{"id":6138,"date":"2018-06-18T09:21:20","date_gmt":"2018-06-18T16:21:20","guid":{"rendered":"https:\/\/brainfiller.com\/?p=6138"},"modified":"2025-11-19T09:46:35","modified_gmt":"2025-11-19T16:46:35","slug":"zero-sequence-impedance-and-incident-energy","status":"publish","type":"post","link":"https:\/\/brainfiller.com\/es\/brainfiller-library\/arc-flash-electrical-safety\/zero-sequence-impedance-and-incident-energy\/","title":{"rendered":"Impedancia de secuencia cero y energ\u00eda incidente"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"6138\" class=\"elementor elementor-6138\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-b4cada7 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"b4cada7\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-1b38d82\" data-id=\"1b38d82\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-0af1652 elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"0af1652\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-1d98d2ad elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"1d98d2ad\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-26476984\" data-id=\"26476984\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-4f6b1d6a elementor-widget elementor-widget-text-editor\" data-id=\"4f6b1d6a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><a href=\"https:\/\/brainfiller.com\/wp-content\/uploads\/2018\/06\/MCC-arc-flash-incident-energy.jpg\"><img fetchpriority=\"high\" decoding=\"async\" class=\"alignleft wp-image-6238\" src=\"https:\/\/brainfiller.com\/wp-content\/uploads\/2018\/06\/MCC-arc-flash-incident-energy-300x257.jpg\" alt=\"Zero-Sequence Impedance and Incident Energy\" width=\"380\" height=\"326\" srcset=\"https:\/\/brainfiller.com\/wp-content\/uploads\/2018\/06\/MCC-arc-flash-incident-energy-300x257.jpg 300w, https:\/\/brainfiller.com\/wp-content\/uploads\/2018\/06\/MCC-arc-flash-incident-energy.jpg 587w\" sizes=\"(max-width: 380px) 100vw, 380px\" \/><\/a>Una pregunta que me hacen a menudo, ya sea en l\u00ednea o en uno de mis... <a href=\"https:\/\/brainfiller.com\/es\/courses\/how-to-perform-an-arc-flash-hazard-calculation-study-2-days\/\">Clases de capacitaci\u00f3n sobre arco el\u00e9ctrico<\/a> Se refiere a los c\u00e1lculos de energ\u00eda incidente y corriente de cortocircuito l\u00ednea-tierra:<\/p><p>\u201cDado que es posible que la corriente de cortocircuito de l\u00ednea a tierra sea mayor que la corriente trif\u00e1sica, \u00bfpodr\u00eda la condici\u00f3n de l\u00ednea a tierra ser el peor caso para los c\u00e1lculos de energ\u00eda incidente utilizando las ecuaciones IEEE 1584?\u201d<\/p><p><strong>La respuesta corta:<\/strong> No.<\/p><p><strong>La respuesta m\u00e1s larga:<\/strong> Veamos las ecuaciones para cada c\u00e1lculo de cortocircuito utilizando componentes sim\u00e9tricos.<\/p><p>La ecuaci\u00f3n para calcular la corriente de falla trif\u00e1sica es:<\/p><p>I<sub>(3 fases)<\/sub> = V\/Z<sub>1<\/sub><\/p><p>La ecuaci\u00f3n para calcular la corriente de falla de l\u00ednea a tierra es:<\/p><p>I<sub>(l\u00ednea-tierra)<\/sub> 3V \/ (Z<sub>1<\/sub>+Z<sub>2<\/sub>+Z<sub>0<\/sub>)<\/p><p>D\u00f3nde:<\/p><p>V = voltaje<br \/>O<sub>1<\/sub> = Impedancia de secuencia positiva<br \/>O<sub>2<\/sub> = Impedancia de secuencia negativa (Z<sub>2<\/sub> normalmente es igual a Z<sub>1<\/sub>)<br \/>O<sub>0<\/sub> = Impedancia de secuencia cero<br \/>I<sub>(3 fases)<\/sub> = Corriente de cortocircuito trif\u00e1sica<br \/>I<sub>(l\u00ednea-tierra)<\/sub> = Corriente de cortocircuito de l\u00ednea a tierra<br \/><br \/>Todos los valores est\u00e1n en \u201cpor unidad\u201d<\/p><p>Para un marco de referencia, si Z<sub>1 <\/sub>y Z<sub>2<\/sub> son iguales <strong><em>y<\/em><\/strong>\u00a0 O<sub>0<\/sub> Tambi\u00e9n es igual (lo cual no es demasiado com\u00fan)<\/p><p>Entonces Z<sub>1 <\/sub>=Z<sub>2<\/sub> =Z<sub>0<\/sub><\/p><p>Para esta condici\u00f3n la corriente de cortocircuito de l\u00ednea a tierra calculada ser\u00eda:<\/p><p>I<sub>(l\u00ednea-tierra)<\/sub> = 3 V \/ (Z<sub>1<\/sub>+Z<sub>2<\/sub>+Z<sub>0<\/sub>) = 3V \/ 3Z = V \/ Z<sub>1<br \/><\/sub><br \/>En otras palabras, la corriente de cortocircuito de l\u00ednea a tierra ser\u00eda de la misma magnitud que el caso trif\u00e1sico para esta condici\u00f3n espec\u00edfica.<\/p><p>Sin embargo, para sistemas conectados a tierra Z<sub>0<\/sub> normalmente es mayor que Z<sub>1<\/sub> y Z<sub>2<\/sub>. Con Z<sub>0<\/sub> normalmente siendo mayor que Z<sub>1<\/sub> y Z<sub>2<\/sub>, la corriente de cortocircuito de l\u00ednea a tierra resultante es <em>normalmente<\/em> menor que en el caso trif\u00e1sico. Para el caso de sistemas sin conexi\u00f3n a tierra donde no fluye corriente de falla a tierra, Z<sub>0<\/sub> es infinito<\/p><p>Como se mencion\u00f3, tambi\u00e9n es posible que Z<sub>0<\/sub> ser ligeramente inferior a Z<sub>1<\/sub> y Z<sub>2<\/sub> Esto hace que la corriente de cortocircuito de l\u00ednea a tierra sea ligeramente mayor que la corriente trif\u00e1sica. Un caso en el que esto puede ocurrir es en el lado secundario o cerca de \u00e9l de un transformador delta-estrella. Esto tambi\u00e9n puede ocurrir cerca de algunos generadores. En t\u00e9rminos pr\u00e1cticos, esto significa que la corriente de cortocircuito calculada para una falla de l\u00ednea a tierra ser\u00eda ligeramente mayor que para una falla trif\u00e1sica en este caso.<\/p><p>Volviendo a la pregunta original, si la corriente de cortocircuito de l\u00ednea a tierra es ligeramente superior a la del caso trif\u00e1sico, \u00bfel caso de l\u00ednea a tierra dar\u00eda como resultado la energ\u00eda incidente calculada en el peor de los casos?<\/p><p>En cuanto a la respuesta negativa, los c\u00e1lculos que utilizan las ecuaciones IEEE 1584 se basan en un arco el\u00e9ctrico trif\u00e1sico, es decir, las tres fases contribuyen a la energ\u00eda incidente. Incluso si la corriente de cortocircuito entre la l\u00ednea y la tierra es mayor, la energ\u00eda incidente corresponde solo a una fase. La corriente trif\u00e1sica ligeramente inferior implica energ\u00eda incidente de las tres fases, por lo que ser\u00eda el peor de los casos.<\/p><p>Para obtener m\u00e1s informaci\u00f3n sobre los c\u00e1lculos de corriente de cortocircuito y componentes sim\u00e9tricos, consulte mi <a href=\"https:\/\/brainfiller.com\/es\/videos\/short-circuit-calculations-per-unit-and-symmetrical-components\/\">V\u00eddeo corto.<\/a><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>Zero-Sequence Impedance and Incident Energy: A question that I am often asked either on-line or in one of my arc flash training classes is in regards to incident energy calculations and line-ground short circuit current: \u201cSince it is possible for the line-to-ground short circuit current&#8230;<\/p>","protected":false},"author":2,"featured_media":19313,"comment_status":"open","ping_status":"closed","sticky":false,"template":"elementor_theme","format":"standard","meta":{"_acf_changed":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_price":"","_stock":"","_tribe_ticket_header":"","_tribe_default_ticket_provider":"","_tribe_ticket_capacity":"0","_ticket_start_date":"","_ticket_end_date":"","_tribe_ticket_show_description":"","_tribe_ticket_show_not_going":false,"_tribe_ticket_use_global_stock":"","_tribe_ticket_global_stock_level":"","_global_stock_mode":"","_global_stock_cap":"","_tribe_rsvp_for_event":"","_tribe_ticket_going_count":"","_tribe_ticket_not_going_count":"","_tribe_tickets_list":"[]","_tribe_ticket_has_attendee_info_fields":false,"footnotes":"","_tec_slr_enabled":"","_tec_slr_layout":""},"categories":[9,406,35,403,412,407,408],"tags":[],"class_list":["post-6138","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-arc-flash-electrical-safety","category-arc-flash-safety-and-hazard-analysis","category-electrical-power-systems-brainfiller-library","category-electrical-safety-codes-and-standards","category-electrical-safety-training-and-culture","category-emerging-electrical-safety-technologies-and-trends","category-short-circuit-analysis-and-fault-current-calculations"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Zero-Sequence Impedance and Incident Energy - Arc Flash &amp; 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