{"id":14400,"date":"2023-10-12T14:00:00","date_gmt":"2023-10-12T12:00:00","guid":{"rendered":"https:\/\/rdcomponents.com\/site\/?p=14400"},"modified":"2026-06-03T10:57:02","modified_gmt":"2026-06-03T08:57:02","slug":"99-le-assicurazioni-della-sicurezza","status":"publish","type":"post","link":"https:\/\/rdcomponents.com\/site\/2023\/10\/12\/99-le-assicurazioni-della-sicurezza\/","title":{"rendered":"#99 &#8211; Le assicurazioni della sicurezza"},"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\">Quante volte abbiamo sentito la frase \u201c<em>chi controlla il controllore<\/em>?\u201d. E quante volte i casi di cronaca ci hanno raccontato di controllori assunti, dopo i controlli, dai controllati? Sembra quasi uno scioglilingua ma purtroppo \u00e8 l\u2019apoteosi&nbsp;della&nbsp;corruzione. Ecco, quando c\u2019\u00e8 di mezzo la tecnologia questo non succede.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"font-size:16px\">Sono molti i casi in cui la normativa prevede l\u2019uso di una\u00a0sicurezza\u00a0elettrica. A seconda dell\u2019applicazione, del prodotto e dell\u2019utilizzo che ne viene fatto possiamo usare termostati bimetallici a riarmo manuale come i\u00a0<a href=\"https:\/\/rdcomponents.com\/site\/termostati-bimetallici\/#tk32\" target=\"_blank\" rel=\"noreferrer noopener\">TK32<\/a>, i\u00a0<a href=\"https:\/\/rdcomponents.com\/site\/termofusibili\/\" target=\"_blank\" rel=\"noreferrer noopener\">termofusibili<\/a>, i\u00a0<a href=\"https:\/\/rdcomponents.com\/site\/riarmo-elettrico\/\" target=\"_blank\" rel=\"noreferrer noopener\">protettori termici a riarmo elettrico<\/a>, oppure i\u00a0<a href=\"https:\/\/rdcomponents.com\/site\/tecasa\/#sb\" target=\"_blank\" rel=\"noreferrer noopener\">termostati a bulbo a riarmo manuale<\/a>. Proprio di quest\u2019ultimo prodotto vorrei parlarvi.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"font-size:16px\"><a href=\"https:\/\/rdcomponents.com\/site\/2022\/05\/19\/36-termostati-a-bulbo\/\" target=\"_blank\" rel=\"noreferrer noopener\">In&nbsp;questo articolo<\/a> descrivevo il funzionamento del termostato a bulbo regolabile. Quello di&nbsp;sicurezza&nbsp;funziona fondamentalmente nella stessa maniera ma \u00e8 tarato su un\u2019unica temperatura e il riarmo \u00e8 affidato a un pulsante anzich\u00e9 essere automatico. Alla base del funzionamento c&#8217;\u00e8 un liquido oleoso che con l&#8217;aumentare&nbsp;della&nbsp;temperatura espande il suo volume il quale, agendo su una membrana flessibile fa azionare uno o pi\u00f9 contatti elettrici, a seconda che il termostato sia unipolare, bipolare oppure tripolare (<em>Trifase<\/em>).<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n\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=\"1000\" height=\"560\" src=\"https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2023\/11\/WQB.jpg\" alt=\"sicurezza\" class=\"wp-image-14401\" style=\"width:750px;height:420px\" srcset=\"https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2023\/11\/WQB.jpg 1000w, https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2023\/11\/WQB-300x168.jpg 300w, https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2023\/11\/WQB-768x430.jpg 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n<\/div>\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"font-size:16px\">Essendo composto da un sensore, un capillare (di dimensioni variabili secondo&nbsp;le&nbsp;richieste dei clienti) e di un corpo, \u00e8 possibile rilevare la temperatura in un punto critico, mantenendo il corpo dei contatti elettrici a distanza sicura, in una posizione protetta da polveri, umidit\u00e0 oppure da agenti aggressivi, dove l\u2019utilizzatore non rischia di ustionarsi.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"font-size:16px\">Questo \u00e8 uno dei motivi per cui un termostato come il modello\u00a0<strong><a href=\"https:\/\/rdcomponents.com\/site\/tecasa\/#vc\" target=\"_blank\" rel=\"noreferrer noopener\">VC<\/a><\/strong>, disponibile sia in <a href=\"https:\/\/rdcomponents.com\/site\/2022\/12\/15\/62-da-spst-a-3pst\/\" target=\"_blank\" rel=\"noreferrer noopener\">versione\u00a0<strong>DPST\u00a0<\/strong>che\u00a0<strong>3PST<\/strong><\/a>, trova larga applicazione nel mondo degli elettrodomestici professionali. Tra questi sicuramente domina il settore\u00a0delle\u00a0macchine per caff\u00e8.\u00a0<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"font-size:16px\">Stiamo parlando di un sistema di&nbsp;sicurezza&nbsp;che deve intervenire in caso di avarie e malfunzionamenti per interrompere il passaggio di corrente e di conseguenza evitare che l\u2019anomalia degeneri in qualcosa di compromettente se non addirittura pericoloso. Ma tornando al titolo, chi ci assicura che questa&nbsp;sicurezza&nbsp;faccia correttamente il suo lavoro?<\/p>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<\/div><\/div>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"527\" src=\"https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2023\/11\/VC.jpg\" alt=\"sicurezza\" class=\"wp-image-14405\" style=\"width:750px;height:395px\" srcset=\"https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2023\/11\/VC.jpg 1000w, https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2023\/11\/VC-300x158.jpg 300w, https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2023\/11\/VC-768x405.jpg 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n<\/div>\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"font-size:16px\">Un buon termostato, con prestazioni nella media, sicuramente interviene regolarmente e correttamente, su questo si pu\u00f2 essere certi, cos\u00ec come una persona onesta si comporta sempre in modo corretto, non voglio allarmare nessuno. Tuttavia, un termostato ad alta qualit\u00e0 ha due caratteristiche che i pi\u00f9 modesti non hanno.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"font-size:16px\">La prima \u00e8 la&nbsp;<em>temperatura massima che pu\u00f2 sopportare il sensore senza danneggiarsi<\/em>. Restando nel mondo&nbsp;delle&nbsp;macchine per caff\u00e8, alcuni tecnici, in fase di omologazione, eseguono un test a dir poco devastante. Escludendo totalmente la presenza di acqua nella caldaia avviano la macchina alla massima potenza. In meno di 10 secondi si raggiunge la temperatura d\u2019intervento che mediamente va dai&nbsp;<strong>150\u00b0C<\/strong>&nbsp;ai&nbsp;<strong>170\u00b0C<\/strong>. Il termostato cos\u00ec interviene, ma l\u2019<a href=\"https:\/\/rdcomponents.com\/site\/2022\/06\/30\/41-inerzia-termica\/\" target=\"_blank\" rel=\"noreferrer noopener\">inerzia termica<\/a>&nbsp;porta la temperatura&nbsp;<strong>oltre i 200\u00b0C<\/strong>. Un termostato a medie prestazioni ha una temperatura massima che \u00e8 di circa&nbsp;<strong>10-15%<\/strong>&nbsp;in pi\u00f9 rispetto alla temperatura d\u2019intervento. Quello che succede \u00e8 che sicuramente interviene e salvaguarda la macchina, per\u00f2 il bulbo si danneggia e il termostato non riarma pi\u00f9, ed \u00e8 da sostituire. In questa circostanza si \u00e8 comportato come se fosse un termofusibile, ma 100 volte pi\u00f9 caro. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"font-size:16px\">Questo appena descritto per\u00f2 \u00e8 un caso limite e, a dirla tutta, difficilmente trovabile nel mondo reale. Tuttavia situazioni in cui si possa presentare una forte inerzia termica non mancano di certo.&nbsp; &nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"font-size:16px\">La seconda caratteristica \u00e8 la presenza di un sistema di&nbsp;<em><strong>Fail Safe<\/strong><\/em>, letteralmente \u201c<em>a prova di errore<\/em>\u201d. Questo \u00e8 pi\u00f9 comunemente conosciuto come \u201c<strong>Sicurezza&nbsp;intrinseca<\/strong>\u201d o \u201c<strong>Sicurezza&nbsp;positiva<\/strong>\u201d. Si tratta di un meccanismo interno che blocca il termostato, mettendolo in posizione&nbsp;<strong>Off&nbsp;<\/strong>qualora il capillare o il bulbo si dovessero rompere o guastare, o pi\u00f9 semplicemente qualora dovessero esserci perdite del liquido di espansione. Ci\u00f2 evita dunque che ci siano starature e interventi fuori tolleranza piuttosto che uno stallo e il termostato che non interviene.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"font-size:16px\">Come si diceva, queste due ulteriori garanzie\u00a0le\u00a0si trovano solo nei termostati a bulbo di alto livello come i nostri\u00a0<a href=\"https:\/\/rdcomponents.com\/site\/bulbi-altri\/#wqb\" target=\"_blank\" rel=\"noreferrer noopener\">WQB<\/a>\u00a0e\u00a0<a href=\"https:\/\/rdcomponents.com\/site\/tecasa\/#vc\" target=\"_blank\" rel=\"noreferrer noopener\">VC<\/a>.\u00a0<\/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\">Scarica l&#8217;articolo in versione stampabile cliccando qui sotto!<\/p>\n\n\n\n<div class=\"wp-block-file\"><a id=\"wp-block-file--media-0228ef90-5c65-4f73-9050-7ecc3a3cd160\" href=\"https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2024\/09\/99-LE-ASSICURAZIONI-SULLA-SICUREZZA.jpg\" target=\"_blank\" rel=\"noreferrer noopener\">99-LE-ASSICURAZIONI-SULLA-SICUREZZA<\/a><a href=\"https:\/\/rdcomponents.com\/site\/wp-content\/uploads\/2024\/09\/99-LE-ASSICURAZIONI-SULLA-SICUREZZA.jpg\" class=\"wp-block-file__button wp-element-button\" download aria-describedby=\"wp-block-file--media-0228ef90-5c65-4f73-9050-7ecc3a3cd160\">Download<\/a><\/div>\n\n\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Quante volte abbiamo sentito la frase \u201cchi controlla il controllore?\u201d. E quante volte i casi di cronaca ci hanno raccontato di controllori assunti, dopo i controlli, dai controllati? Sembra quasi uno scioglilingua ma purtroppo \u00e8 l\u2019apoteosi&nbsp;della&nbsp;corruzione. Ecco, quando c\u2019\u00e8 di mezzo la tecnologia questo non&#8230;<\/p>\n","protected":false},"author":2,"featured_media":14404,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[239,236],"tags":[122,345,346],"class_list":["post-14400","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-funzionamento-tecnico","category-prodotti","tag-sicurezza","tag-vc","tag-wqb"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>#99 - Le assicurazioni della sicurezza -<\/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\/2023\/10\/12\/99-le-assicurazioni-della-sicurezza\/\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"#99 - Le assicurazioni della sicurezza -\" \/>\n<meta property=\"og:description\" content=\"Quante volte abbiamo sentito la frase \u201cchi controlla il controllore?\u201d. 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E quante volte i casi di cronaca ci hanno raccontato di controllori assunti, dopo i controlli, dai controllati? Sembra quasi uno scioglilingua ma purtroppo \u00e8 l\u2019apoteosi&nbsp;della&nbsp;corruzione. 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E quante volte i casi di cronaca ci hanno raccontato di controllori assunti, dopo i controlli, dai controllati? Sembra quasi uno scioglilingua ma purtroppo \u00e8 l\u2019apoteosi&nbsp;della&nbsp;corruzione. Ecco, quando c\u2019\u00e8 di mezzo la tecnologia questo non...","_links":{"self":[{"href":"https:\/\/rdcomponents.com\/site\/wp-json\/wp\/v2\/posts\/14400","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=14400"}],"version-history":[{"count":1,"href":"https:\/\/rdcomponents.com\/site\/wp-json\/wp\/v2\/posts\/14400\/revisions"}],"predecessor-version":[{"id":19090,"href":"https:\/\/rdcomponents.com\/site\/wp-json\/wp\/v2\/posts\/14400\/revisions\/19090"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/rdcomponents.com\/site\/wp-json\/wp\/v2\/media\/14404"}],"wp:attachment":[{"href":"https:\/\/rdcomponents.com\/site\/wp-json\/wp\/v2\/media?parent=14400"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rdcomponents.com\/site\/wp-json\/wp\/v2\/categories?post=14400"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rdcomponents.com\/site\/wp-json\/wp\/v2\/tags?post=14400"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}