{"id":16918,"date":"2025-01-23T14:00:00","date_gmt":"2025-01-23T13:00:00","guid":{"rendered":"https:\/\/rdcomponents.com\/site\/?p=16918"},"modified":"2025-03-06T08:59:25","modified_gmt":"2025-03-06T07:59:25","slug":"158-contatti-in-scambio","status":"publish","type":"post","link":"https:\/\/rdcomponents.com\/site\/2025\/01\/23\/158-contatti-in-scambio\/","title":{"rendered":"#158 Contatti in scambio"},"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\" style=\"flex-basis:100%\">\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\" style=\"flex-basis:100%\">\n<p class=\"wp-block-paragraph\" style=\"font-size:16px\">Il termine \u201c<strong>contatti in scambio<\/strong>\u201d viene utilizzato per indicare un contatto che apre un circuito e contemporaneamente va a chiuderne un altro. Ma quali sono i dispositivi di controllo della temperatura che possono svolgere questo tipo di lavoro?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"font-size:16px\">Per semplificare al massimo questo concetto mi rifar\u00f2 a un gioco, oggi passione per modellisti, che andava molto tra la fine degli anni Settanta e l\u2019inizio degli Ottanta. Ero molto piccolo ma tra i miei giocattoli c\u2019erano anche i trenini elettrici della&nbsp;<strong>LIMA<\/strong>. La scatola conteneva il treno, in genere una motrice elettrica e uno o due vagoni, un trasformatore e i binari, anche quelli particolari, il \u201cbinario morto\u201d per il fine corsa, e il binario con lo scambio. Quest\u2019ultimo fa al caso nostro. Il trenino, ad azionamento elettrico, correva lungo i binari, anche attraverso quello in scambio, proseguendo lungo il percorso costruito ma, deviando lo scambio dei binari, prendeva un\u2019altra direzione.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"font-size:16px\">Ecco, lo so di aver banalizzato il concetto in modo imbarazzante. Ma questo \u00e8 quello che realmente succede, con la\u00a0<strong>corrente elettrica<\/strong>\u00a0(il treno), che percorre il\u00a0<strong>circuito elettrico<\/strong>\u00a0(le rotaie). Ma quando<strong> <a href=\"https:\/\/rdcomponents.com\/site\/2021\/09\/13\/2-che-cosa-provoca-lapertura-e-la-chiusura-dei-contatti\/\" target=\"_blank\" rel=\"noreferrer noopener\">il bimetallo interviene e si apre il\u00a0contatto<\/a>\u00a0<\/strong>se, come nel nostro esempio, siamo in presenza di un\u00a0<strong>contatto in scambio<\/strong>\u00a0(lo scambio del binario o deviatoio) la corrente prender\u00e0 un \u2018altra direzione ed andr\u00e0 ad alimentare un altro circuito.\u00a0<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"font-size:16px\">Un contatto di questo genere <a href=\"https:\/\/rdcomponents.com\/site\/2022\/12\/15\/62-da-spst-a-3pst\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>viene definito\u00a0SPDT<\/strong><\/a>. Ossia <strong>Single Pole Double Throw<\/strong>\u00a0con\u00a0<strong>1 input<\/strong>\u00a0e\u00a0<strong>2 output<\/strong>. La corrente entra in una direzione e ha due potenziali vie d\u2019uscita\u2026sempre per restare in esempi molto elementari.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\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=\"344\" height=\"285\" src=\"https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2025\/02\/Schema-SPDT.jpg\" alt=\"contatti in scambio\" class=\"wp-image-16920\" style=\"width:450px\" srcset=\"https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2025\/02\/Schema-SPDT.jpg 344w, https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2025\/02\/Schema-SPDT-300x249.jpg 300w, https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2025\/02\/Schema-SPDT-121x100.jpg 121w\" sizes=\"auto, (max-width: 344px) 100vw, 344px\" \/><\/figure>\n<\/div>\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"font-size:16px\">Questo tipo di circuito pu\u00f2 essere presente nei protettori termici. Ad esempio nei modelli\u00a0<a href=\"https:\/\/rdcomponents.com\/site\/protettori-contatti-scambio\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>AM03DT<\/strong><\/a> e <a href=\"https:\/\/rdcomponents.com\/site\/2023\/02\/09\/68-protettori-termici-con-contatti-in-scambio-e-riarmo-elettrico\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>addirittura\u00a0AMR03DT<\/strong><\/a><strong>\u00a0<\/strong>che sono dotati di un\u00a0<strong>PTC\u00a0<\/strong>che agisce anche come <a href=\"https:\/\/rdcomponents.com\/site\/2022\/04\/07\/30-protettori-termici-a-riarmo-elettrico\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>protettore termico a riarmo elettrico<\/strong><\/a>. Quindi, una volta intervenuto il protettore, il contatto va ad aprire un secondo circuito che rester\u00e0 aperto fintanto che non si decider\u00e0 di scollegarlo manualmente dalla fonte di alimentazione. Ma dove viene fatto maggior uso del sistema\u00a0<strong>SPDT\u00a0<\/strong>\u00e8 nei\u00a0<a href=\"https:\/\/rdcomponents.com\/site\/termostati-a-bulbo\/\" target=\"_blank\" rel=\"noreferrer noopener sponsored nofollow\"><strong>termostati a bulbo<\/strong><\/a>\u00a0come il modello\u00a0<a href=\"https:\/\/rdcomponents.com\/site\/bulbi-altri\/#za\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>ZA<\/strong><\/a>. Hanno un largo campo di applicazioni nei forni o nei piani cottura, ad esempio, offrendo la possibilit\u00e0 di impostare una temperatura. E una volta raggiunta la medesima interrompere il passaggio di corrente e azionare contemporaneamente una ventola oppure una spia luminosa.\u00a0<\/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-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"328\" src=\"https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2025\/02\/ZAAMR-1024x328.png\" alt=\"contatti in scambio\" class=\"wp-image-16921\" style=\"width:1100px\" srcset=\"https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2025\/02\/ZAAMR-1024x328.png 1024w, https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2025\/02\/ZAAMR-300x96.png 300w, https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2025\/02\/ZAAMR-150x48.png 150w, https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2025\/02\/ZAAMR-768x246.png 768w, https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2025\/02\/ZAAMR-1536x492.png 1536w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"font-size:16px\">Le occasioni per poter scegliere di muoversi in un circuito con contatti in scambio non mancano di certo. E, come sempre accade, le scelte devono essere fatte dai responsabili tecnici o dai progettisti, vero fulcro del progresso tecnologico.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"font-size:16px\">Le applicazioni sono innumerevoli. Come le soluzioni che <strong>R&amp;D Components<\/strong>\u00a0pu\u00f2 offrire\u00a0a tutti coloro che hanno l\u2019ambizione di sviluppare nuovi progetti per trovare nuove soluzioni, nuove idee e superare nuovi confini. E andare veramente avanti.<\/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","protected":false},"excerpt":{"rendered":"<p>Il termine \u201ccontatti in scambio\u201d viene utilizzato per indicare un contatto che apre un circuito e contemporaneamente va a chiuderne un altro. Ma quali sono i dispositivi di controllo della temperatura che possono svolgere questo tipo di lavoro? Per semplificare al massimo questo concetto mi&#8230;<\/p>\n","protected":false},"author":2,"featured_media":16925,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[239,236],"tags":[281,1233,154],"class_list":["post-16918","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-funzionamento-tecnico","category-prodotti","tag-protettore-termico","tag-protettori-a-terna","tag-temperatura"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>#158 Contatti in scambio -<\/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\/2025\/01\/23\/158-contatti-in-scambio\/\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"#158 Contatti in scambio -\" \/>\n<meta property=\"og:description\" content=\"Il termine \u201ccontatti in scambio\u201d viene utilizzato per indicare un contatto che apre un circuito e contemporaneamente va a chiuderne un altro. 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Ferranti"},"sameAs":["http:\/\/rdcomponents.com\/site\/"],"url":"https:\/\/rdcomponents.com\/site\/author\/roberto\/"}]}},"rttpg_featured_image_url":{"full":["https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2025\/03\/ZA-scaled-e1741247880336.jpg",2560,1442,false],"landscape":["https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2025\/03\/ZA-scaled-e1741247880336.jpg",2560,1442,false],"portraits":["https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2025\/03\/ZA-scaled-e1741247880336.jpg",2560,1442,false],"thumbnail":["https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2025\/03\/ZA-scaled-e1741247880336-150x84.jpg",150,84,true],"medium":["https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2025\/03\/ZA-scaled-e1741247880336-300x169.jpg",300,169,true],"large":["https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2025\/03\/ZA-scaled-e1741247880336-1024x577.jpg",1024,577,true],"1536x1536":["https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2025\/03\/ZA-scaled-e1741247880336-1536x865.jpg",1536,865,true],"2048x2048":["https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2025\/03\/ZA-scaled-e1741247880336-2048x1154.jpg",2048,1154,true],"cornerstone_mikado_square":["https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2025\/03\/ZA-scaled-e1741247880336-550x550.jpg",550,550,true],"cornerstone_mikado_landscape":["https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2025\/03\/ZA-scaled-e1741247880336-800x600.jpg",800,600,true],"cornerstone_mikado_portrait":["https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2025\/03\/ZA-scaled-e1741247880336-600x800.jpg",600,800,true],"cornerstone_mikado_large_width":["https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2025\/03\/ZA-scaled-e1741247880336-1125x550.jpg",1125,550,true],"cornerstone_mikado_large_height":["https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2025\/03\/ZA-scaled-e1741247880336-550x1125.jpg",550,1125,true],"cornerstone_mikado_large_width_height":["https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2025\/03\/ZA-scaled-e1741247880336-1125x1125.jpg",1125,1125,true]},"rttpg_author":{"display_name":"Roberto 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":"Il termine \u201ccontatti in scambio\u201d viene utilizzato per indicare un contatto che apre un circuito e contemporaneamente va a chiuderne un altro. Ma quali sono i dispositivi di controllo della temperatura che possono svolgere questo tipo di lavoro? Per semplificare al massimo questo concetto mi...","_links":{"self":[{"href":"https:\/\/rdcomponents.com\/site\/wp-json\/wp\/v2\/posts\/16918","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=16918"}],"version-history":[{"count":0,"href":"https:\/\/rdcomponents.com\/site\/wp-json\/wp\/v2\/posts\/16918\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/rdcomponents.com\/site\/wp-json\/wp\/v2\/media\/16925"}],"wp:attachment":[{"href":"https:\/\/rdcomponents.com\/site\/wp-json\/wp\/v2\/media?parent=16918"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rdcomponents.com\/site\/wp-json\/wp\/v2\/categories?post=16918"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rdcomponents.com\/site\/wp-json\/wp\/v2\/tags?post=16918"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}