{"id":2143,"date":"2026-03-05T06:21:45","date_gmt":"2026-03-05T06:21:45","guid":{"rendered":"https:\/\/yawei-powertransformer.com\/?p=2143"},"modified":"2026-03-24T06:47:18","modified_gmt":"2026-03-24T06:47:18","slug":"500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems","status":"publish","type":"post","link":"https:\/\/yawei-powertransformer.com\/fr\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/","title":{"rendered":"500 kVA Transformer Unifilar Diagram Explained for United States Electrical Systems (en anglais)"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_79_2 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table des mati\u00e8res<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/yawei-powertransformer.com\/fr\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#Introduction\" >Introduction<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/yawei-powertransformer.com\/fr\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#What_Is_a_Unifilar_Diagram_in_Power_System_Engineering\" >Qu'est-ce qu'un diagramme unifilaire dans l'ing\u00e9nierie des r\u00e9seaux \u00e9lectriques ?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/yawei-powertransformer.com\/fr\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#Primary_Voltage_Medium_Voltage\" >Tension primaire (moyenne tension)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/yawei-powertransformer.com\/fr\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#Secondary_Voltage_Low_Voltage\" >Tension secondaire (basse tension)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/yawei-powertransformer.com\/fr\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#Typical_Connection_Type_for_a_500_kVA_Transformer\" >Type de connexion typique pour un transformateur de 500 kVA<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/yawei-powertransformer.com\/fr\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#Advantages_of_Delta%E2%80%93Wye_Configuration\" >Avantages de la configuration Delta-Wye<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/yawei-powertransformer.com\/fr\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#Main_Components_in_a_500_kVA_Transformer_Unifilar_Diagram\" >Principaux composants d'un transformateur de 500 kVA Diagramme Unifilar<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/yawei-powertransformer.com\/fr\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#1_Medium_Voltage_Utility_Supply\" >1. Alimentation \u00e9lectrique moyenne tension<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/yawei-powertransformer.com\/fr\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#2_High_Voltage_Disconnect_Switch\" >2. Interrupteur de d\u00e9connexion haute tension<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/yawei-powertransformer.com\/fr\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#3_Surge_Arresters\" >3. Parafoudres<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/yawei-powertransformer.com\/fr\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#4_High_Voltage_Protection\" >4. Protection contre la haute tension<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/yawei-powertransformer.com\/fr\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#5_500_kVA_Transformer\" >5. Transformateur de 500 kVA<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/yawei-powertransformer.com\/fr\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#6_Grounding_System\" >6. Syst\u00e8me de mise \u00e0 la terre<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/yawei-powertransformer.com\/fr\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#7_Low_Voltage_Distribution_Panel\" >7. Panneau de distribution basse tension<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/yawei-powertransformer.com\/fr\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#Where_500_kVA_Transformers_Are_Commonly_Used\" >O\u00f9 les transformateurs de 500 kVA sont couramment utilis\u00e9s<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/yawei-powertransformer.com\/fr\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#Commercial_Buildings\" >B\u00e2timents commerciaux<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/yawei-powertransformer.com\/fr\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#Industrial_Facilities\" >Installations industrielles<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/yawei-powertransformer.com\/fr\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#Infrastructure_Projects\" >Projets d'infrastructure<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/yawei-powertransformer.com\/fr\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#Design_Standards_for_Transformers_Used_in_the_United_States\" >Normes de conception pour les transformateurs utilis\u00e9s aux \u00c9tats-Unis<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/yawei-powertransformer.com\/fr\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#Major_Standards\" >Principales normes<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/yawei-powertransformer.com\/fr\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#500_kVA_Distribution_Transformers_from_Yawei_Transformer\" >Transformateurs de distribution de 500 kVA de Yawei Transformer<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/yawei-powertransformer.com\/fr\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#Frequently_Asked_Questions_FAQ\" >Foire aux questions (FAQ)<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/yawei-powertransformer.com\/fr\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#What_is_a_transformer_unifilar_diagram\" >Qu'est-ce qu'un diagramme unifilaire de transformateur ?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/yawei-powertransformer.com\/fr\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#What_voltage_is_typical_for_a_500_kVA_transformer_in_the_United_States\" >Quelle est la tension typique d'un transformateur de 500 kVA aux \u00c9tats-Unis ?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/yawei-powertransformer.com\/fr\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#What_does_Delta%E2%80%93Wye_mean_in_a_transformer\" >Que signifie Delta-Wye dans un transformateur ?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/yawei-powertransformer.com\/fr\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#Is_500_kVA_a_common_transformer_size\" >Est-ce que 500 kVA est une taille de transformateur courante ?<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 data-start=\"862\" data-end=\"876\"><span class=\"ez-toc-section\" id=\"Introduction\"><\/span>Introduction<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"878\" data-end=\"1067\">Dans la conception de la distribution \u00e9lectrique, les ing\u00e9nieurs utilisent fr\u00e9quemment un sch\u00e9ma unifilaire (\u00e9galement appel\u00e9 sch\u00e9ma unifilaire) pour repr\u00e9senter la mani\u00e8re dont les \u00e9quipements sont connect\u00e9s au sein d'un syst\u00e8me \u00e9lectrique.<\/p>\n<p data-start=\"1069\" data-end=\"1349\">Pour les installations qui n\u00e9cessitent un transformateur de distribution de 500 kVA, le sch\u00e9ma unifilaire fournit une vue d'ensemble simplifi\u00e9e du r\u00e9seau \u00e9lectrique, y compris l'alimentation moyenne tension, les connexions du transformateur, les dispositifs de protection, le syst\u00e8me de mise \u00e0 la terre et la distribution basse tension.<\/p>\n<p data-start=\"1351\" data-end=\"1578\">Aux \u00c9tats-Unis, les installations de transformateurs respectent g\u00e9n\u00e9ralement les normes d'efficacit\u00e9 ANSI, IEEE et DOE, et les configurations de tension typiques comprennent une tension primaire de 13,2 kV \/ 12,47 kV et une tension secondaire de 480Y\/277V.<\/p>\n<p data-start=\"1580\" data-end=\"1758\">Ce guide explique la structure d'un diagramme unifilaire de transformateur de 500 kVA, les composants qu'il comprend et la fa\u00e7on dont il est utilis\u00e9 dans des syst\u00e8mes d'alimentation commerciaux et industriels r\u00e9els.<\/p>\n<h2 data-start=\"1770\" data-end=\"1824\"><span class=\"ez-toc-section\" id=\"What_Is_a_Unifilar_Diagram_in_Power_System_Engineering\"><\/span>Qu'est-ce qu'un diagramme unifilaire dans l'ing\u00e9nierie des r\u00e9seaux \u00e9lectriques ?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"1826\" data-end=\"1969\">Un sch\u00e9ma unifilaire est une repr\u00e9sentation simplifi\u00e9e d'un syst\u00e8me \u00e9lectrique qui utilise une ligne pour repr\u00e9senter les conducteurs triphas\u00e9s.<\/p>\n<p data-start=\"1971\" data-end=\"2082\">Au lieu de dessiner chaque phase individuelle, le diagramme montre les relations fonctionnelles entre les \u00e9quipements.<\/p>\n<p data-start=\"2084\" data-end=\"2120\"><strong>Les ing\u00e9nieurs utilisent les diagrammes unifilaires pour :<\/strong><\/p>\n<ul data-start=\"2122\" data-end=\"2261\">\n<li data-start=\"2122\" data-end=\"2152\">\n<p data-start=\"2124\" data-end=\"2152\">Planification du syst\u00e8me \u00e9lectrique<\/p>\n<\/li>\n<li data-start=\"2153\" data-end=\"2174\">\n<p data-start=\"2155\" data-end=\"2174\">Conception de la sous-station<\/p>\n<\/li>\n<li data-start=\"2175\" data-end=\"2203\">\n<p data-start=\"2177\" data-end=\"2203\">Installation du transformateur<\/p>\n<\/li>\n<li data-start=\"2204\" data-end=\"2231\">\n<p data-start=\"2206\" data-end=\"2231\">Coordination de la protection<\/p>\n<\/li>\n<li data-start=\"2232\" data-end=\"2261\">\n<p data-start=\"2234\" data-end=\"2261\">Documentation sur la maintenance<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"2263\" data-end=\"2334\"><strong>Pour les installations de transformateurs, un sch\u00e9ma unifilaire illustre normalement :<\/strong><\/p>\n<ul data-start=\"2336\" data-end=\"2540\">\n<li data-start=\"2336\" data-end=\"2363\">\n<p data-start=\"2338\" data-end=\"2363\">Alimentation des services publics<\/p>\n<\/li>\n<li data-start=\"2364\" data-end=\"2402\">\n<p data-start=\"2366\" data-end=\"2402\">Mat\u00e9riel de commutation moyenne tension<\/p>\n<\/li>\n<li data-start=\"2403\" data-end=\"2447\">\n<p data-start=\"2405\" data-end=\"2447\">Capacit\u00e9 du transformateur et type de connexion<\/p>\n<\/li>\n<li data-start=\"2448\" data-end=\"2476\">\n<p data-start=\"2450\" data-end=\"2476\">Dispositifs de protection contre les surtensions<\/p>\n<\/li>\n<li data-start=\"2477\" data-end=\"2504\">\n<p data-start=\"2479\" data-end=\"2504\">Configuration de la mise \u00e0 la terre<\/p>\n<\/li>\n<li data-start=\"2505\" data-end=\"2540\">\n<p data-start=\"2507\" data-end=\"2540\">Panneaux de distribution basse tension<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"2542\" data-end=\"2666\">En raison de sa simplicit\u00e9, le diagramme unifilaire est l'un des documents les plus importants dans la conception de l'ing\u00e9nierie \u00e9lectrique.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-2148\" src=\"https:\/\/yawei-powertransformer.com\/wp-content\/uploads\/2026\/03\/unifilar-diagram-transformer-500-kVA-United-States.webp\" alt=\"Sch\u00e9ma unifilaire d&#039;un transformateur de 500 kVA pour la distribution d&#039;\u00e9lectricit\u00e9 aux \u00c9tats-Unis, montrant les connexions moyenne et basse tension, produit par un fabricant et fournisseur chinois de transformateurs pour des projets industriels, commerciaux et de services publics.\" width=\"900\" height=\"600\" srcset=\"https:\/\/yawei-powertransformer.com\/wp-content\/uploads\/2026\/03\/unifilar-diagram-transformer-500-kVA-United-States.webp 900w, https:\/\/yawei-powertransformer.com\/wp-content\/uploads\/2026\/03\/unifilar-diagram-transformer-500-kVA-United-States-300x200.webp 300w, https:\/\/yawei-powertransformer.com\/wp-content\/uploads\/2026\/03\/unifilar-diagram-transformer-500-kVA-United-States-768x512.webp 768w, https:\/\/yawei-powertransformer.com\/wp-content\/uploads\/2026\/03\/unifilar-diagram-transformer-500-kVA-United-States-18x12.webp 18w, https:\/\/yawei-powertransformer.com\/wp-content\/uploads\/2026\/03\/unifilar-diagram-transformer-500-kVA-United-States-600x400.webp 600w\" sizes=\"auto, (max-width: 900px) 100vw, 900px\" \/><\/p>\n<div class=\"row\"  id=\"row-197622837\">\n\n\t<div id=\"col-2019143957\" class=\"col small-12 large-12\"  >\n\t\t\t\t<div class=\"col-inner\"  >\n\t\t\t\n\t\t\t\n<p data-start=\"2678\" data-end=\"2754\">Configuration de tension typique pour un transformateur de 500 kVA aux \u00c9tats-Unis<\/p>\n<p data-start=\"2756\" data-end=\"2928\">Dans les r\u00e9seaux de distribution nord-am\u00e9ricains, une <a href=\"https:\/\/yawei-powertransformer.com\/fr\/manufacturer\/500-kva-pad-mounted-distribution-transformer-12470grdy-7200v-primary-480y-277v-secondary-ansi-ieee-compliant-outdoor-rated\/\"><strong data-start=\"2799\" data-end=\"2822\">Transformateur sur socle de 500 kVA<\/strong><\/a> est couramment utilis\u00e9 pour r\u00e9duire la <strong data-start=\"2853\" data-end=\"2927\">moyenne tension \u00e0 partir d'une ligne d'alimentation en basse tension pour les charges des b\u00e2timents<\/strong>.<\/p>\n<h2 data-start=\"2930\" data-end=\"2965\"><span class=\"ez-toc-section\" id=\"Primary_Voltage_Medium_Voltage\"><\/span>Tension primaire (moyenne tension)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"2967\" data-end=\"2999\">Les tensions primaires courantes sont les suivantes<\/p>\n<ul data-start=\"3001\" data-end=\"3057\">\n<li data-start=\"3001\" data-end=\"3015\">\n<p data-start=\"3003\" data-end=\"3015\"><strong data-start=\"3003\" data-end=\"3015\">12,47 kV<\/strong><\/p>\n<\/li>\n<li data-start=\"3016\" data-end=\"3029\">\n<p data-start=\"3018\" data-end=\"3029\"><strong data-start=\"3018\" data-end=\"3029\">13,2 kV<\/strong><\/p>\n<\/li>\n<li data-start=\"3030\" data-end=\"3043\">\n<p data-start=\"3032\" data-end=\"3043\"><strong data-start=\"3032\" data-end=\"3043\">13,8 kV<\/strong><\/p>\n<\/li>\n<li data-start=\"3044\" data-end=\"3057\">\n<p data-start=\"3046\" data-end=\"3057\"><strong data-start=\"3046\" data-end=\"3057\">34,5 kV<\/strong><\/p>\n<\/li>\n<\/ul>\n<p data-start=\"3059\" data-end=\"3147\">Ces tensions proviennent g\u00e9n\u00e9ralement d'un <strong data-start=\"3096\" data-end=\"3146\">ligne de distribution des services publics ou ligne d'alimentation des sous-stations<\/strong>.<\/p>\n<h2 data-start=\"3149\" data-end=\"3183\"><span class=\"ez-toc-section\" id=\"Secondary_Voltage_Low_Voltage\"><\/span>Tension secondaire (basse tension)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"3185\" data-end=\"3228\">La configuration secondaire la plus courante est la suivante :<\/p>\n<p data-start=\"3230\" data-end=\"3270\"><strong data-start=\"3230\" data-end=\"3270\">480Y \/ 277 V, triphas\u00e9, quatre fils<\/strong><\/p>\n<p data-start=\"3272\" data-end=\"3291\">Ce syst\u00e8me permet :<\/p>\n<ul data-start=\"3293\" data-end=\"3405\">\n<li data-start=\"3293\" data-end=\"3359\">\n<p data-start=\"3295\" data-end=\"3359\"><strong data-start=\"3295\" data-end=\"3304\">480 V<\/strong> pour les moteurs, les \u00e9quipements HVAC et les machines industrielles<\/p>\n<\/li>\n<li data-start=\"3360\" data-end=\"3405\">\n<p data-start=\"3362\" data-end=\"3405\"><strong data-start=\"3362\" data-end=\"3371\">277 V<\/strong> pour les syst\u00e8mes d'\u00e9clairage commerciaux<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"3407\" data-end=\"3449\">Les autres tensions secondaires possibles sont les suivantes<\/p>\n<ul data-start=\"3451\" data-end=\"3511\">\n<li data-start=\"3451\" data-end=\"3467\">\n<p data-start=\"3453\" data-end=\"3467\">208Y \/ 120 V<\/p>\n<\/li>\n<li data-start=\"3468\" data-end=\"3477\">\n<p data-start=\"3470\" data-end=\"3477\">240 V<\/p>\n<\/li>\n<li data-start=\"3478\" data-end=\"3511\">\n<p data-start=\"3480\" data-end=\"3511\">600 V (moins courant aux \u00c9tats-Unis)<\/p>\n<\/li>\n<\/ul>\n<div class=\"row\"  id=\"row-370356535\">\n\n\t<div id=\"col-1970553976\" class=\"col medium-4 small-12 large-4\"  >\n\t\t\t\t<div class=\"col-inner\"  >\n\t\t\t\n\t\t\t\n\t<div class=\"img has-hover x md-x lg-x y md-y lg-y\" id=\"image_409168848\">\n\t\t\t\t\t\t\t\t<div class=\"img-inner dark\" >\n\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"800\" src=\"https:\/\/yawei-powertransformer.com\/wp-content\/uploads\/2026\/03\/500-kVA-Pad-Mounted-Transformer-Supplier-for-United-States-Power-Distribution-Systems.webp\" class=\"attachment-large size-large\" alt=\"Transformateur sur socle de 500 kVA fabriqu\u00e9 par l&#039;usine chinoise de transformateurs pour les syst\u00e8mes de distribution d&#039;\u00e9nergie des \u00c9tats-Unis, fournisseur de transformateurs de distribution souterrains triphas\u00e9s conformes \u00e0 la norme ANSI.\" srcset=\"https:\/\/yawei-powertransformer.com\/wp-content\/uploads\/2026\/03\/500-kVA-Pad-Mounted-Transformer-Supplier-for-United-States-Power-Distribution-Systems.webp 800w, https:\/\/yawei-powertransformer.com\/wp-content\/uploads\/2026\/03\/500-kVA-Pad-Mounted-Transformer-Supplier-for-United-States-Power-Distribution-Systems-300x300.webp 300w, https:\/\/yawei-powertransformer.com\/wp-content\/uploads\/2026\/03\/500-kVA-Pad-Mounted-Transformer-Supplier-for-United-States-Power-Distribution-Systems-150x150.webp 150w, https:\/\/yawei-powertransformer.com\/wp-content\/uploads\/2026\/03\/500-kVA-Pad-Mounted-Transformer-Supplier-for-United-States-Power-Distribution-Systems-768x768.webp 768w, https:\/\/yawei-powertransformer.com\/wp-content\/uploads\/2026\/03\/500-kVA-Pad-Mounted-Transformer-Supplier-for-United-States-Power-Distribution-Systems-12x12.webp 12w, https:\/\/yawei-powertransformer.com\/wp-content\/uploads\/2026\/03\/500-kVA-Pad-Mounted-Transformer-Supplier-for-United-States-Power-Distribution-Systems-600x600.webp 600w, https:\/\/yawei-powertransformer.com\/wp-content\/uploads\/2026\/03\/500-kVA-Pad-Mounted-Transformer-Supplier-for-United-States-Power-Distribution-Systems-100x100.webp 100w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\n<style>\n#image_409168848 {\n  width: 100%;\n}\n<\/style>\n\t<\/div>\n\t\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\n\t\n\n\t<div id=\"col-134135875\" class=\"col medium-4 small-12 large-4\"  >\n\t\t\t\t<div class=\"col-inner\"  >\n\t\t\t\n\t\t\t\n\t<div class=\"img has-hover x md-x lg-x y md-y lg-y\" id=\"image_1293238194\">\n\t\t\t\t\t\t\t\t<div class=\"img-inner dark\" >\n\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"800\" src=\"https:\/\/yawei-powertransformer.com\/wp-content\/uploads\/2026\/03\/500-kVA-Dry-Type-Transformer-Manufacturer-China-Industrial-Power-Transformer-Supplier.webp\" class=\"attachment-large size-large\" alt=\"Transformateur sec de 500 kVA fabriqu\u00e9 par une usine chinoise de transformateurs pour les syst\u00e8mes de distribution d&#039;\u00e9nergie industrielle, fournisseur de transformateurs \u00e9lectriques triphas\u00e9s pour les projets commerciaux et utilitaires.\" srcset=\"https:\/\/yawei-powertransformer.com\/wp-content\/uploads\/2026\/03\/500-kVA-Dry-Type-Transformer-Manufacturer-China-Industrial-Power-Transformer-Supplier.webp 800w, https:\/\/yawei-powertransformer.com\/wp-content\/uploads\/2026\/03\/500-kVA-Dry-Type-Transformer-Manufacturer-China-Industrial-Power-Transformer-Supplier-300x300.webp 300w, https:\/\/yawei-powertransformer.com\/wp-content\/uploads\/2026\/03\/500-kVA-Dry-Type-Transformer-Manufacturer-China-Industrial-Power-Transformer-Supplier-150x150.webp 150w, https:\/\/yawei-powertransformer.com\/wp-content\/uploads\/2026\/03\/500-kVA-Dry-Type-Transformer-Manufacturer-China-Industrial-Power-Transformer-Supplier-768x768.webp 768w, https:\/\/yawei-powertransformer.com\/wp-content\/uploads\/2026\/03\/500-kVA-Dry-Type-Transformer-Manufacturer-China-Industrial-Power-Transformer-Supplier-12x12.webp 12w, https:\/\/yawei-powertransformer.com\/wp-content\/uploads\/2026\/03\/500-kVA-Dry-Type-Transformer-Manufacturer-China-Industrial-Power-Transformer-Supplier-600x600.webp 600w, https:\/\/yawei-powertransformer.com\/wp-content\/uploads\/2026\/03\/500-kVA-Dry-Type-Transformer-Manufacturer-China-Industrial-Power-Transformer-Supplier-100x100.webp 100w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\n<style>\n#image_1293238194 {\n  width: 100%;\n}\n<\/style>\n\t<\/div>\n\t\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\n\t\n\n\t<div id=\"col-369108301\" class=\"col medium-4 small-12 large-4\"  >\n\t\t\t\t<div class=\"col-inner\"  >\n\t\t\t\n\t\t\t\n\t<div class=\"img has-hover x md-x lg-x y md-y lg-y\" id=\"image_1299491612\">\n\t\t\t\t\t\t\t\t<div class=\"img-inner dark\" >\n\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"800\" src=\"https:\/\/yawei-powertransformer.com\/wp-content\/uploads\/2026\/03\/500-kVA-Three-Phase-Oil-Immersed-Transformer-Manufacturer-China-Power-Transformer-Factory.webp\" class=\"attachment-large size-large\" alt=\"Transformateur triphas\u00e9 immerg\u00e9 dans l&#039;huile de 500 kVA fabriqu\u00e9 par l&#039;usine chinoise de transformateurs d&#039;\u00e9nergie, fournisseur de transformateurs d&#039;\u00e9nergie industriels et utilitaires pour les projets commerciaux et d&#039;infrastructure.\" srcset=\"https:\/\/yawei-powertransformer.com\/wp-content\/uploads\/2026\/03\/500-kVA-Three-Phase-Oil-Immersed-Transformer-Manufacturer-China-Power-Transformer-Factory.webp 800w, https:\/\/yawei-powertransformer.com\/wp-content\/uploads\/2026\/03\/500-kVA-Three-Phase-Oil-Immersed-Transformer-Manufacturer-China-Power-Transformer-Factory-300x300.webp 300w, https:\/\/yawei-powertransformer.com\/wp-content\/uploads\/2026\/03\/500-kVA-Three-Phase-Oil-Immersed-Transformer-Manufacturer-China-Power-Transformer-Factory-150x150.webp 150w, https:\/\/yawei-powertransformer.com\/wp-content\/uploads\/2026\/03\/500-kVA-Three-Phase-Oil-Immersed-Transformer-Manufacturer-China-Power-Transformer-Factory-768x768.webp 768w, https:\/\/yawei-powertransformer.com\/wp-content\/uploads\/2026\/03\/500-kVA-Three-Phase-Oil-Immersed-Transformer-Manufacturer-China-Power-Transformer-Factory-12x12.webp 12w, https:\/\/yawei-powertransformer.com\/wp-content\/uploads\/2026\/03\/500-kVA-Three-Phase-Oil-Immersed-Transformer-Manufacturer-China-Power-Transformer-Factory-600x600.webp 600w, https:\/\/yawei-powertransformer.com\/wp-content\/uploads\/2026\/03\/500-kVA-Three-Phase-Oil-Immersed-Transformer-Manufacturer-China-Power-Transformer-Factory-100x100.webp 100w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\n<style>\n#image_1299491612 {\n  width: 100%;\n}\n<\/style>\n\t<\/div>\n\t\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\n\t\n<\/div>\n<h2 data-start=\"3523\" data-end=\"3572\"><span class=\"ez-toc-section\" id=\"Typical_Connection_Type_for_a_500_kVA_Transformer\"><\/span>Type de connexion typique pour un transformateur de 500 kVA<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"3574\" data-end=\"3671\">La plupart des transformateurs de distribution utilis\u00e9s dans les b\u00e2timents commerciaux utilisent un <strong data-start=\"3640\" data-end=\"3670\">Connexion Delta-Wye (\u0394-Y)<\/strong>.<\/p>\n<h3 data-start=\"3673\" data-end=\"3714\"><span class=\"ez-toc-section\" id=\"Advantages_of_Delta%E2%80%93Wye_Configuration\"><\/span>Avantages de la configuration Delta-Wye<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ol data-start=\"3716\" data-end=\"3897\">\n<li data-start=\"3716\" data-end=\"3770\">\n<p data-start=\"3719\" data-end=\"3770\">Fournit un <strong data-start=\"3730\" data-end=\"3754\">point neutre stable<\/strong> pour la mise \u00e0 la terre<\/p>\n<\/li>\n<li data-start=\"3771\" data-end=\"3823\">\n<p data-start=\"3774\" data-end=\"3823\">Soutien <strong data-start=\"3783\" data-end=\"3821\">charges triphas\u00e9es et monophas\u00e9es<\/strong><\/p>\n<\/li>\n<li data-start=\"3824\" data-end=\"3864\">\n<p data-start=\"3827\" data-end=\"3864\">R\u00e9duit l'impact des <strong data-start=\"3849\" data-end=\"3862\">harmoniques<\/strong><\/p>\n<\/li>\n<li data-start=\"3865\" data-end=\"3897\">\n<p data-start=\"3868\" data-end=\"3897\">Am\u00e9liore la fiabilit\u00e9 du syst\u00e8me<\/p>\n<\/li>\n<\/ol>\n<p data-start=\"3899\" data-end=\"4021\">Le point neutre mis \u00e0 la terre (X0) permet une distribution s\u00fbre de l'\u00e9lectricit\u00e9. <strong data-start=\"3959\" data-end=\"3983\">Charges d'\u00e9clairage 277 V<\/strong> et assure une protection ad\u00e9quate contre les d\u00e9fauts.<\/p>\n<h2 data-start=\"4033\" data-end=\"4090\"><span class=\"ez-toc-section\" id=\"Main_Components_in_a_500_kVA_Transformer_Unifilar_Diagram\"><\/span>Principaux composants d'un transformateur de 500 kVA Diagramme Unifilar<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"4092\" data-end=\"4199\">Un sch\u00e9ma unifilaire typique pour un <strong data-start=\"4128\" data-end=\"4164\">Installation d'un transformateur de 500 kVA<\/strong> comprend les \u00e9l\u00e9ments suivants.<\/p>\n<h3 data-start=\"4201\" data-end=\"4236\"><span class=\"ez-toc-section\" id=\"1_Medium_Voltage_Utility_Supply\"><\/span>1. Alimentation \u00e9lectrique moyenne tension<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"4238\" data-end=\"4327\">Le syst\u00e8me \u00e9lectrique commence par un <strong data-start=\"4269\" data-end=\"4287\">alimentateur utilitaire<\/strong>, g\u00e9n\u00e9ralement entre <strong data-start=\"4307\" data-end=\"4326\">12 kV et 35 kV<\/strong>.<\/p>\n<h3 data-start=\"4329\" data-end=\"4365\"><span class=\"ez-toc-section\" id=\"2_High_Voltage_Disconnect_Switch\"><\/span>2. Interrupteur de d\u00e9connexion haute tension<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"4367\" data-end=\"4465\">Ce dispositif permet aux op\u00e9rateurs de <strong data-start=\"4399\" data-end=\"4464\">isoler le transformateur pour la maintenance ou l'arr\u00eat d'urgence<\/strong>.<\/p>\n<h3 data-start=\"4467\" data-end=\"4488\"><span class=\"ez-toc-section\" id=\"3_Surge_Arresters\"><\/span>3. Parafoudres<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"4490\" data-end=\"4535\">Les parafoudres prot\u00e8gent le transformateur contre<\/p>\n<ul data-start=\"4537\" data-end=\"4603\">\n<li data-start=\"4537\" data-end=\"4558\">\n<p data-start=\"4539\" data-end=\"4558\">Foudroiement<\/p>\n<\/li>\n<li data-start=\"4559\" data-end=\"4579\">\n<p data-start=\"4561\" data-end=\"4579\">Surtensions de commutation<\/p>\n<\/li>\n<li data-start=\"4580\" data-end=\"4603\">\n<p data-start=\"4582\" data-end=\"4603\">Surtension transitoire<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"4605\" data-end=\"4634\"><span class=\"ez-toc-section\" id=\"4_High_Voltage_Protection\"><\/span>4. Protection contre la haute tension<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"4636\" data-end=\"4667\">Les dispositifs de protection peuvent comprendre<\/p>\n<ul data-start=\"4669\" data-end=\"4739\">\n<li data-start=\"4669\" data-end=\"4695\">\n<p data-start=\"4671\" data-end=\"4695\">Fusibles limiteurs de courant<\/p>\n<\/li>\n<li data-start=\"4696\" data-end=\"4719\">\n<p data-start=\"4698\" data-end=\"4719\">Interrupteurs de rupture de charge<\/p>\n<\/li>\n<li data-start=\"4720\" data-end=\"4739\">\n<p data-start=\"4722\" data-end=\"4739\">Relais de protection<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"4741\" data-end=\"4766\"><span class=\"ez-toc-section\" id=\"5_500_kVA_Transformer\"><\/span>5. Transformateur de 500 kVA<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"4768\" data-end=\"4790\">Sp\u00e9cification typique :<\/p>\n<ul data-start=\"4792\" data-end=\"4933\">\n<li data-start=\"4792\" data-end=\"4815\">\n<p data-start=\"4794\" data-end=\"4815\">Capacit\u00e9 : <strong data-start=\"4804\" data-end=\"4815\">500 kVA<\/strong><\/p>\n<\/li>\n<li data-start=\"4816\" data-end=\"4846\">\n<p data-start=\"4818\" data-end=\"4846\">Tension primaire : <strong data-start=\"4835\" data-end=\"4846\">13,2 kV<\/strong><\/p>\n<\/li>\n<li data-start=\"4847\" data-end=\"4882\">\n<p data-start=\"4849\" data-end=\"4882\">Tension secondaire : <strong data-start=\"4868\" data-end=\"4882\">480Y\/277 V<\/strong><\/p>\n<\/li>\n<li data-start=\"4883\" data-end=\"4910\">\n<p data-start=\"4885\" data-end=\"4910\">Connexion : <strong data-start=\"4897\" data-end=\"4910\">Delta-Wye<\/strong><\/p>\n<\/li>\n<li data-start=\"4911\" data-end=\"4933\">\n<p data-start=\"4913\" data-end=\"4933\">Fr\u00e9quence : <strong data-start=\"4924\" data-end=\"4933\">60 Hz<\/strong><\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"4935\" data-end=\"4957\"><span class=\"ez-toc-section\" id=\"6_Grounding_System\"><\/span>6. Syst\u00e8me de mise \u00e0 la terre<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"4959\" data-end=\"5094\">Le point neutre du transformateur (X0) est connect\u00e9 \u00e0 l'entr\u00e9e de l'appareil. <strong data-start=\"5014\" data-end=\"5044\">syst\u00e8me d'\u00e9lectrodes de terre<\/strong>, La s\u00e9curit\u00e9 \u00e9lectrique et la protection contre les pannes sont assur\u00e9es.<\/p>\n<p data-start=\"4959\" data-end=\"5094\"><span style=\"font-size: 120%;\"><a href=\"https:\/\/yawei-powertransformer.com\/fr\/manufacturer\/500-kva-step-down-distribution-transformer-11kv-13-8kv-33kv-to-400v-480v\/\">Read More:Transformateur de distribution \u00e0 abaissement de 500 kVA 11kV 13.8kV 33kV \u00e0 400V 480V<\/a><\/span><\/p>\n<h3 data-start=\"5096\" data-end=\"5132\"><span class=\"ez-toc-section\" id=\"7_Low_Voltage_Distribution_Panel\"><\/span>7. Panneau de distribution basse tension<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"5134\" data-end=\"5252\">Apr\u00e8s le transformateur, le courant passe dans un <strong data-start=\"5176\" data-end=\"5212\">tableau de distribution basse tension<\/strong>, qui distribue l'\u00e9lectricit\u00e9 :<\/p>\n<ul data-start=\"5254\" data-end=\"5337\">\n<li data-start=\"5254\" data-end=\"5274\">\n<p data-start=\"5256\" data-end=\"5274\">Disjoncteurs<\/p>\n<\/li>\n<li data-start=\"5275\" data-end=\"5300\">\n<p data-start=\"5277\" data-end=\"5300\">Centres de contr\u00f4le des moteurs<\/p>\n<\/li>\n<li data-start=\"5301\" data-end=\"5320\">\n<p data-start=\"5303\" data-end=\"5320\">Panneaux d'\u00e9clairage<\/p>\n<\/li>\n<li data-start=\"5321\" data-end=\"5337\">\n<p data-start=\"5323\" data-end=\"5337\">Charges des b\u00e2timents<\/p>\n<\/li>\n<\/ul>\n<h2 data-start=\"5349\" data-end=\"5393\"><span class=\"ez-toc-section\" id=\"Where_500_kVA_Transformers_Are_Commonly_Used\"><\/span>O\u00f9 les transformateurs de 500 kVA sont couramment utilis\u00e9s<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"5395\" data-end=\"5491\">A <strong data-start=\"5397\" data-end=\"5433\">Transformateur de distribution de 500 kVA<\/strong> est largement utilis\u00e9 dans les syst\u00e8mes de distribution d'\u00e9lectricit\u00e9 de taille moyenne.<\/p>\n<h3 data-start=\"5493\" data-end=\"5517\"><span class=\"ez-toc-section\" id=\"Commercial_Buildings\"><\/span>B\u00e2timents commerciaux<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul data-start=\"5519\" data-end=\"5583\">\n<li data-start=\"5519\" data-end=\"5539\">\n<p data-start=\"5521\" data-end=\"5539\">Complexes de bureaux<\/p>\n<\/li>\n<li data-start=\"5540\" data-end=\"5550\">\n<p data-start=\"5542\" data-end=\"5550\">H\u00f4tels<\/p>\n<\/li>\n<li data-start=\"5551\" data-end=\"5569\">\n<p data-start=\"5553\" data-end=\"5569\">Centres commerciaux<\/p>\n<\/li>\n<li data-start=\"5570\" data-end=\"5583\">\n<p data-start=\"5572\" data-end=\"5583\">H\u00f4pitaux<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"5585\" data-end=\"5610\"><span class=\"ez-toc-section\" id=\"Industrial_Facilities\"><\/span>Installations industrielles<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul data-start=\"5612\" data-end=\"5682\">\n<li data-start=\"5612\" data-end=\"5636\">\n<p data-start=\"5614\" data-end=\"5636\">Usines de fabrication<\/p>\n<\/li>\n<li data-start=\"5637\" data-end=\"5651\">\n<p data-start=\"5639\" data-end=\"5651\">Entrep\u00f4ts<\/p>\n<\/li>\n<li data-start=\"5652\" data-end=\"5682\">\n<p data-start=\"5654\" data-end=\"5682\">Installations de transformation des aliments<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"5684\" data-end=\"5711\"><span class=\"ez-toc-section\" id=\"Infrastructure_Projects\"><\/span>Projets d'infrastructure<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul data-start=\"5713\" data-end=\"5805\">\n<li data-start=\"5713\" data-end=\"5746\">\n<p data-start=\"5715\" data-end=\"5746\">R\u00e9seaux de distribution des services publics<\/p>\n<\/li>\n<li data-start=\"5747\" data-end=\"5776\">\n<p data-start=\"5749\" data-end=\"5776\">Projets d'\u00e9nergie renouvelable<\/p>\n<\/li>\n<li data-start=\"5777\" data-end=\"5805\">\n<p data-start=\"5779\" data-end=\"5805\">Infrastructures municipales<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"5807\" data-end=\"5935\">Gr\u00e2ce \u00e0 sa capacit\u00e9 \u00e9quilibr\u00e9e, le transformateur de 500 kVA offre <strong data-start=\"5872\" data-end=\"5934\">distribution efficace de l'\u00e9nergie sans surdimensionnement du syst\u00e8me<\/strong>.<\/p>\n<h2 data-start=\"5947\" data-end=\"6006\"><span class=\"ez-toc-section\" id=\"Design_Standards_for_Transformers_Used_in_the_United_States\"><\/span>Normes de conception pour les transformateurs utilis\u00e9s aux \u00c9tats-Unis<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"6008\" data-end=\"6096\">Les transformateurs install\u00e9s aux \u00c9tats-Unis doivent respecter plusieurs normes industrielles.<\/p>\n<h3 data-start=\"6098\" data-end=\"6117\"><span class=\"ez-toc-section\" id=\"Major_Standards\"><\/span>Principales normes<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul data-start=\"6119\" data-end=\"6252\">\n<li data-start=\"6119\" data-end=\"6140\">\n<p data-start=\"6121\" data-end=\"6140\"><strong data-start=\"6121\" data-end=\"6140\">S\u00e9rie ANSI C57<\/strong><\/p>\n<\/li>\n<li data-start=\"6141\" data-end=\"6173\">\n<p data-start=\"6143\" data-end=\"6173\"><strong data-start=\"6143\" data-end=\"6173\">Normes IEEE pour les transformateurs<\/strong><\/p>\n<\/li>\n<li data-start=\"6174\" data-end=\"6214\">\n<p data-start=\"6176\" data-end=\"6214\"><strong data-start=\"6176\" data-end=\"6214\">Exigences du DOE en mati\u00e8re d'efficacit\u00e9 \u00e9nerg\u00e9tique<\/strong><\/p>\n<\/li>\n<li data-start=\"6215\" data-end=\"6252\">\n<p data-start=\"6217\" data-end=\"6252\"><strong data-start=\"6217\" data-end=\"6252\">Sp\u00e9cifications des transformateurs NEMA<\/strong><\/p>\n<\/li>\n<\/ul>\n<p data-start=\"6254\" data-end=\"6279\">Ces normes r\u00e9glementent :<\/p>\n<ul data-start=\"6281\" data-end=\"6376\">\n<li data-start=\"6281\" data-end=\"6302\">\n<p data-start=\"6283\" data-end=\"6302\">Niveaux d'efficacit\u00e9<\/p>\n<\/li>\n<li data-start=\"6303\" data-end=\"6330\">\n<p data-start=\"6305\" data-end=\"6330\">Exigences en mati\u00e8re d'isolation<\/p>\n<\/li>\n<li data-start=\"6331\" data-end=\"6353\">\n<p data-start=\"6333\" data-end=\"6353\">Proc\u00e9dures d'essai<\/p>\n<\/li>\n<li data-start=\"6354\" data-end=\"6376\">\n<p data-start=\"6356\" data-end=\"6376\">Performances en mati\u00e8re de s\u00e9curit\u00e9<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"6378\" data-end=\"6478\">Les fabricants qui exportent vers le march\u00e9 am\u00e9ricain doivent s'assurer que leurs transformateurs r\u00e9pondent \u00e0 ces sp\u00e9cifications.<\/p>\n<h2 data-start=\"6490\" data-end=\"6546\"><span class=\"ez-toc-section\" id=\"500_kVA_Distribution_Transformers_from_Yawei_Transformer\"><\/span>Transformateurs de distribution de 500 kVA de Yawei Transformer<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"6548\" data-end=\"6688\"><strong data-start=\"6548\" data-end=\"6569\">Transformateur Yawei<\/strong> est un fabricant professionnel sp\u00e9cialis\u00e9 dans les transformateurs de moyenne tension et de distribution pour les march\u00e9s internationaux.<\/p>\n<p data-start=\"6690\" data-end=\"6724\"><strong>Nos solutions de transformation comprennent<\/strong><\/p>\n<ul data-start=\"6726\" data-end=\"6875\">\n<li data-start=\"6726\" data-end=\"6764\">\n<p data-start=\"6728\" data-end=\"6764\"><strong data-start=\"6728\" data-end=\"6764\">Transformateurs sur socle de 500 kVA<\/strong><\/p>\n<\/li>\n<li data-start=\"6765\" data-end=\"6809\">\n<p data-start=\"6767\" data-end=\"6809\"><a href=\"https:\/\/yawei-powertransformer.com\/fr\/Wholesale\/distribution-transformers\/\"><strong data-start=\"6767\" data-end=\"6809\">transformateurs de distribution \u00e0 bain d'huile<\/strong><\/a><\/p>\n<\/li>\n<li data-start=\"6765\" data-end=\"6809\"><a href=\"https:\/\/yawei-powertransformer.com\/fr\/manufacturer\/500-kva-dry-type-cast-resin-transformer-three-phase-power-transformer-480v-400v-230v-11kv-13-2kv-15kv-20kv\/\"><strong>Transformateur sec de 500 KVA<\/strong><\/a><\/li>\n<li data-start=\"6810\" data-end=\"6839\">\n<p data-start=\"6812\" data-end=\"6839\"><a href=\"https:\/\/yawei-powertransformer.com\/fr\/Wholesale\/substation-transformers\/\"><strong data-start=\"6812\" data-end=\"6839\">transformateurs de sous-station<\/strong><\/a><\/p>\n<\/li>\n<li data-start=\"6840\" data-end=\"6875\">\n<p data-start=\"6842\" data-end=\"6875\"><strong data-start=\"6842\" data-end=\"6875\">configurations de tension personnalis\u00e9es<\/strong><\/p>\n<\/li>\n<\/ul>\n<p data-start=\"6877\" data-end=\"6915\"><strong>Les sp\u00e9cifications typiques pour l'exportation sont les suivantes<\/strong><\/p>\n<ul data-start=\"6917\" data-end=\"7119\">\n<li data-start=\"6917\" data-end=\"6978\">\n<p data-start=\"6919\" data-end=\"6978\">Tension primaire : <strong data-start=\"6936\" data-end=\"6978\">12,47 kV \/ 13,2 kV \/ 13,8 kV \/ 34,5 kV<\/strong><\/p>\n<\/li>\n<li data-start=\"6979\" data-end=\"7025\">\n<p data-start=\"6981\" data-end=\"7025\">Tension secondaire : <strong data-start=\"7000\" data-end=\"7025\">480Y\/277V \/ 208Y\/120V<\/strong><\/p>\n<\/li>\n<li data-start=\"7026\" data-end=\"7048\">\n<p data-start=\"7028\" data-end=\"7048\">Fr\u00e9quence : <strong data-start=\"7039\" data-end=\"7048\">60 Hz<\/strong><\/p>\n<\/li>\n<li data-start=\"7049\" data-end=\"7073\">\n<p data-start=\"7051\" data-end=\"7073\">Type de refroidissement : <strong data-start=\"7065\" data-end=\"7073\">ONAN<\/strong><\/p>\n<\/li>\n<li data-start=\"7074\" data-end=\"7119\">\n<p data-start=\"7076\" data-end=\"7119\">Normes : <strong data-start=\"7087\" data-end=\"7119\">Efficacit\u00e9 ANSI \/ IEEE \/ DOE<\/strong><\/p>\n<\/li>\n<\/ul>\n<p data-start=\"7121\" data-end=\"7322\">Gr\u00e2ce \u00e0 des installations de fabrication avanc\u00e9es et \u00e0 un contr\u00f4le de qualit\u00e9 rigoureux, Yawei Transformer fournit des solutions de transformation fiables aux services publics, aux entrepreneurs EPC et aux projets d'\u00e9nergie industrielle dans le monde entier.<\/p>\n<h2 data-start=\"7334\" data-end=\"7366\"><span class=\"ez-toc-section\" id=\"Frequently_Asked_Questions_FAQ\"><\/span>Foire aux questions (FAQ)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3 data-start=\"7368\" data-end=\"7410\"><span class=\"ez-toc-section\" id=\"What_is_a_transformer_unifilar_diagram\"><\/span>Qu'est-ce qu'un diagramme unifilaire de transformateur ?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"7412\" data-end=\"7631\">Un sch\u00e9ma unifilaire de transformateur est un dessin \u00e9lectrique simplifi\u00e9 qui repr\u00e9sente un syst\u00e8me d'alimentation triphas\u00e9 \u00e0 l'aide d'une seule ligne. Il montre les connexions entre les transformateurs, l'appareillage de commutation, les dispositifs de protection et les charges.<\/p>\n<h3 data-start=\"7638\" data-end=\"7712\"><span class=\"ez-toc-section\" id=\"What_voltage_is_typical_for_a_500_kVA_transformer_in_the_United_States\"><\/span>Quelle est la tension typique d'un transformateur de 500 kVA aux \u00c9tats-Unis ?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"7714\" data-end=\"7746\">Les tensions nominales typiques sont les suivantes<\/p>\n<ul data-start=\"7748\" data-end=\"7810\">\n<li data-start=\"7748\" data-end=\"7782\">\n<p data-start=\"7750\" data-end=\"7782\">Primaire : <strong data-start=\"7759\" data-end=\"7782\">12,47 kV ou 13,2 kV<\/strong><\/p>\n<\/li>\n<li data-start=\"7783\" data-end=\"7810\">\n<p data-start=\"7785\" data-end=\"7810\">Secondaire : <strong data-start=\"7796\" data-end=\"7810\">480Y\/277 V<\/strong><\/p>\n<\/li>\n<\/ul>\n<p data-start=\"7812\" data-end=\"7886\">Cette configuration est largement utilis\u00e9e dans les installations commerciales et industrielles.<\/p>\n<h3 data-start=\"7893\" data-end=\"7938\"><span class=\"ez-toc-section\" id=\"What_does_Delta%E2%80%93Wye_mean_in_a_transformer\"><\/span>Que signifie Delta-Wye dans un transformateur ?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"7940\" data-end=\"8141\">Delta-Wye se r\u00e9f\u00e8re \u00e0 la configuration de l'enroulement du transformateur o\u00f9 le c\u00f4t\u00e9 primaire utilise un <strong data-start=\"8028\" data-end=\"8048\">connexion delta<\/strong> et le c\u00f4t\u00e9 secondaire utilise un <strong data-start=\"8079\" data-end=\"8104\">connexion wye (\u00e9toile)<\/strong>, et fournit un point neutre mis \u00e0 la terre.<\/p>\n<h3 data-start=\"8148\" data-end=\"8188\"><span class=\"ez-toc-section\" id=\"Is_500_kVA_a_common_transformer_size\"><\/span>Est-ce que 500 kVA est une taille de transformateur courante ?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"8190\" data-end=\"8321\">Oui. Un transformateur de 500 kVA est une taille courante utilis\u00e9e pour les b\u00e2timents commerciaux de taille moyenne, les usines et les r\u00e9seaux de distribution des services publics.<\/p>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\n\t\n<\/div>\n\n<div class=\"wpcf7 no-js\" id=\"wpcf7-f280-o1\" lang=\"en-US\" dir=\"ltr\" data-wpcf7-id=\"280\">\n<div class=\"screen-reader-response\"><p role=\"status\" aria-live=\"polite\" aria-atomic=\"true\"><\/p> <ul><\/ul><\/div>\n<form action=\"\/fr\/wp-json\/wp\/v2\/posts\/2143#wpcf7-f280-o1\" method=\"post\" class=\"wpcf7-form init\" aria-label=\"Contact form\" novalidate=\"novalidate\" data-status=\"init\" data-trp-original-action=\"\/fr\/wp-json\/wp\/v2\/posts\/2143#wpcf7-f280-o1\">\n<fieldset class=\"hidden-fields-container\"><input type=\"hidden\" name=\"_wpcf7\" value=\"280\" \/><input type=\"hidden\" name=\"_wpcf7_version\" value=\"6.1.4\" \/><input type=\"hidden\" name=\"_wpcf7_locale\" value=\"en_US\" \/><input type=\"hidden\" name=\"_wpcf7_unit_tag\" value=\"wpcf7-f280-o1\" \/><input type=\"hidden\" name=\"_wpcf7_container_post\" value=\"0\" \/><input type=\"hidden\" name=\"_wpcf7_posted_data_hash\" value=\"\" \/>\n<\/fieldset>\n<div class='custom_contact_style'>\n\t<div class=\"row row-small\">\n\t\t<div class=\"col medium-6 small-12 large-6\">\n\t\t\t<div class=\"col-inner\">\n\t\t\t\t<p><span class=\"wpcf7-form-control-wrap\" data-name=\"your-name\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-text wpcf7-validates-as-required\" aria-required=\"true\" aria-invalid=\"false\" placeholder=\"Nom*\" value=\"\" type=\"text\" name=\"your-name\" \/><\/span>\n\t\t\t\t<\/p>\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t<div class=\"col medium-6 small-12 large-6\">\n\t\t\t<div class=\"col-inner\">\n\t\t\t\t<p><span class=\"wpcf7-form-control-wrap\" data-name=\"your-email\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-email wpcf7-validates-as-required wpcf7-text wpcf7-validates-as-email\" aria-required=\"true\" aria-invalid=\"false\" placeholder=\"Courriel*\" value=\"\" type=\"email\" name=\"your-email\" \/><\/span>\n\t\t\t\t<\/p>\n\t\t\t<\/div>\n\t\t<\/div>\n\t<\/div>\n\t<div class='cus_contact_form_bottom'>\n\t\t<p><span class=\"wpcf7-form-control-wrap\" data-name=\"your-phone\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-text\" aria-invalid=\"false\" placeholder=\"T\u00e9l\u00e9phone\" value=\"\" type=\"text\" name=\"your-phone\" \/><\/span>\n\t\t<\/p>\n\t<\/div>\n\t<div class='cus_contact_form_bottom'>\n\t\t<p><span class=\"wpcf7-form-control-wrap\" data-name=\"your-country\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-text\" aria-invalid=\"false\" placeholder=\"Pays\" value=\"\" type=\"text\" name=\"your-country\" \/><\/span>\n\t\t<\/p>\n\t<\/div>\n\t<p><span class=\"wpcf7-form-control-wrap\" data-name=\"your-message\"><textarea cols=\"40\" rows=\"10\" maxlength=\"2000\" class=\"wpcf7-form-control wpcf7-textarea wpcf7-validates-as-required\" aria-required=\"true\" aria-invalid=\"false\" placeholder=\"Votre message *\" name=\"your-message\"><\/textarea><\/span>\n\t<\/p>\n\t<div style=\"margin-bottom:10px;\">\n\t\t<p><span class=\"wpcf7-form-control-wrap kc_captcha cf7ic-toggle\" data-name=\"kc_captcha\"><span class=\"wpcf7-form-control wpcf7-radio\"><span class=\"captcha-image\" style=\"display: none;\"><span class=\"cf7ic_instructions\">Please prove you are human by selecting the<span> tree<\/span>.<\/span><label><input aria-label=\"1\" type=\"radio\" name=\"kc_captcha\" value=\"bot\" \/><svg aria-hidden=\"true\" role=\"img\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 512 512\"><path fill=\"currentColor\" d=\"M350 99c-54 0-98-35-166-35-25 0-47 4-68 12a56 56 0 004-24C118 24 95 1 66 0a56 56 0 00-34 102v386c0 13 11 24 24 24h16c13 0 24-11 24-24v-94c28-12 64-23 114-23 54 0 98 35 166 35 48 0 86-16 122-41 9-6 14-15 14-26V96c0-23-24-39-45-29-35 16-77 32-117 32z\"\/><\/svg><\/label><label><input aria-label=\"2\" type=\"radio\" name=\"kc_captcha\" value=\"bot\" \/><svg aria-hidden=\"true\" role=\"img\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\"><path fill=\"currentColor\" d=\"M624 352h-16V244c0-13-5-25-14-34L494 110c-9-9-21-14-34-14h-44V48c0-26-21-48-48-48H48C22 0 0 22 0 48v320c0 27 22 48 48 48h16a96 96 0 00192 0h128a96 96 0 00192 0h48c9 0 16-7 16-16v-32c0-9-7-16-16-16zM160 464a48 48 0 110-96 48 48 0 010 96zm320 0a48 48 0 110-96 48 48 0 010 96zm80-208H416V144h44l100 100v12z\"\/><\/svg><\/label><label><input aria-label=\"3\" type=\"radio\" name=\"kc_captcha\" value=\"kc_human\" \/><svg aria-hidden=\"true\" role=\"img\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 384 512\"><path fill=\"currentColor\" d=\"M377 375l-83-87h34c21 0 32-25 17-40l-82-88h33c21 0 32-25 18-40L210 8c-10-11-26-11-36 0L70 120c-14 15-3 40 18 40h33l-82 88c-15 15-4 40 17 40h34L7 375c-15 16-4 41 17 41h120c0 33-11 49-34 68-12 9-5 28 10 28h144c15 0 22-19 10-28-20-16-34-32-34-68h120c21 0 32-25 17-41z\"\/><\/svg><\/label>\r\n    <\/span>\r\n    <span style=\"display:none\">\r\n        <input type=\"text\" name=\"kc_honeypot\">\r\n    <\/span><\/span><\/span>\n\t\t<\/p>\n\t<\/div>\n\t<p><input class=\"wpcf7-form-control wpcf7-submit has-spinner\" type=\"submit\" value=\"Envoyer un message\" \/>\n\t<\/p>\n<\/div><div class=\"wpcf7-response-output\" aria-hidden=\"true\"><\/div>\n<input type=\"hidden\" name=\"trp-form-language\" value=\"fr\"\/><\/form>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Introduction In electrical power distribution design, engineers frequently use a unifilar diagram (also called a single-line diagram) to represent how equipment is connected within a power system. For facilities that require a 500 kVA distribution transformer, the unifilar diagram provides a simplified overview of the electrical network, including the medium-voltage supply, transformer connections, protection devices, [&#8230;]\n","protected":false},"author":3,"featured_media":2147,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[345,344,341,227,347,293,228,343,346,342],"class_list":["post-2143","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized","tag-13-2-kv-to-480v-transformer","tag-500-kva-distribution-transformer","tag-500-kva-transformer","tag-dry-type-transformer","tag-electrical-power-distribution-system","tag-oil-immersed-transformer","tag-pad-mounted-transformer","tag-single-line-diagram-transformer","tag-three-phase-transformer-diagram","tag-transformer-unifilar-diagram"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>500 kVA Transformer Unifilar Diagram Explained for United States Electrical Systems | ANSI Distribution Transformer Guide | Yawei Transformer<\/title>\n<meta name=\"description\" content=\"Learn how a 500 kVA transformer unifilar diagram is used in United States electrical power systems, including typical voltage configurations such as 13.2 kV to 480Y\/277V, transformer connection types, grounding methods, and protection equipment. This guide explains the key components of a single-line diagram for 500 kVA distribution transformers, helping engineers, EPC contractors, and industrial project managers understand transformer integration in commercial and utility power networks.The article also covers common applications of 500 kVA three-phase transformers, design considerations for U.S. electrical standards, and best practices for medium-voltage to low-voltage power distribution systems. Whether you are designing a facility power system, preparing electrical documentation, or sourcing transformers for infrastructure projects, understanding a clear transformer unifilar diagram is essential for safe and efficient power system planning.Yawei Transformer is a professional transformer manufacturer and supplier from China, providing custom 500 kVA distribution transformers, dry type transformers, oil immersed transformers, and pad mounted transformers for global power utilities, EPC contractors, and industrial applications.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/yawei-powertransformer.com\/fr\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"500 kVA Transformer Unifilar Diagram Explained for United States Electrical Systems | ANSI Distribution Transformer Guide | Yawei Transformer\" \/>\n<meta property=\"og:description\" content=\"Learn how a 500 kVA transformer unifilar diagram is used in United States electrical power systems, including typical voltage configurations such as 13.2 kV to 480Y\/277V, transformer connection types, grounding methods, and protection equipment. This guide explains the key components of a single-line diagram for 500 kVA distribution transformers, helping engineers, EPC contractors, and industrial project managers understand transformer integration in commercial and utility power networks.The article also covers common applications of 500 kVA three-phase transformers, design considerations for U.S. electrical standards, and best practices for medium-voltage to low-voltage power distribution systems. Whether you are designing a facility power system, preparing electrical documentation, or sourcing transformers for infrastructure projects, understanding a clear transformer unifilar diagram is essential for safe and efficient power system planning.Yawei Transformer is a professional transformer manufacturer and supplier from China, providing custom 500 kVA distribution transformers, dry type transformers, oil immersed transformers, and pad mounted transformers for global power utilities, EPC contractors, and industrial applications.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/yawei-powertransformer.com\/fr\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/\" \/>\n<meta property=\"og:site_name\" content=\"Electrical Power Transformer Manufacturer | 0.11\u2013500kV, 15kVA\u20131200MVA \u2013 Sichuan Yawei Transformer\" \/>\n<meta property=\"article:published_time\" content=\"2026-03-05T06:21:45+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-03-24T06:47:18+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/yawei-powertransformer.com\/wp-content\/uploads\/2026\/03\/500-kVA-Transformer-Unifilar-Diagram-Explained-for-United-States-Electrical-Systems.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"900\" \/>\n\t<meta property=\"og:image:height\" content=\"600\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<meta name=\"author\" content=\"Yawei Transformer\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"Yawei Transformer\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/yawei-powertransformer.com\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/\",\"url\":\"https:\/\/yawei-powertransformer.com\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/\",\"name\":\"500 kVA Transformer Unifilar Diagram Explained for United States Electrical Systems | ANSI Distribution Transformer Guide | Yawei Transformer\",\"isPartOf\":{\"@id\":\"https:\/\/yawei-powertransformer.com\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/yawei-powertransformer.com\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/yawei-powertransformer.com\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/yawei-powertransformer.com\/wp-content\/uploads\/2026\/03\/500-kVA-Transformer-Unifilar-Diagram-Explained-for-United-States-Electrical-Systems.webp\",\"datePublished\":\"2026-03-05T06:21:45+00:00\",\"dateModified\":\"2026-03-24T06:47:18+00:00\",\"author\":{\"@id\":\"https:\/\/yawei-powertransformer.com\/#\/schema\/person\/0ae22f493b65e21297ff883a900a4406\"},\"description\":\"Learn how a 500 kVA transformer unifilar diagram is used in United States electrical power systems, including typical voltage configurations such as 13.2 kV to 480Y\/277V, transformer connection types, grounding methods, and protection equipment. This guide explains the key components of a single-line diagram for 500 kVA distribution transformers, helping engineers, EPC contractors, and industrial project managers understand transformer integration in commercial and utility power networks.The article also covers common applications of 500 kVA three-phase transformers, design considerations for U.S. electrical standards, and best practices for medium-voltage to low-voltage power distribution systems. Whether you are designing a facility power system, preparing electrical documentation, or sourcing transformers for infrastructure projects, understanding a clear transformer unifilar diagram is essential for safe and efficient power system planning.Yawei Transformer is a professional transformer manufacturer and supplier from China, providing custom 500 kVA distribution transformers, dry type transformers, oil immersed transformers, and pad mounted transformers for global power utilities, EPC contractors, and industrial applications.\",\"breadcrumb\":{\"@id\":\"https:\/\/yawei-powertransformer.com\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#breadcrumb\"},\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/yawei-powertransformer.com\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\/\/yawei-powertransformer.com\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#primaryimage\",\"url\":\"https:\/\/yawei-powertransformer.com\/wp-content\/uploads\/2026\/03\/500-kVA-Transformer-Unifilar-Diagram-Explained-for-United-States-Electrical-Systems.webp\",\"contentUrl\":\"https:\/\/yawei-powertransformer.com\/wp-content\/uploads\/2026\/03\/500-kVA-Transformer-Unifilar-Diagram-Explained-for-United-States-Electrical-Systems.webp\",\"width\":900,\"height\":600,\"caption\":\"Detailed unifilar (single-line) diagram of a 500 kVA distribution transformer for U.S. power systems, designed and supplied by a professional China transformer manufacturer and factory for industrial, commercial, and utility applications.\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/yawei-powertransformer.com\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/yawei-powertransformer.com\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"500 kVA Transformer Unifilar Diagram Explained for United States Electrical Systems\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/yawei-powertransformer.com\/#website\",\"url\":\"https:\/\/yawei-powertransformer.com\/\",\"name\":\"Electrical Power Transformer Manufacturer | 0.11\u2013500kV, 15kVA\u20131200MVA \u2013 Sichuan Yawei Transformer\",\"description\":\"Yawei Transformer is a professional China-based electrical power transformer manufacturer and factory, specializing in customized transformer solutions with voltage ratings from 0.11kV to 500kV and capacities from 15kVA to 1200MVA. Our products include distribution, pad-mounted, pole-mounted, dry-type, oil-immersed, and high-voltage power transformers, meeting UL, CE, and ISO standards and supplied to customers across the USA, Canada, and global markets.\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/yawei-powertransformer.com\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"fr-FR\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/yawei-powertransformer.com\/#\/schema\/person\/0ae22f493b65e21297ff883a900a4406\",\"name\":\"Yawei Transformer\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\/\/yawei-powertransformer.com\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/yawei-powertransformer.com\/wp-content\/uploads\/2026\/01\/Yawei-Transformer-is-a-China-based-manufacturer-specializing-in-6\u2013500kV-electric-power-transformers-for-transmission-distribution-and-substation-applications-100x100.png\",\"contentUrl\":\"https:\/\/yawei-powertransformer.com\/wp-content\/uploads\/2026\/01\/Yawei-Transformer-is-a-China-based-manufacturer-specializing-in-6\u2013500kV-electric-power-transformers-for-transmission-distribution-and-substation-applications-100x100.png\",\"caption\":\"Yawei Transformer\"},\"description\":\"Yawei Transformer, a leading transformer manufacturer, is expanding its global production capacity with a new factory in Sichuan, set to begin full operation in 2026. Equipped with modern facilities, professional engineering teams, and comprehensive testing capabilities, the new Sichuan factory produces a full range of transformers\u2014from 6\u202fkV to 500\u202fkV and 15\u202fkVA to 1200\u202fMVA\u2014designed to meet international standards. Supported by Jiangsu Yawei Transformer, the group headquarters, Yawei delivers customized, high-quality, and reliable transformer solutions to customers worldwide, serving utilities, industrial sites, commercial projects, data centers, and renewable energy applications.\",\"url\":\"https:\/\/yawei-powertransformer.com\/fr\/author\/muban\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Transformateur 500 kVA Diagramme Unifilar expliqu\u00e9 pour les syst\u00e8mes \u00e9lectriques des \u00c9tats-Unis | Guide des transformateurs de distribution ANSI | Transformateur Yawei","description":"D\u00e9couvrez comment un sch\u00e9ma unifilaire de transformateur de 500 kVA est utilis\u00e9 dans les r\u00e9seaux \u00e9lectriques des \u00c9tats-Unis, y compris les configurations de tension typiques telles que 13,2 kV \u00e0 480Y\/277V, les types de connexion de transformateur, les m\u00e9thodes de mise \u00e0 la terre et l'\u00e9quipement de protection. Ce guide explique les composants cl\u00e9s d'un sch\u00e9ma unifilaire pour les transformateurs de distribution de 500 kVA, aidant les ing\u00e9nieurs, les entrepreneurs EPC et les chefs de projets industriels \u00e0 comprendre l'int\u00e9gration des transformateurs dans les r\u00e9seaux \u00e9lectriques commerciaux et publics. L'article couvre \u00e9galement les applications courantes des transformateurs triphas\u00e9s de 500 kVA, les consid\u00e9rations de conception pour les normes \u00e9lectriques am\u00e9ricaines et les meilleures pratiques pour les syst\u00e8mes de distribution d'\u00e9nergie de moyenne tension \u00e0 basse tension. Yawei Transformer est un fabricant et fournisseur professionnel de transformateurs en Chine, fournissant des transformateurs de distribution de 500 kVA, des transformateurs de type sec, des transformateurs immerg\u00e9s dans l'huile et des transformateurs sur socle pour les compagnies d'\u00e9lectricit\u00e9, les entrepreneurs EPC et les applications industrielles du monde entier.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/yawei-powertransformer.com\/fr\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/","og_locale":"fr_FR","og_type":"article","og_title":"500 kVA Transformer Unifilar Diagram Explained for United States Electrical Systems | ANSI Distribution Transformer Guide | Yawei Transformer","og_description":"Learn how a 500 kVA transformer unifilar diagram is used in United States electrical power systems, including typical voltage configurations such as 13.2 kV to 480Y\/277V, transformer connection types, grounding methods, and protection equipment. This guide explains the key components of a single-line diagram for 500 kVA distribution transformers, helping engineers, EPC contractors, and industrial project managers understand transformer integration in commercial and utility power networks.The article also covers common applications of 500 kVA three-phase transformers, design considerations for U.S. electrical standards, and best practices for medium-voltage to low-voltage power distribution systems. Whether you are designing a facility power system, preparing electrical documentation, or sourcing transformers for infrastructure projects, understanding a clear transformer unifilar diagram is essential for safe and efficient power system planning.Yawei Transformer is a professional transformer manufacturer and supplier from China, providing custom 500 kVA distribution transformers, dry type transformers, oil immersed transformers, and pad mounted transformers for global power utilities, EPC contractors, and industrial applications.","og_url":"https:\/\/yawei-powertransformer.com\/fr\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/","og_site_name":"Electrical Power Transformer Manufacturer | 0.11\u2013500kV, 15kVA\u20131200MVA \u2013 Sichuan Yawei Transformer","article_published_time":"2026-03-05T06:21:45+00:00","article_modified_time":"2026-03-24T06:47:18+00:00","og_image":[{"width":900,"height":600,"url":"https:\/\/yawei-powertransformer.com\/wp-content\/uploads\/2026\/03\/500-kVA-Transformer-Unifilar-Diagram-Explained-for-United-States-Electrical-Systems.webp","type":"image\/webp"}],"author":"Yawei Transformer","twitter_card":"summary_large_image","twitter_misc":{"\u00c9crit par":"Yawei Transformer","Dur\u00e9e de lecture estim\u00e9e":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/yawei-powertransformer.com\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/","url":"https:\/\/yawei-powertransformer.com\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/","name":"Transformateur 500 kVA Diagramme Unifilar expliqu\u00e9 pour les syst\u00e8mes \u00e9lectriques des \u00c9tats-Unis | Guide des transformateurs de distribution ANSI | Transformateur Yawei","isPartOf":{"@id":"https:\/\/yawei-powertransformer.com\/#website"},"primaryImageOfPage":{"@id":"https:\/\/yawei-powertransformer.com\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#primaryimage"},"image":{"@id":"https:\/\/yawei-powertransformer.com\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#primaryimage"},"thumbnailUrl":"https:\/\/yawei-powertransformer.com\/wp-content\/uploads\/2026\/03\/500-kVA-Transformer-Unifilar-Diagram-Explained-for-United-States-Electrical-Systems.webp","datePublished":"2026-03-05T06:21:45+00:00","dateModified":"2026-03-24T06:47:18+00:00","author":{"@id":"https:\/\/yawei-powertransformer.com\/#\/schema\/person\/0ae22f493b65e21297ff883a900a4406"},"description":"D\u00e9couvrez comment un sch\u00e9ma unifilaire de transformateur de 500 kVA est utilis\u00e9 dans les r\u00e9seaux \u00e9lectriques des \u00c9tats-Unis, y compris les configurations de tension typiques telles que 13,2 kV \u00e0 480Y\/277V, les types de connexion de transformateur, les m\u00e9thodes de mise \u00e0 la terre et l'\u00e9quipement de protection. Ce guide explique les composants cl\u00e9s d'un sch\u00e9ma unifilaire pour les transformateurs de distribution de 500 kVA, aidant les ing\u00e9nieurs, les entrepreneurs EPC et les chefs de projets industriels \u00e0 comprendre l'int\u00e9gration des transformateurs dans les r\u00e9seaux \u00e9lectriques commerciaux et publics. L'article couvre \u00e9galement les applications courantes des transformateurs triphas\u00e9s de 500 kVA, les consid\u00e9rations de conception pour les normes \u00e9lectriques am\u00e9ricaines et les meilleures pratiques pour les syst\u00e8mes de distribution d'\u00e9nergie de moyenne tension \u00e0 basse tension. Yawei Transformer est un fabricant et fournisseur professionnel de transformateurs en Chine, fournissant des transformateurs de distribution de 500 kVA, des transformateurs de type sec, des transformateurs immerg\u00e9s dans l'huile et des transformateurs sur socle pour les compagnies d'\u00e9lectricit\u00e9, les entrepreneurs EPC et les applications industrielles du monde entier.","breadcrumb":{"@id":"https:\/\/yawei-powertransformer.com\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#breadcrumb"},"inLanguage":"fr-FR","potentialAction":[{"@type":"ReadAction","target":["https:\/\/yawei-powertransformer.com\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/"]}]},{"@type":"ImageObject","inLanguage":"fr-FR","@id":"https:\/\/yawei-powertransformer.com\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#primaryimage","url":"https:\/\/yawei-powertransformer.com\/wp-content\/uploads\/2026\/03\/500-kVA-Transformer-Unifilar-Diagram-Explained-for-United-States-Electrical-Systems.webp","contentUrl":"https:\/\/yawei-powertransformer.com\/wp-content\/uploads\/2026\/03\/500-kVA-Transformer-Unifilar-Diagram-Explained-for-United-States-Electrical-Systems.webp","width":900,"height":600,"caption":"Detailed unifilar (single-line) diagram of a 500 kVA distribution transformer for U.S. power systems, designed and supplied by a professional China transformer manufacturer and factory for industrial, commercial, and utility applications."},{"@type":"BreadcrumbList","@id":"https:\/\/yawei-powertransformer.com\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/yawei-powertransformer.com\/"},{"@type":"ListItem","position":2,"name":"500 kVA Transformer Unifilar Diagram Explained for United States Electrical Systems"}]},{"@type":"WebSite","@id":"https:\/\/yawei-powertransformer.com\/#website","url":"https:\/\/yawei-powertransformer.com\/","name":"Fabricant de transformateurs de puissance \u00e9lectrique | 0.11-500kV, 15kVA-1200MVA - Sichuan Yawei Transformer","description":"Yawei Transformer est un fabricant et une usine de transformateurs \u00e9lectriques professionnels bas\u00e9s en Chine, sp\u00e9cialis\u00e9s dans les solutions de transformation personnalis\u00e9es avec des tensions nominales de 0,11kV \u00e0 500kV et des capacit\u00e9s de 15kVA \u00e0 1200MVA. Nos produits comprennent des transformateurs de distribution, des transformateurs mont\u00e9s sur socle ou sur poteau, des transformateurs secs, des transformateurs \u00e0 bain d'huile et des transformateurs haute tension, conformes aux normes UL, CE et ISO, et fournis \u00e0 des clients aux \u00c9tats-Unis, au Canada et sur les march\u00e9s mondiaux.","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/yawei-powertransformer.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"fr-FR"},{"@type":"Person","@id":"https:\/\/yawei-powertransformer.com\/#\/schema\/person\/0ae22f493b65e21297ff883a900a4406","name":"Transformateur Yawei","image":{"@type":"ImageObject","inLanguage":"fr-FR","@id":"https:\/\/yawei-powertransformer.com\/#\/schema\/person\/image\/","url":"https:\/\/yawei-powertransformer.com\/wp-content\/uploads\/2026\/01\/Yawei-Transformer-is-a-China-based-manufacturer-specializing-in-6\u2013500kV-electric-power-transformers-for-transmission-distribution-and-substation-applications-100x100.png","contentUrl":"https:\/\/yawei-powertransformer.com\/wp-content\/uploads\/2026\/01\/Yawei-Transformer-is-a-China-based-manufacturer-specializing-in-6\u2013500kV-electric-power-transformers-for-transmission-distribution-and-substation-applications-100x100.png","caption":"Yawei Transformer"},"description":"Yawei Transformer, l'un des principaux fabricants de transformateurs, \u00e9tend sa capacit\u00e9 de production mondiale avec une nouvelle usine dans le Sichuan, qui devrait commencer \u00e0 fonctionner pleinement en 2026. Dot\u00e9e d'installations modernes, d'\u00e9quipes d'ing\u00e9nieurs professionnels et de capacit\u00e9s de test compl\u00e8tes, la nouvelle usine du Sichuan produit une gamme compl\u00e8te de transformateurs - de 6 kV \u00e0 500 kV et de 15 kVA \u00e0 1200 MVA - con\u00e7us pour r\u00e9pondre aux normes internationales. Soutenue par Jiangsu Yawei Transformer, le si\u00e8ge du groupe, Yawei fournit des solutions de transformateurs personnalis\u00e9es, de haute qualit\u00e9 et fiables \u00e0 des clients du monde entier, desservant des services publics, des sites industriels, des projets commerciaux, des centres de donn\u00e9es et des applications d'\u00e9nergie renouvelable.","url":"https:\/\/yawei-powertransformer.com\/fr\/author\/muban\/"}]}},"_links":{"self":[{"href":"https:\/\/yawei-powertransformer.com\/fr\/wp-json\/wp\/v2\/posts\/2143","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/yawei-powertransformer.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/yawei-powertransformer.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/yawei-powertransformer.com\/fr\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/yawei-powertransformer.com\/fr\/wp-json\/wp\/v2\/comments?post=2143"}],"version-history":[{"count":5,"href":"https:\/\/yawei-powertransformer.com\/fr\/wp-json\/wp\/v2\/posts\/2143\/revisions"}],"predecessor-version":[{"id":2201,"href":"https:\/\/yawei-powertransformer.com\/fr\/wp-json\/wp\/v2\/posts\/2143\/revisions\/2201"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/yawei-powertransformer.com\/fr\/wp-json\/wp\/v2\/media\/2147"}],"wp:attachment":[{"href":"https:\/\/yawei-powertransformer.com\/fr\/wp-json\/wp\/v2\/media?parent=2143"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/yawei-powertransformer.com\/fr\/wp-json\/wp\/v2\/categories?post=2143"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/yawei-powertransformer.com\/fr\/wp-json\/wp\/v2\/tags?post=2143"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}