{"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\/it\/blog\/the-complete-guide-to-thermal-overload-relays\/","title":{"rendered":"Tutto ci\u00f2 che devi sapere sul rel\u00e8 di sovraccarico termico"},"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-complete-guide-to-thermal-overload-relays\/#What_is_a_Thermal_Overload_Relay\" title=\"Che cos&#039;\u00e8 un rel\u00e8 di sovraccarico termico?\">Che cos&#039;\u00e8 un rel\u00e8 di sovraccarico termico?<\/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-complete-guide-to-thermal-overload-relays\/#How_Does_a_Thermal_Overload_Relay_Work\" title=\"Come funziona un rel\u00e8 di sovraccarico termico?\">Come funziona un rel\u00e8 di sovraccarico termico?<\/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\/it\/blog\/the-complete-guide-to-thermal-overload-relays\/#Applications_of_Thermal_Overload_Relays\" title=\"Applicazioni dei rel\u00e8 di sovraccarico termico\">Applicazioni dei rel\u00e8 di sovraccarico termico<\/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\/it\/blog\/the-complete-guide-to-thermal-overload-relays\/#Types_of_Thermal_Overload_Relays\" title=\"Tipi di rel\u00e8 di sovraccarico termico\">Tipi di rel\u00e8 di sovraccarico termico<\/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\/it\/blog\/the-complete-guide-to-thermal-overload-relays\/#Key_Considerations_for_Thermal_Overload_Relays\" title=\"Considerazioni chiave per i rel\u00e8 di sovraccarico termico\">Considerazioni chiave per i rel\u00e8 di sovraccarico termico<\/a><\/li><\/ul><\/nav><\/div>\n\n<p>Gli impianti elettrici spesso affrontano il rischio di surriscaldamento dovuto a un flusso di corrente eccessivo, che pu\u00f2 causare danni alle apparecchiature, pericoli per la sicurezza e guasti al sistema. I rel\u00e8 di sovraccarico termico sono dispositivi di protezione cruciali progettati per monitorare e proteggere i circuiti elettrici da tali sovraccarichi termici. In questa guida completa, approfondiremo il funzionamento, le applicazioni e le considerazioni chiave per i rel\u00e8 di sovraccarico termico.<\/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>Che cos&#039;\u00e8 un rel\u00e8 di sovraccarico termico?<\/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\/it\/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\u00e8 di sovraccarico termico 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\/it\/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\u00e8 elettronico di sovraccarico termico TSR2-F<\/figcaption><\/figure>\n<\/div>\n<\/div>\n\n\n\n<p>UN <strong><a href=\"https:\/\/www.tosunlux.eu\/it\/category\/thermal-overload-relay\/\" target=\"_blank\" rel=\"noreferrer noopener\">rel\u00e8 di sovraccarico termico<\/a><\/strong> \u00e8 un dispositivo di protezione elettromeccanico che monitora la corrente che scorre attraverso un circuito elettrico. Viene solitamente utilizzato in combinazione con contattori o avviatori motore per proteggere motori e altre apparecchiature elettriche dal surriscaldamento dovuto a corrente eccessiva. Il rel\u00e8 funziona in base al principio secondo cui un aumento di corrente comporta un aumento della temperatura nei componenti del 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>Come funziona un rel\u00e8 di sovraccarico termico?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Il rel\u00e8 di sovraccarico termico \u00e8 costituito da una striscia bimetallica e da un meccanismo di sgancio. La striscia bimetallica \u00e8 composta da due metalli diversi con diversi coefficienti di dilatazione termica legati insieme. Quando la corrente attraversa il rel\u00e8, il calore generato fa s\u00ec che la striscia bimetallica si pieghi a causa delle diverse velocit\u00e0 di dilatazione dei metalli. Man mano che la corrente aumenta, aumenta anche la piegatura della striscia, che alla fine fa scattare il rel\u00e8.<\/p>\n\n\n\n<p>Il meccanismo di sgancio funziona in base all&#039;entit\u00e0 della piegatura della striscia bimetallica. Quando la striscia raggiunge un punto critico, attiva il meccanismo di sgancio, che apre i contatti elettrici del rel\u00e8, interrompendo il circuito e fermando il flusso di corrente. Una volta che il circuito si raffredda, la striscia bimetallica torna nella sua posizione originale, consentendo al rel\u00e8 di resettarsi.<\/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=\"Che cosa \u00e8 il rel\u00e8 di sovraccarico termico? Come funziona?\" 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>Applicazioni dei rel\u00e8 di sovraccarico termico<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>I rel\u00e8 di sovraccarico termico sono ampiamente utilizzati in varie applicazioni per proteggere apparecchiature e sistemi elettrici. Alcune delle loro applicazioni principali includono:<\/p>\n\n\n\n<p>Protezione del motore: sono comunemente utilizzati per proteggere i motori da condizioni di sovraccarico, come l&#039;eccessivo assorbimento di corrente dovuto a guasti meccanici o elevate richieste di carico.<\/p>\n\n\n\n<p>Macchinari industriali: i rel\u00e8 di sovraccarico termico offrono protezione ai componenti elettrici di macchine e attrezzature utilizzate nei processi di produzione.<\/p>\n\n\n\n<p>Sistemi HVAC: vengono impiegati nei sistemi di riscaldamento, ventilazione e condizionamento dell&#039;aria per proteggere i compressori e i motori dal surriscaldamento.<\/p>\n\n\n\n<p>Pompe e ventilatori: i rel\u00e8 di sovraccarico termico proteggono le pompe e i ventilatori utilizzati in varie applicazioni dai danni causati da situazioni di sovracorrente.<\/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>Tipi di rel\u00e8 di sovraccarico termico<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>I rel\u00e8 di sovraccarico termico sono disponibili in diversi tipi, per soddisfare vari requisiti di tensione e corrente. Alcuni tipi comuni includono:<\/p>\n\n\n\n<p>Classe 10: questi rel\u00e8 hanno una risposta di intervento rapida e sono generalmente progettati per applicazioni in cui \u00e8 essenziale una rapida protezione del motore.<\/p>\n\n\n\n<p>Classe 20: offrono una risposta di attivazione pi\u00f9 lenta rispetto ai rel\u00e8 di Classe 10, rendendoli adatti ad applicazioni che richiedono tempi di avviamento pi\u00f9 lunghi.<\/p>\n\n\n\n<p>Ripristino manuale: in questi rel\u00e8, lo stato di sgancio deve essere ripristinato manualmente dall&#039;operatore dopo che il rel\u00e8 si \u00e8 raffreddato e il guasto \u00e8 stato risolto.<\/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>Considerazioni chiave per i rel\u00e8 di sovraccarico termico<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Quando si selezionano e si utilizzano rel\u00e8 di sovraccarico termico, \u00e8 necessario considerare alcuni fattori:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Dimensionamento corretto<\/li><li>Temperatura ambiente<\/li><li>Corrente di avviamento del motore<\/li><li>Impostazioni di regolazione<\/li><li>Test e manutenzione<\/li><\/ul>\n\n\n\n<p>L&#039;impegno di Tosunlux verso una qualit\u00e0 e una lavorazione artigianali senza pari \u00e8 evidente in ogni prodotto meticolosamente progettato, che rappresenta una combinazione perfetta di estetica e durevolezza.<\/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 v27.5 - 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\/it\/blog\/the-complete-guide-to-thermal-overload-relays\/\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\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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