{"id":27773,"date":"2025-08-02T14:19:11","date_gmt":"2025-08-02T06:19:11","guid":{"rendered":"https:\/\/cnspd.com\/?p=27773"},"modified":"2026-04-10T13:34:31","modified_gmt":"2026-04-10T05:34:31","slug":"how-dangerous-is-a-surge-electric-event-and-what-can-you-do-about-it","status":"publish","type":"post","link":"https:\/\/www.cnspd.com\/pt\/qual-e-o-perigo-de-uma-sobretensao-electrica-e-o-que-se-pode-fazer\/","title":{"rendered":"Qu\u00e3o perigoso \u00e9 um surto el\u00e9trico e o que se pode fazer?"},"content":{"rendered":"<p data-start=\"87\" data-end=\"319\">Os picos de energia danificam silenciosamente os sistemas, interrompem a produ\u00e7\u00e3o e reduzem a vida \u00fatil do equipamento. A LEEYEE fornece solu\u00e7\u00f5es de prote\u00e7\u00e3o de n\u00edvel industrial com par\u00e2metros SPD superiores para evitar falhas el\u00e9ctricas catastr\u00f3ficas.<\/p>\n<p data-start=\"87\" data-end=\"319\"><strong>Uma sobretens\u00e3o el\u00e9ctrica \u00e9 um pico s\u00fabito e tempor\u00e1rio de tens\u00e3o que pode danificar ou destruir sistemas el\u00e9ctricos. Tem frequentemente origem num raio ou em opera\u00e7\u00f5es de comuta\u00e7\u00e3o. Os Dispositivos de Prote\u00e7\u00e3o contra Sobretens\u00f5es (DPS) ajudam a mitigar este risco, bloqueando instantaneamente o excesso de tens\u00e3o. As aplica\u00e7\u00f5es industriais exigem SPDs certificados e de resposta r\u00e1pida para garantir a seguran\u00e7a e a longevidade do sistema.<\/strong><\/p>\n<p data-start=\"87\" data-end=\"319\">Vamos explorar o significado de sobretens\u00e3o el\u00e9ctrica, as suas consequ\u00eancias e como prevenir adequadamente estas amea\u00e7as el\u00e9ctricas dispendiosas.<\/p>\n<p data-start=\"87\" data-end=\"319\"><a href=\"https:\/\/www.cnspd.com\/pt\/download-category\/all\/\" target=\"_blank\" rel=\"noopener\"><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone wp-image-26994 size-full\" src=\"https:\/\/cnspd.com\/wp-content\/uploads\/2024\/12\/BookCover-3.jpg\" alt=\"eletricidade de pico\" width=\"600\" height=\"408\" srcset=\"https:\/\/www.cnspd.com\/wp-content\/uploads\/2024\/12\/BookCover-3.jpg 600w, https:\/\/www.cnspd.com\/wp-content\/uploads\/2024\/12\/BookCover-3-150x102.jpg 150w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/a><\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_83 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">\u00cdndice<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Alternar o \u00edndice\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Alternar<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/pt\/qual-e-o-perigo-de-uma-sobretensao-electrica-e-o-que-se-pode-fazer\/#what-is-a-surge-in-electricity\" >O que \u00e9 um pico de eletricidade?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/pt\/qual-e-o-perigo-de-uma-sobretensao-electrica-e-o-que-se-pode-fazer\/#how-to-fix-an-electrical-surge\" >Como reparar uma sobretens\u00e3o el\u00e9ctrica?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/pt\/qual-e-o-perigo-de-uma-sobretensao-electrica-e-o-que-se-pode-fazer\/#what-happens-if-there-is-a-sudden-surge-of-electricity\" >O que acontece se houver um pico s\u00fabito de eletricidade?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/pt\/qual-e-o-perigo-de-uma-sobretensao-electrica-e-o-que-se-pode-fazer\/#how-to-avoid-an-electric-surge\" >Como evitar um pico de tens\u00e3o el\u00e9ctrica?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/pt\/qual-e-o-perigo-de-uma-sobretensao-electrica-e-o-que-se-pode-fazer\/#conclusion\" >Conclus\u00e3o<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/pt\/qual-e-o-perigo-de-uma-sobretensao-electrica-e-o-que-se-pode-fazer\/#why-leeyee\" >Porqu\u00ea LEEYEE?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/pt\/qual-e-o-perigo-de-uma-sobretensao-electrica-e-o-que-se-pode-fazer\/#faqs-surge-electric\" >FAQs: Sobretens\u00e3o el\u00e9ctrica<\/a><\/li><\/ul><\/nav><\/div>\n<h2 data-start=\"876\" data-end=\"910\"><span class=\"ez-toc-section\" id=\"what-is-a-surge-in-electricity\"><\/span>O que \u00e9 um pico de eletricidade?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"912\" data-end=\"1619\">Um pico de eletricidade - vulgarmente designado por <strong data-start=\"961\" data-end=\"979\">eletricidade de pico<\/strong> evento - \u00e9 um aumento brusco e breve da tens\u00e3o que excede o intervalo de funcionamento padr\u00e3o de um sistema de alimenta\u00e7\u00e3o. Por exemplo, num sistema de 220V, qualquer pico que exceda 250V \u00e9 qualificado como um pico de tens\u00e3o. Estes picos duram normalmente microssegundos, mas podem infligir danos permanentes em componentes sens\u00edveis como microprocessadores, rel\u00e9s ou inversores. As causas comuns incluem descargas atmosf\u00e9ricas, comuta\u00e7\u00e3o da rede, opera\u00e7\u00f5es de bancos de condensadores ou liga\u00e7\u00e3o \u00e0 terra defeituosa. A norma IEEE Std 1100-2005 identifica os picos de comuta\u00e7\u00e3o interna como a principal causa de degrada\u00e7\u00e3o do equipamento em ambientes industriais. O reconhecimento desta amea\u00e7a \u00e9 vital para a conce\u00e7\u00e3o de estrat\u00e9gias de prote\u00e7\u00e3o eficazes.<\/p>\n<hr data-start=\"1621\" data-end=\"1624\" \/>\n<h2 data-start=\"1626\" data-end=\"1660\"><span class=\"ez-toc-section\" id=\"how-to-fix-an-electrical-surge\"><\/span>Como reparar uma sobretens\u00e3o el\u00e9ctrica?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"1662\" data-end=\"2371\">Ap\u00f3s a ocorr\u00eancia de um pico el\u00e9trico, o restabelecimento da funcionalidade do sistema requer uma avalia\u00e7\u00e3o e uma repara\u00e7\u00e3o. Em primeiro lugar, verifique se existem sinais vis\u00edveis de danos nos quadros de controlo, fus\u00edveis ou transformadores. Os componentes danificados por sobretens\u00f5es apresentam frequentemente marcas de queimaduras ou avarias totais. Substitua imediatamente as pe\u00e7as afectadas e inspeccione as liga\u00e7\u00f5es \u00e0 terra. No entanto, a repara\u00e7\u00e3o n\u00e3o se resume apenas \u00e0 substitui\u00e7\u00e3o de pe\u00e7as - trata-se de atualizar a prote\u00e7\u00e3o contra sobretens\u00f5es. Instalar ou atualizar <strong data-start=\"2093\" data-end=\"2128\">Dispositivos de prote\u00e7\u00e3o contra sobretens\u00f5es (DPS)<\/strong> classificado para a tens\u00e3o e carga do seu sistema. Para sistemas industriais e solares, escolha SPDs com alta <strong data-start=\"2225\" data-end=\"2266\">corrente de descarga nominal (In \u2265 20kA)<\/strong>, r\u00e1pido <strong data-start=\"2273\" data-end=\"2299\">tempos de resposta (&lt;25ns)<\/strong>e <strong data-start=\"2305\" data-end=\"2342\">baixa tens\u00e3o de aperto (at\u00e9 &lt; 1,8kV)<\/strong> para evitar futuros incidentes.<\/p>\n<hr data-start=\"2373\" data-end=\"2376\" \/>\n<h2 data-start=\"2378\" data-end=\"2434\"><span class=\"ez-toc-section\" id=\"what-happens-if-there-is-a-sudden-surge-of-electricity\"><\/span>O que acontece se houver um pico s\u00fabito de eletricidade?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"2436\" data-end=\"3123\">Um pico el\u00e9trico repentino injecta energia em excesso num sistema mais rapidamente do que o isolamento ou os componentes internos conseguem suportar. Componentes electr\u00f3nicos sens\u00edveis - tais como inversores, sensores e PLCs - podem entrar em curto-circuito ou sobreaquecer instantaneamente. Nalguns casos, podem surgir riscos de inc\u00eandio devido a arcos voltaicos ou fios sobreaquecidos. Al\u00e9m disso, pequenas sobretens\u00f5es recorrentes, mesmo que n\u00e3o sejam notadas, enfraquecem gradualmente os circuitos internos, causando problemas de fiabilidade a longo prazo. Nos sistemas fotovoltaicos, as sobretens\u00f5es do lado DC danificam frequentemente os circuitos MPPT ou as caixas de jun\u00e7\u00e3o. Os centros de dados, por outro lado, arriscam a perda de dados cr\u00edticos e o tempo de inatividade do sistema. Assim, mesmo as sobretens\u00f5es moment\u00e2neas podem resultar numa perda de produtividade de horas ou dias e em elevados custos de repara\u00e7\u00e3o.<\/p>\n<hr data-start=\"3125\" data-end=\"3128\" \/>\n<h2 data-start=\"3130\" data-end=\"3161\"><span class=\"ez-toc-section\" id=\"how-to-avoid-an-electric-surge\"><\/span>Como evitar um pico de tens\u00e3o el\u00e9ctrica?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"3163\" data-end=\"3902\">A preven\u00e7\u00e3o de danos causados por sobretens\u00f5es el\u00e9ctricas requer uma estrat\u00e9gia de prote\u00e7\u00e3o em camadas. Primeiro, instale <strong data-start=\"3251\" data-end=\"3266\">DOCUP de tipo 1<\/strong> na entrada de servi\u00e7o principal para lidar com picos de tens\u00e3o induzidos por raios. Em seguida, coloque <strong data-start=\"3344\" data-end=\"3359\">DUP de tipo 2<\/strong> nos pain\u00e9is de distribui\u00e7\u00e3o para bloquear as sobretens\u00f5es residuais da comuta\u00e7\u00e3o interna. Para dispositivos terminais, <strong data-start=\"3455\" data-end=\"3470\">DUP de tipo 3<\/strong> oferecem prote\u00e7\u00e3o de precis\u00e3o. Certifique-se de que o seu sistema de liga\u00e7\u00e3o \u00e0 terra mant\u00e9m uma resist\u00eancia inferior a 10 ohms para facilitar o redireccionamento seguro da tens\u00e3o. Mantenha os comprimentos dos condutores curtos (\u22640,5 m) para reduzir a imped\u00e2ncia. Al\u00e9m disso, mantenha a integridade do isolamento e evite circuitos sobrecarregados. Em regi\u00f5es de alto risco, como o Sudeste Asi\u00e1tico e a \u00c1frica Subsaariana, a inspe\u00e7\u00e3o regular dos indicadores de status do SPD ou o monitoramento remoto \u00e9 essencial para a seguran\u00e7a operacional.<\/p>\n<hr data-start=\"3904\" data-end=\"3907\" \/>\n<h2 data-start=\"3909\" data-end=\"3930\"><span class=\"ez-toc-section\" id=\"conclusion\"><\/span>Conclus\u00e3o<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"3931\" data-end=\"4049\">Um risco de sobretens\u00e3o el\u00e9ctrica \u00e9 control\u00e1vel - escolha SPDs certificados, siga as melhores pr\u00e1ticas e proteja os seus activos de forma proactiva.<\/p>\n<hr data-start=\"4051\" data-end=\"4054\" \/>\n<h2 data-start=\"4056\" data-end=\"4070\"><span class=\"ez-toc-section\" id=\"why-leeyee\"><\/span>Porqu\u00ea LEEYEE?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"4072\" data-end=\"4697\"><strong data-start=\"4072\" data-end=\"4082\">LEEYEE<\/strong> \u00e9 um fabricante profissional na ind\u00fastria de prote\u00e7\u00e3o contra sobretens\u00f5es, oferecendo solu\u00e7\u00f5es avan\u00e7adas adaptadas para <strong data-start=\"4189\" data-end=\"4252\">distribui\u00e7\u00e3o de energia, sistemas solares e equipamento de automatiza\u00e7\u00e3o<\/strong>. Especializado em <strong data-start=\"4270\" data-end=\"4305\">Dispositivos de prote\u00e7\u00e3o contra sobretens\u00f5es (DPS)<\/strong>, A LEEYEE fornece produtos com <strong data-start=\"4337\" data-end=\"4370\">Capacidade de descarga 20kA-100kA<\/strong>, <strong data-start=\"4372\" data-end=\"4395\">Tempo de resposta &lt;25ns<\/strong>e <strong data-start=\"4401\" data-end=\"4425\">TUV, CB, CE e ISO9001<\/strong> certifica\u00e7\u00f5es. Estes par\u00e2metros est\u00e3o entre os melhores da China. Com mais de <strong data-start=\"4499\" data-end=\"4527\">8.000m\u00b2 de espa\u00e7o fabril<\/strong>, Com a sua experi\u00eancia em log\u00edstica global e suporte OEM\/ODM, a LEEYEE garante uma entrega r\u00e1pida, uma qualidade est\u00e1vel e uma fiabilidade t\u00e9cnica em que os profissionais do sector el\u00e9trico de todo o mundo confiam.<\/p>\n<hr data-start=\"4699\" data-end=\"4702\" \/>\n<h2 data-start=\"4704\" data-end=\"4727\"><span class=\"ez-toc-section\" id=\"faqs-surge-electric\"><\/span>FAQs: Sobretens\u00e3o el\u00e9ctrica<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"4729\" data-end=\"4882\"><strong data-start=\"4729\" data-end=\"4768\">Q1: O que \u00e9 um evento de sobretens\u00e3o el\u00e9ctrica?<\/strong><br data-start=\"4768\" data-end=\"4771\" \/>Um evento de sobretens\u00e3o el\u00e9ctrica \u00e9 um pico s\u00fabito de tens\u00e3o que excede a gama normal do sistema e pode danificar o equipamento.<\/p>\n<p data-start=\"4884\" data-end=\"5007\"><strong data-start=\"4884\" data-end=\"4925\">Q2: Como \u00e9 que ocorre uma sobretens\u00e3o el\u00e9ctrica?<\/strong><br data-start=\"4925\" data-end=\"4928\" \/>\u00c9 causada por eventos como descargas atmosf\u00e9ricas, comuta\u00e7\u00e3o da rede el\u00e9ctrica ou falhas na cablagem.<\/p>\n<p data-start=\"5009\" data-end=\"5163\"><strong data-start=\"5009\" data-end=\"5042\">P3: Todas as sobretens\u00f5es s\u00e3o perigosas?<\/strong><br data-start=\"5042\" data-end=\"5045\" \/>Sim. Mesmo os picos pequenos e frequentes degradam o desempenho do sistema ao longo do tempo, enquanto os picos grandes podem causar uma falha imediata.<\/p>\n<p data-start=\"5165\" data-end=\"5298\"><strong data-start=\"5165\" data-end=\"5201\">Q4: Como \u00e9 que os SPD protegem os sistemas?<\/strong><br data-start=\"5201\" data-end=\"5204\" \/>Redireccionam o excesso de tens\u00e3o para a terra, fixando a sobretens\u00e3o a um n\u00edvel seguro em nanossegundos.<\/p>\n<p data-start=\"5300\" data-end=\"5434\"><strong data-start=\"5300\" data-end=\"5342\">Q5: Posso utilizar um SPD para todos os dispositivos?<\/strong><br data-start=\"5342\" data-end=\"5345\" \/>N\u00e3o recomendado. Utilizar DUPs coordenados - Tipos 1, 2 e 3 - com base na localiza\u00e7\u00e3o e na sensibilidade.<\/p>\n<p data-start=\"5436\" data-end=\"5590\"><strong data-start=\"5436\" data-end=\"5477\">Q6: Preciso de DPS para sistemas solares?<\/strong><br data-start=\"5477\" data-end=\"5480\" \/>Sem d\u00favida. Os sistemas fotovoltaicos s\u00e3o altamente vulner\u00e1veis a sobretens\u00f5es de corrente cont\u00ednua e a prote\u00e7\u00e3o \u00e9 fundamental tanto no lado da corrente cont\u00ednua como no lado da corrente alternada.<\/p>\n<hr data-start=\"5592\" data-end=\"5595\" \/>\n<p data-start=\"5597\" data-end=\"5751\" data-is-last-node=\"\" data-is-only-node=\"\"><strong data-start=\"5597\" data-end=\"5612\">Exonera\u00e7\u00e3o de responsabilidade:<\/strong><br data-start=\"5612\" data-end=\"5615\" \/>Este artigo \u00e9 para informa\u00e7\u00e3o geral. Consulte um engenheiro el\u00e9trico licenciado para a conce\u00e7\u00e3o de um sistema de prote\u00e7\u00e3o contra sobretens\u00f5es espec\u00edfico para o local.<\/p>","protected":false},"excerpt":{"rendered":"<p>Os picos de energia danificam silenciosamente os sistemas, interrompem a produ\u00e7\u00e3o e reduzem a vida \u00fatil do equipamento. A LEEYEE fornece solu\u00e7\u00f5es de prote\u00e7\u00e3o de n\u00edvel industrial com par\u00e2metros SPD superiores para evitar falhas el\u00e9ctricas catastr\u00f3ficas. Um evento el\u00e9trico de pico \u00e9 um pico s\u00fabito e tempor\u00e1rio de tens\u00e3o que pode danificar ou destruir sistemas el\u00e9ctricos. Muitas vezes tem origem num raio ou em opera\u00e7\u00f5es de comuta\u00e7\u00e3o. Os Dispositivos de Prote\u00e7\u00e3o contra Surtos (DPS)...<\/p>","protected":false},"author":18,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1,422,491],"tags":[],"class_list":["post-27773","post","type-post","status-publish","format-standard","hentry","category-news","category-industry-news","category-voltage-protection"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How Dangerous Is a Surge Electric Event<\/title>\n<meta name=\"description\" content=\"Discover Surge Electric and further information about electrical protection. Find professional customized low-voltage SPD solutions at LEEYEE Electrics.\" \/>\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.cnspd.com\/pt\/quel-est-le-danger-dune-surtension-electrique-et-que-pouvez-vous-faire\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How Dangerous Is a Surge Electric Event\" \/>\n<meta property=\"og:description\" content=\"Discover Surge Electric and further information about electrical protection. 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