{"id":114297,"date":"2026-08-21T17:06:43","date_gmt":"2026-08-21T15:06:43","guid":{"rendered":"https:\/\/preprod.marechal.com\/electromagnetic-compatibility-expert-sheet\/"},"modified":"2026-09-10T13:44:11","modified_gmt":"2026-09-10T11:44:11","slug":"electromagnetic-compatibility-expert-sheet","status":"publish","type":"page","link":"https:\/\/marechal.com\/en\/electromagnetic-compatibility-expert-sheet\/","title":{"rendered":"Electromagnetic compatibility expert sheet"},"content":{"rendered":"<header\n    class=\"hero-page hero-page--centered\"\n    >\n            <img class=\"hero-page__bg\" src=\"https:\/\/marechal.com\/wp-content\/uploads\/2026\/08\/marechal-header-expert-sheets-background-scaled.webp\" srcset=\"https:\/\/marechal.com\/wp-content\/uploads\/2026\/08\/marechal-header-expert-sheets-background-scaled.webp 2560w, https:\/\/marechal.com\/wp-content\/uploads\/2026\/08\/marechal-header-expert-sheets-background-300x101.webp 300w, https:\/\/marechal.com\/wp-content\/uploads\/2026\/08\/marechal-header-expert-sheets-background-1024x344.webp 1024w, https:\/\/marechal.com\/wp-content\/uploads\/2026\/08\/marechal-header-expert-sheets-background-768x258.webp 768w, https:\/\/marechal.com\/wp-content\/uploads\/2026\/08\/marechal-header-expert-sheets-background-1536x516.webp 1536w, https:\/\/marechal.com\/wp-content\/uploads\/2026\/08\/marechal-header-expert-sheets-background-2048x688.webp 2048w\" sizes=\"100vw\" alt=\"\" aria-hidden=\"true\" fetchpriority=\"high\" loading=\"eager\" decoding=\"async\" \/>\n        \n    <div class=\"hero-page__content\">\n        <div class=\"hero-page__container\">\n                                                <h1 class=\"hero-page__title\">Electromagnetic<br \/>compatibility<br \/>expert sheet<\/h1>                                                                    <\/div>\n    <\/div>\n\n        <\/header>\n\n\n\n<h2 class=\"wp-block-heading has-text-align-center\">Technical aspects<\/h2>\n\n\n<section class=\"expertise-section expertise-section--two-columns expertise-section--dark\">\n\n    \n        <div class=\"container\">\n                        \n            \n                <div class=\"expertise-section__cols expertise-section__cols--two-text\">\n                    <div class=\"expertise-section__col expertise-section__col--text\">\n                                                    <div class=\"expertise-section__text\"><p>Electronic variable speed drives are widely used in the industrial and Ex sectors. They offer many advantages for motor users:  <\/p>\n<ul>\n<li>high efficiency and reliability<\/li>\n<li>precise steering<\/li>\n<li>flexible use for all requirements<\/li>\n<li>optimised engine service life<\/li>\n<\/ul>\n<p> Variable speed drives use electronic switches (diodes, thyristors, IGBT transistors, etc.) to vary the frequency of the engine&#8217;s power supply, thereby controlling its speed.<\/p>\n<\/div>\n                                            <\/div>\n                    <div class=\"expertise-section__col expertise-section__col--text\">\n                                                    <div class=\"expertise-section__text\"><p>The switch action generates harmful electromagnetic pollution which is conducted and radiated throughout the installation. This pollution consists of:  <\/p>\n<ul>\n<li>current\/voltage harmonics<\/li>\n<li>high-frequency (HF) interference, generally between 2 and 16 kHz. It can cause equipment failure due to overloads or loss of operation due to unexpected tripping of protection systems <\/li>\n<\/ul>\n<p> To offset these risks, variable speed drive manufacturers use filters to eliminate the harmonics created.<\/p>\n<\/div>\n                                            <\/div>\n                <\/div>\n\n                    <\/div>\n\n    <\/section>\n\n\n<section class=\"expertise-section expertise-section--text expertise-section--dark expertise-section--text-center\">\n\n    \n        <div class=\"container\">\n                        \n            \n                                    <div class=\"expertise-section__text\">\n                        <p><strong>Users must select and install equipment in such a way as to limit HF interference as much as possible. State-of-the-art protection systems are available. <\/strong><\/p>\n<p><strong>These consist of:<\/strong><\/p>\n                    <\/div>\n                                \n                    <\/div>\n\n    <\/section>\n\n\n<div class=\"cards-carousel\"     data-navigation=\"pagination\"\n     data-per-view=\"3\"\n     data-centered=\"1\"\n     data-space-between=\"0\">\n            <div class=\"swiper\">\n                <div class=\"swiper-wrapper\">\n                            <div class=\"swiper-slide\">\n                                                                    <div class=\"cards-carousel__frame\">\n                                                                                                                                                <div class=\"cards-carousel__halo\" aria-hidden=\"true\"><\/div>\n                                                                                                                    <div class=\"cards-carousel__text\"><p>Using screened cables to connect the drive to the engine, with the screening earthed at both ends<\/p>\n<\/div>\n                                                    <\/div>\n                                    <\/div>\n                            <div class=\"swiper-slide\">\n                                                                    <div class=\"cards-carousel__frame\">\n                                                                                                                                                <div class=\"cards-carousel__halo\" aria-hidden=\"true\"><\/div>\n                                                                                                                    <div class=\"cards-carousel__text\"><p>Separating the control and power circuits by screening or distances<\/p>\n<\/div>\n                                                    <\/div>\n                                    <\/div>\n                            <div class=\"swiper-slide\">\n                                                                    <div class=\"cards-carousel__frame\">\n                                                                                                                                                <div class=\"cards-carousel__halo\" aria-hidden=\"true\"><\/div>\n                                                                                                                    <div class=\"cards-carousel__text\"><p>Using earthed screens around the drive and the engine<\/p>\n<\/div>\n                                                    <\/div>\n                                    <\/div>\n                            <div class=\"swiper-slide\">\n                                                                    <div class=\"cards-carousel__frame\">\n                                                                                                                                                <div class=\"cards-carousel__halo\" aria-hidden=\"true\"><\/div>\n                                                                                                                    <div class=\"cards-carousel__text\"><p>Limit the length of the cables linking the variable speed drive to the engine<\/p>\n<\/div>\n                                                    <\/div>\n                                    <\/div>\n                    <\/div>\n                    <\/div>\n                        <div class=\"swiper-pagination\"><\/div>\n    <\/div>\n\n\n<section class=\"expertise-section expertise-section--text expertise-section--dark expertise-section--text-center\">\n\n    \n        <div class=\"container\">\n                        \n            \n                                    <div class=\"expertise-section__text\">\n                        <p><strong>To meet these requirements, MARECHAL ELECTRIC has developed a passive, high-performance solution that is easy to install and consists in selecting:<\/strong><\/p>\n                    <\/div>\n                                \n                    <\/div>\n\n    <\/section>\n\n\n<section class=\"text-columns text-columns--numbered\">\n    <div class=\"container\">\n        <div class=\"text-columns__inner\">\n                            <div class=\"text-columns__col\">\n                                            <div class=\"text-columns__text\"><p><strong>metal-clad appliances<\/strong><\/p>\n<\/div>\n                                                        <\/div>\n                            <div class=\"text-columns__col\">\n                                            <div class=\"text-columns__text\"><p><strong>metal accessories<br \/>(handle, box, sleeve, socket)<\/strong><\/p>\n<\/div>\n                                                        <\/div>\n                            <div class=\"text-columns__col\">\n                                            <div class=\"text-columns__text\"><p><strong>cable glands (PE) with suitable screening, supplied by MARECHAL ELECTRIC<\/strong><\/p>\n<\/div>\n                                                        <\/div>\n                    <\/div>\n    <\/div>\n<\/section>\n\n\n<section class=\"expertise-section expertise-section--text expertise-section--dark expertise-section--text-center\">\n\n    \n        <div class=\"container\">\n                        \n            \n                                    <div class=\"expertise-section__text\">\n                        <p>The EMC performance of MARECHAL<sup>\u00ae<\/sup> appliances was measured by the Laboratoire National d&#8217;Essai (LNE &#8211; France) in 2022.<\/p>\n<p>The tests carried out are based on the requirements of standard ISO 11452-4, and involve measuring the transmission efficiency of the current\/signal passing through MARECHAL<sup>\u00ae<\/sup> appliances, for frequencies ranging from:<\/p>\n<p>&#8211; 0 Hz to 20 kHz (range of disturbances generated by variable speed drives): the losses measured are negligible (identified in red on the graph),<\/p>\n<p>&#8211; 20 kHz to 500,000 kHz: measured losses fluctuate between -2 dB and -33 dB.<\/p>\n<p>The MARECHAL<sup>\u00ae<\/sup> solution is perfectly suited to applications implementing variable speed drives.<\/p>\n                    <\/div>\n                                \n                    <\/div>\n\n    <\/section>\n\n\n<section class=\"cta-final cta-final--dark cta-final--has-video\">\n            <video\n            class=\"cta-final__video\"\n            autoplay muted loop playsinline preload=\"none\"\n            data-lazy-video=\"viewport\"\n            data-src=\"https:\/\/marechal.com\/wp-content\/uploads\/2026\/07\/marechal-homepage-contact-background.mp4\"\n        ><\/video>\n    \n    <div class=\"cta-final__container\">\n        <div class=\"cta-final__text\">\n                            <span class=\"cta-final__surtitle\">State-of-the-art technology<\/span>                        <h2 class=\"cta-final__title\">Choose MARECHAL ELECTRIC<\/h2>        <\/div>\n        <div class=\"cta-final__action\">\n            <a class=\"btn-arrow cta-final__btn\" href=\"\/en\/contact\">\n                <span class=\"btn-arrow__label\">CONTACT US<\/span>\n                <span class=\"btn-arrow__arrow\" aria-hidden=\"true\"><\/span>\n            <\/a>\n        <\/div>\n    <\/div>\n<\/section>\n","protected":false},"excerpt":{"rendered":"<p>Technical aspects<\/p>\n","protected":false},"author":115,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"templates\/template-expertise.php","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-114297","page","type-page","status-publish"],"acf":[],"_links":{"self":[{"href":"https:\/\/marechal.com\/en\/wp-json\/wp\/v2\/pages\/114297","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/marechal.com\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/marechal.com\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/marechal.com\/en\/wp-json\/wp\/v2\/users\/115"}],"replies":[{"embeddable":true,"href":"https:\/\/marechal.com\/en\/wp-json\/wp\/v2\/comments?post=114297"}],"version-history":[{"count":1,"href":"https:\/\/marechal.com\/en\/wp-json\/wp\/v2\/pages\/114297\/revisions"}],"predecessor-version":[{"id":119479,"href":"https:\/\/marechal.com\/en\/wp-json\/wp\/v2\/pages\/114297\/revisions\/119479"}],"wp:attachment":[{"href":"https:\/\/marechal.com\/en\/wp-json\/wp\/v2\/media?parent=114297"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}