{"id":10845,"date":"2026-08-29T23:43:10","date_gmt":"2026-08-29T15:43:10","guid":{"rendered":"https:\/\/q8bbzjnpm5.wpdns.site\/?p=10845"},"modified":"2026-08-29T23:43:10","modified_gmt":"2026-08-29T15:43:10","slug":"research-and-development-and-application-prospects-of-new-energy-efficient-transformers","status":"publish","type":"post","link":"https:\/\/subian-electric.com\/de\/news\/research-and-development-and-application-prospects-of-new-energy-efficient-transformers\/","title":{"rendered":"Forschung und Entwicklung sowie Anwendungsaussichten neuer energieeffizienter Transformatoren"},"content":{"rendered":"<p>Der Cheftechniker eines Industrieparks in Vietnam beobachtete ein Paar 2.000 kVA Transformatoren, die unter einer durchschnittlichen Last von 35% summten \u2013 ein Lastprofil, das ihre Leerlaufverluste zu den gr\u00f6\u00dften kontrollierbaren Kosten der elektrischen Betriebsabl\u00e4ufe des Parks machte. Er hatte die Zahlen bereits \u00fcberpr\u00fcft: Ein Transformator aus den 1990er Jahren verlor 3.200\u20134.500 W im Leerlauf; ein moderner betrieb bei einem Verlust von 1.600\u20132.400 W; ein amorpher Kerntransformator verlor nur 800\u20131.200 W. Der Expansionsplan des Industrieparks gab ihm eine einzigartige Gelegenheit, in neue Transformatoren zu investieren, und diesmal gab es zum ersten Mal im Lieferantenverzeichnis neue Technologien, die die vorherige Generation nicht sehen w\u00fcrde: amorphe Kerne, nat\u00fcrliche Ester\u00f6le, Anschl\u00fcsse f\u00fcr intelligentes Monitoring von Transformatoren und Effizienzklassen, die durch neue Standards bestimmt wurden.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-10846\" src=\"https:\/\/subian-electric.com\/wp-content\/uploads\/2026\/08\/subian_energy_efficient_transformers_blog_hero.webp\" alt=\"\" width=\"1536\" height=\"1024\" \/><\/p>\n<h2>Was ist ein energieeffizienter Transformator?<\/h2>\n<p>Energieeffiziente Transformatoren werden definiert als Transformatoren mit beispiellosen Verlusten, die weit unter den branchentypischen Verlusten f\u00fcr ihre Nennleistung liegen. Entweder verwenden sie neue Kernmaterialien oder haben innovative Designs (oder beides).<\/p>\n<p>Die quantitative Definition ist recht einfach. Sie umfasst niedrige Leerlaufverluste und niedrige Lastverluste bei derselben Nennleistung und Impedanz, wie durch die Routinepr\u00fcfungen gem\u00e4\u00df IEC 60076 best\u00e4tigt. Es gibt nur ein Merkmal, das ein Transformator haben muss, um als energieeffizient zu gelten: Er muss in der aktuellen Klasse von Hochleistungsprodukten (Stufe 1 in GB 20052, Stufe 2 in der EU-Ecodesign-Richtlinie oder die h\u00f6chste DOE-Klasse) betrieben werden. Alles andere ist nur Marketing.<\/p>\n<h2 id=\"rd\">Wo die F&amp;E stattfindet<\/h2>\n<p>Die F&amp;E von Transformatoren konzentriert sich heute auf eine kleine Anzahl von Fronten, und jede greift einen anderen Anteil des Verlustbudgets an:<\/p>\n<table>\n<thead>\n<tr>\n<th>F&amp;E-Front<\/th>\n<th>Ziel<\/th>\n<th>Typischer Gewinn<\/th>\n<th>Reife<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Amorphe Metallkerne<\/td>\n<td>Leerlaufverlust<\/td>\n<td>60\u201370% Reduktion<\/td>\n<td>Serienproduktion in China, weltweit wachsend<\/td>\n<\/tr>\n<tr>\n<td>Hochpermeable GOES, d\u00fcnnere St\u00e4rken<\/td>\n<td>Leerlaufverlust<\/td>\n<td>15\u201325% Reduktion<\/td>\n<td>Standardpraxis<\/td>\n<\/tr>\n<tr>\n<td>Nat\u00fcrliche Ester\u00f6le<\/td>\n<td>Lebenssicherheit, Nachhaltigkeit, Verlust bei hoher Temperatur<\/td>\n<td>H\u00f6here thermische F\u00e4higkeit, biologisch abbaubar<\/td>\n<td>Kommerziell, schnell wachsend<\/td>\n<\/tr>\n<tr>\n<td>Niedrigverlustwicklungen (gr\u00f6\u00dfere Leiter, Folie f\u00fcr LV)<\/td>\n<td>Lastverlust<\/td>\n<td>10\u201320% Reduktion<\/td>\n<td>Standardpraxis<\/td>\n<\/tr>\n<tr>\n<td>Eingebettete Sensorik und digitaler Zwilling<\/td>\n<td>Betriebs- und Wartungsverluste<\/td>\n<td>Verl\u00e4ngerte Lebensdauer, vermiedene Ausf\u00e4lle<\/td>\n<td>Neu aufkommend, zunehmend in der 10kV+ Klasse<\/td>\n<\/tr>\n<tr>\n<td>Stufenlap- und Gehrungskernverbindungen<\/td>\n<td>Leerlaufverluste und Ger\u00e4usch<\/td>\n<td>5\u201310% Verlust, 3\u20136 dB(A) Ger\u00e4usch<\/td>\n<td>Standard in Qualit\u00e4tsfabriken<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Der bemerkenswerte Wandel besteht darin, dass der gr\u00f6\u00dfte technische Hebel \u2013 der amorphe Kern \u2013 aus dem Labor in die Serienproduktion \u00fcbergegangen ist, angetrieben durch Effizienzvorschriften und staatliche Anreize. Die wirtschaftliche Konsequenz ist, dass amorphe Kerntransformatoren nicht mehr exotisch sind; sie sind eine g\u00e4ngige Option mit vorhersehbarem R\u00fcckfluss.<\/p>\n<h2 id=\"amorphous\">Amorphe Legierungskerne: Die Flagship-Technologie<\/h2>\n<p>Ein amorphes Metall ist eine Eisenlegierung, die so schnell abgek\u00fchlt wurde, dass ihre Atome keine kristalline Struktur gebildet haben. Im Vergleich zu traditionellem, kornorientiertem Stahl erm\u00f6glicht die amorphe Struktur eine m\u00fchelosere Magnetisierung, weshalb die Leerlaufverluste auf etwa 30\u201340% der Verluste in konventionellem Stahl reduziert werden k\u00f6nnen. Die Nachteile sind bekannt: das Band ist d\u00fcnner und fragiler, die Kerne sind gr\u00f6\u00dfer und die Anfangskosten sind h\u00f6her.<\/p>\n<p>Repr\u00e4sentativer Verlustvergleich f\u00fcr einen 1.000 kVA 10\/0,4 kV Verteilungstransformator:<\/p>\n<table>\n<thead>\n<tr>\n<th>Kerntechnologie<\/th>\n<th>Leerlaufverlust<\/th>\n<th>Lastverlust (indikativ)<\/th>\n<th>Relativer Kernpreis<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Konventionelles GOES (altes Design)<\/td>\n<td>500\u20132.100 W<\/td>\n<td>000\u201312.000 W<\/td>\n<td>Basislinie<\/td>\n<\/tr>\n<tr>\n<td>Hochpermeables 0,23 mm GOES<\/td>\n<td>700\u20131.100 W<\/td>\n<td>500\u201311.500 W<\/td>\n<td>+5\u201310%<\/td>\n<\/tr>\n<tr>\n<td>Amorphes Metall<\/td>\n<td>350\u2013500 W<\/td>\n<td>500\u201311.500 W<\/td>\n<td>+20\u201340%<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>In Bezug auf die Kosten generiert der amorphe Kerntransformator Einsparungen, die j\u00e4hrlich von etwa $440 bis $610 hinsichtlich der Leerlaufverluste im Vergleich zur erwarteten Leistung des besten GOES-Transformators reichen. Wenn der 20-Jahres-Zeitraum mit einem Diskontsatz von 8% berechnet wird, stellt sich heraus, dass der Barwert dieser Einsparung etwa $4.300 bis $6.000 gegen\u00fcber dem ersten Kostenaufschlag eines neuen Transformators betr\u00e4gt, der voraussichtlich zwischen $1.500 und $3.000 liegen wird.<\/p>\n<h2 id=\"ester\">Nat\u00fcrliche Ester\u00f6le und Fortschritte in der Isolierung<\/h2>\n<p>Nat\u00fcrliche Ester\u00f6le, die pflanzliches Material wie Raps oder Sojabohnen verwenden, heben sich als der zweite gro\u00dfe Trend in der Technologie der energieeffizienten Transformatoren hervor. W\u00e4hrend sie keine bessere elektrische Leistung als Mineral\u00f6le bieten, bieten sie zwei wesentliche Vorteile in Bezug auf Energie und Nachhaltigkeit.<\/p>\n<p>First, they have greater thermal performance, as natural ester oils can function at higher temperature increases, thus allowing their insulation systems to operate more effectively under higher loads \u2014 operating cooler increases the lifespan of paper insulation.<\/p>\n<p>Second, they provide the benefit of biodegradability and fire safety \u2014 ester oils naturally break down and have significantly larger flash points than traditional oil, which reduces the risk of fire as well as associated insurance and environmental leakage costs.<\/p>\n<p>Many innovative green transformers combine an amorphous core design with natural ester oils. This innovation minimizes energy loss by utilizing biodegradable insulation made from natural ester oils, however the combination typically increases production costs between 30% to 55% as opposed to conventional transformers.<\/p>\n<h2 id=\"smart\">Smart Transformers and Condition Monitoring<\/h2>\n<p>In &#8220;new&#8221; energy-efficient transformers, the term &#8220;new&#8221; is now synonymous with intelligence. Monitoring systems are using information collected by embedded sensors that monitor oil and winding temperatures, gas in oil and partial discharge.<\/p>\n<p>Real time Transformer efficiency monitoring shows operational loss metrics as opposed to nameplate losses.<\/p>\n<p>Moreover, predictive maintenance using dissolved gas readings (according to IEC 60599) detects failures years before they can occur.<\/p>\n<p>Thanks to smart features, real-time dynamic loading can provide a safe operation well beyond nameplate rating if it is within acceptable insulation condition limits per IEC 60076-7.<\/p>\n<p>The impact of improved technology may be indirect but significant, saving $100,000\u2013$500,000 in repair, replacement, and downtime costs due to only one mid-life failure of 10 MVA transformer.<\/p>\n<h2 id=\"standards\">Efficiency Classes and Standards<\/h2>\n<p>New technology only becomes a product when a standard says it is. The current framework:<\/p>\n<table>\n<thead>\n<tr>\n<th>Standard \/ rule<\/th>\n<th>Markt<\/th>\n<th>Class structure<\/th>\n<th>Status<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>GB 20052-2020<\/td>\n<td>China<\/td>\n<td>Grades 1\u20133, distribution transformers<\/td>\n<td>Grade 2 baseline; grade 1 for incentives<\/td>\n<\/tr>\n<tr>\n<td>EU Ecodesign 2019\/1783<\/td>\n<td>EU<\/td>\n<td>Tier 1 and tier 2 loss limits<\/td>\n<td>Tier 2 in force since July 2024<\/td>\n<\/tr>\n<tr>\n<td>US DOE 10 CFR 431<\/td>\n<td>Vereinigte Staaten<\/td>\n<td>Minimum efficiency classes<\/td>\n<td>In force; revisions adopted for 2024\u20132026<\/td>\n<\/tr>\n<tr>\n<td>IEC 60076 (all parts)<\/td>\n<td>International<\/td>\n<td>Rating and testing baseline<\/td>\n<td>Always applicable alongside efficiency rules<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Due to the fact that standards are always changing, it means that there&#8217;s always going to be a market for R&amp;D investing. In simple terms, every time the standards get stricter, the &#8220;premium&#8221; technologies become regulations; that means that there&#8217;s a new &#8220;premium&#8221; being developed in the lab. It is recommended for consumers to read the grade according to the standard and not the product brochure.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-10847\" src=\"https:\/\/subian-electric.com\/wp-content\/uploads\/2026\/08\/subian_energy_efficient_transformers_article_figure_1.webp\" alt=\"\" width=\"1536\" height=\"1024\" \/><\/p>\n<h2 id=\"applications\">Application Prospects by Sector<\/h2>\n<p>Where new energy-efficient transformers win fastest is determined by load factor and hours of operation:<\/p>\n<table>\n<thead>\n<tr>\n<th>Anwendung<\/th>\n<th>Typical load profile<\/th>\n<th>Best technology<\/th>\n<th>Expected payback<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Distribution grids (24\/7 energized)<\/td>\n<td>Low-to-medium load factor<\/td>\n<td>Amorphous core, grade 1\u20132<\/td>\n<td>3\u20137 years<\/td>\n<\/tr>\n<tr>\n<td>Rechenzentren<\/td>\n<td>High load factor, 24\/7<\/td>\n<td>Amorphous core + monitoring<\/td>\n<td>2\u20135 Jahre<\/td>\n<\/tr>\n<tr>\n<td>Krankenh\u00e4user und kritische Einrichtungen<\/td>\n<td>Continuous, redundancy-heavy<\/td>\n<td>Grade 1\u20132, ester oil where indoor<\/td>\n<td>4\u20138 years plus resilience value<\/td>\n<\/tr>\n<tr>\n<td>Industrial continuous processes<\/td>\n<td>High load factor<\/td>\n<td>Amorphous core, low-loss winding<\/td>\n<td>3\u20136 Jahre<\/td>\n<\/tr>\n<tr>\n<td>Renewable plant collection<\/td>\n<td>Variable, high peak<\/td>\n<td>High-efficiency step-up units<\/td>\n<td>4\u20138 Jahre<\/td>\n<\/tr>\n<tr>\n<td>Seasonal\/light loads<\/td>\n<td>Low hours, low load factor<\/td>\n<td>Grade 2 GOES (value optimum)<\/td>\n<td>6\u201312 Jahre<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>The application outlook is strongly positive for amorphous-core distribution transformers in grids, for smart features in the 10\u2013110kV class, and for ester-oil units in urban and environmentally sensitive locations. The same list defines where the R&amp;D budget of the industry is flowing.<\/p>\n<h2 id=\"brands\">Available Products and Price Ranges<\/h2>\n<p>Indicative FOB pricing for a 1,000 kVA 10\/0.4 kV new energy-efficient distribution transformer by brand:<\/p>\n<table>\n<thead>\n<tr>\n<th>Marke<\/th>\n<th>Herkunft<\/th>\n<th>Preis der Klasse 2<\/th>\n<th>Preis der Klasse 1 \/ amorpher Preis<\/th>\n<th>Ester-oil premium<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Hitachi Energie<\/td>\n<td>Japan\/Weltweit<\/td>\n<td>$9.000\u2013$12.500<\/td>\n<td>$12.500\u2013$18.000<\/td>\n<td>+15\u201325%<\/td>\n<\/tr>\n<tr>\n<td>ABB<\/td>\n<td>Schweiz\/Weltweit<\/td>\n<td>$8.500\u2013$12.000<\/td>\n<td>$12.000\u2013$17.000<\/td>\n<td>+15\u201325%<\/td>\n<\/tr>\n<tr>\n<td>Siemens Energie<\/td>\n<td>Deutschland\/Weltweit<\/td>\n<td>$8.000\u2013$11.500<\/td>\n<td>$11.500\u2013$16.500<\/td>\n<td>+15\u201325%<\/td>\n<\/tr>\n<tr>\n<td>Schneider Electric<\/td>\n<td>Frankreich\/Weltweit<\/td>\n<td>$7.500\u2013$11.000<\/td>\n<td>$11.000\u2013$15.500<\/td>\n<td>+15\u201325%<\/td>\n<\/tr>\n<tr>\n<td>Jiangsu Subian Electric Power<\/td>\n<td>China<\/td>\n<td>$4.000\u2013$7.000<\/td>\n<td>$5.500\u2013$9.500<\/td>\n<td>+10\u201320%<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Prices vary with rating, loss class, tap changer, accessories, raw material prices, and delivery terms; treat these as planning ranges, not firm quotes.<\/p>\n<p>The premium tier&#8217;s price is anchored in global test programs, long field histories, and service networks. The Chinese tier has made the same efficiency classes \u2014 amorphous cores, grade 1 losses, ester-oil options \u2014 available at 40\u201350% lower first cost, which is precisely what has accelerated their adoption in cost-sensitive and emerging markets. <strong>Jiangsu Subian Electric Power<\/strong> ist ein chinesischer <strong>Transformatorenhersteller<\/strong> und <strong>energy-saving transformer<\/strong> producer building grade 1\u20132 liquid-immersed, dry-type, and amorphous-core transformers from 10 kVA to 63 MVA, tested to IEC 60076 and shipped with routine test reports. Subian&#8217;s energy-efficient range, including ester-oil and smart-monitoring options, is documented at <a href=\"https:\/\/subian-electric.com\/de\/\">subian-electric.com<\/a>.<\/p>\n<h2 id=\"outlook\">The Outlook to 2030<\/h2>\n<p>Three trends will shape the upcoming decade. To begin with, amorphous-core transformers will change from the premium category to that of default in distributor applications continuously loaded, influenced by the next stages of efficiency tightening. The next trend is the introduction of monitoring as a means of safeguarding efficiency and reliability.<br \/>\nWhen it comes to the third trend, the carbon content will become part of the product. In this case, the carbon embodied in the product and the scores of the eco-labeling will reward manufacturers who apply eco-friendly manufacturing processes.<br \/>\nWhen it comes to customers, the application of these trends means that the transformer you buy today will have to meet higher standards in 2030.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-10848\" src=\"https:\/\/subian-electric.com\/wp-content\/uploads\/2026\/08\/subian_energy_efficient_transformers_article_figure_2.webp\" alt=\"\" width=\"1536\" height=\"1024\" \/><\/p>\n<h2 id=\"faq\">H\u00e4ufig gestellte Fragen<\/h2>\n<h3>What is the most efficient type of transformer available today?<\/h3>\n<p>For distribution ratings, the amorphous-core transformer leads: no-load loss of 350\u2013500 W for a 1,000 kVA unit versus 700\u20131,100 W for a high-permeability GOES unit and 1,500\u20132,100 W for a 1990s design. Efficiency classes are codified in GB 20052 (grade 1\u20133) and EU Ecodesign 2019\/1783 (tier 1\u20132).<\/p>\n<h3>How much do new energy-efficient transformers cost?<\/h3>\n<p>A 1,000 kVA grade 2 unit runs about $4,000\u2013$7,000 FOB from Chinese manufacturers; an amorphous-core grade 1 unit runs $5,500\u2013$9,500, plus 10\u201325% more for natural ester oil. Premium European and Japanese brands price 50\u201380% higher at the same class.<\/p>\n<h3>Are amorphous core transformers worth the extra cost?<\/h3>\n<p>In applications loaded 24\/7 \u2014 grids, data centers, hospitals, continuous industry \u2014 yes. The 20\u201340% premium pays back in 3\u20138 years through 60\u201370% lower no-load loss, and the saving compounds for 25\u201335 years. In lightly loaded seasonal sites, a grade 2 GOES unit is usually the value optimum.<\/p>\n<h3>What is the life expectancy of a new energy-efficient transformer?<\/h3>\n<p>25\u201335 years with routine maintenance. Natural ester oil and lower operating temperatures extend insulation life; every 6K reduction in hot-spot temperature roughly doubles paper life. Smart monitoring of temperature and dissolved gas further protects the investment.<\/p>\n<h3>Do new transformers pay for themselves?<\/h3>\n<p>Usually yes on a total cost of ownership basis. A modern grade 1\u20132 unit versus a 1990s unit saves $800\u2013$1,500\/year in no-load loss alone at $0.08\u2013$0.10\/kWh for 1,000 kVA, giving 3\u20138-year paybacks \u2014 before counting avoided failures, subsidies, and green procurement preference.<\/p>\n<h2 id=\"references\">Referenzen<\/h2>\n<ul>\n<li><a href=\"https:\/\/webstore.iec.ch\/publication\/637\" rel=\"nofollow noopener\" target=\"_blank\">IEC 60076-1: Leistungstransformatoren \u2013 Allgemeines<\/a> \u2014 International rating and testing baseline for all new transformers.<\/li>\n<li><a href=\"https:\/\/openstd.samr.gov.cn\/\" rel=\"nofollow noopener\" target=\"_blank\">GB 20052: Energieeffizienzklassen f\u00fcr Leistungstransformatoren<\/a> \u2014 The grade structure behind amorphous and grade 1 designs in China.<\/li>\n<li><a href=\"https:\/\/eur-lex.europa.eu\/legal-content\/EN\/TXT\/?uri=CELEX:32019R1783\" rel=\"nofollow noopener\" target=\"_blank\">EU-Ecodesign-Verordnung 2019\/1783<\/a> \u2014 EU efficiency tiers that gate market access.<\/li>\n<li><a href=\"https:\/\/www.energy.gov\/eere\/amo\/transformer-efficiency\" rel=\"nofollow noopener\" target=\"_blank\">US DOE-Programm zur Effizienz von Transformatoren<\/a> \u2014 North American efficiency classes and loss economics.<\/li>\n<li><a href=\"https:\/\/www.iea.org\/topics\/energy-efficiency\" rel=\"nofollow noopener\" target=\"_blank\">IEA-Programm zur Energieeffizienz<\/a> \u2014 Analysis of transformer loss share and technology outlook.<\/li>\n<li><a href=\"https:\/\/www.hitachienergy.com\/products-and-solutions\/transformers\" rel=\"nofollow noopener\" target=\"_blank\">Hitachi Energy Transformatorenportfolio<\/a> \u2014 Reference for premium-tier energy-efficient transformer offerings.<\/li>\n<li><a href=\"https:\/\/subian-electric.com\/de\/\" rel=\"nofollow\">Offizielle Website von Jiangsu Subian Electric Power<\/a> \u2014 Grade 1\u20132, amorphous-core, and ester-oil transformer range.<\/li>\n<\/ul>\n<h2 id=\"conclusion\">Fazit<\/h2>\n<p>Kernmaterialien, <strong>energy-efficient transformers<\/strong> are not a future concept \u2014 they are a maturing product line with documented loss data, standardised efficiency classes, and proven paybacks. The R&amp;D agenda is clear: amorphous cores, natural ester insulation, and smart monitoring, all governed by efficiency standards that keep tightening. The application prospects are strongest wherever transformers run continuously, which is where most of the world&#8217;s transformer losses occur.<\/p>\n<p>Wichtige Erkenntnisse:<\/p>\n<ul>\n<li>Amorphous cores cut no-load loss 60\u201370% and are now volume-production, not laboratory technology.<\/li>\n<li>Efficiency classes in GB 20052, EU Ecodesign, and US DOE gate what counts as &#8220;energy-efficient.&#8221;<\/li>\n<li>Paybacks of 3\u20138 years in continuously loaded applications, with smart monitoring protecting the asset.<\/li>\n<li>Buy one class above the minimum to avoid obsolescence at the next standards revision.<\/li>\n<\/ul>\n<p>If you are upgrading or expanding your transformer fleet, <strong>Jiangsu Subian Electric Power<\/strong> supplies GB 20052 grade 1\u20132 and amorphous-core energy-efficient transformers tested to IEC 60076, with ester-oil and monitoring options, at export-friendly prices. Review the range at <a href=\"https:\/\/subian-electric.com\/de\/\">subian-electric.com<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"<p>The chief engineer of an industrial park in Vietnam watched a pair of 2,000 kVA transformers humming under a 35% average load \u2013 a load profile that made their no-load losses the biggest controllable cost of the park&#8217;s electrical operations. He had already checked the figures: a transformer dating back to the 1990s was losing [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":10846,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[77],"tags":[],"class_list":["post-10845","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/subian-electric.com\/de\/wp-json\/wp\/v2\/posts\/10845","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/subian-electric.com\/de\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/subian-electric.com\/de\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/subian-electric.com\/de\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/subian-electric.com\/de\/wp-json\/wp\/v2\/comments?post=10845"}],"version-history":[{"count":2,"href":"https:\/\/subian-electric.com\/de\/wp-json\/wp\/v2\/posts\/10845\/revisions"}],"predecessor-version":[{"id":11005,"href":"https:\/\/subian-electric.com\/de\/wp-json\/wp\/v2\/posts\/10845\/revisions\/11005"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/subian-electric.com\/de\/wp-json\/wp\/v2\/media\/10846"}],"wp:attachment":[{"href":"https:\/\/subian-electric.com\/de\/wp-json\/wp\/v2\/media?parent=10845"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/subian-electric.com\/de\/wp-json\/wp\/v2\/categories?post=10845"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/subian-electric.com\/de\/wp-json\/wp\/v2\/tags?post=10845"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}