{"id":20608,"date":"2025-12-13T00:27:11","date_gmt":"2025-12-12T16:27:11","guid":{"rendered":"https:\/\/viox.com\/?p=20608"},"modified":"2025-12-13T02:05:12","modified_gmt":"2025-12-12T18:05:12","slug":"ue-vs-ui-vs-uimp-voltage-ratings-guide","status":"publish","type":"post","link":"https:\/\/test.viox.com\/cs\/ue-vs-ui-vs-uimp-voltage-ratings-guide\/","title":{"rendered":"Ue vs Ui vs Uimp: Pr\u016fvodce jmenovit\u00fdmi elektrick\u00fdmi nap\u011bt\u00edmi"},"content":{"rendered":"<div class=\"product-intro\">\n<p>Porovn\u00e1v\u00e1te dva jisti\u010de MCCB se shodn\u00fdmi jmenovit\u00fdmi proudy \u2013 oba jsou 100A, t\u0159\u00edp\u00f3lov\u00e9. Ale specifikace nap\u011bt\u00ed se li\u0161\u00ed: jeden uv\u00e1d\u00ed \u201cUe 400V, Ui 690V, Uimp 8kV\u201d, zat\u00edmco druh\u00fd uv\u00e1d\u00ed \u201cUe 690V, Ui 800V, Uimp 6kV\u201d. Kter\u00fd z nich se hod\u00ed pro v\u00e1\u0161 400V t\u0159\u00edf\u00e1zov\u00fd syst\u00e9m? M\u016f\u017eete bezpe\u010dn\u011b pou\u017e\u00edt prvn\u00ed jisti\u010d, i kdy\u017e jeho Ue odpov\u00edd\u00e1 nap\u011bt\u00ed va\u0161eho syst\u00e9mu, ale Uimp je odli\u0161n\u00e9?<\/p>\n<p>Tyto t\u0159i parametry nap\u011bt\u00ed \u2013 Ue, Ui a Uimp \u2013 se objevuj\u00ed v ka\u017ed\u00e9m datov\u00e9m listu elektrick\u00e9ho za\u0159\u00edzen\u00ed od MCCB a <a href=\"https:\/\/test.viox.com\/cs\/ac-contactor\/\">styka\u010de<\/a> na <a href=\"https:\/\/test.viox.com\/cs\/timer-relay\/\">rel\u00e9<\/a> a <a href=\"https:\/\/test.viox.com\/cs\/terminal-block\/\">svorkovnice<\/a>. Ale zmaten\u00ed ohledn\u011b toho, co vlastn\u011b znamenaj\u00ed, vede k nedostate\u010dn\u011b specifikovan\u00e9mu za\u0159\u00edzen\u00ed, kter\u00e9 p\u0159ed\u010dasn\u011b selh\u00e1v\u00e1, k nadm\u011brn\u011b specifikovan\u00fdm komponent\u00e1m, kter\u00e9 pl\u00fdtvaj\u00ed rozpo\u010dtem, a k probl\u00e9m\u016fm s dodr\u017eov\u00e1n\u00edm p\u0159edpis\u016f b\u011bhem schvalov\u00e1n\u00ed projektu.<\/p>\n<p>Probl\u00e9m nen\u00ed jen ve \u010dten\u00ed t\u0159\u00ed \u010d\u00edsel. Ka\u017ed\u00e1 jmenovit\u00e1 hodnota testuje jin\u00e9 elektrick\u00e9 nam\u00e1h\u00e1n\u00ed: ust\u00e1len\u00fd provoz, integritu izolace a odolnost proti p\u0159echodn\u00e9mu p\u0159ep\u011bt\u00ed. \u0158\u00edd\u00ed se r\u016fzn\u00fdmi normami IEC, ov\u011b\u0159uj\u00ed se r\u016fzn\u00fdmi testovac\u00edmi postupy a slou\u017e\u00ed odli\u0161n\u00fdm rol\u00edm p\u0159i v\u00fdb\u011bru za\u0159\u00edzen\u00ed. Pova\u017eovat je za zam\u011bniteln\u00e9 \u2013 nebo je\u0161t\u011b h\u016f\u0159e, ignorovat dva z nich \u2013 vytv\u00e1\u0159\u00ed skute\u010dn\u00e1 bezpe\u010dnostn\u00ed a spolehlivostn\u00ed rizika.<\/p>\n<p>Tato p\u0159\u00edru\u010dka p\u0159esn\u011b dek\u00f3duje v\u0161echny t\u0159i jmenovit\u00e9 hodnoty nap\u011bt\u00ed. Dozv\u00edte se p\u0159esn\u011b, co Ue, Ui a Uimp m\u011b\u0159\u00ed, kter\u00e9 testy IEC ov\u011b\u0159uj\u00ed ka\u017ed\u00fd parametr, jak souvisej\u00ed s normami pro koordinaci izolace, a co je nejd\u016fle\u017eit\u011bj\u0161\u00ed \u2013 kter\u00e1 jmenovit\u00e1 hodnota je d\u016fle\u017eit\u00e1 pro kter\u00e9 rozhodnut\u00ed o specifikaci. Na konci budete \u010d\u00edst datov\u00e9 listy za\u0159\u00edzen\u00ed s jistotou a vyb\u00edrat komponenty, kter\u00e9 odpov\u00eddaj\u00ed jak nap\u011bt\u00ed va\u0161eho syst\u00e9mu, tak kompletn\u00edmu profilu elektrick\u00e9ho nam\u00e1h\u00e1n\u00ed, kter\u00e9mu va\u0161e instalace \u010del\u00ed.<\/p>\n<figure><img decoding=\"async\" src=\"https:\/\/img.viox.com\/three-voltage-ratings-overview-diagram-showing-ue-ui-and-uimp-with-color-coded-sections-and-visual-hierarchy.webp\" alt=\"Three voltage ratings overview diagram showing Ue, Ui, and Uimp\" \/><figcaption><em><em>Obr\u00e1zek 1: Vizu\u00e1ln\u00ed p\u0159ehled t\u0159\u00ed jmenovit\u00fdch hodnot nap\u011bt\u00ed a jejich vztah\u016f. Ue (jmenovit\u00e9 provozn\u00ed nap\u011bt\u00ed) definuje norm\u00e1ln\u00ed provoz, Ui (jmenovit\u00e9 izola\u010dn\u00ed nap\u011bt\u00ed) ur\u010duje n\u00e1vrh izolace a Uimp (jmenovit\u00e9 impulzn\u00ed v\u00fddr\u017en\u00e9 nap\u011bt\u00ed) ov\u011b\u0159uje schopnost ochrany proti p\u0159ep\u011bt\u00ed. Pochopen\u00ed v\u0161ech t\u0159\u00ed je nezbytn\u00e9 pro spr\u00e1vnou specifikaci za\u0159\u00edzen\u00ed.<\/em><\/em>&nbsp;<\/p>\n<\/figcaption><\/figure>\n<h2>Co je Ue (jmenovit\u00e9 provozn\u00ed nap\u011bt\u00ed)?<\/h2>\n<p><strong>Ue<\/strong> (p\u0159\u00edli\u0161 mnoho za\u0159\u00edzen\u00ed) nebo <strong>jmenovit\u00e9 provozn\u00ed nap\u011bt\u00ed<\/strong>\u2013 nap\u011bt\u00ed, p\u0159i kter\u00e9m je elektrick\u00e9 za\u0159\u00edzen\u00ed navr\u017eeno pro provoz za norm\u00e1ln\u00edch, neru\u0161en\u00fdch podm\u00ednek. Toto je \u010d\u00edslo, kter\u00e9 p\u0159i v\u00fdb\u011bru porovn\u00e1v\u00e1te se jmenovit\u00fdm nap\u011bt\u00edm va\u0161eho syst\u00e9mu <a href=\"https:\/\/test.viox.com\/cs\/mccb\/\">MCCB<\/a>, styka\u010d\u016f, rel\u00e9 nebo jin\u00fdch ovl\u00e1dac\u00edch za\u0159\u00edzen\u00ed.<\/p>\n<p>V terminologii IEC 60947 definuje Ue nap\u011b\u0165ovou dom\u00e9nu aplikace za\u0159\u00edzen\u00ed. Funguje ve spojen\u00ed se dv\u011bma dal\u0161\u00edmi kritick\u00fdmi parametry: <strong>Ie<\/strong> (jmenovit\u00fd provozn\u00ed proud) a <strong>kategorie vyu\u017eit\u00ed<\/strong> (jako AC-3 pro motory nebo AC-23 pro sm\u00ed\u0161en\u00e9 z\u00e1t\u011b\u017ee). Spole\u010dn\u011b tyto t\u0159i specifikace popisuj\u00ed ob\u00e1lku provozn\u00edho v\u00fdkonu za\u0159\u00edzen\u00ed.<\/p>\n<h3>Co Ue vlastn\u011b testuje<\/h3>\n<p>Ue neodpov\u00edd\u00e1 specifick\u00e9mu samostatn\u00e9mu testovac\u00edmu nap\u011bt\u00ed. M\u00edsto toho stanovuje referen\u010dn\u00ed nap\u011bt\u00ed pro testov\u00e1n\u00ed v\u00fdkonu:<\/p>\n<ul>\n<li><strong>Testy provozn\u00ed \u017eivotnosti<\/strong>: Za\u0159\u00edzen\u00ed mus\u00ed dokon\u010dit jmenovit\u00e9 provozn\u00ed cykly (zap\u00edn\u00e1n\u00ed a vyp\u00edn\u00e1n\u00ed jmenovit\u00e9ho proudu) p\u0159i Ue bez selh\u00e1n\u00ed<\/li>\n<li><strong>Ov\u011b\u0159en\u00ed n\u00e1r\u016fstu teploty<\/strong>: P\u0159i jmenovit\u00e9m proudu a provozn\u00edm nap\u011bt\u00ed mus\u00ed teploty za\u0159\u00edzen\u00ed z\u016fstat v mez\u00edch<\/li>\n<li><strong>Koordinace v\u00fdkonu<\/strong>: V\u00fdrobci deklaruj\u00ed schopnost sp\u00edn\u00e1n\u00ed proudu, zkratov\u00fd v\u00fdkon a koordina\u010dn\u00ed data p\u0159i specifick\u00fdch hodnot\u00e1ch Ue<\/li>\n<\/ul>\n<p>Pro styka\u010d se jmenovit\u00fdm Ue 400V AC-3 s Ie 95A to znamen\u00e1, \u017ee byl testov\u00e1n na sp\u00edn\u00e1n\u00ed induk\u010dn\u00edch motorov\u00fdch z\u00e1t\u011b\u017e\u00ed 95A p\u0159i 400V pro svou deklarovanou mechanickou a elektrickou \u017eivotnost.<\/p>\n<h3>Typick\u00e9 hodnoty Ue pro pr\u016fmyslov\u00e9 za\u0159\u00edzen\u00ed<\/h3>\n<p>Standardn\u00ed jmenovit\u00e9 hodnoty Ue se \u0159\u00edd\u00ed b\u011b\u017en\u00fdmi syst\u00e9mov\u00fdmi nap\u011bt\u00edmi:<\/p>\n<ul>\n<li><strong>230V \/ 240V AC<\/strong>: Jednof\u00e1zov\u00e9 evropsk\u00e9 a mezin\u00e1rodn\u00ed syst\u00e9my<\/li>\n<li><strong>400V \/ 415V AC<\/strong>: T\u0159\u00edf\u00e1zov\u00e9 evropsk\u00e9, asijsk\u00e9 a mnoho pr\u016fmyslov\u00fdch syst\u00e9m\u016f<\/li>\n<li><strong>480V AC<\/strong>: Severoamerick\u00e9 t\u0159\u00edf\u00e1zov\u00e9 pr\u016fmyslov\u00e9 syst\u00e9my<\/li>\n<li><strong>690 V AC<\/strong>: Vysokonap\u011b\u0165ov\u00e9 pr\u016fmyslov\u00e9 aplikace, d\u016fln\u00ed za\u0159\u00edzen\u00ed<\/li>\n<li><strong>24V \/ 48V \/ 110V DC<\/strong>: \u0158\u00eddic\u00ed obvody, automatiza\u010dn\u00ed syst\u00e9my, instalace s bateriov\u00fdm z\u00e1lohov\u00e1n\u00edm<\/li>\n<\/ul>\n<p>Vyb\u00edr\u00e1te za\u0159\u00edzen\u00ed, kde se deklarovan\u00e9 Ue shoduje nebo p\u0159ekra\u010duje jmenovit\u00e9 nap\u011bt\u00ed va\u0161eho syst\u00e9mu. Za\u0159\u00edzen\u00ed se jmenovit\u00fdm Ue 690V m\u016f\u017ee pracovat v 400V syst\u00e9mu (je pro nap\u011bt\u00ed p\u0159edimenzovan\u00e9), ale za\u0159\u00edzen\u00ed se jmenovit\u00fdm Ue 230V nelze pou\u017e\u00edt v 400V aplikaci \u2013 je poddimenzovan\u00e9.<\/p>\n<h3>Vztah Ue-Ie-Kategorie<\/h3>\n<p>Ue nikdy neexistuje izolovan\u011b. Jisti\u010d MCCB m\u016f\u017ee vykazovat Ue 400V s v\u00edce jmenovit\u00fdmi hodnotami Ie (40A, 63A, 100A) v z\u00e1vislosti na velikosti r\u00e1mu a nastaven\u00ed tepeln\u00e9 spou\u0161t\u011b. Styka\u010d m\u016f\u017ee uv\u00e1d\u011bt r\u016fzn\u00e9 hodnoty Ie p\u0159i r\u016fzn\u00fdch \u00farovn\u00edch Ue \u2013 nap\u0159\u00edklad Ie 95A p\u0159i Ue 400V, ale pouze Ie 80A p\u0159i Ue 690V, proto\u017ee vy\u0161\u0161\u00ed nap\u011bt\u00ed nam\u00e1h\u00e1 kontakty b\u011bhem p\u0159eru\u0161en\u00ed oblouku.<\/p>\n<p>V\u017edy ov\u011b\u0159te v\u0161echny t\u0159i specifikace. Za\u0159\u00edzen\u00ed dimenzovan\u00e9 pro va\u0161e nap\u011bt\u00ed, ale se \u0161patnou kategori\u00ed pou\u017eit\u00ed, m\u016f\u017ee selhat, i kdy\u017e se Ue perfektn\u011b shoduje.<\/p>\n<figure><img decoding=\"async\" src=\"https:\/\/img.viox.com\/mccb-operational-voltage-application-example-showing-steady-state-ac-waveform.webp\" alt=\"MCCB operational voltage application example showing steady-state AC waveform\" \/><figcaption><em>Obr\u00e1zek 2: Ue (jmenovit\u00e9 provozn\u00ed nap\u011bt\u00ed) v kontextu. Tento diagram ukazuje norm\u00e1ln\u00ed provoz 50\/60 Hz AC p\u0159i jmenovit\u00e9m nap\u011bt\u00ed syst\u00e9mu. Ue definuje nap\u011bt\u00ed, p\u0159i kter\u00e9m za\u0159\u00edzen\u00ed prov\u00e1d\u00ed sv\u00e9 jmenovit\u00e9 sp\u00ednac\u00ed a \u017eivotnostn\u00ed schopnosti za trval\u00fdch ust\u00e1len\u00fdch podm\u00ednek.<\/em><\/figcaption><\/figure>\n<h2>Co je Ui (jmenovit\u00e9 izola\u010dn\u00ed nap\u011bt\u00ed)?<\/h2>\n<p><strong>Ui<\/strong> (p\u0159\u00edli\u0161 mnoho za\u0159\u00edzen\u00ed) nebo <strong>jmenovit\u00e9 izola\u010dn\u00ed nap\u011bt\u00ed<\/strong>\u2013 nap\u011b\u0165ov\u00e1 reference pou\u017eit\u00e1 k ur\u010den\u00ed \u00farovn\u00ed dielektrick\u00fdch zkou\u0161ek a minim\u00e1ln\u00edch povrchov\u00fdch cest. Na rozd\u00edl od Ue (kter\u00e9 popisuje provozn\u00ed v\u00fdkon) definuje Ui izola\u010dn\u00ed schopnost za\u0159\u00edzen\u00ed. Nen\u00ed to p\u0159\u00edpustn\u00e9 provozn\u00ed nap\u011bt\u00ed; je to n\u00e1vrhov\u00e1 reference, kter\u00e1 zaji\u0161\u0165uje dostate\u010dnou pevnost izolace.<\/p>\n<p>Z\u00e1kladn\u00ed pravidlo: <strong>Ue nikdy nesm\u00ed p\u0159ekro\u010dit Ui<\/strong>. Datov\u00e9 listy za\u0159\u00edzen\u00ed tento vztah explicitn\u011b ukazuj\u00ed \u2013 styka\u010d se jmenovit\u00fdm Ue 400V bude typicky vykazovat Ui 690V nebo 800V, co\u017e znamen\u00e1, \u017ee m\u016f\u017ee pracovat p\u0159i jak\u00e9mkoli nap\u011bt\u00ed do 400V p\u0159i zachov\u00e1n\u00ed izolace navr\u017een\u00e9 pro \u00farovn\u011b nam\u00e1h\u00e1n\u00ed 690V nebo 800V.<\/p>\n<h3>Co Ui vlastn\u011b testuje: Dielektrick\u00e1 pevnost<\/h3>\n<p>Ui ur\u010duje <strong>dielektrickou zkou\u0161ku v\u00fddr\u017enosti st\u0159\u00eddav\u00e9ho nap\u011bt\u00ed o pr\u016fmyslov\u00e9 frekvenci<\/strong> nap\u011bt\u00ed. Tato zkou\u0161ka ov\u011b\u0159uje, \u017ee izolace vydr\u017e\u00ed trval\u00e9 elektrick\u00e9 nam\u00e1h\u00e1n\u00ed bez poruchy:<\/p>\n<ul>\n<li><strong>Zku\u0161ebn\u00ed nap\u011bt\u00ed<\/strong>: Typicky 2 \u00d7 Ui + 1000V pro za\u0159\u00edzen\u00ed s Ui \u2264 690V (podle IEC 60947-1)<\/li>\n<li><strong>Doba trv\u00e1n\u00ed testu<\/strong>: 60 sekund (1 minuta trval\u00e9ho st\u0159\u00eddav\u00e9ho nap\u011bt\u00ed)<\/li>\n<li><strong>Zku\u0161ebn\u00ed frekvence<\/strong>: 50 Hz nebo 60 Hz AC (pr\u016fmyslov\u00e1 frekvence)<\/li>\n<li><strong>Krit\u00e9ria \u00fasp\u011b\u0161nosti<\/strong>: \u017d\u00e1dn\u00fd ru\u0161iv\u00fd v\u00fdboj, \u017e\u00e1dn\u00fd pr\u016fraz, povrchov\u00fd proud v r\u00e1mci stanoven\u00fdch limit\u016f<\/li>\n<\/ul>\n<p>Nap\u0159\u00edklad svorkovnice se jmenovit\u00fdm Ui 690V podl\u00e9haj\u00ed dielektrick\u00e9 zkou\u0161ce p\u0159ibli\u017en\u011b 2 380V AC po dobu jedn\u00e9 minuty. To simuluje roky st\u00e1rnut\u00ed a nam\u00e1h\u00e1n\u00ed izolace zhu\u0161t\u011bn\u00e9 do jedn\u00e9 \u0159\u00edzen\u00e9 zkou\u0161ky.<\/p>\n<h3>Pro\u010d Ui p\u0159ekra\u010duje Ue: Bezpe\u010dnostn\u00ed rezerva<\/h3>\n<p>Elektrick\u00e9 za\u0159\u00edzen\u00ed za\u017e\u00edv\u00e1 nap\u011b\u0165ov\u00e9 nam\u00e1h\u00e1n\u00ed nad jmenovit\u00e9 \u00farovn\u011b:<\/p>\n<ul>\n<li><strong>P\u0159echodn\u00e1 p\u0159ep\u011bt\u00ed<\/strong>: Sp\u00ednac\u00ed p\u0159ep\u011bt\u00ed, operace s kondenz\u00e1torov\u00fdmi bateriemi<\/li>\n<li><strong>Kol\u00eds\u00e1n\u00ed nap\u011bt\u00ed syst\u00e9mu<\/strong>: Kol\u00eds\u00e1n\u00ed s\u00edt\u011b, probl\u00e9my s regulac\u00ed gener\u00e1toru<\/li>\n<li><strong>St\u00e1rnut\u00ed izolace<\/strong>: Vlhkost, kontaminace, tepeln\u00e9 cyklov\u00e1n\u00ed \u010dasem zhor\u0161uj\u00ed izolaci<\/li>\n<li><strong>Bezpe\u010dnostn\u00ed rezerva<\/strong>: Normy IEC vy\u017eaduj\u00ed izolaci navr\u017eenou pro vy\u0161\u0161\u00ed nam\u00e1h\u00e1n\u00ed, ne\u017e je provozn\u00ed nap\u011bt\u00ed<\/li>\n<\/ul>\n<p>Syst\u00e9m 400 V z\u0159\u00eddka kdy trvale vykazuje p\u0159esn\u011b 400 V. Nap\u011bt\u00ed se m\u016f\u017ee za norm\u00e1ln\u00edch podm\u00ednek pohybovat v rozmez\u00ed \u00b110 %, a p\u0159echodn\u00e9 jevy jej mohou je\u0161t\u011b zv\u00fd\u0161it. Specifikace za\u0159\u00edzen\u00ed s Ui podstatn\u011b vy\u0161\u0161\u00edm ne\u017e Ue zaji\u0161\u0165uje integritu izolace po celou dobu \u017eivotnosti za\u0159\u00edzen\u00ed.<\/p>\n<h3>Po\u017eadavky na Ui a povrchovou vzd\u00e1lenost<\/h3>\n<p>Ui p\u0159\u00edmo ur\u010duje minim\u00e1ln\u00ed <strong>povrchov\u00e9 vzd\u00e1lenosti<\/strong>\u2014nejkrat\u0161\u00ed vzd\u00e1lenost mezi vodiv\u00fdmi \u010d\u00e1stmi m\u011b\u0159en\u00e1 po izola\u010dn\u00edm povrchu. Tabulky v norm\u011b IEC 60664-1 specifikuj\u00ed po\u017eadovanou povrchovou vzd\u00e1lenost na z\u00e1klad\u011b:<\/p>\n<ul>\n<li><strong>Jmenovit\u00e9 izola\u010dn\u00ed nap\u011bt\u00ed (Ui)<\/strong><\/li>\n<li><strong>Stupe\u0148 zne\u010di\u0161t\u011bn\u00ed<\/strong> (\u00farovn\u011b zne\u010di\u0161t\u011bn\u00ed: \u010dist\u00e9, norm\u00e1ln\u00ed, vodiv\u00e9)<\/li>\n<li><strong>Skupiny izola\u010dn\u00edho materi\u00e1lu<\/strong> (odolnost proti plaziv\u00fdm proud\u016fm: I, II, IIIa, IIIb)<\/li>\n<\/ul>\n<p>Vy\u0161\u0161\u00ed Ui vy\u017eaduje v\u011bt\u0161\u00ed povrchovou vzd\u00e1lenost. Svorkovnice pro Ui 1000 V pot\u0159ebuj\u00ed v\u00fdrazn\u011b v\u011bt\u0161\u00ed rozestupy ne\u017e svorkovnice s Ui 400 V, i kdy\u017e ob\u011b pracuj\u00ed ve stejn\u00e9m syst\u00e9mu 400 V. To ovliv\u0148uje fyzickou velikost a hustotu svorek.<\/p>\n<h3>B\u011b\u017en\u00e9 hodnoty Ui<\/h3>\n<p>Standardn\u00ed jmenovit\u00e9 hodnoty Ui pro n\u00edzkonap\u011b\u0165ov\u00e1 za\u0159\u00edzen\u00ed:<\/p>\n<ul>\n<li><strong>300 V<\/strong>: Lehk\u00e1 \u0159\u00eddic\u00ed za\u0159\u00edzen\u00ed, aplikace s ni\u017e\u0161\u00edm nap\u011bt\u00edm<\/li>\n<li><strong>500 V \/ 690 V<\/strong>: Nejb\u011b\u017en\u011bj\u0161\u00ed pro pr\u016fmyslov\u00e9 MCCB, styka\u010de, rel\u00e9 v syst\u00e9mech 400 V \/ 480 V<\/li>\n<li><strong>800 V \/ 1000 V<\/strong>: Vy\u0161\u0161\u00ed izolace pro n\u00e1ro\u010dn\u00e9 aplikace, roz\u0161\u00ed\u0159en\u00fd rozsah nap\u011bt\u00ed<\/li>\n<\/ul>\n<p>V\u017edy ov\u011b\u0159te, zda vybran\u00e9 za\u0159\u00edzen\u00ed vykazuje Ui \u2265 va\u0161e maxim\u00e1ln\u00ed o\u010dek\u00e1van\u00e9 syst\u00e9mov\u00e9 nap\u011bt\u00ed. Pro syst\u00e9m 480 V poskytuje v\u00fdb\u011br komponent s Ui 500 V minim\u00e1ln\u00ed rezervu; Ui 690 V nebo 800 V nab\u00edz\u00ed lep\u0161\u00ed dlouhodobou spolehlivost.<\/p>\n<h2>Co je Uimp (jmenovit\u00e9 impulzn\u00ed v\u00fddr\u017en\u00e9 nap\u011bt\u00ed)?<\/h2>\n<p><strong>Uimp<\/strong> (p\u0159\u00edli\u0161 mnoho za\u0159\u00edzen\u00ed) nebo <strong>jmenovit\u00e9 impulzn\u00ed v\u00fddr\u017en\u00e9 nap\u011bt\u00ed<\/strong>\u2014\u0161pi\u010dkov\u00e1 hodnota nap\u011bt\u00ed, kterou za\u0159\u00edzen\u00ed vydr\u017e\u00ed p\u0159i vystaven\u00ed standardizovan\u00fdm p\u0159echodn\u00fdm p\u0159ep\u011b\u0165ov\u00fdm impuls\u016fm bez poruchy izolace. Zat\u00edmco Ui testuje dielektrickou pevnost p\u0159i pr\u016fmyslov\u00e9 frekvenci, Uimp ov\u011b\u0159uje schopnost za\u0159\u00edzen\u00ed p\u0159e\u017e\u00edt rychl\u00e9, vysoce energetick\u00e9 r\u00e1zy zp\u016fsoben\u00e9 \u00fadery blesku, sp\u00ednac\u00edmi jevy a poruchami v s\u00edti.<\/p>\n<p>Uimp se vyjad\u0159uje v kilovoltech (kV) ve \u0161pi\u010dce a pou\u017e\u00edv\u00e1 standardizovan\u00fd impulsn\u00ed pr\u016fb\u011bh: <strong>1,2\/50 \u03bcs<\/strong> (1,2 mikrosekundy n\u00e1b\u011bh na \u0161pi\u010dku, 50 mikrosekund pokles na polovinu hodnoty). Tento pr\u016fb\u011bh simuluje elektrick\u00fd podpis r\u00e1z\u016f indukovan\u00fdch bleskem a sp\u00ednac\u00edch p\u0159echodn\u00fdch jev\u016f.<\/p>\n<h3>Co Uimp skute\u010dn\u011b testuje: Odolnost proti r\u00e1z\u016fm<\/h3>\n<p>Test impulzn\u00ed v\u00fddr\u017ee vystavuje za\u0159\u00edzen\u00ed vysokonap\u011b\u0165ov\u00fdm p\u0159echodn\u00fdm impuls\u016fm:<\/p>\n<ul>\n<li><strong>Testovac\u00ed pr\u016fb\u011bh<\/strong>: Nap\u011b\u0165ov\u00fd impuls 1,2\/50 \u03bcs (standardn\u00ed tvar IEC)<\/li>\n<li><strong>Zku\u0161ebn\u00ed nap\u011bt\u00ed<\/strong>: Deklarovan\u00e9 Uimp za\u0159\u00edzen\u00ed (6 kV, 8 kV, 12 kV atd.)<\/li>\n<li><strong>Zku\u0161ebn\u00ed postup<\/strong>: Aplikov\u00e1no v\u00edce impuls\u016f s ob\u011bma polaritami (kladnou a z\u00e1pornou)<\/li>\n<li><strong>Interval mezi impulsy<\/strong>: Minim\u00e1ln\u011b 1 sekunda<\/li>\n<li><strong>Krit\u00e9ria \u00fasp\u011b\u0161nosti<\/strong>: \u017d\u00e1dn\u00fd p\u0159eskok, \u017e\u00e1dn\u00fd pr\u016fraz izolace, \u017e\u00e1dn\u00e1 degradace vzdu\u0161n\u00fdch vzd\u00e1lenost\u00ed<\/li>\n<\/ul>\n<p>U jisti\u010de s jmenovit\u00fdm Uimp 8 kV testovac\u00ed in\u017een\u00fd\u0159i opakovan\u011b aplikuj\u00ed impulsy o \u0161pi\u010dkov\u00e9m nap\u011bt\u00ed 8 000 volt\u016f, aby ov\u011b\u0159ili, \u017ee vnit\u0159n\u00ed vzdu\u0161n\u00e9 vzd\u00e1lenosti a izolace vydr\u017e\u00ed tato p\u0159echodn\u00e1 nam\u00e1h\u00e1n\u00ed bez poruchy.<\/p>\n<h3>Spojen\u00ed s kategori\u00ed p\u0159ep\u011bt\u00ed<\/h3>\n<p>Hodnoty Uimp nejsou libovoln\u00e9\u2014jsou koordinov\u00e1ny s <strong>kategoriemi p\u0159ep\u011bt\u00ed<\/strong> definovan\u00fdmi v IEC 60664-1. Tyto kategorie klasifikuj\u00ed instalace podle jejich vystaven\u00ed p\u0159echodn\u00fdm p\u0159ep\u011bt\u00edm:<\/p>\n<ul>\n<li><strong>Kategorie I<\/strong>: Za\u0159\u00edzen\u00ed se sn\u00ed\u017een\u00fdm vystaven\u00edm p\u0159echodn\u00fdm jev\u016fm (chr\u00e1n\u011bn\u00e9 elektronick\u00e9 obvody)<\/li>\n<li><strong>Kategorie II<\/strong>: Spot\u0159ebi\u010de a p\u0159enosn\u00e1 za\u0159\u00edzen\u00ed (typick\u00e9 reziden\u010dn\u00ed z\u00e1t\u011b\u017ee)<\/li>\n<li><strong>Kategorie III<\/strong>: Pevn\u00e9 instalace (rozvodn\u00e9 panely, pr\u016fmyslov\u00e9 stroje)<\/li>\n<li><strong>Kategorie IV<\/strong>: Po\u010d\u00e1tek instalace (vstup do budovy, elektrom\u011bry, venkovn\u00ed veden\u00ed)<\/li>\n<\/ul>\n<p>Vy\u0161\u0161\u00ed kategorie \u010del\u00ed z\u00e1va\u017en\u011bj\u0161\u00edm p\u0159echodn\u00fdm jev\u016fm. Tabulky v IEC 60664-1 mapuj\u00ed jmenovit\u00e1 nap\u011bt\u00ed syst\u00e9mu na po\u017eadovan\u00e9 \u00farovn\u011b impulzn\u00ed v\u00fddr\u017ee pro ka\u017edou kategorii. Pro t\u0159\u00edf\u00e1zov\u00fd syst\u00e9m 400 V:<\/p>\n<ul>\n<li><strong>Kategorie II<\/strong>: Uimp 2,5 kV typicky<\/li>\n<li><strong>Kategorie III<\/strong>: Uimp 6 kV typicky<\/li>\n<li><strong>Kategorie IV<\/strong>: Uimp 8 kV typicky<\/li>\n<\/ul>\n<p>Pr\u016fmyslov\u00e9 za\u0159\u00edzen\u00ed instalovan\u00e9 v pevn\u00fdch rozvodn\u00fdch syst\u00e9mech (kategorie III) pot\u0159ebuje vy\u0161\u0161\u00ed Uimp ne\u017e spot\u0159ebi\u010de zapojen\u00e9 do z\u00e1suvek (kategorie II), i kdy\u017e ob\u011b pracuj\u00ed p\u0159i stejn\u00e9m jmenovit\u00e9m nap\u011bt\u00ed.<\/p>\n<h3>Typick\u00e9 hodnoty Uimp pro pr\u016fmyslov\u00e9 za\u0159\u00edzen\u00ed<\/h3>\n<p>Standardn\u00ed jmenovit\u00e9 hodnoty Uimp pro n\u00edzkonap\u011b\u0165ov\u00e9 sp\u00ednac\u00ed a \u0159\u00eddic\u00ed za\u0159\u00edzen\u00ed:<\/p>\n<ul>\n<li><strong>4 kV<\/strong>: Aplikace ni\u017e\u0161\u00ed kategorie, reziden\u010dn\u00ed za\u0159\u00edzen\u00ed<\/li>\n<li><strong>6 kV<\/strong>: B\u011b\u017en\u00e9 pro dom\u00e1c\u00ed\/reziden\u010dn\u00ed MCCB, za\u0159\u00edzen\u00ed kategorie II\/III<\/li>\n<li><strong>8 kV<\/strong>: Standard pro pr\u016fmyslov\u00e9 MCCB, styka\u010de, pevn\u00e9 instalace kategorie III\/IV<\/li>\n<li><strong>12 kV<\/strong>: N\u00e1ro\u010dn\u00e9 pr\u016fmyslov\u00e9 aplikace, za\u0159\u00edzen\u00ed pro energetiku, lokality s vysok\u00fdm vystaven\u00edm<\/li>\n<\/ul>\n<p>Datov\u00e9 listy za\u0159\u00edzen\u00ed obvykle uv\u00e1d\u011bj\u00ed hodnoty Uimp odpov\u00eddaj\u00edc\u00ed zam\u00fd\u0161len\u00e9 kategorii instalace. Pr\u016fmyslov\u00e9 komponenty maj\u00ed standardn\u011b 8 kV nebo vy\u0161\u0161\u00ed, zat\u00edmco reziden\u010dn\u00ed produkty mohou vykazovat 4-6 kV.<\/p>\n<h3>Pro\u010d z\u00e1le\u017e\u00ed na Uimp: Skute\u010dn\u00e9 r\u00e1zov\u00e9 ud\u00e1losti<\/h3>\n<p>Elektrick\u00e9 syst\u00e9my pravideln\u011b \u010del\u00ed p\u0159echodn\u00fdm p\u0159ep\u011bt\u00edm:<\/p>\n<ul>\n<li><strong>\u00dadery blesku<\/strong>: P\u0159\u00edm\u00e9 nebo bl\u00edzk\u00e9 \u00fadery indukuj\u00ed p\u0159ep\u011bt\u00ed vysok\u00e9ho nap\u011bt\u00ed do distribu\u010dn\u00edch s\u00edt\u00ed<\/li>\n<li><strong>Sp\u00ednac\u00ed operace<\/strong>: Otev\u00edr\u00e1n\u00ed\/zav\u00edr\u00e1n\u00ed velk\u00fdch z\u00e1t\u011b\u017e\u00ed, kondenz\u00e1torov\u00fdch bateri\u00ed nebo transform\u00e1tor\u016f vytv\u00e1\u0159\u00ed nap\u011b\u0165ov\u00e9 \u0161pi\u010dky<\/li>\n<li><strong>Poruchy v s\u00edti<\/strong>: Odstra\u0148ov\u00e1n\u00ed poruch a op\u011btovn\u00e9 zap\u00edn\u00e1n\u00ed generuj\u00ed p\u0159echodn\u00e9 jevy<\/li>\n<li><strong>Spou\u0161t\u011bn\u00ed motoru<\/strong>: Sp\u00edn\u00e1n\u00ed induktivn\u00ed z\u00e1t\u011b\u017ee vytv\u00e1\u0159\u00ed lokalizovan\u00e9 nap\u011b\u0165ov\u00e9 \u0161pi\u010dky<\/li>\n<\/ul>\n<p>Za\u0159\u00edzen\u00ed s nedostate\u010dn\u00fdm Uimp selh\u00e1vaj\u00ed nep\u0159edv\u00eddateln\u011b \u2013 n\u011bkdy ihned po bou\u0159ce, jindy po kumulativn\u00edm po\u0161kozen\u00ed p\u0159ep\u011bt\u00edm, kter\u00e9 oslabuje izolaci po dobu m\u011bs\u00edc\u016f. Spr\u00e1vn\u00e1 specifikace Uimp zaji\u0161\u0165uje, \u017ee za\u0159\u00edzen\u00ed p\u0159e\u017eije p\u0159echodn\u00e9 prost\u0159ed\u00ed specifick\u00e9 pro jeho m\u00edsto instalace a kategorii.<\/p>\n<figure><img decoding=\"async\" src=\"https:\/\/img.viox.com\/ui-vs-uimp-testing-comparison-showing-different-test-methods-and-waveforms.webp\" alt=\"Ui vs Uimp testing comparison showing different test methods and waveforms\" \/><figcaption><em>Obr\u00e1zek 3: Srovn\u00e1n\u00ed testovac\u00edch metod mezi Ui a Uimp. Testov\u00e1n\u00ed Ui aplikuje trval\u00e9 st\u0159\u00eddav\u00e9 nap\u011bt\u00ed 50\/60 Hz po dobu 60 sekund k ov\u011b\u0159en\u00ed dielektrick\u00e9 pevnosti p\u0159i pr\u016fmyslov\u00e9m kmito\u010dtu. Testov\u00e1n\u00ed Uimp aplikuje rychl\u00e9 impulsn\u00ed p\u0159ep\u011bt\u00ed 1,2\/50 \u03bcs k ov\u011b\u0159en\u00ed odolnosti proti p\u0159echodn\u00fdm jev\u016fm. Ka\u017ed\u00e9 jmenovit\u00e9 nap\u011bt\u00ed testuje z\u00e1sadn\u011b odli\u0161n\u00e9 elektrick\u00e9 nam\u00e1h\u00e1n\u00ed.<\/em><\/figcaption><\/figure>\n<h2>Kl\u00ed\u010dov\u00e9 rozd\u00edly: Ue vs Ui vs Uimp<\/h2>\n<p>Tyto t\u0159i jmenovit\u00e9 hodnoty nap\u011bt\u00ed m\u011b\u0159\u00ed z\u00e1sadn\u011b odli\u0161n\u00e9 elektrick\u00e9 nam\u00e1h\u00e1n\u00ed. Pochopen\u00ed jejich rozd\u00edl\u016f zabra\u0148uje chyb\u00e1m ve specifikac\u00edch a pom\u00e1h\u00e1 v\u00e1m sladit za\u0159\u00edzen\u00ed se skute\u010dn\u00fdmi provozn\u00edmi podm\u00ednkami.<\/p>\n<h3>Provozn\u00ed vs. Izola\u010dn\u00ed vs. P\u0159ep\u011b\u0165ov\u00e9: R\u016fzn\u00e9 ot\u00e1zky<\/h3>\n<p>Ka\u017ed\u00e1 jmenovit\u00e1 hodnota odpov\u00edd\u00e1 na konkr\u00e9tn\u00ed konstruk\u010dn\u00ed ot\u00e1zku:<\/p>\n<ul>\n<li><strong>Ue (Provozn\u00ed nap\u011bt\u00ed)<\/strong>: \u201cV jak\u00e9m syst\u00e9mov\u00e9m nap\u011bt\u00ed m\u016f\u017ee toto za\u0159\u00edzen\u00ed pracovat za norm\u00e1ln\u00edch, trval\u00fdch podm\u00ednek?\u201d<\/li>\n<li><strong>Ui (Izola\u010dn\u00ed nap\u011bt\u00ed)<\/strong>: \u201cJak\u00e9 referen\u010dn\u00ed nap\u011bt\u00ed ur\u010duje izola\u010dn\u00ed pevnost a povrchov\u00e9 cesty tohoto za\u0159\u00edzen\u00ed?\u201d<\/li>\n<li><strong>Uimp (Impulsn\u00ed v\u00fddr\u017en\u00e9 nap\u011bt\u00ed)<\/strong>: \u201cJak\u00e9 maxim\u00e1ln\u00ed p\u0159echodn\u00e9 nap\u011bt\u00ed m\u016f\u017ee toto za\u0159\u00edzen\u00ed p\u0159e\u017e\u00edt bez poru\u0161en\u00ed izolace?\u201d<\/li>\n<\/ul>\n<p>Jsou dopl\u0148kov\u00e9, nikoli zam\u011bniteln\u00e9. Nem\u016f\u017eete nahradit Ui za Ue a vysok\u00e9 Uimp nekompenzuje nedostate\u010dn\u00e9 Ue. V\u0161echny t\u0159i se mus\u00ed shodovat s po\u017eadavky va\u0161\u00ed aplikace.<\/p>\n<h3>Rozd\u00edly v testovac\u00edch metod\u00e1ch<\/h3>\n<table>\n<tbody>\n<tr>\n<td><strong>Hodnocen\u00ed<\/strong><\/td>\n<td><strong>Typ testu<\/strong><\/td>\n<td><strong>Testovac\u00ed nap\u011bt\u00ed<\/strong><\/td>\n<td><strong>Trv\u00e1n\u00ed<\/strong><\/td>\n<td><strong>Co ov\u011b\u0159uje<\/strong><\/td>\n<\/tr>\n<tr>\n<td><strong>Ue<\/strong><\/td>\n<td>Testy provozn\u00edho v\u00fdkonu<\/td>\n<td>Jmenovit\u00e9 nap\u011bt\u00ed syst\u00e9mu<\/td>\n<td>Tis\u00edce cykl\u016f<\/td>\n<td>Sp\u00ednac\u00ed schopnost, \u017eivotnost, n\u00e1r\u016fst teploty<\/td>\n<\/tr>\n<tr>\n<td><strong>Ui<\/strong><\/td>\n<td>Dielektrick\u00e1 v\u00fddr\u017e p\u0159i pr\u016fmyslov\u00e9m kmito\u010dtu<\/td>\n<td>~2 \u00d7 Ui + 1000 V AC<\/td>\n<td>60 sekund<\/td>\n<td>Integrita izolace proti trval\u00e9mu st\u0159\u00eddav\u00e9mu nam\u00e1h\u00e1n\u00ed<\/td>\n<\/tr>\n<tr>\n<td><strong>Uimp<\/strong><\/td>\n<td>Impulsn\u00ed v\u00fddr\u017en\u00fd test<\/td>\n<td>Jmenovit\u00e1 impulsn\u00ed kV \u0161pi\u010dka<\/td>\n<td>Mikrosekundy (opakovan\u00e9 v\u00fdst\u0159ely)<\/td>\n<td>Dostate\u010dn\u00e1 vzd\u00e1lenost proti rychl\u00fdm p\u0159echodn\u00fdm p\u0159ep\u011bt\u00edm<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Testy Ui pou\u017e\u00edvaj\u00ed st\u0159\u00eddav\u00e9 nap\u011bt\u00ed 50\/60 Hz trvaj\u00edc\u00ed jednu minutu \u2013 pomal\u00e9, drtiv\u00e9 nam\u00e1h\u00e1n\u00ed izolace. Testy Uimp pou\u017e\u00edvaj\u00ed impulsy 1,2\/50 \u03bcs \u2013 rychl\u00e9, ostr\u00e9 nap\u011b\u0165ov\u00e9 \u0161pi\u010dky, kter\u00e9 odli\u0161n\u011b nam\u00e1haj\u00ed vzd\u00e1lenosti a vzduchov\u00e9 mezery. \u00dasp\u011b\u0161n\u00e9 absolvov\u00e1n\u00ed jednoho testu nezaru\u010duje \u00fasp\u011b\u0161n\u00e9 absolvov\u00e1n\u00ed druh\u00e9ho.<\/p>\n<h3>Vztahy velikosti nap\u011bt\u00ed<\/h3>\n<p>Typick\u00e9 za\u0159\u00edzen\u00ed vykazuje specifickou hierarchii nap\u011bt\u00ed:<\/p>\n<p><strong>Ue \u2264 Ui &lt; Uimp<\/strong><\/p>\n<p>P\u0159\u00edklad: Pr\u016fmyslov\u00fd MCCB pro syst\u00e9m 400 V m\u016f\u017ee vykazovat:<\/p>\n<ul>\n<li>Ue = 400 V (provozn\u00ed nap\u011bt\u00ed odpov\u00edd\u00e1 syst\u00e9mu)<\/li>\n<li>Ui = 690 V (izolace navr\u017eena pro vy\u0161\u0161\u00ed nam\u00e1h\u00e1n\u00ed)<\/li>\n<li>Uimp = 8 kV (impulsn\u00ed v\u00fddr\u017e pro instalace kategorie III)<\/li>\n<\/ul>\n<p>V\u0161imn\u011bte si \u0159\u00e1du: Ue a Ui jsou ve stovk\u00e1ch volt\u016f, zat\u00edmco Uimp sk\u00e1\u010de do tis\u00edc\u016f volt\u016f. To odr\u00e1\u017e\u00ed odli\u0161nou povahu p\u0159echodn\u00fdch p\u0159ep\u011bt\u00ed oproti ust\u00e1len\u00e9mu provozu.<\/p>\n<h3>Kter\u00e1 jmenovit\u00e1 hodnota \u0159\u00edd\u00ed kter\u00e9 rozhodnut\u00ed?<\/h3>\n<p>R\u016fzn\u00e1 rozhodnut\u00ed o specifikac\u00edch z\u00e1vis\u00ed na r\u016fzn\u00fdch jmenovit\u00fdch hodnot\u00e1ch:<\/p>\n<p><strong>Pou\u017eijte Ue k ur\u010den\u00ed:<\/strong><\/p>\n<ul>\n<li>Kompatibilita syst\u00e9mu (odpov\u00edd\u00e1 za\u0159\u00edzen\u00ed va\u0161emu jmenovit\u00e9mu nap\u011bt\u00ed?)<\/li>\n<li>Koordinace jmenovit\u00e9ho proudu (hodnoty Ie deklarovan\u00e9 p\u0159i specifick\u00fdch \u00farovn\u00edch Ue)<\/li>\n<li>Pou\u017eitelnost kategorie vyu\u017eit\u00ed (AC-3, AC-23 atd.)<\/li>\n<li>Paraleln\u00ed\/s\u00e9riov\u00e9 konfigurace (\u00favahy o sd\u00edlen\u00ed nap\u011bt\u00ed)<\/li>\n<\/ul>\n<p><strong>Pou\u017eijte Ui k ov\u011b\u0159en\u00ed:<\/strong><\/p>\n<ul>\n<li>Dostate\u010dn\u00e1 bezpe\u010dnostn\u00ed rezerva izolace (Ui by m\u011bla v\u00fdrazn\u011b p\u0159ekra\u010dovat Ue)<\/li>\n<li>Soulad s po\u017eadavky na povrchov\u00e9 cesty pro stupe\u0148 zne\u010di\u0161t\u011bn\u00ed<\/li>\n<li>Dlouhodob\u00e1 spolehlivost izolace ve va\u0161em prost\u0159ed\u00ed<\/li>\n<li>Vhodnost za\u0159\u00edzen\u00ed v r\u016fzn\u00fdch rozsaz\u00edch nap\u011bt\u00ed (jedno za\u0159\u00edzen\u00ed, v\u00edce aplikac\u00ed)<\/li>\n<\/ul>\n<p><strong>Pou\u017eijte Uimp k zaji\u0161t\u011bn\u00ed:<\/strong><\/p>\n<ul>\n<li>Ochrana proti p\u0159echodn\u00fdm p\u0159ep\u011bt\u00edm pro kategorii p\u0159ep\u011bt\u00ed instalace<\/li>\n<li>Koordinace s p\u0159ed\u0159azen\u00fdmi p\u0159ep\u011b\u0165ov\u00fdmi ochrann\u00fdmi za\u0159\u00edzen\u00edmi<\/li>\n<li>Dostate\u010dn\u00fd n\u00e1vrh vzd\u00e1lenost\u00ed pro m\u00edsta s vysokou expozic\u00ed<\/li>\n<li>Soulad s normami pro koordinaci izolace (IEC 60664-1)<\/li>\n<\/ul>\n<figure><img decoding=\"async\" src=\"https:\/\/img.viox.com\/voltage-ratings-comparison-table-showing-definitions-test-methods-and-applications.webp\" alt=\"Voltage ratings comparison table showing definitions, test methods, and applications\" \/><figcaption><em>Obr\u00e1zek 4: Rychl\u00e9 referen\u010dn\u00ed srovn\u00e1n\u00ed Ue, Ui a Uimp. Tato tabulka shrnuje kl\u00ed\u010dov\u00e9 rozd\u00edly mezi t\u0159emi jmenovit\u00fdmi hodnotami nap\u011bt\u00ed a pom\u00e1h\u00e1 in\u017een\u00fdr\u016fm rychle identifikovat, kter\u00e1 jmenovit\u00e1 hodnota \u0159\u00edd\u00ed konkr\u00e9tn\u00ed rozhodnut\u00ed o specifikac\u00edch. V\u0161echny t\u0159i mus\u00ed b\u00fdt ov\u011b\u0159eny pro kompletn\u00ed specifikaci za\u0159\u00edzen\u00ed.<\/em><\/figcaption><\/figure>\n<h2>Normy IEC a po\u017eadavky na testov\u00e1n\u00ed<\/h2>\n<p>Tyto t\u0159i jmenovit\u00e9 hodnoty nap\u011bt\u00ed nejsou libovoln\u00e1 tvrzen\u00ed v\u00fdrobce \u2013 \u0159\u00edd\u00ed se p\u0159\u00edsn\u00fdmi mezin\u00e1rodn\u00edmi normami IEC, kter\u00e9 definuj\u00ed testovac\u00ed postupy, minim\u00e1ln\u00ed v\u00fdkonnostn\u00ed krit\u00e9ria a po\u017eadavky na dokumentaci.<\/p>\n<h3>\u0158ada IEC 60947: Sp\u00ednac\u00ed a \u0159\u00eddic\u00ed p\u0159\u00edstroje nn<\/h3>\n<p>\u0158ada IEC 60947 poskytuje z\u00e1klad pro definice jmenovit\u00e9ho nap\u011bt\u00ed v r\u00e1mci <a href=\"https:\/\/test.viox.com\/cs\/mccb\/\">MCCB<\/a>, <a href=\"https:\/\/test.viox.com\/cs\/modular-contactor-manufacturer\/\">styka\u010de<\/a>, <a href=\"https:\/\/test.viox.com\/cs\/timer-relay\/\">rel\u00e9<\/a>, motorov\u00fdch spou\u0161t\u011b\u010d\u016f a \u0159\u00eddic\u00edch za\u0159\u00edzen\u00ed:<\/p>\n<ul>\n<li><strong>IEC 60947-1<\/strong>: Obecn\u00e1 pravidla stanovuj\u00edc\u00ed definice Ue, Ui, Uimp, po\u017eadavky na koordinaci izolace a zku\u0161ebn\u00ed postupy platn\u00e9 pro v\u0161echny n\u00edzkonap\u011b\u0165ov\u00e9 sp\u00ednac\u00ed a \u0159\u00eddic\u00ed p\u0159\u00edstroje<\/li>\n<li><strong>IEC 60947-2<\/strong>: Specifick\u00e9 po\u017eadavky pro jisti\u010de (MCCB, ACB), v\u010detn\u011b vyp\u00ednac\u00ed schopnosti p\u0159i zkratu, kategori\u00ed selektivity a aplikace jmenovit\u00e9ho nap\u011bt\u00ed<\/li>\n<li><strong>IEC 60947-4-1<\/strong>: Styka\u010de a motorov\u00e9 spou\u0161t\u011b\u010de, definuj\u00edc\u00ed kategorie pou\u017eit\u00ed (AC-3, AC-4 atd.) a jak Ue souvis\u00ed se sp\u00ednac\u00ed schopnost\u00ed motoru<\/li>\n<li><strong>IEC 60947-5-1<\/strong>: Obvody \u0159\u00eddic\u00edch za\u0159\u00edzen\u00ed a sp\u00ednac\u00ed prvky (koncov\u00e9 sp\u00edna\u010de, p\u0159ep\u00edna\u010de, tla\u010d\u00edtka)<\/li>\n<\/ul>\n<p>V\u0161echny \u010d\u00e1sti odkazuj\u00ed na IEC 60947-1 pro z\u00e1kladn\u00ed definice jmenovit\u00e9ho nap\u011bt\u00ed a pot\u00e9 p\u0159id\u00e1vaj\u00ed podrobnosti o zkou\u0161k\u00e1ch specifick\u00e9 pro dan\u00fd produkt.<\/p>\n<h3>IEC 60947-7-1: Svorkovnice pro m\u011bd\u011bn\u00e9 vodi\u010de<\/h3>\n<p>Svorkovnice se \u0159\u00edd\u00ed souvisej\u00edc\u00edmi normami:<\/p>\n<ul>\n<li><strong>IEC 60947-7-1<\/strong>: Definuje oteplen\u00ed, dielektrickou pevnost (ov\u011b\u0159uj\u00edc\u00ed Ui), odolnost proti zkratov\u00e9mu proudu a impulzn\u00ed zkou\u0161ky (ov\u011b\u0159uj\u00edc\u00ed Uimp) pro svorkovnice<\/li>\n<li><strong>Testov\u00e1n\u00ed zahrnuje<\/strong>: Dielektrick\u00e1 zkou\u0161ka st\u0159\u00eddav\u00fdm nap\u011bt\u00edm (60 sekund p\u0159i zku\u0161ebn\u00edm nap\u011bt\u00ed odvozen\u00e9m od Ui) a zkou\u0161ka impulzn\u00edm nap\u011bt\u00edm (vlna 1,2\/50 \u03bcs p\u0159i jmenovit\u00e9m Uimp)<\/li>\n<\/ul>\n<p>Svorkovnice pou\u017e\u00edvaj\u00ed stejn\u00fd z\u00e1kladn\u00ed r\u00e1mec Ui a Uimp jako MCCB a styka\u010de, co\u017e zaji\u0161\u0165uje konzistenci koordinace izolace nap\u0159\u00ed\u010d v\u0161emi komponentami panelu.<\/p>\n<h3>IEC 60664-1: Koordinace izolace v n\u00edzkonap\u011b\u0165ov\u00fdch syst\u00e9mech<\/h3>\n<p>IEC 60664-1 poskytuje in\u017een\u00fdrsk\u00e9 tabulky, kter\u00e9 propojuj\u00ed syst\u00e9mov\u00e9 nap\u011bt\u00ed s po\u017eadovan\u00fdm Uimp a vzdu\u0161n\u00fdmi vzd\u00e1lenostmi:<\/p>\n<ul>\n<li><strong>Kategorie p\u0159ep\u011bt\u00ed<\/strong> (I a\u017e IV) klasifikuj\u00ed vystaven\u00ed instalace p\u0159echodn\u00fdm jev\u016fm<\/li>\n<li><strong>Stupn\u011b zne\u010di\u0161t\u011bn\u00ed<\/strong> (1 a\u017e 4) klasifikuj\u00ed \u00farovn\u011b zne\u010di\u0161t\u011bn\u00ed prost\u0159ed\u00ed<\/li>\n<li><strong>Tabulky jmenovit\u00e9ho impulzn\u00edho nap\u011bt\u00ed<\/strong>: Mapuj\u00ed jmenovit\u00e9 syst\u00e9mov\u00e9 nap\u011bt\u00ed a kategorii p\u0159ep\u011bt\u00ed na minim\u00e1ln\u00ed po\u017eadovan\u00e9 Uimp<\/li>\n<li><strong>Tabulky vzdu\u0161n\u00fdch a povrchov\u00fdch vzd\u00e1lenost\u00ed<\/strong>: Specifikuj\u00ed minim\u00e1ln\u00ed vzd\u00e1lenosti vzduchem a po povrchu na z\u00e1klad\u011b Ui, stupn\u011b zne\u010di\u0161t\u011bn\u00ed a skupiny izola\u010dn\u00edho materi\u00e1lu<\/li>\n<\/ul>\n<p>In\u017een\u00fd\u0159i pou\u017e\u00edvaj\u00ed IEC 60664-1 k ur\u010den\u00ed, jak\u00e9 Uimp a vzdu\u0161n\u00e9 vzd\u00e1lenosti jejich aplikace vy\u017eaduje, a pot\u00e9 vyberou za\u0159\u00edzen\u00ed s datov\u00fdmi listy, kter\u00e9 vykazuj\u00ed odpov\u00eddaj\u00edc\u00ed hodnoty.<\/p>\n<h3>IEC 61810-1: Elektromechanick\u00e1 rel\u00e9<\/h3>\n<p>Elektromechanick\u00e1 rel\u00e9 se \u0159\u00edd\u00ed vlastn\u00ed normou, ale pou\u017e\u00edvaj\u00ed identick\u00e9 koncepty jmenovit\u00e9ho nap\u011bt\u00ed:<\/p>\n<ul>\n<li><strong>IEC 61810-1<\/strong>: Definuje Ue (sp\u00ednac\u00ed nap\u011bt\u00ed), Ui (izola\u010dn\u00ed nap\u011bt\u00ed) a Uimp (odolnost proti impulzn\u00edmu nap\u011bt\u00ed) pro kontakty a c\u00edvky rel\u00e9<\/li>\n<li><strong>Zku\u0161ebn\u00ed postupy<\/strong>: Dielektrick\u00e9 zkou\u0161ky st\u0159\u00eddav\u00fdm nap\u011bt\u00edm a impulzn\u00ed zkou\u0161ky zrcadl\u00ed metodiku IEC 60947-1<\/li>\n<\/ul>\n<p>Rel\u00e9 s jmenovit\u00fdm Ue 400V, Ui 690V, Uimp 6 kV pou\u017e\u00edv\u00e1 stejn\u00fd interpreta\u010dn\u00ed r\u00e1mec jako MCCB s t\u011bmito hodnotami \u2013 li\u0161\u00ed se pouze typ produktu.<\/p>\n<h3>Typov\u00e9 zkou\u0161ky vs. kusov\u00e9 zkou\u0161ky<\/h3>\n<p>Validace jmenovit\u00e9ho nap\u011bt\u00ed zahrnuje dv\u011b \u00farovn\u011b zkou\u0161ek:<\/p>\n<p><strong>Typov\u00e9 zkou\u0161ky<\/strong> (prov\u00e1d\u00ed se jednou pro ka\u017ed\u00fd n\u00e1vrh):<\/p>\n<ul>\n<li>Komplexn\u00ed validace v\u010detn\u011b dielektrick\u00e9 pevnosti, impulzn\u00edch zkou\u0161ek, oteplen\u00ed, cykl\u016f \u017eivotnosti<\/li>\n<li>Prov\u00e1d\u00ed se na reprezentativn\u00edch vzorc\u00edch v akreditovan\u00fdch zku\u0161ebn\u00edch laborato\u0159\u00edch<\/li>\n<li>V\u00fdsledky jsou dokumentov\u00e1ny v protokolech o typov\u00fdch zkou\u0161k\u00e1ch a publikov\u00e1ny v datov\u00fdch listech<\/li>\n<li>N\u00e1kladn\u00e9, \u010dasov\u011b n\u00e1ro\u010dn\u00e9 \u2013 v\u00fdrobci neopakuj\u00ed pro ka\u017edou v\u00fdrobn\u00ed jednotku<\/li>\n<\/ul>\n<p><strong>Kusov\u00e9 zkou\u0161ky<\/strong> (prov\u00e1d\u00ed se na ka\u017ed\u00e9 jednotce nebo v\u00fdrobn\u00ed d\u00e1vce):<\/p>\n<ul>\n<li>Z\u00e1kladn\u00ed ov\u011b\u0159en\u00ed: vizu\u00e1ln\u00ed kontrola, rozm\u011brov\u00e9 kontroly, zjednodu\u0161en\u00e1 dielektrick\u00e1 zkou\u0161ka (ni\u017e\u0161\u00ed nap\u011bt\u00ed, krat\u0161\u00ed trv\u00e1n\u00ed)<\/li>\n<li>Zaji\u0161\u0165uje konzistenci v\u00fdroby bez opakov\u00e1n\u00ed cel\u00e9 sady typov\u00fdch zkou\u0161ek<\/li>\n<li>Rychl\u00e1, n\u00e1kladov\u011b efektivn\u00ed kontrola kvality<\/li>\n<\/ul>\n<p>Kdy\u017e si p\u0159e\u010dtete datov\u00fd list s \u00fadaji Ue, Ui a Uimp, tyto hodnoty p\u0159edstavuj\u00ed typov\u011b testovan\u00fd a certifikovan\u00fd v\u00fdkon. Kusov\u00e9 zkou\u0161ky potvrzuj\u00ed, \u017ee ka\u017ed\u00e1 v\u00fdrobn\u00ed jednotka spl\u0148uje typov\u011b testovan\u00fd n\u00e1vrh.<\/p>\n<h2>Praktick\u00fd pr\u016fvodce v\u00fdb\u011brem: Spr\u00e1vn\u00e9 pou\u017e\u00edv\u00e1n\u00ed jmenovit\u00fdch nap\u011bt\u00ed<\/h2>\n<p>V\u00fdb\u011br za\u0159\u00edzen\u00ed s odpov\u00eddaj\u00edc\u00edmi jmenovit\u00fdmi nap\u011bt\u00edmi vy\u017eaduje systematick\u00fd p\u0159\u00edstup. Postupujte podle tohoto rozhodovac\u00edho r\u00e1mce, abyste sladili jmenovit\u00e9 hodnoty s po\u017eadavky va\u0161\u00ed instalace.<\/p>\n<h3>Krok 1: Identifikujte jmenovit\u00e9 nap\u011bt\u00ed va\u0161eho syst\u00e9mu<\/h3>\n<p>Za\u010dn\u011bte se z\u00e1kladn\u00edmi fakty o syst\u00e9mu:<\/p>\n<ul>\n<li><strong>Jednof\u00e1zov\u00e9 syst\u00e9my<\/strong>: 120V, 230V, 240V AC<\/li>\n<li><strong>T\u0159\u00edf\u00e1zov\u00e9 syst\u00e9my<\/strong>: 208V, 380V, 400V, 415V, 480V, 600V, 690V AC<\/li>\n<li><strong>DC syst\u00e9my<\/strong>: 24V, 48V, 110V, 220V DC (b\u011b\u017en\u00e9 v \u0159\u00eddic\u00edch\/bateriov\u00fdch aplikac\u00edch)<\/li>\n<\/ul>\n<p>Toto je v\u00e1\u0161 <strong>minim\u00e1ln\u00ed po\u017eadavek na Ue<\/strong>. Za\u0159\u00edzen\u00ed s Ue ni\u017e\u0161\u00edm, ne\u017e je nap\u011bt\u00ed va\u0161eho syst\u00e9mu, nelze pou\u017e\u00edt; za\u0159\u00edzen\u00ed s Ue rovn\u00fdm nebo vy\u0161\u0161\u00edm, ne\u017e je nap\u011bt\u00ed syst\u00e9mu, je p\u0159ijateln\u00e9 z hlediska provozn\u00edho nap\u011bt\u00ed.<\/p>\n<h3>Krok 2: Ur\u010dete kategorii p\u0159ep\u011bt\u00ed instalace<\/h3>\n<p>Pro klasifikaci va\u0161\u00ed instalace se pora\u010fte s IEC 60664-1 nebo m\u00edstn\u00edmi elektrotechnick\u00fdmi p\u0159edpisy:<\/p>\n<p><strong>Kategorie I<\/strong>: Citliv\u00e9 elektronick\u00e9 za\u0159\u00edzen\u00ed s m\u00edstn\u00ed ochranou proti p\u0159ep\u011bt\u00ed (vz\u00e1cn\u00e9 v pr\u016fmyslov\u00fdch aplikac\u00edch)<\/p>\n<p><strong>Kategorie II<\/strong>: Obvody spot\u0159ebi\u010d\u016f a z\u00e1suvek, p\u0159enosn\u00e9 za\u0159\u00edzen\u00ed alespo\u0148 10 metr\u016f od zdroj\u016f kategorie III (reziden\u010dn\u00ed, lehk\u00e9 komer\u010dn\u00ed)<\/p>\n<p><strong>Kategorie III<\/strong>: Pevn\u00e9 za\u0159\u00edzen\u00ed v budov\u00e1ch, rozvodn\u00e9 panely, pr\u016fmyslov\u00e9 stroje (nejb\u011b\u017en\u011bj\u0161\u00ed pr\u016fmyslov\u00e1 aplikace)<\/p>\n<p><strong>Kategorie IV<\/strong>: Po\u010d\u00e1tek instalace, za\u0159\u00edzen\u00ed vstupn\u00edho veden\u00ed, elektrom\u011bry, nadzemn\u00ed veden\u00ed<\/p>\n<p>Kategorie va\u0161\u00ed instalace ur\u010duje <strong>minim\u00e1ln\u00ed po\u017eadovan\u00e9 Uimp<\/strong>. Pro syst\u00e9m 400V:<\/p>\n<ul>\n<li>Kategorie II \u2192 Uimp \u2265 2,5 kV<\/li>\n<li>Kategorie III \u2192 Uimp \u2265 6 kV (\u010dasto specifikov\u00e1no jako 8 kV pro lep\u0161\u00ed rezervu)<\/li>\n<li>Kategorie IV \u2192 Uimp \u2265 8 kV<\/li>\n<\/ul>\n<h3>Krok 3: Posouzen\u00ed stupn\u011b zne\u010di\u0161t\u011bn\u00ed prost\u0159ed\u00ed<\/h3>\n<p>Vyhodno\u0165te \u00farovn\u011b zne\u010di\u0161t\u011bn\u00ed podle IEC 60664-1:<\/p>\n<ul>\n<li><strong>Stupe\u0148 zne\u010di\u0161t\u011bn\u00ed 1<\/strong>: \u010cist\u00e9 prost\u0159ed\u00ed, uzav\u0159en\u00e9 kryty (vz\u00e1cn\u00e9)<\/li>\n<li><strong>Stupe\u0148 zne\u010di\u0161t\u011bn\u00ed 2<\/strong>: Norm\u00e1ln\u00ed vnit\u0159n\u00ed podm\u00ednky, pouze nevodiv\u00e9 zne\u010di\u0161t\u011bn\u00ed (v\u011bt\u0161ina rozvad\u011b\u010d\u016f)<\/li>\n<li><strong>Stupe\u0148 zne\u010di\u0161t\u011bn\u00ed 3<\/strong>: Vodiv\u00e9 zne\u010di\u0161t\u011bn\u00ed nebo such\u00e9 nevodiv\u00e9 zne\u010di\u0161t\u011bn\u00ed, kter\u00e9 se st\u00e1v\u00e1 vodiv\u00fdm, kdy\u017e je mokr\u00e9 (pr\u016fmyslov\u00e9 prost\u0159ed\u00ed, venkovn\u00ed instalace)<\/li>\n<li><strong>Stupe\u0148 zne\u010di\u0161t\u011bn\u00ed 4<\/strong>: Trval\u00e9 vodiv\u00e9 zne\u010di\u0161t\u011bn\u00ed de\u0161t\u011bm, sn\u011bhem nebo siln\u00e9 zne\u010di\u0161t\u011bn\u00ed<\/li>\n<\/ul>\n<p>Vy\u0161\u0161\u00ed stupn\u011b zne\u010di\u0161t\u011bn\u00ed vy\u017eaduj\u00ed za\u0159\u00edzen\u00ed s v\u011bt\u0161\u00edmi povrchov\u00fdmi cestami, co\u017e znamen\u00e1 vy\u0161\u0161\u00ed jmenovit\u00e9 hodnoty Ui pro stejnou schopnost vzduchov\u00e9 vzd\u00e1lenosti. Syst\u00e9m 400 V ve stupni zne\u010di\u0161t\u011bn\u00ed 3 pot\u0159ebuje v\u011bt\u0161\u00ed povrchovou cestu ne\u017e stejn\u00e9 nap\u011bt\u00ed ve stupni 2.<\/p>\n<h3>Krok 4: Vyberte za\u0159\u00edzen\u00ed Ui s dostate\u010dnou rezervou<\/h3>\n<p><strong>Obecn\u00e9 pravidlo<\/strong>: Specifikujte za\u0159\u00edzen\u00ed s Ui alespo\u0148 1,5\u00d7 jmenovit\u00e9 nap\u011bt\u00ed va\u0161eho syst\u00e9mu, nejl\u00e9pe vy\u0161\u0161\u00ed.<\/p>\n<p>Pro b\u011b\u017en\u00e9 syst\u00e9my:<\/p>\n<ul>\n<li><strong>400V t\u0159\u00edf\u00e1zov\u00fd syst\u00e9m<\/strong>: Specifikujte Ui \u2265 690V (1,73\u00d7 rezerva)<\/li>\n<li><strong>480V t\u0159\u00edf\u00e1zov\u00fd syst\u00e9m<\/strong>: Specifikujte Ui \u2265 690V nebo 800V<\/li>\n<li><strong>230V jednof\u00e1zov\u00fd syst\u00e9m<\/strong>: Specifikujte Ui \u2265 400V nebo 500V<\/li>\n<\/ul>\n<p>Tato rezerva zohled\u0148uje kol\u00eds\u00e1n\u00ed nap\u011bt\u00ed, p\u0159echodn\u00e1 p\u0159ep\u011bt\u00ed a st\u00e1rnut\u00ed izolace b\u011bhem \u017eivotnosti za\u0159\u00edzen\u00ed.<\/p>\n<h3>Krok 5: Ov\u011b\u0159te, zda Uimp odpov\u00edd\u00e1 kategorii instalace<\/h3>\n<p>Zkontrolujte datov\u00e9 listy za\u0159\u00edzen\u00ed s va\u0161\u00ed kategori\u00ed instalace z kroku 2:<\/p>\n<ul>\n<li>Zajist\u011bte, aby deklarovan\u00e9 Uimp \u2265 minimum IEC 60664-1 pro nap\u011bt\u00ed a kategorii va\u0161eho syst\u00e9mu<\/li>\n<li>Pr\u016fmyslov\u00e9 pevn\u00e9 instalace (kategorie III) obvykle pot\u0159ebuj\u00ed Uimp minim\u00e1ln\u011b 6-8 kV<\/li>\n<li>Nepodce\u0148ujte specifikaci, abyste u\u0161et\u0159ili n\u00e1klady \u2013 poruchy zp\u016fsoben\u00e9 p\u0159ep\u011bt\u00edm jsou nep\u0159edv\u00eddateln\u00e9 a n\u00e1kladn\u00e9<\/li>\n<\/ul>\n<h3>Krok 6: Ov\u011b\u0159te jmenovit\u00e9 proudy p\u0159i zvolen\u00e9m Ue<\/h3>\n<p>Jmenovit\u00e9 proudy za\u0159\u00edzen\u00ed (Ie, In) jsou deklarov\u00e1ny p\u0159i specifick\u00fdch hodnot\u00e1ch Ue. Ov\u011b\u0159te, \u017ee:<\/p>\n<ul>\n<li>Jmenovit\u00fd proud je dostate\u010dn\u00fd pro va\u0161e zat\u00ed\u017een\u00ed <strong>p\u0159i deklarovan\u00e9m Ue<\/strong><\/li>\n<li>Pokud za\u0159\u00edzen\u00ed uv\u00e1d\u00ed v\u00edce mo\u017enost\u00ed Ue, zkontrolujte, zda se proud p\u0159i zvolen\u00e9m nap\u011bt\u00ed nesni\u017euje<\/li>\n<li>Zejm\u00e9na styka\u010de vykazuj\u00ed sn\u00ed\u017een\u00e9 Ie p\u0159i vy\u0161\u0161\u00edch \u00farovn\u00edch Ue \u2013 nep\u0159edpokl\u00e1dejte, \u017ee proud z\u016fst\u00e1v\u00e1 konstantn\u00ed<\/li>\n<\/ul>\n<h3>Krok 7: Dokumentujte v\u00fdb\u011bry pro ov\u011b\u0159en\u00ed shody<\/h3>\n<p>Udr\u017eujte z\u00e1znam specifikac\u00ed, kter\u00fd ukazuje:<\/p>\n<ul>\n<li>Jmenovit\u00e9 nap\u011bt\u00ed syst\u00e9mu a kategorie instalace<\/li>\n<li>Zvolen\u00e9 hodnoty Ue, Ui, Uimp za\u0159\u00edzen\u00ed<\/li>\n<li>Stupe\u0148 zne\u010di\u0161t\u011bn\u00ed a po\u017eadovan\u00e9 povrchov\u00e9 cesty<\/li>\n<li>Od\u016fvodn\u011bn\u00ed jak\u00fdchkoli odchylek od standardn\u00ed praxe<\/li>\n<\/ul>\n<p>Tato dokumentace podporuje schvalovac\u00ed procesy, inspek\u010dn\u00ed kontroly a budouc\u00ed rozhodnut\u00ed o \u00fadr\u017eb\u011b\/v\u00fdm\u011bn\u011b.<\/p>\n<h3>Souhrn v\u00fdvojov\u00e9ho diagramu rozhodov\u00e1n\u00ed<\/h3>\n<ol>\n<li><strong>Syst\u00e9mov\u00e9 nap\u011bt\u00ed<\/strong> \u2192 Definuje minim\u00e1ln\u00ed Ue<\/li>\n<li><strong>Kategorie instalace<\/strong> (IEC 60664-1) \u2192 Definuje minim\u00e1ln\u00ed Uimp<\/li>\n<li><strong>Stupe\u0148 zne\u010di\u0161t\u011bn\u00ed<\/strong> + <strong>Nap\u011bt\u00ed<\/strong> \u2192 Definuje po\u017eadovanou povrchovou cestu (ov\u011b\u0159uje v\u00fdb\u011br Ui)<\/li>\n<li><strong>Charakteristiky zat\u00ed\u017een\u00ed<\/strong> + <strong>Ue<\/strong> \u2192 Definuje po\u017eadovan\u00e9 Ie a kategorii vyu\u017eit\u00ed<\/li>\n<li><strong>Zkontrolujte v\u0161echna jmenovit\u00e1 hodnocen\u00ed<\/strong> \u2192 Zaji\u0161\u0165uje Ue \u2264 Ui, Uimp adekv\u00e1tn\u00ed, proud dostate\u010dn\u00fd<\/li>\n<\/ol>\n<p>Pokud je jak\u00e9koli jmenovit\u00e9 hodnocen\u00ed okrajov\u00e9 nebo nejasn\u00e9, specifikujte dal\u0161\u00ed vy\u0161\u0161\u00ed standardn\u00ed jmenovit\u00e9 hodnocen\u00ed. Rozd\u00edl v n\u00e1kladech je minim\u00e1ln\u00ed ve srovn\u00e1n\u00ed s poruchami v ter\u00e9nu a nouzov\u00fdmi v\u00fdm\u011bnami.<\/p>\n<figure><img decoding=\"async\" src=\"https:\/\/img.viox.com\/equipment-selection-decision-framework-flowchart-for-voltage-ratings.webp\" alt=\"Equipment selection decision framework flowchart for voltage ratings\" \/><figcaption><em>Obr\u00e1zek 5: Systematick\u00fd p\u0159\u00edstup ke specifikaci jmenovit\u00e9ho nap\u011bt\u00ed za\u0159\u00edzen\u00ed. Tento rozhodovac\u00ed r\u00e1mec provede in\u017een\u00fdry cel\u00fdm procesem v\u00fdb\u011bru: slad\u011bn\u00ed Ue s nap\u011bt\u00edm syst\u00e9mu, ov\u011b\u0159en\u00ed Ui pro izola\u010dn\u00ed rezervu, ov\u011b\u0159en\u00ed Uimp proti kategorii instalace a potvrzen\u00ed jmenovit\u00fdch proud\u016f. Dodr\u017eov\u00e1n\u00ed tohoto strukturovan\u00e9ho p\u0159\u00edstupu zaji\u0161\u0165uje spr\u00e1vnou specifikaci v\u0161ech parametr\u016f nap\u011bt\u00ed.<\/em><\/figcaption><\/figure>\n<h2>B\u011b\u017en\u00e9 chyby ve specifikaci, kter\u00fdm je t\u0159eba se vyhnout<\/h2>\n<p>I zku\u0161en\u00ed in\u017een\u00fd\u0159i d\u011blaj\u00ed chyby v jmenovit\u00e9m nap\u011bt\u00ed, kdy\u017e pracuj\u00ed pod \u010dasov\u00fdm tlakem nebo se zab\u00fdvaj\u00ed nezn\u00e1m\u00fdmi typy za\u0159\u00edzen\u00ed. Zde jsou nej\u010dast\u011bj\u0161\u00ed chyby a jak se jim vyhnout.<\/p>\n<h3>Chyba 1: Pou\u017e\u00edv\u00e1n\u00ed pouze Ue a ignorov\u00e1n\u00ed Ui\/Uimp<\/h3>\n<p><strong>Chyba<\/strong>: Specifikace za\u0159\u00edzen\u00ed pouze na z\u00e1klad\u011b Ue odpov\u00eddaj\u00edc\u00edho nap\u011bt\u00ed syst\u00e9mu, bez kontroly Ui a Uimp.<\/p>\n<p><strong>Pro\u010d je to \u0161patn\u011b<\/strong>: Ue potvrzuje provozn\u00ed kompatibilitu, ale ne\u0159\u00edk\u00e1 nic o pevnosti izolace nebo odolnosti proti p\u0159ep\u011bt\u00ed. Za\u0159\u00edzen\u00ed se spr\u00e1vn\u00fdm Ue, ale nedostate\u010dn\u00fdm Uimp sel\u017ee nep\u0159edv\u00eddateln\u011b po p\u0159echodn\u00fdch ud\u00e1lostech.<\/p>\n<p><strong>Spr\u00e1vn\u00fd p\u0159\u00edstup<\/strong>: V\u017edy ov\u011b\u0159te v\u0161echna t\u0159i jmenovit\u00e1 hodnocen\u00ed. Pro syst\u00e9m 400 V zkontrolujte, zda Ue \u2265 400 V <strong>a<\/strong> Ui \u2265 690 V <strong>a<\/strong> Uimp \u2265 6-8 kV (v z\u00e1vislosti na kategorii instalace).<\/p>\n<h3>Chyba 2: Pova\u017eov\u00e1n\u00ed Ui za maxim\u00e1ln\u00ed provozn\u00ed nap\u011bt\u00ed<\/h3>\n<p><strong>Chyba<\/strong>: P\u0159edpoklad, \u017ee za\u0159\u00edzen\u00ed s jmenovit\u00fdm Ui 690 V m\u016f\u017ee nep\u0159etr\u017eit\u011b pracovat p\u0159i 690 V.<\/p>\n<p><strong>Pro\u010d je to \u0161patn\u011b<\/strong>: Ui je referen\u010dn\u00ed nap\u011bt\u00ed izolace, nikoli provozn\u00ed limit. Z\u00e1kladn\u00ed pravidlo je Ue \u2264 Ui \u2013 provozn\u00ed nap\u011bt\u00ed nesm\u00ed p\u0159ekro\u010dit deklarovan\u00e9 Ue, bez ohledu na hodnotu Ui.<\/p>\n<p><strong>Spr\u00e1vn\u00fd p\u0159\u00edstup<\/strong>: Sla\u010fte nap\u011bt\u00ed syst\u00e9mu s Ue, nikoli s Ui. Pro syst\u00e9m 690 V vyberte za\u0159\u00edzen\u00ed s jmenovit\u00fdm Ue 690 V (nebo vy\u0161\u0161\u00edm) s Ui 800 V nebo 1000 V. Nepou\u017e\u00edvejte za\u0159\u00edzen\u00ed s jmenovit\u00fdm Ue 400 V jen proto, \u017ee jeho Ui je 690 V.<\/p>\n<h3>Chyba 3: P\u0159ehl\u00ed\u017een\u00ed kategorie instalace p\u0159i v\u00fdb\u011bru Uimp<\/h3>\n<p><strong>Chyba<\/strong>: Specifikace za\u0159\u00edzen\u00ed pro obytn\u00e9 budovy (Uimp 4-6 kV) pro pr\u016fmyslov\u00e9 pevn\u00e9 instalace (kategorie III).<\/p>\n<p><strong>Pro\u010d je to \u0161patn\u011b<\/strong>: IEC 60664-1 vy\u017eaduje vy\u0161\u0161\u00ed Uimp pro instalace bl\u00ed\u017ee k po\u010d\u00e1tku elektrick\u00e9ho nap\u00e1jen\u00ed. Pr\u016fmyslov\u00e1 prost\u0159ed\u00ed kategorie III \u010del\u00ed z\u00e1va\u017en\u011bj\u0161\u00edm p\u0159echodov\u00fdm jev\u016fm ne\u017e obvody spot\u0159ebi\u010d\u016f kategorie II. Za\u0159\u00edzen\u00ed s nedostate\u010dn\u00fdm Uimp trp\u00ed kumulativn\u00ed degradac\u00ed izolace a neo\u010dek\u00e1van\u00fdmi poruchami.<\/p>\n<p><strong>Spr\u00e1vn\u00fd p\u0159\u00edstup<\/strong>: Nejprve ur\u010dete kategorii instalace a pot\u00e9 vyberte za\u0159\u00edzen\u00ed s odpov\u00eddaj\u00edc\u00edm Uimp. Pro v\u011bt\u0161inu pr\u016fmyslov\u00fdch aplikac\u00ed (kategorie III) specifikujte Uimp \u2265 8 kV. Pro za\u0159\u00edzen\u00ed vstupn\u00edho veden\u00ed (kategorie IV) pou\u017eijte Uimp \u2265 12 kV.<\/p>\n<h3>Chyba 4: Ignorov\u00e1n\u00ed vlivu stupn\u011b zne\u010di\u0161t\u011bn\u00ed na povrchovou cestu<\/h3>\n<p><strong>Chyba<\/strong>: V\u00fdb\u011br za\u0159\u00edzen\u00ed pouze na z\u00e1klad\u011b jmenovit\u00fdch hodnot nap\u011bt\u00ed bez zohledn\u011bn\u00ed zne\u010di\u0161t\u011bn\u00ed prost\u0159ed\u00ed.<\/p>\n<p><strong>Pro\u010d je to \u0161patn\u011b<\/strong>: Vy\u0161\u0161\u00ed stupn\u011b zne\u010di\u0161t\u011bn\u00ed vy\u017eaduj\u00ed v\u011bt\u0161\u00ed povrchov\u00e9 cesty mezi vodiv\u00fdmi \u010d\u00e1stmi. Za\u0159\u00edzen\u00ed vhodn\u00e9 pro stupe\u0148 zne\u010di\u0161t\u011bn\u00ed 2 (\u010dist\u00e1 ovl\u00e1dac\u00ed sk\u0159\u00ed\u0148) m\u016f\u017ee m\u00edt nedostate\u010dnou povrchovou cestu pro stupe\u0148 3 (pr\u016fmyslov\u00e9 prost\u0159ed\u00ed s prachem\/vlhkost\u00ed). To zp\u016fsobuje selh\u00e1n\u00ed v d\u016fsledku plaziv\u00fdch proud\u016f a p\u0159eskok\u016f.<\/p>\n<p><strong>Spr\u00e1vn\u00fd p\u0159\u00edstup<\/strong>: Poctiv\u011b zhodno\u0165te prost\u0159ed\u00ed (v\u011bt\u0161ina pr\u016fmyslov\u00fdch provoz\u016f je stupe\u0148 3, nikoli stupe\u0148 2), a pot\u00e9 vyberte za\u0159\u00edzen\u00ed s odpov\u00eddaj\u00edc\u00edm Ui a ov\u011b\u0159en\u00fdmi povrchov\u00fdmi cestami pro v\u00e1\u0161 stupe\u0148 zne\u010di\u0161t\u011bn\u00ed. V p\u0159\u00edpad\u011b pochybnost\u00ed specifikujte dal\u0161\u00ed vy\u0161\u0161\u00ed jmenovitou hodnotu Ui, abyste zajistili dostate\u010dnou vzd\u00e1lenost.<\/p>\n<h3>Chyba 5: P\u0159edpoklad, \u017ee jmenovit\u00e9 hodnoty proudu jsou nez\u00e1visl\u00e9 na nap\u011bt\u00ed<\/h3>\n<p><strong>Chyba<\/strong>: V\u00fdb\u011br styka\u010de se jmenovit\u00fdm proudem Ie 95 A p\u0159i Ue 400 V a o\u010dek\u00e1v\u00e1n\u00ed stejn\u00e9 kapacity 95 A p\u0159i Ue 690 V.<\/p>\n<p><strong>Pro\u010d je to \u0161patn\u011b<\/strong>: Vy\u0161\u0161\u00ed nap\u011bt\u00ed z\u00e1va\u017en\u011bji nam\u00e1haj\u00ed p\u0159eru\u0161en\u00ed oblouku kontaktu. Styka\u010de a sp\u00edna\u010de obvykle vykazuj\u00ed sn\u00ed\u017eenou proudovou zat\u00ed\u017eitelnost p\u0159i vy\u0161\u0161\u00edch nap\u011bt\u00edch. Datov\u00e9 listy uv\u00e1d\u011bj\u00ed v\u00edce kombinac\u00ed Ue\/Ie \u2013 hodnota Ie kles\u00e1 s rostouc\u00edm Ue.<\/p>\n<p><strong>Spr\u00e1vn\u00fd p\u0159\u00edstup<\/strong>: V\u017edy \u010dt\u011bte jmenovit\u00e9 hodnoty proudu p\u0159i va\u0161em specifick\u00e9m provozn\u00edm nap\u011bt\u00ed. Pokud navrhujete pro provoz p\u0159i 690 V, pou\u017eijte hodnotu Ie deklarovanou p\u0159i Ue 690 V, nikoli (vy\u0161\u0161\u00ed) hodnotu deklarovanou p\u0159i Ue 400 V.<\/p>\n<h3>Chyba 6: Kombinov\u00e1n\u00ed za\u0159\u00edzen\u00ed pro obytn\u00e9 a pr\u016fmyslov\u00e9 pou\u017eit\u00ed<\/h3>\n<p><strong>Chyba<\/strong>: Specifikov\u00e1n\u00ed jisti\u010d\u016f MCCB pro obytn\u00e9 budovy (jmenovit\u00e9 Uimp 6 kV) v pr\u016fmyslov\u00fdch ovl\u00e1dac\u00edch panelech, aby se u\u0161et\u0159ily n\u00e1klady.<\/p>\n<p><strong>Pro\u010d je to \u0161patn\u011b<\/strong>: Za\u0159\u00edzen\u00ed pro obytn\u00e9 budovy jsou testov\u00e1na a certifikov\u00e1na pro aplikace kategorie II s ni\u017e\u0161\u00edm vystaven\u00edm p\u0159echodov\u00fdm jev\u016fm. Pr\u016fmyslov\u00e1 prost\u0159ed\u00ed (kategorie III\/IV) p\u0159ekra\u010duj\u00ed konstruk\u010dn\u00ed ob\u00e1lku za\u0159\u00edzen\u00ed pro obytn\u00e9 budovy. Kombinov\u00e1n\u00ed komponent pro obytn\u00e9 a pr\u016fmyslov\u00e9 pou\u017eit\u00ed vytv\u00e1\u0159\u00ed mezery v koordinaci a probl\u00e9my s dodr\u017eov\u00e1n\u00edm p\u0159edpis\u016f.<\/p>\n<p><strong>Spr\u00e1vn\u00fd p\u0159\u00edstup<\/strong>: Sla\u010fte t\u0159\u00eddu za\u0159\u00edzen\u00ed s typem instalace. Pou\u017e\u00edvejte komponenty pr\u016fmyslov\u00e9 t\u0159\u00eddy (minim\u00e1ln\u011b Uimp 8 kV) pro tov\u00e1rny, z\u00e1vody a pevn\u00e9 instalace budov. Za\u0159\u00edzen\u00ed pro obytn\u00e9 budovy (Uimp 4-6 kV) si vyhra\u010fte pro skute\u010dn\u00e9 aplikace v obytn\u00fdch budov\u00e1ch.<\/p>\n<h3>Chyba 7: Zapomenut\u00ed ov\u011b\u0159it jmenovit\u00e9 hodnoty n\u00e1hradn\u00edho za\u0159\u00edzen\u00ed<\/h3>\n<p><strong>Chyba<\/strong>: Nahrazen\u00ed vadn\u00e9ho za\u0159\u00edzen\u00ed \u201cekvivalentn\u00edmi\u201d za\u0159\u00edzen\u00edmi, kter\u00e1 odpov\u00eddaj\u00ed jmenovit\u00fdm hodnot\u00e1m proudu, ale maj\u00ed ni\u017e\u0161\u00ed jmenovit\u00e9 hodnoty nap\u011bt\u00ed.<\/p>\n<p><strong>Pro\u010d je to \u0161patn\u011b<\/strong>: P\u016fvodn\u00ed za\u0159\u00edzen\u00ed bylo specifikov\u00e1no s kompletn\u00edmi jmenovit\u00fdmi hodnotami nap\u011bt\u00ed (Ue, Ui, Uimp) z n\u011bjak\u00e9ho d\u016fvodu. N\u00e1hradn\u00ed za\u0159\u00edzen\u00ed s nedostate\u010dn\u00fdm Ui nebo Uimp mohou fyzicky pasovat a zpo\u010d\u00e1tku fungovat, ale p\u0159ed\u010dasn\u011b sel\u017eou p\u0159i elektrick\u00e9m nam\u00e1h\u00e1n\u00ed.<\/p>\n<p><strong>Spr\u00e1vn\u00fd p\u0159\u00edstup<\/strong>: Dokumentujte specifikace p\u016fvodn\u00edho za\u0159\u00edzen\u00ed v\u010detn\u011b v\u0161ech jmenovit\u00fdch hodnot nap\u011bt\u00ed. Ov\u011b\u0159te, zda n\u00e1hrady odpov\u00eddaj\u00ed nebo p\u0159ekra\u010duj\u00ed v\u0161echny t\u0159i jmenovit\u00e9 hodnoty (Ue, Ui, Uimp), nejen proudovou zat\u00ed\u017eitelnost a fyzick\u00e9 rozm\u011bry.<\/p>\n<h2>Z\u00e1v\u011br<\/h2>\n<p>Ue, Ui a Uimp nejsou t\u0159i zp\u016fsoby, jak \u0159\u00edci tot\u00e9\u017e. Jsou to t\u0159i odli\u0161n\u00e1 m\u011b\u0159en\u00ed, kter\u00e1 se zab\u00fdvaj\u00ed r\u016fzn\u00fdmi elektrick\u00fdmi nam\u00e1h\u00e1n\u00edmi: provozn\u00ed schopnost (Ue), pevnost izolace (Ui) a odolnost proti p\u0159echodov\u00e9mu p\u0159ep\u011bt\u00ed (Uimp). V\u00fdb\u011br za\u0159\u00edzen\u00ed vy\u017eaduje vyhodnocen\u00ed v\u0161ech t\u0159\u00ed proti nap\u011bt\u00ed va\u0161eho syst\u00e9mu, kategorii instalace a podm\u00ednk\u00e1m prost\u0159ed\u00ed.<\/p>\n<p>\u00davodn\u00ed ot\u00e1zka \u2013 kter\u00fd jisti\u010d MCCB se hod\u00ed do syst\u00e9mu 400 V, kdy\u017e jeden vykazuje \u201cUe 400 V, Ui 690 V, Uimp 8 kV\u201d a druh\u00fd \u201cUe 690 V, Ui 800 V, Uimp 6 kV\u201d \u2013 m\u00e1 nyn\u00ed jasnou odpov\u011b\u010f. Prvn\u00ed jisti\u010d MCCB odpov\u00edd\u00e1 va\u0161emu provozn\u00edmu nap\u011bt\u00ed (Ue 400 V) se spr\u00e1vnou izola\u010dn\u00ed rezervou (Ui 690 V) a pr\u016fmyslovou odolnost\u00ed proti p\u0159ep\u011bt\u00ed (Uimp 8 kV) vhodnou pro instalace kategorie III. Druh\u00fd je p\u0159edimenzovan\u00fd pro provozn\u00ed nap\u011bt\u00ed (Ue 690 V p\u0159ekra\u010duje va\u0161i pot\u0159ebu 400 V) a poddimenzovan\u00fd pro ochranu proti p\u0159ep\u011bt\u00ed (Uimp 6 kV je hrani\u010dn\u00ed pro pr\u016fmyslovou kategorii III). Prvn\u00ed za\u0159\u00edzen\u00ed je spr\u00e1vn\u00e1 volba.<\/p>\n<p>Spr\u00e1vn\u00e1 specifikace znamen\u00e1 systematick\u00e9 vyhodnocen\u00ed: identifikujte nap\u011bt\u00ed syst\u00e9mu pro ur\u010den\u00ed minim\u00e1ln\u00edho Ue, klasifikujte kategorii instalace pro definov\u00e1n\u00ed po\u017eadovan\u00e9ho Uimp, posu\u010fte stupe\u0148 zne\u010di\u0161t\u011bn\u00ed pro ov\u011b\u0159en\u00ed Ui a dostate\u010dnosti povrchov\u00e9 cesty a zkontrolujte jmenovit\u00e9 hodnoty proudu p\u0159i va\u0161em provozn\u00edm nap\u011bt\u00ed. Pokud jsou jmenovit\u00e9 hodnoty hrani\u010dn\u00ed, specifikujte dal\u0161\u00ed vy\u0161\u0161\u00ed standardn\u00ed hodnotu \u2013 p\u0159edimenzov\u00e1n\u00ed jmenovit\u00fdch hodnot nap\u011bt\u00ed stoj\u00ed mnohem m\u00e9n\u011b ne\u017e p\u0159ed\u010dasn\u00e9 poruchy a nouzov\u00e9 v\u00fdm\u011bny.<\/p>\n<p>A co je nejd\u016fle\u017eit\u011bj\u0161\u00ed, dokumentujte sv\u00e9 v\u00fdb\u011bry. Datov\u00e9 listy za\u0159\u00edzen\u00ed zobrazuj\u00edc\u00ed Ue, Ui a Uimp p\u0159edstavuj\u00ed testovan\u00fd, certifikovan\u00fd v\u00fdkon. Tato t\u0159i \u010d\u00edsla v\u00e1m \u0159eknou, zda za\u0159\u00edzen\u00ed zvl\u00e1dne kompletn\u00ed profil elektrick\u00e9ho nam\u00e1h\u00e1n\u00ed va\u0161\u00ed aplikace \u2013 nejen dne\u0161n\u00ed ust\u00e1len\u00fd provoz, ale roky kol\u00eds\u00e1n\u00ed nap\u011bt\u00ed, zne\u010di\u0161t\u011bn\u00ed prost\u0159ed\u00ed a p\u0159echodov\u00fdch p\u0159ep\u011bt\u00ed. \u010ct\u011bte je spr\u00e1vn\u011b, specifikujte je pe\u010dliv\u011b a va\u0161e elektrick\u00e9 syst\u00e9my budou poskytovat spolehliv\u00fd v\u00fdkon, kter\u00fd tyto normy slibuj\u00ed.<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>You&#8217;re comparing two MCCBs with identical current ratings\u2014both are 100A, three-pole devices. But the voltage specifications read differently: one shows &#8220;Ue 400V, Ui 690V, Uimp 8kV&#8221; while the other lists &#8220;Ue 690V, Ui 800V, Uimp 6kV.&#8221; Which one fits your 400V three-phase system? Can you safely use the first breaker even though its Ue matches [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":20610,"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-20608","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\/20608","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=20608"}],"version-history":[{"count":6,"href":"https:\/\/test.viox.com\/cs\/wp-json\/wp\/v2\/posts\/20608\/revisions"}],"predecessor-version":[{"id":20781,"href":"https:\/\/test.viox.com\/cs\/wp-json\/wp\/v2\/posts\/20608\/revisions\/20781"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/test.viox.com\/cs\/wp-json\/wp\/v2\/media\/20610"}],"wp:attachment":[{"href":"https:\/\/test.viox.com\/cs\/wp-json\/wp\/v2\/media?parent=20608"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/test.viox.com\/cs\/wp-json\/wp\/v2\/categories?post=20608"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/test.viox.com\/cs\/wp-json\/wp\/v2\/tags?post=20608"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}