What is the definition of metal-enclosed power switchgear?

The definition of metal-enclosed power switchgear is indeed that it is a switchgear assembly with sides and top covered by sheet metal, containing primary power circuit devices. This description highlights the primary characteristics of metal-enclosed switchgear, specifically its construction and purpose.

Metal-enclosed switchgear is designed to provide not only electrical distribution but also to enhance safety by preventing accidental contact with energized components. The metal enclosure serves as a protective barrier that limits the exposure of primary circuit devices to environmental factors and unauthorized access. This is crucial for maintaining operational integrity and ensuring safety in electrical installations.

The other options do not fully encapsulate the specific definition of metal-enclosed power switchgear. While the management of power distribution or protective functions relate to the broader category of electrical equipment and devices, they do not emphasize the unique attributes of a metal-enclosed configuration. Each of those aspects may belong to various components within an electrical system, but the defining feature of metal-enclosed switchgear is its enclosed construction with primary power circuit devices inside, focused on both containment and safety.