{"id":1975,"date":"2026-07-01T16:32:44","date_gmt":"2026-07-01T08:32:44","guid":{"rendered":"https:\/\/lbajiele.com\/?p=1975"},"modified":"2026-07-01T16:32:47","modified_gmt":"2026-07-01T08:32:47","slug":"heavy-duty-step-down-power-transformers-for-mining-steel-mills","status":"publish","type":"post","link":"https:\/\/lbajiele.com\/id\/blog\/heavy-duty-step-down-power-transformers-for-mining-steel-mills\/","title":{"rendered":"Transformator Daya Penurun Tegangan Tugas Berat untuk Pertambangan &amp; Pabrik Baja"},"content":{"rendered":"<p>With the continuing growth of deep global mining and steel production using electric arc furnaces (EAF), <a href=\"https:\/\/lbajiele.com\/id\/products\/\">step-down power transformers<\/a> will be essential for dependable power transmission.<\/p>\n<p>According to the IEA, total investment in power grids globally exceeded USD310 billion in 2023, with upgrade of distribution transformers being the highest priority. Mining and primary metals (both of which are considered among the most \u2018heavy duty\u2019 types of electricity users) require extremely stable voltage as verified by current U.S. EIA data. Procurement teams that must evaluate heavy duty power transformers have to consider two things: first, that the standard types of products cannot withstand repeated impact from SAG mill operations and cannot handle the excessive flicker associated with EAF\u2019s, and, second, that most suppliers\u2019 ability to support their claims of having \u201cindustrial grade\u201d transformers is not typically supported by independently validated third-party data. Additionally, procuring large quantities of transformers may also expose procurement teams to additional risk by having transformers subjected to conditions such as dust, humidity, and high altitude on-site.<\/p>\n<p>A comprehensive overview of manufacturing a step-up transformer suitable for extreme environments in the mining and steel mill industries. The article goes through the different stages of the transformer engineering process, including load modeling, winding production, enclosure design and testing, and lifetime support.<\/p>\n<h2>Modeling Loads and Assessing Engineering \u2013 Working with EPC&#8217;s to Define the withstand Parameters For EAF Flicker and Crusher Surges<\/h2>\n<p>Quantifying true loads is the first step of determining reliability. The importance of early engagement with EPC companies (e.g. Hatch, Bechtel) and the mine owner&#8217;s engineers is critical.<\/p>\n<p>Because of the heavy current draw from a SAG mill at start-up (i.e., as much as five to seven times rated current), there is a very deep voltage dip. Also, while operating an AC EAF during scrap melts, short-circuits often occur, and there is frequent voltage flicker (&gt;\u00b120 %), as well as a number of different frequencies that can create harmonics that affect the electrical systems supplying power to both the mining and steel mill in three main ways:<\/p>\n<ul>\n<li><strong>Sensitive equipment disruption:<\/strong> Voltage fluctuations caused by flicker can disrupt sensitive electronic equipment and variable frequency drives (VFDs) leading to unexpected shutdowns.<\/li>\n<li><strong>Protection system nuisance tripping:<\/strong> Maloperation of protection relays on adjacent feeders may be caused by repeated voltage fluctuations, which will expand the impact of the disturbance through the factory.<\/li>\n<li><strong>Grid\u2011compliance risk:<\/strong> Serious guidelines are set forth for flicker severity limits (Pst, Plt) by IEC 61000\u20114\u201115 that, if exceeded, could cause failure to obtain approved grid connection for the project.<\/li>\n<\/ul>\n<p>Correctly defining EAF flicker during initial design phase ensures that no power quality issues will arise post operation. Collecting waveform data at site level and transient simulations provide the baseline specs, including: primary voltage of 13.8 kV or 34.5 kV, secondary voltage options of 480V, 600 V or 690 V, and capacity from 2,500 kVA &#8211; 15,000kVA. With impedance levels being much higher (8-12% compared to standard distribution unit of 4-5%) for limiting fault current &amp; stabilizing the electrical arc; see below for how each load type affects design parameters.<\/p>\n<table>\n<caption style=\"caption-side: bottom; text-align: left; font-style: italic; margin-top: 0.5rem;\">Table \u2460: Typical Mining\/Steel Mill Loads versus Transformer Design Requirements<\/caption>\n<thead>\n<tr>\n<th>Equipment Type<\/th>\n<th>Load Characteristics<\/th>\n<th>Core Requirement for Step\u2011Down Transformer<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>SAG Mill \/ Ball Mill<\/td>\n<td>High starting torque, 5\u20137\u00d7 inrush<\/td>\n<td>High mechanical strength, vacuum\u2011impregnated winding<\/td>\n<\/tr>\n<tr>\n<td>Crusher<\/td>\n<td>Cyclic shock loads<\/td>\n<td>Reinforced core clamping, high short\u2011circuit withstand<\/td>\n<\/tr>\n<tr>\n<td>AC Electric Arc Furnace<\/td>\n<td>Frequent short circuits, \u00b120 % flicker, high harmonics<\/td>\n<td>8\u201312 % impedance, OLTC, Class H insulation<\/td>\n<\/tr>\n<tr>\n<td>Rolling Mill Main Drive<\/td>\n<td>Rapid cyclic overload<\/td>\n<td>Large thermal capacity, low impedance variation<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<div class=\"note\"><em>Note \u2460: Voltage flicker is the rapid fluctuation of the voltage envelope. IEC 61000\u20114\u201115 defines strict limits; exceeding them causes lighting flicker and equipment trips.<\/em><\/div>\n<div><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-1977 aligncenter\" src=\"https:\/\/lbajiele.com\/wp-content\/uploads\/2026\/07\/step-down-powertransformer.webp\" alt=\"\" width=\"2560\" height=\"1712\" srcset=\"https:\/\/lbajiele.com\/wp-content\/uploads\/2026\/07\/step-down-powertransformer.webp 2560w, https:\/\/lbajiele.com\/wp-content\/uploads\/2026\/07\/step-down-powertransformer-300x201.webp 300w, https:\/\/lbajiele.com\/wp-content\/uploads\/2026\/07\/step-down-powertransformer-1024x685.webp 1024w, https:\/\/lbajiele.com\/wp-content\/uploads\/2026\/07\/step-down-powertransformer-768x514.webp 768w, https:\/\/lbajiele.com\/wp-content\/uploads\/2026\/07\/step-down-powertransformer-1536x1027.webp 1536w, https:\/\/lbajiele.com\/wp-content\/uploads\/2026\/07\/step-down-powertransformer-2048x1370.webp 2048w\" sizes=\"auto, (max-width: 2560px) 100vw, 2560px\" \/><\/div>\n<h2>Impact Resistant Winding Manufacture &#8211; Using Grain Oriented Silicon Steel and then Using Epoxy Cast to Vacuum.<\/h2>\n<p>Once you determine the <a href=\"https:\/\/lbajiele.com\/id\/products\/\">electrical specifications of the transformer<\/a>, the permanent strength of the transformer exists within the winding. For the core, 0.23 mm grain-oriented silicon steel (for example, Nippon Steel or POSCO grade) in a step-lap stacked construction will reduce losses and magnetostrictive noise to comply with the MSHA regulations for underground mining.<\/p>\n<p>The copper foil is very wide and made from DuPont\u2122 Nomex\u00ae meta-aramid paper, providing Class H insulation to the low volage winding that feels the most electrodynamic forces and has sufficient thermal margin for the effects of harmonic heating (200 \u00b0C at the hot spot).<\/p>\n<p>A total vacuum epoxy cast is produced on the complete winding. The vacuum epoxy casting process uses three stages that have been precisely controlled and therefore forms a reliable process.<\/p>\n<ul>\n<li><strong>Vacuum degassing:<\/strong> In order to remove moisture, (or other trapped air) from the insulation layers around the wires of the winding, the winding is preheated to 60-80\u00baC and evacuated to less than 100 Pa. This process takes out all the moisture and other trapped air from the micro voids which ultimately lead to partial discharge.<\/li>\n<li><strong>Pressure impregnation:<\/strong> Liquid epoxy resin infiltrates the tiniest spaces between the turns and layers through the application of a pressure difference. This creates an uninterrupted void-free body of insulating material with mechanical strengths that are multiples of that of a typical coil; and provides an insulated body of insulation that is completely filled throughout.<\/li>\n<li><strong>Staged curing:<\/strong> Crosslinking proceeds under stepped temperature control at 100\u2013140 \u00b0C. This prevents shrinkage stress from damaging the insulation and ensures long\u2011term dimensional stability under thermal cycling.<\/li>\n<\/ul>\n<p>The result is a monolithic structure that withstands repeated 5\u20137\u00d7 inrush shocks and controls partial discharge below 5 pC\u2014meaning virtually no internal voids and dramatically slowed insulation aging. EPRI studies indicate that such vacuum\u2011cast dry\u2011type transformers can achieve over 15 years of fault\u2011free operation in harsh environments.<\/p>\n<h2>Protective Enclosures and OEM Customization \u2014 Solutions for Explosion Protection, Salt Spray, and High Altitude<\/h2>\n<p>The epoxy\u2011cast body resists moisture and flame, but the external enclosure must match the environment.<\/p>\n<p>In underground coal mines, enclosures require <strong>MSHA<\/strong> or <strong>IECEx<\/strong> explosion\u2011proof certification. In coastal steel mills or open\u2011pit copper mines, a sealed stainless\u2011steel enclosure rated <strong>IP55<\/strong> dan <strong>NEMA 4X<\/strong>, with an anti\u2011condensation heater, defends against salt spray and conductive dust. The protective capability of a NEMA 4X enclosure can be understood across four distinct levels:<\/p>\n<ul>\n<li><strong>Dust exclusion:<\/strong> The enclosure completely prevents the ingress of external dust, including conductive metallic particles.<\/li>\n<li><strong>Water resistance:<\/strong> It withstands water jets from any direction, ensuring internal dryness during cleaning or heavy rain.<\/li>\n<li><strong>Corrosion resistance:<\/strong> Fabricated from 304 or 316 stainless steel, it resists salt spray and acidic gases without requiring surface coatings.<\/li>\n<li><strong>Condensation control:<\/strong> A built\u2011in thermostatically controlled heater prevents internal moisture condensation during temperature swings.<\/li>\n<\/ul>\n<table>\n<caption style=\"caption-side: bottom; text-align: left; font-style: italic; margin-top: 0.5rem;\">Table \u2461: Recommended Transformer Protection Schemes by Scenario<\/caption>\n<thead>\n<tr>\n<th>Application Scenario<\/th>\n<th>Primary Threat<\/th>\n<th>Recommended Protection<\/th>\n<th>Enclosure Features<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Underground coal mine<\/td>\n<td>Methane, high humidity<\/td>\n<td>MSHA\/IECEx flameproof<\/td>\n<td>Flameproof, anti\u2011condensation heater<\/td>\n<\/tr>\n<tr>\n<td>Coastal steel mill<\/td>\n<td>Salt spray, metallic dust<\/td>\n<td>IP55 + NEMA 4X<\/td>\n<td>304\/316 SS sealed enclosure<\/td>\n<\/tr>\n<tr>\n<td>Open\u2011pit copper mine<\/td>\n<td>Conductive dust, heavy rain<\/td>\n<td>IP55<\/td>\n<td>Stainless steel, air filters<\/td>\n<\/tr>\n<tr>\n<td>High\u2011altitude (&gt;4000m)<\/td>\n<td>Low pressure, cooling difficulty<\/td>\n<td>Derating per IEC 60076<\/td>\n<td>Increased creepage, high\u2011altitude fans<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<div class=\"note\"><em>Note \u2461: NEMA 4X denotes protection against splashing water and dust, with corrosion resistance suited for acidic or coastal environments.<\/em><\/div>\n<p>At high\u2011altitude sites above 4 500 meters, IEC 60076 derating and increased clearances are mandatory. This is where OEM customization proves its value. We supply non\u2011standard voltage taps, specified cable entry positions, skid\u2011mounted bases, and remote temperature monitoring modules that interface with the plant DCS, seamlessly integrating into the existing distribution scheme.<\/p>\n<h2>Quality Assurance Closed Loop \u2014 IEEE\/IEC Type and Special Tests with Third\u2011Party Data<\/h2>\n<p>Routine tests (ratio, DC resistance, power\u2011frequency withstand) are the baseline; only type and special tests confirm true \u201cindustrial\u2011grade\u201d reliability. We adhere to <strong>IEEE C57.12.01<\/strong> dan <strong>IEC 60076<\/strong> series standards, testing representative units beyond conventional requirements.<\/p>\n<table>\n<caption style=\"caption-side: bottom; text-align: left; font-style: italic; margin-top: 0.5rem;\">Table \u2462: Comparison of Routine, Type, and Special Tests<\/caption>\n<thead>\n<tr>\n<th>Test Category<\/th>\n<th>Examples<\/th>\n<th>Purpose<\/th>\n<th>Standard Basis<\/th>\n<th>Third\u2011Party Witness<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Routine<\/td>\n<td>Ratio, DC resistance, power\u2011frequency withstand<\/td>\n<td>Per\u2011unit consistency<\/td>\n<td>IEC 60076\u201111<\/td>\n<td>No (in\u2011house)<\/td>\n<\/tr>\n<tr>\n<td>Type<\/td>\n<td>Temperature rise, lightning impulse<\/td>\n<td>Design and insulation validation<\/td>\n<td>IEEE C57.12.01<\/td>\n<td>Recommended<\/td>\n<\/tr>\n<tr>\n<td>Special<\/td>\n<td>2\u2011s short\u2011circuit withstand, partial discharge, sound level<\/td>\n<td>Extreme\u2011condition reliability<\/td>\n<td>IEC 60076\u20115, IEEE C57.12.90<\/td>\n<td>Mandatory<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>The temperature rise test verifies hotspot safety margin; lightning impulse tests check insulation robustness. Most decisive is the <strong>2\u2011second short\u2011circuit mechanical withstand test<\/strong>, the \u201cgold standard\u201d for three compelling reasons:<\/p>\n<ul>\n<li><strong>Extreme electrodynamic stress:<\/strong> With the secondary short\u2011circuited and rated voltage applied, windings experience peak forces hundreds of times greater than normal operation within milliseconds, directly testing the structural design\u2019s ultimate margin.<\/li>\n<li><strong>Comprehensive structural examination:<\/strong> The test simultaneously stresses core clamps, insulation blocks, lead supports, and fastening bolts\u2014not just the windings\u2014exposing any weak point.<\/li>\n<li><strong>Rigorous acceptance criteria:<\/strong> Post\u2011test, turns ratio, impedance, and insulation resistance must remain unchanged, and a core\u2011and\u2011coil inspection must confirm zero permanent deformation.<\/li>\n<\/ul>\n<p>A witnessed report from <strong>KEMA Laboratories<\/strong> or <strong>UL Solutions<\/strong>\u2014and for routine production audits, our in\u2011house testing procedures adhere to IEC 60076 requirements and follow ISO\/IEC 17025 principles\u2014is the key document in technical evaluations. As a manufacturer with ISO 9001 certification and State Grid qualification, we apply consistent quality control at every step\u2014from silicon\u2011steel incoming inspection and epoxy ratio monitoring to digital insulation resistance recording. Ongoing R&amp;D efforts have produced multiple patents in winding heat dissipation and noise reduction, enabling a wide range of custom solutions. Advanced foil winding, vacuum casting, and automated testing lines support manufacturing precision and repeatability.<\/p>\n<div class=\"case-study\">\n<p><strong>Case Study: Zambian Copper Mine Project<\/strong><\/p>\n<p>In a recent expansion at the <strong>Luanshya copper mine in Zambia<\/strong>, the site needed a transformer to withstand repeated 5\u00d7 starting surges for a SAG mill, at altitude with sulfurous dust.<\/p>\n<p>We supplied a 6.3 MVA, 33\/0.69 kV epoxy\u2011cast <a href=\"https:\/\/lbajiele.com\/id\/products\/\">dry\u2011type<\/a> unit with 8 % impedance, vacuum\u2011cast windings, and IP55 NEMA 4X enclosure. Our field engineers worked alongside the mine\u2019s maintenance team during commissioning to verify harmonic damping and set the OLTC range, ensuring the sub\u20112 % voltage fluctuation target was met from day one. The unit passed short\u2011circuit and temperature rise type tests at an accredited South African laboratory and has since maintained secondary voltage within \u00b12 % (contract required \u00b15 %) over 18 months of continuous operation. This confirms the value of full\u2011chain quality control from engineering to test verification.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-1978 aligncenter\" src=\"https:\/\/lbajiele.com\/wp-content\/uploads\/2026\/07\/step-down-powertransformer.2.webp\" alt=\"\" width=\"2560\" height=\"1712\" srcset=\"https:\/\/lbajiele.com\/wp-content\/uploads\/2026\/07\/step-down-powertransformer.2.webp 2560w, https:\/\/lbajiele.com\/wp-content\/uploads\/2026\/07\/step-down-powertransformer.2-300x201.webp 300w, https:\/\/lbajiele.com\/wp-content\/uploads\/2026\/07\/step-down-powertransformer.2-1024x685.webp 1024w, https:\/\/lbajiele.com\/wp-content\/uploads\/2026\/07\/step-down-powertransformer.2-768x514.webp 768w, https:\/\/lbajiele.com\/wp-content\/uploads\/2026\/07\/step-down-powertransformer.2-1536x1027.webp 1536w, https:\/\/lbajiele.com\/wp-content\/uploads\/2026\/07\/step-down-powertransformer.2-2048x1370.webp 2048w\" sizes=\"auto, (max-width: 2560px) 100vw, 2560px\" \/><\/p>\n<\/div>\n<h2>Remote Mine Delivery and Lifecycle Support \u2014 From Shock\u2011Resistant Packaging to RCM Training<\/h2>\n<p>Transformer value is realized in the field. For remote sites in Mongolia, the Pilbara, or West Africa, logistics is an engineered task. We use <strong>ISO 2244<\/strong>\u2011compliant packaging, split\u2011core structures for shaft lowering, and nitrogen\u2011sealed ocean shipping with desiccant breathers to prevent condensation.<\/p>\n<p>On site, detailed installation manuals and remote video support aid local teams. We also provide Reliability\u2011Centered Maintenance (RCM) training, helping users transition to condition\u2011based practices. This full\u2011lifecycle engagement is what groups like <strong>Freeport\u2011McMoRan<\/strong> dan <strong>ArcelorMittal<\/strong> evaluate, distinguishing a long\u2011term technology partner from a one\u2011time vendor.<\/p>\n<div class=\"cta\">\n<p><strong>Call to Action<\/strong><\/p>\n<p>When selecting heavy\u2011duty step\u2011down transformers, look beyond the purchase price. Request a <strong>Total Cost of Ownership (TCO) calculation<\/strong> based on local tariffs and <strong>third\u2011party type test reports<\/strong> for short\u2011circuit withstand. We are committed to sustainable manufacturing and are glad to share operational loss data. To receive our <em>Industrial Transformer Efficiency Selection and TCO White Paper<\/em> or arrange a no\u2011obligation technical discussion, please contact our engineering team.<\/p>\n<\/div>\n<h2>Frequently Asked Questions (FAQ)<\/h2>\n<div class=\"faq-item\"><strong>Q1: What distinguishes an EAF <a href=\"https:\/\/lbajiele.com\/id\/products\/\">step\u2011down power transformer<\/a> from a distribution transformer?<\/strong>A: EAF transformers are built for frequent short circuits and high harmonics, featuring 8\u201312 % impedance, OLTC, and reinforced windings. Standard distribution units cannot sustain such conditions.<\/p>\n<\/div>\n<div class=\"faq-item\"><strong>Q2: Why are epoxy\u2011cast dry\u2011type transformers preferred underground?<\/strong>A: They eliminate fire and leak risks, and their monolithic structure offers superior vibration and moisture resistance for confined, humid spaces.<\/p>\n<\/div>\n<div class=\"faq-item\"><strong>Q3: How can test data prove a transformer will withstand repeated crusher starts?<\/strong>A: Require a third\u2011party witnessed 2\u2011second short\u2011circuit test report and overload capability curves. Vacuum\u2011cast copper foil windings are the design foundation for shock resistance.<\/p>\n<\/div>\n<div class=\"faq-item\"><strong>Q4: What enclosure rating is needed in a conductive dust steel mill environment?<\/strong>A: Minimum IP55 with air filters; fully enclosed air\u2011to\u2011air heat exchangers for severe dust; NEMA 4X for coastal corrosion.<\/p>\n<\/div>\n<div class=\"faq-item\"><strong>Q5: Can we get an OEM transformer compatible with an old steel mill\u2019s power system?<\/strong>A: Yes. OEM solutions match existing busbar interfaces, voltage taps, and base dimensions, with transient simulations ensuring parallel current sharing.<\/p>\n<\/div>\n<div class=\"faq-item\"><strong>Q6: What special design is needed for a transformer above 4 000 meters altitude?<\/strong>A: Derating per IEC 60076, upgraded insulation, increased clearances, and high\u2011altitude cooling fans, supported by actual project data.<\/p>\n<\/div>\n<div class=\"faq-item\"><strong>Q7: How is the TCO of an industrial transformer calculated?<\/strong>A: Purchase price plus capitalized present value of no\u2011load and load losses. A 0.3 % efficiency gain can offset the price premium over 10 years; verify measured loss values.<\/p>\n<\/div>\n<div class=\"faq-item\"><strong>Q8: What documentation proves short\u2011circuit withstand capability?<\/strong>A: A type test certificate witnessed by an accredited laboratory such as KEMA or UL, along with the complete data report.<\/p>\n<\/div>\n<div class=\"references\">\n<h2>References<\/h2>\n<ol>\n<li>IEA (2023), <em>World Energy Investment 2023<\/em>, IEA, Paris. <a href=\"https:\/\/www.iea.org\/reports\/world-energy-investment-2023\" target=\"_blank\" rel=\"noopener nofollow\">https:\/\/www.iea.org\/reports\/world-energy-investment-2023<\/a><\/li>\n<li>IEEE Std C57.12.01-2020, <em>IEEE Standard for General Requirements for Dry-Type Distribution and Power Transformers<\/em>. <a href=\"https:\/\/ieeexplore.ieee.org\/document\/9293244\" target=\"_blank\" rel=\"noopener nofollow\">https:\/\/ieeexplore.ieee.org\/document\/9293244<\/a><\/li>\n<li>IEC 60076-11:2018, <em>Power transformers \u2013 Part 11: Dry-type transformers<\/em>. <a href=\"https:\/\/webstore.iec.ch\/publication\/28143\" target=\"_blank\" rel=\"noopener nofollow\">https:\/\/webstore.iec.ch\/publication\/28143<\/a><\/li>\n<li>IEC 61000-4-15:2010, <em>EMC \u2013 Part 4-15: Flickermeter<\/em>. <a href=\"https:\/\/webstore.iec.ch\/publication\/4235\" target=\"_blank\" rel=\"noopener nofollow\">https:\/\/webstore.iec.ch\/publication\/4235<\/a><\/li>\n<li>NEMA 250-2020, <em>Enclosures for Electrical Equipment<\/em>. <a href=\"https:\/\/www.nema.org\/standards\/view\/enclosures-for-electrical-equipment\" target=\"_blank\" rel=\"noopener nofollow\">https:\/\/www.nema.org\/standards\/view\/enclosures-for-electrical-equipment<\/a><\/li>\n<li>ISO 2244:2000, <em>Packaging \u2013 Horizontal impact test methods<\/em>. <a href=\"https:\/\/www.iso.org\/standard\/31362.html\" target=\"_blank\" rel=\"noopener nofollow\">https:\/\/www.iso.org\/standard\/31362.html<\/a><\/li>\n<li>EPRI (2009), <em>Dry-Type Transformer Reliability in Industrial Environments<\/em>, Report No. 1016472. <a href=\"https:\/\/www.epri.com\/research\/products\/1016472\" target=\"_blank\" rel=\"noopener nofollow\">https:\/\/www.epri.com\/research\/products\/1016472<\/a><\/li>\n<\/ol>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>With the continuing growth of deep global mining and steel production using electric arc furnaces (EAF), step-down power transformers will be essential for dependable power transmission. According to the IEA, total investment in power grids globally exceeded USD310 billion in 2023, with upgrade of distribution transformers being the highest priority. Mining and primary metals (both [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":1977,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[31],"tags":[],"class_list":["post-1975","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/lbajiele.com\/id\/wp-json\/wp\/v2\/posts\/1975","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lbajiele.com\/id\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lbajiele.com\/id\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lbajiele.com\/id\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lbajiele.com\/id\/wp-json\/wp\/v2\/comments?post=1975"}],"version-history":[{"count":1,"href":"https:\/\/lbajiele.com\/id\/wp-json\/wp\/v2\/posts\/1975\/revisions"}],"predecessor-version":[{"id":1979,"href":"https:\/\/lbajiele.com\/id\/wp-json\/wp\/v2\/posts\/1975\/revisions\/1979"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/lbajiele.com\/id\/wp-json\/wp\/v2\/media\/1977"}],"wp:attachment":[{"href":"https:\/\/lbajiele.com\/id\/wp-json\/wp\/v2\/media?parent=1975"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lbajiele.com\/id\/wp-json\/wp\/v2\/categories?post=1975"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lbajiele.com\/id\/wp-json\/wp\/v2\/tags?post=1975"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}