![\"\"](\"https:\/\/led.amasly.com\/wp-content\/uploads\/2024\/12\/Explosion-proof-lights.jpg\" "\\"Lampes")
<\/a><\/figure><\/div>\n\n\n\nPour les \u00e9quipements de s\u00e9curit\u00e9 intrins\u00e8que, \u00e0 basse temp\u00e9rature, les caract\u00e9ristiques de performance des composants utilis\u00e9s dans les \u00e9quipements de s\u00e9curit\u00e9 intrins\u00e8que, tels que les barri\u00e8res de s\u00e9curit\u00e9, et les alimentations limit\u00e9es par \u00e9tincelles avec des composants dynamiques de s\u00e9curit\u00e9 intrins\u00e8que, changent. Lors de la s\u00e9lection des composants, ces changements doivent \u00eatre pris en compte et l'\u00e9valuation doit \u00eatre effectu\u00e9e conform\u00e9ment aux exigences du \u201cMat\u00e9riel prot\u00e9g\u00e9 de s\u00e9curit\u00e9 intrins\u00e8que \u2018i\u2019\u201d correspondant, en utilisant la temp\u00e9rature de fonctionnement sp\u00e9cifi\u00e9e par le fabricant. Cette valeur nominale doit tenir compte des changements dans le fonctionnement des composants semi-conducteurs qui affectent les performances de s\u00e9curit\u00e9 intrins\u00e8que afin de fournir la fonction de s\u00e9curit\u00e9 intrins\u00e8que requise. <\/p>\n\n\n\n
La performance de s\u00e9curit\u00e9 intrins\u00e8que de l'alimentation avec des composants dynamiques \u00e0 s\u00e9curit\u00e9 intrins\u00e8que utilis\u00e9e dans de tels syst\u00e8mes d\u00e9pend de la temp\u00e9rature ambiante du site d'application. \u00c0 basse temp\u00e9rature, la sensibilit\u00e9 des composants semi-conducteurs dynamiques de l'alimentation \u00e0 s\u00e9curit\u00e9 intrins\u00e8que diminue et le temps de commutation augmente. Les r\u00e9glementations correspondantes stipulent que l'essai d'allumage par \u00e9tincelle doit \u00eatre effectu\u00e9 dans le circuit le plus susceptible de s'enflammer. Toutefois, dans la pratique, les essais sont g\u00e9n\u00e9ralement effectu\u00e9s \u00e0 des temp\u00e9ratures de laboratoire. <\/p>\n\n\n\n
Par cons\u00e9quent, pour les syst\u00e8mes dot\u00e9s d'une alimentation \u00e0 s\u00e9curit\u00e9 intrins\u00e8que de nature dynamique dans des zones \u00e0 basses temp\u00e9ratures, la performance de s\u00e9curit\u00e9 intrins\u00e8que doit \u00eatre test\u00e9e \u00e0 des temp\u00e9ratures comprises dans la plage d'application, y compris la temp\u00e9rature la plus basse des composants semi-conducteurs dynamiques, et \u00e0 la condition que le dispositif de test d'\u00e9tincelles soit connect\u00e9 \u00e0 une charge appropri\u00e9e \u00e0 la temp\u00e9rature de fonctionnement la plus \u00e9lev\u00e9e. Les composants semi-conducteurs assurant une protection de s\u00e9curit\u00e9 intrins\u00e8que \u00e0 une temp\u00e9rature ambiante inf\u00e9rieure \u00e0 -40 \u2103 peuvent n\u00e9cessiter des syst\u00e8mes de chauffage sp\u00e9ciaux. Pour les \u00e9quipements utilis\u00e9s dans des climats marins froids, bien que l'\u00e9quipement soit conforme \u00e0 la ligne de fuite correspondante et \u00e0 l'indice de suivi comparatif (CTI) des mat\u00e9riaux isolants, un niveau de protection sup\u00e9rieur \u00e0 IP54 peut \u00eatre n\u00e9cessaire pour garantir que les d\u00e9p\u00f4ts de chlorure \u00e0 la surface des cartes de circuits imprim\u00e9s ne provoquent pas de suivi.<\/p>","protected":false},"excerpt":{"rendered":"
Ambient temperatures below -20 \u2103 may affect the explosion-proof type of the equipment, and should be taken into account during equipment evaluation and testing. For intrinsically safe equipment, at low temperatures, the performance characteristics of components used in intrinsically safe equipment, such as safety barriers, and the spark-limited power supplies with dynamic intrinsically safe components […]<\/p>\n","protected":false},"author":1,"featured_media":1600,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"disabled","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[7],"tags":[],"class_list":["post-1610","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-light"],"uagb_featured_image_src":{"full":["https:\/\/led.amasly.com\/wp-content\/uploads\/2024\/12\/Explosion-proof-lights.jpg",1008,341,false],"thumbnail":["https:\/\/led.amasly.com\/wp-content\/uploads\/2024\/12\/Explosion-proof-lights-150x150.jpg",150,150,true],"medium":["https:\/\/led.amasly.com\/wp-content\/uploads\/2024\/12\/Explosion-proof-lights-300x101.jpg",300,101,true],"medium_large":["https:\/\/led.amasly.com\/wp-content\/uploads\/2024\/12\/Explosion-proof-lights-768x260.jpg",768,260,true],"large":["https:\/\/led.amasly.com\/wp-content\/uploads\/2024\/12\/Explosion-proof-lights.jpg",1008,341,false],"1536x1536":["https:\/\/led.amasly.com\/wp-content\/uploads\/2024\/12\/Explosion-proof-lights.jpg",1008,341,false],"2048x2048":["https:\/\/led.amasly.com\/wp-content\/uploads\/2024\/12\/Explosion-proof-lights.jpg",1008,341,false],"trp-custom-language-flag":["https:\/\/led.amasly.com\/wp-content\/uploads\/2024\/12\/Explosion-proof-lights.jpg",18,6,false]},"uagb_author_info":{"display_name":"Joe","author_link":"https:\/\/led.amasly.com\/fr\/author\/jacklin\/"},"uagb_comment_info":0,"uagb_excerpt":"Ambient temperatures below -20 \u2103 may affect the explosion-proof type of the equipment, and should be taken into account during equipment evaluation and testing. For intrinsically safe equipment, at low temperatures, the performance characteristics of components used in intrinsically safe equipment, such as safety barriers, and the spark-limited power supplies with dynamic intrinsically safe components\u2026","_links":{"self":[{"href":"https:\/\/led.amasly.com\/fr\/wp-json\/wp\/v2\/posts\/1610","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/led.amasly.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/led.amasly.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/led.amasly.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/led.amasly.com\/fr\/wp-json\/wp\/v2\/comments?post=1610"}],"version-history":[{"count":1,"href":"https:\/\/led.amasly.com\/fr\/wp-json\/wp\/v2\/posts\/1610\/revisions"}],"predecessor-version":[{"id":1611,"href":"https:\/\/led.amasly.com\/fr\/wp-json\/wp\/v2\/posts\/1610\/revisions\/1611"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/led.amasly.com\/fr\/wp-json\/wp\/v2\/media\/1600"}],"wp:attachment":[{"href":"https:\/\/led.amasly.com\/fr\/wp-json\/wp\/v2\/media?parent=1610"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/led.amasly.com\/fr\/wp-json\/wp\/v2\/categories?post=1610"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/led.amasly.com\/fr\/wp-json\/wp\/v2\/tags?post=1610"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}