{"id":2112,"date":"2025-06-17T16:28:06","date_gmt":"2025-06-17T08:28:06","guid":{"rendered":"https:\/\/www.britecelectric.com\/?post_type=blog&#038;p=2112"},"modified":"2025-08-19T16:03:23","modified_gmt":"2025-08-19T08:03:23","slug":"ac-vs-dc-surge-protection-whats-the-difference","status":"publish","type":"blog","link":"https:\/\/www.britecelectric.com\/hu\/blog\/ac-vs-dc-surge-protection-whats-the-difference\/","title":{"rendered":"AC vs. DC Surge Protection: What&#8217;s the Difference?"},"content":{"rendered":"A t\u00falfesz\u00fclts\u00e9gv\u00e9delem alapvet\u0151 fontoss\u00e1g\u00fa a modern elektromos rendszerek biztons\u00e1ga \u00e9s \u00fczemideje szempontj\u00e1b\u00f3l. A megfelel\u0151 v\u00e1laszt\u00e1s <a href=\"https:\/\/www.britecelectric.com\/hu\/products\/\" target=\"_blank\" rel=\"noopener\"><strong data-start=\"1300\" data-end=\"1333\">T\u00falfesz\u00fclts\u00e9g-v\u00e9delmi eszk\u00f6z (SPD)<\/strong><\/a> azzal kezd\u0151dik, hogy meg\u00e9rtj\u00fck, hogyan viselkednek elt\u00e9r\u0151en a v\u00e1ltakoz\u00f3 \u00e1ram\u00fa \u00e9s egyen\u00e1ram\u00fa rendszerek tranziensek alatt \u2013 k\u00fcl\u00f6n\u00f6sen az \u00edvkiolt\u00e1s (v\u00e1lt\u00f3\u00e1ram\u00fa nulla-keresztez\u00e9s vagy egyen\u00e1ram nulla-\u00e1tl\u00e9p\u00e9s n\u00e9lk\u00fcl) \u00e9s a komponensek tervez\u00e9se (k\u00e9tir\u00e1ny\u00fa \u00e9s egyir\u00e1ny\u00fa MOV-ok) eset\u00e9n. Ez az \u00fatmutat\u00f3 elmagyar\u00e1zza a k\u00fcl\u00f6nbs\u00e9get az AC SPD \u00e9s a DC SPD k\u00f6z\u00f6tt, lek\u00e9pezi az alkalmazand\u00f3 IEC\/UL szabv\u00e1nyokat, \u00e9s bemutatja, hogyan v\u00e1lasszon olyan SPD-t, amely megfelel az alkalmaz\u00e1si \u00e9s megfelel\u0151s\u00e9gi ig\u00e9nyeinek.\r\n<h2>1. Bevezet\u00e9s<\/h2>\r\nTransient overvoltages, also known as power surges, are short-duration spikes in voltage that can damage or destroy sensitive electronic equipment. These surges can be caused by lightning strikes, grid switching operations, large load switching, or inductive equipment startups. SPD devices, also called surge suppressors or surge arresters, are engineered to detect and divert these spikes before they reach protected equipment.\r\n\r\nBut not all surges\u2014or SPDs\u2014are created equal. AC (Alternating Current) and DC (Direct Current) systems exhibit very different electrical behaviors and, as such, require distinct surge protection approaches. Per <a href=\"https:\/\/webstore.iec.ch\/en\/publication\/26931\" target=\"_blank\" rel=\"noopener\"><strong><em>IEC 61643-11\/-31<\/em><\/strong><\/a>, az SPD korl\u00e1tozza a t\u00falfesz\u00fclts\u00e9get, \u00e9s nanoszekundumokon bel\u00fcl elt\u00e9r\u00edti a t\u00falfesz\u00fclts\u00e9get, v\u00e9dve a k\u00e9s\u0151bbi berendez\u00e9seket.\r\n<h2>2. Mi az AC t\u00falfesz\u00fclts\u00e9gv\u00e9delem?<\/h2>\r\n<a href=\"https:\/\/www.britecelectric.com\/hu\/product-category\/ac-power-surge-protection\/\" rel=\"attachment wp-att-2114\"><img class=\"alignnone wp-image-2114\" src=\"https:\/\/www.britecelectric.com\/wp-content\/uploads\/2025\/06\/AC-Power-Surge-Protection-1024x1024.webp\" alt=\"\" width=\"600\" height=\"600\" \/><\/a>\r\n\r\n<a href=\"https:\/\/www.britecelectric.com\/hu\/product-category\/ac-power-surge-protection\/\" target=\"_blank\" rel=\"noopener\"><em><strong data-start=\"218\" data-end=\"241\">AC t\u00falfesz\u00fclts\u00e9g elleni v\u00e9delem<\/strong><\/em><\/a> Olyan elektromos rendszerekhez k\u00e9sz\u00fclt, ahol a fesz\u00fclts\u00e9g id\u0151szakosan v\u00e1ltakozik \u2013 jellemz\u0151en 50 Hz vagy 60 Hz. Ezeket a rendszereket sz\u00e9les k\u00f6rben haszn\u00e1lj\u00e1k lak\u00f3h\u00e1zakban, kereskedelmi \u00e9p\u00fcletekben, gy\u00e1rakban \u00e9s ipari automatiz\u00e1l\u00e1si h\u00e1l\u00f3zatokban. Szerint <a href=\"https:\/\/webstore.iec.ch\/en\/publication\/65314\" target=\"_blank\" rel=\"noopener\"><strong data-start=\"490\" data-end=\"506\">IEC 61643-11<\/strong><\/a>, az AC SPD-ket 1., 2. \u00e9s 3. t\u00edpusba sorolj\u00e1k, mindegyiket az eloszt\u00f3rendszeren bel\u00fcli m\u00e1s-m\u00e1s telep\u00edt\u00e9si ponthoz sz\u00e1nj\u00e1k.\r\n<h3 data-start=\"652\" data-end=\"688\">Az AC SPD-k f\u0151bb jellemz\u0151i<\/h3>\r\n<ul data-start=\"689\" data-end=\"1410\">\r\n \t<li data-start=\"689\" data-end=\"777\">\r\n<p data-start=\"691\" data-end=\"777\">\u00c1ltal\u00e1nos h\u00e1l\u00f3zati fesz\u00fclts\u00e9geken, p\u00e9ld\u00e1ul 115 V, 230 V, 400 V \u00e9s 690 V AC-ig m\u0171k\u00f6dik.<\/p>\r\n<\/li>\r\n \t<li data-start=\"778\" data-end=\"857\">\r\n<p data-start=\"780\" data-end=\"857\">K\u00e9tir\u00e1ny\u00fa m\u0171k\u00f6d\u00e9s az AC szinuszhull\u00e1mok polarit\u00e1sv\u00e1lt\u00e1s\u00e1nak kezel\u00e9s\u00e9re.<\/p>\r\n<\/li>\r\n \t<li data-start=\"858\" data-end=\"983\">\r\n<p data-start=\"860\" data-end=\"983\">\u00cdvkiolt\u00e1s a v\u00e1ltakoz\u00f3 \u00e1ram\u00fa hull\u00e1mforma term\u00e9szetes z\u00e9r\u00f3 keresztez\u0151d\u00e9sei r\u00e9v\u00e9n, ami biztons\u00e1gosabb\u00e1 \u00e9s hat\u00e9konyabb\u00e1 teszi a lev\u00e1laszt\u00e1st.<\/p>\r\n<\/li>\r\n \t<li data-start=\"984\" data-end=\"1220\">\r\n<p data-start=\"986\" data-end=\"1220\">\u00c1ltal\u00e1nosan haszn\u00e1lt MOV-ok (f\u00e9moxid-varisztorok) a t\u00falfesz\u00fclts\u00e9g elnyel\u00e9s\u00e9re; Az 1-es t\u00edpus\u00fa SPD-kben a MOV-okat gyakran GDT-kkel (Gas Discharge Tubes) vagy \u00edvkamr\u00e1kkal kombin\u00e1lj\u00e1k, hogy ellen\u00e1lljanak a nagyenergi\u00e1j\u00fa vill\u00e1mimpulzusoknak (10\/350 \u00b5s hull\u00e1mform\u00e1k).<\/p>\r\n<\/li>\r\n \t<li data-start=\"1221\" data-end=\"1410\">\r\n<p data-start=\"1223\" data-end=\"1410\">\u00d6sszehangol\u00e1s a felfel\u00e9 ir\u00e1nyul\u00f3 v\u00e9delemmel (MCB vagy biztos\u00edt\u00e9k) sz\u00fcks\u00e9ges; A legjobb gyakorlat az, hogy az SPD vezet\u00e9k hossz\u00e1t a lehet\u0151 legr\u00f6videbbre kell tartani, ide\u00e1lis esetben &lt;0,5 m-re, a marad\u00e9kfesz\u00fclts\u00e9g minimaliz\u00e1l\u00e1sa \u00e9rdek\u00e9ben.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<blockquote>\r\n<h3 data-start=\"1412\" data-end=\"1447\">SPD t\u00edpusok v\u00e1ltakoz\u00f3 \u00e1ram\u00fa alkalmaz\u00e1sokhoz<\/h3>\r\n<ul data-start=\"1448\" data-end=\"1800\">\r\n \t<li data-start=\"1448\" data-end=\"1558\">\r\n<p data-start=\"1450\" data-end=\"1558\"><strong data-start=\"1450\" data-end=\"1464\">1. t\u00edpus\u00fa SPD<\/strong> \u2013 Szervizbej\u00e1rathoz szerelve; ellen\u00e1ll a k\u00f6zvetlen vill\u00e1m\u00e1ramoknak (Iimp 10\/350 \u00b5s).<\/p>\r\n<\/li>\r\n \t<li data-start=\"1559\" data-end=\"1689\">\r\n<p data-start=\"1561\" data-end=\"1689\"><strong data-start=\"1561\" data-end=\"1575\">2. t\u00edpus\u00fa SPD<\/strong> \u2013 Eloszt\u00f3t\u00e1bl\u00e1kra szerelve; v\u00e9d a kapcsol\u00e1si t\u00falfesz\u00fclts\u00e9gt\u0151l \u00e9s a k\u00f6zvetett vill\u00e1mt\u00f3l (In\/Imax 8\/20 \u00b5s).<\/p>\r\n<\/li>\r\n \t<li data-start=\"1690\" data-end=\"1800\">\r\n<p data-start=\"1692\" data-end=\"1800\"><strong data-start=\"1692\" data-end=\"1706\">3. t\u00edpus\u00fa SPD<\/strong> \u2013 \u00c9rz\u00e9keny berendez\u00e9sek k\u00f6zel\u00e9ben telep\u00edtve; finom v\u00e9delmet ny\u00fajt a marad\u00e9k t\u00falfesz\u00fclts\u00e9g ellen.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<h3 data-start=\"1802\" data-end=\"1828\">Tipikus alkalmaz\u00e1sok<\/h3>\r\n<ul data-start=\"1829\" data-end=\"2053\">\r\n \t<li data-start=\"1829\" data-end=\"1870\">\r\n<p data-start=\"1831\" data-end=\"1870\">F\u0151 szervizbej\u00e1rati panelek (1. t\u00edpus)<\/p>\r\n<\/li>\r\n \t<li data-start=\"1871\" data-end=\"1912\">\r\n<p data-start=\"1873\" data-end=\"1912\">\u00c9p\u00fcleteloszt\u00f3 t\u00e1bl\u00e1k (2. t\u00edpus)<\/p>\r\n<\/li>\r\n \t<li data-start=\"1913\" data-end=\"1967\">\r\n<p data-start=\"1915\" data-end=\"1967\">Vez\u00e9rl\u0151panelek ipari k\u00f6rnyezetben (2. t\u00edpus)<\/p>\r\n<\/li>\r\n \t<li data-start=\"1968\" data-end=\"2053\">\r\n<p data-start=\"1970\" data-end=\"2053\">Haszn\u00e1lati pont vagy aljzat szint\u0171 v\u00e9delem az \u00e9rz\u00e9keny v\u00e1ltakoz\u00f3 \u00e1ram\u00fa eszk\u00f6z\u00f6kh\u00f6z (3. t\u00edpus)<\/p>\r\n<\/li>\r\n<\/ul>\r\n<h3 data-start=\"2055\" data-end=\"2094\">P\u00e9lda innen <span style=\"text-decoration: underline;\"><a href=\"https:\/\/www.britecelectric.com\/hu\/product-category\/ac-power-surge-protection\/\" target=\"_blank\" rel=\"noopener\"><strong><em>Britec AC SPD term\u00e9k<\/em><\/strong><\/a> <\/span>Hat\u00f3t\u00e1vols\u00e1g<\/h3>\r\n<ul data-start=\"2095\" data-end=\"2701\">\r\n \t<li data-start=\"2095\" data-end=\"2257\">\r\n<p data-start=\"2097\" data-end=\"2257\"><strong data-start=\"2097\" data-end=\"2117\">BR-50GR (1. t\u00edpus)<\/strong>: N\u00e9vleges Uc 275\/320\/440 V, Iimp 25 kA-ig (10\/350 \u00b5s); ide\u00e1lis bej\u00e1rati vill\u00e1mv\u00e9delemhez TN\/TT rendszerekben.<\/p>\r\n<\/li>\r\n \t<li data-start=\"2258\" data-end=\"2392\">\r\n<p data-start=\"2260\" data-end=\"2392\"><strong data-start=\"2260\" data-end=\"2290\">BR-12.5M (1+2 t\u00edpus\u00fa hibrid)<\/strong>: Vill\u00e1mimpulzusokat \u00e9s kapcsol\u00e1si t\u00falfesz\u00fclts\u00e9geket is kezeli, \u00edgy ipari l\u00e9tes\u00edtm\u00e9nyekhez is alkalmas.<\/p>\r\n<\/li>\r\n \t<li data-start=\"2393\" data-end=\"2583\">\r\n<p data-start=\"2395\" data-end=\"2583\"><strong data-start=\"2395\" data-end=\"2425\">BR-40 \u00e9s BR-30FU (2. t\u00edpus)<\/strong>: n\u00e9vleges Uc 275 V, In 20 kA \/ Imax 40 kA (8\/20 \u00b5s); a BR-30FU biztons\u00e1gi biztos\u00edt\u00e9kot tartalmaz, ami leegyszer\u0171s\u00edti a telep\u00edt\u00e9st \u00e9s jav\u00edtja a biztons\u00e1got.<\/p>\r\n<\/li>\r\n \t<li data-start=\"2584\" data-end=\"2701\">\r\n<p data-start=\"2586\" data-end=\"2701\"><strong data-start=\"2586\" data-end=\"2613\">BR-230\/BR275-6 (3. t\u00edpus)<\/strong>: V\u00e9gberendez\u00e9sek v\u00e9delm\u00e9re, alacsony marad\u00e9kfesz\u00fclts\u00e9ggel (Fel \u2264 1,5 kV).<\/p>\r\n<\/li>\r\n<\/ul>\r\n<\/blockquote>\r\n<h2>3. Mi az a DC t\u00falfesz\u00fclts\u00e9g-v\u00e9delem?<\/h2>\r\n<a href=\"https:\/\/www.britecelectric.com\/hu\/product-category\/dc-surge-protector\/\" rel=\"attachment wp-att-2113\"><img class=\"alignnone wp-image-2113\" src=\"https:\/\/www.britecelectric.com\/wp-content\/uploads\/2025\/06\/Surge-Protection-Devices-For-Solar-PV-1024x1024.webp\" alt=\"Egyen\u00e1ram\u00fa t\u00falfesz\u00fclts\u00e9g-v\u00e9delmi eszk\u00f6z\u00f6k\" width=\"600\" height=\"600\" \/><\/a>\r\n\r\n<em><a href=\"https:\/\/www.britecelectric.com\/hu\/product-category\/dc-surge-protector\/\" target=\"_blank\" rel=\"noopener\"><strong data-start=\"361\" data-end=\"384\">DC t\u00falfesz\u00fclts\u00e9g v\u00e9delem<\/strong><\/a><\/em> Egyen\u00e1ram\u00fa rendszerekhez k\u00e9sz\u00fclt, ahol az elektromos \u00e1ram egyetlen ir\u00e1nyban \u00e1ramlik, term\u00e9szetes nulla-\u00e1tl\u00e9p\u00e9s n\u00e9lk\u00fcl. Az id\u0151szakos fesz\u00fclts\u00e9gv\u00e1lt\u00e1s el\u0151nyeit \u00e9lvez\u0151 v\u00e1ltakoz\u00f3 \u00e1ram\u00fa rendszerekkel ellent\u00e9tben az egyen\u00e1ram\u00fa rendszerek egyed\u00fcl\u00e1ll\u00f3 m\u00e9rn\u00f6ki kih\u00edv\u00e1st jelentenek: az \u00edvek nem aludnak ki magukt\u00f3l. Ez azt jelenti, hogy az egyen\u00e1ram\u00fa SPD-k robusztusabb \u00edvolt\u00e1st, termikus lev\u00e1laszt\u00e1st \u00e9s mechanikus kiold\u00f3mechanizmusokat ig\u00e9nyelnek a biztons\u00e1g biztos\u00edt\u00e1sa \u00e9s a termikus kifut\u00e1s megakad\u00e1lyoz\u00e1sa \u00e9rdek\u00e9ben.\r\n<h3 data-start=\"820\" data-end=\"849\">A DC SPD-k f\u0151bb jellemz\u0151i<\/h3>\r\n<ul data-start=\"850\" data-end=\"1855\">\r\n \t<li data-start=\"850\" data-end=\"1011\">\r\n<p data-start=\"852\" data-end=\"1011\"><strong data-start=\"852\" data-end=\"871\">N\u00e9vleges fesz\u00fclts\u00e9g<\/strong>: Jellemz\u0151en 500 V-1500 V DC fesz\u00fclts\u00e9ghez tervezt\u00e9k, lefedi a napelemes t\u00f6mb\u00f6ket, az akkumul\u00e1tort\u00e1rol\u00f3 rendszereket (BESS) \u00e9s az egyen\u00e1ram\u00fa gyorst\u00f6lt\u0151 h\u00e1l\u00f3zatokat.<\/p>\r\n<\/li>\r\n \t<li data-start=\"1012\" data-end=\"1174\">\r\n<p data-start=\"1014\" data-end=\"1174\"><strong data-start=\"1014\" data-end=\"1047\">Egyir\u00e1ny\u00fa MOV kiv\u00e1laszt\u00e1s<\/strong>: Az egyen\u00e1ram\u00fa polarit\u00e1shoz az egyen\u00e1ram\u00fa SPD-k egyir\u00e1ny\u00fa MOV-okat haszn\u00e1lnak, biztos\u00edtva a megfelel\u0151 t\u00falfesz\u00fclts\u00e9g-lek\u00f6t\u00e9st az egyir\u00e1ny\u00fa \u00e1ram\u00e1raml\u00e1shoz.<\/p>\r\n<\/li>\r\n \t<li data-start=\"1175\" data-end=\"1364\">\r\n<p data-start=\"1177\" data-end=\"1364\"><strong data-start=\"1177\" data-end=\"1196\">\u00cdv elnyom\u00e1s<\/strong>: Mivel az egyen\u00e1ramb\u00f3l hi\u00e1nyzik a nulla keresztez\u00e9s, az egyen\u00e1ram\u00fa SPD-k gyors m\u0171k\u00f6d\u00e9s\u0171 h\u0151lev\u00e1laszt\u00f3kat, g\u00e1zkis\u00fcl\u00e9si cs\u00f6veket (GDT) vagy \u00edvkamr\u00e1kat integr\u00e1lnak a hiba\u00e1ramok biztons\u00e1gos megszak\u00edt\u00e1s\u00e1hoz.<\/p>\r\n<\/li>\r\n \t<li data-start=\"1365\" data-end=\"1538\">\r\n<p data-start=\"1367\" data-end=\"1538\"><strong data-start=\"1367\" data-end=\"1390\">Nagy t\u00falfesz\u00fclts\u00e9g kezel\u00e9se<\/strong>: Nagy energi\u00e1j\u00fa t\u00falfesz\u00fclts\u00e9gek elnyel\u00e9s\u00e9re tervezt\u00e9k, ak\u00e1r 20\u201340 kA (8\/20 \u00b5s) In\/Imax n\u00e9vleges \u00e9rt\u00e9kkel \u00e9s 1+2 t\u00edpus\u00fa eszk\u00f6z\u00f6kkel, amelyek Iimp vill\u00e1mimpulzusra lettek m\u00e9retezve.<\/p>\r\n<\/li>\r\n \t<li data-start=\"1539\" data-end=\"1855\">\r\n<p data-start=\"1541\" data-end=\"1576\"><strong data-start=\"1541\" data-end=\"1573\">Megfelel\u0151s\u00e9g \u00e9s tan\u00fas\u00edt\u00e1s<\/strong>:<\/p>\r\n\r\n<ul data-start=\"1579\" data-end=\"1855\">\r\n \t<li data-start=\"1579\" data-end=\"1699\">\r\n<p data-start=\"1581\" data-end=\"1699\">Meg kell felelnie az IEC 61643-31 (PV DC SPD-khez) vagy <a href=\"https:\/\/www.nemasurge.org\/ul-1449-transient-voltage-surge-suppressors\/\" target=\"_blank\" rel=\"noopener\"><strong data-start=\"1635\" data-end=\"1646\">UL 1449<\/strong><\/a> (\u00c9szak-Amerika egyen\u00e1ram\u00fa rendszereihez 1500 V DC-ig).<\/p>\r\n<\/li>\r\n \t<li data-start=\"1702\" data-end=\"1855\">\r\n<p data-start=\"1704\" data-end=\"1855\">A projektt\u0151l vagy a region\u00e1lis k\u00f6vetelm\u00e9nyekt\u0151l f\u00fcgg\u0151en a term\u00e9kek tov\u00e1bbi T\u00dcV-, CB- vagy UL-tan\u00fas\u00edtv\u00e1nnyal rendelkezhetnek a h\u00e1l\u00f3zati megfelel\u0151s\u00e9g \u00e9s a biztons\u00e1gi auditok tekintet\u00e9ben.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<h3 data-start=\"1857\" data-end=\"1906\">Az egyen\u00e1ram\u00fa t\u00falfesz\u00fclts\u00e9g-v\u00e9delem tipikus alkalmaz\u00e1sai<\/h3>\r\n<ul data-start=\"1907\" data-end=\"2261\">\r\n \t<li data-start=\"1907\" data-end=\"1999\">\r\n<p data-start=\"1909\" data-end=\"1999\">Napelemes PV t\u00f6mb\u00f6k (sztring vagy kombin\u00e1l\u00f3doboz v\u00e9delem, jellemz\u0151en 1000 Vdc vagy 1500 Vdc).<\/p>\r\n<\/li>\r\n \t<li data-start=\"2000\" data-end=\"2084\">\r\n<p data-start=\"2002\" data-end=\"2084\">Akkumul\u00e1toros energiat\u00e1rol\u00f3 rendszerek (BESS) grid-m\u00e9ret\u0171 vagy mikrogrid megold\u00e1sokhoz.<\/p>\r\n<\/li>\r\n \t<li data-start=\"2085\" data-end=\"2162\">\r\n<p data-start=\"2087\" data-end=\"2162\">Elektromos j\u00e1rm\u0171 (EV) t\u00f6lt\u0151\u00e1llom\u00e1sok, k\u00fcl\u00f6n\u00f6sen egyen\u00e1ram\u00fa gyorst\u00f6lt\u00e9s.<\/p>\r\n<\/li>\r\n \t<li data-start=\"2163\" data-end=\"2261\">\r\n<p data-start=\"2165\" data-end=\"2261\">T\u00e1vk\u00f6zl\u00e9si tornyok \u00e9s meg\u00fajul\u00f3 energiarendszerek (sz\u00e9lturbina-\u00e1talak\u00edt\u00f3k, hibrid egyen\u00e1ram\u00fa h\u00e1l\u00f3zatok).<\/p>\r\n<\/li>\r\n<\/ul>\r\n<h3 data-start=\"2263\" data-end=\"2304\">P\u00e9ld\u00e1k innen <span style=\"text-decoration: underline;\"><a href=\"https:\/\/www.britecelectric.com\/hu\/product-category\/dc-surge-protector\/\" target=\"_blank\" rel=\"noopener\">Britec DC SPD-je<\/a><\/span> Hat\u00f3t\u00e1vols\u00e1g<\/h3>\r\n<ul data-start=\"2305\" data-end=\"2976\">\r\n \t<li data-start=\"2305\" data-end=\"2630\">\r\n<p data-start=\"2307\" data-end=\"2341\"><a href=\"https:\/\/www.britecelectric.com\/hu\/product\/brpv3-1000-20-1000v-20ka-t12-pv-surge-arrester\/\" target=\"_blank\" rel=\"noopener\"><em><strong data-start=\"2307\" data-end=\"2339\">BRPV3-1000 (1+2. t\u00edpus\u00fa DC SPD)<\/strong><\/em><\/a><\/p>\r\n\r\n<ul data-start=\"2344\" data-end=\"2630\">\r\n \t<li data-start=\"2344\" data-end=\"2381\">\r\n<p data-start=\"2346\" data-end=\"2381\">N\u00e9vleges fesz\u00fclts\u00e9g: Uc = 1000 Vdc<\/p>\r\n<\/li>\r\n \t<li data-start=\"2384\" data-end=\"2429\">\r\n<p data-start=\"2386\" data-end=\"2429\">N\u00e9vleges kis\u00fcl\u00e9si \u00e1ram: In = 20 kA<\/p>\r\n<\/li>\r\n \t<li data-start=\"2432\" data-end=\"2489\">\r\n<p data-start=\"2434\" data-end=\"2489\">Maxim\u00e1lis kis\u00fcl\u00e9si \u00e1ram: Imax = 40 kA (8\/20 \u00b5s)<\/p>\r\n<\/li>\r\n \t<li data-start=\"2492\" data-end=\"2537\">\r\n<p data-start=\"2494\" data-end=\"2537\">Fesz\u00fclts\u00e9gv\u00e9delmi szint: Up \u2264 3,8 kV<\/p>\r\n<\/li>\r\n \t<li data-start=\"2540\" data-end=\"2630\">\r\n<p data-start=\"2542\" data-end=\"2630\">Jellemz\u0151k: H\u0151szakaszol\u00f3 + t\u00e1vjelz\u00e9s a val\u00f3s idej\u0171 monitoroz\u00e1shoz.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<\/li>\r\n \t<li data-start=\"2632\" data-end=\"2976\">\r\n<p data-start=\"2634\" data-end=\"2668\"><a href=\"https:\/\/www.britecelectric.com\/hu\/product\/brpv3-1500-12-5-t1t2-1500v-12-5ka-pv-surge-protection-device\/\" target=\"_blank\" rel=\"noopener\"><strong data-start=\"2634\" data-end=\"2666\">BRPV3-1500 (1+2. t\u00edpus\u00fa DC SPD)<\/strong><\/a><\/p>\r\n\r\n<ul data-start=\"2671\" data-end=\"2976\">\r\n \t<li data-start=\"2671\" data-end=\"2708\">\r\n<p data-start=\"2673\" data-end=\"2708\">N\u00e9vleges fesz\u00fclts\u00e9g: Uc = 1500 Vdc<\/p>\r\n<\/li>\r\n \t<li data-start=\"2711\" data-end=\"2756\">\r\n<p data-start=\"2713\" data-end=\"2756\">N\u00e9vleges kis\u00fcl\u00e9si \u00e1ram: In = 20 kA<\/p>\r\n<\/li>\r\n \t<li data-start=\"2759\" data-end=\"2806\">\r\n<p data-start=\"2761\" data-end=\"2806\">Maxim\u00e1lis kis\u00fcl\u00e9si \u00e1ram: Imax = 40 kA<\/p>\r\n<\/li>\r\n \t<li data-start=\"2809\" data-end=\"2854\">\r\n<p data-start=\"2811\" data-end=\"2854\">Fesz\u00fclts\u00e9gv\u00e9delmi szint: Up \u2264 4,5 kV<\/p>\r\n<\/li>\r\n \t<li data-start=\"2857\" data-end=\"2976\">\r\n<p data-start=\"2859\" data-end=\"2976\">Jellemz\u0151k: \u00cdvkamra kialak\u00edt\u00e1s + h\u0151lez\u00e1r\u00e1s, megb\u00edzhat\u00f3 m\u0171k\u00f6d\u00e9st biztos\u00edtva PV er\u0151m\u0171vekben \u00e9s elektromos j\u00e1rm\u0171vek infrastrukt\u00far\u00e1j\u00e1ban.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<h2>4. Mi a k\u00fcl\u00f6nbs\u00e9g a v\u00e1lt\u00f3\u00e1ram\u00fa \u00e9s egyen\u00e1ram\u00fa t\u00falfesz\u00fclts\u00e9g-v\u00e9delem k\u00f6z\u00f6tt?<\/h2>\r\nB\u00e1r az AC SPD-k \u00e9s az egyen\u00e1ram\u00fa SPD-k els\u0151 pillant\u00e1sra hasonl\u00f3nak t\u0171nnek, tervez\u00e9si elveik, szabv\u00e1nyaik \u00e9s alkalmaz\u00e1si k\u00f6vetelm\u00e9nyeik nagyon elt\u00e9r\u0151ek. Az al\u00e1bbi t\u00e1bl\u00e1zat \u00f6sszefoglalja az AC SPD \u00e9s a DC SPD k\u00f6z\u00f6tti f\u0151bb k\u00fcl\u00f6nbs\u00e9geket:\r\n<table style=\"width: 100%; height: 336px;\">\r\n<thead>\r\n<tr style=\"height: 24px;\">\r\n<th style=\"height: 24px;\"><strong>Param\u00e9ter<\/strong><\/th>\r\n<th style=\"height: 24px;\"><strong>AC SPD<\/strong><\/th>\r\n<th style=\"height: 24px;\"><strong>DC SPD<\/strong><\/th>\r\n<\/tr>\r\n<\/thead>\r\n<tbody>\r\n<tr style=\"height: 48px;\">\r\n<td style=\"height: 48px;\"><strong>Fesz\u00fclts\u00e9g tartom\u00e1ny<\/strong><\/td>\r\n<td style=\"height: 48px;\">115V \u2013 690V AC (k\u00f6z\u00f6s h\u00e1l\u00f3zatok) P\u00e9lda: BR-40 (Uc 275 V, In 20 kA)<\/td>\r\n<td style=\"height: 48px;\">500V \u2013 1500V DC (PV, EV, BESS) P\u00e9lda: BRPV3-1500 (Uc 1500 Vdc, 20 kA-ban)<\/td>\r\n<\/tr>\r\n<tr style=\"height: 24px;\">\r\n<td style=\"height: 24px;\"><strong>Polarit\u00e1skezel\u00e9s<\/strong><\/td>\r\n<td style=\"height: 24px;\">K\u00e9tir\u00e1ny\u00fa m\u0171k\u00f6d\u00e9s (AC szinuszos polarit\u00e1s v\u00e1lt\u00e1s)<\/td>\r\n<td style=\"height: 24px;\">Egyir\u00e1ny\u00fa MOV-v\u00e1laszt\u00e1s a DC polarit\u00e1s stabilit\u00e1s\u00e1hoz<\/td>\r\n<\/tr>\r\n<tr style=\"height: 48px;\">\r\n<td style=\"height: 48px;\"><strong>\u00cdv olt\u00e1s<\/strong><\/td>\r\n<td style=\"height: 48px;\">Term\u00e9szetes nulla-\u00e1tl\u00e9p\u00e9st seg\u00edt\u0151 \u00edvmegszak\u00edt\u00e1s Az 1-es t\u00edpus\u00fa SPD-k gyakran MOV + GDT\/\u00edvkamr\u00e1t haszn\u00e1lnak 10\/350 \u00b5s impulzusokhoz<\/td>\r\n<td style=\"height: 48px;\">Nincs nulla \u00e1tl\u00e9p\u00e9s \u2192 gyors termikus szakaszol\u00f3t, \u00edvkamr\u00e1t vagy GDT-t ig\u00e9nyel<\/td>\r\n<\/tr>\r\n<tr style=\"height: 24px;\">\r\n<td style=\"height: 24px;\"><strong>V\u00e1laszid\u0151<\/strong><\/td>\r\n<td style=\"height: 24px;\">A MOV-alap\u00fa SPD-k \u00e1ltal\u00e1ban &lt;25 ns alatt v\u00e1laszolnak (eszk\u00f6zf\u00fcgg\u0151)<\/td>\r\n<td style=\"height: 24px;\">Ugyanaz az elv \u2013 MOV-alap\u00fa, &lt;25 ns (eszk\u00f6zf\u00fcgg\u0151)<\/td>\r\n<\/tr>\r\n<tr style=\"height: 24px;\">\r\n<td style=\"height: 24px;\"><strong>Hull\u00e1mforma t\u00edpusa<\/strong><\/td>\r\n<td style=\"height: 24px;\">Szinuszos (50\/60 Hz)<\/td>\r\n<td style=\"height: 24px;\">\u00c1lland\u00f3 egyenfesz\u00fclts\u00e9g<\/td>\r\n<\/tr>\r\n<tr style=\"height: 48px;\">\r\n<td style=\"height: 48px;\"><strong>T\u00falfesz\u00fclts\u00e9g-teszt hull\u00e1mform\u00e1i<\/strong><\/td>\r\n<td style=\"height: 48px;\">8\/20 \u00b5s (kapcsol\u00e1s), 10\/350 \u00b5s (vill\u00e1m\u00e1ram, 1. t\u00edpus)<\/td>\r\n<td style=\"height: 48px;\">Szabv\u00e1nyos\u00edtva ugyanaz, mint az AC (8\/20 \u00b5s, 10\/350 \u00b5s); kulcsk\u00fcl\u00f6nbs\u00e9g = \u00edvkiolt\u00e1s<\/td>\r\n<\/tr>\r\n<tr style=\"height: 48px;\">\r\n<td style=\"height: 48px;\"><strong>Energiakezel\u00e9s<\/strong><\/td>\r\n<td style=\"height: 48px;\">A p\u00f3lusonk\u00e9nti besorol\u00e1s a kialak\u00edt\u00e1st\u00f3l f\u00fcgg (ellen\u0151rizze az adatlapot: In\/Imax\/Iimp) P\u00e9lda: <strong>BR-30FU (20 kA-ban, max. 40 kA)<\/strong><\/td>\r\n<td style=\"height: 48px;\">A p\u00f3lusonk\u00e9nti n\u00e9vleges \u00e9rt\u00e9k a kialak\u00edt\u00e1st\u00f3l f\u00fcgg (In\/Imax\/Iimp) P\u00e9lda: BRPV3-1000 (In 20 kA, Imax 40 kA)<\/td>\r\n<\/tr>\r\n<tr style=\"height: 24px;\">\r\n<td style=\"height: 24px;\"><strong>Szabv\u00e1nyok<\/strong><\/td>\r\n<td style=\"height: 24px;\">IEC 61643-11 (AC SPD), UL 1449 (\u00c9szak-Amerika)<\/td>\r\n<td style=\"height: 24px;\">IEC 61643-31 (DC SPD-k, PV), UL 1449 (\u00c9szak-Amerika, PV \u22641500 Vdc)<\/td>\r\n<\/tr>\r\n<tr style=\"height: 24px;\">\r\n<td style=\"height: 24px;\"><strong>Alkalmaz\u00e1sok<\/strong><\/td>\r\n<td style=\"height: 24px;\">Otthonok, irod\u00e1k, ipari k\u00f6zpontok, \u00e9p\u00fcleteloszt\u00f3k<\/td>\r\n<td style=\"height: 24px;\">Napelem t\u00f6mb\u00f6k, akkumul\u00e1tor t\u00e1rol\u00e1s, elektromos j\u00e1rm\u0171vek t\u00f6lt\u00e9se, telekommunik\u00e1ci\u00f3, sz\u00e9lturbin\u00e1k<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<h3>4.1 Elektromos \u00e1ramjellemz\u0151k: AC vs. DC<\/h3>\r\nAz AC periodikusan megford\u00edtja az ir\u00e1nyt (szinuszhull\u00e1m), lehet\u0151v\u00e9 t\u00e9ve a term\u00e9szetes nulla-keresztez\u00e9si pontokat. Az egyen\u00e1ram egy ir\u00e1nyban \u00e1ramlik folyamatosan (lapos hull\u00e1mforma), \u00edgy az \u00edvolt\u00e1s sokkal nagyobb kih\u00edv\u00e1st jelent.\r\n\r\n<strong>K\u00f6vetkezm\u00e9ny:<\/strong>\r\n<blockquote>Az AC SPD-k sz\u00e1m\u00e1ra el\u0151ny\u00f6s a nulla keresztez\u00e9s az \u00edv megszak\u00edt\u00e1s\u00e1ra, m\u00edg az egyen\u00e1ram\u00fa SPD-k robusztusabb \u00edvelnyom\u00f3 mechanizmusokat ig\u00e9nyelnek a hull\u00e1mforma jellemz\u0151i miatt.<\/blockquote>\r\n<h3>4.2 Surge Waveform<\/h3>\r\n<ul data-spread=\"false\">\r\n \t<li>Az AC t\u00falfesz\u00fclts\u00e9gek gyakran sim\u00e1bb, szinuszos hull\u00e1mform\u00e1j\u00faak.<\/li>\r\n \t<li>Az egyen\u00e1ram\u00fa t\u00falfesz\u00fclts\u00e9gek lapos fels\u0151 fesz\u00fclts\u00e9g mellett r\u00f6videbbek, gyorsabbak \u00e9s hirtelenebbek<\/li>\r\n<\/ul>\r\n<strong>V\u00e1laszid\u0151ig\u00e9ny:<\/strong>\r\n<blockquote>Az egyen\u00e1ram\u00fa SPD-k \u00e1ltal\u00e1ban gyorsabb v\u00e1laszid\u0151t (\u226425n) ig\u00e9nyelnek a gyors tranziensek elleni v\u00e9delem \u00e9rdek\u00e9ben.<\/blockquote>\r\n<h3>4.3 Az SPD-k tervez\u00e9se \u00e9s m\u0171k\u00f6d\u00e9si elvei<\/h3>\r\n<ul data-spread=\"false\">\r\n \t<li><strong>AC SPD:<\/strong> Szimmetrikus fesz\u00fclts\u00e9gpolarit\u00e1sra \u00e9s szinuszos bemenetre tervezt\u00e9k<\/li>\r\n \t<li><strong>DC SPD:<\/strong> Polarit\u00e1s\u00e9rz\u00e9keny \u00e1ramk\u00f6r\u00f6kh\u00f6z \u00e9s egyir\u00e1ny\u00fa \u00e1ram\u00e1raml\u00e1shoz k\u00e9sz\u00fclt<\/li>\r\n<\/ul>\r\n<strong>Alkalmazott technol\u00f3gia: <\/strong>Mind az AC, mind az egyen\u00e1ram\u00fa SPD eszk\u00f6z\u00f6k \u00e1ltal\u00e1ban MOV-okat (f\u00e9m-oxid varisztorokat), termikus lev\u00e1laszt\u00f3kat \u00e9s n\u00e9ha GDT-ket (g\u00e1zkis\u00fcl\u00e9si cs\u00f6veket) haszn\u00e1lnak. Ha meg szeretn\u00e9 \u00e9rteni, hogyan m\u0171k\u00f6dnek ezek az \u00f6sszetev\u0151k a t\u00falfesz\u00fclts\u00e9g-v\u00e9delmi eszk\u00f6z\u00f6k\u00f6n bel\u00fcl, tekintse meg r\u00e9szletes \u00fatmutat\u00f3nkat <strong><em><a href=\"https:\/\/www.britecelectric.com\/hu\/blog\/how-does-spd-surge-protection-device-work\/\" target=\"_blank\" rel=\"noopener\">hogyan m\u0171k\u00f6dik egy SPD<\/a>.<\/em><\/strong>\r\n<h3>4.4 N\u00e9vleges fesz\u00fclts\u00e9g \u00e9s t\u00falfesz\u00fclts\u00e9g-kapacit\u00e1s<\/h3>\r\n<ul data-spread=\"false\">\r\n \t<li>AC SPD: 115V \u00e9s 600V k\u00f6z\u00f6tt<\/li>\r\n \t<li>DC SPD-k: 500V \u00e9s 1500V k\u00f6z\u00f6tt<\/li>\r\n<\/ul>\r\n<strong>P\u00e9lda:<\/strong>\r\n<blockquote>DC SPD FLY1-40PV 40kA-ig kezeli; Az AC SPD USP2 modellt\u0151l f\u00fcgg\u0151en 120 kA-ig terjed.<\/blockquote>\r\n<h3>4.5 Alkalmaz\u00e1si k\u00f6rnyezetek<\/h3>\r\n<ul data-spread=\"false\">\r\n \t<li><strong>AC SPD:<\/strong> Irod\u00e1k, otthonok, HVAC, k\u00f6zpontok<\/li>\r\n \t<li><strong>DC SPD:<\/strong> Meg\u00fajul\u00f3 energia, k\u00fclt\u00e9ri telekommunik\u00e1ci\u00f3, k\u00f6zleked\u00e9si rendszerek<\/li>\r\n<\/ul>\r\n<strong>K\u00f6rnyezeti tolerancia:<\/strong>\r\n<blockquote>Az egyen\u00e1ram\u00fa SPD-k \u00e1ltal\u00e1ban sz\u00e9lesebb h\u0151m\u00e9rs\u00e9klet-tartom\u00e1nyokat \u00e9s relat\u00edv p\u00e1ratartalmat t\u00e1mogatnak a k\u00fclt\u00e9ri alkalmaz\u00e1sok miatt.<\/blockquote>\r\n<h3>4.6 \u00cdv olt\u00e1s<\/h3>\r\n<ul data-spread=\"false\">\r\n \t<li><strong>AC:<\/strong> Az \u00edv term\u00e9szetesen kialszik a nulla keresztez\u0151d\u00e9sn\u00e9l<\/li>\r\n \t<li><strong>DC:<\/strong> Mechanikus\/termikus \u00edvolt\u00e1st ig\u00e9nyel a polarit\u00e1sv\u00e1lt\u00e1s hi\u00e1nya miatt.<\/li>\r\n<\/ul>\r\n<strong>Mi\u00e9rt sz\u00e1m\u00edt:<\/strong>\r\n<blockquote>Az egyen\u00e1ram\u00fa t\u00falfesz\u00fclts\u00e9g-levezet\u0151k nem megfelel\u0151 \u00edvelnyom\u00e1sa termikus kifut\u00e1shoz \u00e9s t\u00fczet okozhat.<\/blockquote>\r\n<h3>4.7 Szabv\u00e1nyok, tesztel\u00e9s \u00e9s tan\u00fas\u00edt\u00e1s<\/h3>\r\n<ul data-spread=\"false\">\r\n \t<li><strong>AC SPD szabv\u00e1nyok:<\/strong> UL 1449, IEC 61643-11 (1., 2., 3. t\u00edpus)<\/li>\r\n \t<li><strong>DC SPD szabv\u00e1nyok:<\/strong> EN 50539-11, IEC 61643-31, UL 1449 (PV, BESS, EV f\u00f3kusz)<\/li>\r\n<\/ul>\r\n<strong>P\u00e9lda:<\/strong>\r\n<blockquote>A t\u00falfesz\u00fclts\u00e9g-v\u00e9delmi oszt\u00e1lyt TUV-tan\u00fas\u00edtv\u00e1nnyal rendelkez\u0151 SPD-c\u00edmk\u00e9kkel kell ellen\u0151rizni a h\u00e1l\u00f3zat megfelel\u0151s\u00e9ge \u00e9rdek\u00e9ben.<\/blockquote>\r\n<h2>5. Hogyan v\u00e1lasszuk ki a megfelel\u0151 SPD-t<\/h2>\r\n<p data-start=\"408\" data-end=\"648\">A megfelel\u0151 t\u00falfesz\u00fclts\u00e9g-v\u00e9delmi eszk\u00f6z (SPD) kiv\u00e1laszt\u00e1sa nem csak a fesz\u00fclts\u00e9gr\u0151l sz\u00f3l, hanem a be\u00e9p\u00edt\u00e9si helyzetr\u0151l, a v\u00e9delem \u00f6sszehangol\u00e1s\u00e1r\u00f3l \u00e9s a nemzetk\u00f6zi szabv\u00e1nyoknak val\u00f3 megfelel\u00e9sr\u0151l is. Itt vannak a legfontosabb t\u00e9nyez\u0151k, amelyeket figyelembe kell venni:<\/p>\r\n\r\n<h3 data-start=\"655\" data-end=\"700\">1. Illessze az SPD-t a rendszerfesz\u00fclts\u00e9ghez<\/h3>\r\n<ul data-start=\"701\" data-end=\"1201\">\r\n \t<li data-start=\"701\" data-end=\"930\">\r\n<p data-start=\"703\" data-end=\"744\"><strong data-start=\"703\" data-end=\"742\">AC rendszerek (IEC 61643-11 \/ UL 1449)<\/strong><\/p>\r\n\r\n<ul data-start=\"747\" data-end=\"930\">\r\n \t<li data-start=\"747\" data-end=\"803\">\r\n<p data-start=\"749\" data-end=\"803\">230\/400 V (TN\/TT r\u00e1csok): V\u00e1lasszon <strong data-start=\"781\" data-end=\"793\">Uc 275 V<\/strong> modellek.<\/p>\r\n<\/li>\r\n \t<li data-start=\"806\" data-end=\"930\">\r\n<p data-start=\"808\" data-end=\"930\">P\u00e9lda: Britec BR-40\/30FU \u2013 2. t\u00edpus\u00fa SPD, Uc 275 V, 20 kA, Imax 40 kA, be\u00e9p\u00edtett biztos\u00edt\u00e9kkal a tartal\u00e9k v\u00e9delem \u00e9rdek\u00e9ben.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<\/li>\r\n \t<li data-start=\"931\" data-end=\"1201\">\r\n<p data-start=\"933\" data-end=\"987\"><strong data-start=\"933\" data-end=\"985\">PV DC rendszerek (IEC 61643-31 \/ UL 1449 \u22641500 Vdc)<\/strong><\/p>\r\n\r\n<ul data-start=\"990\" data-end=\"1201\">\r\n \t<li data-start=\"990\" data-end=\"1062\">\r\n<p data-start=\"992\" data-end=\"1062\">600 Vdc, 1000 Vdc vagy 1500 Vdc t\u00f6mb\u00f6k: V\u00e1lassza ki a megfelel\u0151 DC Uc besorol\u00e1st.<\/p>\r\n<\/li>\r\n \t<li data-start=\"1065\" data-end=\"1201\">\r\n<p data-start=\"1067\" data-end=\"1201\">P\u00e9lda: <strong data-start=\"1076\" data-end=\"1111\">Britec BRPV3-1000 (Uc 1000 Vdc)<\/strong> vagy <strong data-start=\"1115\" data-end=\"1143\">BRPV3-1500 (Uc 1500 Vdc)<\/strong> \u2013 1+2 t\u00edpus\u00fa egyen\u00e1ram\u00fa SPD PV kombin\u00e1l\u00f3dobozokhoz \u00e9s inverterekhez.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<p data-start=\"1203\" data-end=\"1342\"><strong data-start=\"1205\" data-end=\"1212\">Tipp<\/strong>: Mindig ellen\u0151rizze, hogy az SPD Uc (folyamatos \u00fczemi fesz\u00fclts\u00e9ge) \u2265 1,2 \u00d7 n\u00e9vleges rendszerfesz\u00fclts\u00e9g az id\u0151 el\u0151tti \u00f6reged\u00e9s elker\u00fcl\u00e9se \u00e9rdek\u00e9ben.<\/p>\r\n\r\n<h3 data-start=\"1349\" data-end=\"1424\">2. Alkalmazza a megfelel\u0151 v\u00e9delmi oszt\u00e1lyt (t\u00edpust) minden telep\u00edt\u00e9si szintre<\/h3>\r\n<ul data-start=\"1425\" data-end=\"2052\">\r\n \t<li data-start=\"1425\" data-end=\"1627\">\r\n<p data-start=\"1427\" data-end=\"1469\">1. t\u00edpus (10\/350 \u00b5s vill\u00e1m\u00e1ram)<\/p>\r\n\r\n<ul data-start=\"1472\" data-end=\"1627\">\r\n \t<li data-start=\"1472\" data-end=\"1530\">\r\n<p data-start=\"1474\" data-end=\"1530\">Szervizbej\u00e1ratra \/ f\u0151eloszt\u00f3ra szerelve.<\/p>\r\n<\/li>\r\n \t<li data-start=\"1533\" data-end=\"1571\">\r\n<p data-start=\"1535\" data-end=\"1571\">Kezeli a k\u00f6zvetlen vill\u00e1m\u00e1ramot.<\/p>\r\n<\/li>\r\n \t<li data-start=\"1574\" data-end=\"1627\">\r\n<p data-start=\"1576\" data-end=\"1627\">P\u00e9lda: <strong data-start=\"1585\" data-end=\"1610\">BR-12.5M Type 1+2 SPD<\/strong>, Iimp 12,5 kA.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<\/li>\r\n \t<li data-start=\"1628\" data-end=\"1865\">\r\n<p data-start=\"1630\" data-end=\"1669\">2. t\u00edpus (8\/20 \u00b5s kapcsol\u00e1si t\u00falfesz\u00fclts\u00e9g)<\/p>\r\n\r\n<ul data-start=\"1672\" data-end=\"1865\">\r\n \t<li data-start=\"1672\" data-end=\"1719\">\r\n<p data-start=\"1674\" data-end=\"1719\">Padl\u00f3eloszt\u00f3 t\u00e1bl\u00e1kra szerelve.<\/p>\r\n<\/li>\r\n \t<li data-start=\"1722\" data-end=\"1792\">\r\n<p data-start=\"1724\" data-end=\"1792\">V\u00e9d a kapcsol\u00e1si t\u00falfesz\u00fclts\u00e9gek \u00e9s a marad\u00e9k vill\u00e1m\u00e1ramok ellen.<\/p>\r\n<\/li>\r\n \t<li data-start=\"1795\" data-end=\"1865\">\r\n<p data-start=\"1797\" data-end=\"1865\">P\u00e9lda: <strong data-start=\"1806\" data-end=\"1831\">BR-40\/30FU Type 2 SPD<\/strong> (be\u00e9p\u00edtett szakaszol\u00f3val).<\/p>\r\n<\/li>\r\n<\/ul>\r\n<\/li>\r\n \t<li data-start=\"1866\" data-end=\"2052\">\r\n<p data-start=\"1868\" data-end=\"1895\">3. t\u00edpus (haszn\u00e1lati hely)<\/p>\r\n\r\n<ul data-start=\"1898\" data-end=\"2052\">\r\n \t<li data-start=\"1898\" data-end=\"1983\">\r\n<p data-start=\"1900\" data-end=\"1983\">\u00c9rz\u00e9keny berendez\u00e9sek (sz\u00e1m\u00edt\u00f3g\u00e9pek, szerverek, orvosi eszk\u00f6z\u00f6k) k\u00f6zel\u00e9be telep\u00edtve.<\/p>\r\n<\/li>\r\n \t<li data-start=\"1986\" data-end=\"2052\">\r\n<p data-start=\"1988\" data-end=\"2052\">V\u00e9delmet ny\u00fajt a visszamarad\u00f3 t\u00falfesz\u00fclts\u00e9gek ellen, amelyeket a felfel\u00e9 ir\u00e1nyul\u00f3 SPD-k nem r\u00f6gz\u00edtenek.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<p data-start=\"2054\" data-end=\"2204\"><strong data-start=\"2056\" data-end=\"2076\">M\u00e9rn\u00f6ki szab\u00e1ly<\/strong>: Ha a k\u00e1bel hossza k\u00e9t v\u00e9delmi fokozat k\u00f6z\u00f6tt van <strong data-start=\"2131\" data-end=\"2140\">&gt;<\/strong>10 m-re, szereljen fel tov\u00e1bbi SPD-ket mindk\u00e9t v\u00e9g\u00e9re a koordin\u00e1ci\u00f3 biztos\u00edt\u00e1sa \u00e9rdek\u00e9ben.<\/p>\r\n\r\n<h3 data-start=\"2211\" data-end=\"2261\">3. Biztos\u00edtsa az \u00f6sszehangol\u00e1st a megszak\u00edt\u00f3kkal \u00e9s biztos\u00edt\u00e9kokkal<\/h3>\r\n<ul data-start=\"2262\" data-end=\"2455\">\r\n \t<li data-start=\"2262\" data-end=\"2330\">\r\n<p data-start=\"2264\" data-end=\"2330\">Az SPD-ket \u00f6ssze kell hangolni a felfel\u00e9 ir\u00e1nyul\u00f3 MCB\/RCB\/tartal\u00e9k biztos\u00edt\u00e9kokkal.<\/p>\r\n<\/li>\r\n \t<li data-start=\"2331\" data-end=\"2455\">\r\n<p data-start=\"2333\" data-end=\"2455\">N\u00e9h\u00e1ny modell, pl <strong data-start=\"2351\" data-end=\"2372\">Britec BR-40\/30FU<\/strong>, integr\u00e1lja a termikus szakaszol\u00f3kat \u00e9s a tartal\u00e9k v\u00e9delmet, cs\u00f6kkentve a helyet \u00e9s a k\u00f6lts\u00e9geket.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<h3 data-start=\"2462\" data-end=\"2496\">4. Szabv\u00e1nyoknak val\u00f3 megfelel\u00e9s<\/h3>\r\n<ul data-start=\"2497\" data-end=\"2605\">\r\n \t<li data-start=\"2497\" data-end=\"2543\">\r\n<p data-start=\"2499\" data-end=\"2543\"><strong data-start=\"2499\" data-end=\"2510\">AC SPD-k<\/strong>: IEC 61643-11, UL 1449<\/p>\r\n<\/li>\r\n \t<li data-start=\"2544\" data-end=\"2605\">\r\n<p data-start=\"2546\" data-end=\"2605\"><strong data-start=\"2546\" data-end=\"2560\">PV DC SPD-k<\/strong>: IEC 61643-31, UL 1449 (\u22641500 Vdc)<\/p>\r\n<\/li>\r\n<\/ul>\r\n<p data-start=\"2607\" data-end=\"2731\">Mindig gy\u0151z\u0151dj\u00f6n meg arr\u00f3l, hogy az SPD rendelkezik a megfelel\u0151 CE, UL vagy IEC vizsg\u00e1lati tan\u00fas\u00edtv\u00e1nnyal, k\u00fcl\u00f6n\u00f6sen nemzetk\u00f6zi projektek eset\u00e9n.<\/p>\r\n\r\n<h3 data-start=\"2738\" data-end=\"2756\">Kulcs elvitel<\/h3>\r\n<p data-start=\"2757\" data-end=\"2931\">A megfelel\u0151 SPD kiv\u00e1laszt\u00e1sa a fesz\u00fclts\u00e9g illeszt\u00e9s\u00e9t, a megfelel\u0151 T\u00edpus kiv\u00e1laszt\u00e1s\u00e1t telep\u00edt\u00e9si szintenk\u00e9nt, a megfelel\u0151 koordin\u00e1ci\u00f3 biztos\u00edt\u00e1s\u00e1t \u00e9s az IEC\/UL szabv\u00e1nyok betart\u00e1s\u00e1t jelenti.<\/p>\r\n<p data-start=\"2933\" data-end=\"3142\">Vel <strong data-start=\"2938\" data-end=\"3007\">Britec portf\u00f3li\u00f3ja (BR-12.5M, BR-40\/30FU, BRPV3-1000, BRPV3-1500)<\/strong>, lefedheti a lakoss\u00e1gi, kereskedelmi, ipari \u00e9s PV napelemes alkalmaz\u00e1sokat tan\u00fas\u00edtott, nagy teljes\u00edtm\u00e9ny\u0171 t\u00falfesz\u00fclts\u00e9g-v\u00e9delemmel.<\/p>\r\n\r\n<h2>6. K\u00f6vetkeztet\u00e9s<\/h2>\r\nAz AC \u00e9s DC t\u00falfesz\u00fclts\u00e9g-v\u00e9delmi eszk\u00f6z\u00f6k hasonl\u00f3nak t\u0171nhetnek, de alapvet\u0151en elt\u00e9r\u0151 rendszereket szolg\u00e1lnak ki. Az AC SPD-ket \u00e9p\u00fcletekben \u00e9s h\u00e1l\u00f3zatokban t\u00f6rt\u00e9n\u0151 szinuszos alkalmaz\u00e1sokhoz optimaliz\u00e1lt\u00e1k. Az egyen\u00e1ram\u00fa SPD-ket a meg\u00fajul\u00f3 \u00e9s nagyfesz\u00fclts\u00e9g\u0171 egyen\u00e1ram\u00fa infrastrukt\u00far\u00e1k lapos fesz\u00fclts\u00e9g\u0171 hull\u00e1mform\u00e1ira szabt\u00e1k.\r\n\r\n<strong>A megfelel\u0151 SPD kiv\u00e1laszt\u00e1sa elengedhetetlen a berendez\u00e9sek v\u00e9delme \u00e9s a biztons\u00e1gi el\u0151\u00edr\u00e1sok betart\u00e1sa \u00e9rdek\u00e9ben.<\/strong>\r\n\r\nAz optim\u00e1lis v\u00e9delem \u00e9rdek\u00e9ben:\r\n<ul data-spread=\"false\">\r\n \t<li>Mindig igaz\u00edtsa az SPD t\u00edpus\u00e1t az aktu\u00e1lis rendszerhez (AC vagy DC)<\/li>\r\n \t<li>Vegye figyelembe a n\u00e9vleges fesz\u00fclts\u00e9get, a hull\u00e1mforma jellemz\u0151it \u00e9s a sz\u00fcks\u00e9ges energiaelnyel\u00e9si k\u00e9pess\u00e9get.<\/li>\r\n \t<li>V\u00e1lasszon tan\u00fas\u00edtott term\u00e9keket (TUV, UL, CE), megfelel\u0151 t\u00falfesz\u00fclts\u00e9g-v\u00e9delmi oszt\u00e1lyokkal.<\/li>\r\n<\/ul>\r\n<a href=\"https:\/\/www.britecelectric.com\/hu\/contact-us\/\" target=\"_blank\" rel=\"noopener\"><strong>Seg\u00edts\u00e9gre van sz\u00fcks\u00e9ge az SPD kiv\u00e1laszt\u00e1s\u00e1hoz?<\/strong> L\u00e9pjen kapcsolatba egy min\u0151s\u00edtett elektromos szakemberrel vagy t\u00falfesz\u00fclts\u00e9g-v\u00e9delmi szolg\u00e1ltat\u00f3val, hogy megtal\u00e1lja a rendszer\u00e9hez megfelel\u0151 egyen\u00e1ram\u00fa t\u00falfesz\u00fclts\u00e9g-v\u00e9delmi vagy AC t\u00falfesz\u00fclts\u00e9g-v\u00e9delmi megold\u00e1st.<\/a>","protected":false},"featured_media":2114,"parent":0,"menu_order":130,"template":"","meta":{"_acf_changed":false},"blog_category":[9],"class_list":["post-2112","blog","type-blog","status-publish","has-post-thumbnail","hentry","blog_category-industry-news"],"acf":{"des":"This blog compares AC and DC surge protection devices (SPDs), explaining their key differences in waveform, voltage range, arc handling, and application scenarios. Whether you're protecting a home, solar system, or EV charger, understanding how to choose the right SPD is essential for system safety and compliance with standards like IEC 61643 and UL 1449.","txt":"Surge protection is fundamental to the safety and uptime of modern electrical systems. Choosing the right <a href=\"https:\/\/www.britecelectric.com\/products\/\" target=\"_blank\" rel=\"noopener\"><strong data-start=\"1300\" data-end=\"1333\">Surge Protective Device (SPD)<\/strong><\/a> starts with understanding how AC and DC systems behave differently under transients\u2014especially arc extinction (AC zero-crossing vs DC no zero-crossing) and component design (bi-directional vs uni-directional MOVs). This guide explains the difference between AC SPD and DC SPD, maps the IEC\/UL standards that apply, and shows how to select an SPD that meets your application and compliance needs.\r\n<h2>1. Introduction<\/h2>\r\nTransient overvoltages, also known as power surges, are short-duration spikes in voltage that can damage or destroy sensitive electronic equipment. These surges can be caused by lightning strikes, grid switching operations, large load switching, or inductive equipment startups. SPD devices, also called surge suppressors or surge arresters, are engineered to detect and divert these spikes before they reach protected equipment.\r\n\r\nBut not all surges\u2014or SPDs\u2014are created equal. AC (Alternating Current) and DC (Direct Current) systems exhibit very different electrical behaviors and, as such, require distinct surge protection approaches. Per <a href=\"https:\/\/webstore.iec.ch\/en\/publication\/26931\" target=\"_blank\" rel=\"noopener\"><strong><em>IEC 61643-11\/-31<\/em><\/strong><\/a>, an SPD limits surge voltage and diverts surge current within nanoseconds, protecting downstream equipment.\r\n<h2>2. What Is AC Surge Protection?<\/h2>\r\n<a href=\"https:\/\/www.britecelectric.com\/product-category\/ac-power-surge-protection\/\" rel=\"attachment wp-att-2114\"><img class=\"alignnone wp-image-2114\" src=\"https:\/\/www.britecelectric.com\/wp-content\/uploads\/2025\/06\/AC-Power-Surge-Protection-1024x1024.webp\" alt=\"\" width=\"600\" height=\"600\" \/><\/a>\r\n\r\n<a href=\"https:\/\/www.britecelectric.com\/product-category\/ac-power-surge-protection\/\" target=\"_blank\" rel=\"noopener\"><em><strong data-start=\"218\" data-end=\"241\">AC surge protection<\/strong><\/em><\/a> is designed for electrical systems where voltage alternates direction periodically\u2014typically at 50Hz or 60Hz. These systems are widely used in residential homes, commercial buildings, factories, and industrial automation networks. According to <a href=\"https:\/\/webstore.iec.ch\/en\/publication\/65314\" target=\"_blank\" rel=\"noopener\"><strong data-start=\"490\" data-end=\"506\">IEC 61643-11<\/strong><\/a>, AC SPDs are classified into Type 1, Type 2, and Type 3, each intended for a different installation point within the distribution system.\r\n<h3 data-start=\"652\" data-end=\"688\">Key Characteristics of AC SPDs<\/h3>\r\n<ul data-start=\"689\" data-end=\"1410\">\r\n \t<li data-start=\"689\" data-end=\"777\">\r\n<p data-start=\"691\" data-end=\"777\">Operate within common grid voltages such as 115V, 230V, 400V, and up to 690V AC.<\/p>\r\n<\/li>\r\n \t<li data-start=\"778\" data-end=\"857\">\r\n<p data-start=\"780\" data-end=\"857\">Bi-directional operation to handle polarity switching of AC sine waves.<\/p>\r\n<\/li>\r\n \t<li data-start=\"858\" data-end=\"983\">\r\n<p data-start=\"860\" data-end=\"983\">Arc extinction through natural zero-crossings of the AC waveform, which makes disconnection safer and more efficient.<\/p>\r\n<\/li>\r\n \t<li data-start=\"984\" data-end=\"1220\">\r\n<p data-start=\"986\" data-end=\"1220\">Commonly used MOVs (Metal Oxide Varistors) to absorb surge energy; in Type 1 SPDs, MOVs are often combined with GDTs (Gas Discharge Tubes) or arc chambers to withstand high-energy lightning impulses (10\/350 \u00b5s waveforms).<\/p>\r\n<\/li>\r\n \t<li data-start=\"1221\" data-end=\"1410\">\r\n<p data-start=\"1223\" data-end=\"1410\">Coordination with upstream protection (MCB or fuse) is required; best practice is to keep the SPD lead length as short as possible, ideally&lt;0.5 m, to minimize residual voltage.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<blockquote>\r\n<h3 data-start=\"1412\" data-end=\"1447\">SPD Types for AC Applications<\/h3>\r\n<ul data-start=\"1448\" data-end=\"1800\">\r\n \t<li data-start=\"1448\" data-end=\"1558\">\r\n<p data-start=\"1450\" data-end=\"1558\"><strong data-start=\"1450\" data-end=\"1464\">Type 1 SPD<\/strong> \u2013 Installed at the service entrance; withstands direct lightning currents (Iimp 10\/350 \u00b5s).<\/p>\r\n<\/li>\r\n \t<li data-start=\"1559\" data-end=\"1689\">\r\n<p data-start=\"1561\" data-end=\"1689\"><strong data-start=\"1561\" data-end=\"1575\">Type 2 SPD<\/strong> \u2013 Installed at distribution boards; protects against switching surges and indirect lightning (In\/Imax 8\/20 \u00b5s).<\/p>\r\n<\/li>\r\n \t<li data-start=\"1690\" data-end=\"1800\">\r\n<p data-start=\"1692\" data-end=\"1800\"><strong data-start=\"1692\" data-end=\"1706\">Type 3 SPD<\/strong> \u2013 Installed close to sensitive equipment; provides fine protection against residual surges.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<h3 data-start=\"1802\" data-end=\"1828\">Typical Applications<\/h3>\r\n<ul data-start=\"1829\" data-end=\"2053\">\r\n \t<li data-start=\"1829\" data-end=\"1870\">\r\n<p data-start=\"1831\" data-end=\"1870\">Main service entrance panels (Type 1)<\/p>\r\n<\/li>\r\n \t<li data-start=\"1871\" data-end=\"1912\">\r\n<p data-start=\"1873\" data-end=\"1912\">Building distribution boards (Type 2)<\/p>\r\n<\/li>\r\n \t<li data-start=\"1913\" data-end=\"1967\">\r\n<p data-start=\"1915\" data-end=\"1967\">Control panels in industrial environments (Type 2)<\/p>\r\n<\/li>\r\n \t<li data-start=\"1968\" data-end=\"2053\">\r\n<p data-start=\"1970\" data-end=\"2053\">Point-of-use or socket-level protection for sensitive AC-powered devices (Type 3)<\/p>\r\n<\/li>\r\n<\/ul>\r\n<h3 data-start=\"2055\" data-end=\"2094\">Example from <span style=\"text-decoration: underline;\"><a href=\"https:\/\/www.britecelectric.com\/product-category\/ac-power-surge-protection\/\" target=\"_blank\" rel=\"noopener\"><strong><em>Britec AC SPD Product<\/em><\/strong><\/a> <\/span>Range<\/h3>\r\n<ul data-start=\"2095\" data-end=\"2701\">\r\n \t<li data-start=\"2095\" data-end=\"2257\">\r\n<p data-start=\"2097\" data-end=\"2257\"><strong data-start=\"2097\" data-end=\"2117\">BR-50GR (Type 1)<\/strong>: Rated for Uc 275\/320\/440 V, with Iimp up to 25 kA (10\/350 \u00b5s); ideal for service entrance lightning protection in TN\/TT systems.<\/p>\r\n<\/li>\r\n \t<li data-start=\"2258\" data-end=\"2392\">\r\n<p data-start=\"2260\" data-end=\"2392\"><strong data-start=\"2260\" data-end=\"2290\">BR-12.5M (Type 1+2 hybrid)<\/strong>: Handles both lightning impulse and switching surges, making it suitable for industrial facilities.<\/p>\r\n<\/li>\r\n \t<li data-start=\"2393\" data-end=\"2583\">\r\n<p data-start=\"2395\" data-end=\"2583\"><strong data-start=\"2395\" data-end=\"2425\">BR-40 and BR-30FU (Type 2)<\/strong>: Rated for Uc 275 V, with In 20 kA \/ Imax 40 kA (8\/20 \u00b5s); the BR-30FU integrates a backup fuse, simplifying installation and improving safety.<\/p>\r\n<\/li>\r\n \t<li data-start=\"2584\" data-end=\"2701\">\r\n<p data-start=\"2586\" data-end=\"2701\"><strong data-start=\"2586\" data-end=\"2613\">BR-230\/BR275-6 (Type 3)<\/strong>: Designed for terminal equipment protection, with low residual voltage (Up \u2264 1.5 kV).<\/p>\r\n<\/li>\r\n<\/ul>\r\n<\/blockquote>\r\n<h2>3. What Is DC Surge Protection?<\/h2>\r\n<a href=\"https:\/\/www.britecelectric.com\/product-category\/dc-surge-protector\/\" rel=\"attachment wp-att-2113\"><img class=\"alignnone wp-image-2113\" src=\"https:\/\/www.britecelectric.com\/wp-content\/uploads\/2025\/06\/Surge-Protection-Devices-For-Solar-PV-1024x1024.webp\" alt=\"DC Surge Protection Devices\" width=\"600\" height=\"600\" \/><\/a>\r\n\r\n<em><a href=\"https:\/\/www.britecelectric.com\/product-category\/dc-surge-protector\/\" target=\"_blank\" rel=\"noopener\"><strong data-start=\"361\" data-end=\"384\">DC surge protection<\/strong><\/a><\/em> is designed for direct current systems, where electricity flows in a single direction without natural zero-crossings. Unlike AC systems that benefit from periodic voltage reversals, DC systems present a unique engineering challenge: arcs do not self-extinguish. This means that DC SPDs require more robust arc quenching, thermal disconnection, and mechanical release mechanisms to ensure safety and prevent thermal runaway.\r\n<h3 data-start=\"820\" data-end=\"849\">Key Features of DC SPDs<\/h3>\r\n<ul data-start=\"850\" data-end=\"1855\">\r\n \t<li data-start=\"850\" data-end=\"1011\">\r\n<p data-start=\"852\" data-end=\"1011\"><strong data-start=\"852\" data-end=\"871\">Voltage Ratings<\/strong>: Typically designed for 500 Vdc to 1500 Vdc, covering solar PV arrays, battery storage systems (BESS), and DC fast-charging networks.<\/p>\r\n<\/li>\r\n \t<li data-start=\"1012\" data-end=\"1174\">\r\n<p data-start=\"1014\" data-end=\"1174\"><strong data-start=\"1014\" data-end=\"1047\">Unidirectional MOV selection<\/strong>: To accommodate DC polarity, DC SPDs use unidirectional MOVs, ensuring correct surge clamping for one-way current flow.<\/p>\r\n<\/li>\r\n \t<li data-start=\"1175\" data-end=\"1364\">\r\n<p data-start=\"1177\" data-end=\"1364\"><strong data-start=\"1177\" data-end=\"1196\">Arc Suppression<\/strong>: Because DC lacks a zero-crossing, DC SPDs integrate fast-acting thermal disconnects, gas discharge tubes (GDTs), or arc chambers to safely break fault currents.<\/p>\r\n<\/li>\r\n \t<li data-start=\"1365\" data-end=\"1538\">\r\n<p data-start=\"1367\" data-end=\"1538\"><strong data-start=\"1367\" data-end=\"1390\">High Surge Handling<\/strong>: Built to absorb high-energy surges with In\/Imax ratings up to 20\u201340 kA (8\/20 \u00b5s) and Type 1+2 devices rated for Iimp lightning impulses.<\/p>\r\n<\/li>\r\n \t<li data-start=\"1539\" data-end=\"1855\">\r\n<p data-start=\"1541\" data-end=\"1576\"><strong data-start=\"1541\" data-end=\"1573\">Compliance and Certification<\/strong>:<\/p>\r\n\r\n<ul data-start=\"1579\" data-end=\"1855\">\r\n \t<li data-start=\"1579\" data-end=\"1699\">\r\n<p data-start=\"1581\" data-end=\"1699\">Must comply with IEC 61643-31 (for PV DC SPDs) or <a href=\"https:\/\/www.nemasurge.org\/ul-1449-transient-voltage-surge-suppressors\/\" target=\"_blank\" rel=\"noopener\"><strong data-start=\"1635\" data-end=\"1646\">UL 1449<\/strong><\/a> (for DC systems in North America, up to 1500 Vdc).<\/p>\r\n<\/li>\r\n \t<li data-start=\"1702\" data-end=\"1855\">\r\n<p data-start=\"1704\" data-end=\"1855\">Depending on project or regional requirements, products may carry additional T\u00dcV, CB, or UL certifications for grid compliance and safety audits.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<h3 data-start=\"1857\" data-end=\"1906\">Typical Applications of DC Surge Protection<\/h3>\r\n<ul data-start=\"1907\" data-end=\"2261\">\r\n \t<li data-start=\"1907\" data-end=\"1999\">\r\n<p data-start=\"1909\" data-end=\"1999\">Solar PV arrays (string or combiner box protection, typically 1000 Vdc or 1500 Vdc).<\/p>\r\n<\/li>\r\n \t<li data-start=\"2000\" data-end=\"2084\">\r\n<p data-start=\"2002\" data-end=\"2084\">Battery Energy Storage Systems (BESS) for grid-scale or microgrid solutions.<\/p>\r\n<\/li>\r\n \t<li data-start=\"2085\" data-end=\"2162\">\r\n<p data-start=\"2087\" data-end=\"2162\">Electric Vehicle (EV) charging stations, especially DC fast charging.<\/p>\r\n<\/li>\r\n \t<li data-start=\"2163\" data-end=\"2261\">\r\n<p data-start=\"2165\" data-end=\"2261\">Telecom towers and renewable energy systems (wind turbine converters, hybrid DC networks).<\/p>\r\n<\/li>\r\n<\/ul>\r\n<h3 data-start=\"2263\" data-end=\"2304\">Examples from <span style=\"text-decoration: underline;\"><a href=\"https:\/\/www.britecelectric.com\/product-category\/dc-surge-protector\/\" target=\"_blank\" rel=\"noopener\">Britec\u2019s DC SPD<\/a><\/span> Range<\/h3>\r\n<ul data-start=\"2305\" data-end=\"2976\">\r\n \t<li data-start=\"2305\" data-end=\"2630\">\r\n<p data-start=\"2307\" data-end=\"2341\"><a href=\"https:\/\/www.britecelectric.com\/product\/brpv3-1000-20-1000v-20ka-t12-pv-surge-arrester\/\" target=\"_blank\" rel=\"noopener\"><em><strong data-start=\"2307\" data-end=\"2339\">BRPV3-1000 (Type 1+2 DC SPD)<\/strong><\/em><\/a><\/p>\r\n\r\n<ul data-start=\"2344\" data-end=\"2630\">\r\n \t<li data-start=\"2344\" data-end=\"2381\">\r\n<p data-start=\"2346\" data-end=\"2381\">Voltage rating: Uc = 1000 Vdc<\/p>\r\n<\/li>\r\n \t<li data-start=\"2384\" data-end=\"2429\">\r\n<p data-start=\"2386\" data-end=\"2429\">Nominal discharge current: In = 20 kA<\/p>\r\n<\/li>\r\n \t<li data-start=\"2432\" data-end=\"2489\">\r\n<p data-start=\"2434\" data-end=\"2489\">Maximum discharge current: Imax = 40 kA (8\/20 \u00b5s)<\/p>\r\n<\/li>\r\n \t<li data-start=\"2492\" data-end=\"2537\">\r\n<p data-start=\"2494\" data-end=\"2537\">Voltage protection level: Up \u2264 3.8 kV<\/p>\r\n<\/li>\r\n \t<li data-start=\"2540\" data-end=\"2630\">\r\n<p data-start=\"2542\" data-end=\"2630\">Features: Thermal disconnector + remote signaling for real-time monitoring.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<\/li>\r\n \t<li data-start=\"2632\" data-end=\"2976\">\r\n<p data-start=\"2634\" data-end=\"2668\"><a href=\"https:\/\/www.britecelectric.com\/product\/brpv3-1500-12-5-t1t2-1500v-12-5ka-pv-surge-protection-device\/\" target=\"_blank\" rel=\"noopener\"><strong data-start=\"2634\" data-end=\"2666\">BRPV3-1500 (Type 1+2 DC SPD)<\/strong><\/a><\/p>\r\n\r\n<ul data-start=\"2671\" data-end=\"2976\">\r\n \t<li data-start=\"2671\" data-end=\"2708\">\r\n<p data-start=\"2673\" data-end=\"2708\">Voltage rating: Uc = 1500 Vdc<\/p>\r\n<\/li>\r\n \t<li data-start=\"2711\" data-end=\"2756\">\r\n<p data-start=\"2713\" data-end=\"2756\">Nominal discharge current: In = 20 kA<\/p>\r\n<\/li>\r\n \t<li data-start=\"2759\" data-end=\"2806\">\r\n<p data-start=\"2761\" data-end=\"2806\">Maximum discharge current: Imax = 40 kA<\/p>\r\n<\/li>\r\n \t<li data-start=\"2809\" data-end=\"2854\">\r\n<p data-start=\"2811\" data-end=\"2854\">Voltage protection level: Up \u2264 4.5 kV<\/p>\r\n<\/li>\r\n \t<li data-start=\"2857\" data-end=\"2976\">\r\n<p data-start=\"2859\" data-end=\"2976\">Features: Arc chamber design + thermal cut-off, ensuring reliable operation in PV plants and EV infrastructure.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<h2>4. What\u2019s the Difference Between AC and DC Surge Protection?<\/h2>\r\nAlthough AC SPDs and DC SPDs look similar at first glance, their design principles, standards, and application requirements are very different. The table below summarizes the key differences between AC SPD and DC SPD:\r\n<table style=\"width: 100%; height: 336px;\">\r\n<thead>\r\n<tr style=\"height: 24px;\">\r\n<th style=\"height: 24px;\"><strong>Parameter<\/strong><\/th>\r\n<th style=\"height: 24px;\"><strong>AC SPD<\/strong><\/th>\r\n<th style=\"height: 24px;\"><strong>DC SPD<\/strong><\/th>\r\n<\/tr>\r\n<\/thead>\r\n<tbody>\r\n<tr style=\"height: 48px;\">\r\n<td style=\"height: 48px;\"><strong>Voltage Range<\/strong><\/td>\r\n<td style=\"height: 48px;\">115V \u2013 690V AC (common grids) Example: BR-40 (Uc 275 V, In 20 kA)<\/td>\r\n<td style=\"height: 48px;\">500V \u2013 1500V DC (PV, EV, BESS) Example: BRPV3-1500 (Uc 1500 Vdc, In 20 kA)<\/td>\r\n<\/tr>\r\n<tr style=\"height: 24px;\">\r\n<td style=\"height: 24px;\"><strong>Polarity Handling<\/strong><\/td>\r\n<td style=\"height: 24px;\">Bi-directional operation (AC sine wave polarity switching)<\/td>\r\n<td style=\"height: 24px;\">Unidirectional MOV selection for DC polarity stability<\/td>\r\n<\/tr>\r\n<tr style=\"height: 48px;\">\r\n<td style=\"height: 48px;\"><strong>Arc Extinguishing<\/strong><\/td>\r\n<td style=\"height: 48px;\">Natural zero-crossing aids arc interruption Type 1 SPDs often use MOV + GDT\/arc chamber for 10\/350 \u00b5s impulses<\/td>\r\n<td style=\"height: 48px;\">No zero-crossing \u2192 requires fast thermal disconnector, arc chamber, or GDT<\/td>\r\n<\/tr>\r\n<tr style=\"height: 24px;\">\r\n<td style=\"height: 24px;\"><strong>Response Time<\/strong><\/td>\r\n<td style=\"height: 24px;\">MOV-based SPDs typically respond in &lt;25 ns (device-dependent)<\/td>\r\n<td style=\"height: 24px;\">Same principle \u2013 MOV-based, &lt;25 ns (device-dependent)<\/td>\r\n<\/tr>\r\n<tr style=\"height: 24px;\">\r\n<td style=\"height: 24px;\"><strong>Waveform Type<\/strong><\/td>\r\n<td style=\"height: 24px;\">Sinusoidal (50\/60 Hz)<\/td>\r\n<td style=\"height: 24px;\">Constant DC voltage<\/td>\r\n<\/tr>\r\n<tr style=\"height: 48px;\">\r\n<td style=\"height: 48px;\"><strong>Surge Test Waveforms<\/strong><\/td>\r\n<td style=\"height: 48px;\">8\/20 \u00b5s (switching), 10\/350 \u00b5s (lightning current, Type 1)<\/td>\r\n<td style=\"height: 48px;\">Standardized same as AC (8\/20 \u00b5s, 10\/350 \u00b5s); key difference = arc extinction<\/td>\r\n<\/tr>\r\n<tr style=\"height: 48px;\">\r\n<td style=\"height: 48px;\"><strong>Energy Handling<\/strong><\/td>\r\n<td style=\"height: 48px;\">Per-pole rating depends on design (check datasheet: In\/Imax\/Iimp) Example: <strong>BR-30FU (In 20 kA, Imax 40 kA)<\/strong><\/td>\r\n<td style=\"height: 48px;\">Per-pole rating depends on design (In\/Imax\/Iimp) Example: BRPV3-1000 (In 20 kA, Imax 40 kA)<\/td>\r\n<\/tr>\r\n<tr style=\"height: 24px;\">\r\n<td style=\"height: 24px;\"><strong>Standards<\/strong><\/td>\r\n<td style=\"height: 24px;\">IEC 61643-11 (AC SPDs), UL 1449 (North America)<\/td>\r\n<td style=\"height: 24px;\">IEC 61643-31 (DC SPDs, PV), UL 1449 (North America, PV \u22641500 Vdc)<\/td>\r\n<\/tr>\r\n<tr style=\"height: 24px;\">\r\n<td style=\"height: 24px;\"><strong>Applications<\/strong><\/td>\r\n<td style=\"height: 24px;\">Homes, offices, industrial control panels, building distribution boards<\/td>\r\n<td style=\"height: 24px;\">Solar PV arrays, battery storage, EV charging, telecom, wind turbines<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<h3>4.1 Electrical Current Characteristics: AC vs. DC<\/h3>\r\nAC reverses direction periodically (sine wave), allowing natural zero-crossing points. DC flows in a single direction continuously (flat waveform), making arc extinguishing much more challenging.\r\n\r\n<strong>Implication:<\/strong>\r\n<blockquote>AC SPDs benefit from zero-crossing for arc interruption, while DC SPDs require more robust arc suppression mechanisms due to waveform characteristics.<\/blockquote>\r\n<h3>4.2 Surge Waveform<\/h3>\r\n<ul data-spread=\"false\">\r\n \t<li>AC surges often have smoother, sinusoidal waveforms.<\/li>\r\n \t<li>DC surges are shorter, faster, and more abrupt with flat top voltage<\/li>\r\n<\/ul>\r\n<strong>Response Time Needs:<\/strong>\r\n<blockquote>DC SPDs typically require faster response times (\u226425ns) to protect against rapid transients.<\/blockquote>\r\n<h3>4.3 Design and Operating Principles of SPDs<\/h3>\r\n<ul data-spread=\"false\">\r\n \t<li><strong>AC SPD:<\/strong> Designed for symmetrical voltage polarity and sine wave input<\/li>\r\n \t<li><strong>DC SPD:<\/strong> Built for polarity-sensitive circuits and unidirectional current flow<\/li>\r\n<\/ul>\r\n<strong>Technology Used: <\/strong>Both AC and DC SPD devices commonly use MOVs (metal oxide varistors), thermal disconnects, and sometimes GDTs (gas discharge tubes). To understand how these components function inside a surge protection device, see our detailed guide on <strong><em><a href=\"https:\/\/www.britecelectric.com\/blog\/how-does-spd-surge-protection-device-work\/\" target=\"_blank\" rel=\"noopener\">how an SPD works<\/a>.<\/em><\/strong>\r\n<h3>4.4 Voltage Ratings and Surge Capacity<\/h3>\r\n<ul data-spread=\"false\">\r\n \t<li>AC SPDs: Range from 115V to 600V<\/li>\r\n \t<li>DC SPDs: Range from 500V to 1500V<\/li>\r\n<\/ul>\r\n<strong>Example:<\/strong>\r\n<blockquote>DC SPD FLY1-40PV handles up to 40kA; AC SPD USP2 ranges up to 120kA, depending on the model.<\/blockquote>\r\n<h3>4.5 Application Environments<\/h3>\r\n<ul data-spread=\"false\">\r\n \t<li><strong>AC SPD:<\/strong> Offices, homes, HVAC, control panels<\/li>\r\n \t<li><strong>DC SPD:<\/strong> Renewable energy, outdoor telecom, transportation systems<\/li>\r\n<\/ul>\r\n<strong>Environmental Tolerance:<\/strong>\r\n<blockquote>DC SPDs usually support wider temperature ranges and relative humidity due to outdoor applications.<\/blockquote>\r\n<h3>4.6 Arc Extinguishing<\/h3>\r\n<ul data-spread=\"false\">\r\n \t<li><strong>AC:<\/strong> Arc naturally extinguishes at the zero-crossing<\/li>\r\n \t<li><strong>DC:<\/strong> Requires mechanical\/thermal arc quenching due to lack of polarity reversal.<\/li>\r\n<\/ul>\r\n<strong>Why It Matters:<\/strong>\r\n<blockquote>Inadequate arc suppression in DC surge arresters can lead to thermal runaway and fire.<\/blockquote>\r\n<h3>4.7 Standards, Testing, and Certification<\/h3>\r\n<ul data-spread=\"false\">\r\n \t<li><strong>AC SPD Standards:<\/strong> UL 1449, IEC 61643-11 (Type 1, 2, 3)<\/li>\r\n \t<li><strong>DC SPD Standards:<\/strong> EN 50539-11, IEC 61643-31, UL 1449 (PV, BESS, EV focus)<\/li>\r\n<\/ul>\r\n<strong>Example:<\/strong>\r\n<blockquote>Surge protection class must be verified via TUV-certified SPD labels for grid compliance.<\/blockquote>\r\n<h2>5. How to Choose the Right SPD<\/h2>\r\n<p data-start=\"408\" data-end=\"648\">Selecting the correct Surge Protective Device (SPD) is not only about voltage rating \u2013 it also involves installation position, protection coordination, and compliance with international standards. Here are the key factors to consider:<\/p>\r\n\r\n<h3 data-start=\"655\" data-end=\"700\">1. Match the SPD to Your System Voltage<\/h3>\r\n<ul data-start=\"701\" data-end=\"1201\">\r\n \t<li data-start=\"701\" data-end=\"930\">\r\n<p data-start=\"703\" data-end=\"744\"><strong data-start=\"703\" data-end=\"742\">AC systems (IEC 61643-11 \/ UL 1449)<\/strong><\/p>\r\n\r\n<ul data-start=\"747\" data-end=\"930\">\r\n \t<li data-start=\"747\" data-end=\"803\">\r\n<p data-start=\"749\" data-end=\"803\">230\/400 V (TN\/TT grids): Choose <strong data-start=\"781\" data-end=\"793\">Uc 275 V<\/strong> models.<\/p>\r\n<\/li>\r\n \t<li data-start=\"806\" data-end=\"930\">\r\n<p data-start=\"808\" data-end=\"930\">Example: Britec BR-40\/30FU \u2013 Type 2 SPD, Uc 275 V, In 20 kA, Imax 40 kA, with integrated fuse for backup protection.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<\/li>\r\n \t<li data-start=\"931\" data-end=\"1201\">\r\n<p data-start=\"933\" data-end=\"987\"><strong data-start=\"933\" data-end=\"985\">PV DC systems (IEC 61643-31 \/ UL 1449 \u22641500 Vdc)<\/strong><\/p>\r\n\r\n<ul data-start=\"990\" data-end=\"1201\">\r\n \t<li data-start=\"990\" data-end=\"1062\">\r\n<p data-start=\"992\" data-end=\"1062\">600 Vdc, 1000 Vdc, or 1500 Vdc arrays: Select matching DC Uc rating.<\/p>\r\n<\/li>\r\n \t<li data-start=\"1065\" data-end=\"1201\">\r\n<p data-start=\"1067\" data-end=\"1201\">Example: <strong data-start=\"1076\" data-end=\"1111\">Britec BRPV3-1000 (Uc 1000 Vdc)<\/strong> or <strong data-start=\"1115\" data-end=\"1143\">BRPV3-1500 (Uc 1500 Vdc)<\/strong> \u2013 Type 1+2 DC SPDs for PV combiner boxes and inverters.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<p data-start=\"1203\" data-end=\"1342\"><strong data-start=\"1205\" data-end=\"1212\">Tip<\/strong>: Always check that the SPD\u2019s Uc (continuous operating voltage) is \u2265 1.2 \u00d7 nominal system voltage to avoid premature ageing.<\/p>\r\n\r\n<h3 data-start=\"1349\" data-end=\"1424\">2. Apply the Right Protection Class (Type) to Each Installation Level<\/h3>\r\n<ul data-start=\"1425\" data-end=\"2052\">\r\n \t<li data-start=\"1425\" data-end=\"1627\">\r\n<p data-start=\"1427\" data-end=\"1469\">Type 1 (10\/350 \u00b5s lightning current)<\/p>\r\n\r\n<ul data-start=\"1472\" data-end=\"1627\">\r\n \t<li data-start=\"1472\" data-end=\"1530\">\r\n<p data-start=\"1474\" data-end=\"1530\">Installed at service entrance \/ main distribution.<\/p>\r\n<\/li>\r\n \t<li data-start=\"1533\" data-end=\"1571\">\r\n<p data-start=\"1535\" data-end=\"1571\">Handles direct lightning currents.<\/p>\r\n<\/li>\r\n \t<li data-start=\"1574\" data-end=\"1627\">\r\n<p data-start=\"1576\" data-end=\"1627\">Example: <strong data-start=\"1585\" data-end=\"1610\">BR-12.5M Type 1+2 SPD<\/strong>, Iimp 12.5 kA.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<\/li>\r\n \t<li data-start=\"1628\" data-end=\"1865\">\r\n<p data-start=\"1630\" data-end=\"1669\">Type 2 (8\/20 \u00b5s switching surges)<\/p>\r\n\r\n<ul data-start=\"1672\" data-end=\"1865\">\r\n \t<li data-start=\"1672\" data-end=\"1719\">\r\n<p data-start=\"1674\" data-end=\"1719\">Installed at floor distribution boards.<\/p>\r\n<\/li>\r\n \t<li data-start=\"1722\" data-end=\"1792\">\r\n<p data-start=\"1724\" data-end=\"1792\">Protects against switching surges and residual lightning currents.<\/p>\r\n<\/li>\r\n \t<li data-start=\"1795\" data-end=\"1865\">\r\n<p data-start=\"1797\" data-end=\"1865\">Example: <strong data-start=\"1806\" data-end=\"1831\">BR-40\/30FU Type 2 SPD<\/strong> (with integrated disconnector).<\/p>\r\n<\/li>\r\n<\/ul>\r\n<\/li>\r\n \t<li data-start=\"1866\" data-end=\"2052\">\r\n<p data-start=\"1868\" data-end=\"1895\">Type 3 (point-of-use)<\/p>\r\n\r\n<ul data-start=\"1898\" data-end=\"2052\">\r\n \t<li data-start=\"1898\" data-end=\"1983\">\r\n<p data-start=\"1900\" data-end=\"1983\">Installed close to sensitive equipment (computers, servers, medical devices).<\/p>\r\n<\/li>\r\n \t<li data-start=\"1986\" data-end=\"2052\">\r\n<p data-start=\"1988\" data-end=\"2052\">Protects against residual surges not clamped by upstream SPDs.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<p data-start=\"2054\" data-end=\"2204\"><strong data-start=\"2056\" data-end=\"2076\">Engineering rule<\/strong>: If the cable length between two protection stages is <strong data-start=\"2131\" data-end=\"2140\">&gt;<\/strong>10 m, install additional SPDs at both ends to ensure coordination.<\/p>\r\n\r\n<h3 data-start=\"2211\" data-end=\"2261\">3. Ensure Coordination With Breakers &amp; Fuses<\/h3>\r\n<ul data-start=\"2262\" data-end=\"2455\">\r\n \t<li data-start=\"2262\" data-end=\"2330\">\r\n<p data-start=\"2264\" data-end=\"2330\">SPDs must be coordinated with upstream MCB\/RCB\/backup fuses.<\/p>\r\n<\/li>\r\n \t<li data-start=\"2331\" data-end=\"2455\">\r\n<p data-start=\"2333\" data-end=\"2455\">Some models, like <strong data-start=\"2351\" data-end=\"2372\">Britec BR-40\/30FU<\/strong>, integrate thermal disconnectors and backup protection, reducing space and cost.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<h3 data-start=\"2462\" data-end=\"2496\">4. Compliance With Standards<\/h3>\r\n<ul data-start=\"2497\" data-end=\"2605\">\r\n \t<li data-start=\"2497\" data-end=\"2543\">\r\n<p data-start=\"2499\" data-end=\"2543\"><strong data-start=\"2499\" data-end=\"2510\">AC SPDs<\/strong>: IEC 61643-11, UL 1449<\/p>\r\n<\/li>\r\n \t<li data-start=\"2544\" data-end=\"2605\">\r\n<p data-start=\"2546\" data-end=\"2605\"><strong data-start=\"2546\" data-end=\"2560\">PV DC SPDs<\/strong>: IEC 61643-31, UL 1449 (\u22641500 Vdc)<\/p>\r\n<\/li>\r\n<\/ul>\r\n<p data-start=\"2607\" data-end=\"2731\">Always ensure the SPD carries the proper CE, UL, or IEC test certifications, especially for international projects.<\/p>\r\n\r\n<h3 data-start=\"2738\" data-end=\"2756\">Key Takeaway<\/h3>\r\n<p data-start=\"2757\" data-end=\"2931\">Choosing the right SPD means matching the voltage, selecting the correct Type per installation level, ensuring proper coordination, and complying with IEC\/UL standards.<\/p>\r\n<p data-start=\"2933\" data-end=\"3142\">With <strong data-start=\"2938\" data-end=\"3007\">Britec\u2019s portfolio (BR-12.5M, BR-40\/30FU, BRPV3-1000, BRPV3-1500)<\/strong>, you can cover residential, commercial, industrial, and PV solar applications with certified, high-performance surge protection.<\/p>\r\n\r\n<h2>6. Conclusion<\/h2>\r\nAC and DC surge protection devices may look similar, but they serve fundamentally different systems. AC SPDs are optimized for sine wave applications in buildings and grids. DC SPDs are tailored for flat voltage waveforms in renewable and high-voltage DC infrastructures.\r\n\r\n<strong>Choosing the correct SPD is essential to safeguarding equipment and maintaining compliance with safety standards.<\/strong>\r\n\r\nTo ensure optimal protection:\r\n<ul data-spread=\"false\">\r\n \t<li>Always match the SPD type to the current system (AC or DC)<\/li>\r\n \t<li>Consider voltage rating, waveform characteristics, and required energy absorption capability.<\/li>\r\n \t<li>Choose certified products (TUV, UL, CE) with appropriate surge protection class ratings.<\/li>\r\n<\/ul>\r\n<a href=\"https:\/\/www.britecelectric.com\/contact-us\/\" target=\"_blank\" rel=\"noopener\"><strong>Need help selecting your SPD?<\/strong> Contact a certified electrical professional or surge protection provider to find the right DC surge protection or AC surge protection solution for your system.<\/a>"},"_links":{"self":[{"href":"https:\/\/www.britecelectric.com\/hu\/wp-json\/wp\/v2\/blog\/2112","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.britecelectric.com\/hu\/wp-json\/wp\/v2\/blog"}],"about":[{"href":"https:\/\/www.britecelectric.com\/hu\/wp-json\/wp\/v2\/types\/blog"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.britecelectric.com\/hu\/wp-json\/wp\/v2\/media\/2114"}],"wp:attachment":[{"href":"https:\/\/www.britecelectric.com\/hu\/wp-json\/wp\/v2\/media?parent=2112"}],"wp:term":[{"taxonomy":"blog_category","embeddable":true,"href":"https:\/\/www.britecelectric.com\/hu\/wp-json\/wp\/v2\/blog_category?post=2112"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}