{"id":1332,"date":"2026-07-22T05:33:12","date_gmt":"2026-07-22T05:33:12","guid":{"rendered":"https:\/\/lstransformer.com\/what-are-the-fault-classifications-of-transformers\/"},"modified":"2026-09-28T02:54:07","modified_gmt":"2026-09-28T02:54:07","slug":"what-are-the-fault-classifications-of-transformers","status":"publish","type":"post","link":"https:\/\/www.lstransformer.com\/es\/what-are-the-fault-classifications-of-transformers\/","title":{"rendered":"What are the fault classifications of transformers?"},"content":{"rendered":"<h1 style=\"text-align: left;\">What are the fault classifications of transformers?<\/h1>\n<p style=\"font-weight: 400;\">Faults in oil-immersed power transformers are generally divided into two main categories: internal faults and external faults. Internal faults primarily occur within the transformer&#8217;s oil tank, including phase-to-phase short circuits between winding groups, turn-to-turn short circuits between winding turns, and grounding faults caused by winding or lead wires touching the outer casing. External faults mainly occur on the external insulation bushings and lead wires of the transformer&#8217;s oil tank, involving flashovers or fractures of insulation bushings leading to grounding short circuits through the outer casing and phase-to-phase faults between lead wires, which may lead to internal faults or deformation of windings.<\/p>\n<p style=\"font-weight: 400;\">Internal faults of transformers can be broadly categorized into two types based on their nature: thermal faults and electrical faults. Thermal faults typically involve localized overheating and temperature rise within the transformer. Depending on the severity, thermal faults can be classified as mild overheating (generally below 150\u00b0C), low-temperature overheating (150\u2013300\u00b0C), moderate-temperature overheating (300\u2013700\u00b0C), and high-temperature overheating (generally above 700\u00b0C). Electrical faults usually refer to the degradation or deterioration of insulation performance within the transformer under the influence of high electric field intensity. Based on different energy density levels of discharges, electrical faults can be further classified into partial discharge, spark discharge, and high-energy arc discharge.<\/p>\n<p style=\"font-weight: 400;\">Due to the broad scope of transformer faults, they can be classified from different perspectives. Circuit-wise, faults may include circuit faults, magnetic circuit faults, and oil circuit faults. Structurally, faults may involve winding faults, core faults, oil-related faults, and accessory faults. Additionally, considering common fault-prone areas, classifications may include insulation faults, core faults, tap changer faults, and others. Among them, the most severe and frequent is the transformer&#8217;s output short circuit fault. Other types of faults include transformer leakage faults, oil flow electrification faults, protection misoperation faults, etc. These different types of faults may reflect thermal faults, electrical faults, or a combination of both, while transformer leakage faults may not exhibit typical thermal or electrical fault characteristics under normal circumstances.<\/p>\n<h2 style=\"font-weight: bold;\">Contacto<\/h2>\n<p>LuShan, est. En 1975, es un Chino fabricante profesional que se especializa en los transformadores de potencia y reactores de m\u00e1s de 50 a\u00f1os. Los productos principales son <a href=\"https:\/\/www.lstransformer.com\/es\/\">transformador monof\u00e1sico, trif\u00e1sico de transformadores de aislamiento, transformador el\u00e9ctrico, transformador de distribuci\u00f3n, el paso hacia abajo y paso transformador de baja tensi\u00f3n del transformador, transformador de alto voltaje, transformador de control, transformador toroidal, R-transformador con n\u00facleo; DC inductores, CA reactores, filtrado de reactor de l\u00ednea y de carga del reactor, estrangulaciones, el filtrado de los reactores y de los intermedios, de alta frecuencia de los productos<\/a>.<\/p>\n<p>Nuestros transformadores de potencia y reactores son ampliamente utilizados en las 10 \u00e1reas de aplicaci\u00f3n: rapid transit, maquinaria de construcci\u00f3n, energ\u00eda renovable, de fabricaci\u00f3n inteligentes, equipos m\u00e9dicos, la mina de carb\u00f3n de la explosi\u00f3n de la prevenci\u00f3n, el sistema de excitaci\u00f3n, de vac\u00edo, de sinterizaci\u00f3n(horno), aire acondicionado central.<\/p>\n<p>Saber m\u00e1s acerca de transformadores de potencia y reactores: <a href=\"https:\/\/www.lstransformer.com\/es\/\">www.lstransformer.com<\/a>.<\/p>\n<p>Si desea obtener soluciones personalizadas para transformadores o reactores, p\u00f3ngase en contacto con nosotros.<br \/>\nWhatsApp\uff1a+86 13787095096<br \/>\nCorreo electr\u00f3nico: marketing@hnlsdz.com<\/p>","protected":false},"excerpt":{"rendered":"<p>What are the fault classifications of transformers? Faults in oil-immersed power transformers are generally divided into two main categories: internal faults and external faults. Internal faults primarily occur within the transformer&#8217;s oil tank, including phase-to-phase short circuits between winding groups, turn-to-turn short circuits between winding turns, and grounding faults caused by winding or lead wires [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":2706,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[48],"tags":[],"class_list":["post-1332","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-faq"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What are the fault classifications of transformers? - LS power transformer, Line reactor, High-voltage transformer, Oil-immersed transformer-CHANGSHA LUSHAN ELECTRONIC TECHNOLOGY CO.,LTD<\/title>\n<meta name=\"description\" content=\"Faults in oil-immersed power transformers are generally divided into two main categories: internal faults and external faults. Internal faults primarily occur within the transformer&#039;s oil tank, including phase-to-phase short circuits between winding groups, turn-to-turn short circuits between winding turns, and grounding faults caused by winding or lead wires touching the outer casing. External faults mainly occur on the external insulation bushings and lead wires of the transformer&#039;s oil tank, involving flashovers or fractures of insulation bushings leading to grounding short circuits through the outer casing and phase-to-phase faults between lead wires, which may lead to internal faults or deformation of windings.\" \/>\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.lstransformer.com\/es\/what-are-the-fault-classifications-of-transformers\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What are the fault classifications of transformers? - LS power transformer, Line reactor, High-voltage transformer, Oil-immersed transformer-CHANGSHA LUSHAN ELECTRONIC TECHNOLOGY CO.,LTD\" \/>\n<meta property=\"og:description\" content=\"Faults in oil-immersed power transformers are generally divided into two main categories: internal faults and external faults. Internal faults primarily occur within the transformer&#039;s oil tank, including phase-to-phase short circuits between winding groups, turn-to-turn short circuits between winding turns, and grounding faults caused by winding or lead wires touching the outer casing. External faults mainly occur on the external insulation bushings and lead wires of the transformer&#039;s oil tank, involving flashovers or fractures of insulation bushings leading to grounding short circuits through the outer casing and phase-to-phase faults between lead wires, which may lead to internal faults or deformation of windings.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.lstransformer.com\/es\/what-are-the-fault-classifications-of-transformers\/\" \/>\n<meta property=\"og:site_name\" content=\"LS power transformer, Line reactor, High-voltage transformer, Oil-immersed transformer-CHANGSHA LUSHAN ELECTRONIC TECHNOLOGY CO.,LTD\" \/>\n<meta property=\"article:published_time\" content=\"2026-07-22T05:33:12+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-09-28T02:54:07+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.lstransformer.com\/wp-content\/uploads\/2026\/07\/1742021341706127.png\" \/>\n\t<meta property=\"og:image:width\" content=\"370\" \/>\n\t<meta property=\"og:image:height\" content=\"276\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"369703005\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Escrito por\" \/>\n\t<meta name=\"twitter:data1\" content=\"369703005\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tiempo de lectura\" \/>\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.lstransformer.com\\\/what-are-the-fault-classifications-of-transformers\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.lstransformer.com\\\/what-are-the-fault-classifications-of-transformers\\\/\"},\"author\":{\"name\":\"369703005\",\"@id\":\"https:\\\/\\\/www.lstransformer.com\\\/#\\\/schema\\\/person\\\/674089c15f4857c19a997f886816d289\"},\"headline\":\"What are the fault classifications of transformers?\",\"datePublished\":\"2026-07-22T05:33:12+00:00\",\"dateModified\":\"2026-09-28T02:54:07+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.lstransformer.com\\\/what-are-the-fault-classifications-of-transformers\\\/\"},\"wordCount\":469,\"publisher\":{\"@id\":\"https:\\\/\\\/www.lstransformer.com\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.lstransformer.com\\\/what-are-the-fault-classifications-of-transformers\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.lstransformer.com\\\/wp-content\\\/uploads\\\/2026\\\/07\\\/1742021341706127.png\",\"articleSection\":[\"FAQ\"],\"inLanguage\":\"es\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.lstransformer.com\\\/what-are-the-fault-classifications-of-transformers\\\/\",\"url\":\"https:\\\/\\\/www.lstransformer.com\\\/what-are-the-fault-classifications-of-transformers\\\/\",\"name\":\"What are the fault classifications of transformers? - LS power transformer, Line reactor, High-voltage transformer, Oil-immersed transformer-CHANGSHA LUSHAN ELECTRONIC TECHNOLOGY CO.,LTD\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.lstransformer.com\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.lstransformer.com\\\/what-are-the-fault-classifications-of-transformers\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.lstransformer.com\\\/what-are-the-fault-classifications-of-transformers\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.lstransformer.com\\\/wp-content\\\/uploads\\\/2026\\\/07\\\/1742021341706127.png\",\"datePublished\":\"2026-07-22T05:33:12+00:00\",\"dateModified\":\"2026-09-28T02:54:07+00:00\",\"description\":\"Faults in oil-immersed power transformers are generally divided into two main categories: internal faults and external faults. 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External faults mainly occur on the external insulation bushings and lead wires of the transformer's oil tank, involving flashovers or fractures of insulation bushings leading to grounding short circuits through the outer casing and phase-to-phase faults between lead wires, which may lead to internal faults or deformation of windings.","og_url":"https:\/\/www.lstransformer.com\/es\/what-are-the-fault-classifications-of-transformers\/","og_site_name":"LS power transformer, Line reactor, High-voltage transformer, Oil-immersed transformer-CHANGSHA LUSHAN ELECTRONIC TECHNOLOGY CO.,LTD","article_published_time":"2026-07-22T05:33:12+00:00","article_modified_time":"2026-09-28T02:54:07+00:00","og_image":[{"width":370,"height":276,"url":"https:\/\/www.lstransformer.com\/wp-content\/uploads\/2026\/07\/1742021341706127.png","type":"image\/png"}],"author":"369703005","twitter_card":"summary_large_image","twitter_misc":{"Escrito por":"369703005","Tiempo de lectura":"3 minutos"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.lstransformer.com\/what-are-the-fault-classifications-of-transformers\/#article","isPartOf":{"@id":"https:\/\/www.lstransformer.com\/what-are-the-fault-classifications-of-transformers\/"},"author":{"name":"369703005","@id":"https:\/\/www.lstransformer.com\/#\/schema\/person\/674089c15f4857c19a997f886816d289"},"headline":"What are the fault classifications of transformers?","datePublished":"2026-07-22T05:33:12+00:00","dateModified":"2026-09-28T02:54:07+00:00","mainEntityOfPage":{"@id":"https:\/\/www.lstransformer.com\/what-are-the-fault-classifications-of-transformers\/"},"wordCount":469,"publisher":{"@id":"https:\/\/www.lstransformer.com\/#organization"},"image":{"@id":"https:\/\/www.lstransformer.com\/what-are-the-fault-classifications-of-transformers\/#primaryimage"},"thumbnailUrl":"https:\/\/www.lstransformer.com\/wp-content\/uploads\/2026\/07\/1742021341706127.png","articleSection":["FAQ"],"inLanguage":"es"},{"@type":"WebPage","@id":"https:\/\/www.lstransformer.com\/what-are-the-fault-classifications-of-transformers\/","url":"https:\/\/www.lstransformer.com\/what-are-the-fault-classifications-of-transformers\/","name":"What are the fault classifications of transformers? - LS power transformer, Line reactor, High-voltage transformer, Oil-immersed transformer-CHANGSHA LUSHAN ELECTRONIC TECHNOLOGY CO.,LTD","isPartOf":{"@id":"https:\/\/www.lstransformer.com\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.lstransformer.com\/what-are-the-fault-classifications-of-transformers\/#primaryimage"},"image":{"@id":"https:\/\/www.lstransformer.com\/what-are-the-fault-classifications-of-transformers\/#primaryimage"},"thumbnailUrl":"https:\/\/www.lstransformer.com\/wp-content\/uploads\/2026\/07\/1742021341706127.png","datePublished":"2026-07-22T05:33:12+00:00","dateModified":"2026-09-28T02:54:07+00:00","description":"Faults in oil-immersed power transformers are generally divided into two main categories: internal faults and external faults. Internal faults primarily occur within the transformer's oil tank, including phase-to-phase short circuits between winding groups, turn-to-turn short circuits between winding turns, and grounding faults caused by winding or lead wires touching the outer casing. External faults mainly occur on the external insulation bushings and lead wires of the transformer's oil tank, involving flashovers or fractures of insulation bushings leading to grounding short circuits through the outer casing and phase-to-phase faults between lead wires, which may lead to internal faults or deformation of windings.","breadcrumb":{"@id":"https:\/\/www.lstransformer.com\/what-are-the-fault-classifications-of-transformers\/#breadcrumb"},"inLanguage":"es","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.lstransformer.com\/what-are-the-fault-classifications-of-transformers\/"]}]},{"@type":"ImageObject","inLanguage":"es","@id":"https:\/\/www.lstransformer.com\/what-are-the-fault-classifications-of-transformers\/#primaryimage","url":"https:\/\/www.lstransformer.com\/wp-content\/uploads\/2026\/07\/1742021341706127.png","contentUrl":"https:\/\/www.lstransformer.com\/wp-content\/uploads\/2026\/07\/1742021341706127.png","width":370,"height":276},{"@type":"BreadcrumbList","@id":"https:\/\/www.lstransformer.com\/what-are-the-fault-classifications-of-transformers\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\u9996\u9875","item":"https:\/\/www.lstransformer.com\/"},{"@type":"ListItem","position":2,"name":"What are the fault classifications of transformers?"}]},{"@type":"WebSite","@id":"https:\/\/www.lstransformer.com\/#website","url":"https:\/\/www.lstransformer.com\/","name":"LS transformador de potencia, reactor de L\u00ednea de Alta tensi\u00f3n del transformador, el Aceite de transformador inmerso-CHANGSHA LUSHAN TECNOLOG\u00cdA ELECTR\u00d3NICA CO.,LTD","description":"","publisher":{"@id":"https:\/\/www.lstransformer.com\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.lstransformer.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"es"},{"@type":"Organization","@id":"https:\/\/www.lstransformer.com\/#organization","name":"LS transformador de potencia, reactor de L\u00ednea de Alta tensi\u00f3n del transformador, el Aceite de transformador inmerso-CHANGSHA LUSHAN TECNOLOG\u00cdA ELECTR\u00d3NICA CO.,LTD","url":"https:\/\/www.lstransformer.com\/","logo":{"@type":"ImageObject","inLanguage":"es","@id":"https:\/\/www.lstransformer.com\/#\/schema\/logo\/image\/","url":"https:\/\/www.lstransformer.com\/wp-content\/uploads\/2026\/06\/cropped-7e09bd7bad9c830e0d75b8487b0d77c3-1.webp","contentUrl":"https:\/\/www.lstransformer.com\/wp-content\/uploads\/2026\/06\/cropped-7e09bd7bad9c830e0d75b8487b0d77c3-1.webp","width":760,"height":202,"caption":"LS power transformer, Line reactor, High-voltage transformer, Oil-immersed transformer-CHANGSHA LUSHAN ELECTRONIC TECHNOLOGY CO.,LTD"},"image":{"@id":"https:\/\/www.lstransformer.com\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/www.lstransformer.com\/#\/schema\/person\/674089c15f4857c19a997f886816d289","name":"369703005","image":{"@type":"ImageObject","inLanguage":"es","@id":"https:\/\/secure.gravatar.com\/avatar\/dcaa0e47cd7b6c99ffdd80f5772032ed2d2591b5b8e7b905e5fd87a850954248?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/dcaa0e47cd7b6c99ffdd80f5772032ed2d2591b5b8e7b905e5fd87a850954248?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/dcaa0e47cd7b6c99ffdd80f5772032ed2d2591b5b8e7b905e5fd87a850954248?s=96&d=mm&r=g","caption":"369703005"},"url":"https:\/\/www.lstransformer.com\/es\/author\/369703005\/"}]}},"_links":{"self":[{"href":"https:\/\/www.lstransformer.com\/es\/wp-json\/wp\/v2\/posts\/1332","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.lstransformer.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.lstransformer.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.lstransformer.com\/es\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lstransformer.com\/es\/wp-json\/wp\/v2\/comments?post=1332"}],"version-history":[{"count":4,"href":"https:\/\/www.lstransformer.com\/es\/wp-json\/wp\/v2\/posts\/1332\/revisions"}],"predecessor-version":[{"id":6766,"href":"https:\/\/www.lstransformer.com\/es\/wp-json\/wp\/v2\/posts\/1332\/revisions\/6766"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.lstransformer.com\/es\/wp-json\/wp\/v2\/media\/2706"}],"wp:attachment":[{"href":"https:\/\/www.lstransformer.com\/es\/wp-json\/wp\/v2\/media?parent=1332"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lstransformer.com\/es\/wp-json\/wp\/v2\/categories?post=1332"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lstransformer.com\/es\/wp-json\/wp\/v2\/tags?post=1332"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}