{"id":7723,"date":"2023-08-02T16:58:06","date_gmt":"2023-08-02T08:58:06","guid":{"rendered":"https:\/\/www.tosunlux.eu\/?p=7723"},"modified":"2024-11-11T16:05:44","modified_gmt":"2024-11-11T08:05:44","slug":"the-complete-guide-to-thermal-overload-relays","status":"publish","type":"post","link":"https:\/\/www.tosunlux.eu\/pt\/blog\/the-complete-guide-to-thermal-overload-relays\/","title":{"rendered":"Tudo o que voc\u00ea precisa saber sobre o rel\u00e9 de sobrecarga t\u00e9rmica"},"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\/the-complete-guide-to-thermal-overload-relays\/#What_is_a_Thermal_Overload_Relay\" title=\"O que \u00e9 um rel\u00e9 de sobrecarga t\u00e9rmica?\">O que \u00e9 um rel\u00e9 de sobrecarga t\u00e9rmica?<\/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\/the-complete-guide-to-thermal-overload-relays\/#How_Does_a_Thermal_Overload_Relay_Work\" title=\"Como funciona um rel\u00e9 de sobrecarga t\u00e9rmica?\">Como funciona um rel\u00e9 de sobrecarga t\u00e9rmica?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.tosunlux.eu\/pt\/blog\/the-complete-guide-to-thermal-overload-relays\/#Applications_of_Thermal_Overload_Relays\" title=\"Aplica\u00e7\u00f5es de Rel\u00e9s de Sobrecarga T\u00e9rmica\">Aplica\u00e7\u00f5es de Rel\u00e9s de Sobrecarga T\u00e9rmica<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.tosunlux.eu\/pt\/blog\/the-complete-guide-to-thermal-overload-relays\/#Types_of_Thermal_Overload_Relays\" title=\"Tipos de rel\u00e9s de sobrecarga t\u00e9rmica\">Tipos de rel\u00e9s de sobrecarga t\u00e9rmica<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.tosunlux.eu\/pt\/blog\/the-complete-guide-to-thermal-overload-relays\/#Key_Considerations_for_Thermal_Overload_Relays\" title=\"Principais considera\u00e7\u00f5es para rel\u00e9s de sobrecarga t\u00e9rmica\">Principais considera\u00e7\u00f5es para rel\u00e9s de sobrecarga t\u00e9rmica<\/a><\/li><\/ul><\/nav><\/div>\n\n<p>Os sistemas el\u00e9tricos geralmente enfrentam o risco de superaquecimento devido ao fluxo excessivo de corrente, o que pode levar a danos ao equipamento, riscos \u00e0 seguran\u00e7a e falhas do sistema. Os rel\u00e9s de sobrecarga t\u00e9rmica s\u00e3o dispositivos de prote\u00e7\u00e3o cruciais projetados para monitorar e proteger os circuitos el\u00e9tricos de tais sobrecargas t\u00e9rmicas. Neste guia abrangente, vamos nos aprofundar no funcionamento, nas aplica\u00e7\u00f5es e nas principais considera\u00e7\u00f5es dos rel\u00e9s de sobrecarga t\u00e9rmica.<\/p>\n\n\n\n<h2 class=\"has-medium-font-size wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_is_a_Thermal_Overload_Relay\"><\/span><strong>O que \u00e9 um rel\u00e9 de sobrecarga t\u00e9rmica?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/www.tosunlux.eu\/pt\/products\/tsr2-d-thermal-overload-relay\/\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"1014\" src=\"https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2022\/05\/9-2-1024x1014.jpg\" alt=\"\" class=\"wp-image-2636\" srcset=\"https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2022\/05\/9-2-1024x1014.jpg 1024w, https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2022\/05\/9-2-300x297.jpg 300w, https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2022\/05\/9-2-150x150.jpg 150w, https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2022\/05\/9-2-768x761.jpg 768w, https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2022\/05\/9-2-1536x1522.jpg 1536w, https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2022\/05\/9-2.jpg 1600w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption>Rel\u00e9 de sobrecarga t\u00e9rmica TSR2-D<\/figcaption><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-large is-resized\"><a href=\"https:\/\/www.tosunlux.eu\/pt\/products\/tsr2-f-electronic-thermal-overload-relay\/\"><img decoding=\"async\" src=\"https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2022\/05\/225f-1022x1024.jpg\" alt=\"\" class=\"wp-image-2808\" width=\"402\" height=\"402\" srcset=\"https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2022\/05\/225f-1022x1024.jpg 1022w, https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2022\/05\/225f-300x300.jpg 300w, https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2022\/05\/225f-150x150.jpg 150w, https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2022\/05\/225f-768x769.jpg 768w, https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2022\/05\/225f-1533x1536.jpg 1533w, https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2022\/05\/225f.jpg 1600w\" sizes=\"(max-width: 402px) 100vw, 402px\" \/><\/a><figcaption>Rel\u00e9 de Sobrecarga T\u00e9rmica Eletr\u00f4nica TSR2-F<\/figcaption><\/figure>\n<\/div>\n<\/div>\n\n\n\n<p>A <strong><a href=\"https:\/\/www.tosunlux.eu\/pt\/category\/thermal-overload-relay\/\" target=\"_blank\" rel=\"noreferrer noopener\">rel\u00e9 de sobrecarga t\u00e9rmica<\/a><\/strong> \u00e9 um dispositivo de prote\u00e7\u00e3o eletromec\u00e2nica que monitora a corrente que flui atrav\u00e9s de um circuito el\u00e9trico. \u00c9 normalmente usado em combina\u00e7\u00e3o com contatores ou partidas de motores para proteger motores e outros equipamentos el\u00e9tricos contra superaquecimento devido a corrente excessiva. O rel\u00e9 opera com base no princ\u00edpio de que o aumento da corrente leva a um aumento da temperatura nos componentes do circuito.<\/p>\n\n\n\n<h2 class=\"has-medium-font-size wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_Does_a_Thermal_Overload_Relay_Work\"><\/span><strong>Como funciona um rel\u00e9 de sobrecarga t\u00e9rmica?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>O rel\u00e9 de sobrecarga t\u00e9rmica consiste em uma tira bimet\u00e1lica e um mecanismo de disparo. A tira bimet\u00e1lica \u00e9 feita de dois metais diferentes com diferentes coeficientes de expans\u00e3o t\u00e9rmica ligados entre si. Quando a corrente passa pelo rel\u00e9, o calor gerado faz com que a tira bimet\u00e1lica se dobre devido \u00e0s diferentes taxas de expans\u00e3o dos metais. \u00c0 medida que a corrente aumenta, tamb\u00e9m aumenta a curvatura da tira, que acaba desarmando o rel\u00e9.<\/p>\n\n\n\n<p>O mecanismo de disparo opera com base na extens\u00e3o da dobra da tira bimet\u00e1lica. Quando a tira atinge um ponto cr\u00edtico, ela aciona o mecanismo de disparo, que abre os contatos el\u00e9tricos do rel\u00e9, interrompendo o circuito e interrompendo o fluxo de corrente. Uma vez que o circuito esfria, a tira bimet\u00e1lica retorna \u00e0 sua posi\u00e7\u00e3o original, permitindo que o rel\u00e9 seja reinicializado.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe title=\"O que \u00e9 Rel\u00e9 de Sobrecarga T\u00e9rmica | Como Funciona?\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/DhTKxb8T4wc?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<h2 class=\"has-medium-font-size wp-block-heading\"><span class=\"ez-toc-section\" id=\"Applications_of_Thermal_Overload_Relays\"><\/span><strong>Aplica\u00e7\u00f5es de Rel\u00e9s de Sobrecarga T\u00e9rmica<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Os rel\u00e9s de sobrecarga t\u00e9rmica s\u00e3o amplamente utilizados em v\u00e1rias aplica\u00e7\u00f5es para proteger equipamentos e sistemas el\u00e9tricos. Algumas de suas principais aplica\u00e7\u00f5es incluem:<\/p>\n\n\n\n<p>Prote\u00e7\u00e3o do Motor: Eles s\u00e3o comumente usados para proteger os motores de condi\u00e7\u00f5es de sobrecarga, como consumo excessivo de corrente devido a falhas mec\u00e2nicas ou altas demandas de carga.<\/p>\n\n\n\n<p>M\u00e1quinas Industriais: Os rel\u00e9s de sobrecarga t\u00e9rmica oferecem prote\u00e7\u00e3o para componentes el\u00e9tricos em m\u00e1quinas e equipamentos utilizados em processos de fabrica\u00e7\u00e3o.<\/p>\n\n\n\n<p>Sistemas HVAC: S\u00e3o empregados em sistemas de aquecimento, ventila\u00e7\u00e3o e ar condicionado para proteger compressores e motores contra superaquecimento.<\/p>\n\n\n\n<p>Bombas e Ventiladores: Os rel\u00e9s de sobrecarga t\u00e9rmica protegem bombas e ventiladores usados em diversas aplica\u00e7\u00f5es contra danos causados por situa\u00e7\u00f5es de sobrecorrente.<\/p>\n\n\n\n<h2 class=\"has-medium-font-size wp-block-heading\"><span class=\"ez-toc-section\" id=\"Types_of_Thermal_Overload_Relays\"><\/span><strong>Tipos de rel\u00e9s de sobrecarga t\u00e9rmica<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Os rel\u00e9s de sobrecarga t\u00e9rmica v\u00eam em diferentes tipos, atendendo a v\u00e1rios requisitos de tens\u00e3o e corrente. Alguns tipos comuns incluem:<\/p>\n\n\n\n<p>Classe 10: Esses rel\u00e9s t\u00eam uma resposta de disparo r\u00e1pida, normalmente projetados para aplica\u00e7\u00f5es onde a prote\u00e7\u00e3o r\u00e1pida do motor \u00e9 essencial.<\/p>\n\n\n\n<p>Classe 20: Eles oferecem uma resposta de disparo mais lenta em compara\u00e7\u00e3o com os rel\u00e9s da Classe 10, tornando-os adequados para aplica\u00e7\u00f5es que requerem tempos de partida mais longos.<\/p>\n\n\n\n<p>Reinicializa\u00e7\u00e3o manual: Nestes rel\u00e9s, o estado de desarme deve ser redefinido manualmente pelo operador ap\u00f3s o rel\u00e9 ter esfriado e a falha ter sido corrigida.<\/p>\n\n\n\n<h2 class=\"has-medium-font-size wp-block-heading\"><span class=\"ez-toc-section\" id=\"Key_Considerations_for_Thermal_Overload_Relays\"><\/span><strong>Principais considera\u00e7\u00f5es para rel\u00e9s de sobrecarga t\u00e9rmica<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Ao selecionar e usar rel\u00e9s de sobrecarga t\u00e9rmica, alguns fatores precisam ser considerados:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Dimensionamento correto<\/li><li>Temperatura ambiente<\/li><li>Corrente de partida do motor<\/li><li>Configura\u00e7\u00f5es de ajuste<\/li><li>Teste e Manuten\u00e7\u00e3o<\/li><\/ul>\n\n\n\n<p>O compromisso da Tosunlux com qualidade e artesanato inigual\u00e1veis \u00e9 evidente em cada produto meticulosamente projetado, apresentando uma mistura perfeita de est\u00e9tica e durabilidade.<\/p>","protected":false},"excerpt":{"rendered":"<p>Electrical systems often face the risk of overheating due to excessive current flow, which can lead to equipment damage, safety hazards, and system failures. Thermal overload relays are crucial protective devices designed to monitor and protect electrical circuits from such thermal overloads. In this comprehensive guide, we will delve into the functioning, applications, and key considerations for thermal overload relays. What is a Thermal Overload Relay? A thermal overload relay is an electromechanical protection device that monitors the current flowing through an electrical circuit. It is typically used in combination with contactors or motor starters to protect motors and other electrical equipment from overheating due to excessive current. The relay operates based on the principle that increased current leads to a rise in temperature in the circuit components. How Does a Thermal Overload Relay Work? The thermal overload relay consists of a bimetallic strip and a tripping mechanism. The bimetallic strip is made of two different metals with different thermal expansion coefficients bonded together. When current passes through the relay, the heat generated causes the bimetallic strip to bend due to the differing expansion rates of the metals. As the current increases, so does the strip&#8217;s bending, which ultimately trips the relay. The tripping mechanism operates based on the extent of bending of the bimetallic strip. When the strip reaches a critical point, it activates the tripping mechanism, which opens the electrical contacts of the relay, interrupting the circuit and stopping the current flow. Once the circuit cools down, the bimetallic strip returns to its [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":11749,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[49],"tags":[],"class_list":["post-7723","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>The Complete Guide to Thermal Overload Relays: Working, Applications, and Considerations<\/title>\n<meta name=\"description\" content=\"Discover everything you need to know about thermal overload relays in this comprehensive guide. Trust in Tosunlux&#039;s commitment to unmatched quality and craftsmanship for reliable thermal overload relays.\" \/>\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\/the-complete-guide-to-thermal-overload-relays\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"The Complete Guide to Thermal Overload Relays: Working, Applications, and Considerations\" \/>\n<meta property=\"og:description\" content=\"Discover everything you need to know about thermal overload relays in this comprehensive guide. 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