Arc Flash is the result of a rapid release of energy due to an arcing fault. The arcing fault usually occurs between a phase bus bar and another phase bus bar, neutral or a ground- and are also usually limited to bus voltages larger than 120V.
What happens during an ArcFlash?
The cause of the short normally burns away during the initial flash and the arc fault is then sustained by highly conductive plasma, which freely conducts all available energy and can only be limited by the inhibition of the arc. This creates an enormous energy discharge which ignites the bus bars, vaporizing the copper and causing an explosive volumetric increase (the arc blast) with an expansion of 40,000 to 1. ArcFlash explosions are fiery explosion characterised by lethal shrapnel.
Read more about how to perform ArcFlash Hazard Analysis
Contact us learn more about substation safety, or to enquire about any of our substation safety equipment..