Older circuit breakers contain an air extinguishing mechanism, which extinguishes an arc with a puff of air or an oil extinguishing mechanism, which extinguishes an arc with a jet of oil. Here, the term arc resistant refers to a breaker’s ability to extinguish electrical arcs. Improving the safety of switchgear power systemsĪlthough different buildings have different power system needs, the following strategies can help all buildings enhance the safety of switchgear power systems. However, the safety of switchgear itself is a critical concern. Electric systems, and those who maintain them, rely on the safety provisions of switchgear. In either case, their functions are the same: to de-energize equipment prior to maintenance, protect equipment against fault currents, and improve system availability by allowing access to generator power. Switchgear elements can be used in combination or independently. Switchgear is a series of electrical disconnects, fuses, and circuit breakers that isolate electrical equipment.
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