{"id":19987,"date":"2025-11-21T01:54:00","date_gmt":"2025-11-20T17:54:00","guid":{"rendered":"https:\/\/viox.com\/?p=19987"},"modified":"2025-11-14T14:54:42","modified_gmt":"2025-11-14T06:54:42","slug":"what-is-breaker-selectivity-coordination-guide","status":"publish","type":"post","link":"https:\/\/test.viox.com\/tl\/what-is-breaker-selectivity-coordination-guide\/","title":{"rendered":"Ano ang \u201cSelectivity\u201d? Gabay ng Pro sa Koordinasyon ng Breaker (at Pag-iwas sa \u201cPatas na Laban\u201d)"},"content":{"rendered":"<div class=\"product-intro\">\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone size-full wp-image-19989\" src=\"https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/What-is-22Selectivity22.webp\" alt=\"What is &quot;Selectivity&quot;\" width=\"800\" height=\"800\" srcset=\"https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/What-is-22Selectivity22.webp 800w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/What-is-22Selectivity22-300x300.webp 300w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/What-is-22Selectivity22-150x150.webp 150w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/What-is-22Selectivity22-768x768.webp 768w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/What-is-22Selectivity22-12x12.webp 12w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/What-is-22Selectivity22-600x600.webp 600w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/What-is-22Selectivity22-100x100.webp 100w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<p>Isang apprentice engineer ang nagtanong, \u201cAng supply ng aking utility ay 100A. Dapat bang ang main breaker ng aking pabrika ay 100A din?\u201d<\/p>\n<p>Una, itama natin nang mahinahon ang terminolohiya, dahil ipinapakita nito ang \u201cMaster-level\u201d na sikreto. Ang main ng pabrika ay hindi isang \u201cMCB\u201d (isang <em>Miniature<\/em> Circuit Breaker, ang \u201cpangbahay\u201d na uri). Ito ay isang <strong>&#8220;<a href=\"https:\/\/test.viox.com\/tl\/mccb\/\">MCCB<\/a>&#8220;<\/strong> (isang <em>Moulded Case<\/em> Circuit Breaker) o isang <strong>&#8220;<a href=\"https:\/\/test.viox.com\/tl\/complete-guide-to-air-circuit-breakers-acb\/\">ACB<\/a>&#8220;<\/strong> (isang <em>Hangin<\/em> Circuit Breaker). Ang mga ito ay \u201cindustrial beasts.\u201d<\/p>\n<p>Ngunit ang <em>tunay<\/em> problema ay ang kanyang tanong. Iminumungkahi niya ang isang <strong>\u201cFair Fight\u201d<\/strong> (100A vs. 100A).<\/p>\n<p>Sa proteksyon ng kuryente, ano ang mangyayari sa isang \u201cfair fight\u201d?<\/p>\n<p>Isang sakuna.<\/p>\n<p>Ikaw <em>Huwag<\/em> kailanman gustuhin ang isang \u201cfair fight.\u201d Gusto mo ng isang \u201chierarchy.\u201d Ang propesyonal na termino para dito ay <strong>\u201cSelectivity,\u201d<\/strong> at narito kung bakit ito ang pinakamahalagang konsepto sa disenyo ng kuryente.<\/p>\n<hr \/>\n<h2>Ang Analohiya ng \u201cPiping ng Tubig\u201d: Ano ang Selectivity?<\/h2>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-19990\" src=\"https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-22Water-Pipe22-Analogy-What-is-Selectivity.webp\" alt=\"The &quot;Water Pipe&quot; Analogy: What is Selectivity?\" width=\"800\" height=\"800\" srcset=\"https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-22Water-Pipe22-Analogy-What-is-Selectivity.webp 800w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-22Water-Pipe22-Analogy-What-is-Selectivity-300x300.webp 300w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-22Water-Pipe22-Analogy-What-is-Selectivity-150x150.webp 150w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-22Water-Pipe22-Analogy-What-is-Selectivity-768x768.webp 768w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-22Water-Pipe22-Analogy-What-is-Selectivity-12x12.webp 12w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-22Water-Pipe22-Analogy-What-is-Selectivity-600x600.webp 600w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-22Water-Pipe22-Analogy-What-is-Selectivity-100x100.webp 100w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<p><strong>Selectivity<\/strong> (tinatawag ding \u201cDiscrimination\u201d) ay nangangahulugang ang <em>pinakamaliit<\/em> na breaker (ang isa na <em>pinakamalapit<\/em> sa fault) ay tumitrip <em>una.<\/em>.<\/p>\n<p>Ang \u201cAha!\u201d na sandali ay <strong>\u201cAng \u2018Piping ng Tubig\u2019 na Analohiya.\u201d<\/strong><\/p>\n<ul>\n<li><strong>Ang Utility Fuse (100A):<\/strong> Ito ang <strong>\u201cPangunahing Tubig ng Lungsod\u201d<\/strong> sa ilalim ng kalye.<\/li>\n<li><strong>Ang Iyong Main Breaker (80A):<\/strong> Ito ang <strong>\u201cAngle Valve\u201d<\/strong> sa ilalim ng iyong lababo sa kusina.<\/li>\n<li><strong>Ang Fault:<\/strong> Ang iyong gripo sa kusina ay nagsimulang tumagas (isang \u201cfault\u201d).<\/li>\n<\/ul>\n<p><strong>Ang Layunin:<\/strong> Gusto mong <em>selectively<\/em> patayin ang \u201cAngle Valve.\u201d Hindi mo <em>Huwag<\/em> gusto na ang isang simpleng pagtagas ng gripo ay papatay sa \u201cPangunahing Tubig ng Lungsod,\u201d na maglulubog sa iyong <em>buong pabrika<\/em> sa kadiliman.<\/p>\n<p>Ipinapakita nito ang pangunahing pilosopiya: <strong>\u201cProtektahan mo ang sa iyo, protektahan ko ang sa akin.\u201d<\/strong> Ang 100A fuse ng utility ay naroroon upang protektahan <em>ang kanilang<\/em> transformer mula sa <em>iyong<\/em> sunog. Ang iyong 80A breaker ay naroroon upang protektahan <em>iyong<\/em> ang panel mula sa fault ng iyong makina. Wala sila sa parehong koponan.<\/p>\n<hr \/>\n<h2>Ang Nakakatakot na Kwento: \u201cAng \u2018Nakakahiyang Tawag'\u201d (aka Nuisance Tripping)<\/h2>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-19991\" src=\"https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-Horror-Story-22The-Shameful-Call22-aka-Nuisance-Tripping.webp\" alt=\"The Horror Story- &quot;The 'Shameful Call'&quot; (aka Nuisance Tripping)\" width=\"800\" height=\"800\" srcset=\"https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-Horror-Story-22The-Shameful-Call22-aka-Nuisance-Tripping.webp 800w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-Horror-Story-22The-Shameful-Call22-aka-Nuisance-Tripping-300x300.webp 300w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-Horror-Story-22The-Shameful-Call22-aka-Nuisance-Tripping-150x150.webp 150w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-Horror-Story-22The-Shameful-Call22-aka-Nuisance-Tripping-768x768.webp 768w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-Horror-Story-22The-Shameful-Call22-aka-Nuisance-Tripping-12x12.webp 12w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-Horror-Story-22The-Shameful-Call22-aka-Nuisance-Tripping-600x600.webp 600w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-Horror-Story-22The-Shameful-Call22-aka-Nuisance-Tripping-100x100.webp 100w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<p>Kaya, ano ang mangyayari kung balewalain mo ito? Paano kung likhain mo ang \u201cFair Fight\u201d na iyon (100A vs. 100A)?<\/p>\n<p>Makukuha mo ang \u201cbangungot\u201d na senaryo na ito: <strong>\u201cNuisance Tripping.\u201d<\/strong><\/p>\n<p>Alas-3 ng madaling araw. Ang isang makina sa iyong linya ay may malubhang (ngunit mapapamahalaan) na short circuit.<\/p>\n<p><strong>Ang Karera:<\/strong> Parehong nakikita ng iyong 100A main breaker at ng 100A main fuse ng utility ang napakalaking fault. Sila ay \u201cnagkakarera\u201d upang makita kung sino ang unang titrip.<\/p>\n<p><strong>Ang \u201cBangungot\u201d:<\/strong> Ang <em>nasa itaas<\/em> fuse ng utility ang nanalo (o pareho silang tumitrip).<\/p>\n<p><strong>Ang Kinahinatnan:<\/strong><\/p>\n<ol>\n<li>Ang iyong <em>buong pabrika<\/em> ay nagdidilim.<\/li>\n<li>Sinusuri mo ang iyong main breaker. Ito ay\u2026 <em>ayos lang.<\/em>.<\/li>\n<li>Napagtanto mo na ang <em>utility\u2019s<\/em> Sira ang piyus. Nasa poste ito na 100 metro ang layo.<\/li>\n<li>Kailangan mong gawin <strong>\u201cAng \u2018Nakakahiyang Tawag'\u201d<\/strong> sa kompanya ng kuryente.<\/li>\n<li>Maghihintay ka ng 4 na oras (sa dilim) para sa isang utility truck, na magbibigay sa iyo ng P5,000 na \u201cemergency call-out\u201d bill para sa pagpapalit ng <em>ang kanilang<\/em> piyus na <em>iyong<\/em> sumabog dahil sa masamang disenyo.<\/li>\n<\/ol>\n<blockquote><p><strong>PRO-TIP:<\/strong> Ikaw <em>Huwag<\/em> gusto mong maging \u201cunang linya ng depensa\u201d mo ang utility. Iyon ang <em>iyong<\/em> trabaho. Ang \u201cnuisance trip\u201d na ito ay isang \u201ccascading failure\u201d na sanhi ng kumpletong kawalan ng Selectivity.<\/p><\/blockquote>\n<hr \/>\n<h2>Ang \u201cKasangkapan ng Dalubhasa\u201d: Bakit ang 80A vs. 100A ay ang <em>Mali<\/em> na Tanong<\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-19992\" src=\"https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-22Masters-Tool22-Why-80A-vs.-100A-is-the-Wrong-Question.webp\" alt=\"The &quot;Master's Tool&quot;: Why 80A vs. 100A is the Wrong Question\" width=\"800\" height=\"800\" srcset=\"https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-22Masters-Tool22-Why-80A-vs.-100A-is-the-Wrong-Question.webp 800w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-22Masters-Tool22-Why-80A-vs.-100A-is-the-Wrong-Question-300x300.webp 300w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-22Masters-Tool22-Why-80A-vs.-100A-is-the-Wrong-Question-150x150.webp 150w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-22Masters-Tool22-Why-80A-vs.-100A-is-the-Wrong-Question-768x768.webp 768w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-22Masters-Tool22-Why-80A-vs.-100A-is-the-Wrong-Question-12x12.webp 12w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-22Masters-Tool22-Why-80A-vs.-100A-is-the-Wrong-Question-600x600.webp 600w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/11\/The-22Masters-Tool22-Why-80A-vs.-100A-is-the-Wrong-Question-100x100.webp 100w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<p>\u201cOkay, naiintindihan ko!\u201d sabi ng aprentis. \u201cMaglalagay na lang ako ng 80A breaker para \u2018talunin\u2019 ang kanilang 100A!\u201d<\/p>\n<p>Ito ang bitag ng \u201cbaguhan\u201d. Ito ay isang <em>hulaan<\/em>.<\/p>\n<p>Ang 80A breaker na iyon <em>maaaring<\/em> ay magiging selective para sa isang <em>maliit na overload<\/em> (tulad ng 90A). Ngunit sa isang <em>napakalaking short circuit<\/em> (hal., 2,000A), parehong makikita ng 80A at 100A breakers ang isang \u201c9-alarm fire\u201d at susubukang mag-trip <em>kaagad<\/em>. Ikaw <em>pa rin<\/em> ay maaaring magkaroon ng isang \u201crace condition.\u201d<\/p>\n<p>\u201cAng mga \u201dbaguhan\u201d ay humuhula gamit ang <em>Amps<\/em>. Ang mga \u201cPro\u201d ay\u201d <em>nagpapatunay<\/em> kasama <em>Oras<\/em>.<\/p>\n<p>Ang \u201cKasangkapan ng Dalubhasa\u201d ay ang <strong>Time-Current Curve (TCC)<\/strong>.<\/p>\n<ul>\n<li>Ito ang \u201cDNA\u201d o \u201creaction-time chart\u201d para sa bawat breaker at piyus.<\/li>\n<li>Ang isang \u201cPro\u201d (tulad ng isang VIOX engineer) ay nagsasagawa ng isang <strong>\u201cCoordination Study\u201d<\/strong> o <strong>\u201cSelectivity Study.\u201d<\/strong><\/li>\n<li>Pinapatungan namin ang TCC curve ng iyong <em>downstream<\/em> na breaker (ang \u201cSundalo\u201d) sa TCC curve ng <em>nasa itaas<\/em> piyus (ang \u201cHeneral\u201d).<\/li>\n<\/ul>\n<p><strong>Ang Layunin:<\/strong> Dapat naming tiyakin na para sa <em>anuman<\/em> ibinigay na fault (mula 100A hanggang 10,000A), ang curve ng \u201cSundalo\u201d ay <em>ay palaging<\/em> <strong>\u201cnasa ibaba at sa kaliwa\u201d<\/strong> ng curve ng \u201cHeneral\u201d. Dapat walang <em>white space<\/em> kung saan sila nag-o-overlap.<\/p>\n<p>Ito ay isang <em>ginagarantiya<\/em> na ang aming \u201cSundalo\u201d (ang iyong VIOX MCCB) ay <em>ay palaging<\/em> mananalo sa \u201ckarera\u201d at maglalaman ng \u201clabanan\u201d <em>bago pa man*<\/em> marinig ng \u201cHeneral\u201d (ang utility fuse) ang putok ng baril.<\/p>\n<hr \/>\n<h2>Konklusyon: Sa Proteksyon, ang \u201cHierarchy\u201d ay \u201cKaligtasan\u201d<\/h2>\n<p>Ikaw <em>Huwag<\/em> gusto mo ng isang <strong>\u201cPatas na Laban.\u201d<\/strong> Gusto mo ng isang <strong>\u201cHierarchy.\u201d<\/strong><\/p>\n<p><strong>\u201cAng \u201dSelectivity\u201d<\/strong> ay ang sining ng pagtiyak na ang iyong mga \u201cSundalo\u201d (ang iyong mga indibidwal na breaker) ay lutasin ang problema <em>bago pa man<\/em> mapilitang kumilos ang mga \u201cHeneral\u201d (ang iyong pangunahing breaker o ang utility).<\/p>\n<p>Ito ang naghihiwalay sa isang \u201cpropesyonal\u201d na panel mula sa isang \u201cbaguhan\u201d na panel.<\/p>\n<p>Ang mga baguhan ay humuhula (80A vs. 100A). Ang mga Pro ay <em>nagkalkula<\/em>.<\/p>\n<p>Nagbibigay ang VIOX ng buong data ng TCC curve para sa lahat ng aming MCCB at ACB, na nagbibigay-daan sa iyo upang magdisenyo ng isang tunay na <em>selective<\/em> at <em>ligtas<\/em> na sistema. Huwag magdulot ng isang \u201cNakakahiyang Tawag.\u201d<\/p>\n<p><strong>Magdisenyo nang may katiyakan. I-browse ang aming VIOX MCCB at kunin ang data ng TCC na kailangan mo.<\/strong><\/p>\n<hr \/>\n<h3>Tala sa Teknikal na Katumpakan<\/h3>\n<pre><code>**Mga Pamantayan at Sanggunian na Ginagamit** <a href=\"https:\/\/test.viox.com\/tl\/mcb\/\">Mga MCB<\/a> (Miniature Circuit Breakers, IEC 60898), MCCBs (Moulded Case Circuit Breakers, IEC 60947-2), at ACBs (Air Circuit Breakers, IEC 60947-2) at ang kanilang mga aplikasyon ay tama.\n<\/code><\/pre>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>An apprentice engineer asks, &#8220;My utility supply is 100A. Should my factory&#8217;s main breaker also be 100A?&#8221; First, let&#8217;s gently correct the terminology, as it reveals the &#8220;Master-level&#8221; secret. A factory main isn&#8217;t an &#8220;MCB&#8221; (a Miniature Circuit Breaker, the &#8220;household&#8221; kind). It&#8217;s an &#8220;MCCB&#8220; (a Moulded Case Circuit Breaker) or an &#8220;ACB&#8220; (an Air [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":19996,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-19987","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/test.viox.com\/tl\/wp-json\/wp\/v2\/posts\/19987","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/test.viox.com\/tl\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/test.viox.com\/tl\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/test.viox.com\/tl\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/test.viox.com\/tl\/wp-json\/wp\/v2\/comments?post=19987"}],"version-history":[{"count":4,"href":"https:\/\/test.viox.com\/tl\/wp-json\/wp\/v2\/posts\/19987\/revisions"}],"predecessor-version":[{"id":19995,"href":"https:\/\/test.viox.com\/tl\/wp-json\/wp\/v2\/posts\/19987\/revisions\/19995"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/test.viox.com\/tl\/wp-json\/wp\/v2\/media\/19996"}],"wp:attachment":[{"href":"https:\/\/test.viox.com\/tl\/wp-json\/wp\/v2\/media?parent=19987"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/test.viox.com\/tl\/wp-json\/wp\/v2\/categories?post=19987"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/test.viox.com\/tl\/wp-json\/wp\/v2\/tags?post=19987"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}