{"id":14104,"date":"2023-09-18T00:07:52","date_gmt":"2023-09-18T00:07:52","guid":{"rendered":"https:\/\/www.rayzeek.com\/?p=14104"},"modified":"2023-12-26T08:44:13","modified_gmt":"2023-12-26T08:44:13","slug":"what-is-harmonic","status":"publish","type":"post","link":"https:\/\/www.rayzeek.com\/it\/glossario\/che-cose-larmonica","title":{"rendered":"Che cos'\u00e8 l'Armonica"},"content":{"rendered":"<h2 class=\"wp-block-heading\" id=\"h-what-is-harmonic\">Che cos'\u00e8 l'Armonica<\/h2><p>Nel settore dell'illuminazione, il termine \"armonica\" si riferisce a una componente di un segnale periodico distorto o non sinusoidale che ha una frequenza che \u00e8 un multiplo intero non nullo della frequenza fondamentale del segnale. Le armoniche possono essere presenti nelle correnti o nelle tensioni e sono tipicamente causate da carichi non lineari nel sistema elettrico.<\/p><div class=\"insert_portfolio_outer_wrapper\"><h3>Ispiratevi ai portafogli dei sensori di movimento Rayzeek.<\/h3><p>Non trovate quello che volete? Non preoccupatevi. Ci sono sempre modi alternativi per risolvere i vostri problemi. Forse uno dei nostri portafogli pu\u00f2 aiutarvi.<\/p><div class = \"insert_portfolio_buttons\"><div class = \"insert_portfolio_button_wrapper\"><div><a href = \"https:\/\/www.rayzeek.com\/it\/categoria-di-prodotto\/sensori-di-movimento\"><p>Sensori di movimento PIR<\/p><\/a><\/div><\/div><div class = \"insert_portfolio_button_wrapper\"><div><a href=\"https:\/\/www.rayzeek.com\/it\/interruttori-a-sensore-di-movimento\"><p>Interruttori con sensore di movimento<\/p><\/a><\/div><\/div><div class = \"insert_portfolio_button_wrapper\"><div><a href=\"https:\/\/www.rayzeek.com\/it\/sensori-di-occupazione-e-di-posto-vacante\"><p>Sensori di presenza<\/p><\/a><\/div><\/div><div class = \"insert_portfolio_button_wrapper\"><div><a href=\"https:\/\/www.rayzeek.com\/it\/prodotti\/rz050\"><p>Sensore di movimento del condizionatore d'aria<\/p><\/a><\/div><\/div><div class = \"insert_portfolio_button_wrapper\"><div><a href=\"https:\/\/www.rayzeek.com\/it\/categoria-di-prodotto\/motion-sensor-light-strip\"><p>Strisce luminose con sensore di movimento<\/p><\/a><\/div><\/div><div class = \"insert_portfolio_button_wrapper\"><div><a href=\"https:\/\/www.rayzeek.com\/it\/categoria-di-prodotto\/dimmer-a-sensore-dc\"><p>Sensori di movimento\/dimmer a bassa tensione in c.c.<\/p><\/a><\/div><\/div><div class = \"insert_portfolio_button_wrapper\"><div><a href=\"https:\/\/www.rayzeek.com\/it\/categoria-di-prodotto\/sensori-di-movimento-wireless\"><p>Kit di sensori di movimento wireless<\/p><\/a><\/div><\/div><\/div><\/div><p>Le armoniche possono causare diversi problemi nel settore dell'illuminazione. Un problema comune \u00e8 lo sfarfallio delle luci, che pu\u00f2 verificarsi in caso di rapide fluttuazioni della corrente o della tensione di carico, in particolare nei macchinari. Esempi di macchinari che possono causare lo sfarfallio delle luci sono i motori di grandi dimensioni in fase di avvio, i macchinari dotati di cicloconvertitori, come gli azionamenti dei laminatoi e gli avvolgitori delle miniere, e i macchinari che utilizzano convertitori di frequenza statici, come i motori CA e i forni elettrici ad arco.<\/p><p>Un altro problema causato dalle armoniche \u00e8 il surriscaldamento dei trasformatori e l'intervento degli interruttori. Ci\u00f2 si verifica quando i carichi non lineari assorbono la corrente con impulsi bruschi anzich\u00e9 in modo sinusoidale regolare. Le correnti armoniche generate da questi carichi non lineari possono rifluire in altre parti del sistema elettrico, provocando il surriscaldamento dei trasformatori e l'intervento degli interruttori.<\/p><p>Per misurare la presenza di armoniche, si utilizza spesso la distorsione armonica totale (THD). La THD \u00e8 la somma di tutti gli effetti armonici e viene solitamente misurata fino al 50\u00b0 multiplo della frequenza fondamentale (60 Hz negli Stati Uniti) o a 3 kHz. Si raccomanda che gli effetti armonici della tensione siano inferiori all'8% rispetto alla frequenza fondamentale e che i valori superiori all'8% siano oggetto di ulteriori indagini.<\/p><div class=\"insert_inquiry_outer_wrapper\"><h3>Cercate soluzioni per il risparmio energetico attivate dal movimento?<\/h3><p>Contattateci per avere sensori di movimento PIR completi, prodotti per il risparmio energetico attivati dal movimento, interruttori per sensori di movimento e soluzioni commerciali Occupancy\/Vacancy.<\/p><div class = \"insert_inquiry_buttons\"><div class = \"insert_inquiry_button_wrapper insert_inquiry_button_email\"><div><a href = \"mailto:info@rayzeek.com\"><p>Inviare un'e-mail<\/p><\/a><\/div><\/div><div class = \"insert_inquiry_button_wrapper insert_inquiry_button_email_contact\"><div><a href=\"https:\/\/www.rayzeek.com\/it\/contatto\"><p>Modulo di contatto<\/p><\/a><\/div><\/div><div class = \"insert_inquiry_button_wrapper insert_inquiry_button_chat chat_jump\"><div><a href=\"#\"><p>Conversare in linea<\/p><\/a><\/div><\/div><\/div><\/div><div class=\"wp-block-group glossary_faqs\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\"><h2 class=\"wp-block-heading\" id=\"h-frequently-asked-questions\">Domande frequenti<\/h2>\n\n<div class=\"wp-block-group glossary_faq\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\"><div class=\"wp-block-group glossary_faq_q\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\"><h3 class=\"wp-block-heading\" id=\"h-what-causes-electrical-harmonics\">Cosa provoca le armoniche elettriche<\/h3><\/div><\/div>\n\n<div class=\"wp-block-group glossary_faq_a\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\"><p>Le armoniche si verificano in presenza di carichi non lineari che convertono la tensione di linea CA in CC. Queste armoniche entrano nel sistema elettrico a causa della presenza di dispositivi elettronici di commutazione non lineari, come gli azionamenti a frequenza variabile (VFD), gli alimentatori per computer e l'illuminazione ad alta efficienza energetica.<\/p><\/div><\/div><\/div><\/div>\n\n<div class=\"wp-block-group glossary_faq\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\"><div class=\"wp-block-group glossary_faq_q\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\"><h3 class=\"wp-block-heading\" id=\"h-does-led-lighting-cause-harmonics\">L'illuminazione a LED causa armoniche<\/h3><\/div><\/div>\n\n<div class=\"wp-block-group glossary_faq_a\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\"><p>Con l'installazione dell'illuminazione a LED, \u00e8 possibile che il carico produca una distorsione armonica. Questa distorsione pu\u00f2 portare a sollecitazioni delle apparecchiature e della rete di distribuzione elettrica, con conseguenti maggiori spese di manutenzione e tempi di inattivit\u00e0. \u00c8 importante notare che a volte gli effetti dello stress armonico possono non essere evidenti fino a quando non si verifica un guasto completo dell'apparecchiatura.<\/p><\/div><\/div><\/div><\/div>\n\n<div class=\"wp-block-group glossary_faq\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\"><div class=\"wp-block-group glossary_faq_q\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\"><h3 class=\"wp-block-heading\" id=\"h-how-does-harmonics-affect-power-quality\">Come le armoniche influiscono sulla qualit\u00e0 dell'alimentazione<\/h3><\/div><\/div>\n\n<div class=\"wp-block-group glossary_faq_a\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\"><p>Le correnti armoniche hanno un impatto negativo sulla qualit\u00e0 dell'alimentazione, in quanto causano un aumento della corrente efficace nei sistemi elettrici. Questo, a sua volta, porta a un deterioramento della qualit\u00e0 della tensione di alimentazione. Inoltre, le armoniche sottopongono a stress la rete elettrica e possono danneggiare le apparecchiature. Possono anche disturbare il normale funzionamento dei dispositivi e comportare un aumento dei costi operativi.<\/p><\/div><\/div><\/div><\/div>\n\n<div class=\"wp-block-group glossary_faq\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\"><div class=\"wp-block-group glossary_faq_q\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\"><h3 class=\"wp-block-heading\" id=\"h-how-do-you-check-harmonics-in-a-power-system\">Come si controllano le armoniche in un sistema di alimentazione?<\/h3><\/div><\/div>\n\n<div class=\"wp-block-group glossary_faq_a\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\"><p>Misurare la distorsione armonica totale (THD) utilizzando una pinza amperometrica in grado di indicare le armoniche. Assicurarsi che il THD per la tensione non superi il 5%, mentre il THD per la corrente pu\u00f2 essere notevolmente superiore. Per avere un'idea pi\u00f9 precisa dell'entit\u00e0 e dell'impatto di ciascuna armonica, utilizzare un analizzatore di qualit\u00e0 dell'alimentazione.<\/p><\/div><\/div><\/div><\/div>\n\n<div class=\"wp-block-group glossary_faq\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\"><div class=\"wp-block-group glossary_faq_q\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\"><h3 class=\"wp-block-heading\" id=\"h-does-harmonics-affect-voltage\">Le armoniche influiscono sulla tensione<\/h3><\/div><\/div>\n\n<div class=\"wp-block-group glossary_faq_a\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\"><p>Le tensioni armoniche, che si producono quando le correnti armoniche scorrono contro l'impedenza dell'armonica, possono provocare notevoli sovratensioni. Queste sovratensioni sono state osservate come causa di malfunzionamenti delle apparecchiature e i condensatori sono particolarmente vulnerabili a questi effetti.<\/p><\/div><\/div><\/div><\/div><\/div><\/div>","protected":false},"excerpt":{"rendered":"<p>Nel settore dell'illuminazione, il termine \"armonica\" si riferisce a una componente di un segnale periodico distorto o non sinusoidale che ha una frequenza che \u00e8 un multiplo intero non nullo della frequenza fondamentale del segnale.<\/p>","protected":false},"author":4,"featured_media":12868,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"article_term":"","article_term_alternate":"","article_term_def":"","article_hook":"","auto_links":"[{\"keyword\": \"lighting industry\", \"idxall\": 1, \"keywordtitlesimi\": 0.7885549306869507, \"keywordslugsimi\": 0.7885549306869507, \"paratitlesimi\": 0.6529279321432114, \"paraslugsimi\": 0.6529279321432114, \"slug\": \"tips-for-increasing-the-efficiency-of-commercial-lighting\", \"title\": \"Tips for Increasing the Efficiency of Commercial Lighting\", \"id\": 10327}, {\"keyword\": \"60 Hz\", \"idxall\": 0, \"keywordtitlesimi\": 0.7806369662284851, \"keywordslugsimi\": 0.7707458734512329, \"paratitlesimi\": 0.6719734072685242, \"paraslugsimi\": 0.6530662775039673, \"slug\": \"what-is-hertz-hz\", \"title\": \"What is Hertz (Hz)\", \"id\": 14300}]","article_topic":"","article_fact_check":"","mt_social_share":"","mt_content_meta":"","mt_glossary_display":"","glossary_heading":"","glossary":"harmonic","glossary_alter":"","glossary_def":"","article_task":"","footnotes":""},"categories":[102],"tags":[99],"class_list":["post-14104","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-glossary","tag-glossary"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>What is Harmonic - Rayzeek<\/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:\/\/www.rayzeek.com\/it\/glossario\/che-cose-larmonica\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What is Harmonic - Rayzeek\" \/>\n<meta property=\"og:description\" content=\"In the lighting industry, the term &#8220;harmonic&#8221; 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