{"id":19656,"date":"2026-09-24T14:00:00","date_gmt":"2026-09-24T12:00:00","guid":{"rendered":"https:\/\/rdcomponents.com\/site\/?p=19656"},"modified":"2026-10-12T17:57:04","modified_gmt":"2026-10-12T15:57:04","slug":"235-come-sappiamo-se-il-dispositivo-e-intervenuto","status":"publish","type":"post","link":"https:\/\/rdcomponents.com\/site\/2026\/09\/24\/235-come-sappiamo-se-il-dispositivo-e-intervenuto\/","title":{"rendered":"#235 COME SAPPIAMO SE IL DISPOSITIVO \u00c8 INTERVENUTO?"},"content":{"rendered":"\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><\/div>\n<\/div>\n\n\n\n<p class=\"has-text-color has-link-color wp-elements-1 wp-block-paragraph\" style=\"color:#222222;font-size:16px\">Una macchina o un apparecchio si surriscaldano e improvvisamente si fermano, mettendo la macchina a riposo e consentendo alla temperatura di tornare alla normalit\u00e0. Noi sappiamo che questo accade perch\u00e9 \u00e8 intervenuto un <strong>termostato<\/strong>, o altro dispositivo simile. Ma se non fossimo posizionati in prossimit\u00e0 della nostra macchina, ad esempio un <strong>elettrodomestico<\/strong>, come faremmo a capire che un <strong>dispositivo di protezione \u00e8 intervenuto<\/strong>?<\/p>\n\n\n\n<p class=\"has-text-color has-link-color wp-elements-2 wp-block-paragraph\" style=\"color:#222222;font-size:16px\">Un circuito si apre e una macchina si ferma, ma un altro <strong><a href=\"https:\/\/rdcomponents.com\/site\/2021\/12\/16\/16-termostati-con-contatti-normalmente-aperti\/\" target=\"_blank\" rel=\"noreferrer noopener\">circuito che prima era aperto<\/a><\/strong> si chiude e a quel punto pu\u00f2 intervenire in modo attivo, ad esempio facendo partire una <strong>ventola di raffreddamento.<\/strong><\/p>\n\n\n\n<p class=\"has-text-color has-link-color wp-elements-3 wp-block-paragraph\" style=\"color:#222222;font-size:16px\">\u00c8 quello che succede se mettiamo in serie un <strong>termostato normalmente chiuso<\/strong> e un <strong>normalmente aperto<\/strong>, tarati alla stessa temperatura.<\/p>\n\n\n\n<p class=\"has-text-color has-link-color wp-elements-4 wp-block-paragraph\" style=\"color:#222222;font-size:16px\">Questo sistema per\u00f2 non garantisce un\u2019<strong>azione simultanea<\/strong> con la macchina che si ferma e la ventola che parte. Perch\u00e9 in entrambi i casi <strong><a href=\"https:\/\/rdcomponents.com\/site\/2022\/09\/29\/51-la-tolleranza-sulla-temperatura\/\" target=\"_blank\" rel=\"noreferrer noopener\">dobbiamo considerare la tolleranza<\/a><\/strong>.<\/p>\n\n\n\n<p class=\"has-text-color has-link-color wp-elements-5 wp-block-paragraph\" style=\"color:#222222;font-size:16px\">Mi spiego con un esempio. Se la sicurezza di una macchina \u00e8 garantita da un <strong>termostato&nbsp;<\/strong>di <strong>70\u00b0C+\/-3\u00b0C<\/strong> significa che questo potr\u00e0 intervenire tra <strong>67\u00b0C<\/strong> e<strong>&nbsp;73\u00b0C<\/strong>.<\/p>\n\n\n\n<p class=\"has-text-color has-link-color wp-elements-6 wp-block-paragraph\" style=\"color:#222222;font-size:16px\">Se vogliamo che, una volta intervenuta la sicurezza, si possa partire con una <strong>ventola di raffreddamento<\/strong> dobbiamo affiancare nello stesso punto un termostato con contatti normalmente <strong>aperti\u00a0<\/strong>che lavori alla stessa temperatura. Di conseguenza anche questo secondo dispositivo sar\u00e0 un <strong>70\u00b0C+\/-3\u00b0C<\/strong> con un potenziale intervento tra i <strong>67\u00b0C<\/strong> e i <strong>73\u00b0C<\/strong>.<\/p>\n\n\n\n<p class=\"has-text-color has-link-color wp-elements-7 wp-block-paragraph\" style=\"color:#222222;font-size:16px\">Facile capire che le possibilit\u00e0 che entrambi i dispositivi intervengano alla medesima temperatura sono piuttosto flebili. Questo potrebbe non essere un problema, dato che si potrebbe anche mettere il termostato di azionamento della ventola a una temperatura pi\u00f9 alta, ad esempio a <strong>75\u00b0C<\/strong>. Ma tutto dipende dal progetto e dal reale motivo per cui si decide di fare ricorso a un <strong>termostato di azionamento<\/strong>.<\/p>\n\n\n\n<p class=\"has-text-color has-link-color wp-elements-8 wp-block-paragraph\" style=\"color:#222222;font-size:16px\">Fin qui mi sono limitato a parlare di una ventola di raffreddamento. In realt\u00e0 potrebbe tranquillamente essere un <strong>segnale acustico<\/strong>, un <strong>allarme<\/strong>, una <strong>spia\u00a0luminosa.\u00a0<\/strong>Quando diventa obbligatorio intervenire, o essere informati, non appena il termostato di sicurezza \u00e8 intervenuto, non possiamo affidarci alla soluzione del<strong>\u00a0doppio termostato<\/strong> ma dobbiamo per forza passare all\u2019utilizzo di un dispositivo con i <strong><a href=\"https:\/\/rdcomponents.com\/site\/2025\/01\/23\/158-contatti-in-scambio\/\" target=\"_blank\" rel=\"noreferrer noopener\">contatti in scambio<\/a><\/strong>, definiti anche <strong><a href=\"https:\/\/rdcomponents.com\/site\/2022\/12\/15\/62-da-spst-a-3pst\/\" target=\"_blank\" rel=\"noreferrer noopener\">SPDT<\/a><\/strong>.<\/p>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"703\" height=\"332\" src=\"https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2026\/10\/Schema-SPDT.jpg\" alt=\"dispositivo\" class=\"wp-image-19657\" style=\"width:600px;height:auto\" srcset=\"https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2026\/10\/Schema-SPDT.jpg 703w, https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2026\/10\/Schema-SPDT-300x142.jpg 300w, https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2026\/10\/Schema-SPDT-150x71.jpg 150w\" sizes=\"auto, (max-width: 703px) 100vw, 703px\" \/><\/figure>\n<\/div>\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"has-text-color has-link-color wp-elements-9 wp-block-paragraph\" style=\"color:#222222;font-size:16px\">In pratica abbiamo un contatto normalmente chiuso che nel momento in cui si apre andr\u00e0 a chiudere un contatto inizialmente aperto.<\/p>\n\n\n\n<p class=\"has-text-color has-link-color wp-elements-10 wp-block-paragraph\" style=\"color:#222222;font-size:16px\">Questa \u00e8 una soluzione che viene utilizzata nei <strong><a href=\"https:\/\/rdcomponents.com\/site\/termostati-a-bulbo\/\" target=\"_blank\" rel=\"noreferrer noopener\">termostati a bulbo<\/a><\/strong>, per esempio quelli nei <strong>forni<\/strong>, ed \u00e8 stata sviluppata sia per i <strong><a href=\"https:\/\/rdcomponents.com\/site\/termostati-regolabili\/\" target=\"_blank\" rel=\"noreferrer noopener\">termostati regolabili<\/a><\/strong>, che per quelli di sicurezza, con <strong><a href=\"https:\/\/rdcomponents.com\/site\/termostati-bimetallici\/#tk32\" target=\"_blank\" rel=\"noreferrer noopener\">riarmo manuale<\/a><\/strong>.<\/p>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img decoding=\"async\" src=\"https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2026\/10\/AM03DTAMR03DT.png\" alt=\"dispositivo\" class=\"wp-image-19658\" style=\"width:650px;height:auto\"\/><\/figure>\n<\/div>\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"850\" height=\"563\" src=\"https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2022\/07\/Bulbi-e1662972367627.jpg\" alt=\"\" class=\"wp-image-13063\" style=\"width:650px;height:auto\" srcset=\"https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2022\/07\/Bulbi-e1662972367627.jpg 850w, https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2022\/07\/Bulbi-e1662972367627-300x199.jpg 300w, https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2022\/07\/Bulbi-e1662972367627-768x509.jpg 768w\" sizes=\"auto, (max-width: 850px) 100vw, 850px\" \/><\/figure>\n<\/div>\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"has-text-color has-link-color wp-elements-11 wp-block-paragraph\" style=\"color:#222222;font-size:16px\">Esistono per\u00f2 anche dei <strong>protettori termici<\/strong> realizzati con questa configurazione. Sono gli <strong><a href=\"https:\/\/rdcomponents.com\/site\/protettori-contatti-scambio\/\" target=\"_blank\" rel=\"noreferrer noopener\">AM03DT<\/a><\/strong> di <strong>TOMIC<\/strong>, prodotti anche in <a href=\"https:\/\/rdcomponents.com\/site\/2023\/02\/09\/68-protettori-termici-con-contatti-in-scambio-e-riarmo-elettrico\/\" target=\"_blank\" rel=\"noreferrer noopener\">una versione con <strong>PTC<\/strong><\/a>, gli <strong><a href=\"https:\/\/rdcomponents.com\/site\/protettori-contatti-scambio\/\" target=\"_blank\" rel=\"noreferrer noopener\">AMR03DT<\/a><\/strong>. Questi interverranno una volta raggiunta la temperatura, andranno a chiudere il contatto che azioner\u00e0 una <strong>segnalazione\u00a0<\/strong>(acustica, luminosa o altro). Intanto il <strong>PTC<\/strong> manterr\u00e0 la temperatura e non si ripristiner\u00e0 fintanto che non verr\u00e0 scollegato manualmente e volontariamente dall\u2019alimentazione elettrica.<\/p>\n\n\n\n<p class=\"has-text-color has-link-color wp-elements-12 wp-block-paragraph\" style=\"color:#222222;font-size:16px\">Ogni progetto ha le sue criticit\u00e0, ogni criticit\u00e0 la sua soluzione. E uno staff preparato e presente sul mercato come quello di <strong>R&amp;D Components<\/strong> \u00e8 la scelta migliore per trovare il prodotto pi\u00f9 adatto a qualsiasi applicazione.<\/p>\n\n\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n<\/div><\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Una macchina o un apparecchio si surriscaldano e improvvisamente si fermano, mettendo la macchina a riposo e consentendo alla temperatura di tornare alla normalit\u00e0. Noi sappiamo che questo accade perch\u00e9 \u00e8 intervenuto un termostato, o altro dispositivo simile. Ma se non fossimo posizionati in prossimit\u00e0&#8230;<\/p>\n","protected":false},"author":2,"featured_media":13063,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[239,236],"tags":[1467,1465,1461,1463],"class_list":["post-19656","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-funzionamento-tecnico","category-prodotti","tag-am03dt","tag-amr03dt","tag-dispositivo","tag-intervento"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>#235 COME SAPPIAMO SE IL DISPOSITIVO \u00c8 INTERVENUTO? -<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/rdcomponents.com\/site\/2026\/09\/24\/235-come-sappiamo-se-il-dispositivo-e-intervenuto\/\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"#235 COME SAPPIAMO SE IL DISPOSITIVO \u00c8 INTERVENUTO? -\" \/>\n<meta property=\"og:description\" content=\"Una macchina o un apparecchio si surriscaldano e improvvisamente si fermano, mettendo la macchina a riposo e consentendo alla temperatura di tornare alla normalit\u00e0. Noi sappiamo che questo accade perch\u00e9 \u00e8 intervenuto un termostato, o altro dispositivo simile. 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Ma se non fossimo posizionati in prossimit\u00e0...","og_url":"https:\/\/rdcomponents.com\/site\/2026\/09\/24\/235-come-sappiamo-se-il-dispositivo-e-intervenuto\/","og_site_name":"R&amp;d Components Srl","article_published_time":"2026-09-24T12:00:00+00:00","article_modified_time":"2026-10-12T15:57:04+00:00","og_image":[{"width":850,"height":563,"url":"https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2022\/07\/Bulbi-e1662972367627.jpg","type":"image\/jpeg"}],"author":"Roberto Ferranti","twitter_card":"summary_large_image","twitter_misc":{"Scritto da":"Roberto Ferranti","Tempo di lettura stimato":"4 minuti"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/rdcomponents.com\/site\/2026\/09\/24\/235-come-sappiamo-se-il-dispositivo-e-intervenuto\/#article","isPartOf":{"@id":"https:\/\/rdcomponents.com\/site\/2026\/09\/24\/235-come-sappiamo-se-il-dispositivo-e-intervenuto\/"},"author":{"name":"Roberto 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Ferranti","author_link":"https:\/\/rdcomponents.com\/site\/author\/roberto\/"},"rttpg_comment":0,"rttpg_category":"<a href=\"https:\/\/rdcomponents.com\/site\/category\/funzionamento-tecnico\/\" rel=\"category tag\">Funzionamento tecnico<\/a> <a href=\"https:\/\/rdcomponents.com\/site\/category\/prodotti\/\" rel=\"category tag\">Prodotti<\/a>","rttpg_excerpt":"Una macchina o un apparecchio si surriscaldano e improvvisamente si fermano, mettendo la macchina a riposo e consentendo alla temperatura di tornare alla normalit\u00e0. Noi sappiamo che questo accade perch\u00e9 \u00e8 intervenuto un termostato, o altro dispositivo simile. Ma se non fossimo posizionati in prossimit\u00e0...","_links":{"self":[{"href":"https:\/\/rdcomponents.com\/site\/wp-json\/wp\/v2\/posts\/19656","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rdcomponents.com\/site\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rdcomponents.com\/site\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rdcomponents.com\/site\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/rdcomponents.com\/site\/wp-json\/wp\/v2\/comments?post=19656"}],"version-history":[{"count":7,"href":"https:\/\/rdcomponents.com\/site\/wp-json\/wp\/v2\/posts\/19656\/revisions"}],"predecessor-version":[{"id":19665,"href":"https:\/\/rdcomponents.com\/site\/wp-json\/wp\/v2\/posts\/19656\/revisions\/19665"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/rdcomponents.com\/site\/wp-json\/wp\/v2\/media\/13063"}],"wp:attachment":[{"href":"https:\/\/rdcomponents.com\/site\/wp-json\/wp\/v2\/media?parent=19656"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rdcomponents.com\/site\/wp-json\/wp\/v2\/categories?post=19656"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rdcomponents.com\/site\/wp-json\/wp\/v2\/tags?post=19656"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}