{"id":1345,"date":"2026-07-22T05:33:12","date_gmt":"2026-07-22T05:33:12","guid":{"rendered":"https:\/\/lstransformer.com\/tests-required-for-vacuum-epoxy-resin-cast-transformers\/"},"modified":"2026-09-28T15:54:11","modified_gmt":"2026-09-28T15:54:11","slug":"tests-required-for-vacuum-epoxy-resin-cast-transformers","status":"publish","type":"post","link":"https:\/\/www.lstransformer.com\/fr\/tests-required-for-vacuum-epoxy-resin-cast-transformers\/","title":{"rendered":"Tests Required for Vacuum Epoxy Resin Cast Transformers"},"content":{"rendered":"<p><a href=\"https:\/\/www.lstransformer.com\/fr\/Transformers\/\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" class=\"aligncenter\" title=\"80\" src=\"https:\/\/manage.lstransformer.com\/upload\/news\/1742634058722569.jpg\" alt=\"undefined\" \/><\/a><\/p>\n<p>Vacuum epoxy resin cast transformers are widely used due to their various advantages, including low noise, low partial discharge, high reliability, and long service life. To ensure the safe and stable operation of these transformers, several tests need to be conducted before putting them into operation.<\/p>\n<h6 style=\"padding-left: 40px;\"><strong>(1) Insulation resistance test: <\/strong><\/h6>\n<p style=\"padding-left: 40px;\">This test is performed to ensure the proper insulation resistance of the transformer windings. A megger is used to measure the insulation resistance between the winding and ground. The recommended value for insulation resistance is 1 megaohm or higher.<\/p>\n<h6 style=\"padding-left: 40px;\"><strong>(2) Ratio test: <\/strong><\/h6>\n<p style=\"padding-left: 40px;\">The ratio test is conducted to verify the turns ratio of the transformer. The actual turns ratio is measured and compared with the design specification.<\/p>\n<h6 style=\"padding-left: 40px;\"><strong>(3) Polarity test: <\/strong><\/h6>\n<p style=\"padding-left: 40px;\">The polarity test is performed to determine the polarity of the transformer windings. This test is essential to ensure that the transformer windings are correctly connected.<\/p>\n<h6 style=\"padding-left: 40px;\"><strong>(4) Winding resistance test: <\/strong><\/h6>\n<p style=\"padding-left: 40px;\">The winding resistance test is performed to determine the resistance of the transformer windings. This test is used to check the correctness of the transformer design and to identify any faulty winding.<\/p>\n<h6 style=\"padding-left: 40px;\"><strong>(5) No-load loss and excitation current test: <\/strong><\/h6>\n<p style=\"padding-left: 40px;\">The no-load loss and excitation current test is conducted to determine the no-load loss and excitation current of the transformer. These values are important for calculating the efficiency of the transformer.<\/p>\n<h6 style=\"padding-left: 40px;\"><strong>(6) Load loss and impedance voltage test: <\/strong><\/h6>\n<p style=\"padding-left: 40px;\">The load loss and impedance voltage test is conducted to determine the load loss and impedance voltage of the transformer. These values are essential for calculating the regulation and efficiency of the transformer.<\/p>\n<h6 style=\"padding-left: 40px;\"><strong>(7) Insulation level test: <\/strong><\/h6>\n<p style=\"padding-left: 40px;\">The insulation level test is conducted to determine the insulation strength of the transformer. This test is essential to ensure the transformer&#8217;s ability to withstand the specified voltage without any insulation failure.<\/p>\n<p>In conclusion, these tests are essential to ensure the safe and reliable operation of vacuum epoxy resin cast transformers. Properly conducted tests can detect any faults or defects in the transformer, enabling corrective measures to be taken before putting the transformer into operation.<\/p>\n<p>Additionally, before commissioning, the vacuum epoxy casting transformer should undergo insulation resistance tests, oil pressure tests, and dielectric strength tests to ensure that it meets the safety and performance standards. These tests help to identify any potential issues and ensure that the transformer is functioning correctly before being put into operation.<\/p>\n<h2><strong>Contact<\/strong><\/h2>\n<p>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 <a href=\"https:\/\/www.lstransformer.com\/fr\/\">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<p>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<p>En savoir plus sur transformateur de puissance et le r\u00e9acteur: <a href=\"https:\/\/www.lstransformer.com\/fr\/\">www.lstransformer.com<\/a>.<\/p>\n<p>Si vous souhaitez obtenir des solutions personnalis\u00e9es pour les transformateurs ou des r\u00e9acteurs, veuillez nous contacter.<br \/>\nWhatsApp\uff1a+86 13787095096<br \/>\nE-mail: marketing@hnlsdz.com<\/p>","protected":false},"excerpt":{"rendered":"<p>Vacuum epoxy resin cast transformers are widely used due to their various advantages, including low noise, low partial discharge, high reliability, and long service life. To ensure the safe and stable operation of these transformers, several tests need to be conducted before putting them into operation. (1) Insulation resistance test: This test is performed to [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":2742,"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-1345","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>Tests Required for Vacuum Epoxy Resin Cast Transformers - LS power transformer, Line reactor, High-voltage transformer, Oil-immersed transformer-CHANGSHA LUSHAN ELECTRONIC TECHNOLOGY CO.,LTD<\/title>\n<meta name=\"description\" content=\"Vacuum epoxy resin cast transformers are widely used due to their various advantages, including low noise, low partial discharge, high reliability, and long service life. 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