{"id":23388,"date":"2026-04-05T15:15:36","date_gmt":"2026-04-05T07:15:36","guid":{"rendered":"https:\/\/viox.com\/?p=23388"},"modified":"2026-04-05T15:15:39","modified_gmt":"2026-04-05T07:15:39","slug":"how-to-read-dc-isolator-switch-ratings-voltage-current-poles-and-utilization-categories","status":"publish","type":"post","link":"https:\/\/test.viox.com\/cs\/how-to-read-dc-isolator-switch-ratings-voltage-current-poles-and-utilization-categories\/","title":{"rendered":"Jak \u010d\u00edst parametry DC odpojova\u010de: Nap\u011bt\u00ed, proud, p\u00f3ly a kategorie pou\u017eit\u00ed"},"content":{"rendered":"<div class=\"product-intro\">\n<h2>P\u0159\u00edm\u00e1 odpov\u011b\u010f<\/h2>\n<p>\u010cten\u00ed <a href=\"https:\/\/test.viox.com\/cs\/dc-isolator-switch\/\">DC izola\u010dn\u00ed sp\u00edna\u010d<\/a> \u0161t\u00edtku spr\u00e1vn\u011b se skl\u00e1d\u00e1 ze \u010dty\u0159 v\u011bc\u00ed, kontrolovan\u00fdch v tomto po\u0159ad\u00ed:<\/p>\n<ul>\n<li><strong>Jmenovit\u00e9 nap\u011bt\u00ed<\/strong> \u2014 zvl\u00e1dne sp\u00edna\u010d bezpe\u010dn\u011b nejvy\u0161\u0161\u00ed stejnosm\u011brn\u00e9 nap\u011bt\u00ed ve va\u0161em syst\u00e9mu?<\/li>\n<li><strong>Aktu\u00e1ln\u00ed hodnocen\u00ed<\/strong> \u2014 unese o\u010dek\u00e1van\u00fd trval\u00fd proud bez p\u0159eh\u0159\u00edv\u00e1n\u00ed?<\/li>\n<li><strong>Konfigurace p\u00f3l\u016f<\/strong> \u2014 kolik vodi\u010d\u016f odpojuje sou\u010dasn\u011b?<\/li>\n<li><strong>Kategorie vyu\u017eit\u00ed<\/strong> \u2014 pro jak\u00fd druh stejnosm\u011brn\u00e9ho sp\u00edn\u00e1n\u00ed byl skute\u010dn\u011b testov\u00e1n?<\/li>\n<\/ul>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/Engineer-inspecting-DC-isolator-switch-ratings-on-a-photovoltaic-installation.webp\" alt=\"Engineer inspecting DC isolator switch ratings on a photovoltaic installation\" \/><figcaption style=\"font-style: italic; color: #555; margin-top: 8px;\">In\u017een\u00fdr pe\u010dliv\u011b kontroluje jmenovit\u00e9 hodnoty na DC odpojova\u010di ve fotovoltaick\u00e9 instalaci, aby zajistil bezpe\u010dnost a shodu syst\u00e9mu.<\/figcaption><\/figure>\n<p>Po\u0159ad\u00ed je d\u016fle\u017eit\u00e9. V praxi se nej\u010dast\u011bj\u0161\u00ed chyby v hodnocen\u00ed st\u00e1vaj\u00ed, kdy\u017e se kupuj\u00edc\u00ed nejprve zam\u011b\u0159\u00ed na \u010d\u00edslo amp\u00e9ru a p\u0159ehl\u00e9dnou t\u0159\u00eddu nap\u011bt\u00ed nebo kategorii pou\u017eit\u00ed. 32 A izol\u00e1tor nen\u00ed automaticky vhodn\u00fd pro ka\u017ed\u00fd 32 A DC obvod, zejm\u00e9na ve fotovoltaick\u00fdch syst\u00e9mech, kde studen\u00e9 po\u010das\u00ed Voc, uspo\u0159\u00e1d\u00e1n\u00ed p\u00f3l\u016f a DC sp\u00ednac\u00ed povinnost mohou odpov\u011b\u010f zcela zm\u011bnit.<\/p>\n<p>Pokud nejprve pot\u0159ebujete \u0161ir\u0161\u00ed pozad\u00ed za\u0159\u00edzen\u00ed, za\u010dn\u011bte s <a href=\"https:\/\/test.viox.com\/cs\/what-is-a-dc-isolator-switch\/\">Co je stejnosm\u011brn\u00fd izola\u010dn\u00ed sp\u00edna\u010d?<\/a>. Pokud ji\u017e m\u00e1te p\u0159ed sebou \u0161t\u00edtek, datov\u00fd list nebo specifikaci produktu, tento pr\u016fvodce v\u00e1s provede t\u00edm, co ka\u017ed\u00e1 \u0159\u00e1dka znamen\u00e1 a co je t\u0159eba ov\u011b\u0159it d\u00e1le.<\/p>\n<h2>Tabulka rychl\u00e9 orientace<\/h2>\n<table style=\"border-collapse: collapse; width: 100%; text-align: left; margin-bottom: 20px;\" border=\"1\" cellspacing=\"0\" cellpadding=\"8\">\n<thead>\n<tr>\n<th>Hodnot\u00edc\u00ed polo\u017eka<\/th>\n<th>Co v\u00e1m to \u0159\u00edk\u00e1<\/th>\n<th>B\u011b\u017en\u00e1 chyba<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>Jmenovit\u00e9 nap\u011bt\u00ed (Ue)<\/strong><\/td>\n<td>Maxim\u00e1ln\u00ed stejnosm\u011brn\u00e9 provozn\u00ed nap\u011bt\u00ed, kter\u00e9 sp\u00edna\u010d zvl\u00e1dne p\u0159i sv\u00e9m uveden\u00e9m zat\u00ed\u017een\u00ed<\/td>\n<td>Shoda pouze jmenovit\u00e9ho nap\u011bt\u00ed syst\u00e9mu a ignorov\u00e1n\u00ed Voc fotovoltaick\u00fdch \u010dl\u00e1nk\u016f korigovan\u00e9ho za studena<\/td>\n<\/tr>\n<tr>\n<td><strong>Jmenovit\u00fd proud (Ie)<\/strong><\/td>\n<td>Proud, kter\u00fd sp\u00edna\u010d unese p\u0159i specifikovan\u00e9m zat\u00ed\u017een\u00ed<\/td>\n<td>Za p\u0159edpokladu, \u017ee jmenovit\u00fd proud z\u016fst\u00e1v\u00e1 stejn\u00fd v ka\u017ed\u00e9m krytu a teplotn\u00edch podm\u00ednk\u00e1ch<\/td>\n<\/tr>\n<tr>\n<td><strong>Pol\u00e1ci<\/strong><\/td>\n<td>Kolik vodi\u010d\u016f je odpojeno dohromady<\/td>\n<td>Pova\u017eov\u00e1n\u00ed 2P a 4P za zam\u011bniteln\u00e9<\/td>\n<\/tr>\n<tr>\n<td><strong>Kategorie vyu\u017eit\u00ed<\/strong><\/td>\n<td>Typ sp\u00ednac\u00edho zat\u00ed\u017een\u00ed, pro kter\u00e9 bylo za\u0159\u00edzen\u00ed testov\u00e1no<\/td>\n<td>Ignorov\u00e1n\u00ed toho, zda byl sp\u00edna\u010d dimenzov\u00e1n pro skute\u010dn\u00e9 podm\u00ednky stejnosm\u011brn\u00e9ho zat\u00ed\u017een\u00ed<\/td>\n<\/tr>\n<tr>\n<td><strong>Certifikace nebo standardn\u00ed z\u00e1klad<\/strong><\/td>\n<td>Se kter\u00fdm trhem a testovac\u00edm r\u00e1mcem je za\u0159\u00edzen\u00ed v souladu<\/td>\n<td>Pou\u017e\u00edv\u00e1n\u00ed produkt\u016f ozna\u010den\u00fdch AC nebo v\u00e1gn\u011b popsan\u00fdch produkt\u016f v aplikaci PV DC<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\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-showing-how-to-read-ratings-on-a-photovoltaic-DC-isolator-switch.webp\" alt=\"Technical infographic showing how to read ratings on a photovoltaic DC isolator switch\" \/><figcaption style=\"font-style: italic; color: #555; margin-top: 8px;\">Technick\u00e1 infografika podrobn\u011b popisuj\u00edc\u00ed kl\u00ed\u010dov\u00e9 metriky a hodnocen\u00ed, kter\u00e9 je t\u0159eba hledat na \u0161t\u00edtku fotovoltaick\u00e9ho DC odpojova\u010de.<\/figcaption><\/figure>\n<h2>Pro\u010d je \u010dten\u00ed \u0161t\u00edtku d\u016fle\u017eit\u011bj\u0161\u00ed, ne\u017e byste \u010dekali<\/h2>\n<p>\u0160t\u00edtek DC odpojova\u010de nen\u00ed dekorace katalogu. Je to kompaktn\u00ed shrnut\u00ed podm\u00ednek, za kter\u00fdch bylo prok\u00e1z\u00e1no, \u017ee za\u0159\u00edzen\u00ed bezpe\u010dn\u011b funguje.<\/p>\n<p>To je zvl\u00e1\u0161t\u011b d\u016fle\u017eit\u00e9 u sol\u00e1rn\u00edch FV, proto\u017ee:<\/p>\n<ul>\n<li>nap\u011bt\u00ed pole se m\u011bn\u00ed s teplotou a chladn\u00e9 r\u00e1no m\u016f\u017ee posunout Voc vysoko nad jmenovitou hodnotu<\/li>\n<li>strana DC z\u016fst\u00e1v\u00e1 pod nap\u011bt\u00edm, kdykoli je denn\u00ed sv\u011btlo<\/li>\n<li>DC oblouky se chovaj\u00ed odli\u0161n\u011b od AC oblouk\u016f, tak\u017ee sp\u00ednac\u00ed podm\u00ednky jsou n\u00e1ro\u010dn\u011bj\u0161\u00ed<\/li>\n<li>ozna\u010den\u00ed produktu mohou na povrchu vypadat podobn\u011b, zat\u00edmco skute\u010dn\u00e9 aplika\u010dn\u00ed limity se v\u00fdrazn\u011b li\u0161\u00ed<\/li>\n<\/ul>\n<p>S ohledem na to je nejbezpe\u010dn\u011bj\u0161\u00ed postup proj\u00edt ka\u017ed\u00e9 hodnocen\u00ed jedno po druh\u00e9m.<\/p>\n<h2>Jmenovit\u00e9 nap\u011bt\u00ed: Za\u010dn\u011bte zde jako prvn\u00ed<\/h2>\n<p>Prvn\u00ed \u010d\u00edslo, kter\u00e9 je t\u0159eba zkontrolovat, je jmenovit\u00e9 stejnosm\u011brn\u00e9 nap\u011bt\u00ed, \u010dasto zobrazen\u00e9 jako <code>Ue<\/code> nebo uveden\u00e9 jako maxim\u00e1ln\u00ed stejnosm\u011brn\u00e9 provozn\u00ed nap\u011bt\u00ed.<\/p>\n<h3>Co znamen\u00e1 jmenovit\u00e9 nap\u011bt\u00ed<\/h3>\n<p>Jmenovit\u00e9 nap\u011bt\u00ed v\u00e1m \u0159\u00edk\u00e1 maxim\u00e1ln\u00ed stejnosm\u011brn\u00e9 nap\u011bt\u00ed syst\u00e9mu, kter\u00e9 izol\u00e1tor zvl\u00e1dne p\u0159i zat\u00ed\u017een\u00ed, pro kter\u00e9 byl testov\u00e1n. V PV pr\u00e1ci je to kritick\u00e9, proto\u017ee za\u0159\u00edzen\u00ed m\u016f\u017ee b\u00fdt pou\u017eito p\u0159i:<\/p>\n<ul>\n<li>600 VDC<\/li>\n<li>800 VDC<\/li>\n<li>1000 VDC<\/li>\n<li>1200 VDC<\/li>\n<li>nebo 1500 VDC, v z\u00e1vislosti na architektu\u0159e instalace<\/li>\n<\/ul>\n<h3>Nej\u010dast\u011bj\u0161\u00ed chyba: pou\u017eit\u00ed jmenovit\u00e9ho nap\u011bt\u00ed nam\u00edsto maxim\u00e1ln\u00edho korigovan\u00e9ho nap\u011bt\u00ed<\/h3>\n<p>V sol\u00e1rn\u00edch syst\u00e9mech nevyb\u00edr\u00e1te izol\u00e1tor pouze na z\u00e1klad\u011b jmenovit\u00e9ho \u0161t\u00edtku stejnosm\u011brn\u00e9ho syst\u00e9mu. Pot\u0159ebujete maxim\u00e1ln\u00ed nap\u011bt\u00ed napr\u00e1zdno, v\u010detn\u011b korekce teploty za studena.<\/p>\n<p>Zva\u017ete tento sc\u00e9n\u00e1\u0159: FV string je navr\u017een pro \u201csyst\u00e9m 1000 V\u201d, ale za chladn\u00e9ho zimn\u00edho r\u00e1na dos\u00e1hne skute\u010dn\u00e9 Voc 1050 V. Pokud je izol\u00e1tor dimenzov\u00e1n pouze na 1000 VDC, je efektivn\u011b poddimenzov\u00e1n, i kdy\u017e na nab\u00eddkov\u00e9m listu vypadalo v\u0161e v po\u0159\u00e1dku.<\/p>\n<p>To je jeden z d\u016fvod\u016f, pro\u010d by m\u011bl b\u00fdt DC izol\u00e1tor ve fotovoltaick\u00fdch syst\u00e9mech p\u0159ezkoum\u00e1n se stejnou in\u017een\u00fdrskou discipl\u00ednou jako ostatn\u00ed vysoce rizikov\u00e1 DC za\u0159\u00edzen\u00ed.<\/p>\n<h3>Rychl\u00fd p\u0159\u00edklad kontroly nap\u011bt\u00ed<\/h3>\n<table style=\"border-collapse: collapse; width: 100%; text-align: left; margin-bottom: 20px;\" border=\"1\" cellspacing=\"0\" cellpadding=\"8\">\n<thead>\n<tr>\n<th>Sc\u00e9n\u00e1\u0159<\/th>\n<th>\u0160t\u00edtek syst\u00e9mu<\/th>\n<th>Skute\u010dn\u00e9 Voc za chladn\u00e9ho r\u00e1na<\/th>\n<th>Po\u017eadovan\u00e9 minim\u00e1ln\u00ed Ue<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>St\u0159e\u0161n\u00ed FV, m\u00edrn\u00e9 klima<\/strong><\/td>\n<td>1000 VDC<\/td>\n<td>1035 V<\/td>\n<td>Alespo\u0148 nad 1035 VDC, s po\u017eadovanou projektovou rezervou<\/td>\n<\/tr>\n<tr>\n<td><strong>FV v m\u011b\u0159\u00edtku ve\u0159ejn\u00fdch slu\u017eeb, chladn\u00e1 oblast<\/strong><\/td>\n<td>1500 VDC<\/td>\n<td>1540 V<\/td>\n<td>Vy\u017eaduje pe\u010dliv\u00fd n\u00e1vrh stringu nebo vhodn\u011b dimenzovan\u00e9 \u0159e\u0161en\u00ed s vy\u0161\u0161\u00edm nap\u011bt\u00edm<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Z\u00e1v\u011br je jednoduch\u00fd: v\u017edy dimenzujte jmenovit\u00e9 nap\u011bt\u00ed proti nejhor\u0161\u00edmu korigovan\u00e9mu Voc, nikoli \u0161t\u00edtku syst\u00e9mu.<\/p>\n<h2>Jmenovit\u00fd proud: V\u00edce ne\u017e jen \u010d\u00edslo amp\u00e9ru<\/h2>\n<p>Dal\u0161\u00ed polo\u017ekou je jmenovit\u00fd proud, \u010dasto zobrazen\u00fd jako <code>Ie<\/code>.<\/p>\n<h3>Co znamen\u00e1 jmenovit\u00fd proud<\/h3>\n<p>Jmenovit\u00fd proud ud\u00e1v\u00e1, jak\u00fd proud m\u016f\u017ee izol\u00e1tor trvale v\u00e9st za podm\u00ednek definovan\u00fdch produktovou normou a v\u00fdrobcem. V re\u00e1ln\u00fdch projektech by se toto \u010d\u00edslo m\u011blo ov\u011b\u0159it s ohledem na:<\/p>\n<ul>\n<li>o\u010dek\u00e1van\u00fd provozn\u00ed proud<\/li>\n<li>okoln\u00ed teplotu v m\u00edst\u011b instalace<\/li>\n<li>nadmo\u0159skou v\u00fd\u0161ku, kde je to relevantn\u00ed<\/li>\n<li>vlivy oh\u0159evu rozvad\u011b\u010de<\/li>\n<li>seskupov\u00e1n\u00ed vodi\u010d\u016f<\/li>\n<li>orientaci instalace, pokud je specifikov\u00e1na v\u00fdrobcem<\/li>\n<\/ul>\n<h3>Pro\u010d samotn\u00fd jmenovit\u00fd proud ne\u0159\u00edk\u00e1 cel\u00fd p\u0159\u00edb\u011bh<\/h3>\n<p>Dva izol\u00e1tory, oba ozna\u010den\u00e9 <code>32 A<\/code> nemus\u00ed b\u00fdt stejn\u011b vhodn\u00e9 v ka\u017ed\u00e9 situaci.<\/p>\n<table style=\"border-collapse: collapse; width: 100%; text-align: left; margin-bottom: 20px;\" border=\"1\" cellspacing=\"0\" cellpadding=\"8\">\n<thead>\n<tr>\n<th>Faktor<\/th>\n<th>Izol\u00e1tor A (32 A)<\/th>\n<th>Izol\u00e1tor B (32 A)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>Typ rozvad\u011b\u010de<\/strong><\/td>\n<td>V\u011btran\u00fd vnit\u0159n\u00ed panel<\/td>\n<td>Ut\u011bsn\u011bn\u00e1 venkovn\u00ed PV slu\u010dovac\u00ed sk\u0159\u00ed\u0148, okoln\u00ed teplota 55 \u00b0C<\/td>\n<\/tr>\n<tr>\n<td><strong>Kategorie vyu\u017eit\u00ed<\/strong><\/td>\n<td>DC-21B<\/td>\n<td>DC-PV2<\/td>\n<\/tr>\n<tr>\n<td><strong>Konfigurace p\u00f3l\u016f<\/strong><\/td>\n<td>2P<\/td>\n<td>4P<\/td>\n<\/tr>\n<tr>\n<td><strong>Praktick\u00e1 vhodnost pro 30 A st\u0159e\u0161n\u00ed FV string<\/strong><\/td>\n<td>M\u016f\u017ee vy\u017eadovat sn\u00ed\u017een\u00ed jmenovit\u00e9ho proudu kv\u016fli teplot\u011b<\/td>\n<td>M\u016f\u017ee b\u00fdt vhodn\u011bj\u0161\u00ed, v z\u00e1vislosti na \u00fapln\u00e9m n\u00e1vrhu<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Nejde o to, \u017ee jeden je v\u017edy lep\u0161\u00ed ne\u017e druh\u00fd. Jde o to, \u017ee proud by m\u011bl b\u00fdt v\u017edy \u010dten spole\u010dn\u011b s nap\u011bt\u00edm a kategori\u00ed pou\u017eit\u00ed, nikoli izolovan\u011b.<\/p>\n<h2>P\u00f3ly: Co 2P a 4P skute\u010dn\u011b znamenaj\u00ed<\/h2>\n<p>Konfigurace p\u00f3l\u016f ud\u00e1v\u00e1, kolik vodi\u010d\u016f sp\u00edna\u010d otev\u00edr\u00e1 sou\u010dasn\u011b.<\/p>\n<h3>2-p\u00f3lov\u00fd izol\u00e1tor<\/h3>\n<p>A <strong>2P<\/strong> DC izol\u00e1tor se b\u011b\u017en\u011b pou\u017e\u00edv\u00e1 tam, kde se sou\u010dasn\u011b odpojuje jeden kladn\u00fd a jeden z\u00e1porn\u00fd vodi\u010d pro jeden string nebo jeden DC obvod.<\/p>\n<h3>4-p\u00f3lov\u00fd izol\u00e1tor<\/h3>\n<p>A <strong>4P<\/strong> DC izol\u00e1tor se b\u011b\u017en\u011b pou\u017e\u00edv\u00e1 v aplikac\u00edch, kde se jedn\u00edm za\u0159\u00edzen\u00edm odpojuj\u00ed dva stringy nebo jin\u00e9 uspo\u0159\u00e1d\u00e1n\u00ed vodi\u010d\u016f, nebo kde je vnit\u0159n\u00ed sp\u00ednac\u00ed cesta konfigurov\u00e1na pro zvl\u00e1dnut\u00ed vy\u0161\u0161\u00edho DC nap\u011bt\u00ed pomoc\u00ed s\u00e9riov\u011b zapojen\u00fdch p\u00f3l\u016f.<\/p>\n<h3>Pro\u010d si po\u010det p\u00f3l\u016f zaslou\u017e\u00ed v\u00edce pozornosti, ne\u017e se mu obvykle dost\u00e1v\u00e1<\/h3>\n<p>Je snadn\u00e9 si myslet, \u017ee p\u00f3ly jsou jen jednoduch\u00e9 usnadn\u011bn\u00ed zapojen\u00ed. V praxi m\u016f\u017ee po\u010det p\u00f3l\u016f ovlivnit:<\/p>\n<ul>\n<li>jak jsou vodi\u010de skute\u010dn\u011b p\u0159eru\u0161eny<\/li>\n<li>maxim\u00e1ln\u00ed vyu\u017eiteln\u00e9 nap\u011bt\u00ed, kde s\u00e9riov\u011b zapojen\u00e9 p\u00f3ly mohou roz\u0161\u00ed\u0159it mo\u017enosti<\/li>\n<li>konfiguraci vnit\u0159n\u00edch kontakt\u016f<\/li>\n<li>akceptovanou metodu zapojen\u00ed<\/li>\n<\/ul>\n<p>4-p\u00f3lov\u00fd sp\u00edna\u010d nen\u00ed jednodu\u0161e \u201cv\u011bt\u0161\u00ed 2-p\u00f3lov\u00fd sp\u00edna\u010d\u201d. Sch\u00e9ma zapojen\u00ed od v\u00fdrobce st\u00e1le ur\u010duje, jak by m\u011bly b\u00fdt p\u00f3ly zapojeny, a nespr\u00e1vn\u00e9 zapojen\u00ed m\u016f\u017ee zp\u016fsobit bezpe\u010dnostn\u00ed probl\u00e9my.<\/p>\n<p>Pokud je metoda zapojen\u00ed va\u0161\u00ed hlavn\u00ed ot\u00e1zkou, dal\u0161\u00ed relevantn\u00ed str\u00e1nka je <a href=\"https:\/\/test.viox.com\/cs\/connection-of-dc-isolators\/\">P\u0159ipojen\u00ed DC odpojova\u010d\u016f<\/a>.<\/p>\n<h2>Kategorie pou\u017eit\u00ed: Hodnocen\u00ed, kter\u00e9 v\u011bt\u0161ina lid\u00ed p\u0159esko\u010d\u00ed a nem\u011bla by<\/h2>\n<p>Toto je jedna z nejd\u016fle\u017eit\u011bj\u0161\u00edch \u0159\u00e1dek v technick\u00e9m listu DC izol\u00e1toru a jedna z nejv\u00edce p\u0159ehl\u00ed\u017een\u00fdch.<\/p>\n<h3>Co znamen\u00e1 kategorie pou\u017eit\u00ed, laicky \u0159e\u010deno<\/h3>\n<p>P\u0159edstavte si kategorii pou\u017eit\u00ed jako testovac\u00ed sc\u00e9n\u00e1\u0159, kter\u00fdm sp\u00edna\u010d pro\u0161el, ne\u017e mu bylo umo\u017en\u011bno n\u00e9st toto ozna\u010den\u00ed. Podle <strong>IEC 60947-3<\/strong>, ka\u017ed\u00fd DC izol\u00e1tor je testov\u00e1n proti specifick\u00e9 sp\u00ednac\u00ed z\u00e1t\u011b\u017ei, co\u017e znamen\u00e1 definovanou kombinaci nap\u011bt\u00ed, proudu, typu z\u00e1t\u011b\u017ee a po\u010dtu sp\u00ednac\u00edch operac\u00ed.<\/p>\n<p>Kategorie pou\u017eit\u00ed vyti\u0161t\u011bn\u00e1 na \u0161t\u00edtku ud\u00e1v\u00e1, kter\u00fdm testovac\u00edm sc\u00e9n\u00e1\u0159em sp\u00edna\u010d pro\u0161el. V praktick\u00e9m smyslu odpov\u00edd\u00e1 na ot\u00e1zky:<\/p>\n<ul>\n<li>byl tento sp\u00edna\u010d testov\u00e1n pouze pro z\u00e1kladn\u00ed, dob\u0159e se chovaj\u00edc\u00ed odporov\u00e9 z\u00e1t\u011b\u017ee?<\/li>\n<li>nebo byl testov\u00e1n pro n\u00e1ro\u010dn\u011bj\u0161\u00ed podm\u00ednky zahrnuj\u00edc\u00ed induk\u010dn\u00ed z\u00e1t\u011b\u017ee nebo chov\u00e1n\u00ed specifick\u00e9 pro fotovoltaiku?<\/li>\n<\/ul>\n<h3>Obecn\u00e9 DC kategorie: DC-21B a DC-22B<\/h3>\n<p>Ve zjednodu\u0161en\u00e9 rovin\u011b:<\/p>\n<ul>\n<li><strong>DC-21B<\/strong> pokr\u00fdv\u00e1 odporov\u00e9 nebo m\u00edrn\u011b induk\u010dn\u00ed DC z\u00e1t\u011b\u017ee<\/li>\n<li><strong>DC-22B<\/strong> pokr\u00fdv\u00e1 sm\u00ed\u0161en\u00e9 odporov\u00e9 a induk\u010dn\u00ed sp\u00ednac\u00ed podm\u00ednky<\/li>\n<\/ul>\n<p>Pokud va\u0161e aplikace zahrnuje p\u0159\u00edmo\u010dar\u00e9 odporov\u00e9 DC z\u00e1t\u011b\u017ee, m\u016f\u017ee b\u00fdt DC-21B dosta\u010duj\u00edc\u00ed. Pro n\u00e1ro\u010dn\u011bj\u0161\u00ed podm\u00ednky se sm\u00ed\u0161enou z\u00e1t\u011b\u017e\u00ed poskytuje DC-22B siln\u011bj\u0161\u00ed z\u00e1klad.<\/p>\n<h3>PV-specifick\u00e9 kategorie: DC-PV1 a DC-PV2<\/h3>\n<p>Pokud je aplikace specificky sol\u00e1rn\u00ed FV, st\u00e1vaj\u00ed se vysoce relevantn\u00ed dv\u011b dal\u0161\u00ed kategorie:<\/p>\n<ul>\n<li><strong>DC-PV1<\/strong> je spojena se standardn\u00ed FV sp\u00ednac\u00ed z\u00e1t\u011b\u017e\u00ed, kde se neo\u010dek\u00e1v\u00e1, \u017ee by v\u00fdznamn\u00e9 nadproudy dominovaly sp\u00ednac\u00ed ud\u00e1losti<\/li>\n<li><strong>DC-PV2<\/strong> je spojena s n\u00e1ro\u010dn\u011bj\u0161\u00edmi fotovoltaick\u00fdmi sp\u00ednac\u00edmi podm\u00ednkami, v\u010detn\u011b p\u0159\u00edpad\u016f, kdy m\u016f\u017ee b\u00fdt p\u0159\u00edtomen zp\u011btn\u00fd tok proudu nebo z\u00e1va\u017en\u011bj\u0161\u00ed nadproudov\u00e9 podm\u00ednky<\/li>\n<\/ul>\n<p>V mnoha st\u0159e\u0161n\u00edch a komer\u010dn\u00edch FV projektech preferuj\u00ed n\u00e1vrh\u00e1\u0159i <strong>DC-PV2<\/strong> proto\u017ee l\u00e9pe odpov\u00edd\u00e1 n\u00e1ro\u010dn\u011bj\u0161\u00edm fotovoltaick\u00fdm sp\u00ednac\u00edm sc\u00e9n\u00e1\u0159\u016fm. Kone\u010dn\u00e1 volba by se v\u0161ak m\u011bla st\u00e1le \u0159\u00eddit skute\u010dnou architekturou projektu a sp\u00ednac\u00ed z\u00e1t\u011b\u017e\u00ed.<\/p>\n<h3>Praktick\u00e9 srovn\u00e1n\u00ed<\/h3>\n<table style=\"border-collapse: collapse; width: 100%; text-align: left; margin-bottom: 20px;\" border=\"1\" cellspacing=\"0\" cellpadding=\"8\">\n<thead>\n<tr>\n<th>Aplikace<\/th>\n<th>Minim\u00e1ln\u00ed doporu\u010den\u00e1 kategorie<\/th>\n<th>Pro\u010d<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>Jednoduch\u00e1 DC odporov\u00e1 z\u00e1t\u011b\u017e, pr\u016fmyslov\u00fd panel<\/strong><\/td>\n<td>DC-21B<\/td>\n<td>Z\u00e1t\u011b\u017e je p\u0159edv\u00eddateln\u00e1, bez chov\u00e1n\u00ed specifick\u00e9ho pro FV<\/td>\n<\/tr>\n<tr>\n<td><strong>DC motorov\u00fd obvod<\/strong><\/td>\n<td>DC-22B<\/td>\n<td>Induk\u010dn\u00ed z\u00e1t\u011b\u017e vytv\u00e1\u0159\u00ed n\u00e1ro\u010dn\u011bj\u0161\u00ed sp\u00ednac\u00ed podm\u00ednky<\/td>\n<\/tr>\n<tr>\n<td><strong>St\u0159e\u0161n\u00ed FV stringov\u00fd izol\u00e1tor<\/strong><\/td>\n<td>DC-PV1 nebo DC-PV2<\/td>\n<td>PV-specifick\u00e1 z\u00e1t\u011b\u017e; DC-PV2 je \u010dasto preferov\u00e1na tam, kde jsou sp\u00ednac\u00ed podm\u00ednky n\u00e1ro\u010dn\u011bj\u0161\u00ed<\/td>\n<\/tr>\n<tr>\n<td><strong>FV v m\u011b\u0159\u00edtku ve\u0159ejn\u00fdch slu\u017eeb s paraleln\u00edmi stringy<\/strong><\/td>\n<td>\u010casto DC-PV2<\/td>\n<td>Zp\u011btn\u00e9 proudov\u00e9 cesty a vy\u0161\u0161\u00ed poruchov\u00e1 energie obvykle ospravedl\u0148uj\u00ed n\u00e1ro\u010dn\u011bj\u0161\u00ed PV provoz<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>Pro\u010d na tom z\u00e1le\u017e\u00ed, kdy\u017e porovn\u00e1v\u00e1te produkty<\/h3>\n<p>Kupuj\u00edc\u00ed m\u016f\u017ee vid\u011bt dva izol\u00e1tory vedle sebe:<\/p>\n<ul>\n<li><strong>Produkt X:<\/strong> <code>1000 VDC, 32 A, 4P, DC-21B<\/code><\/li>\n<li><strong>Produkt Y:<\/strong> <code>1000 VDC, 32 A, 4P, DC-PV2<\/code><\/li>\n<\/ul>\n<p>Nap\u011bt\u00ed, proud a po\u010det p\u00f3l\u016f jsou identick\u00e9. Produkt X byl ale testov\u00e1n pro obecn\u00fd odporov\u00fd DC provoz, zat\u00edmco produkt Y byl testov\u00e1n specificky pro fotovoltaick\u00e9 sp\u00ednac\u00ed podm\u00ednky. Pro fotovoltaick\u00e9 aplikace je produkt Y \u010dasto vhodn\u011bj\u0161\u00ed volbou, i kdy\u017e se produkt X m\u016f\u017ee na prvn\u00ed pohled zd\u00e1t ekvivalentn\u00ed.<\/p>\n<p>Kategorie vyu\u017eit\u00ed je \u010dasto hranice, kter\u00e1 odd\u011bluje spr\u00e1vn\u00e9 technick\u00e9 rozhodnut\u00ed od povrchn\u00ed shody v katalogu.<\/p>\n<h2>Jak \u010d\u00edst \u0161t\u00edtek se skute\u010dn\u00fdm p\u0159\u00edkladem<\/h2>\n<p>P\u0159edstavte si, \u017ee se d\u00edv\u00e1te na DC izol\u00e1tor ozna\u010den\u00fd takto:<\/p>\n<p><code>1000 VDC, 32 A, 4P, IEC 60947-3, DC-PV2<\/code><\/p>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/Annotated-DC-isolator-switch-label-showing-how-to-identify-key-photovoltaic-ratings.webp\" alt=\"Annotated DC isolator switch label showing how to identify key photovoltaic ratings\" \/><figcaption style=\"font-style: italic; color: #555; margin-top: 8px;\">Anotovan\u00fd pr\u016fvodce rozeb\u00edraj\u00edc\u00ed skute\u010dn\u00fd \u0161t\u00edtek DC odpojova\u010de a jeho kl\u00ed\u010dov\u00e9 fotovoltaick\u00e9 parametry.<\/figcaption><\/figure>\n<p>Zde je to, co v\u00e1m ka\u017ed\u00fd prvek \u0159\u00edk\u00e1:<\/p>\n<ul>\n<li><code>1000 VDC<\/code> \u2014 sp\u00edna\u010d je ur\u010den pro DC syst\u00e9my do 1000 V za uveden\u00fdch podm\u00ednek<\/li>\n<li><code>32 A<\/code> \u2014 m\u016f\u017ee trvale v\u00e9st a\u017e 32 A za definovan\u00fdch podm\u00ednek<\/li>\n<li><code>4P<\/code> \u2014 pou\u017e\u00edv\u00e1 \u010dty\u0159i p\u00f3ly, kter\u00e9 mohou b\u00fdt vy\u017eadov\u00e1ny vnit\u0159n\u00edm uspo\u0159\u00e1d\u00e1n\u00edm sp\u00edn\u00e1n\u00ed nebo architekturou obvodu<\/li>\n<li><code>IEC 60947-3<\/code> \u2014 sp\u00edna\u010d je v souladu s p\u0159\u00edslu\u0161nou normou IEC pro sp\u00edna\u010de-odpojova\u010de<\/li>\n<li><code>DC-PV2<\/code> \u2014 sp\u00edna\u010d byl testov\u00e1n pro n\u00e1ro\u010dn\u011bj\u0161\u00ed fotovoltaick\u00fd sp\u00ednac\u00ed provoz<\/li>\n<\/ul>\n<h3>Technick\u00e9 ov\u011b\u0159en\u00ed<\/h3>\n<p>\u010cten\u00ed \u0161t\u00edtku je pouze prvn\u00edm krokem. Spr\u00e1vn\u00e9 n\u00e1sledn\u00e9 ot\u00e1zky jsou:<\/p>\n<ul>\n<li>jak\u00e9 je m\u00e9 skute\u010dn\u00e9 maxim\u00e1ln\u00ed syst\u00e9mov\u00e9 nap\u011bt\u00ed, v\u010detn\u011b korekce pro n\u00edzk\u00e9 teploty?<\/li>\n<li>jak\u00e9 uspo\u0159\u00e1d\u00e1n\u00ed vodi\u010d\u016f odpojuji a odpov\u00edd\u00e1 konfigurace p\u00f3l\u016f?<\/li>\n<li>jak\u00fd je skute\u010dn\u00fd stav zat\u00ed\u017een\u00ed: odporov\u00fd, induk\u010dn\u00ed nebo specifick\u00fd pro FV?<\/li>\n<li>je tato kategorie vyu\u017eit\u00ed skute\u010dn\u011b vhodn\u00e1 pro tento sp\u00ednac\u00ed provoz?<\/li>\n<\/ul>\n<h2>Rozhodovac\u00ed postup pro v\u00fdb\u011br jmenovit\u00fdch hodnot<\/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-decision-flowchart-for-selecting-a-DC-isolator-switch-based-on-voltage-current-poles-and-utilization-category.webp\" alt=\"Technical decision flowchart for selecting a DC isolator switch based on voltage current poles and utilization category\" \/><figcaption style=\"font-style: italic; color: #555; margin-top: 8px;\">Technick\u00fd v\u00fdvojov\u00fd diagram pro logick\u00fd v\u00fdb\u011br spr\u00e1vn\u00e9ho DC odpojova\u010de na z\u00e1klad\u011b nap\u011bt\u00ed, proudu, p\u00f3l\u016f a kategorie vyu\u017eit\u00ed.<\/figcaption><\/figure>\n<p>P\u0159i v\u00fdb\u011bru DC odpojova\u010de pom\u00e1h\u00e1 strukturovan\u00e9 proch\u00e1zen\u00ed jmenovit\u00fdch hodnot vyhnout se nej\u010dast\u011bj\u0161\u00edm \u00faskal\u00edm.<\/p>\n<h3>Krok 1: Ur\u010dete sv\u00e9 maxim\u00e1ln\u00ed DC nap\u011bt\u00ed<\/h3>\n<p>Vypo\u010d\u00edtejte nejhor\u0161\u00ed p\u0159\u00edpad nap\u011bt\u00ed napr\u00e1zdno pro v\u00e1\u0161 syst\u00e9m, v\u010detn\u011b korekce pro n\u00edzk\u00e9 teploty. Toto \u010d\u00edslo se stane va\u0161\u00edm minim\u00e1ln\u00edm po\u017eadavkem na nap\u011bt\u00ed.<\/p>\n<h3>Krok 2: Potvr\u010fte jmenovit\u00e9 nap\u011bt\u00ed (Ue)<\/h3>\n<p>Zkontrolujte, zda izol\u00e1tor spl\u0148uje nebo p\u0159ekra\u010duje toto \u010d\u00edslo. Pokud ne, je za\u0159\u00edzen\u00ed diskvalifikov\u00e1no bez ohledu na jak\u00e9koli jin\u00e9 jmenovit\u00e9 hodnoty.<\/p>\n<h3>Krok 3: Ov\u011b\u0159te jmenovit\u00fd proud (Ie)<\/h3>\n<p>Zkontrolujte o\u010dek\u00e1van\u00fd provozn\u00ed proud, okoln\u00ed teplotu, nadmo\u0159skou v\u00fd\u0161ku, typ krytu a ve\u0161ker\u00e9 reduk\u010dn\u00ed faktory specifikovan\u00e9 v\u00fdrobcem.<\/p>\n<h3>Krok 4: Zkontrolujte konfiguraci p\u00f3l\u016f<\/h3>\n<p>Potvr\u010fte, \u017ee po\u010det p\u00f3l\u016f odpov\u00edd\u00e1 va\u0161\u00ed architektu\u0159e obvodu a doporu\u010den\u00e9mu sch\u00e9matu zapojen\u00ed v\u00fdrobce.<\/p>\n<h3>Krok 5: Ov\u011b\u0159te kategorii vyu\u017eit\u00ed<\/h3>\n<p>Pro fotovoltaick\u00e9 aplikace hledejte DC-PV1 nebo DC-PV2. Pro obecn\u00e9 DC aplikace potvr\u010fte, \u017ee DC-21B nebo DC-22B odpov\u00edd\u00e1 typu z\u00e1t\u011b\u017ee. Pokud kategorie vyu\u017eit\u00ed chyb\u00ed nebo je nejasn\u00e1, pova\u017eujte to za varovn\u00fd sign\u00e1l.<\/p>\n<h3>Krok 6: Potvr\u010fte standard a z\u00e1klad certifikace<\/h3>\n<p>Za\u0159\u00edzen\u00ed by m\u011blo odkazovat <strong>IEC 60947-3<\/strong> nebo jin\u00fd pou\u017eiteln\u00fd region\u00e1ln\u00ed standard, jako nap\u0159. <strong>UL 98B<\/strong> v severoamerick\u00e9m fotovoltaick\u00e9m kontextu.<\/p>\n<p>Pokud za\u0159\u00edzen\u00ed projde v\u0161emi \u0161esti kontrolami, m\u016f\u017ee postoupit do podrobn\u00e9ho technick\u00e9ho posouzen\u00ed. Pokud sel\u017ee v kter\u00e9mkoli kroku, vra\u0165te se do f\u00e1ze v\u00fdb\u011bru produktu.<\/p>\n<h2>B\u011b\u017en\u00e9 chyby p\u0159i \u010dten\u00ed a jak se jim vyhnout<\/h2>\n<h3>Chyba 1: Nejprve se d\u00edvat na proud<\/h3>\n<p>Toto je nej\u010dast\u011bj\u0161\u00ed komer\u010dn\u00ed chyba. A <code>32 A<\/code> za\u0159\u00edzen\u00ed je schv\u00e1leno pro projekt, i kdy\u017e t\u0159\u00edda nap\u011bt\u00ed nebo sp\u00ednac\u00ed provoz neodpov\u00edd\u00e1 skute\u010dn\u00e9mu syst\u00e9mu.<\/p>\n<p><strong>Jak se tomu vyhnout:<\/strong> v\u017edy za\u010dn\u011bte s nap\u011bt\u00edm. Proud je d\u016fle\u017eit\u00fd, ale z\u00e1le\u017e\u00ed na n\u011bm a\u017e po potvrzen\u00ed vhodnosti nap\u011bt\u00ed.<\/p>\n<h3>Chyba 2: Ignorov\u00e1n\u00ed kategorie vyu\u017eit\u00ed<\/h3>\n<p>Sp\u00edna\u010d se spr\u00e1vn\u00fdm proudem a nap\u011bt\u00edm m\u016f\u017ee b\u00fdt st\u00e1le nevhodn\u00fd, pokud kategorie vyu\u017eit\u00ed neodpov\u00edd\u00e1 skute\u010dn\u00e9mu DC provozu.<\/p>\n<p><strong>Jak se tomu vyhnout:<\/strong> pova\u017eujte kategorii vyu\u017eit\u00ed za povinn\u00e9 krit\u00e9rium v\u00fdb\u011bru, nikoli za voliteln\u00fd \u00fadaj.<\/p>\n<h3>Chyba 3: P\u0159edpoklad, \u017ee v\u00edce p\u00f3l\u016f automaticky znamen\u00e1 lep\u0161\u00ed<\/h3>\n<p>V\u00edce p\u00f3l\u016f automaticky neznamen\u00e1 bezpe\u010dn\u011bj\u0161\u00ed nebo schopn\u011bj\u0161\u00ed sp\u00edna\u010d. Ozna\u010duj\u00ed specifick\u00e9 uspo\u0159\u00e1d\u00e1n\u00ed vnit\u0159n\u00edho a vn\u011bj\u0161\u00edho p\u0159eru\u0161en\u00ed vodi\u010de.<\/p>\n<p><strong>Jak se tomu vyhnout:<\/strong> v\u017edy se \u0159i\u010fte sch\u00e9matem zapojen\u00ed v\u00fdrobce a potvr\u010fte, jak by m\u011bly b\u00fdt p\u00f3ly zapojeny pro va\u0161e specifick\u00e9 uspo\u0159\u00e1d\u00e1n\u00ed obvodu.<\/p>\n<h3>Chyba 4: Pova\u017eov\u00e1n\u00ed zna\u010den\u00ed vypadaj\u00edc\u00edch jako AC za p\u0159ijateln\u00e1 pro DC<\/h3>\n<p>N\u011bkter\u00e9 produkty nesou ozna\u010den\u00ed, kter\u00e1 vypadaj\u00ed obecn\u011b nebo jsou spojena hlavn\u011b s AC aplikacemi. Pokud za\u0159\u00edzen\u00ed nen\u00ed jasn\u011b dimenzov\u00e1no a identifikov\u00e1no pro DC sp\u00ednac\u00ed provoz, postupujte opatrn\u011b.<\/p>\n<p><strong>Jak se tomu vyhnout:<\/strong> hledejte explicitn\u00ed DC nap\u011b\u0165ov\u00e9 zna\u010den\u00ed, DC kategorii vyu\u017eit\u00ed a odkaz na <strong>IEC 60947-3<\/strong> nebo jin\u00fd pou\u017eiteln\u00fd standard relevantn\u00ed pro DC.<\/p>\n<h2>\u010cASTO KLADEN\u00c9 DOTAZY<\/h2>\n<h3>Jak\u00fd je prvn\u00ed parametr, kter\u00fd bych m\u011bl zkontrolovat na DC odpojova\u010di?<\/h3>\n<p>Za\u010dn\u011bte jmenovit\u00fdm nap\u011bt\u00edm, proto\u017ee sp\u00edna\u010d, kter\u00fd m\u00e1 nedostate\u010dn\u00e9 jmenovit\u00e9 nap\u011bt\u00ed pro stejnosm\u011brn\u00fd proud, je okam\u017eit\u011b vy\u0159azen bez ohledu na jeho jmenovit\u00fd proud. U fotovoltaick\u00fdch aplikac\u00ed zkontrolujte maxim\u00e1ln\u00ed Voc korigovan\u00e9 za studena, nikoli pouze jmenovit\u00e9 nap\u011bt\u00ed syst\u00e9mu.<\/p>\n<h3>Co znamen\u00e1 4P na DC odpojova\u010di?<\/h3>\n<p>Znamen\u00e1 to, \u017ee sp\u00edna\u010d pou\u017e\u00edv\u00e1 \u010dty\u0159i p\u00f3ly k odpojen\u00ed obvodu. V DC aplikac\u00edch to \u010dasto ovliv\u0148uje zp\u016fsob veden\u00ed vodi\u010d\u016f a jak\u00e9 nap\u011b\u0165ov\u00e9 uspo\u0159\u00e1d\u00e1n\u00ed sp\u00edna\u010d podporuje.<\/p>\n<h3>Co znamen\u00e1 DC-21B?<\/h3>\n<p>Jedn\u00e1 se o kategorii vyu\u017eit\u00ed IEC, kter\u00e1 ud\u00e1v\u00e1 sp\u00ednac\u00ed povinnost, pro kterou bylo za\u0159\u00edzen\u00ed testov\u00e1no. DC-21B odpov\u00edd\u00e1 odporov\u00e9 nebo m\u00edrn\u011b induktivn\u00ed DC z\u00e1t\u011b\u017ei.<\/p>\n<h3>Co znamen\u00e1 DC-PV1 a DC-PV2 na sol\u00e1rn\u00edm odpojova\u010di?<\/h3>\n<p>Jedn\u00e1 se o kategorie vyu\u017eit\u00ed specifick\u00e9 pro fotovoltaiku pou\u017e\u00edvan\u00e9 v r\u00e1mci normy IEC 60947-3. DC-PV1 pokr\u00fdv\u00e1 standardn\u00ed sp\u00edn\u00e1n\u00ed fotovoltaick\u00fdch syst\u00e9m\u016f, zat\u00edmco DC-PV2 pokr\u00fdv\u00e1 n\u00e1ro\u010dn\u011bj\u0161\u00ed fotovoltaick\u00e9 podm\u00ednky, v\u010detn\u011b sc\u00e9n\u00e1\u0159\u016f zp\u011btn\u00e9ho proudu.<\/p>\n<h3>Je jmenovit\u00fd proud d\u016fle\u017eit\u011bj\u0161\u00ed ne\u017e kategorie vyu\u017eit\u00ed?<\/h3>\n<p>Jmenovit\u00fd proud ud\u00e1v\u00e1, jak\u00e9 zat\u00ed\u017een\u00ed m\u016f\u017ee sp\u00edna\u010d v\u00e9st. Kategorie vyu\u017eit\u00ed ud\u00e1v\u00e1, pro jak\u00fd typ z\u00e1t\u011b\u017ee a sp\u00ednac\u00ed podm\u00ednky byl sp\u00edna\u010d navr\u017een.<\/p>\n<h3>Mohu vyb\u00edrat DC izol\u00e1tor pouze podle amp\u00e9r?<\/h3>\n<p>Ne. Spr\u00e1vn\u00fd v\u00fdb\u011br z\u00e1vis\u00ed tak\u00e9 na maxim\u00e1ln\u00edm stejnosm\u011brn\u00e9m nap\u011bt\u00ed, konfiguraci p\u00f3l\u016f, kategorii vyu\u017eit\u00ed a specifick\u00fdch podm\u00ednk\u00e1ch aplikace.<\/p>\n<h2>Co d\u011blat d\u00e1l<\/h2>\n<p>Nyn\u00ed, kdy\u017e rozum\u00edte tomu, jak \u010d\u00edst jmenovit\u00e9 hodnoty, dal\u0161\u00edm krokem je aplikovat je na v\u00e1\u0161 skute\u010dn\u00fd projekt.<\/p>\n<ul>\n<li>Pokud vyb\u00edr\u00e1te izol\u00e1tor pro konkr\u00e9tn\u00ed projekt, pou\u017eijte v\u00fd\u0161e uveden\u00fd \u0161estikrokov\u00fd rozhodovac\u00ed postup k ov\u011b\u0159en\u00ed ka\u017ed\u00e9ho kandid\u00e1ta podle parametr\u016f va\u0161eho skute\u010dn\u00e9ho syst\u00e9mu.<\/li>\n<li>Pokud pot\u0159ebujete pomoc se zapojen\u00edm, pokra\u010dujte na <a href=\"https:\/\/test.viox.com\/cs\/connection-of-dc-isolators\/\">P\u0159ipojen\u00ed DC odpojova\u010d\u016f<\/a> pro pokyny k zapojen\u00ed p\u00f3l po p\u00f3lu.<\/li>\n<li>Chcete-li si prohl\u00e9dnout specifikace DC izol\u00e1toru VIOX, nav\u0161tivte <a href=\"https:\/\/test.viox.com\/cs\/dc-isolator-switch\/\">produktovou str\u00e1nku DC odpojova\u010de<\/a> pro porovn\u00e1n\u00ed \u00fadaj\u016f o nap\u011bt\u00ed, proudu, p\u00f3lech a kategorii pou\u017eit\u00ed.<\/li>\n<li>Pokud pot\u0159ebujete \u0161ir\u0161\u00ed z\u00e1klady, vra\u0165te se na <a href=\"https:\/\/test.viox.com\/cs\/what-is-a-dc-isolator-switch\/\">Co je stejnosm\u011brn\u00fd izola\u010dn\u00ed sp\u00edna\u010d?<\/a>.<\/li>\n<\/ul>\n<h2>Pou\u017eit\u00e9 zdroje<\/h2>\n<ul>\n<li><a href=\"https:\/\/webstore.iec.ch\/en\/publication\/59785\" rel=\"nofollow noopener\" target=\"_blank\">P\u0159ehled IEC 60947-3:2020<\/a><\/li>\n<li><a href=\"https:\/\/www.shopulstandards.com\/ProductDetail.aspx?UniqueKey=30658\" rel=\"nofollow noopener\" target=\"_blank\">Odkaz na standardn\u00ed \u0159adu UL 98B<\/a><\/li>\n<li><a href=\"https:\/\/electrification.us.abb.com\/products\/switches-disconnects\/otdc-disconnects\" rel=\"nofollow noopener\" target=\"_blank\">Odkaz na odpojova\u010de ABB OTDC s uveden\u00edm jmenovit\u00fdch hodnot DC-PV2<\/a><\/li>\n<li><a href=\"https:\/\/www.socomec.be\/fr\/securiser-le-sectionnement-des-panneaux-photovoltaiques\" rel=\"nofollow noopener\" target=\"_blank\">Pokyny pro fotovoltaick\u00e9 odpojova\u010de Socomec pojedn\u00e1vaj\u00edc\u00ed o DC-PV2<\/a><\/li>\n<\/ul>\n<\/div>\n<div class=\"simg-pop-btn\" style=\"top: 235.828px; left: 14px; display: none;\"><\/div>\n<div class=\"simg-pop-btn\" style=\"top: 235.828px; left: 14px; display: none;\"><\/div>","protected":false},"excerpt":{"rendered":"<p>Direct Answer Reading a DC isolator switch label correctly comes down to four things, checked in this order: Voltage rating \u2014 can the switch safely handle the highest DC voltage in your system? Current rating \u2014 can it carry the expected continuous current without overheating? Pole configuration \u2014 how many conductors does it disconnect at [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":23389,"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-23388","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\/23388","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=23388"}],"version-history":[{"count":1,"href":"https:\/\/test.viox.com\/cs\/wp-json\/wp\/v2\/posts\/23388\/revisions"}],"predecessor-version":[{"id":23390,"href":"https:\/\/test.viox.com\/cs\/wp-json\/wp\/v2\/posts\/23388\/revisions\/23390"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/test.viox.com\/cs\/wp-json\/wp\/v2\/media\/23389"}],"wp:attachment":[{"href":"https:\/\/test.viox.com\/cs\/wp-json\/wp\/v2\/media?parent=23388"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/test.viox.com\/cs\/wp-json\/wp\/v2\/categories?post=23388"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/test.viox.com\/cs\/wp-json\/wp\/v2\/tags?post=23388"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}