{"id":4354,"date":"2026-08-24T14:36:47","date_gmt":"2026-08-24T06:36:47","guid":{"rendered":"https:\/\/cnkuangya.com\/?p=4354"},"modified":"2026-08-24T14:36:53","modified_gmt":"2026-08-24T06:36:53","slug":"dc-spd-selection-guide","status":"publish","type":"post","link":"https:\/\/cnkuangya.com\/es\/blog\/dc-spd-selection-guide\/","title":{"rendered":"C\u00f3mo seleccionar la tensi\u00f3n nominal correcta del SPD de CC para sistemas solares fotovoltaicos"},"content":{"rendered":"<h2 class=\"wp-block-heading\">Gu\u00eda pr\u00e1ctica para elegir dispositivos de protecci\u00f3n contra sobretensiones (SPD) de CC de 600V, 1000V y 1500V<\/h2>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Introducci\u00f3n<\/h2>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong>Selecci\u00f3n de SPD de CC<\/strong> es uno de los pasos m\u00e1s importantes en el dise\u00f1o de un sistema de protecci\u00f3n solar fotovoltaica (FV) fiable. Seleccionar la tensi\u00f3n nominal correcta de un dispositivo de protecci\u00f3n contra sobretensiones de CC (SPD de CC) garantiza un rendimiento de protecci\u00f3n fiable y la estabilidad del sistema a largo plazo.<\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">Muchos usuarios se centran principalmente en la corriente de descarga nominal (kA) al elegir un SPD, pero la tensi\u00f3n nominal es igual de cr\u00edtica. El SPD de CC seleccionado debe ser capaz de soportar la m\u00e1xima tensi\u00f3n posible generada por el sistema fotovoltaico en condiciones normales de funcionamiento.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Un SPD con una tensi\u00f3n nominal insuficiente puede sufrir una degradaci\u00f3n o fallo prematuro, mientras que un SPD con una tensi\u00f3n nominal innecesariamente alta puede no proporcionar el nivel de protecci\u00f3n m\u00e1s optimizado para la aplicaci\u00f3n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Para los sistemas fotovoltaicos, el par\u00e1metro de tensi\u00f3n clave es <strong>Ucpv (Tensi\u00f3n m\u00e1xima de funcionamiento continuo para sistemas fotovoltaicos)<\/strong>. La selecci\u00f3n correcta requiere comprender la tensi\u00f3n m\u00e1xima del sistema fotovoltaico, la tensi\u00f3n de circuito abierto del m\u00f3dulo (Voc) y los efectos de la temperatura.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Esta gu\u00eda explica c\u00f3mo seleccionar la tensi\u00f3n nominal correcta del SPD de CC para sistemas solares fotovoltaicos, incluyendo aplicaciones comunes de 600V CC, 1000V CC y 1500V CC.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Principales conclusiones<\/h1>\n\n\n\n<ul class=\"wp-block-list\">\n<li>La selecci\u00f3n de la tensi\u00f3n del SPD de CC debe basarse en la tensi\u00f3n m\u00e1xima del sistema fotovoltaico, no solo en la tensi\u00f3n del inversor.<\/li>\n\n\n\n<li>Ucpv es el par\u00e1metro clave para seleccionar las tensiones nominales de los SPD de CC fotovoltaicos.<\/li>\n\n\n\n<li>El c\u00e1lculo de la tensi\u00f3n del sistema fotovoltaico debe considerar la Voc del m\u00f3dulo y los factores de correcci\u00f3n de temperatura.<\/li>\n\n\n\n<li>Los SPD de 1000V CC y 1500V CC est\u00e1n dise\u00f1ados para diferentes niveles de tensi\u00f3n de sistemas fotovoltaicos.<\/li>\n\n\n\n<li>La selecci\u00f3n correcta del SPD equilibra la tensi\u00f3n nominal, el nivel de protecci\u00f3n (Up) y los requisitos del sistema.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">\u00bfQu\u00e9 significa la tensi\u00f3n nominal de un SPD de CC?<\/h1>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/cnkuangya.com\/wp-content\/uploads\/2026\/08\/dc-spd-internal-components-structure-1024x576.jpg\" alt=\"Internal structure of a DC surge protective device\" class=\"wp-image-4356\" srcset=\"https:\/\/cnkuangya.com\/wp-content\/uploads\/2026\/08\/dc-spd-internal-components-structure-1024x576.jpg 1024w, https:\/\/cnkuangya.com\/wp-content\/uploads\/2026\/08\/dc-spd-internal-components-structure-300x169.jpg 300w, https:\/\/cnkuangya.com\/wp-content\/uploads\/2026\/08\/dc-spd-internal-components-structure-768x432.jpg 768w, https:\/\/cnkuangya.com\/wp-content\/uploads\/2026\/08\/dc-spd-internal-components-structure-1536x864.jpg 1536w, https:\/\/cnkuangya.com\/wp-content\/uploads\/2026\/08\/dc-spd-internal-components-structure-18x10.jpg 18w, https:\/\/cnkuangya.com\/wp-content\/uploads\/2026\/08\/dc-spd-internal-components-structure-600x338.jpg 600w, https:\/\/cnkuangya.com\/wp-content\/uploads\/2026\/08\/dc-spd-internal-components-structure.jpg 1672w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">Componentes internos principales de un SPD de CC utilizado para protecci\u00f3n fotovoltaica<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">La tensi\u00f3n nominal de un SPD de CC indica la tensi\u00f3n de CC m\u00e1xima que el SPD puede soportar de forma continua sin activar su funci\u00f3n de protecci\u00f3n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Para comprender c\u00f3mo responden los SPD de CC durante eventos de sobretensi\u00f3n, consulte nuestra gu\u00eda sobre <strong><a href=\"https:\/\/cnkuangya.com\/es\/blog\/how-dc-spd-works-operating-principles-components-engineers-guide\/\">c\u00f3mo funciona un SPD de CC<\/a><\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Para aplicaciones fotovoltaicas, el par\u00e1metro de tensi\u00f3n m\u00e1s importante es:<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Ucpv \u2014 Tensi\u00f3n m\u00e1xima de funcionamiento continuo para sistemas fotovoltaicos<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Ucpv define la tensi\u00f3n m\u00e1xima que puede aplicarse continuamente al SPD durante el funcionamiento normal de la instalaci\u00f3n fotovoltaica.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">El Ucpv seleccionado debe ser:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Igual o superior a la tensi\u00f3n m\u00e1xima del sistema fotovoltaico<\/li>\n\n\n\n<li>Adecuado para la configuraci\u00f3n del sistema fotovoltaico<\/li>\n\n\n\n<li>Compatible con el nivel de protecci\u00f3n requerido<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Por ejemplo:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Clasificaci\u00f3n del SPD de CC<\/th><th>Aplicaci\u00f3n com\u00fan<\/th><\/tr><\/thead><tbody><tr><td>SPD de 600V CC<\/td><td>Sistemas fotovoltaicos de peque\u00f1a escala<\/td><\/tr><tr><td>SPD de 1000V CC<\/td><td>Sistemas fotovoltaicos comerciales e industriales<\/td><\/tr><tr><td>SPD de 1500V CC<\/td><td>Proyectos solares a gran escala y de servicios p\u00fablicos<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/cnkuangya.com\/wp-content\/uploads\/2026\/08\/ucpv-selection-solar-pv-system-voltag-1024x683.jpg\" alt=\"Ucpv selection for solar PV DC SPD voltage rating\" class=\"wp-image-4357\" srcset=\"https:\/\/cnkuangya.com\/wp-content\/uploads\/2026\/08\/ucpv-selection-solar-pv-system-voltag-1024x683.jpg 1024w, https:\/\/cnkuangya.com\/wp-content\/uploads\/2026\/08\/ucpv-selection-solar-pv-system-voltag-300x200.jpg 300w, https:\/\/cnkuangya.com\/wp-content\/uploads\/2026\/08\/ucpv-selection-solar-pv-system-voltag-768x512.jpg 768w, https:\/\/cnkuangya.com\/wp-content\/uploads\/2026\/08\/ucpv-selection-solar-pv-system-voltag-18x12.jpg 18w, https:\/\/cnkuangya.com\/wp-content\/uploads\/2026\/08\/ucpv-selection-solar-pv-system-voltag-600x400.jpg 600w, https:\/\/cnkuangya.com\/wp-content\/uploads\/2026\/08\/ucpv-selection-solar-pv-system-voltag.jpg 1536w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">El Ucpv debe seleccionarse de acuerdo con la tensi\u00f3n m\u00e1xima del sistema fotovoltaico.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Selecci\u00f3n de SPD de CC basada en la tensi\u00f3n del sistema fotovoltaico<\/h2>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">La selecci\u00f3n del SPD de CC depende de la tensi\u00f3n m\u00e1xima del sistema fotovoltaico, las caracter\u00edsticas de los m\u00f3dulos, las condiciones de temperatura y los requisitos de instalaci\u00f3n. Seleccionar la tensi\u00f3n nominal correcta es el primer paso antes de elegir el modelo final de SPD.<\/p>\n<\/blockquote>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">Los principales factores que afectan la selecci\u00f3n del SPD de CC incluyen:<\/p>\n<\/blockquote>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Tensi\u00f3n m\u00e1xima del sistema fotovoltaico<\/li>\n\n\n\n<li>Tensi\u00f3n de circuito abierto del m\u00f3dulo (Voc)<\/li>\n\n\n\n<li>Factor de correcci\u00f3n por temperatura<\/li>\n\n\n\n<li>Nivel de protecci\u00f3n requerido (Up)<\/li>\n\n\n\n<li>Entorno de instalaci\u00f3n<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Selecci\u00f3n de SPD de CC: Por qu\u00e9 es importante la tensi\u00f3n nominal<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Elegir una tensi\u00f3n nominal incorrecta puede afectar la fiabilidad del sistema y el rendimiento de la protecci\u00f3n.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"819\" src=\"https:\/\/cnkuangya.com\/wp-content\/uploads\/2026\/08\/dc-spd-selection-process-flowchart-1024x819.jpg\" alt=\"DC SPD selection process for solar PV systems\" class=\"wp-image-4358\" srcset=\"https:\/\/cnkuangya.com\/wp-content\/uploads\/2026\/08\/dc-spd-selection-process-flowchart-1024x819.jpg 1024w, https:\/\/cnkuangya.com\/wp-content\/uploads\/2026\/08\/dc-spd-selection-process-flowchart-300x240.jpg 300w, https:\/\/cnkuangya.com\/wp-content\/uploads\/2026\/08\/dc-spd-selection-process-flowchart-768x615.jpg 768w, https:\/\/cnkuangya.com\/wp-content\/uploads\/2026\/08\/dc-spd-selection-process-flowchart-15x12.jpg 15w, https:\/\/cnkuangya.com\/wp-content\/uploads\/2026\/08\/dc-spd-selection-process-flowchart-600x480.jpg 600w, https:\/\/cnkuangya.com\/wp-content\/uploads\/2026\/08\/dc-spd-selection-process-flowchart.jpg 1402w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">Un enfoque sistem\u00e1tico para seleccionar la tensi\u00f3n nominal correcta del SPD de CC.<\/figcaption><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Selecci\u00f3n de un SPD con una tensi\u00f3n nominal demasiado baja<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Ejemplo:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Un sistema fotovoltaico tiene una tensi\u00f3n m\u00e1xima cercana a 1200V CC, pero se ha instalado un SPD de 1000V CC.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Potential problems:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The SPD may operate beyond its intended voltage range.<\/li>\n\n\n\n<li>Internal components may degrade faster.<\/li>\n\n\n\n<li>Protection reliability may be reduced.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The SPD voltage rating should never be lower than the maximum calculated PV system voltage.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Selecting an SPD with Excessively High Voltage Rating<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Ejemplo:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A 600V PV system uses a 1500V DC SPD.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Although the SPD may withstand the voltage, it may not always provide the most optimized protection.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A higher voltage-rated SPD may have:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Higher protection voltage level (Up)<\/li>\n\n\n\n<li>Lower protection margin for sensitive equipment<\/li>\n\n\n\n<li>Higher product cost<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The goal is not to select the highest voltage rating, but the correct voltage rating.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Understanding Ucpv, Uc and Up<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">When selecting a DC SPD, several voltage parameters are commonly used.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Ucpv (Tensi\u00f3n m\u00e1xima de funcionamiento continuo para sistemas fotovoltaicos)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Ucpv is the most important parameter for photovoltaic DC SPD selection.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It represents the maximum voltage that the SPD can continuously withstand in a PV system.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The selected Ucpv must be higher than the maximum possible PV system voltage.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Uc (Maximum Continuous Operating Voltage)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Uc is commonly used for general surge protective devices.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For PV-specific applications, Ucpv is normally the key parameter because photovoltaic systems have unique DC voltage characteristics.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Up (Voltage Protection Level)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Up represents the maximum voltage that can appear across the protected equipment during a surge event.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A lower Up generally means better protection performance.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When selecting an SPD, both Ucpv and Up should be considered.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">How to Calculate Maximum PV System Voltage<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">The maximum PV system voltage should be calculated based on:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Number of PV modules connected in series<\/li>\n\n\n\n<li>Tensi\u00f3n de circuito abierto del m\u00f3dulo (Voc)<\/li>\n\n\n\n<li>Factor de correcci\u00f3n por temperatura<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The calculation formula is:<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Maximum PV Voltage = Number of Series Modules \u00d7 Module Voc \u00d7 Temperature Correction Factor<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Where:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Par\u00e1metro<\/th><th>Descripci\u00f3n<\/th><\/tr><\/thead><tbody><tr><td>Number of Series Modules<\/td><td>Total PV modules connected in series in one string<\/td><\/tr><tr><td>Voc<\/td><td>Open-circuit voltage of one PV module<\/td><\/tr><tr><td>Temperature Correction Factor<\/td><td>Voltage adjustment factor considering low-temperature conditions<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Example Calculation<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A PV string contains:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Number of modules connected in series: <strong>24<\/strong><\/li>\n\n\n\n<li>Module open-circuit voltage (Voc): <strong>45V<\/strong><\/li>\n\n\n\n<li>Temperature correction factor: <strong>1.10<\/strong><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1lculo:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>24 \u00d7 45V \u00d7 1.10 = 1188V<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The maximum PV system voltage is:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>1188V DC<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Therefore, a <strong>SPD de 1500V CC<\/strong> should be selected to provide sufficient voltage margin.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Voltage calculation is the first step in DC SPD selection. For a complete sizing approach including current ratings and protection requirements, refer to our guide on <strong><a href=\"https:\/\/cnkuangya.com\/es\/blog\/how-to-size-a-dc-spd-for-a-solar-pv-array\/\">c\u00f3mo dimensionar un SPD de CC para una matriz fotovoltaica solar<\/a><\/strong>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Nota importante<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The selected DC SPD voltage rating should not be lower than the calculated maximum PV system voltage.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For photovoltaic applications, the SPD parameter <strong>Ucpv<\/strong> should be equal to or higher than the maximum calculated PV voltage.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"819\" src=\"https:\/\/cnkuangya.com\/wp-content\/uploads\/2026\/08\/pv-system-voltage-calculation-dc-spd-selection-1024x819.jpg\" alt=\"PV system voltage calculation for DC SPD selection\" class=\"wp-image-4359\" srcset=\"https:\/\/cnkuangya.com\/wp-content\/uploads\/2026\/08\/pv-system-voltage-calculation-dc-spd-selection-1024x819.jpg 1024w, https:\/\/cnkuangya.com\/wp-content\/uploads\/2026\/08\/pv-system-voltage-calculation-dc-spd-selection-300x240.jpg 300w, https:\/\/cnkuangya.com\/wp-content\/uploads\/2026\/08\/pv-system-voltage-calculation-dc-spd-selection-768x615.jpg 768w, https:\/\/cnkuangya.com\/wp-content\/uploads\/2026\/08\/pv-system-voltage-calculation-dc-spd-selection-15x12.jpg 15w, https:\/\/cnkuangya.com\/wp-content\/uploads\/2026\/08\/pv-system-voltage-calculation-dc-spd-selection-600x480.jpg 600w, https:\/\/cnkuangya.com\/wp-content\/uploads\/2026\/08\/pv-system-voltage-calculation-dc-spd-selection.jpg 1402w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">Maximum PV voltage calculation helps determine the correct DC SPD rating.<\/figcaption><\/figure>\n\n\n\n<h1 class=\"wp-block-heading\">DC SPD Voltage Selection Calculator<\/h1>\n\n\n\n<div class=\"spd-calculator\">\n\n<h2>Solar PV DC SPD Voltage Calculator<\/h2>\n\n<p>\nCalculate the recommended DC SPD voltage rating based on your PV system parameters.\n<\/p>\n\n\n<label>\nNumber of PV Modules in Series\n<\/label>\n\n<input id=\"modules\" type=\"number\" placeholder=\"Example: 24\">\n\n\n<label>\nModule Open Circuit Voltage (Voc) (V)\n<\/label>\n\n<input id=\"voc\" type=\"number\" placeholder=\"Example: 45\">\n\n\n<label>\nTemperature Correction Factor\n<\/label>\n\n<input id=\"factor\" type=\"number\" value=\"1.10\" step=\"0.01\">\n\n\n<button onclick=\"calculateSPD()\">\nCalculate Recommended DC SPD\n<\/button>\n\n\n<div id=\"result\" class=\"result-box\">\n<\/div>\n\n\n<\/div>\n\n\n<style>\n\n.spd-calculator{\n\nmax-width:600px;\npadding:30px;\nborder:1px solid #ddd;\nborder-radius:10px;\nbackground:#fafafa;\nfont-family:Arial, sans-serif;\n\n}\n\n\n.spd-calculator h2{\n\nmargin-bottom:15px;\n\n}\n\n\n.spd-calculator label{\n\ndisplay:block;\nmargin-top:15px;\nfont-weight:600;\n\n}\n\n\n.spd-calculator input{\n\nwidth:100%;\npadding:12px;\nmargin-top:8px;\nborder:1px solid #ccc;\nborder-radius:5px;\nfont-size:16px;\n\n}\n\n\n.spd-calculator button{\n\nmargin-top:25px;\npadding:14px 20px;\nbackground:#d71920;\ncolor:white;\nborder:none;\nborder-radius:5px;\nfont-size:16px;\ncursor:pointer;\n\n}\n\n\n.spd-calculator button:hover{\n\nopacity:0.85;\n\n}\n\n\n.result-box{\n\nmargin-top:25px;\npadding:20px;\nbackground:white;\nborder-left:4px solid #d71920;\nfont-size:16px;\nline-height:1.7;\n\n}\n\n\n<\/style>\n\n\n\n<script>\n\nfunction calculateSPD(){\n\n\nlet modules =\nparseFloat(document.getElementById(\"modules\").value);\n\n\nlet voc =\nparseFloat(document.getElementById(\"voc\").value);\n\n\nlet factor =\nparseFloat(document.getElementById(\"factor\").value);\n\n\n\nif(!modules || !voc || !factor){\n\ndocument.getElementById(\"result\").innerHTML =\n\"Please enter all required values.\";\n\nreturn;\n\n}\n\n\n\nlet voltage =\nmodules * voc * factor;\n\n\n\nlet recommendation=\"\";\n\n\nif(voltage <=600){\n\nrecommendation =\n\"600V DC SPD\";\n\n}\n\nelse if(voltage <=1000){\n\nrecommendation =\n\"1000V DC SPD\";\n\n}\n\nelse if(voltage <=1500){\n\nrecommendation =\n\"1500V DC SPD\";\n\n}\n\nelse{\n\nrecommendation =\n\"Please consult an engineer for higher voltage applications.\";\n\n}\n\n\n\ndocument.getElementById(\"result\").innerHTML =\n\n\"<strong>Maximum PV Voltage:<\/strong> \"\n+ voltage.toFixed(0)\n+ \" V DC\"\n+\n\n\"<br><br><strong>Recommended DC SPD Voltage:<\/strong> \"\n+ recommendation;\n\n\n}\n\n\n<\/script>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">600V DC SPD vs 1000V DC SPD vs 1500V DC SPD<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Voltage rating is only one factor in DC SPD selection. The SPD type should also be selected according to the surge environment. Learn more about <strong><a href=\"https:\/\/cnkuangya.com\/es\/blog\/type-1-vs-type-2-spd-for-solar\/\">Type 1, Type 2 and Type 1+2 DC SPD selection<\/a><\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Different PV system designs require different voltage-rated SPDs.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"819\" src=\"https:\/\/cnkuangya.com\/wp-content\/uploads\/2026\/08\/600V-DC-SPD-vs-1000V-DC-SPD-vs-1500V-DC-SPD-1024x819.jpg\" alt=\"600V 1000V and 1500V DC SPD comparison for solar PV systems\" class=\"wp-image-4360\" srcset=\"https:\/\/cnkuangya.com\/wp-content\/uploads\/2026\/08\/600V-DC-SPD-vs-1000V-DC-SPD-vs-1500V-DC-SPD-1024x819.jpg 1024w, https:\/\/cnkuangya.com\/wp-content\/uploads\/2026\/08\/600V-DC-SPD-vs-1000V-DC-SPD-vs-1500V-DC-SPD-300x240.jpg 300w, https:\/\/cnkuangya.com\/wp-content\/uploads\/2026\/08\/600V-DC-SPD-vs-1000V-DC-SPD-vs-1500V-DC-SPD-768x615.jpg 768w, https:\/\/cnkuangya.com\/wp-content\/uploads\/2026\/08\/600V-DC-SPD-vs-1000V-DC-SPD-vs-1500V-DC-SPD-15x12.jpg 15w, https:\/\/cnkuangya.com\/wp-content\/uploads\/2026\/08\/600V-DC-SPD-vs-1000V-DC-SPD-vs-1500V-DC-SPD-600x480.jpg 600w, https:\/\/cnkuangya.com\/wp-content\/uploads\/2026\/08\/600V-DC-SPD-vs-1000V-DC-SPD-vs-1500V-DC-SPD.jpg 1402w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">Different PV applications require different DC SPD voltage ratings.<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>SPD Voltage Rating<\/th><th>Aplicaciones comunes<\/th><th>Typical Systems<\/th><\/tr><\/thead><tbody><tr><td>SPD de 600V CC<\/td><td>Small PV installations<\/td><td>Residential rooftop systems<\/td><\/tr><tr><td>SPD de 1000V CC<\/td><td>Medium and large PV systems<\/td><td>Commercial and industrial projects<\/td><\/tr><tr><td>SPD de 1500V CC<\/td><td>Large-scale PV systems<\/td><td>Utility solar farms<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The correct selection depends on the calculated maximum PV voltage, not only the project size.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Real Application Examples<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">Example 1: Commercial Rooftop PV System<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">System information:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>PV modules in series: 22<\/li>\n\n\n\n<li>Module Voc: 42V<\/li>\n\n\n\n<li>Temperature correction factor: 1.10<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1lculo:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">22 \u00d7 42V \u00d7 1.10<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">= <strong>1016V DC<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Recommended selection:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>SPD de 1500V CC<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Raz\u00f3n:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">After temperature correction, the PV voltage exceeds 1000V.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Example 2: Industrial Solar Project<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">System information:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>PV modules in series: 18<\/li>\n\n\n\n<li>Module Voc: 45V<\/li>\n\n\n\n<li>Temperature correction factor: 1.10<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1lculo:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">18 \u00d7 45V \u00d7 1.10<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">= <strong>891V DC<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Recommended selection:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>SPD de 1000V CC<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Raz\u00f3n:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The calculated PV voltage is below 1000V.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Common Mistakes When Selecting DC SPD Voltage<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">1. Selecting SPD Based Only on Inverter Voltage<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The inverter input range does not always represent the maximum PV array voltage.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">SPD selection should be based on PV string voltage.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">2. Ignoring Module Voc<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Using Vmp instead of Voc may underestimate the maximum PV voltage.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">3. Choosing Higher Voltage Without Checking Up<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A higher voltage-rated SPD may not always provide better equipment protection.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The Up value should meet the protection requirements of the system.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">4. Ignoring Temperature Effects<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">PV module voltage increases at low temperatures.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Temperature correction should be considered during system design.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Preguntas frecuentes<\/h1>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">What voltage DC SPD do I need for a 1000V solar system?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A DC SPD with a suitable Ucpv rating should be selected based on the actual maximum PV system voltage. The calculated PV voltage should always remain below the SPD voltage rating.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Can I use a 1500V DC SPD on a 1000V solar system?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A 1500V DC SPD may be used in some applications, but the protection level (Up), system requirements and cost should also be considered.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Is a higher DC SPD voltage rating always better?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">No. The SPD voltage rating should match the PV system requirements. A higher voltage rating does not automatically provide better protection.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">How do I calculate PV system voltage for SPD selection?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Calculate the maximum PV voltage using:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Number of series modules \u00d7 Module Voc \u00d7 Temperature correction factor.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">What is Ucpv in a DC SPD?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Ucpv is the maximum continuous operating voltage that a photovoltaic SPD can withstand during normal operation.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">What standard applies to photovoltaic DC SPD?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Photovoltaic surge protective devices are mainly covered by:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><a href=\"https:\/\/webstore.iec.ch\/en\/publication\/26931\" rel=\"noopener\">IEC 61643-31<\/a>: Low-voltage surge protective devices \u2013 Requirements and test methods for SPDs for photovoltaic installations<\/strong>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Technical References<\/h1>\n\n\n\n<ul class=\"wp-block-list\">\n<li>IEC 61643-31: Surge protective devices connected to photovoltaic installations<\/li>\n\n\n\n<li>IEC 62548: Photovoltaic arrays \u2014 Design requirements<\/li>\n\n\n\n<li>IEC 60364-5-53: Low-voltage electrical installations protection requirements<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"819\" src=\"https:\/\/cnkuangya.com\/wp-content\/uploads\/2026\/08\/kuangya-dc-spd-solar-protection-solution-1024x819.jpg\" alt=\"KUANGYA DC SPD solution for solar PV protection\" class=\"wp-image-4361\" srcset=\"https:\/\/cnkuangya.com\/wp-content\/uploads\/2026\/08\/kuangya-dc-spd-solar-protection-solution-1024x819.jpg 1024w, https:\/\/cnkuangya.com\/wp-content\/uploads\/2026\/08\/kuangya-dc-spd-solar-protection-solution-300x240.jpg 300w, https:\/\/cnkuangya.com\/wp-content\/uploads\/2026\/08\/kuangya-dc-spd-solar-protection-solution-768x615.jpg 768w, https:\/\/cnkuangya.com\/wp-content\/uploads\/2026\/08\/kuangya-dc-spd-solar-protection-solution-15x12.jpg 15w, https:\/\/cnkuangya.com\/wp-content\/uploads\/2026\/08\/kuangya-dc-spd-solar-protection-solution-600x480.jpg 600w, https:\/\/cnkuangya.com\/wp-content\/uploads\/2026\/08\/kuangya-dc-spd-solar-protection-solution.jpg 1402w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">KUANGYA provides DC SPD solutions for solar photovoltaic applications.<\/figcaption><\/figure>\n\n\n\n<h1 class=\"wp-block-heading\">Conclusi\u00f3n<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Selecting the correct DC SPD voltage rating is essential for reliable solar PV system protection.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The correct choice depends on:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Tensi\u00f3n m\u00e1xima del sistema fotovoltaico<\/li>\n\n\n\n<li>Module Voc<\/li>\n\n\n\n<li>Temperature conditions<\/li>\n\n\n\n<li>Required protection level<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">For common photovoltaic applications:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Small PV systems often use 600V DC SPD<\/li>\n\n\n\n<li>Commercial PV systems commonly use 1000V DC SPD<\/li>\n\n\n\n<li>Utility-scale PV systems commonly use 1500V DC SPD<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">KUANGYA provides <a href=\"https:\/\/cnkuangya.com\/es\/dc-spd\/\">DC SPD solutions<\/a> for solar photovoltaic applications, including 600V, 1000V and 1500V DC models with OEM customization support.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Recursos relacionados<\/h1>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/cnkuangya.com\/es\/blog\/how-dc-spd-works-operating-principles-components-engineers-guide\/\">How a DC SPD Works: Operating Principles, Components and Engineer Guide<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/cnkuangya.com\/es\/blog\/type-1-vs-type-2-spd-for-solar\/\">Type 1 vs Type 2 vs Type 1+2 DC SPD for Solar PV<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/cnkuangya.com\/es\/blog\/how-to-size-a-dc-spd-for-a-solar-pv-array\/\">C\u00f3mo dimensionar un SPD de CC para un campo solar fotovoltaico<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/cnkuangya.com\/es\/blog\/dc-spd-for-solar-installations-in-spain\/\">SPD de CC para instalaciones solares en Espa\u00f1a: Gu\u00eda de 10 pasos<\/a><\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>A Practical Guide to Choosing 600V, 1000V and 1500V DC Surge Protective Devices Introduction DC SPD selection is one of the most important steps in designing a reliable solar photovoltaic (PV) protection system. Selecting the correct voltage rating of a DC Surge Protective Device (DC SPD) ensures reliable protection performance and long-term system stability. Many [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":4355,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[35],"tags":[],"class_list":["post-4354","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"blocksy_meta":[],"_links":{"self":[{"href":"https:\/\/cnkuangya.com\/es\/wp-json\/wp\/v2\/posts\/4354","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cnkuangya.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cnkuangya.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cnkuangya.com\/es\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/cnkuangya.com\/es\/wp-json\/wp\/v2\/comments?post=4354"}],"version-history":[{"count":1,"href":"https:\/\/cnkuangya.com\/es\/wp-json\/wp\/v2\/posts\/4354\/revisions"}],"predecessor-version":[{"id":4362,"href":"https:\/\/cnkuangya.com\/es\/wp-json\/wp\/v2\/posts\/4354\/revisions\/4362"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cnkuangya.com\/es\/wp-json\/wp\/v2\/media\/4355"}],"wp:attachment":[{"href":"https:\/\/cnkuangya.com\/es\/wp-json\/wp\/v2\/media?parent=4354"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cnkuangya.com\/es\/wp-json\/wp\/v2\/categories?post=4354"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cnkuangya.com\/es\/wp-json\/wp\/v2\/tags?post=4354"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}