{"id":4378,"date":"2026-01-23T08:30:00","date_gmt":"2026-01-23T08:30:00","guid":{"rendered":"https:\/\/honcon-electric.com\/?p=4378"},"modified":"2026-01-22T02:24:46","modified_gmt":"2026-01-22T02:24:46","slug":"switchgear-insulation-design-electric-field","status":"publish","type":"post","link":"https:\/\/honcon-electric.com\/fr\/switchgear-insulation-design-electric-field\/","title":{"rendered":"Pourquoi l\u2019isolation des appareillages de commutation \u00e9choue : le champ \u00e9lectrique est plus important"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"4378\" class=\"elementor elementor-4378\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6c975ea e-flex e-con-boxed e-con e-parent\" data-id=\"6c975ea\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-334853a elementor-widget elementor-widget-text-editor\" data-id=\"334853a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h3 data-start=\"743\" data-end=\"795\">Le v\u00e9ritable probl\u00e8me dans la conception de l\u2019isolation des appareillages de commutation<\/h3><p data-start=\"797\" data-end=\"1123\" class=\"translation-block\">La conception de l\u2019isolation des appareillages de commutation est un d\u00e9fi d\u2019ing\u00e9nierie au niveau syst\u00e8me, et non un simple processus consistant \u00e0 ajouter du mat\u00e9riau isolant l\u00e0 o\u00f9 une d\u00e9charge appara\u00eet. Lors des essais de tenue en tension aux impulsions, le fait de \u00ab corriger \u00bb aveugl\u00e9ment les points faibles peut temporairement supprimer les amor\u00e7ages, mais cela ne traite g\u00e9n\u00e9ralement pas la cause profonde et introduit souvent de nouveaux risques.<\/p><p data-start=\"1125\" data-end=\"1382\" class=\"translation-block\">Le facteur d\u00e9cisif derri\u00e8re la plupart des d\u00e9faillances d\u2019isolation n\u2019est pas une \u00e9paisseur insuffisante d\u2019isolant, mais la distribution du champ \u00e9lectrique. Une conception efficace de l\u2019isolation des appareillages de commutation consiste \u00e0 contr\u00f4ler les zones de forte intensit\u00e9 du champ \u00e9lectrique plut\u00f4t qu\u2019\u00e0 accumuler des mat\u00e9riaux.<\/p><hr data-start=\"1384\" data-end=\"1387\" \/><h3 data-start=\"1389\" data-end=\"1463\">Pourquoi la distribution du champ \u00e9lectrique est plus importante que l\u2019\u00e9paisseur de l\u2019isolation<\/h3><p data-start=\"1465\" data-end=\"1820\">Les d\u00e9charges partielles et les claquages se produisent lorsque l\u2019intensit\u00e9 locale du champ \u00e9lectrique d\u00e9passe les limites du mat\u00e9riau. Ajouter de l\u2019isolation sans remodeler le champ \u00e9lectrique d\u00e9place souvent les contraintes vers des interstices d\u2019air adjacents, ce qui rend les d\u00e9faillances plus probables. En pratique, l\u2019optimisation de la distribution du champ \u00e9lectrique apporte des am\u00e9liorations bien plus importantes que l\u2019augmentation de l\u2019\u00e9paisseur de l\u2019isolation.<\/p><p data-start=\"1822\" data-end=\"1938\">Ce principe est fondamental pour la conception fiable de l\u2019isolation des appareillages de commutation, en particulier dans des conditions de tension de choc.<\/p><hr data-start=\"1940\" data-end=\"1943\" \/><h3 data-start=\"1945\" data-end=\"2000\">G\u00e9om\u00e9trie des jeux de barres : un facteur critique souvent n\u00e9glig\u00e9<\/h3><p data-start=\"2002\" data-end=\"2379\">Le choix des jeux de barres influence directement l\u2019uniformit\u00e9 du champ \u00e9lectrique. Les jeux de barres rectangulaires en cuivre, tels que les conducteurs de 6 \u00d7 30 mm, cr\u00e9ent des ar\u00eates vives qui concentrent le champ \u00e9lectrique et offrent de mauvaises performances lors des essais d\u2019impulsion. En revanche, un jeu de barres tubulaire de \u03a6100 mm r\u00e9partit le champ \u00e9lectrique de mani\u00e8re homog\u00e8ne et am\u00e9liore consid\u00e9rablement la tenue aux impulsions sans augmenter l\u2019isolation.<\/p><p data-start=\"2381\" data-end=\"2472\">Cet exemple met en \u00e9vidence le r\u00f4le d\u00e9cisif de la g\u00e9om\u00e9trie dans la conception de l\u2019isolation des appareillages de commutation.<\/p><hr data-start=\"2474\" data-end=\"2477\" \/><h3 data-start=\"2479\" data-end=\"2549\">Constante di\u00e9lectrique et distribution de la tension dans les syst\u00e8mes d\u2019isolation<\/h3><p data-start=\"2551\" data-end=\"2798\">Lorsque diff\u00e9rents milieux d\u2019isolation sont connect\u00e9s en s\u00e9rie, la r\u00e9partition de la tension d\u00e9pend de la capacit\u00e9 plut\u00f4t que de l\u2019\u00e9paisseur. Les mat\u00e9riaux ayant des constantes di\u00e9lectriques plus \u00e9lev\u00e9es supportent une tension plus faible, ce qui concentre davantage de contrainte du champ \u00e9lectrique dans les interstices d\u2019air voisins.<\/p><p data-start=\"2800\" data-end=\"3038\">La r\u00e9sine \u00e9poxy a g\u00e9n\u00e9ralement une constante di\u00e9lectrique de 2,5 \u00e0 6,0, tandis que les plaques isolantes FR-4 se situent entre 4,2 et 4,7. Des combinaisons de mat\u00e9riaux inappropri\u00e9es peuvent d\u00e9former involontairement la distribution du champ \u00e9lectrique, compromettant ainsi la conception de l\u2019isolation des appareillages de commutation.<\/p><hr data-start=\"3040\" data-end=\"3043\" \/><h3 data-start=\"3045\" data-end=\"3100\">Positionnement des plaques d\u2019isolation : une erreur de conception fr\u00e9quente<\/h3><p data-start=\"3102\" data-end=\"3328\">Un erreur fr\u00e9quente consiste \u00e0 monter des panneaux d\u2019isolation phase-terre directement contre des parois m\u00e9talliques lat\u00e9rales. Cela augmente fortement l\u2019intensit\u00e9 du champ \u00e9lectrique dans la couche d\u2019air restante et d\u00e9grade les performances en tension d\u2019impulsion de polarit\u00e9 n\u00e9gative.<\/p><p data-start=\"3330\" data-end=\"3460\">Une conception correcte de l\u2019isolation des appareillages de commutation n\u00e9cessite un positionnement centr\u00e9 des panneaux isolants afin d\u2019obtenir une r\u00e9partition \u00e9quilibr\u00e9e du champ \u00e9lectrique.<\/p><p data-start=\"3462\" data-end=\"3749\">Une conception correcte de l\u2019isolation des appareillages de commutation n\u00e9cessite un positionnement centr\u00e9 des panneaux isolants afin d\u2019obtenir une r\u00e9partition \u00e9quilibr\u00e9e du champ \u00e9lectrique.<\/p><hr data-start=\"3751\" data-end=\"3754\" \/><h3 data-start=\"3756\" data-end=\"3824\">Une approche syst\u00e9mique pour une conception fiable de l\u2019isolation des appareillages de commutation<\/h3><p data-start=\"3826\" data-end=\"4147\">Sur la base de ces principes, nos syst\u00e8mes complets d\u2019appareillage de commutation adoptent d\u00e8s le d\u00e9part une approche globale de la conception de l\u2019isolation. Gr\u00e2ce \u00e0 la simulation du champ \u00e9lectrique, aux jeux de barres tubulaires, aux dispositions centr\u00e9es des isolants et aux structures de blindage modulaires, nous obtenons une distribution uniforme du champ \u00e9lectrique au niveau du syst\u00e8me.<\/p><p data-start=\"4149\" data-end=\"4362\">Des essais d\u2019impulsion \u00e0 grande \u00e9chelle confirment une conformit\u00e9 stable sans empilement excessif de mat\u00e9riaux, ce qui rend nos solutions id\u00e9ales pour les projets d\u2019\u00e9nergie renouvelable, les sous-stations pr\u00e9fabriqu\u00e9es et les environnements de distribution complexes.<\/p><p data-start=\"4149\" data-end=\"4362\" class=\"translation-block\">Vous recherchez un fournisseur fiable d\u2019appareillages de commutation ? Veuillez contacter Guang Dong Hao Cheng Electric Co., Ltd.<\/p><p data-start=\"4149\" data-end=\"4362\" class=\"translation-block\">Veuillez vous abonner \u00e0 notre cha\u00eene YouTube pour en savoir plus : Honcon.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-42fb56b e-flex e-con-boxed e-con e-parent\" data-id=\"42fb56b\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-95ee182 elementor-widget elementor-widget-image\" data-id=\"95ee182\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"600\" src=\"https:\/\/honcon-electric.com\/wp-content\/uploads\/2026\/01\/1-1.webp\" class=\"attachment-large size-large wp-image-4384\" alt=\"Switchgear Insulation Design\" srcset=\"https:\/\/honcon-electric.com\/wp-content\/uploads\/2026\/01\/1-1.webp 800w, https:\/\/honcon-electric.com\/wp-content\/uploads\/2026\/01\/1-1-300x225.webp 300w, https:\/\/honcon-electric.com\/wp-content\/uploads\/2026\/01\/1-1-768x576.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>The Real Problem in Switchgear Insulation Design Switchgear insulation design is a system-level engineering challenge, not a simple process of adding insulating material wherever discharge appears. In impulse withstand voltage tests, blindly \u201cpatching\u201d weak points may suppress flashover temporarily, but it rarely addresses the root cause and often introduces new risks. The decisive factor behind [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":4384,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"_joinchat":[],"footnotes":""},"categories":[1],"tags":[],"class_list":["post-4378","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"acf":[],"_links":{"self":[{"href":"https:\/\/honcon-electric.com\/fr\/wp-json\/wp\/v2\/posts\/4378","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/honcon-electric.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/honcon-electric.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/honcon-electric.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/honcon-electric.com\/fr\/wp-json\/wp\/v2\/comments?post=4378"}],"version-history":[{"count":8,"href":"https:\/\/honcon-electric.com\/fr\/wp-json\/wp\/v2\/posts\/4378\/revisions"}],"predecessor-version":[{"id":4387,"href":"https:\/\/honcon-electric.com\/fr\/wp-json\/wp\/v2\/posts\/4378\/revisions\/4387"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/honcon-electric.com\/fr\/wp-json\/wp\/v2\/media\/4384"}],"wp:attachment":[{"href":"https:\/\/honcon-electric.com\/fr\/wp-json\/wp\/v2\/media?parent=4378"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/honcon-electric.com\/fr\/wp-json\/wp\/v2\/categories?post=4378"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/honcon-electric.com\/fr\/wp-json\/wp\/v2\/tags?post=4378"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}