{"id":946,"date":"2019-11-26T16:32:23","date_gmt":"2019-11-26T16:32:23","guid":{"rendered":"https:\/\/www.weidmann-group.com\/?p=946"},"modified":"2025-06-26T23:35:04","modified_gmt":"2025-06-26T22:35:04","slug":"nomex-edge-protection-rings","status":"publish","type":"post","link":"https:\/\/www.weidmann-group.com\/de\/news\/nomex-edge-protection-rings\/","title":{"rendered":"Nomex\u00ae Edge Protection Rings"},"content":{"rendered":"\n<p>Geometrically, Edge Protection Rings are characterized as Angle Rings, which protect the inner diameter of a winding, or as Caps to protect the outer diameter. The rings are specified using the following main dimensions: diameter, flange and collar, thickness, and edge radius.<\/p>\n\n\n\n<p>While the Angle Rings and Caps of the end insulation divide the respective oil gaps, the Edge Protection Rings reinforce the insulation of the conductor and are placed directly on its surface.<\/p>\n\n\n\n<p>The ratio of dimensions is adjusted according to individual specification, however they are typically small collars and flanges with a sharp edge radius of 1 \u2013 1.7 mm. Beyond the dimensional differences between Edge Protection Rings and \u201cclassical\u201d Angle Rings and Caps of an end insulation, is the difference in thermal exposure.&nbsp;Placed directly on the hot conductor insulation, cooling occurs only from one side via the oil gap. Specifically, designs that assume higher temperatures can be challenging in the long term as they promote accelerated aging of the particular component.<\/p>\n\n\n\n<p>Weidmann developed a new fabrication process that enables Edge Protection Rings to be manufactured from Nomex. Adjusted to the specified dimensions, it protects that critical section of the transformer, close to possible hot-spots. Using Nomex\u00ae, the risk of mechanical weakening of the particular part due to aging is eliminated. This meta-aramid based material is in the temperature class of 180\u00b0C.<\/p>\n\n\n\n<p>According to the Weidmann E-catalogue article E2D55, the spectrum of dimensions that are offered in cellulose covers the same range as Edge Protection Rings.<\/p>\n\n\n\n<p>Please do not hesitate to contact us for further information or advice.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Geometrically, Edge Protection Rings are characterized as Angle Rings, which protect the inner diameter of a winding, or as Caps to protect the outer diameter. The rings are specified using the following main dimensions: diameter, flange and collar, thickness, and edge radius. While the Angle Rings and Caps of the end insulation divide the respective [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":947,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[17],"tags":[],"class_list":["post-946","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-insulation-components"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Nomex\u00ae Edge Protection Rings - Weidmann Group<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.weidmann-group.com\/de\/news\/nomex-edge-protection-rings\/\" \/>\n<meta property=\"og:locale\" content=\"de_DE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Nomex\u00ae Edge Protection Rings - Weidmann Group\" \/>\n<meta property=\"og:description\" content=\"Geometrically, Edge Protection Rings are characterized as Angle Rings, which protect the inner diameter of a winding, or as Caps to protect the outer diameter. The rings are specified using the following main dimensions: diameter, flange and collar, thickness, and edge radius. 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