![]() This kind of temperature can set fire to clothing and severely burn human skin in fractions of a second at a significant distance from the event. This is hotter than the surface of the sun. The arc causes an ionization of the air, and arc flash temperatures can reach as high as 35,000 degrees Fahrenheit. An Arc Flash event can expel large amounts of deadly energy. The Arc Flash can be initiated through accidental contact, equipment which is underrated for the available short circuit current, contamination or tracking over insulated surfaces, deterioration or corrosion of equipment and, or parts, as well as other causes. ![]() An Arc Flash occurs during a fault, or short circuit condition, which passes through this arc gap. What is an Electric Arc?Īn electric arc is a luminous bridge formed in a gap between two electrodes. Although an arc flash study can be time consuming, a correctly executed study can help improve plant safety by identifying where the most dangerous hazards are located and whether or not safety can be improved. Preparing for the study in advance can make the process much easier and more accurate. There are several software packages available like ETAP, similar to short circuit study and coordination study software packages, to facilitate this analysis by a qualified professional electrical engineer.Īn arc flash hazard study is a complicated engineering survey and analysis that typically is performed by an engineering consultant. ![]() In order to identify the specific arc flash hazard at a given piece of equipment within a facility, an arc flash study must be performed. This landmark document defines equations and methods that have become key components of the arc flash study. Arc flash study came into picture ten years ago when IEEE 1584, known as “IEEE Guide for Performing Arc Flash Hazard Calculations,” was first introduced.
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