{"id":4266,"date":"2024-02-27T14:10:18","date_gmt":"2024-02-27T20:10:18","guid":{"rendered":"https:\/\/www.dreiym.com\/?p=4266"},"modified":"2025-01-17T18:02:42","modified_gmt":"2025-01-18T00:02:42","slug":"nec-2023-240-87-reduccion-de-la-energia-del-arco","status":"publish","type":"post","link":"https:\/\/vm6fr4whzn6.c.updraftclone.com\/es\/2024\/02\/27\/nec-2023-240-87-reduccion-de-la-energia-del-arco\/","title":{"rendered":"NEC 240.87: Reducci\u00f3n de la energ\u00eda del arco"},"content":{"rendered":"<p>Gu\u00eda para profesionales de la electricidad para la edici\u00f3n 2023 del NEC.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u00bfQu\u00e9 es NEC 240.87?<\/h2>\n\n\n\n<p>NEC 240.87 es una secci\u00f3n del c\u00f3digo en la <a href=\"https:\/\/en.wikipedia.org\/wiki\/National_Electrical_Code\" title=\"\">C\u00f3digo el\u00e9ctrico nacional (NEC)<\/a>) que exige m\u00e9todos de reducci\u00f3n de la energ\u00eda del arco para los disyuntores de 1200 amperios o m\u00e1s. La energ\u00eda del arco es la cantidad de calor y luz producida por un <a href='https:\/\/vm6fr4whzn6.c.updraftclone.com\/es\/2024\/06\/11\/como-se-relacionan-los-relampagos-de-arco-con-el-analisis-en-profundidad-de-fallos-electricos-y-las-inspecciones\/'>arco el\u00e9ctrico<\/a> fallo de arco, que puede causar graves da\u00f1os al equipo y al personal. Los m\u00e9todos de reducci\u00f3n de la energ\u00eda del arco est\u00e1n dise\u00f1ados para reducir la duraci\u00f3n y la intensidad de un fallo de arco, minimizando as\u00ed los peligros potenciales.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u00bfPor qu\u00e9 es importante la norma NEC 240.87?<\/h2>\n\n\n\n<p>NEC 240.87 es importante porque aborda un grave problema de seguridad en <a href='https:\/\/vm6fr4whzn6.c.updraftclone.com\/es\/2022\/07\/29\/3-razones-habituales-por-las-que-fallan-los-sistemas-electricos\/'>sistemas el\u00e9ctricos<\/a>. Los fallos de arco pueden producirse por varias razones, como el fallo del aislamiento, <a href='https:\/\/vm6fr4whzn6.c.updraftclone.com\/es\/2024\/02\/28\/como-evitar-conexiones-electricas-sueltas-y-prevenir-riesgos-de-incendio\/'>conexiones sueltas,<\/a> objetos extra\u00f1os o un error humano. Cuando se produce un fallo de arco, puede generar temperaturas de hasta 35.000 grados Fahrenheit, que pueden fundir metal, inflamar materiales combustibles y causar quemaduras y lesiones graves. Los fallos de arco tambi\u00e9n pueden crear ondas de presi\u00f3n que pueden romper t\u00edmpanos, da\u00f1ar pulmones y destrozar ventanas. Seg\u00fan la Asociaci\u00f3n Nacional de Protecci\u00f3n contra Incendios (NFPA), los fallos de arco son responsables de m\u00e1s de 2.000 lesiones y 400 muertes al a\u00f1o en Estados Unidos.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u00bfCu\u00e1les son los m\u00e9todos de reducci\u00f3n de energ\u00eda de arco requeridos por NEC 240.87?<\/h2>\n\n\n\n<p>La norma NEC 240.87 exige uno de los siguientes m\u00e9todos de reducci\u00f3n de la energ\u00eda del arco para los disyuntores de 1200 amperios o m\u00e1s:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Enclavamiento selectivo por zonas (ZSI): Este m\u00e9todo utiliza se\u00f1ales de comunicaci\u00f3n entre los disyuntores para coordinar sus tiempos de disparo y aislar la zona en fallo lo antes posible. El ZSI puede reducir la energ\u00eda del arco hasta 50% en comparaci\u00f3n con la coordinaci\u00f3n convencional. ZSI requiere disyuntores compatibles y cableado entre ellos.<\/li>\n\n\n\n<li>Rel\u00e9 diferencial: Este m\u00e9todo utiliza transformadores de corriente para medir la diferencia entre las corrientes entrante y saliente de un disyuntor y disparar el disyuntor si la diferencia supera un valor establecido. El rel\u00e9 diferencial puede reducir la energ\u00eda del arco hasta 80% en comparaci\u00f3n con la coordinaci\u00f3n convencional. El rel\u00e9 diferencial requiere transformadores de corriente y rel\u00e9s adicionales.<\/li>\n\n\n\n<li>Conmutaci\u00f3n de mantenimiento con reducci\u00f3n de energ\u00eda e indicador de estado local: Este m\u00e9todo utiliza un interruptor que puede accionarse manualmente para reducir el umbral de disparo del disyuntor y una luz que indica el estado del interruptor. La conmutaci\u00f3n de mantenimiento con reducci\u00f3n de energ\u00eda puede reducir la energ\u00eda del arco en hasta 70% en comparaci\u00f3n con la coordinaci\u00f3n convencional. La conmutaci\u00f3n de mantenimiento con reducci\u00f3n de energ\u00eda requiere un interruptor y una luz en el disyuntor o cerca de \u00e9l.<\/li>\n\n\n\n<li>Sistema activo de mitigaci\u00f3n del arco el\u00e9ctrico con reducci\u00f3n de energ\u00eda: Este m\u00e9todo utiliza un dispositivo que puede detectar y extinguir un fallo de arco creando una v\u00eda de baja impedancia para la corriente de fallo y aplicando una tensi\u00f3n contraria al arco. Activo de reducci\u00f3n de energ\u00eda <a href='https:\/\/vm6fr4whzn6.c.updraftclone.com\/es\/2020\/09\/08\/formas-de-reducir-los-incidentes-de-arco-electrico\/'>sistema de mitigaci\u00f3n del arco el\u00e9ctrico puede reducir<\/a> la energ\u00eda del arco en hasta 90% en comparaci\u00f3n con la coordinaci\u00f3n convencional. El sistema activo de mitigaci\u00f3n de la energ\u00eda del arco el\u00e9ctrico requiere un dispositivo y una fuente de alimentaci\u00f3n.<\/li>\n\n\n\n<li>Ajuste de disparo instant\u00e1neo: Este m\u00e9todo utiliza un disyuntor que puede dispararse en un ciclo o menos de la corriente de fallo, alcanzando un valor preestablecido. El ajuste de disparo instant\u00e1neo puede reducir la energ\u00eda del arco en hasta 40% en comparaci\u00f3n con la coordinaci\u00f3n convencional. El ajuste de disparo instant\u00e1neo requiere un disyuntor con una funci\u00f3n de disparo instant\u00e1neo ajustable.<\/li>\n\n\n\n<li>Anulaci\u00f3n instant\u00e1nea: Este m\u00e9todo utiliza un disyuntor que puede anular el retardo normal y dispararse inmediatamente cuando la corriente de fallo supera un determinado nivel. La anulaci\u00f3n instant\u00e1nea puede reducir la energ\u00eda del arco hasta 60% en comparaci\u00f3n con la coordinaci\u00f3n convencional. Una anulaci\u00f3n instant\u00e1nea requiere un disyuntor con una funci\u00f3n de anulaci\u00f3n instant\u00e1nea.<\/li>\n\n\n\n<li>Medio equivalente aprobado: Este m\u00e9todo utiliza cualquier otra tecnolog\u00eda que pueda reducir la energ\u00eda del arco a un nivel inferior a la energ\u00eda incidente a la distancia de trabajo. Los medios equivalentes aprobados pueden variar en su rendimiento y requisitos de instalaci\u00f3n. Los medios equivalentes aprobados deben ser aprobados por la autoridad competente. A veces es necesaria la creatividad y la aplicaci\u00f3n de funciones especiales de rel\u00e9 u otras soluciones de ingenier\u00eda pueden lograr los mismos o mejores resultados para la reducci\u00f3n de fallos de arco. Para ello ser\u00e1 necesario realizar c\u00e1lculos de ingenier\u00eda. Consulte a un <a href=\"https:\/\/vm6fr4whzn6.c.updraftclone.com\/es\/servicios\/energia-electrica\/estudios-de-arco-electrico\/\" title=\"\">ingeniero el\u00e9ctrico<\/a> para ayudarle con otras soluciones.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u00bfC\u00f3mo cumplir la norma NEC 240.87?<\/h2>\n\n\n\n<p>Para cumplir con la norma NEC 240.87, los profesionales de la electricidad deben seguir estos pasos:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Identifique los disyuntores de 1200 amperios o m\u00e1s en el sistema el\u00e9ctrico.<\/li>\n\n\n\n<li>Seleccione e instale uno de los m\u00e9todos de reducci\u00f3n de energ\u00eda de arco para cada disyuntor.<\/li>\n\n\n\n<li>Etiquete el disyuntor con el m\u00e9todo de reducci\u00f3n de la energ\u00eda del arco y la ubicaci\u00f3n de la documentaci\u00f3n.<\/li>\n\n\n\n<li>Documente el m\u00e9todo de reducci\u00f3n de la energ\u00eda del arco y los ajustes del disyuntor.<\/li>\n\n\n\n<li>Pruebe y verifique la funcionalidad del m\u00e9todo de reducci\u00f3n de la energ\u00eda del arco.<\/li>\n\n\n\n<li>Actualice el an\u00e1lisis de riesgos de rel\u00e1mpago de arco y las etiquetas de rel\u00e1mpago de arco del sistema el\u00e9ctrico.<\/li>\n<\/ul>\n\n\n\n<p>NEC 240.87 es una secci\u00f3n del c\u00f3digo que exige m\u00e9todos de reducci\u00f3n de la energ\u00eda del arco para disyuntores de 1200 amperios o m\u00e1s. Su objetivo es mejorar la seguridad de <a href='https:\/\/vm6fr4whzn6.c.updraftclone.com\/es\/2024\/06\/11\/como-se-relacionan-los-relampagos-de-arco-con-el-analisis-en-profundidad-de-fallos-electricos-y-las-inspecciones\/'>sistemas el\u00e9ctricos y reducir los riesgos de arco<\/a> fallos. Los profesionales de la electricidad deben estar familiarizados con los m\u00e9todos de reducci\u00f3n de la energ\u00eda del arco y con los pasos para cumplir la norma NEC 240.87.<\/p>","protected":false},"excerpt":{"rendered":"<p>A Guide for Electrical Professionals for the 2023 NEC edition. What is NEC 240.87? NEC 240.87 is a code section in the National Electrical Code (NEC) that requires arc energy reduction methods for circuit breakers rated at 1200 amps or higher. Arc energy is the amount of heat and light produced by an electrical arc [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":4267,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_mbp_gutenberg_autopost":false,"_pgmb_is_evergreen":true,"_pgmb_ap_template_id":0,"iawp_total_views":218,"footnotes":""},"categories":[4],"tags":[],"class_list":["post-4266","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-electrical"],"acf":[],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO Pro 4.9.6.2 - aioseo.com -->\n\t<meta name=\"description\" content=\"A Guide for Electrical Professionals for the 2023 NEC edition. What is NEC 240.87? 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