{"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\/zh\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/","title":{"rendered":"\u7f8e\u570b\u96fb\u6c23\u7cfb\u7d71 500 kVA \u8b8a\u58d3\u5668 Unifilar \u5716\u89e3\u8aaa\u660e"},"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\">\u76ee\u9304<\/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=\"\u5207\u63db\u5167\u5bb9\u8868\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">\u5207\u63db<\/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\/zh\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#Introduction\" >\u7c21\u4ecb<\/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\/zh\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#What_Is_a_Unifilar_Diagram_in_Power_System_Engineering\" >\u4ec0\u9ebc\u662f\u96fb\u529b\u7cfb\u7d71\u5de5\u7a0b\u4e2d\u7684 Unifilar \u5716\u8868\uff1f<\/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\/zh\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#Primary_Voltage_Medium_Voltage\" >\u4e00\u6b21\u96fb\u58d3\uff08\u4e2d\u58d3\uff09<\/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\/zh\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#Secondary_Voltage_Low_Voltage\" >\u4e8c\u6b21\u96fb\u58d3\uff08\u4f4e\u96fb\u58d3\uff09<\/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\/zh\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#Typical_Connection_Type_for_a_500_kVA_Transformer\" >500 kVA \u8b8a\u58d3\u5668\u7684\u5178\u578b\u9023\u63a5\u985e\u578b<\/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\/zh\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#Advantages_of_Delta%E2%80%93Wye_Configuration\" >Delta-Wye \u7d44\u614b\u7684\u512a\u9ede<\/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\/zh\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#Main_Components_in_a_500_kVA_Transformer_Unifilar_Diagram\" >500 kVA \u8b8a\u58d3\u5668\u7684\u4e3b\u8981\u5143\u4ef6 Unifilar \u5716\u8868<\/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\/zh\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#1_Medium_Voltage_Utility_Supply\" >1.\u4e2d\u96fb\u58d3\u5e02\u96fb\u4f9b\u61c9<\/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\/zh\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#2_High_Voltage_Disconnect_Switch\" >2.\u9ad8\u58d3\u65b7\u958b\u958b\u95dc<\/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\/zh\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#3_Surge_Arresters\" >3.\u907f\u96f7\u5668<\/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\/zh\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#4_High_Voltage_Protection\" >4.\u9ad8\u58d3\u4fdd\u8b77<\/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\/zh\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#5_500_kVA_Transformer\" >5.500 kVA \u8b8a\u58d3\u5668<\/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\/zh\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#6_Grounding_System\" >6.\u63a5\u5730\u7cfb\u7d71<\/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\/zh\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#7_Low_Voltage_Distribution_Panel\" >7.\u4f4e\u96fb\u58d3\u914d\u96fb\u76e4<\/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\/zh\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#Where_500_kVA_Transformers_Are_Commonly_Used\" >\u5e38\u7528 500 kVA \u8b8a\u58d3\u5668\u7684\u5730\u65b9<\/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\/zh\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#Commercial_Buildings\" >\u5546\u696d\u5efa\u7bc9<\/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\/zh\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#Industrial_Facilities\" >\u5de5\u696d\u8a2d\u65bd<\/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\/zh\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#Infrastructure_Projects\" >\u57fa\u790e\u5efa\u8a2d\u5c08\u6848<\/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\/zh\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#Design_Standards_for_Transformers_Used_in_the_United_States\" >\u7f8e\u570b\u4f7f\u7528\u7684\u8b8a\u58d3\u5668\u8a2d\u8a08\u6a19\u6e96<\/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\/zh\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#Major_Standards\" >\u4e3b\u8981\u6a19\u6e96<\/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\/zh\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#500_kVA_Distribution_Transformers_from_Yawei_Transformer\" >\u4e9e\u5a01500kVA\u914d\u96fb\u8b8a\u58d3\u5668<\/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\/zh\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#Frequently_Asked_Questions_FAQ\" >\u5e38\u898b\u554f\u984c (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\/zh\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#What_is_a_transformer_unifilar_diagram\" >\u4ec0\u9ebc\u662f\u8b8a\u58d3\u5668\u55ae\u7dda\u5716?<\/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\/zh\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#What_voltage_is_typical_for_a_500_kVA_transformer_in_the_United_States\" >\u7f8e\u570b 500 kVA \u8b8a\u58d3\u5668\u7684\u5178\u578b\u96fb\u58d3\u662f\u591a\u5c11\uff1f<\/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\/zh\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#What_does_Delta%E2%80%93Wye_mean_in_a_transformer\" >\u8b8a\u58d3\u5668\u4e2d\u7684 Delta-Wye \u662f\u4ec0\u9ebc\u610f\u601d\uff1f<\/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\/zh\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/#Is_500_kVA_a_common_transformer_size\" >500 kVA \u662f\u5e38\u898b\u7684\u8b8a\u58d3\u5668\u898f\u683c\u55ce\uff1f<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 data-start=\"862\" data-end=\"876\"><span class=\"ez-toc-section\" id=\"Introduction\"><\/span>\u7c21\u4ecb<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"878\" data-end=\"1067\">\u5728\u914d\u96fb\u8a2d\u8a08\u4e2d\uff0c\u5de5\u7a0b\u5e2b\u7d93\u5e38\u4f7f\u7528\u55ae\u7dda\u5716\uff08\u4e5f\u7a31\u70ba\u55ae\u7dda\u5716\uff09\u4f86\u8868\u793a\u8a2d\u5099\u5728\u96fb\u529b\u7cfb\u7d71\u4e2d\u7684\u9023\u63a5\u65b9\u5f0f\u3002.<\/p>\n<p data-start=\"1069\" data-end=\"1349\">\u5c0d\u65bc\u9700\u8981 500 kVA \u914d\u96fb\u8b8a\u58d3\u5668\u7684\u8a2d\u65bd\uff0cunifilar \u5716\u63d0\u4f9b\u4e86\u96fb\u529b\u7db2\u8def\u7684\u7c21\u5316\u6982\u8ff0\uff0c\u5305\u62ec\u4e2d\u58d3\u4f9b\u96fb\u3001\u8b8a\u58d3\u5668\u9023\u63a5\u3001\u4fdd\u8b77\u88dd\u7f6e\u3001\u63a5\u5730\u7cfb\u7d71\u548c\u4f4e\u58d3\u914d\u96fb\u3002.<\/p>\n<p data-start=\"1351\" data-end=\"1578\">\u5728\u7f8e\u570b\uff0c\u8b8a\u58d3\u5668\u5b89\u88dd\u901a\u5e38\u9075\u5faa ANSI\u3001IEEE \u548c DOE \u6548\u7387\u6a19\u6e96\uff0c\u5178\u578b\u7684\u96fb\u58d3\u914d\u7f6e\u5305\u62ec 13.2 kV \/ 12.47 kV \u4e00\u6b21\u96fb\u58d3\u548c 480Y\/277V \u4e8c\u6b21\u96fb\u58d3\u3002.<\/p>\n<p data-start=\"1580\" data-end=\"1758\">\u672c\u6307\u5357\u8aaa\u660e 500 kVA \u8b8a\u58d3\u5668\u55ae\u7aef\u5716\u7684\u7d50\u69cb\u3001\u5305\u542b\u7684\u5143\u4ef6\uff0c\u4ee5\u53ca\u5728\u5be6\u969b\u5546\u696d\u548c\u5de5\u696d\u96fb\u529b\u7cfb\u7d71\u4e2d\u7684\u4f7f\u7528\u65b9\u5f0f\u3002.<\/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>\u4ec0\u9ebc\u662f\u96fb\u529b\u7cfb\u7d71\u5de5\u7a0b\u4e2d\u7684 Unifilar \u5716\u8868\uff1f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"1826\" data-end=\"1969\">\u55ae\u7dda\u5716\u662f\u96fb\u529b\u7cfb\u7d71\u7684\u7c21\u5316\u8868\u793a\u6cd5\uff0c\u4f7f\u7528\u4e00\u689d\u7dda\u8868\u793a\u4e09\u76f8\u5c0e\u9ad4\u3002.<\/p>\n<p data-start=\"1971\" data-end=\"2082\">\u5716\u8868\u4e26\u975e\u7e6a\u88fd\u6bcf\u500b\u55ae\u7368\u7684\u76f8\u4f4d\uff0c\u800c\u662f\u986f\u793a\u8a2d\u5099\u4e4b\u9593\u7684\u529f\u80fd\u95dc\u4fc2\u3002.<\/p>\n<p data-start=\"2084\" data-end=\"2120\"><strong>\u5de5\u7a0b\u5e2b\u4f7f\u7528 unifilar \u5716\u8868\uff1a<\/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\">\u96fb\u6c23\u7cfb\u7d71\u898f\u5283<\/p>\n<\/li>\n<li data-start=\"2153\" data-end=\"2174\">\n<p data-start=\"2155\" data-end=\"2174\">\u8b8a\u96fb\u7ad9\u8a2d\u8a08<\/p>\n<\/li>\n<li data-start=\"2175\" data-end=\"2203\">\n<p data-start=\"2177\" data-end=\"2203\">\u8b8a\u58d3\u5668\u5b89\u88dd<\/p>\n<\/li>\n<li data-start=\"2204\" data-end=\"2231\">\n<p data-start=\"2206\" data-end=\"2231\">\u4fdd\u8b77\u5354\u8abf<\/p>\n<\/li>\n<li data-start=\"2232\" data-end=\"2261\">\n<p data-start=\"2234\" data-end=\"2261\">\u7dad\u8b77\u6587\u4ef6<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"2263\" data-end=\"2334\"><strong>\u5c0d\u65bc\u8b8a\u58d3\u5668\u7684\u5b89\u88dd\uff0c\u901a\u5e38\u6703\u4ee5\u55ae\u7dda\u5716\u8aaa\u660e\uff1a<\/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\">\u516c\u7528\u4e8b\u696d\u9032\u6599\u994b\u7dda<\/p>\n<\/li>\n<li data-start=\"2364\" data-end=\"2402\">\n<p data-start=\"2366\" data-end=\"2402\">\u4e2d\u58d3\u958b\u95dc\u8a2d\u5099<\/p>\n<\/li>\n<li data-start=\"2403\" data-end=\"2447\">\n<p data-start=\"2405\" data-end=\"2447\">\u8b8a\u58d3\u5668\u5bb9\u91cf\u548c\u9023\u63a5\u985e\u578b<\/p>\n<\/li>\n<li data-start=\"2448\" data-end=\"2476\">\n<p data-start=\"2450\" data-end=\"2476\">\u7a81\u6ce2\u4fdd\u8b77\u88dd\u7f6e<\/p>\n<\/li>\n<li data-start=\"2477\" data-end=\"2504\">\n<p data-start=\"2479\" data-end=\"2504\">\u63a5\u5730\u914d\u7f6e<\/p>\n<\/li>\n<li data-start=\"2505\" data-end=\"2540\">\n<p data-start=\"2507\" data-end=\"2540\">\u4f4e\u96fb\u58d3\u914d\u96fb\u76e4<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"2542\" data-end=\"2666\">\u7531\u65bc\u5176\u7c21\u55ae\u6027\uff0cunifilar \u5716\u662f\u96fb\u5b50\u5de5\u7a0b\u8a2d\u8a08\u4e2d\u6700\u91cd\u8981\u7684\u6587\u4ef6\u4e4b\u4e00\u3002.<\/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=\"\u4e2d\u570b\u8b8a\u58d3\u5668\u88fd\u9020\u5546\u548c\u4f9b\u61c9\u5546\u70ba\u5de5\u696d\u3001\u5546\u696d\u548c\u516c\u7528\u4e8b\u696d\u9805\u76ee\u88fd\u4f5c\u7684\u7f8e\u570b\u914d\u96fb\u7528 500 kVA \u8b8a\u58d3\u5668\u7684 Unifilar \u5716\uff0c\u986f\u793a\u4e2d\u4f4e\u58d3\u9023\u63a5\u3002\" 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-1392412947\">\n\n\t<div id=\"col-236090434\" 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\">\u7f8e\u570b 500 kVA \u8b8a\u58d3\u5668\u7684\u5178\u578b\u96fb\u58d3\u914d\u7f6e<\/p>\n<p data-start=\"2756\" data-end=\"2928\">\u5728\u5317\u7f8e\u7684\u7d93\u92b7\u7db2\u8def\u4e2d\uff0c\u4e00\u500b <a href=\"https:\/\/yawei-powertransformer.com\/zh\/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\">500 kVA \u588a\u5f0f\u8b8a\u58d3\u5668<\/strong><\/a> \u901a\u5e38\u7528\u65bc\u964d\u7d1a <strong data-start=\"2853\" data-end=\"2927\">\u5f9e\u5e02\u96fb\u994b\u7dda\u7684\u4e2d\u96fb\u58d3\u8f49\u63db\u70ba\u4f4e\u96fb\u58d3\uff0c\u4f9b\u5efa\u7bc9\u8ca0\u8f09\u4f7f\u7528<\/strong>.<\/p>\n<h2 data-start=\"2930\" data-end=\"2965\"><span class=\"ez-toc-section\" id=\"Primary_Voltage_Medium_Voltage\"><\/span>\u4e00\u6b21\u96fb\u58d3\uff08\u4e2d\u58d3\uff09<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"2967\" data-end=\"2999\">\u5e38\u898b\u7684\u4e00\u6b21\u96fb\u58d3\u5305\u62ec<\/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\">\u9019\u4e9b\u96fb\u58d3\u901a\u5e38\u4f86\u81ea <strong data-start=\"3096\" data-end=\"3146\">\u516c\u7528\u914d\u96fb\u7dda\u6216\u8b8a\u96fb\u7ad9\u994b\u7dda<\/strong>.<\/p>\n<h2 data-start=\"3149\" data-end=\"3183\"><span class=\"ez-toc-section\" id=\"Secondary_Voltage_Low_Voltage\"><\/span>\u4e8c\u6b21\u96fb\u58d3\uff08\u4f4e\u96fb\u58d3\uff09<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"3185\" data-end=\"3228\">\u6700\u5e38\u898b\u7684\u6b21\u8981\u914d\u7f6e\u70ba\uff1a<\/p>\n<p data-start=\"3230\" data-end=\"3270\"><strong data-start=\"3230\" data-end=\"3270\">480Y \/ 277 V\uff0c\u4e09\u76f8\uff0c\u56db\u7dda\u5236<\/strong><\/p>\n<p data-start=\"3272\" data-end=\"3291\">\u6b64\u7cfb\u7d71\u5141\u8a31<\/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> \u7528\u65bc\u99ac\u9054\u3001HVAC \u8a2d\u5099\u548c\u5de5\u696d\u6a5f\u68b0<\/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> \u7528\u65bc\u5546\u696d\u7167\u660e\u7cfb\u7d71<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"3407\" data-end=\"3449\">\u5176\u4ed6\u53ef\u80fd\u7684\u4e8c\u6b21\u96fb\u58d3\u5305\u62ec<\/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\uff08\u5728\u7f8e\u570b\u8f03\u5c11\u898b\uff09<\/p>\n<\/li>\n<\/ul>\n<div class=\"row\"  id=\"row-1894884953\">\n\n\t<div id=\"col-630059143\" 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_2091173767\">\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=\"\u4e2d\u570b\u8b8a\u58d3\u5668\u5ee0\u751f\u7522\u7684 500 kVA \u588a\u5f0f\u8b8a\u58d3\u5668\uff0c\u7528\u65bc\u7f8e\u570b\u914d\u96fb\u7cfb\u7d71\uff0cANSI \u6a19\u6e96\u4e09\u76f8\u5730\u4e0b\u914d\u96fb\u8b8a\u58d3\u5668\u4f9b\u61c9\u5546\" 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_2091173767 {\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-1098981698\" 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_871603826\">\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=\"500 kVA \u4e7e\u5f0f\u8b8a\u58d3\u5668\uff0c\u7531\u4e2d\u570b\u8b8a\u58d3\u5668\u5ee0\u88fd\u9020\uff0c\u7528\u65bc\u5de5\u696d\u914d\u96fb\u7cfb\u7d71\uff0c\u4e09\u76f8\u96fb\u529b\u8b8a\u58d3\u5668\u4f9b\u61c9\u5546\uff0c\u7528\u65bc\u5546\u696d\u548c\u516c\u7528\u4e8b\u696d\u9805\u76ee\" 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_871603826 {\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-1253346095\" 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_189346108\">\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=\"500 kVA \u4e09\u76f8\u6cb9\u6d78\u5f0f\u8b8a\u58d3\u5668\uff0c\u7531\u4e2d\u570b\u96fb\u529b\u8b8a\u58d3\u5668\u5de5\u5ee0\u88fd\u9020\uff0c\u5de5\u696d\u53ca\u516c\u7528\u4e8b\u696d\u96fb\u529b\u8b8a\u58d3\u5668\u4f9b\u61c9\u5546\uff0c\u9069\u7528\u65bc\u5546\u696d\u53ca\u57fa\u790e\u5efa\u8a2d\u9805\u76ee\" 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_189346108 {\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>500 kVA \u8b8a\u58d3\u5668\u7684\u5178\u578b\u9023\u63a5\u985e\u578b<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"3574\" data-end=\"3671\">\u5927\u591a\u6578\u7528\u65bc\u5546\u696d\u5efa\u7bc9\u7684\u914d\u96fb\u8b8a\u58d3\u5668\u90fd\u4f7f\u7528 <strong data-start=\"3640\" data-end=\"3670\">Delta-Wye (\u0394-Y) \u9023\u63a5<\/strong>.<\/p>\n<h3 data-start=\"3673\" data-end=\"3714\"><span class=\"ez-toc-section\" id=\"Advantages_of_Delta%E2%80%93Wye_Configuration\"><\/span>Delta-Wye \u7d44\u614b\u7684\u512a\u9ede<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\">\u63d0\u4f9b\u4e00\u500b <strong data-start=\"3730\" data-end=\"3754\">\u7a69\u5b9a\u4e2d\u9ede<\/strong> \u7528\u65bc\u63a5\u5730<\/p>\n<\/li>\n<li data-start=\"3771\" data-end=\"3823\">\n<p data-start=\"3774\" data-end=\"3823\">\u652f\u63f4 <strong data-start=\"3783\" data-end=\"3821\">\u4e09\u76f8\u548c\u55ae\u76f8\u8ca0\u8f09<\/strong><\/p>\n<\/li>\n<li data-start=\"3824\" data-end=\"3864\">\n<p data-start=\"3827\" data-end=\"3864\">\u6e1b\u5c11 <strong data-start=\"3849\" data-end=\"3862\">\u8ae7\u6ce2<\/strong><\/p>\n<\/li>\n<li data-start=\"3865\" data-end=\"3897\">\n<p data-start=\"3868\" data-end=\"3897\">\u63d0\u9ad8\u7cfb\u7d71\u53ef\u9760\u6027<\/p>\n<\/li>\n<\/ol>\n<p data-start=\"3899\" data-end=\"4021\">\u63a5\u5730\u4e2d\u6027\u9ede (X0) \u5141\u8a31\u5b89\u5168\u914d\u96fb\u3002 <strong data-start=\"3959\" data-end=\"3983\">277 V \u7167\u660e\u8ca0\u8f09<\/strong> \u4e26\u63d0\u4f9b\u9069\u7576\u7684\u6545\u969c\u4fdd\u8b77\u3002.<\/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>500 kVA \u8b8a\u58d3\u5668\u7684\u4e3b\u8981\u5143\u4ef6 Unifilar \u5716\u8868<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"4092\" data-end=\"4199\">\u5178\u578b\u7684\u55ae\u7dda\u5716\u70ba <strong data-start=\"4128\" data-end=\"4164\">500 kVA \u8b8a\u58d3\u5668\u5b89\u88dd<\/strong> \u5305\u62ec\u4ee5\u4e0b\u5143\u4ef6\u3002.<\/p>\n<h3 data-start=\"4201\" data-end=\"4236\"><span class=\"ez-toc-section\" id=\"1_Medium_Voltage_Utility_Supply\"><\/span>1.\u4e2d\u96fb\u58d3\u5e02\u96fb\u4f9b\u61c9<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"4238\" data-end=\"4327\">\u96fb\u529b\u7cfb\u7d71\u5f9e <strong data-start=\"4269\" data-end=\"4287\">\u516c\u7528\u4f9b\u6599\u5668<\/strong>, \u901a\u5e38\u5728 <strong data-start=\"4307\" data-end=\"4326\">12 kV \u548c 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.\u9ad8\u58d3\u65b7\u958b\u958b\u95dc<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"4367\" data-end=\"4465\">\u6b64\u88dd\u7f6e\u53ef\u8b93\u64cd\u4f5c\u54e1 <strong data-start=\"4399\" data-end=\"4464\">\u9694\u96e2\u8b8a\u58d3\u5668\u4ee5\u9032\u884c\u7dad\u8b77\u6216\u7dca\u6025\u505c\u6a5f<\/strong>.<\/p>\n<h3 data-start=\"4467\" data-end=\"4488\"><span class=\"ez-toc-section\" id=\"3_Surge_Arresters\"><\/span>3.\u907f\u96f7\u5668<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"4490\" data-end=\"4535\">\u907f\u96f7\u5668\u53ef\u4fdd\u8b77\u8b8a\u58d3\u5668\u4e0d\u53d7\u4ee5\u4e0b\u96fb\u6d41\u5f71\u97ff\uff1a<\/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\">\u96f7\u64ca<\/p>\n<\/li>\n<li data-start=\"4559\" data-end=\"4579\">\n<p data-start=\"4561\" data-end=\"4579\">\u958b\u95dc\u6d6a\u6e67<\/p>\n<\/li>\n<li data-start=\"4580\" data-end=\"4603\">\n<p data-start=\"4582\" data-end=\"4603\">\u77ac\u9593\u904e\u96fb\u58d3<\/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.\u9ad8\u58d3\u4fdd\u8b77<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"4636\" data-end=\"4667\">\u4fdd\u8b77\u88dd\u7f6e\u53ef\u5305\u62ec<\/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\">\u9650\u6d41\u4fdd\u96aa\u7d72<\/p>\n<\/li>\n<li data-start=\"4696\" data-end=\"4719\">\n<p data-start=\"4698\" data-end=\"4719\">\u8ca0\u8f09\u958b\u95dc<\/p>\n<\/li>\n<li data-start=\"4720\" data-end=\"4739\">\n<p data-start=\"4722\" data-end=\"4739\">\u4fdd\u8b77\u7e7c\u96fb\u5668<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"4741\" data-end=\"4766\"><span class=\"ez-toc-section\" id=\"5_500_kVA_Transformer\"><\/span>5.500 kVA \u8b8a\u58d3\u5668<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"4768\" data-end=\"4790\">\u5178\u578b\u898f\u683c\uff1a<\/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\">\u5bb9\u91cf\uff1a <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\">\u4e3b\u8981\u96fb\u58d3\uff1a <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\">\u4e8c\u6b21\u96fb\u58d3\uff1a <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\">\u9023\u63a5\uff1a <strong data-start=\"4897\" data-end=\"4910\">\u4e09\u89d2\u97cb<\/strong><\/p>\n<\/li>\n<li data-start=\"4911\" data-end=\"4933\">\n<p data-start=\"4913\" data-end=\"4933\">\u983b\u7387\uff1a <strong data-start=\"4924\" data-end=\"4933\">60 \u8d6b\u8332<\/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.\u63a5\u5730\u7cfb\u7d71<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"4959\" data-end=\"5094\">\u8b8a\u58d3\u5668\u4e2d\u6027\u9ede (X0) \u9023\u63a5\u5230 <strong data-start=\"5014\" data-end=\"5044\">\u63a5\u5730\u96fb\u6975\u7cfb\u7d71<\/strong>, \uff0c\u78ba\u4fdd\u96fb\u6c23\u5b89\u5168\u548c\u6545\u969c\u4fdd\u8b77\u3002.<\/p>\n<p data-start=\"4959\" data-end=\"5094\"><span style=\"font-size: 120%;\"><a href=\"https:\/\/yawei-powertransformer.com\/zh\/manufacturer\/500-kva-step-down-distribution-transformer-11kv-13-8kv-33kv-to-400v-480v\/\">\u95b1\u8b80\u5168\u6587\uff1a500 kVA \u964d\u58d3\u914d\u96fb\u8b8a\u58d3\u5668 11kV 13.8kV 33kV \u81f3 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.\u4f4e\u96fb\u58d3\u914d\u96fb\u76e4<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"5134\" data-end=\"5252\">\u5728\u8b8a\u58d3\u5668\u4e4b\u5f8c\uff0c\u96fb\u529b\u6d41\u5165 <strong data-start=\"5176\" data-end=\"5212\">\u4f4e\u96fb\u58d3\u914d\u96fb\u76e4\u6216\u9762\u677f<\/strong>, \uff0c\u901a\u904e\u5b83\u4f86\u5206\u914d\u96fb\u529b\uff1a<\/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\">\u65b7\u8def\u5668<\/p>\n<\/li>\n<li data-start=\"5275\" data-end=\"5300\">\n<p data-start=\"5277\" data-end=\"5300\">\u99ac\u9054\u63a7\u5236\u4e2d\u5fc3<\/p>\n<\/li>\n<li data-start=\"5301\" data-end=\"5320\">\n<p data-start=\"5303\" data-end=\"5320\">\u7167\u660e\u9762\u677f<\/p>\n<\/li>\n<li data-start=\"5321\" data-end=\"5337\">\n<p data-start=\"5323\" data-end=\"5337\">\u5efa\u7bc9\u7269\u8ca0\u8f09<\/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>\u5e38\u7528 500 kVA \u8b8a\u58d3\u5668\u7684\u5730\u65b9<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"5395\" data-end=\"5491\">A <strong data-start=\"5397\" data-end=\"5433\">500 kVA \u914d\u96fb\u8b8a\u58d3\u5668<\/strong> \u5ee3\u6cdb\u61c9\u7528\u65bc\u4e2d\u578b\u914d\u96fb\u7cfb\u7d71\u3002.<\/p>\n<h3 data-start=\"5493\" data-end=\"5517\"><span class=\"ez-toc-section\" id=\"Commercial_Buildings\"><\/span>\u5546\u696d\u5efa\u7bc9<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\">\u8fa6\u516c\u5927\u6a13<\/p>\n<\/li>\n<li data-start=\"5540\" data-end=\"5550\">\n<p data-start=\"5542\" data-end=\"5550\">\u98ef\u5e97<\/p>\n<\/li>\n<li data-start=\"5551\" data-end=\"5569\">\n<p data-start=\"5553\" data-end=\"5569\">\u8cfc\u7269\u5546\u5834<\/p>\n<\/li>\n<li data-start=\"5570\" data-end=\"5583\">\n<p data-start=\"5572\" data-end=\"5583\">\u91ab\u9662<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"5585\" data-end=\"5610\"><span class=\"ez-toc-section\" id=\"Industrial_Facilities\"><\/span>\u5de5\u696d\u8a2d\u65bd<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\">\u88fd\u9020\u5de5\u5ee0<\/p>\n<\/li>\n<li data-start=\"5637\" data-end=\"5651\">\n<p data-start=\"5639\" data-end=\"5651\">\u5009\u5eab<\/p>\n<\/li>\n<li data-start=\"5652\" data-end=\"5682\">\n<p data-start=\"5654\" data-end=\"5682\">\u98df\u54c1\u52a0\u5de5\u8a2d\u65bd<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"5684\" data-end=\"5711\"><span class=\"ez-toc-section\" id=\"Infrastructure_Projects\"><\/span>\u57fa\u790e\u5efa\u8a2d\u5c08\u6848<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\">\u516c\u7528\u4e8b\u696d\u914d\u96fb\u7db2\u8def<\/p>\n<\/li>\n<li data-start=\"5747\" data-end=\"5776\">\n<p data-start=\"5749\" data-end=\"5776\">\u53ef\u518d\u751f\u80fd\u6e90\u5c08\u6848<\/p>\n<\/li>\n<li data-start=\"5777\" data-end=\"5805\">\n<p data-start=\"5779\" data-end=\"5805\">\u5e02\u653f\u57fa\u790e\u8a2d\u65bd<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"5807\" data-end=\"5935\">\u7531\u65bc\u5176\u5e73\u8861\u5bb9\u91cf\uff0c500 kVA \u8b8a\u58d3\u5668\u53ef\u63d0\u4f9b <strong data-start=\"5872\" data-end=\"5934\">\u6709\u6548\u7387\u7684\u96fb\u6e90\u5206\u914d\uff0c\u4e0d\u6703\u9020\u6210\u7cfb\u7d71\u904e\u5927<\/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>\u7f8e\u570b\u4f7f\u7528\u7684\u8b8a\u58d3\u5668\u8a2d\u8a08\u6a19\u6e96<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"6008\" data-end=\"6096\">\u5728\u7f8e\u570b\u5b89\u88dd\u7684\u8b8a\u58d3\u5668\u5fc5\u9808\u7b26\u5408\u591a\u9805\u5de5\u696d\u6a19\u6e96\u3002.<\/p>\n<h3 data-start=\"6098\" data-end=\"6117\"><span class=\"ez-toc-section\" id=\"Major_Standards\"><\/span>\u4e3b\u8981\u6a19\u6e96<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\">ANSI C57 \u7cfb\u5217<\/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\">IEEE \u8b8a\u58d3\u5668\u6a19\u6e96<\/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\">DOE \u80fd\u6e90\u6548\u7387\u8981\u6c42<\/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\">NEMA \u8b8a\u58d3\u5668\u898f\u683c<\/strong><\/p>\n<\/li>\n<\/ul>\n<p data-start=\"6254\" data-end=\"6279\">\u9019\u4e9b\u6a19\u6e96\u898f\u7bc4<\/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\">\u6548\u7387\u7b49\u7d1a<\/p>\n<\/li>\n<li data-start=\"6303\" data-end=\"6330\">\n<p data-start=\"6305\" data-end=\"6330\">\u9694\u71b1\u8981\u6c42<\/p>\n<\/li>\n<li data-start=\"6331\" data-end=\"6353\">\n<p data-start=\"6333\" data-end=\"6353\">\u6e2c\u8a66\u7a0b\u5e8f<\/p>\n<\/li>\n<li data-start=\"6354\" data-end=\"6376\">\n<p data-start=\"6356\" data-end=\"6376\">\u5b89\u5168\u6027\u80fd<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"6378\" data-end=\"6478\">\u51fa\u53e3\u81f3\u7f8e\u570b\u5e02\u5834\u7684\u88fd\u9020\u5546\u5fc5\u9808\u78ba\u4fdd\u5176\u8b8a\u58d3\u5668\u7b26\u5408\u9019\u4e9b\u898f\u683c\u3002.<\/p>\n<h2 data-start=\"6490\" data-end=\"6546\"><span class=\"ez-toc-section\" id=\"500_kVA_Distribution_Transformers_from_Yawei_Transformer\"><\/span>\u4e9e\u5a01500kVA\u914d\u96fb\u8b8a\u58d3\u5668<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"6548\" data-end=\"6688\"><strong data-start=\"6548\" data-end=\"6569\">\u4e9e\u5a01\u8b8a\u58d3\u5668<\/strong> \u662f\u4e00\u5bb6\u5c08\u9580\u70ba\u570b\u969b\u5e02\u5834\u751f\u7522\u4e2d\u58d3\u8b8a\u58d3\u5668\u548c\u914d\u96fb\u8b8a\u58d3\u5668\u7684\u5c08\u696d\u88fd\u9020\u5546\u3002.<\/p>\n<p data-start=\"6690\" data-end=\"6724\"><strong>\u6211\u5011\u7684\u8b8a\u58d3\u5668\u89e3\u6c7a\u65b9\u6848\u5305\u62ec<\/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\">500 kVA \u896f\u588a\u5f0f\u8b8a\u58d3\u5668<\/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\/zh\/Wholesale\/distribution-transformers\/\"><strong data-start=\"6767\" data-end=\"6809\">\u6cb9\u6d78\u5f0f\u914d\u96fb\u8b8a\u58d3\u5668<\/strong><\/a><\/p>\n<\/li>\n<li data-start=\"6765\" data-end=\"6809\"><a href=\"https:\/\/yawei-powertransformer.com\/zh\/manufacturer\/500-kva-dry-type-cast-resin-transformer-three-phase-power-transformer-480v-400v-230v-11kv-13-2kv-15kv-20kv\/\"><strong>500 KVA \u4e7e\u5f0f\u8b8a\u58d3\u5668<\/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\/zh\/Wholesale\/substation-transformers\/\"><strong data-start=\"6812\" data-end=\"6839\">\u8b8a\u96fb\u7ad9\u8b8a\u58d3\u5668<\/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\">\u81ea\u8a02\u96fb\u58d3\u914d\u7f6e<\/strong><\/p>\n<\/li>\n<\/ul>\n<p data-start=\"6877\" data-end=\"6915\"><strong>\u5178\u578b\u7684\u51fa\u53e3\u898f\u683c\u5305\u62ec<\/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\">\u4e3b\u8981\u96fb\u58d3\uff1a <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\">\u4e8c\u6b21\u96fb\u58d3\uff1a <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\">\u983b\u7387\uff1a <strong data-start=\"7039\" data-end=\"7048\">60 \u8d6b\u8332<\/strong><\/p>\n<\/li>\n<li data-start=\"7049\" data-end=\"7073\">\n<p data-start=\"7051\" data-end=\"7073\">\u51b7\u537b\u985e\u578b\uff1a <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\">\u6a19\u6e96\uff1a <strong data-start=\"7087\" data-end=\"7119\">ANSI \/ IEEE \/ DOE \u6548\u7387<\/strong><\/p>\n<\/li>\n<\/ul>\n<p data-start=\"7121\" data-end=\"7322\">\u6191\u85c9\u5148\u9032\u7684\u751f\u7522\u8a2d\u5099\u548c\u56b4\u683c\u7684\u54c1\u8cea\u63a7\u5236\uff0c\u4e9e\u5a01\u8b8a\u58d3\u5668\u70ba\u5168\u7403\u516c\u7528\u4e8b\u696d\u3001EPC\u627f\u5305\u5546\u548c\u5de5\u696d\u96fb\u529b\u9805\u76ee\u63d0\u4f9b\u53ef\u9760\u7684\u8b8a\u58d3\u5668\u89e3\u6c7a\u65b9\u6848\u3002.<\/p>\n<h2 data-start=\"7334\" data-end=\"7366\"><span class=\"ez-toc-section\" id=\"Frequently_Asked_Questions_FAQ\"><\/span>\u5e38\u898b\u554f\u984c (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>\u4ec0\u9ebc\u662f\u8b8a\u58d3\u5668\u55ae\u7dda\u5716?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"7412\" data-end=\"7631\">\u8b8a\u58d3\u5668\u55ae\u7dda\u5716\u662f\u4f7f\u7528\u55ae\u7dda\u8868\u793a\u4e09\u76f8\u96fb\u529b\u7cfb\u7d71\u7684\u7c21\u5316\u96fb\u6c23\u7e6a\u5716\u3002\u5b83\u986f\u793a\u4e86\u8b8a\u58d3\u5668\u3001\u958b\u95dc\u8a2d\u5099\u3001\u4fdd\u8b77\u88dd\u7f6e\u548c\u8ca0\u8f09\u4e4b\u9593\u7684\u9023\u63a5\u3002.<\/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>\u7f8e\u570b 500 kVA \u8b8a\u58d3\u5668\u7684\u5178\u578b\u96fb\u58d3\u662f\u591a\u5c11\uff1f<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"7714\" data-end=\"7746\">\u5178\u578b\u7684\u984d\u5b9a\u96fb\u58d3\u5305\u62ec<\/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\">\u521d\u7d1a\uff1a <strong data-start=\"7759\" data-end=\"7782\">12.47 kV \u6216 13.2 kV<\/strong><\/p>\n<\/li>\n<li data-start=\"7783\" data-end=\"7810\">\n<p data-start=\"7785\" data-end=\"7810\">\u4e2d\u5b78\uff1a <strong data-start=\"7796\" data-end=\"7810\">480Y\/277 V<\/strong><\/p>\n<\/li>\n<\/ul>\n<p data-start=\"7812\" data-end=\"7886\">\u6b64\u914d\u7f6e\u5ee3\u6cdb\u7528\u65bc\u5546\u696d\u548c\u5de5\u696d\u8a2d\u65bd\u3002.<\/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>\u8b8a\u58d3\u5668\u4e2d\u7684 Delta-Wye \u662f\u4ec0\u9ebc\u610f\u601d\uff1f<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"7940\" data-end=\"8141\">Delta-Wye \u6307\u7684\u662f\u8b8a\u58d3\u5668\u7684\u7e5e\u7d44\u914d\u7f6e\uff0c\u5176\u4e2d\u539f\u908a\u4f7f\u7528\u4e00\u500b <strong data-start=\"8028\" data-end=\"8048\">\u4e09\u89d2\u6d32\u9023\u63a5<\/strong> \u800c\u526f\u908a\u5247\u4f7f\u7528 <strong data-start=\"8079\" data-end=\"8104\">\u532f\u6d41\uff08\u661f\u5f62\uff09\u9023\u63a5<\/strong>, \u63d0\u4f9b\u63a5\u5730\u7684\u4e2d\u6027\u9ede\u3002.<\/p>\n<h3 data-start=\"8148\" data-end=\"8188\"><span class=\"ez-toc-section\" id=\"Is_500_kVA_a_common_transformer_size\"><\/span>500 kVA \u662f\u5e38\u898b\u7684\u8b8a\u58d3\u5668\u898f\u683c\u55ce\uff1f<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"8190\" data-end=\"8321\">\u662f\u7684\u3002500 kVA \u8b8a\u58d3\u5668\u662f\u4e2d\u578b\u5546\u696d\u5efa\u7bc9\u3001\u5de5\u5ee0\u548c\u516c\u7528\u914d\u96fb\u7db2\u8def\u5e38\u7528\u7684\u8b8a\u58d3\u5668\u898f\u683c\u3002.<\/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=\"\/zh\/wp-json\/wp\/v2\/posts\/2143#wpcf7-f280-o1\" method=\"post\" class=\"wpcf7-form init\" aria-label=\"\u806f\u7d61\u8868\u683c\" 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value=\"bot\" \/><svg aria-hidden=\"true\" role=\"img\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 576 512\"><path fill=\"currentColor\" d=\"M488 313v143c0 13-11 24-24 24H348c-7 0-12-5-12-12V356c0-7-5-12-12-12h-72c-7 0-12 5-12 12v112c0 7-5 12-12 12H112c-13 0-24-11-24-24V313c0-4 2-7 4-10l188-154c5-4 11-4 16 0l188 154c2 3 4 6 4 10zm84-61l-84-69V44c0-6-5-12-12-12h-56c-7 0-12 6-12 12v73l-89-74a48 48 0 00-61 0L4 252c-5 4-5 12-1 17l25 31c5 5 12 5 17 1l235-193c5-4 11-4 16 0l235 193c5 5 13 4 17-1l25-31c4-6 4-13-1-17z\"\/><\/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 0 576 512\"><path fill=\"currentColor\" d=\"M259 18l-65 132-146 22c-26 3-37 36-18 54l106 103-25 146c-5 26 23 46 46 33l131-68 131 68c23 13 51-7 46-33l-25-146 106-103c19-18 8-51-18-54l-146-22-65-132a32 32 0 00-58 0z\"\/><\/svg><\/label><label><input aria-label=\"3\" 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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\/zh\/500-kva-transformer-unifilar-diagram-explained-for-united-states-electrical-systems\/\" \/>\n<meta property=\"og:locale\" content=\"zh_HK\" \/>\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\/zh\/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=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"Yawei Transformer\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9810\u8a08\u95b1\u8b80\u6642\u9593\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 \u5206\u9418\" \/>\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. 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