{"id":1293,"date":"2026-07-22T05:33:09","date_gmt":"2026-07-22T05:33:09","guid":{"rendered":"https:\/\/lstransformer.com\/why-is-vacuum-drying-and-impregnation-necessary-for-windings\/"},"modified":"2026-09-27T15:59:50","modified_gmt":"2026-09-27T15:59:50","slug":"why-is-vacuum-drying-and-impregnation-necessary-for-windings","status":"publish","type":"post","link":"https:\/\/www.lstransformer.com\/es\/why-is-vacuum-drying-and-impregnation-necessary-for-windings\/","title":{"rendered":"Why is vacuum drying and impregnation necessary for windings?"},"content":{"rendered":"

Why is vacuum drying and impregnation necessary for windings?<\/b><\/h1>\n

Drying the winding helps to remove moisture from the insulation components. This not only enhances the insulation’s withstand voltage level but also causes the insulation to contract to its inherent dimensions, providing accurate and reasonable data about the winding’s axial height and tightening force.<\/p>\n

During the drying process of the winding, the following points should be considered: a. Windings that do not require vacuum drying can be processed along with those that require vacuum drying. b. For windings with and without electric wood barrels processed in the same container, the processing should follow the requirements for windings with electric wood barrels. c. The time between the winding coming out of the furnace and immersion in varnish should not exceed 12 hours. If it exceeds 12 to 16 hours, it needs to undergo atmospheric drying at 100 to 115 degrees Celsius for 14 hours. If the storage time is longer, reprocessing is required.<\/p>\n

Transformer windings typically use solventless insulation varnish for impregnation, and impregnation is required for windings with U \u2264 40.5kV.<\/p>\n

Multi-layered cylindrical windings have a higher number of layer insulation layers, resulting in higher moisture and gas content. To eliminate moisture and gas to ensure proper varnish impregnation, vacuum pressure impregnation is required.<\/p>\n

The purpose of impregnating the winding is to increase its mechanical strength. However, not impregnating the winding can increase electrical strength and contribute to better heat dissipation. Therefore, windings of high-voltage transformers (U \u2265 72.5kV) are usually not subjected to impregnation.<\/p>\n

After impregnation, preheating should be done at 70 to 80 degrees Celsius for 3 hours, followed by an increase in temperature to 105 to 115 degrees Celsius, maintaining it for 14 hours. For cylindrical windings, it needs to be maintained for 18 hours.<\/p>\n

It is noteworthy that the characteristics of coating for dry-type transformer windings are different: for shipboard and tropical dry-type transformer windings, they are typically impregnated with insulation varnish three times, followed by a final spray or immersion in grey varnish. General dry-type transformer windings are usually impregnated twice with insulation varnish.<\/p>\n

\"indefinido\"<\/a><\/p>\n

Contacto<\/h2>\n

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 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

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

Saber m\u00e1s acerca de transformadores de potencia y reactores: www.lstransformer.com<\/a>.<\/p>\n

Si desea obtener soluciones personalizadas para transformadores o reactores, p\u00f3ngase en contacto con nosotros.
\nWhatsApp\uff1a+86 13787095096
\nCorreo electr\u00f3nico: marketing@hnlsdz.com<\/p>","protected":false},"excerpt":{"rendered":"

Why is vacuum drying and impregnation necessary for windings? Drying the winding helps to remove moisture from the insulation components. This not only enhances the insulation’s withstand voltage level but also causes the insulation to contract to its inherent dimensions, providing accurate and reasonable data about the winding’s axial height and tightening force. During the […]<\/p>\n","protected":false},"author":3,"featured_media":4155,"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-1293","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-faq"],"yoast_head":"\nWhy is vacuum drying and impregnation necessary for windings? - LS power transformer, Line reactor, High-voltage transformer, Oil-immersed transformer-CHANGSHA LUSHAN ELECTRONIC TECHNOLOGY CO.,LTD<\/title>\n<meta name=\"description\" content=\"Drying the winding helps to remove moisture from the insulation components. 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