Improperly maintained switches and circuit breakers.Environment conditions like moisture or humidity.
The main origins of arc flash are wrong operations, faults on electrical installations or other situations such as: One of the motifs of the decrease of safety distances may be works performed in installations, namely in the case of exposed overhead equipments in outdoors switchgears. If the distance between two live phases or between a live phase and the earth is shorter than the insulation safety distance the air becomes ionized and an electric arc will be formed.
The arc flash, also known as arc blast, is an electric arc resulting from a low-impedance connection phase-to-phase or phase-to-earth, provoking a kind of electrical explosion.Ģ.