{"id":12277,"date":"2025-01-11T10:38:00","date_gmt":"2025-01-11T02:38:00","guid":{"rendered":"https:\/\/www.tosunlux.eu\/?p=12277"},"modified":"2025-01-13T11:27:58","modified_gmt":"2025-01-13T03:27:58","slug":"the-interrupt-capacity-of-circuit-breakers","status":"publish","type":"post","link":"https:\/\/www.tosunlux.eu\/it\/blog\/the-interrupt-capacity-of-circuit-breakers\/","title":{"rendered":"Qual \u00e8 la capacit\u00e0 di interruzione di un interruttore automatico?"},"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\" >Indice dei contenuti<\/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=\"Attiva\/disattiva la tabella dei contenuti\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Attiva\/disattiva<\/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\/it\/blog\/the-interrupt-capacity-of-circuit-breakers\/#What_is_Interrupt_Capacity\" title=\"Che cosa si intende per capacit\u00e0 di interruzione?\">Che cosa si intende per capacit\u00e0 di interruzione?<\/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\/it\/blog\/the-interrupt-capacity-of-circuit-breakers\/#What_Determines_a_Circuits_Capacity\" title=\"Cosa determina la capacit\u00e0 di un circuito?\">Cosa determina la capacit\u00e0 di un circuito?<\/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\/it\/blog\/the-interrupt-capacity-of-circuit-breakers\/#Conductor_Size\" title=\"Dimensioni del conduttore\">Dimensioni del conduttore<\/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\/it\/blog\/the-interrupt-capacity-of-circuit-breakers\/#Breaker_Type\" title=\"Tipo di interruttore\">Tipo di interruttore<\/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\/it\/blog\/the-interrupt-capacity-of-circuit-breakers\/#System_Voltage_and_Load\" title=\"Tensione e carico del sistema\">Tensione e carico del sistema<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.tosunlux.eu\/it\/blog\/the-interrupt-capacity-of-circuit-breakers\/#Interrupting_Capacities_of_Circuit_Breakers\" title=\"Capacit\u00e0 di interruzione degli interruttori automatici\">Capacit\u00e0 di interruzione degli interruttori automatici<\/a><\/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\/it\/blog\/the-interrupt-capacity-of-circuit-breakers\/#How_to_Calculate_the_Required_Interrupt_Rating\" title=\"Come calcolare il valore di interruzione richiesto\">Come calcolare il valore di interruzione richiesto<\/a><\/li><\/ul><\/nav><\/div>\n\n<p>La capacit\u00e0 di interruzione di un interruttore automatico \u00e8 la sua capacit\u00e0 di scollegare in modo sicuro un circuito guasto interrompendo un cortocircuito o una corrente di sovraccarico.&nbsp;<\/p>\n\n\n\n<p>Questa classificazione \u00e8 essenziale per selezionare l&#039;interruttore giusto per un sistema, garantire la sicurezza e prevenire danni.&nbsp;<\/p>\n\n\n\n<p>Conoscere i valori nominali di interruzione aiuta a evitare guasti catastrofici abbinando gli interruttori ai livelli di corrente di guasto specifici di un&#039;installazione elettrica.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_is_Interrupt_Capacity\"><\/span>Che cosa si intende per capacit\u00e0 di interruzione?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>La capacit\u00e0 di interruzione si riferisce alla quantit\u00e0 massima di corrente di guasto che un interruttore pu\u00f2 interrompere in sicurezza senza subire danni o rappresentare un pericolo per l&#039;impianto elettrico.&nbsp;<\/p>\n\n\n\n<p>Quando si verifica un cortocircuito o un sovraccarico, la funzione principale dell&#039;interruttore \u00e8 quella di isolare il circuito difettoso dal sistema.&nbsp;<\/p>\n\n\n\n<p>Se la corrente di guasto supera la capacit\u00e0 di interruzione dell&#039;interruttore, quest&#039;ultimo potrebbe non aprirsi correttamente, causando condizioni pericolose come incendi elettrici o danni alle apparecchiature.<\/p>\n\n\n\n<p>Questa potenza nominale \u00e8 solitamente espressa in kiloampere (kA) e rappresenta un fattore cruciale nella scelta degli interruttori automatici.&nbsp;<\/p>\n\n\n\n<p>Un interruttore con una maggiore capacit\u00e0 di interruzione \u00e8 progettato per gestire correnti di guasto pi\u00f9 consistenti.&nbsp;<\/p>\n\n\n\n<p>Ad esempio, un interruttore con corrente nominale di 10 kA pu\u00f2 interrompere in modo sicuro correnti di guasto fino a 10.000 ampere.&nbsp;<\/p>\n\n\n\n<p>Scegliendo un interruttore con un&#039;adeguata capacit\u00e0 di interruzione si garantisce che, in caso di guasto, l&#039;interruttore scatti rapidamente per proteggere il sistema, riducendo il rischio di danni o incendi.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Determines_a_Circuits_Capacity\"><\/span>Cosa determina la capacit\u00e0 di un circuito?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>La capacit\u00e0 di un circuito si riferisce alla quantit\u00e0 di corrente che pu\u00f2 gestire in sicurezza senza surriscaldarsi o subire danni permanenti.&nbsp;<\/p>\n\n\n\n<p>Diversi fattori determinano la capacit\u00e0 di un circuito, tra cui le dimensioni del conduttore, la tensione del sistema, il tipo di interruttore e la progettazione complessiva del sistema.&nbsp;<\/p>\n\n\n\n<p>Gli impianti elettrici correttamente progettati saranno dotati di interruttori automatici dimensionati per gestire la massima corrente di guasto potenziale che potrebbe verificarsi.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Conductor_Size\"><\/span>Dimensioni del conduttore<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Conduttori pi\u00f9 grandi consentono il passaggio di una maggiore corrente nel circuito senza surriscaldarlo, aumentando la capacit\u00e0 complessiva del circuito.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Breaker_Type\"><\/span>Tipo di interruttore<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Diversi tipi di interruttori, come MCB, MCCB e ACB, hanno diverse capacit\u00e0 di interruzione. Il tipo di interruttore scelto deve corrispondere alle esigenze specifiche del sistema.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"System_Voltage_and_Load\"><\/span>Tensione e carico del sistema<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>I sistemi ad alta tensione richiedono interruttori con capacit\u00e0 di interruzione pi\u00f9 elevate.&nbsp;<\/p>\n\n\n\n<p>Il carico massimo sul circuito influenza il valore di interruzione richiesto, poich\u00e9 un carico maggiore aumenta la possibilit\u00e0 di cortocircuiti o sovracorrenti.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Interrupting_Capacities_of_Circuit_Breakers\"><\/span>Capacit\u00e0 di interruzione degli interruttori automatici<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong>Tipo di interruttore automatico<\/strong><\/td><td><strong>Capacit\u00e0 di interruzione tipica<\/strong><\/td><td><strong>Applicazione<\/strong><\/td><\/tr><tr><td><a href=\"https:\/\/www.tosunlux.eu\/it\/molded-case-circuit-breaker\/\">MCCB (interruttore automatico in scatola stampata)<\/a><\/td><td>10 kA, 25 kA, 65 kA<\/td><td>Uso industriale, commerciale e residenziale; protegge da sovraccarichi e cortocircuiti.<\/td><\/tr><tr><td><a href=\"https:\/\/www.tosunlux.eu\/it\/miniature-circuit-breaker\/\">MCB (interruttore automatico in miniatura)<\/a><\/td><td>6kA, 10kA<\/td><td>Uso residenziale e commerciale leggero; adatto per correnti di guasto inferiori.<\/td><\/tr><tr><td>ACB (interruttore automatico)<\/td><td>da 10 kA a 85 kA<\/td><td>Applicazioni industriali; gestisce correnti di guasto pi\u00f9 elevate.<\/td><\/tr><tr><td>VCB (interruttore automatico del vuoto)<\/td><td>da 25 kA a 40 kA<\/td><td>Sistemi di media tensione; ideali per la protezione di trasformatori e linee di distribuzione.<\/td><\/tr><tr><td>Interruttore automatico SF\u2086<\/td><td>100 kA e oltre<\/td><td>Applicazioni ad alta tensione; utilizzato in sottostazioni e centrali elettriche.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_to_Calculate_the_Required_Interrupt_Rating\"><\/span>Come calcolare il valore di interruzione richiesto<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Per garantire che l&#039;interruttore automatico selezionato sia adatto al sistema, \u00e8 necessario calcolare la capacit\u00e0 di interruzione richiesta.&nbsp;<\/p>\n\n\n\n<p>Ci\u00f2 comporta la determinazione della massima corrente di guasto che potrebbe verificarsi nel sistema.<\/p>\n\n\n\n<p><strong>Fase 1: identificare la corrente di guasto<\/strong>: Iniziare identificando il livello di guasto e l&#039;impedenza del trasformatore.<\/p>\n\n\n\n<p><strong>Fase 2: calcolare la corrente di cortocircuito presunta<\/strong>: Utilizzare la configurazione del sistema per calcolare la massima corrente di guasto che potrebbe derivare da un cortocircuito.<\/p>\n\n\n\n<p><strong>Passaggio 3: selezionare l&#039;interruttore<\/strong>: Per garantire la protezione, adattare la corrente nominale di interruzione dell&#039;interruttore in modo che superi la corrente di guasto calcolata.<\/p>\n\n\n\n<p>Nelle installazioni complesse, gli strumenti software possono facilitare calcoli precisi, garantendo la corretta selezione dell&#039;interruttore.<\/p>\n\n\n\n\n  <style>\n\t\t\t.module {\n\t\t\t\tmargin: 10px 0 30px 0;\n\t\t\t\twidth: 100%;\n\t\t\t\ttext-align: left;\n\t\t\t}\n\t\t\t\/* \u6807\u9898 *\/\n\t\t\t.module .module-title {\n\t\t\t\tfont-size: 18px;\n\t\t\t\tdisplay: flex;\n\t\t\t\talign-items: center;\n\t\t\t}\n\n\t\t\t.module .module-button {\n\t\t\t\tcursor: pointer;\n\t\t\t\tborder: 0px;\n\t\t\t\ttext-align: center;\n\t\t\t\tmargin-left: 10px;\n\t\t\t\tbackground: none;\n\t\t\t}\n\n\t\t\t.module .module-content {\n\t\t\t\tdisplay: none;\n\t\t\t}\n\n\t\t\t.module .module-content.show 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height='18'>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<!-- \u4fee\u6539\u56fe\u6807\u5927\u5c0f\u8bf7\u5728width\u548cheight\u4e2d\u6539 -->\n\t\t\t\t\t\t<path\n\t\t\t\t\t\t\td='M511.602721 1023.001027a511.474051 511.474051 0 1 1 360.629164-148.84694 509.476105 509.476105 0 0 1-360.629164 149.845913z m0-941.032335c-109.887003 0-220.772979 41.956856-304.686691 125.870567-167.827423 168.826396-167.827423 441.545958 0 609.373381s440.546985 167.827423 609.373381 0c167.827423-167.827423 167.827423-440.546985 0-609.373381-83.913711-82.914739-194.799687-124.871594-304.68669-124.871595z m332.657927 763.215185z'\n\t\t\t\t\t\t\tfill=' #00b1cdbd' p-id='2000'><\/path>\n\t\t\t\t\t\t\t<!-- \u4fee\u6539\u56fe\u6807\u989c\u8272\u8bf7\u5728fill\u4e2d\u6539 -->\n\t\t\t\t\t\t<path\n\t\t\t\t\t\t\td='M780.326392 552.484859H241.880077a39.95891 39.95891 0 0 1 0-79.91782h538.446315a39.95891 39.95891 0 0 1 0 79.91782z'\n\t\t\t\t\t\t\tfill=' #00b1cdbd' p-id='2001'><\/path>\n\t\t\t\t\t\t\t<!-- \u4fee\u6539\u56fe\u6807\u989c\u8272\u8bf7\u5728fill\u4e2d\u6539 -->\n\t\t\t\t\t<\/svg>\n\t\t\t\t<\/button>\n\t\t\t<\/div>\n\t\t\t<div class='module-content'>\n\t\t\t\t<div class='d1' style='background-color: #00b1cdbd'>\n\t\t\t\t\t<!-- \u8fd9\u662f\u6587\u5b57\u7b80\u4ecb -->\n\t\t\t\t\t<span style='font-size:18px'>TOSUNlux utilizza solo fonti di alta qualit\u00e0, tra cui studi sottoposti a revisione paritaria, per supportare i fatti nei nostri articoli. Il nostro impegno per l&#039;accuratezza e l&#039;affidabilit\u00e0 garantisce che i lettori ricevano informazioni ben documentate di cui possono fidarsi.\r\n\t\t\t\t<\/span>\n\t\t\t\t<\/div>\n\t\t\t\t<ul class='d2'>\n\t\t\t\t\n  <li style='list-style: decimal;font-size:18px;'><a class='aaa a2' target='_blank' href='https:\/\/ewh.ieee.org\/r6\/san_francisco\/ias\/archive\/pdf\/archived_presentations\/Interrupting_Capacity.pdf'>Capacit\u00e0 di interruzione dell&#039;interruttore automatico<\/a><\/li>\n  \n\t\t\t\t<\/ul>\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t<script>\n\t\t\tconst moduleButtons = document.querySelectorAll('.module-button');\n\t\t\tconst svg1 = document.getElementById('svg-1');\n\t\t\tconst svg2 = document.getElementById('svg-2');\n\t\t\tfor (const button of moduleButtons) {\n\t\t\t\tbutton.addEventListener('click', function() {\n\t\t\t\t\tconst content = this.parentNode.nextElementSibling;\n\t\t\t\t\tcontent.classList.toggle('show');\n\t\t\t\t\tconst svg = this.querySelector('svg');\n\t\t\t\t\tconst plusPath = svg.querySelector('#plus');\n\t\t\t\t});\n\t\t\t\tsvg1.addEventListener('click', function() {\n\t\t\t\t\tsvg1.style.display = 'none';\n\t\t\t\t\tsvg2.style.display = 'block';\n\t\t\t\t});\n\n\t\t\t\tsvg2.addEventListener('click', function() {\n\t\t\t\t\tsvg2.style.display = 'none';\n\t\t\t\t\tsvg1.style.display = 'block';\n\t\t\t\t});\n\t\t\t}\n\t\t<\/script>\n\n  \n  <style>\n\t\t\t.module {\n\t\t\t\tmargin: 10px 0 30px 0;\n\t\t\t\twidth: 100%;\n\t\t\t\ttext-align: left;\n\t\t\t}\n\t\t\t\/* \u6807\u9898 *\/\n\t\t\t.module .module-title {\n\t\t\t\tfont-size: 18px;\n\t\t\t\tdisplay: flex;\n\t\t\t\talign-items: center;\n\t\t\t}\n\n\t\t\t.module .module-button {\n\t\t\t\tcursor: pointer;\n\t\t\t\tborder: 0px;\n\t\t\t\ttext-align: center;\n\t\t\t\tmargin-left: 10px;\n\t\t\t\tbackground: none;\n\t\t\t}\n\n\t\t\t.module .module-content {\n\t\t\t\tdisplay: none;\n\t\t\t}\n\n\t\t\t.module .module-content.show {\n\t\t\t\tdisplay: block;\n\t\t\t}\n\t\t\t\/* \u7b2c\u4e00\u5757\u5185\u5bb9 *\/\n\t\t\t.module .d1 {\n\t\t\t\twidth: 95%;\n\t\t\t\t\/* \u80cc\u666f\u989c\u8272 *\/\n\t\t\t\tpadding: 1% 2.5% 1% 2.5%;\n\t\t\t\tmargin-top: 3%;\n\t\t\t}\n\t\t\t\/* \u7b2c\u4e8c\u5757\u5185\u5bb9 *\/\n\t\t\t.module .d2 {\n\t\t\t\twidth: 95%;\n\t\t\t\tpadding: 3% 2.5% 3% 2.5%;\n\t\t\t}\n            \/* \u6240\u6709a\u94fe\u63a5\u4e0a\u6587\u5b57 *\/\n            .module .aaa {\n\t\t\t\t\/* \u989c\u8272 *\/\n\t\t\t\tcolor:  #00b1cdbd;\n\t\t\t\t\/* \u6587\u5b57\u4e0b\u5212\u7ebf *\/\n\t\t\t\ttext-decoration: underline;\n\t\t\t}\n\t\t\t\/* \u4e0b\u65b9\u659c\u4f53\u6587\u5b57 *\/\n\t\t\t.module .a2 {\n\t\t\t\t\/* \u659c\u4f53 *\/\n\t\t\t\tfont-style: italic;\n\t\t\t}\n\t\t\t\/* \u6240\u6709a\u94fe\u63a5\u4e0a\u6587\u5b57\u60ac\u6d6e\u53d8\u8272 *\/\n\t\t\t.module .aaa:hover {\n\t\t\t\t\/* \u989c\u8272 *\/\n\t\t\t\tcolor: #D3CCFF;\n\t\t\t}\n\t\t<\/style>\n  <div class='module'>\n\t\t\t<div class='module-title' style='font-size: 18px;'>\n\t\t\t\t<!-- \u8fd9\u662f\u6807\u9898 -->\n\t\t\t\tFonti dell&#039;articolo\n\t\t\t\t<button class='module-button'>\n\t\t\t\t\t<svg id='svg-1' style='display:block' t='1710230154863' class='icon' viewbox='0 0 1026 1024'\n\t\t\t\t\t\tversion='1.1' xmlns='http:\/\/www.w3.org\/2000\/svg' p-id='1843' width='18' height='18'>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<!-- \u4fee\u6539\u56fe\u6807\u5927\u5c0f\u8bf7\u5728width\u548cheight\u4e2d\u6539 -->\n\t\t\t\t\t\t<path\n\t\t\t\t\t\t\td='M511.602721 1023.001027a511.474051 511.474051 0 1 1 360.629164-148.84694 509.476105 509.476105 0 0 1-360.629164 149.845913z m0-941.032335c-109.887003 0-220.772979 41.956856-304.686691 125.870567-167.827423 168.826396-167.827423 441.545958 0 609.373381s440.546985 167.827423 609.373381 0c167.827423-167.827423 167.827423-440.546985 0-609.373381-83.913711-82.914739-194.799687-124.871594-304.68669-124.871595z m332.657927 763.215185z'\n\t\t\t\t\t\t\tfill=' #00b1cdbd' p-id='1844'><\/path>\n\t\t\t\t\t\t\t<!-- \u4fee\u6539\u56fe\u6807\u989c\u8272\u8bf7\u5728fill\u4e2d\u6539 -->\n\t\t\t\t\t\t<path\n\t\t\t\t\t\t\td='M780.326392 552.484859H241.880077a39.95891 39.95891 0 0 1 0-79.91782h538.446315a39.95891 39.95891 0 0 1 0 79.91782z'\n\t\t\t\t\t\t\tfill=' #00b1cdbd' p-id='1845'><\/path>\n\t\t\t\t\t\t\t<!-- \u4fee\u6539\u56fe\u6807\u989c\u8272\u8bf7\u5728fill\u4e2d\u6539 -->\n\t\t\t\t\t\t<path\n\t\t\t\t\t\t\td='M511.602721 822.207503a39.95891 39.95891 0 0 1-39.958911-39.95891V243.802278a39.95891 39.95891 0 1 1 79.917821 0v538.446315a39.95891 39.95891 0 0 1-39.95891 39.95891z'\n\t\t\t\t\t\t\tfill=' #00b1cdbd' p-id='1846'><\/path>\n\t\t\t\t\t\t\t<!-- \u4fee\u6539\u56fe\u6807\u989c\u8272\u8bf7\u5728fill\u4e2d\u6539 -->\n\t\t\t\t\t<\/svg>\n\t\t\t\t\t<svg id='svg-2' style='display:none' t='1710230227147' class='icon' viewbox='0 0 1026 1024'\n\t\t\t\t\t\tversion='1.1' xmlns='http:\/\/www.w3.org\/2000\/svg' p-id='1999' width='18' height='18'>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<!-- \u4fee\u6539\u56fe\u6807\u5927\u5c0f\u8bf7\u5728width\u548cheight\u4e2d\u6539 -->\n\t\t\t\t\t\t<path\n\t\t\t\t\t\t\td='M511.602721 1023.001027a511.474051 511.474051 0 1 1 360.629164-148.84694 509.476105 509.476105 0 0 1-360.629164 149.845913z m0-941.032335c-109.887003 0-220.772979 41.956856-304.686691 125.870567-167.827423 168.826396-167.827423 441.545958 0 609.373381s440.546985 167.827423 609.373381 0c167.827423-167.827423 167.827423-440.546985 0-609.373381-83.913711-82.914739-194.799687-124.871594-304.68669-124.871595z m332.657927 763.215185z'\n\t\t\t\t\t\t\tfill=' #00b1cdbd' p-id='2000'><\/path>\n\t\t\t\t\t\t\t<!-- \u4fee\u6539\u56fe\u6807\u989c\u8272\u8bf7\u5728fill\u4e2d\u6539 -->\n\t\t\t\t\t\t<path\n\t\t\t\t\t\t\td='M780.326392 552.484859H241.880077a39.95891 39.95891 0 0 1 0-79.91782h538.446315a39.95891 39.95891 0 0 1 0 79.91782z'\n\t\t\t\t\t\t\tfill=' #00b1cdbd' p-id='2001'><\/path>\n\t\t\t\t\t\t\t<!-- \u4fee\u6539\u56fe\u6807\u989c\u8272\u8bf7\u5728fill\u4e2d\u6539 -->\n\t\t\t\t\t<\/svg>\n\t\t\t\t<\/button>\n\t\t\t<\/div>\n\t\t\t<div class='module-content'>\n\t\t\t\t<div class='d1' style='background-color: #00b1cdbd'>\n\t\t\t\t\t<!-- \u8fd9\u662f\u6587\u5b57\u7b80\u4ecb -->\n\t\t\t\t\t<span style='font-size:18px'>TOSUNlux utilizza solo fonti di alta qualit\u00e0, tra cui studi sottoposti a revisione paritaria, per supportare i fatti nei nostri articoli. Il nostro impegno per l&#039;accuratezza e l&#039;affidabilit\u00e0 garantisce che i lettori ricevano informazioni ben documentate di cui possono fidarsi.\r\n\t\t\t\t<\/span>\n\t\t\t\t<\/div>\n\t\t\t\t<ul class='d2'>\n\t\t\t\t\n  <li style='list-style: decimal;font-size:18px;'><a class='aaa a2' target='_blank' href='https:\/\/ewh.ieee.org\/r6\/san_francisco\/ias\/archive\/pdf\/archived_presentations\/Interrupting_Capacity.pdf'>Capacit\u00e0 di interruzione dell&#039;interruttore automatico<\/a><\/li>\n  \n  <li style='list-style: decimal;font-size:18px;'><a class='aaa a2' target='_blank' href='https:\/\/www.eaton.com\/content\/dam\/eaton\/products\/electrical-circuit-protection\/fuses\/solution-center\/bus-ele-tech-lib-interrupting-capacity-vs-interrupting-rating.pdf'>Applicazione del valore di interruzione: interruttori automatici<\/a><\/li>\n  \n  <li style='list-style: decimal;font-size:18px;'><a class='aaa a2' target='_blank' href='https:\/\/www.se.com\/us\/en\/faqs\/FA93276\/'>Cosa significa Ampere Interrupting Rating su un circuito<\/a><\/li>\n  \n\t\t\t\t<\/ul>\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t<script>\n\t\t\tconst moduleButtons = document.querySelectorAll('.module-button');\n\t\t\tconst svg1 = document.getElementById('svg-1');\n\t\t\tconst svg2 = document.getElementById('svg-2');\n\t\t\tfor (const button of moduleButtons) {\n\t\t\t\tbutton.addEventListener('click', function() {\n\t\t\t\t\tconst content = this.parentNode.nextElementSibling;\n\t\t\t\t\tcontent.classList.toggle('show');\n\t\t\t\t\tconst svg = this.querySelector('svg');\n\t\t\t\t\tconst plusPath = svg.querySelector('#plus');\n\t\t\t\t});\n\t\t\t\tsvg1.addEventListener('click', function() {\n\t\t\t\t\tsvg1.style.display = 'none';\n\t\t\t\t\tsvg2.style.display = 'block';\n\t\t\t\t});\n\n\t\t\t\tsvg2.addEventListener('click', function() {\n\t\t\t\t\tsvg2.style.display = 'none';\n\t\t\t\t\tsvg1.style.display = 'block';\n\t\t\t\t});\n\t\t\t}\n\t\t<\/script>\n\n  \n  <style>\n\t\t\t.module {\n\t\t\t\tmargin: 10px 0 30px 0;\n\t\t\t\twidth: 100%;\n\t\t\t\ttext-align: left;\n\t\t\t}\n\t\t\t\/* \u6807\u9898 *\/\n\t\t\t.module .module-title {\n\t\t\t\tfont-size: 18px;\n\t\t\t\tdisplay: flex;\n\t\t\t\talign-items: center;\n\t\t\t}\n\n\t\t\t.module .module-button {\n\t\t\t\tcursor: pointer;\n\t\t\t\tborder: 0px;\n\t\t\t\ttext-align: center;\n\t\t\t\tmargin-left: 10px;\n\t\t\t\tbackground: none;\n\t\t\t}\n\n\t\t\t.module .module-content {\n\t\t\t\tdisplay: none;\n\t\t\t}\n\n\t\t\t.module .module-content.show {\n\t\t\t\tdisplay: block;\n\t\t\t}\n\t\t\t\/* \u7b2c\u4e00\u5757\u5185\u5bb9 *\/\n\t\t\t.module .d1 {\n\t\t\t\twidth: 95%;\n\t\t\t\t\/* \u80cc\u666f\u989c\u8272 *\/\n\t\t\t\tpadding: 1% 2.5% 1% 2.5%;\n\t\t\t\tmargin-top: 3%;\n\t\t\t}\n\t\t\t\/* \u7b2c\u4e8c\u5757\u5185\u5bb9 *\/\n\t\t\t.module .d2 {\n\t\t\t\twidth: 95%;\n\t\t\t\tpadding: 3% 2.5% 3% 2.5%;\n\t\t\t}\n            \/* \u6240\u6709a\u94fe\u63a5\u4e0a\u6587\u5b57 *\/\n            .module .aaa {\n\t\t\t\t\/* \u989c\u8272 *\/\n\t\t\t\tcolor:  #00b1cdbd;\n\t\t\t\t\/* \u6587\u5b57\u4e0b\u5212\u7ebf *\/\n\t\t\t\ttext-decoration: underline;\n\t\t\t}\n\t\t\t\/* \u4e0b\u65b9\u659c\u4f53\u6587\u5b57 *\/\n\t\t\t.module .a2 {\n\t\t\t\t\/* \u659c\u4f53 *\/\n\t\t\t\tfont-style: italic;\n\t\t\t}\n\t\t\t\/* \u6240\u6709a\u94fe\u63a5\u4e0a\u6587\u5b57\u60ac\u6d6e\u53d8\u8272 *\/\n\t\t\t.module .aaa:hover {\n\t\t\t\t\/* \u989c\u8272 *\/\n\t\t\t\tcolor: #D3CCFF;\n\t\t\t}\n\t\t<\/style>\n  <div class='module'>\n\t\t\t<div class='module-title' style='font-size: 18px;'>\n\t\t\t\t<!-- \u8fd9\u662f\u6807\u9898 -->\n\t\t\t\tFonti dell&#039;articolo\n\t\t\t\t<button class='module-button'>\n\t\t\t\t\t<svg id='svg-1' style='display:block' t='1710230154863' class='icon' viewbox='0 0 1026 1024'\n\t\t\t\t\t\tversion='1.1' xmlns='http:\/\/www.w3.org\/2000\/svg' p-id='1843' width='18' height='18'>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<!-- \u4fee\u6539\u56fe\u6807\u5927\u5c0f\u8bf7\u5728width\u548cheight\u4e2d\u6539 -->\n\t\t\t\t\t\t<path\n\t\t\t\t\t\t\td='M511.602721 1023.001027a511.474051 511.474051 0 1 1 360.629164-148.84694 509.476105 509.476105 0 0 1-360.629164 149.845913z m0-941.032335c-109.887003 0-220.772979 41.956856-304.686691 125.870567-167.827423 168.826396-167.827423 441.545958 0 609.373381s440.546985 167.827423 609.373381 0c167.827423-167.827423 167.827423-440.546985 0-609.373381-83.913711-82.914739-194.799687-124.871594-304.68669-124.871595z m332.657927 763.215185z'\n\t\t\t\t\t\t\tfill=' #00b1cdbd' p-id='1844'><\/path>\n\t\t\t\t\t\t\t<!-- \u4fee\u6539\u56fe\u6807\u989c\u8272\u8bf7\u5728fill\u4e2d\u6539 -->\n\t\t\t\t\t\t<path\n\t\t\t\t\t\t\td='M780.326392 552.484859H241.880077a39.95891 39.95891 0 0 1 0-79.91782h538.446315a39.95891 39.95891 0 0 1 0 79.91782z'\n\t\t\t\t\t\t\tfill=' #00b1cdbd' p-id='1845'><\/path>\n\t\t\t\t\t\t\t<!-- \u4fee\u6539\u56fe\u6807\u989c\u8272\u8bf7\u5728fill\u4e2d\u6539 -->\n\t\t\t\t\t\t<path\n\t\t\t\t\t\t\td='M511.602721 822.207503a39.95891 39.95891 0 0 1-39.958911-39.95891V243.802278a39.95891 39.95891 0 1 1 79.917821 0v538.446315a39.95891 39.95891 0 0 1-39.95891 39.95891z'\n\t\t\t\t\t\t\tfill=' #00b1cdbd' p-id='1846'><\/path>\n\t\t\t\t\t\t\t<!-- \u4fee\u6539\u56fe\u6807\u989c\u8272\u8bf7\u5728fill\u4e2d\u6539 -->\n\t\t\t\t\t<\/svg>\n\t\t\t\t\t<svg id='svg-2' style='display:none' t='1710230227147' class='icon' viewbox='0 0 1026 1024'\n\t\t\t\t\t\tversion='1.1' xmlns='http:\/\/www.w3.org\/2000\/svg' p-id='1999' width='18' height='18'>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<!-- \u4fee\u6539\u56fe\u6807\u5927\u5c0f\u8bf7\u5728width\u548cheight\u4e2d\u6539 -->\n\t\t\t\t\t\t<path\n\t\t\t\t\t\t\td='M511.602721 1023.001027a511.474051 511.474051 0 1 1 360.629164-148.84694 509.476105 509.476105 0 0 1-360.629164 149.845913z m0-941.032335c-109.887003 0-220.772979 41.956856-304.686691 125.870567-167.827423 168.826396-167.827423 441.545958 0 609.373381s440.546985 167.827423 609.373381 0c167.827423-167.827423 167.827423-440.546985 0-609.373381-83.913711-82.914739-194.799687-124.871594-304.68669-124.871595z m332.657927 763.215185z'\n\t\t\t\t\t\t\tfill=' #00b1cdbd' p-id='2000'><\/path>\n\t\t\t\t\t\t\t<!-- \u4fee\u6539\u56fe\u6807\u989c\u8272\u8bf7\u5728fill\u4e2d\u6539 -->\n\t\t\t\t\t\t<path\n\t\t\t\t\t\t\td='M780.326392 552.484859H241.880077a39.95891 39.95891 0 0 1 0-79.91782h538.446315a39.95891 39.95891 0 0 1 0 79.91782z'\n\t\t\t\t\t\t\tfill=' #00b1cdbd' p-id='2001'><\/path>\n\t\t\t\t\t\t\t<!-- \u4fee\u6539\u56fe\u6807\u989c\u8272\u8bf7\u5728fill\u4e2d\u6539 -->\n\t\t\t\t\t<\/svg>\n\t\t\t\t<\/button>\n\t\t\t<\/div>\n\t\t\t<div class='module-content'>\n\t\t\t\t<div class='d1' style='background-color: #00b1cdbd'>\n\t\t\t\t\t<!-- \u8fd9\u662f\u6587\u5b57\u7b80\u4ecb -->\n\t\t\t\t\t<span style='font-size:18px'>TOSUNlux utilizza solo fonti di alta qualit\u00e0, tra cui studi sottoposti a revisione paritaria, per supportare i fatti nei nostri articoli. Il nostro impegno per l&#039;accuratezza e l&#039;affidabilit\u00e0 garantisce che i lettori ricevano informazioni ben documentate di cui possono fidarsi.\r\n\t\t\t\t<\/span>\n\t\t\t\t<\/div>\n\t\t\t\t<ul class='d2'>\n\t\t\t\t\n  <li style='list-style: decimal;font-size:18px;'><a class='aaa a2' target='_blank' href='https:\/\/ewh.ieee.org\/r6\/san_francisco\/ias\/archive\/pdf\/archived_presentations\/Interrupting_Capacity.pdf'>Capacit\u00e0 di interruzione dell&#039;interruttore automatico<\/a><\/li>\n  \n  <li style='list-style: decimal;font-size:18px;'><a class='aaa a2' target='_blank' href='https:\/\/www.eaton.com\/content\/dam\/eaton\/products\/electrical-circuit-protection\/fuses\/solution-center\/bus-ele-tech-lib-interrupting-capacity-vs-interrupting-rating.pdf'>Applicazione del valore di interruzione: interruttori automatici<\/a><\/li>\n  \n  <li style='list-style: decimal;font-size:18px;'><a class='aaa a2' target='_blank' href='https:\/\/www.se.com\/us\/en\/faqs\/FA93276\/'>Cosa significa Ampere Interrupting Rating su un circuito<\/a><\/li>\n  \n  <li style='list-style: decimal;font-size:18px;'><a class='aaa a2' target='_blank' href='https:\/\/www.iallway.com\/blog\/molded-case-circuit-breaker\/mccb-interrupting-capacity-considerations\/'>Come scegliere gli MCCB in base alla capacit\u00e0 di interruzione<\/a><\/li>\n  \n  <li style='list-style: decimal;font-size:18px;'><a class='aaa a2' target='_blank' href='https:\/\/www.researchgate.net\/publication\/4093657_Circuit_breaker_interrupting_capacity_and_short-time_current_ratings'>Capacit\u00e0 di interruzione dell&#039;interruttore automatico<\/a><\/li>\n  \n\t\t\t\t<\/ul>\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t<script>\n\t\t\tconst moduleButtons = document.querySelectorAll('.module-button');\n\t\t\tconst svg1 = document.getElementById('svg-1');\n\t\t\tconst svg2 = document.getElementById('svg-2');\n\t\t\tfor (const button of moduleButtons) {\n\t\t\t\tbutton.addEventListener('click', function() {\n\t\t\t\t\tconst content = this.parentNode.nextElementSibling;\n\t\t\t\t\tcontent.classList.toggle('show');\n\t\t\t\t\tconst svg = this.querySelector('svg');\n\t\t\t\t\tconst plusPath = svg.querySelector('#plus');\n\t\t\t\t});\n\t\t\t\tsvg1.addEventListener('click', function() {\n\t\t\t\t\tsvg1.style.display = 'none';\n\t\t\t\t\tsvg2.style.display = 'block';\n\t\t\t\t});\n\n\t\t\t\tsvg2.addEventListener('click', function() {\n\t\t\t\t\tsvg2.style.display = 'none';\n\t\t\t\t\tsvg1.style.display = 'block';\n\t\t\t\t});\n\t\t\t}\n\t\t<\/script>","protected":false},"excerpt":{"rendered":"<p>The interrupt capacity of a circuit breaker is its ability to safely disconnect a faulted circuit by interrupting a short circuit or overload current.&nbsp; This rating is essential for selecting the right breaker for a system, ensuring safety, and preventing damage.&nbsp; Understanding interrupt ratings helps avoid catastrophic failures by matching breakers with fault current levels specific to an electrical installation. What is Interrupt Capacity? Interrupt capacity refers to the maximum amount of fault current that a circuit breaker can safely interrupt without being damaged or posing a hazard to the electrical system.&nbsp; When a short circuit or overload occurs, the breaker\u2019s primary function is to isolate the faulty circuit from the system.&nbsp; If the fault current exceeds the breaker\u2019s interrupt capacity, the breaker may fail to open properly, leading to dangerous conditions like electrical fires or equipment damage. This rating is typically expressed in kiloamperes (kA) and is a crucial factor when selecting circuit breakers.&nbsp; A breaker with a higher interrupt capacity is designed to handle more substantial fault currents.&nbsp; For example, a breaker rated at 10 kA can safely interrupt fault currents up to 10,000 amperes.&nbsp; Choosing a breaker with an appropriate interrupt capacity ensures that, during a fault, the breaker will trip quickly to protect the system, reducing the risk of damage or fire. What Determines a Circuit&#8217;s Capacity? A circuit\u2019s capacity refers to the amount of current it can handle safely without overheating or suffering permanent damage.&nbsp; Several factors determine a circuit&#8217;s capacity, including conductor size, system voltage, breaker type, and overall [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":12278,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[49],"tags":[],"class_list":["post-12277","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What is the Interrupt Capacity of a Circuit Breaker? - TOSUNlux Official Site - Electrical Circuit Breaker Manufacturer in China<\/title>\n<meta name=\"description\" content=\"Understanding the interrupt capacity of circuit breakers is vital for the safe operation of electrical systems.\" \/>\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.tosunlux.eu\/it\/blog\/the-interrupt-capacity-of-circuit-breakers\/\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What is the Interrupt Capacity of a Circuit Breaker? - 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