{"id":2155,"date":"2026-03-13T08:48:55","date_gmt":"2026-03-13T08:48:55","guid":{"rendered":"https:\/\/yawei-powertransformer.com\/?p=2155"},"modified":"2026-03-13T08:55:44","modified_gmt":"2026-03-13T08:55:44","slug":"how-to-calculate-transformer-size-kva-complete-guide-for-industrial-and-commercial-power-systems","status":"publish","type":"post","link":"https:\/\/yawei-powertransformer.com\/zh\/how-to-calculate-transformer-size-kva-complete-guide-for-industrial-and-commercial-power-systems\/","title":{"rendered":"\u5982\u4f55\u8a08\u7b97\u8b8a\u58d3\u5668\u5c3a\u5bf8 (kVA)\uff1a\u5de5\u696d\u548c\u5546\u696d\u96fb\u529b\u7cfb\u7d71\u5b8c\u6574\u6307\u5357"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 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' ><ul class='ez-toc-list-level-2' ><li class='ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/yawei-powertransformer.com\/zh\/how-to-calculate-transformer-size-kva-complete-guide-for-industrial-and-commercial-power-systems\/#Introduction\" >\u7c21\u4ecb<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/yawei-powertransformer.com\/zh\/how-to-calculate-transformer-size-kva-complete-guide-for-industrial-and-commercial-power-systems\/#What_Is_Transformer_kVA_Rating\" >\u4ec0\u9ebc\u662f\u8b8a\u58d3\u5668 kVA \u984d\u5b9a\u503c\uff1f<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/yawei-powertransformer.com\/zh\/how-to-calculate-transformer-size-kva-complete-guide-for-industrial-and-commercial-power-systems\/#Power_Formula\" >\u52d5\u529b\u516c\u5f0f<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/yawei-powertransformer.com\/zh\/how-to-calculate-transformer-size-kva-complete-guide-for-industrial-and-commercial-power-systems\/#Basic_Transformer_Sizing_Formula\" >\u57fa\u672c\u8b8a\u58d3\u5668\u898f\u683c\u516c\u5f0f<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/yawei-powertransformer.com\/zh\/how-to-calculate-transformer-size-kva-complete-guide-for-industrial-and-commercial-power-systems\/#Single-Phase_Transformer_Formula\" >\u55ae\u76f8\u8b8a\u58d3\u5668\u516c\u5f0f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/yawei-powertransformer.com\/zh\/how-to-calculate-transformer-size-kva-complete-guide-for-industrial-and-commercial-power-systems\/#Three-Phase_Transformer_Formula\" >\u4e09\u76f8\u8b8a\u58d3\u5668\u516c\u5f0f<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/yawei-powertransformer.com\/zh\/how-to-calculate-transformer-size-kva-complete-guide-for-industrial-and-commercial-power-systems\/#Example_Industrial_Transformer_Sizing_Calculation\" >\u7bc4\u4f8b\uff1a\u5de5\u696d\u8b8a\u58d3\u5668\u898f\u683c\u8a08\u7b97<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><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\/how-to-calculate-transformer-size-kva-complete-guide-for-industrial-and-commercial-power-systems\/#Industrial_Facility_Load\" >\u5de5\u696d\u8a2d\u65bd\u8ca0\u8f09<\/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\/how-to-calculate-transformer-size-kva-complete-guide-for-industrial-and-commercial-power-systems\/#Transformer_Capacity_Calculation\" >\u8b8a\u58d3\u5668\u5bb9\u91cf\u8a08\u7b97<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/yawei-powertransformer.com\/zh\/how-to-calculate-transformer-size-kva-complete-guide-for-industrial-and-commercial-power-systems\/#Standard_Transformer_Sizes_Used_in_Industry\" >\u5de5\u696d\u4e0a\u4f7f\u7528\u7684\u6a19\u6e96\u8b8a\u58d3\u5668\u5c3a\u5bf8<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/yawei-powertransformer.com\/zh\/how-to-calculate-transformer-size-kva-complete-guide-for-industrial-and-commercial-power-systems\/#Transformer_Oversizing_vs_Undersizing\" >\u8b8a\u58d3\u5668\u904e\u5927\u8207\u904e\u5c0f\u7684\u6bd4\u8f03<\/a><ul class='ez-toc-list-level-2' ><li class='ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/yawei-powertransformer.com\/zh\/how-to-calculate-transformer-size-kva-complete-guide-for-industrial-and-commercial-power-systems\/#Undersized_Transformer_Risks\" >\u8b8a\u58d3\u5668\u5c3a\u5bf8\u4e0d\u8db3\u7684\u98a8\u96aa<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/yawei-powertransformer.com\/zh\/how-to-calculate-transformer-size-kva-complete-guide-for-industrial-and-commercial-power-systems\/#Oversized_Transformer_Problems\" >\u8d85\u5927\u8b8a\u58d3\u5668\u554f\u984c<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/yawei-powertransformer.com\/zh\/how-to-calculate-transformer-size-kva-complete-guide-for-industrial-and-commercial-power-systems\/#Factors_That_Affect_Transformer_Capacity_Selection\" >\u5f71\u97ff\u8b8a\u58d3\u5668\u5bb9\u91cf\u9078\u64c7\u7684\u56e0\u7d20<\/a><ul class='ez-toc-list-level-2' ><li class='ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/yawei-powertransformer.com\/zh\/how-to-calculate-transformer-size-kva-complete-guide-for-industrial-and-commercial-power-systems\/#1_Load_Type\" >1.\u8ca0\u8f09\u985e\u578b<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/yawei-powertransformer.com\/zh\/how-to-calculate-transformer-size-kva-complete-guide-for-industrial-and-commercial-power-systems\/#2_Future_Expansion\" >2.\u672a\u4f86\u64f4\u5c55<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/yawei-powertransformer.com\/zh\/how-to-calculate-transformer-size-kva-complete-guide-for-industrial-and-commercial-power-systems\/#3_Ambient_Temperature\" >3.\u74b0\u5883\u6eab\u5ea6<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/yawei-powertransformer.com\/zh\/how-to-calculate-transformer-size-kva-complete-guide-for-industrial-and-commercial-power-systems\/#4_Harmonic_Loads\" >4.\u8ae7\u6ce2\u8ca0\u8f09<\/a><\/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\/how-to-calculate-transformer-size-kva-complete-guide-for-industrial-and-commercial-power-systems\/#5_Duty_Cycle\" >5.\u5de5\u4f5c\u9031\u671f<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/yawei-powertransformer.com\/zh\/how-to-calculate-transformer-size-kva-complete-guide-for-industrial-and-commercial-power-systems\/#Choosing_the_Right_Transformer_Type\" >\u9078\u64c7\u6b63\u78ba\u7684\u8b8a\u58d3\u5668\u985e\u578b<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/yawei-powertransformer.com\/zh\/how-to-calculate-transformer-size-kva-complete-guide-for-industrial-and-commercial-power-systems\/#Pad-Mounted_Transformers\" >\u588a\u88dd\u5f0f\u8b8a\u58d3\u5668<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/yawei-powertransformer.com\/zh\/how-to-calculate-transformer-size-kva-complete-guide-for-industrial-and-commercial-power-systems\/#Pole-Mounted_Transformers\" >\u67f1\u4e0a\u8b8a\u58d3\u5668<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/yawei-powertransformer.com\/zh\/how-to-calculate-transformer-size-kva-complete-guide-for-industrial-and-commercial-power-systems\/#Substation_Transformers\" >\u8b8a\u96fb\u7ad9\u8b8a\u58d3\u5668<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/yawei-powertransformer.com\/zh\/how-to-calculate-transformer-size-kva-complete-guide-for-industrial-and-commercial-power-systems\/#Typical_Transformer_Voltage_Combinations\" >\u5178\u578b\u7684\u8b8a\u58d3\u5668\u96fb\u58d3\u7d44\u5408<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/yawei-powertransformer.com\/zh\/how-to-calculate-transformer-size-kva-complete-guide-for-industrial-and-commercial-power-systems\/#Best_Practices_for_Transformer_Selection\" >\u8b8a\u58d3\u5668\u9078\u64c7\u7684\u6700\u4f73\u5be6\u52d9<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/yawei-powertransformer.com\/zh\/how-to-calculate-transformer-size-kva-complete-guide-for-industrial-and-commercial-power-systems\/#Conclusion\" >\u7e3d\u7d50<\/a><\/li><\/ul><\/nav><\/div>\n<h2 data-section-id=\"13ax1s5\" data-start=\"192\" data-end=\"207\"><span class=\"ez-toc-section\" id=\"Introduction\"><\/span>\u7c21\u4ecb<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"209\" data-end=\"510\">\u9078\u64c7\u6b63\u78ba\u7684\u8b8a\u58d3\u5668\u5c3a\u5bf8\u662f\u96fb\u529b\u7cfb\u7d71\u8a2d\u8a08\u4e2d\u6700\u91cd\u8981\u7684\u6c7a\u7b56\u4e4b\u4e00\u3002\u904e\u5c0f\u7684\u8b8a\u58d3\u5668\u53ef\u80fd\u6703\u5c0e\u81f4\u904e\u71b1\u3001\u96fb\u58d3\u4e0b\u964d\u548c\u8a2d\u5099\u6545\u969c\uff0c\u800c\u904e\u5927\u7684\u8b8a\u58d3\u5668\u53ef\u80fd\u6703\u5c0e\u81f4\u4e0d\u5fc5\u8981\u7684\u6295\u8cc7\u6210\u672c\u548c\u66f4\u9ad8\u7684\u7a7a\u8f09\u640d\u8017\u3002.<\/p>\n<p data-start=\"512\" data-end=\"701\">\u5c0d\u65bc\u5de5\u7a0b\u5e2b\u3001\u627f\u5305\u5546\u548c\u5de5\u696d\u8a2d\u65bd\u7d93\u7406\u800c\u8a00\uff0c\u77ad\u89e3 <strong data-start=\"588\" data-end=\"635\">\u5982\u4f55\u8a08\u7b97\u8b8a\u58d3\u5668\u5bb9\u91cf (kVA)<\/strong> \u5c0d\u65bc\u78ba\u4fdd\u53ef\u9760\u4e14\u6709\u6548\u7387\u7684\u914d\u96fb\u800c\u8a00\uff0c\u9019\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002.<\/p>\n<p data-start=\"703\" data-end=\"878\">\u5728\u672c\u6307\u5357\u4e2d\uff0c\u6211\u5011\u5c07\u4ecb\u7d39 <strong data-start=\"733\" data-end=\"829\">\u8b8a\u58d3\u5668\u898f\u683c\u516c\u5f0f\u3001\u8a08\u7b97\u65b9\u6cd5\u3001\u5be6\u4f8b\u53ca\u5be6\u969b\u8003\u91cf<\/strong> \u7528\u65bc\u5de5\u696d\u548c\u5546\u696d\u96fb\u529b\u7cfb\u7d71\u3002.<\/p>\n<hr data-start=\"880\" data-end=\"883\" \/>\n<h1 data-section-id=\"1kf66y1\" data-start=\"885\" data-end=\"918\"><span class=\"ez-toc-section\" id=\"What_Is_Transformer_kVA_Rating\"><\/span>\u4ec0\u9ebc\u662f\u8b8a\u58d3\u5668 kVA \u984d\u5b9a\u503c\uff1f<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p data-start=\"920\" data-end=\"1017\">\u8b8a\u58d3\u5668\u7684\u5bb9\u91cf\u901a\u5e38\u4ee5\u4e0b\u5217\u55ae\u4f4d\u8868\u793a <strong data-start=\"976\" data-end=\"1001\">kVA (\u5343\u4f0f\u5b89)<\/strong> \u800c\u4e0d\u662f kW\u3002.<\/p>\n<p data-start=\"1019\" data-end=\"1096\">\u9019\u662f\u56e0\u70ba\u8b8a\u58d3\u5668\u63d0\u4f9b <strong data-start=\"1056\" data-end=\"1074\">\u8868\u9762\u529f\u7387<\/strong>, \u5176\u4e2d\u5305\u62ec\u5169\u8005\uff1a<\/p>\n<ul data-start=\"1098\" data-end=\"1239\">\n<li data-section-id=\"6ele9r\" data-start=\"1098\" data-end=\"1158\">\n<p data-start=\"1100\" data-end=\"1158\"><strong data-start=\"1100\" data-end=\"1121\">\u6709\u529f\u529f\u7387 (kW)<\/strong> - \u8a2d\u5099\u4f7f\u7528\u7684\u5be6\u969b\u529f\u7387<\/p>\n<\/li>\n<li data-section-id=\"1vx48s4\" data-start=\"1159\" data-end=\"1239\">\n<p data-start=\"1161\" data-end=\"1239\"><strong data-start=\"1161\" data-end=\"1186\">\u7121\u529f\u529f\u7387 (kVAR)<\/strong> - \u96fb\u611f\u6027\u8ca0\u8f09\uff08\u5982\u99ac\u9054\uff09\u6240\u9700\u7684\u529f\u7387<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"1241\" data-end=\"1314\">\u5b83\u5011\u4e4b\u9593\u7684\u95dc\u4fc2\u7531 <strong data-start=\"1292\" data-end=\"1313\">\u529f\u7387\u56e0\u7d20 (PF)<\/strong>.<\/p>\n<h3 data-section-id=\"1utk5tj\" data-start=\"1316\" data-end=\"1333\"><span class=\"ez-toc-section\" id=\"Power_Formula\"><\/span>\u52d5\u529b\u516c\u5f0f<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"1335\" data-end=\"1358\">kVA = kW \u00f7 \u529f\u7387\u56e0\u6578<\/p>\n<p data-start=\"1360\" data-end=\"1372\">\u4f8b\u5982\uff1a<\/p>\n<ul data-start=\"1374\" data-end=\"1414\">\n<li data-section-id=\"h728ke\" data-start=\"1374\" data-end=\"1391\">\n<p data-start=\"1376\" data-end=\"1391\">\u8ca0\u8f09 = 100 kW<\/p>\n<\/li>\n<li data-section-id=\"9ij535\" data-start=\"1392\" data-end=\"1414\">\n<p data-start=\"1394\" data-end=\"1414\">\u529f\u7387\u56e0\u7d20 = 0.8<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"1416\" data-end=\"1442\">\u6240\u9700\u8b8a\u58d3\u5668\u5c3a\u5bf8\uff1a<\/p>\n<p data-start=\"1444\" data-end=\"1473\"><strong data-start=\"1444\" data-end=\"1473\">kVA = 100 \u00f7 0.8 = 125 kVA<\/strong><\/p>\n<p data-start=\"1475\" data-end=\"1575\">\u5be6\u969b\u4e0a\uff0c\u5de5\u7a0b\u5e2b\u901a\u5e38\u9078\u64c7 <strong data-start=\"1517\" data-end=\"1553\">\u4e0b\u4e00\u500b\u6a19\u6e96\u8b8a\u58d3\u5668\u984d\u5b9a\u503c<\/strong>, \u4f8b\u5982 <a href=\"https:\/\/yawei-powertransformer.com\/zh\/manufacturer\/150-kva-single-phase-pole-mounted-transformer-13-8-kv-to-120-240-v-onan-telephone-power-distribution-transformer\/\"><strong data-start=\"1563\" data-end=\"1574\">150 kVA<\/strong><\/a>.<\/p>\n<hr data-start=\"1577\" data-end=\"1580\" \/>\n<h1 data-section-id=\"hxvu6h\" data-start=\"1582\" data-end=\"1616\"><span class=\"ez-toc-section\" id=\"Basic_Transformer_Sizing_Formula\"><\/span>\u57fa\u672c\u8b8a\u58d3\u5668\u898f\u683c\u516c\u5f0f<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p data-start=\"1618\" data-end=\"1692\">\u8b8a\u58d3\u5668\u5bb9\u91cf\u4e5f\u53ef\u4ee5\u4f7f\u7528\u96fb\u58d3\u548c\u96fb\u6d41\u4f86\u8a08\u7b97\u3002.<\/p>\n<h3 data-section-id=\"ominnv\" data-start=\"1694\" data-end=\"1730\"><span class=\"ez-toc-section\" id=\"Single-Phase_Transformer_Formula\"><\/span>\u55ae\u76f8\u8b8a\u58d3\u5668\u516c\u5f0f<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"1732\" data-end=\"1764\">kVA = (\u96fb\u58d3 \u00d7 \u96fb\u6d41) \u00f7 1000<\/p>\n<p data-start=\"1766\" data-end=\"1774\">\u7bc4\u4f8b\uff1a<\/p>\n<p data-start=\"1776\" data-end=\"1809\">\u96fb\u58d3 = 240 V<br data-start=\"1791\" data-end=\"1794\" \/>\u96fb\u6d41 = 100 A<\/p>\n<p data-start=\"1811\" data-end=\"1854\">kVA = (240 \u00d7 100) \u00f7 1000<br data-start=\"1835\" data-end=\"1838\" \/>kVA = <strong data-start=\"1844\" data-end=\"1854\">24 kVA<\/strong><\/p>\n<hr data-start=\"1856\" data-end=\"1859\" \/>\n<h3 data-section-id=\"dpvchr\" data-start=\"1861\" data-end=\"1896\"><span class=\"ez-toc-section\" id=\"Three-Phase_Transformer_Formula\"><\/span>\u4e09\u76f8\u8b8a\u58d3\u5668\u516c\u5f0f<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"1898\" data-end=\"1965\">\u5c0d\u65bc\u5de5\u696d\u7cfb\u7d71\uff0c\u901a\u5e38\u4f7f\u7528\u4e09\u76f8\u8b8a\u58d3\u5668\u3002.<\/p>\n<p data-start=\"1967\" data-end=\"2004\">kVA = (\u221a3 \u00d7 \u96fb\u58d3 \u00d7 \u96fb\u6d41) \u00f7 1000<\/p>\n<p data-start=\"2006\" data-end=\"2014\">\u7bc4\u4f8b\uff1a<\/p>\n<p data-start=\"2016\" data-end=\"2049\">\u96fb\u58d3 = 480 V<br data-start=\"2031\" data-end=\"2034\" \/>\u96fb\u6d41 = 120 A<\/p>\n<p data-start=\"2051\" data-end=\"2104\">kVA = (1.732 \u00d7 480 \u00d7 120) \u00f7 1000<br data-start=\"2083\" data-end=\"2086\" \/>kVA \u2248 <strong data-start=\"2092\" data-end=\"2104\">99.8 kVA<\/strong><\/p>\n<p data-start=\"2106\" data-end=\"2171\">\u56e0\u6b64\uff0c\u4e00\u500b <strong data-start=\"2119\" data-end=\"2142\">100 kVA \u8b8a\u58d3\u5668<\/strong> \u901a\u5e38\u6703\u88ab\u9078\u4e2d\u3002.<\/p>\n<hr data-start=\"2173\" data-end=\"2176\" \/>\n<h1 data-section-id=\"1lrad0h\" data-start=\"2178\" data-end=\"2230\"><span class=\"ez-toc-section\" id=\"Example_Industrial_Transformer_Sizing_Calculation\"><\/span>\u7bc4\u4f8b\uff1a\u5de5\u696d\u8b8a\u58d3\u5668\u898f\u683c\u8a08\u7b97<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p data-start=\"2232\" data-end=\"2266\">\u8b93\u6211\u5011\u4f86\u770b\u770b\u4e00\u500b\u5be6\u4f8b\u3002.<\/p>\n<h3 data-section-id=\"ixwew2\" data-start=\"2268\" data-end=\"2296\"><span class=\"ez-toc-section\" id=\"Industrial_Facility_Load\"><\/span>\u5de5\u696d\u8a2d\u65bd\u8ca0\u8f09<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"2298\" data-end=\"2319\">\u7e3d\u9023\u63a5\u8ca0\u8f09\uff1a<\/p>\n<table style=\"border-collapse: collapse; width: 100%;\">\n<tbody>\n<tr style=\"height: 25.00pt;\">\n<th class=\"et2\" style=\"height: 25pt; width: 60.1942%;\" width=\"148\" height=\"33\">\u8a2d\u5099<\/th>\n<th class=\"et2\" style=\"width: 39.6117%;\" width=\"96\">\u96fb\u6e90<\/th>\n<\/tr>\n<tr style=\"height: 25.00pt;\">\n<td class=\"et3\" style=\"height: 25pt; width: 60.1942%;\" width=\"148\" height=\"33\">\u99ac\u9054<\/td>\n<td class=\"et3\" style=\"width: 39.6117%;\" width=\"96\">80 \u5343\u74e6<\/td>\n<\/tr>\n<tr style=\"height: 25.00pt;\">\n<td class=\"et3\" style=\"height: 25pt; width: 60.1942%;\" width=\"148\" height=\"33\">\u7167\u660e<\/td>\n<td class=\"et3\" style=\"width: 39.6117%;\" width=\"96\">20 \u5343\u74e6<\/td>\n<\/tr>\n<tr style=\"height: 25.00pt;\">\n<td class=\"et3\" style=\"height: 25pt; width: 60.1942%;\" width=\"148\" height=\"33\">HVAC<\/td>\n<td class=\"et3\" style=\"width: 39.6117%;\" width=\"96\">40 \u5343\u74e6<\/td>\n<\/tr>\n<tr style=\"height: 25.00pt;\">\n<td class=\"et3\" style=\"height: 25pt; width: 60.1942%;\" width=\"148\" height=\"33\">\u8a2d\u5099<\/td>\n<td class=\"et3\" style=\"width: 39.6117%;\" width=\"96\">30 \u5343\u74e6<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p data-start=\"2444\" data-end=\"2455\">\u7e3d\u8ca0\u8f09\uff1a<\/p>\n<p data-start=\"2457\" data-end=\"2467\"><strong data-start=\"2457\" data-end=\"2467\">170 \u5343\u74e6<\/strong><\/p>\n<p data-start=\"2469\" data-end=\"2497\">\u5047\u8a2d\u5e73\u5747\u529f\u7387\u56e0\u7d20\uff1a<\/p>\n<p data-start=\"2499\" data-end=\"2511\"><strong data-start=\"2499\" data-end=\"2511\">PF = 0.9<\/strong><\/p>\n<h3 data-section-id=\"e1ifi8\" data-start=\"2513\" data-end=\"2549\"><span class=\"ez-toc-section\" id=\"Transformer_Capacity_Calculation\"><\/span>\u8b8a\u58d3\u5668\u5bb9\u91cf\u8a08\u7b97<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"2551\" data-end=\"2588\">kVA = 170 \u00f7 0.9<br data-start=\"2566\" data-end=\"2569\" \/>kVA = <strong data-start=\"2575\" data-end=\"2588\">188.9 kVA<\/strong><\/p>\n<p data-start=\"2590\" data-end=\"2641\">\u5de5\u7a0b\u5e2b\u901a\u5e38\u6703\u5c07 <strong data-start=\"2616\" data-end=\"2640\">20-25% \u5b89\u5168\u9918\u91cf<\/strong>.<\/p>\n<p data-start=\"2643\" data-end=\"2672\">\u5efa\u8b70\u7684\u8b8a\u58d3\u5668\u5c3a\u5bf8\uff1a<\/p>\n<p data-start=\"2674\" data-end=\"2685\"><strong data-start=\"2674\" data-end=\"2685\">250 kVA<\/strong><\/p>\n<p data-start=\"2687\" data-end=\"2708\">\u9019\u53ef\u8b93\u7a7a\u9593<\/p>\n<ul data-start=\"2710\" data-end=\"2779\">\n<li data-section-id=\"n1w2em\" data-start=\"2710\" data-end=\"2730\">\n<p data-start=\"2712\" data-end=\"2730\">\u8ca0\u8f09\u6ce2\u52d5<\/p>\n<\/li>\n<li data-section-id=\"18pevce\" data-start=\"2731\" data-end=\"2760\">\n<p data-start=\"2733\" data-end=\"2760\">\u8a2d\u5099\u555f\u52d5\u96fb\u6d41<\/p>\n<\/li>\n<li data-section-id=\"163ytjo\" data-start=\"2761\" data-end=\"2779\">\n<p data-start=\"2763\" data-end=\"2779\">\u672a\u4f86\u64f4\u5c55<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"2781\" data-end=\"2784\" \/>\n<h1 data-section-id=\"e4dlca\" data-start=\"2786\" data-end=\"2831\"><span class=\"ez-toc-section\" id=\"Standard_Transformer_Sizes_Used_in_Industry\"><\/span>\u5de5\u696d\u4e0a\u4f7f\u7528\u7684\u6a19\u6e96\u8b8a\u58d3\u5668\u5c3a\u5bf8<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p data-start=\"2833\" data-end=\"2889\">\u5927\u591a\u6578\u88fd\u9020\u5546\u63d0\u4f9b\u6a19\u6e96\u7684\u8b8a\u58d3\u5668\u984d\u5b9a\u503c\u3002.<\/p>\n<p data-start=\"2891\" data-end=\"2938\">\u5178\u578b\u7684\u914d\u96fb\u8b8a\u58d3\u5668\u5c3a\u5bf8\u5305\u62ec<\/p>\n<table style=\"border-collapse: collapse; width: 100%;\">\n<tbody>\n<tr style=\"height: 25.00pt;\">\n<th class=\"et2\" style=\"height: 25pt; width: 48.7379%;\" width=\"272\" height=\"33\">\u61c9\u7528<\/th>\n<th class=\"et2\" style=\"width: 51.068%;\" width=\"284\">\u5178\u578b\u8b8a\u58d3\u5668\u5c3a\u5bf8<\/th>\n<\/tr>\n<tr style=\"height: 25.00pt;\">\n<td class=\"et3\" style=\"height: 25pt; width: 48.7379%;\" width=\"272\" height=\"33\">\u5c0f\u578b\u5546\u696d\u5efa\u7bc9<\/td>\n<td class=\"et3\" style=\"width: 51.068%;\" width=\"284\">45 - 75 kVA<\/td>\n<\/tr>\n<tr style=\"height: 25.00pt;\">\n<td class=\"et3\" style=\"height: 25pt; width: 48.7379%;\" width=\"272\" height=\"33\">\u96f6\u552e\u5e97<\/td>\n<td class=\"et3\" style=\"width: 51.068%;\" width=\"284\">75 - 150 kVA<\/td>\n<\/tr>\n<tr style=\"height: 25.00pt;\">\n<td class=\"et3\" style=\"height: 25pt; width: 48.7379%;\" width=\"272\" height=\"33\">\u4e2d\u578b\u5546\u696d\u8a2d\u65bd<\/td>\n<td class=\"et3\" style=\"width: 51.068%;\" width=\"284\">150 - 300 kVA<\/td>\n<\/tr>\n<tr style=\"height: 25.00pt;\">\n<td class=\"et3\" style=\"height: 25pt; width: 48.7379%;\" width=\"272\" height=\"33\">\u5de5\u696d\u5ee0\u623f<\/td>\n<td class=\"et3\" style=\"width: 51.068%;\" width=\"284\">300 - 1000 kVA<\/td>\n<\/tr>\n<tr style=\"height: 25.00pt;\">\n<td class=\"et3\" style=\"height: 25pt; width: 48.7379%;\" width=\"272\" height=\"33\">\u5927\u578b\u5de5\u696d\u7cfb\u7d71<\/td>\n<td class=\"et3\" style=\"width: 51.068%;\" width=\"284\">1000 kVA - 5000 kVA<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p data-start=\"3239\" data-end=\"3327\">\u9078\u64c7\u6b63\u78ba\u7684\u984d\u5b9a\u503c\u53ef\u78ba\u4fdd <strong data-start=\"3275\" data-end=\"3326\">\u9ad8\u6548\u7387\u904b\u4f5c\uff0c\u8b8a\u58d3\u5668\u58fd\u547d\u66f4\u9577<\/strong>.<\/p>\n<hr data-start=\"3329\" data-end=\"3332\" \/>\n<h1 data-section-id=\"94r7b2\" data-start=\"3334\" data-end=\"3373\"><span class=\"ez-toc-section\" id=\"Transformer_Oversizing_vs_Undersizing\"><\/span>\u8b8a\u58d3\u5668\u904e\u5927\u8207\u904e\u5c0f\u7684\u6bd4\u8f03<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<h2 data-section-id=\"1ez2hmv\" data-start=\"3375\" data-end=\"3406\"><span class=\"ez-toc-section\" id=\"Undersized_Transformer_Risks\"><\/span>\u8b8a\u58d3\u5668\u5c3a\u5bf8\u4e0d\u8db3\u7684\u98a8\u96aa<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"3408\" data-end=\"3449\">\u5982\u679c\u8b8a\u58d3\u5668\u5bb9\u91cf\u592a\u5c0f\uff1a<\/p>\n<ul data-start=\"3451\" data-end=\"3564\">\n<li data-section-id=\"15wft32\" data-start=\"3451\" data-end=\"3464\">\n<p data-start=\"3453\" data-end=\"3464\">\u904e\u71b1<\/p>\n<\/li>\n<li data-section-id=\"at34lw\" data-start=\"3465\" data-end=\"3489\">\n<p data-start=\"3467\" data-end=\"3489\">\u7d55\u7de3\u964d\u89e3<\/p>\n<\/li>\n<li data-section-id=\"7rgmbn\" data-start=\"3490\" data-end=\"3504\">\n<p data-start=\"3492\" data-end=\"3504\">\u96fb\u58d3\u964d<\/p>\n<\/li>\n<li data-section-id=\"rf2ay4\" data-start=\"3505\" data-end=\"3533\">\n<p data-start=\"3507\" data-end=\"3533\">\u964d\u4f4e\u8a2d\u5099\u58fd\u547d<\/p>\n<\/li>\n<li data-section-id=\"16cg0vi\" data-start=\"3534\" data-end=\"3564\">\n<p data-start=\"3536\" data-end=\"3564\">\u8b8a\u58d3\u5668\u53ef\u80fd\u6545\u969c<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"3566\" data-end=\"3632\">\u9019\u662f\u5feb\u901f\u64f4\u5f35\u7684\u5de5\u696d\u8a2d\u65bd\u5e38\u898b\u7684\u554f\u984c\u3002.<\/p>\n<hr data-start=\"3634\" data-end=\"3637\" \/>\n<h2 data-section-id=\"gd3ga1\" data-start=\"3639\" data-end=\"3672\"><span class=\"ez-toc-section\" id=\"Oversized_Transformer_Problems\"><\/span>\u8d85\u5927\u8b8a\u58d3\u5668\u554f\u984c<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"3674\" data-end=\"3708\">\u5c3a\u5bf8\u904e\u5927\u4e5f\u6709\u7f3a\u9ede\uff1a<\/p>\n<ul data-start=\"3710\" data-end=\"3793\">\n<li data-section-id=\"j0kjht\" data-start=\"3710\" data-end=\"3732\">\n<p data-start=\"3712\" data-end=\"3732\">\u8cfc\u8cb7\u6210\u672c\u8f03\u9ad8<\/p>\n<\/li>\n<li data-section-id=\"1ds5k53\" data-start=\"3733\" data-end=\"3759\">\n<p data-start=\"3735\" data-end=\"3759\">\u7a7a\u8f09\u640d\u8017\u589e\u52a0<\/p>\n<\/li>\n<li data-section-id=\"dn369u\" data-start=\"3760\" data-end=\"3793\">\n<p data-start=\"3762\" data-end=\"3793\">\u8f15\u8f09\u6642\u6548\u7387\u8f03\u4f4e<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"3795\" data-end=\"3917\">\u56e0\u6b64\uff0c\u6700\u4f73\u505a\u6cd5\u662f\u9078\u64c7\u8b8a\u58d3\u5668 <strong data-start=\"3851\" data-end=\"3916\">\u63a5\u8fd1\u8a08\u7b97\u8ca0\u8f09\uff0c\u4e26\u5177\u6709\u5408\u7406\u7684\u64f4\u5c55\u9918\u91cf<\/strong>.<\/p>\n<hr data-start=\"3919\" data-end=\"3922\" \/>\n<h1 data-section-id=\"1q0obql\" data-start=\"3924\" data-end=\"3976\"><span class=\"ez-toc-section\" id=\"Factors_That_Affect_Transformer_Capacity_Selection\"><\/span>\u5f71\u97ff\u8b8a\u58d3\u5668\u5bb9\u91cf\u9078\u64c7\u7684\u56e0\u7d20<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p data-start=\"3978\" data-end=\"4045\">\u9078\u64c7\u8b8a\u58d3\u5668\u5c3a\u5bf8\u6642\uff0c\u5fc5\u9808\u8003\u616e\u5e7e\u500b\u56e0\u7d20\u3002.<\/p>\n<h2 data-section-id=\"b9ep0k\" data-start=\"4047\" data-end=\"4062\"><span class=\"ez-toc-section\" id=\"1_Load_Type\"><\/span>1.\u8ca0\u8f09\u985e\u578b<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"4064\" data-end=\"4099\">\u4e0d\u540c\u7684\u8ca0\u8f09\u6709\u4e0d\u540c\u7684\u8868\u73fe\u3002.<\/p>\n<p data-start=\"4101\" data-end=\"4110\">\u7bc4\u4f8b\uff1a<\/p>\n<ul data-start=\"4112\" data-end=\"4183\">\n<li data-section-id=\"159d4y8\" data-start=\"4112\" data-end=\"4120\">\n<p data-start=\"4114\" data-end=\"4120\">\u96fb\u52d5\u6a5f<\/p>\n<\/li>\n<li data-section-id=\"ufvye0\" data-start=\"4121\" data-end=\"4140\">\n<p data-start=\"4123\" data-end=\"4140\">\u710a\u63a5\u8a2d\u5099<\/p>\n<\/li>\n<li data-section-id=\"1tr1blu\" data-start=\"4141\" data-end=\"4155\">\n<p data-start=\"4143\" data-end=\"4155\">HVAC \u7cfb\u7d71<\/p>\n<\/li>\n<li data-section-id=\"1d8lsid\" data-start=\"4156\" data-end=\"4183\">\n<p data-start=\"4158\" data-end=\"4183\">\u8b8a\u983b\u9a45\u52d5\u5668<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"4185\" data-end=\"4279\">\u99ac\u9054\u8ca0\u8f09\u901a\u5e38\u9700\u8981 <strong data-start=\"4211\" data-end=\"4238\">\u66f4\u9ad8\u7684\u555f\u52d5\u96fb\u6d41<\/strong>, \uff0c\u5728\u9078\u578b\u6642\u5fc5\u9808\u8003\u616e\u9019\u4e00\u9ede\u3002.<\/p>\n<hr data-start=\"4281\" data-end=\"4284\" \/>\n<h2 data-section-id=\"hhaged\" data-start=\"4286\" data-end=\"4308\"><span class=\"ez-toc-section\" id=\"2_Future_Expansion\"><\/span>2.\u672a\u4f86\u64f4\u5c55<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"4310\" data-end=\"4355\">\u5de5\u696d\u8a2d\u65bd\u901a\u5e38\u6703\u96a8\u6642\u9593\u64f4\u5145\u3002.<\/p>\n<p data-start=\"4357\" data-end=\"4444\">\u5de5\u7a0b\u5e2b\u901a\u5e38\u6703\u4fdd\u7559 <strong data-start=\"4385\" data-end=\"4415\">20-30% \u984d\u5916\u5bb9\u91cf<\/strong> \u4ee5\u652f\u63f4\u672a\u4f86\u7684\u8a2d\u5099\u3002.<\/p>\n<hr data-start=\"4446\" data-end=\"4449\" \/>\n<h2 data-section-id=\"7kb964\" data-start=\"4451\" data-end=\"4476\"><span class=\"ez-toc-section\" id=\"3_Ambient_Temperature\"><\/span>3.\u74b0\u5883\u6eab\u5ea6<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"4478\" data-end=\"4542\">\u74b0\u5883\u6eab\u5ea6\u904e\u9ad8\u6703\u964d\u4f4e\u8b8a\u58d3\u5668\u7684\u51b7\u537b\u6548\u7387\u3002.<\/p>\n<p data-start=\"4544\" data-end=\"4651\">\u5728\u708e\u71b1\u6c23\u5019\u4e0b\u64cd\u4f5c\u7684\u6236\u5916\u8b8a\u58d3\u5668\u53ef\u80fd\u9700\u8981 <strong data-start=\"4603\" data-end=\"4650\">\u66f4\u5927\u5bb9\u91cf\u6216\u6539\u9032\u7684\u51b7\u537b\u65b9\u6cd5<\/strong>.<\/p>\n<hr data-start=\"4653\" data-end=\"4656\" \/>\n<h2 data-section-id=\"fmb4nr\" data-start=\"4658\" data-end=\"4678\"><span class=\"ez-toc-section\" id=\"4_Harmonic_Loads\"><\/span>4.\u8ae7\u6ce2\u8ca0\u8f09<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"4680\" data-end=\"4726\">\u73fe\u4ee3\u8a2d\u65bd\u4f7f\u7528\u8a31\u591a\u96fb\u5b50\u88dd\u7f6e\uff1a<\/p>\n<ul data-start=\"4728\" data-end=\"4769\">\n<li data-section-id=\"nu7ld4\" data-start=\"4728\" data-end=\"4741\">\n<p data-start=\"4730\" data-end=\"4741\">UPS \u7cfb\u7d71<\/p>\n<\/li>\n<li data-section-id=\"16uiqbk\" data-start=\"4742\" data-end=\"4756\">\n<p data-start=\"4744\" data-end=\"4756\">\u8cc7\u6599\u4e2d\u5fc3<\/p>\n<\/li>\n<li data-section-id=\"2cbyf7\" data-start=\"4757\" data-end=\"4769\">\n<p data-start=\"4759\" data-end=\"4769\">VFD \u9a45\u52d5\u5668<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"4771\" data-end=\"4848\">\u9019\u4e9b\u5275\u9020 <strong data-start=\"4784\" data-end=\"4807\">\u8ae7\u6ce2\u5931\u771f<\/strong>, \uff0c\u9019\u6703\u589e\u52a0\u8b8a\u58d3\u5668\u7684\u767c\u71b1\u3002.<\/p>\n<p data-start=\"4850\" data-end=\"4928\">\u5728\u9019\u7a2e\u60c5\u6cc1\u4e0b\u3001, <strong data-start=\"4865\" data-end=\"4889\">K \u7d1a\u8b8a\u58d3\u5668<\/strong> \u6216\u66f4\u5927\u7684\u5bb9\u91cf\u3002.<\/p>\n<hr data-start=\"4930\" data-end=\"4933\" \/>\n<h2 data-section-id=\"19teo0i\" data-start=\"4935\" data-end=\"4951\"><span class=\"ez-toc-section\" id=\"5_Duty_Cycle\"><\/span>5.\u5de5\u4f5c\u9031\u671f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"4953\" data-end=\"5046\">\u8207\u9593\u6b47\u6027\u8ca0\u8f09\u76f8\u6bd4\uff0c\u9023\u7e8c\u6027\u8ca0\u8f09\u9700\u8981\u66f4\u4fdd\u5b88\u7684\u8b8a\u58d3\u5668\u898f\u683c\u3002.<\/p>\n<p data-start=\"5048\" data-end=\"5060\">\u4f8b\u5982\uff1a<\/p>\n<ul data-start=\"5062\" data-end=\"5124\">\n<li data-section-id=\"1syq8jk\" data-start=\"5062\" data-end=\"5078\">\n<p data-start=\"5064\" data-end=\"5078\">\u8cc7\u6599\u4e2d\u5fc3<\/p>\n<\/li>\n<li data-section-id=\"ta3igl\" data-start=\"5079\" data-end=\"5102\">\n<p data-start=\"5081\" data-end=\"5102\">\u751f\u7522\u7dda<\/p>\n<\/li>\n<li data-section-id=\"sjfnj8\" data-start=\"5103\" data-end=\"5124\">\n<p data-start=\"5105\" data-end=\"5124\">\u63a1\u7926\u696d\u52d9<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"5126\" data-end=\"5168\">\u9019\u4e9b\u61c9\u7528\u7a0b\u5f0f\u901a\u5e38\u6703\u904b\u4f5c <strong data-start=\"5159\" data-end=\"5167\">24\/7<\/strong>.<\/p>\n<hr data-start=\"5170\" data-end=\"5173\" \/>\n<h1 data-section-id=\"yeakkk\" data-start=\"5175\" data-end=\"5212\"><span class=\"ez-toc-section\" id=\"Choosing_the_Right_Transformer_Type\"><\/span>\u9078\u64c7\u6b63\u78ba\u7684\u8b8a\u58d3\u5668\u985e\u578b<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p data-start=\"5214\" data-end=\"5314\">\u78ba\u5b9a\u8b8a\u58d3\u5668\u5bb9\u91cf\u4e4b\u5f8c\uff0c\u4e0b\u4e00\u6b65\u5c31\u662f\u9078\u64c7\u9069\u7576\u7684\u8b8a\u58d3\u5668\u985e\u578b\u3002.<\/p>\n<p data-start=\"5316\" data-end=\"5339\">\u5e38\u898b\u9078\u9805\u5305\u62ec<\/p>\n<h3 data-section-id=\"1eoswsa\" data-start=\"5341\" data-end=\"5369\"><span class=\"ez-toc-section\" id=\"Pad-Mounted_Transformers\"><\/span><a href=\"https:\/\/yawei-powertransformer.com\/zh\/Wholesale\/pad-mounted-transformers\/\">\u588a\u88dd\u5f0f\u8b8a\u58d3\u5668<\/a><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"5371\" data-end=\"5379\">\u7528\u65bc\uff1a<\/p>\n<ul data-start=\"5381\" data-end=\"5449\">\n<li data-section-id=\"h4ppm9\" data-start=\"5381\" data-end=\"5403\">\n<p data-start=\"5383\" data-end=\"5403\">\u5546\u696d\u6a13\u5b87<\/p>\n<\/li>\n<li data-section-id=\"1urpppc\" data-start=\"5404\" data-end=\"5430\">\n<p data-start=\"5406\" data-end=\"5430\">\u4f4f\u5b85\u914d\u9001<\/p>\n<\/li>\n<li data-section-id=\"55i7ys\" data-start=\"5431\" data-end=\"5449\">\n<p data-start=\"5433\" data-end=\"5449\">\u5de5\u696d\u5712\u5340<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"5451\" data-end=\"5462\">\u512a\u52e2\uff1a<\/p>\n<ul data-start=\"5464\" data-end=\"5526\">\n<li data-section-id=\"ggvmv\" data-start=\"5464\" data-end=\"5491\">\n<p data-start=\"5466\" data-end=\"5491\">\u5730\u9762\u5b89\u88dd<\/p>\n<\/li>\n<li data-section-id=\"u862n1\" data-start=\"5492\" data-end=\"5508\">\n<p data-start=\"5494\" data-end=\"5508\">\u7dca\u6e4a\u578b\u8a2d\u8a08<\/p>\n<\/li>\n<li data-section-id=\"1vjmu16\" data-start=\"5509\" data-end=\"5526\">\n<p data-start=\"5511\" data-end=\"5526\">\u63d0\u9ad8\u5b89\u5168\u6027<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"5528\" data-end=\"5531\" \/>\n<h3 data-section-id=\"6b5mah\" data-start=\"5533\" data-end=\"5562\"><span class=\"ez-toc-section\" id=\"Pole-Mounted_Transformers\"><\/span><a href=\"https:\/\/yawei-powertransformer.com\/zh\/Wholesale\/pole-mounted-transformers\/\">\u67f1\u4e0a\u8b8a\u58d3\u5668<\/a><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"5564\" data-end=\"5574\">\u5e38\u898b\u65bc\uff1a<\/p>\n<ul data-start=\"5576\" data-end=\"5625\">\n<li data-section-id=\"1cflf2t\" data-start=\"5576\" data-end=\"5602\">\n<p data-start=\"5578\" data-end=\"5602\">\u8fb2\u6751\u914d\u96fb<\/p>\n<\/li>\n<li data-section-id=\"d90kuk\" data-start=\"5603\" data-end=\"5625\">\n<p data-start=\"5605\" data-end=\"5625\">\u67b6\u7a7a\u96fb\u7e9c<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"5627\" data-end=\"5638\">\u512a\u52e2\uff1a<\/p>\n<ul data-start=\"5640\" data-end=\"5687\">\n<li data-section-id=\"d9muqz\" data-start=\"5640\" data-end=\"5663\">\n<p data-start=\"5642\" data-end=\"5663\">\u5b89\u88dd\u6210\u672c\u4f4e<\/p>\n<\/li>\n<li data-section-id=\"mncdep\" data-start=\"5664\" data-end=\"5687\">\n<p data-start=\"5666\" data-end=\"5687\">\u7c21\u55ae\u57fa\u790e\u5efa\u8a2d<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"5689\" data-end=\"5692\" \/>\n<h3 data-section-id=\"16f7cg\" data-start=\"5694\" data-end=\"5721\"><span class=\"ez-toc-section\" id=\"Substation_Transformers\"><\/span><a href=\"https:\/\/yawei-powertransformer.com\/zh\/Wholesale\/substation-transformers\/\">\u8b8a\u96fb\u7ad9\u8b8a\u58d3\u5668<\/a><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"5723\" data-end=\"5731\">\u7528\u65bc\uff1a<\/p>\n<ul data-start=\"5733\" data-end=\"5799\">\n<li data-section-id=\"8ki7ph\" data-start=\"5733\" data-end=\"5754\">\n<p data-start=\"5735\" data-end=\"5754\">\u516c\u7528\u8b8a\u96fb\u7ad9<\/p>\n<\/li>\n<li data-section-id=\"x1cecj\" data-start=\"5755\" data-end=\"5769\">\n<p data-start=\"5757\" data-end=\"5769\">\u767c\u96fb\u5ee0<\/p>\n<\/li>\n<li data-section-id=\"hpldn5\" data-start=\"5770\" data-end=\"5799\">\n<p data-start=\"5772\" data-end=\"5799\">\u5927\u578b\u5de5\u696d\u8a2d\u65bd<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"5801\" data-end=\"5812\">\u512a\u52e2\uff1a<\/p>\n<ul data-start=\"5814\" data-end=\"5855\">\n<li data-section-id=\"1nrfg4y\" data-start=\"5814\" data-end=\"5829\">\n<p data-start=\"5816\" data-end=\"5829\">\u9ad8\u5bb9\u91cf<\/p>\n<\/li>\n<li data-section-id=\"1syx66s\" data-start=\"5830\" data-end=\"5855\">\n<p data-start=\"5832\" data-end=\"5855\">\u9ad8\u96fb\u58d3\u80fd\u529b<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"5857\" data-end=\"5860\" \/>\n<h1 data-section-id=\"1fuhl2n\" data-start=\"5862\" data-end=\"5904\"><span class=\"ez-toc-section\" id=\"Typical_Transformer_Voltage_Combinations\"><\/span>\u5178\u578b\u7684\u8b8a\u58d3\u5668\u96fb\u58d3\u7d44\u5408<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p data-start=\"5906\" data-end=\"5977\">\u5de5\u696d\u8b8a\u58d3\u5668\u901a\u5e38\u4f7f\u7528\u4e0b\u5217\u96fb\u58d3\u914d\u7f6e\uff1a<\/p>\n<table style=\"border-collapse: collapse; width: 100%;\">\n<tbody>\n<tr style=\"height: 25.00pt;\">\n<th class=\"et3\" style=\"height: 25pt; width: 48.7379%;\" width=\"272\" height=\"33\">\u4e00\u6b21\u96fb\u58d3<\/th>\n<th class=\"et3\" style=\"width: 51.068%;\" width=\"284\">\u4e8c\u6b21\u96fb\u58d3<\/th>\n<\/tr>\n<tr style=\"height: 25.00pt;\">\n<td class=\"et4\" style=\"height: 25pt; width: 48.7379%;\" width=\"272\" height=\"33\">13.8 kV<\/td>\n<td class=\"et4\" style=\"width: 51.068%;\" width=\"284\">480V<\/td>\n<\/tr>\n<tr style=\"height: 25.00pt;\">\n<td class=\"et4\" style=\"height: 25pt; width: 48.7379%;\" width=\"272\" height=\"33\">33 kV<\/td>\n<td class=\"et4\" style=\"width: 51.068%;\" width=\"284\">400V<\/td>\n<\/tr>\n<tr style=\"height: 25.00pt;\">\n<td class=\"et4\" style=\"height: 25pt; width: 48.7379%;\" width=\"272\" height=\"33\">34.5 kV<\/td>\n<td class=\"et4\" style=\"width: 51.068%;\" width=\"284\">480V<\/td>\n<\/tr>\n<tr style=\"height: 25.00pt;\">\n<td class=\"et4\" style=\"height: 25pt; width: 48.7379%;\" width=\"272\" height=\"33\">11 kV<\/td>\n<td class=\"et4\" style=\"width: 51.068%;\" width=\"284\">415V<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p data-start=\"6131\" data-end=\"6207\">\u78ba\u5207\u7684\u914d\u7f6e\u53d6\u6c7a\u65bc <strong data-start=\"6170\" data-end=\"6206\">\u914d\u96fb\u7cfb\u7d71\u8a2d\u8a08<\/strong>.<\/p>\n<hr data-start=\"6209\" data-end=\"6212\" \/>\n<h1 data-section-id=\"jbbfny\" data-start=\"6214\" data-end=\"6256\"><span class=\"ez-toc-section\" id=\"Best_Practices_for_Transformer_Selection\"><\/span>\u8b8a\u58d3\u5668\u9078\u64c7\u7684\u6700\u4f73\u5be6\u52d9<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p data-start=\"6258\" data-end=\"6308\">\u96fb\u5b50\u5de5\u7a0b\u5e2b\u901a\u5e38\u6703\u9075\u5faa\u9019\u4e9b\u6b65\u9a5f\uff1a<\/p>\n<ol data-start=\"6310\" data-end=\"6545\">\n<li data-section-id=\"7w09hh\" data-start=\"6310\" data-end=\"6345\">\n<p data-start=\"6313\" data-end=\"6345\">\u8a08\u7b97\u7e3d\u9023\u63a5\u8ca0\u8f09<\/p>\n<\/li>\n<li data-section-id=\"om61f\" data-start=\"6346\" data-end=\"6375\">\n<p data-start=\"6349\" data-end=\"6375\">\u78ba\u5b9a\u7cfb\u7d71\u96fb\u58d3<\/p>\n<\/li>\n<li data-section-id=\"140nz31\" data-start=\"6376\" data-end=\"6412\">\n<p data-start=\"6379\" data-end=\"6412\">\u8a08\u7b97\u6240\u9700\u7684 kVA \u5bb9\u91cf<\/p>\n<\/li>\n<li data-section-id=\"d7v4m6\" data-start=\"6413\" data-end=\"6449\">\n<p data-start=\"6416\" data-end=\"6449\">\u589e\u52a0\u64f4\u5145\u6642\u7684\u5b89\u5168\u9918\u91cf<\/p>\n<\/li>\n<li data-section-id=\"1abqkeq\" data-start=\"6450\" data-end=\"6490\">\n<p data-start=\"6453\" data-end=\"6490\">\u9078\u64c7\u9069\u7576\u7684\u8b8a\u58d3\u5668\u985e\u578b<\/p>\n<\/li>\n<li data-section-id=\"17s1z5\" data-start=\"6491\" data-end=\"6545\">\n<p data-start=\"6494\" data-end=\"6545\">\u78ba\u8a8d\u5b89\u88dd\u74b0\u5883 (\u5ba4\u5167 \/ \u5ba4\u5916)<\/p>\n<\/li>\n<\/ol>\n<p data-start=\"6547\" data-end=\"6635\">\u9075\u5faa\u9019\u4e9b\u6b65\u9a5f\u6709\u52a9\u65bc\u78ba\u4fdd <strong data-start=\"6582\" data-end=\"6634\">\u5b89\u5168\u3001\u53ef\u9760\u3001\u9ad8\u6548\u7684\u914d\u96fb<\/strong>.<\/p>\n<hr data-start=\"6637\" data-end=\"6640\" \/>\n<h1 data-section-id=\"fsb6xx\" data-start=\"6642\" data-end=\"6654\"><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>\u7e3d\u7d50<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p data-start=\"6656\" data-end=\"6866\">\u6b63\u78ba\u7684\u8b8a\u58d3\u5668\u898f\u683c\u5c0d\u65bc\u53ef\u9760\u7684\u96fb\u529b\u7cfb\u7d71\u6027\u80fd\u800c\u8a00\u81f3\u95dc\u91cd\u8981\u3002\u9078\u64c7\u5408\u9069\u7684\u8b8a\u58d3\u5668\u5bb9\u91cf\u6709\u52a9\u65bc\u9632\u6b62\u904e\u71b1\u3001\u964d\u4f4e\u640d\u8017\u4e26\u78ba\u4fdd\u9577\u671f\u904b\u884c\u7684\u7a69\u5b9a\u6027\u3002.<\/p>\n<p data-start=\"6868\" data-end=\"7073\">\u900f\u904e\u4f7f\u7528\u9069\u7576\u7684 <strong data-start=\"6888\" data-end=\"6916\">kVA \u8a08\u7b97\u516c\u5f0f<\/strong>, \u900f\u904e\u8a55\u4f30\u8ca0\u8f09\u7279\u6027\u4e26\u8003\u616e\u672a\u4f86\u7684\u64f4\u5145\uff0c\u5de5\u7a0b\u5e2b\u53ef\u4ee5\u70ba\u5de5\u696d\u548c\u5546\u696d\u61c9\u7528\u9078\u64c7\u6700\u4f73\u7684\u8b8a\u58d3\u5668\u3002.<\/p>\n<p data-start=\"7075\" data-end=\"7243\">\u8eab\u70ba\u5c08\u696d\u4eba\u58eb <strong data-start=\"7093\" data-end=\"7127\"><a href=\"https:\/\/yawei-powertransformer.com\/zh\/Wholesale\/hv-power-transformers\/\">\u96fb\u6e90\u8b8a\u58d3\u5668<\/a> \u88fd\u9020\u5546<\/strong>, ,\u4e9e\u5a01\u8b8a\u58d3\u70ba\u5168\u7403\u5de5\u696d\u8207\u516c\u7528\u4e8b\u696d\u5c08\u6848\u63d0\u4f9b\u5ba2\u88fd\u5316\u7684\u8b8a\u58d3\u5668\u89e3\u6c7a\u65b9\u6848\uff0c\u5305\u62ec<\/p>\n<ul data-start=\"7245\" data-end=\"7361\">\n<li data-section-id=\"q5hba2\" data-start=\"7245\" data-end=\"7274\">\n<p data-start=\"7247\" data-end=\"7274\">\u914d\u96fb\u8b8a\u58d3\u5668<\/p>\n<\/li>\n<li data-section-id=\"bcegqc\" data-start=\"7275\" data-end=\"7303\">\n<p data-start=\"7277\" data-end=\"7303\">\u588a\u88dd\u5f0f\u8b8a\u58d3\u5668<\/p>\n<\/li>\n<li data-section-id=\"yj4ljr\" data-start=\"7304\" data-end=\"7333\">\n<p data-start=\"7306\" data-end=\"7333\">\u67f1\u4e0a\u8b8a\u58d3\u5668<\/p>\n<\/li>\n<li data-section-id=\"mrs9ge\" data-start=\"7334\" data-end=\"7361\">\n<p data-start=\"7336\" data-end=\"7361\">\u8b8a\u96fb\u7ad9\u8b8a\u58d3\u5668<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"7363\" data-end=\"7538\">\u5982\u679c\u60a8\u9700\u8981\u5354\u52a9\u70ba\u60a8\u7684\u5c08\u6848\u9078\u64c7\u5408\u9069\u7684\u8b8a\u58d3\u5668\u5bb9\u91cf\uff0c\u6211\u5011\u7684\u5de5\u7a0b\u5718\u968a\u96a8\u6642\u6e96\u5099\u70ba\u60a8\u63d0\u4f9b\u4ee5\u4e0b\u5354\u52a9 <strong data-start=\"7491\" data-end=\"7537\">\u6280\u8853\u652f\u63f4\u8207\u5ba2\u88fd\u5316\u89e3\u6c7a\u65b9\u6848<\/strong>.<\/p>\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\/2155#wpcf7-f280-o1\" method=\"post\" class=\"wpcf7-form init\" aria-label=\"\u806f\u7d61\u8868\u683c\" novalidate=\"novalidate\" data-status=\"init\" 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value=\"zh\"\/><\/form>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Introduction Choosing the correct transformer size is one of the most important decisions in electrical power system design. An undersized transformer may lead to overheating, voltage drops, and equipment failure, while an oversized transformer can result in unnecessary investment costs and higher no-load losses. 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This complete guide explains transformer capacity formulas, sizing methods, and practical engineering examples for selecting the right distribution transformer. Provided by Yawei Transformer, a professional power transformer manufacturer.\" \/>\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\/how-to-calculate-transformer-size-kva-complete-guide-for-industrial-and-commercial-power-systems\/\" \/>\n<meta property=\"og:locale\" content=\"zh_HK\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to Calculate Transformer Size (kVA) for Industrial &amp; Commercial Power Systems | Transformer Capacity Guide \u2013 Yawei Transformer\" \/>\n<meta property=\"og:description\" content=\"Learn how to calculate transformer size (kVA) for industrial and commercial power systems. 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