{"id":21292,"date":"2026-01-16T11:27:48","date_gmt":"2026-01-16T03:27:48","guid":{"rendered":"https:\/\/viox.com\/?p=21292"},"modified":"2026-01-16T11:27:50","modified_gmt":"2026-01-16T03:27:50","slug":"ev-charger-rcd-selection-type-b-vs-type-f-vs-type-ev-iec-62955-iec-62423","status":"publish","type":"post","link":"https:\/\/test.viox.com\/cs\/ev-charger-rcd-selection-type-b-vs-type-f-vs-type-ev-iec-62955-iec-62423\/","title":{"rendered":"V\u00fdb\u011br proudov\u00e9ho chr\u00e1ni\u010de pro nab\u00edje\u010dku elektromobil\u016f: Typ B vs. Typ F vs. Typ EV (IEC 62955 &amp; IEC 62423)"},"content":{"rendered":"<div class=\"product-intro\">\n<p>Pro elektrotechniky a instala\u010dn\u00ed techniky p\u0159edstavuje rychl\u00fd rozvoj infrastruktury pro elektromobily (EV) specifickou v\u00fdzvu v oblasti ochrany: <strong>Stejnosm\u011brn\u00e9 poruchov\u00e9 proudy<\/strong>. Na rozd\u00edl od standardn\u00edch spot\u0159ebi\u010d\u016f pro dom\u00e1cnost mohou usm\u011br\u0148ovac\u00ed obvody v palubn\u00edch nab\u00edje\u010dk\u00e1ch elektromobil\u016f (OBC) generovat hladk\u00e9 stejnosm\u011brn\u00e9 svodov\u00e9 proudy v p\u0159\u00edpad\u011b poruchy.<\/p>\n<p>Pokud nejsou tyto stejnosm\u011brn\u00e9 proudy \u0159\u00e1dn\u011b izolov\u00e1ny, mohou \"oslepit\" proudov\u00e9 chr\u00e1ni\u010de typu A (RCD) um\u00edst\u011bn\u00e9 v\u00fd\u0161e v obvodu, \u010d\u00edm\u017e se cel\u00e1 elektrick\u00e1 instalace stane nebezpe\u010dnou.<\/p>\n<p>Tato technick\u00e1 p\u0159\u00edru\u010dka analyzuje t\u0159i vyhovuj\u00edc\u00ed strategie ochrany definovan\u00e9 normou <strong>IEC 60364-7-722<\/strong> a <strong>IEC 61851-1<\/strong>: pou\u017eit\u00ed proudov\u00e9ho chr\u00e1ni\u010de typu B, proudov\u00e9ho chr\u00e1ni\u010de typu F (za specifick\u00fdch podm\u00ednek) nebo nov\u011bj\u0161\u00edho p\u0159\u00edstupu \u201ctypu EV\u201d (RDC-DD). Prozkoum\u00e1me technick\u00e9 rozd\u00edly mezi <strong>IEC 62423<\/strong> a <strong>IEC 62955<\/strong> abychom ur\u010dili optim\u00e1ln\u00ed volbu pro bezpe\u010dnost, shodu s p\u0159edpisy a n\u00e1kladovou efektivitu.<\/p>\n<h2>Efekt \u201coslepen\u00ed\u201d: Pro\u010d typ A nesta\u010d\u00ed<\/h2>\n<p>Z\u00e1sadn\u00edm probl\u00e9mem v ochran\u011b elektromobil\u016f je magnetick\u00e1 saturace sn\u00edmac\u00edho j\u00e1dra ve standardn\u00edch proudov\u00fdch chr\u00e1ni\u010d\u00edch. Standardn\u00ed <strong>RCD typu A<\/strong> (b\u011b\u017en\u011b pou\u017e\u00edvan\u00fd v obytn\u00fdch a komer\u010dn\u00edch obvodech) pou\u017e\u00edv\u00e1 toroidn\u00ed transform\u00e1tor optimalizovan\u00fd pro 50\/60 Hz AC a pulzuj\u00edc\u00ed DC.<\/p>\n<p>Kdy\u017e <strong>hladk\u00fd stejnosm\u011brn\u00fd proud<\/strong> (stejnosm\u011brn\u00fd proud s m\u00e9n\u011b ne\u017e 10% zvln\u011bn\u00edm) prot\u00e9k\u00e1 t\u00edmto toroidem, vytv\u00e1\u0159\u00ed konstantn\u00ed magnetick\u00fd tok. Pokud toto stejnosm\u011brn\u00e9 svodov\u00e9 nap\u011bt\u00ed p\u0159ekro\u010d\u00ed <strong>6mA<\/strong>, m\u016f\u017ee posunout pracovn\u00ed bod magnetick\u00e9ho j\u00e1dra do saturace. Jakmile je j\u00e1dro nasycen\u00e9, nem\u016f\u017ee detekovat st\u0159\u00eddav\u00e9 magnetick\u00e9 pole generovan\u00e9 \u017eivot ohro\u017euj\u00edc\u00edm st\u0159\u00eddav\u00fdm zemn\u00edm spojen\u00edm. Proudov\u00fd chr\u00e1ni\u010d se stane \u201cslep\u00fdm\u201d a nevypne, tak\u017ee u\u017eivatel\u00e9 nebudou chr\u00e1n\u011bni p\u0159ed \u00farazem elektrick\u00fdm proudem.<\/p>\n<p>Proto mezin\u00e1rodn\u00ed normy na\u0159izuj\u00ed, aby ka\u017ed\u00fd nab\u00edjec\u00ed bod pro elektromobily byl chr\u00e1n\u011bn za\u0159\u00edzen\u00edm, kter\u00e9 odpoj\u00ed nap\u00e1jen\u00ed v p\u0159\u00edpad\u011b stejnosm\u011brn\u00e9ho poruchov\u00e9ho proudu \u2265 6 mA.<\/p>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto; display: block; margin: 0 auto;\" src=\"https:\/\/img.viox.com\/Type-B-RCD-Product-Shot.webp\" alt=\"VIOX Type B Circuit Breaker (RCCB) IEC 62423 for EV protection\" \/><figcaption style=\"font-style: italic; text-align: center; color: #555; margin-top: 8px;\">Proudov\u00fd chr\u00e1ni\u010d VIOX typu B (IEC 62423) je navr\u017een pro detekci st\u0159\u00eddav\u00fdch, pulzuj\u00edc\u00edch stejnosm\u011brn\u00fdch a hladk\u00fdch stejnosm\u011brn\u00fdch rezidu\u00e1ln\u00edch proud\u016f.<\/figcaption><\/figure>\n<h2>Definov\u00e1n\u00ed konkurent\u016f: Typ B vs. Typ F vs. Typ EV<\/h2>\n<h3>1. Proudov\u00fd chr\u00e1ni\u010d typu B (IEC 62423)<\/h3>\n<p>Na str\u00e1nk\u00e1ch <strong>RCD typu B<\/strong> je nejrobustn\u011bj\u0161\u00ed \u0159e\u0161en\u00ed. Obsahuje dva detek\u010dn\u00ed syst\u00e9my: standardn\u00ed fluxgate pro AC\/pulzuj\u00edc\u00ed DC a samostatn\u00fd vysokofrekven\u010dn\u00ed elektronick\u00fd detek\u010dn\u00ed obvod pro hladk\u00fd DC.<\/p>\n<ul>\n<li><strong>Schopnosti:<\/strong> Detekuje sinusov\u00e9 AC, pulzuj\u00edc\u00ed DC a <strong>hladk\u00e9 DC<\/strong> rezidu\u00e1ln\u00ed proudy. Detekuje tak\u00e9 proudy o frekvenc\u00edch a\u017e 1000 Hz (kritick\u00e9 pro detekci svodov\u00fdch proud\u016f sp\u00ednac\u00ed frekvence z m\u011bni\u010d\u016f).<\/li>\n<li><strong>Vyp\u00ednac\u00ed prah:<\/strong> Typicky <strong>30 mA AC<\/strong> a <strong>60 mA DC<\/strong>. (Pozn\u00e1mka: Zat\u00edmco norma povoluje a\u017e 2x I\u0394n pro DC, jisti\u010de VIOX typu B \u010dasto vyp\u00ednaj\u00ed d\u0159\u00edve pro zv\u00fd\u0161en\u00ed bezpe\u010dnosti).<\/li>\n<li><strong>Pou\u017eit\u00ed:<\/strong> Vy\u017eaduje se pro t\u0159\u00edf\u00e1zov\u00e9 nab\u00edje\u010dky, kde m\u016f\u017ee b\u00fdt stejnosm\u011brn\u00fd svodov\u00fd proud hladk\u00fd, a pro instalace vy\u017eaduj\u00edc\u00ed maxim\u00e1ln\u00ed dobu provozuschopnosti a selektivitu.<\/li>\n<\/ul>\n<h3>2. Proudov\u00fd chr\u00e1ni\u010d typu F (IEC 62423)<\/h3>\n<p>Na str\u00e1nk\u00e1ch <strong>Proudov\u00fd chr\u00e1ni\u010d typu F<\/strong> je vylep\u0161en\u00fd typ A. Nab\u00edz\u00ed lep\u0161\u00ed odolnost proti ne\u017e\u00e1douc\u00edmu vyp\u00edn\u00e1n\u00ed od r\u00e1zov\u00fdch proud\u016f a dok\u00e1\u017ee detekovat rezidu\u00e1ln\u00ed proudy se sm\u00ed\u0161en\u00fdmi frekvencemi (a\u017e 1 kHz).<\/p>\n<ul>\n<li><strong>Omezen\u00ed:<\/strong> Z\u00e1sadn\u00ed je, \u017ee, <strong>Typ F nedetekuje hladk\u00fd DC<\/strong>.<\/li>\n<li><strong>Aplikace EV:<\/strong> Pou\u017e\u00edv\u00e1te <strong>nem\u016f\u017ee<\/strong> pou\u017eijte pro nab\u00edjen\u00ed EV samotn\u00fd proudov\u00fd chr\u00e1ni\u010d typu F. Mus\u00ed b\u00fdt sp\u00e1rov\u00e1n s <strong>RDC-DD<\/strong> (Za\u0159\u00edzen\u00ed pro detekci rezidu\u00e1ln\u00edho stejnosm\u011brn\u00e9ho proudu), kter\u00e9 zpracov\u00e1v\u00e1 detekci 6mA DC.<\/li>\n<\/ul>\n<h3>3. Typ EV \/ RDC-DD (IEC 62955)<\/h3>\n<p>\u010casto se prod\u00e1v\u00e1 jako \u201cTyp EV\u201d, ale technicky se jedn\u00e1 o <strong>Za\u0159\u00edzen\u00ed pro detekci rezidu\u00e1ln\u00edho stejnosm\u011brn\u00e9ho proudu (RDC-DD)<\/strong>. Je speci\u00e1ln\u011b navr\u017een tak, aby zabr\u00e1nil \"oslepen\u00ed\" proudov\u00fdch chr\u00e1ni\u010d\u016f typu A um\u00edst\u011bn\u00fdch v\u00fd\u0161e v obvodu.<\/p>\n<ul>\n<li><strong>Funkce:<\/strong> Monitoruje obvod pro hladk\u00fd stejnosm\u011brn\u00fd svodov\u00fd proud.<\/li>\n<li><strong>Prah:<\/strong> Aby <strong>mus\u00ed vypnout p\u0159i 6 mA DC<\/strong>.<\/li>\n<li><strong>Normy:<\/strong> \u0158\u00edd\u00ed se <strong>IEC 62955<\/strong>.<\/li>\n<li><strong>Varianty:<\/strong>\n<ul>\n<li><strong>RDC-MD (Monitorovac\u00ed za\u0159\u00edzen\u00ed):<\/strong> Detekuje svod a signalizuje kontaktoru nab\u00edje\u010dky EV, aby se otev\u0159el. Pokud se kontakty kontaktoru sva\u0159\u00ed, ochrana sel\u017ee.<\/li>\n<li><strong>RDC-PD (Ochrann\u00e9 za\u0159\u00edzen\u00ed):<\/strong> Obsahuje vlastn\u00ed mechanismus odpojen\u00ed (podobn\u00fd jisti\u010di).<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>Pro hlub\u0161\u00ed pochopen\u00ed toho, jak tato za\u0159\u00edzen\u00ed zapadaj\u00ed do \u0161ir\u0161\u00edch komer\u010dn\u00edch syst\u00e9m\u016f, si p\u0159e\u010dt\u011bte na\u0161i p\u0159\u00edru\u010dku o <a href=\"https:\/\/test.viox.com\/cs\/commercial-ev-charging-protection-guide-acb-mccb-rcbo\/\">Komer\u010dn\u00ed ochrana nab\u00edjen\u00ed EV<\/a>.<\/p>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto; display: block; margin: 0 auto;\" src=\"https:\/\/img.viox.com\/Technical-Diagram---DC-Blinding-Effect.webp\" alt=\"Technical schematic diagram illustrating the Blinding Effect in a transformer core\" \/><figcaption style=\"font-style: italic; text-align: center; color: #555; margin-top: 8px;\">Technick\u00e9 sch\u00e9ma: Jak stejnosm\u011brn\u00e9 p\u0159edp\u011bt\u00ed (&gt;6mA) posouv\u00e1 magnetick\u00e9 j\u00e1dro do saturace a zp\u016fsobuje \u201cefekt oslepen\u00ed\u201d.<\/figcaption><\/figure>\n<h2>Matice technick\u00e9ho srovn\u00e1n\u00ed<\/h2>\n<p>N\u00e1sleduj\u00edc\u00ed tabulka shrnuje detek\u010dn\u00ed schopnosti a shodu s normami pro ka\u017ed\u00fd typ za\u0159\u00edzen\u00ed.<\/p>\n<table style=\"border-collapse: collapse; width: 100%; margin-bottom: 20px;\" border=\"1\">\n<thead style=\"background-color: #f2f2f2;\">\n<tr>\n<th style=\"padding: 10px;\">Funkce<\/th>\n<th style=\"padding: 10px;\">RCD typu A<\/th>\n<th style=\"padding: 10px;\">Proudov\u00fd chr\u00e1ni\u010d typu F<\/th>\n<th style=\"padding: 10px;\">RCD typu B<\/th>\n<th style=\"padding: 10px;\">RDC-DD (Typ EV)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding: 10px;\"><strong>Standardn\u00ed<\/strong><\/td>\n<td style=\"padding: 10px;\">IEC 61008 \/ 61009<\/td>\n<td style=\"padding: 10px;\">IEC 62423<\/td>\n<td style=\"padding: 10px;\"><strong>IEC 62423<\/strong><\/td>\n<td style=\"padding: 10px;\"><strong>IEC 62955<\/strong><\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px;\"><strong>AC rezidu\u00e1ln\u00ed proud<\/strong><\/td>\n<td style=\"padding: 10px;\">\u2705<\/td>\n<td style=\"padding: 10px;\">\u2705<\/td>\n<td style=\"padding: 10px;\">\u2705<\/td>\n<td style=\"padding: 10px;\">(Z\u00e1visl\u00e9 na integrovan\u00e9m typu A)<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px;\"><strong>Pulzuj\u00edc\u00ed DC<\/strong><\/td>\n<td style=\"padding: 10px;\">\u2705<\/td>\n<td style=\"padding: 10px;\">\u2705<\/td>\n<td style=\"padding: 10px;\">\u2705<\/td>\n<td style=\"padding: 10px;\">(Z\u00e1visl\u00e9 na integrovan\u00e9m typu A)<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px;\"><strong>Sm\u00ed\u0161en\u00e9 frekvence (1kHz)<\/strong><\/td>\n<td style=\"padding: 10px;\">\u274c<\/td>\n<td style=\"padding: 10px;\">\u2705<\/td>\n<td style=\"padding: 10px;\">\u2705<\/td>\n<td style=\"padding: 10px;\">\u274c<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px;\"><strong>Detekce hladk\u00e9ho DC proudu<\/strong><\/td>\n<td style=\"padding: 10px;\">\u274c<\/td>\n<td style=\"padding: 10px;\">\u274c<\/td>\n<td style=\"padding: 10px;\"><strong>\u2705 (Ano)<\/strong><\/td>\n<td style=\"padding: 10px;\"><strong>\u2705 (Ano)<\/strong><\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px;\"><strong>DC Vyp\u00ednac\u00ed pr\u00e1h<\/strong><\/td>\n<td style=\"padding: 10px;\">NEUPLAT\u0147UJE SE<\/td>\n<td style=\"padding: 10px;\">NEUPLAT\u0147UJE SE<\/td>\n<td style=\"padding: 10px;\"><strong>\u2264 60mA*<\/strong><\/td>\n<td style=\"padding: 10px;\"><strong>6mA<\/strong><\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px;\"><strong>Zabra\u0148uje oslepnut\u00ed?<\/strong><\/td>\n<td style=\"padding: 10px;\">Ne<\/td>\n<td style=\"padding: 10px;\">Ne<\/td>\n<td style=\"padding: 10px;\"><strong>Ano (Imunn\u00ed)<\/strong><\/td>\n<td style=\"padding: 10px;\"><strong>Ano (odpojen\u00edm)<\/strong><\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px;\"><strong>N\u00e1klady<\/strong><\/td>\n<td style=\"padding: 10px;\">N\u00edzk\u00e1<\/td>\n<td style=\"padding: 10px;\">St\u0159edn\u00ed<\/td>\n<td style=\"padding: 10px;\">Vysok\u00e1<\/td>\n<td style=\"padding: 10px;\">St\u0159edn\u00ed (Integrovan\u00e9)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><em>*IEC 62423 umo\u017e\u0148uje, aby stejnosm\u011brn\u00fd vyp\u00ednac\u00ed proud byl a\u017e 2n\u00e1sobek jmenovit\u00e9ho st\u0159\u00eddav\u00e9ho rezidu\u00e1ln\u00edho proudu (I\u0394n). U za\u0159\u00edzen\u00ed s 30 mA je to 60 mA DC. Samotn\u00e9 za\u0159\u00edzen\u00ed je v\u0161ak navr\u017eeno tak, aby tomuto stejnosm\u011brn\u00e9mu proudu odolalo bez oslepnut\u00ed.<\/em><\/p>\n<h2>IEC 62955 vs. IEC 62423: Kter\u00e1 norma plat\u00ed?<\/h2>\n<p>Volba mezi za\u0159\u00edzen\u00edm vyhovuj\u00edc\u00edm norm\u011b IEC 62423 (typ B) a za\u0159\u00edzen\u00edm IEC 62955 (RDC-DD) \u010dasto z\u00e1vis\u00ed na nab\u00edjec\u00edm hardwaru a prost\u0159ed\u00ed instalace.<\/p>\n<h3>Sc\u00e9n\u00e1\u0159 1: \u201cIntegrovan\u00fd\u201d p\u0159\u00edstup (IEC 62955)<\/h3>\n<p>Mnoho modern\u00edch AC wallbox\u016f (7kW \u2013 <a href=\"https:\/\/test.viox.com\/cs\/ev-charger-circuit-breaker-sizing-guide-7kw-22kw\/\">22kW nab\u00edje\u010dky<\/a>) je vybaveno vestav\u011bnou detekc\u00ed 6mA DC. To je <strong>RDC-DD<\/strong> v souladu s IEC 62955.<\/p>\n<ul>\n<li><strong>Po\u017eadavek:<\/strong> Mus\u00edte nainstalovat <strong>RCD typu A<\/strong> p\u0159ed\u0159azen\u00fd v rozvad\u011b\u010di pro \u0159e\u0161en\u00ed AC poruch.<\/li>\n<li><strong>Klady:<\/strong> Ni\u017e\u0161\u00ed n\u00e1klady na komponenty v panelu.<\/li>\n<li><strong>Nev\u00fdhody:<\/strong> Pokud intern\u00ed detekce nab\u00edje\u010dky sel\u017ee, hroz\u00ed oslepnut\u00ed proudov\u00e9ho chr\u00e1ni\u010de typu A. \u00dadr\u017eba zahrnuje v\u00fdm\u011bnu cel\u00e9 desky plo\u0161n\u00fdch spoj\u016f nab\u00edje\u010dky nam\u00edsto komponenty na DIN li\u0161tu.<\/li>\n<\/ul>\n<h3>Sc\u00e9n\u00e1\u0159 2: P\u0159\u00edstup \u201cExtern\u00ed ochrana\u201d (IEC 62423)<\/h3>\n<p>Pou\u017eit\u00ed na DIN li\u0161tu montovan\u00e9ho <strong>RCD typu B<\/strong> (nebo <a href=\"https:\/\/test.viox.com\/cs\/rcbo-vs-rccb-mcb-comparison-space-cost-selectivity\/\">Proudov\u00fd chr\u00e1ni\u010d typu B<\/a>) v rozvad\u011b\u010di.<\/p>\n<ul>\n<li><strong>Po\u017eadavek:<\/strong> Uvnit\u0159 nab\u00edje\u010dky nen\u00ed pot\u0159eba \u017e\u00e1dn\u00e9 dal\u0161\u00ed RDC-DD. Proudov\u00fd chr\u00e1ni\u010d typu B zvl\u00e1d\u00e1 AC, pulzuj\u00edc\u00ed DC a hladk\u00e9 DC poruchy.<\/li>\n<li><strong>Klady:<\/strong> Centralizovan\u00e1 \u00fadr\u017eba, vy\u0161\u0161\u00ed spolehlivost, imunita v\u016f\u010di vn\u011bj\u0161\u00edmu DC ru\u0161en\u00ed, jasn\u00e1 indikace typu poruchy (u pokro\u010dil\u00fdch model\u016f).<\/li>\n<li><strong>Nev\u00fdhody:<\/strong> Vy\u0161\u0161\u00ed po\u010d\u00e1te\u010dn\u00ed n\u00e1klady na komponenty.<\/li>\n<\/ul>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto; display: block; margin: 0 auto;\" src=\"https:\/\/img.viox.com\/Technical-Schematic---Protection-Architecture-Comparison.webp\" alt=\"Comparison of Integrated vs External EV Protection Architecture Options\" \/><figcaption style=\"font-style: italic; text-align: center; color: #555; margin-top: 8px;\">Mo\u017enosti architektury ochrany: Integrovan\u00e9 6mA RDC-DD (vlevo) vs. extern\u00ed proudov\u00fd chr\u00e1ni\u010d typu B (vpravo).<\/figcaption><\/figure>\n<h2>R\u00e1mec rozhodov\u00e1n\u00ed o v\u00fdb\u011bru<\/h2>\n<p>P\u0159i specifikaci ochrany pro projekt postupujte podle t\u00e9to logiky, abyste zajistili shodu s IEC 60364-7-722:<\/p>\n<ol>\n<li><strong>Zkontrolujte datov\u00fd list nab\u00edje\u010dky:<\/strong> Prohla\u0161uje EVSE (Electric Vehicle Supply Equipment) vestav\u011bn\u00e9 RDC-DD v souladu s IEC 62955?\n<ul>\n<li><strong>ANO:<\/strong> M\u016f\u017eete pou\u017e\u00edt <strong>Typ A<\/strong> (nebo typ F) RCD\/RCBO v panelu.<\/li>\n<li><strong>NE:<\/strong> Pou\u017e\u00edv\u00e1te <strong>fungovalo,<\/strong> pou\u017eijte <strong>Typ B<\/strong> RCD v panelu.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Zkontrolujte selektivitu p\u0159ed\u0159azen\u00e9ho ji\u0161t\u011bn\u00ed:<\/strong>\n<ul>\n<li>Pokud instalujete proudov\u00fd chr\u00e1ni\u010d typu B pro nab\u00edje\u010dku, ujist\u011bte se, \u017ee <em>na stran\u011b dodavatele<\/em> hlavn\u00ed proudov\u00fd chr\u00e1ni\u010d nen\u00ed typu A. Stejnosm\u011brn\u00e1 porucha proch\u00e1zej\u00edc\u00ed typem B by mohla oslepit p\u0159ed\u0159azen\u00fd typ A. V ide\u00e1ln\u00edm p\u0159\u00edpad\u011b by m\u011bl b\u00fdt obvod EV p\u0159ipojen paraleln\u011b k ostatn\u00edm obvod\u016fm, nikoli za obecn\u00fdm typem A <a href=\"https:\/\/test.viox.com\/cs\/rccb\/\">RCCB<\/a>, nebo by m\u011bl b\u00fdt hlavn\u00ed vyp\u00edna\u010d typu B (vz\u00e1cn\u00e9\/drah\u00e9) nebo bez RCD (pokud to TN-C-S\/TN-S umo\u017e\u0148uje).<\/li>\n<\/ul>\n<\/li>\n<li><strong>Zva\u017ete komer\u010dn\u00ed prost\u0159ed\u00ed:<\/strong>\n<ul>\n<li>V komer\u010dn\u00edch prost\u0159ed\u00edch s v\u00edce nab\u00edje\u010dkami m\u016f\u017ee b\u00fdt kumulativn\u00ed svod (i pod 6 mA na nab\u00edje\u010dku) problematick\u00fd. <strong>Proudov\u00e9 chr\u00e1ni\u010de typu B<\/strong> jsou preferov\u00e1ny pro trvanlivost a aby se zabr\u00e1nilo spol\u00e9h\u00e1n\u00ed se na r\u016fznorodou kvalitu intern\u00ed elektroniky nab\u00edje\u010dky.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto; display: block; margin: 0 auto;\" src=\"https:\/\/img.viox.com\/EV-Distribution-Board-Installation.webp\" alt=\"Commercial EV electrical distribution board installation\" \/><figcaption style=\"font-style: italic; text-align: center; color: #555; margin-top: 8px;\">Profesion\u00e1ln\u00ed instalace VIOX proudov\u00fdch chr\u00e1ni\u010d\u016f typu B v komer\u010dn\u00edm rozvad\u011b\u010di EV.<\/figcaption><\/figure>\n<h2>Anal\u00fdza n\u00e1klad\u016f a bezpe\u010dnosti<\/h2>\n<table style=\"border-collapse: collapse; width: 100%; margin-bottom: 20px;\" border=\"1\">\n<thead style=\"background-color: #f2f2f2;\">\n<tr>\n<th style=\"padding: 10px;\">Strategie komponent<\/th>\n<th style=\"padding: 10px;\">N\u00e1klady na vybaven\u00ed<\/th>\n<th style=\"padding: 10px;\">Instala\u010dn\u00ed pr\u00e1ce<\/th>\n<th style=\"padding: 10px;\">Spolehlivost<\/th>\n<th style=\"padding: 10px;\">\u00dadr\u017eba<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding: 10px;\"><strong>Proudov\u00fd chr\u00e1ni\u010d typu A + 6mA RDC-DD (vestav\u011bn\u00fd)<\/strong><\/td>\n<td style=\"padding: 10px;\">N\u00edzk\u00e1<\/td>\n<td style=\"padding: 10px;\">Standardn\u00ed<\/td>\n<td style=\"padding: 10px;\">Z\u00e1visl\u00e9 na kvalit\u011b EVSE<\/td>\n<td style=\"padding: 10px;\">Komplexn\u00ed (oprava nab\u00edje\u010dky)<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px;\"><strong>Proudov\u00fd chr\u00e1ni\u010d typu B (extern\u00ed)<\/strong><\/td>\n<td style=\"padding: 10px;\">Vysok\u00e1<\/td>\n<td style=\"padding: 10px;\">Standardn\u00ed<\/td>\n<td style=\"padding: 10px;\"><strong>Velmi vysok\u00e1 (pr\u016fmyslov\u00e1 kvalita)<\/strong><\/td>\n<td style=\"padding: 10px;\">Jednoduch\u00e9 (v\u00fdm\u011bna jisti\u010de)<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px;\"><strong>Proudov\u00fd chr\u00e1ni\u010d typu F + RDC-DD<\/strong><\/td>\n<td style=\"padding: 10px;\">St\u0159edn\u00ed<\/td>\n<td style=\"padding: 10px;\">Standardn\u00ed<\/td>\n<td style=\"padding: 10px;\">St\u0159edn\u00ed<\/td>\n<td style=\"padding: 10px;\">Komplex<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Pro vysoce hodnotn\u00e1 aktiva a kritickou infrastrukturu <strong>RCD typu B<\/strong> z\u016fst\u00e1v\u00e1 in\u017een\u00fdrskou preferenc\u00ed d\u00edky sv\u00e9 nez\u00e1vislosti na intern\u00ed elektronice nab\u00edje\u010dky. Pro hromadn\u00e9 reziden\u010dn\u00ed zav\u00e1d\u011bn\u00ed <strong>Typ A + RDC-DD<\/strong> model je ekonomick\u00fd standard.<\/p>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto; display: block; margin: 0 auto;\" src=\"https:\/\/img.viox.com\/Technical-Flowchart---RCD-Selection-Decision-Tree.webp\" alt=\"Decision Tree Flowchart for Selecting EV Charger Protection\" \/><figcaption style=\"font-style: italic; text-align: center; color: #555; margin-top: 8px;\">Podrobn\u00fd rozhodovac\u00ed v\u00fdvojov\u00fd diagram pro v\u00fdb\u011br mezi proudov\u00fdmi chr\u00e1ni\u010di typu A a typu B na z\u00e1klad\u011b specifikac\u00ed nab\u00edje\u010dky.<\/figcaption><\/figure>\n<h2>\u010cASTO KLADEN\u00c9 DOTAZY<\/h2>\n<p><strong>Ot\u00e1zka: Mohu pou\u017e\u00edt proudov\u00fd chr\u00e1ni\u010d typu AC pro nab\u00edjen\u00ed EV?<\/strong><br \/>\nA: <strong>\u017d\u00e1dn\u00fd.<\/strong> Proudov\u00e9 chr\u00e1ni\u010de typu AC jsou pro nab\u00edjen\u00ed EV ve v\u011bt\u0161in\u011b jurisdikc\u00ed zak\u00e1z\u00e1ny (v\u010detn\u011b IEC 60364-7-722), proto\u017ee nemohou detekovat pulzuj\u00edc\u00ed DC, kter\u00fd je b\u011b\u017en\u00fd v usm\u011br\u0148ovac\u00edch obvodech EV.<\/p>\n<p><strong>Ot\u00e1zka: Pokud m\u00e1m proudov\u00fd chr\u00e1ni\u010d typu B, pot\u0159ebuji zemn\u00edc\u00ed ty\u010d?<\/strong><br \/>\nOdpov\u011b\u010f: Typ RCD ur\u010duje detekci svodu, nikoli uspo\u0159\u00e1d\u00e1n\u00ed uzemn\u011bn\u00ed. Nicm\u00e9n\u011b, pro nap\u00e1jen\u00ed PME (TN-C-S) m\u016f\u017eete st\u00e1le pot\u0159ebovat za\u0159\u00edzen\u00ed pro detekci otev\u0159en\u00e9ho PEN nebo zemn\u00edc\u00ed ty\u010d, bez ohledu na to, zda pou\u017e\u00edv\u00e1te proudov\u00fd chr\u00e1ni\u010d typu B nebo typu A.<\/p>\n<p><strong>Ot\u00e1zka: Jak\u00fd je rozd\u00edl mezi RDC-MD a RDC-PD?<\/strong><br \/>\nOdpov\u011b\u010f: Oba jsou definov\u00e1ny v IEC 62955. An <strong>RDC-MD<\/strong> <em>monitory<\/em> svod a d\u00e1 pokyn styka\u010di k rozepnut\u00ed (levn\u011bj\u0161\u00ed, integrovan\u00e9). <strong>RDC-PD<\/strong> m\u00e1 sv\u016fj vlastn\u00ed <em>ochrana<\/em> (sp\u00ednac\u00ed) mechanismus, d\u00edky \u010demu\u017e je bezpe\u010dn\u011bj\u0161\u00ed, pokud se styka\u010d sva\u0159\u00ed.<\/p>\n<p><strong>Ot\u00e1zka: Mohu pou\u017e\u00edt RCD typu B za RCD typu A?<\/strong><br \/>\nOdpov\u011b\u010f: Obecn\u011b ne. Ide\u00e1ln\u011b by m\u011bly b\u00fdt RCD koordinov\u00e1ny. Pokud dojde k DC poru\u0161e, prot\u00e9k\u00e1 ob\u011bma. RCD typu B na v\u00fdstupu vypne, ale DC proud mohl ji\u017e zaslepit RCD typu A na vstupu a vy\u0159adit jej z provozu pro jin\u00e9 obvody. Nejlep\u0161\u00ed prax\u00ed je p\u0159ipojit EV obvod paraleln\u011b nebo zajistit, aby bylo i za\u0159\u00edzen\u00ed na vstupu typu B (nebo \u010dasov\u011b zpo\u017ed\u011bn\u00e9 typu S, pokud je to vhodn\u00e9 pro uzemn\u011bn\u00ed syst\u00e9mu).<\/p>\n<hr \/>\n<p><em>Pro v\u00edce informac\u00ed o v\u00fdb\u011bru spr\u00e1vn\u00e9 ochrany obvod\u016f pro va\u0161e projekty si prostudujte na\u0161e pr\u016fvodce o <a href=\"https:\/\/test.viox.com\/cs\/electrical-derating-temperature-altitude-grouping-factors\/\">Elektrick\u00e9 reduk\u010dn\u00ed faktory<\/a> a <a href=\"https:\/\/test.viox.com\/cs\/types-of-circuit-breakers\/\">Typy jisti\u010d\u016f<\/a>.<\/em><\/p>\n<\/div>\n<div class=\"simg-pop-btn\" style=\"top: 3857.31px; left: 14px; display: none;\"><\/div>\n<div class=\"simg-pop-btn\" style=\"top: 3857.31px; left: 14px; display: none;\"><\/div>","protected":false},"excerpt":{"rendered":"<p>For electrical engineers and installers, the rapid expansion of Electric Vehicle (EV) infrastructure presents a specific protection challenge: DC fault currents. Unlike standard household loads, the rectification circuits within EV On-Board Chargers (OBC) can generate smooth DC leakage currents in the event of a fault. If not properly isolated, these DC currents can blind upstream [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":21293,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-21292","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\/21292","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=21292"}],"version-history":[{"count":1,"href":"https:\/\/test.viox.com\/cs\/wp-json\/wp\/v2\/posts\/21292\/revisions"}],"predecessor-version":[{"id":21294,"href":"https:\/\/test.viox.com\/cs\/wp-json\/wp\/v2\/posts\/21292\/revisions\/21294"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/test.viox.com\/cs\/wp-json\/wp\/v2\/media\/21293"}],"wp:attachment":[{"href":"https:\/\/test.viox.com\/cs\/wp-json\/wp\/v2\/media?parent=21292"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/test.viox.com\/cs\/wp-json\/wp\/v2\/categories?post=21292"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/test.viox.com\/cs\/wp-json\/wp\/v2\/tags?post=21292"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}