems and covers the options available in EasyPower tools to predict arcing current and incident energy.