{"id":1824,"date":"2026-07-27T10:31:54","date_gmt":"2026-07-27T02:31:54","guid":{"rendered":"https:\/\/jutrion.com\/?page_id=1824"},"modified":"2026-07-27T10:39:03","modified_gmt":"2026-07-27T02:39:03","slug":"kalkulator-pengaturan-pelindung-tegangan","status":"publish","type":"page","link":"https:\/\/jutrion.com\/id\/tools\/voltage-protector-settings-calculator\/","title":{"rendered":"kalkulator pengaturan pelindung tegangan"},"content":{"rendered":"\n<!-- ===== JUTRION Over\/Under Voltage Protector Settings \u2014 paste into a WordPress \"Custom HTML\" block ===== -->\n<div class=\"jt-calc\">\n  <p class=\"eyebrow\">Surge &amp; voltage<\/p>\n  <h1>Over \/ Under Voltage Protector Settings Calculator<\/h1>\n  <p class=\"tool-lede\">Set a starting over-voltage and under-voltage window and reconnection delay for a voltage protector, based on the nominal voltage and how sensitive the load is. Confirm the final values against the equipment ratings and local rules \u2014 these are engineering starting points, not fixed settings.<\/p>\n\n  <div class=\"jt-card\"><div class=\"jt-grid\">\n    <div class=\"jt-inputs\">\n      <div class=\"jt-field\"><label>System<\/label>\n        <div class=\"jt-seg\" id=\"jt-phase\"><button type=\"button\" data-ph=\"3\" aria-pressed=\"false\">Three-phase<\/button><button type=\"button\" data-ph=\"1\" aria-pressed=\"true\">Single-phase<\/button><\/div>\n      <\/div>\n      <div class=\"jt-field\"><label for=\"jt-nom\">Nominal voltage the device monitors (V)<\/label><input type=\"number\" id=\"jt-nom\" value=\"230\" min=\"1\" step=\"1\" inputmode=\"numeric\"><\/div>\n      <div class=\"jt-field\"><label for=\"jt-sens\">Load sensitivity<\/label>\n        <select id=\"jt-sens\"><option value=\"s\">Sensitive \u2014 electronics, IT, medical<\/option><option value=\"n\" selected>Standard \u2014 mixed loads, appliances<\/option><option value=\"r\">Robust \u2014 motors, heaters, tolerant loads<\/option><\/select>\n      <\/div>\n      <div class=\"jt-field\"><label class=\"jt-check\"><input type=\"checkbox\" id=\"jt-comp\"> Circuit includes a compressor \/ refrigeration<\/label><\/div>\n      <div class=\"jt-note\"><span>\u24d8<\/span><span>A tighter window protects sensitive loads sooner; a wider one reduces nuisance trips on a fluctuating supply. Nominal 230\/400 V follows IEC 60038.<\/span><\/div>\n    <\/div>\n    <div class=\"jt-readout\">\n      <div class=\"jt-rl\">Recommended voltage window<\/div>\n      <div class=\"jt-pair\">\n        <div class=\"jt-rec\"><div class=\"k\">Under-voltage cutoff<\/div><div class=\"v\"><span id=\"jt-uv\">\u2014<\/span> <small id=\"jt-uvp\"><\/small><\/div><\/div>\n        <div class=\"jt-rec\"><div class=\"k\">Over-voltage cutoff<\/div><div class=\"v\"><span id=\"jt-ov\">\u2014<\/span> <small id=\"jt-ovp\"><\/small><\/div><\/div>\n      <\/div>\n      <div class=\"jt-win\">\n        <div class=\"jt-track\"><div class=\"jt-band\" id=\"jt-band\"><\/div><div class=\"jt-nom\" id=\"jt-nommark\"><\/div><\/div>\n        <div class=\"jt-wlabels\"><span>60%<\/span><span id=\"jt-nomlbl\">nominal<\/span><span>140%<\/span><\/div>\n      <\/div>\n      <div class=\"jt-delay\">\n        <div class=\"jt-rec\"><div class=\"k\">Disconnect delay<\/div><div class=\"v\" style=\"font-size:14px\">OV ~0.5 s \u00b7 UV ~2 s<\/div><\/div>\n        <div class=\"jt-rec\"><div class=\"k\">Reconnection delay<\/div><div class=\"v\" id=\"jt-recon\">\u2014<\/div><\/div>\n      <\/div>\n      <button type=\"button\" class=\"jt-copy\" id=\"jt-copy\">Copy result<\/button>\n    <\/div>\n  <\/div><\/div>\n\n  <div class=\"jt-content\">\n    <h2>How the window is chosen<\/h2>\n    <p>A voltage protector disconnects the load when the supply stays outside a set window for longer than a delay, then reconnects after the voltage recovers and a reconnection delay. Sensitive loads use a tighter band (about 90\u2013110 %), standard loads a moderate band (about 85\u2013115 %), and robust loads a wider band (about 80\u2013120 %). Over-voltage damage develops faster than under-voltage, so its disconnect delay is shorter. A compressor or refrigeration load needs a longer reconnection delay so pressures equalise before restart.<\/p>\n    <div class=\"jt-note\"><span>\u26a0<\/span><span><b>Do not widen the window to stop nuisance trips.<\/b> A repeated trip is a message about the supply \u2014 an under-voltage trip points to a weak or overloaded feeder, an over-voltage trip to a grid or neutral fault.<\/span><\/div>\n\n    <h2>Frequently asked questions<\/h2>\n    <div class=\"jt-faq\">\n      <details><summary>Are these values a standard?<\/summary><p>No. They are common engineering starting points. The correct window comes from the connected equipment&#8217;s tolerance, the site&#8217;s supply behaviour, and the applicable installation rules. IEC 60038 defines the nominal voltage the window is built around.<\/p><\/details>\n      <details><summary>Why the reconnection delay?<\/summary><p>Immediate restart after a dip can stress motors and compressors, and rapid short-cycling damages them. A delay of tens of seconds to a few minutes lets the supply settle and compressor pressures equalise.<\/p><\/details>\n      <details><summary>Does this replace an SPD or a breaker?<\/summary><p>No. A protector handles sustained over- and under-voltage only. Transient surge needs an SPD, overcurrent needs a breaker, and earth leakage needs an RCD.<\/p><\/details>\n    <\/div>\n\n    <div class=\"jt-cta\">\n      <h2>Specify the protector<\/h2>\n      <p>With the window and reconnection delay set, choose a single- or three-phase protector with adjustable thresholds and delay.<\/p>\n      <div class=\"jt-cta-btns\">\n        <a class=\"jt-btn\" href=\"https:\/\/jutrion.com\/over-and-under-voltage-protector\/\">Explore voltage protectors<\/a>\n        <a class=\"jt-btn ghost\" href=\"https:\/\/jutrion.com\/contact\/\">Get a free quote<\/a>\n      <\/div>\n      <p class=\"jt-related\">Related products: <a href=\"https:\/\/jutrion.com\/over-and-under-voltage-protector\/\">Voltage Protector<\/a> \u00b7 <a href=\"https:\/\/jutrion.com\/spd\/\">SPD<\/a> \u00b7 <a href=\"https:\/\/jutrion.com\/products\/\">All products<\/a><\/p>\n    <\/div>\n\n    <div class=\"jt-std\"><strong>Standards referenced<\/strong>IEC 60038 (standard voltages) \u00b7 IEC 60364-4-44 (protection against voltage disturbances) \u00b7 EN 50160 (supply voltage characteristics).<\/div>\n    <p class=\"jt-fine\">Starting points for guidance only. Final thresholds and delays must be verified against the connected equipment ratings, the site supply, and local rules by a qualified person.<\/p>\n  <\/div>\n<\/div>\n\n<script>\n(function(){\n  var $=function(id){return document.getElementById(id);};\n  var nom=$('jt-nom'),sens=$('jt-sens'),comp=$('jt-comp'),uv=$('jt-uv'),uvp=$('jt-uvp'),ov=$('jt-ov'),ovp=$('jt-ovp'),\n      band=$('jt-band'),nommark=$('jt-nommark'),nomlbl=$('jt-nomlbl'),recon=$('jt-recon');\n  var phase=1, W={s:[90,110],n:[85,115],r:[80,120]};\n  document.querySelectorAll('#jt-phase button').forEach(function(b){b.addEventListener('click',function(){phase=parseInt(b.dataset.ph,10);document.querySelectorAll('#jt-phase button').forEach(function(x){x.setAttribute('aria-pressed',x===b?'true':'false');});if(phase===3&&nom.value==='230')nom.value='400';if(phase===1&&nom.value==='400')nom.value='230';calc();});});\n  function pos(pct){return ((pct-60)\/80*100);}\n  function calc(){\n    var V=parseFloat(nom.value),w=W[sens.value];\n    if(!(V>0)){uv.textContent='\u2014';ov.textContent='\u2014';uvp.textContent='';ovp.textContent='';recon.textContent='\u2014';return;}\n    var lo=Math.round(V*w[0]\/100),hi=Math.round(V*w[1]\/100);\n    uv.textContent=lo;uvp.textContent='('+w[0]+'%)';ov.textContent=hi;ovp.textContent='('+w[1]+'%)';\n    var l=pos(w[0]),r=pos(w[1]);band.style.left=l+'%';band.style.width=(r-l)+'%';nommark.style.left=pos(100)+'%';nomlbl.textContent=V+' V';\n    recon.textContent=(comp.checked?'180 s':'60 s');\n  }\n  [nom,sens].forEach(function(el){el.addEventListener('input',calc);el.addEventListener('change',calc);});\n  comp.addEventListener('change',calc);\n  $('jt-copy').addEventListener('click',function(){var b=$('jt-copy');var w=W[sens.value];var txt='Nominal: '+nom.value+' V, '+(phase===3?'3-phase':'1-phase')+'\\nUnder-voltage cutoff: '+uv.textContent+' V ('+w[0]+'%)\\nOver-voltage cutoff: '+ov.textContent+' V ('+w[1]+'%)\\nDisconnect: OV ~0.5 s, UV ~2 s\\nReconnection delay: '+recon.textContent;navigator.clipboard.writeText(txt).then(function(){var o=b.textContent;b.textContent='Copied \u2713';setTimeout(function(){b.textContent=o;},1500);}).catch(function(){b.textContent='Press Ctrl+C';});});\n  calc();\n})();\n<\/script>\n<!-- ===== end block ===== -->\n\n","protected":false},"excerpt":{"rendered":"<p>Surge &amp; voltage Over \/ Under Voltage Protector Settings Calculator Set a starting over-voltage and under-voltage window and reconnection delay for a voltage protector, based on the nominal voltage and how sensitive the load is. Confirm the final values against the equipment ratings and local rules \u2014 these are engineering starting points, not fixed settings. [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":1778,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-1824","page","type-page","status-publish","hentry"],"blocksy_meta":[],"_links":{"self":[{"href":"https:\/\/jutrion.com\/id\/wp-json\/wp\/v2\/pages\/1824","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jutrion.com\/id\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/jutrion.com\/id\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/jutrion.com\/id\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/jutrion.com\/id\/wp-json\/wp\/v2\/comments?post=1824"}],"version-history":[{"count":1,"href":"https:\/\/jutrion.com\/id\/wp-json\/wp\/v2\/pages\/1824\/revisions"}],"predecessor-version":[{"id":1825,"href":"https:\/\/jutrion.com\/id\/wp-json\/wp\/v2\/pages\/1824\/revisions\/1825"}],"up":[{"embeddable":true,"href":"https:\/\/jutrion.com\/id\/wp-json\/wp\/v2\/pages\/1778"}],"wp:attachment":[{"href":"https:\/\/jutrion.com\/id\/wp-json\/wp\/v2\/media?parent=1824"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}