{"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\/es\/blog\/what-is-a-type-2-surge-protection-device\/","title":{"rendered":"\u00bfQu\u00e9 es un dispositivo de protecci\u00f3n contra sobretensiones tipo 2?"},"content":{"rendered":"<h2 data-start=\"226\" data-end=\"241\">Introducci\u00f3n<\/h2>\r\n<p data-start=\"243\" data-end=\"597\">A <a href=\"https:\/\/www.britecelectric.com\/es\/product-category\/ac-power-surge-protection\/type-2-surge-protective-device\/\"><strong data-start=\"245\" data-end=\"279\">Dispositivo de protecci\u00f3n contra sobretensiones tipo 2<\/strong><\/a> (SPD Tipo 2) es la columna vertebral de la protecci\u00f3n contra sobretensiones dentro de los sistemas el\u00e9ctricos modernos. Instalado en el tablero de distribuci\u00f3n principal o gabinete de control, act\u00faa como el segundo escudo en una estrategia de defensa en capas: captura las sobretensiones residuales dejadas por los SPD Tipo 1 ascendentes y suprime los transitorios generados dentro de la red.<\/p>\r\n<p data-start=\"599\" data-end=\"986\">Estos dispositivos protegen contra corrientes de impulso de 8\/20 \u03bcs que se producen por sobretensiones inducidas por rayos, eventos de conmutaci\u00f3n o perturbaciones de los servicios p\u00fablicos.<\/p>\r\nPara garantizar una protecci\u00f3n confiable a largo plazo, los ingenieros y compradores t\u00e9cnicos deben comprender varios aspectos clave de un SPD Tipo 2:\r\n<ul>\r\n \t<li><b>Definici\u00f3n:<\/b> \u00bfQu\u00e9 es?<\/li>\r\n \t<li><b>C\u00f3mo funciona:<\/b> Sus principios de funcionamiento.<\/li>\r\n \t<li><b>Est\u00e1ndares:<\/b> \u00bfQu\u00e9 normativa cumple?<\/li>\r\n \t<li><b>Instalaci\u00f3n y Selecci\u00f3n:<\/b> Las reglas para elegirlo e instalarlo correctamente.<\/li>\r\n<\/ul>\r\n<h2 data-start=\"993\" data-end=\"1042\">Definici\u00f3n de un dispositivo de protecci\u00f3n contra sobretensiones tipo 2<\/h2>\r\n<p data-start=\"1044\" data-end=\"1268\">Seg\u00fan el <a href=\"https:\/\/webstore.iec.ch\/en\/publication\/65314\" target=\"_blank\" rel=\"noopener\"><em><strong>Norma IEC\/EN 61643-11<\/strong><\/em><\/a>, un **SPD Tipo 2** es un dispositivo de Clase II. Est\u00e1 dise\u00f1ado para ubicaciones que no tienen impacto directo de rayos. Sin embargo, estos lugares a\u00fan enfrentan el riesgo de fuertes sobretensiones transitorias.<\/p>\r\n<p data-start=\"1270\" data-end=\"1290\">Caracter\u00edsticas clave:<\/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\">Probado con formas de onda de corriente de 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\">La corriente de descarga nominal t\u00edpica (In) est\u00e1 entre 5 y 20 kA, con una corriente de descarga m\u00e1xima (Imax) de hasta 40 y 80 kA.<\/p>\r\n<\/li>\r\n \t<li data-start=\"1467\" data-end=\"1530\">\r\n<p data-start=\"1469\" data-end=\"1530\">Montado en el lado de carga del panel de servicio el\u00e9ctrico.<\/p>\r\n<\/li>\r\n \t<li data-start=\"1531\" data-end=\"1618\">\r\n<p data-start=\"1533\" data-end=\"1618\">Protege contra sobretensiones residuales externas y sobretensiones de conmutaci\u00f3n internas.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<p data-start=\"1620\" data-end=\"1802\">En la aplicaci\u00f3n pr\u00e1ctica, un SPD Tipo 2 se ubica despu\u00e9s de un dispositivo Tipo 1 y antes de cualquier protecci\u00f3n de punto de uso Tipo 3 aguas abajo, formando parte de un sistema de protecci\u00f3n contra sobretensiones de m\u00faltiples etapas.<\/p>\r\n<p data-start=\"1620\" data-end=\"1802\"><a href=\"https:\/\/www.britecelectric.com\/es\/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\">\u00bfC\u00f3mo funciona un <a href=\"https:\/\/www.britecelectric.com\/es\/product-category\/ac-power-surge-protection\/type-2-surge-protective-device\/\" target=\"_blank\" rel=\"noopener\">Dispositivo de protecci\u00f3n contra sobretensiones tipo 2<\/a> \u00bftrabajar?<\/h2>\r\n<p data-start=\"1861\" data-end=\"2143\">Un SPD Tipo 2 funciona seg\u00fan el principio de fijaci\u00f3n de voltaje. Bajo voltaje normal, permanece pasivo. Cuando una sobretensi\u00f3n transitoria excede su voltaje operativo continuo m\u00e1ximo (Uc), sus componentes internos cambian r\u00e1pidamente a un estado conductor, desviando el exceso de energ\u00eda a tierra.<\/p>\r\n<p data-start=\"2145\" data-end=\"2176\"><strong data-start=\"2145\" data-end=\"2176\">Los componentes t\u00edpicos incluyen:<\/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 (varistor de \u00f3xido met\u00e1lico):<\/strong> El elemento de sujeci\u00f3n principal, que absorbe la sobretensi\u00f3n y reduce el voltaje.<\/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\">Circuitos h\u00edbridos (MOV + GDT):<\/strong> Combine una alta capacidad de sobretensi\u00f3n con una confiabilidad mejorada a largo plazo.<\/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\">Sistema de desconexi\u00f3n t\u00e9rmica:<\/strong> A\u00edsla el SPD al final de su vida \u00fatil para mantener la seguridad.<\/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\">Indicador de estado:<\/strong> Ventana visual o salida de contacto para mostrar la condici\u00f3n operativa.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<p data-start=\"2559\" data-end=\"2582\"><strong data-start=\"2559\" data-end=\"2582\">Secuencia de operaci\u00f3n:<\/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\">Modo normal:<\/strong> Alta resistencia, sin impacto en el circuito.<\/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\">Evento de sobretensi\u00f3n:<\/strong> El voltaje aumenta por encima del umbral 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\">Reprimici\u00f3n:<\/strong> El SPD desv\u00eda la sobretensi\u00f3n a tierra, reduciendo el voltaje a un nivel seguro (nivel de protecci\u00f3n de voltaje).<\/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\">Recuperaci\u00f3n:<\/strong> El SPD vuelve al estado de espera de alta resistencia.<\/p>\r\n<\/li>\r\n<\/ol>\r\n<h2 data-start=\"2889\" data-end=\"2940\">La funci\u00f3n de un dispositivo de protecci\u00f3n contra sobretensiones tipo 2<\/h2>\r\n<p data-start=\"2942\" data-end=\"3106\">La funci\u00f3n principal de un dispositivo de protecci\u00f3n contra sobretensiones Tipo 2 es limitar las sobretensiones transitorias a un nivel que los equipos aguas abajo puedan soportar sin sufrir da\u00f1os.<\/p>\r\n<p data-start=\"3108\" data-end=\"3122\">Funciones clave:<\/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\">Limitaci\u00f3n de sobretensi\u00f3n residual<\/strong> \u2014 reduce el voltaje despu\u00e9s de que un SPD Tipo 1 ha absorbido la mayor parte de la energ\u00eda.<\/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\">Supresi\u00f3n de sobretensiones de conmutaci\u00f3n<\/strong> \u2014 mitiga los transitorios provenientes de arranques de motores, conmutaci\u00f3n de bombas u otras operaciones de carga inductiva.<\/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\">Protecci\u00f3n de equipos<\/strong> \u2014 evita da\u00f1os a componentes electr\u00f3nicos sensibles, PLC, sistemas de automatizaci\u00f3n y equipos de control.<\/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\">Fiabilidad del sistema<\/strong> \u2014 reduce el tiempo de inactividad debido a fallas relacionadas con sobretensiones.<\/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\">Parte de una cascada<\/strong> \u2014 se encuentra entre la protecci\u00f3n de la entrada de servicio (Tipo 1) y los dispositivos del punto de uso (Tipo 3).<\/p>\r\n<\/li>\r\n<\/ul>\r\n<h2 data-start=\"3666\" data-end=\"3716\">Aplicaciones de los dispositivos de protecci\u00f3n contra sobretensiones tipo 2<\/h2>\r\n<a href=\"https:\/\/www.britecelectric.com\/es\/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\">Los SPD tipo 2 se instalan en:<\/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\">Instalaciones industriales con sistemas de protecci\u00f3n contra el rayo.<\/p>\r\n<\/li>\r\n \t<li data-start=\"3811\" data-end=\"3891\">\r\n<p data-start=\"3813\" data-end=\"3891\">Edificios comerciales para proteger HVAC, ascensores, iluminaci\u00f3n y sistemas de TI.<\/p>\r\n<\/li>\r\n \t<li data-start=\"3892\" data-end=\"3949\">\r\n<p data-start=\"3894\" data-end=\"3949\">Armarios de control de m\u00e1quinas para automatizaci\u00f3n industrial.<\/p>\r\n<\/li>\r\n \t<li data-start=\"3950\" data-end=\"4034\">\r\n<p data-start=\"3952\" data-end=\"4034\">Los sistemas de energ\u00eda renovable, como los inversores solares fotovoltaicos y los controles de turbinas e\u00f3licas, requieren sistemas s\u00f3lidos. <a href=\"https:\/\/www.britecelectric.com\/es\/product_category\/pv-surge-protection-type-2\/\" target=\"_blank\" rel=\"noopener\">protecci\u00f3n contra sobretensiones<\/a> (ver nuestro <strong><em><a class=\"\" href=\"https:\/\/www.britecelectric.com\/es\/blog\/solar-surge-protection-devices-selection-guide\/\" target=\"_blank\" rel=\"noopener\" data-start=\"201\" data-end=\"334\">Gu\u00eda de selecci\u00f3n de dispositivos de protecci\u00f3n contra sobretensiones solares<\/a><\/em><\/strong> y <strong><em><a class=\"\" href=\"https:\/\/www.britecelectric.com\/es\/blog\/surge-protection-for-solar-photovoltaic-systems\/\" target=\"_blank\" rel=\"noopener\" data-start=\"339\" data-end=\"474\">Protecci\u00f3n contra sobretensiones para sistemas solares fotovoltaicos<\/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\">Hospitales y centros de datos donde el tiempo de actividad es fundamental.<\/p>\r\n<\/li>\r\n \t<li data-start=\"4094\" data-end=\"4151\">\r\n<p data-start=\"4096\" data-end=\"4151\">Paneles principales residenciales para protecci\u00f3n de toda la casa.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<h2 data-start=\"262\" data-end=\"316\">Dispositivos de protecci\u00f3n contra sobretensiones tipo 1, tipo 2 y tipo 3<\/h2>\r\n<p data-start=\"318\" data-end=\"648\">Los dispositivos de protecci\u00f3n contra sobretensiones tienen tres tipos principales. Cada tipo tiene un trabajo diferente en el sistema el\u00e9ctrico. Puede leer m\u00e1s en nuestra gu\u00eda detallada aqu\u00ed: <em><strong><a class=\"\" href=\"https:\/\/www.britecelectric.com\/es\/blog\/difference-between-type-1-type-2-and-type-3-surge-protective-devices\/\" target=\"_blank\" rel=\"noopener\" data-start=\"468\" data-end=\"647\">Diferencia entre dispositivos de protecci\u00f3n contra sobretensiones tipo 1, tipo 2 y tipo 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>Caracter\u00edstica<\/b><\/strong><\/td>\r\n<td style=\"width: 25.0372%;\" width=\"142\"><strong><b>SPD tipo 1<\/b><\/strong><\/td>\r\n<td style=\"width: 28.1389%;\" width=\"142\"><strong><b>SPD tipo 2<\/b><\/strong><\/td>\r\n<td style=\"width: 58.2638%;\" width=\"142\"><strong><b>SPD tipo 3<\/b><\/strong><\/td>\r\n<\/tr>\r\n<tr>\r\n<td style=\"width: 20.4466%;\" width=\"142\">Ubicaci\u00f3n<\/td>\r\n<td style=\"width: 25.0372%;\" width=\"142\">Instalado en la entrada de servicio.<\/td>\r\n<td style=\"width: 28.1389%;\" width=\"142\">Instalado en el tablero de distribuci\u00f3n principal.<\/td>\r\n<td style=\"width: 58.2638%;\" width=\"142\">Instalado cerca de cargas sensibles.<\/td>\r\n<\/tr>\r\n<tr>\r\n<td style=\"width: 20.4466%;\" width=\"142\">Forma de onda de prueba<\/td>\r\n<td style=\"width: 25.0372%;\" width=\"142\">Probado con impulso de rayo de 10\/350 \u03bcs.<\/td>\r\n<td style=\"width: 28.1389%;\" width=\"142\">Probado con sobrecorriente de 8\/20 \u03bcs.<\/td>\r\n<td style=\"width: 58.2638%;\" width=\"142\">Probado con voltaje de 1,2\/50 \u03bcs + corriente de 8\/20 \u03bcs.<\/td>\r\n<\/tr>\r\n<tr>\r\n<td style=\"width: 20.4466%;\" width=\"142\">Objetivo<\/td>\r\n<td style=\"width: 25.0372%;\" width=\"142\">Descarga corriente directa del rayo.<\/td>\r\n<td style=\"width: 28.1389%;\" width=\"142\">Limita las sobretensiones residuales y las sobretensiones de conmutaci\u00f3n.<\/td>\r\n<td style=\"width: 58.2638%;\" width=\"142\">Da protecci\u00f3n final a la electr\u00f3nica.<\/td>\r\n<\/tr>\r\n<tr>\r\n<td style=\"width: 20.4466%;\" width=\"142\">T\u00edpico arriba<\/td>\r\n<td style=\"width: 25.0372%;\" width=\"142\">\u2264 4 kilovoltios.<\/td>\r\n<td style=\"width: 28.1389%;\" width=\"142\">\u2264 2,5 kilovoltios.<\/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\">Ejemplos<\/td>\r\n<td style=\"width: 25.0372%;\" width=\"142\">Edificios con sistema de protecci\u00f3n contra rayos (LPS).<\/td>\r\n<td style=\"width: 28.1389%;\" width=\"142\">Paneles de control y subcuadros de distribuci\u00f3n.<\/td>\r\n<td style=\"width: 58.2638%;\" width=\"142\">Equipos inform\u00e1ticos y electr\u00f3nica del hogar.<\/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\">Resumen:<\/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 tipo 1<\/strong> detiene la mayor parte de la oleada de alta energ\u00eda provocada por los rayos.<\/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 tipo 2<\/strong> es la l\u00ednea media de defensa. Reduce la sobretensi\u00f3n restante y controla las sobretensiones de conmutaci\u00f3n.<\/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 tipo 3<\/strong> es el \u00faltimo paso. Protege los componentes electr\u00f3nicos sensibles de sobretensiones peque\u00f1as y r\u00e1pidas.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<h2 data-start=\"4715\" data-end=\"4766\">\u00bfC\u00f3mo seleccionar el dispositivo de protecci\u00f3n contra sobretensiones adecuado?<\/h2>\r\n<p data-start=\"4768\" data-end=\"4922\">Al elegir el mejor dispositivo de protecci\u00f3n contra sobretensiones Tipo 2, la selecci\u00f3n debe basarse en la compatibilidad del sistema, el nivel de riesgo de sobretensi\u00f3n y la sensibilidad del equipo.<\/p>\r\n<p data-start=\"4924\" data-end=\"5057\"><strong data-start=\"4924\" data-end=\"4976\">1. Haga coincidir el voltaje del sistema y la disposici\u00f3n de puesta a tierra.<\/strong><br data-start=\"4976\" data-end=\"4979\" \/>Los diferentes sistemas (TT, TN-S, TN-C, IT) requieren diferentes configuraciones de 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> (protecci\u00f3n omnipolar) para sistemas 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> Configuraci\u00f3n (protecci\u00f3n L-N m\u00e1s m\u00f3dulo N-PE) para sistemas TT para manejar eventos de sobretensi\u00f3n 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. Determine Uc (voltaje m\u00e1ximo de funcionamiento continuo)<\/strong><br data-start=\"5272\" data-end=\"5275\" \/>Uc debe estar ligeramente por encima del voltaje nominal del sistema para evitar disparos innecesarios, pero lo suficientemente bajo para una protecci\u00f3n efectiva.<\/p>\r\n<p data-start=\"5406\" data-end=\"5449\"><strong data-start=\"5406\" data-end=\"5447\">3. Verifique la capacidad de corriente de descarga<\/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\">Corriente de descarga nominal (In):<\/strong> 5-20 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\">Corriente m\u00e1xima de descarga (Imax):<\/strong> 20\u201380 kA seg\u00fan el nivel de riesgo.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<p data-start=\"5572\" data-end=\"5721\"><strong data-start=\"5572\" data-end=\"5608\">4. Nivel de protecci\u00f3n de voltaje (Arriba)<\/strong><br data-start=\"5608\" data-end=\"5611\" \/>Lower Up significa una mejor protecci\u00f3n: apunte a \u2264 2,5 kV para equipos generales, \u2264 1,5 kV para componentes electr\u00f3nicos sensibles.<\/p>\r\n<p data-start=\"5723\" data-end=\"5862\"><strong data-start=\"5723\" data-end=\"5767\">5. Resistencia a sobretensi\u00f3n temporal (TOV)<\/strong><br data-start=\"5767\" data-end=\"5770\" \/>Aseg\u00farese de que el SPD pueda sobrevivir condiciones temporales de sobretensi\u00f3n debido a fallas o eventos de conmutaci\u00f3n.<\/p>\r\n<p data-start=\"5864\" data-end=\"5892\"><strong data-start=\"5864\" data-end=\"5890\">6. Funciones adicionales<\/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\">M\u00f3dulos enchufables para un mantenimiento r\u00e1pido.<\/p>\r\n<\/li>\r\n \t<li data-start=\"5936\" data-end=\"5975\">\r\n<p data-start=\"5938\" data-end=\"5975\">Contactos de alarma remota para monitoreo.<\/p>\r\n<\/li>\r\n \t<li data-start=\"5976\" data-end=\"6019\">\r\n<p data-start=\"5978\" data-end=\"6019\">Desconexi\u00f3n t\u00e9rmica e indicadores visuales.<\/p>\r\n<\/li>\r\n<\/ul>\r\n<h2 data-start=\"6026\" data-end=\"6076\">C\u00f3mo instalar un dispositivo de protecci\u00f3n contra sobretensiones tipo 2<\/h2>\r\n<a href=\"https:\/\/www.britecelectric.com\/es\/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\">Mejores pr\u00e1cticas de instalaci\u00f3n basadas en la experiencia en ingenier\u00eda de campo:<\/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\">Ubicaci\u00f3n<\/strong> \u2014 Montar lo m\u00e1s cerca posible de las barras del tablero de distribuci\u00f3n principal o del equipo que desea proteger.<\/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\">Conexi\u00f3n paralela<\/strong> \u2014 Los SPD de tipo 2 suelen conectarse en paralelo a la fuente de alimentaci\u00f3n.<\/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\">Longitud del cable<\/strong> \u2014 Mantenga la longitud combinada de los conductores de fase, neutro y tierra por debajo de 0,5 m para evitar elevar la tensi\u00f3n de protecci\u00f3n.<\/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\">Secci\u00f3n del conductor<\/strong> \u2014 Al menos 6 mm\u00b2 de cobre para el Tipo 2; tama\u00f1os m\u00e1s grandes para dispositivos de mayor capacidad.<\/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\">Toma de tierra<\/strong> \u2014 Conectar directamente a la barra de conexi\u00f3n equipotencial principal con el camino m\u00e1s corto.<\/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\">Protecci\u00f3n contra sobrecorriente<\/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\">Coordinaci\u00f3n en sistemas en cascada<\/strong> \u2014 Si se instala aguas abajo de un SPD Tipo 1, mantenga una distancia de separaci\u00f3n (&gt;10 m) o instale un inductor de desacoplamiento para garantizar un intercambio de energ\u00eda adecuado.<\/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\">Cableado espec\u00edfico del sistema<\/strong> \u2014 Para sistemas TT, incluir un m\u00f3dulo de protecci\u00f3n N-PE para manejar sobretensiones de neutro a tierra.<\/p>\r\n<\/li>\r\n<\/ol>\r\n<p data-start=\"7147\" data-end=\"7255\">Seguir estas pautas garantiza que el SPD funcione seg\u00fan las especificaciones y cumpla con los est\u00e1ndares el\u00e9ctricos.<\/p>\r\n\r\n<h2 data-start=\"7262\" data-end=\"7275\">Conclusi\u00f3n<\/h2>\r\n<p data-start=\"7277\" data-end=\"7508\">A <em><a href=\"https:\/\/www.britecelectric.com\/es\/product-category\/ac-power-surge-protection\/type-2-surge-protective-device\/\" target=\"_blank\" rel=\"noopener\"><strong data-start=\"7279\" data-end=\"7313\">Dispositivo de protecci\u00f3n contra sobretensiones tipo 2<\/strong><\/a><\/em> Es un elemento vital en la protecci\u00f3n el\u00e9ctrica por capas. Protege contra sobretensiones residuales provocadas por rayos y eventos de conmutaci\u00f3n interna, lo que garantiza la longevidad del equipo y la estabilidad operativa.<\/p>\r\n<p data-start=\"7510\" data-end=\"7767\">Al comprender su principio de funcionamiento, reglas de instalaci\u00f3n y par\u00e1metros de selecci\u00f3n, los ingenieros y gerentes de adquisiciones pueden especificar dispositivos que cumplan con los requisitos del sistema, cumplan con IEC\/EN 61643-11 y brinden protecci\u00f3n confiable en los a\u00f1os venideros.<\/p>\r\n<p data-start=\"7769\" data-end=\"7951\">Instalado correctamente, un SPD Tipo 2 no es solo un componente: es una p\u00f3liza de seguro para su sistema el\u00e9ctrico. M\u00e1s informaci\u00f3n sobre <strong><em><a class=\"\" href=\"https:\/\/www.britecelectric.com\/es\/blog\/surge-protection-for-solar-photovoltaic-systems\/\" target=\"_blank\" rel=\"noopener\" data-start=\"1609\" data-end=\"1719\">aplicaciones solares SPD<\/a><\/em><\/strong> y c\u00f3mo elegir el correcto.<\/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\/es\/wp-json\/wp\/v2\/blog\/2154","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.britecelectric.com\/es\/wp-json\/wp\/v2\/blog"}],"about":[{"href":"https:\/\/www.britecelectric.com\/es\/wp-json\/wp\/v2\/types\/blog"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.britecelectric.com\/es\/wp-json\/wp\/v2\/media\/2160"}],"wp:attachment":[{"href":"https:\/\/www.britecelectric.com\/es\/wp-json\/wp\/v2\/media?parent=2154"}],"wp:term":[{"taxonomy":"blog_category","embeddable":true,"href":"https:\/\/www.britecelectric.com\/es\/wp-json\/wp\/v2\/blog_category?post=2154"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}