Managing Arc Flash: Collaborative Solutions in Medium-Voltage Switchgear

Many articles have been written about arc-flash events, mostly with a single focus. This article brings forth a wider view with a time/distance analysis of different arc abatement technologies in medium-voltage, metal-clad switchgear. The IEEE C37.20.7 [8] actual test results data, obtained from a certified high-voltage test facility, offers the reader a true snapshot of pressures developed within standard metal-clad switchgear enclosure using the latest blend of arc abatement topologies. Comparisons are made between the three prevalent technologies, which address an arc flash by time-magnitude approach boundaries. This article also addresses the phenomena associated with electrical arcs within medium-voltage switchgear by developing an introductory understanding of the generation of an arc and the pressure damages that both equipment and personnel may encounter.