{"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\/ja\/blog\/dc-spd-selection-guide\/","title":{"rendered":"\u592a\u967d\u5149\u767a\u96fb\u30b7\u30b9\u30c6\u30e0\u306b\u304a\u3051\u308b\u9069\u5207\u306aDC SPD\u96fb\u5727\u5b9a\u683c\u306e\u9078\u5b9a\u65b9\u6cd5"},"content":{"rendered":"<h2 class=\"wp-block-heading\">600V\u30011000V\u30011500V\u306eDC\u30b5\u30fc\u30b8\u9632\u8b77\u30c7\u30d0\u30a4\u30b9\uff08SPD\uff09\u9078\u5b9a\u306b\u95a2\u3059\u308b\u5b9f\u8df5\u30ac\u30a4\u30c9<\/h2>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u306f\u3058\u3081\u306b<\/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>DC SPD\u306e\u9078\u5b9a<\/strong> \u306f\u3001\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u592a\u967d\u5149\u767a\u96fb\uff08PV\uff09\u4fdd\u8b77\u30b7\u30b9\u30c6\u30e0\u3092\u8a2d\u8a08\u3059\u308b\u4e0a\u3067\u6700\u3082\u91cd\u8981\u306a\u30b9\u30c6\u30c3\u30d7\u306e\u4e00\u3064\u3067\u3059\u3002DC\u30b5\u30fc\u30b8\u9632\u8b77\u30c7\u30d0\u30a4\u30b9\uff08DC SPD\uff09\u306e\u9069\u5207\u306a\u96fb\u5727\u5b9a\u683c\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u3067\u3001\u78ba\u5b9f\u306a\u4fdd\u8b77\u6027\u80fd\u3068\u9577\u671f\u7684\u306a\u30b7\u30b9\u30c6\u30e0\u306e\u5b89\u5b9a\u6027\u304c\u78ba\u4fdd\u3055\u308c\u307e\u3059\u3002.<\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u591a\u304f\u306e\u30e6\u30fc\u30b6\u30fc\u306fSPD\u3092\u9078\u629e\u3059\u308b\u969b\u3001\u653e\u96fb\u96fb\u6d41\u5b9a\u683c\uff08kA\uff09\u306b\u4e3b\u306b\u6ce8\u76ee\u3057\u307e\u3059\u304c\u3001\u96fb\u5727\u5b9a\u683c\u3082\u540c\u69d8\u306b\u91cd\u8981\u3067\u3059\u3002\u9078\u629e\u3059\u308bDC SPD\u306f\u3001\u901a\u5e38\u306e\u52d5\u4f5c\u6761\u4ef6\u4e0b\u3067PV\u30b7\u30b9\u30c6\u30e0\u304c\u767a\u751f\u3055\u305b\u308b\u6700\u5927\u96fb\u5727\u306b\u8010\u3048\u3089\u308c\u308b\u3082\u306e\u3067\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u96fb\u5727\u5b9a\u683c\u304c\u4e0d\u5341\u5206\u306aSPD\u306f\u65e9\u671f\u306e\u52a3\u5316\u3084\u6545\u969c\u3092\u5f15\u304d\u8d77\u3053\u3059\u53ef\u80fd\u6027\u304c\u3042\u308a\u3001\u4e00\u65b9\u3067\u5fc5\u8981\u4ee5\u4e0a\u306b\u9ad8\u3044\u96fb\u5727\u5b9a\u683c\u306eSPD\u306f\u3001\u305d\u306e\u7528\u9014\u306b\u5bfe\u3057\u3066\u6700\u9069\u306a\u4fdd\u8b77\u30ec\u30d9\u30eb\u3092\u63d0\u4f9b\u3067\u304d\u306a\u3044\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u592a\u967d\u5149\u767a\u96fb\u30b7\u30b9\u30c6\u30e0\u306b\u304a\u3044\u3066\u3001\u91cd\u8981\u306a\u96fb\u5727\u30d1\u30e9\u30e1\u30fc\u30bf\u306f <strong>Ucpv\uff08\u592a\u967d\u5149\u767a\u96fb\u30b7\u30b9\u30c6\u30e0\u7528\u6700\u5927\u9023\u7d9a\u52d5\u4f5c\u96fb\u5727\uff09<\/strong>. \u6b63\u3057\u3044\u9078\u5b9a\u306b\u306f\u3001\u6700\u5927\u592a\u967d\u5149\u767a\u96fb\u30b7\u30b9\u30c6\u30e0\u96fb\u5727\u3001\u30e2\u30b8\u30e5\u30fc\u30eb\u958b\u653e\u96fb\u5727\uff08Voc\uff09\u3001\u304a\u3088\u3073\u6e29\u5ea6\u5f71\u97ff\u306e\u7406\u89e3\u304c\u5fc5\u8981\u3067\u3059\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u672c\u30ac\u30a4\u30c9\u3067\u306f\u3001\u4e00\u822c\u7684\u306a600V DC\u30011000V DC\u30011500V DC\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u542b\u3080\u3001\u592a\u967d\u5149\u767a\u96fb\u30b7\u30b9\u30c6\u30e0\u306b\u9069\u3057\u305fDC SPD\u96fb\u5727\u5b9a\u683c\u306e\u9078\u5b9a\u65b9\u6cd5\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">\u8981\u70b9<\/h1>\n\n\n\n<ul class=\"wp-block-list\">\n<li>DC SPD\u306e\u96fb\u5727\u9078\u5b9a\u306f\u3001\u30a4\u30f3\u30d0\u30fc\u30bf\u96fb\u5727\u3060\u3051\u3067\u306a\u304f\u3001\u6700\u5927\u592a\u967d\u5149\u767a\u96fb\u30b7\u30b9\u30c6\u30e0\u96fb\u5727\u306b\u57fa\u3065\u3044\u3066\u884c\u3046\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002.<\/li>\n\n\n\n<li>Ucpv\u306f\u3001\u592a\u967d\u5149\u767a\u96fb\u7528DC SPD\u306e\u96fb\u5727\u5b9a\u683c\u3092\u9078\u5b9a\u3059\u308b\u969b\u306e\u91cd\u8981\u306a\u30d1\u30e9\u30e1\u30fc\u30bf\u3067\u3059\u3002.<\/li>\n\n\n\n<li>\u592a\u967d\u5149\u767a\u96fb\u30b7\u30b9\u30c6\u30e0\u306e\u96fb\u5727\u8a08\u7b97\u3067\u306f\u3001\u30e2\u30b8\u30e5\u30fc\u30eb\u306eVoc\u3068\u6e29\u5ea6\u88dc\u6b63\u4fc2\u6570\u3092\u8003\u616e\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002.<\/li>\n\n\n\n<li>1000V DC SPD\u304a\u3088\u30731500V DC SPD\u306f\u3001\u305d\u308c\u305e\u308c\u7570\u306a\u308b\u592a\u967d\u5149\u767a\u96fb\u30b7\u30b9\u30c6\u30e0\u306e\u96fb\u5727\u30ec\u30d9\u30eb\u306b\u5408\u308f\u305b\u3066\u8a2d\u8a08\u3055\u308c\u3066\u3044\u307e\u3059\u3002.<\/li>\n\n\n\n<li>\u6b63\u3057\u3044SPD\u306e\u9078\u5b9a\u306f\u3001\u96fb\u5727\u5b9a\u683c\u3001\u4fdd\u8b77\u30ec\u30d9\u30eb\uff08Up\uff09\u3001\u304a\u3088\u3073\u30b7\u30b9\u30c6\u30e0\u8981\u4ef6\u306e\u30d0\u30e9\u30f3\u30b9\u3092\u8003\u616e\u3057\u3066\u884c\u3044\u307e\u3059\u3002.<\/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\">DC SPD\u306e\u96fb\u5727\u5b9a\u683c\u3068\u306f\u4f55\u3092\u610f\u5473\u3057\u307e\u3059\u304b\uff1f<\/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\">\u592a\u967d\u5149\u767a\u96fb\u4fdd\u8b77\u306b\u4f7f\u7528\u3055\u308c\u308bDC SPD\u306e\u4e3b\u8981\u306a\u5185\u90e8\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">DC SPD\u306e\u96fb\u5727\u5b9a\u683c\u306f\u3001SPD\u304c\u4fdd\u8b77\u6a5f\u80fd\u3092\u52d5\u4f5c\u3055\u305b\u308b\u3053\u3068\u306a\u304f\u7d99\u7d9a\u7684\u306b\u8010\u3048\u3089\u308c\u308b\u6700\u5927DC\u96fb\u5727\u3092\u793a\u3057\u307e\u3059\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u30b5\u30fc\u30b8\u767a\u751f\u6642\u306bDC SPD\u304c\u3069\u306e\u3088\u3046\u306b\u5fdc\u7b54\u3059\u308b\u304b\u3092\u7406\u89e3\u3059\u308b\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u30ac\u30a4\u30c9\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002 <strong><a href=\"https:\/\/cnkuangya.com\/ja\/%e3%83%96%e3%83%ad%e3%82%b0\/how-dc-spd-works-operating-principles-components-engineers-guide\/\">DC SPD\u306e\u4ed5\u7d44\u307f<\/a><\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u592a\u967d\u5149\u767a\u96fb\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u304a\u3044\u3066\u3001\u6700\u3082\u91cd\u8981\u306a\u96fb\u5727\u30d1\u30e9\u30e1\u30fc\u30bf\u306f\u6b21\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Ucpv \u2014 PV\u30b7\u30b9\u30c6\u30e0\u306b\u304a\u3051\u308b\u6700\u5927\u9023\u7d9a\u52d5\u4f5c\u96fb\u5727<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Ucpv\u306f\u3001\u901a\u5e38\u306ePV\u52d5\u4f5c\u4e2d\u306bSPD\u306b\u7d99\u7d9a\u7684\u306b\u5370\u52a0\u3067\u304d\u308b\u6700\u5927\u96fb\u5727\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u9078\u629e\u3055\u308c\u308bUcpv\u306f\u4ee5\u4e0b\u306e\u6761\u4ef6\u3092\u6e80\u305f\u3059\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6700\u5927PV\u30b7\u30b9\u30c6\u30e0\u96fb\u5727\u4ee5\u4e0a\u3067\u3042\u308b\u3053\u3068<\/li>\n\n\n\n<li>PV\u30b7\u30b9\u30c6\u30e0\u306e\u69cb\u6210\u306b\u9069\u3057\u3066\u3044\u308b\u3053\u3068<\/li>\n\n\n\n<li>\u5fc5\u8981\u306a\u4fdd\u8b77\u30ec\u30d9\u30eb\u3068\u4e92\u63db\u6027\u304c\u3042\u308b\u3053\u3068<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f8b\u3048\u3070\u3001\u3053\u3046\u3060\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>DC SPD\u5b9a\u683c<\/th><th>\u4e00\u822c\u7684\u306a\u7528\u9014<\/th><\/tr><\/thead><tbody><tr><td>600V DC SPD<\/td><td>\u5c0f\u898f\u6a21PV\u30b7\u30b9\u30c6\u30e0<\/td><\/tr><tr><td>1000V DC SPD<\/td><td>\u5546\u696d\u7528\u304a\u3088\u3073\u7523\u696d\u7528\u592a\u967d\u5149\u767a\u96fb\u30b7\u30b9\u30c6\u30e0<\/td><\/tr><tr><td>1500V DC SPD<\/td><td>\u516c\u76ca\u4e8b\u696d\u898f\u6a21\u304a\u3088\u3073\u5927\u898f\u6a21\u592a\u967d\u5149\u767a\u96fb\u30d7\u30ed\u30b8\u30a7\u30af\u30c8<\/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\">Ucpv\u306f\u3001\u592a\u967d\u5149\u767a\u96fb\u30b7\u30b9\u30c6\u30e0\u306e\u6700\u5927\u96fb\u5727\u306b\u57fa\u3065\u3044\u3066\u9078\u629e\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u592a\u967d\u5149\u767a\u96fb\u30b7\u30b9\u30c6\u30e0\u96fb\u5727\u306b\u57fa\u3065\u304fDC SPD\u306e\u9078\u5b9a<\/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\">DC SPD\u306e\u9078\u5b9a\u306f\u3001\u592a\u967d\u5149\u767a\u96fb\u30b7\u30b9\u30c6\u30e0\u306e\u6700\u5927\u96fb\u5727\u3001\u30e2\u30b8\u30e5\u30fc\u30eb\u7279\u6027\u3001\u6e29\u5ea6\u6761\u4ef6\u3001\u304a\u3088\u3073\u8a2d\u7f6e\u8981\u4ef6\u306b\u4f9d\u5b58\u3057\u307e\u3059\u3002\u9069\u5207\u306a\u96fb\u5727\u5b9a\u683c\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u304c\u3001\u6700\u7d42\u7684\u306aSPD\u30e2\u30c7\u30eb\u3092\u6c7a\u5b9a\u3059\u308b\u524d\u306e\u6700\u521d\u306e\u30b9\u30c6\u30c3\u30d7\u3068\u306a\u308a\u307e\u3059\u3002.<\/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\">DC SPD\u306e\u9078\u5b9a\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u4e3b\u306a\u8981\u56e0\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\uff1a<\/p>\n<\/blockquote>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6700\u5927PV\u30b7\u30b9\u30c6\u30e0\u96fb\u5727<\/li>\n\n\n\n<li>\u30e2\u30b8\u30e5\u30fc\u30eb\u958b\u653e\u96fb\u5727 (Voc)<\/li>\n\n\n\n<li>\u6e29\u5ea6\u88dc\u6b63\u4fc2\u6570<\/li>\n\n\n\n<li>\u5fc5\u8981\u4fdd\u8b77\u30ec\u30d9\u30eb (Up)<\/li>\n\n\n\n<li>\u8a2d\u7f6e\u74b0\u5883<\/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\">DC SPD\u306e\u9078\u5b9a\uff1a\u96fb\u5727\u5b9a\u683c\u304c\u91cd\u8981\u306a\u7406\u7531<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0d\u9069\u5207\u306a\u96fb\u5727\u5b9a\u683c\u306e\u9078\u629e\u306f\u3001\u30b7\u30b9\u30c6\u30e0\u306e\u4fe1\u983c\u6027\u3068\u4fdd\u8b77\u6027\u80fd\u306b\u5f71\u97ff\u3092\u53ca\u307c\u3059\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002.<\/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\">\u6b63\u3057\u3044DC SPD\u96fb\u5727\u5b9a\u683c\u3092\u9078\u629e\u3059\u308b\u305f\u3081\u306e\u4f53\u7cfb\u7684\u306a\u30a2\u30d7\u30ed\u30fc\u30c1.<\/figcaption><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u96fb\u5727\u5b9a\u683c\u304c\u4f4e\u3059\u304e\u308bSPD\u306e\u9078\u629e<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f8b<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">PV\u30b7\u30b9\u30c6\u30e0\u306e\u6700\u5927\u96fb\u5727\u306f1200V DC\u306b\u8fd1\u3044\u304c\u30011000V DC\u306eSPD\u304c\u8a2d\u7f6e\u3055\u308c\u3066\u3044\u308b\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6f5c\u5728\u7684\u306a\u554f\u984c\u70b9\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>SPD\u304c\u610f\u56f3\u3055\u308c\u305f\u96fb\u5727\u7bc4\u56f2\u3092\u8d85\u3048\u3066\u52d5\u4f5c\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002.<\/li>\n\n\n\n<li>\u5185\u90e8\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e\u52a3\u5316\u304c\u65e9\u307e\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002.<\/li>\n\n\n\n<li>\u4fdd\u8b77\u306e\u4fe1\u983c\u6027\u304c\u4f4e\u4e0b\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">SPD\u306e\u5b9a\u683c\u96fb\u5727\u306f\u3001\u8a08\u7b97\u3055\u308c\u305f\u6700\u5927PV\u30b7\u30b9\u30c6\u30e0\u96fb\u5727\u3092\u4e0b\u56de\u3063\u3066\u306f\u306a\u308a\u307e\u305b\u3093\u3002.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u904e\u5ea6\u306b\u9ad8\u3044\u5b9a\u683c\u96fb\u5727\u3092\u6301\u3064SPD\u306e\u9078\u5b9a<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f8b<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">600V\u306ePV\u30b7\u30b9\u30c6\u30e0\u30671500V DC\u306eSPD\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">SPD\u306f\u305d\u306e\u96fb\u5727\u306b\u8010\u3048\u3089\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u5e38\u306b\u6700\u9069\u306a\u4fdd\u8b77\u3092\u63d0\u4f9b\u3067\u304d\u308b\u3068\u306f\u9650\u308a\u307e\u305b\u3093\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3088\u308a\u9ad8\u3044\u5b9a\u683c\u96fb\u5727\u306eSPD\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u7279\u6027\u304c\u3042\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u3088\u308a\u9ad8\u3044\u4fdd\u8b77\u96fb\u5727\u30ec\u30d9\u30eb (Up)<\/li>\n\n\n\n<li>\u7e4a\u7d30\u306a\u6a5f\u5668\u306b\u5bfe\u3059\u308b\u3088\u308a\u4f4e\u3044\u4fdd\u8b77\u30de\u30fc\u30b8\u30f3<\/li>\n\n\n\n<li>\u3088\u308a\u9ad8\u3044\u88fd\u54c1\u30b3\u30b9\u30c8<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u76ee\u6a19\u306f\u6700\u9ad8\u96fb\u5727\u5b9a\u683c\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u3067\u306f\u306a\u304f\u3001\u9069\u5207\u306a\u96fb\u5727\u5b9a\u683c\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u3067\u3042\u308b\u3002.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Ucpv\u3001Uc\u3001\u304a\u3088\u3073Up\u306e\u7406\u89e3<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">DC SPD\u3092\u9078\u629e\u3059\u308b\u969b\u3001\u3044\u304f\u3064\u304b\u306e\u96fb\u5727\u30d1\u30e9\u30e1\u30fc\u30bf\u304c\u4e00\u822c\u7684\u306b\u4f7f\u7528\u3055\u308c\u308b\u3002.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Ucpv\uff08\u592a\u967d\u5149\u767a\u96fb\u30b7\u30b9\u30c6\u30e0\u7528\u6700\u5927\u9023\u7d9a\u52d5\u4f5c\u96fb\u5727\uff09<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Ucpv\u306f\u3001\u592a\u967d\u5149\u767a\u96fb\u7528DC SPD\u306e\u9078\u5b9a\u306b\u304a\u3044\u3066\u6700\u3082\u91cd\u8981\u306a\u30d1\u30e9\u30e1\u30fc\u30bf\u3067\u3042\u308b\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u308c\u306f\u3001SPD\u304cPV\u30b7\u30b9\u30c6\u30e0\u5185\u3067\u7d99\u7d9a\u7684\u306b\u8010\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u6700\u5927\u96fb\u5727\u3092\u8868\u3059\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u9078\u629e\u3055\u308c\u308bUcpv\u306f\u3001PV\u30b7\u30b9\u30c6\u30e0\u306e\u6700\u5927\u96fb\u5727\u3088\u308a\u3082\u9ad8\u3044\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Uc\uff08\u6700\u5927\u9023\u7d9a\u52d5\u4f5c\u96fb\u5727\uff09<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Uc\u306f\u3001\u4e00\u822c\u7684\u306a\u30b5\u30fc\u30b8\u9632\u8b77\u30c7\u30d0\u30a4\u30b9\uff08SPD\uff09\u306b\u4e00\u822c\u7684\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">PV\u5c02\u7528\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u3001\u592a\u967d\u5149\u767a\u96fb\u30b7\u30b9\u30c6\u30e0\u304c\u72ec\u81ea\u306eDC\u96fb\u5727\u7279\u6027\u3092\u6301\u3064\u305f\u3081\u3001\u901a\u5e38Ucpv\u304c\u91cd\u8981\u306a\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u306a\u308a\u307e\u3059\u3002.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u30a2\u30c3\u30d7\uff08\u96fb\u5727\u4fdd\u8b77\u30ec\u30d9\u30eb\uff09<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Up\u306f\u3001\u30b5\u30fc\u30b8\u767a\u751f\u6642\u306b\u4fdd\u8b77\u5bfe\u8c61\u6a5f\u5668\u306e\u4e21\u7aef\u306b\u73fe\u308c\u308b\u53ef\u80fd\u6027\u306e\u3042\u308b\u6700\u5927\u96fb\u5727\u3092\u8868\u3057\u307e\u3059\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e00\u822c\u7684\u306b\u3001Up\u304c\u4f4e\u3044\u307b\u3069\u4fdd\u8b77\u6027\u80fd\u306f\u512a\u308c\u3066\u3044\u308b\u3053\u3068\u3092\u610f\u5473\u3057\u307e\u3059\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">SPD\u3092\u9078\u5b9a\u3059\u308b\u969b\u306f\u3001Ucpv\u3068Up\u306e\u4e21\u65b9\u3092\u8003\u616e\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">PV\u30b7\u30b9\u30c6\u30e0\u6700\u5927\u96fb\u5727\u306e\u8a08\u7b97\u65b9\u6cd5<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">PV\u30b7\u30b9\u30c6\u30e0\u306e\u6700\u5927\u96fb\u5727\u306f\u3001\u4ee5\u4e0b\u306b\u57fa\u3065\u3044\u3066\u8a08\u7b97\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u76f4\u5217\u63a5\u7d9a\u3055\u308c\u308bPV\u30e2\u30b8\u30e5\u30fc\u30eb\u306e\u679a\u6570<\/li>\n\n\n\n<li>\u30e2\u30b8\u30e5\u30fc\u30eb\u958b\u653e\u96fb\u5727 (Voc)<\/li>\n\n\n\n<li>\u6e29\u5ea6\u88dc\u6b63\u4fc2\u6570<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u8a08\u7b97\u5f0f\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\uff1a<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u6700\u5927PV\u96fb\u5727 = \u76f4\u5217\u30e2\u30b8\u30e5\u30fc\u30eb\u679a\u6570 \u00d7 \u30e2\u30b8\u30e5\u30fc\u30eb\u958b\u653e\u96fb\u5727(Voc) \u00d7 \u6e29\u5ea6\u88dc\u6b63\u4fc2\u6570<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u3069\u3053\u3067\u3060\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u30d1\u30e9\u30e1\u30fc\u30bf<\/th><th>\u8aac\u660e<\/th><\/tr><\/thead><tbody><tr><td>\u76f4\u5217\u30e2\u30b8\u30e5\u30fc\u30eb\u679a\u6570<\/td><td>1\u30b9\u30c8\u30ea\u30f3\u30b0\u3042\u305f\u308a\u306b\u76f4\u5217\u63a5\u7d9a\u3055\u308c\u308bPV\u30e2\u30b8\u30e5\u30fc\u30eb\u306e\u5408\u8a08\u679a\u6570<\/td><\/tr><tr><td>\u30f4\u30a9\u30c3\u30af<\/td><td>PV\u30e2\u30b8\u30e5\u30fc\u30eb1\u679a\u3042\u305f\u308a\u306e\u958b\u653e\u96fb\u5727<\/td><\/tr><tr><td>\u6e29\u5ea6\u88dc\u6b63\u4fc2\u6570<\/td><td>\u4f4e\u6e29\u6761\u4ef6\u3092\u8003\u616e\u3057\u305f\u96fb\u5727\u8abf\u6574\u4fc2\u6570<\/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\">\u8a08\u7b97\u4f8b<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">PV\u30b9\u30c8\u30ea\u30f3\u30b0\u306e\u5185\u5bb9\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u76f4\u5217\u63a5\u7d9a\u3055\u308c\u305f\u30e2\u30b8\u30e5\u30fc\u30eb\u6570\uff1a <strong>24<\/strong><\/li>\n\n\n\n<li>\u30e2\u30b8\u30e5\u30fc\u30eb\u958b\u653e\u96fb\u5727\uff08Voc\uff09\uff1a <strong>45V<\/strong><\/li>\n\n\n\n<li>\u6e29\u5ea6\u88dc\u6b63\u4fc2\u6570\uff1a <strong>1.10<\/strong><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u8a08\u7b97\uff1a<\/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\">\u6700\u5927PV\u30b7\u30b9\u30c6\u30e0\u96fb\u5727\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>1188V DC<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3057\u305f\u304c\u3063\u3066\u3001 <strong>1500V DC SPD<\/strong> \u5341\u5206\u306a\u96fb\u5727\u30de\u30fc\u30b8\u30f3\u3092\u78ba\u4fdd\u3059\u308b\u305f\u3081\u306b\u9078\u629e\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u96fb\u5727\u8a08\u7b97\u306f\u3001DC SPD\u9078\u5b9a\u306e\u6700\u521d\u306e\u30b9\u30c6\u30c3\u30d7\u3067\u3059\u3002\u96fb\u6d41\u5b9a\u683c\u3084\u4fdd\u8b77\u8981\u4ef6\u3092\u542b\u3080\u5b8c\u5168\u306a\u30b5\u30a4\u30b8\u30f3\u30b0\u624b\u6cd5\u306b\u3064\u3044\u3066\u306f\u3001\u5f53\u793e\u306e\u30ac\u30a4\u30c9\u3092\u53c2\u7167\u3057\u3066\u304f\u3060\u3055\u3044\u3002 <strong><a href=\"https:\/\/cnkuangya.com\/ja\/%e3%83%96%e3%83%ad%e3%82%b0\/how-to-size-a-dc-spd-for-a-solar-pv-array\/\">\u592a\u967d\u5149\u767a\u96fb\u30a2\u30ec\u30a4\u7528DC SPD\u306e\u9078\u5b9a\u65b9\u6cd5<\/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\">\u91cd\u8981\u306a\u304a\u77e5\u3089\u305b<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u9078\u629e\u3059\u308bDC SPD\u306e\u96fb\u5727\u5b9a\u683c\u306f\u3001\u8a08\u7b97\u3055\u308c\u305f\u6700\u5927PV\u30b7\u30b9\u30c6\u30e0\u96fb\u5727\u3092\u4e0b\u56de\u3063\u3066\u306f\u306a\u308a\u307e\u305b\u3093\u3002.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u592a\u967d\u5149\u767a\u96fb\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u304a\u3044\u3066\u3001SPD\u306e\u30d1\u30e9\u30e1\u30fc\u30bf <strong>Ucpv<\/strong> \u306f\u3001\u8a08\u7b97\u3055\u308c\u305f\u6700\u5927PV\u96fb\u5727\u4ee5\u4e0a\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002.<\/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\">\u6700\u5927PV\u96fb\u5727\u306e\u8a08\u7b97\u306f\u3001\u9069\u5207\u306aDC SPD\u5b9a\u683c\u3092\u6c7a\u5b9a\u3059\u308b\u306e\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002.<\/figcaption><\/figure>\n\n\n\n<h1 class=\"wp-block-heading\">DC SPD\u96fb\u5727\u9078\u5b9a\u8a08\u7b97\u30c4\u30fc\u30eb<\/h1>\n\n\n\n<div class=\"spd-calculator\">\n\n<h2>\u592a\u967d\u5149\u767a\u96fb\u7528DC SPD\u96fb\u5727\u8a08\u7b97\u30c4\u30fc\u30eb<\/h2>\n\n<p>\nPV\u30b7\u30b9\u30c6\u30e0\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u306b\u57fa\u3065\u304d\u3001\u63a8\u5968\u3055\u308c\u308bDC SPD\u306e\u96fb\u5727\u5b9a\u683c\u3092\u8a08\u7b97\u3057\u307e\u3059\u3002.\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>\n\u6e29\u5ea6\u88dc\u6b63\u4fc2\u6570\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\/ja\/%e3%83%96%e3%83%ad%e3%82%b0\/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>\u4e00\u822c\u7684\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3<\/th><th>Typical Systems<\/th><\/tr><\/thead><tbody><tr><td>600V DC SPD<\/td><td>Small PV installations<\/td><td>Residential rooftop systems<\/td><\/tr><tr><td>1000V DC SPD<\/td><td>Medium and large PV systems<\/td><td>Commercial and industrial projects<\/td><\/tr><tr><td>1500V DC SPD<\/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\">\u8a08\u7b97\uff1a<\/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>1500V DC SPD<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7406\u7531<\/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\">\u8a08\u7b97\uff1a<\/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>1000V DC SPD<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7406\u7531<\/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\">\u3088\u304f\u3042\u308b\u8cea\u554f<\/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\">\u7d50\u8ad6<\/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>\u6700\u5927PV\u30b7\u30b9\u30c6\u30e0\u96fb\u5727<\/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\/ja\/%e7%9b%b4%e6%b5%81%e5%9b%9e%e8%bb%a2%e6%95%b0\/\">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\">\u95a2\u9023\u30ea\u30bd\u30fc\u30b9<\/h1>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/cnkuangya.com\/ja\/%e3%83%96%e3%83%ad%e3%82%b0\/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\/ja\/%e3%83%96%e3%83%ad%e3%82%b0\/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\/ja\/%e3%83%96%e3%83%ad%e3%82%b0\/how-to-size-a-dc-spd-for-a-solar-pv-array\/\">\u592a\u967d\u5149\u767a\u96fb\u30a2\u30ec\u30a4\u7528\u76f4\u6d41SPD\u306e\u30b5\u30a4\u30ba\u6c7a\u5b9a\u65b9\u6cd5<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/cnkuangya.com\/ja\/%e3%83%96%e3%83%ad%e3%82%b0\/dc-spd-for-solar-installations-in-spain\/\">\u30b9\u30da\u30a4\u30f3\u306e\u592a\u967d\u5149\u767a\u96fb\u8a2d\u5099\u5411\u3051DC SPD\uff1a10\u30b9\u30c6\u30c3\u30d7\u30ac\u30a4\u30c9<\/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 users focus mainly on the discharge current rating (kA) when choosing an SPD, but the voltage rating is equally critical. The selected DC SPD must be able to withstand the maximum possible voltage generated by the PV system under normal operating conditions. An SPD with an insufficient voltage rating may experience premature degradation or failure, [&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\/ja\/wp-json\/wp\/v2\/posts\/4354","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cnkuangya.com\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cnkuangya.com\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cnkuangya.com\/ja\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/cnkuangya.com\/ja\/wp-json\/wp\/v2\/comments?post=4354"}],"version-history":[{"count":1,"href":"https:\/\/cnkuangya.com\/ja\/wp-json\/wp\/v2\/posts\/4354\/revisions"}],"predecessor-version":[{"id":4362,"href":"https:\/\/cnkuangya.com\/ja\/wp-json\/wp\/v2\/posts\/4354\/revisions\/4362"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cnkuangya.com\/ja\/wp-json\/wp\/v2\/media\/4355"}],"wp:attachment":[{"href":"https:\/\/cnkuangya.com\/ja\/wp-json\/wp\/v2\/media?parent=4354"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cnkuangya.com\/ja\/wp-json\/wp\/v2\/categories?post=4354"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cnkuangya.com\/ja\/wp-json\/wp\/v2\/tags?post=4354"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}