{"id":38673,"date":"2023-01-04T16:36:31","date_gmt":"2023-01-04T15:36:31","guid":{"rendered":"https:\/\/www.gt-engineering.it\/?post_type=normativa_tecnica&#038;p=38673"},"modified":"2023-07-12T11:44:19","modified_gmt":"2023-07-12T10:44:19","slug":"annexe-f-estimation-du-ccf","status":"publish","type":"normativa_tecnica","link":"https:\/\/www.gt-engineering.it\/fr\/reglements-techniques\/normes-en-iso\/en-iso-13849-1-securite-fonctionnelle-des-machines\/annexe-f-estimation-du-ccf\/","title":{"rendered":"Annexe F : Estimation du CCF"},"content":{"rendered":"\n\n    \n        <section\n            data-name=\"Contenuto testuale con immagine\"\n            class=\"bow-gte-testo-media u-spacer-base\"\n            id=\"\"\n        >\n            \n<div class=\"o-text-media px-side-spacer sm:px-side-spacer-sm lg:px-side-spacer-tablet 2xl:px-side-spacer-desktop flex flex-wrap items-start md:block\">\n\n    \n        \n                    <div\n                class=\"h-auto mb-6 md:mb-4 lg:mb-8 xl:mb-9 float-left mr-6 md:mr-4 lg:mr-8 xl:mr-9  overflow-hidden shadow-content-image w-full md:w-1\/3\"\n            >\n                \r\n\r\n    \r\n        \r\n            \r\n                \r\n                    <picture\r\n                        class=\"\"\r\n                                            >\r\n                                                                                                        <source\r\n                                media=\"(max-width: 150px)\"\r\n                                width=\"150\"\r\n                                height=\"150\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/07\/CCF-scaled-1-150x150.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                                <source\r\n                                media=\"(max-width: 300px)\"\r\n                                width=\"300\"\r\n                                height=\"225\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/07\/CCF-scaled-1-300x225.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                                <source\r\n                                media=\"(max-width: 768px)\"\r\n                                width=\"768\"\r\n                                height=\"576\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/07\/CCF-scaled-1-768x576.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                                <source\r\n                                media=\"(max-width: 1024px)\"\r\n                                width=\"1024\"\r\n                                height=\"768\"\r\n                                srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/07\/CCF-scaled-1-1024x768.webp\"\r\n                                type=\"image\/webp\"\r\n                            \/>\r\n                                                                            <img\r\n                            class=\"a-image transparent border-image h-auto  w-full\"\r\n                                                        srcset=\"https:\/\/www.gt-engineering.it\/wp-content\/uploads\/2023\/07\/CCF-scaled-1.webp\"\r\n                                                        title=\"CCF-scaled\"\r\n                                                        type=\"image\/webp\"\r\n                        \/>\r\n                    <\/picture>\r\n\r\n                \r\n\r\n                    \r\n    \r\n            <\/div>\n        \n                    <div class=\"relative w-full\">\n                \n<div class=\"a-text font-text text-base normal mt-8 first:mt-0 space-y-4\">\n    <p><strong>La d\u00e9faillance de cause commune (CCF)<\/strong> est d\u00e9finie comme une d\u00e9faillance r\u00e9sultant d&rsquo;un ou de plusieurs \u00e9v\u00e9nements et provoquant des d\u00e9faillances simultan\u00e9es de deux canaux distincts ou plus dans un syst\u00e8me \u00e0 canaux multiples, ce qui entra\u00eene la d\u00e9faillance d&rsquo;une fonction de contr\u00f4le li\u00e9e \u00e0 la s\u00e9curit\u00e9.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>Il existe plusieurs facteurs d&rsquo;influence :<\/p>\n<ul>\n<li>La technologie utilis\u00e9e<\/li>\n<li>L&rsquo;architecture<\/li>\n<li>Le type d&rsquo;application<\/li>\n<li>L&rsquo;environnement dans lequel la machine fonctionne<\/li>\n<\/ul>\n<p>Le taux de CCF repr\u00e9sente la fr\u00e9quence \u00e0 laquelle ces d\u00e9fauts se produisent sur un canal et se calcule comme \u03b2-\u03bbd.<\/p>\n<p>La norme EN 13849 \u00e9tablit que le facteur b\u00eata (\u03b2) doit \u00eatre inf\u00e9rieur \u00e0 2 %. Elle fournit une s\u00e9rie de mesures \u00e0 prendre pour r\u00e9duire \u03b2. Le tableau F.1 \u00e9num\u00e8re les mesures et leurs notes, bas\u00e9es sur un jugement technique, qui repr\u00e9sentent la contribution de chaque mesure \u00e0 la r\u00e9duction des d\u00e9faillances de cause commune. L&rsquo;objectif est d&rsquo;atteindre un score minimum de 65\/100 afin d&rsquo;avoir \u03b2\u22642%.<\/p>\n<\/div>            <\/div>\n        \n        \n                <div class=\"clear-both\"><\/div>\n        \n\n    <\/div>\n        <\/section>\n\n    \n","protected":false},"excerpt":{"rendered":"<p>La d\u00e9faillance de cause commune (CCF) est d\u00e9finie comme une d\u00e9faillance r\u00e9sultant d&rsquo;un ou de plusieurs \u00e9v\u00e9nements et provoquant des d\u00e9faillances simultan\u00e9es de deux canaux distincts ou plus dans un syst\u00e8me \u00e0 canaux multiples, ce qui entra\u00eene la d\u00e9faillance d&rsquo;une fonction de contr\u00f4le li\u00e9e \u00e0 la s\u00e9curit\u00e9.<\/p>\n","protected":false},"author":182,"featured_media":38674,"parent":38606,"menu_order":8,"template":"","meta":{"_acf_changed":false,"footnotes":""},"normative-tecniche":[164],"class_list":["post-38673","normativa_tecnica","type-normativa_tecnica","status-publish","has-post-thumbnail","hentry","tipologia_normativa-normes-en-iso"],"acf":{"sottotitolo":"Mesures \u00e0 prendre pour r\u00e9duire le risque de d\u00e9faillances simultan\u00e9es","allegati":null},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - 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