{"id":706,"date":"2026-09-06T01:11:26","date_gmt":"2026-09-06T01:11:26","guid":{"rendered":"https:\/\/ritoks.com\/?p=706"},"modified":"2026-10-01T09:19:46","modified_gmt":"2026-10-01T09:19:46","slug":"6ka-vs-10ka-mcb-breaking-capacity","status":"publish","type":"post","link":"https:\/\/ritoks.com\/cs\/6ka-vs-10ka-mcb-breaking-capacity\/","title":{"rendered":"6 kA vs. 10 kA MCB: Jak rozum\u011bt hodnot\u00e1m vyp\u00ednac\u00edho v\u00fdkonu"},"content":{"rendered":"<div class=\"wp-block-group alignfull has-ast-global-color-5-color has-ast-global-color-2-background-color has-text-color has-background is-layout-constrained wp-container-core-group-is-layout-a2d0cf3a wp-block-group-is-layout-constrained\" style=\"padding-top:64px;padding-right:24px;padding-bottom:64px;padding-left:24px\">\n\n<h1 class=\"wp-block-heading\">6 kA vs. 10 kA MCB: Jak rozum\u011bt hodnot\u00e1m vyp\u00ednac\u00edho v\u00fdkonu<\/h1>\n\n<figure data-spectra-id=\"spectra-0f5ea75f-3ea6-41a6-90c9-71ca89cf16db\" class=\"wp-block-image aligncenter size-full has-custom-border\" ><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/ac-mcb-industrial-workbench.jpg\" alt=\"Typick\u00e9 miniaturn\u00ed jisti\u010de st\u0159\u00eddav\u00e9ho proudu na pr\u016fmyslov\u00e9m elektromont\u00e1\u017en\u00edm stole\" class=\"wp-image-709\"  width=\"1672\" height=\"941\" srcset=\"https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/ac-mcb-industrial-workbench.jpg 1672w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/ac-mcb-industrial-workbench-600x338.jpg 600w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/ac-mcb-industrial-workbench-300x169.jpg 300w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/ac-mcb-industrial-workbench-1024x576.jpg 1024w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/ac-mcb-industrial-workbench-768x432.jpg 768w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/ac-mcb-industrial-workbench-1536x864.jpg 1536w\" sizes=\"auto, (max-width: 1672px) 100vw, 1672px\" \/><figcaption class=\"wp-element-caption\">Uk\u00e1zky typick\u00fdch form\u00e1t\u016f st\u0159\u00eddav\u00fdch proudov\u00fdch jisti\u010d\u016f (AC MCB) v prost\u0159ed\u00ed pr\u016fmyslov\u00e9ho elektrick\u00e9ho pracovn\u00edho stolu.<\/figcaption><\/figure>\n\n<p class=\"wp-block-paragraph\">P\u0159i porovn\u00e1v\u00e1n\u00ed miniaturn\u00edch jisti\u010d\u016f se hodnoty 6 kA a 10 kA vztahuj\u00ed k jmenovit\u00e9mu vyp\u00ednac\u00edmu v\u00fdkonu p\u0159i zkratu.<\/p>\n\n<p class=\"wp-block-paragraph\">Neuv\u00e1d\u011bj\u00ed jmenovit\u00fd proud jisti\u010de, po\u010det p\u00f3l\u016f ani vyp\u00ednac\u00ed charakteristiku.<\/p>\n<\/div>\n\n\n<div class=\"wp-block-group alignfull is-layout-constrained wp-container-core-group-is-layout-105ba9aa wp-block-group-is-layout-constrained\" style=\"padding-top:64px;padding-right:24px;padding-bottom:64px;padding-left:24px\">\n\n<p class=\"wp-block-paragraph\">Jisti\u010d s jmenovit\u00fdm proudem 6 kA i jisti\u010d s jmenovit\u00fdm proudem 10 kA mohou m\u00edt oba jmenovit\u00fd proud 32 A, stejn\u00e9 uspo\u0159\u00e1d\u00e1n\u00ed p\u00f3l\u016f a stejnou vyp\u00ednac\u00ed charakteristiku typu B nebo C. Rozd\u00edl spo\u010d\u00edv\u00e1 v \u00farovni p\u0159edpokl\u00e1dan\u00e9ho zkratov\u00e9ho proudu, na jeho\u017e p\u0159eru\u0161en\u00ed je jisti\u010d dimenzov\u00e1n podle p\u0159\u00edslu\u0161n\u00e9 normy a za stanoven\u00fdch podm\u00ednek.<\/p>\n\n<p class=\"wp-block-paragraph\">Nejd\u016fle\u017eit\u011bj\u0161\u00ed bod je jednoduch\u00fd:<\/p>\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong>Hodnota 10 kA p\u0159edstavuje vy\u0161\u0161\u00ed jmenovitou vyp\u00ednac\u00ed schopnost ne\u017e 6 kA za stejn\u00fdch jmenovit\u00fdch podm\u00ednek, co\u017e v\u0161ak neznamen\u00e1, \u017ee 10 kA je automaticky spr\u00e1vnou volbou pro ka\u017edou instalaci.<\/strong><\/p>\n<\/blockquote>\n\n<p class=\"wp-block-paragraph\">Po\u017eadovanou vyp\u00ednac\u00ed schopnost je t\u0159eba zohlednit s ohledem na p\u0159edpokl\u00e1dan\u00fd zkratov\u00fd proud v m\u00edst\u011b, kde bude jisti\u010d nainstalov\u00e1n. <a href=\"https:\/\/assets.sc.hager.com\/ie\/-\/media\/project\/hagerdeep\/republic-of-ireland\/hager\/republic-of-ireland\/documents\/residential-distibution-catalogue_ie.pdf?la=en-ie\" target=\"_blank\" rel=\"noopener\">Technick\u00e9 pokyny spole\u010dnosti Hager pro jisti\u010de podle normy IEC\/EN 60898-1<\/a> uv\u00e1d\u00ed, \u017ee jmenovit\u00e1 zkratov\u00e1 odolnost Icn by m\u011bla b\u00fdt rovna p\u0159edpokl\u00e1dan\u00e9mu zkratov\u00e9mu proudu v m\u00edst\u011b pou\u017eit\u00ed nebo v\u011bt\u0161\u00ed ne\u017e tento proud.<\/p>\n\n<h2 id=\"in-this-guide\" class=\"wp-block-heading\">V t\u00e9to p\u0159\u00edru\u010dce<\/h2>\n\n<ul class=\"wp-block-list\">\n\n<li><a href=\"#quick-answer\">Stru\u010dn\u00e1 odpov\u011b\u010f: Jisti\u010d 6 kA vs. 10 kA<\/a><\/li>\n\n\n<li><a href=\"#breaking-capacity\">Co znamen\u00e1 pojistn\u00e1 schopnost jisti\u010de (MCB)<\/a><\/li>\n\n\n<li><a href=\"#prospective-current\">P\u0159edpokl\u00e1dan\u00fd zkratov\u00fd proud<\/a><\/li>\n\n\n<li><a href=\"#icn-ics\">Kontext ICN, ICS a standard\u016f<\/a><\/li>\n\n\n<li><a href=\"#what-changes\">Jak\u00e9 jsou rozd\u00edly mezi 6 kA a 10 kA<\/a><\/li>\n\n\n<li><a href=\"#ritoks-options\">Aktu\u00e1ln\u00ed mo\u017enosti RITOKS<\/a><\/li>\n\n\n<li><a href=\"#selection-process\">Proces ov\u011b\u0159ov\u00e1n\u00ed<\/a><\/li>\n\n\n<li><a href=\"#common-mistakes\">\u010cast\u00e9 chyby<\/a><\/li>\n\n\n<li><a href=\"#frequently-asked-questions\">\u010casto kladen\u00e9 ot\u00e1zky<\/a><\/li>\n\n<\/ul>\n\n<h2 id=\"quick-answer\" class=\"wp-block-heading\">Stru\u010dn\u00e1 odpov\u011b\u010f: Jisti\u010d 6 kA vs. 10 kA<\/h2>\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th>Hodnocen\u00ed<\/th><th>Co to znamen\u00e1<\/th><th>Co v\u00e1m ne\u0159ekne<\/th><\/tr><\/thead><tbody><tr><td>6 kA<\/td><td>Uveden\u00e1 jmenovit\u00e1 zkratov\u00e1 vyp\u00ednac\u00ed schopnost 6 kA za stanoven\u00fdch podm\u00ednek<\/td><td>Jmenovit\u00fd proud, vyp\u00ednac\u00ed charakteristika, po\u010det p\u00f3l\u016f nebo vhodnost pro automatick\u00e9 pou\u017eit\u00ed<\/td><\/tr><tr><td>10 kA<\/td><td>Vy\u0161\u0161\u00ed ud\u00e1van\u00e1 jmenovit\u00e1 vyp\u00ednac\u00ed schopnost p\u0159i zkratu, a to 10 kA za ekvivalentn\u00edch podm\u00ednek<\/td><td>\u017de jisti\u010d je obecn\u011b bezpe\u010dn\u011bj\u0161\u00ed, lep\u0161\u00ed nebo nezbytn\u00fd pro ka\u017ed\u00fd projekt<\/td><\/tr><\/tbody><\/table><\/figure>\n\n<p class=\"wp-block-paragraph\">Toto srovn\u00e1n\u00ed m\u00e1 smysl pouze tehdy, jsou-li zn\u00e1my tak\u00e9 p\u0159\u00edslu\u0161n\u00e1 norma, nap\u011bt\u00ed, p\u0159esn\u00fd model jisti\u010de a jeho typov\u00e9 ozna\u010den\u00ed.<\/p>\n\n<p class=\"wp-block-paragraph\">Jedna hodnota v kA by nem\u011bla b\u00fdt pova\u017eov\u00e1na za \u00faplnou specifikaci jisti\u010de.<\/p>\n\n<h2 id=\"breaking-capacity\" class=\"wp-block-heading\">Co znamen\u00e1 vyp\u00ednac\u00ed schopnost jisti\u010de (MCB)?<\/h2>\n\n<p class=\"wp-block-paragraph\">Zkrat m\u016f\u017ee vyvolat proud, kter\u00fd v\u00fdrazn\u011b p\u0159evy\u0161uje b\u011b\u017en\u00fd provozn\u00ed proud obvodu.<\/p>\n\n<p class=\"wp-block-paragraph\">Jisti\u010d proto mus\u00ed um\u011bt v\u00edce ne\u017e jen chr\u00e1nit p\u0159ed b\u011b\u017en\u00fdmi p\u0159et\u00ed\u017een\u00edmi. Mus\u00ed b\u00fdt tak\u00e9 schopen p\u0159eru\u0161it zkratov\u00fd proud v mez\u00edch, pro kter\u00e9 byl navr\u017een a testov\u00e1n.<\/p>\n\n<p class=\"wp-block-paragraph\">U miniaturn\u00edch jisti\u010d\u016f podle normy IEC\/EN 60898-1, <a href=\"https:\/\/library.e.abb.com\/public\/4009e91864554accb8c325cb552f18e0\/9AKK108468A3912_en_9AKK108468A3912_B01_D_B01%20Electrical%20installation%20solutions%20for%20buildings_part%20B01%20MCBs%20_EN_%20%28PDF%29.pdf\" target=\"_blank\" rel=\"noopener\">Technick\u00e9 \u00fadaje spole\u010dnosti ABB k miniaturn\u00edm jisti\u010d\u016fm<\/a> definuje Icn jako jmenovitou zkratovou schopnost, kterou v\u00fdrobce p\u0159i\u0159adil jisti\u010di na z\u00e1klad\u011b stanoven\u00e9ho zku\u0161ebn\u00edho postupu. Tato hodnota se vztahuje k p\u0159edpokl\u00e1dan\u00e9mu zkratov\u00e9mu proudu.<\/p>\n\n<p class=\"wp-block-paragraph\">Proto se p\u0159et\u00ed\u017eovac\u00ed schopnost li\u0161\u00ed od jmenovit\u00e9ho proudu. <strong>6 A a 6 kA nejsou stejn\u00e9 jmenovit\u00e9 hodnoty:<\/strong> 6 A je hodnota jmenovit\u00e9ho proudu; 6 kA (6 000 A) je hodnota vyp\u00ednac\u00ed schopnosti p\u0159i zkratu za stanoven\u00fdch jmenovit\u00fdch podm\u00ednek. P\u0159i porovn\u00e1v\u00e1n\u00ed jisti\u010d\u016f MCB zkontrolujte ob\u011b hodnoty samostatn\u011b.<\/p>\n\n<p class=\"wp-block-paragraph\">Nap\u0159\u00edklad:<\/p>\n\n<ul class=\"wp-block-list\">\n\n<li><strong>32A<\/strong> uv\u00e1d\u00ed jmenovit\u00fd proud.<\/li>\n\n\n<li><strong>K\u0159ivka C<\/strong> popisuje charakteristiku sp\u00edn\u00e1n\u00ed.<\/li>\n\n\n<li><strong>10 kA Icn<\/strong> uv\u00e1d\u00ed jmenovitou schopnost vypnut\u00ed p\u0159i zkratu.<\/li>\n\n<\/ul>\n\n<p class=\"wp-block-paragraph\">Odpov\u00eddaj\u00ed na r\u016fzn\u00e9 ot\u00e1zky.<\/p>\n\n<p class=\"wp-block-paragraph\">\u0160ir\u0161\u00ed postup v\u00fdb\u011bru, kter\u00fd zohled\u0148uje proudy, p\u00f3ly, vyp\u00ednac\u00ed charakteristiku a vyp\u00ednac\u00ed schopnost jako celek, najdete v <a href=\"https:\/\/ritoks.com\/cs\/ac-mcb-selection-guide\/\">Pr\u016fvodce v\u00fdb\u011brem jisti\u010d\u016f st\u0159\u00eddav\u00e9ho proudu (AC MCB)<\/a>.<\/p>\n\n<h2 id=\"prospective-current\" class=\"wp-block-heading\">Co je to p\u0159edpokl\u00e1dan\u00fd zkratov\u00fd proud?<\/h2>\n\n<p class=\"wp-block-paragraph\">P\u0159edpokl\u00e1dan\u00fd zkratov\u00fd proud je proud, kter\u00fd by mohl prot\u00e9kat v ur\u010dit\u00e9m bod\u011b elektrick\u00e9ho syst\u00e9mu, pokud by za stanoven\u00fdch podm\u00ednek do\u0161lo ke zkratu.<\/p>\n\n<p class=\"wp-block-paragraph\">Nejedn\u00e1 se pouze o n\u00e1sobek b\u011b\u017en\u00e9ho zat\u011b\u017eovac\u00edho proudu a vhodn\u00e9ho koeficientu.<\/p>\n\n<p class=\"wp-block-paragraph\">Dostupn\u00fd poruchov\u00fd proud z\u00e1vis\u00ed na elektrick\u00e9 soustav\u011b nap\u00e1jej\u00edc\u00ed danou instalaci, v\u010detn\u011b faktor\u016f, jako jsou vlastnosti zdroje a impedance obvodu.<\/p>\n\n<p class=\"wp-block-paragraph\">P\u0159i v\u00fdb\u011bru jisti\u010de plat\u00ed d\u016fle\u017eit\u00e1 obecn\u00e1 z\u00e1sada, \u017ee vyp\u00ednac\u00ed schopnost ochrann\u00e9ho za\u0159\u00edzen\u00ed mus\u00ed b\u00fdt dostate\u010dn\u00e1 pro p\u0159edpokl\u00e1dan\u00fd zkratov\u00fd proud v m\u00edst\u011b jeho instalace. Spole\u010dnost ABB rovn\u011b\u017e vysv\u011btluje, \u017ee ochrann\u00e1 za\u0159\u00edzen\u00ed proti zkrat\u016fm je t\u0159eba volit s ohledem na maxim\u00e1ln\u00ed p\u0159edpokl\u00e1dan\u00fd zkratov\u00fd proud v m\u00edst\u011b p\u0159ipojen\u00ed.<\/p>\n\n<p class=\"wp-block-paragraph\">Tento \u010dl\u00e1nek neuv\u00e1d\u00ed metodu v\u00fdpo\u010dtu poruchov\u00e9ho proudu.<\/p>\n\n<p class=\"wp-block-paragraph\">Tento v\u00fdpo\u010det spad\u00e1 do oblasti elektrick\u00e9ho n\u00e1vrhu dan\u00e9ho syst\u00e9mu.<\/p>\n\n<h2 id=\"no-building-mapping\" class=\"wp-block-heading\">Pro\u010d nelze na z\u00e1klad\u011b samotn\u00e9ho n\u00e1zvu z\u00e1t\u011b\u017ee vybrat hodnoty 6 kA a 10 kA<\/h2>\n\n<p class=\"wp-block-paragraph\">M\u016f\u017ee b\u00fdt l\u00e1kav\u00e9 pou\u017e\u00edvat zkratky, jako nap\u0159\u00edklad:<\/p>\n\n<ul class=\"wp-block-list\">\n\n<li>6 kA pro dom\u00e1cnosti<\/li>\n\n\n<li>10 kA pro komer\u010dn\u00ed pou\u017eit\u00ed<\/li>\n\n\n<li>10 kA pro pr\u016fmyslov\u00e9 \u00fa\u010dely<\/li>\n\n<\/ul>\n\n<p class=\"wp-block-paragraph\">Tyto v\u00fdroky jsou p\u0159\u00edli\u0161 obecn\u00e9 na to, aby mohly slou\u017eit jako spolehliv\u00e1 krit\u00e9ria v\u00fdb\u011bru.<\/p>\n\n<p class=\"wp-block-paragraph\">Po\u017eadovan\u00e1 vyp\u00ednac\u00ed schopnost vypl\u00fdv\u00e1 z p\u0159edpokl\u00e1dan\u00fdch poruchov\u00fdch stav\u016f v m\u00edst\u011b instalace a z p\u0159\u00edslu\u0161n\u00fdch projektov\u00fdch po\u017eadavk\u016f \u2013 nikoli pouze z toho, zda se jedn\u00e1 o obytnou, komer\u010dn\u00ed \u010di pr\u016fmyslovou budovu.<\/p>\n\n<p class=\"wp-block-paragraph\">Dv\u011b za\u0159\u00edzen\u00ed s podobn\u00fdm zat\u00ed\u017een\u00edm mohou m\u00edt odli\u0161n\u00e9 p\u0159edpokl\u00e1dan\u00e9 zkratov\u00e9 proudy, proto\u017ee se li\u0161\u00ed jejich nap\u00e1jec\u00ed syst\u00e9my.<\/p>\n\n<p class=\"wp-block-paragraph\">Stejn\u011b tak nemus\u00ed m\u00edt r\u016fzn\u00e9 body v r\u00e1mci t\u00e9ho\u017e distribu\u010dn\u00edho syst\u00e9mu identick\u00e9 podm\u00ednky poruchov\u00e9ho proudu.<\/p>\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong>Samotn\u00e1 kategorie pou\u017eit\u00ed neur\u010duje po\u017eadovanou jmenovitou hodnotu v kA.<\/strong><\/p>\n<\/blockquote>\n\n<h2 id=\"icn-ics\" class=\"wp-block-heading\">Co znamen\u00e1 zkratka Icn?<\/h2>\n\n<p class=\"wp-block-paragraph\">U jisti\u010d\u016f podle normy IEC\/EN 60898-1 ozna\u010duje Icn jmenovitou zkratovou odolnost.<\/p>\n\n<p class=\"wp-block-paragraph\">Spole\u010dnost ABB definuje Icn jako schopnost jisti\u010de p\u0159eru\u0161it zkrat podle zku\u0161ebn\u00edho postupu stanoven\u00e9ho v norm\u011b. Spole\u010dnost Hager uv\u00e1d\u00ed, \u017ee hodnota Icn jisti\u010de by m\u011bla b\u00fdt rovna nebo v\u011bt\u0161\u00ed ne\u017e p\u0159edpokl\u00e1dan\u00fd zkratov\u00fd proud v m\u00edst\u011b pou\u017eit\u00ed.<\/p>\n\n<p class=\"wp-block-paragraph\">Pokud je tedy produkt v\u00fdslovn\u011b zve\u0159ejn\u011bn jako:<\/p>\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong>10 kA Icn<\/strong><\/p>\n<\/blockquote>\n\n<p class=\"wp-block-paragraph\">toto tvrzen\u00ed je p\u0159esn\u011bj\u0161\u00ed ne\u017e pouh\u00e9 konstatov\u00e1n\u00ed:<\/p>\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong>Jisti\u010d 10 kA<\/strong><\/p>\n<\/blockquote>\n\n<p class=\"wp-block-paragraph\">proto\u017ee ur\u010duje typ jmenovit\u00e9ho zkratov\u00e9ho proudu, na kter\u00fd se odkazuje.<\/p>\n\n<p class=\"wp-block-paragraph\">Standard a nap\u011bt\u00ed v\u0161ak st\u00e1le hraj\u00ed d\u016fle\u017eitou roli.<\/p>\n\n<h2 id=\"ics\" class=\"wp-block-heading\">Co znamen\u00e1 zkratka Ics?<\/h2>\n\n<p class=\"wp-block-paragraph\">Ics ozna\u010duje vyp\u00ednac\u00ed schopnost za\u0159\u00edzen\u00ed p\u0159i zkratu.<\/p>\n\n<p class=\"wp-block-paragraph\">Podle normy IEC\/EN 60898-1 jsou pojmy Icn a Ics sice p\u0159\u00edbuzn\u00e9, ale nejsou toto\u017en\u00e9. Spole\u010dnost ABB vysv\u011btluje, \u017ee norma pou\u017e\u00edv\u00e1 r\u016fzn\u00e9 p\u0159edepsan\u00e9 zku\u0161ebn\u00ed sekvence pro jmenovitou zkratovou odolnost a provozn\u00ed zkratovou odolnost.<\/p>\n\n<p class=\"wp-block-paragraph\">Toto rozli\u0161en\u00ed je d\u016fle\u017eit\u00e9 p\u0159i \u010dten\u00ed \u00fadaj\u016f o produktu.<\/p>\n\n<p class=\"wp-block-paragraph\">Nap\u0159\u00edklad aktu\u00e1ln\u00ed data RITOKS pro RTSXD01 a RTSXD04 uv\u00e1d\u011bj\u00ed:<\/p>\n\n<ul class=\"wp-block-list\">\n\n<li>Icn: 10 kA<\/li>\n\n\n<li>Ics: 7,5 kA<\/li>\n\n<\/ul>\n\n<p class=\"wp-block-paragraph\">Tyto \u00fadaje by m\u011bly b\u00fdt zachov\u00e1ny p\u0159esn\u011b tak, jak byly zve\u0159ejn\u011bny.<\/p>\n\n<p class=\"wp-block-paragraph\">Nem\u011bly by b\u00fdt zjednodu\u0161ov\u00e1ny tak, aby se z toho dalo vyvodit, \u017ee ob\u011b hodnoty znamenaj\u00ed tot\u00e9\u017e.<\/p>\n\n<p class=\"wp-block-paragraph\">Stejn\u011b tak v p\u0159\u00edpad\u011b, \u017ee jin\u00fd v\u00fdrobek spole\u010dnosti RITOKS uv\u00e1d\u00ed pouze hodnotu 6 kA, ani\u017e by specifikoval Icn nebo Ics, nem\u011bl by tento \u010dl\u00e1nek chyb\u011bj\u00edc\u00ed ozna\u010den\u00ed dom\u00fd\u0161let.<\/p>\n\n<h2 id=\"rating-designations\" class=\"wp-block-heading\">Zkratky ICN, ICS a ICU nejsou zam\u011bniteln\u00e9<\/h2>\n\n<p class=\"wp-block-paragraph\">Dal\u0161\u00edm \u010dast\u00fdm zdrojem nejasnost\u00ed je srovn\u00e1v\u00e1n\u00ed hodnot zkratov\u00e9ho proudu p\u0159evzat\u00fdch z r\u016fzn\u00fdch norem, jako by se jednalo o stejn\u00e9 jmenovit\u00e9 hodnoty.<\/p>\n\n<p class=\"wp-block-paragraph\">Norma IEC\/EN 60898-1 b\u011b\u017en\u011b pou\u017e\u00edv\u00e1 pro miniaturn\u00ed jisti\u010de terminologii Icn.<\/p>\n\n<p class=\"wp-block-paragraph\">Norma IEC\/EN 60947-2 pou\u017e\u00edv\u00e1 pojmy jako Icu, jmenovit\u00e1 mezn\u00ed vyp\u00ednac\u00ed schopnost p\u0159i zkratu, a Ics, jmenovit\u00e1 provozn\u00ed vyp\u00ednac\u00ed schopnost p\u0159i zkratu.<\/p>\n\n<p class=\"wp-block-paragraph\">Spole\u010dnost ABB upozor\u0148uje, \u017ee tyto dv\u011b normy maj\u00ed odli\u0161n\u00fd rozsah p\u016fsobnosti a odli\u0161n\u00e9 definice, a proto mus\u00ed in\u017een\u00fd\u0159i ur\u010dit, kter\u00e1 definice zkratov\u00e9 kapacity se na konkr\u00e9tn\u00ed konstrukci vztahuje.<\/p>\n\n<p class=\"wp-block-paragraph\">A <a href=\"https:\/\/eshop.se.com\/sg\/miniature-circuit-breaker-mcb-acti9-ic60n-4p-20a-b-curve-6000a-iec-en-60898-1-10ka-iec-en-60947-2-a9f73420.html\" target=\"_blank\" rel=\"noopener\">Str\u00e1nka produktu MCB spole\u010dnosti Schneider Electric<\/a> uv\u00e1d\u00ed u\u017eite\u010dn\u00fd p\u0159\u00edklad z praxe: stejn\u00e9 za\u0159\u00edzen\u00ed m\u016f\u017ee uv\u00e1d\u011bt hodnotu Icn 6000 A podle normy IEC\/EN 60898-1 a z\u00e1rove\u0148 uv\u00e1d\u011bt odli\u0161nou hodnotu vyp\u00ednac\u00edho v\u00fdkonu podle normy IEC\/EN 60947-2, a to v z\u00e1vislosti na nap\u011bt\u00ed a norm\u011b.<\/p>\n\n<p class=\"wp-block-paragraph\">To neznamen\u00e1, \u017ee jedno z \u010d\u00edsel je nespr\u00e1vn\u00e9.<\/p>\n\n<p class=\"wp-block-paragraph\">To znamen\u00e1, \u017ee kontext hodnocen\u00ed je jin\u00fd.<\/p>\n\n<h2 id=\"what-changes\" class=\"wp-block-heading\">6 kA vs. 10 kA: Co se vlastn\u011b zm\u011bn\u00ed?<\/h2>\n\n<p class=\"wp-block-paragraph\">P\u0159i srovn\u00e1n\u00ed dvou jmenovit\u00fdch hodnot jisti\u010d\u016f za stejn\u00fdch podm\u00ednek p\u0159edstavuje hodnota 10 kA vy\u0161\u0161\u00ed jmenovitou zkratovou vyp\u00ednac\u00ed schopnost ne\u017e hodnota 6 kA.<\/p>\n\n<p class=\"wp-block-paragraph\">Z praktick\u00e9ho hlediska znamen\u00e1 zve\u0159ejn\u011bn\u00fd jmenovit\u00fd v\u00fdkon, \u017ee jisti\u010di byla p\u0159i stanoven\u00fdch provozn\u00edch podm\u00ednk\u00e1ch p\u0159i\u0159azena vy\u0161\u0161\u00ed \u00farove\u0148 schopnosti p\u0159eru\u0161it zkrat.<\/p>\n\n<p class=\"wp-block-paragraph\">Co se automaticky nem\u011bn\u00ed?<\/p>\n\n<ul class=\"wp-block-list\">\n\n<li>vy\u0161\u0161\u00ed jmenovit\u00fd proud<\/li>\n\n\n<li>dal\u0161\u00ed sloupy<\/li>\n\n\n<li>odli\u0161n\u00e1 charakteristika j\u00edzdy B\/C\/D<\/li>\n\n\n<li>lep\u0161\u00ed ochrana proti p\u0159et\u00ed\u017een\u00ed<\/li>\n\n\n<li>vy\u0161\u0161\u00ed kvalita v\u00fdrobk\u016f<\/li>\n\n\n<li>del\u0161\u00ed \u017eivotnost<\/li>\n\n\n<li>lep\u0161\u00ed selektivita<\/li>\n\n\n<li>vhodnost pro konkr\u00e9tn\u00ed odv\u011btv\u00ed<\/li>\n\n<\/ul>\n\n<p class=\"wp-block-paragraph\">Tyto parametry je t\u0159eba zkontrolovat samostatn\u011b.<\/p>\n\n<figure data-spectra-id=\"spectra-a64ce903-a67f-48c5-b411-68a4a5e1e754\" class=\"wp-block-image aligncenter size-full has-custom-border\" ><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/6ka-vs-10ka-mcb-comparison.jpg\" alt=\"Koncep\u010dn\u00ed srovn\u00e1n\u00ed jmenovit\u00fdch vyp\u00ednac\u00edch schopnost\u00ed jisti\u010d\u016f MCB 6 kA a 10 kA\" class=\"wp-image-710\"  width=\"1672\" height=\"941\" srcset=\"https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/6ka-vs-10ka-mcb-comparison.jpg 1672w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/6ka-vs-10ka-mcb-comparison-600x338.jpg 600w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/6ka-vs-10ka-mcb-comparison-300x169.jpg 300w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/6ka-vs-10ka-mcb-comparison-1024x576.jpg 1024w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/6ka-vs-10ka-mcb-comparison-768x432.jpg 768w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/6ka-vs-10ka-mcb-comparison-1536x864.jpg 1536w\" sizes=\"auto, (max-width: 1672px) 100vw, 1672px\" \/><figcaption class=\"wp-element-caption\">Teoretick\u00e9 srovn\u00e1n\u00ed 6 kA a 10 kA. Odpojovac\u00ed schopnost je nutn\u00e9 ov\u011b\u0159it s ohledem na p\u0159\u00edslu\u0161nou normu, nap\u011bt\u00ed a konkr\u00e9tn\u00ed model.<\/figcaption><\/figure>\n\n<h3 class=\"wp-block-heading\">Jisti\u010d s proudem 6 kA nen\u00ed jisti\u010dem \u201cni\u017e\u0161\u00ed kvality\u201d<\/h3>\n\n<p class=\"wp-block-paragraph\">Jisti\u010d s jmenovit\u00fdm proudem 6 kA nen\u00ed automaticky hor\u0161\u00ed ne\u017e jisti\u010d s jmenovit\u00fdm proudem 10 kA.<\/p>\n\n<p class=\"wp-block-paragraph\">Pokud instala\u010dn\u00ed po\u017eadavky stanovuj\u00ed vyp\u00ednac\u00ed schopnost, kterou spl\u0148uje spr\u00e1vn\u011b dimenzovan\u00e9 za\u0159\u00edzen\u00ed s vyp\u00ednac\u00ed schopnost\u00ed 6 kA, nem\u011bla by b\u00fdt hodnota 10 kA sama o sob\u011b pova\u017eov\u00e1na za zlep\u0161en\u00ed kvality.<\/p>\n\n<p class=\"wp-block-paragraph\">Hodnota v kA vyjad\u0159uje ur\u010ditou elektrickou kapacitu.<\/p>\n\n<p class=\"wp-block-paragraph\">Nejedn\u00e1 se o t\u0159\u00eddu v\u00fdrobku, jako nap\u0159\u00edklad:<\/p>\n\n<ul class=\"wp-block-list\">\n\n<li>standardn\u00ed<\/li>\n\n\n<li>pr\u00e9miov\u00fd<\/li>\n\n\n<li>profesion\u00e1ln\u00ed<\/li>\n\n<\/ul>\n\n<p class=\"wp-block-paragraph\">Stejn\u011b tak by se marketingov\u00e9 n\u00e1zvy jako \u201cEconomic\u201d nebo \u201cPro\u201d nem\u011bly pou\u017e\u00edvat jako n\u00e1hrada za ov\u011b\u0159en\u00e9 technick\u00e9 specifikace.<\/p>\n\n<h3 class=\"wp-block-heading\">10 kA nemus\u00ed b\u00fdt automaticky tou lep\u0161\u00ed volbou<\/h3>\n\n<p class=\"wp-block-paragraph\">Vy\u0161\u0161\u00ed ud\u00e1van\u00e1 vyp\u00ednac\u00ed schopnost m\u016f\u017ee b\u00fdt nezbytn\u00e1, pokud to vy\u017eaduje p\u0159edpokl\u00e1dan\u00fd poruchov\u00fd proud.<\/p>\n\n<p class=\"wp-block-paragraph\">V\u00fdb\u011br by v\u0161ak nem\u011bl vych\u00e1zet z n\u00e1sleduj\u00edc\u00ed logiky:<\/p>\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong>\u010c\u00edm vy\u0161\u0161\u00ed \u010d\u00edslo, t\u00edm l\u00e9pe.<\/strong><\/p>\n<\/blockquote>\n\n<p class=\"wp-block-paragraph\">Technick\u00e1 ot\u00e1zka zn\u00ed sp\u00ed\u0161e takto:<\/p>\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong>Jak\u00e9 p\u0159edpokl\u00e1dan\u00e9 zkratov\u00e9 proudy a p\u0159\u00edslu\u0161n\u00e9 po\u017eadavky mus\u00ed tento jisti\u010d bezpe\u010dn\u011b zvl\u00e1dnout?<\/strong><\/p>\n<\/blockquote>\n\n<p class=\"wp-block-paragraph\">Jakmile bude tento po\u017eadavek zn\u00e1m, lze sestavit u\u017e\u0161\u00ed v\u00fdb\u011br kompatibiln\u00edch model\u016f jisti\u010d\u016f.<\/p>\n\n<p class=\"wp-block-paragraph\">D\u016fle\u017eit\u00e9 jsou i dal\u0161\u00ed parametry, mezi n\u011b\u017e pat\u0159\u00ed:<\/p>\n\n<ul class=\"wp-block-list\">\n\n<li>jmenovit\u00e9 nap\u011bt\u00ed<\/li>\n\n\n<li>aktu\u00e1ln\u00ed<\/li>\n\n\n<li>sloupy<\/li>\n\n\n<li>pr\u016fb\u011bh k\u0159ivky<\/li>\n\n\n<li>ozna\u010den\u00ed mezn\u00ed nosnosti<\/li>\n\n\n<li>platn\u00e1 norma<\/li>\n\n\n<li>mont\u00e1\u017e<\/li>\n\n\n<li>p\u0159esn\u00e1 varianta produktu<\/li>\n\n<\/ul>\n\n<h2 id=\"ritoks-options\" class=\"wp-block-heading\">Aktu\u00e1ln\u00ed mo\u017enosti nosnosti za\u0159\u00edzen\u00ed RITOKS<\/h2>\n\n<p class=\"wp-block-paragraph\">Aktu\u00e1ln\u00ed zve\u0159ejn\u011bn\u00e9 \u00fadaje o jisti\u010d\u00edch RITOKS AC MCB v <a href=\"https:\/\/ritoks.com\/cs\/product-category\/ac-power-protection\/\">Ochrana nap\u00e1jen\u00ed st\u0159\u00eddav\u00fdm proudem<\/a> a <a href=\"https:\/\/ritoks.com\/cs\/product-category\/ac-power-protection\/miniature-circuit-breakers\/\">Miniaturn\u00ed jisti\u010de (MCB)<\/a> Tato \u0159ada zahrnuje n\u011bkolik r\u016fzn\u00fdch hodnot brzdn\u00e9 s\u00edly.<\/p>\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th>Model RITOKS<\/th><th>Uveden\u00e1 mezn\u00ed kapacita<\/th><th>Pozn\u00e1mky<\/th><\/tr><\/thead><tbody><tr><td>RTSXD01<\/td><td>10 kA Icn \/ 7,5 kA Ics<\/td><td>Zve\u0159ejn\u011bny konkr\u00e9tn\u00ed hodnoty Icn a Ics<\/td><\/tr><tr><td>RTSXD03<\/td><td>6 kA<\/td><td>Ozna\u010den\u00ed Icn\/Ics nebylo zve\u0159ejn\u011bno<\/td><\/tr><tr><td>RTSXD02<\/td><td>6 kA<\/td><td>Ozna\u010den\u00ed Icn\/Ics nebylo zve\u0159ejn\u011bno<\/td><\/tr><tr><td>RTSXD04<\/td><td>10 kA Icn \/ 7,5 kA Ics<\/td><td>Zve\u0159ejn\u011bny konkr\u00e9tn\u00ed hodnoty Icn a Ics<\/td><\/tr><tr><td>RTS-ACM60<\/td><td>typicky 6 kA<\/td><td>Je t\u0159eba potvrdit konkr\u00e9tn\u00ed variantou<\/td><\/tr><tr><td>RTS-AC47<\/td><td>1 kA<\/td><td>Ozna\u010den\u00ed Icn\/Ics nebylo zve\u0159ejn\u011bno<\/td><\/tr><\/tbody><\/table><\/figure>\n\n<p class=\"wp-block-paragraph\">Tato tabulka obsahuje pouze zve\u0159ejn\u011bn\u00e9 informace o modelov\u00fdch \u0159ad\u00e1ch.<\/p>\n\n<p class=\"wp-block-paragraph\">To neprokazuje:<\/p>\n\n<ul class=\"wp-block-list\">\n\n<li>p\u0159edpokl\u00e1dan\u00fd poruchov\u00fd proud v instalaci odb\u011bratele<\/li>\n\n\n<li>zpr\u00e1va o zkou\u0161ce na zkrat specifick\u00e1 pro dan\u00fd model<\/li>\n\n\n<li>sou\u010dinnost s jin\u00fdm ochrann\u00fdm za\u0159\u00edzen\u00edm<\/li>\n\n\n<li>SCCR u kompletn\u00edho panelu<\/li>\n\n\n<li>univerz\u00e1ln\u00ed pou\u017eitelnost pro jak\u00fdkoli typ aplikace<\/li>\n\n<\/ul>\n\n<h3 class=\"wp-block-heading\">Kter\u00e9 sou\u010dasn\u00e9 modely RITOKS uv\u00e1d\u011bj\u00ed hodnotu 10 kA?<\/h3>\n\n<p class=\"wp-block-paragraph\">Dv\u011b v sou\u010dasn\u00e9 dob\u011b uveden\u00e9 \u0159ady proudov\u00fdch jisti\u010d\u016f RITOKS AC MCB v\u00fdslovn\u011b uv\u00e1d\u011bj\u00ed hodnoty Icn 10 kA \/ Ics 7,5 kA:<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>RTSXD01<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">Tento <a href=\"https:\/\/ritoks.com\/cs\/products\/miniature-circuit-breaker-63a-10ka\/\">\u0158ada RTSXD01<\/a> zve\u0159ej\u0148uje:<\/p>\n\n<ul class=\"wp-block-list\">\n\n<li>230\/400 V st\u0159\u00eddav\u00e9ho proudu<\/li>\n\n\n<li>1\u201363A<\/li>\n\n\n<li>r\u016fzn\u00e9 konfigurace p\u00f3l\u016f<\/li>\n\n\n<li>Dostupnost k\u0159ivek B\/C\/D<\/li>\n\n\n<li>10 kA Icn<\/li>\n\n\n<li>7,5 kA Ics<\/li>\n\n<\/ul>\n\n<p class=\"wp-block-paragraph\"><strong>RTSXD04<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">Tento <a href=\"https:\/\/ritoks.com\/cs\/products\/miniature-circuit-breaker-63a-10ka-pro\/\">\u0158ada RTSXD04<\/a> vyd\u00e1v\u00e1 tak\u00e9:<\/p>\n\n<ul class=\"wp-block-list\">\n\n<li>230\/400 V st\u0159\u00eddav\u00e9ho proudu<\/li>\n\n\n<li>1\u201363A<\/li>\n\n\n<li>r\u016fzn\u00e9 konfigurace p\u00f3l\u016f<\/li>\n\n\n<li>Dostupnost k\u0159ivek B\/C\/D<\/li>\n\n\n<li>10 kA Icn<\/li>\n\n\n<li>7,5 kA Ics<\/li>\n\n<\/ul>\n\n<p class=\"wp-block-paragraph\">D\u00edky t\u011bmto hodnocen\u00edm lze tyto modely porovn\u00e1vat z hlediska zve\u0159ejn\u011bn\u00e9 zkratov\u00e9 odolnosti.<\/p>\n\n<p class=\"wp-block-paragraph\">Nestanovuje po\u017eadovanou t\u0159\u00eddu pro instalaci u kupuj\u00edc\u00edho.<\/p>\n\n<h3 class=\"wp-block-heading\">Kter\u00e9 sou\u010dasn\u00e9 modely RITOKS uv\u00e1d\u011bj\u00ed hodnotu 6 kA?<\/h3>\n\n<p class=\"wp-block-paragraph\">Na t\u00e9to str\u00e1nce je uvedena hodnota 6 kA pro:<\/p>\n\n<p class=\"wp-block-paragraph\"><strong>RTSXD03<\/strong><\/p>\n\n<ul class=\"wp-block-list\">\n\n<li>240 V st\u0159\u00eddav\u00e9ho proudu<\/li>\n\n\n<li>1\u201332A<\/li>\n\n\n<li>1P+N<\/li>\n\n\n<li>6 kA<\/li>\n\n<\/ul>\n\n<p class=\"wp-block-paragraph\"><strong>RTSXD02<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">Tento <a href=\"https:\/\/ritoks.com\/cs\/products\/1pn-miniature-circuit-breaker-32a-6ka\/\">\u0158ada RTSXD02<\/a> zve\u0159ej\u0148uje:<\/p>\n\n<ul class=\"wp-block-list\">\n\n<li>240 V st\u0159\u00eddav\u00e9ho proudu<\/li>\n\n\n<li>1\u201332A<\/li>\n\n\n<li>1P+N<\/li>\n\n\n<li>6 kA<\/li>\n\n<\/ul>\n\n<p class=\"wp-block-paragraph\"><strong>RTS-ACM60<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">Tento <a href=\"https:\/\/ritoks.com\/cs\/products\/m60-ac-miniature-circuit-breaker-6-63a\/\">\u0158ada RTS-ACM60<\/a> zve\u0159ej\u0148uje:<\/p>\n\n<ul class=\"wp-block-list\">\n\n<li>230\/240 V st\u0159\u00eddav\u00e9ho proudu<\/li>\n\n\n<li>6\u201363A<\/li>\n\n\n<li>1P \/ 2P<\/li>\n\n\n<li>typicky 6 kA<\/li>\n\n<\/ul>\n\n<p class=\"wp-block-paragraph\">U modelu RTS-ACM60 je tato hodnota v\u00fdslovn\u011b podm\u00edn\u011bna p\u0159esn\u00fdm potvrzen\u00edm varianty.<\/p>\n\n<p class=\"wp-block-paragraph\">Tuto v\u00fdhradu je t\u0159eba br\u00e1t v \u00favahu p\u0159i ka\u017ed\u00e9m rozhodnut\u00ed o v\u00fdb\u011bru dodavatele.<\/p>\n\n<h3 class=\"wp-block-heading\">Jak\u00e9 m\u00edsto zauj\u00edm\u00e1 slu\u017eba Trip Curve v tomto srovn\u00e1n\u00ed?<\/h3>\n\n<p class=\"wp-block-paragraph\">K\u0159ivka zdvihu a brzdn\u00e1 s\u00edla jsou samostatn\u00e9 technick\u00e9 parametry.<\/p>\n\n<p class=\"wp-block-paragraph\">Kupuj\u00edc\u00ed by nap\u0159\u00edklad mohl pot\u0159ebovat:<\/p>\n\n<ul class=\"wp-block-list\">\n\n<li>K\u0159ivka C<\/li>\n\n\n<li>32A<\/li>\n\n\n<li>2P<\/li>\n\n\n<li>10 kA<\/li>\n\n<\/ul>\n\n<p class=\"wp-block-paragraph\">Ka\u017ed\u00e1 polo\u017eka popisuje n\u011bco jin\u00e9ho.<\/p>\n\n<p class=\"wp-block-paragraph\">Ozna\u010den\u00ed B\/C\/D se vztahuje k vyp\u00ednac\u00ed charakteristice jisti\u010de, zat\u00edmco jmenovit\u00fd zkratov\u00fd proud v kA popisuje vyp\u00ednac\u00ed schopnost za stanoven\u00fdch jmenovit\u00fdch podm\u00ednek.<\/p>\n\n<p class=\"wp-block-paragraph\">Podrobn\u00fd popis charakteristik cesty najdete v <a href=\"https:\/\/ritoks.com\/cs\/b-curve-vs-c-curve-vs-d-curve-mcb\/\">Jisti\u010de s charakteristikou B, C a D: V \u010dem spo\u010d\u00edv\u00e1 rozd\u00edl?<\/a><\/p>\n\n<p class=\"wp-block-paragraph\">Nepou\u017e\u00edvejte vyp\u00ednac\u00ed k\u0159ivku k odvozen\u00ed vyp\u00ednac\u00edho proudu ani vyp\u00ednac\u00ed proud k odvozen\u00ed vyp\u00ednac\u00ed k\u0159ivky.<\/p>\n\n<h2 id=\"selection-process\" class=\"wp-block-heading\">Bezpe\u010dn\u011bj\u0161\u00ed postup p\u0159i volb\u011b brzdn\u00e9 kapacity<\/h2>\n\n<p class=\"wp-block-paragraph\">Technick\u00fd proces zad\u00e1v\u00e1n\u00ed ve\u0159ejn\u00fdch zak\u00e1zek lze udr\u017eet v jednoduch\u00e9 podob\u011b, ani\u017e by se z n\u011bj stal v\u00fdpo\u010det proudov\u00e9ho zat\u00ed\u017een\u00ed.<\/p>\n\n<h3 class=\"wp-block-heading\">1. Stanovte po\u017eadovanou zkratovou odolnost<\/h3>\n\n<p class=\"wp-block-paragraph\">Pou\u017eijte elektrotechnick\u00fd n\u00e1vrh projektu, technick\u00e9 specifikace nebo ov\u011b\u0159en\u00e9 \u00fadaje o p\u0159edpokl\u00e1dan\u00e9m zkratov\u00e9m proudu.<\/p>\n\n<p class=\"wp-block-paragraph\">Nepou\u017e\u00edvejte k odhadu po\u017eadovan\u00e9 hodnoty pouze typ budovy.<\/p>\n\n<h3 class=\"wp-block-heading\">2. Potvr\u010fte ozna\u010den\u00ed normy a klasifikace<\/h3>\n\n<p class=\"wp-block-paragraph\">Zkontrolujte, zda je po\u017eadovan\u00e1 hodnota uvedena takto:<\/p>\n\n<ul class=\"wp-block-list\">\n\n<li>Icn<\/li>\n\n\n<li>Ics<\/li>\n\n\n<li>Icu<\/li>\n\n\n<li>nebo jin\u00fd relevantn\u00ed parametr zkratu<\/li>\n\n<\/ul>\n\n<p class=\"wp-block-paragraph\">Nep\u0159edpokl\u00e1dejte, \u017ee tyto pojmy jsou zam\u011bniteln\u00e9.<\/p>\n\n<h3 class=\"wp-block-heading\">3. Ov\u011b\u0159te nap\u011bt\u00ed<\/h3>\n\n<p class=\"wp-block-paragraph\">Odolnost proti zkratu lze spojovat s jmenovit\u00fdm provozn\u00edm nap\u011bt\u00edm.<\/p>\n\n<p class=\"wp-block-paragraph\">Stav nap\u011bt\u00ed by proto m\u011bl b\u00fdt kontrolov\u00e1n spole\u010dn\u011b s hodnotou kA.<\/p>\n\n<h3 class=\"wp-block-heading\">4. Najd\u011bte p\u0159esn\u011b stejn\u00fd produkt<\/h3>\n\n<p class=\"wp-block-paragraph\">Ov\u011b\u0159te:<\/p>\n\n<ul class=\"wp-block-list\">\n\n<li>p\u0159esn\u00fd model<\/li>\n\n\n<li>nap\u011bt\u00ed<\/li>\n\n\n<li>aktu\u00e1ln\u00ed<\/li>\n\n\n<li>sloupy<\/li>\n\n\n<li>pr\u016fb\u011bh k\u0159ivky<\/li>\n\n\n<li>rozlomov\u00e1 pevnost<\/li>\n\n\n<li>platn\u00e1 norma<\/li>\n\n\n<li>varianta<\/li>\n\n<\/ul>\n\n<h3 class=\"wp-block-heading\">5. V p\u0159\u00edpad\u011b pot\u0159eby si vy\u017e\u00e1dejte technickou dokumentaci<\/h3>\n\n<p class=\"wp-block-paragraph\">Pokud projekt vy\u017eaduje form\u00e1ln\u00ed technick\u00e9 ov\u011b\u0159en\u00ed, vy\u017e\u00e1dejte si p\u0159esnou dokumentaci k produktu, m\u00edsto abyste se spol\u00e9hali pouze na shrnut\u00ed na marketingov\u00e9 str\u00e1nce.<\/p>\n\n<figure data-spectra-id=\"spectra-ff8df28b-6c8e-4413-a5dd-cda125013151\" class=\"wp-block-image aligncenter size-full has-custom-border\" ><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/mcb-breaking-capacity-verification-flow.jpg\" alt=\"Koncep\u010dn\u00ed postup ov\u011b\u0159ov\u00e1n\u00ed jmenovit\u00e9 vyp\u00ednac\u00ed schopnosti jisti\u010de od projektov\u00fdch po\u017eadavk\u016f a\u017e po p\u0159esn\u00fd model\" class=\"wp-image-711\"  width=\"1672\" height=\"941\" srcset=\"https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/mcb-breaking-capacity-verification-flow.jpg 1672w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/mcb-breaking-capacity-verification-flow-600x338.jpg 600w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/mcb-breaking-capacity-verification-flow-300x169.jpg 300w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/mcb-breaking-capacity-verification-flow-1024x576.jpg 1024w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/mcb-breaking-capacity-verification-flow-768x432.jpg 768w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/mcb-breaking-capacity-verification-flow-1536x864.jpg 1536w\" sizes=\"auto, (max-width: 1672px) 100vw, 1672px\" \/><figcaption class=\"wp-element-caption\">Postup koncep\u010dn\u00ed verifikace: po\u017eadavky projektu, p\u0159edpokl\u00e1dan\u00fd zkratov\u00fd proud, norma a nap\u011bt\u00ed, jmenovit\u00e1 vyp\u00ednac\u00ed schopnost a potvrzen\u00ed p\u0159esn\u00e9ho modelu.<\/figcaption><\/figure>\n\n<h2 id=\"common-mistakes\" class=\"wp-block-heading\">\u010cast\u00e9 chyby p\u0159i v\u00fdb\u011bru jisti\u010d\u016f MCB s proudovou zat\u00ed\u017eitelnost\u00ed 6 kA a 10 kA<\/h2>\n\n<h3 class=\"wp-block-heading\">\u201c6 kA je ur\u010deno pro dom\u00e1cnosti a 10 kA pro pr\u016fmysl\u201d<\/h3>\n\n<p class=\"wp-block-paragraph\">To je p\u0159\u00edli\u0161 obecn\u00e9.<\/p>\n\n<p class=\"wp-block-paragraph\">Spr\u00e1vn\u00e1 vyp\u00ednac\u00ed schopnost z\u00e1vis\u00ed na p\u0159edpokl\u00e1dan\u00fdch poruchov\u00fdch podm\u00ednk\u00e1ch a p\u0159\u00edslu\u0161n\u00fdch po\u017eadavc\u00edch projektu.<\/p>\n\n<h3 class=\"wp-block-heading\">\u201c10 kA je bezpe\u010dn\u011bj\u0161\u00ed ne\u017e 6 kA\u201d<\/h3>\n\n<p class=\"wp-block-paragraph\">Vy\u0161\u0161\u00ed hodnota brzdn\u00e9 kapacity nen\u00ed univerz\u00e1ln\u00edm m\u011b\u0159\u00edtkem bezpe\u010dnosti.<\/p>\n\n<p class=\"wp-block-paragraph\">Rozhoduj\u00edc\u00ed je, zda jmenovit\u00fd v\u00fdkon jisti\u010de odpov\u00edd\u00e1 skute\u010dn\u00fdm po\u017eadavk\u016fm dan\u00e9 instalace.<\/p>\n\n<h3 class=\"wp-block-heading\">Porovn\u00e1n\u00ed pouze hodnoty v kA<\/h3>\n\n<p class=\"wp-block-paragraph\">\u00dadaj o mezn\u00ed nosnosti je t\u0159eba posuzovat ve spojen\u00ed s:<\/p>\n\n<ul class=\"wp-block-list\">\n\n<li>standardn\u00ed<\/li>\n\n\n<li>nap\u011bt\u00ed<\/li>\n\n\n<li>ozna\u010den\u00ed hodnocen\u00ed<\/li>\n\n\n<li>p\u0159esn\u00fd v\u00fdrobek<\/li>\n\n<\/ul>\n\n<h3 class=\"wp-block-heading\">Pova\u017eov\u00e1n\u00ed Icn a Ics za identick\u00e9<\/h3>\n\n<p class=\"wp-block-paragraph\">Jedn\u00e1 se o r\u016fzn\u00e9 standardizovan\u00e9 koncepce chov\u00e1n\u00ed p\u0159i zkratu.<\/p>\n\n<h3 class=\"wp-block-heading\">Za p\u0159edpokladu, \u017ee panel SCCR odpov\u00edd\u00e1 vyp\u00ednac\u00ed schopnosti jisti\u010de MCB<\/h3>\n\n<p class=\"wp-block-paragraph\">Nesm\u00edte automaticky ztoto\u017e\u0148ovat zkratovou odolnost jednotliv\u00e9ho jisti\u010de se zkratov\u00fdm proudem cel\u00e9 sestavy.<\/p>\n\n<p class=\"wp-block-paragraph\">Technick\u00e9 parametry syst\u00e9mu a sestavy podl\u00e9haj\u00ed vlastn\u00edm po\u017eadavk\u016fm.<\/p>\n\n<h3 class=\"wp-block-heading\">Vyu\u017eit\u00ed str\u00e1nky produktu pro v\u00fdpo\u010det poruchov\u00e9ho proudu<\/h3>\n\n<p class=\"wp-block-paragraph\">Na str\u00e1nce produktu se dozv\u00edte, jak\u00e9 vlastnosti m\u00e1 jisti\u010d podle v\u00fdrobce.<\/p>\n\n<p class=\"wp-block-paragraph\">Nedok\u00e1\u017ee ur\u010dit p\u0159edpokl\u00e1dan\u00fd zkratov\u00fd proud ve va\u0161\u00ed instalaci.<\/p>\n\n<h2 id=\"mcb-rfq\" class=\"wp-block-heading\">Co by m\u011bli kupuj\u00edc\u00ed uv\u00e9st v popt\u00e1vce na MCB?<\/h2>\n\n<p class=\"wp-block-paragraph\">Aby byla popt\u00e1vka na dod\u00e1vku jisti\u010d\u016f jasn\u011bj\u0161\u00ed, uve\u010fte:<\/p>\n\n<ul class=\"wp-block-list\">\n\n<li>syst\u00e9mov\u00e9 nap\u011bt\u00ed<\/li>\n\n\n<li>po\u017eadovan\u00fd jmenovit\u00fd proud<\/li>\n\n\n<li>uspo\u0159\u00e1d\u00e1n\u00ed ty\u010d\u00ed<\/li>\n\n\n<li>po\u017eadovan\u00e1 pr\u016fb\u011bhov\u00e1 k\u0159ivka<\/li>\n\n\n<li>po\u017eadovan\u00e1 brzdn\u00e1 s\u00edla<\/li>\n\n\n<li>p\u0159\u00edslu\u0161n\u00e1 norma, je-li uvedena<\/li>\n\n\n<li>po\u017eadovan\u00e9 ozna\u010den\u00ed Icn \/ Ics \/ jin\u00e9, je-li uvedeno<\/li>\n\n\n<li>mno\u017estv\u00ed<\/li>\n\n\n<li>\u017e\u00e1dost<\/li>\n\n\n<li>po\u017eadovan\u00e1 technick\u00e1 dokumentace<\/li>\n\n<\/ul>\n\n<p class=\"wp-block-paragraph\">Pokud dosud nebyla stanovena p\u0159esn\u00e1 po\u017eadovan\u00e1 zkratov\u00e1 odolnost, je t\u0159eba tuto ot\u00e1zku vy\u0159e\u0161it v r\u00e1mci elektrick\u00e9ho n\u00e1vrhu je\u0161t\u011b p\u0159edt\u00edm, ne\u017e se p\u0159i kone\u010dn\u00e9m v\u00fdb\u011bru bude vych\u00e1zet pouze z dostupnosti v\u00fdrobku.<\/p>\n\n<h2 id=\"frequently-asked-questions\" class=\"wp-block-heading\">\u010casto kladen\u00e9 ot\u00e1zky<\/h2>\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Jak\u00fd je rozd\u00edl mezi jisti\u010dem 6 kA a 10 kA?<\/summary>\n\n<p class=\"wp-block-paragraph\">Rozd\u00edl spo\u010d\u00edv\u00e1 v jejich ud\u00e1van\u00e9 jmenovit\u00e9 vyp\u00ednac\u00ed schopnosti p\u0159i zkratu za platn\u00fdch jmenovit\u00fdch podm\u00ednek. Hodnota 10 kA p\u0159edstavuje vy\u0161\u0161\u00ed vyp\u00ednac\u00ed schopnost ne\u017e 6 kA, pokud jsou ostatn\u00ed parametry srovnateln\u00e9.<\/p>\n\n<\/details>\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Je 10 kA lep\u0161\u00ed ne\u017e 6 kA?<\/summary>\n\n<p class=\"wp-block-paragraph\">Ne automaticky. Hodnota 10 kA p\u0159edstavuje vy\u0161\u0161\u00ed jmenovitou vyp\u00ednac\u00ed schopnost, av\u0161ak spr\u00e1vn\u00fd po\u017eadavek z\u00e1vis\u00ed na p\u0159edpokl\u00e1dan\u00e9m zkratov\u00e9m proudu a p\u0159\u00edslu\u0161n\u00e9 projektov\u00e9 specifikaci.<\/p>\n\n<\/details>\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Co znamen\u00e1 zkratka \u201eIcn\u201c na jisti\u010di?<\/summary>\n\n<p class=\"wp-block-paragraph\">Podle normy IEC\/EN 60898-1 ozna\u010duje Icn jmenovitou zkratovou odolnost. Tuto hodnotu je t\u0159eba posuzovat s ohledem na p\u0159edpokl\u00e1dan\u00fd zkratov\u00fd proud v m\u00edst\u011b pou\u017eit\u00ed.<\/p>\n\n<\/details>\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Co je to Ics?<\/summary>\n\n<p class=\"wp-block-paragraph\">Ics je pojem ozna\u010duj\u00edc\u00ed vyp\u00ednac\u00ed schopnost za\u0159\u00edzen\u00ed p\u0159i zkratu, kter\u00fd je definov\u00e1n v p\u0159\u00edslu\u0161n\u00e9 norm\u011b. Nejedn\u00e1 se pouze o jin\u00fd n\u00e1zev pro Icn.<\/p>\n\n<\/details>\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Vypne se jisti\u010d s jmenovit\u00fdm proudem 10 kA rychleji ne\u017e jisti\u010d s jmenovit\u00fdm proudem 6 kA?<\/summary>\n\n<p class=\"wp-block-paragraph\">Samotn\u00e1 jmenovit\u00e1 vyp\u00ednac\u00ed schopnost v kA na tuto ot\u00e1zku neodpov\u00edd\u00e1. Chov\u00e1n\u00ed p\u0159i vypnut\u00ed je t\u0159eba posoudit na z\u00e1klad\u011b vyp\u00ednac\u00ed charakteristiky jisti\u010de a \u00fadaj\u016f o \u010dasov\u00e9 z\u00e1vislosti proudu, nikoli na z\u00e1klad\u011b hodnoty jeho vyp\u00ednac\u00ed schopnosti.<\/p>\n\n<\/details>\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Nab\u00edz\u00ed spole\u010dnost RITOKS jisti\u010de MCB s jmenovit\u00fdm proudem 6 kA i 10 kA?<\/summary>\n\n<p class=\"wp-block-paragraph\">Ano. Aktu\u00e1ln\u011b publikovan\u00e9 \u0159ady zahrnuj\u00ed varianty s 6 kA, jako jsou RTSXD02 a RTSXD03, a varianty s 10 kA Icn \/ 7,5 kA Ics, jako jsou RTSXD01 a RTSXD04. U modelu RTS-ACM60 je uvedeno 6 kA jako typick\u00e1 hodnota, kter\u00e1 podl\u00e9h\u00e1 potvrzen\u00ed konkr\u00e9tn\u00ed varianty.<\/p>\n\n<\/details>\n\n<div class=\"wp-block-group has-ast-global-color-5-color has-ast-global-color-2-background-color has-text-color has-background is-layout-constrained wp-container-core-group-is-layout-d8cb2258 wp-block-group-is-layout-constrained\" style=\"border-radius:6px;margin-top:48px;padding-top:40px;padding-right:32px;padding-bottom:40px;padding-left:32px\">\n\n<h2 class=\"wp-block-heading\">Pot\u0159ebujete pomoci s porovn\u00e1n\u00edm r\u016fzn\u00fdch typ\u016f jisti\u010d\u016f pro klimatizace?<\/h2>\n\n<p class=\"wp-block-paragraph\">Spole\u010dnost RITOKS uv\u00e1d\u00ed na trh \u0159ady miniaturn\u00edch jisti\u010d\u016f st\u0159\u00eddav\u00e9ho proudu s r\u016fzn\u00fdmi:<\/p>\n\n<ul class=\"wp-block-list\">\n\n<li>jmenovit\u00e9 proudy<\/li>\n\n\n<li>konfigurace ty\u010d\u00ed<\/li>\n\n\n<li>Dostupnost k\u0159ivek B\/C\/D<\/li>\n\n\n<li>\u00fadaje o mezn\u00ed nosnosti<\/li>\n\n\n<li>form\u00e1ty uchycen\u00ed<\/li>\n\n<\/ul>\n\n<p class=\"wp-block-paragraph\">Pou\u017eijte <a href=\"https:\/\/ritoks.com\/cs\/ac-mcb-rfq-checklist\/\">Kontroln\u00ed seznam pro popt\u00e1vku na AC MCB<\/a> uveden\u00ed po\u017eadovan\u00fdch elektrick\u00fdch parametr\u016f a p\u0159\u00edpadn\u00fdch specifick\u00fdch po\u017eadavk\u016f na zkratovou odolnost dan\u00e9ho projektu.<\/p>\n\n<p class=\"wp-block-paragraph\">C\u00edlem nen\u00ed pouze vybrat jisti\u010d s nejvy\u0161\u0161\u00ed hodnotou kA, ale sladit po\u017eadovan\u00e9 specifikace s ov\u011b\u0159enou konfigurac\u00ed v\u00fdrobku.<\/p>\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-ast-global-color-0-background-color has-background wp-element-button\" href=\"https:\/\/ritoks.com\/cs\/product-category\/ac-power-protection\/miniature-circuit-breakers\/\">Zobrazit miniaturn\u00ed jisti\u010de AC \u2192<\/a><\/div>\n\n\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-ast-global-color-0-background-color has-background wp-element-button\" href=\"https:\/\/ritoks.com\/cs\/ac-mcb-selection-guide\/\">P\u0159e\u010dt\u011bte si pr\u016fvodce v\u00fdb\u011brem jisti\u010d\u016f AC \u2192<\/a><\/div>\n\n\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-ast-global-color-0-background-color has-background wp-element-button\" href=\"https:\/\/ritoks.com\/cs\/b-curve-vs-c-curve-vs-d-curve-mcb\/\">Porovnejte jisti\u010de s k\u0159ivkami B, C a D \u2192<\/a><\/div>\n\n\n<div class=\"wp-block-button is-style-outline is-style-outline--1\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/ritoks.com\/cs\/contact-us\/\">Kontaktujte spole\u010dnost RITOKS \u2192 Po\u017e\u00e1dejte o cenovou nab\u00eddku<\/a><\/div>\n\n<\/div>\n\n<\/div>\n\n<\/div>","protected":false},"excerpt":{"rendered":"<p>6kA vs 10kA MCB: Understanding Breaking-Capacity Ratings When comparing miniature circuit breakers, 6kA and 10kA refer to short-circuit breaking-capacity ratings. [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"no-sidebar","site-content-layout":"page-builder","ast-site-content-layout":"full-width-container","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"disabled","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"disabled","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-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":"","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-4)","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-4)","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-4)","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":""}},"ritoks_resource_detail_renderer":null,"ritoks_resource_product_cat_term_id":0,"footnotes":""},"categories":[64],"tags":[],"class_list":["post-706","post","type-post","status-publish","format-standard","hentry","category-circuit-protection"],"acf":[],"spectra_blocks_featured_image_url":null,"spectra_blocks_author_info":{"display_name":"RITOKS","avatar_url":"https:\/\/secure.gravatar.com\/avatar\/6d7d0fc73468198f994ab13ef6eb6558c53b6ed1ad86364d5165efe8bdf8eb4a?s=96&d=mm&r=g","author_link":"https:\/\/ritoks.com\/cs\/author\/dazzlingwqbgmail-com\/","description":""},"_links":{"self":[{"href":"https:\/\/ritoks.com\/cs\/wp-json\/wp\/v2\/posts\/706","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ritoks.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ritoks.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ritoks.com\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ritoks.com\/cs\/wp-json\/wp\/v2\/comments?post=706"}],"version-history":[{"count":5,"href":"https:\/\/ritoks.com\/cs\/wp-json\/wp\/v2\/posts\/706\/revisions"}],"predecessor-version":[{"id":1961,"href":"https:\/\/ritoks.com\/cs\/wp-json\/wp\/v2\/posts\/706\/revisions\/1961"}],"wp:attachment":[{"href":"https:\/\/ritoks.com\/cs\/wp-json\/wp\/v2\/media?parent=706"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ritoks.com\/cs\/wp-json\/wp\/v2\/categories?post=706"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ritoks.com\/cs\/wp-json\/wp\/v2\/tags?post=706"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}