Jisti\u010d chr\u00e1n\u00ed proti zkratu a nadproudu. Ve sv\u00e9 podstat\u011b se jedn\u00e1 o jednoduch\u00e9 elektrick\u00e9 za\u0159\u00edzen\u00ed, kter\u00e9 je velice d\u016fle\u017eit\u00e9 pro bezpe\u010dnost. \u010castou ot\u00e1zkou je, jak\u00fd m\u00e1 b\u00fdt jmenovit\u00fd proud jisti\u010de, aby dok\u00e1zal chr\u00e1nit za\u0159\u00edzen\u00ed p\u0159i abnorm\u00e1ln\u00edm stavu. Stejn\u011b tak je nezbytn\u00e9 zv\u00e1\u017eit i n\u011bkolik dal\u0161\u00edch parametr\u016f, na kter\u00e9 se zam\u011b\u0159\u00edme v n\u00e1sleduj\u00edc\u00edch \u0159\u00e1dc\u00edch.<\/p>\n\n\n\n
Prvn\u00ed v\u011bc, kterou je pot\u0159eba zv\u00e1\u017eit p\u0159i v\u00fdb\u011bru jisti\u010de, je typick\u00fd vyp\u00ednac\u00ed proud, p\u0159i\u010dem\u017e slovo typick\u00fd odkazuje na jmenovit\u00e9 podm\u00ednky (okoln\u00ed teplota okolo 20 a\u017e 25 stup\u0148\u016f Celsia, obvykl\u00e1 \u00farove\u0148 nap\u011bt\u00ed v obvodu a podobn\u011b). Okoln\u00ed teplota se v m\u00edst\u011b instalace jisti\u010de m\u016f\u017ee li\u0161it. P\u0159\u00edli\u0161 vysok\u00e9 teploty, nebo naopak n\u00edzk\u00e9, ovlivn\u00ed elektrick\u00e9 vlastnosti jisti\u010de.<\/p>\n\n\n\n
S\u00ed\u0165ov\u00e9 nap\u011bt\u00ed tak\u00e9 nen\u00ed ide\u00e1ln\u00ed, proto\u017ee u t\u0159\u00edf\u00e1zov\u00e9ho veden\u00ed m\u016f\u017ee dosahovat +10 % a\u017e -10 %. B\u011b\u017en\u00ed u\u017eivatel\u00e9 t\u011bmto vysv\u011btlivk\u00e1m moc nerozum\u00ed, a proto je dobr\u00e9 dr\u017eet se klasick\u00fdch podm\u00ednek a jen si p\u0159idat ur\u010ditou rezervu.<\/p>\n\n\n\n
O elektroinstala\u010dn\u00ed materi\u00e1l<\/a> byste se m\u011bli zaj\u00edmat, proto\u017ee na n\u011bm z\u00e1vis\u00ed spousta dal\u0161\u00edch prvk\u016f.<\/p>\n\n\n\n Jisti\u010d je za\u0159\u00edzen\u00ed pro ochranu p\u0159ed abnormalitami souvisej\u00edc\u00edmi s proudem. Pro\u010d se tedy p\u0159i v\u00fdb\u011bru jisti\u010de zaj\u00edmat o jmenovit\u00e9 nap\u011bt\u00ed? Podobn\u011b jako proudov\u00e9 chr\u00e1ni\u010de<\/a>, tak i jisti\u010de maj\u00ed parametry, je\u017e jsou p\u0159i v\u00fdb\u011bru d\u016fle\u017eit\u00e9.<\/p>\n\n\n\n U jisti\u010d\u016f souvis\u00ed jmenovit\u00e9 nap\u011bt\u00ed s bezpe\u010dnost\u00ed, nebo\u0165 zaru\u010duje, \u017ee jisti\u010d m\u016f\u017ee bezpe\u010dn\u011b vypnout p\u0159i jak\u00e9mkoliv poruchov\u00e9m stavu. Takt\u00e9\u017e mus\u00ed b\u00fdt minim\u00e1ln\u011b stejn\u00e9 nebo vy\u0161\u0161\u00ed ne\u017e nap\u011bt\u00ed otev\u0159en\u00e9ho obvodu. Pokud je jmenovit\u00e9 nap\u011bt\u00ed n\u00edzk\u00e9, m\u016f\u017ee p\u0159i rozepnut\u00ed kontakt\u016f (zejm\u00e9na p\u0159i zkratu) doj\u00edt k obloukov\u00e9mu v\u00fdboji \u010di v\u00fdbuchu.<\/p>\n\n\n\n V p\u0159\u00edpad\u011b, \u017ee si chcete zakoupit rozvad\u011b\u010de a rozvodnice<\/a>, jisti\u010de, nebo sh\u00e1n\u00edte CYKY kabely<\/a>, sta\u010d\u00ed se pod\u00edvat do e-shopu KVelektro.cz. <\/p>\n","protected":false},"excerpt":{"rendered":" Jisti\u010d chr\u00e1n\u00ed proti zkratu a nadproudu. Ve sv\u00e9 podstat\u011b se jedn\u00e1 o jednoduch\u00e9 elektrick\u00e9 za\u0159\u00edzen\u00ed,…<\/p>\n","protected":false},"author":4,"featured_media":2660,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_sitemap_exclude":false,"_sitemap_priority":"","_sitemap_frequency":"","footnotes":""},"categories":[7],"tags":[350,349,348],"class_list":["post-2659","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-bydleni","tag-elektrina","tag-elektroinstalace","tag-jistic"],"amp_enabled":false,"_links":{"self":[{"href":"https:\/\/stalo-se.cz\/index.php?rest_route=\/wp\/v2\/posts\/2659","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/stalo-se.cz\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/stalo-se.cz\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/stalo-se.cz\/index.php?rest_route=\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/stalo-se.cz\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2659"}],"version-history":[{"count":1,"href":"https:\/\/stalo-se.cz\/index.php?rest_route=\/wp\/v2\/posts\/2659\/revisions"}],"predecessor-version":[{"id":2661,"href":"https:\/\/stalo-se.cz\/index.php?rest_route=\/wp\/v2\/posts\/2659\/revisions\/2661"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/stalo-se.cz\/index.php?rest_route=\/wp\/v2\/media\/2660"}],"wp:attachment":[{"href":"https:\/\/stalo-se.cz\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2659"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/stalo-se.cz\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2659"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/stalo-se.cz\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2659"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}Jmenovit\u00e9 nap\u011bt\u00ed<\/h2>\n\n\n\n