{"id":989313,"date":"2026-02-15T20:07:31","date_gmt":"2026-02-15T17:07:31","guid":{"rendered":"https:\/\/www.egesmuhendislik.com.tr\/?p=989313"},"modified":"2026-08-31T09:22:41","modified_gmt":"2026-08-31T06:22:41","slug":"sekonder-koruma-nedir-yg-ve-og-sistemlerinde-guvenlik","status":"publish","type":"post","link":"https:\/\/www.egesmuhendislik.com.tr\/fr\/quest-ce-que-la-protection-secondaire-securite-dans-les-reseaux-ht-et-mt\/","title":{"rendered":"Qu'est-ce que la protection secondaire ? S\u00e9curit\u00e9 dans les r\u00e9seaux HT et MT"},"content":{"rendered":"<div class=\"vgblk-rw-wrapper limit-wrapper\">\n<p class=\"wp-block-paragraph\">Pour garantir la continuit\u00e9 des r\u00e9seaux \u00e9lectriques et prot\u00e9ger les \u00e9quipements co\u00fbteux contre les pannes, il existe deux lignes de d\u00e9fense fondamentales : la protection primaire et la protection secondaire. En particulier dans les installations \u00e0 haute tension (HT) et \u00e0 moyenne tension (MT), on consid\u00e8re que le \u00ab cerveau \u00bb du syst\u00e8me est <strong>Qu'est-ce que la protection secondaire ?<\/strong> Nous r\u00e9pondrons \u00e0 cette question dans cet article.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Qu'est-ce que le \u00ab secondaire \u00bb ? Que signifie \u00ab secondaire \u00bb ?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Commen\u00e7ons par les termes techniques : <strong>Qu'est-ce qu'un \u00ab secondaire \u00bb ?<\/strong>? Au sens litt\u00e9ral, ce terme signifie \u00ab secondaire \u00bb ou \u00ab auxiliaire \u00bb. Dans les r\u00e9seaux \u00e9lectriques, <strong>Que signifie \u00ab secondaire \u00bb ?<\/strong> La r\u00e9ponse \u00e0 cette question est la suivante : il s'agit d'un circuit \u00e0 basse tension, isol\u00e9 du circuit d'alimentation principal, utilis\u00e9 \u00e0 des fins de mesure et de contr\u00f4le.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Qu'est-ce que la protection primaire ?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Pour comprendre le syst\u00e8me, il faut d'abord en conna\u00eetre les grandes lignes. <strong>Qu'est-ce que la protection primaire ?<\/strong>? Il s'agit d'\u00e9l\u00e9ments qui coupent physiquement le circuit principal. Par exemple, un fusible ou un disjoncteur assure une protection primaire en coupant directement le circuit lorsque le courant qui le traverse d\u00e9passe les limites fix\u00e9es.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Qu'est-ce que la protection secondaire dans les syst\u00e8mes YG et OG ?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Aux niveaux de tension plus \u00e9lev\u00e9s, mesurer ou couper le courant sur la ligne principale \u00e0 l'aide d'un appareil est \u00e0 la fois dangereux et co\u00fbteux. C'est l\u00e0 que <strong>Qu'est-ce que la protection secondaire ?<\/strong> la question se pose alors :<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Les donn\u00e9es relatives \u00e0 la ligne \u00e0 haute tension (courant et tension) sont r\u00e9duites par des transformateurs de mesure (transformateurs de courant et de tension), puis transmises au circuit secondaire. Les relais de protection secondaires surveillent en permanence ces valeurs r\u00e9duites. Si un d\u00e9faut (court-circuit, surintensit\u00e9, etc.) est d\u00e9tect\u00e9, le relais envoie une commande d\u2019\u00ab ouverture \u00bb qui d\u00e9clenche l\u2019\u00e9norme sectionneur (disconnecteur\/disjoncteur) de la ligne principale.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Qu'est-ce que le YG ? Que signifie YG ?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Terme fr\u00e9quemment utilis\u00e9 dans le jargon du secteur <strong>Qu'est-ce que \u00ab yg \u00bb ?<\/strong>? <strong>YG<\/strong>, c'est l'abr\u00e9viation de \u00ab haute tension \u00bb. Conform\u00e9ment \u00e0 la r\u00e9glementation relative aux installations \u00e9lectriques \u00e0 courant fort, les tensions sup\u00e9rieures \u00e0 1 000 volts (1 kV) rel\u00e8vent de cette cat\u00e9gorie. Alors, <strong>Que signifie \u00ab yg \u00bb ?<\/strong> Et pourquoi n\u00e9cessitent-elles une protection sp\u00e9cifique ? Les lignes \u00e0 haute tension (par exemple 154 kV ou 380 kV) transportent une \u00e9nergie colossale ; une d\u00e9faillance sur ces lignes peut provoquer, en quelques secondes, une explosion majeure ou un incendie de transformateur. C'est pourquoi la protection secondaire n'est pas une option, mais une n\u00e9cessit\u00e9 sur ces lignes.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Les avantages de la protection secondaire<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>S\u00e9curit\u00e9 :<\/strong> Les op\u00e9rateurs peuvent contr\u00f4ler le syst\u00e8me via des tableaux secondaires \u00e0 basse tension, sans avoir \u00e0 toucher la ligne \u00e0 haute tension.<\/li>\n\n\n\n<li><strong>Pr\u00e9cision :<\/strong> Les relais secondaires sont capables de d\u00e9tecter m\u00eame les variations d'erreur de l'ordre de la microseconde.<\/li>\n\n\n\n<li><strong>S\u00e9lectivit\u00e9 :<\/strong> Si la panne se limite \u00e0 la zone concern\u00e9e, le fait de d\u00e9clencher uniquement le disjoncteur de cette zone permet d'\u00e9viter que l'ensemble de l'installation ne soit priv\u00e9 d'\u00e9lectricit\u00e9.<\/li>\n<\/ul>\n<\/div><!-- .vgblk-rw-wrapper -->","protected":false},"excerpt":{"rendered":"<p>Pour garantir la continuit\u00e9 des r\u00e9seaux \u00e9lectriques et prot\u00e9ger les \u00e9quipements co\u00fbteux contre les pannes, il existe deux lignes de d\u00e9fense fondamentales : la protection primaire et la protection secondaire. Dans cet article, nous allons r\u00e9pondre \u00e0 la question suivante : qu\u2019est-ce que la protection secondaire, consid\u00e9r\u00e9e comme le \u00ab cerveau \u00bb du syst\u00e8me, notamment dans les installations \u00e0 haute tension (HT) et \u00e0 moyenne tension (MT) ? Qu'est-ce que la protection secondaire ? Que signifie \u00ab secondaire \u00bb ? Commen\u00e7ons par les termes techniques : qu'est-ce que la protection secondaire ? Au sens litt\u00e9ral, cela signifie \u00ab secondaire \u00bb ou \u00ab auxiliaire \u00bb\u2026<\/p>","protected":false},"author":1,"featured_media":989314,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[201,199,198,197,200,202],"class_list":["post-989313","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-makaleler","tag-primer-koruma-nedir","tag-sekonder-koruma-nedir","tag-sekonder-ne-demek","tag-sekonder-nedir","tag-yg-ne-demek","tag-yg-nedir"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Sekonder Koruma Nedir? 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