{"id":80455,"date":"2024-01-14T13:05:18","date_gmt":"2024-01-14T13:05:18","guid":{"rendered":"https:\/\/www.electricity-magnetism.org\/alta-tensao-baixa-tensao\/"},"modified":"2024-01-20T09:48:08","modified_gmt":"2024-01-20T09:48:08","slug":"alta-tensao-baixa-tensao","status":"publish","type":"post","link":"https:\/\/www.electricity-magnetism.org\/pt-br\/alta-tensao-baixa-tensao\/","title":{"rendered":"Alta Tens\u00e3o &#8211; Baixa Tens\u00e3o"},"content":{"rendered":"<h2>Classifica\u00e7\u00e3o dos N\u00edveis de Tens\u00e3o El\u00e9trica<\/h2>\n<p>No contexto da engenharia el\u00e9trica e do uso di\u00e1rio de equipamentos el\u00e9tricos, \u00e9 essencial compreender a classifica\u00e7\u00e3o dos diferentes n\u00edveis de tens\u00e3o. Nos Estados Unidos, a American National Standards Institute (ANSI) e a International Electrotechnical Commission (IEC) definem padr\u00f5es para estas classifica\u00e7\u00f5es, que s\u00e3o fundamentais tanto para o projeto de sistemas el\u00e9tricos quanto para a seguran\u00e7a no manuseio de equipamentos el\u00e9tricos.<\/p>\n<h2>Classifica\u00e7\u00e3o ANSI C84.1-2020<\/h2>\n<p>De acordo com a norma ANSI C84.1-2020, os n\u00edveis de tens\u00e3o em sistemas el\u00e9tricos de 60 Hz com mais de 100 V s\u00e3o categorizados da seguinte forma:<\/p>\n<ul>\n<li><strong>Baixa tens\u00e3o:<\/strong> de 240 a 600 V<\/li>\n<li><strong>M\u00e9dia tens\u00e3o:<\/strong> de 2.4 a 69 kV<\/li>\n<li><strong>Alta tens\u00e3o:<\/strong> de 115 kV a 230 kV<\/li>\n<li><strong>Extra-alta tens\u00e3o:<\/strong> de 345 kV a 765 kV<\/li>\n<li><strong>Ultra-alta tens\u00e3o:<\/strong> 1.100 kV<\/li>\n<\/ul>\n<h2>Classifica\u00e7\u00e3o IEC para Edifica\u00e7\u00f5es e Aparelhos El\u00e9tricos<\/h2>\n<p>A IEC define os n\u00edveis de tens\u00e3o em edifica\u00e7\u00f5es e para o uso geral de aparelhos el\u00e9tricos da seguinte maneira:<\/p>\n<ul>\n<li><strong>Alta tens\u00e3o:<\/strong> mais de 1.000 volts (V) em corrente alternada (AC) e acima de 1.500 V em corrente cont\u00ednua (DC)<\/li>\n<li><strong>Baixa tens\u00e3o:<\/strong> entre 50 &#8211; 1.000 volts de corrente alternada e entre 120 &#8211; 1.500 V de corrente cont\u00ednua<\/li>\n<li><strong>Extra-baixa tens\u00e3o:<\/strong> abaixo de 50 V de corrente alternada e 120 V de corrente cont\u00ednua<\/li>\n<\/ul>\n<h2>Classifica\u00e7\u00e3o por Eletricistas no Contexto de Trabalho<\/h2>\n<p>Na pr\u00e1tica di\u00e1ria, &#8220;alta tens\u00e3o&#8221; \u00e9 um termo usado para alertar sobre riscos de eletricidade suficiente para causar danos ou morte. Para os trabalhadores el\u00e9tricos, indica um limiar de risco elevado. Equipamentos de alta tens\u00e3o desprotegidos devem ser separados de \u00e1reas de trabalho comuns, sinalizados com avisos de perigo, e protegidos por barreiras ou seguran\u00e7a. Tens\u00f5es acima de aproximadamente 50 volts podem causar quantidades perigosas de corrente ao fluir atrav\u00e9s de um ser humano, por isso os padr\u00f5es de seguran\u00e7a s\u00e3o mais rigorosos nesses circuitos.<\/p>\n<h2>Perguntas Frequentes<\/h2>\n<p><strong>O que \u00e9 alta tens\u00e3o?<\/strong><br \/>Segundo a IEC, alta tens\u00e3o \u00e9 definida como mais de 1.000 volts (V) de corrente alternada (AC) e acima de 1.500 V de corrente cont\u00ednua (DC).<\/p>\n<p><strong>O que \u00e9 baixa tens\u00e3o?<\/strong><br \/>Conforme ANSI C84.1-2020 e IEC, baixa tens\u00e3o refere-se a tens\u00f5es entre 240 a 600 V e entre 50 &#8211; 1.000 volts de corrente alternada, respectivamente, e entre 120 &#8211; 1.500 V de corrente cont\u00ednua.<\/p>\n<p><strong>Quais s\u00e3o as tens\u00f5es t\u00edpicas para dispositivos dom\u00e9sticos?<\/strong><br \/>Os dispositivos dom\u00e9sticos comuns operam com v\u00e1rias tens\u00f5es, como 1.5V (DC) para baterias alcalinas, 3.8V (DC) para baterias de smartphones, 12V (DC) para baterias de autom\u00f3veis, e 110 &#8211; 120V (AC) para tomadas el\u00e9tricas padr\u00e3o nos Estados Unidos.<\/p>\n<h2>Nota Importante<\/h2>\n<p>Este artigo \u00e9 para uso informativo apenas. Sempre consulte um profissional certificado ao projetar e trabalhar com equipamentos el\u00e9tricos. Nunca trabalhe em circuitos energizados ou execute tarefas para as quais n\u00e3o est\u00e1 qualificado.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.electricity-magnetism.org\/wp-content\/uploads\/2022\/01\/logo.png\" alt=\"\" \/><\/p>\n<div style=\"text-align: center; font-size: 20px;\">\n    <a href=\"https:\/\/www.electricity-magnetism.org\/voltage\/high-voltage-low-voltage\/\">Original Article<\/a>\n<\/div>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A alta tens\u00e3o \u00e9 simplesmente uma tens\u00e3o acima de um determinado limite (ou seja, 1000 VCA). Baixa tens\u00e3o \u00e9 uma tens\u00e3o abaixo deste limite.<\/p>\n","protected":false},"author":1,"featured_media":1581,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_generate-full-width-content":"","footnotes":""},"categories":[14],"tags":[],"class_list":["post-80455","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nao-categorizado","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-50"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v17.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Alta Tens\u00e3o - Baixa Tens\u00e3o<\/title>\n<meta name=\"description\" content=\"A alta tens\u00e3o \u00e9 simplesmente uma tens\u00e3o acima de um determinado limite (ou seja, 1000 VCA). 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