{"id":44312,"date":"2024-01-03T10:02:50","date_gmt":"2024-01-03T09:02:50","guid":{"rendered":"https:\/\/www.gt-engineering.it\/?post_type=approfondimento&p=44312"},"modified":"2026-02-09T12:51:05","modified_gmt":"2026-02-09T11:51:05","slug":"six-symboles-cles-pour-la-securite-electrique","status":"publish","type":"approfondimento","link":"https:\/\/www.gt-engineering.it\/fr\/approfondissement\/securite-electrique\/six-symboles-cles-pour-la-securite-electrique\/","title":{"rendered":"Six symboles cl\u00e9s pour la s\u00e9curit\u00e9 \u00e9lectrique"},"content":{"rendered":"\n\n \n \n \n
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La s\u00e9curit\u00e9 \u00e9lectrique est bien standardis\u00e9e, en ce sens qu’il existe de nombreux documents techniques r\u00e9dig\u00e9s sur le sujet, normalement par la Commission \u00e9lectrotechnique internationale, ou IEC.<\/p>\n

Le probl\u00e8me est qu’en raison du grand nombre de personnes impliqu\u00e9es dans le processus de normalisation, la coordination est difficile et, par cons\u00e9quent, toutes les normes ne sont pas coh\u00e9rentes entre elles<\/strong>. Cela cr\u00e9e de la confusion.<\/p>\n

La confusion est \u00e9galement engendr\u00e9e par le fait que nos coll\u00e8gues nord-am\u00e9ricains utilisent parfois les termes \u00ab\u00a0Bonding\u00a0\u00bb (Liaison \u00e9quipotentielle) et \u00ab\u00a0Grounding\u00a0\u00bb (mise \u00e0 la terre) comme synonymes.<\/p>\n

L’objectif de cet article est de clarifier la signification de 6 symboles importants.<\/p>\n

Les premiers concernent trois fonctions \u00e9lectriques importantes : Isolation,\u00a0 Protection et Connexion<\/strong>.<\/p>\n

 <\/p>\n

SYMBOLE DE ISOLATION<\/u><\/strong> : il s’agit d’un concept cl\u00e9 de la s\u00e9curit\u00e9 \u00e9lectrique. L’isolement assure la protection des personnes effectuant des travaux \u00e9lectriques.<\/p>\n

 <\/p>\n

[IEC 61140:2016] 3. Termes et d\u00e9finitions <\/strong><\/em><\/p>\n

3.41 sectionnement<\/em><\/strong><\/p>\n

fonction destin\u00e9e \u00e0 assurer la mise hors tension et le maintien \u00e0 une distance ad\u00e9quate de <\/em>toute source d’\u00e9nergie \u00e9lectrique, pour des raisons de s\u00e9curit\u00e9<\/em><\/p><\/blockquote>\n

 <\/p>\n

Ci-dessous, le symbole d’un dispositif d’isolation comme par exemple un disjoncteur.<\/em><\/p>\n<\/div> <\/div>\n \n \n

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SYMBOLE DE PROTECTION<\/u><\/strong> : il s’agit de la protection d’une ligne ou d’un \u00e9quipement \u00e9lectrique contre les surcharges, les courts-circuits et les d\u00e9fauts \u00e0 la terre (contacts indirects ou protection contre les chocs \u00e9lectriques). Elle peut \u00eatre r\u00e9alis\u00e9e par un disjoncteur ou un interrupteur \u00e0 fusible.<\/p>\n

 <\/p>\n

[IEC 60947-2:2016] 2. Termes et d\u00e9finitions<\/strong><\/em><\/p>\n

2.1 disjoncteur<\/em><\/strong><\/p>\n

appareil m\u00e9canique de connexion capable d\u2019\u00e9tablir, de supporter et d\u2019interrompre des <\/em>courants dans les conditions normales du circuit, ainsi que d\u2019\u00e9tablir, de supporter pendant<\/em><\/p>\n

une dur\u00e9e sp\u00e9cifi\u00e9e et d\u2019interrompre des courants dans des conditions anormales sp\u00e9cifi\u00e9es <\/em>du circuit telles que celles du court-circuit<\/em><\/p><\/blockquote>\n

 <\/p>\n

Ci-dessous, le symbole d’un <\/em>disjoncteur<\/em><\/p>\n<\/div> <\/div>\n <\/div>\n \n \n <\/div>\n <\/section>\n\n \n\n\n\n\n \n \n \n

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SYMBOLE DE CONTACTEUR<\/u><\/strong> : il permet la mise sous tension ou hors tension d’une ligne.<\/p>\n

Un exemple de contacteur est le contacteur de puissance.<\/p>\n

 <\/p>\n

[IEC 60947-4-1] 3.3 Termes et d\u00e9finitions relatifs aux contacteurs<\/strong><\/em><\/p>\n

3.3.1 contacteur (m\u00e9canique)<\/em><\/strong><\/p>\n

appareil m\u00e9canique de connexion ayant une seule position de repos, command\u00e9 autrement<\/em><\/p>\n

qu’\u00e0 la main, capable d’\u00e9tablir, de supporter et d’interrompre des courants dans les conditions<\/em><\/p>\n

normales du circuit, y compris les conditions de surcharge en service<\/em><\/p><\/blockquote>\n<\/div> <\/div>\n \n \n

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Les trois derniers symboles sont li\u00e9s au concept de mise \u00e0 la terre<\/strong> et de Liaison \u00e9quipotentielle<\/strong>. N’oubliez pas que : Les syst\u00e8mes \u00e9lectriques sont reli\u00e9s \u00e0 la terre, tandis que les \u00e9quipements \u00e9lectriques ont une liaison \u00e9quipotentielle<\/strong> !<\/strong><\/p>\n

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SYMBOLE DE MISE \u00c0 LA TERRE<\/u><\/strong> : il signifie que la partie conductrice est reli\u00e9e \u00e0 la \u00a0\u00bb terre\u00a0\u00bb. Un exemple typique est le point neutre d’un transformateur MT\/BT pour cr\u00e9er un syst\u00e8me TN-S. \u00ab\u00a0Grounding<\/strong>\u00a0\u00bb est le terme utilis\u00e9 aux \u00c9tats-Unis et au Canada\u00a0; \u00ab\u00a0Earthing<\/strong>\u00a0\u00bb est le terme utilis\u00e9 dans la plupart des normes IEC.<\/p>\n

\u00a0<\/strong><\/p>\n

[IEC 60364-5-54]<\/em> 541.3 <\/strong>Termes et d\u00e9finitions<\/em><\/strong><\/p>\n

541.3.3 <\/strong>prise de terre – \u00e9lectrode de terre<\/em><\/strong><\/p>\n

Partie conductrice pouvant \u00eatre incorpor\u00e9e dans le sol ou dans un milieu conducteur<\/em><\/p>\n

particulier, par exemple b\u00e9ton, en contact \u00e9lectrique avec la Terre<\/em><\/p><\/blockquote>\n

Ci-apr\u00e8s le symbole:<\/p>\n<\/div> <\/div>\n \n \n

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SYMBOLE DE LIAISON EQUIPOTENTIELLE<\/u><\/strong> : <\/strong>Il d\u00e9signe la connexion d’une Partie Conductrice Expos\u00e9e<\/strong> au point neutre d’un transformateur MT\/BT, dans le cadre de la s\u00e9curit\u00e9 \u00e9lectrique d’un syst\u00e8me TN-S<\/strong>.<\/p>\n

 <\/p>\n

[IEC 60364-4-41] 411.3 Exigences pour la protection en cas de d\u00e9faut<\/strong><\/em><\/p>\n

411.3.1 Mise \u00e0 la terre et liaison \u00e9quipotentielle de protection<\/em><\/strong><\/p>\n

411.3.1.1 Mise \u00e0 la terre<\/em><\/strong><\/p>\n

Les masses doivent \u00eatre reli\u00e9es \u00e0 un conducteur de protection dans les conditions sp\u00e9cifiques du sch\u00e9ma des liaisons \u00e0 la terre comme sp\u00e9cifi\u00e9 de 411.4 \u00e0 411.6.<\/em><\/p>\n

Les masses simultan\u00e9ment accessibles doivent \u00eatre reli\u00e9es \u00e0 la m\u00eame prise de terre, individuellement, en groupes ou collectivement.<\/em><\/p>\n

Les conducteurs de protection doivent \u00eatre conformes aux exigences de l\u2019IEC 60364-5-54.<\/em><\/p>\n

Chaque circuit doit avoir son conducteur de protection reli\u00e9 \u00e0 la borne de terre correspondante.<\/em><\/p><\/blockquote>\n

 <\/p>\n

Ci-apr\u00e8s le symbole de \u00ab\u00a0Protective Earthing (PE)\u00a0\u00bb qui n\u2019indique pas la mise \u00e0 la terre, mais la liaison \u00e9quipotentielle de protection<\/strong> : il peut \u00eatre fix\u00e9 \u00e0 la borne d’une partie conductrice expos\u00e9e o\u00f9 le c\u00e2ble vert\/jaune est connect\u00e9.<\/p>\n<\/div> <\/div>\n \n \n

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Encore une fois : celui-ci est un symbole pour BONDING (liaison \u00e9quipotentielle de protection)<\/em> et non pour GROUNDING (EARTHING) mise \u00e0 la terre!<\/p>\n

 <\/p>\n

SYMBOLE DE ELEMENTS CONDUCTEURS ETRANGERS DE LA STRUCTURE<\/u><\/strong>: Les \u00e9l\u00e9ments conducteurs \u00e9trangers de la structure<\/em> doivent \u00eatre reli\u00e9es entre eux par une liaison \u00e9quipotentielle.<\/p>\n

 <\/p>\n

[IEC 60364-4-41] 411.3 Exigences pour la protection en cas de d\u00e9faut<\/strong><\/em><\/p>\n

411.3.1.2 Liaison \u00e9quipotentielle principale<\/em><\/strong><\/p>\n

Dans chaque b\u00e2timent, les parties m\u00e9talliques entrantes susceptibles d\u2019introduire une diff\u00e9rence de potentiel dangereuse et ne faisant pas partie de l\u2019installation \u00e9lectrique<\/strong> doivent \u00eatre connect\u00e9es \u00e0 la borne principale de terre par des conducteurs de liaison de protection<\/u><\/strong>; les parties m\u00e9talliques peuvent \u00eatre par exemple:<\/em><\/p><\/blockquote>\n

    \n
  • les canalisations d’alimentation \u00e0 l’int\u00e9rieur du b\u00e2timent, par exemple gaz, eau, installations de chauffage central;<\/em><\/li>\n
  • les \u00e9l\u00e9ments conducteurs \u00e9trangers de la structure;<\/em><\/li>\n
  • le renfort accessible de la construction en b\u00e9ton arm\u00e9.<\/em><\/li>\n<\/ul>\n

     <\/p>\n

    Ci-apr\u00e8s le symbole de protection de liaison \u00e9quipotentielle (PB) utilis\u00e9 pour connecter les \u00e9l\u00e9ments conducteurs \u00e9trangers de la structure. Il peut \u00eatre fix\u00e9 \u00e0 la borne d’une \u00e9l\u00e9ments conducteurs \u00e9trangers de la structure o\u00f9 le c\u00e2ble vert\/jaune est connect\u00e9.<\/p>\n<\/div> <\/div>\n \n \n

    <\/div>\n \n\n <\/div>\n <\/section>\n\n \n\n\n\n\n \n \n \n
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     <\/p>\n<\/div> <\/div>\n \n \n

    <\/div>\n \n\n <\/div>\n <\/section>\n\n \n","protected":false},"excerpt":{"rendered":"

    La s\u00e9curit\u00e9 \u00e9lectrique est bien standardis\u00e9e, en ce sens qu\u2019il existe de nombreux documents techniques r\u00e9dig\u00e9s sur le sujet, normalement par la Commission \u00e9lectrotechnique internationale, ou IEC.<\/p>\n","protected":false},"author":2,"featured_media":44114,"parent":0,"menu_order":26,"template":"","meta":{"_acf_changed":false,"footnotes":""},"tipologia_approfondimento":[158],"class_list":["post-44312","approfondimento","type-approfondimento","status-publish","has-post-thumbnail","hentry","tipologia_approfondimento-securite-electrique"],"acf":{"sottotitolo":"","allegati":null},"yoast_head":"\nSix symboles cl\u00e9s pour la s\u00e9curit\u00e9 \u00e9lectrique - Gt-Engineering<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.gt-engineering.it\/fr\/approfondissement\/securite-electrique\/six-symboles-cles-pour-la-securite-electrique\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Six symboles cl\u00e9s pour la s\u00e9curit\u00e9 \u00e9lectrique - 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