{"id":100156,"date":"2026-02-15T20:21:27","date_gmt":"2026-02-15T20:21:27","guid":{"rendered":"https:\/\/vibromera.eu\/?post_type=calculator&#038;p=100156"},"modified":"2026-04-05T15:40:20","modified_gmt":"2026-04-05T15:40:20","slug":"motor-efficiency-calculator","status":"publish","type":"calculator","link":"https:\/\/vibromera.eu\/bn\/calculators\/motor-efficiency-calculator\/","title":{"rendered":"\u09ae\u09cb\u099f\u09b0 \u09a6\u0995\u09cd\u09b7\u09a4\u09be \u0995\u09cd\u09af\u09be\u09b2\u0995\u09c1\u09b2\u09c7\u099f\u09b0 | IE1\u2013IE5 \u09b8\u099e\u09cd\u099a\u09af\u09bc \u09b8\u09b0\u099e\u09cd\u099c\u09be\u09ae"},"content":{"rendered":"\n<script type=\"application\/ld+json\">\n{\"@context\":\"https:\/\/schema.org\",\"@type\":\"WebApplication\",\"name\":\"Motor Efficiency Calculator\",\"alternateName\":[\"IE Class Comparison Tool\",\"Motor Energy Savings Calculator\"],\"description\":\"Free motor efficiency calculator per IEC 60034-30-1. Compare IE1 to IE5, calculate energy consumption, annual cost, and payback period for motor upgrades.\",\"url\":\"https:\/\/vibromera.eu\/calculators\/motor-efficiency-calculator\/\",\"applicationCategory\":\"Engineering Calculator\",\"operatingSystem\":\"Any (Web Browser)\",\"offers\":{\"@type\":\"Offer\",\"price\":\"0\",\"priceCurrency\":\"EUR\"},\"creator\":{\"@type\":\"Organization\",\"name\":\"Vibromera\",\"url\":\"https:\/\/vibromera.eu\/\"},\"datePublished\":\"2024-01-01\",\"dateModified\":\"2025-02-14\",\"inLanguage\":\"en\",\"isAccessibleForFree\":true}\n<\/script>\n\n<script type=\"application\/ld+json\">\n{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[\n{\"@type\":\"Question\",\"name\":\"What are IE efficiency classes?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"IE classes (IE1\u2013IE5) are international efficiency classification levels for electric motors defined by IEC 60034-30-1. IE1 is Standard Efficiency, IE2 is High, IE3 is Premium, IE4 is Super Premium, and IE5 is Ultra Premium.\"}},\n{\"@type\":\"Question\",\"name\":\"How much energy can upgrading from IE2 to IE4 save?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"For a typical 11 kW, 4-pole motor running 6000 hours\/year, upgrading from IE2 (89.8%) to IE4 (93.3%) saves approximately 2,300 kWh\/year. At \u20ac0.15\/kWh, that's about \u20ac345\/year.\"}},\n{\"@type\":\"Question\",\"name\":\"What is the minimum efficiency requirement in the EU?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Since July 2023, the EU Ecodesign regulation requires IE4 for motors 75\u2013200 kW and IE3 for motors 0.75\u201375 kW (2\/4\/6 pole). Single-phase motors 0.12 kW and above must meet IE2.\"}},\n{\"@type\":\"Question\",\"name\":\"Does motor speed affect efficiency?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, 2-pole (3000 RPM) motors generally have slightly lower efficiency than 4-pole (1500 RPM) motors of the same power. 6-pole and 8-pole motors have progressively lower efficiencies. IEC 60034-30-1 specifies different limits by pole count.\"}},\n{\"@type\":\"Question\",\"name\":\"What is a typical payback period for a motor upgrade?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Payback periods for motor efficiency upgrades typically range from 1\u20134 years depending on motor size, running hours, and electricity cost. Motors running 6000+ hours\/year with high electricity costs have the shortest payback.\"}}\n]}\n<\/script>\n\n<script type=\"application\/ld+json\">\n{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[\n{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vibromera.eu\/\"},\n{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Calculators\",\"item\":\"https:\/\/vibromera.eu\/calculators\/\"},\n{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Motor Efficiency Calculator\",\"item\":\"https:\/\/vibromera.eu\/calculators\/motor-efficiency-calculator\/\"}\n]}\n<\/script>\n\n<link rel=\"preconnect\" href=\"https:\/\/fonts.googleapis.com\">\n\n<link rel=\"preconnect\" href=\"https:\/\/fonts.gstatic.com\" crossorigin>\n\n<link href=\"https:\/\/fonts.googleapis.com\/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&#038;family=JetBrains+Mono:wght@400;500;600&#038;family=Fraunces:opsz,wght@9..144,700;9..144,800&#038;display=swap\" rel=\"stylesheet\">\n\n<link rel=\"stylesheet\" href=\"https:\/\/cdn.jsdelivr.net\/npm\/katex@0.16.11\/dist\/katex.min.css\">\n\n<style>\n:root{--vc-bg:#f4f1ec;--vc-surface:#fff;--vc-surface-alt:#f8f6f2;--vc-ink:#1a1a1a;--vc-ink-secondary:#5a5650;--vc-ink-muted:#8a857e;--vc-accent:#c85a2a;--vc-accent-hover:#b04d22;--vc-accent-light:#fdf0ea;--vc-blue:#2a5c8c;--vc-blue-light:#eaf1f8;--vc-green:#2a7a4b;--vc-green-light:#eaf8ef;--vc-yellow:#a67c00;--vc-yellow-light:#fef9e8;--vc-red:#b91c1c;--vc-red-light:#fef2f2;--vc-border:#d9d4cc;--vc-border-light:#e8e4dd;--vc-shadow:0 1px 3px rgba(26,26,26,.06),0 4px 12px rgba(26,26,26,.04);--vc-radius:8px;--vc-radius-lg:12px;--vc-font:'DM Sans',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;--vc-mono:'JetBrains Mono','Consolas',monospace;--vc-display:'Fraunces',Georgia,serif}\n.vc-calculator{font-family:var(--vc-font);font-size:15px;line-height:1.65;color:var(--vc-ink);max-width:960px;margin:0 auto;padding:20px 16px 40px;-webkit-font-smoothing:antialiased}.vc-calculator *,.vc-calculator *::before,.vc-calculator *::after{box-sizing:border-box}\n.vc-header{text-align:center;padding:48px 24px 40px;position:relative}.vc-header::after{content:'';position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:80px;height:3px;background:var(--vc-accent);border-radius:2px}.vc-header-eyebrow{font-family:var(--vc-mono);font-size:11px;font-weight:500;letter-spacing:.15em;text-transform:uppercase;color:var(--vc-accent);margin:0 0 12px}.vc-header-title{font-family:var(--vc-display);font-size:clamp(24px,4vw,36px);font-weight:800;line-height:1.15;color:var(--vc-ink);margin:0 0 16px;letter-spacing:-.02em}.vc-header-subtitle{font-size:15px;color:var(--vc-ink-secondary);margin:0 auto 20px;max-width:600px}\n.vc-badges{display:inline-flex;gap:8px;flex-wrap:wrap;justify-content:center}.vc-badge{font-family:var(--vc-mono);font-size:11px;font-weight:500;padding:4px 10px;border-radius:4px;background:var(--vc-surface);border:1px solid var(--vc-border);color:var(--vc-ink-secondary)}\n.vc-card{background:var(--vc-surface);border:1px solid var(--vc-border);border-radius:var(--vc-radius-lg);box-shadow:var(--vc-shadow);overflow:hidden;margin-top:32px}\n.vc-form{padding:24px}.vc-form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}@media(max-width:600px){.vc-form-grid{grid-template-columns:1fr}}.vc-field{display:flex;flex-direction:column}.vc-field-full{grid-column:1\/-1}\n.vc-label{font-size:12px;font-weight:600;letter-spacing:.04em;text-transform:uppercase;color:var(--vc-ink-secondary);margin-bottom:6px}.vc-label-hint{font-weight:400;text-transform:none;letter-spacing:0;color:var(--vc-ink-muted);font-size:11px}\n.vc-select,.vc-input{width:100%;padding:10px 12px;border:1.5px solid var(--vc-border);border-radius:6px;font-family:var(--vc-font);font-size:14px;color:var(--vc-ink);background:var(--vc-surface);transition:border-color .15s,box-shadow .15s}.vc-select{padding-right:36px;appearance:none;cursor:pointer;background-image:url(\"data:image\/svg+xml,%3Csvg xmlns='http:\/\/www.w3.org\/2000\/svg' width='16' height='16' fill='none' stroke='%235a5650' stroke-width='2'%3E%3Cpath d='M4 6l4 4 4-4'\/%3E%3C\/svg%3E\");background-repeat:no-repeat;background-position:right 10px center}.vc-select:focus,.vc-input:focus{outline:none;border-color:var(--vc-accent);box-shadow:0 0 0 3px rgba(200,90,42,.12)}\n.vc-presets{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px;padding-top:18px;border-top:1px solid var(--vc-border-light)}.vc-presets-label{font-family:var(--vc-mono);font-size:11px;font-weight:500;letter-spacing:.1em;text-transform:uppercase;color:var(--vc-ink-muted);width:100%;margin-bottom:2px}.vc-preset-btn{padding:5px 12px;font-family:var(--vc-font);font-size:12px;font-weight:500;border:1px solid var(--vc-border);border-radius:6px;background:var(--vc-surface-alt);color:var(--vc-ink-secondary);cursor:pointer;transition:all .15s}.vc-preset-btn:hover{border-color:var(--vc-accent);color:var(--vc-accent);background:var(--vc-accent-light)}\n.vc-results{border-top:1px solid var(--vc-border-light);background:var(--vc-surface-alt);padding:0;max-height:0;overflow:hidden;transition:max-height .5s cubic-bezier(.4,0,.2,1),padding .3s}.vc-results.vc-visible{max-height:4000px;padding:24px}\n.vc-results-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}.vc-results-title{font-family:var(--vc-display);font-size:20px;font-weight:700;color:var(--vc-ink);margin:0}\n.vc-copy-btn{display:inline-flex;align-items:center;gap:5px;padding:6px 12px;border:1px solid var(--vc-border);border-radius:6px;background:var(--vc-surface);font-family:var(--vc-font);font-size:12px;font-weight:500;color:var(--vc-ink-secondary);cursor:pointer;transition:all .15s}.vc-copy-btn:hover{border-color:var(--vc-accent);color:var(--vc-accent)}.vc-copy-btn.vc-copied{background:var(--vc-green-light);border-color:var(--vc-green);color:var(--vc-green)}\n.vc-result-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:20px}@media(max-width:500px){.vc-result-grid{grid-template-columns:1fr}}\n.vc-rcard{background:var(--vc-surface);border:1px solid var(--vc-border-light);border-radius:var(--vc-radius);padding:16px;transition:transform .2s}.vc-rcard:hover{transform:translateY(-1px)}.vc-rcard-primary{border-color:var(--vc-accent);border-width:2px;background:linear-gradient(135deg,#fdf6f2,var(--vc-surface));grid-column:1\/-1}\n.vc-rcard-label{font-family:var(--vc-mono);font-size:10px;font-weight:500;letter-spacing:.1em;text-transform:uppercase;color:var(--vc-ink-muted);margin-bottom:4px}.vc-rcard-value{font-family:var(--vc-mono);font-size:22px;font-weight:600;color:var(--vc-ink);line-height:1.2}.vc-rcard-primary .vc-rcard-value{font-size:30px;color:var(--vc-accent)}.vc-rcard-unit{font-size:14px;font-weight:400;color:var(--vc-ink-secondary)}\n.vc-section{margin-top:24px;border:1px solid var(--vc-border);border-radius:var(--vc-radius-lg);background:var(--vc-surface);box-shadow:var(--vc-shadow);overflow:hidden}.vc-section-toggle{width:100%;display:flex;align-items:center;justify-content:space-between;padding:18px 24px;border:none;background:transparent;cursor:pointer;font-family:var(--vc-font);text-align:left;transition:background .15s}.vc-section-toggle:hover{background:var(--vc-surface-alt)}.vc-section-toggle-text{display:flex;align-items:center;gap:10px}.vc-section-icon{font-size:20px;line-height:1}.vc-section-title{font-family:var(--vc-display);font-size:18px;font-weight:700;color:var(--vc-ink);margin:0}.vc-section-chevron{width:20px;height:20px;color:var(--vc-ink-muted);transition:transform .3s;flex-shrink:0}.vc-section.vc-open .vc-section-chevron{transform:rotate(180deg)}.vc-section-body{max-height:0;overflow:hidden;transition:max-height .4s cubic-bezier(.4,0,.2,1)}.vc-section.vc-open .vc-section-body{max-height:20000px}.vc-section-inner{padding:0 24px 24px;border-top:1px solid var(--vc-border-light)}\n.vc-theory h3{font-family:var(--vc-display);font-size:17px;font-weight:700;color:var(--vc-ink);margin:28px 0 10px}.vc-theory h3:first-child{margin-top:20px}.vc-theory p{font-size:14px;color:var(--vc-ink-secondary);margin:0 0 10px}.vc-theory ul{font-size:14px;color:var(--vc-ink-secondary);margin:0 0 12px 18px;padding:0}.vc-theory li{margin-bottom:5px}\n.vc-formula-box{background:var(--vc-surface-alt);border:2px solid var(--vc-border);border-radius:6px;padding:14px 20px;font-family:var(--vc-mono);font-size:16px;font-weight:500;text-align:center;margin:14px 0;color:var(--vc-ink);overflow-x:auto}\n.vc-table{width:100%;border-collapse:collapse;margin:14px 0;font-size:13px}.vc-table th,.vc-table td{padding:10px 12px;border:1px solid var(--vc-border-light);text-align:left}.vc-table th{background:var(--vc-surface-alt);font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--vc-ink-secondary)}.vc-table tr:nth-child(even){background:var(--vc-surface-alt)}@media(max-width:600px){.vc-table{font-size:12px}.vc-table th,.vc-table td{padding:8px}}\n.vc-info-box{background:var(--vc-blue-light);border-left:3px solid var(--vc-blue);padding:14px 16px;border-radius:0 6px 6px 0;margin:14px 0}.vc-info-box p{margin:0;font-size:14px;color:var(--vc-ink-secondary)}\n.vc-faq-list{display:flex;flex-direction:column;gap:8px;margin-top:20px}.vc-faq-item{border:1px solid var(--vc-border-light);border-radius:6px;overflow:hidden}.vc-faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 16px;border:none;background:var(--vc-surface-alt);cursor:pointer;font-family:var(--vc-font);font-size:15px;font-weight:600;color:var(--vc-ink);text-align:left;transition:background .15s}.vc-faq-q:hover{background:#ede9e3}.vc-faq-chevron{width:16px;height:16px;color:var(--vc-ink-muted);flex-shrink:0;transition:transform .25s}.vc-faq-item.vc-open .vc-faq-chevron{transform:rotate(180deg)}.vc-faq-a{max-height:0;overflow:hidden;transition:max-height .35s}.vc-faq-item.vc-open .vc-faq-a{max-height:1200px}.vc-faq-a-inner{padding:14px 16px;border-top:1px solid var(--vc-border-light);font-size:14px;color:var(--vc-ink-secondary)}.vc-faq-a-inner p{margin:0 0 8px}.vc-faq-a-inner p:last-child{margin-bottom:0}.vc-faq-a-inner ul{margin:4px 0 8px 16px;padding:0}.vc-faq-a-inner li{margin-bottom:3px}\n.vc-related{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}.vc-related-link{display:inline-block;padding:8px 16px;font-family:var(--vc-font);font-size:13px;font-weight:600;background:var(--vc-surface-alt);color:var(--vc-ink-secondary);border:1px solid var(--vc-border);border-radius:var(--vc-radius);text-decoration:none;transition:all .15s}.vc-related-link:hover{border-color:var(--vc-accent);color:var(--vc-accent);background:var(--vc-accent-light)}\n.vc-promo{margin-top:24px;padding:20px;background:linear-gradient(135deg,var(--vc-accent-light),var(--vc-surface));border:1px solid var(--vc-border);border-radius:var(--vc-radius-lg);display:flex;align-items:center;gap:16px}.vc-promo-text{flex:1;font-size:14px;color:var(--vc-ink-secondary)}.vc-promo-text strong{color:var(--vc-ink)}.vc-promo-link{padding:8px 20px;font-size:13px;font-weight:700;color:#fff;background:var(--vc-accent);border-radius:var(--vc-radius);text-decoration:none;white-space:nowrap;transition:background .15s}.vc-promo-link:hover{background:var(--vc-accent-hover)}\n.vc-footer{text-align:center;padding:32px 16px;font-size:13px;color:var(--vc-ink-muted)}.vc-footer a{color:var(--vc-accent);text-decoration:none}.vc-footer a:hover{text-decoration:underline}.vc-footer-links{margin-top:8px;font-size:12px}.vc-footer-links a{margin:0 8px}\n@media print{.vc-section-body{max-height:none!important}.vc-faq-a{max-height:none!important}.vc-results{max-height:none!important;padding:24px!important}.vc-copy-btn,.vc-section-chevron,.vc-faq-chevron,.vc-presets,.vc-promo{display:none!important}}\n.vc-viz{margin:20px 0;background:var(--vc-surface);border:1px solid var(--vc-border-light);border-radius:var(--vc-radius);padding:16px;overflow:hidden}.vc-viz svg{width:100%;height:auto;display:block}.vc-viz-title{font-family:var(--vc-mono);font-size:11px;font-weight:500;letter-spacing:0.1em;text-transform:uppercase;color:var(--vc-ink-muted);margin-bottom:12px}\n<\/style>\n\n<div class=\"vc-calculator\" id=\"vc-motor-efficiency\">\n\n<header class=\"vc-header\">\n    <p class=\"vc-header-eyebrow\">Free Engineering Tool<\/p>\n    <h1 class=\"vc-header-title\">Motor Efficiency Calculator<\/h1>\n    <p class=\"vc-header-subtitle\">Compare IE1\u2013IE5 motor efficiency classes per IEC 60034-30-1. Calculate annual energy cost and savings from upgrading to a higher efficiency class.<\/p>\n    <div class=\"vc-badges\"><span class=\"vc-badge\">IEC 60034-30-1<\/span><span class=\"vc-badge\">IE1 \u2013 IE5<\/span><span class=\"vc-badge\">Energy Savings<\/span><\/div>\n<\/header>\n\n<div class=\"vc-card\">\n    <form class=\"vc-form\" id=\"vc-form\" autocomplete=\"off\">\n        <div class=\"vc-form-grid\">\n            <div class=\"vc-field\">\n                <label class=\"vc-label\" for=\"vc-power\">Motor Power <span class=\"vc-label-hint\">(kW)<\/span><\/label>\n                <input class=\"vc-input\" type=\"number\" id=\"vc-power\" inputmode=\"decimal\" step=\"any\" min=\"0.12\" placeholder=\"e.g. 11\" value=\"11\">\n            <\/div>\n            <div class=\"vc-field\">\n                <label class=\"vc-label\" for=\"vc-poles\">Poles<\/label>\n                <select class=\"vc-select\" id=\"vc-poles\">\n                    <option value=\"2\">2-pole (3000 RPM)<\/option>\n                    <option value=\"4\" selected>4-pole (1500 RPM)<\/option>\n                    <option value=\"6\">6-pole (1000 RPM)<\/option>\n                <\/select>\n            <\/div>\n            <div class=\"vc-field\">\n                <label class=\"vc-label\" for=\"vc-class\">Current IE Class<\/label>\n                <select class=\"vc-select\" id=\"vc-class\">\n                    <option value=\"IE1\">IE1 \u2014 Standard Efficiency<\/option>\n                    <option value=\"IE2\" selected>IE2 \u2014 High Efficiency<\/option>\n                    <option value=\"IE3\">IE3 \u2014 Premium Efficiency<\/option>\n                    <option value=\"IE4\">IE4 \u2014 Super Premium<\/option>\n                    <option value=\"IE5\">IE5 \u2014 Ultra Premium<\/option>\n                <\/select>\n            <\/div>\n            <div class=\"vc-field\">\n                <label class=\"vc-label\" for=\"vc-target\">Target IE Class<\/label>\n                <select class=\"vc-select\" id=\"vc-target\">\n                    <option value=\"IE2\">IE2 \u2014 High Efficiency<\/option>\n                    <option value=\"IE3\">IE3 \u2014 Premium Efficiency<\/option>\n                    <option value=\"IE4\" selected>IE4 \u2014 Super Premium<\/option>\n                    <option value=\"IE5\">IE5 \u2014 Ultra Premium<\/option>\n                <\/select>\n            <\/div>\n            <div class=\"vc-field\">\n                <label class=\"vc-label\" for=\"vc-hours\">Running Hours <span class=\"vc-label-hint\">(\/year)<\/span><\/label>\n                <input class=\"vc-input\" type=\"number\" id=\"vc-hours\" inputmode=\"decimal\" step=\"any\" min=\"1\" placeholder=\"e.g. 6000\" value=\"6000\">\n            <\/div>\n            <div class=\"vc-field\">\n                <label class=\"vc-label\" for=\"vc-cost\">Electricity Cost <span class=\"vc-label-hint\">(\u20ac\/kWh)<\/span><\/label>\n                <input class=\"vc-input\" type=\"number\" id=\"vc-cost\" inputmode=\"decimal\" step=\"any\" min=\"0.01\" placeholder=\"e.g. 0.15\" value=\"0.15\">\n            <\/div>\n        <\/div>\n        <div class=\"vc-presets\">\n            <div class=\"vc-presets-label\">Quick presets<\/div>\n            <button type=\"button\" class=\"vc-preset-btn\" data-p=\"7.5\" data-po=\"4\" data-c=\"IE2\" data-t=\"IE3\">7.5 kW IE2\u2192IE3<\/button>\n            <button type=\"button\" class=\"vc-preset-btn\" data-p=\"11\" data-po=\"4\" data-c=\"IE2\" data-t=\"IE4\">11 kW IE2\u2192IE4<\/button>\n            <button type=\"button\" class=\"vc-preset-btn\" data-p=\"55\" data-po=\"4\" data-c=\"IE3\" data-t=\"IE4\">55 kW IE3\u2192IE4<\/button>\n            <button type=\"button\" class=\"vc-preset-btn\" data-p=\"110\" data-po=\"2\" data-c=\"IE2\" data-t=\"IE4\">110 kW IE2\u2192IE4<\/button>\n        <\/div>\n    <\/form>\n\n    <div class=\"vc-results\" id=\"vc-results\">\n        <div class=\"vc-results-head\"><h2 class=\"vc-results-title\">Results<\/h2>\n            <button type=\"button\" class=\"vc-copy-btn\" id=\"vc-copy-btn\"><svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><rect x=\"9\" y=\"9\" width=\"13\" height=\"13\" rx=\"2\"\/><path d=\"M5 15H4a2 2 0 01-2-2V4a2 2 0 012-2h9a2 2 0 012 2v1\"\/><\/svg> Copy<\/button>\n        <\/div>\n        <div class=\"vc-result-grid\">\n            <div class=\"vc-rcard vc-rcard-primary\">\n                <div class=\"vc-rcard-label\">Annual Energy Savings<\/div>\n                <div class=\"vc-rcard-value\" id=\"vc-r-savings\">\u2014<\/div>\n            <\/div>\n            <div class=\"vc-rcard\"><div class=\"vc-rcard-label\">Current Efficiency<\/div><div class=\"vc-rcard-value\" id=\"vc-r-eff1\">\u2014<\/div><\/div>\n            <div class=\"vc-rcard\"><div class=\"vc-rcard-label\">Target Efficiency<\/div><div class=\"vc-rcard-value\" id=\"vc-r-eff2\">\u2014<\/div><\/div>\n            <div class=\"vc-rcard\"><div class=\"vc-rcard-label\">Current Annual Energy<\/div><div class=\"vc-rcard-value\" id=\"vc-r-energy1\">\u2014<\/div><\/div>\n            <div class=\"vc-rcard\"><div class=\"vc-rcard-label\">Target Annual Energy<\/div><div class=\"vc-rcard-value\" id=\"vc-r-energy2\">\u2014<\/div><\/div>\n            <div class=\"vc-rcard\"><div class=\"vc-rcard-label\">Current Annual Cost<\/div><div class=\"vc-rcard-value\" id=\"vc-r-cost1\">\u2014<\/div><\/div>\n            <div class=\"vc-rcard\"><div class=\"vc-rcard-label\">Target Annual Cost<\/div><div class=\"vc-rcard-value\" id=\"vc-r-cost2\">\u2014<\/div><\/div>\n            <div class=\"vc-rcard\" style=\"grid-column:1\/-1\"><div class=\"vc-rcard-label\">Annual Cost Savings<\/div><div class=\"vc-rcard-value\" id=\"vc-r-costsave\">\u2014<\/div><\/div>\n        <\/div>\n        <div class=\"vc-viz\" id=\"vc-viz\"><div class=\"vc-viz-title\">Annual Energy Cost by IE Class<\/div><div id=\"vc-viz-svg\"><\/div><\/div>\n    <\/div>\n<\/div>\n\n<div class=\"vc-section vc-open\" id=\"vc-sec-theory\">\n    <button type=\"button\" class=\"vc-section-toggle\" aria-expanded=\"true\"><span class=\"vc-section-toggle-text\"><span class=\"vc-section-icon\">\ud83d\udcd8<\/span><span class=\"vc-section-title\">IE Efficiency Classes &amp; Formulas<\/span><\/span><svg class=\"vc-section-chevron\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M6 9l6 6 6-6\"\/><\/svg><\/button>\n    <div class=\"vc-section-body\"><div class=\"vc-section-inner vc-theory\">\n        <h3>Energy Consumption Formula<\/h3>\n        <div class=\"vc-formula-box\" id=\"vc-katex-1\"><\/div>\n        <div class=\"vc-formula-box\" id=\"vc-katex-2\"><\/div>\n        <h3>IE Class Minimum Efficiencies (4-pole, 50 Hz)<\/h3>\n        <table class=\"vc-table\">\n            <thead><tr><th>Power (kW)<\/th><th>IE1 (%)<\/th><th>IE2 (%)<\/th><th>IE3 (%)<\/th><th>IE4 (%)<\/th><th>IE5 (%)<\/th><\/tr><\/thead>\n            <tbody>\n                <tr><td>0.75<\/td><td>72.1<\/td><td>77.4<\/td><td>80.7<\/td><td>83.5<\/td><td>85.7<\/td><\/tr>\n                <tr><td>1.5<\/td><td>77.2<\/td><td>81.3<\/td><td>84.2<\/td><td>86.7<\/td><td>88.6<\/td><\/tr>\n                <tr><td>3<\/td><td>81.5<\/td><td>84.6<\/td><td>87.1<\/td><td>89.3<\/td><td>90.9<\/td><\/tr>\n                <tr><td>7.5<\/td><td>85.7<\/td><td>88.1<\/td><td>90.4<\/td><td>92.0<\/td><td>93.4<\/td><\/tr>\n                <tr><td>11<\/td><td>87.0<\/td><td>89.4<\/td><td>91.4<\/td><td>93.0<\/td><td>94.0<\/td><\/tr>\n                <tr><td>22<\/td><td>89.5<\/td><td>91.3<\/td><td>93.0<\/td><td>94.3<\/td><td>95.0<\/td><\/tr>\n                <tr><td>55<\/td><td>91.8<\/td><td>93.2<\/td><td>94.6<\/td><td>95.7<\/td><td>96.1<\/td><\/tr>\n                <tr><td>110<\/td><td>93.0<\/td><td>94.3<\/td><td>95.4<\/td><td>96.4<\/td><td>96.8<\/td><\/tr>\n                <tr><td>200<\/td><td>94.0<\/td><td>95.0<\/td><td>96.0<\/td><td>96.8<\/td><td>97.2<\/td><\/tr>\n            <\/tbody>\n        <\/table>\n        <div class=\"vc-info-box\"><p><strong>Source:<\/strong> IEC 60034-30-1:2014. Values shown are for 4-pole, 50 Hz motors. 2-pole and 6-pole motors have different efficiency limits.<\/p><\/div>\n    <\/div><\/div>\n<\/div>\n\n<div class=\"vc-section\" id=\"vc-sec-related\">\n    <button type=\"button\" class=\"vc-section-toggle\" aria-expanded=\"false\"><span class=\"vc-section-toggle-text\"><span class=\"vc-section-icon\">\ud83d\udd17<\/span><span class=\"vc-section-title\">Related Calculators<\/span><\/span><svg class=\"vc-section-chevron\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M6 9l6 6 6-6\"\/><\/svg><\/button>\n    <div class=\"vc-section-body\"><div class=\"vc-section-inner\"><div class=\"vc-related\">\n        <a class=\"vc-related-link\" href=\"\/calculators\/condition-monitoring-method-selector\/\">Condition Monitoring Selector<\/a>\n        <a class=\"vc-related-link\" href=\"\/calculators\/equipment-failure-classifier\/\">Equipment Failure Classifier<\/a>\n        <a class=\"vc-related-link\" href=\"\/calculators\/thermography-limits\/\">Thermography Limits<\/a>\n    <\/div><\/div><\/div>\n<\/div>\n\n<div class=\"vc-section\" id=\"vc-sec-faq\">\n    <button type=\"button\" class=\"vc-section-toggle\" aria-expanded=\"false\"><span class=\"vc-section-toggle-text\"><span class=\"vc-section-icon\">\u2753<\/span><span class=\"vc-section-title\">Frequently Asked Questions<\/span><\/span><svg class=\"vc-section-chevron\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M6 9l6 6 6-6\"\/><\/svg><\/button>\n    <div class=\"vc-section-body\"><div class=\"vc-section-inner\"><div class=\"vc-faq-list\" id=\"vc-faq-list\"><\/div><\/div><\/div>\n<\/div>\n\n<div class=\"vc-promo\"><div class=\"vc-promo-text\"><strong>Vibromera \u2014 Portable Balancing &amp; Vibration Analysis<\/strong><br>Professional vibration analysis for motor diagnostics. Detect bearing faults, unbalance, and misalignment early.<\/div><a class=\"vc-promo-link\" href=\"https:\/\/vibromera.eu\/\" target=\"_blank\" rel=\"noopener\">Learn More<\/a><\/div>\n<footer class=\"vc-footer\"><p>&copy; 2024\u20132025 <a href=\"https:\/\/vibromera.eu\/\">Vibromera<\/a> \u2014 Engineering Calculators<\/p><p style=\"font-size:12px;margin-top:4px;\">Based on IEC 60034-30-1. Last updated: February 2025<\/p><div class=\"vc-footer-links\"><a href=\"\/calculators\/engineering-calculators\/\">All Calculators<\/a><a href=\"https:\/\/vibromera.eu\/contacts\/\">Contact<\/a><\/div><\/footer>\n<\/div>\n\n<script src=\"https:\/\/cdn.jsdelivr.net\/npm\/katex@0.16.11\/dist\/katex.min.js\"><\/script>\n<script>\n(function(){\n'use strict';\nvar SLUG='motor-efficiency-calculator';\nfunction $(id){return document.getElementById(id)}\nfunction fmt(n,d){if(isNaN(n))return'\u2014';return n.toFixed(d===undefined?2:d).replace(\/(\\.\\d*?)0+$\/,'$1').replace(\/\\.$\/,'')}\n\n\/* Efficiency data: {poles: {class: [[kW, eff%], ...]}} - from IEC 60034-30-1 *\/\nvar EFF={\n    '2':{IE1:[[0.75,72.1],[1.1,75.0],[1.5,77.2],[2.2,79.7],[3,81.5],[4,83.1],[5.5,84.7],[7.5,86.0],[11,87.6],[15,88.7],[18.5,89.3],[22,89.9],[30,90.7],[37,91.2],[45,91.7],[55,92.1],[75,92.7],[90,93.0],[110,93.3],[132,93.5],[160,93.8],[200,94.0],[250,94.3],[315,94.6],[355,94.7]],IE2:[[0.75,77.4],[1.1,79.6],[1.5,81.3],[2.2,83.2],[3,84.6],[4,85.8],[5.5,87.0],[7.5,88.1],[11,89.4],[15,90.3],[18.5,90.9],[22,91.3],[30,92.0],[37,92.5],[45,92.9],[55,93.2],[75,93.8],[90,94.1],[110,94.3],[132,94.6],[160,94.8],[200,95.0],[250,95.2],[315,95.4],[355,95.6]],IE3:[[0.75,80.7],[1.1,82.7],[1.5,84.2],[2.2,85.9],[3,87.1],[4,88.1],[5.5,89.2],[7.5,90.1],[11,91.2],[15,91.9],[18.5,92.4],[22,92.7],[30,93.3],[37,93.7],[45,94.0],[55,94.3],[75,94.7],[90,95.0],[110,95.2],[132,95.4],[160,95.6],[200,95.8],[250,96.0],[315,96.2],[355,96.2]],IE4:[[0.75,83.5],[1.1,85.2],[1.5,86.5],[2.2,88.0],[3,89.1],[4,90.0],[5.5,90.9],[7.5,91.7],[11,92.6],[15,93.3],[18.5,93.7],[22,94.0],[30,94.5],[37,94.8],[45,95.1],[55,95.4],[75,95.8],[90,96.0],[110,96.2],[132,96.4],[160,96.6],[200,96.8],[250,97.0],[315,97.1],[355,97.1]],IE5:[[0.75,85.7],[1.1,87.2],[1.5,88.4],[2.2,89.7],[3,90.6],[4,91.4],[5.5,92.2],[7.5,92.9],[11,93.7],[15,94.2],[18.5,94.6],[22,94.8],[30,95.3],[37,95.5],[45,95.7],[55,96.0],[75,96.3],[90,96.5],[110,96.6],[132,96.8],[160,96.9],[200,97.1],[250,97.2],[315,97.3],[355,97.4]]},\n    '4':{IE1:[[0.75,72.1],[1.1,75.0],[1.5,77.2],[2.2,79.7],[3,81.5],[4,83.1],[5.5,84.7],[7.5,85.7],[11,87.0],[15,88.0],[18.5,88.6],[22,89.5],[30,90.2],[37,90.8],[45,91.4],[55,91.8],[75,92.4],[90,92.7],[110,93.0],[132,93.3],[160,93.5],[200,94.0],[250,94.3],[315,94.6],[355,94.7]],IE2:[[0.75,77.4],[1.1,79.6],[1.5,81.3],[2.2,83.2],[3,84.6],[4,85.8],[5.5,87.0],[7.5,88.1],[11,89.4],[15,90.3],[18.5,90.9],[22,91.3],[30,92.0],[37,92.5],[45,92.9],[55,93.2],[75,93.8],[90,94.1],[110,94.3],[132,94.6],[160,94.8],[200,95.0],[250,95.2],[315,95.4],[355,95.6]],IE3:[[0.75,80.7],[1.1,82.7],[1.5,84.2],[2.2,85.9],[3,87.1],[4,88.1],[5.5,89.2],[7.5,90.4],[11,91.4],[15,92.1],[18.5,92.6],[22,93.0],[30,93.6],[37,93.9],[45,94.2],[55,94.6],[75,95.0],[90,95.2],[110,95.4],[132,95.6],[160,95.8],[200,96.0],[250,96.0],[315,96.2],[355,96.2]],IE4:[[0.75,83.5],[1.1,85.2],[1.5,86.7],[2.2,88.2],[3,89.3],[4,90.2],[5.5,91.2],[7.5,92.0],[11,93.0],[15,93.5],[18.5,93.9],[22,94.3],[30,94.7],[37,95.0],[45,95.3],[55,95.7],[75,96.0],[90,96.2],[110,96.4],[132,96.6],[160,96.7],[200,96.8],[250,97.0],[315,97.1],[355,97.1]],IE5:[[0.75,85.7],[1.1,87.2],[1.5,88.6],[2.2,90.0],[3,90.9],[4,91.7],[5.5,92.5],[7.5,93.4],[11,94.0],[15,94.5],[18.5,94.8],[22,95.0],[30,95.4],[37,95.7],[45,95.9],[55,96.1],[75,96.4],[90,96.6],[110,96.8],[132,96.9],[160,97.0],[200,97.2],[250,97.3],[315,97.4],[355,97.4]]},\n    '6':{IE1:[[0.75,70.0],[1.1,72.9],[1.5,75.2],[2.2,77.7],[3,79.7],[4,81.4],[5.5,83.1],[7.5,84.7],[11,86.2],[15,87.3],[18.5,88.0],[22,88.6],[30,89.5],[37,90.1],[45,90.7],[55,91.2],[75,91.9],[90,92.3],[110,92.6],[132,92.9],[160,93.2],[200,93.5],[250,93.8],[315,94.1],[355,94.3]],IE2:[[0.75,75.9],[1.1,78.1],[1.5,79.8],[2.2,81.8],[3,83.3],[4,84.6],[5.5,85.8],[7.5,87.0],[11,88.4],[15,89.4],[18.5,90.0],[22,90.5],[30,91.3],[37,91.8],[45,92.2],[55,92.6],[75,93.2],[90,93.5],[110,93.8],[132,94.1],[160,94.3],[200,94.6],[250,94.8],[315,95.0],[355,95.1]],IE3:[[0.75,78.9],[1.1,81.0],[1.5,82.5],[2.2,84.3],[3,85.6],[4,86.8],[5.5,88.0],[7.5,89.1],[11,90.3],[15,91.2],[18.5,91.7],[22,92.2],[30,92.9],[37,93.3],[45,93.7],[55,94.1],[75,94.6],[90,94.9],[110,95.1],[132,95.4],[160,95.6],[200,95.8],[250,96.0],[315,96.0],[355,96.0]],IE4:[[0.75,81.7],[1.1,83.5],[1.5,85.0],[2.2,86.6],[3,87.7],[4,88.7],[5.5,89.8],[7.5,90.7],[11,91.7],[15,92.4],[18.5,92.8],[22,93.2],[30,93.8],[37,94.2],[45,94.5],[55,94.8],[75,95.2],[90,95.5],[110,95.7],[132,95.9],[160,96.1],[200,96.3],[250,96.4],[315,96.6],[355,96.7]],IE5:[[0.75,83.9],[1.1,85.6],[1.5,87.0],[2.2,88.4],[3,89.4],[4,90.3],[5.5,91.2],[7.5,92.0],[11,92.9],[15,93.5],[18.5,93.9],[22,94.2],[30,94.7],[37,95.0],[45,95.3],[55,95.5],[75,95.8],[90,96.1],[110,96.2],[132,96.4],[160,96.5],[200,96.7],[250,96.8],[315,96.9],[355,97.0]]}\n};\n\nfunction getEff(poles,cls,kW){\n    var data=EFF[poles]&&EFF[poles][cls];if(!data)return null;\n    if(kW<=data[0][0])return data[0][1];\n    if(kW>=data[data.length-1][0])return data[data.length-1][1];\n    for(var i=0;i<data.length-1;i++){\n        if(kW>=data[i][0]&&kW<=data[i+1][0]){\n            var f=(kW-data[i][0])\/(data[i+1][0]-data[i][0]);\n            return data[i][1]+f*(data[i+1][1]-data[i][1]);\n        }\n    }\n    return null;\n}\n\nfunction calculate(){\n    var kW=parseFloat($('vc-power').value);\n    var poles=$('vc-poles').value;\n    var cls=$('vc-class').value;\n    var tgt=$('vc-target').value;\n    var hrs=parseFloat($('vc-hours').value);\n    var cost=parseFloat($('vc-cost').value);\n    if(!kW||kW<=0||!hrs||hrs<=0||!cost||cost<=0){$('vc-results').classList.remove('vc-visible');return}\n\n    var eff1=getEff(poles,cls,kW);\n    var eff2=getEff(poles,tgt,kW);\n    if(!eff1||!eff2){$('vc-results').classList.remove('vc-visible');return}\n\n    var e1=kW\/eff1*100*hrs; \/\/ kWh\n    var e2=kW\/eff2*100*hrs;\n    var c1=e1*cost;\n    var c2=e2*cost;\n    var savE=e1-e2;\n    var savC=c1-c2;\n\n    $('vc-r-eff1').innerHTML=fmt(eff1,1)+' <span class=\"vc-rcard-unit\">% ('+cls+')<\/span>';\n    $('vc-r-eff2').innerHTML=fmt(eff2,1)+' <span class=\"vc-rcard-unit\">% ('+tgt+')<\/span>';\n    $('vc-r-energy1').innerHTML=fmt(e1,0)+' <span class=\"vc-rcard-unit\">kWh\/yr<\/span>';\n    $('vc-r-energy2').innerHTML=fmt(e2,0)+' <span class=\"vc-rcard-unit\">kWh\/yr<\/span>';\n    $('vc-r-cost1').innerHTML='\u20ac'+fmt(c1,0)+' <span class=\"vc-rcard-unit\">\/yr<\/span>';\n    $('vc-r-cost2').innerHTML='\u20ac'+fmt(c2,0)+' <span class=\"vc-rcard-unit\">\/yr<\/span>';\n    $('vc-r-savings').innerHTML=fmt(savE,0)+' <span class=\"vc-rcard-unit\">kWh\/yr<\/span>';\n    $('vc-r-costsave').innerHTML='\u20ac'+fmt(savC,0)+' <span class=\"vc-rcard-unit\">\/yr saved ('+(savC>0?'+':'')+fmt(savC\/c1*100,1)+'%)<\/span>';\n    $('vc-results').classList.add('vc-visible');\n    drawMotorViz(kW, poles, hrs, cost, cls, tgt);\n    saveHistory({kW:kW,poles:poles,cls:cls,tgt:tgt,savE:fmt(savE,0),_summary:kW+'kW '+cls+'\u2192'+tgt+': '+fmt(savE,0)+' kWh\/yr saved'});\n}\n\nfunction drawMotorViz(kW, poles, hrs, costPer, curCls, tgtCls) {\n    var el = $('vc-viz-svg'); if (!el) return;\n    var classes = ['IE1', 'IE2', 'IE3', 'IE4', 'IE5'];\n    var colors = ['#94a3b8', '#60a5fa', '#34d399', 'var(--vc-accent)', '#a78bfa'];\n    var costs = [];\n    classes.forEach(function(c) {\n        var eff = getEff(poles, c, kW);\n        if (eff) { costs.push(kW \/ eff * 100 * hrs * costPer); } else { costs.push(0); }\n    });\n    var maxC = Math.max.apply(null, costs);\n    if (maxC <= 0) return;\n    var W = 460, H = 200, mx = 50, my = 20, bw = 50, gap = 18;\n    var pw = classes.length * (bw + gap) - gap;\n    var ox = (W - pw) \/ 2;\n    var ph = H - my - 35;\n    var s = '<svg viewBox=\"0 0 ' + W + ' ' + H + '\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">';\n    s += '<rect width=\"' + W + '\" height=\"' + H + '\" fill=\"var(--vc-surface)\" rx=\"4\"\/>';\n    classes.forEach(function(c, i) {\n        if (costs[i] <= 0) return;\n        var bh = costs[i] \/ maxC * ph;\n        var x = ox + i * (bw + gap), y = my + ph - bh;\n        var isCur = (c === curCls), isTgt = (c === tgtCls);\n        s += '<rect x=\"' + x + '\" y=\"' + y.toFixed(1) + '\" width=\"' + bw + '\" height=\"' + bh.toFixed(1) + '\" rx=\"3\" fill=\"' + colors[i] + '\" opacity=\"' + (isCur || isTgt ? '1' : '0.5') + '\" stroke=\"' + (isCur ? 'var(--vc-ink)' : isTgt ? 'var(--vc-accent)' : 'none') + '\" stroke-width=\"' + (isCur || isTgt ? '2' : '0') + '\"\/>';\n        s += '<text x=\"' + (x + bw \/ 2) + '\" y=\"' + (y - 4).toFixed(1) + '\" text-anchor=\"middle\" font-size=\"9\" font-weight=\"600\" font-family=\"var(--vc-mono)\" fill=\"' + colors[i] + '\">\\u20AC' + fmt(costs[i], 0) + '<\/text>';\n        s += '<text x=\"' + (x + bw \/ 2) + '\" y=\"' + (my + ph + 14) + '\" text-anchor=\"middle\" font-size=\"10\" font-weight=\"' + (isCur || isTgt ? '700' : '500') + '\" font-family=\"var(--vc-mono)\" fill=\"var(--vc-ink-secondary)\">' + c + '<\/text>';\n        if (isCur) s += '<text x=\"' + (x + bw \/ 2) + '\" y=\"' + (my + ph + 26) + '\" text-anchor=\"middle\" font-size=\"7\" font-family=\"var(--vc-mono)\" fill=\"var(--vc-ink-muted)\">current<\/text>';\n        if (isTgt) s += '<text x=\"' + (x + bw \/ 2) + '\" y=\"' + (my + ph + 26) + '\" text-anchor=\"middle\" font-size=\"7\" font-family=\"var(--vc-mono)\" fill=\"var(--vc-accent)\">target<\/text>';\n    });\n    s += '<\/svg>';\n    el.innerHTML = s;\n}\n\n$('vc-form').addEventListener('input',calculate);\n$('vc-form').addEventListener('change',calculate);\n\ndocument.querySelectorAll('.vc-preset-btn').forEach(function(btn){btn.addEventListener('click',function(e){e.preventDefault();$('vc-power').value=this.getAttribute('data-p');$('vc-poles').value=this.getAttribute('data-po');$('vc-class').value=this.getAttribute('data-c');$('vc-target').value=this.getAttribute('data-t');calculate()})});\n\n$('vc-copy-btn').addEventListener('click',function(){var text='Motor Efficiency Comparison\\n\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\\nPower: '+$('vc-power').value+' kW\\nCurrent: '+$('vc-r-eff1').textContent+'\\nTarget: '+$('vc-r-eff2').textContent+'\\nEnergy Savings: '+$('vc-r-savings').textContent+'\\nCost Savings: '+$('vc-r-costsave').textContent+'\\n\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\\nvibromera.eu\/calculators\/motor-efficiency-calculator\/';if(navigator.clipboard){navigator.clipboard.writeText(text).then(function(){var b=$('vc-copy-btn');b.classList.add('vc-copied');b.innerHTML='<svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><polyline points=\"20 6 9 17 4 12\"\/><\/svg> Copied!';setTimeout(function(){b.classList.remove('vc-copied');b.innerHTML='<svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><rect x=\"9\" y=\"9\" width=\"13\" height=\"13\" rx=\"2\"\/><path d=\"M5 15H4a2 2 0 01-2-2V4a2 2 0 012-2h9a2 2 0 012 2v1\"\/><\/svg> Copy'},2000)})}});\n\ndocument.querySelectorAll('.vc-section-toggle').forEach(function(btn){btn.addEventListener('click',function(){var s=this.closest('.vc-section');s.classList.toggle('vc-open');this.setAttribute('aria-expanded',s.classList.contains('vc-open'))})});\n\nvar faqData=[\n    {q:'What are IE efficiency classes?',a:'<p>IE classes (IE1\u2013IE5) are international efficiency classification levels defined by <strong>IEC 60034-30-1<\/strong>:<\/p><ul><li><strong>IE1<\/strong> \u2014 Standard Efficiency<\/li><li><strong>IE2<\/strong> \u2014 High Efficiency<\/li><li><strong>IE3<\/strong> \u2014 Premium Efficiency<\/li><li><strong>IE4<\/strong> \u2014 Super Premium<\/li><li><strong>IE5<\/strong> \u2014 Ultra Premium<\/li><\/ul>'},\n    {q:'How much energy can upgrading IE class save?',a:'<p>For a typical 11 kW, 4-pole motor running 6000 hrs\/year, upgrading from IE2 (89.4%) to IE4 (93.0%) saves approximately <strong>2,300 kWh\/year<\/strong>. At \u20ac0.15\/kWh, that is about <strong>\u20ac345\/year<\/strong>.<\/p>'},\n    {q:'What is the minimum efficiency required in the EU?',a:'<p>Since July 2023, the EU Ecodesign regulation requires <strong>IE4 for motors 75\u2013200 kW<\/strong> and <strong>IE3 for motors 0.75\u201375 kW<\/strong> (2\/4\/6 pole). Single-phase motors \u22650.12 kW must meet IE2.<\/p>'},\n    {q:'Does motor speed affect efficiency?',a:'<p>Yes. 4-pole motors (1500 RPM) generally have the highest efficiency. 2-pole (3000 RPM) and 6-pole (1000 RPM) motors have slightly lower efficiency. IEC 60034-30-1 provides separate limits for each pole count.<\/p>'},\n    {q:'What is a typical payback period?',a:'<p>Payback periods for motor upgrades typically range from <strong>1\u20134 years<\/strong>. Motors running 6000+ hrs\/year with high electricity costs have the shortest payback. The exact payback depends on the price difference between motor classes.<\/p>'}\n];\nvar fl=$('vc-faq-list');faqData.forEach(function(f){fl.innerHTML+='<div class=\"vc-faq-item\"><button type=\"button\" class=\"vc-faq-q\"><span>'+f.q+'<\/span><svg class=\"vc-faq-chevron\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M6 9l6 6 6-6\"\/><\/svg><\/button><div class=\"vc-faq-a\"><div class=\"vc-faq-a-inner\">'+f.a+'<\/div><\/div><\/div>'});\nfl.addEventListener('click',function(e){var b=e.target.closest('.vc-faq-q');if(b)b.closest('.vc-faq-item').classList.toggle('vc-open')});\n\nfunction saveHistory(entry){var key='vc_history_'+SLUG;var arr=[];try{arr=JSON.parse(localStorage.getItem(key))||[]}catch(e){}entry._ts=new Date().toISOString();arr.unshift(entry);if(arr.length>10)arr=arr.slice(0,10);try{localStorage.setItem(key,JSON.stringify(arr))}catch(e){}}\n\nfunction init(){\n    try{\n        katex.render('E_{\\\\text{annual}} = \\\\frac{P_{\\\\text{rated}}}{\\\\eta} \\\\times h_{\\\\text{year}} \\\\quad [\\\\text{kWh}]',$('vc-katex-1'),{displayMode:true,throwOnError:false});\n        katex.render('\\\\Delta E = E_{\\\\text{current}} - E_{\\\\text{target}} = P \\\\times h \\\\times \\\\left(\\\\frac{1}{\\\\eta_1} - \\\\frac{1}{\\\\eta_2}\\\\right)',$('vc-katex-2'),{displayMode:true,throwOnError:false});\n    }catch(e){}\n    calculate();\n}\nif(document.readyState==='loading')document.addEventListener('DOMContentLoaded',init);else init();\n})();\n<\/script>\n","protected":false},"excerpt":{"rendered":"<p>IEC 60034-30-1 \u0985\u09a8\u09c1\u09af\u09be\u09af\u09bc\u09c0 \u09ac\u09bf\u09a8\u09be\u09ae\u09c2\u09b2\u09cd\u09af\u09c7 \u09ae\u09cb\u099f\u09b0 \u09a6\u0995\u09cd\u09b7\u09a4\u09be \u0995\u09cd\u09af\u09be\u09b2\u0995\u09c1\u09b2\u09c7\u099f\u09b0\u0964 IE1\u2013IE5 \u09a6\u0995\u09cd\u09b7\u09a4\u09be \u09b6\u09cd\u09b0\u09c7\u09a3\u09c0 \u09a4\u09c1\u09b2\u09a8\u09be \u0995\u09b0\u09c1\u09a8, \u09ac\u09be\u09b0\u09cd\u09b7\u09bf\u0995 \u09b6\u0995\u09cd\u09a4\u09bf \u0996\u09b0\u099a \u0997\u09a3\u09a8\u09be \u0995\u09b0\u09c1\u09a8 \u098f\u09ac\u0982 \u09ae\u09cb\u099f\u09b0 \u09a6\u0995\u09cd\u09b7\u09a4\u09be \u09b6\u09cd\u09b0\u09c7\u09a3\u09c0 \u0986\u09aa\u0997\u09cd\u09b0\u09c7\u09a1 \u0995\u09b0\u09c7 \u09b8\u099e\u09cd\u099a\u09af\u09bc \u0997\u09a3\u09a8\u09be \u0995\u09b0\u09c1\u09a8\u0964<\/p>","protected":false},"featured_media":0,"template":"","meta":{"ai_generated_summary":"","footnotes":""},"categories":[],"tags":[],"class_list":["post-100156","calculator","type-calculator","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/bn\/wp-json\/wp\/v2\/calculator\/100156","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vibromera.eu\/bn\/wp-json\/wp\/v2\/calculator"}],"about":[{"href":"https:\/\/vibromera.eu\/bn\/wp-json\/wp\/v2\/types\/calculator"}],"version-history":[{"count":2,"href":"https:\/\/vibromera.eu\/bn\/wp-json\/wp\/v2\/calculator\/100156\/revisions"}],"predecessor-version":[{"id":100940,"href":"https:\/\/vibromera.eu\/bn\/wp-json\/wp\/v2\/calculator\/100156\/revisions\/100940"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/bn\/wp-json\/wp\/v2\/media?parent=100156"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/bn\/wp-json\/wp\/v2\/categories?post=100156"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/bn\/wp-json\/wp\/v2\/tags?post=100156"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}