Abstract: A metal enclosure for electrical switchgear, the metal enclosure is configured to be pressurized above atmospheric pressure, the metal enclosure including: metal walls sealing a volume for accommodating the electrical switchgear, the metal walls including a first metal wall arranged opposite a second metal wall, wherein the second metal wall includes elongated pockets on the inside face of the second metal wall, and metal beams arranged and attached in the elongated pockets, the metal beams are configured to strengthen the structural integrity of the second metal wall, a plane of the inside face of the second metal wall is substantially aligned with a plane of a surface of the metal beams that faces inside the metal enclosure.

Abstract: A metal enclosure for electrical switchgear, the metal enclosure is configured to be pressurized above atmospheric pressure, the metal enclosure having: metal walls sealing a volume for accommodating the electrical switchgear, the metal walls including a first metal wall arranged opposite a second metal wall, wherein at least the second metal wall is a corrugated metal plate with corrugations that extend along a first axis, a set of elongated metal elements attached to the first metal wall and to the second metal wall, the elongated metal elements are arranged through holes in the first metal wall and in the second metal wall and reach outside the metal enclosure, a set of elongated metal stiffeners attached to a rear side of the second metal wall outside the metal enclosure, each of the metal stiffeners is attached to at least two of the corrugations of the second metal wall, wherein each metal stiffener is attached to at least one of the elongated metal elements.