{"id":58240,"date":"2025-06-09T10:24:41","date_gmt":"2025-06-09T08:24:41","guid":{"rendered":"https:\/\/lcsn2025.dev-labaleine.fr\/?p=58240"},"modified":"2026-09-15T14:27:46","modified_gmt":"2026-09-15T12:27:46","slug":"how-harmonics-affect-electrical-transformers","status":"publish","type":"post","link":"https:\/\/www.lecosinus.fr\/en\/quel-est-limpact-des-harmoniques-sur-le-transformateur-electrique\/","title":{"rendered":"What is the impact of harmonics on the electrical transformer?"},"content":{"rendered":"<p class=\"wp-block-paragraph\">In modern electrical networks, harmonics are increasingly present, especially with the generalization of electronic equipment and converters. At Le Cosinus, a French manufacturer of electrical transformers since 1954, we support our customers in understanding and controlling these disturbances.<\/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\/What-is-the-impact-of-harmonics-on-the-electrical-transformer.png\" alt=\"Infographic illustrating the effects of harmonics on an electrical transformer: overheating, derating, premature aging, and voltage distortion.\" class=\"wp-image-86867\" srcset=\"https:\/\/www.lecosinus.fr\/wp-content\/uploads\/2026\/09\/What-is-the-impact-of-harmonics-on-the-electrical-transformer.png 1200w, https:\/\/www.lecosinus.fr\/wp-content\/uploads\/2026\/09\/What-is-the-impact-of-harmonics-on-the-electrical-transformer-300x300.png 300w, https:\/\/www.lecosinus.fr\/wp-content\/uploads\/2026\/09\/What-is-the-impact-of-harmonics-on-the-electrical-transformer-1024x1024.png 1024w, https:\/\/www.lecosinus.fr\/wp-content\/uploads\/2026\/09\/What-is-the-impact-of-harmonics-on-the-electrical-transformer-150x150.png 150w, https:\/\/www.lecosinus.fr\/wp-content\/uploads\/2026\/09\/What-is-the-impact-of-harmonics-on-the-electrical-transformer-768x768.png 768w, https:\/\/www.lecosinus.fr\/wp-content\/uploads\/2026\/09\/What-is-the-impact-of-harmonics-on-the-electrical-transformer-12x12.png 12w, https:\/\/www.lecosinus.fr\/wp-content\/uploads\/2026\/09\/What-is-the-impact-of-harmonics-on-the-electrical-transformer-600x600.png 600w, https:\/\/www.lecosinus.fr\/wp-content\/uploads\/2026\/09\/What-is-the-impact-of-harmonics-on-the-electrical-transformer-100x100.png 100w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">What is a harmonic?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Harmonics are multiple sinusoidal components of the fundamental frequency of the lattice (50 Hz or 60 Hz). They are generated by nonlinear loads such as variable speed drives, switching power supplies, or certain industrial equipment.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The effects of harmonics on the electrical transformer&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La pr\u00e9sence d\u2019harmoniques dans un r\u00e9seau impacte directement le fonctionnement et la <a href=\"https:\/\/www.lecosinus.fr\/en\/electrical-transformer-lifespan\/\" data-type=\"link\" data-id=\"https:\/\/www.lecosinus.fr\/quelle-est-la-duree-de-vie-dun-transformateur-electrique\/\">dur\u00e9e de vie des transformateurs<\/a>. Les impacts sont les suivants\u202f:\u202f\u00a0<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>La Surchauffe du transformateur<\/strong><strong>\u202f<\/strong><strong>:<\/strong>\u202fLes harmoniques provoquent une augmentation des pertes fer et cuivre par courant de foucault, g\u00e9n\u00e9rant un \u00e9chauffement suppl\u00e9mentaire non n\u00e9gligeable du transformateur.\u202f&nbsp;<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Transformer decommissioning, which involves using a transformer at a lower load than it was designed for (or taking a more powerful transformer), is not a solution. Indeed, this will have a moderate impact on copper losses, but none on iron losses. The iron will continue to overheat.&nbsp;<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"translation-block\"><strong>Accelerated aging,<\/strong> temperature rise, and additional stresses reduce the life of insulators and windings.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"translation-block\"><strong>Voltage distortions,<\/strong> harmonics degrade the quality of the output voltage, which will no longer be perfectly sinusoidal, which can disrupt the connected equipment.\u202f\u202f<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">How does Le Cosinus set up its electrical transformers in the face of harmonics?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">At Le Cosinus, we design and manufacture standard and custom-made transformers, capable of withstanding environments disturbed by harmonics:&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">To do this, we can act on several parameters:&nbsp;<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The use of materials and conductive sections adjusted to limit losses.&nbsp;<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Adapt the electromagnetic induction of transformers to limit the heating linked to iron losses.&nbsp;<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Integration of control sockets to adapt the induction of the transformer.&nbsp;<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">We are able to apply these adaptations to all our transformers at all frequencies (50 Hz, 60 Hz, 400 Hz and more) and also to specific applications such as wavetrain or phase angle dimmers for example.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Conclusion<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Harmonics represent a major technical challenge to guarantee the performance of transformers, the efficiency, durability and reliability of electrical installations over time. Thanks to nearly 80 years of expertise, Le Cosinus supports manufacturers and electricians with adapted, reliable and sustainable solutions.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph translation-block\">Need a harmonic-resistant transformer?\u202f\n<br>Contact us and entrust us with your specifications: we will offer you the solution best suited to your needs.<\/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\">\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\">\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\" \/>\n  <\/a>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Dans les r\u00e9seaux \u00e9lectriques modernes, les harmoniques sont des ph\u00e9nom\u00e8nes de plus en plus pr\u00e9sents, notamment avec la g\u00e9n\u00e9ralisation des \u00e9quipements \u00e9lectroniques et convertisseurs. Chez Le Cosinus, fabricant fran\u00e7ais de transformateurs \u00e9lectriques depuis 1954, nous accompagnons nos clients pour comprendre et ma\u00eetriser ces perturbations.\u202f Qu&rsquo;est-ce qu&rsquo;une harmonique ? Les harmoniques sont des composantes sinuso\u00efdales multiples [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":86867,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_seopress_titles_title":"L\u2019impact des harmoniques sur le transformateur | Le Cosinus","_seopress_titles_desc":"Transformateur isolement harmonique : d\u00e9couvrez l\u2019impact des harmoniques sur le transformateur \u00e9lectrique et les solutions pour r\u00e9duire surchauffe et pertes.","_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":"impact des harmoniques sur le transformateur,limpact des harmoniques sur le transformateur,hramoniques","_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":[24],"tags":[],"class_list":["post-58240","post","type-post","status-publish","format-standard","has-post-thumbnail","category-securite"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.lecosinus.fr\/en\/wp-json\/wp\/v2\/posts\/58240","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\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lecosinus.fr\/en\/wp-json\/wp\/v2\/comments?post=58240"}],"version-history":[{"count":8,"href":"https:\/\/www.lecosinus.fr\/en\/wp-json\/wp\/v2\/posts\/58240\/revisions"}],"predecessor-version":[{"id":96354,"href":"https:\/\/www.lecosinus.fr\/en\/wp-json\/wp\/v2\/posts\/58240\/revisions\/96354"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.lecosinus.fr\/en\/wp-json\/wp\/v2\/media\/86867"}],"wp:attachment":[{"href":"https:\/\/www.lecosinus.fr\/en\/wp-json\/wp\/v2\/media?parent=58240"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lecosinus.fr\/en\/wp-json\/wp\/v2\/categories?post=58240"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lecosinus.fr\/en\/wp-json\/wp\/v2\/tags?post=58240"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}