{"id":8721,"date":"2025-09-27T05:53:57","date_gmt":"2025-09-27T05:53:57","guid":{"rendered":"https:\/\/cntnmcb.com\/?p=8721"},"modified":"2025-09-29T07:00:32","modified_gmt":"2025-09-29T07:00:32","slug":"miniature-circuit-breaker-working-principle","status":"publish","type":"post","link":"https:\/\/cntnmcb.com\/fr\/miniature-circuit-breaker-working-principle\/","title":{"rendered":"Principe de fonctionnement du disjoncteur miniature"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"8721\" class=\"elementor elementor-8721\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-54dd356 e-flex e-con-boxed e-con e-parent\" data-id=\"54dd356\" 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-bd6ed86 elementor-widget elementor-widget-text-editor\" data-id=\"bd6ed86\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Le <\/span><a href=\"https:\/\/cntnmcb.com\/fr\/miniature-circuit-breaker\/\"><span style=\"font-weight: 400;\">disjoncteur miniature (MCB)<\/span><\/a><span style=\"font-weight: 400;\"> est le principal dispositif de protection parmi les dispositifs de protection du courant dans les syst\u00e8mes de distribution d'\u00e9lectricit\u00e9 \u00e0 basse tension.\u00a0<\/span><\/p><p><span style=\"font-weight: 400;\">Lorsqu'un court-circuit ou une surcharge se produit dans le circuit, il coupe automatiquement l'alimentation \u00e9lectrique afin de garantir la s\u00e9curit\u00e9 de l'\u00e9quipement \u00e9lectrique et d'\u00e9viter les pertes mat\u00e9rielles et les blessures corporelles caus\u00e9es par les incendies \u00e9lectriques.<\/span><\/p><p><span style=\"font-weight: 400;\">Ensuite, un aper\u00e7u d\u00e9taill\u00e9 du principe de fonctionnement du disjoncteur miniature (MCB) sera fourni.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-48795ae elementor-widget elementor-widget-image\" data-id=\"48795ae\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"512\" src=\"https:\/\/cntnmcb.com\/wp-content\/uploads\/2025\/09\/DZ47-NEITU.webp\" class=\"attachment-large size-large wp-image-8609\" alt=\"Sch\u00e9ma de la structure d&#039;un disjoncteur miniature\" srcset=\"https:\/\/cntnmcb.com\/wp-content\/uploads\/2025\/09\/DZ47-NEITU.webp 1024w, https:\/\/cntnmcb.com\/wp-content\/uploads\/2025\/09\/DZ47-NEITU-600x300.webp 600w, https:\/\/cntnmcb.com\/wp-content\/uploads\/2025\/09\/DZ47-NEITU-64x32.webp 64w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-578cd3f elementor-widget elementor-widget-heading\" data-id=\"578cd3f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Principaux composants et fonctions des disjoncteurs miniatures (MCB)<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3e6d7a5 elementor-widget elementor-widget-text-editor\" data-id=\"3e6d7a5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul><li><span style=\"font-weight: 400;\">La fonction d'un d\u00e9clencheur est d'identifier les d\u00e9fauts et de d\u00e9clencher la d\u00e9connexion : Lorsque le circuit fonctionne normalement, le d\u00e9clencheur est en sommeil et n'interf\u00e8re pas avec l'\u00e9tat marche-arr\u00eat du circuit.<\/span><\/li><\/ul><p>\u00a0<\/p><p><span style=\"font-weight: 400;\">Lorsqu'il d\u00e9tecte un courant\/une tension anormal(e) dans le circuit (comme un courant excessif en cas de surcharge, une augmentation soudaine du courant en cas de court-circuit ou un courant d\u00e9s\u00e9quilibr\u00e9 entre le fil sous tension et le fil neutre en cas de fuite), il pousse le m\u00e9canisme de verrouillage du disjoncteur miniature (MCB) \u00e0 se d\u00e9clencher, ce qui entra\u00eene la s\u00e9paration des contacts mobiles et statiques du disjoncteur et, en fin de compte, la coupure de l'alimentation en \u00e9lectricit\u00e9.<\/span><\/p><p>\u00a0<\/p><ul><li><span style=\"font-weight: 400;\">M\u00e9canisme de fonctionnement (centre d'ex\u00e9cution de l'action) : Il se compose d'\u00e9l\u00e9ments cl\u00e9s tels que des bielles et des ressorts qui forment un syst\u00e8me de liaison. Il sert \u00e0 relier le \"signal de d\u00e9clenchement du d\u00e9clencheur\" et l'\"action marche-arr\u00eat du contact\", ce qui permet des op\u00e9rations bidirectionnelles, notamment la \"fermeture\/ouverture manuelle\" et le \"d\u00e9clenchement automatique en cas de d\u00e9faut\".<\/span><\/li><\/ul><p>\u00a0<\/p><ul><li><span style=\"font-weight: 400;\">Le syst\u00e8me de contact est le composant conducteur et ex\u00e9cutif d'un disjoncteur miniature (MCB). Pendant le fonctionnement normal du circuit, le syst\u00e8me de contact sert de canal principal pour le courant. Lorsqu'une surcharge ou un court-circuit se produit dans le circuit, apr\u00e8s le d\u00e9clenchement du m\u00e9canisme de d\u00e9clenchement, le syst\u00e8me de contact effectue imm\u00e9diatement une \"action de d\u00e9connexion\" : il s\u00e9pare rapidement les contacts pour couper le courant et peut en m\u00eame temps \u00e9teindre l'arc g\u00e9n\u00e9r\u00e9 lorsque le courant de coupure est important, \u00e9vitant ainsi que le courant de coupure ne se propage \u00e0 l'ensemble du circuit.<\/span><span style=\"font-weight: 400;\">l'\u00e9limination des dommages caus\u00e9s par l'arc \u00e9lectrique.<\/span><\/li><\/ul><p>\u00a0<\/p><ul><li><span style=\"font-weight: 400;\">Chambre d'extinction de l'arc (garantie d'une interruption s\u00fbre) : Elle est enti\u00e8rement constitu\u00e9e de mat\u00e9riaux ignifuges. Elle peut \u00e9teindre rapidement l'arc \u00e9lectrique g\u00e9n\u00e9r\u00e9 lorsque les contacts se s\u00e9parent, emp\u00eachant ainsi la rupture de l'arc et la combustion des composants, et garantissant une interruption s\u00fbre du circuit.<\/span><\/li><\/ul><p>\u00a0<\/p><ul><li><span style=\"font-weight: 400;\">Bo\u00eetier (structure de protection de base) : Il isole physiquement les composants internes de l'environnement ext\u00e9rieur, emp\u00eachant les chocs \u00e9lectriques, la poussi\u00e8re et l'humidit\u00e9, afin de garantir le fonctionnement stable de l'appareil lui-m\u00eame.<\/span><\/li><\/ul><p>\u00a0<\/p><p><span style=\"font-weight: 400;\">Ensuite, une vue d'ensemble d\u00e9taill\u00e9e du principe de fonctionnement de la <\/span><a href=\"https:\/\/cntnmcb.com\/fr\/produit\/20a-mini-breaker-dz47-63\/\"><span style=\"font-weight: 400;\">disjoncteur miniature (MCB)<\/span><\/a><span style=\"font-weight: 400;\"> sera fournie.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-65cad1d elementor-widget elementor-widget-heading\" data-id=\"65cad1d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Processus de fonctionnement des disjoncteurs miniatures (MCB)<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-32e7a9d elementor-widget elementor-widget-video\" data-id=\"32e7a9d\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;youtube_url&quot;:&quot;https:\\\/\\\/www.youtube.com\\\/watch?v=SNBfppriDjc&quot;,&quot;video_type&quot;:&quot;youtube&quot;,&quot;controls&quot;:&quot;yes&quot;}\" data-widget_type=\"video.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-wrapper elementor-open-inline\">\n\t\t\t<div class=\"elementor-video\"><\/div>\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f78431f elementor-widget elementor-widget-heading\" data-id=\"f78431f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">1. \u00c9tat de fonctionnement normal<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f2e7fe7 elementor-widget elementor-widget-text-editor\" data-id=\"f2e7fe7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Lorsque le disjoncteur fonctionne normalement, le courant passe par le chemin de conduction r\u00e9gulier : borne d'entr\u00e9e \u2192 contact fixe \u2192 contact mobile \u2192 borne de sortie.\u00a0<\/span><\/p><p><span style=\"font-weight: 400;\">Pendant cette p\u00e9riode, le d\u00e9clencheur reste inactif, le m\u00e9canisme de commande reste en position ferm\u00e9e et les contacts maintiennent un \u00e9tat stable de contact \u00e9troit.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9950d4f elementor-widget elementor-widget-heading\" data-id=\"9950d4f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">2. Principe de la protection contre les surcharges<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b7b9948 elementor-widget elementor-widget-text-editor\" data-id=\"b7b9948\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Lorsque le d\u00e9clencheur thermique g\u00e9n\u00e8re une chaleur excessive en raison d'un \"courant de surcharge\", le bilame se plie sous l'effet de la chaleur. Le bilame pli\u00e9 pousse la bielle du m\u00e9canisme de fonctionnement, ce qui rompt l'\u00e9quilibre du m\u00e9canisme.\u00a0<\/span><\/p><p><span style=\"font-weight: 400;\">Le m\u00e9canisme de fonctionnement entra\u00eene alors la s\u00e9paration rapide du contact mobile et du contact fixe, coupant ainsi le circuit surcharg\u00e9.<\/span><\/p><p><span style=\"font-weight: 400;\">\u00a0Une fois que le bilame s'est refroidi et r\u00e9enclench\u00e9, le circuit peut \u00eatre remis en conduction en actionnant manuellement la poign\u00e9e pour fermer le disjoncteur.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-87042c1 elementor-widget elementor-widget-heading\" data-id=\"87042c1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">3. Principe de protection contre les courts-circuits<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b818ff8 elementor-widget elementor-widget-text-editor\" data-id=\"b818ff8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Lorsqu'un court-circuit se produit dans le circuit, l'augmentation soudaine du courant fait que la bobine du d\u00e9clencheur \u00e9lectromagn\u00e9tique g\u00e9n\u00e8re un champ magn\u00e9tique puissant, qui attire l'armature pour qu'elle agisse rapidement.\u00a0<\/span><\/p><p><span style=\"font-weight: 400;\">L'armature frappe le m\u00e9canisme de fonctionnement, rompant instantan\u00e9ment l'\u00e9quilibre ferm\u00e9.<\/span><\/p><p><span style=\"font-weight: 400;\">Les contacts se s\u00e9parent rapidement et la chambre d'extinction de l'arc \u00e9lectrique \u00e9teint simultan\u00e9ment l'arc \u00e9lectrique, emp\u00eachant le courant de court-circuit d'endommager continuellement l'\u00e9quipement.\u00a0<\/span><\/p><p><span style=\"font-weight: 400;\">Apr\u00e8s l'\u00e9limination du d\u00e9faut de court-circuit, le m\u00e9canisme de fonctionnement doit \u00eatre r\u00e9initialis\u00e9 manuellement pour s'assurer que le d\u00e9faut est compl\u00e8tement \u00e9limin\u00e9 avant le r\u00e9tablissement de l'alimentation \u00e9lectrique.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2a66dec elementor-widget elementor-widget-heading\" data-id=\"2a66dec\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">4. Processus de r\u00e9initialisation apr\u00e8s l'\u00e9limination des d\u00e9fauts<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-769922c elementor-widget elementor-widget-text-editor\" data-id=\"769922c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul><li><span style=\"font-weight: 400;\">Il am\u00e9liore la s\u00e9curit\u00e9 de l'utilisation de l'\u00e9lectricit\u00e9 dans les m\u00e9nages, en pr\u00e9venant les incendies provoqu\u00e9s par des courts-circuits dus \u00e0 la surcharge des appareils m\u00e9nagers et en prot\u00e9geant la s\u00e9curit\u00e9 des personnes et des biens.<\/span><\/li><\/ul><ul><li><span style=\"font-weight: 400;\">Il stabilise la distribution d'\u00e9nergie dans l'industrie, en veillant \u00e0 ce que les \u00e9quipements de production ne soient pas affect\u00e9s par un courant anormal et en r\u00e9duisant les pertes dues aux arr\u00eats de travail et aux arr\u00eats de production.<\/span><\/li><\/ul><ul><li><span style=\"font-weight: 400;\">Il offre une protection plus compl\u00e8te pour les r\u00e9seaux \u00e9lectriques \u00e0 basse tension, en mettant en \u0153uvre une protection hi\u00e9rarchique pour le terminal du r\u00e9seau et en emp\u00eachant l'expansion des d\u00e9fauts.<\/span><\/li><\/ul><ul><li><span style=\"font-weight: 400;\">Sa fonction de protection pr\u00e9cise et sa conception \u00e0 faible consommation d'\u00e9nergie permettent \u00e0 vos besoins en \u00e9lectricit\u00e9 de fonctionner de mani\u00e8re plus \u00e9cologique et plus efficace.<\/span><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-04cba47 elementor-widget elementor-widget-heading\" data-id=\"04cba47\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Conclusion<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f489933 elementor-widget elementor-widget-video\" data-id=\"f489933\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;youtube_url&quot;:&quot;https:\\\/\\\/youtu.be\\\/xzEdsvabZfo&quot;,&quot;video_type&quot;:&quot;youtube&quot;,&quot;controls&quot;:&quot;yes&quot;}\" data-widget_type=\"video.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-wrapper elementor-open-inline\">\n\t\t\t<div class=\"elementor-video\"><\/div>\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-30b64c6 elementor-widget elementor-widget-text-editor\" data-id=\"30b64c6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">En r\u00e9sum\u00e9, le principe de fonctionnement d'un disjoncteur miniature (MCB) s'articule autour de trois liens fondamentaux : \"la surveillance en temps r\u00e9el du courant du circuit, la r\u00e9ponse pr\u00e9cise aux signaux de d\u00e9faut et l'interruption s\u00fbre des circuits d\u00e9fectueux.\u00a0<\/span><\/p><p><span style=\"font-weight: 400;\">Gr\u00e2ce \u00e0 la coop\u00e9ration coordonn\u00e9e des composants principaux tels que les d\u00e9clencheurs thermiques, les d\u00e9clencheurs \u00e9lectromagn\u00e9tiques et les m\u00e9canismes de fonctionnement, il assure une protection pr\u00e9cise contre deux d\u00e9fauts de circuit courants : la surcharge et le court-circuit.\u00a0<\/span><\/p><p><span style=\"font-weight: 400;\">En fin de compte, cela permet de garantir le fonctionnement s\u00fbr des \u00e9quipements \u00e9lectriques et de pr\u00e9venir les incendies \u00e9lectriques \u00e0 la source.<\/span><\/p><p><a href=\"https:\/\/cntnmcb.com\/fr\/\"><b>CNTN<\/b><\/a><span style=\"font-weight: 400;\"> s'engage \u00e0 fabriquer des disjoncteurs miniatures. <\/span><\/p><p><span style=\"font-weight: 400;\">Tous les disjoncteurs miniatures fabriqu\u00e9s par CNTN ne sont autoris\u00e9s \u00e0 quitter l'usine qu'apr\u00e8s avoir pass\u00e9 des tests stricts. <\/span><a href=\"https:\/\/cntnmcb.com\/fr\/contact-us\/\"><span style=\"font-weight: 400;\">nous contacter<\/span><\/a><span style=\"font-weight: 400;\"> si vous avez des questions \u00e0 poser.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\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 miniature circuit breaker (MCB) is the core protection device among current protection devices in low-voltage power distribution systems.\u00a0 When a short circuit or overload occurs in the circuit, it will automatically cut off the power supply to ensure the safety of electrical equipment and prevent property losses and personal injuries caused by electrical fires. [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":8673,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"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":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-8721","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.0 (Yoast SEO v27.5) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Miniature Circuit Breaker Working Principle - Zhejiang CNTN Electric Co.,Ltd<\/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:\/\/cntnmcb.com\/fr\/miniature-circuit-breaker-working-principle\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Miniature Circuit Breaker Working Principle\" \/>\n<meta property=\"og:description\" content=\"The miniature circuit breaker (MCB) is the core protection device among current protection devices in low-voltage power distribution systems.\u00a0 When a short circuit or overload occurs in the circuit, it will automatically cut off the power supply to ensure the safety of electrical equipment and prevent property losses and personal injuries caused by electrical fires. 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