{"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\/fr\/what-are-the-fault-classifications-of-transformers\/","title":{"rendered":"What are the fault classifications of transformers?"},"content":{"rendered":"

What are the fault classifications of transformers?<\/h1>\n

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.<\/p>\n

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

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’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

Contact<\/h2>\n

LuShan, heure de l'est. 1975, est un fabricant professionnel Chinois sp\u00e9cialis\u00e9 dans les transformateurs de puissance et des r\u00e9acteurs de plus de 50 ans. Les produits de pointe sont transformateur monophas\u00e9, triphas\u00e9 transformateurs d'isolement, transformateur \u00e9lectrique, transformateur de distribution, l'\u00e9tape vers le bas et d'intensifier le transformateur de basse tension du transformateur, transformateur \u00e0 haute tension, contr\u00f4le de transformateur toro\u00efdal transformateur, transformateur R-core; inductances DC, AC r\u00e9acteurs, le filtrage du r\u00e9acteur, de ligne et de charge du r\u00e9acteur, des bobines, le filtrage du r\u00e9acteur, et interm\u00e9diaire, \u00e0 haute fr\u00e9quence produits<\/a>.<\/p>\n

Nos transformateurs de puissance et les r\u00e9acteurs sont largement utilis\u00e9s dans les 10 domaines d'application: transport en commun rapide, les machines de construction, les \u00e9nergies renouvelables, intelligents de fabrication, des \u00e9quipements m\u00e9dicaux, de la mine de charbon de l'explosion de la pr\u00e9vention, de l'excitation du syst\u00e8me, frittage sous vide(four), d'une climatisation centrale.<\/p>\n

En savoir plus sur transformateur de puissance et le r\u00e9acteur: www.lstransformer.com<\/a>.<\/p>\n

Si vous souhaitez obtenir des solutions personnalis\u00e9es pour les transformateurs ou des r\u00e9acteurs, veuillez nous contacter.
\nWhatsApp\uff1a+86 13787095096
\nE-mail: marketing@hnlsdz.com<\/p>","protected":false},"excerpt":{"rendered":"

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’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 […]<\/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":"\nWhat 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. 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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":"fr-FR","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.lstransformer.com\/what-are-the-fault-classifications-of-transformers\/"]}]},{"@type":"ImageObject","inLanguage":"fr-FR","@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 transformateur de puissance, r\u00e9acteur de Ligne \u00e0 Haute tension transformateur d'Huile de transformateur immerg\u00e9-CHANGSHA LUSHAN ELECTRONIC TECHNOLOGY 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":"fr-FR"},{"@type":"Organization","@id":"https:\/\/www.lstransformer.com\/#organization","name":"LS transformateur de puissance, r\u00e9acteur de Ligne \u00e0 Haute tension transformateur d'Huile de transformateur immerg\u00e9-CHANGSHA LUSHAN ELECTRONIC TECHNOLOGY CO.,LTD","url":"https:\/\/www.lstransformer.com\/","logo":{"@type":"ImageObject","inLanguage":"fr-FR","@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":"fr-FR","@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\/fr\/author\/369703005\/"}]}},"_links":{"self":[{"href":"https:\/\/www.lstransformer.com\/fr\/wp-json\/wp\/v2\/posts\/1332","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.lstransformer.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.lstransformer.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.lstransformer.com\/fr\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lstransformer.com\/fr\/wp-json\/wp\/v2\/comments?post=1332"}],"version-history":[{"count":4,"href":"https:\/\/www.lstransformer.com\/fr\/wp-json\/wp\/v2\/posts\/1332\/revisions"}],"predecessor-version":[{"id":6766,"href":"https:\/\/www.lstransformer.com\/fr\/wp-json\/wp\/v2\/posts\/1332\/revisions\/6766"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.lstransformer.com\/fr\/wp-json\/wp\/v2\/media\/2706"}],"wp:attachment":[{"href":"https:\/\/www.lstransformer.com\/fr\/wp-json\/wp\/v2\/media?parent=1332"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lstransformer.com\/fr\/wp-json\/wp\/v2\/categories?post=1332"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lstransformer.com\/fr\/wp-json\/wp\/v2\/tags?post=1332"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}