{"id":2154,"date":"2025-08-13T17:13:07","date_gmt":"2025-08-13T09:13:07","guid":{"rendered":"https:\/\/www.britecelectric.com\/?post_type=blog&#038;p=2154"},"modified":"2025-08-13T17:13:07","modified_gmt":"2025-08-13T09:13:07","slug":"what-is-a-type-2-surge-protection-device","status":"publish","type":"blog","link":"https:\/\/www.britecelectric.com\/pl\/blog\/what-is-a-type-2-surge-protection-device\/","title":{"rendered":"Co to jest urz\u0105dzenie przeciwprzepi\u0119ciowe typu 2?"},"content":{"rendered":"<h2 data-start=\"226\" data-end=\"241\">Wst\u0119p<\/h2>\r\n<p data-start=\"243\" data-end=\"597\">A <a href=\"https:\/\/www.britecelectric.com\/pl\/product-category\/ac-power-surge-protection\/type-2-surge-protective-device\/\"><strong data-start=\"245\" data-end=\"279\">Urz\u0105dzenie przeciwprzepi\u0119ciowe typu 2<\/strong><\/a> (SPD typu 2) stanowi podstaw\u0119 ochrony przeciwprzepi\u0119ciowej w nowoczesnych systemach elektrycznych. Zainstalowany na g\u0142\u00f3wnej tablicy rozdzielczej lub szafie sterowniczej, dzia\u0142a jako drugi ekran w warstwowej strategii obrony \u2014 wychwytuje resztkowe przepi\u0119cia pozostawione przez poprzedzaj\u0105ce urz\u0105dzenia SPD typu 1 i t\u0142umi stany nieustalone generowane wewn\u0105trz sieci.<\/p>\r\n<p data-start=\"599\" data-end=\"986\">Urz\u0105dzenia te chroni\u0105 przed pr\u0105dami impulsowymi 8\/20 \u03bcs, kt\u00f3re powstaj\u0105 w wyniku przepi\u0119\u0107 wywo\u0142anych piorunami, zdarze\u0144 prze\u0142\u0105czania lub zak\u0142\u00f3ce\u0144 w sieci.<\/p>\r\nAby zapewni\u0107 niezawodn\u0105, \u200b\u200bd\u0142ugoterminow\u0105 ochron\u0119, in\u017cynierowie i nabywcy techniczni musz\u0105 zrozumie\u0107 kilka kluczowych aspekt\u00f3w SPD typu 2:\r\n<ul>\r\n \t<li><b>Definicja:<\/b> Co to jest?<\/li>\r\n \t<li><b>Jak to dzia\u0142a:<\/b> Jego zasady dzia\u0142ania.<\/li>\r\n \t<li><b>Standardy:<\/b> Jakie przepisy spe\u0142nia?<\/li>\r\n \t<li><b>Instalacja i wyb\u00f3r:<\/b> Zasady prawid\u0142owego wyboru i monta\u017cu.<\/li>\r\n<\/ul>\r\n<h2 data-start=\"993\" data-end=\"1042\">Definicja urz\u0105dzenia przeciwprzepi\u0119ciowego typu 2<\/h2>\r\n<p data-start=\"1044\" data-end=\"1268\">Wed\u0142ug <a href=\"https:\/\/webstore.iec.ch\/en\/publication\/65314\" target=\"_blank\" rel=\"noopener\"><em><strong>Norma IEC\/EN 61643-11<\/strong><\/em><\/a>, **SPD typu 2** jest urz\u0105dzeniem klasy II. Przeznaczony jest do lokalizacji, w kt\u00f3rych nie wyst\u0119puj\u0105 bezpo\u015brednie uderzenia pioruna. Jednak\u017ce lokalizacje te w dalszym ci\u0105gu s\u0105 nara\u017cone na ryzyko wyst\u0119powania silnych przepi\u0119\u0107 przej\u015bciowych.<\/p>\r\n<p data-start=\"1270\" data-end=\"1290\">Kluczowe cechy:<\/p>\r\n\r\n<ul data-start=\"1291\" data-end=\"1618\">\r\n \t<li data-start=\"1291\" data-end=\"1335\">\r\n<p data-start=\"1293\" data-end=\"1335\">Testowane przy u\u017cyciu przebieg\u00f3w pr\u0105du 8\/20 \u03bcs.<\/p>\r\n<\/li>\r\n \t<li data-start=\"1336\" data-end=\"1466\">\r\n<p data-start=\"1338\" data-end=\"1466\">Typowy nominalny pr\u0105d wy\u0142adowczy (In) mie\u015bci si\u0119 w zakresie 5\u201320 kA, a maksymalny pr\u0105d wy\u0142adowczy (Imax) wynosi do 40\u201380 kA.<\/p>\r\n<\/li>\r\n \t<li data-start=\"1467\" data-end=\"1530\">\r\n<p data-start=\"1469\" data-end=\"1530\">Montowany po stronie obci\u0105\u017cenia elektrycznego panelu serwisowego.<\/p>\r\n<\/li>\r\n \t<li data-start=\"1531\" data-end=\"1618\">\r\n<p data-start=\"1533\" data-end=\"1618\">Chroni zar\u00f3wno przed zewn\u0119trznymi przepi\u0119ciami resztkowymi, jak i wewn\u0119trznymi przepi\u0119ciami prze\u0142\u0105czaj\u0105cymi.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<p data-start=\"1620\" data-end=\"1802\">W praktyce SPD typu 2 znajduje si\u0119 za urz\u0105dzeniem typu 1 i przed jakimkolwiek zabezpieczeniem punktu poboru typu 3, tworz\u0105c cz\u0119\u015b\u0107 wielostopniowego systemu ochrony przed przepi\u0119ciami.<\/p>\r\n<p data-start=\"1620\" data-end=\"1802\"><a href=\"https:\/\/www.britecelectric.com\/pl\/product-category\/ac-power-surge-protection\/type-2-surge-protective-device\/\" target=\"_blank\" rel=\"noopener\"><img class=\"alignnone  wp-image-2160\" src=\"https:\/\/www.britecelectric.com\/wp-content\/uploads\/2025\/08\/BR-20-4P-1Type-2-Surge-Protection-Device.jpg-1024x1024.webp\" alt=\"\" width=\"900\" height=\"900\" \/><\/a><\/p>\r\n\r\n<h2 data-start=\"1809\" data-end=\"1859\">Jak to si\u0119 dzieje, \u017ce A <a href=\"https:\/\/www.britecelectric.com\/pl\/product-category\/ac-power-surge-protection\/type-2-surge-protective-device\/\" target=\"_blank\" rel=\"noopener\">Urz\u0105dzenie przeciwprzepi\u0119ciowe typu 2<\/a> praca?<\/h2>\r\n<p data-start=\"1861\" data-end=\"2143\">SPD typu 2 dzia\u0142a na zasadzie zaciskania napi\u0119cia. Przy normalnym napi\u0119ciu pozostaje pasywny. Kiedy przej\u015bciowy udar przekracza maksymalne ci\u0105g\u0142e napi\u0119cie robocze (Uc), jego wewn\u0119trzne elementy szybko prze\u0142\u0105czaj\u0105 si\u0119 w stan przewodz\u0105cy, odprowadzaj\u0105c nadmiar energii do masy.<\/p>\r\n<p data-start=\"2145\" data-end=\"2176\"><strong data-start=\"2145\" data-end=\"2176\">Typowe komponenty obejmuj\u0105:<\/strong><\/p>\r\n\r\n<ul data-start=\"2177\" data-end=\"2557\">\r\n \t<li data-start=\"2177\" data-end=\"2285\">\r\n<p data-start=\"2179\" data-end=\"2285\"><strong data-start=\"2179\" data-end=\"2210\">MOV (warystor tlenku metalu):<\/strong> Podstawowy element zaciskowy, poch\u0142aniaj\u0105cy energi\u0119 udarow\u0105 i redukuj\u0105cy napi\u0119cie.<\/p>\r\n<\/li>\r\n \t<li data-start=\"2286\" data-end=\"2385\">\r\n<p data-start=\"2288\" data-end=\"2385\"><strong data-start=\"2288\" data-end=\"2320\">Obwody hybrydowe (MOV + GDT):<\/strong> Po\u0142\u0105cz wysok\u0105 zdolno\u015b\u0107 udarow\u0105 z ulepszon\u0105 d\u0142ugoterminow\u0105 niezawodno\u015bci\u0105.<\/p>\r\n<\/li>\r\n \t<li data-start=\"2386\" data-end=\"2470\">\r\n<p data-start=\"2388\" data-end=\"2470\"><strong data-start=\"2388\" data-end=\"2418\">System od\u0142\u0105czania termicznego:<\/strong> Izoluje SPD pod koniec okresu eksploatacji, aby zachowa\u0107 bezpiecze\u0144stwo.<\/p>\r\n<\/li>\r\n \t<li data-start=\"2471\" data-end=\"2557\">\r\n<p data-start=\"2473\" data-end=\"2557\"><strong data-start=\"2473\" data-end=\"2494\">Wska\u017anik stanu:<\/strong> Okno wizualne lub wyj\u015bcie stykowe pokazuj\u0105ce stan operacyjny.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<p data-start=\"2559\" data-end=\"2582\"><strong data-start=\"2559\" data-end=\"2582\">Sekwencja operacji:<\/strong><\/p>\r\n\r\n<ol data-start=\"2583\" data-end=\"2882\">\r\n \t<li data-start=\"2583\" data-end=\"2645\">\r\n<p data-start=\"2586\" data-end=\"2645\"><strong data-start=\"2586\" data-end=\"2602\">Tryb normalny:<\/strong> Wysoka rezystancja, brak wp\u0142ywu na obw\u00f3d.<\/p>\r\n<\/li>\r\n \t<li data-start=\"2646\" data-end=\"2699\">\r\n<p data-start=\"2649\" data-end=\"2699\"><strong data-start=\"2649\" data-end=\"2665\">Wydarzenie wzrostowe:<\/strong> Napi\u0119cie wzrasta powy\u017cej progu Uc.<\/p>\r\n<\/li>\r\n \t<li data-start=\"2700\" data-end=\"2819\">\r\n<p data-start=\"2703\" data-end=\"2819\"><strong data-start=\"2703\" data-end=\"2716\">Mocowanie:<\/strong> SPD kieruje pr\u0105d udarowy do masy, obni\u017caj\u0105c napi\u0119cie do bezpiecznego poziomu Up (poziom ochrony napi\u0119cia).<\/p>\r\n<\/li>\r\n \t<li data-start=\"2820\" data-end=\"2882\">\r\n<p data-start=\"2823\" data-end=\"2882\"><strong data-start=\"2823\" data-end=\"2836\">Powr\u00f3t do zdrowia:<\/strong> SPD powraca do stanu gotowo\u015bci o wysokiej rezystancji.<\/p>\r\n<\/li>\r\n<\/ol>\r\n<h2 data-start=\"2889\" data-end=\"2940\">Funkcja urz\u0105dzenia przeciwprzepi\u0119ciowego typu 2<\/h2>\r\n<p data-start=\"2942\" data-end=\"3106\">Podstawow\u0105 rol\u0105 urz\u0105dzenia przeciwprzepi\u0119ciowego typu 2 jest ograniczenie przej\u015bciowych przepi\u0119\u0107 do poziomu, kt\u00f3ry urz\u0105dzenia pod\u0142\u0105czone za urz\u0105dzeniem mog\u0105 wytrzyma\u0107 bez uszkodze\u0144.<\/p>\r\n<p data-start=\"3108\" data-end=\"3122\">Kluczowe funkcje:<\/p>\r\n\r\n<ul data-start=\"3123\" data-end=\"3659\">\r\n \t<li data-start=\"3123\" data-end=\"3228\">\r\n<p data-start=\"3125\" data-end=\"3228\"><strong data-start=\"3125\" data-end=\"3154\">Ograniczenie przepi\u0119\u0107 resztkowych<\/strong> \u2014 zmniejsza napi\u0119cie po tym, jak SPD typu 1 poch\u0142on\u0105\u0142 wi\u0119kszo\u015b\u0107 energii.<\/p>\r\n<\/li>\r\n \t<li data-start=\"3229\" data-end=\"3356\">\r\n<p data-start=\"3231\" data-end=\"3356\"><strong data-start=\"3231\" data-end=\"3262\">Prze\u0142\u0105czanie t\u0142umienia przepi\u0119\u0107<\/strong> \u2014 \u0142agodzi stany nieustalone zwi\u0105zane z rozruchem silnika, prze\u0142\u0105czaniem pomp lub innymi operacjami obci\u0105\u017cenia indukcyjnego.<\/p>\r\n<\/li>\r\n \t<li data-start=\"3357\" data-end=\"3471\">\r\n<p data-start=\"3359\" data-end=\"3471\"><strong data-start=\"3359\" data-end=\"3383\">Ochrona sprz\u0119tu<\/strong> \u2014 zapobiega uszkodzeniom wra\u017cliwych uk\u0142ad\u00f3w elektronicznych, sterownik\u00f3w PLC, system\u00f3w automatyki i osprz\u0119tu steruj\u0105cego.<\/p>\r\n<\/li>\r\n \t<li data-start=\"3472\" data-end=\"3544\">\r\n<p data-start=\"3474\" data-end=\"3544\"><strong data-start=\"3474\" data-end=\"3496\">Niezawodno\u015b\u0107 systemu<\/strong> \u2014 skraca czas przestoj\u00f3w spowodowany awariami zwi\u0105zanymi z przepi\u0119ciami.<\/p>\r\n<\/li>\r\n \t<li data-start=\"3545\" data-end=\"3659\">\r\n<p data-start=\"3547\" data-end=\"3659\"><strong data-start=\"3547\" data-end=\"3568\">Cz\u0119\u015b\u0107 kaskady<\/strong> \u2014 znajduje si\u0119 pomi\u0119dzy zabezpieczeniem wej\u015bcia us\u0142ugowego (typ 1) a urz\u0105dzeniami w miejscu poboru (typ 3).<\/p>\r\n<\/li>\r\n<\/ul>\r\n<h2 data-start=\"3666\" data-end=\"3716\">Zastosowania urz\u0105dze\u0144 przeciwprzepi\u0119ciowych typu 2<\/h2>\r\n<a href=\"https:\/\/www.britecelectric.com\/pl\/attachment\/spd-install\/\" rel=\"attachment wp-att-2159\"><img class=\"alignnone size-full wp-image-2159\" src=\"https:\/\/www.britecelectric.com\/wp-content\/uploads\/2025\/08\/SPD-install.jpg\" alt=\"\" width=\"745\" height=\"609\" \/><\/a>\r\n<p data-start=\"3718\" data-end=\"3747\">SPD typu 2 s\u0105 instalowane w:<\/p>\r\n\r\n<ul data-start=\"3748\" data-end=\"4151\">\r\n \t<li data-start=\"3748\" data-end=\"3810\">\r\n<p data-start=\"3750\" data-end=\"3810\">Obiekty przemys\u0142owe wyposa\u017cone w instalacje odgromowe.<\/p>\r\n<\/li>\r\n \t<li data-start=\"3811\" data-end=\"3891\">\r\n<p data-start=\"3813\" data-end=\"3891\">Budynki komercyjne do ochrony system\u00f3w HVAC, wind, o\u015bwietlenia i IT.<\/p>\r\n<\/li>\r\n \t<li data-start=\"3892\" data-end=\"3949\">\r\n<p data-start=\"3894\" data-end=\"3949\">Szafy sterownicze maszyn dla automatyki przemys\u0142owej.<\/p>\r\n<\/li>\r\n \t<li data-start=\"3950\" data-end=\"4034\">\r\n<p data-start=\"3952\" data-end=\"4034\">Systemy energii odnawialnej \u2014 takie jak falowniki fotowoltaiczne i sterowniki turbin wiatrowych \u2014 wymagaj\u0105 solidno\u015bci <a href=\"https:\/\/www.britecelectric.com\/pl\/product_category\/pv-surge-protection-type-2\/\" target=\"_blank\" rel=\"noopener\">ochrona przeciwprzepi\u0119ciowa<\/a> (zobacz nasze <strong><em><a class=\"\" href=\"https:\/\/www.britecelectric.com\/pl\/blog\/solar-surge-protection-devices-selection-guide\/\" target=\"_blank\" rel=\"noopener\" data-start=\"201\" data-end=\"334\">Przewodnik po wyborze urz\u0105dze\u0144 ochrony przeciwprzepi\u0119ciowej<\/a><\/em><\/strong> I <strong><em><a class=\"\" href=\"https:\/\/www.britecelectric.com\/pl\/blog\/surge-protection-for-solar-photovoltaic-systems\/\" target=\"_blank\" rel=\"noopener\" data-start=\"339\" data-end=\"474\">Ochrona przeciwprzepi\u0119ciowa dla system\u00f3w fotowoltaicznych<\/a><\/em><\/strong>).<\/p>\r\n<\/li>\r\n \t<li data-start=\"4035\" data-end=\"4093\">\r\n<p data-start=\"4037\" data-end=\"4093\">Szpitale i centra danych, gdzie czas sprawno\u015bci ma kluczowe znaczenie.<\/p>\r\n<\/li>\r\n \t<li data-start=\"4094\" data-end=\"4151\">\r\n<p data-start=\"4096\" data-end=\"4151\">G\u0142\u00f3wne panele mieszkalne do ochrony ca\u0142ego domu.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<h2 data-start=\"262\" data-end=\"316\">Urz\u0105dzenia przeciwprzepi\u0119ciowe typu 1, typu 2 i typu 3<\/h2>\r\n<p data-start=\"318\" data-end=\"648\">Urz\u0105dzenia przeciwprzepi\u0119ciowe dziel\u0105 si\u0119 na trzy g\u0142\u00f3wne typy. Ka\u017cdy typ ma inne zadanie w uk\u0142adzie elektrycznym. Wi\u0119cej mo\u017cesz przeczyta\u0107 w naszym szczeg\u00f3\u0142owym przewodniku tutaj: <em><strong><a class=\"\" href=\"https:\/\/www.britecelectric.com\/pl\/blog\/difference-between-type-1-type-2-and-type-3-surge-protective-devices\/\" target=\"_blank\" rel=\"noopener\" data-start=\"468\" data-end=\"647\">R\u00f3\u017cnica mi\u0119dzy urz\u0105dzeniami przeciwprzepi\u0119ciowymi typu 1, typu 2 i typu 3<\/a>.<\/strong><\/em><\/p>\r\n\r\n<table style=\"width: 60.5183%;\">\r\n<tbody>\r\n<tr>\r\n<td style=\"width: 20.4466%;\" width=\"142\"><strong><b>Funkcja<\/b><\/strong><\/td>\r\n<td style=\"width: 25.0372%;\" width=\"142\"><strong><b>SPD typu 1<\/b><\/strong><\/td>\r\n<td style=\"width: 28.1389%;\" width=\"142\"><strong><b>SPD typu 2<\/b><\/strong><\/td>\r\n<td style=\"width: 58.2638%;\" width=\"142\"><strong><b>SPD typu 3<\/b><\/strong><\/td>\r\n<\/tr>\r\n<tr>\r\n<td style=\"width: 20.4466%;\" width=\"142\">Lokalizacja<\/td>\r\n<td style=\"width: 25.0372%;\" width=\"142\">Instalowany przy wej\u015bciu serwisowym.<\/td>\r\n<td style=\"width: 28.1389%;\" width=\"142\">Zainstalowany na g\u0142\u00f3wnej tablicy rozdzielczej.<\/td>\r\n<td style=\"width: 58.2638%;\" width=\"142\">Instalowany w pobli\u017cu wra\u017cliwych \u0142adunk\u00f3w.<\/td>\r\n<\/tr>\r\n<tr>\r\n<td style=\"width: 20.4466%;\" width=\"142\">Przebieg testowy<\/td>\r\n<td style=\"width: 25.0372%;\" width=\"142\">Testowany impulsem piorunowym 10\/350 \u03bcs.<\/td>\r\n<td style=\"width: 28.1389%;\" width=\"142\">Testowany pr\u0105dem udarowym 8\/20 \u03bcs.<\/td>\r\n<td style=\"width: 58.2638%;\" width=\"142\">Testowane napi\u0119ciem 1,2\/50 \u03bcs + pr\u0105dem 8\/20 \u03bcs.<\/td>\r\n<\/tr>\r\n<tr>\r\n<td style=\"width: 20.4466%;\" width=\"142\">Zamiar<\/td>\r\n<td style=\"width: 25.0372%;\" width=\"142\">Wy\u0142adowuje sta\u0142y pr\u0105d piorunowy.<\/td>\r\n<td style=\"width: 28.1389%;\" width=\"142\">Ogranicza przepi\u0119cia resztkowe i przepi\u0119cia prze\u0142\u0105czaj\u0105ce.<\/td>\r\n<td style=\"width: 58.2638%;\" width=\"142\">Zapewnia ostateczn\u0105 ochron\u0119 elektroniki.<\/td>\r\n<\/tr>\r\n<tr>\r\n<td style=\"width: 20.4466%;\" width=\"142\">Typowy wzrost<\/td>\r\n<td style=\"width: 25.0372%;\" width=\"142\">\u2264 4 kV.<\/td>\r\n<td style=\"width: 28.1389%;\" width=\"142\">\u2264 2,5 kV.<\/td>\r\n<td style=\"width: 58.2638%;\" width=\"142\">\u2264 1,5 kV.<\/td>\r\n<\/tr>\r\n<tr>\r\n<td style=\"width: 20.4466%;\" width=\"142\">Przyk\u0142ady<\/td>\r\n<td style=\"width: 25.0372%;\" width=\"142\">Budynki wyposa\u017cone w instalacj\u0119 odgromow\u0105 (LPS).<\/td>\r\n<td style=\"width: 28.1389%;\" width=\"142\">Panele steruj\u0105ce i podrozdzielnice.<\/td>\r\n<td style=\"width: 58.2638%;\" width=\"142\">Sprz\u0119t IT i elektronika domowa.<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<p data-start=\"1409\" data-end=\"1423\"><strong data-start=\"1409\" data-end=\"1421\">Streszczenie:<\/strong><\/p>\r\n\r\n<ul data-start=\"1424\" data-end=\"1706\">\r\n \t<li data-start=\"1424\" data-end=\"1494\">\r\n<p data-start=\"1426\" data-end=\"1494\"><strong data-start=\"1426\" data-end=\"1440\">SPD typu 1<\/strong> zatrzymuje wi\u0119kszo\u015b\u0107 przepi\u0119\u0107 wysokoenergetycznych powodowanych przez pioruny.<\/p>\r\n<\/li>\r\n \t<li data-start=\"1495\" data-end=\"1610\">\r\n<p data-start=\"1497\" data-end=\"1610\"><strong data-start=\"1497\" data-end=\"1511\">SPD typu 2<\/strong> jest \u015brodkow\u0105 lini\u0105 obrony. Redukuje pozosta\u0142e napi\u0119cie udarowe i kontroluje przepi\u0119cia prze\u0142\u0105czaj\u0105ce.<\/p>\r\n<\/li>\r\n \t<li data-start=\"1611\" data-end=\"1706\">\r\n<p data-start=\"1613\" data-end=\"1706\"><strong data-start=\"1613\" data-end=\"1627\">SPD typu 3<\/strong> to ostatni krok. Chroni wra\u017cliw\u0105 elektronik\u0119 przed ma\u0142ymi, szybkimi przepi\u0119ciami.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<h2 data-start=\"4715\" data-end=\"4766\">Jak wybra\u0107 odpowiednie urz\u0105dzenie przeciwprzepi\u0119ciowe?<\/h2>\r\n<p data-start=\"4768\" data-end=\"4922\">Wybieraj\u0105c najlepsze urz\u0105dzenie przeciwprzepi\u0119ciowe typu 2, nale\u017cy dokona\u0107 wyboru w oparciu o kompatybilno\u015b\u0107 systemu, poziom ryzyka przepi\u0119\u0107 i czu\u0142o\u015b\u0107 sprz\u0119tu.<\/p>\r\n<p data-start=\"4924\" data-end=\"5057\"><strong data-start=\"4924\" data-end=\"4976\">1. Dopasuj napi\u0119cie systemu i uk\u0142ad uziemienia<\/strong><br data-start=\"4976\" data-end=\"4979\" \/>R\u00f3\u017cne systemy \u2014 TT, TN-S, TN-C, IT \u2014 wymagaj\u0105 r\u00f3\u017cnych konfiguracji SPD:<\/p>\r\n\r\n<ul data-start=\"5058\" data-end=\"5212\">\r\n \t<li data-start=\"5058\" data-end=\"5104\">\r\n<p data-start=\"5060\" data-end=\"5104\"><strong data-start=\"5060\" data-end=\"5066\">4P<\/strong> (ochrona wszystkich biegun\u00f3w) dla sieci TN.<\/p>\r\n<\/li>\r\n \t<li data-start=\"5105\" data-end=\"5212\">\r\n<p data-start=\"5107\" data-end=\"5212\"><strong data-start=\"5107\" data-end=\"5114\">3+1<\/strong> konfiguracja (zabezpieczenie L-N plus modu\u0142 N-PE) dla system\u00f3w TT do obs\u0142ugi zdarze\u0144 przepi\u0119ciowych N-PE.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<p data-start=\"5214\" data-end=\"5404\"><strong data-start=\"5214\" data-end=\"5272\">2. Okre\u015bl Uc (maksymalne ci\u0105g\u0142e napi\u0119cie robocze)<\/strong><br data-start=\"5272\" data-end=\"5275\" \/>Uc powinno by\u0107 nieco wy\u017csze od znamionowego napi\u0119cia systemu, aby zapobiec niepotrzebnemu wyzwalaniu, ale wystarczaj\u0105co niskie, aby zapewni\u0107 skuteczn\u0105 ochron\u0119.<\/p>\r\n<p data-start=\"5406\" data-end=\"5449\"><strong data-start=\"5406\" data-end=\"5447\">3. Sprawd\u017a zdolno\u015b\u0107 pr\u0105dow\u0105 roz\u0142adowania<\/strong><\/p>\r\n\r\n<ul data-start=\"5450\" data-end=\"5570\">\r\n \t<li data-start=\"5450\" data-end=\"5496\">\r\n<p data-start=\"5452\" data-end=\"5496\"><strong data-start=\"5452\" data-end=\"5487\">Nominalny pr\u0105d roz\u0142adowania (In):<\/strong> 5\u201320 kA.<\/p>\r\n<\/li>\r\n \t<li data-start=\"5497\" data-end=\"5570\">\r\n<p data-start=\"5499\" data-end=\"5570\"><strong data-start=\"5499\" data-end=\"5536\">Maksymalny pr\u0105d roz\u0142adowania (Imax):<\/strong> 20\u201380 kA w zale\u017cno\u015bci od poziomu ryzyka.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<p data-start=\"5572\" data-end=\"5721\"><strong data-start=\"5572\" data-end=\"5608\">4. Poziom ochrony napi\u0119ciowej (g\u00f3ra)<\/strong><br data-start=\"5608\" data-end=\"5611\" \/>Ni\u017csza g\u00f3ra oznacza lepsz\u0105 ochron\u0119 \u2014 nale\u017cy d\u0105\u017cy\u0107 do \u2264 2,5 kV dla sprz\u0119tu og\u00f3lnego, \u2264 1,5 kV dla wra\u017cliwej elektroniki.<\/p>\r\n<p data-start=\"5723\" data-end=\"5862\"><strong data-start=\"5723\" data-end=\"5767\">5. Wytrzyma\u0142o\u015b\u0107 na chwilowe przepi\u0119cie (TOV).<\/strong><br data-start=\"5767\" data-end=\"5770\" \/>Upewnij si\u0119, \u017ce SPD wytrzyma tymczasowe warunki przepi\u0119ciowe spowodowane awari\u0105 lub zdarzeniami prze\u0142\u0105czaj\u0105cymi.<\/p>\r\n<p data-start=\"5864\" data-end=\"5892\"><strong data-start=\"5864\" data-end=\"5890\">6. Dodatkowe funkcje<\/strong><\/p>\r\n\r\n<ul data-start=\"5893\" data-end=\"6019\">\r\n \t<li data-start=\"5893\" data-end=\"5935\">\r\n<p data-start=\"5895\" data-end=\"5935\">Wtykowe modu\u0142y umo\u017cliwiaj\u0105ce szybk\u0105 konserwacj\u0119.<\/p>\r\n<\/li>\r\n \t<li data-start=\"5936\" data-end=\"5975\">\r\n<p data-start=\"5938\" data-end=\"5975\">Zdalne styki alarmowe do monitorowania.<\/p>\r\n<\/li>\r\n \t<li data-start=\"5976\" data-end=\"6019\">\r\n<p data-start=\"5978\" data-end=\"6019\">Od\u0142\u0105cznik termiczny i wska\u017aniki wizualne.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<h2 data-start=\"6026\" data-end=\"6076\">Jak zainstalowa\u0107 urz\u0105dzenie przeciwprzepi\u0119ciowe typu 2<\/h2>\r\n<a href=\"https:\/\/www.britecelectric.com\/pl\/attachment\/type-2-spd-install\/\" rel=\"attachment wp-att-2158\"><img class=\"alignnone size-full wp-image-2158\" src=\"https:\/\/www.britecelectric.com\/wp-content\/uploads\/2025\/08\/Type-2-SPD-install.jpg\" alt=\"\" width=\"732\" height=\"615\" \/><\/a>\r\n<p data-start=\"6078\" data-end=\"6144\"><strong data-start=\"6078\" data-end=\"6144\">Najlepsze praktyki instalacyjne wynikaj\u0105ce z do\u015bwiadczenia in\u017cyniera w terenie:<\/strong><\/p>\r\n\r\n<ol data-start=\"6145\" data-end=\"7145\">\r\n \t<li data-start=\"6145\" data-end=\"6266\">\r\n<p data-start=\"6148\" data-end=\"6266\"><strong data-start=\"6148\" data-end=\"6160\">Lokalizacja<\/strong> \u2014 Zamontuj jak najbli\u017cej szyn zbiorczych g\u0142\u00f3wnej tablicy rozdzielczej lub sprz\u0119tu, kt\u00f3ry chcesz chroni\u0107.<\/p>\r\n<\/li>\r\n \t<li data-start=\"6267\" data-end=\"6362\">\r\n<p data-start=\"6270\" data-end=\"6362\"><strong data-start=\"6270\" data-end=\"6293\">Po\u0142\u0105czenie r\u00f3wnoleg\u0142e<\/strong> \u2014 SPD typu 2 s\u0105 zwykle pod\u0142\u0105czane r\u00f3wnolegle do \u017ar\u00f3d\u0142a zasilania.<\/p>\r\n<\/li>\r\n \t<li data-start=\"6363\" data-end=\"6506\">\r\n<p data-start=\"6366\" data-end=\"6506\"><strong data-start=\"6366\" data-end=\"6381\">D\u0142ugo\u015b\u0107 przewodu<\/strong> \u2014 Aby unikn\u0105\u0107 podniesienia napi\u0119cia ochronnego, \u0142\u0105czna d\u0142ugo\u015b\u0107 przewodu fazowego, neutralnego i uziemiaj\u0105cego powinna by\u0107 mniejsza ni\u017c 0,5 m.<\/p>\r\n<\/li>\r\n \t<li data-start=\"6507\" data-end=\"6619\">\r\n<p data-start=\"6510\" data-end=\"6619\"><strong data-start=\"6510\" data-end=\"6537\">Przekr\u00f3j przewodu<\/strong> \u2014 Co najmniej 6 mm\u00b2 miedzi dla typu 2; wi\u0119ksze rozmiary dla urz\u0105dze\u0144 o wi\u0119kszej pojemno\u015bci.<\/p>\r\n<\/li>\r\n \t<li data-start=\"6620\" data-end=\"6716\">\r\n<p data-start=\"6623\" data-end=\"6716\"><strong data-start=\"6623\" data-end=\"6635\">Uziemienie<\/strong> \u2014 Pod\u0142\u0105czy\u0107 bezpo\u015brednio do g\u0142\u00f3wnej szyny wyr\u00f3wnawczej najkr\u00f3tsz\u0105 drog\u0105.<\/p>\r\n<\/li>\r\n \t<li data-start=\"6717\" data-end=\"6840\">\r\n<p data-start=\"6720\" data-end=\"6840\"><strong data-start=\"6720\" data-end=\"6746\">Zabezpieczenie nadpr\u0105dowe<\/strong> \u2014 Use fuses or circuit breakers sized according to the SPD's maximum short-circuit withstand.<\/p>\r\n<\/li>\r\n \t<li data-start=\"6841\" data-end=\"7028\">\r\n<p data-start=\"6844\" data-end=\"7028\"><strong data-start=\"6844\" data-end=\"6880\">Koordynacja w systemach kaskadowych<\/strong> \u2014 W przypadku instalacji za SPD typu 1 nale\u017cy zachowa\u0107 odleg\u0142o\u015b\u0107 separacji (&gt; 10 m) lub zainstalowa\u0107 cewk\u0119 odsprz\u0119gaj\u0105c\u0105, aby zapewni\u0107 w\u0142a\u015bciwy podzia\u0142 energii.<\/p>\r\n<\/li>\r\n \t<li data-start=\"7029\" data-end=\"7145\">\r\n<p data-start=\"7032\" data-end=\"7145\"><strong data-start=\"7032\" data-end=\"7058\">Okablowanie specyficzne dla systemu<\/strong> \u2014 W przypadku system\u00f3w TT nale\u017cy uwzgl\u0119dni\u0107 modu\u0142 ochronny N-PE, kt\u00f3ry b\u0119dzie przeciwdzia\u0142a\u0142 przepi\u0119ciom przewodu neutralnego do ziemi.<\/p>\r\n<\/li>\r\n<\/ol>\r\n<p data-start=\"7147\" data-end=\"7255\">Przestrzeganie tych wytycznych gwarantuje, \u017ce SPD b\u0119dzie dzia\u0142a\u0107 zgodnie ze specyfikacj\u0105 i normami elektrycznymi.<\/p>\r\n\r\n<h2 data-start=\"7262\" data-end=\"7275\">Wniosek<\/h2>\r\n<p data-start=\"7277\" data-end=\"7508\">A <em><a href=\"https:\/\/www.britecelectric.com\/pl\/product-category\/ac-power-surge-protection\/type-2-surge-protective-device\/\" target=\"_blank\" rel=\"noopener\"><strong data-start=\"7279\" data-end=\"7313\">Urz\u0105dzenie przeciwprzepi\u0119ciowe typu 2<\/strong><\/a><\/em> jest istotnym elementem warstwowej ochrony elektrycznej. Chroni przed przepi\u0119ciami resztkowymi spowodowanymi wy\u0142adowaniami atmosferycznymi i wewn\u0119trznymi zdarzeniami prze\u0142\u0105czania, zapewniaj\u0105c trwa\u0142o\u015b\u0107 sprz\u0119tu i stabilno\u015b\u0107 operacyjn\u0105.<\/p>\r\n<p data-start=\"7510\" data-end=\"7767\">Rozumiej\u0105c zasad\u0119 dzia\u0142ania, zasady instalacji i parametry doboru, in\u017cynierowie i mened\u017cerowie ds. zaopatrzenia mog\u0105 okre\u015bli\u0107 urz\u0105dzenia, kt\u00f3re spe\u0142niaj\u0105 wymagania systemowe, s\u0105 zgodne z norm\u0105 IEC\/EN 61643-11 i zapewniaj\u0105 niezawodn\u0105 ochron\u0119 na nadchodz\u0105ce lata.<\/p>\r\n<p data-start=\"7769\" data-end=\"7951\">Prawid\u0142owo zainstalowany SPD typu 2 to nie tylko element \u2013 \u200b\u200bto polisa ubezpieczeniowa dla Twojej instalacji elektrycznej. Dowiedz si\u0119 wi\u0119cej o <strong><em><a class=\"\" href=\"https:\/\/www.britecelectric.com\/pl\/blog\/surge-protection-for-solar-photovoltaic-systems\/\" target=\"_blank\" rel=\"noopener\" data-start=\"1609\" data-end=\"1719\">zastosowania SPD w instalacjach fotowoltaicznych<\/a><\/em><\/strong> i jak wybra\u0107 ten w\u0142a\u015bciwy.<\/p>","protected":false},"featured_media":2160,"parent":0,"menu_order":127,"template":"","meta":{"_acf_changed":false},"blog_category":[9],"class_list":["post-2154","blog","type-blog","status-publish","has-post-thumbnail","hentry","blog_category-industry-news"],"acf":{"des":"A Type 2 Surge Protection Device protects electrical systems from residual surges and switching surges. It is installed at the main distribution board. It works with Type 1 and Type 3 SPDs to form layered protection. This blog explains how it works, where to use it, how to choose it, and how to install it.","txt":"<h2 data-start=\"226\" data-end=\"241\">Introduction<\/h2>\r\n<p data-start=\"243\" data-end=\"597\">A <a href=\"https:\/\/www.britecelectric.com\/product-category\/ac-power-surge-protection\/type-2-surge-protective-device\/\"><strong data-start=\"245\" data-end=\"279\">Type 2 Surge Protection Device<\/strong><\/a> (Type 2 SPD) is the backbone of surge protection inside modern electrical systems. Installed at the main distribution board or control cabinet, it acts as the second shield in a layered defense strategy \u2014 catching residual surges left by upstream Type 1 SPDs and suppressing transients generated inside the network.<\/p>\r\n<p data-start=\"599\" data-end=\"986\">These devices protect against 8\/20 \u03bcs impulse currents that occur from lightning-induced surges, switching events, or utility disturbances.<\/p>\r\nTo ensure reliable, long-term protection, engineers and technical buyers need to understand several key aspects of a Type 2 SPD:\r\n<ul>\r\n \t<li><b>Definition:<\/b> What is it?<\/li>\r\n \t<li><b>How it works:<\/b> Its operating principles.<\/li>\r\n \t<li><b>Standards:<\/b> Which regulations does it meet?<\/li>\r\n \t<li><b>Installation and Selection:<\/b> The rules for choosing and installing it correctly.<\/li>\r\n<\/ul>\r\n<h2 data-start=\"993\" data-end=\"1042\">Definition of a Type 2 Surge Protection Device<\/h2>\r\n<p data-start=\"1044\" data-end=\"1268\">According to the <a href=\"https:\/\/webstore.iec.ch\/en\/publication\/65314\" target=\"_blank\" rel=\"noopener\"><em><strong>IEC\/EN 61643-11 standard<\/strong><\/em><\/a>, a **Type 2 SPD** is a Class II device. It is designed for locations that do not have direct lightning strikes. However, these locations still face a risk of strong transient overvoltages..<\/p>\r\n<p data-start=\"1270\" data-end=\"1290\">Key characteristics:<\/p>\r\n\r\n<ul data-start=\"1291\" data-end=\"1618\">\r\n \t<li data-start=\"1291\" data-end=\"1335\">\r\n<p data-start=\"1293\" data-end=\"1335\">Tested with 8\/20 \u03bcs current waveforms.<\/p>\r\n<\/li>\r\n \t<li data-start=\"1336\" data-end=\"1466\">\r\n<p data-start=\"1338\" data-end=\"1466\">Typical nominal discharge current (In) is between 5\u201320 kA, with maximum discharge current (Imax) up to 40\u201380 kA.<\/p>\r\n<\/li>\r\n \t<li data-start=\"1467\" data-end=\"1530\">\r\n<p data-start=\"1469\" data-end=\"1530\">Mounted on the load side of the electrical service panel.<\/p>\r\n<\/li>\r\n \t<li data-start=\"1531\" data-end=\"1618\">\r\n<p data-start=\"1533\" data-end=\"1618\">Protects against both external residual surges and internal switching surges.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<p data-start=\"1620\" data-end=\"1802\">In practical application, a Type 2 SPD sits after a Type 1 device and before any downstream Type 3 point-of-use protection, forming part of a multi-stage surge protection system.<\/p>\r\n<p data-start=\"1620\" data-end=\"1802\"><a href=\"https:\/\/www.britecelectric.com\/product-category\/ac-power-surge-protection\/type-2-surge-protective-device\/\" target=\"_blank\" rel=\"noopener\"><img class=\"alignnone  wp-image-2160\" src=\"https:\/\/www.britecelectric.com\/wp-content\/uploads\/2025\/08\/BR-20-4P-1Type-2-Surge-Protection-Device.jpg-1024x1024.webp\" alt=\"\" width=\"900\" height=\"900\" \/><\/a><\/p>\r\n\r\n<h2 data-start=\"1809\" data-end=\"1859\">How does a <a href=\"https:\/\/www.britecelectric.com\/product-category\/ac-power-surge-protection\/type-2-surge-protective-device\/\" target=\"_blank\" rel=\"noopener\">Type 2 Surge Protection Device<\/a> work?<\/h2>\r\n<p data-start=\"1861\" data-end=\"2143\">A Type 2 SPD operates on the voltage clamping principle. Under normal voltage, it remains passive. When a transient surge exceeds its maximum continuous operating voltage (Uc), its internal components switch rapidly to a conductive state, shunting excess energy to ground.<\/p>\r\n<p data-start=\"2145\" data-end=\"2176\"><strong data-start=\"2145\" data-end=\"2176\">Typical components include:<\/strong><\/p>\r\n\r\n<ul data-start=\"2177\" data-end=\"2557\">\r\n \t<li data-start=\"2177\" data-end=\"2285\">\r\n<p data-start=\"2179\" data-end=\"2285\"><strong data-start=\"2179\" data-end=\"2210\">MOV (Metal Oxide Varistor):<\/strong> The primary clamping element, absorbing surge energy and reducing voltage.<\/p>\r\n<\/li>\r\n \t<li data-start=\"2286\" data-end=\"2385\">\r\n<p data-start=\"2288\" data-end=\"2385\"><strong data-start=\"2288\" data-end=\"2320\">Hybrid circuits (MOV + GDT):<\/strong> Combine high surge capacity with improved long-term reliability.<\/p>\r\n<\/li>\r\n \t<li data-start=\"2386\" data-end=\"2470\">\r\n<p data-start=\"2388\" data-end=\"2470\"><strong data-start=\"2388\" data-end=\"2418\">Thermal disconnect system:<\/strong> Isolates the SPD at end-of-life to maintain safety.<\/p>\r\n<\/li>\r\n \t<li data-start=\"2471\" data-end=\"2557\">\r\n<p data-start=\"2473\" data-end=\"2557\"><strong data-start=\"2473\" data-end=\"2494\">Status indicator:<\/strong> Visual window or contact output to show operational condition.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<p data-start=\"2559\" data-end=\"2582\"><strong data-start=\"2559\" data-end=\"2582\">Operation sequence:<\/strong><\/p>\r\n\r\n<ol data-start=\"2583\" data-end=\"2882\">\r\n \t<li data-start=\"2583\" data-end=\"2645\">\r\n<p data-start=\"2586\" data-end=\"2645\"><strong data-start=\"2586\" data-end=\"2602\">Normal mode:<\/strong> High resistance, no impact on the circuit.<\/p>\r\n<\/li>\r\n \t<li data-start=\"2646\" data-end=\"2699\">\r\n<p data-start=\"2649\" data-end=\"2699\"><strong data-start=\"2649\" data-end=\"2665\">Surge event:<\/strong> Voltage rises above the Uc threshold.<\/p>\r\n<\/li>\r\n \t<li data-start=\"2700\" data-end=\"2819\">\r\n<p data-start=\"2703\" data-end=\"2819\"><strong data-start=\"2703\" data-end=\"2716\">Clamping:<\/strong> SPD diverts surge current to ground, lowering the voltage to a safe Up (voltage protection level).<\/p>\r\n<\/li>\r\n \t<li data-start=\"2820\" data-end=\"2882\">\r\n<p data-start=\"2823\" data-end=\"2882\"><strong data-start=\"2823\" data-end=\"2836\">Recovery:<\/strong> SPD returns to high-resistance standby state.<\/p>\r\n<\/li>\r\n<\/ol>\r\n<h2 data-start=\"2889\" data-end=\"2940\">The function of a Type 2 Surge Protection Device<\/h2>\r\n<p data-start=\"2942\" data-end=\"3106\">The primary role of a surge protection device Type 2 is to limit transient overvoltages to a level that downstream equipment can withstand without damage.<\/p>\r\n<p data-start=\"3108\" data-end=\"3122\">Key functions:<\/p>\r\n\r\n<ul data-start=\"3123\" data-end=\"3659\">\r\n \t<li data-start=\"3123\" data-end=\"3228\">\r\n<p data-start=\"3125\" data-end=\"3228\"><strong data-start=\"3125\" data-end=\"3154\">Residual surge limitation<\/strong> \u2014 reduces voltage after a Type 1 SPD has absorbed the bulk of the energy.<\/p>\r\n<\/li>\r\n \t<li data-start=\"3229\" data-end=\"3356\">\r\n<p data-start=\"3231\" data-end=\"3356\"><strong data-start=\"3231\" data-end=\"3262\">Switching surge suppression<\/strong> \u2014 mitigates transients from motor starts, pump switching, or other inductive load operations.<\/p>\r\n<\/li>\r\n \t<li data-start=\"3357\" data-end=\"3471\">\r\n<p data-start=\"3359\" data-end=\"3471\"><strong data-start=\"3359\" data-end=\"3383\">Equipment protection<\/strong> \u2014 prevents damage to sensitive electronics, PLCs, automation systems, and control gear.<\/p>\r\n<\/li>\r\n \t<li data-start=\"3472\" data-end=\"3544\">\r\n<p data-start=\"3474\" data-end=\"3544\"><strong data-start=\"3474\" data-end=\"3496\">System reliability<\/strong> \u2014 reduces downtime from surge-related failures.<\/p>\r\n<\/li>\r\n \t<li data-start=\"3545\" data-end=\"3659\">\r\n<p data-start=\"3547\" data-end=\"3659\"><strong data-start=\"3547\" data-end=\"3568\">Part of a cascade<\/strong> \u2014 sits between the service entrance protection (Type 1) and point-of-use devices (Type 3).<\/p>\r\n<\/li>\r\n<\/ul>\r\n<h2 data-start=\"3666\" data-end=\"3716\">Applications of Type 2 Surge Protection Devices<\/h2>\r\n<a href=\"https:\/\/www.britecelectric.com\/attachment\/spd-install\/\" rel=\"attachment wp-att-2159\"><img class=\"alignnone size-full wp-image-2159\" src=\"https:\/\/www.britecelectric.com\/wp-content\/uploads\/2025\/08\/SPD-install.jpg\" alt=\"\" width=\"745\" height=\"609\" \/><\/a>\r\n<p data-start=\"3718\" data-end=\"3747\">Type 2 SPDs are installed in:<\/p>\r\n\r\n<ul data-start=\"3748\" data-end=\"4151\">\r\n \t<li data-start=\"3748\" data-end=\"3810\">\r\n<p data-start=\"3750\" data-end=\"3810\">Industrial facilities with lightning protection systems.<\/p>\r\n<\/li>\r\n \t<li data-start=\"3811\" data-end=\"3891\">\r\n<p data-start=\"3813\" data-end=\"3891\">Commercial buildings to protect HVAC, elevators, lighting, and IT systems.<\/p>\r\n<\/li>\r\n \t<li data-start=\"3892\" data-end=\"3949\">\r\n<p data-start=\"3894\" data-end=\"3949\">Machine control cabinets for industrial automation.<\/p>\r\n<\/li>\r\n \t<li data-start=\"3950\" data-end=\"4034\">\r\n<p data-start=\"3952\" data-end=\"4034\">Renewable energy systems\u2014such as solar PV inverters and wind turbine controls\u2014require robust <a href=\"https:\/\/www.britecelectric.com\/product_category\/pv-surge-protection-type-2\/\" target=\"_blank\" rel=\"noopener\">surge protection<\/a> (see our <strong><em><a class=\"\" href=\"https:\/\/www.britecelectric.com\/blog\/solar-surge-protection-devices-selection-guide\/\" target=\"_blank\" rel=\"noopener\" data-start=\"201\" data-end=\"334\">Solar Surge Protection Devices Selection Guide<\/a><\/em><\/strong> and <strong><em><a class=\"\" href=\"https:\/\/www.britecelectric.com\/blog\/surge-protection-for-solar-photovoltaic-systems\/\" target=\"_blank\" rel=\"noopener\" data-start=\"339\" data-end=\"474\">Surge Protection for Solar Photovoltaic Systems<\/a><\/em><\/strong>).<\/p>\r\n<\/li>\r\n \t<li data-start=\"4035\" data-end=\"4093\">\r\n<p data-start=\"4037\" data-end=\"4093\">Hospitals and data centers where uptime is critical.<\/p>\r\n<\/li>\r\n \t<li data-start=\"4094\" data-end=\"4151\">\r\n<p data-start=\"4096\" data-end=\"4151\">Residential main panels for whole-house protection.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<h2 data-start=\"262\" data-end=\"316\">Type 1, Type 2, and Type 3 Surge Protection Devices<\/h2>\r\n<p data-start=\"318\" data-end=\"648\">Surge protection devices have three main types. Each type has a different job in the electrical system. You can read more in our detailed guide here: <em><strong><a class=\"\" href=\"https:\/\/www.britecelectric.com\/blog\/difference-between-type-1-type-2-and-type-3-surge-protective-devices\/\" target=\"_blank\" rel=\"noopener\" data-start=\"468\" data-end=\"647\">Difference Between Type 1, Type 2, and Type 3 Surge Protective Devices<\/a>.<\/strong><\/em><\/p>\r\n\r\n<table style=\"width: 60.5183%;\">\r\n<tbody>\r\n<tr>\r\n<td style=\"width: 20.4466%;\" width=\"142\"><strong><b>Feature<\/b><\/strong><\/td>\r\n<td style=\"width: 25.0372%;\" width=\"142\"><strong><b>Type 1 SPD<\/b><\/strong><\/td>\r\n<td style=\"width: 28.1389%;\" width=\"142\"><strong><b>Type 2 SPD<\/b><\/strong><\/td>\r\n<td style=\"width: 58.2638%;\" width=\"142\"><strong><b>Type 3 SPD<\/b><\/strong><\/td>\r\n<\/tr>\r\n<tr>\r\n<td style=\"width: 20.4466%;\" width=\"142\">Location<\/td>\r\n<td style=\"width: 25.0372%;\" width=\"142\">Installed at the service entrance.<\/td>\r\n<td style=\"width: 28.1389%;\" width=\"142\">Installed at the main distribution board.<\/td>\r\n<td style=\"width: 58.2638%;\" width=\"142\">Installed close to sensitive loads.<\/td>\r\n<\/tr>\r\n<tr>\r\n<td style=\"width: 20.4466%;\" width=\"142\">Test waveform<\/td>\r\n<td style=\"width: 25.0372%;\" width=\"142\">Tested with 10\/350 \u03bcs lightning impulse.<\/td>\r\n<td style=\"width: 28.1389%;\" width=\"142\">Tested with 8\/20 \u03bcs surge current.<\/td>\r\n<td style=\"width: 58.2638%;\" width=\"142\">Tested with 1.2\/50 \u03bcs voltage + 8\/20 \u03bcs current.<\/td>\r\n<\/tr>\r\n<tr>\r\n<td style=\"width: 20.4466%;\" width=\"142\">Purpose<\/td>\r\n<td style=\"width: 25.0372%;\" width=\"142\">Discharges direct lightning current.<\/td>\r\n<td style=\"width: 28.1389%;\" width=\"142\">Limits residual surges and switching surges.<\/td>\r\n<td style=\"width: 58.2638%;\" width=\"142\">Gives final protection for electronics.<\/td>\r\n<\/tr>\r\n<tr>\r\n<td style=\"width: 20.4466%;\" width=\"142\">Typical Up<\/td>\r\n<td style=\"width: 25.0372%;\" width=\"142\">\u2264 4 kV.<\/td>\r\n<td style=\"width: 28.1389%;\" width=\"142\">\u2264 2.5 kV.<\/td>\r\n<td style=\"width: 58.2638%;\" width=\"142\">\u2264 1.5 kV.<\/td>\r\n<\/tr>\r\n<tr>\r\n<td style=\"width: 20.4466%;\" width=\"142\">Examples<\/td>\r\n<td style=\"width: 25.0372%;\" width=\"142\">Buildings with a lightning protection system (LPS).<\/td>\r\n<td style=\"width: 28.1389%;\" width=\"142\">Control panels and sub-distribution boards.<\/td>\r\n<td style=\"width: 58.2638%;\" width=\"142\">IT equipment and home electronics.<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<p data-start=\"1409\" data-end=\"1423\"><strong data-start=\"1409\" data-end=\"1421\">Summary:<\/strong><\/p>\r\n\r\n<ul data-start=\"1424\" data-end=\"1706\">\r\n \t<li data-start=\"1424\" data-end=\"1494\">\r\n<p data-start=\"1426\" data-end=\"1494\"><strong data-start=\"1426\" data-end=\"1440\">Type 1 SPD<\/strong> stops most of the high-energy surge from lightning.<\/p>\r\n<\/li>\r\n \t<li data-start=\"1495\" data-end=\"1610\">\r\n<p data-start=\"1497\" data-end=\"1610\"><strong data-start=\"1497\" data-end=\"1511\">Type 2 SPD<\/strong> is the middle line of defense. It reduces remaining surge voltage and controls switching surges.<\/p>\r\n<\/li>\r\n \t<li data-start=\"1611\" data-end=\"1706\">\r\n<p data-start=\"1613\" data-end=\"1706\"><strong data-start=\"1613\" data-end=\"1627\">Type 3 SPD<\/strong> is the last step. It protects sensitive electronics from small, fast surges.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<h2 data-start=\"4715\" data-end=\"4766\">How to select the right surge protection device?<\/h2>\r\n<p data-start=\"4768\" data-end=\"4922\">When choosing the best Type 2 surge protection device, selection should be based on system compatibility, surge risk level, and equipment sensitivity.<\/p>\r\n<p data-start=\"4924\" data-end=\"5057\"><strong data-start=\"4924\" data-end=\"4976\">1. Match system voltage and earthing arrangement<\/strong><br data-start=\"4976\" data-end=\"4979\" \/>Different systems \u2014 TT, TN-S, TN-C, IT \u2014 require different SPD configurations:<\/p>\r\n\r\n<ul data-start=\"5058\" data-end=\"5212\">\r\n \t<li data-start=\"5058\" data-end=\"5104\">\r\n<p data-start=\"5060\" data-end=\"5104\"><strong data-start=\"5060\" data-end=\"5066\">4P<\/strong> (all-pole protection) for TN systems.<\/p>\r\n<\/li>\r\n \t<li data-start=\"5105\" data-end=\"5212\">\r\n<p data-start=\"5107\" data-end=\"5212\"><strong data-start=\"5107\" data-end=\"5114\">3+1<\/strong> configuration (L-N protection plus N-PE module) for TT systems to handle N-PE overvoltage events.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<p data-start=\"5214\" data-end=\"5404\"><strong data-start=\"5214\" data-end=\"5272\">2. Determine Uc (Maximum Continuous Operating Voltage)<\/strong><br data-start=\"5272\" data-end=\"5275\" \/>Uc should be slightly above the nominal system voltage to prevent unnecessary triggering but low enough for effective protection.<\/p>\r\n<p data-start=\"5406\" data-end=\"5449\"><strong data-start=\"5406\" data-end=\"5447\">3. Check discharge current capability<\/strong><\/p>\r\n\r\n<ul data-start=\"5450\" data-end=\"5570\">\r\n \t<li data-start=\"5450\" data-end=\"5496\">\r\n<p data-start=\"5452\" data-end=\"5496\"><strong data-start=\"5452\" data-end=\"5487\">Nominal discharge current (In):<\/strong> 5\u201320 kA.<\/p>\r\n<\/li>\r\n \t<li data-start=\"5497\" data-end=\"5570\">\r\n<p data-start=\"5499\" data-end=\"5570\"><strong data-start=\"5499\" data-end=\"5536\">Maximum discharge current (Imax):<\/strong> 20\u201380 kA depending on risk level.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<p data-start=\"5572\" data-end=\"5721\"><strong data-start=\"5572\" data-end=\"5608\">4. Voltage protection level (Up)<\/strong><br data-start=\"5608\" data-end=\"5611\" \/>Lower Up means better protection \u2014 aim for \u2264 2.5 kV for general equipment, \u2264 1.5 kV for sensitive electronics.<\/p>\r\n<p data-start=\"5723\" data-end=\"5862\"><strong data-start=\"5723\" data-end=\"5767\">5. Temporary overvoltage (TOV) withstand<\/strong><br data-start=\"5767\" data-end=\"5770\" \/>Ensure the SPD can survive temporary overvoltage conditions from faults or switching events.<\/p>\r\n<p data-start=\"5864\" data-end=\"5892\"><strong data-start=\"5864\" data-end=\"5890\">6. Additional features<\/strong><\/p>\r\n\r\n<ul data-start=\"5893\" data-end=\"6019\">\r\n \t<li data-start=\"5893\" data-end=\"5935\">\r\n<p data-start=\"5895\" data-end=\"5935\">Pluggable modules for quick maintenance.<\/p>\r\n<\/li>\r\n \t<li data-start=\"5936\" data-end=\"5975\">\r\n<p data-start=\"5938\" data-end=\"5975\">Remote alarm contacts for monitoring.<\/p>\r\n<\/li>\r\n \t<li data-start=\"5976\" data-end=\"6019\">\r\n<p data-start=\"5978\" data-end=\"6019\">Thermal disconnect and visual indicators.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<h2 data-start=\"6026\" data-end=\"6076\">How to install a Type 2 surge protection device<\/h2>\r\n<a href=\"https:\/\/www.britecelectric.com\/attachment\/type-2-spd-install\/\" rel=\"attachment wp-att-2158\"><img class=\"alignnone size-full wp-image-2158\" src=\"https:\/\/www.britecelectric.com\/wp-content\/uploads\/2025\/08\/Type-2-SPD-install.jpg\" alt=\"\" width=\"732\" height=\"615\" \/><\/a>\r\n<p data-start=\"6078\" data-end=\"6144\"><strong data-start=\"6078\" data-end=\"6144\">Installation best practices from field engineering experience:<\/strong><\/p>\r\n\r\n<ol data-start=\"6145\" data-end=\"7145\">\r\n \t<li data-start=\"6145\" data-end=\"6266\">\r\n<p data-start=\"6148\" data-end=\"6266\"><strong data-start=\"6148\" data-end=\"6160\">Location<\/strong> \u2014 Mount as close as possible to the main distribution board busbars or the equipment you want to protect.<\/p>\r\n<\/li>\r\n \t<li data-start=\"6267\" data-end=\"6362\">\r\n<p data-start=\"6270\" data-end=\"6362\"><strong data-start=\"6270\" data-end=\"6293\">Parallel connection<\/strong> \u2014 Type 2 SPDs are usually connected in parallel to the power supply.<\/p>\r\n<\/li>\r\n \t<li data-start=\"6363\" data-end=\"6506\">\r\n<p data-start=\"6366\" data-end=\"6506\"><strong data-start=\"6366\" data-end=\"6381\">Lead length<\/strong> \u2014 Keep the combined length of phase, neutral, and ground conductors under 0.5 m to avoid raising the protection voltage.<\/p>\r\n<\/li>\r\n \t<li data-start=\"6507\" data-end=\"6619\">\r\n<p data-start=\"6510\" data-end=\"6619\"><strong data-start=\"6510\" data-end=\"6537\">Conductor cross-section<\/strong> \u2014 At least 6 mm\u00b2 copper for Type 2; larger sizes for higher-capacity devices.<\/p>\r\n<\/li>\r\n \t<li data-start=\"6620\" data-end=\"6716\">\r\n<p data-start=\"6623\" data-end=\"6716\"><strong data-start=\"6623\" data-end=\"6635\">Earthing<\/strong> \u2014 Connect directly to the main equipotential bonding bar with the shortest path.<\/p>\r\n<\/li>\r\n \t<li data-start=\"6717\" data-end=\"6840\">\r\n<p data-start=\"6720\" data-end=\"6840\"><strong data-start=\"6720\" data-end=\"6746\">Overcurrent protection<\/strong> \u2014 Use fuses or circuit breakers sized according to the SPD's maximum short-circuit withstand.<\/p>\r\n<\/li>\r\n \t<li data-start=\"6841\" data-end=\"7028\">\r\n<p data-start=\"6844\" data-end=\"7028\"><strong data-start=\"6844\" data-end=\"6880\">Coordination in cascaded systems<\/strong> \u2014 If installed downstream of a Type 1 SPD, maintain a separation distance (&gt;10 m) or install a decoupling inductor to ensure proper energy sharing.<\/p>\r\n<\/li>\r\n \t<li data-start=\"7029\" data-end=\"7145\">\r\n<p data-start=\"7032\" data-end=\"7145\"><strong data-start=\"7032\" data-end=\"7058\">System-specific wiring<\/strong> \u2014 For TT systems, include an N-PE protection module to handle neutral-to-earth surges.<\/p>\r\n<\/li>\r\n<\/ol>\r\n<p data-start=\"7147\" data-end=\"7255\">Following these guidelines ensures the SPD performs to specification and complies with electrical standards.<\/p>\r\n\r\n<h2 data-start=\"7262\" data-end=\"7275\">Conclusion<\/h2>\r\n<p data-start=\"7277\" data-end=\"7508\">A <em><a href=\"https:\/\/www.britecelectric.com\/product-category\/ac-power-surge-protection\/type-2-surge-protective-device\/\" target=\"_blank\" rel=\"noopener\"><strong data-start=\"7279\" data-end=\"7313\">Type 2 Surge Protection Device<\/strong><\/a><\/em> is a vital element in layered electrical protection. It safeguards against residual surges from lightning and internal switching events, ensuring equipment longevity and operational stability.<\/p>\r\n<p data-start=\"7510\" data-end=\"7767\">By understanding its working principle, installation rules, and selection parameters, engineers and procurement managers can specify devices that meet system requirements, comply with IEC\/EN 61643-11, and deliver reliable protection for years to come.<\/p>\r\n<p data-start=\"7769\" data-end=\"7951\">Correctly installed, a Type 2 SPD is not just a component \u2014 it\u2019s an insurance policy for your electrical system. Learn more about <strong><em><a class=\"\" href=\"https:\/\/www.britecelectric.com\/blog\/surge-protection-for-solar-photovoltaic-systems\/\" target=\"_blank\" rel=\"noopener\" data-start=\"1609\" data-end=\"1719\">solar SPD applications<\/a><\/em><\/strong> and how to choose the right one.<\/p>"},"_links":{"self":[{"href":"https:\/\/www.britecelectric.com\/pl\/wp-json\/wp\/v2\/blog\/2154","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.britecelectric.com\/pl\/wp-json\/wp\/v2\/blog"}],"about":[{"href":"https:\/\/www.britecelectric.com\/pl\/wp-json\/wp\/v2\/types\/blog"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.britecelectric.com\/pl\/wp-json\/wp\/v2\/media\/2160"}],"wp:attachment":[{"href":"https:\/\/www.britecelectric.com\/pl\/wp-json\/wp\/v2\/media?parent=2154"}],"wp:term":[{"taxonomy":"blog_category","embeddable":true,"href":"https:\/\/www.britecelectric.com\/pl\/wp-json\/wp\/v2\/blog_category?post=2154"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}