# US 2020/0403399 A1 · Equipment enclosure with self-sealing multilayer wall structure > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2020/0403399 A1 - Document ID: US20200403399A1 - Status: Published application - Kind: A1 - Application number: 16/444,765 - Filed: 2019-06-18 - Published: 2020-12-24 - Earliest claimed: 2019-06-18 - Assignees: Eaton Intelligent Power Limited - Applicants: Eaton Intelligent Power Limited - Inventors: Richard Bhalla - Web page: https://patentgrep.com/patent/US20200403399A1 ## CPC - H02B 13/025: Safety arrangements, e.g. in case of excessive pressure or fire due to electrical defect - H05K 5/069: {Other details of the casing, e.g. wall structure, passage for a connector, a cable, a shaft} - H01T 4/04: Housings (H01T4/06 takes precedence) - H02B 13/045: Details of casing, e.g. gas tightness - H02B: BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS - H01T: SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES (overvoltage protection circuits H02H) ## Abstract A wall for an electrical equipment enclosure includes an outer panel, an inner panel having a first side facing a chamber of the enclosure and a second side facing the outer panel, and at least one flange spaced apart from the outer panel and facing at least one peripheral portion of the inner panel and configured to prevent movement of the at least one peripheral portion of the inner panel towards the outer panel. The first panel is configured to press the at least one peripheral portion against the at least one flange responsive to pressure generated by an arc flash to form a seal between a periphery of the inner panel and the at least one flange that impedes passage of arc flash gases. ## Claims ### Claim 1 A wall for an electrical equipment enclosure, the wall comprising: a frame defining an opening and having at least one flange adjacent the opening; a first panel attached to the frame and covering the opening; and a second panel having at least one peripheral portion facing the at least one flange, wherein the second panel is not attached to the at least one flange and the at least one peripheral portion is configured to press against the at least one flange responsive to pressure applied to the second panel. ### Claim 2 (depends on 1) The wall of claim 1, further comprising a brace extending across the opening and wherein the second panel has a central portion contacting the brace. ### Claim 3 (depends on 2) The wall of claim 2, wherein the brace comprises a rib member having first and second ends attached to the frame at first and second sides of the opening. ### Claim 4 (depends on 2) The wall of claim 2, wherein the brace is disposed on a first side of the second panel, wherein the first panel is disposed on a second side of the first panel and wherein the second panel is fastened to the brace. ### Claim 5 (depends on 4) The wall of claim 4, wherein the brace comprises a first brace on the first side of the second panel and further comprising a second brace between the first panel and the second panel such that the second panel is disposed between the first brace and the second brace. ### Claim 6 (depends on 5) The wall of claim 5, wherein the opening is rectangular, wherein the first brace comprises a first rib member having first and second ends attached to the frame at first and second sides of the opening, and wherein the second brace comprises a second rib member attached to the first panel and extending parallel to the first rib member. ### Claim 7 (depends on 1) The wall of claim 1, wherein the frame comprises: first, second, third and fourth frame members on respective sides of the opening; and first, second, third and fourth angle members on respective ones of the first, second, third and fourth frame members and having respective first, second, third and fourth flange portions that face respective first, second, third, and fourth peripheral portions of the second panel. ### Claim 8 (depends on 1) The wall of claim 1, wherein the second panel faces a chamber of the enclosure and wherein the second panel is configured to press the at least one peripheral portion against the at least one flange responsive to pressure generated by an arc flash generated in the chamber to form a seal between a periphery of the first panel and the at least one flange that impedes passage of arc flash gases from the chamber toward the second panel. ### Claim 9 (depends on 1) An enclosure comprising the wall of claim 1. ### Claim 10 A wall for an electrical equipment enclosure, the wall comprising: a rectangular frame; a first rectangular panel attached to the rectangular frame around a periphery thereof; first, second, third, and fourth flanges disposed at respective ones of first, second, third and fourth sides of the frame; a first rib member extending between opposite sides of the rectangular frame; a second rectangular panel parallel to the first rectangular panel, attached to the first rib member, and having respective first second, third, and fourth peripheral portions that face respective ones of the first, second, third, and fourth flanges; and a second rib member between the first and second rectangular panels and extending parallel to the first rib member. ### Claim 11 (depends on 10) The wall of claim 10, further comprising first, second, third and fourth angle members attached to the frame at respective first, second, third and fourth sides thereof and wherein the first, second, third and fourth flanges are flange portions of respective ones of the first, second, third and fourth angle members. ### Claim 12 (depends on 10) The wall of claim 10, wherein the second rectangular panel faces a chamber of the enclosure and is configured to press against the first, second, third, and fourth flanges responsive to pressure generated by an arc flash generated in the chamber to form a seal between a periphery of the second rectangular panel and the first, second, third, and fourth flanges that impedes passage of gases from the arc flash toward the first rectangular panel. ### Claim 13 (depends on 10) An enclosure comprising the wall of claim 10. ### Claim 14 A wall for an electrical equipment enclosure, the wall comprising: an outer panel; an inner panel having a first side facing a chamber of the enclosure and a second side facing the outer panel; and at least one flange spaced apart from the outer panel and facing at least one peripheral portion of the inner panel and configured to prevent movement of the at least one peripheral portion of the inner panel towards the outer panel, wherein the peripheral portion of the inner panel is not attached to the flange. ### Claim 15 (depends on 14) The wall of claim 14, further comprising a frame, wherein a peripheral portion of the outer panel is attached to the frame, and wherein the at least one flange comprises at least one flanged portion of the frame. ### Claim 16 (depends on 15) The wall of claim 15, wherein the frame comprises at least one frame member and wherein the flanged portion comprises a flange portion of an angle member attached to the frame member between the outer panel and the inner panel. ### Claim 17 (depends on 16) The wall of claim 16, wherein the frame is rectangular, wherein the at least one frame member comprises first, second, third and fourth frame members arranged in a rectangle, wherein the outer panel is attached to the first, second, third, and fourth frame members round a periphery of the outer panel, and wherein the at least one flanged portion of the frame comprises respective flange portions of respective first, second, third, and fourth angle members attached to respective ones of the first, second, third, and fourth frame members. ### Claim 18 (depends on 16) The wall of claim 16, wherein the frame is rectangular, wherein the at least one frame member comprises first, second, third and fourth frame members arranged in a rectangle, and wherein the wall further comprises a brace extending between opposite ones of the first, second, third and fourth frame members and contacting the inner panel. ### Claim 19 (depends on 18) The wall of claim 18, wherein the brace comprises a first brace attached to the inner panel on the first side of the inner panel and a second brace disposed on the second side of the inner panel between the inner panel and the outer panel. ### Claim 20 (depends on 14) The wall of claim 14, wherein the inner panel faces a chamber of the enclosure and wherein the first panel is configured to press the at least one peripheral portion against the at least one flange responsive to pressure generated by an arc flash generated in the chamber to form a seal between a periphery of the inner panel and the at least one flange that impedes passage of arc flash gases from the chamber toward the outer panel.