{"id":38905,"date":"2026-10-26T06:31:35","date_gmt":"2026-10-26T06:31:35","guid":{"rendered":"https:\/\/dinghongtransformer.com\/?p=38905"},"modified":"2026-10-26T06:32:02","modified_gmt":"2026-10-26T06:32:02","slug":"power-factor-correction-panel-sizing","status":"publish","type":"post","link":"https:\/\/dinghongtransformer.com\/th\/blog\/product-insights\/power-factor-correction-panel-sizing\/","title":{"rendered":"Power Factor Correction Panel Sizing: kVAR Calculation, Detuned Reactors &amp; RFQ Checklist"},"content":{"rendered":"\n<p class=\"wp-block-wd-paragraph wd-2036acd5\">A power factor correction panel can help industrial facilities reduce unnecessary reactive power demand, improve power factor, and make better use of existing electrical distribution capacity.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-b3c56ccb\">However, choosing a capacitor bank based only on transformer kVA or a supplier&#8217;s standard cabinet size can lead to overcompensation, harmonic resonance, overheating, and unnecessary equipment costs.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-a0d92eff\">For factories, industrial parks, commercial buildings, and infrastructure projects in Vietnam, Thailand, Ethiopia, Nigeria, Uzbekistan, Ukraine, Myanmar, and Russia, power factor correction panel sizing should begin with actual load measurements and the electrical system&#8217;s operating conditions.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-54b7f1e3\">This guide explains how to calculate the required compensation capacity in kVAR, compare automatic and fixed capacitor banks, evaluate harmonic risks, and prepare an accurate RFQ for a low-voltage power factor correction panel.<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_89 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\">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:\/\/dinghongtransformer.com\/th\/blog\/product-insights\/power-factor-correction-panel-sizing\/#1_What_Is_a_Power_Factor_Correction_Panel\" >1. What Is a Power Factor Correction Panel?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/dinghongtransformer.com\/th\/blog\/product-insights\/power-factor-correction-panel-sizing\/#2_How_to_Calculate_Power_Factor_Correction_Panel_Capacity\" >2. How to Calculate Power Factor Correction Panel Capacity<\/a><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:\/\/dinghongtransformer.com\/th\/blog\/product-insights\/power-factor-correction-panel-sizing\/#Example_Correcting_a_Factory_from_075_to_095_Power_Factor\" >Example: Correcting a Factory from 0.75 to 0.95 Power Factor<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/dinghongtransformer.com\/th\/blog\/product-insights\/power-factor-correction-panel-sizing\/#3_Power_Factor_Correction_Sizing_Examples\" >3. Power Factor Correction Sizing Examples<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/dinghongtransformer.com\/th\/blog\/product-insights\/power-factor-correction-panel-sizing\/#4_Automatic_vs_Fixed_Power_Factor_Correction_Panels\" >4. Automatic vs Fixed Power Factor Correction Panels<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/dinghongtransformer.com\/th\/blog\/product-insights\/power-factor-correction-panel-sizing\/#Why_Capacitor_Step_Size_Matters\" >Why Capacitor Step Size Matters<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/dinghongtransformer.com\/th\/blog\/product-insights\/power-factor-correction-panel-sizing\/#5_When_Do_You_Need_Detuned_Reactors\" >5. When Do You Need Detuned Reactors?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/dinghongtransformer.com\/th\/blog\/product-insights\/power-factor-correction-panel-sizing\/#Standard_vs_Detuned_Compensation\" >Standard vs Detuned Compensation<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/dinghongtransformer.com\/th\/blog\/product-insights\/power-factor-correction-panel-sizing\/#6_Practical_Application_Scenario_Industrial_Factory_in_Thailand\" >6. Practical Application Scenario: Industrial Factory in Thailand<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/dinghongtransformer.com\/th\/blog\/product-insights\/power-factor-correction-panel-sizing\/#DHDL_Product_Reference\" >DHDL Product Reference<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/dinghongtransformer.com\/th\/blog\/product-insights\/power-factor-correction-panel-sizing\/#7_Hidden_Costs_Buyers_Should_Check_Before_Ordering\" >7. Hidden Costs Buyers Should Check Before Ordering<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/dinghongtransformer.com\/th\/blog\/product-insights\/power-factor-correction-panel-sizing\/#8_Power_Factor_Correction_Panel_RFQ_Checklist\" >8. Power Factor Correction Panel RFQ Checklist<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/dinghongtransformer.com\/th\/blog\/product-insights\/power-factor-correction-panel-sizing\/#Recommended_RFQ_Attachments\" >Recommended RFQ Attachments<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/dinghongtransformer.com\/th\/blog\/product-insights\/power-factor-correction-panel-sizing\/#9_Power_Factor_Correction_Solutions_from_DHDL\" >9. Power Factor Correction Solutions from DHDL<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-wd-title title wd-0f02df07\"><span class=\"ez-toc-section\" id=\"1_What_Is_a_Power_Factor_Correction_Panel\"><\/span>1. What Is a Power Factor Correction Panel?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-52c3bb9f\">A power factor correction panel, also called an APFC panel or automatic capacitor bank, supplies capacitive reactive power to compensate for inductive loads.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-71dce800\">Industrial equipment such as induction motors, pumps, compressors, and certain transformers consumes reactive power in addition to real power.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-f59f0ac2\">When the power factor is low, the electrical system may carry more current than necessary to deliver the same real power.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-87cb5ae0\">A properly designed compensation panel can help:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Improve the operating power factor<\/li>\n\n\n\n<li>Reduce reactive power drawn from the upstream network<\/li>\n\n\n\n<li>Reduce current in upstream cables and transformers<\/li>\n\n\n\n<li>Reduce some electrical distribution losses<\/li>\n\n\n\n<li>Improve utilization of existing distribution equipment<\/li>\n\n\n\n<li>Reduce reactive energy charges where the utility tariff provides an incentive<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-767ae523\">DHDL&#8217;s GGJ <a href=\"https:\/\/dinghongtransformer.com\/product-category\/distribution-cabinets\/low-voltage-cabinet\/\" data-type=\"product_cat\" data-id=\"81\"><strong><em>low-voltage<\/em><\/strong><\/a> reactive power compensation cabinet is a relevant product category for industrial and commercial <a href=\"https:\/\/dinghongtransformer.com\/product\/ggd-low-voltage-distribution-cabinet-for-power-distribution\/\" data-type=\"product\" data-id=\"37463\"><strong><em>low-voltage distribution<\/em><\/strong><\/a> applications.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-4fc0756d\">The exact cabinet configuration depends on the required compensation capacity, system voltage, switching method, protection arrangement, and power-quality conditions.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-d7e6e0fb\"><span class=\"ez-toc-section\" id=\"2_How_to_Calculate_Power_Factor_Correction_Panel_Capacity\"><\/span>2. How to Calculate Power Factor Correction Panel Capacity<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-356ddc1a\">The required capacitor bank capacity is generally expressed in kVAR (kilovolt-amperes reactive).<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-b75b1bb4\">For a simplified steady-state calculation with sinusoidal voltage and current:<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-dc7e5c9b\">\\[ \\boxed{Q_c=P(\\tan\\phi_1-\\tan\\phi_2)} \\]<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-c1d614dd\">Where:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Qc = Required compensation capacity in kVAR<\/li>\n\n\n\n<li>P = Real power demand in kW<\/li>\n\n\n\n<li>\u03c61 = Angle corresponding to the existing power factor<\/li>\n\n\n\n<li>\u03c62 = Angle corresponding to the target power factor<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-be660dac\">The angle is calculated using:<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-cc59c018\">\\[ \\phi=\\cos^{-1}(PF) \\]<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-c5a41c15\"><span class=\"ez-toc-section\" id=\"Example_Correcting_a_Factory_from_075_to_095_Power_Factor\"><\/span>Example: Correcting a Factory from 0.75 to 0.95 Power Factor<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-6bffa720\">Assume an industrial facility has:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th>Parameter<\/th><th>Example Value<\/th><\/tr><tr><td>Real Power Demand<\/td><td>800kW<\/td><\/tr><tr><td>Existing Power Factor<\/td><td>0.75<\/td><\/tr><tr><td>Target Power Factor<\/td><td>0.95<\/td><\/tr><tr><td>Existing Apparent Power<\/td><td>1,067kVA<\/td><\/tr><tr><td>Target Apparent Power<\/td><td>842kVA<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-70ae74c1\">The required compensation is:<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-cbc468b4\">\\[ Q_c=800(\\tan(\\cos^{-1}0.75)-\\tan(\\cos^{-1}0.95)) \\]<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-91b070ac\">\\[ Q_c\\approx800(0.882-0.329) \\]<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-b3bf8074\">\\[ \\boxed{Q_c\\approx443\\text{ kVAR}} \\]<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-1e39efeb\">A nominal 450kVAR automatic capacitor bank could be an initial candidate for this example.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-be738ce2\">However, the final selection must consider load variation, capacitor voltage rating, harmonic distortion, available standard steps, and the actual system operating voltage.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-33aa1820\">Hidden procurement risk: A calculated 443kVAR requirement does not automatically mean that a 450kVAR capacitor bank will deliver exactly 450kVAR at every installation voltage.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-9e8faa8f\">Capacitor reactive output varies approximately with the square of the applied voltage, and detuned reactor arrangements can change the relationship between component ratings and net compensation.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-1242a153\"><span class=\"ez-toc-section\" id=\"3_Power_Factor_Correction_Sizing_Examples\"><\/span>3. Power Factor Correction Sizing Examples<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-89430f6f\">The following table illustrates typical compensation calculations.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th>Real Power<\/th><th>Existing PF<\/th><th>Target PF<\/th><th>Calculated Compensation<\/th><\/tr><tr><td>200kW<\/td><td>0.75<\/td><td>0.95<\/td><td>111kVAR<\/td><\/tr><tr><td>400kW<\/td><td>0.80<\/td><td>0.95<\/td><td>169kVAR<\/td><\/tr><tr><td>600kW<\/td><td>0.85<\/td><td>0.95<\/td><td>175kVAR<\/td><\/tr><tr><td>800kW<\/td><td>0.75<\/td><td>0.95<\/td><td>443kVAR<\/td><\/tr><tr><td>1,000kW<\/td><td>0.80<\/td><td>0.95<\/td><td>421kVAR<\/td><\/tr><tr><td>1,500kW<\/td><td>0.85<\/td><td>0.98<\/td><td>625kVAR<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-586b97ec\">These values are calculated examples, not fixed cabinet recommendations.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-fa65a593\">The required installed capacity should be selected using the facility&#8217;s measured demand profile and power-quality assessment.<\/p>\n\n\n\n<div class=\"wp-block-wd-image wd-block-image wd-87380e57\"><img decoding=\"async\" width=\"1672\" height=\"941\" class=\"wp-image-38907 lazyload\" data-src=\"https:\/\/dinghongtransformer.com\/wp-content\/uploads\/2026\/10\/Power-Factor-Correction-Panel-Sizing-RFQ-Guide.png\" alt=\"\" data-srcset=\"https:\/\/dinghongtransformer.com\/wp-content\/uploads\/2026\/10\/Power-Factor-Correction-Panel-Sizing-RFQ-Guide.png 1672w, https:\/\/dinghongtransformer.com\/wp-content\/uploads\/2026\/10\/Power-Factor-Correction-Panel-Sizing-RFQ-Guide-400x225.png 400w, https:\/\/dinghongtransformer.com\/wp-content\/uploads\/2026\/10\/Power-Factor-Correction-Panel-Sizing-RFQ-Guide-1300x732.png 1300w, https:\/\/dinghongtransformer.com\/wp-content\/uploads\/2026\/10\/Power-Factor-Correction-Panel-Sizing-RFQ-Guide-768x432.png 768w, https:\/\/dinghongtransformer.com\/wp-content\/uploads\/2026\/10\/Power-Factor-Correction-Panel-Sizing-RFQ-Guide-1536x864.png 1536w, https:\/\/dinghongtransformer.com\/wp-content\/uploads\/2026\/10\/Power-Factor-Correction-Panel-Sizing-RFQ-Guide-18x10.png 18w, https:\/\/dinghongtransformer.com\/wp-content\/uploads\/2026\/10\/Power-Factor-Correction-Panel-Sizing-RFQ-Guide-430x242.png 430w, https:\/\/dinghongtransformer.com\/wp-content\/uploads\/2026\/10\/Power-Factor-Correction-Panel-Sizing-RFQ-Guide-700x394.png 700w, https:\/\/dinghongtransformer.com\/wp-content\/uploads\/2026\/10\/Power-Factor-Correction-Panel-Sizing-RFQ-Guide-150x84.png 150w\" data-sizes=\"(max-width: 1672px) 100vw, 1672px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1672px; --smush-placeholder-aspect-ratio: 1672\/941;\" \/><\/div>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-f1255486\">For industrial projects in Vietnam, Thailand, Nigeria, and Ethiopia, a seven-day or longer load and power-factor recording period may be useful where demand varies significantly between shifts.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-89e77055\"><span class=\"ez-toc-section\" id=\"4_Automatic_vs_Fixed_Power_Factor_Correction_Panels\"><\/span>4. Automatic vs Fixed Power Factor Correction Panels<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-94e07b50\">Not every facility needs the same switching arrangement.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th>Parameter<\/th><th>Fixed Capacitor Bank<\/th><th>Automatic PFC Panel<\/th><\/tr><tr><td>Compensation<\/td><td>Fixed output<\/td><td>Multiple switched steps<\/td><\/tr><tr><td>Best-Suited Load<\/td><td>Relatively stable<\/td><td>Variable industrial loads<\/td><\/tr><tr><td>Controller<\/td><td>May not be required<\/td><td>Automatic PF controller<\/td><\/tr><tr><td>Switching<\/td><td>Fixed or manually controlled<\/td><td>Contactors or suitable electronic switches<\/td><\/tr><tr><td>Main Risk<\/td><td>Overcompensation at light load<\/td><td>Poor step design or excessive switching<\/td><\/tr><tr><td>Procurement Focus<\/td><td>Correct fixed kVAR<\/td><td>Step size, response time and control logic<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-05dfefec\">For factories in Vietnam, Thailand, and Uzbekistan operating several production shifts, automatic power factor correction may be appropriate when reactive power demand changes throughout the day.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-c4b6192b\">A facility with relatively constant inductive demand may use a fixed capacitor bank, provided the operating conditions justify it.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-11567865\"><span class=\"ez-toc-section\" id=\"Why_Capacitor_Step_Size_Matters\"><\/span>Why Capacitor Step Size Matters<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-8b0ae1f9\">Suppose a factory requires approximately 450kVAR of compensation at peak demand.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-07f48b43\">One possible automatic configuration is:<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-36f46086\">25 + 25 + 50 + 50 + 100 + 100 + 100 = 450kVAR<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-3c591965\">This is only an illustrative step arrangement.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-9553955e\">Smaller steps allow finer adjustment at low loads, while larger steps provide greater compensation during high demand.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-b9f042d4\">For rapidly changing loads, the supplier should also evaluate switching speed and equipment duty.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-df4bdc82\"><span class=\"ez-toc-section\" id=\"5_When_Do_You_Need_Detuned_Reactors\"><\/span>5. When Do You Need Detuned Reactors?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-8af57506\">Harmonics are one of the most important hidden risks in power factor correction projects.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-b2e766ce\">Factories using variable-frequency drives, rectifiers, UPS systems, welding equipment, and other nonlinear loads may experience significant harmonic distortion.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-cad00b8f\">Connecting a conventional capacitor bank to such a network can create resonance conditions and increase current through the capacitors.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-fade6242\">Depending on the power-quality study, the solution may require a detuned capacitor bank using series reactors.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-112f0de0\">Before selecting the panel, request:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Voltage and current harmonic measurements<\/li>\n\n\n\n<li>Total harmonic voltage distortion (THDv)<\/li>\n\n\n\n<li>Total harmonic current distortion (THDi)<\/li>\n\n\n\n<li>Individual harmonic components<\/li>\n\n\n\n<li>Transformer capacity and impedance<\/li>\n\n\n\n<li>Existing capacitor banks<\/li>\n\n\n\n<li>Variable-frequency drive and rectifier loads<\/li>\n\n\n\n<li>Utility power-quality requirements<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-1da2baa8\"><span class=\"ez-toc-section\" id=\"Standard_vs_Detuned_Compensation\"><\/span>Standard vs Detuned Compensation<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th>Item<\/th><th>Standard Capacitor Bank<\/th><th>Detuned Capacitor Bank<\/th><\/tr><tr><td>Main Components<\/td><td>Capacitors and switching devices<\/td><td>Capacitors with series reactors<\/td><\/tr><tr><td>Harmonic Environment<\/td><td>Suitable after system assessment<\/td><td>Used where resonance risk requires mitigation<\/td><\/tr><tr><td>Design Complexity<\/td><td>Lower<\/td><td>Higher<\/td><\/tr><tr><td>Cabinet Space<\/td><td>Generally smaller<\/td><td>Additional reactor space<\/td><\/tr><tr><td>Heat Dissipation<\/td><td>Capacitor and switching losses<\/td><td>Additional reactor losses and heat<\/td><\/tr><tr><td>Main Buyer Check<\/td><td>kVAR and switching<\/td><td>Harmonic study, tuning and thermal design<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-f5b7e9c2\">A detuned reactor arrangement is not automatically a complete harmonic filter.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-9cd8f94b\">Hidden buyer tip: Do not specify a 7% reactor solely because it appears in another supplier&#8217;s quotation. Reactor tuning, capacitor voltage rating, harmonic conditions and component thermal limits must be engineered together.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-ee288e94\"><span class=\"ez-toc-section\" id=\"6_Practical_Application_Scenario_Industrial_Factory_in_Thailand\"><\/span>6. Practical Application Scenario: <a href=\"https:\/\/dinghongtransformer.com\/blog\/thailand-industrial-park-power-distribution-expansion-project\/\" data-type=\"post\" data-id=\"37374\"><strong><em>Industrial Factory in Thailand<\/em><\/strong><\/a><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-a5312237\">Consider an illustrative manufacturing facility in Thailand operating motors, compressors and variable-frequency drives.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-8a085058\">The facility has an 800kW measured maximum demand and an existing power factor of 0.75.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-cb908f1e\">The project aims to improve the power factor to approximately 0.95.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-9f248428\">The preliminary compensation requirement is 443kVAR.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-1c75892c\">A possible procurement process would be:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Measure the load and power factor over representative operating shifts.<\/li>\n\n\n\n<li>Confirm the required compensation capacity.<\/li>\n\n\n\n<li>Review harmonic distortion and resonance risk.<\/li>\n\n\n\n<li>Decide whether a standard or detuned APFC panel is appropriate.<\/li>\n\n\n\n<li>Select capacitor step sizes and switching equipment.<\/li>\n\n\n\n<li>Confirm cabinet ventilation, protection and installation space.<\/li>\n\n\n\n<li>Approve drawings and testing requirements before manufacturing.<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-39d9e25c\">For a project in Vietnam, the same process may require additional attention to humidity, ventilation and coastal corrosion where applicable.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-39fc5f72\">For Ethiopia, site altitude and ambient temperature should be provided for component thermal review.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-4b60cc1f\">For Nigeria, the buyer should confirm actual voltage variation, load profile and site power-quality conditions.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-b99d5011\">For Uzbekistan, seasonal temperature variation, dust and the electrical-room environment may influence the cabinet design.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-76338dd3\">These are engineering application examples, not claims that DHDL has supplied a specific 450kVAR panel to these facilities.<\/p>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-cb2a8fce\"><span class=\"ez-toc-section\" id=\"DHDL_Product_Reference\"><\/span>DHDL Product Reference<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-bd7781f5\">DHDL&#8217;s published <a href=\"https:\/\/dinghongtransformer.com\/blog\/low-voltage-distribution-cabinet\/\" data-type=\"post\" data-id=\"38713\"><strong><em>GGJ Low-Voltage Reactive Power<\/em><\/strong><\/a> Compensation Cabinet integrates compensation capacitors, intelligent controllers, switching devices, protection components, busbars and monitoring functions.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-0611efec\">The manufacturer identifies industrial facilities, commercial buildings, substations and transformer low-voltage distribution systems as intended applications. Compensation capacity, voltage level, capacitor configuration, controller type and protection design are project-specific.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-4fd71332\">A fixed kVAR range, standard cabinet dimensions or guaranteed project power-factor improvement should not be assumed without an approved technical proposal.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-232e8036\"><span class=\"ez-toc-section\" id=\"7_Hidden_Costs_Buyers_Should_Check_Before_Ordering\"><\/span>7. Hidden Costs Buyers Should Check Before Ordering<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-140d973b\">Two quotations for a 450kVAR power factor correction panel may differ significantly in price because their technical scope is different.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-df4931d7\">Common hidden costs include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Detuned reactors and higher-rated capacitors<\/li>\n\n\n\n<li>Additional ventilation or forced cooling<\/li>\n\n\n\n<li>Capacitor-duty contactors or thyristor switching<\/li>\n\n\n\n<li>Short-circuit protection and busbar upgrades<\/li>\n\n\n\n<li>Current transformers (CTs) and controller wiring<\/li>\n\n\n\n<li>Harmonic measurements and commissioning<\/li>\n\n\n\n<li>Replacement capacitors and maintenance access<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-814a3fa2\">Another common mistake is installing the compensation panel at the wrong measurement or connection point.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-b2a1582d\">For example, a current transformer installed incorrectly may cause the automatic controller to switch capacitor steps improperly.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-422aafd0\">Procurement tip: Request a Single-Line Diagram showing the capacitor bank connection, CT location, incoming protection and controller wiring before approving production.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-89118c31\"><span class=\"ez-toc-section\" id=\"8_Power_Factor_Correction_Panel_RFQ_Checklist\"><\/span>8. Power Factor Correction Panel <a href=\"https:\/\/dinghongtransformer.com\/blog\/product-insights\/transformer-rfq-checklist\/\" data-type=\"post\" data-id=\"38222\"><em>RFQ Checklist<\/em><\/a><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-3895a2bf\">Use the following checklist when requesting a quotation from a manufacturer.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th>RFQ Parameter<\/th><th>Buyer Input<\/th><\/tr><tr><td>Destination Country<\/td><td>__________<\/td><\/tr><tr><td>Application<\/td><td>Factory \/ Commercial \/ Substation<\/td><\/tr><tr><td>System Voltage<\/td><td>_____ V<\/td><\/tr><tr><td>Frequency<\/td><td>50 \/ 60Hz<\/td><\/tr><tr><td>Phase<\/td><td>Three-Phase<\/td><\/tr><tr><td>Transformer Capacity<\/td><td>_____ kVA<\/td><\/tr><tr><td>Transformer Impedance<\/td><td>_____ %<\/td><\/tr><tr><td>Maximum Real Power<\/td><td>_____ kW<\/td><\/tr><tr><td>Existing Power Factor<\/td><td>_____<\/td><\/tr><tr><td>Target Power Factor<\/td><td>_____<\/td><\/tr><tr><td>Required Compensation<\/td><td>_____ kVAR<\/td><\/tr><tr><td>Load Variation<\/td><td>Stable \/ Variable \/ Rapid<\/td><\/tr><tr><td>Compensation Type<\/td><td>Fixed \/ Automatic<\/td><\/tr><tr><td>Capacitor Steps<\/td><td>_____ Steps<\/td><\/tr><tr><td>Switching Method<\/td><td>Contactor \/ Thyristor<\/td><\/tr><tr><td>Harmonic Measurements<\/td><td>THDv \/ THDi \/ Spectrum<\/td><\/tr><tr><td>Detuned Reactors<\/td><td>Required \/ To Be Evaluated<\/td><\/tr><tr><td>Controller Functions<\/td><td>__________<\/td><\/tr><tr><td>Short-Circuit Rating<\/td><td>_____ kA<\/td><\/tr><tr><td>Incoming Protection<\/td><td>__________<\/td><\/tr><tr><td>Cabinet IP Rating<\/td><td>__________<\/td><\/tr><tr><td>Installation<\/td><td>Indoor \/ Outdoor<\/td><\/tr><tr><td>Maximum Temperature<\/td><td>_____ \u00b0C<\/td><\/tr><tr><td>Altitude<\/td><td>_____ m<\/td><\/tr><tr><td>Communication<\/td><td>Modbus \/ Other<\/td><\/tr><tr><td>Applicable Standards<\/td><td>IEC \/ Local \/ Project<\/td><\/tr><tr><td>Quantity<\/td><td>_____ Units<\/td><\/tr><tr><td>Delivery Destination<\/td><td>__________<\/td><\/tr><tr><td>Required Delivery Date<\/td><td>__________<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-wd-title title wd-bfb15d8c\"><span class=\"ez-toc-section\" id=\"Recommended_RFQ_Attachments\"><\/span>Recommended RFQ Attachments<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Single-Line Diagram (SLD)<\/li>\n\n\n\n<li>Electricity bills showing reactive energy charges, if applicable<\/li>\n\n\n\n<li>Load and power-factor measurement records<\/li>\n\n\n\n<li>Transformer nameplate<\/li>\n\n\n\n<li>Harmonic measurement report<\/li>\n\n\n\n<li>Existing capacitor bank specifications<\/li>\n\n\n\n<li>Electrical-room layout<\/li>\n\n\n\n<li>Installation environment details<\/li>\n\n\n\n<li>Applicable technical standards<\/li>\n\n\n\n<li>Required factory testing and documentation<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-2cb8323f\">For buyers in Ukraine, Ethiopia, Vietnam, Thailand, Myanmar, Uzbekistan, Russia and Nigeria, provide the exact project location and site conditions rather than assuming one standard cabinet configuration will fit every market.<\/p>\n\n\n\n<h2 class=\"wp-block-wd-title title wd-cc816240\"><span class=\"ez-toc-section\" id=\"9_Power_Factor_Correction_Solutions_from_DHDL\"><\/span>9. Power Factor Correction Solutions from DHDL<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-61b456cf\">DHDL manufactures power distribution equipment for industrial, commercial, utility and infrastructure applications.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-27eaa0d1\">Its GGJ low-voltage reactive power compensation cabinet can be configured with capacitors, automatic controllers, switching devices, protection equipment and monitoring functions according to project requirements.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-811e562d\">DHDL also supplies low-voltage distribution cabinets, transformers and related equipment, allowing buyers to discuss electrical interfaces as part of a wider distribution project.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-dc906fed\">For industrial power factor correction projects in Vietnam, Thailand, Ethiopia, Nigeria, Uzbekistan, Ukraine, Myanmar and Russia, submit the following information for technical review:<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-e058f45b\">System Voltage + Maximum kW + Existing PF + Target PF + Harmonic Data + Transformer Specifications + Site Conditions + Quantity<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-75a96197\">A properly specified power factor correction panel should deliver the required compensation while avoiding unnecessary switching, resonance risks and installation changes.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-ddef5e36\">DHDL \u2014 Customized <a href=\"https:\/\/dinghongtransformer.com\/project\/thailand-industrial-park-power-distribution-expansion-project\/\" data-type=\"page\" data-id=\"37307\"><strong><em>Power Distribution<\/em><\/strong><\/a> and Reactive Power Compensation Solutions for Global Industrial Projects.<\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-200905a7\">Website: <a href=\"https:\/\/dinghongtransformer.com\/?utm_source=chatgpt.com\">https:\/\/dinghongtransformer.com\/<\/a><\/p>\n\n\n\n<p class=\"wp-block-wd-paragraph wd-fef95436\">Product: <a href=\"https:\/\/dinghongtransformer.com\/fr\/produit\/ggj-low-voltage-reactive-power-compensation-cabinet-for-power-factor-correction\/?utm_source=chatgpt.com\">GGJ Low-Voltage Reactive Power Compensation Cabinet<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Learn how to size a power factor correction panel using kVAR calculations, capacitor steps and harmonic data. Includes technical specifications and an RFQ checklist.<\/p>","protected":false},"author":1,"featured_media":38906,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[71,73,70],"tags":[],"class_list":["post-38905","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-case-studies","category-industry-standards","category-product-insights"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Power Factor Correction Panel Sizing: kVAR Calculation, Detuned Reactors &amp; RFQ Checklist - Dinghongtransformer<\/title>\n<meta name=\"description\" content=\"Learn how to size a power factor correction panel using kVAR calculations, capacitor steps and harmonic data. 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