{"id":18935,"date":"2025-07-26T12:19:32","date_gmt":"2025-07-26T04:19:32","guid":{"rendered":"https:\/\/viox.com\/?p=18935"},"modified":"2026-03-28T16:08:02","modified_gmt":"2026-03-28T08:08:02","slug":"why-use-rccb-instead-of-mcb","status":"publish","type":"post","link":"https:\/\/test.viox.com\/cs\/why-use-rccb-instead-of-mcb\/","title":{"rendered":"RCCB vs MCB: Pro\u010d pou\u017e\u00edvat RCCB m\u00edsto MCB pro ochranu p\u0159ed \u00farazem elektrick\u00fdm proudem?"},"content":{"rendered":"<div class=\"product-intro\">\n<h2>P\u0159\u00edm\u00e1 odpov\u011b\u010f<\/h2>\n<p>Nepou\u017e\u00edv\u00e1te proudov\u00fd chr\u00e1ni\u010d (RCCB) m\u00edsto jisti\u010de (MCB) pro ka\u017ed\u00fd \u00fa\u010del. Pou\u017e\u00edv\u00e1te ho <strong>RCCB<\/strong> kdy\u017e pot\u0159ebujete <strong>ochranu p\u0159ed \u00farazem elektrick\u00fdm proudem a zemn\u00edm svodem<\/strong>, a pou\u017e\u00edv\u00e1te <strong>MCB<\/strong> kdy\u017e pot\u0159ebujete <strong>ochranu proti p\u0159et\u00ed\u017een\u00ed a zkratu<\/strong>. Ve v\u011bt\u0161in\u011b re\u00e1ln\u00fdch instalac\u00ed nen\u00ed spr\u00e1vn\u00e1 odpov\u011b\u010f proudov\u00fd chr\u00e1ni\u010d (RCCB) <em>nebo<\/em> jisti\u010d (MCB), ale <strong>proudov\u00fd chr\u00e1ni\u010d (RCCB) + jisti\u010d (MCB) dohromady<\/strong>, nebo jeden <a href=\"https:\/\/test.viox.com\/cs\/rcbo\/\">RCBO<\/a> kter\u00fd kombinuje ob\u011b funkce.<\/p>\n<p>Tento rozd\u00edl je d\u016fle\u017eit\u00fd, proto\u017ee <a href=\"https:\/\/test.viox.com\/cs\/mcb\/\">MCB<\/a> m\u016f\u017ee chr\u00e1nit kabely a za\u0159\u00edzen\u00ed p\u0159ed nadm\u011brn\u00fdm proudem, ale nedok\u00e1\u017ee detekovat mal\u00e9 svodov\u00e9 proudy, kter\u00e9 mohou proch\u00e1zet lidsk\u00fdm t\u011blem. <a href=\"https:\/\/test.viox.com\/cs\/rccb\/\">RCCB<\/a> je navr\u017een speci\u00e1ln\u011b pro detekci t\u00e9to nerovnov\u00e1hy a odpojen\u00ed obvodu dostate\u010dn\u011b rychle, aby se sn\u00ed\u017eilo riziko \u00farazu.<\/p>\n<p>Pokud je va\u0161e skute\u010dn\u00e1 ot\u00e1zka \u201ckter\u00e9 za\u0159\u00edzen\u00ed chr\u00e1n\u00ed lidi\u201d, odpov\u011b\u010f je jednoduch\u00e1: <strong>Proudov\u00fd chr\u00e1ni\u010d (RCCB) chr\u00e1n\u00ed lidi p\u0159ed zemn\u00edmi svody; jisti\u010d (MCB) chr\u00e1n\u00ed kabel\u00e1\u017e p\u0159ed nadproudov\u00fdmi poruchami.<\/strong> V praktick\u00e9m n\u00e1vrhu to obvykle znamen\u00e1, \u017ee ochrana proti rezidu\u00e1ln\u00edmu proudu mus\u00ed b\u00fdt kombinov\u00e1na s \u0159\u00e1dn\u011b koordinovanou nadproudovou ochranou, sp\u00ed\u0161e ne\u017e aby byla pova\u017eov\u00e1na za samostatnou n\u00e1hradu.<\/p>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/RCCB-and-MCB-installed-side-by-side-in-a-low-voltage-distribution-board.webp\" alt=\"RCCB and MCB installed side by side in a low voltage distribution board\" \/><figcaption><em>Pohled na instalaci: Proudov\u00fd chr\u00e1ni\u010d (RCCB) a jisti\u010d (MCB) namontovan\u00e9 vedle sebe v n\u00edzkonap\u011b\u0165ov\u00e9m rozvad\u011b\u010di pro komplexn\u00ed elektrickou ochranu.<\/em><\/figcaption><\/figure>\n<h2>Kl\u00ed\u010dov\u00e9 poznatky<\/h2>\n<ul>\n<li>Proudov\u00fd chr\u00e1ni\u010d (RCCB) a jisti\u010d (MCB) nejsou n\u00e1hrady. Chr\u00e1n\u00ed p\u0159ed r\u016fzn\u00fdmi typy poruch.<\/li>\n<li>Z\u00e1kladn\u00ed \u00falohou proudov\u00e9ho chr\u00e1ni\u010de (RCCB) je detekovat proudovou nerovnov\u00e1hu mezi f\u00e1zov\u00fdm a neutr\u00e1ln\u00edm vodi\u010dem.<\/li>\n<li>. <code>MCB<\/code> to <strong>ne<\/strong> poskytuj\u00ed osobn\u00ed ochranu p\u0159ed \u00farazem elektrick\u00fdm proudem.<\/li>\n<li>Ve v\u011bt\u0161in\u011b reziden\u010dn\u00edch a lehk\u00fdch komer\u010dn\u00edch syst\u00e9m\u016f je spr\u00e1vn\u00e1 strategie ochrany <strong>Jisti\u010d + proudov\u00fd chr\u00e1ni\u010d<\/strong> nebo <a href=\"https:\/\/test.viox.com\/cs\/rcbo\/\">RCBO<\/a>.<\/li>\n<li>Na mnoha trz\u00edch, <code>RCB<\/code> se pou\u017e\u00edv\u00e1 voln\u011b pro za\u0159\u00edzen\u00ed na ochranu proti rezidu\u00e1ln\u00edmu proudu, zat\u00edmco <code>RCCB<\/code> je p\u0159esn\u011bj\u0161\u00ed term\u00edn.<\/li>\n<\/ul>\n<h2>Proudov\u00fd chr\u00e1ni\u010d (RCCB) vs. jisti\u010d (MCB): Hlavn\u00ed rozd\u00edl<\/h2>\n<p>Nejjist\u011bj\u0161\u00ed zp\u016fsob, jak je porovnat, je pod\u00edvat se na poruchu, pro jej\u00ed\u017e detekci je ka\u017ed\u00e9 za\u0159\u00edzen\u00ed ur\u010deno.<\/p>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/Technical-infographic-comparing-RCCB-and-MCB-by-function-and-protection-type.webp\" alt=\"Technical infographic comparing RCCB and MCB by function and protection type\" \/><figcaption><em>Technick\u00e1 srovn\u00e1vac\u00ed infografika podrobn\u011b popisuj\u00edc\u00ed r\u016fzn\u00e9 funkce a typy ochrany proudov\u00e9ho chr\u00e1ni\u010de (RCCB) versus jisti\u010de (MCB).<\/em><\/figcaption><\/figure>\n<table style=\"border-collapse: collapse; width: 100%; text-align: left;\" border=\"1\">\n<thead>\n<tr>\n<th style=\"padding: 8px;\">Ochrann\u00e9 za\u0159\u00edzen\u00ed<\/th>\n<th style=\"padding: 8px;\">\u00dapln\u00fd formul\u00e1\u0159<\/th>\n<th style=\"padding: 8px;\">Hlavn\u00ed \u00faloha<\/th>\n<th style=\"padding: 8px;\">Detekuje<\/th>\n<th style=\"padding: 8px;\">Chr\u00e1n\u00ed p\u0159ed \u00farazem elektrick\u00fdm proudem?<\/th>\n<th style=\"padding: 8px;\">Typick\u00e1 role<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding: 8px;\">RCCB<\/td>\n<td style=\"padding: 8px;\">Proudov\u00fd chr\u00e1ni\u010d<\/td>\n<td style=\"padding: 8px;\">Odpoj\u00ed obvod, kdy\u017e zemn\u00ed svodov\u00fd proud te\u010de do zem\u011b<\/td>\n<td style=\"padding: 8px;\">Zemn\u00ed svod \/ nerovnov\u00e1ha rezidu\u00e1ln\u00edho proudu<\/td>\n<td style=\"padding: 8px;\">Ano, pro riziko \u00farazu zemn\u00edm proudem<\/td>\n<td style=\"padding: 8px;\">Osobn\u00ed ochrana a ochrana proti svodu<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\">MCB<\/td>\n<td style=\"padding: 8px;\">Miniaturn\u00ed jisti\u010d<\/td>\n<td style=\"padding: 8px;\">Odpoj\u00ed obvod, kdy\u017e proud p\u0159ekro\u010d\u00ed jmenovitou mez<\/td>\n<td style=\"padding: 8px;\">P\u0159et\u00ed\u017een\u00ed a zkrat<\/td>\n<td style=\"padding: 8px;\">Ne<\/td>\n<td style=\"padding: 8px;\">Nadproudov\u00e1 ochrana odbo\u010dovac\u00edho obvodu<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\">RCBO<\/td>\n<td style=\"padding: 8px;\">Proudov\u00fd chr\u00e1ni\u010d s nadproudovou ochranou<\/td>\n<td style=\"padding: 8px;\">Kombinuje ob\u011b funkce v jednom za\u0159\u00edzen\u00ed<\/td>\n<td style=\"padding: 8px;\">Zemn\u00ed svod + p\u0159et\u00ed\u017een\u00ed + zkrat<\/td>\n<td style=\"padding: 8px;\">Ano<\/td>\n<td style=\"padding: 8px;\">Kombinovan\u00e1 ochrana tam, kde z\u00e1le\u017e\u00ed na prostoru nebo selektivit\u011b<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Proto je srovn\u00e1v\u00e1n\u00ed <a href=\"https:\/\/test.viox.com\/cs\/rccb\/\">RCCB<\/a> a <a href=\"https:\/\/test.viox.com\/cs\/mcb\/\">MCB<\/a> jako by byly zam\u011bniteln\u00e9, zav\u00e1d\u011bj\u00edc\u00ed. Funk\u010dn\u011b nejsou zam\u011bniteln\u00e9. Jsou to dopl\u0148kov\u00e1 za\u0159\u00edzen\u00ed.<\/p>\n<p>Pokud chcete \u0161ir\u0161\u00ed terminologickou mapu, viz <a href=\"https:\/\/test.viox.com\/cs\/what-is-the-difference-between-mcb-mccb-rcb-rcd-rccb-and-rcbo\/\">Jak\u00fd je rozd\u00edl mezi MCB, MCCB, RCB, RCD, RCCB a RCBO?<\/a>.<\/p>\n<h2>Jak\u00e1 je funkce proudov\u00e9ho chr\u00e1ni\u010de (RCCB)?<\/h2>\n<p>Proudov\u00fd chr\u00e1ni\u010d (RCCB) porovn\u00e1v\u00e1 proud odch\u00e1zej\u00edc\u00ed f\u00e1zov\u00fdm vodi\u010dem s proudem vracej\u00edc\u00edm se neutr\u00e1ln\u00edm vodi\u010dem.<\/p>\n<p>Za norm\u00e1ln\u00edch podm\u00ednek:<\/p>\n<ul>\n<li>proud ven = proud zp\u011bt<\/li>\n<li>magnetick\u00e1 rovnov\u00e1ha uvnit\u0159 za\u0159\u00edzen\u00ed z\u016fst\u00e1v\u00e1 stabiln\u00ed<\/li>\n<li>proudov\u00fd chr\u00e1ni\u010d (RCCB) z\u016fst\u00e1v\u00e1 sepnut\u00fd<\/li>\n<\/ul>\n<p>Za stavu zemn\u00edho svodu:<\/p>\n<ul>\n<li>\u010d\u00e1st proudu unik\u00e1 do zem\u011b po\u0161kozenou izolac\u00ed, kovov\u00fdmi kryty, vlhkost\u00ed nebo lidsk\u00fdm t\u011blem<\/li>\n<li>proud ven se ji\u017e nerovn\u00e1 proudu zp\u011bt<\/li>\n<li>proudov\u00fd chr\u00e1ni\u010d (RCCB) detekuje nerovnov\u00e1hu<\/li>\n<li>za\u0159\u00edzen\u00ed vypne a odpoj\u00ed obvod<\/li>\n<\/ul>\n<p>To je to, co odli\u0161uje proudov\u00fd chr\u00e1ni\u010d (RCCB) od standardn\u00edho nadproudov\u00e9ho jisti\u010de. Nehled\u00e1 \u201cp\u0159\u00edli\u0161 mnoho proudu\u201d v konven\u010dn\u00edm smyslu. Hled\u00e1 <strong>chyb\u011bj\u00edc\u00ed proud<\/strong> kter\u00fd se vydal necht\u011bnou cestou.<\/p>\n<p>Proto\u017ee se za\u0159\u00edzen\u00ed m\u016f\u017ee \u010dasem mechanicky nebo elektricky porouchat, z\u00e1le\u017e\u00ed na pravideln\u00e9 kontrole. Vestav\u011bn\u00e9 <code>T<\/code> nebo <code>Test<\/code> tla\u010d\u00edtko by m\u011blo b\u00fdt sou\u010d\u00e1st\u00ed b\u011b\u017en\u00e9 \u00fadr\u017eby. Jeho stisknut\u00edm se potvrd\u00ed, \u017ee za\u0159\u00edzen\u00ed m\u016f\u017ee st\u00e1le vypnout, i kdy\u017e nenahrazuje testov\u00e1n\u00ed p\u0159\u00edstrojem b\u011bhem odborn\u00e9 kontroly.<\/p>\n<p>Pro hlub\u0161\u00ed vysv\u011btlen\u00ed nebezpe\u010d\u00ed svodov\u00e9ho proudu viz <a href=\"https:\/\/test.viox.com\/cs\/understanding-ground-fault-protection\/\">Pochopen\u00ed ochrany proti zemn\u00edmu spojen\u00ed<\/a>.<\/p>\n<h2>Pro\u010d jisti\u010d (MCB) nem\u016f\u017ee chr\u00e1nit lidi p\u0159ed \u00farazem elektrick\u00fdm proudem<\/h2>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/Technical-diagram-showing-why-an-MCB-does-not-provide-personal-shock-protection.webp\" alt=\"Technical diagram showing why an MCB does not provide personal shock protection\" \/><figcaption><em>Technick\u00fd diagram vysv\u011btluj\u00edc\u00ed elektrick\u00e9 cesty a pro\u010d standardn\u00ed jisti\u010d (MCB) nem\u016f\u017ee poskytnout osobn\u00ed ochranu p\u0159ed \u00farazem elektrick\u00fdm proudem.<\/em><\/figcaption><\/figure>\n<p>Jisti\u010d (MCB) vypne, kdy\u017e proud v obvodu p\u0159ekro\u010d\u00ed jeho navr\u017een\u00fd pr\u00e1h. Osoba m\u016f\u017ee utrp\u011bt nebezpe\u010dn\u00fd nebo dokonce smrteln\u00fd \u00faraz elektrick\u00fdm proudem p\u0159i \u00farovni svodu hluboko pod proudem pot\u0159ebn\u00fdm k vypnut\u00ed typick\u00e9ho jisti\u010de (MCB). To znamen\u00e1:<\/p>\n<ul>\n<li>jisti\u010d (MCB) 6 A, 10 A, 16 A nebo 32 A m\u016f\u017ee z\u016fstat sepnut\u00fd<\/li>\n<li>poruchov\u00fd proud m\u016f\u017ee b\u00fdt st\u00e1le dostate\u010dn\u011b vysok\u00fd na to, aby zranil nebo zabil osobu<\/li>\n<li>jisti\u010d (MCB) d\u011bl\u00e1 p\u0159esn\u011b to, k \u010demu byl navr\u017een, ale typ poruchy je mimo jeho p\u016fsobnost<\/li>\n<\/ul>\n<p>To je snaz\u0161\u00ed pochopit, kdy\u017e porovn\u00e1te \u00farovn\u011b proudu lidsk\u00fdm t\u011blem s jmenovit\u00fdmi hodnotami jisti\u010de. V bezpe\u010dnostn\u00ed praxi n\u00edzk\u00e9ho nap\u011bt\u00ed, <code>50 V AC<\/code> je b\u011b\u017en\u011b pova\u017eov\u00e1no za d\u016fle\u017eitou konven\u010dn\u00ed prahovou hodnotu dotykov\u00e9ho nap\u011bt\u00ed za norm\u00e1ln\u00edch such\u00fdch podm\u00ednek, ale skute\u010dn\u00fd v\u00fdsledek \u00farazu st\u00e1le z\u00e1vis\u00ed na odporu t\u011bla, podm\u00ednk\u00e1ch kontaktu, vlhkosti poko\u017eky a cest\u011b proudu t\u011blem. Jakmile proud stoupne do des\u00edtek miliamp\u00e9r, riziko se st\u00e1v\u00e1 v\u00e1\u017en\u00fdm, i kdy\u017e je st\u00e1le nepatrn\u00e9 ve srovn\u00e1n\u00ed s jmenovit\u00fdm proudem odbo\u010dovac\u00edho jisti\u010de MCB.<\/p>\n<p>To je ochrann\u00e1 mezera:<\/p>\n<ul>\n<li>\u010dlov\u011bk m\u016f\u017ee b\u00fdt vystaven nebezpe\u010dn\u00e9mu svodov\u00e9mu proudu m\u011b\u0159en\u00e9mu v miliamp\u00e9rech<\/li>\n<li>standardn\u00ed jisti\u010d MCB \u010dek\u00e1 na poruchov\u00fd proud m\u011b\u0159en\u00fd v amp\u00e9rech<\/li>\n<li>\u00faraz elektrick\u00fdm proudem m\u016f\u017ee b\u00fdt v\u00e1\u017en\u00fd dlouho p\u0159edt\u00edm, ne\u017e jisti\u010d MCB zaznamen\u00e1 n\u011bco neobvykl\u00e9ho<\/li>\n<\/ul>\n<p>To je tak\u00e9 d\u016fvod, pro\u010d se m\u016f\u017ee zd\u00e1t, \u017ee je panel \u201cpln\u011b chr\u00e1n\u011bn\u201d, a p\u0159esto je z hlediska osobn\u00ed ochrany nebezpe\u010dn\u00fd, pokud obsahuje pouze jisti\u010de MCB.<\/p>\n<p>Pokud chcete \u0161ir\u0161\u00ed verzi tohoto t\u00e9matu zam\u011b\u0159enou na bezpe\u010dnost majitel\u016f dom\u016f, pod\u00edvejte se na <a href=\"https:\/\/test.viox.com\/cs\/why-circuit-breakers-dont-protect-people\/\">Pro\u010d jisti\u010de nechr\u00e1n\u00ed lidi<\/a>.<\/p>\n<h2>Kdy byste m\u011bli pou\u017e\u00edt proudov\u00fd chr\u00e1ni\u010d RCCB m\u00edsto jisti\u010de MCB?<\/h2>\n<p>Formulace <code>pro\u010d pou\u017e\u00edvat RCCB m\u00edsto MCB<\/code> vy\u017eaduje jednu technickou opravu: ve v\u011bt\u0161in\u011b instalac\u00ed byste nem\u011bli funkci jisti\u010de MCB zcela nahradit. M\u011bli byste p\u0159idat chyb\u011bj\u00edc\u00ed funkci ochrany proti rezidu\u00e1ln\u00edmu proudu.<\/p>\n<p>V praxi volte <code>RCCB<\/code> tam, kde je hlavn\u00edm konstruk\u010dn\u00edm hlediskem <strong>riziko \u00farazu elektrick\u00fdm proudem nebo zemn\u00ed svod<\/strong>, zejm\u00e9na v:<\/p>\n<ul>\n<li>koupeln\u00e1ch<\/li>\n<li>kuchyn\u00edch<\/li>\n<li>pr\u00e1deln\u00e1ch<\/li>\n<li>venkovn\u00edch z\u00e1suvk\u00e1ch a osv\u011btlen\u00ed<\/li>\n<li>gar\u00e1\u017e\u00edch a d\u00edln\u00e1ch<\/li>\n<li>obvodech nap\u00e1jej\u00edc\u00edch p\u0159enosn\u00e9 n\u00e1stroje<\/li>\n<li>vlhk\u00e9m nebo vodiv\u00e9m prost\u0159ed\u00ed<\/li>\n<\/ul>\n<p>Vybrat <code>MCB<\/code> tam, kde je hlavn\u00edm konstruk\u010dn\u00edm hlediskem:<\/p>\n<ul>\n<li>ochranu proti p\u0159et\u00ed\u017een\u00ed<\/li>\n<li>ochranu proti zkratu<\/li>\n<li>ochrana kabel\u016f odbo\u010dovac\u00edch obvod\u016f<\/li>\n<li>ochrana vodi\u010d\u016f a p\u0159ipojen\u00fdch z\u00e1t\u011b\u017e\u00ed proti nadm\u011brn\u00e9mu proudu<\/li>\n<\/ul>\n<p>Vybrat <strong>proudov\u00fd chr\u00e1ni\u010d (RCCB) + jisti\u010d (MCB) dohromady<\/strong> kdy\u017e pot\u0159ebujete oboj\u00ed:<\/p>\n<ul>\n<li>ochrana osob<\/li>\n<li>ochrana kabel\u016f a za\u0159\u00edzen\u00ed proti nadproudu<\/li>\n<\/ul>\n<p>Vybrat <a href=\"https:\/\/test.viox.com\/cs\/rcbo\/\">RCBO<\/a> kdy\u017e chcete ob\u011b funkce v jednom za\u0159\u00edzen\u00ed a pot\u0159ebujete:<\/p>\n<ul>\n<li>individu\u00e1ln\u00ed ochrana obvod\u016f<\/li>\n<li>men\u0161\u00ed dopad sd\u00edlen\u00e9ho vyp\u00edn\u00e1n\u00ed<\/li>\n<li>jednodu\u0161\u0161\u00ed ochrana proti rezidu\u00e1ln\u00edmu proudu pro jeden obvod<\/li>\n<\/ul>\n<p>Pokud je RCBO sou\u010d\u00e1st\u00ed va\u0161\u00ed konstruk\u010dn\u00ed cesty, pod\u00edvejte se na <a href=\"https:\/\/test.viox.com\/cs\/how-to-select-the-right-rcbo\/\">Jak vybrat spr\u00e1vn\u00fd proudov\u00fd chr\u00e1ni\u010d (RCBO)<\/a>.<\/p>\n<h2>RCCB vs MCB v re\u00e1ln\u00fdch instalac\u00edch<\/h2>\n<p>Ve v\u011bt\u0161in\u011b praktick\u00fdch rozvad\u011b\u010d\u016f vypad\u00e1 hierarchie ochrany takto:<\/p>\n<ol>\n<li>Na str\u00e1nk\u00e1ch <a href=\"https:\/\/test.viox.com\/cs\/mcb\/\">MCB<\/a> chr\u00e1n\u00ed obvod proti p\u0159et\u00ed\u017een\u00ed a zkratu.<\/li>\n<li>Na str\u00e1nk\u00e1ch <a href=\"https:\/\/test.viox.com\/cs\/rccb\/\">RCCB<\/a> monitoruje svod do zem\u011b.<\/li>\n<li>Kombinace chr\u00e1n\u00ed instalaci i u\u017eivatele.<\/li>\n<\/ol>\n<p>Proto profesion\u00e1ln\u00ed n\u00e1vrh panelu z\u0159\u00eddka formuluje rozhodnut\u00ed jako pouhou n\u00e1hradu. V ter\u00e9nn\u00edch instalac\u00edch jsou u\u017eite\u010dn\u011bj\u0161\u00ed ot\u00e1zky:<\/p>\n<ul>\n<li>Pot\u0159ebuje tento obvod osobn\u00ed ochranu proti svodu?<\/li>\n<li>Je ji\u017e p\u0159\u00edtomna nadproudov\u00e1 ochrana?<\/li>\n<li>Byl by sd\u00edlen\u00fd proudov\u00fd chr\u00e1ni\u010d RCCB p\u0159ijateln\u00fd, nebo je lep\u0161\u00ed RCBO pro ka\u017ed\u00fd obvod?<\/li>\n<li>Jak\u00e1 je vhodn\u00e1 citlivost na rezidu\u00e1ln\u00ed proud?<\/li>\n<\/ul>\n<p>To je \u00farove\u0148, kde se volba st\u00e1v\u00e1 konstruk\u010dn\u00edm rozhodnut\u00edm nam\u00edsto ot\u00e1zky slovn\u00edku.<\/p>\n<h2>RCCB + MCB vs RCBO: Vyp\u00ednac\u00ed schopnost a z\u00e1lo\u017en\u00ed ochrana<\/h2>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/Technical-diagram-comparing-RCCB-plus-MCB-with-RCBO-protection-architecture.webp\" alt=\"Technical diagram comparing RCCB plus MCB with RCBO protection architecture\" \/><figcaption><em>Srovn\u00e1vac\u00ed diagram konfigurace RCCB + MCB versus integrovan\u00e1 architektura ochrany RCBO.<\/em><\/figcaption><\/figure>\n<p>Toto je jedna z nejd\u016fle\u017eit\u011bj\u0161\u00edch kontrol n\u00e1vrhu v cel\u00e9 diskusi.<\/p>\n<p>Proudov\u00fd chr\u00e1ni\u010d RCCB je prim\u00e1rn\u011b za\u0159\u00edzen\u00ed pro ochranu proti rezidu\u00e1ln\u00edmu proudu. Nevyb\u00edr\u00e1 se stejn\u00fdm zp\u016fsobem jako nadproudov\u00e9 ochrann\u00e9 za\u0159\u00edzen\u00ed a v praktick\u00e9m n\u00e1vrhu rozvad\u011b\u010de se obvykle spol\u00e9h\u00e1 na spr\u00e1vn\u011b koordinovanou nad\u0159azenou nebo doprovodnou ochranu proti zkratu. Proto se projektant panelu nem\u016f\u017ee zastavit pouze u citlivosti na svod.<\/p>\n<p>P\u0159i hodnocen\u00ed <code>RCCB + MCB<\/code> uspo\u0159\u00e1d\u00e1n\u00ed by m\u011bli in\u017een\u00fd\u0159i ov\u011b\u0159it:<\/p>\n<ul>\n<li>potenci\u00e1ln\u00ed zkratov\u00fd proud v m\u00edst\u011b instalace<\/li>\n<li>vyp\u00ednac\u00ed schopnost <a href=\"https:\/\/test.viox.com\/cs\/mcb\/\">MCB<\/a> nebo nad\u0159azen\u00e9ho ochrann\u00e9ho za\u0159\u00edzen\u00ed<\/li>\n<li>ve\u0161ker\u00e9 po\u017eadavky na z\u00e1lo\u017en\u00ed ochranu nebo koordinaci uveden\u00e9 v\u00fdrobcem proudov\u00e9ho chr\u00e1ni\u010de RCCB<\/li>\n<li>zda je cel\u00e1 ochrann\u00e1 sestava vhodn\u00e1 pro dostupnou \u00farove\u0148 poruchy<\/li>\n<\/ul>\n<p>P\u0159i hodnocen\u00ed <a href=\"https:\/\/test.viox.com\/cs\/rcbo\/\">RCBO<\/a>, st\u00e1le plat\u00ed stejn\u00fd princip: funkce rezidu\u00e1ln\u00edho proudu m\u016f\u017ee b\u00fdt integrov\u00e1na s nadproudovou ochranou, ale schopnost za\u0159\u00edzen\u00ed vypnout zkrat mus\u00ed st\u00e1le odpov\u00eddat \u00farovni poruchy syst\u00e9mu.<\/p>\n<p>Proto se zku\u0161en\u00ed in\u017een\u00fd\u0159i nezastav\u00ed u ot\u00e1zky, zda je za\u0159\u00edzen\u00ed <code>30 mA typ A<\/code> nebo <code>30 mA typ B<\/code>. Ptaj\u00ed se tak\u00e9, zda je ochrann\u00e1 kombinace spr\u00e1vn\u00e1 pro \u00farove\u0148 poruchy v dan\u00e9m rozvad\u011b\u010di.<\/p>\n<h2>Z\u00e1klady v\u00fdb\u011bru RCCB: Citlivost, typ a po\u010det p\u00f3l\u016f<\/h2>\n<h3>Citlivost RCCB<\/h3>\n<p>Mezi b\u011b\u017en\u00e9 hodnoty citlivosti pat\u0159\u00ed:<\/p>\n<ul>\n<li><code>30 mA<\/code> pro osobn\u00ed ochranu<\/li>\n<li><code>100 mA<\/code> pro aplikace orientovan\u00e9 na p\u0159ed\u0159azen\u00e9 ji\u0161t\u011bn\u00ed nebo riziko po\u017e\u00e1ru v z\u00e1vislosti na n\u00e1vrhu syst\u00e9mu<\/li>\n<li><code>300 mA<\/code> pro vy\u0161\u0161\u00ed \u00farove\u0148 protipo\u017e\u00e1rn\u00ed ochrany, nikoli pro ochranu p\u0159ed \u00farazem elektrick\u00fdm proudem<\/li>\n<\/ul>\n<p>Pro v\u011bt\u0161inu diskus\u00ed o ochran\u011b \u017eivota, <code>30 mA<\/code> je kl\u00ed\u010dov\u00e1 hodnota. Pokud chcete podrobnou logiku dimenzov\u00e1n\u00ed, viz <a href=\"https:\/\/test.viox.com\/cs\/how-to-choose-the-right-rccb-sensitivity\/\">Jak vybrat spr\u00e1vnou citlivost proudov\u00e9ho chr\u00e1ni\u010de (RCCB)<\/a>.<\/p>\n<h3>Typ proudov\u00e9ho chr\u00e1ni\u010de<\/h3>\n<p>Na typu proudov\u00e9ho chr\u00e1ni\u010de z\u00e1le\u017e\u00ed, proto\u017ee modern\u00ed z\u00e1t\u011b\u017ee mohou generovat r\u016fzn\u00e9 pr\u016fb\u011bhy unikaj\u00edc\u00edho proudu.<\/p>\n<ul>\n<li><code>Typ AC<\/code> detekuje sinusov\u00fd st\u0159\u00eddav\u00fd zbytkov\u00fd proud<\/li>\n<li><code>Typ A<\/code> detekuje st\u0159\u00eddav\u00fd a pulzuj\u00edc\u00ed stejnosm\u011brn\u00fd zbytkov\u00fd proud<\/li>\n<li><code>Typ B<\/code> se pou\u017e\u00edv\u00e1 tam, kde se mohou vyskytovat hladk\u00e9 stejnosm\u011brn\u00e9 zbytkov\u00e9 proudy<\/li>\n<\/ul>\n<p>Pro modern\u00ed reziden\u010dn\u00ed a lehk\u00e9 komer\u010dn\u00ed z\u00e1t\u011b\u017ee je typ A \u010dasto relevantn\u011bj\u0161\u00ed z\u00e1kladn\u00ed diskus\u00ed ne\u017e typ AC.<\/p>\n<h3>Praktick\u00fd p\u0159\u00edklad v\u00fdb\u011bru typu<\/h3>\n<p>Zde se v\u00fdb\u011br st\u00e1v\u00e1 m\u00e9n\u011b teoretick\u00fdm. Ve skute\u010dn\u00fdch projektech spr\u00e1vn\u00fd typ proudov\u00e9ho chr\u00e1ni\u010de siln\u011b z\u00e1vis\u00ed na p\u0159ipojen\u00e9 z\u00e1t\u011b\u017ei.<\/p>\n<ul>\n<li>Pro standardn\u00ed reziden\u010dn\u00ed koncov\u00fd obvod nap\u00e1jej\u00edc\u00ed z\u00e1suvky, osv\u011btlen\u00ed, pra\u010dky a klimatizace s m\u011bni\u010dem, <code>Typ A<\/code> je obvykle realisti\u010dt\u011bj\u0161\u00ed v\u00fdchoz\u00ed bod, proto\u017ee mnoho modern\u00edch spot\u0159ebi\u010d\u016f obsahuje elektronick\u00e9 \u0159\u00eddic\u00ed a usm\u011br\u0148ovac\u00ed stupn\u011b.<\/li>\n<li>Pro nab\u00edje\u010dku EV, rozhran\u00ed fotovoltaick\u00e9ho m\u011bni\u010de nebo pr\u016fmyslov\u00e9 za\u0159\u00edzen\u00ed s frekven\u010dn\u00edmi m\u011bni\u010di a slo\u017eit\u011bj\u0161\u00ed v\u00fdkonovou elektronikou se ot\u00e1zka pr\u016fb\u011bhu zbytkov\u00e9ho proudu st\u00e1v\u00e1 n\u00e1ro\u010dn\u011bj\u0161\u00ed. V z\u00e1vislosti na konstrukci nab\u00edje\u010dky nebo pohonu, <code>Typ B<\/code> za\u0159\u00edzen\u00ed nebo uspo\u0159\u00e1d\u00e1n\u00ed zalo\u017een\u00e9 na typu A s dodate\u010dnou ochranou proti stejnosm\u011brn\u00e9mu zbytkov\u00e9mu proudu zabudovanou do za\u0159\u00edzen\u00ed m\u016f\u017ee b\u00fdt vy\u017eadov\u00e1no n\u00e1vrhem aplikace a platn\u00fdmi normami.<\/li>\n<\/ul>\n<p>To je zvl\u00e1\u0161t\u011b d\u016fle\u017eit\u00e9 p\u0159i nab\u00edjen\u00ed EV. V r\u00e1mci IEC 60364-7-722 m\u016f\u017ee b\u00fdt nab\u00edjec\u00ed bod chr\u00e1n\u011bn p\u0159ed\u0159azen\u00fdm <code>Typ A<\/code> za\u0159\u00edzen\u00edm, pokud EVSE ji\u017e poskytuje <code>6 mA DC<\/code> detekci zbytkov\u00e9ho proudu prost\u0159ednictv\u00edm funkce RDC-DD vyhovuj\u00edc\u00ed norm\u011b IEC 62955. To m\u016f\u017ee b\u00fdt smyslupln\u00e1 optimalizace n\u00e1klad\u016f ve srovn\u00e1n\u00ed se specifikac\u00ed typu B v\u0161ude. Pokud v\u0161ak tato vestav\u011bn\u00e1 detekce 6 mA DC nen\u00ed p\u0159\u00edtomna, nebo pokud dokumentace za\u0159\u00edzen\u00ed vy\u017eaduje jin\u00e9 ochrann\u00e9 uspo\u0159\u00e1d\u00e1n\u00ed, strategie p\u0159ed\u0159azen\u00e9ho za\u0159\u00edzen\u00ed se mus\u00ed odpov\u00eddaj\u00edc\u00edm zp\u016fsobem zm\u011bnit.<\/p>\n<p>V praxi je to d\u016fvod, pro\u010d by in\u017een\u00fd\u0159i nem\u011bli vyb\u00edrat typ RCCB pouze podle ceny. Z\u00e1kladn\u00ed za\u0159\u00edzen\u00ed typu AC m\u016f\u017ee vypadat na pap\u00ed\u0159e p\u0159ijateln\u011b, ale m\u016f\u017ee to b\u00fdt \u0161patn\u00e1 volba pro obvod obsluhuj\u00edc\u00ed modern\u00ed elektronick\u00e9 z\u00e1t\u011b\u017ee. Pokud obvod zahrnuje nab\u00edjen\u00ed EV, sol\u00e1rn\u00ed konverzi nebo pokro\u010dil\u00e9 \u0159\u00edzen\u00ed motoru, v\u017edy ov\u011b\u0159te po\u017eadavek na za\u0159\u00edzen\u00ed podle pokyn\u016f v\u00fdrobce za\u0159\u00edzen\u00ed a p\u0159\u00edslu\u0161n\u00e9 instala\u010dn\u00ed normy.<\/p>\n<h3>Konfigurace p\u00f3l\u016f<\/h3>\n<ul>\n<li><code>2-p\u00f3lov\u00fd RCCB<\/code> se typicky pou\u017e\u00edv\u00e1 v jednof\u00e1zov\u00fdch syst\u00e9mech<\/li>\n<li><code>4-p\u00f3lov\u00fd RCCB<\/code> se pou\u017e\u00edv\u00e1 v t\u0159\u00edf\u00e1zov\u00fdch syst\u00e9mech s monitorov\u00e1n\u00edm neutr\u00e1lu podle po\u017eadavk\u016f n\u00e1vrhu instalace<\/li>\n<\/ul>\n<p>V\u00fdb\u011br spr\u00e1vn\u00e9ho po\u010dtu p\u00f3l\u016f je d\u016fle\u017eit\u00fd, proto\u017ee v\u0161echny monitorovan\u00e9 vodi\u010de vedouc\u00ed proud mus\u00ed proch\u00e1zet cestou sn\u00edm\u00e1n\u00ed zbytkov\u00e9ho proudu.<\/p>\n<h2>Rozd\u00edl mezi MCB a RCB<\/h2>\n<p>Na mnoha trz\u00edch, <code>RCB<\/code> se pou\u017e\u00edv\u00e1 jako voln\u00e1 zkratka pro ochrann\u00e9 za\u0159\u00edzen\u00ed proti zbytkov\u00e9mu proudu. Technicky v\u0161ak m\u016f\u017ee b\u00fdt tento term\u00edn \u0161ir\u0161\u00ed a m\u00e9n\u011b p\u0159esn\u00fd ne\u017e <code>RCCB<\/code>.<\/p>\n<p>Pro praktick\u00fd n\u00e1kup a v\u00fdb\u011br:<\/p>\n<ul>\n<li><code>MCB<\/code> = pouze nadproudov\u00e1 ochrana<\/li>\n<li><code>RCB<\/code> nebo <code>proudov\u00fd chr\u00e1ni\u010d (RCD)<\/code> = rodina ochrany proti zbytkov\u00e9mu proudu<\/li>\n<li><code>RCCB<\/code> = za\u0159\u00edzen\u00ed pro ochranu proti zbytkov\u00e9mu proudu bez integrovan\u00e9 nadproudov\u00e9 ochrany<\/li>\n<li><code>RCBO<\/code> = ochrana proti zbytkov\u00e9mu proudu + nadproudov\u00e1 ochrana v jedn\u00e9 jednotce<\/li>\n<\/ul>\n<p>Tak\u017ee pokud se n\u011bkdo zept\u00e1 na <code>rozd\u00edl mezi MCB a RCB<\/code>, praktick\u00e1 odpov\u011b\u010f je:<\/p>\n<p><strong>MCB chr\u00e1n\u00ed proti p\u0159et\u00ed\u017een\u00ed a zkratu; za\u0159\u00edzen\u00ed z rodiny RCB chr\u00e1n\u00ed proti poruch\u00e1m unikaj\u00edc\u00edho proudu a riziku \u00farazu elektrick\u00fdm proudem.<\/strong><\/p>\n<p>Pro rozpis na \u00farovni term\u00edn\u016f viz <a href=\"https:\/\/test.viox.com\/cs\/rcb-full-form-residual-current-breaker\/\">RCB Full Form in Electrical: Jisti\u010d zbytkov\u00e9ho proudu<\/a> a <a href=\"https:\/\/test.viox.com\/cs\/rccb-full-form-understanding-residual-current-circuit-breakers\/\">\u00dapln\u00fd formul\u00e1\u0159 RCCB: Rozum\u00edme zbytkov\u00fdm proudov\u00fdm chr\u00e1ni\u010d\u016fm<\/a>.<\/p>\n<h2>RCCB vs MCB vs RCBO<\/h2>\n<p>Jakmile projekt p\u0159ekro\u010d\u00ed z\u00e1kladn\u00ed pov\u011bdom\u00ed, mnoho in\u017een\u00fdr\u016f a kupuj\u00edc\u00edch se p\u0159estane pt\u00e1t <code>RCCB vs MCB<\/code> a za\u010dne se pt\u00e1t, zda je RCBO lep\u0161\u00ed architektura.<\/p>\n<table style=\"border-collapse: collapse; width: 100%; text-align: left;\" border=\"1\">\n<thead>\n<tr>\n<th style=\"padding: 8px;\">Za\u0159\u00edzen\u00ed<\/th>\n<th style=\"padding: 8px;\">Ochrana proti p\u0159et\u00ed\u017een\u00ed<\/th>\n<th style=\"padding: 8px;\">Ochrana proti zkratu<\/th>\n<th style=\"padding: 8px;\">Ochrana proti zemn\u00edmu \u00faniku<\/th>\n<th style=\"padding: 8px;\">Typick\u00fd p\u0159\u00edpad pou\u017eit\u00ed<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding: 8px;\">MCB<\/td>\n<td style=\"padding: 8px;\">Ano<\/td>\n<td style=\"padding: 8px;\">Ano<\/td>\n<td style=\"padding: 8px;\">Ne<\/td>\n<td style=\"padding: 8px;\">Standardn\u00ed nadproudov\u00e1 ochrana odbo\u010dkov\u00e9ho obvodu<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\">RCCB<\/td>\n<td style=\"padding: 8px;\">Ne<\/td>\n<td style=\"padding: 8px;\">Ne<\/td>\n<td style=\"padding: 8px;\">Ano<\/td>\n<td style=\"padding: 8px;\">Sd\u00edlen\u00e1 ochrana proti \u00faniku se samostatn\u00fdmi MCB<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\">RCBO<\/td>\n<td style=\"padding: 8px;\">Ano<\/td>\n<td style=\"padding: 8px;\">Ano<\/td>\n<td style=\"padding: 8px;\">Ano<\/td>\n<td style=\"padding: 8px;\">Individu\u00e1ln\u00ed ochrana obvodu s kombinovanou funk\u010dnost\u00ed<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Pokud z\u00e1le\u017e\u00ed na prostoru panelu, izolaci proti ne\u017e\u00e1douc\u00edmu vypnut\u00ed a selektivit\u011b pro ka\u017ed\u00fd obvod, <a href=\"https:\/\/test.viox.com\/cs\/rcbo\/\">RCBO<\/a> se \u010dasto st\u00e1v\u00e1 lep\u0161\u00ed in\u017een\u00fdrskou odpov\u011bd\u00ed.<\/p>\n<p>Pro hlub\u0161\u00ed architektonick\u00e9 srovn\u00e1n\u00ed viz <a href=\"https:\/\/test.viox.com\/cs\/rcbo-vs-rccb-mcb-comparison-space-cost-selectivity\/\">RCBO vs RCCB + MCB: Srovn\u00e1n\u00ed prostoru, n\u00e1klad\u016f a selektivity<\/a>.<\/p>\n<h2>B\u011b\u017en\u00e9 chyby p\u0159i v\u00fdb\u011bru mezi RCCB a MCB<\/h2>\n<h3>1. Pou\u017eit\u00ed samotn\u00e9ho MCB tam, kde je vy\u017eadov\u00e1na ochrana p\u0159ed \u00farazem elektrick\u00fdm proudem<\/h3>\n<p>Toto je nej\u010dast\u011bj\u0161\u00ed koncep\u010dn\u00ed chyba. Ochrana pouze MCB je ne\u00fapln\u00e1 ve vlhk\u00fdch, venkovn\u00edch nebo vysoce dotykov\u00fdch obvodech, kde se o\u010dek\u00e1v\u00e1 ochrana proti zbytkov\u00e9mu proudu.<\/p>\n<h3>2. P\u0159edpoklad, \u017ee RCCB nahrazuje nadproudovou ochranu<\/h3>\n<p>RCCB nenahrazuje nadproudovou funkci MCB. Pokud instalujete pouze RCCB bez \u0159\u00e1dn\u00e9 p\u0159ed\u0159azen\u00e9 nebo koordinovan\u00e9 nadproudov\u00e9 ochrany, instalace je ne\u00fapln\u00e1.<\/p>\n<h3>3. V\u00fdb\u011br nespr\u00e1vn\u00e9 citlivosti RCCB<\/h3>\n<p>P\u0159\u00edli\u0161 vysok\u00e1 prahov\u00e1 hodnota zbytkov\u00e9ho proudu nemus\u00ed zajistit zam\u00fd\u0161lenou osobn\u00ed ochranu. P\u0159\u00edli\u0161 n\u00edzk\u00e1 m\u016f\u017ee zp\u016fsobit ne\u017e\u00e1douc\u00ed vypnut\u00ed, pokud je aplikace nevhodn\u00e1.<\/p>\n<h3>4. Ignorov\u00e1n\u00ed typu za\u0159\u00edzen\u00ed<\/h3>\n<p>Z\u00e1t\u011b\u017ee s elektronickou konverz\u00ed energie mohou zm\u011bnit po\u017eadovan\u00fd typ za\u0159\u00edzen\u00ed pro zbytkov\u00fd proud. To je jeden z d\u016fvod\u016f, pro\u010d star\u0161\u00ed <code>Typ AC<\/code> p\u0159edpoklady ji\u017e nevyhovuj\u00ed ka\u017ed\u00e9 modern\u00ed z\u00e1t\u011b\u017ei.<\/p>\n<h3>5. Ignorov\u00e1n\u00ed koordinace zkratu a z\u00e1lo\u017en\u00ed ochrany<\/h3>\n<p>Nesta\u010d\u00ed vybrat spr\u00e1vnou funkci \u00faniku. Ochrann\u00e9 uspo\u0159\u00e1d\u00e1n\u00ed mus\u00ed b\u00fdt tak\u00e9 vhodn\u00e9 pro dostupn\u00fd poruchov\u00fd proud v dan\u00e9m bod\u011b syst\u00e9mu.<\/p>\n<h3>6. M\u00edch\u00e1n\u00ed terminologie bez objasn\u011bn\u00ed funkce za\u0159\u00edzen\u00ed<\/h3>\n<p>U\u017eivatel\u00e9 \u010dasto \u0159\u00edkaj\u00ed <code>RCB<\/code>, <code>proudov\u00fd chr\u00e1ni\u010d (RCD)<\/code>a <code>RCCB<\/code> zam\u011bniteln\u011b. To je b\u011b\u017en\u00e9 v konverzaci, ale pro specifikaci a n\u00e1kup z\u00e1le\u017e\u00ed na p\u0159esn\u00e9m typu za\u0159\u00edzen\u00ed.<\/p>\n<h2>Doporu\u010den\u00e1 strategie ochrany<\/h2>\n<p>Pokud chcete nejkrat\u0161\u00ed technicky spr\u00e1vn\u00e9 doporu\u010den\u00ed, je to toto:<\/p>\n<ul>\n<li>pou\u017eijte <a href=\"https:\/\/test.viox.com\/cs\/mcb\/\">MCB<\/a> pro ochranu proti p\u0159et\u00ed\u017een\u00ed a zkratu<\/li>\n<li>pou\u017eijte <a href=\"https:\/\/test.viox.com\/cs\/rccb\/\">RCCB<\/a> tam, kde je vy\u017eadov\u00e1na ochrana proti zemn\u00edmu \u00faniku a ochrana osob<\/li>\n<li>pou\u017eijte <a href=\"https:\/\/test.viox.com\/cs\/rcbo\/\">RCBO<\/a> tam, kde chcete oboj\u00ed v jednom za\u0159\u00edzen\u00ed<\/li>\n<\/ul>\n<p>To je praktick\u00e1 odpov\u011b\u010f, kter\u00e1 stoj\u00ed za v\u011bt\u0161inou diskus\u00ed o v\u00fdb\u011bru v ter\u00e9nu na toto t\u00e9ma.<\/p>\n<h2>\u010casto Kladen\u00e9 Ot\u00e1zky<\/h2>\n<h3>Jak\u00fd je hlavn\u00ed rozd\u00edl mezi proudov\u00fdm chr\u00e1ni\u010dem (RCCB) a jisti\u010dem (MCB)?<\/h3>\n<p>Hlavn\u00ed rozd\u00edl spo\u010d\u00edv\u00e1 v typu poruchy, kterou detekuj\u00ed. RCCB detekuje nerovnov\u00e1hu zemn\u00edho svodu, zat\u00edmco MCB detekuje p\u0159et\u00ed\u017een\u00ed a zkratov\u00fd proud.<\/p>\n<h3>Jak\u00e1 je funkce proudov\u00e9ho chr\u00e1ni\u010de (RCCB)?<\/h3>\n<p>Hlavn\u00edm \u00fakolem proudov\u00e9ho chr\u00e1ni\u010de (RCCB) je detekovat svodov\u00fd proud z ur\u010den\u00e9 cesty obvodu do zem\u011b a odpojit obvod d\u0159\u00edve, ne\u017e se tento svod stane v\u00e1\u017en\u00fdm \u00farazem elektrick\u00fdm proudem nebo po\u017e\u00e1rn\u00edm nebezpe\u010d\u00edm.<\/p>\n<h3>M\u016f\u017ee proudov\u00fd chr\u00e1ni\u010d (RCCB) nahradit jisti\u010d (MCB)?<\/h3>\n<p>Samotn\u00fd o sob\u011b ne. RCCB neposkytuje standardn\u00ed nadproudovou ochranu. Ve v\u011bt\u0161in\u011b instalac\u00ed mus\u00ed RCCB pracovat s MCB, nebo byste m\u011bli pou\u017e\u00edt RCBO.<\/p>\n<h3>Je RCCB lep\u0161\u00ed ne\u017e MCB?<\/h3>\n<p>Ne v obecn\u00e9m smyslu. RCCB je lep\u0161\u00ed pro ochranu proti \u00faniku proudu a \u00farazu elektrick\u00fdm proudem. MCB je lep\u0161\u00ed pro ochranu proti p\u0159et\u00ed\u017een\u00ed a zkratu. \u0158e\u0161\u00ed r\u016fzn\u00e9 probl\u00e9my.<\/p>\n<h3>Jak\u00fd je rozd\u00edl mezi MCB a RCB?<\/h3>\n<p>MCB chr\u00e1n\u00ed proti nadproudov\u00fdm poruch\u00e1m. Za\u0159\u00edzen\u00ed typu RCB chr\u00e1n\u00ed proti rezidu\u00e1ln\u00edm proud\u016fm nebo svodov\u00fdm poruch\u00e1m. V praxi mnoho u\u017eivatel\u016f mysl\u00ed RCCB, kdy\u017e \u0159\u00edkaj\u00ed RCB.<\/p>\n<h3>Pro\u010d vybavuje m\u016fj proudov\u00fd chr\u00e1ni\u010d (RCCB), ale jisti\u010d (MCB) ne?<\/h3>\n<p>To obvykle znamen\u00e1, \u017ee porucha je svod do zem\u011b, sp\u00ed\u0161e ne\u017e p\u0159et\u00ed\u017een\u00ed nebo zkrat. Proudov\u00fd chr\u00e1ni\u010d (RCCB) detekuje nerovnov\u00e1hu, zat\u00edmco jisti\u010d (MCB) nezaznamen\u00e1v\u00e1 dostate\u010dn\u00fd nadproud k vypnut\u00ed.<\/p>\n<h3>M\u00e1m pro koncov\u00fd obvod pou\u017e\u00edt proudov\u00fd chr\u00e1ni\u010d (RCCB) nebo jisti\u010d s proudov\u00fdm chr\u00e1ni\u010dem (RCBO)?<\/h3>\n<p>Pokud po\u017eadujete kombinovanou nadproudovou a svodovou ochranu v jednom obvodu, RCBO je \u010dasto elegantn\u011bj\u0161\u00ed \u0159e\u0161en\u00ed. Pokud n\u00e1vrh pou\u017e\u00edv\u00e1 sd\u00edlenou ochranu proti rezidu\u00e1ln\u00edmu proudu se samostatn\u00fdmi nadproudov\u00fdmi prvky, RCCB + MCB m\u016f\u017ee b\u00fdt st\u00e1le vhodnou volbou.<\/p>\n<h2>Z\u00e1v\u011br<\/h2>\n<p>Pokud je va\u0161e ot\u00e1zka <code>pro\u010d pou\u017e\u00edvat RCCB m\u00edsto MCB<\/code>, technicky spr\u00e1vn\u00e1 odpov\u011b\u010f je:<\/p>\n<p><strong>Pou\u017eijte RCCB tam, kde pot\u0159ebujete ochranu proti \u00farazu elektrick\u00fdm proudem a zemn\u00edmu \u00faniku. Pou\u017eijte MCB tam, kde pot\u0159ebujete ochranu proti p\u0159et\u00ed\u017een\u00ed a zkratu. Ve v\u011bt\u0161in\u011b praktick\u00fdch syst\u00e9m\u016f pou\u017e\u00edvejte oboj\u00ed spole\u010dn\u011b, nebo pou\u017eijte RCBO, kdy\u017e chcete ob\u011b funkce v jednom za\u0159\u00edzen\u00ed.<\/strong><\/p>\n<p>To je tak\u00e9 nej\u010dist\u0161\u00ed zp\u016fsob, jak pochopit:<\/p>\n<ul>\n<li><code>rccb vs mcb<\/code><\/li>\n<li><code>rozd\u00edl mezi rccb a mcb<\/code><\/li>\n<li><code>funkce rccb<\/code><\/li>\n<li><code>jisti\u010d rccb<\/code><\/li>\n<li><code>rozd\u00edl mezi mcb a rcb<\/code><\/li>\n<\/ul>\n<p>Tyto rozd\u00edly jsou d\u016fle\u017eit\u00e9 p\u0159i skute\u010dn\u00e9m v\u00fdb\u011bru, proto\u017ee ochrana proti \u00faniku, nadproudov\u00e1 ochrana a koordinace \u00farovn\u011b poruchy mus\u00ed b\u00fdt spr\u00e1vn\u00e9 sou\u010dasn\u011b.<\/p>\n<\/div>\n<div class=\"simg-pop-btn\" style=\"top: 5528.53px; left: 14px; display: none;\"><\/div>\n<div class=\"simg-pop-btn\" style=\"top: 5528.53px; left: 14px; display: none;\"><\/div>","protected":false},"excerpt":{"rendered":"<p>Direct Answer You do not use an RCCB instead of an MCB for every purpose. You use an RCCB when you need electric shock and earth-leakage protection, and you use an MCB when you need overload and short-circuit protection. In most real installations, the correct answer is not RCCB or MCB, but RCCB + MCB [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":18938,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-18935","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/test.viox.com\/cs\/wp-json\/wp\/v2\/posts\/18935","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/test.viox.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/test.viox.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/test.viox.com\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/test.viox.com\/cs\/wp-json\/wp\/v2\/comments?post=18935"}],"version-history":[{"count":1,"href":"https:\/\/test.viox.com\/cs\/wp-json\/wp\/v2\/posts\/18935\/revisions"}],"predecessor-version":[{"id":23286,"href":"https:\/\/test.viox.com\/cs\/wp-json\/wp\/v2\/posts\/18935\/revisions\/23286"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/test.viox.com\/cs\/wp-json\/wp\/v2\/media\/18938"}],"wp:attachment":[{"href":"https:\/\/test.viox.com\/cs\/wp-json\/wp\/v2\/media?parent=18935"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/test.viox.com\/cs\/wp-json\/wp\/v2\/categories?post=18935"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/test.viox.com\/cs\/wp-json\/wp\/v2\/tags?post=18935"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}