Arc resistant electrical enclosure

摘要

Electrical enclosures are provided that include arc resistant features designed to add structural strength for arc containment, to inhibit arc propagation, and/or to direct the release of pressure within and/or from the enclosure in order to provide arc resistant electrical enclosures. In general, the arc resistant features may be designed to provide enclosures where in the event of an arc fault, the doors and covers remain closed, parts are not ejected from the enclosure, holes are not produced in the enclosure, indicators located in close proximity to the enclosure do not ignite, and/or grounding connections remain effective. Further, the foregoing features may be designed to provide electrical enclosures that comply with industry guides and standards for arc resistant ratings.

主权项

1. An electrical enclosure, comprising:
a shell configured to house electrical components within one or more interior compartments of the shell, the shell comprising opposing side panels, a rear panel coupled to the opposing side panels, and a top panel coupled to and disposed orthogonal to the opposing side panels and the rear panel, wherein the top panel comprises one or more apertures; at least one door for accessing the interior compartments; a pressure relief plate coupled to the top panel or integral with the top panel and comprising one or more flaps disposed over the one or more apertures and connected to the pressure relief plate by a perforated edge that enables the flaps to open to allow gases to escape from the shell; and a corner baffle disposed inside the shell and coupled to one of the opposing side panels, wherein the corner baffle comprises a first section that extends along and is coupled to the one of the opposing side panels, a second section that extends along and is coupled to the rear panel, and a third section coupled between the first and second sections, wherein the corner baffle extends axially along a corner formed where the one of the opposing side panels is coupled to the rear panel such that the third section forms a barrier opposite an angle formed by the corner.