{"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\/pt\/glossario\/o-que-e-a-harmonica","title":{"rendered":"O que \u00e9 Harm\u00f3nico"},"content":{"rendered":"<h2 class=\"wp-block-heading\" id=\"h-what-is-harmonic\">O que \u00e9 Harm\u00f3nico<\/h2><p>Na ind\u00fastria da ilumina\u00e7\u00e3o, o termo \"harm\u00f3nica\" refere-se a um componente de um sinal peri\u00f3dico distorcido ou n\u00e3o sinusoidal que tem uma frequ\u00eancia que \u00e9 um m\u00faltiplo inteiro par diferente de zero da frequ\u00eancia fundamental do sinal. As harm\u00f3nicas podem ocorrer em correntes ou tens\u00f5es e s\u00e3o normalmente causadas por cargas n\u00e3o lineares no sistema el\u00e9trico.<\/p><div class=\"insert_portfolio_outer_wrapper\"><h3>Inspire-se nos portf\u00f3lios de sensores de movimento Rayzeek.<\/h3><p>N\u00e3o encontra o que pretende? N\u00e3o se preocupe. H\u00e1 sempre formas alternativas de resolver os seus problemas. Talvez um dos nossos portef\u00f3lios possa ajudar.<\/p><div class = \"insert_portfolio_buttons\"><div class = \"insert_portfolio_button_wrapper\"><div><a href = \"https:\/\/www.rayzeek.com\/pt\/categoria-de-produto\/sensores-de-movimento\"><p>Sensores de movimento PIR<\/p><\/a><\/div><\/div><div class = \"insert_portfolio_button_wrapper\"><div><a href=\"https:\/\/www.rayzeek.com\/pt\/interruptores-com-sensor-de-movimento\"><p>Interruptores com sensor de movimento<\/p><\/a><\/div><\/div><div class = \"insert_portfolio_button_wrapper\"><div><a href=\"https:\/\/www.rayzeek.com\/pt\/sensores-de-ocupacao-vaga\"><p>Sensores de ocupa\u00e7\u00e3o<\/p><\/a><\/div><\/div><div class = \"insert_portfolio_button_wrapper\"><div><a href=\"https:\/\/www.rayzeek.com\/pt\/produtos\/rz050\"><p>Sensor de movimento do ar condicionado<\/p><\/a><\/div><\/div><div class = \"insert_portfolio_button_wrapper\"><div><a href=\"https:\/\/www.rayzeek.com\/pt\/categoria-de-produto\/motion-sensor-light-strip\"><p>Fitas de luz com sensor de movimento<\/p><\/a><\/div><\/div><div class = \"insert_portfolio_button_wrapper\"><div><a href=\"https:\/\/www.rayzeek.com\/pt\/categoria-de-produto\/dc-sensor-dimmer\"><p>Sensores de movimento DC de baixa tens\u00e3o\/Dimmers<\/p><\/a><\/div><\/div><div class = \"insert_portfolio_button_wrapper\"><div><a href=\"https:\/\/www.rayzeek.com\/pt\/categoria-de-produto\/sensores-de-movimento-sem-fios\"><p>Kits de sensores de movimento sem fios<\/p><\/a><\/div><\/div><\/div><\/div><p>As harm\u00f3nicas podem levar a v\u00e1rios problemas na ind\u00fastria da ilumina\u00e7\u00e3o. Um problema comum \u00e9 a cintila\u00e7\u00e3o das luzes, que pode ocorrer quando h\u00e1 flutua\u00e7\u00f5es r\u00e1pidas na corrente ou tens\u00e3o de carga, particularmente em m\u00e1quinas. Exemplos de m\u00e1quinas que podem causar luzes intermitentes incluem motores de grandes dimens\u00f5es durante o arranque, m\u00e1quinas com cicloconversores, como unidades de laminagem e bobinadoras de minas, e m\u00e1quinas que utilizam conversores de frequ\u00eancia est\u00e1ticos, como motores CA e fornos de arco el\u00e9trico.<\/p><p>Outro problema causado pelas harm\u00f3nicas \u00e9 o sobreaquecimento dos transformadores e o disparo dos disjuntores. Isto ocorre quando as cargas n\u00e3o lineares consomem corrente em impulsos abruptos em vez de o fazerem de uma forma sinusoidal suave. As correntes harm\u00f3nicas geradas por estas cargas n\u00e3o lineares podem fluir de volta para outras partes do sistema de energia, resultando no sobreaquecimento de transformadores e no disparo de disjuntores.<\/p><p>Para medir a presen\u00e7a de harm\u00f3nicas, \u00e9 frequentemente utilizada a Distor\u00e7\u00e3o Harm\u00f3nica Total (THD). A THD \u00e9 a soma de todos os efeitos harm\u00f3nicos e \u00e9 normalmente medida at\u00e9 ao 50\u00ba m\u00faltiplo da frequ\u00eancia fundamental (60 Hz nos EUA) ou a 3 kHz. Recomenda-se que os efeitos harm\u00f3nicos da tens\u00e3o sejam inferiores a 8 por cento relativamente \u00e0 frequ\u00eancia fundamental e que os valores superiores a 8 por cento sejam objeto de uma investiga\u00e7\u00e3o mais aprofundada.<\/p><div class=\"insert_inquiry_outer_wrapper\"><h3>Procura solu\u00e7\u00f5es de poupan\u00e7a de energia activadas por movimento?<\/h3><p>Contacte-nos para obter sensores de movimento PIR completos, produtos de poupan\u00e7a de energia activados por movimento, interruptores com sensor de movimento e solu\u00e7\u00f5es comerciais de Ocupa\u00e7\u00e3o\/Vazio.<\/p><div class = \"insert_inquiry_buttons\"><div class = \"insert_inquiry_button_wrapper insert_inquiry_button_email\"><div><a href = \"mailto:info@rayzeek.com\"><p>Enviar um e-mail<\/p><\/a><\/div><\/div><div class = \"insert_inquiry_button_wrapper insert_inquiry_button_email_contact\"><div><a href=\"https:\/\/www.rayzeek.com\/pt\/contacto\"><p>Formul\u00e1rio de contacto<\/p><\/a><\/div><\/div><div class = \"insert_inquiry_button_wrapper insert_inquiry_button_chat chat_jump\"><div><a href=\"#\"><p>Conversar online<\/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\">Perguntas Frequentes<\/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\">O que causa as harm\u00f3nicas el\u00e9ctricas<\/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>As harm\u00f3nicas ocorrem quando existem cargas n\u00e3o lineares que convertem a tens\u00e3o de linha CA em CC. Estas harm\u00f3nicas entram no sistema el\u00e9trico devido \u00e0 presen\u00e7a de dispositivos electr\u00f3nicos de comuta\u00e7\u00e3o n\u00e3o lineares, como variadores de frequ\u00eancia (VFD), fontes de alimenta\u00e7\u00e3o de computadores e ilumina\u00e7\u00e3o energeticamente eficiente.<\/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\">A ilumina\u00e7\u00e3o LED causa harm\u00f3nicas<\/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>Com a instala\u00e7\u00e3o de ilumina\u00e7\u00e3o LED, existe a possibilidade de surgirem distor\u00e7\u00f5es harm\u00f3nicas na carga. Esta distor\u00e7\u00e3o pode levar \u00e0 tens\u00e3o do equipamento e da rede de distribui\u00e7\u00e3o el\u00e9ctrica, resultando em maiores despesas de manuten\u00e7\u00e3o e tempo de inatividade. \u00c9 importante notar que, por vezes, os efeitos da tens\u00e3o harm\u00f3nica podem n\u00e3o ser vis\u00edveis at\u00e9 haver uma falha completa do equipamento.<\/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\">Como \u00e9 que as harm\u00f3nicas afectam a qualidade da energia<\/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>As correntes harm\u00f3nicas t\u00eam um impacto negativo na qualidade da energia, provocando um aumento da corrente r.m.s. nos sistemas el\u00e9ctricos. Isto, por sua vez, leva a uma deteriora\u00e7\u00e3o da qualidade da tens\u00e3o de alimenta\u00e7\u00e3o. Al\u00e9m disso, as harm\u00f3nicas colocam a rede el\u00e9ctrica sob tens\u00e3o e t\u00eam o potencial de danificar o equipamento. Podem tamb\u00e9m perturbar o funcionamento normal dos dispositivos e resultar em custos de funcionamento mais elevados.<\/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\">Como verificar as harm\u00f3nicas num sistema de energia<\/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>Medir a distor\u00e7\u00e3o harm\u00f3nica total (THD) utilizando uma pin\u00e7a amperim\u00e9trica que tenha a capacidade de indicar os harm\u00f3nicos. Certifique-se de que a THD para a tens\u00e3o n\u00e3o excede 5%, enquanto a THD para a corrente pode ser consideravelmente mais elevada. Para obter mais informa\u00e7\u00f5es sobre a magnitude e o impacto de cada harm\u00f3nica, utilize um analisador de qualidade de energia.<\/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\">Os harm\u00f3nicos afectam a tens\u00e3o<\/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>As tens\u00f5es harm\u00f3nicas, que s\u00e3o produzidas quando as correntes harm\u00f3nicas fluem contra a imped\u00e2ncia da harm\u00f3nica, podem resultar em sobretens\u00f5es not\u00e1veis. Observou-se que estas sobretens\u00f5es provocam o mau funcionamento de equipamentos, sendo os condensadores especialmente vulner\u00e1veis a estes efeitos.<\/p><\/div><\/div><\/div><\/div><\/div><\/div>","protected":false},"excerpt":{"rendered":"<p>Na ind\u00fastria da ilumina\u00e7\u00e3o, o termo \"harm\u00f3nica\" refere-se a um componente de um sinal peri\u00f3dico distorcido ou n\u00e3o sinusoidal que tem uma frequ\u00eancia que \u00e9 um m\u00faltiplo inteiro par diferente de zero da frequ\u00eancia fundamental do sinal.<\/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\/pt\/glossario\/o-que-e-a-harmonica\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\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; refers to a component of a distorted or non-sinusoidal periodic signal that has a frequency that is a non-zero even integer multiple of the fundamental frequency of the signal.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.rayzeek.com\/pt\/glossario\/o-que-e-a-harmonica\" \/>\n<meta property=\"og:site_name\" content=\"Rayzeek\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/bester001\/\" \/>\n<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/bester001\/\" \/>\n<meta property=\"article:published_time\" content=\"2023-09-18T00:07:52+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-12-26T08:44:13+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.rayzeek.com\/wp-content\/uploads\/2023\/06\/rayzeek-glossary-image-10.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"800\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Horace He\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@RayzeekTech\" \/>\n<meta name=\"twitter:site\" content=\"@RayzeekTech\" \/>\n<meta name=\"twitter:label1\" content=\"Escrito por\" \/>\n\t<meta name=\"twitter:data1\" content=\"Horace He\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tempo estimado de leitura\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutos\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.rayzeek.com\/glossary\/what-is-harmonic#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.rayzeek.com\/glossary\/what-is-harmonic\"},\"author\":{\"name\":\"Horace He\",\"@id\":\"https:\/\/www.rayzeek.com\/#\/schema\/person\/ff0b4bd6573444e02efc8613274549c4\"},\"headline\":\"What is Harmonic\",\"datePublished\":\"2023-09-18T00:07:52+00:00\",\"dateModified\":\"2023-12-26T08:44:13+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.rayzeek.com\/glossary\/what-is-harmonic\"},\"wordCount\":544,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/www.rayzeek.com\/#organization\"},\"image\":{\"@id\":\"https:\/\/www.rayzeek.com\/glossary\/what-is-harmonic#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.rayzeek.com\/wp-content\/uploads\/2023\/06\/rayzeek-glossary-image-10.jpg\",\"keywords\":[\"glossary\"],\"articleSection\":[\"glossary\"],\"inLanguage\":\"pt-PT\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.rayzeek.com\/glossary\/what-is-harmonic#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.rayzeek.com\/glossary\/what-is-harmonic\",\"url\":\"https:\/\/www.rayzeek.com\/glossary\/what-is-harmonic\",\"name\":\"What is Harmonic - Rayzeek\",\"isPartOf\":{\"@id\":\"https:\/\/www.rayzeek.com\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.rayzeek.com\/glossary\/what-is-harmonic#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.rayzeek.com\/glossary\/what-is-harmonic#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.rayzeek.com\/wp-content\/uploads\/2023\/06\/rayzeek-glossary-image-10.jpg\",\"datePublished\":\"2023-09-18T00:07:52+00:00\",\"dateModified\":\"2023-12-26T08:44:13+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/www.rayzeek.com\/glossary\/what-is-harmonic#breadcrumb\"},\"inLanguage\":\"pt-PT\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.rayzeek.com\/glossary\/what-is-harmonic\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"pt-PT\",\"@id\":\"https:\/\/www.rayzeek.com\/glossary\/what-is-harmonic#primaryimage\",\"url\":\"https:\/\/www.rayzeek.com\/wp-content\/uploads\/2023\/06\/rayzeek-glossary-image-10.jpg\",\"contentUrl\":\"https:\/\/www.rayzeek.com\/wp-content\/uploads\/2023\/06\/rayzeek-glossary-image-10.jpg\",\"width\":1200,\"height\":800},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.rayzeek.com\/glossary\/what-is-harmonic#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.rayzeek.com\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"What is Harmonic\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.rayzeek.com\/#website\",\"url\":\"https:\/\/www.rayzeek.com\/\",\"name\":\"Rayzeek\",\"description\":\"Motion Sensor &amp; 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