An electric arc flash is a dangerous release of energy created by an electrical fault that contains thermal energy, pressure waves, acoustical energy and debris. The intense energy and very short duration of an electric arc flash represents a very unique exposure. The temperature of an electric arc flash can reach 35,000oF.
The thermal energy released in an electric arc flash is expressed in calories per centimeter squared (cal/cm2). A typical electric arc flash can release energy levels from 4 cal/cm2 to 30 cal/cm2 and exposures between 30 cal/cm2 and 60 cal/cm2 are not uncommon. Everyday work clothes made from regular cotton or poly/cotton fabrics can be readily ignited at exposure levels as low as 4/5 cal/cm2 and once ignited will continue to burn adding to the extent of injury sustained from the arc alone.
This video takes approx 2 minutes to see the full extent of Arc Explosion, this is in real time is less than 5 seconds.
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KEMA is the largest high-power electrical testing laboratory in the United States. Providing electrical power, dielectric, and mechanical testing services to a variety of clients in the energy and utility industry. KEMA is an independent lab not affiliated with any manufacturers or suppliers. Providing measurements for equipment performance, and third-party testing, inspection, and certification services. Test reports and type test certificates are recognized and accepted by manufacturers, utilities, and end users of electrical power equipment worldwide. Located in Chalfont, Pennsylvania, USA.
