{"id":2401,"date":"2019-05-30T19:02:25","date_gmt":"2019-05-30T17:02:25","guid":{"rendered":"http:\/\/jvelektronika.cz\/?page_id=2401"},"modified":"2019-05-30T19:02:25","modified_gmt":"2019-05-30T17:02:25","slug":"ochrany-pred-prepetim-od-noark-pro-fotovoltaicke-systemy","status":"publish","type":"page","link":"https:\/\/jvelektronika.cz\/?page_id=2401","title":{"rendered":"Ochrany p\u0159ed p\u0159ep\u011bt\u00edm od NOARK pro fotovoltaick\u00e9 syst\u00e9my"},"content":{"rendered":"<h1>Ochrany p\u0159ed p\u0159ep\u011bt\u00edm od NOARK pro fotovoltaick\u00e9 syst\u00e9my<\/h1>\n<p>&nbsp;<\/p>\n<p><strong>\u00dader blesku a elektromagnetick\u00e9 impulzy vznikaj\u00edc\u00ed p\u0159i sp\u00ednac\u00edch d\u011bj\u00edch, znamenaj\u00ed v\u00e1\u017en\u00e9 ohro\u017een\u00ed bezpe\u010dnosti elektrick\u00fdch instalac\u00ed. I p\u0159es kr\u00e1tkou dobu trv\u00e1n\u00ed, takov\u00e9 p\u0159ep\u011bt\u00ed vyvol\u00e1v\u00e1 r\u00e1zov\u00fd proud, kter\u00fd m\u016f\u017ee zp\u016fsobit \u00fapln\u00e9 selh\u00e1n\u00ed, nebo dokonce zni\u010den\u00ed posti\u017een\u00e9 instalace.<\/strong><\/p>\n<p>&nbsp;<\/p>\n<p>Za\u0159\u00edzen\u00ed na ochranu p\u0159ed p\u0159ep\u011bt\u00edm (SPD \u2013 <em>Surge Protective Devices<\/em>) pln\u00ed p\u0159edev\u0161\u00edm dva \u00fakoly:<br \/>\n1) Omezen\u00ed n\u00e1r\u016fstu amplitudy nap\u011bt\u00ed tak, aby nebyla p\u0159ekro\u010dena dielektrick\u00e1 pevnost za\u0159\u00edzen\u00ed.<br \/>\n2)\u00a0 Sveden\u00ed r\u00e1zov\u00fdch proud\u016f vyvolan\u00fdch p\u0159ep\u011bt\u00edm.<\/p>\n<p><em><strong>OBR. 01 : Svodi\u010de p\u0159ep\u011bt\u00ed Ex9UEP 35P 1500<\/strong><\/em><\/p>\n<p>&nbsp;<\/p>\n<p><a href=\"http:\/\/jvelektronika.cz\/wp-content\/uploads\/2019\/05\/p\u0159ep1.jpg\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-full wp-image-2402\" src=\"http:\/\/jvelektronika.cz\/wp-content\/uploads\/2019\/05\/p\u0159ep1.jpg\" alt=\"\" width=\"350\" height=\"351\" srcset=\"https:\/\/jvelektronika.cz\/wp-content\/uploads\/2019\/05\/p\u0159ep1.jpg 350w, https:\/\/jvelektronika.cz\/wp-content\/uploads\/2019\/05\/p\u0159ep1-150x150.jpg 150w, https:\/\/jvelektronika.cz\/wp-content\/uploads\/2019\/05\/p\u0159ep1-300x300.jpg 300w, https:\/\/jvelektronika.cz\/wp-content\/uploads\/2019\/05\/p\u0159ep1-90x90.jpg 90w\" sizes=\"(max-width: 350px) 100vw, 350px\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<p>Za\u0159\u00edzen\u00ed na ochranu p\u0159ed p\u0159ep\u011bt\u00edm jsou klasifikov\u00e1na do t\u0159\u00ed t\u0159\u00edd v souladu s normou \u010cSN EN 61643-11 ed. 2.<\/p>\n<p><strong>SPD t\u0159\u00eddy I<\/strong> chr\u00e1n\u00ed elektrick\u00e9 instalace p\u0159ed p\u0159\u00edm\u00fdm \u00faderem blesku a doporu\u010duje se ve specifick\u00fdch p\u0159\u00edpadech budov pro provozov\u00e1n\u00ed slu\u017eeb a pro pr\u016fmysl chr\u00e1n\u011bn\u00fd syst\u00e9mem ochrany p\u0159ed bleskem nebo s\u00ed\u0165ovanou klec\u00ed. M\u016f\u017ee sv\u00e9st \u010d\u00e1ste\u010dn\u00fd bleskov\u00fd proud s typick\u00fdm pr\u016fb\u011bhem r\u00e1zov\u00e9 vlny 10\/350 \u00b5s.<\/p>\n<p><strong>SPD t\u0159\u00eddy II<\/strong> je hlavn\u00ed ochrann\u00fd syst\u00e9m pro v\u0161echny elektrick\u00e9 instalace n\u00edzk\u00e9ho nap\u011bt\u00ed. Je-li instalov\u00e1n v ka\u017ed\u00e9m elektrick\u00e9m rozv\u00e1d\u011b\u010di, zabra\u0148uje \u0161\u00ed\u0159en\u00ed p\u0159ep\u011bt\u00ed v elektrick\u00fdch instalac\u00edch a chr\u00e1n\u00ed p\u0159ipojen\u00e1 za\u0159\u00edzen\u00ed. SPD t\u0159\u00eddy II sv\u00e1d\u011bj\u00ed r\u00e1zovou vlnu proudu s charakteristick\u00fdm pr\u016fb\u011bhem 8\/20 \u00b5s.<\/p>\n<p><strong>SPD t\u0159\u00eddy III<\/strong> maj\u00ed men\u0161\u00ed schopnost sv\u00e1d\u011bt proud vyvolan\u00fd p\u0159ep\u011bt\u00edm. Proto se instaluj\u00ed jako dopln\u011bk k SPD t\u0159\u00eddy II a v bl\u00edzkosti citliv\u00fdch z\u00e1t\u011b\u017e\u00ed. T\u0159\u00edda III SPD je charakterizov\u00e1na kombinac\u00ed r\u00e1zov\u00fdch vln nap\u011bt\u00ed 1,2\/50 \u00b5s a proudu 8\/20 \u00b5s.<\/p>\n<p>&nbsp;<\/p>\n<p>NOARK, jeden z p\u0159edn\u00edch sv\u011btov\u00fdch dodavatel\u016f n\u00edzkonap\u011b\u0165ov\u00fdch za\u0159\u00edzen\u00ed a \u0161pi\u010dkov\u00e9\u00a0sol\u00e1rn\u00ed techniky, m\u00e1 ve sv\u00e9m sortimentu p\u0159ep\u011b\u0165ov\u00e9 ochrany v\u0161ech t\u0159\u00edd (v\u010detn\u011b kombinace ochran t\u0159\u00edd I + II) v produktov\u00e9 \u0159ad\u011b Ex9UE 1-3. Novinkou v sortimentu firmy NOARK pro rok 2019 je kompletn\u00ed \u0159ada p\u0159ep\u011b\u0165ov\u00fdch ochran t\u0159\u00eddy II DC Ex9UEP, zalo\u017een\u00e1 na vyu\u017eit\u00ed varistor\u016f a vhodn\u00e1 pro uzemn\u011bn\u00e9 i neuzemn\u011bn\u00e9 fotovoltaick\u00e9 aplikace. Za\u0159\u00edzen\u00ed t\u00e9to inovativn\u00ed produktov\u00e9 \u0159ady se vyzna\u010duj\u00ed maxim\u00e1ln\u00edm trval\u00fdm provozn\u00edm nap\u011bt\u00edm v rozsahu od 600 do 1 500 V DC.<\/p>\n<p>Nask\u00fdt\u00e1 se ot\u00e1zka, pro\u010d a\u017e 1 500 V DC. V posledn\u00edch n\u011bkolika letech byl toti\u017e pro v\u00fdstavbu fotovoltaick\u00fdch elektr\u00e1ren p\u0159ijat standard struktury zapojen\u00ed s nap\u011bt\u00edm 1 500 V DC. P\u0159echod k vy\u0161\u0161\u00edm nap\u011bt\u00edm \u0159et\u011bzc\u016f (string\u016f), do nich\u017e jsou s\u00e9riov\u011b spojeny fotovoltaick\u00e9 panely, vede k v\u00fdznamn\u00e9mu sn\u00ed\u017een\u00ed po\u010dtu zdrojov\u00fdch obvod\u016f, slu\u010dovac\u00edch box\u016f a pot\u0159ebn\u00e9ho elektrick\u00e9ho za\u0159\u00edzen\u00ed. Krom\u011b toho nejsou \u017e\u00e1dn\u00e9 z\u00e1m\u011bry p\u0159ekro\u010dit v budoucnosti nap\u011bt\u00ed \u0159et\u011bzc\u016f 1 500 V DC, proto\u017ee to u\u017e by nebylo n\u00e1kladov\u011b efektivn\u00ed.<\/p>\n<p>Nov\u00e9 SPD spole\u010dnosti NOARK jsou modul\u00e1rn\u00ed. Z\u00e1suvn\u00fd modul je navr\u017een tak, \u017ee jej lze vym\u011bnit bez odpojen\u00ed za\u0159\u00edzen\u00ed. Indik\u00e1tor stavu z\u00e1suvn\u00e9ho modulu ukazuje, zda je SPD funk\u010dn\u00ed nebo mimo provoz, a voliteln\u00fd kontakt d\u00e1lkov\u00e9 signalizace iniciuje d\u00e1lkovou signalizaci a v\u00fdstrahu. Moduly p\u0159ep\u011b\u0165ov\u00fdch\u00a0ochran Ex9UEP SPD se snadno instaluj\u00ed a dokonale integruj\u00ed do \u0159ad na li\u0161t\u011b v rozv\u00e1d\u011b\u010d\u00edch NOARK (obr. 1).<\/p>\n<p>&nbsp;<\/p>\n<p><em><strong>OBR. 02: Polarizovan\u00fd jisti\u010d 2P Ex9BP-JX<\/strong><\/em><\/p>\n<p>&nbsp;<\/p>\n<p><a href=\"http:\/\/jvelektronika.cz\/wp-content\/uploads\/2019\/05\/p\u0159ep02.png\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-full wp-image-2403\" src=\"http:\/\/jvelektronika.cz\/wp-content\/uploads\/2019\/05\/p\u0159ep02.png\" alt=\"\" width=\"350\" height=\"412\" srcset=\"https:\/\/jvelektronika.cz\/wp-content\/uploads\/2019\/05\/p\u0159ep02.png 350w, https:\/\/jvelektronika.cz\/wp-content\/uploads\/2019\/05\/p\u0159ep02-255x300.png 255w\" sizes=\"(max-width: 350px) 100vw, 350px\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<p>Nov\u00e1 \u0159ada ochran NOARK je dopln\u011bna novou generac\u00ed jisti\u010d\u016f stejnosm\u011brn\u00e9ho proudu. Je to jednak nepolarizovan\u00fd miniaturn\u00ed jisti\u010d Ex9BP, nahrazuj\u00edc\u00ed star\u00fd typ Ex9BP- -H\/N, d\u00e1le polarizovan\u00fd jisti\u010d Ex9BP-JX (obr. 2), kter\u00fd nahrazuje Ex9BD, a zejm\u00e9na nov\u00fd kompaktn\u00ed jisti\u010d Ex9MV2S-PV (obr. 3) se zkratovou odolnost\u00ed 15 kA, ur\u010den\u00fd hlavn\u011b pro fotovoltaick\u00e9 aplikace se jmenovit\u00fdm nap\u011bt\u00edm a\u017e 1 500 V DC.<\/p>\n<p>&nbsp;<\/p>\n<p><em><strong>OBR. 03: Kompaktn\u00ed jisti\u010d Ex9MV2S-PV<\/strong><\/em><\/p>\n<p>&nbsp;<\/p>\n<p><a href=\"http:\/\/jvelektronika.cz\/wp-content\/uploads\/2019\/05\/p\u0159ep03.jpg\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-full wp-image-2404\" src=\"http:\/\/jvelektronika.cz\/wp-content\/uploads\/2019\/05\/p\u0159ep03.jpg\" alt=\"\" width=\"352\" height=\"352\" srcset=\"https:\/\/jvelektronika.cz\/wp-content\/uploads\/2019\/05\/p\u0159ep03.jpg 352w, https:\/\/jvelektronika.cz\/wp-content\/uploads\/2019\/05\/p\u0159ep03-150x150.jpg 150w, https:\/\/jvelektronika.cz\/wp-content\/uploads\/2019\/05\/p\u0159ep03-300x300.jpg 300w, https:\/\/jvelektronika.cz\/wp-content\/uploads\/2019\/05\/p\u0159ep03-90x90.jpg 90w\" sizes=\"(max-width: 352px) 100vw, 352px\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<p>NOARK se intenzivn\u011b zab\u00fdv\u00e1 v\u00fdvojem inova\u010dn\u00ed fotovoltaick\u00e9 techniky. Spole\u010dnost je v sou\u010dasn\u00e9 dob\u011b schopna nab\u00eddnout kompletn\u00ed mont\u00e1\u017en\u00ed prvky pro v\u0161echny druhy fotovoltaick\u00fdch syst\u00e9m\u016f a jej\u00ed sortiment pro fotovoltaiku se neust\u00e1le roz\u0161i\u0159uje.<\/p>\n<p>&nbsp;<\/p>\n<p>ZDROJ INFORMAC\u00cd: http:\/\/www.noark-electric.cz<\/p>\n<p>Publikov\u00e1no 30. 05. 2019<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ochrany p\u0159ed p\u0159ep\u011bt\u00edm od NOARK pro fotovoltaick\u00e9 syst\u00e9my &nbsp; \u00dader blesku a elektromagnetick\u00e9 impulzy vznikaj\u00edc\u00ed p\u0159i sp\u00ednac\u00edch d\u011bj\u00edch, znamenaj\u00ed v\u00e1\u017en\u00e9 ohro\u017een\u00ed bezpe\u010dnosti elektrick\u00fdch instalac\u00ed. I p\u0159es kr\u00e1tkou dobu trv\u00e1n\u00ed, takov\u00e9 p\u0159ep\u011bt\u00ed vyvol\u00e1v\u00e1 r\u00e1zov\u00fd proud, kter\u00fd m\u016f\u017ee zp\u016fsobit \u00fapln\u00e9 selh\u00e1n\u00ed, nebo dokonce zni\u010den\u00ed posti\u017een\u00e9 instalace. &nbsp; Za\u0159\u00edzen\u00ed na ochranu p\u0159ed p\u0159ep\u011bt\u00edm [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":2172,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"_links":{"self":[{"href":"https:\/\/jvelektronika.cz\/index.php?rest_route=\/wp\/v2\/pages\/2401"}],"collection":[{"href":"https:\/\/jvelektronika.cz\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/jvelektronika.cz\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/jvelektronika.cz\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/jvelektronika.cz\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2401"}],"version-history":[{"count":1,"href":"https:\/\/jvelektronika.cz\/index.php?rest_route=\/wp\/v2\/pages\/2401\/revisions"}],"predecessor-version":[{"id":2405,"href":"https:\/\/jvelektronika.cz\/index.php?rest_route=\/wp\/v2\/pages\/2401\/revisions\/2405"}],"up":[{"embeddable":true,"href":"https:\/\/jvelektronika.cz\/index.php?rest_route=\/wp\/v2\/pages\/2172"}],"wp:attachment":[{"href":"https:\/\/jvelektronika.cz\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2401"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}