{"id":668,"date":"2026-09-05T09:23:49","date_gmt":"2026-09-05T09:23:49","guid":{"rendered":"https:\/\/ritoks.com\/?p=668"},"modified":"2026-09-23T14:09:11","modified_gmt":"2026-09-23T14:09:11","slug":"how-to-choose-dc-circuit-breaker-mcb-vs-mccb","status":"publish","type":"post","link":"https:\/\/ritoks.com\/cs\/how-to-choose-dc-circuit-breaker-mcb-vs-mccb\/","title":{"rendered":"Jak vybrat jisti\u010d pro stejnosm\u011brn\u00fd proud: MCB vs. MCCB"},"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-154c5234 wp-block-group-is-layout-constrained\" style=\"padding-top:clamp(40px, 5.625vw, 72px);padding-right:24px;padding-bottom:clamp(40px, 5.625vw, 72px);padding-left:24px\">\n<h1 class=\"wp-block-heading\">Jak vybrat jisti\u010d pro stejnosm\u011brn\u00fd proud: MCB vs. MCCB<\/h1>\n\n\n\n<figure data-spectra-id=\"spectra-88ab5346-253f-4d5e-a3ab-46d0d2008333\" class=\"wp-block-image size-full has-custom-border\" ><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/dc-mcb-mccb-solar-industrial-environment.jpg\" alt=\"Jisti\u010de DC typu MCB a MCCB v sol\u00e1rn\u00edch a pr\u016fmyslov\u00fdch elektrick\u00fdch syst\u00e9mech pracuj\u00edc\u00edch se stejnosm\u011brn\u00fdm proudem\" class=\"wp-image-672\" width=\"1672\" height=\"941\" srcset=\"https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/dc-mcb-mccb-solar-industrial-environment.jpg 1672w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/dc-mcb-mccb-solar-industrial-environment-600x338.jpg 600w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/dc-mcb-mccb-solar-industrial-environment-300x169.jpg 300w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/dc-mcb-mccb-solar-industrial-environment-1024x576.jpg 1024w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/dc-mcb-mccb-solar-industrial-environment-768x432.jpg 768w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/dc-mcb-mccb-solar-industrial-environment-1536x864.jpg 1536w\" sizes=\"auto, (max-width: 1672px) 100vw, 1672px\" \/><figcaption class=\"wp-element-caption\">Typick\u00e9 form\u00e1ty stejnosm\u011brn\u00fdch jisti\u010d\u016f (MCB) a jisti\u010d\u016f s kombinovan\u00fdm ovl\u00e1d\u00e1n\u00edm (MCCB), kter\u00e9 se pou\u017e\u00edvaj\u00ed p\u0159i posuzov\u00e1n\u00ed mo\u017enost\u00ed stejnosm\u011brn\u00fdch jisti\u010d\u016f.<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Rozhodov\u00e1n\u00ed mezi miniaturn\u00edm jisti\u010dem (MCB) pro stejnosm\u011brn\u00fd proud a jisti\u010dem v lisovan\u00e9m pouzd\u0159e (MCCB) pro stejnosm\u011brn\u00fd proud nen\u00ed tak jednoduch\u00e9, jak by se mohlo zd\u00e1t, kdy\u017e se MCB p\u0159i\u0159azuj\u00ed k \u201cmal\u00fdm proud\u016fm\u201d a MCCB k \u201cvelk\u00fdm proud\u016fm\u201d.\u201d<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-group alignfull is-layout-constrained wp-container-core-group-is-layout-4f00fe7e wp-block-group-is-layout-constrained\" style=\"padding-top:64px;padding-right:24px;padding-bottom:64px;padding-left:24px\">\n\n\n<p class=\"wp-block-paragraph\">Tato zkratka m\u016f\u017ee b\u00fdt zav\u00e1d\u011bj\u00edc\u00ed.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Aktu\u00e1ln\u00ed <a href=\"https:\/\/ritoks.com\/cs\/product-category\/dc-power-protection\/\">Ochrana stejnosm\u011brn\u00e9ho nap\u00e1jen\u00ed RITOKS<\/a> D\u016fvod je patrn\u00fd ji\u017e z nab\u00eddky produktov\u00fdch \u0159ad. Mezi publikovan\u00e9 jisti\u010de DC pro mont\u00e1\u017e na DIN li\u0161tu pat\u0159\u00ed modely v rozsahu 6\u201363 A i \u0159ada pro vysok\u00e9 proudy 63\u2013250 A, zat\u00edmco aktu\u00e1ln\u00ed \u0159ada jisti\u010d\u016f DC v lisovan\u00e9m pouzd\u0159e zahrnuje r\u00e1my 125 A a 250 A.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Jin\u00fdmi slovy, samotn\u00fd proudov\u00fd rozsah nesta\u010d\u00ed k spolehliv\u00e9mu rozli\u0161en\u00ed mezi MCB a MCCB.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Prakti\u010dt\u011bj\u0161\u00ed postup p\u0159i v\u00fdb\u011bru jisti\u010de pro stejnosm\u011brn\u00fd proud zohled\u0148uje:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Nap\u011bt\u00ed v stejnosm\u011brn\u00e9m syst\u00e9mu<\/li>\n\n\n<li>provozn\u00ed proud<\/li>\n\n\n<li>po\u017eadovan\u00fd po\u010det p\u00f3l\u016f<\/li>\n\n\n<li>zp\u016fsob upevn\u011bn\u00ed<\/li>\n\n\n<li>dostupn\u00e1 konfigurace produktu<\/li>\n\n\n<li>kontext aplikace<\/li>\n\n\n<li>potvrzen\u00e9 \u00fadaje o p\u0159esn\u00e9m modelu jisti\u010de<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">V tomto pr\u016fvodci se dozv\u00edte, jak porovnat varianty jisti\u010d\u016f DC MCB a MCCB, ani\u017e byste se museli spol\u00e9hat na univerz\u00e1ln\u00ed prahovou hodnotu proudu.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"in-this-guide\">V t\u00e9to p\u0159\u00edru\u010dce<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"#quick-answer\">Stru\u010dn\u00e1 odpov\u011b\u010f: MCB nebo MCCB?<\/a><\/li>\n\n\n<li><a href=\"#what-is-a-dc-mcb\">Co je to stejnosm\u011brn\u00fd jisti\u010d (DC MCB)?<\/a><\/li>\n\n\n<li><a href=\"#what-is-a-dc-mccb\">Co je to DC MCCB?<\/a><\/li>\n\n\n<li><a href=\"#why-current-alone-is-not-enough\">Pro\u010d pouh\u00fd proud nesta\u010d\u00ed<\/a><\/li>\n\n\n<li><a href=\"#selection-process\">Praktick\u00fd v\u00fdb\u011brov\u00fd proces<\/a><\/li>\n\n\n<li><a href=\"#common-mistakes\">\u010cast\u00e9 chyby p\u0159i v\u00fdb\u011bru<\/a><\/li>\n\n\n<li><a href=\"#frequently-asked-questions\">\u010casto kladen\u00e9 ot\u00e1zky<\/a><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"quick-answer\">Stru\u010dn\u00e1 odpov\u011b\u010f: MCB nebo MCCB?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">N\u00ed\u017ee uveden\u00e1 tabulka shrnuje sou\u010dasn\u00e9 postaven\u00ed produktov\u00e9 \u0159ady RITOKS na trhu.<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th>V\u00fdb\u011brov\u00fd faktor<\/th><th>DC jisti\u010d<\/th><th>DC jisti\u010d s mechanick\u00fdm sp\u00edn\u00e1n\u00edm<\/th><\/tr><\/thead><tbody><tr><td>Aktu\u00e1ln\u00ed form\u00e1t upevn\u011bn\u00ed RITOKS<\/td><td>35mm li\u0161ta DIN<\/td><td>Panel \/ pevn\u00e1 mont\u00e1\u017e<\/td><\/tr><tr><td>Aktu\u00e1ln\u00ed nab\u00eddka ty\u010d\u00ed RITOKS<\/td><td>1P \/ 2P v z\u00e1vislosti na modelu<\/td><td>2P v aktu\u00e1ln\u011b publikovan\u00e9 rodin\u011b<\/td><\/tr><tr><td>Zve\u0159ejn\u011bn\u00e9 aktu\u00e1ln\u00ed p\u0159\u00edklady<\/td><td>\u0158ady 6\u201363 A a 63\u2013250 A<\/td><td>R\u00e1my 125 A \/ 250 A<\/td><\/tr><tr><td>Publikovan\u00e9 p\u0159\u00edklady nap\u011bt\u00ed<\/td><td>\u0158ady 12\u2013125 V, 500 V a 500\u20131000 V DC<\/td><td>Varianty 500 V \/ 1 000 V<\/td><\/tr><tr><td>Hlavn\u00ed p\u0159\u00edstup k v\u00fdb\u011bru<\/td><td>Dodr\u017eujte p\u0159esn\u011b stanoven\u00e9 elektrick\u00e9 a instala\u010dn\u00ed po\u017eadavky<\/td><td>Dodr\u017eujte p\u0159esn\u011b stanoven\u00e9 elektrick\u00e9 a instala\u010dn\u00ed po\u017eadavky<\/td><\/tr><tr><td>M\u016f\u017ee o v\u00fdb\u011bru rozhodnout pouze proud?<\/td><td>Ne<\/td><td>Ne<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Jedn\u00e1 se o srovn\u00e1n\u00ed produktov\u00fdch \u0159ad, nikoli o obecn\u011b platn\u00e9 technick\u00e9 pravidlo.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Dostupn\u00e9 komer\u010dn\u00ed mo\u017enosti najdete v RITOKS <a href=\"https:\/\/ritoks.com\/cs\/product-category\/dc-power-protection\/dc-circuit-breakers\/\">Jisti\u010de stejnosm\u011brn\u00e9ho proudu<\/a> kategorie.<\/p>\n\n\n\n<figure data-spectra-id=\"spectra-626f0dbe-b26b-41cf-b708-1233941a862e\" class=\"wp-block-image size-full has-custom-border\" ><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/dc-breaker-product-family-comparison.jpg\" alt=\"Reprezentativn\u00ed \u0159ady jisti\u010d\u016f stejnosm\u011brn\u00e9ho proudu na pracovn\u00edm stole pro sol\u00e1rn\u00ed elektrick\u00e9 instalace\" class=\"wp-image-677\" width=\"1672\" height=\"941\" srcset=\"https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/dc-breaker-product-family-comparison.jpg 1672w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/dc-breaker-product-family-comparison-600x338.jpg 600w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/dc-breaker-product-family-comparison-300x169.jpg 300w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/dc-breaker-product-family-comparison-1024x576.jpg 1024w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/dc-breaker-product-family-comparison-768x432.jpg 768w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/dc-breaker-product-family-comparison-1536x864.jpg 1536w\" sizes=\"auto, (max-width: 1672px) 100vw, 1672px\" \/><figcaption class=\"wp-element-caption\">P\u0159ehled dostupn\u00fdch produktov\u00fdch \u0159ad jisti\u010d\u016f stejnosm\u011brn\u00e9ho proudu, slou\u017e\u00edc\u00ed pouze jako vizu\u00e1ln\u00ed pom\u016fcka pro orientaci p\u0159i v\u00fdb\u011bru.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"what-is-a-dc-mcb\">Co je to stejnosm\u011brn\u00fd jisti\u010d (DC MCB)?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Miniaturn\u00ed jisti\u010d (MCB) pro stejnosm\u011brn\u00fd proud je kompaktn\u00ed za\u0159\u00edzen\u00ed na ochranu elektrick\u00e9ho obvodu, kter\u00e9 se obvykle dod\u00e1v\u00e1 v proveden\u00ed pro mont\u00e1\u017e na DIN li\u0161tu.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sou\u010dasn\u00e1 produktov\u00e1 \u0159ada jisti\u010d\u016f RITOKS DC MCB zahrnuje n\u011bkolik r\u016fzn\u00fdch \u0159ad, nikoli pouze jeden jedin\u00fd rozsah jmenovit\u00fdch hodnot.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nap\u0159\u00edklad:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/ritoks.com\/cs\/products\/2p-dc-miniature-circuit-breaker-500-1000v-6-63a\/\">RTS-DC63-1000<\/a> \u2014 2P, 500\u20131000 V DC, 6\u201363 A, 35mm DIN li\u0161ta<\/li>\n\n\n<li>RTS-DC63-500 \u2014 2P, 500 V DC, 6\u201363 A, 35 mm DIN li\u0161ta<\/li>\n\n\n<li><a href=\"https:\/\/ritoks.com\/cs\/products\/high-current-dc-miniature-circuit-breaker-12-125v-63-250a\/\">RTS-DC250-125<\/a> \u2014 1P\/2P, 12\u2013125 V DC, 63\u2013250 A, 35mm DIN li\u0161ta<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Tyto p\u0159\u00edklady ilustruj\u00ed d\u016fle\u017eit\u00fd princip v\u00fdb\u011bru:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u201cZkratka \u201dMCB\u201c ozna\u010duje konstrukci v\u00fdrobku a typovou \u0159adu; nem\u011bla by b\u00fdt z\u00fa\u017eena pouze na jeden proudov\u00fd limit.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Dostupn\u00fd model je je\u0161t\u011b t\u0159eba porovnat se skute\u010dn\u00fdm stejnosm\u011brn\u00fdm syst\u00e9mem.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Dal\u0161\u00ed mo\u017enosti najdete na str\u00e1nce <a href=\"https:\/\/ritoks.com\/cs\/product-category\/dc-power-protection\/dc-circuit-breakers\/dc-miniature-circuit-breakers\/\">Miniaturn\u00ed jisti\u010de na stejnosm\u011brn\u00fd proud<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"what-is-a-dc-mccb\">Co je to DC MCCB?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Jisti\u010d s lisovan\u00fdm pouzdrem pro stejnosm\u011brn\u00fd proud (MCCB) m\u00e1 konstrukci s lisovan\u00fdm pouzdrem a jeho instalace se obvykle li\u0161\u00ed od instalace miniaturn\u00edho jisti\u010de na DIN li\u0161tu.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V sou\u010dasn\u00e9 dob\u011b je v nab\u00eddce n\u00e1sleduj\u00edc\u00ed \u0159ada jisti\u010d\u016f RITOKS MCCB:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/ritoks.com\/cs\/products\/2p-dc-molded-case-circuit-breaker-500-1000v-125-250a\/\"><strong>RTS-DCM250-1000<\/strong><\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Mezi potvrzen\u00e9 a zve\u0159ejn\u011bn\u00e9 vlastnosti pat\u0159\u00ed:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Konfigurace 2P<\/li>\n\n\n<li>Varianty 500 V \/ 1 000 V DC<\/li>\n\n\n<li>R\u00e1my 125 A \/ 250 A<\/li>\n\n\n<li>panel \/ pevn\u00e1 mont\u00e1\u017e<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">D\u00edky tomu se li\u0161\u00ed form\u00e1tem mont\u00e1\u017ee od st\u00e1vaj\u00edc\u00edch \u0159ad jisti\u010d\u016f RITOKS pro mont\u00e1\u017e na DIN li\u0161tu.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sou\u010dasn\u00e1 \u0159ada se v\u0161ak p\u0159ekr\u00fdv\u00e1 s \u0159adou jisti\u010d\u016f RTS-DC250-125. Proto sta\u010d\u00ed se zeptat:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u201cJe proud vy\u0161\u0161\u00ed ne\u017e ur\u010dit\u00e1 hodnota?\u201d<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">to nesta\u010d\u00ed k tomu, aby se rozhodlo mezi MCB a MCCB.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Aktu\u00e1ln\u00ed \u0159adu produkt\u016f s lisovan\u00fdm pouzdrem najdete na <a href=\"https:\/\/ritoks.com\/cs\/product-category\/dc-power-protection\/dc-circuit-breakers\/dc-molded-case-circuit-breakers\/\">Jisti\u010de s lisovan\u00fdm pouzdrem typu DC<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"why-current-alone-is-not-enough\">MCB vs. MCCB: Pro\u010d nesta\u010d\u00ed pouze proud<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">B\u011b\u017en\u00fdm zp\u016fsobem v\u00fdb\u011bru je vych\u00e1zet z p\u0159edpokladu, \u017ee jisti\u010de typu MCB se v\u017edy pou\u017e\u00edvaj\u00ed pro proudy ni\u017e\u0161\u00ed ne\u017e ur\u010dit\u00e1 hodnota a jisti\u010de typu MCCB pro proudy vy\u0161\u0161\u00ed ne\u017e tato hodnota.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sou\u010dasn\u00fd sortiment produkt\u016f RITOKS ukazuje, pro\u010d je tento p\u0159\u00edstup nespolehliv\u00fd.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Jisti\u010d RTS-DC250-125 pat\u0159\u00ed do \u0159ady jisti\u010d\u016f pro mont\u00e1\u017e na 35mm DIN li\u0161tu s uveden\u00fdmi proudov\u00fdmi hodnotami od 63 A do 250 A.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Jisti\u010d RTS-DCM250-1000 je k dispozici v proveden\u00edch s jmenovit\u00fdm proudem 125 A a 250 A.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tyto rozsahy se p\u0159ekr\u00fdvaj\u00ed.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Proto:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Po\u017eadavek na proud 125 A nebo 250 A v\u00e1m automaticky ne\u0159ekne, zda je spr\u00e1vn\u00fdm typem produktu jisti\u010d MCB nebo MCCB.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Rozhodnut\u00ed mus\u00ed naopak zohlednit cel\u00fd syst\u00e9m a instala\u010dn\u00ed po\u017eadavky.<\/p>\n\n\n\n<figure data-spectra-id=\"spectra-238ed512-e719-41ae-8369-18fe6e6b539b\" class=\"wp-block-image size-full has-custom-border\" ><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/dc-mcb-mccb-form-factor-comparison.jpg\" alt=\"Srovn\u00e1n\u00ed jisti\u010d\u016f DC na DIN li\u0161tu a kompaktn\u00edch jisti\u010d\u016f DC v sol\u00e1rn\u00ed rozvodn\u00e9 sk\u0159\u00edni pro stejnosm\u011brn\u00fd proud\" class=\"wp-image-676\" width=\"1672\" height=\"941\" srcset=\"https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/dc-mcb-mccb-form-factor-comparison.jpg 1672w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/dc-mcb-mccb-form-factor-comparison-600x338.jpg 600w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/dc-mcb-mccb-form-factor-comparison-300x169.jpg 300w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/dc-mcb-mccb-form-factor-comparison-1024x576.jpg 1024w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/dc-mcb-mccb-form-factor-comparison-768x432.jpg 768w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/dc-mcb-mccb-form-factor-comparison-1536x864.jpg 1536w\" sizes=\"auto, (max-width: 1672px) 100vw, 1672px\" \/><figcaption class=\"wp-element-caption\">N\u00e1zorn\u00e9 srovn\u00e1n\u00ed zp\u016fsob\u016f instalace jisti\u010d\u016f DC na DIN-li\u0161tu a kompaktn\u00edch jisti\u010d\u016f DC v rozvad\u011b\u010di pro stejnosm\u011brn\u00fd proud.<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">1. Za\u010dn\u011bte s nap\u011bt\u00edm stejnosm\u011brn\u00e9ho syst\u00e9mu<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Prvn\u00ed ot\u00e1zka by m\u011bla zn\u00edt:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Jak\u00e9 stejnosm\u011brn\u00e9 nap\u011bt\u00ed mus\u00ed jisti\u010d zvl\u00e1dnout?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sou\u010dasn\u00e9 \u0159ady jisti\u010d\u016f RITOKS pokr\u00fdvaj\u00ed velmi rozmanit\u00e9 nap\u011b\u0165ov\u00e9 rozsahy.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nap\u0159\u00edklad:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>jedna \u0159ada je ur\u010dena pro nap\u011bt\u00ed 12\u2013125 V DC<\/li>\n\n\n<li>dal\u0161\u00ed pro 500 V DC<\/li>\n\n\n<li>dal\u0161\u00ed pro 500\u20131000 V DC<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Sou\u010dasn\u00e1 \u0159ada jisti\u010d\u016f MCCB zahrnuje tak\u00e9 varianty pro stejnosm\u011brn\u00e9 nap\u011bt\u00ed 500 V a 1 000 V.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">To znamen\u00e1, \u017ee dva jisti\u010de s podobn\u00fdm jmenovit\u00fdm proudem mohou p\u0159esto b\u00fdt ur\u010deny pro aplikace s velmi odli\u0161n\u00fdm syst\u00e9mov\u00fdm nap\u011bt\u00edm.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nevyb\u00edrejte jisti\u010d pouze na z\u00e1klad\u011b jmenovit\u00e9ho proudu a nep\u0159edpokl\u00e1dejte, \u017ee t\u00edm budou spln\u011bny i po\u017eadavky na nap\u011bt\u00ed.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Je nutn\u00e9 zkontrolovat p\u0159esn\u00fd model a konfiguraci.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2. Ov\u011b\u0159te po\u017eadovan\u00fd provozn\u00ed proud<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Proud z\u016fst\u00e1v\u00e1 d\u016fle\u017eit\u00fdm v\u00fdb\u011brov\u00fdm krit\u00e9riem, ale je to pouze jedna z \u010d\u00e1st\u00ed rozhodovac\u00edho procesu.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Mezi sou\u010dasn\u00e9 \u0159ady jisti\u010d\u016f RITOKS nap\u0159\u00edklad pat\u0159\u00ed:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Varianty 6\u201363A<\/li>\n\n\n<li>Varianty 63\u2013250 A<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">zat\u00edmco sou\u010dasn\u00e1 \u0159ada jisti\u010d\u016f MCCB zahrnuje:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>R\u00e1m 125A<\/li>\n\n\n<li>R\u00e1m 250A<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Toto p\u0159ekr\u00fdv\u00e1n\u00ed znamen\u00e1, \u017ee aktu\u00e1ln\u00ed hodnota zu\u017euje v\u00fdb\u011br mo\u017en\u00fdch v\u00fdrobk\u016f, ale sama o sob\u011b neur\u010duje konstrukci jisti\u010de.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Spr\u00e1vn\u00fd v\u00fdb\u011br by m\u011bl b\u00fdt v\u017edy v souladu s p\u0159esnou dokumentac\u00ed k dan\u00e9mu modelu.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3. Zkontrolujte po\u010det p\u00f3l\u016f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Konfigurace sloupu m\u016f\u017ee rovn\u011b\u017e ovlivnit, kter\u00e1 produktov\u00e1 \u0159ada je vhodn\u00e1.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Mezi aktu\u00e1ln\u011b zve\u0159ejn\u011bn\u00e9 p\u0159\u00edklady RITOKS pat\u0159\u00ed:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u0158ady jisti\u010d\u016f 2P MCB<\/li>\n\n\n<li>\u0159ada n\u00edzkonap\u011b\u0165ov\u00fdch vysokoproud\u00fdch jisti\u010d\u016f typu 1P\/2P<\/li>\n\n\n<li>\u0159ada 2P jisti\u010d\u016f MCCB<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">P\u0159ed v\u00fdb\u011brem modelu by proto m\u011bl b\u00fdt stanoven po\u017eadovan\u00fd po\u010det p\u00f3l\u016f.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nep\u0159edpokl\u00e1dejte, \u017ee ka\u017ed\u00e1 \u0159ada jisti\u010d\u016f MCB nebo MCCB je k dispozici ve stejn\u00e9 konfiguraci p\u00f3l\u016f.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4. Zva\u017ete zp\u016fsob upevn\u011bn\u00ed<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">To je jeden z nejz\u0159eteln\u011bj\u0161\u00edch praktick\u00fdch rozd\u00edl\u016f v aktu\u00e1ln\u00ed nab\u00eddce RITOKS.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Aktu\u00e1ln\u00ed \u0159ady jisti\u010d\u016f pro stejnosm\u011brn\u00fd proud<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">V zve\u0159ejn\u011bn\u00fdch p\u0159\u00edkladech MCB se pou\u017e\u00edv\u00e1:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Mont\u00e1\u017e na 35mm DIN li\u0161tu<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Tento form\u00e1t se obvykle pou\u017e\u00edv\u00e1 pro kompaktn\u00ed modul\u00e1rn\u00ed instalaci uvnit\u0159 vhodn\u00fdch elektrick\u00fdch sk\u0159\u00edn\u00ed.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u0158ada proudov\u00fdch jisti\u010d\u016f DC MCCB<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">V zve\u0159ejn\u011bn\u00e9m p\u0159\u00edkladu s MCCB se pou\u017e\u00edv\u00e1:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>panel \/ pevn\u00e1 mont\u00e1\u017e<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00edm vznik\u00e1 z\u00e1sadn\u011b odli\u0161n\u00fd form\u00e1t instalace.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pokud tedy projekt ji\u017e stanovuje:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Modul\u00e1rn\u00ed za\u0159\u00edzen\u00ed pro mont\u00e1\u017e na DIN li\u0161tu<\/li>\n\n\n<li>za\u0159\u00edzen\u00ed v lisovan\u00e9m pouzd\u0159e pro mont\u00e1\u017e do rozvad\u011b\u010de<\/li>\n\n\n<li>konkr\u00e9tn\u00ed uspo\u0159\u00e1d\u00e1n\u00ed ohrady<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Po\u017eadavky na fyzickou mont\u00e1\u017e mohou v\u00fdb\u011br okam\u017eit\u011b z\u00fa\u017eit.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">To je \u010dasto u\u017eite\u010dn\u011bj\u0161\u00ed ne\u017e snaha ur\u010dit univerz\u00e1ln\u00ed hranici pro d\u011blen\u00ed proudu.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">5. Porovnejte p\u0159esnou konfiguraci produktu<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u201cMCB\u201d a \u201cMCCB\u201d jsou n\u00e1zvy produktov\u00fdch \u0159ad.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Neuv\u00e1d\u011bj\u00ed v\u0161echny vlastnosti konkr\u00e9tn\u00edho jisti\u010de.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">P\u0159ed objedn\u00e1n\u00edm si ov\u011b\u0159te p\u0159esn\u00fd model a p\u0159\u00edslu\u0161nou zve\u0159ejn\u011bnou konfiguraci.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">P\u0159ezkum zdroj\u016f by m\u011bl p\u0159inejmen\u0161\u00edm identifikovat:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Stejnosm\u011brn\u00e9 nap\u011bt\u00ed<\/li>\n\n\n<li>sou\u010dasn\u00fd po\u017eadavek<\/li>\n\n\n<li>uspo\u0159\u00e1d\u00e1n\u00ed ty\u010d\u00ed<\/li>\n\n\n<li>zp\u016fsob mont\u00e1\u017ee<\/li>\n\n\n<li>p\u0159esn\u00fd model v\u00fdrobku<\/li>\n\n\n<li>kontext aplikace<\/li>\n\n\n<li>jak\u00e9koli dal\u0161\u00ed po\u017eadovan\u00e9 zdokumentovan\u00e9 vlastnosti<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Pokud nen\u00ed hodnota parametru uvedena v dokumentaci k dan\u00e9mu modelu, nem\u011bla by se odvozovat na z\u00e1klad\u011b hodnot jin\u00e9ho jisti\u010de ze stejn\u00e9 obecn\u00e9 kategorie.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"mcb-vs-mccb-at-a-glance\">DC MCB vs. MCCB \u2013 stru\u010dn\u00fd p\u0159ehled<\/h2>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th>Ot\u00e1zka<\/th><th>Zv\u00e1\u017een\u00ed ohledn\u011b MCB<\/th><th>Zv\u00e1\u017een\u00ed pou\u017eit\u00ed jisti\u010de MCCB<\/th><\/tr><\/thead><tbody><tr><td>Je nutn\u00e1 mont\u00e1\u017e na DIN li\u0161tu?<\/td><td>Sou\u010dasn\u00e9 \u0159ady jisti\u010d\u016f RITOKS vyu\u017e\u00edvaj\u00ed 35mm DIN li\u0161tu<\/td><td>Sou\u010dasn\u00e9 dostupn\u00e9 modely MCCB se montuj\u00ed na rozvad\u011b\u010d nebo pevn\u011b<\/td><\/tr><tr><td>Pot\u0159ebuji 1P?<\/td><td>K dispozici v aktu\u00e1ln\u00ed \u0159ad\u011b RTS-DC250-125<\/td><td>Aktu\u00e1ln\u011b publikovan\u00e1 \u0159ada jisti\u010d\u016f MCCB je 2P<\/td><\/tr><tr><td>Je proud vy\u0161\u0161\u00ed ne\u017e 63 A?<\/td><td>Sou\u010dasn\u00e1 \u0159ada jisti\u010d\u016f RITOKS MCB pokr\u00fdv\u00e1 proudy a\u017e do 250 A<\/td><td>Sou\u010dasn\u00e1 \u0159ada jisti\u010d\u016f MCCB zahrnuje tak\u00e9 modely 125 A\/250 A<\/td><\/tr><tr><td>Pot\u0159ebuji 500 V nebo 1000 V stejnosm\u011brn\u00e9ho proudu?<\/td><td>K dispozici ve vybran\u00fdch \u0159ad\u00e1ch jisti\u010d\u016f MCB<\/td><td>K dispozici v aktu\u00e1ln\u00ed \u0159ad\u011b jisti\u010d\u016f MCCB<\/td><\/tr><tr><td>Mohu vyb\u00edrat pouze podle proudu?<\/td><td>Ne<\/td><td>Ne<\/td><\/tr><tr><td>M\u00e1m si ov\u011b\u0159it p\u0159esn\u00fd model?<\/td><td>Ano<\/td><td>Ano<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">D\u016fle\u017eit\u00e9 je si uv\u011bdomit, \u017ee nejde o to, \u017ee by jeden typ jisti\u010de byl \u201clep\u0161\u00ed\u201d.\u201d<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">D\u016fle\u017eit\u00e1 ot\u00e1zka zn\u00ed:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Kter\u00e1 konstrukce a konkr\u00e9tn\u00ed model spl\u0148uj\u00ed elektrick\u00e9 a instala\u010dn\u00ed po\u017eadavky tohoto stejnosm\u011brn\u00e9ho syst\u00e9mu?<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">P\u0159\u00edklad 1: Kompaktn\u00ed ochrana stejnosm\u011brn\u00e9ho proudu na li\u0161t\u011b DIN<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">P\u0159edpokl\u00e1dejme, \u017ee projekt vy\u017eaduje:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>jisti\u010d na DIN li\u0161tu<\/li>\n\n\n<li>potvrzen\u00e9 stejnosm\u011brn\u00e9 nap\u011bt\u00ed<\/li>\n\n\n<li>aktu\u00e1ln\u00ed po\u017eadavek v r\u00e1mci dostupn\u00e9 modelov\u00e9 \u0159ady<\/li>\n\n\n<li>konfigurace s op\u011brn\u00fdm sloupem<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">V takov\u00e9m p\u0159\u00edpad\u011b by se jako prvn\u00ed skupina v\u00fdrobk\u016f k prozkoum\u00e1n\u00ed mohly jevit st\u00e1vaj\u00edc\u00ed \u0159ady jisti\u010d\u016f DC MCB, proto\u017ee zve\u0159ejn\u011bn\u00e9 p\u0159\u00edklady jisti\u010d\u016f RITOKS MCB vyu\u017e\u00edvaj\u00ed 35mm DIN li\u0161tu.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nap\u0159\u00edklad \u0159ada RTS-DC63-1000 nab\u00edz\u00ed:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>2P<\/li>\n\n\n<li>500\u20131000 V DC<\/li>\n\n\n<li>6\u201363A<\/li>\n\n\n<li>35mm li\u0161ta DIN<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">To v\u0161ak neznamen\u00e1, \u017ee je automaticky vhodn\u00fd pro ka\u017ed\u00fd syst\u00e9m, kter\u00fd spl\u0148uje tyto z\u00e1kladn\u00ed hodnoty. Je t\u0159eba je\u0161t\u011b ov\u011b\u0159it konkr\u00e9tn\u00ed pou\u017eit\u00ed a produktovou dokumentaci.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">P\u0159\u00edklad 2: Po\u017eadavky na vysokoproud\u00e9 za\u0159\u00edzen\u00ed pro mont\u00e1\u017e na DIN li\u0161tu<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Vy\u0161\u0161\u00ed proudov\u00e1 z\u00e1t\u011b\u017e nemus\u00ed automaticky znamenat pou\u017eit\u00ed jisti\u010de MCCB.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">RTS-DC250-125 je \u0159ada jisk\u0159i\u0161t\u011b odoln\u00fdch jisti\u010d\u016f na stejnosm\u011brn\u00fd proud (DC MCB) s n\u00e1sleduj\u00edc\u00edmi vlastnostmi:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>1P \/ 2P<\/li>\n\n\n<li>12\u2013125 V DC<\/li>\n\n\n<li>63\u2013250 A<\/li>\n\n\n<li>35mm li\u0161ta DIN<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Jedn\u00e1 se o d\u016fle\u017eit\u00fd p\u0159\u00edklad, proto\u017ee p\u0159\u00edmo vyvrac\u00ed p\u0159edstavu, \u017ee ka\u017ed\u00e1 aplikace s vysok\u00fdm stejnosm\u011brn\u00fdm proudem mus\u00ed automaticky p\u0159ej\u00edt na jisti\u010d v lisovan\u00e9m pouzd\u0159e.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">St\u00e1le z\u00e1le\u017e\u00ed na nap\u011bt\u00ed v s\u00edti a zp\u016fsobu instalace.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">P\u0159\u00edklad 3: Po\u017eadavky na lisovan\u00e9 sk\u0159\u00edn\u011b pro mont\u00e1\u017e do rozvad\u011b\u010de<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Pokud projekt vy\u017eaduje jisti\u010d v lisovan\u00e9m pouzd\u0159e v proveden\u00ed pro mont\u00e1\u017e do rozvad\u011b\u010de nebo pevnou mont\u00e1\u017e, je vhodnou volbou \u0159ada RTS-DCM250-1000.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Jeho zve\u0159ejn\u011bn\u00e1 konfigurace zahrnuje:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>2P<\/li>\n\n\n<li>Varianty 500 V \/ 1 000 V<\/li>\n\n\n<li>R\u00e1my 125 A \/ 250 A<\/li>\n\n\n<li>panel \/ pevn\u00e1 mont\u00e1\u017e<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Op\u011bt plat\u00ed, \u017ee kone\u010dn\u00e9 rozhodnut\u00ed by m\u011blo vych\u00e1zet z konkr\u00e9tn\u00ed zvolen\u00e9 varianty a potvrzen\u00fdch \u00fadaj\u016f o v\u00fdrobku, nikoli pouze z n\u00e1zvu produktov\u00e9 \u0159ady.<\/p>\n\n\n\n<figure data-spectra-id=\"spectra-7f0a8242-00d6-49c6-a77c-4b4a3d91469b\" class=\"wp-block-image size-full has-custom-border\" ><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/dc-circuit-breaker-application-context.jpg\" alt=\"Vyu\u017eit\u00ed stejnosm\u011brn\u00fdch jisti\u010d\u016f v sol\u00e1rn\u00edch fotovoltaick\u00fdch syst\u00e9mech s akumulac\u00ed energie do bateri\u00ed a v pr\u016fmyslov\u00fdch rozvodn\u00fdch syst\u00e9mech na stejnosm\u011brn\u00fd proud\" class=\"wp-image-674\" width=\"1672\" height=\"941\" srcset=\"https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/dc-circuit-breaker-application-context.jpg 1672w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/dc-circuit-breaker-application-context-600x338.jpg 600w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/dc-circuit-breaker-application-context-300x169.jpg 300w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/dc-circuit-breaker-application-context-1024x576.jpg 1024w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/dc-circuit-breaker-application-context-768x432.jpg 768w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/dc-circuit-breaker-application-context-1536x864.jpg 1536w\" sizes=\"auto, (max-width: 1672px) 100vw, 1672px\" \/><figcaption class=\"wp-element-caption\">Ilustrativn\u00ed p\u0159\u00edklady stejnosm\u011brn\u00fdch elektrick\u00fdch syst\u00e9m\u016f zn\u00e1zor\u0148uj\u00edc\u00ed aplikace v oblasti fotovoltaiky, akumulace energie v bateri\u00edch a pr\u016fmyslov\u00e9 distribuce stejnosm\u011brn\u00e9ho proudu.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"selection-process\">Praktick\u00fd postup p\u0159i v\u00fdb\u011bru stejnosm\u011brn\u00fdch jisti\u010d\u016f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Pracovn\u00ed postup v\u00fdb\u011bru, kter\u00fd lze l\u00e9pe obh\u00e1jit, vypad\u00e1 takto:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Krok 1 \u2013 Stanovte stejnosm\u011brn\u00e9 nap\u011bt\u00ed<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">P\u0159ed porovn\u00e1n\u00edm jednotliv\u00fdch model\u016f si ov\u011b\u0159te skute\u010dn\u00e9 syst\u00e9mov\u00e9 nap\u011bt\u00ed.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Krok 2 \u2014 Stanoven\u00ed provozn\u00edho proudu<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Zadejte po\u017eadovan\u00fd proud, abyste z\u00fa\u017eili v\u00fdb\u011br dostupn\u00fdch produktov\u00fdch \u0159ad.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Krok 3 \u2014 Stanoven\u00ed po\u017eadavk\u016f na sloupy<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Zjist\u011bte, zda dan\u00fd obvod vy\u017eaduje konfiguraci, kter\u00e1 je v sou\u010dasn\u00e9 dob\u011b k dispozici ve vybran\u00e9 \u0159ad\u011b.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Krok 4 \u2013 Ur\u010den\u00ed form\u00e1tu p\u0159ipojen\u00ed<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Zjist\u011bte, zda je instalace navr\u017eena s ohledem na:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>35mm li\u0161ta DIN<\/li>\n\n\n<li>panel \/ pevn\u00e1 mont\u00e1\u017e<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Krok 5 \u2014 Porovn\u00e1n\u00ed kandid\u00e1tsk\u00fdch model\u016f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Porovn\u00e1vejte pouze produkty, jejich\u017e uveden\u00e9 hodnoty nap\u011bt\u00ed, proudu, po\u010dtu p\u00f3l\u016f a mont\u00e1\u017en\u00ed konfigurace odpov\u00eddaj\u00ed po\u017eadavk\u016fm projektu.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Krok 6 \u2014 Ov\u011b\u0159te p\u0159esnost dokumentace<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Nepou\u017e\u00edvejte elektrick\u00e9 parametry, p\u0159\u00edslu\u0161enstv\u00ed ani \u00fadaje o v\u00fdkonu jednoho modelu pro jin\u00fd model.<\/p>\n\n\n\n<figure data-spectra-id=\"spectra-086a4691-5238-4394-ae00-22b575bf8f34\" class=\"wp-block-image size-full has-custom-border\" ><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/dc-circuit-breaker-selection-flow.jpg\" alt=\"Postup v\u00fdb\u011bru jisti\u010de stejnosm\u011brn\u00e9ho proudu na z\u00e1klad\u011b nap\u011bt\u00ed, proudu, po\u010dtu p\u00f3l\u016f, zp\u016fsobu mont\u00e1\u017ee a ov\u011b\u0159en\u00ed p\u0159esn\u00e9ho modelu\" class=\"wp-image-673\" width=\"1672\" height=\"941\" srcset=\"https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/dc-circuit-breaker-selection-flow.jpg 1672w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/dc-circuit-breaker-selection-flow-600x338.jpg 600w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/dc-circuit-breaker-selection-flow-300x169.jpg 300w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/dc-circuit-breaker-selection-flow-1024x576.jpg 1024w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/dc-circuit-breaker-selection-flow-768x432.jpg 768w, https:\/\/ritoks.com\/wp-content\/uploads\/2026\/09\/dc-circuit-breaker-selection-flow-1536x864.jpg 1536w\" sizes=\"auto, (max-width: 1672px) 100vw, 1672px\" \/><figcaption class=\"wp-element-caption\">Praktick\u00fd postup pro v\u00fdb\u011br stejnosm\u011brn\u00e9ho jisti\u010de na z\u00e1klad\u011b nap\u011bt\u00ed, proudu, po\u010dtu p\u00f3l\u016f, zp\u016fsobu mont\u00e1\u017ee a ov\u011b\u0159en\u00ed p\u0159esn\u00e9ho modelu.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"common-mistakes\">\u010cast\u00e9 chyby p\u0159i v\u00fdb\u011bru jisti\u010d\u016f typu MCB a MCCB<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Pou\u017eit\u00ed pevn\u00e9 prahov\u00e9 hodnoty proudu<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Toto je ta nejd\u016fle\u017eit\u011bj\u0161\u00ed chyba, kter\u00e9 je t\u0159eba se vyvarovat.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sou\u010dasn\u00fd sortiment spole\u010dnosti RITOKS ji\u017e zahrnuje jisti\u010de typu MCB a MCCB s p\u0159ekr\u00fdvaj\u00edc\u00edmi se hodnotami proudu.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Zanedb\u00e1n\u00ed stejnosm\u011brn\u00e9ho nap\u011bt\u00ed<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Jisti\u010d, kter\u00fd spl\u0148uje po\u017eadavky na proud, m\u016f\u017ee p\u0159esto pat\u0159it do nespr\u00e1vn\u00e9 nap\u011b\u0165ov\u00e9 skupiny.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Ignorov\u00e1n\u00ed form\u00e1tu p\u0159ipojen\u00ed<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Jisti\u010d (MCB) na DIN li\u0161tu a jisti\u010d (MCCB) pro mont\u00e1\u017e do rozvad\u011b\u010de vy\u017eaduj\u00ed odli\u0161n\u00e9 zp\u016fsoby instalace.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Za p\u0159edpokladu, \u017ee ka\u017ed\u00e1 rodina m\u00e1 stejn\u00e9 p\u00f3ly<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Aktu\u00e1ln\u00ed konfigurace se li\u0161\u00ed podle produktov\u00e9 \u0159ady.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">P\u0159edpoklad o nepotvrzen\u00e9 p\u0159et\u00ed\u017eiteln\u00e9 kapacit\u011b<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u00dadaje o mezn\u00ed zat\u00ed\u017eitelnosti mus\u00ed b\u00fdt v\u017edy v\u00e1z\u00e1ny na konkr\u00e9tn\u00ed potvrzen\u00fd model nebo variantu. Nem\u011bly by b\u00fdt zobec\u0148ov\u00e1ny na cel\u00e9 \u0159ady MCB a MCCB.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">P\u0159edpokl\u00e1dan\u00e9 funkce nebo p\u0159\u00edslu\u0161enstv\u00ed pro v\u00fdlety<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Nep\u0159edpokl\u00e1dejte, \u017ee jsou k dispozici nastaviteln\u00e9 sp\u00ednac\u00ed prahy, sp\u00ednac\u00ed k\u0159ivky, funkce sp\u00edn\u00e1n\u00ed p\u0159es odbo\u010dku nebo p\u0159\u00edslu\u0161enstv\u00ed, pokud to nen\u00ed v\u00fdslovn\u011b potvrzeno pro konkr\u00e9tn\u00ed jisti\u010d, kter\u00fd je p\u0159edm\u011btem dod\u00e1vky.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">V\u00fdb\u011br pouze na z\u00e1klad\u011b vzhledu<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Vzhled jisti\u010de s\u00e1m o sob\u011b neur\u010duje jeho vhodnost pro konkr\u00e9tn\u00ed stejnosm\u011brn\u00fd obvod.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Jak\u00e9 m\u00edsto zauj\u00edmaj\u00ed jisti\u010de typu MCB a MCCB v oblasti ochrany stejnosm\u011brn\u00fdch obvod\u016f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Jisti\u010de p\u0159edstavuj\u00ed pouze jednu sou\u010d\u00e1st \u0161ir\u0161\u00edho syst\u00e9mu ochrany stejnosm\u011brn\u00e9ho proudu.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V z\u00e1vislosti na konstrukci syst\u00e9mu mohou dal\u0161\u00ed funkce zahrnovat:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/ritoks.com\/cs\/dc-fuse-vs-dc-circuit-breaker\/\">pojistkov\u00e1 ochrana<\/a><\/li>\n\n\n<li>ru\u010dn\u00ed izolace<\/li>\n\n\n<li>ochrana proti p\u0159ep\u011bt\u00ed<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">P\u0159ehled rozd\u00edl\u016f mezi t\u011bmito funkcemi najdete zde:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/ritoks.com\/cs\/dc-protection-devices-explained\/\"><strong>Vysv\u011btlen\u00ed za\u0159\u00edzen\u00ed na ochranu stejnosm\u011brn\u00e9ho proudu: jisti\u010de, pojistky, odpojova\u010de a p\u0159ep\u011b\u0165ov\u00e9 ochrany (SPD)<\/strong><\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V tomto n\u00e1vodu je vysv\u011btleno, pro\u010d by jisti\u010d, pojistka, odpojova\u010d a p\u0159ep\u011b\u0165ov\u00e1 ochrana nem\u011bly b\u00fdt automaticky pova\u017eov\u00e1ny za vz\u00e1jemn\u011b zam\u011bniteln\u00e9 za\u0159\u00edzen\u00ed.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"frequently-asked-questions\">\u010casto kladen\u00e9 ot\u00e1zky<\/h2>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Pou\u017e\u00edv\u00e1 se jisti\u010d typu MCCB v\u017edy pro vy\u0161\u0161\u00ed proud ne\u017e jisti\u010d typu MCB?<\/summary>\n<p class=\"wp-block-paragraph\">Ne. Sou\u010dasn\u00e1 \u0159ada RITOKS zahrnuje \u0159adu proudov\u00fdch jisti\u010d\u016f DC pro mont\u00e1\u017e na DIN li\u0161tu s jmenovit\u00fdm proudem od 63 A do 250 A a \u0159adu jisti\u010d\u016f DC MCCB s r\u00e1my pro 125 A a 250 A. Jejich proudov\u00e9 rozsahy se p\u0159ekr\u00fdvaj\u00ed, tak\u017ee v\u00fdb\u011br nelze ur\u010dovat pouze na z\u00e1klad\u011b proudu.<\/p>\n<\/details>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>V \u010dem spo\u010d\u00edv\u00e1 nejz\u0159eteln\u011bj\u0161\u00ed rozd\u00edl mezi sou\u010dasn\u00fdmi \u0159adami jisti\u010d\u016f RITOKS typu MCB a MCCB?<\/summary>\n<p class=\"wp-block-paragraph\">Nejz\u0159eteln\u011bj\u0161\u00edm potvrzen\u00fdm rozd\u00edlem je zp\u016fsob mont\u00e1\u017ee. Sou\u010dasn\u00e9 modely jisti\u010d\u016f RITOKS MCB se montuj\u00ed na 35mm DIN li\u0161tu, zat\u00edmco u uveden\u00e9 \u0159ady jisti\u010d\u016f MCCB se pou\u017e\u00edv\u00e1 mont\u00e1\u017e na desku nebo pevn\u00e1 mont\u00e1\u017e.<\/p>\n<\/details>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Mohu si vybrat mezi MCB a MCCB pouze na z\u00e1klad\u011b nap\u011bt\u00ed?<\/summary>\n<p class=\"wp-block-paragraph\">Ne. Nap\u011bt\u00ed je pouze jedn\u00edm z rozhoduj\u00edc\u00edch faktor\u016f. Je t\u0159eba zkontrolovat tak\u00e9 proud, po\u010det p\u00f3l\u016f, zp\u016fsob mont\u00e1\u017ee, p\u0159esnou konfiguraci modelu a po\u017eadavky na pou\u017eit\u00ed.<\/p>\n<\/details>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Je pro stejnosm\u011brn\u00fd obvod s proudem 250 A automaticky nutn\u00fd jisti\u010d MCCB?<\/summary>\n<p class=\"wp-block-paragraph\">Ne automaticky. Spole\u010dnost RITOKS v sou\u010dasn\u00e9 dob\u011b nab\u00edz\u00ed \u0159adu proudov\u00fdch jisti\u010d\u016f (MCB) pro stejnosm\u011brn\u00fd proud s jmenovit\u00fdm proudem a\u017e 250 A, stejn\u011b jako \u0159adu jisti\u010d\u016f MCCB s r\u00e1mem pro 250 A. Spr\u00e1vn\u00fd v\u00fdb\u011br z\u00e1vis\u00ed na konkr\u00e9tn\u00edch elektrick\u00fdch a instala\u010dn\u00edch po\u017eadavc\u00edch.<\/p>\n<\/details>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Jsou v\u0161echny jisti\u010de pro stejnosm\u011brn\u00fd proud vhodn\u00e9 pro stejn\u00e9 aplikace?<\/summary>\n<p class=\"wp-block-paragraph\">Ne. Aktu\u00e1ln\u011b dostupn\u00e9 \u0159ady jisti\u010d\u016f MCB se li\u0161\u00ed konfiguracemi nap\u011bt\u00ed, proudu a po\u010dtu p\u00f3l\u016f. Vhodnost je t\u0159eba ov\u011b\u0159it u konkr\u00e9tn\u00edho modelu.<\/p>\n<\/details>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>M\u011bla by se p\u0159i v\u00fdb\u011bru jisti\u010de porovn\u00e1vat jeho vyp\u00ednac\u00ed schopnost?<\/summary>\n<p class=\"wp-block-paragraph\">M\u016f\u017ee se jednat o d\u016fle\u017eitou vlastnost v\u00fdrobku, ale hodnota mus\u00ed vych\u00e1zet z ov\u011b\u0159en\u00e9 dokumentace k p\u0159esn\u00e9mu modelu nebo variant\u011b. Nepou\u017e\u00edvejte hodnotu jednoho v\u00fdrobku pro celou \u0159adu jisti\u010d\u016f MCB nebo MCCB.<\/p>\n<\/details>\n\n\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-737f6912 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<h2 class=\"wp-block-heading\">Pot\u0159ebujete pomoc s v\u00fdb\u011brem jisti\u010de DC (MCB nebo MCCB)?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Spole\u010dnost RITOKS nab\u00edz\u00ed jak \u0159adu miniaturn\u00edch jisti\u010d\u016f pro stejnosm\u011brn\u00fd proud, tak \u0159adu jisti\u010d\u016f v lisovan\u00e9m pouzd\u0159e pro stejnosm\u011brn\u00fd proud.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V p\u0159\u00edpad\u011b popt\u00e1vky po dod\u00e1vk\u00e1ch uve\u010fte:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Nap\u011bt\u00ed v stejnosm\u011brn\u00e9m syst\u00e9mu<\/li>\n\n\n<li>provozn\u00ed proud<\/li>\n\n\n<li>po\u017eadovan\u00e9 sloupy<\/li>\n\n\n<li>preferovan\u00fd form\u00e1t mont\u00e1\u017ee<\/li>\n\n\n<li>\u017e\u00e1dost<\/li>\n\n\n<li>ve\u0161ker\u00e9 po\u017eadovan\u00e9 zdokumentovan\u00e9 vlastnosti<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Spole\u010dnost RITOKS pak m\u016f\u017ee porovnat popt\u00e1vku s aktu\u00e1ln\u011b dostupn\u00fdmi produktov\u00fdmi \u0159adami a potvrzen\u00fdmi \u00fadaji o modelech.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\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\/dc-power-protection\/dc-circuit-breakers\/\">Zobrazit jisti\u010de DC \u2192<\/a><\/div>\n\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<\/div>\n<\/div>\n\n\n<\/div>","protected":false},"excerpt":{"rendered":"<p>How to Choose a DC Circuit Breaker: MCB vs MCCB Choosing between a DC miniature circuit breaker (MCB) and a [&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":"disabled","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 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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-668","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\/668","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=668"}],"version-history":[{"count":7,"href":"https:\/\/ritoks.com\/cs\/wp-json\/wp\/v2\/posts\/668\/revisions"}],"predecessor-version":[{"id":1450,"href":"https:\/\/ritoks.com\/cs\/wp-json\/wp\/v2\/posts\/668\/revisions\/1450"}],"wp:attachment":[{"href":"https:\/\/ritoks.com\/cs\/wp-json\/wp\/v2\/media?parent=668"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ritoks.com\/cs\/wp-json\/wp\/v2\/categories?post=668"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ritoks.com\/cs\/wp-json\/wp\/v2\/tags?post=668"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}