January 15, 2018

A substation is a hazardous work environment in which regular maintenance and operations of electrical switchgear is performed. Trapped key interlocks are an integral part of switchgear applications and can prevent the paralleling of two energy sources, drive the pre-determined sequence of breaker operations, prevent the disconnect of breakers under load, and minimize the possibility of a hazardous arc flash. Trapped key interlocks within these maintenance and operational procedures are often pa...

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