{"id":2368,"date":"2025-09-19T07:07:16","date_gmt":"2025-09-19T07:07:16","guid":{"rendered":"https:\/\/evernewtransformer.ru\/?p=2368"},"modified":"2025-09-26T09:14:46","modified_gmt":"2025-09-26T09:14:46","slug":"%d0%be%d1%81%d0%bd%d0%be%d0%b2%d1%8b-%d1%80%d0%b0%d1%81%d1%87%d1%91%d1%82%d0%b0-%d1%82%d1%80%d0%b0%d0%bd%d1%81%d1%84%d0%be%d1%80%d0%bc%d0%b0%d1%82%d0%be%d1%80%d0%b0-%d0%bc%d0%be%d1%89%d0%bd%d0%be","status":"publish","type":"post","link":"https:\/\/evernewtransformer.ru\/en\/%d0%be%d1%81%d0%bd%d0%be%d0%b2%d1%8b-%d1%80%d0%b0%d1%81%d1%87%d1%91%d1%82%d0%b0-%d1%82%d1%80%d0%b0%d0%bd%d1%81%d1%84%d0%be%d1%80%d0%bc%d0%b0%d1%82%d0%be%d1%80%d0%b0-%d0%bc%d0%be%d1%89%d0%bd%d0%be\/","title":{"rendered":"Basics of transformer calculation: power, losses and efficiency"},"content":{"rendered":"<p data-start=\"241\" data-end=\"570\"><a href=\"https:\/\/evernewtransformer.ru\/en\/nl\/groothandel\/\u0442\u0440\u0430\u043d\u0441\u0444\u043e\u0440\u043c\u0430\u0442\u043e\u0440\u044b\/\">Power transformers<\/a> play a key role in the transmission and distribution of electric power. Their correct calculation determines the reliability of the power system, economic efficiency and the service life of the equipment. In this article we will look at how to determine the transformer capacity, calculate losses and estimate its efficiency.<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_69_1 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\" >Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/evernewtransformer.ru\/en\/%d0%be%d1%81%d0%bd%d0%be%d0%b2%d1%8b-%d1%80%d0%b0%d1%81%d1%87%d1%91%d1%82%d0%b0-%d1%82%d1%80%d0%b0%d0%bd%d1%81%d1%84%d0%be%d1%80%d0%bc%d0%b0%d1%82%d0%be%d1%80%d0%b0-%d0%bc%d0%be%d1%89%d0%bd%d0%be\/#1_%D0%9D%D0%BE%D0%BC%D0%B8%D0%BD%D0%B0%D0%BB%D1%8C%D0%BD%D0%B0%D1%8F_%D0%BC%D0%BE%D1%89%D0%BD%D0%BE%D1%81%D1%82%D1%8C_%D1%82%D1%80%D0%B0%D0%BD%D1%81%D1%84%D0%BE%D1%80%D0%BC%D0%B0%D1%82%D0%BE%D1%80%D0%B0\" title=\"1. Rated power of the transformer\">1. Rated power of the transformer<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/evernewtransformer.ru\/en\/%d0%be%d1%81%d0%bd%d0%be%d0%b2%d1%8b-%d1%80%d0%b0%d1%81%d1%87%d1%91%d1%82%d0%b0-%d1%82%d1%80%d0%b0%d0%bd%d1%81%d1%84%d0%be%d1%80%d0%bc%d0%b0%d1%82%d0%be%d1%80%d0%b0-%d0%bc%d0%be%d1%89%d0%bd%d0%be\/#2_%D0%92%D0%B8%D0%B4%D1%8B_%D0%BF%D0%BE%D1%82%D0%B5%D1%80%D1%8C_%D0%B2_%D1%82%D1%80%D0%B0%D0%BD%D1%81%D1%84%D0%BE%D1%80%D0%BC%D0%B0%D1%82%D0%BE%D1%80%D0%B5\" title=\"2. Types of losses in transformer\">2. Types of losses in transformer<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/evernewtransformer.ru\/en\/%d0%be%d1%81%d0%bd%d0%be%d0%b2%d1%8b-%d1%80%d0%b0%d1%81%d1%87%d1%91%d1%82%d0%b0-%d1%82%d1%80%d0%b0%d0%bd%d1%81%d1%84%d0%be%d1%80%d0%bc%d0%b0%d1%82%d0%be%d1%80%d0%b0-%d0%bc%d0%be%d1%89%d0%bd%d0%be\/#3_%D0%9A%D0%9F%D0%94_%D1%82%D1%80%D0%B0%D0%BD%D1%81%D1%84%D0%BE%D1%80%D0%BC%D0%B0%D1%82%D0%BE%D1%80%D0%B0\" title=\"3. Transformer efficiency\">3. Transformer efficiency<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/evernewtransformer.ru\/en\/%d0%be%d1%81%d0%bd%d0%be%d0%b2%d1%8b-%d1%80%d0%b0%d1%81%d1%87%d1%91%d1%82%d0%b0-%d1%82%d1%80%d0%b0%d0%bd%d1%81%d1%84%d0%be%d1%80%d0%bc%d0%b0%d1%82%d0%be%d1%80%d0%b0-%d0%bc%d0%be%d1%89%d0%bd%d0%be\/#4_%D0%9F%D1%80%D0%B8%D0%BC%D0%B5%D1%80_%D1%80%D0%B0%D1%81%D1%87%D1%91%D1%82%D0%B0\" title=\"4. Calculation example\">4. Calculation example<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/evernewtransformer.ru\/en\/%d0%be%d1%81%d0%bd%d0%be%d0%b2%d1%8b-%d1%80%d0%b0%d1%81%d1%87%d1%91%d1%82%d0%b0-%d1%82%d1%80%d0%b0%d0%bd%d1%81%d1%84%d0%be%d1%80%d0%bc%d0%b0%d1%82%d0%be%d1%80%d0%b0-%d0%bc%d0%be%d1%89%d0%bd%d0%be\/#5_%D0%9A%D0%B0%D0%BA_%D1%81%D0%BD%D0%B8%D0%B7%D0%B8%D1%82%D1%8C_%D0%BF%D0%BE%D1%82%D0%B5%D1%80%D0%B8_%D0%B8_%D0%BF%D0%BE%D0%B2%D1%8B%D1%81%D0%B8%D1%82%D1%8C_%D0%9A%D0%9F%D0%94\" title=\"5. How to reduce losses and increase efficiency\">5. How to reduce losses and increase efficiency<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/evernewtransformer.ru\/en\/%d0%be%d1%81%d0%bd%d0%be%d0%b2%d1%8b-%d1%80%d0%b0%d1%81%d1%87%d1%91%d1%82%d0%b0-%d1%82%d1%80%d0%b0%d0%bd%d1%81%d1%84%d0%be%d1%80%d0%bc%d0%b0%d1%82%d0%be%d1%80%d0%b0-%d0%bc%d0%be%d1%89%d0%bd%d0%be\/#%D0%97%D0%B0%D0%BA%D0%BB%D1%8E%D1%87%D0%B5%D0%BD%D0%B8%D0%B5\" title=\"Conclusion\">Conclusion<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/evernewtransformer.ru\/en\/%d0%be%d1%81%d0%bd%d0%be%d0%b2%d1%8b-%d1%80%d0%b0%d1%81%d1%87%d1%91%d1%82%d0%b0-%d1%82%d1%80%d0%b0%d0%bd%d1%81%d1%84%d0%be%d1%80%d0%bc%d0%b0%d1%82%d0%be%d1%80%d0%b0-%d0%bc%d0%be%d1%89%d0%bd%d0%be\/#%D0%A7%D0%B0%D1%81%D1%82%D0%BE_%D0%B7%D0%B0%D0%B4%D0%B0%D0%B2%D0%B0%D0%B5%D0%BC%D1%8B%D0%B5_%D0%B2%D0%BE%D0%BF%D1%80%D0%BE%D1%81%D1%8B_FAQ\" title=\"Frequently Asked Questions (FAQ)\">Frequently Asked Questions (FAQ)<\/a><\/li><\/ul><\/nav><\/div>\n<h2 data-start=\"577\" data-end=\"621\"><span class=\"ez-toc-section\" id=\"1_%D0%9D%D0%BE%D0%BC%D0%B8%D0%BD%D0%B0%D0%BB%D1%8C%D0%BD%D0%B0%D1%8F_%D0%BC%D0%BE%D1%89%D0%BD%D0%BE%D1%81%D1%82%D1%8C_%D1%82%D1%80%D0%B0%D0%BD%D1%81%D1%84%D0%BE%D1%80%D0%BC%D0%B0%D1%82%D0%BE%D1%80%D0%B0\"><\/span>1. Rated power of the transformer<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"622\" data-end=\"726\"><strong data-start=\"622\" data-end=\"649\">Transformer power<\/strong> (S, kVA) indicates the electrical load it is capable of serving.<\/p>\n<ul data-start=\"727\" data-end=\"898\">\n<li data-start=\"727\" data-end=\"898\">\n<p data-start=\"729\" data-end=\"767\"><strong data-start=\"729\" data-end=\"764\">Formula for calculating the total power<\/strong>:<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-2373\" src=\"https:\/\/evernewtransformer.ru\/wp-content\/uploads\/2025\/09\/S.png\" alt=\"\" width=\"764\" height=\"50\" srcset=\"https:\/\/evernewtransformer.ru\/wp-content\/uploads\/2025\/09\/S.png 764w, https:\/\/evernewtransformer.ru\/wp-content\/uploads\/2025\/09\/S-300x20.png 300w, https:\/\/evernewtransformer.ru\/wp-content\/uploads\/2025\/09\/S-18x1.png 18w, https:\/\/evernewtransformer.ru\/wp-content\/uploads\/2025\/09\/S-600x39.png 600w\" sizes=\"auto, (max-width: 764px) 100vw, 764px\" \/>where <span class=\"katex\"><span class=\"katex-mathml\">UU<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">U<\/span><\/span><\/span><\/span> - Tension, <span class=\"katex\"><span class=\"katex-mathml\">II<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">I<\/span><\/span><\/span><\/span> - current on the corresponding side of the transformer.<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"900\" data-end=\"995\">The power rating is selected based on the required load with allowance (typically 20-30%).<\/p>\n<h2 data-start=\"1002\" data-end=\"1039\"><span class=\"ez-toc-section\" id=\"2_%D0%92%D0%B8%D0%B4%D1%8B_%D0%BF%D0%BE%D1%82%D0%B5%D1%80%D1%8C_%D0%B2_%D1%82%D1%80%D0%B0%D0%BD%D1%81%D1%84%D0%BE%D1%80%D0%BC%D0%B0%D1%82%D0%BE%D1%80%D0%B5\"><\/span>2. Types of losses in transformer<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"1040\" data-end=\"1108\">During operation, some energy is inevitably lost. The main types of losses are:<\/p>\n<ol data-start=\"1110\" data-end=\"1413\">\n<li data-start=\"1110\" data-end=\"1263\">\n<p data-start=\"1113\" data-end=\"1139\"><strong data-start=\"1113\" data-end=\"1137\">Idle losses (P\u2080)<\/strong><\/p>\n<ul data-start=\"1143\" data-end=\"1263\">\n<li data-start=\"1143\" data-end=\"1209\">\n<p data-start=\"1145\" data-end=\"1209\">Occur in the magnetic core when voltage is applied without load.<\/p>\n<\/li>\n<li data-start=\"1213\" data-end=\"1263\">\n<p data-start=\"1215\" data-end=\"1263\">Include hysteresis losses and eddy currents.<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li data-start=\"1265\" data-end=\"1413\">\n<p data-start=\"1268\" data-end=\"1297\"><strong data-start=\"1268\" data-end=\"1295\">Load losses (Rk)<\/strong><\/p>\n<ul data-start=\"1301\" data-end=\"1413\">\n<li data-start=\"1301\" data-end=\"1352\">\n<p data-start=\"1303\" data-end=\"1352\">Related to the heating of the windings when current flows.<\/p>\n<\/li>\n<li data-start=\"1356\" data-end=\"1413\">\n<p data-start=\"1358\" data-end=\"1413\">Depends on the winding resistance and the size of the load.<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<p data-start=\"1415\" data-end=\"1445\"><strong data-start=\"1415\" data-end=\"1442\">Active loss formula<\/strong>:<\/p>\n<p data-start=\"1415\" data-end=\"1445\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-2374\" src=\"https:\/\/evernewtransformer.ru\/wp-content\/uploads\/2025\/09\/R.png\" alt=\"\" width=\"779\" height=\"54\" srcset=\"https:\/\/evernewtransformer.ru\/wp-content\/uploads\/2025\/09\/R.png 779w, https:\/\/evernewtransformer.ru\/wp-content\/uploads\/2025\/09\/R-300x21.png 300w, https:\/\/evernewtransformer.ru\/wp-content\/uploads\/2025\/09\/R-768x53.png 768w, https:\/\/evernewtransformer.ru\/wp-content\/uploads\/2025\/09\/R-18x1.png 18w, https:\/\/evernewtransformer.ru\/wp-content\/uploads\/2025\/09\/R-600x42.png 600w\" sizes=\"auto, (max-width: 779px) 100vw, 779px\" \/><\/p>\n<p data-start=\"1481\" data-end=\"1530\">where <span class=\"katex\"><span class=\"katex-mathml\">RR<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">R<\/span><\/span><\/span><\/span> - winding resistance, <span class=\"katex\"><span class=\"katex-mathml\">II<\/span><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">I<\/span><\/span><\/span><\/span> - current.<\/p>\n<h2 data-start=\"1537\" data-end=\"1564\"><span class=\"ez-toc-section\" id=\"3_%D0%9A%D0%9F%D0%94_%D1%82%D1%80%D0%B0%D0%BD%D1%81%D1%84%D0%BE%D1%80%D0%BC%D0%B0%D1%82%D0%BE%D1%80%D0%B0\"><\/span>3. Transformer efficiency<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"1565\" data-end=\"1647\">The efficiency factor (\u03b7) reflects the efficiency of the transformer.<\/p>\n<p data-start=\"1649\" data-end=\"1667\"><strong data-start=\"1649\" data-end=\"1664\">Efficiency formula<\/strong>:<\/p>\n<p data-start=\"1649\" data-end=\"1667\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-2375\" src=\"https:\/\/evernewtransformer.ru\/wp-content\/uploads\/2025\/09\/N.png\" alt=\"\" width=\"737\" height=\"73\" srcset=\"https:\/\/evernewtransformer.ru\/wp-content\/uploads\/2025\/09\/N.png 737w, https:\/\/evernewtransformer.ru\/wp-content\/uploads\/2025\/09\/N-300x30.png 300w, https:\/\/evernewtransformer.ru\/wp-content\/uploads\/2025\/09\/N-18x2.png 18w, https:\/\/evernewtransformer.ru\/wp-content\/uploads\/2025\/09\/N-600x59.png 600w\" sizes=\"auto, (max-width: 737px) 100vw, 737px\" \/><\/p>\n<p data-start=\"1649\" data-end=\"1667\">or loss-adjusted:<\/p>\n<p data-start=\"1649\" data-end=\"1667\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-2376\" src=\"https:\/\/evernewtransformer.ru\/wp-content\/uploads\/2025\/09\/N1.png\" alt=\"\" width=\"740\" height=\"77\" srcset=\"https:\/\/evernewtransformer.ru\/wp-content\/uploads\/2025\/09\/N1.png 740w, https:\/\/evernewtransformer.ru\/wp-content\/uploads\/2025\/09\/N1-300x31.png 300w, https:\/\/evernewtransformer.ru\/wp-content\/uploads\/2025\/09\/N1-18x2.png 18w, https:\/\/evernewtransformer.ru\/wp-content\/uploads\/2025\/09\/N1-600x62.png 600w\" sizes=\"auto, (max-width: 740px) 100vw, 740px\" \/><\/p>\n<p data-start=\"1826\" data-end=\"1932\">Modern power transformers can reach <strong data-start=\"1877\" data-end=\"1891\">KPD 98-99%<\/strong>This reduces operating costs.<\/p>\n<h2 data-start=\"1939\" data-end=\"1962\"><span class=\"ez-toc-section\" id=\"4_%D0%9F%D1%80%D0%B8%D0%BC%D0%B5%D1%80_%D1%80%D0%B0%D1%81%D1%87%D1%91%D1%82%D0%B0\"><\/span>4. Calculation example<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"1963\" data-end=\"1995\">Let's say the transformer has:<\/p>\n<ul data-start=\"1996\" data-end=\"2088\">\n<li data-start=\"1996\" data-end=\"2030\">\n<p data-start=\"1998\" data-end=\"2030\">Rated power: 1000 kVA<\/p>\n<\/li>\n<li data-start=\"2031\" data-end=\"2057\">\n<p data-start=\"2033\" data-end=\"2057\">Idle losses: 2 kW<\/p>\n<\/li>\n<li data-start=\"2058\" data-end=\"2088\">\n<p data-start=\"2060\" data-end=\"2088\">Load losses: 10 kW<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"2090\" data-end=\"2127\"><strong data-start=\"2090\" data-end=\"2125\">Calculation of efficiency at full load:<\/strong><\/p>\n<p data-start=\"2090\" data-end=\"2127\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-2377\" src=\"https:\/\/evernewtransformer.ru\/wp-content\/uploads\/2025\/09\/N3.png\" alt=\"\" width=\"763\" height=\"74\" srcset=\"https:\/\/evernewtransformer.ru\/wp-content\/uploads\/2025\/09\/N3.png 763w, https:\/\/evernewtransformer.ru\/wp-content\/uploads\/2025\/09\/N3-300x29.png 300w, https:\/\/evernewtransformer.ru\/wp-content\/uploads\/2025\/09\/N3-18x2.png 18w, https:\/\/evernewtransformer.ru\/wp-content\/uploads\/2025\/09\/N3-600x58.png 600w\" sizes=\"auto, (max-width: 763px) 100vw, 763px\" \/><\/p>\n<p data-start=\"2090\" data-end=\"2127\"><span style=\"font-size: 150%;\">Read more:<a href=\"https:\/\/evernewtransformer.ru\/en\/\u043e\u0431\u044f\u0437\u0430\u0442\u0435\u043b\u044c\u043d\u043e\u0435-\u0440\u0443\u043a\u043e\u0432\u043e\u0434\u0441\u0442\u0432\u043e-\u0434\u043b\u044f-\u043f\u0440\u0438\u043d\u044f\u0442\/\">A must-have guide for purchasing decisions: In-depth analysis of transformer selection and specifications for Russia<\/a><\/span><\/p>\n<p data-start=\"3316\" data-end=\"3504\">\u00a0<\/p>\n\t<div class=\"img has-hover x md-x lg-x y md-y lg-y\" id=\"image_318169514\">\n\t\t\t\t\t\t\t\t<div class=\"img-inner dark\" >\n\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"500\" src=\"https:\/\/evernewtransformer.ru\/wp-content\/uploads\/2025\/09\/\u042d\u043b\u0435\u043a\u0442\u0440\u0438\u0447\u0435\u0441\u043a\u0438\u0435-\u0442\u0440\u0430\u043d\u0441\u0444\u043e\u0440\u043c\u0430\u0442\u043e\u0440\u044b-\u0434\u043b\u044f-\u0440\u0430\u0441\u043f\u0440\u0435\u0434\u0435\u043b\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0445-\u0441\u0435\u0442\u0435\u0439-\u2013-\u041a\u0438\u0442\u0430\u0439\u0441\u043a\u0438\u0439-\u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c.webp\" class=\"attachment-large size-large\" alt=\"Energy Transformer electrical transformers for distribution networks, deliveries from China to Russia, Kazakhstan and Europe\" srcset=\"https:\/\/evernewtransformer.ru\/wp-content\/uploads\/2025\/09\/\u042d\u043b\u0435\u043a\u0442\u0440\u0438\u0447\u0435\u0441\u043a\u0438\u0435-\u0442\u0440\u0430\u043d\u0441\u0444\u043e\u0440\u043c\u0430\u0442\u043e\u0440\u044b-\u0434\u043b\u044f-\u0440\u0430\u0441\u043f\u0440\u0435\u0434\u0435\u043b\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0445-\u0441\u0435\u0442\u0435\u0439-\u2013-\u041a\u0438\u0442\u0430\u0439\u0441\u043a\u0438\u0439-\u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c.webp 900w, https:\/\/evernewtransformer.ru\/wp-content\/uploads\/2025\/09\/\u042d\u043b\u0435\u043a\u0442\u0440\u0438\u0447\u0435\u0441\u043a\u0438\u0435-\u0442\u0440\u0430\u043d\u0441\u0444\u043e\u0440\u043c\u0430\u0442\u043e\u0440\u044b-\u0434\u043b\u044f-\u0440\u0430\u0441\u043f\u0440\u0435\u0434\u0435\u043b\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0445-\u0441\u0435\u0442\u0435\u0439-\u2013-\u041a\u0438\u0442\u0430\u0439\u0441\u043a\u0438\u0439-\u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c-300x167.webp 300w, https:\/\/evernewtransformer.ru\/wp-content\/uploads\/2025\/09\/\u042d\u043b\u0435\u043a\u0442\u0440\u0438\u0447\u0435\u0441\u043a\u0438\u0435-\u0442\u0440\u0430\u043d\u0441\u0444\u043e\u0440\u043c\u0430\u0442\u043e\u0440\u044b-\u0434\u043b\u044f-\u0440\u0430\u0441\u043f\u0440\u0435\u0434\u0435\u043b\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0445-\u0441\u0435\u0442\u0435\u0439-\u2013-\u041a\u0438\u0442\u0430\u0439\u0441\u043a\u0438\u0439-\u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c-768x427.webp 768w, https:\/\/evernewtransformer.ru\/wp-content\/uploads\/2025\/09\/\u042d\u043b\u0435\u043a\u0442\u0440\u0438\u0447\u0435\u0441\u043a\u0438\u0435-\u0442\u0440\u0430\u043d\u0441\u0444\u043e\u0440\u043c\u0430\u0442\u043e\u0440\u044b-\u0434\u043b\u044f-\u0440\u0430\u0441\u043f\u0440\u0435\u0434\u0435\u043b\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0445-\u0441\u0435\u0442\u0435\u0439-\u2013-\u041a\u0438\u0442\u0430\u0439\u0441\u043a\u0438\u0439-\u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c-18x10.webp 18w, https:\/\/evernewtransformer.ru\/wp-content\/uploads\/2025\/09\/\u042d\u043b\u0435\u043a\u0442\u0440\u0438\u0447\u0435\u0441\u043a\u0438\u0435-\u0442\u0440\u0430\u043d\u0441\u0444\u043e\u0440\u043c\u0430\u0442\u043e\u0440\u044b-\u0434\u043b\u044f-\u0440\u0430\u0441\u043f\u0440\u0435\u0434\u0435\u043b\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0445-\u0441\u0435\u0442\u0435\u0439-\u2013-\u041a\u0438\u0442\u0430\u0439\u0441\u043a\u0438\u0439-\u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c-600x333.webp 600w\" sizes=\"auto, (max-width: 900px) 100vw, 900px\" \/>\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_318169514 {\n  width: 100%;\n}\n<\/style>\n\t<\/div>\n\t\n<h2 data-start=\"2203\" data-end=\"2245\"><span class=\"ez-toc-section\" id=\"5_%D0%9A%D0%B0%D0%BA_%D1%81%D0%BD%D0%B8%D0%B7%D0%B8%D1%82%D1%8C_%D0%BF%D0%BE%D1%82%D0%B5%D1%80%D0%B8_%D0%B8_%D0%BF%D0%BE%D0%B2%D1%8B%D1%81%D0%B8%D1%82%D1%8C_%D0%9A%D0%9F%D0%94\"><\/span>5. How to reduce losses and increase efficiency<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul data-start=\"2246\" data-end=\"2531\">\n<li data-start=\"2246\" data-end=\"2318\">\n<p data-start=\"2248\" data-end=\"2318\">Use of quality electrical steel in the magnetic core<\/p>\n<\/li>\n<li data-start=\"2319\" data-end=\"2377\">\n<p data-start=\"2321\" data-end=\"2377\">Use of copper windings with minimum resistance<\/p>\n<\/li>\n<li data-start=\"2378\" data-end=\"2443\">\n<p data-start=\"2380\" data-end=\"2443\">Efficient cooling (oil, air, combined)<\/p>\n<\/li>\n<li data-start=\"2444\" data-end=\"2531\">\n<p data-start=\"2446\" data-end=\"2531\">Optimal selection of the load mode (avoid idling or overloading)<\/p>\n<\/li>\n<\/ul>\n<h2 data-start=\"2538\" data-end=\"2554\"><span class=\"ez-toc-section\" id=\"%D0%97%D0%B0%D0%BA%D0%BB%D1%8E%D1%87%D0%B5%D0%BD%D0%B8%D0%B5\"><\/span>Conclusion<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"2555\" data-end=\"2623\">Correct calculation of transformer power, losses and efficiency allows:<\/p>\n<ul data-start=\"2624\" data-end=\"2750\">\n<li data-start=\"2624\" data-end=\"2671\">\n<p data-start=\"2626\" data-end=\"2671\">choose the right equipment for the right task,<\/p>\n<\/li>\n<li data-start=\"2672\" data-end=\"2709\">\n<p data-start=\"2674\" data-end=\"2709\">reduce operating costs,<\/p>\n<\/li>\n<li data-start=\"2710\" data-end=\"2750\">\n<p data-start=\"2712\" data-end=\"2750\">to ensure the reliability of the power grid.<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"2752\" data-end=\"2860\">Knowledge of these basics is useful to both engineers and electrical procurement and operations professionals.<\/p>\n<p data-start=\"2752\" data-end=\"2860\"><span style=\"font-size: 120%;\">Read more:<a href=\"https:\/\/evernewtransformer.ru\/en\/\u044d\u043d\u0435\u0440\u0433\u043e\u044d\u0444\u0444\u0435\u043a\u0442\u0438\u0432\u043d\u044b\u0435-\u0441\u0438\u043b\u043e\u0432\u044b\u0435-\u0442\u0440\u0430\u043d\u0441\u0444\u043e\u0440\u043c\/\">Energy Efficient Power Transformers: Innovations for Loss Reduction and Sustainability of Power Systems<\/a><\/span><\/p>\n<h2 data-start=\"2867\" data-end=\"2903\"><span class=\"ez-toc-section\" id=\"%D0%A7%D0%B0%D1%81%D1%82%D0%BE_%D0%B7%D0%B0%D0%B4%D0%B0%D0%B2%D0%B0%D0%B5%D0%BC%D1%8B%D0%B5_%D0%B2%D0%BE%D0%BF%D1%80%D0%BE%D1%81%D1%8B_FAQ\"><\/span>Frequently Asked Questions (FAQ)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"2904\" data-end=\"3019\"><strong data-start=\"2904\" data-end=\"2982\">\u2753 What efficiency is considered normal for a modern power transformer?<\/strong><br data-start=\"2982\" data-end=\"2985\" \/>\u27a1 Usually in the range of <strong data-start=\"3006\" data-end=\"3016\">98-99%<\/strong>.<\/p>\n<p data-start=\"3021\" data-end=\"3170\"><strong data-start=\"3021\" data-end=\"3059\">\u2753 Does temperature affect losses?<\/strong><br data-start=\"3059\" data-end=\"3062\" \/>\u27a1 Yes, as the temperature rises, the winding resistance increases, resulting in higher load losses.<\/p>\n<p data-start=\"3172\" data-end=\"3309\"><strong data-start=\"3172\" data-end=\"3223\">\u2753 Can idle loss be eliminated completely?<\/strong><br data-start=\"3223\" data-end=\"3226\" \/>\u27a1 No, but they can be minimized by quality magnet core materials.<\/p>\n<p data-start=\"3316\" data-end=\"3504\">\ud83d\udccc power transformer, transformer power, transformer losses, transformer efficiency, transformer calculation, transformer efficiency<\/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> 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Their correct calculation determines the reliability of the power system, economic efficiency and the service life of the equipment. In this article we will look at how to determine the transformer capacity, calculate losses and estimate its efficiency. 1. Nominal transformer capacity The transformer capacity (S, kVA) shows what electrical load it is capable of serving. The formula [...]","protected":false},"author":3,"featured_media":2370,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[216,227,225,196,226,224,189,230,229,228],"class_list":["post-2368","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized","tag-216","tag-227","tag-225","tag-196","tag-226","tag-224","tag-189","tag-230","tag-229","tag-228"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u041e\u0441\u043d\u043e\u0432\u044b \u0440\u0430\u0441\u0447\u0451\u0442\u0430 \u0442\u0440\u0430\u043d\u0441\u0444\u043e\u0440\u043c\u0430\u0442\u043e\u0440\u0430: \u043c\u043e\u0449\u043d\u043e\u0441\u0442\u0438, \u043f\u043e\u0442\u0435\u0440\u044c \u0438 \u041a\u041f\u0414<\/title>\n<meta name=\"description\" content=\"\u0423\u0437\u043d\u0430\u0439\u0442\u0435 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