{"id":12811,"date":"2025-03-04T15:10:00","date_gmt":"2025-03-04T07:10:00","guid":{"rendered":"https:\/\/www.tosunlux.eu\/?p=12811"},"modified":"2025-03-10T18:06:03","modified_gmt":"2025-03-10T10:06:03","slug":"breaking-capacity-vs-circuit-breaker-ratings","status":"publish","type":"post","link":"https:\/\/www.tosunlux.eu\/fr\/blog\/breaking-capacity-vs-circuit-breaker-ratings\/","title":{"rendered":"Pouvoir de coupure et valeurs nominales des disjoncteurs : sont-elles identiques ?"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_63 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" >Table des mati\u00e8res<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table des mati\u00e8res\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Basculer<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.tosunlux.eu\/fr\/blog\/breaking-capacity-vs-circuit-breaker-ratings\/#Key_Differences_Between_Breaking_Capacity_and_Circuit_Breaker_Ratings\" title=\"Principales diff\u00e9rences entre le pouvoir de coupure et les valeurs nominales des disjoncteurs\">Principales diff\u00e9rences entre le pouvoir de coupure et les valeurs nominales des disjoncteurs<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.tosunlux.eu\/fr\/blog\/breaking-capacity-vs-circuit-breaker-ratings\/#Understanding_Circuit_Breaker_Ratings\" title=\"Comprendre les valeurs nominales des disjoncteurs\">Comprendre les valeurs nominales des disjoncteurs<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.tosunlux.eu\/fr\/blog\/breaking-capacity-vs-circuit-breaker-ratings\/#Rated_Current_In\" title=\"Courant nominal (In)\">Courant nominal (In)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.tosunlux.eu\/fr\/blog\/breaking-capacity-vs-circuit-breaker-ratings\/#Rated_Voltage_Ue\" title=\"Tension nominale (Ue)\">Tension nominale (Ue)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.tosunlux.eu\/fr\/blog\/breaking-capacity-vs-circuit-breaker-ratings\/#Rated_Frequency_Hz\" title=\"Fr\u00e9quence nominale (Hz)\">Fr\u00e9quence nominale (Hz)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.tosunlux.eu\/fr\/blog\/breaking-capacity-vs-circuit-breaker-ratings\/#Breaking_Capacity_Icu_Ics\" title=\"Pouvoir de coupure (Icu \/ Ics)\">Pouvoir de coupure (Icu \/ Ics)<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.tosunlux.eu\/fr\/blog\/breaking-capacity-vs-circuit-breaker-ratings\/#What_is_Breaking_Capacity\" title=\"Qu&#039;est-ce que le pouvoir de coupure ?\">Qu&#039;est-ce que le pouvoir de coupure ?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.tosunlux.eu\/fr\/blog\/breaking-capacity-vs-circuit-breaker-ratings\/#Breaking_Capacity_Types\" title=\"Types de pouvoir de coupure\">Types de pouvoir de coupure<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.tosunlux.eu\/fr\/blog\/breaking-capacity-vs-circuit-breaker-ratings\/#Measuring_Breaking_Capacity\" title=\"Mesure du pouvoir de coupure\">Mesure du pouvoir de coupure<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.tosunlux.eu\/fr\/blog\/breaking-capacity-vs-circuit-breaker-ratings\/#Why_Breaking_Capacity_Matters_in_Electrical_Safety\" title=\"Pourquoi le pouvoir de coupure est important en mati\u00e8re de s\u00e9curit\u00e9 \u00e9lectrique\">Pourquoi le pouvoir de coupure est important en mati\u00e8re de s\u00e9curit\u00e9 \u00e9lectrique<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.tosunlux.eu\/fr\/blog\/breaking-capacity-vs-circuit-breaker-ratings\/#How_to_Select_the_Right_Circuit_Breaker_Based_on_Breaking_Capacity\" title=\"Comment choisir le bon disjoncteur en fonction de son pouvoir de coupure\">Comment choisir le bon disjoncteur en fonction de son pouvoir de coupure<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.tosunlux.eu\/fr\/blog\/breaking-capacity-vs-circuit-breaker-ratings\/#Step_1_Determine_the_Systems_Short-Circuit_Current\" title=\"\u00c9tape #1\u00a0: D\u00e9terminer le courant de court-circuit du syst\u00e8me\">\u00c9tape #1\u00a0: D\u00e9terminer le courant de court-circuit du syst\u00e8me<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.tosunlux.eu\/fr\/blog\/breaking-capacity-vs-circuit-breaker-ratings\/#Step_2_Match_the_Breakers_Breaking_Capacity\" title=\"\u00c9tape #2\u00a0:\u00a0Adapter le pouvoir de coupure du disjoncteur\">\u00c9tape #2\u00a0:\u00a0Adapter le pouvoir de coupure du disjoncteur<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.tosunlux.eu\/fr\/blog\/breaking-capacity-vs-circuit-breaker-ratings\/#Step_3_Consider_System_Voltage_and_Application\" title=\"\u00c9tape #3\u00a0: Tenir compte de la tension du syst\u00e8me et de l\u2019application\">\u00c9tape #3\u00a0: Tenir compte de la tension du syst\u00e8me et de l\u2019application<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.tosunlux.eu\/fr\/blog\/breaking-capacity-vs-circuit-breaker-ratings\/#Impact_of_Breaking_Capacity_on_System_Coordination\" title=\"Impact de la capacit\u00e9 de rupture sur la coordination du syst\u00e8me\">Impact de la capacit\u00e9 de rupture sur la coordination du syst\u00e8me<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.tosunlux.eu\/fr\/blog\/breaking-capacity-vs-circuit-breaker-ratings\/#FAQs_About_Breaking_Capacity_and_Circuit_Breaker_Ratings\" title=\"FAQ sur le pouvoir de coupure et les caract\u00e9ristiques nominales des disjoncteurs\">FAQ sur le pouvoir de coupure et les caract\u00e9ristiques nominales des disjoncteurs<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.tosunlux.eu\/fr\/blog\/breaking-capacity-vs-circuit-breaker-ratings\/#What_Determines_a_Circuits_Capacity\" title=\"Qu&#039;est-ce qui d\u00e9termine la capacit\u00e9 d&#039;un circuit ?\">Qu&#039;est-ce qui d\u00e9termine la capacit\u00e9 d&#039;un circuit ?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/www.tosunlux.eu\/fr\/blog\/breaking-capacity-vs-circuit-breaker-ratings\/#What_Happens_if_a_Breakers_Breaking_Capacity_is_Too_Low\" title=\"Que se passe-t-il si la capacit\u00e9 de coupure d\u2019un disjoncteur est trop faible ?\">Que se passe-t-il si la capacit\u00e9 de coupure d\u2019un disjoncteur est trop faible ?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/www.tosunlux.eu\/fr\/blog\/breaking-capacity-vs-circuit-breaker-ratings\/#How_is_Breaking_Capacity_of_a_Circuit_Breaker_Calculated\" title=\"Comment est calcul\u00e9 le pouvoir de coupure d&#039;un disjoncteur ?\">Comment est calcul\u00e9 le pouvoir de coupure d&#039;un disjoncteur ?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/www.tosunlux.eu\/fr\/blog\/breaking-capacity-vs-circuit-breaker-ratings\/#Is_a_Higher_Breaking_Capacity_Always_Better\" title=\"Un pouvoir de coupure plus \u00e9lev\u00e9 est-il toujours meilleur ?\">Un pouvoir de coupure plus \u00e9lev\u00e9 est-il toujours meilleur ?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/www.tosunlux.eu\/fr\/blog\/breaking-capacity-vs-circuit-breaker-ratings\/#How_Often_Should_Circuit_Breakers_Be_Tested_for_Breaking_Capacity\" title=\"\u00c0 quelle fr\u00e9quence les disjoncteurs doivent-ils \u00eatre test\u00e9s pour d\u00e9terminer leur pouvoir de coupure\u00a0?\">\u00c0 quelle fr\u00e9quence les disjoncteurs doivent-ils \u00eatre test\u00e9s pour d\u00e9terminer leur pouvoir de coupure\u00a0?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/www.tosunlux.eu\/fr\/blog\/breaking-capacity-vs-circuit-breaker-ratings\/#Breaking_Capacity_vs_Circuit_Breaker_Rating_Conclusion\" title=\"Pouvoir de coupure vs. Calibre du disjoncteur\u00a0: Conclusion\">Pouvoir de coupure vs. Calibre du disjoncteur\u00a0: Conclusion<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/www.tosunlux.eu\/fr\/blog\/breaking-capacity-vs-circuit-breaker-ratings\/#Resources\" title=\"Ressources:\">Ressources:<\/a><\/li><\/ul><\/nav><\/div>\n\n<p>Le pouvoir de coupure et les valeurs nominales des disjoncteurs sont souvent confondus, mais ils servent \u00e0 des fins diff\u00e9rentes dans les syst\u00e8mes \u00e9lectriques.&nbsp;<\/p>\n\n\n\n<p>Le pouvoir de coupure fait r\u00e9f\u00e9rence au d\u00e9faut maximal qui peut interrompre en toute s\u00e9curit\u00e9, tandis que les valeurs nominales des disjoncteurs couvrent plusieurs sp\u00e9cifications telles que la tension, le courant et <a href=\"https:\/\/www.tosunlux.eu\/fr\/blog\/the-interrupt-capacity-of-circuit-breakers\/\" target=\"_blank\" rel=\"noreferrer noopener\">capacit\u00e9 d&#039;interruption<\/a> des disjoncteurs.&nbsp;<\/p>\n\n\n\n<p>Choisir le bon disjoncteur n\u00e9cessite une compr\u00e9hension des deux.&nbsp;<\/p>\n\n\n\n<p>Dans ce guide, nous allons analyser leurs diff\u00e9rences et pourquoi les deux sont essentiels pour la s\u00e9curit\u00e9 \u00e9lectrique.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Key_Differences_Between_Breaking_Capacity_and_Circuit_Breaker_Ratings\"><\/span>Principales diff\u00e9rences entre le pouvoir de coupure et les valeurs nominales des disjoncteurs<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong>Aspect<\/strong><\/td><td><strong>Valeurs nominales des disjoncteurs<\/strong><\/td><td><strong>Capacit\u00e9 de rupture<\/strong><\/td><\/tr><tr><td>D\u00e9finition<\/td><td>L&#039;ensemble complet des sp\u00e9cifications \u00e9lectriques d&#039;un disjoncteur.<\/td><td>Le courant de d\u00e9faut maximal est celui que le disjoncteur peut interrompre en toute s\u00e9curit\u00e9.<\/td><\/tr><tr><td>Unit\u00e9 de mesure<\/td><td>Amp\u00e8res (A) pour le courant, Volts (V) pour la tension.<\/td><td>Kiloamp\u00e8res (kA) pour le courant de court-circuit.<\/td><\/tr><tr><td>But<\/td><td>D\u00e9finit le fonctionnement d&#039;un disjoncteur dans des conditions normales.<\/td><td>D\u00e9termine la capacit\u00e9 du disjoncteur \u00e0 g\u00e9rer les conditions de d\u00e9faut.<\/td><\/tr><tr><td>Importance<\/td><td>Assure un dimensionnement et une protection corrects des circuits.<\/td><td>Emp\u00eache les dommages lors de courts-circuits et assure la s\u00e9curit\u00e9 du syst\u00e8me.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Comprendre ces diff\u00e9rences aide \u00e0 s\u00e9lectionner le disjoncteur adapt\u00e9 \u00e0 chaque application \u00e9lectrique.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Understanding_Circuit_Breaker_Ratings\"><\/span>Comprendre les valeurs nominales des disjoncteurs<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"alignright size-large is-resized\"><img fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2022\/05\/TSN3-40-1024x1024.jpg\" alt=\"TSN3-40\" class=\"wp-image-7801\" width=\"262\" height=\"262\" srcset=\"https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2022\/05\/TSN3-40-1024x1024.jpg 1024w, https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2022\/05\/TSN3-40-300x300.jpg 300w, https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2022\/05\/TSN3-40-150x150.jpg 150w, https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2022\/05\/TSN3-40-768x768.jpg 768w, https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2022\/05\/TSN3-40-1536x1536.jpg 1536w, https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2022\/05\/TSN3-40-12x12.jpg 12w, https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2022\/05\/TSN3-40.jpg 1600w\" sizes=\"(max-width: 262px) 100vw, 262px\" \/><\/figure>\n<\/div>\n\n\n<p>La puissance nominale d&#039;un disjoncteur est un ensemble de param\u00e8tres \u00e9lectriques qui d\u00e9terminent le fonctionnement d&#039;un disjoncteur dans des conditions normales et de d\u00e9faut.<\/p>\n\n\n\n<p>Ces valeurs nominales garantissent le bon fonctionnement d&#039;un disjoncteur dans les limites de sa conception. Les principales caract\u00e9ristiques comprennent\u00a0:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Rated_Current_In\"><\/span>Courant nominal (In)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Il s&#039;agit du courant continu qu&#039;un disjoncteur peut supporter sans se d\u00e9clencher. Il est mesur\u00e9 en amp\u00e8res (A) et varie g\u00e9n\u00e9ralement de 1 A \u00e0 plusieurs milliers d&#039;amp\u00e8res, selon le type de disjoncteur.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Rated_Voltage_Ue\"><\/span>Tension nominale (Ue)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Cette tension d\u00e9finit la tension maximale du syst\u00e8me \u00e0 laquelle le disjoncteur peut fonctionner en toute s\u00e9curit\u00e9. Exemples\u00a0: 230\u00a0V, 400\u00a0V, 11\u00a0kV et 33\u00a0kV pour les applications basse, moyenne et haute tension.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Rated_Frequency_Hz\"><\/span>Fr\u00e9quence nominale (Hz)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>La plupart des disjoncteurs sont con\u00e7us pour fonctionner \u00e0 50 Hz ou 60 Hz, ce qui correspond aux alimentations CA standard du monde entier.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Breaking_Capacity_Icu_Ics\"><\/span>Pouvoir de coupure (Icu \/ Ics)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>C&#039;est l\u00e0 qu&#039;intervient le pouvoir de coupure. Il s&#039;agit du courant de d\u00e9faut maximal que le disjoncteur peut supporter sans subir de dommages permanents.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_is_Breaking_Capacity\"><\/span>Qu&#039;est-ce que le pouvoir de coupure ?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Le pouvoir de coupure (\u00e9galement appel\u00e9 pouvoir d&#039;interruption) d&#039;un disjoncteur est sa capacit\u00e9 \u00e0 interrompre les courants de court-circuit en toute s\u00e9curit\u00e9.&nbsp;<\/p>\n\n\n\n<p><a href=\"https:\/\/www.tosunlux.eu\/fr\/blog\/understanding-electrical-short-circuits-types-and-causes\/\" target=\"_blank\" rel=\"noreferrer noopener\">Lorsqu&#039;un court-circuit se produit<\/a>, une surtension massive traverse le disjoncteur et le circuit doit \u00eatre d\u00e9connect\u00e9 pour \u00e9viter les incendies \u00e9lectriques ou les dommages mat\u00e9riels.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Breaking_Capacity_Types\"><\/span>Types de pouvoir de coupure<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Il existe deux principaux types de pouvoirs de coupure :<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>Pouvoir de coupure ultime (Icu)<\/strong> \u2013 Le courant de d\u00e9faut le plus \u00e9lev\u00e9 qu\u2019un disjoncteur peut interrompre avant de tomber en panne.<\/li><li><strong>Pouvoir de coupure de service (Ics)<\/strong> \u2013 Un pourcentage de Icu, indiquant la quantit\u00e9 de courant de d\u00e9faut que le disjoncteur peut g\u00e9rer de mani\u00e8re r\u00e9p\u00e9t\u00e9e sans dommage.<\/li><\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Measuring_Breaking_Capacity\"><\/span>Mesure du pouvoir de coupure<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Ce qui d\u00e9termine le pouvoir de coupure ou la fa\u00e7on dont il est mesur\u00e9 en kiloamp\u00e8res (kA) varie en fonction du syst\u00e8me \u00e9lectrique, comme r\u00e9sum\u00e9 ci-dessous :<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong>Application<\/strong><\/td><td><strong>Capacit\u00e9 de rupture<\/strong><\/td><\/tr><tr><td>Maisons r\u00e9sidentielles<\/td><td>6 kA \u2013 10 kA<\/td><\/tr><tr><td>B\u00e2timents commerciaux<\/td><td>25 kA \u2013 50 kA<\/td><\/tr><tr><td>Installations industrielles<\/td><td>50 kA \u2013 100 kA<\/td><\/tr><tr><td>centrales \u00e9lectriques<\/td><td>100 kA+<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Choisir le bon pouvoir de coupure est crucial pour \u00e9viter les pannes \u00e9lectriques catastrophiques.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Why_Breaking_Capacity_Matters_in_Electrical_Safety\"><\/span>Pourquoi le pouvoir de coupure est important en mati\u00e8re de s\u00e9curit\u00e9 \u00e9lectrique<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Un court-circuit de disjoncteur peut entra\u00eener de graves dommages si le pouvoir de coupure est insuffisant. Voici quelques risques majeurs\u00a0:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>Incendies \u00e9lectriques<\/strong> \u2013 Des courants de d\u00e9faut \u00e9lev\u00e9s peuvent provoquer une surchauffe, entra\u00eenant des risques d\u2019incendie.<\/li><li><strong>Dommages mat\u00e9riels<\/strong> \u2013 Les transformateurs, les moteurs et le c\u00e2blage peuvent subir des dommages irr\u00e9parables.<\/li><li><strong>Risques pour la s\u00e9curit\u00e9<\/strong> \u2013 Si un disjoncteur ne parvient pas \u00e0 interrompre un courant excessif, cela peut entra\u00eener des chocs \u00e9lectriques ou des explosions.<\/li><\/ul>\n\n\n\n<p>Il est essentiel pour la s\u00e9curit\u00e9 de garantir que la capacit\u00e9 de coupure d&#039;un disjoncteur correspond au courant de d\u00e9faut potentiel du syst\u00e8me.<\/p>\n\n\n\n<p>Utilisation de haute qualit\u00e9 <a href=\"https:\/\/www.tosunlux.eu\/fr\/molded-case-circuit-breaker\/\" target=\"_blank\" rel=\"noreferrer noopener\">disjoncteurs de court-circuit<\/a> est une solution optimale.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_to_Select_the_Right_Circuit_Breaker_Based_on_Breaking_Capacity\"><\/span>Comment choisir le bon disjoncteur en fonction de son pouvoir de coupure<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Lors du choix d\u2019un disjoncteur, suivez ces \u00e9tapes\u00a0:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Step_1_Determine_the_Systems_Short-Circuit_Current\"><\/span>\u00c9tape #1\u00a0: D\u00e9terminer le courant de court-circuit du syst\u00e8me<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Utilisez la capacit\u00e9 du transformateur, la longueur du c\u00e2ble et l\u2019imp\u00e9dance pour calculer le courant de court-circuit maximal dans votre syst\u00e8me.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Step_2_Match_the_Breakers_Breaking_Capacity\"><\/span>\u00c9tape #2\u00a0:\u00a0Adapter le pouvoir de coupure du disjoncteur<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>S\u00e9lectionnez un disjoncteur avec un pouvoir de coupure sup\u00e9rieur au courant de d\u00e9faut attendu.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Step_3_Consider_System_Voltage_and_Application\"><\/span>\u00c9tape #3\u00a0: Tenir compte de la tension du syst\u00e8me et de l\u2019application<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\"><li>Pour les syst\u00e8mes r\u00e9sidentiels, un disjoncteur de 6 kA \u00e0 10 kA est suffisant.<\/li><li>Pour une utilisation industrielle, 50 kA+ peuvent \u00eatre n\u00e9cessaires.<\/li><\/ul>\n\n\n\n<p>Une s\u00e9lection appropri\u00e9e garantit que le disjoncteur peut d\u00e9connecter le circuit en toute s\u00e9curit\u00e9 dans des conditions extr\u00eames.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img decoding=\"async\" src=\"https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2025\/03\/DSC_5053-1024x683.webp\" alt=\"\" class=\"wp-image-12884\" width=\"479\" height=\"319\" srcset=\"https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2025\/03\/DSC_5053-1024x683.webp 1024w, https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2025\/03\/DSC_5053-300x200.webp 300w, https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2025\/03\/DSC_5053-768x512.webp 768w, https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2025\/03\/DSC_5053-1536x1025.webp 1536w, https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2025\/03\/DSC_5053-18x12.webp 18w, https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2025\/03\/DSC_5053.webp 2000w\" sizes=\"(max-width: 479px) 100vw, 479px\" \/><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Impact_of_Breaking_Capacity_on_System_Coordination\"><\/span>Impact de la capacit\u00e9 de rupture sur la coordination du syst\u00e8me<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Le pouvoir de coupure joue un r\u00f4le crucial dans la coordination du syst\u00e8me, en particulier dans les r\u00e9seaux \u00e9lectriques \u00e0 plusieurs niveaux.&nbsp;<\/p>\n\n\n\n<p>Les disjoncteurs doivent \u00eatre s\u00e9lectionn\u00e9s non seulement en fonction de leur capacit\u00e9 \u00e0 interrompre les courants de d\u00e9faut, mais \u00e9galement pour garantir leur coordination avec les dispositifs de protection en amont et en aval.<\/p>\n\n\n\n<p>Une coordination ad\u00e9quate permet aux disjoncteurs plus petits de se d\u00e9clencher avant les disjoncteurs plus grands en amont, minimisant ainsi les interruptions de service et prot\u00e9geant l&#039;ensemble du syst\u00e8me.&nbsp;<\/p>\n\n\n\n<p>Ce processus, connu sous le nom de coordination s\u00e9lective, garantit que seule la partie du circuit affect\u00e9e par le d\u00e9faut est d\u00e9connect\u00e9e, am\u00e9liorant ainsi la fiabilit\u00e9 du syst\u00e8me.<\/p>\n\n\n\n<p>Lors de la conception d&#039;un syst\u00e8me \u00e9lectrique, les ing\u00e9nieurs doivent calculer les courants de d\u00e9faut \u00e0 chaque niveau et choisir des disjoncteurs dont les capacit\u00e9s de coupure correspondent \u00e0 la hi\u00e9rarchie de protection du syst\u00e8me.&nbsp;<\/p>\n\n\n\n<p>Cela garantit que les d\u00e9fauts sont isol\u00e9s sans affecter l\u2019ensemble du r\u00e9seau.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"FAQs_About_Breaking_Capacity_and_Circuit_Breaker_Ratings\"><\/span>FAQ sur le pouvoir de coupure et les caract\u00e9ristiques nominales des disjoncteurs<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Determines_a_Circuits_Capacity\"><\/span>Qu&#039;est-ce qui d\u00e9termine la capacit\u00e9 d&#039;un circuit ?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>La capacit\u00e9 d&#039;un circuit d\u00e9pend de la tension, de la demande de courant et du courant de court-circuit maximal qu&#039;il peut supporter. Ces facteurs aident \u00e0 choisir un disjoncteur aux caract\u00e9ristiques nominales adapt\u00e9es.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Happens_if_a_Breakers_Breaking_Capacity_is_Too_Low\"><\/span>Que se passe-t-il si la capacit\u00e9 de coupure d\u2019un disjoncteur est trop faible ?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Si le courant de d\u00e9faut d\u00e9passe la capacit\u00e9 de coupure du disjoncteur, celui-ci peut ne pas se d\u00e9clencher, ce qui peut entra\u00eener de graves risques \u00e9lectriques tels qu&#039;un incendie ou des explosions.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_is_Breaking_Capacity_of_a_Circuit_Breaker_Calculated\"><\/span>Comment est calcul\u00e9 le pouvoir de coupure d&#039;un disjoncteur ?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Le pouvoir de coupure est calcul\u00e9 en fonction du courant de court-circuit du syst\u00e8me en utilisant :<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/lh7-rt.googleusercontent.com\/docsz\/AD_4nXfQeh15B9yDf3rtIXzyTG8SCbbF0ipsBmP0HORCjro1OWLl4PiGrCGpkWf5EI0SdB4exXrS-Ya1aSzf76IF8OOAkh6VV6XP202_KwvETA-8BF5zdszvMa2zCSqdHECUd3kQb1H2HA?key=qYAtXo96UhMBtmX43YMG1lYb\" alt=\"\"\/><\/figure>\n\n\n\n<p>o\u00f9 Isc est le courant de court-circuit, V est la tension du syst\u00e8me et Z est l&#039;imp\u00e9dance totale du syst\u00e8me.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Is_a_Higher_Breaking_Capacity_Always_Better\"><\/span>Un pouvoir de coupure plus \u00e9lev\u00e9 est-il toujours meilleur ?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Pas n\u00e9cessairement. Les disjoncteurs \u00e0 pouvoir de coupure plus \u00e9lev\u00e9 sont plus chers et peuvent s&#039;av\u00e9rer inutiles pour les syst\u00e8mes \u00e0 faible courant de d\u00e9faut. Il est pr\u00e9f\u00e9rable d&#039;adapter le pouvoir du disjoncteur aux exigences du syst\u00e8me.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_Often_Should_Circuit_Breakers_Be_Tested_for_Breaking_Capacity\"><\/span>\u00c0 quelle fr\u00e9quence les disjoncteurs doivent-ils \u00eatre test\u00e9s pour d\u00e9terminer leur pouvoir de coupure\u00a0?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Des tests r\u00e9guliers tous les 1 \u00e0 3 ans garantissent le bon fonctionnement du disjoncteur en cas de d\u00e9faut. Les industries utilisant des \u00e9quipements de forte puissance devraient effectuer des tests plus fr\u00e9quemment.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Breaking_Capacity_vs_Circuit_Breaker_Rating_Conclusion\"><\/span>Pouvoir de coupure vs. Calibre du disjoncteur\u00a0: Conclusion<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Bien que le pouvoir de coupure soit un \u00e9l\u00e9ment essentiel des valeurs nominales des disjoncteurs, ils ne sont pas identiques.&nbsp;<\/p>\n\n\n\n<p>La capacit\u00e9 d&#039;interruption des disjoncteurs fait r\u00e9f\u00e9rence au courant de d\u00e9faut maximal qu&#039;un disjoncteur peut interrompre, tandis que les valeurs nominales des disjoncteurs d\u00e9finissent plusieurs param\u00e8tres op\u00e9rationnels.&nbsp;<\/p>\n\n\n\n<p>La compr\u00e9hension de ces deux aspects garantit la s\u00e9curit\u00e9 \u00e9lectrique, la protection ad\u00e9quate des \u00e9quipements et la conformit\u00e9 aux normes de l\u2019industrie.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Resources\"><\/span>Ressources:<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><a href=\"https:\/\/onccy.com\/understanding-circuit-breaker-short-circuit-breaking-capacity-and-how-to-select-it\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">Pouvoir de coupure en court-circuit d&#039;un disjoncteur et comment le s\u00e9lectionner<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/www.se.com\/eg\/en\/faqs\/FA228821\/#:~:text=The%20rated%20breaking%20capacity%20(Icu,Icu)%20of%20the%20circuit%20breaker.\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">Quelle est la capacit\u00e9 de coupure du service<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/www.linkedin.com\/pulse\/what-breaking-capacity-circuit-breaker-how-choose-bindy-hu\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">Quel est le pouvoir de coupure du disjoncteur<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/www.electrical-installation.org\/enwiki\/Fundamental_characteristics_of_a_circuit-breaker\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">Caract\u00e9ristiques fondamentales d&#039;un disjoncteur<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/testbook.com\/electrical-engineering\/rating-of-circuit-breakers\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">Calibre du disjoncteur<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/forums.mikeholt.com\/threads\/difference-between-short-circuit-rating-and-ultimate-breaking-rating-icu.2558753\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">Diff\u00e9rence entre le pouvoir de coupure en court-circuit et le pouvoir de coupure ultime (ICU)<\/a><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>Breaking capacity and circuit breaker ratings are often confused, but they serve different purposes in electrical systems.&nbsp; Breaking capacity refers to the maximum fault that can safely interrupt, while circuit breaker ratings cover multiple specifications like voltage, current, and interrupting capacity of circuit breakers.&nbsp; Selecting the correct breaker requires an understanding of both.&nbsp; In this guide, we\u2019ll break down their differences and why both are critical for electrical safety. Key Differences Between Breaking Capacity and Circuit Breaker Ratings Aspect Circuit Breaker Ratings Breaking Capacity Definition The complete set of electrical specifications of a breaker. The maximum fault current is the one the breaker can safely interrupt. Unit of Measurement Amperes (A) for current, Volts (V) for voltage. Kiloamperes (kA) for short-circuit current. Purpose Defines how a breaker operates under normal conditions. Determines the breaker&#8217;s ability to handle fault conditions. Importance Ensures correct sizing and protection for circuits. Prevents damage during short circuits and ensures system safety. Understanding these differences helps in selecting the right circuit breaker for any electrical application. Understanding Circuit Breaker Ratings A circuit breaker rating is a set of electrical parameters that determine how a breaker operates under normal and fault conditions. These ratings ensure that a breaker functions effectively within its designed limits. The key specifications include: Rated Current (In) This is the continuous current a breaker can carry without tripping. It is measured in amperes (A) and typically ranges from 1A to several thousand amperes, depending on the breaker type. Rated Voltage (Ue) This defines the maximum system voltage at [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":12883,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[209],"tags":[],"class_list":["post-12811","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-circuit-breaker"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Breaking Capacity vs. Circuit Breaker Ratings: Are They The Same? | TOSUNlux<\/title>\n<meta name=\"description\" content=\"Confused about breaking capacity vs. circuit breaker ratings? 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