{"id":89978,"date":"2026-03-10T12:47:00","date_gmt":"2026-03-10T11:47:00","guid":{"rendered":"https:\/\/www.lecosinus.fr\/?p=89978"},"modified":"2026-09-16T10:39:31","modified_gmt":"2026-09-16T08:39:31","slug":"understanding-the-ecodesign-directive-for-electrical-transformers","status":"publish","type":"post","link":"https:\/\/www.lecosinus.fr\/en\/comprendre-la-directive-ecodesign-appliquee-aux-transformateurs-electriques\/","title":{"rendered":"Understanding the Ecodesign Directive for Electrical Transformers"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Since 1 July 2021, an important milestone has been reached for transformer manufacturers and users across Europe with the entry into force of Phase 2 (Tier 2) of the Ecodesign Directive. Behind this regulatory framework lies a clear objective: to reduce energy losses and improve the efficiency of transformers placed on the European market.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The reference legislation is Commission Regulation (EU) No. 548\/2014, as amended by the 2019 consolidated version. However, navigating the legal provisions and technical tables can make it difficult to understand the practical implications for industrial projects and electrical installations. <\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/www.lecosinus.fr\/wp-content\/uploads\/2026\/09\/Ecodesign-Directive-Whats-Changing-for-Transformers.png\" alt=\"Quelles-sont les-modifications apportees-par-la-directive-ecodesign-aux-transformateurs\" class=\"wp-image-89988\" srcset=\"https:\/\/www.lecosinus.fr\/wp-content\/uploads\/2026\/09\/Ecodesign-Directive-Whats-Changing-for-Transformers.png 1200w, https:\/\/www.lecosinus.fr\/wp-content\/uploads\/2026\/09\/Ecodesign-Directive-Whats-Changing-for-Transformers-300x300.png 300w, https:\/\/www.lecosinus.fr\/wp-content\/uploads\/2026\/09\/Ecodesign-Directive-Whats-Changing-for-Transformers-1024x1024.png 1024w, https:\/\/www.lecosinus.fr\/wp-content\/uploads\/2026\/09\/Ecodesign-Directive-Whats-Changing-for-Transformers-150x150.png 150w, https:\/\/www.lecosinus.fr\/wp-content\/uploads\/2026\/09\/Ecodesign-Directive-Whats-Changing-for-Transformers-768x768.png 768w, https:\/\/www.lecosinus.fr\/wp-content\/uploads\/2026\/09\/Ecodesign-Directive-Whats-Changing-for-Transformers-12x12.png 12w, https:\/\/www.lecosinus.fr\/wp-content\/uploads\/2026\/09\/Ecodesign-Directive-Whats-Changing-for-Transformers-600x600.png 600w, https:\/\/www.lecosinus.fr\/wp-content\/uploads\/2026\/09\/Ecodesign-Directive-Whats-Changing-for-Transformers-100x100.png 100w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Low-Power Transformers<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Under the Directive, a transformer is considered low-power when its highest voltage does not exceed 1.1 kV. The regulation applies to all transformers with a rated power of at least 1 kVA. This includes the vast majority of low-voltage\/low-voltage (LV\/LV) transformers used in commercial buildings, industrial workshops, technical infrastructure, and similar applications.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pour cette cat\u00e9gorie, l&rsquo;Union europ\u00e9enne a choisi une approche fond\u00e9e sur la transparence plut\u00f4t que sur l&rsquo;imposition de seuils stricts. Aucun plafond de pertes n&rsquo;est fix\u00e9 pour les transformateurs <a href=\"https:\/\/www.lecosinus.fr\/en\/low-voltage-medium-voltage-high-voltage-how-to-tell-the-difference\/\" data-type=\"link\" data-id=\"https:\/\/www.lecosinus.fr\/basse-tension-bt-moyenne-tension-mt-et-haute-tension-ht-comment-les-differencier\/\">basse tension<\/a>. La raison est simple : leurs caract\u00e9ristiques et usages sont tr\u00e8s vari\u00e9s. Fixer une limite uniforme aurait \u00e9t\u00e9 peu adapt\u00e9 \u00e0 la r\u00e9alit\u00e9 du terrain.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">However, one requirement is mandatory: manufacturers must clearly state the <strong>no-load losses (P\u2080) and load losses (P\u2096)<\/strong> in the technical documentation. \n<ul>\n<br><strong><li>No-load losses (P\u2080) <\/strong>represent the energy consumed continuously by the transformer, even when it is not supplying a load. <\/&gt;\n\n&lt;br><strong><li>Load losses (P\u2096)<\/strong> represent the energy dissipated as heat when the transformer is operating under load.<\/ul><\/li><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The objective is to enable purchasers, consulting engineers, and facility operators to compare energy performance and select the most efficient solutions. \n\nFor low-voltage transformers, the Ecodesign Directive therefore does not impose minimum efficiency requirements, but it does require complete transparency regarding transformer losses.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Medium- and High-Power Transformers<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">When the operating voltage exceeds <strong>1.1 kV<\/strong>\u2014for example, a <strong>20 kV \/ 400 V<\/strong> transformer\u2014the requirements become significantly more stringent. \n\nIn this case, the Directive goes beyond information disclosure and establishes <strong>mandatory performance limits<\/strong>. Maximum permissible values for <strong>no-load losses (P\u2080)<\/strong> and <strong>load losses (P\u2096)<\/strong> are specified in detailed tables. These limits were tightened during the transition to <strong>Phase 2 (Tier 2)<\/strong>, with an average reduction of approximately <strong>10%<\/strong> compared with <strong>Phase 1<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Concr\u00e8tement, un <a href=\"https:\/\/www.lecosinus.fr\/en\/why-choose-a-dry-type-mv-transformer-over-an-oil-filled-transformer\/\" data-type=\"link\" data-id=\"https:\/\/www.lecosinus.fr\/pourquoi-choisir-un-transformateur-mt-sec-plutot-quun-transformateur-a-huile\/\">transformateur moyenne tension<\/a> qui d\u00e9passe ces valeurs ne peut plus \u00eatre mis sur le march\u00e9 ni mis en service au sein de l&rsquo;Union europ\u00e9enne. Certaines situations particuli\u00e8res \u00e9chappent toutefois \u00e0 ces exigences. C&rsquo;est notamment le cas des transformateurs de mesure, des appareils destin\u00e9s aux fours industriels ou au soudage, des \u00e9quipements install\u00e9s sur des plateformes offshore ou \u00e0 bord de navires, ainsi que des installations temporaires mises en place en cas d&rsquo;urgence.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The Ecodesign Directive has fundamentally changed the way transformers are designed, selected, and marketed across Europe. \n\n<br>For <strong>low-voltage transformers<\/strong>, it promotes transparency and energy-conscious decision-making. \n\n<br>For <strong>medium-voltage transformers<\/strong>, it establishes mandatory minimum energy performance requirements that must be met before a transformer can be marketed or put into service.<\/p>\n\n\n\n<div class=\"hs-cta-embed hs-cta-simple-placeholder hs-cta-embed-185420320831\" style=\"max-width:100%;max-height:100%;width:700px;height:239.53125px\" data-hubspot-wrapper-cta-id=\"185420320831\">\r\n  <a href=\"https:\/\/cta-service-cms2.hubspot.com\/web-interactives\/public\/v1\/track\/redirect?encryptedPayload=AVxigLJ%2B8uzXIlYd5F1Cg72GDEo4S1p9zzkqyLAlT3McWV%2BDNRWsrtcQFwhBihGlWDL3nSWdQscvugwJIEM%2Blo0sWyqvQjAIafWdESsEYmcGkml4PxESyXNVWWZLqCNHgrHd%2BIsg8qUJHAayrn2LojP7LZPyflwCywOPcg8taJdeZJCXxpOTHuE%3D&amp;webInteractiveContentId=185420320831&amp;portalId=48243687\" target=\"_blank\" rel=\"noopener\">\r\n    <img decoding=\"async\" alt=\"Demande de devis Saisissez votre r&eacute;f&eacute;rence produit ou indiquer les caract&eacute;ristiques du produit recherch&eacute; &nbsp;\" loading=\"lazy\" src=\"https:\/\/no-cache.hubspot.com\/cta\/default\/48243687\/interactive-185420320831.png\" style=\"height: 100%;width: 100%;object-fit: fill\" \/>\r\n  <\/a>\r\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>","protected":false},"excerpt":{"rendered":"<p>Depuis le 1er juillet 2021, un cap important a \u00e9t\u00e9 franchi pour les fabricants et utilisateurs de transformateurs en Europe avec l&rsquo;entr\u00e9e en vigueur de la Phase 2 (ou \u00ab Tier 2 \u00bb) de la directive Ecodesign. Derri\u00e8re ce terme r\u00e9glementaire se cache une ambition tr\u00e8s concr\u00e8te : r\u00e9duire les pertes d&rsquo;\u00e9nergie et am\u00e9liorer l&rsquo;efficacit\u00e9 [&hellip;]<\/p>\n","protected":false},"author":4387,"featured_media":89988,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_seopress_titles_title":"Directive Ecodesign transformateurs %%sep%% Le Cosinus","_seopress_titles_desc":"Directive \u00e9coconception des transformateurs Tier 2 (2021) : r\u00e9duction des pertes obligations des fabricants et impacts sur les installations \u00e9lectriques.","_seopress_robots_index":"","_seopress_robots_follow":"","_seopress_robots_imageindex":"","_seopress_robots_snippet":"","_seopress_robots_primary_cat":"none","_seopress_robots_breadcrumbs":"","_seopress_robots_freeze_modified_date":"","_seopress_robots_custom_modified_date":"","_seopress_robots_canonical":"","_seopress_social_fb_title":"","_seopress_social_fb_desc":"","_seopress_social_fb_img":"","_seopress_social_fb_img_attachment_id":0,"_seopress_social_fb_img_width":0,"_seopress_social_fb_img_height":0,"_seopress_social_twitter_title":"","_seopress_social_twitter_desc":"","_seopress_social_twitter_img":"","_seopress_social_twitter_img_attachment_id":0,"_seopress_social_twitter_img_width":0,"_seopress_social_twitter_img_height":0,"_seopress_redirections_value":"","_seopress_redirections_enabled":"","_seopress_redirections_enabled_regex":"","_seopress_redirections_logged_status":"both","_seopress_redirections_param":"","_seopress_redirections_type":301,"_seopress_analysis_target_kw":"ecodesign appliqu\u00e9e aux transformateurs \u00e9lectriques,Ecodesign,\u00e9coconception","_seopress_news_disabled":"","_seopress_video_disabled":"","_seopress_video":[],"_seopress_pro_schemas_manual":[],"_seopress_pro_rich_snippets_disable_all":"","_seopress_pro_rich_snippets_disable":[],"_seopress_pro_schemas":[],"content-type":"","footnotes":""},"categories":[21],"tags":[],"class_list":["post-89978","post","type-post","status-publish","format-standard","has-post-thumbnail","category-norme"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.lecosinus.fr\/en\/wp-json\/wp\/v2\/posts\/89978","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.lecosinus.fr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.lecosinus.fr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.lecosinus.fr\/en\/wp-json\/wp\/v2\/users\/4387"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lecosinus.fr\/en\/wp-json\/wp\/v2\/comments?post=89978"}],"version-history":[{"count":25,"href":"https:\/\/www.lecosinus.fr\/en\/wp-json\/wp\/v2\/posts\/89978\/revisions"}],"predecessor-version":[{"id":96514,"href":"https:\/\/www.lecosinus.fr\/en\/wp-json\/wp\/v2\/posts\/89978\/revisions\/96514"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.lecosinus.fr\/en\/wp-json\/wp\/v2\/media\/89988"}],"wp:attachment":[{"href":"https:\/\/www.lecosinus.fr\/en\/wp-json\/wp\/v2\/media?parent=89978"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lecosinus.fr\/en\/wp-json\/wp\/v2\/categories?post=89978"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lecosinus.fr\/en\/wp-json\/wp\/v2\/tags?post=89978"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}