{"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\/fr\/blog\/the-complete-guide-to-thermal-overload-relays\/","title":{"rendered":"Tout ce que vous devez savoir sur le relais de surcharge thermique"},"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\/the-complete-guide-to-thermal-overload-relays\/#What_is_a_Thermal_Overload_Relay\" title=\"Qu&#039;est-ce qu&#039;un relais de surcharge thermique ?\">Qu&#039;est-ce qu&#039;un relais de surcharge thermique ?<\/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\/the-complete-guide-to-thermal-overload-relays\/#How_Does_a_Thermal_Overload_Relay_Work\" title=\"Comment fonctionne un relais de surcharge thermique ?\">Comment fonctionne un relais de surcharge thermique ?<\/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\/fr\/blog\/the-complete-guide-to-thermal-overload-relays\/#Applications_of_Thermal_Overload_Relays\" title=\"Applications des relais thermiques de surcharge\">Applications des relais thermiques de surcharge<\/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\/fr\/blog\/the-complete-guide-to-thermal-overload-relays\/#Types_of_Thermal_Overload_Relays\" title=\"Types de relais thermiques de surcharge\">Types de relais thermiques de surcharge<\/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\/fr\/blog\/the-complete-guide-to-thermal-overload-relays\/#Key_Considerations_for_Thermal_Overload_Relays\" title=\"Consid\u00e9rations cl\u00e9s pour les relais thermiques de surcharge\">Consid\u00e9rations cl\u00e9s pour les relais thermiques de surcharge<\/a><\/li><\/ul><\/nav><\/div>\n\n<p>Les syst\u00e8mes \u00e9lectriques sont souvent confront\u00e9s au risque de surchauffe en raison d&#039;un flux de courant excessif, ce qui peut entra\u00eener des dommages mat\u00e9riels, des risques pour la s\u00e9curit\u00e9 et des d\u00e9faillances du syst\u00e8me. Les relais de surcharge thermique sont des dispositifs de protection cruciaux con\u00e7us pour surveiller et prot\u00e9ger les circuits \u00e9lectriques contre de telles surcharges thermiques. Dans ce guide complet, nous approfondirons le fonctionnement, les applications et les principales consid\u00e9rations relatives aux relais de surcharge thermique.<\/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>Qu&#039;est-ce qu&#039;un relais de surcharge thermique ?<\/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\/fr\/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>Relais de surcharge thermique 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\/fr\/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>Relais de surcharge thermique \u00e9lectronique TSR2-F<\/figcaption><\/figure>\n<\/div>\n<\/div>\n\n\n\n<p>UN <strong><a href=\"https:\/\/www.tosunlux.eu\/fr\/category\/thermal-overload-relay\/\" target=\"_blank\" rel=\"noreferrer noopener\">relais de surcharge thermique<\/a><\/strong> est un dispositif de protection \u00e9lectrom\u00e9canique qui surveille le courant circulant dans un circuit \u00e9lectrique. Il est g\u00e9n\u00e9ralement utilis\u00e9 en combinaison avec des contacteurs ou des d\u00e9marreurs de moteur pour prot\u00e9ger les moteurs et autres \u00e9quipements \u00e9lectriques contre la surchauffe due \u00e0 un courant excessif. Le relais fonctionne sur la base du principe selon lequel une augmentation du courant entra\u00eene une augmentation de la temp\u00e9rature dans les composants du circuit.<\/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>Comment fonctionne un relais de surcharge thermique ?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Le relais de surcharge thermique se compose d&#039;un bilame et d&#039;un m\u00e9canisme de d\u00e9clenchement. Le bilame est compos\u00e9 de deux m\u00e9taux diff\u00e9rents avec des coefficients de dilatation thermique diff\u00e9rents li\u00e9s ensemble. Lorsque le courant traverse le relais, la chaleur g\u00e9n\u00e9r\u00e9e provoque la flexion du bilame en raison des taux de dilatation diff\u00e9rents des m\u00e9taux. \u00c0 mesure que le courant augmente, la flexion de la bande augmente \u00e9galement, ce qui d\u00e9clenche finalement le relais.<\/p>\n\n\n\n<p>Le m\u00e9canisme de d\u00e9clenchement fonctionne en fonction de l&#039;\u00e9tendue de la flexion du bilame. Lorsque la bande atteint un point critique, elle active le m\u00e9canisme de d\u00e9clenchement, qui ouvre les contacts \u00e9lectriques du relais, interrompant le circuit et arr\u00eatant le flux de courant. Une fois le circuit refroidi, le bilame revient \u00e0 sa position d&#039;origine, permettant au relais de se r\u00e9initialiser.<\/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=\"Qu&#039;est-ce qu&#039;un relais de surcharge thermique | Comment \u00e7a marche ?\" 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>Applications des relais thermiques de surcharge<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Les relais de surcharge thermique sont largement utilis\u00e9s dans diverses applications pour prot\u00e9ger les \u00e9quipements et syst\u00e8mes \u00e9lectriques. Certaines de leurs principales applications incluent\u00a0:<\/p>\n\n\n\n<p>Protection du moteur : Ils sont couramment utilis\u00e9s pour prot\u00e9ger les moteurs contre les conditions de surcharge, telles qu&#039;une consommation de courant excessive due \u00e0 des d\u00e9fauts m\u00e9caniques ou \u00e0 des demandes de charge \u00e9lev\u00e9es.<\/p>\n\n\n\n<p>Machinerie industrielle : Les relais de surcharge thermique offrent une protection pour les composants \u00e9lectriques des machines et des \u00e9quipements utilis\u00e9s dans les processus de fabrication.<\/p>\n\n\n\n<p>Syst\u00e8mes HVAC : Ils sont utilis\u00e9s dans les syst\u00e8mes de chauffage, de ventilation et de climatisation pour prot\u00e9ger les compresseurs et les moteurs contre la surchauffe.<\/p>\n\n\n\n<p>Pompes et ventilateurs\u00a0: les relais de surcharge thermique prot\u00e8gent les pompes et les ventilateurs utilis\u00e9s dans diverses applications contre les dommages caus\u00e9s par les situations de surintensit\u00e9.<\/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>Types de relais thermiques de surcharge<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Les relais de surcharge thermique sont de diff\u00e9rents types, r\u00e9pondant \u00e0 diverses exigences de tension et de courant. Certains types courants incluent\u00a0:<\/p>\n\n\n\n<p>Classe 10 : Ces relais ont une r\u00e9ponse de d\u00e9clenchement rapide, g\u00e9n\u00e9ralement con\u00e7us pour les applications o\u00f9 une protection rapide du moteur est essentielle.<\/p>\n\n\n\n<p>Classe 20 : Ils offrent une r\u00e9ponse de d\u00e9clenchement plus lente que les relais de classe 10, ce qui les rend adapt\u00e9s aux applications n\u00e9cessitant des temps de d\u00e9marrage plus longs.<\/p>\n\n\n\n<p>R\u00e9armement manuel : Dans ces relais, l&#039;\u00e9tat d\u00e9clench\u00e9 doit \u00eatre r\u00e9initialis\u00e9 manuellement par l&#039;op\u00e9rateur une fois que le relais a refroidi et que le d\u00e9faut a \u00e9t\u00e9 r\u00e9solu.<\/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>Consid\u00e9rations cl\u00e9s pour les relais thermiques de surcharge<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Lors de la s\u00e9lection et de l&#039;utilisation de relais de surcharge thermique, certains facteurs doivent \u00eatre pris en compte\u00a0:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Taille correcte<\/li><li>Temp\u00e9rature ambiante<\/li><li>Courant de d\u00e9marrage du moteur<\/li><li>Param\u00e8tres de r\u00e9glage<\/li><li>Essais et entretien<\/li><\/ul>\n\n\n\n<p>L&#039;engagement de Tosunlux envers une qualit\u00e9 et un savoir-faire in\u00e9gal\u00e9s est \u00e9vident dans chaque produit m\u00e9ticuleusement con\u00e7u, pr\u00e9sentant un m\u00e9lange parfait d&#039;esth\u00e9tique et de durabilit\u00e9.<\/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\/fr\/blog\/the-complete-guide-to-thermal-overload-relays\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\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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