{"id":11274,"date":"2024-08-13T13:56:35","date_gmt":"2024-08-13T05:56:35","guid":{"rendered":"https:\/\/www.tosunlux.eu\/?p=11274"},"modified":"2024-10-18T16:28:38","modified_gmt":"2024-10-18T08:28:38","slug":"using-ac-circuit-breakers-in-dc-circuits","status":"publish","type":"post","link":"https:\/\/www.tosunlux.eu\/pt\/blog\/using-ac-circuit-breakers-in-dc-circuits\/","title":{"rendered":"Posso usar um disjuntor CA em um circuito CC?"},"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\" >\u00cdndice<\/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=\"Alternar \u00edndice de conte\u00fado\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Alternar<\/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\/pt\/blog\/using-ac-circuit-breakers-in-dc-circuits\/#The_Basics_of_AC_vs_DC\" title=\"No\u00e7\u00f5es b\u00e1sicas de CA vs CC\">No\u00e7\u00f5es b\u00e1sicas de CA vs CC<\/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\/pt\/blog\/using-ac-circuit-breakers-in-dc-circuits\/#Using_AC_Circuit_Breaker_in_DC_Circuit\" title=\"Usando disjuntor CA em circuito CC\">Usando disjuntor CA em circuito CC<\/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\/pt\/blog\/using-ac-circuit-breakers-in-dc-circuits\/#Trip_Mechanisms\" title=\"Mecanismos de viagem\">Mecanismos de viagem<\/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\/pt\/blog\/using-ac-circuit-breakers-in-dc-circuits\/#Contact_Arcing\" title=\"Contato Arcing\">Contato Arcing<\/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\/pt\/blog\/using-ac-circuit-breakers-in-dc-circuits\/#Ratings_and_Sizing\" title=\"Classifica\u00e7\u00f5es e dimensionamento\">Classifica\u00e7\u00f5es e dimensionamento<\/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\/pt\/blog\/using-ac-circuit-breakers-in-dc-circuits\/#Approval_Considerations\" title=\"Considera\u00e7\u00f5es sobre aprova\u00e7\u00e3o\">Considera\u00e7\u00f5es sobre aprova\u00e7\u00e3o<\/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\/pt\/blog\/using-ac-circuit-breakers-in-dc-circuits\/#Conclusion\" title=\"Conclus\u00e3o\">Conclus\u00e3o<\/a><\/li><\/ul><\/nav><\/div>\n\n<p>Seja projetando pain\u00e9is de controle para m\u00e1quinas pesadas ou microrredes de energia renov\u00e1vel, muitos eletricistas industriais enfrentaram essa quest\u00e3o em algum momento de suas carreiras. Usar o tipo errado de dispositivo de prote\u00e7\u00e3o certamente n\u00e3o terminar\u00e1 bem, mas o que torna CA e CC <a href=\"https:\/\/www.tosunlux.eu\/pt\/category\/power-distribution-system\/\">disjuntores<\/a> diferente? Vamos mergulhar nos detalhes t\u00e9cnicos por tr\u00e1s desse problema que surge frequentemente em aplica\u00e7\u00f5es comerciais e industriais.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><a href=\"https:\/\/www.tosunlux.eu\/pt\/products\/mp-motor-protection-circuit-breaker-mp2\/\"><img fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2022\/05\/MP1-1024x1024.jpg\" alt=\"MP Disjuntor de prote\u00e7\u00e3o do motor MP2\" class=\"wp-image-7258\" width=\"494\" height=\"494\" srcset=\"https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2022\/05\/MP1-1024x1024.jpg 1024w, https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2022\/05\/MP1-300x300.jpg 300w, https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2022\/05\/MP1-150x150.jpg 150w, https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2022\/05\/MP1-768x768.jpg 768w, https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2022\/05\/MP1-1536x1536.jpg 1536w, https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2022\/05\/MP1-12x12.jpg 12w, https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2022\/05\/MP1.jpg 1600w\" sizes=\"(max-width: 494px) 100vw, 494px\" \/><\/a><figcaption>MP Disjuntor de prote\u00e7\u00e3o do motor MP2<\/figcaption><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"The_Basics_of_AC_vs_DC\"><\/span><strong>No\u00e7\u00f5es b\u00e1sicas de CA vs CC<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Para relembrar, a corrente alternada (CA) muda periodicamente de polaridade e magnitude em uma forma de onda sinusoidal ao longo do tempo, enquanto a corrente cont\u00ednua (CC) flui continuamente em uma dire\u00e7\u00e3o. Essa distin\u00e7\u00e3o fundamental afeta como disjuntores e fus\u00edveis operam para interromper circuitos defeituosos.<\/p>\n\n\n\n<p>Os disjuntores CA dependem do eletromagnetismo \u2013 conforme a corrente flutua por cruzamentos de zero em sua onda senoidal, o campo magn\u00e9tico entra em colapso e os contatos do disjuntor abrem. No entanto, a CC n\u00e3o oscila por zero, ent\u00e3o simplesmente monitorar a magnitude da corrente n\u00e3o \u00e9 suficiente para a prote\u00e7\u00e3o do circuito. Outras considera\u00e7\u00f5es t\u00e9cnicas entram em jogo, exigindo disjuntores de corrente CC especializados.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Using_AC_Circuit_Breaker_in_DC_Circuit\"><\/span><strong>Usando disjuntor CA em circuito CC<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<iframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/jDsIhecJ8lc?si=_eqmlNNT-AexsBZK\" title=\"Leitor de v\u00eddeo do YouTube\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n\n\n\n<p>Aqui est\u00e3o algumas considera\u00e7\u00f5es a ter em mente ao usar um circuito CA ou CC:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Trip_Mechanisms\"><\/span>Mecanismos de viagem<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Uma diferen\u00e7a fundamental est\u00e1 no mecanismo de disparo interno usado para interromper o circuito. Em disjuntores CA, este \u00e9 tipicamente um tipo termomagn\u00e9tico que detecta calor e for\u00e7as magn\u00e9ticas do fluxo CA. Em contraste, disjuntores de corrente CC geralmente usam ligas de fus\u00e3o ou tiras bimet\u00e1licas para traduzir corrente em calor que expande fisicamente um mecanismo.<\/p>\n\n\n\n<p>A falta de um cruzamento de corrente zero significa que os disjuntores CC n\u00e3o t\u00eam a assist\u00eancia eletromagn\u00e9tica para extinguir o arco de forma confi\u00e1vel conforme os contatos se separam. \u00c9 necess\u00e1rio um mecanismo de limpeza que opere independentemente da dire\u00e7\u00e3o do fluxo de corrente. Simplificando, os disparos de um disjuntor CA dependem de propriedades exclusivas da corrente alternada que n\u00e3o se traduzem em aplica\u00e7\u00f5es de corrente cont\u00ednua.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Contact_Arcing\"><\/span>Contato Arcing<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Outro problema vem do arco quando os contatos do circuito abrem. Os arcos CA morrem naturalmente duas vezes por ciclo conforme a polaridade inverte. Mas os arcos CC continuam construtivamente at\u00e9 que a quebra seja for\u00e7ada, o que pode reacender o arco se n\u00e3o for rapidamente extinto. Esse fen\u00f4meno ressalta a necessidade de calhas de arco integradas, ventila\u00e7\u00e3o ou contatos especializados em disjuntores CC para extinguir com seguran\u00e7a descargas de alta energia.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Ratings_and_Sizing\"><\/span>Classifica\u00e7\u00f5es e dimensionamento<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>As diferen\u00e7as tamb\u00e9m impactam o dimensionamento dos componentes e as configura\u00e7\u00f5es de disparo. Ao contr\u00e1rio da CA com flutua\u00e7\u00e3o sinusoidal, a corrente CC permanece constante em magnitude uma vez estabelecida. Portanto, os disjuntores CC devem ter a classifica\u00e7\u00e3o de corrente apropriada com base nas condi\u00e7\u00f5es de carga reais, em vez de fatorados para as varia\u00e7\u00f5es de pico\/RMS da CA. A subestima\u00e7\u00e3o pode levar \u00e0 falha precoce ou \u00e0 falta de prote\u00e7\u00e3o.<\/p>\n\n\n\n<p>A voltagem tamb\u00e9m afeta o design e as classifica\u00e7\u00f5es do disjuntor. Enquanto a voltagem CA da rede el\u00e9trica \u00e9 padronizada, os n\u00edveis de CC variam amplamente dependendo da aplica\u00e7\u00e3o. Os sistemas industriais podem utilizar voltagens mais altas que necessitam de isolamento refor\u00e7ado e extin\u00e7\u00e3o de arco em quadros e contatos de disjuntores CC. A sele\u00e7\u00e3o adequada da classe de voltagem \u00e9 crucial.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Approval_Considerations\"><\/span>Considera\u00e7\u00f5es sobre aprova\u00e7\u00e3o<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Tamb\u00e9m vale a pena notar que \u00f3rg\u00e3os reguladores como a UL oferecem diferentes padr\u00f5es de seguran\u00e7a de produtos para disjuntores de energia CA vs CC, dados seus princ\u00edpios operacionais e modos de falha diferentes. Trocar os tipos de disjuntores invalida quaisquer certifica\u00e7\u00f5es ou listagens de seguran\u00e7a, levantando problemas de conformidade dependendo do ambiente de uso final e das demandas do cliente.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span><strong>Conclus\u00e3o<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u00c0 luz dos fatores t\u00e9cnicos revisados aqui, usar um disjuntor CA em energia CC n\u00e3o \u00e9 uma pr\u00e1tica recomendada. Sem levar em conta essas distin\u00e7\u00f5es, o disjuntor pode n\u00e3o fornecer prote\u00e7\u00e3o confi\u00e1vel contra sobrecarga ou curto-circuito devido a mecanismos de disparo incompat\u00edveis, desempenho de arco e classifica\u00e7\u00f5es de componentes. Falha prematura, falta de controle de arco, interrup\u00e7\u00e3o imprecisa ou riscos de seguran\u00e7a podem resultar.<\/p>\n\n\n\n<p>Ao obter uma aprecia\u00e7\u00e3o t\u00e9cnica mais profunda dessas diferen\u00e7as sist\u00eamicas, engenheiros e comerciantes podem se sentir confiantes ao especificar os dispositivos de prote\u00e7\u00e3o corretos para qualquer instala\u00e7\u00e3o comercial ou industrial que manuseie energia CA ou CC.&nbsp;<\/p>\n\n\n\n<p>Contato com <a href=\"https:\/\/www.tosunlux.eu\/pt\/contact\/\">TOSUNLux<\/a> hoje para obter disjuntores de n\u00edvel industrial para qualquer aplica\u00e7\u00e3o.<\/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: 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Nosso compromisso com a precis\u00e3o e a confiabilidade garante que os leitores recebam informa\u00e7\u00f5es bem pesquisadas nas quais podem confiar.<\/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:\/\/www.electricaltechnology.org\/2020\/02\/ac-circuit-breaker-for-dc-circuit.html'>Podemos usar um disjuntor CA para um circuito CC e vice-versa? (electricaltechnology.org)<\/a><\/li>\n  \n  <li style='list-style: decimal;font-size:18px;'><a class='aaa a2' target='_blank' href='https:\/\/www.edaboard.com\/threads\/can-i-use-a-ac-circuit-breaker-in-a-dc-circuit.225227\/'>Posso usar um disjuntor CA em um circuito CC? | F\u00f3rum para Eletr\u00f4nica (edaboard.com)<\/a><\/li>\n  \n  <li style='list-style: decimal;font-size:18px;'><a class='aaa a2' target='_blank' href='https:\/\/www.quisure-circuit-breaker.com\/blog-technology-why-we-can-t-use-ac-circuit-breaker-for-dc.html'>Por que n\u00e3o podemos usar disjuntor CA para CC? | Quisure Circuit Breaker (quisure-circuit-breaker.com)<\/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>Whether designing control panels for heavy machinery or renewable energy microgrids, many industrial electricians have faced this question at some point in their career. Using the wrong protective device type certainly won&#8217;t end well, but just what makes AC and DC circuit breakers different? Let&#8217;s dive into the technical details behind this issue that comes up often in commercial and industrial applications. The Basics of AC vs DC As a refresher, alternating current (AC) periodically changes polarity and magnitude in a sinusoidal waveform over time, while direct current (DC) flows continuously in one direction. This foundational distinction affects how circuit breakers and fuses operate to interrupt faulty circuits. AC circuit breakers rely on electromagnetism &#8211; as current fluctuates through zero crossings in its sine wave, the magnetic field collapses and the breaker contacts open. However, DC does not oscillate through zero, so simply monitoring current magnitude is not enough for circuit protection. Other technical considerations come into play requiring specialized DC current breakers. Using AC Circuit Breaker in DC Circuit Here are a few considerations to keep in mind while using AC vs DC circuit: Trip Mechanisms A key difference lies in the internal trip mechanism used to break the circuit. In AC breakers, this is typically a thermal-magnetic type that senses heat and magnetic forces from AC flow. In contrast, DC current breakers often use melting alloys or bimetal strips to translate current into heat that physically expands a mechanism. The lack of a current zero crossing means DC breakers don&#8217;t have the electromagnetic [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":11275,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[49],"tags":[],"class_list":["post-11274","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Using AC Circuit Breakers in DC Circuits: Feasibility and Considerations<\/title>\n<meta name=\"description\" content=\"Discover the technical distinctions between AC and DC circuit breakers, including trip mechanisms, contact arcing, and sizing factors.\" \/>\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\/pt\/blog\/using-ac-circuit-breakers-in-dc-circuits\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Using AC Circuit Breakers in DC Circuits: Feasibility and Considerations\" \/>\n<meta property=\"og:description\" content=\"Discover the technical distinctions between AC and DC circuit breakers, including trip mechanisms, contact arcing, and sizing factors.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.tosunlux.eu\/pt\/blog\/using-ac-circuit-breakers-in-dc-circuits\/\" \/>\n<meta property=\"og:site_name\" content=\"TOSUNlux Official Site - 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