{"id":7878,"date":"2023-08-17T07:07:06","date_gmt":"2023-08-17T07:07:06","guid":{"rendered":"https:\/\/lhm-instrumentation.eu\/?p=7878"},"modified":"2023-11-21T11:18:28","modified_gmt":"2023-11-21T11:18:28","slug":"diagnostiquer-les-problemes-de-qualite-de-lalimentation-secteur-dans-les-systemes-electriques-anciens","status":"publish","type":"post","link":"https:\/\/lhm-instrumentation.eu\/fr\/kenniscentrum\/energie-power\/problemen-met-de-netvoedingskwaliteit-diagnosticeren-in-oudere-elektrische-systemen\/","title":{"rendered":"Diagnostiquer les probl\u00e8mes de qualit\u00e9 de l'alimentation secteur dans les syst\u00e8mes \u00e9lectriques anciens"},"content":{"rendered":"<div class=\"wpb-content-wrapper\"><div class=\"vc_row wpb_row vc_row-fluid\"><div class=\"wpb_column vc_column_container vc_col-sm-12\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\"><div class=\"vc_row wpb_row vc_inner vc_row-fluid vc_row-o-content-middle vc_row-flex\"><div class=\"wpb_column vc_column_container vc_col-sm-12\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\">\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p><img loading=\"lazy\" decoding=\"async\" class=\"alignright wp-image-7879\" src=\"https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/08\/problemen-netvoeding-300x200.jpg\" alt=\"diagnostiquer la qualit\u00e9 de l&#039;alimentation secteur\" width=\"500\" height=\"334\" srcset=\"https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/08\/problemen-netvoeding-300x200.jpg 300w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/08\/problemen-netvoeding-1024x684.jpg 1024w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/08\/problemen-netvoeding-768x513.jpg 768w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/08\/problemen-netvoeding-370x247.jpg 370w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/08\/problemen-netvoeding-1200x802.jpg 1200w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/08\/problemen-netvoeding-360x241.jpg 360w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/08\/problemen-netvoeding-200x134.jpg 200w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/08\/problemen-netvoeding-400x267.jpg 400w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/08\/problemen-netvoeding-100x67.jpg 100w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/08\/problemen-netvoeding.jpg 1392w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><span style=\"color: #3161a5;\">Le cas des d\u00e9faillances d'appareils m\u00e9dicaux est un exemple classique de l'importance d'une approche syst\u00e9matique du diagnostic de la qualit\u00e9 de l'alimentation secteur. C'est l'histoire de Mike, un entrepreneur ind\u00e9pendant qui travaille avec un certain nombre d'usines de haute technologie.<\/span><\/p>\n<p>&nbsp;<\/p>\n<h4>Le probl\u00e8me<\/h4>\n<p>Mike a rencontr\u00e9 sur place un gestionnaire de b\u00e2timent qui \u00e9tait frustr\u00e9 par son syst\u00e8me \u00e9lectrique. Selon lui, rien de ce qui \u00e9tait \u00e9lectrique ne fonctionnait comme il le fallait dans le b\u00e2timent et personne n'avait \u00e9t\u00e9 en mesure d'identifier comment cela pouvait se produire ou de fournir une solution. L'administrateur a en outre indiqu\u00e9 \u00e0 Mike que trois de ses \u00e9lectriciens avaient d\u00e9missionn\u00e9 et qu'il se trouvait d\u00e9sormais dans une situation d\u00e9licate.<\/p>\n<p>Mike a pos\u00e9 des questions pour obtenir une image plus d\u00e9taill\u00e9e du probl\u00e8me, mais le retour d'information n'a pas donn\u00e9 grand-chose d'utile. Mike aimait suivre la devise \u201dEn cas de doute, regardez o\u00f9 sont les victimes\u201d et a donc demand\u00e9 \u00e0 se rendre dans la partie du b\u00e2timent o\u00f9 les probl\u00e8mes \u00e9taient les plus graves.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n<div class=\"vc_empty_space\"   style=\"height: 32px\"><span class=\"vc_empty_space_inner\"><\/span><\/div>\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p style=\"text-align: center;\"><a class=\"maxbutton-6 maxbutton maxbutton-vraag-advies-aan-onze-experts\" target=\"_blank\" rel=\"noopener\" href=\"https:\/\/lhm-instrumentation.eu\/fr\/contact\/\"><span class='mb-text'>Demandez conseil \u00e0 nos experts<\/span><\/a><\/p>\n\n\t\t<\/div>\n\t<\/div>\n<\/div><\/div><\/div><\/div><div class=\"vc_empty_space\"   style=\"height: 64px\"><span class=\"vc_empty_space_inner\"><\/span><\/div>\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<h4>Conseils visuels<\/h4>\n<p>Dans un coin, une grande machine m\u00e9dicale effectuait une proc\u00e9dure de test critique. La machine \u00e9tait \u00e9quip\u00e9e d'un grand \u00e9cran, d'un clavier et d'un panneau de commande, ainsi que d'un certain nombre de c\u00e2bles et de tuyaux menant \u00e0 d'autres \u00e9quipements. L'\u00e9cran de contr\u00f4le affichait que la proc\u00e9dure de test \u00e9tait \u201den cours\u201d.<\/p>\n<p>\u00c0 c\u00f4t\u00e9 d'une machine se trouve un \u00e9tabli destin\u00e9 \u00e0 la r\u00e9paration de circuits imprim\u00e9s. Sur l'\u00e9tabli se trouvaient un fer \u00e0 souder, une loupe \u00e9clairante et un ventilateur. La prise de courant de l'\u00e9tabli \u00e9tait branch\u00e9e sur la m\u00eame prise que la grande machine m\u00e9dicale. Mike a vu la personne \u00e0 l'\u00e9tabli tendre la main et allumer le ventilateur. \u00c0 ce moment-l\u00e0, l'\u00e9cran de contr\u00f4le de l'appareil m\u00e9dical s'est \u00e9teint pendant un moment, puis s'est rallum\u00e9 avec les mots \u201dProgramme reset\u201d affich\u00e9s en grosses lettres.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n<div class=\"vc_empty_space\"   style=\"height: 64px\"><span class=\"vc_empty_space_inner\"><\/span><\/div>\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<h4><img loading=\"lazy\" decoding=\"async\" class=\"alignright wp-image-7883\" src=\"https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/08\/problemen-netvoeding2-300x146.jpg\" alt=\"\" width=\"500\" height=\"244\" srcset=\"https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/08\/problemen-netvoeding2-300x146.jpg 300w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/08\/problemen-netvoeding2-1024x499.jpg 1024w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/08\/problemen-netvoeding2-768x374.jpg 768w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/08\/problemen-netvoeding2-370x180.jpg 370w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/08\/problemen-netvoeding2-1200x584.jpg 1200w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/08\/problemen-netvoeding2-360x175.jpg 360w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/08\/problemen-netvoeding2-200x97.jpg 200w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/08\/problemen-netvoeding2-400x195.jpg 400w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/08\/problemen-netvoeding2-100x49.jpg 100w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/08\/problemen-netvoeding2.jpg 1464w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/>Mesurer et \u00e9valuer<\/h4>\n<p>Mike a mesur\u00e9 la tension au niveau de la prise qui alimente les deux charges. Il a mesur\u00e9 la tension \u00e0 la prise qui alimente les deux charges. <a href=\"https:\/\/lhm-instrumentation.eu\/fr\/produit\/fluke-80-series-v-digital-multimeters-multimetre-numerique\/\">Fluke 87 V<\/a> Le multim\u00e8tre industriel a mesur\u00e9 115 V. Le gestionnaire du b\u00e2timent a r\u00e9p\u00e9t\u00e9 la mesure avec son <a href=\"https:\/\/lhm-instrumentation.eu\/fr\/produit\/multimetres-industriels-fluke-27-ii28-ii\/\">Fluke 27 II<\/a> Multim\u00e8tre num\u00e9rique robuste, qui affiche 118 V. Pourquoi cette diff\u00e9rence ?<\/p>\n<p>Le Fluke 87 V fournit des mesures True-RMS qui donnent des r\u00e9sultats corrects mais inf\u00e9rieurs \u00e0 ceux des instruments de milieu de gamme, tels que le Fluke 27 II, sur des ondes carr\u00e9es ou des formes d'ondes ressemblant \u00e0 des ondes carr\u00e9es. Mike a ferm\u00e9 son <a href=\"https:\/\/lhm-instrumentation.eu\/fr\/produit\/oscilloscope-industriel-fluke-serie-120b\/\">Fluke 120B<\/a> Le ScopeMeter industriel s'est allum\u00e9 et a affich\u00e9 la forme d'onde de la tension. L'affichage montre que la forme d'onde est fortement tronqu\u00e9e en haut, ce qui la fait ressembler davantage \u00e0 une onde carr\u00e9e qu'\u00e0 une onde sinuso\u00efdale. La valeur de cr\u00eate ne mesurait que 135 V, au lieu des 162 V attendus.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n<div class=\"vc_empty_space\"   style=\"height: 64px\"><span class=\"vc_empty_space_inner\"><\/span><\/div>\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p>Mike a dessin\u00e9 un sch\u00e9ma unifilaire du syst\u00e8me. Ce sch\u00e9ma montre que le transformateur qui alimente la zone de test se trouve de l'autre c\u00f4t\u00e9 du b\u00e2timent, \u00e0 environ 150 m\u00e8tres. La plupart des charges de ce transformateur n'\u00e9taient pas lin\u00e9aires et atteignaient des courants de pointe \u00e9lev\u00e9s au moment o\u00f9 la tension atteignait son maximum. La combinaison de courants de pointe \u00e9lev\u00e9s et d'une forte imp\u00e9dance due \u00e0 la longue distance a provoqu\u00e9 de fortes chutes de tension \u00e0 l'extr\u00e9mit\u00e9 du circuit, \u00e0 l'endroit m\u00eame o\u00f9 se trouvait la zone d'essai.<br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"wp-image-7885 size-medium aligncenter\" src=\"https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/08\/problemen-netvoeding3-264x300.jpg\" alt=\"\" width=\"264\" height=\"300\" srcset=\"https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/08\/problemen-netvoeding3-264x300.jpg 264w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/08\/problemen-netvoeding3-768x872.jpg 768w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/08\/problemen-netvoeding3-317x360.jpg 317w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/08\/problemen-netvoeding3-360x409.jpg 360w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/08\/problemen-netvoeding3-176x200.jpg 176w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/08\/problemen-netvoeding3-352x400.jpg 352w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/08\/problemen-netvoeding3-88x100.jpg 88w, https:\/\/lhm-instrumentation.eu\/wp-content\/uploads\/2023\/08\/problemen-netvoeding3.jpg 815w\" sizes=\"auto, (max-width: 264px) 100vw, 264px\" \/><\/p>\n\n\t\t<\/div>\n\t<\/div>\n<div class=\"vc_empty_space\"   style=\"height: 64px\"><span class=\"vc_empty_space_inner\"><\/span><\/div>\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<h4>Th\u00e9orie et analyse<\/h4>\n<p>\u00c9tant donn\u00e9 que les circuits internes de la machine m\u00e9dicale fonctionnaient sur une faible tension continue, l'alimentation interne devait avoir un circuit d'entr\u00e9e diode\/condensateur qui n\u00e9cessitait une tension de cr\u00eate minimale pour fonctionner correctement. La plaque signal\u00e9tique de la machine m\u00e9dicale indiquait que la machine n\u00e9cessitait une tension d'alimentation comprise entre 100 et 135 V rms AC. Les ing\u00e9nieurs qui ont con\u00e7u la machine et sp\u00e9cifi\u00e9 la plaque signal\u00e9tique ont suppos\u00e9 que la tension d'alimentation serait une onde sinuso\u00efdale, de sorte que la tension de cr\u00eate minimale serait de 141 V cr\u00eate (100 x 1,41). La valeur mesur\u00e9e de la tension de cr\u00eate n'\u00e9tant que de 135 V, la machine fonctionnait \u00e0 une tension de cr\u00eate d\u00e9j\u00e0 inf\u00e9rieure de 6 V au minimum absolu requis. Lorsque le ventilateur a \u00e9t\u00e9 mis en marche, le courant de cr\u00eate aliment\u00e9 par le moteur du ventilateur a r\u00e9duit la tension \u00e0 un point tel que l'alimentation \u00e9lectrique de la machine n'\u00e9tait plus normale. La machine s'est alors r\u00e9initialis\u00e9e.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n<div class=\"vc_empty_space\"   style=\"height: 64px\"><span class=\"vc_empty_space_inner\"><\/span><\/div>\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<h4>Solution<\/h4>\n<p>Le probl\u00e8me de l'\u00e9cr\u00eatage des pointes de tension (flat topping) est courant dans les b\u00e2timents de haute technologie. De nombreux b\u00e2timents utilis\u00e9s aujourd'hui n'ont pas \u00e9t\u00e9 con\u00e7us pour faire face \u00e0 l'\u00e9norme quantit\u00e9 de charges informatiques et non lin\u00e9aires qui sont si courantes aujourd'hui.<\/p>\n<p>Dans ce cas, il serait n\u00e9cessaire de tout rec\u00e2bler en profondeur pour r\u00e9duire la chute de tension entre le transformateur et la charge. Une autre solution consisterait \u00e0 placer les charges les plus sensibles plus pr\u00e8s du transformateur.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n<div class=\"vc_empty_space\"   style=\"height: 32px\"><span class=\"vc_empty_space_inner\"><\/span><\/div>\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<p style=\"text-align: center;\"><a class=\"maxbutton-5 maxbutton maxbutton-informatie-aanvragen\" target=\"_blank\" rel=\"noopener\" href=\"https:\/\/lhm-instrumentation.eu\/fr\/contact\/\"><span class='mb-text'>Demande d'informations<\/span><\/a><\/p>\n\n\t\t<\/div>\n\t<\/div>\n<div class=\"vc_empty_space\"   style=\"height: 100px\"><span class=\"vc_empty_space_inner\"><\/span><\/div><\/div><\/div><\/div><\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"Het geval van storingen aan het medische apparaat is een klassiek voorbeeld van het belang van een systematische aanpak voor het oplossen van problemen met de netvoedingskwaliteit diagnosticeren. Dit is het verhaal van Mike, een zelfstandig aannemer die met een...","protected":false},"author":9,"featured_media":7879,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[281,279],"tags":[],"class_list":["post-7878","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-energie-power","category-kenniscentrum"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>netvoedingskwaliteit diagnosticeren in oudere elektrische systemen<\/title>\n<meta name=\"description\" content=\"Leer netvoedingskwaliteit effectief diagnosticeren met onze deskundige gids. 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