{"id":4376,"date":"2026-09-01T10:44:59","date_gmt":"2026-09-01T02:44:59","guid":{"rendered":"https:\/\/cnkuangya.com\/?p=4376"},"modified":"2026-09-01T10:45:03","modified_gmt":"2026-09-01T02:45:03","slug":"dc-spd-class-i-class-ii-and-class-iii-explained-a-practical-guide-to-pv-surge-protection","status":"publish","type":"post","link":"https:\/\/cnkuangya.com\/ja\/blog\/dc-spd-class-i-class-ii-and-class-iii-explained-a-practical-guide-to-pv-surge-protection\/","title":{"rendered":"DC SPD \u30af\u30e9\u30b9I\u3001\u30af\u30e9\u30b9II\u3001\u30af\u30e9\u30b9III\u306e\u89e3\u8aac\uff1a\u592a\u967d\u5149\u767a\u96fb\uff08PV\uff09\u30b5\u30fc\u30b8\u4fdd\u8b77\u306e\u5b9f\u8df5\u30ac\u30a4\u30c9"},"content":{"rendered":"<h2>\u30af\u30e9\u30b9I\u3001\u30af\u30e9\u30b9II\u3001\u30af\u30e9\u30b9III\u30b5\u30fc\u30b8\u9632\u8b77\u30c7\u30d0\u30a4\u30b9\uff08SPD\uff09\u306e\u5b9f\u8df5\u30ac\u30a4\u30c9<\/h2>\n<p><a href=\"https:\/\/cnkuangya.com\/ja\/%e7%9b%b4%e6%b5%81%e5%9b%9e%e8%bb%a2%e6%95%b0\/\">DC\u30b5\u30fc\u30b8\u4fdd\u8b77\u30c7\u30d0\u30a4\u30b9\uff08SPD\uff09<\/a> \u592a\u967d\u5149\u767a\u96fb\u30b7\u30b9\u30c6\u30e0\u306eDC\u5074\u306b\u4f7f\u7528\u3055\u308c\u3001\u30a4\u30f3\u30d0\u30fc\u30bf\u3001\u76e3\u8996\u88c5\u7f6e\u3001\u63a5\u7d9a\u7bb1\u3001\u305d\u306e\u4ed6\u306e\u7cbe\u5bc6\u6a5f\u5668\u304c\u640d\u50b7\u3059\u308b\u524d\u306b\u3001\u904e\u6e21\u904e\u96fb\u5727\u3092\u5236\u9650\u3057\u3001\u30b5\u30fc\u30b8\u96fb\u6d41\u3092\u9003\u304c\u3059\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u8868\u8a18\u306f <strong>\u30af\u30e9\u30b9I<\/strong>, <strong>\u30af\u30e9\u30b9II<\/strong>, <strong>\u3067<\/strong>, <strong>\u30a2\u30a4\u30de\u30c3\u30af\u30b9<\/strong>, <strong>\u4e0a\u3078<\/strong> \u305d\u3057\u3066 <strong>Iscpv<\/strong> \u3057\u3070\u3057\u3070\u8aa4\u89e3\u3055\u308c\u3066\u3044\u307e\u3059\u3002.<\/p>\n<p>\u672c\u30ac\u30a4\u30c9\u3067\u306f\u3001DC SPD\u306e\u30af\u30e9\u30b9\uff08\u30af\u30e9\u30b9I\u3001\u30af\u30e9\u30b9II\u3001\u30af\u30e9\u30b9III\uff09\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u3001\u4e00\u822c\u7684\u306a1000V DC\u592a\u967d\u5149\u767a\u96fb\u7528SPD\u306e\u9298\u677f\u306e\u8aad\u307f\u65b9\u3092\u793a\u3057\u307e\u3059\u3002.<\/p>\n<hr \/>\n<h2>\u8981\u70b9<\/h2>\n<ul>\n<li>\u30af\u30e9\u30b9I\u3001\u30af\u30e9\u30b9II\u3001\u30af\u30e9\u30b9III\u306fSPD\u306e\u8a66\u9a13\u30af\u30e9\u30b9\u3092\u8868\u3059\u3082\u306e\u3067\u3042\u308a\u3001\u88fd\u54c1\u306e\u54c1\u8cea\u7b49\u7d1a\u3092\u793a\u3059\u3082\u306e\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002.<\/li>\n<li>\u30af\u30e9\u30b9I\u306f\u4e00\u822c\u7684\u306b\u30bf\u30a4\u30d71 SPD\u304a\u3088\u307310\/350\u03bcs\u306e\u96f7\u30a4\u30f3\u30d1\u30eb\u30b9\u96fb\u6d41\u6ce2\u5f62\u306b\u95a2\u9023\u4ed8\u3051\u3089\u308c\u307e\u3059\u3002.<\/li>\n<li>\u30af\u30e9\u30b9II\u306f\u4e00\u822c\u7684\u306b\u30bf\u30a4\u30d72 SPD\u304a\u3088\u30738\/20\u03bcs\u306e\u30b5\u30fc\u30b8\u96fb\u6d41\u6ce2\u5f62\u306b\u95a2\u9023\u4ed8\u3051\u3089\u308c\u307e\u3059\u3002.<\/li>\n<li>\u30af\u30e9\u30b9III\u306f\u4e00\u822c\u7684\u306b\u3001\u30bf\u30a4\u30d73\u306e\u7cbe\u5bc6\u4fdd\u8b77\u304a\u3088\u3073\u30b3\u30f3\u30d3\u30cd\u30fc\u30b7\u30e7\u30f3\u30a6\u30a7\u30fc\u30d6\u8a66\u9a13\u306b\u95a2\u9023\u4ed8\u3051\u3089\u308c\u307e\u3059\u3002.<\/li>\n<li>Ucpv\u3001In\u3001Imax\u3001Up\u3001\u304a\u3088\u3073Iscpv\u306f\u305d\u308c\u305e\u308c\u7570\u306a\u308b\u96fb\u6c17\u7684\u7279\u6027\u3092\u8868\u3057\u3066\u304a\u308a\u3001\u4e92\u63db\u6027\u306f\u3042\u308a\u307e\u305b\u3093\u3002.<\/li>\n<li>\u30af\u30e9\u30b9II\u306eSPD\u306f\u3001\u76f4\u6483\u96f7\u96fb\u6d41\u306b\u5bfe\u3059\u308b\u4fdd\u8b77\u3068\u3057\u3066\u81ea\u52d5\u7684\u306b\u898b\u306a\u3055\u308c\u308b\u3079\u304d\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002.<\/li>\n<\/ul>\n<figure><img decoding=\"async\" src=\"https:\/\/cnkuangya.com\/wp-content\/uploads\/2026\/08\/spd-class-comparison-line-drawing.png\" alt=\"Line drawing comparing Class I, Class II and Class III DC SPD test waveforms and protection stages\" \/><figcaption>\u30af\u30e9\u30b9I\u3001\u30af\u30e9\u30b9II\u3001\u304a\u3088\u3073\u30af\u30e9\u30b9III\u306eSPD\u306f\u3001\u305d\u308c\u305e\u308c\u7570\u306a\u308b\u30b5\u30fc\u30b8\u74b0\u5883\u304a\u3088\u3073\u8a2d\u7f6e\u6bb5\u968e\u306b\u5bfe\u3057\u3066\u8a66\u9a13\u3055\u308c\u307e\u3059\u3002.<\/figcaption><\/figure>\n<hr \/>\n<h2>SPD\u306e\u30af\u30e9\u30b9\u3068\u306f\u4f55\u3092\u610f\u5473\u3059\u308b\u306e\u304b\uff1f<\/h2>\n<p>\u300c\u30af\u30e9\u30b9\u300d\u3068\u3044\u3046\u8a00\u8449 <strong>\u30af\u30e9\u30b9<\/strong> SPD\u306b\u304a\u3051\u308b\u300c\u30af\u30e9\u30b9\u300d\u306f\u3001\u901a\u5e38\u3001\u8a66\u9a13\u5206\u985e\u3092\u6307\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u30af\u30e9\u30b9I\u304c\u6700\u9ad8\u54c1\u8cea\u306e\u88fd\u54c1\u3067\u3042\u308a\u3001\u30af\u30e9\u30b9II\u304c\u4f4e\u54c1\u8cea\u306e\u88fd\u54c1\u3067\u3042\u308b\u3053\u3068\u3092\u610f\u5473\u3059\u308b\u3082\u306e\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u307e\u305f\u3001\u7d76\u7e01\u30af\u30e9\u30b9\u3084IP\u4fdd\u8b77\u7b49\u7d1a\u3092\u8868\u3059\u3082\u306e\u3067\u3082\u3042\u308a\u307e\u305b\u3093\u3002.<\/p>\n<table>\n<thead>\n<tr>\n<th>\u8a66\u9a13\u30af\u30e9\u30b9<\/th>\n<th>\u4e00\u822c\u7684\u306a\u88fd\u54c1\u540d\u79f0<\/th>\n<th>\u4e3b\u306a\u8a66\u9a13\u6ce2\u5f62<\/th>\n<th>\u4ee3\u8868\u7684\u306a\u5f79\u5272<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u30af\u30e9\u30b9I<\/td>\n<td>\u30bf\u30a4\u30d71<\/td>\n<td>10\/350 \u03bcs \u96fb\u6d41\u30a4\u30f3\u30d1\u30eb\u30b9<\/td>\n<td>\u90e8\u5206\u96f7\u96fb\u6d41\u653e\u96fb<\/td>\n<\/tr>\n<tr>\n<td>\u30af\u30e9\u30b9II<\/td>\n<td>\u30bf\u30a4\u30d72<\/td>\n<td>8\/20 \u03bcs \u96fb\u6d41\u30a4\u30f3\u30d1\u30eb\u30b9<\/td>\n<td>\u8a98\u5c0e\u96f7\u304a\u3088\u3073\u958b\u9589\u30b5\u30fc\u30b8<\/td>\n<\/tr>\n<tr>\n<td>\u30af\u30e9\u30b9III<\/td>\n<td>\u30bf\u30a4\u30d73<\/td>\n<td>\u8907\u5408\u6ce2<\/td>\n<td>\u654f\u611f\u6a5f\u5668\u8fd1\u508d\u306e\u7cbe\u5bc6\u4fdd\u8b77<\/td>\n<\/tr>\n<tr>\n<td>\u30af\u30e9\u30b9I+II<\/td>\n<td>\u30bf\u30a4\u30d71+2<\/td>\n<td>10\/350 \u03bcs\u304a\u3088\u30738\/20 \u03bcs<\/td>\n<td>\u96f7\u96fb\u6d41\u304a\u3088\u3073\u30b5\u30fc\u30b8\u4fdd\u8b77\u306e\u8907\u5408\u578b<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u3053\u308c\u3089\u306eSPD\u30af\u30e9\u30b9\u3092\u3001\u96f7\u4fdd\u8b77\u30b7\u30b9\u30c6\u30e0\uff08LPS\uff09\u306e\u30af\u30e9\u30b9I\u3001II\u3001III\u3001IV\u3068\u6df7\u540c\u3057\u3066\u306f\u306a\u3089\u306a\u3044\u3002\u4e21\u30b7\u30b9\u30c6\u30e0\u306f\u985e\u4f3c\u3057\u305f\u30ed\u30fc\u30de\u6570\u5b57\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u304c\u3001\u5bfe\u8c61\u3068\u3059\u308b\u4e8b\u8c61\u306f\u7570\u306a\u308b\u3002.<\/p>\n<h2>\u30af\u30e9\u30b9I \/ \u30bf\u30a4\u30d71 DC SPD<\/h2>\n<p>\u30af\u30e9\u30b9I\u307e\u305f\u306f\u30bf\u30a4\u30d71 SPD\u306f\u3001\u9ad8\u30a8\u30cd\u30eb\u30ae\u30fc\u306e\u96f7\u96fb\u6d41\u6210\u5206\u3092\u51e6\u7406\u3059\u308b\u3088\u3046\u306b\u8a2d\u8a08\u3055\u308c\u3066\u3044\u308b\u3002\u305d\u306e\u4e3b\u8981\u306a\u8a66\u9a13\u6ce2\u5f62\u306f\u901a\u5e3810\/350 \u03bcs\u3067\u3042\u308a\u3001\u96fb\u6d41\u304c\u6025\u901f\u306b\u7acb\u3061\u4e0a\u304c\u3063\u305f\u5f8c\u3001\u6bd4\u8f03\u7684\u9577\u3044\u6642\u9593\u3092\u304b\u3051\u3066\u6e1b\u8870\u3059\u308b\u305f\u3081\u3001\u540c\u3058\u30d4\u30fc\u30af\u96fb\u6d41\u306e\u4e00\u822c\u7684\u306a8\/20 \u03bcs\u30b5\u30fc\u30b8\u3088\u308a\u3082\u30a4\u30f3\u30d1\u30eb\u30b9\u30a8\u30cd\u30eb\u30ae\u30fc\u304c\u5927\u5e45\u306b\u9ad8\u304f\u306a\u308b\u3002.<\/p>\n<p>\u592a\u967d\u5149\u767a\u96fb\u8a2d\u5099\u306b\u5916\u90e8\u907f\u96f7\u30b7\u30b9\u30c6\u30e0\u304c\u8a2d\u7f6e\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u3001\u5fc5\u8981\u306a\u96e2\u9694\u8ddd\u96e2\u3092\u78ba\u4fdd\u3067\u304d\u306a\u3044\u5834\u5408\u3001\u307e\u305f\u306f\u96f7\u96fb\u6d41\u304c\u96f7\u4fdd\u8b77\u30be\u30fc\u30f3\u306e\u5883\u754c\u3092\u8d8a\u3048\u3066\u96fb\u6c17\u8a2d\u5099\u306b\u4fb5\u5165\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u5834\u5408\u306f\u3001\u30bf\u30a4\u30d71\u307e\u305f\u306f\u30bf\u30a4\u30d71+2\u306e\u4fdd\u8b77\u3092\u691c\u8a0e\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n<p>\u30bf\u30a4\u30d71\u306e\u4e3b\u8981\u306a\u30d1\u30e9\u30e1\u30fc\u30bf\u306f\u901a\u5e38\u3001 <strong>\u30a4\u30f3\u30d7<\/strong>. Iimp\uff08\u30a4\u30f3\u30d1\u30eb\u30b9\u96fb\u6d41\uff09\u3067\u3059\u3002Imax\u306e\u5024\u304c\u5927\u304d\u3044\u3053\u3068\u3060\u3051\u3067\u306f\u3001\u305d\u306eSPD\u304c\u30bf\u30a4\u30d71\u306e\u7528\u9014\u306b\u9069\u3057\u3066\u3044\u308b\u3068\u306f\u8a3c\u660e\u3055\u308c\u307e\u305b\u3093\u3002\u306a\u305c\u306a\u3089\u3001Imax\u306f\u901a\u5e388\/20\u03bcs\u306e\u6ce2\u5f62\u306b\u95a2\u9023\u4ed8\u3051\u3089\u308c\u3066\u3044\u308b\u304b\u3089\u3067\u3059\u3002.<\/p>\n<h2>\u30af\u30e9\u30b9II \/ \u30bf\u30a4\u30d72 DC SPD<\/h2>\n<p>\u30af\u30e9\u30b9II\u306f\u4e00\u822c\u7684\u306b\u30018\/20\u03bcs\u306e\u96fb\u6d41\u6ce2\u5f62\u3067\u8a66\u9a13\u3055\u308c\u305f\u30bf\u30a4\u30d72 SPD\u306b\u5bfe\u5fdc\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u8a98\u5c0e\u96f7\u30b5\u30fc\u30b8\u3084\u958b\u9589\u30b5\u30fc\u30b8\u306b\u5bfe\u3059\u308b\u4fdd\u8b77\u3068\u3057\u3066\u6700\u3082\u4e00\u822c\u7684\u306b\u4f7f\u7528\u3055\u308c\u308b\u30af\u30e9\u30b9\u3067\u3042\u308a\u3001 <a href=\"https:\/\/cnkuangya.com\/ja\/product\/type-2-pv-surge-protective-device\/\">PV\u30b3\u30f3\u30d0\u30a4\u30ca\u30fc\u30dc\u30c3\u30af\u30b9<\/a>, \u76f4\u6d41\u914d\u96fb\u6a5f\u5668\u3084\u30a4\u30f3\u30d0\u30fc\u30bf\u306eDC\u5165\u529b\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002.<\/p>\n<p>\u30bf\u30a4\u30d72 SPD\u306f\u3001\u5354\u8abf\u4fdd\u8b77\u30b7\u30b9\u30c6\u30e0\u306e\u4e00\u90e8\u3068\u3057\u3066\u30bf\u30a4\u30d71 SPD\u306e\u4e0b\u6d41\u306b\u8a2d\u7f6e\u3059\u308b\u3053\u3068\u3082\u53ef\u80fd\u3067\u3059\u3002\u88fd\u54c1\u304c\u30bf\u30a4\u30d71\u307e\u305f\u306f\u30bf\u30a4\u30d71+2\u3068\u3057\u3066\u8a66\u9a13\u3055\u308c\u3001\u5ba3\u8a00\u3055\u308c\u3066\u3044\u306a\u3044\u9650\u308a\u3001\u76f4\u6483\u96f7\u96fb\u6d41\u7528\u907f\u96f7\u5668\u3068\u3057\u3066\u8ca9\u58f2\u3057\u3066\u306f\u306a\u308a\u307e\u305b\u3093\u3002.<\/p>\n<h2>\u30af\u30e9\u30b9III \/ \u30bf\u30a4\u30d73 SPD<\/h2>\n<p>\u30af\u30e9\u30b9III\u307e\u305f\u306f\u30bf\u30a4\u30d73\u306eSPD\u306f\u3001\u7cbe\u5bc6\u6a5f\u5668\u306e\u8fd1\u304f\u3067\u5fae\u7d30\u306a\u4fdd\u8b77\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u3053\u308c\u3089\u306f\u4e00\u822c\u7684\u306b\u30011.2\/50 \u03bcs\u306e\u958b\u653e\u96fb\u5727\u6ce2\u5f62\u30688\/20 \u03bcs\u306e\u77ed\u7d61\u96fb\u6d41\u6ce2\u5f62\u3092\u7d44\u307f\u5408\u308f\u305b\u305f\u30b3\u30f3\u30d3\u30cd\u30fc\u30b7\u30e7\u30f3\u30a6\u30a7\u30fc\u30d6\u30b8\u30a7\u30cd\u30ec\u30fc\u30bf\u3092\u4f7f\u7528\u3057\u3066\u8a55\u4fa1\u3055\u308c\u307e\u3059\u3002.<\/p>\n<p>\u30bf\u30a4\u30d73\u306e\u30c7\u30d0\u30a4\u30b9\u306f\u901a\u5e38\u3001\u4e0a\u6d41\u306e\u30bf\u30a4\u30d71\u307e\u305f\u306f\u30bf\u30a4\u30d72\u306e\u4fdd\u8b77\u6a5f\u5668\u3068\u7d44\u307f\u5408\u308f\u305b\u3066\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u3053\u308c\u3089\u306f\u5358\u72ec\u3067\u6d41\u5165\u3059\u308b\u30b5\u30fc\u30b8\u30a8\u30cd\u30eb\u30ae\u30fc\u306e\u3059\u3079\u3066\u3092\u5438\u53ce\u3059\u308b\u3053\u3068\u3092\u76ee\u7684\u3068\u3057\u3066\u3044\u307e\u305b\u3093\u3002.<\/p>\n<hr \/>\n<h2>1000 V DC SPD\u306e\u9298\u677f\u306e\u8aad\u307f\u65b9<\/h2>\n<figure><img decoding=\"async\" src=\"https:\/\/cnkuangya.com\/wp-content\/uploads\/2026\/08\/dc-spd-nameplate-parameters-line-drawing.png\" alt=\"Line drawing explaining Ucpv, Class II, In, Imax, Up and Iscpv on a 1000 V DC SPD nameplate\" \/><figcaption>DC SPD\u306e\u9298\u677f\u306b\u8a18\u8f09\u3055\u308c\u305f\u5404\u5024\u306f\u3001\u9078\u5b9a\u3084\u5b89\u5168\u6027\u306b\u95a2\u3059\u308b\u500b\u5225\u306e\u554f\u3044\u306b\u5bfe\u3059\u308b\u56de\u7b54\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002.<\/figcaption><\/figure>\n<h3>Ucpv: 1000 V DC<\/h3>\n<p><strong>Ucpv<\/strong> \u592a\u967d\u5149\u767a\u96fb\u7528SPD\u306e\u6700\u5927\u9023\u7d9a\u4f7f\u7528\u96fb\u5727\u3067\u3059\u3002\u30e1\u30fc\u30ab\u30fc\u304c\u898f\u5b9a\u3059\u308b\u6761\u4ef6\u4e0b\u3067\u3001SPD\u306b\u9023\u7d9a\u7684\u306b\u5370\u52a0\u53ef\u80fd\u306a\u6700\u9ad8DC\u96fb\u5727\u3092\u6307\u3057\u307e\u3059\u3002.<\/p>\n<p>\u9078\u5b9a\u3059\u308bUcpv\u306f\u3001\u6700\u4f4e\u4e88\u60f3\u6e29\u5ea6\u3092\u8003\u616e\u3057\u3066\u88dc\u6b63\u3057\u305f\u5f8c\u306ePV\u30a2\u30ec\u30a4\u306e\u6700\u5927\u958b\u653e\u96fb\u5727\u3092\u4e0b\u56de\u3063\u3066\u306f\u306a\u308a\u307e\u305b\u3093\u3002\u30e2\u30b8\u30e5\u30fc\u30eb\u306eVoc\u306f\u6e29\u5ea6\u4f4e\u4e0b\u3068\u3068\u3082\u306b\u4e0a\u6607\u3059\u308b\u305f\u3081\u3001\u300c1000 V DC\u300d\u3068\u8a18\u8f09\u3055\u308c\u305f\u30b7\u30b9\u30c6\u30e0\u3067\u3042\u3063\u3066\u3082\u3001\u5bd2\u51b7\u6642\u306e\u6700\u5927\u96fb\u5727\u3092\u78ba\u8a8d\u305b\u305a\u306b1000 V\u306eUcpv SPD\u3092\u305d\u306e\u307e\u307e\u4f7f\u7528\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3002.<\/p>\n<h3>\u30af\u30e9\u30b9II<\/h3>\n<p>\u3053\u306e\u8868\u793a\u306f\u30af\u30e9\u30b9II\u8a66\u9a13\u3001\u304a\u3088\u3073\u901a\u5e38\u306f\u30bf\u30a4\u30d72\u306e\u7528\u9014\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306f\u4e3b\u306b8\/20 \u03bcs\u6ce2\u5f62\u3067\u8868\u3055\u308c\u308b\u8a98\u5c0e\u30b5\u30fc\u30b8\u3084\u958b\u9589\u30b5\u30fc\u30b8\u306b\u5bfe\u5fdc\u3059\u308b\u3082\u306e\u3067\u3059\u3002\u88fd\u54c1\u306e\u54c1\u8cea\u3084\u77ed\u7d61\u5bb9\u91cf\u3092\u793a\u3059\u3082\u306e\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002.<\/p>\n<h3>In: 20 kA<\/h3>\n<p><strong>\u3067<\/strong> \u516c\u79f0\u653e\u96fb\u96fb\u6d41\u3067\u3042\u308a\u3001\u901a\u5e38\u30bf\u30a4\u30d72 SPD\u306b\u5bfe\u3057\u30668\/20 \u03bcs\u306e\u6ce2\u5f62\u3067\u898f\u5b9a\u3055\u308c\u307e\u3059\u3002\u3053\u308c\u306f\u6a19\u6e96\u7684\u306a\u8a66\u9a13\u30b7\u30fc\u30b1\u30f3\u30b9\u3067\u4f7f\u7528\u3055\u308c\u3001\u898f\u5b9a\u3055\u308c\u305f\u8a66\u9a13\u6761\u4ef6\u4e0b\u306b\u304a\u3051\u308b\u7e70\u308a\u8fd4\u3057\u30b5\u30fc\u30b8\u96fb\u6d41\u8010\u91cf\u3092\u793a\u3059\u91cd\u8981\u306a\u6307\u6a19\u3067\u3059\u3002.<\/p>\n<h3>Imax: 40 kA<\/h3>\n<p><strong>\u30a2\u30a4\u30de\u30c3\u30af\u30b9<\/strong> \u6700\u5927\u653e\u96fb\u96fb\u6d41\u3067\u3042\u308a\u3001\u901a\u5e388\/20 \u03bcs\u306e\u6ce2\u5f62\u306b\u95a2\u9023\u4ed8\u3051\u3089\u308c\u307e\u3059\u3002\u3053\u308c\u306f\u3088\u308a\u9ad8\u3044\u5236\u9650\u653e\u96fb\u5024\u3067\u3042\u308a\u3001SPD\u304c\u7e70\u308a\u8fd4\u3057\u6d41\u3059\u3053\u3068\u304c\u3067\u304d\u308b\u96fb\u6d41\u3068\u89e3\u91c8\u3057\u3066\u306f\u306a\u308a\u307e\u305b\u3093\u3002.<\/p>\n<p>In\u304a\u3088\u3073Imax\u306f\u3001\u95a2\u9023\u3059\u308b\u6ce2\u5f62\u3092\u8003\u616e\u3057\u306a\u3044\u9650\u308a\u3001Iimp\u3068\u76f4\u63a5\u6bd4\u8f03\u3057\u3066\u306f\u306a\u308a\u307e\u305b\u3093\u300210\/350 \u03bcs\u306e\u96f7\u30a4\u30f3\u30d1\u30eb\u30b9\u96fb\u6d41\u306f\u3001\u540c\u3058\u30d4\u30fc\u30af\u5024\u3092\u6301\u30648\/20 \u03bcs\u306e\u30a4\u30f3\u30d1\u30eb\u30b9\u3088\u308a\u3082\u5927\u5e45\u306b\u591a\u304f\u306e\u30a8\u30cd\u30eb\u30ae\u30fc\u3092\u542b\u3093\u3067\u3044\u307e\u3059\u3002.<\/p>\n<h3>Up: 4.0 kV<\/h3>\n<p><strong>\u4e0a\u3078<\/strong> \u96fb\u5727\u9632\u8b77\u30ec\u30d9\u30eb\u3067\u3059\u3002\u3053\u308c\u306f\u3001\u898f\u5b9a\u306e\u8a66\u9a13\u6761\u4ef6\u4e0b\u3067SPD\u304c\u96fb\u5727\u3092\u5236\u9650\u3059\u308b\u30ec\u30d9\u30eb\u3092\u793a\u3057\u307e\u3059\u3002Up\u306f\u3001\u4fdd\u8b77\u5bfe\u8c61\u6a5f\u5668\u306e\u30a4\u30f3\u30d1\u30eb\u30b9\u8010\u96fb\u5727\u3068\u6574\u5408\u3055\u305b\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n<p>Up\u304c\u4f4e\u3044\u307b\u3069\u4fdd\u8b77\u30de\u30fc\u30b8\u30f3\u306f\u5411\u4e0a\u3057\u307e\u3059\u304c\u3001Up\u306e\u307f\u3067\u8a55\u4fa1\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3002Ucpv\u306fPV\u30b7\u30b9\u30c6\u30e0\u306b\u5bfe\u3057\u3066\u5341\u5206\u306b\u9ad8\u3044\u5024\u3092\u7dad\u6301\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u3001\u30b5\u30fc\u30b8\u767a\u751f\u6642\u306b\u5c0e\u4f53\u306e\u30a4\u30f3\u30c0\u30af\u30bf\u30f3\u30b9\u304c\u96fb\u5727\u3092\u4e0a\u6607\u3055\u305b\u308b\u305f\u3081\u3001\u8a2d\u7f6e\u6642\u306e\u5c0e\u4f53\u9577\u306f\u6700\u5c0f\u9650\u306b\u6291\u3048\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002.<\/p>\n<h3>Iscpv: 10 kA<\/h3>\n<p><strong>Iscpv<\/strong> is the PV short-circuit current rating of the SPD. It is not a surge-discharge rating. It describes the prospective PV short-circuit current for which the SPD and its disconnection arrangement are suitable under the manufacturer&#8217;s declared conditions.<\/p>\n<p>\u3053\u306e\u5024\u306f\u3001\u6545\u969c\u3057\u305fSPD\u304c\u5371\u967a\u306a\u76f4\u6d41\u30a2\u30fc\u30af\u3092\u767a\u751f\u3055\u305b\u308b\u3053\u3068\u306a\u304f\u5b89\u5168\u306b\u906e\u65ad\u3055\u308c\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u305f\u3081\u3001DC\u592a\u967d\u5149\u767a\u96fb\u30b7\u30b9\u30c6\u30e0\u306b\u304a\u3044\u3066\u7279\u306b\u91cd\u8981\u3067\u3059\u3002.<\/p>\n<h3>5%\uff5e95% \u76f8\u5bfe\u6e7f\u5ea6<\/h3>\n<p>\u3053\u308c\u306f\u901a\u5e38\u3001\u8a31\u5bb9\u3055\u308c\u308b\u76f8\u5bfe\u6e7f\u5ea6\u306e\u7bc4\u56f2\u3092\u793a\u3057\u307e\u3059\u3002\u7d50\u9732\u306a\u304d\u3053\u3068\u3001\u8150\u98df\u3001\u7740\u6c37\u3001\u9ad8\u5ea6\u306a\u3069\u306e\u6761\u4ef6\u306b\u3064\u3044\u3066\u306f\u3001\u5b8c\u5168\u306a\u30c7\u30fc\u30bf\u30b7\u30fc\u30c8\u3092\u78ba\u8a8d\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n<h3>-40\u00b0C\uff5e+85\u00b0C<\/h3>\n<p>\u3053\u308c\u306f\u898f\u5b9a\u3055\u308c\u305f\u6e29\u5ea6\u7bc4\u56f2\u3067\u3059\u3002\u5c4b\u5916\u306e\u30b3\u30f3\u30d0\u30a4\u30ca\u30dc\u30c3\u30af\u30b9\u3084\u7b50\u4f53\u5185\u306b\u8a2d\u7f6e\u3055\u308c\u308b\u6a5f\u5668\u306e\u5834\u5408\u3001\u7b50\u4f53\u5185\u90e8\u306e\u6e29\u5ea6\u306f\u5468\u56f2\u306e\u6c17\u6e29\u3088\u308a\u3082\u5927\u5e45\u306b\u9ad8\u304f\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n<h3>\u5c4b\u5185\u7528\u304a\u3088\u3073IP20<\/h3>\n<p>IP20\u306f\u3001\u6307\u306e\u63a5\u89e6\u3084\u7279\u5b9a\u306e\u56fa\u5f62\u7269\u306b\u5bfe\u3059\u308b\u57fa\u672c\u7684\u306a\u4fdd\u8b77\u3092\u63d0\u4f9b\u3057\u307e\u3059\u304c\u30012\u6841\u76ee\u306e\u300c0\u300d\u306f\u6c34\u306e\u6d78\u5165\u306b\u5bfe\u3059\u308b\u4fdd\u8b77\u304c\u898f\u5b9a\u3055\u308c\u3066\u3044\u306a\u3044\u3053\u3068\u3092\u610f\u5473\u3057\u307e\u3059\u3002IP20\u306eSPD\u306f\u3001\u76f4\u63a5\u96e8\u306b\u3055\u3089\u3055\u308c\u308b\u5834\u6240\u306b\u8a2d\u7f6e\u3057\u3066\u306f\u306a\u308a\u307e\u305b\u3093\u3002\u5c4b\u5916\u306e\u592a\u967d\u5149\u767a\u96fb\u7528\u9014\u3067\u306f\u3001\u74b0\u5883\u6761\u4ef6\u306b\u9069\u3057\u305f\u7b50\u4f53\u3092\u9078\u629e\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n<hr \/>\n<h2>\u592a\u967d\u5149\u767a\u96fb\u30b7\u30b9\u30c6\u30e0\u306b\u304a\u3044\u3066\u3001DC SPD\u306f\u3069\u3053\u306b\u8a2d\u7f6e\u3055\u308c\u308b\u306e\u304b\uff1f<\/h2>\n<figure><img decoding=\"async\" src=\"https:\/\/cnkuangya.com\/wp-content\/uploads\/2026\/08\/pv-dc-spd-installation-line-drawing.png\" alt=\"Line drawing showing DC SPD locations at a PV combiner box and inverter input\" \/><figcaption>\u9577\u8ddd\u96e2\u306eDC\u30b1\u30fc\u30d6\u30eb\u914d\u7dda\u3067\u306f\u3001\u30a2\u30ec\u30a4\u5074\u3068\u30a4\u30f3\u30d0\u30fc\u30bf\u5074\u306e\u4e21\u7aef\u3067\u5354\u8abf\u3055\u308c\u305fSPD\u304c\u5fc5\u8981\u3068\u306a\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002.<\/figcaption><\/figure>\n<p>DC\u7528SPD\u306f\u3001\u4e00\u822c\u7684\u306bPV\u63a5\u7d9a\u7bb1\u5185\u3084\u30a4\u30f3\u30d0\u30fc\u30bf\u306eDC\u5165\u529b\u4ed8\u8fd1\u306b\u8a2d\u7f6e\u3055\u308c\u307e\u3059\u3002\u9069\u5207\u306a\u8a2d\u7f6e\u6570\u3084\u8a2d\u7f6e\u5834\u6240\u306f\u3001\u30b7\u30b9\u30c6\u30e0\u69cb\u6210\u3001\u914d\u7dda\u7d4c\u8def\u3001\u96f7\u4fdd\u8b77\u30b3\u30f3\u30bb\u30d7\u30c8\u3001\u63a5\u5730\u65b9\u5f0f\u3001\u304a\u3088\u3073\u6a5f\u5668\u306e\u8010\u96fb\u5727\u30ec\u30d9\u30eb\u306b\u3088\u3063\u3066\u7570\u306a\u308a\u307e\u3059\u3002.<\/p>\n<p>DC\u30b1\u30fc\u30d6\u30eb\u304c\u9577\u8ddd\u96e2\u306b\u53ca\u3076\u5834\u5408\u3001\u4e21\u7aef\u306b\u5354\u8abf\u3055\u308c\u305fSPD\u304c\u5fc5\u8981\u3068\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u6700\u7d42\u7684\u306a\u914d\u7f6e\u3068\u5354\u8abf\u306f\u3001\u5358\u4e00\u306e\u30c7\u30d0\u30a4\u30b9\u3067\u89e3\u6c7a\u3059\u308b\u3068\u3044\u3046\u30eb\u30fc\u30eb\u3067\u306f\u306a\u304f\u3001\u9069\u7528\u3055\u308c\u308b\u8a2d\u7f6e\u8a2d\u8a08\u304a\u3088\u3073IEC 61643-32\u306b\u5f93\u3046\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n<hr \/>\n<h2>Type 1\u3001Type 2\u3001\u307e\u305f\u306fType 1+2\u3092\u3044\u3064\u9078\u629e\u3059\u3079\u304d\u304b\uff1f<\/h2>\n<h3>\u4ee5\u4e0b\u306e\u5834\u5408\u306b\u306f\u3001Type 1\u307e\u305f\u306fType 1+2\u306e\u691c\u8a0e\u304c\u5fc5\u8981\u3067\u3059\uff1a<\/h3>\n<ul>\n<li>\u5efa\u7269\u306b\u5916\u90e8\u96f7\u4fdd\u8b77\u30b7\u30b9\u30c6\u30e0\u304c\u8a2d\u7f6e\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u3002.<\/li>\n<li>\u5fc5\u8981\u306a\u96e2\u9694\u8ddd\u96e2\u3092\u78ba\u4fdd\u3067\u304d\u306a\u3044\u5834\u5408\u3002.<\/li>\n<li>\u96f7\u96fb\u6d41\u304cPV\u914d\u7dda\u306b\u4fb5\u5165\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3001\u307e\u305f\u306f\u96f7\u4fdd\u8b77\u30be\u30fc\u30f3\uff08LPZ\uff09\u306e\u5883\u754c\u3092\u8d8a\u3048\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u5834\u5408\u3002.<\/li>\n<li>\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u30ea\u30b9\u30af\u8a55\u4fa1\u306b\u306f\u3001\u96f7\u96fb\u6d41\u653e\u96fb\u80fd\u529b\u304c\u6c42\u3081\u3089\u308c\u307e\u3059\u3002.<\/li>\n<\/ul>\n<h3>\u4ee5\u4e0b\u306e\u5834\u5408\u306b\u306f\u30bf\u30a4\u30d72\u3092\u691c\u8a0e\u3057\u3066\u304f\u3060\u3055\u3044\uff1a<\/h3>\n<ul>\n<li>\u4e3b\u306a\u30ea\u30b9\u30af\u304c\u8a98\u5c0e\u96f7\u307e\u305f\u306f\u958b\u9589\u30b5\u30fc\u30b8\u3067\u3042\u308b\u5834\u5408\u3002.<\/li>\n<li>SPD\u304c\u4e0a\u6d41\u306e\u30bf\u30a4\u30d71\u30c7\u30d0\u30a4\u30b9\u306e\u4e0b\u6d41\u306b\u8a2d\u7f6e\u3055\u308c\u308b\u5834\u5408\u3002.<\/li>\n<li>PV\u63a5\u7d9a\u7bb1\u307e\u305f\u306f\u30a4\u30f3\u30d0\u30fc\u30bf\u5165\u529b\u306b\u304a\u3044\u3066\u3001\u76f4\u6483\u96f7\u96fb\u6d41\u306e\u8cac\u52d9\u3092\u4f34\u308f\u306a\u3044\u5c40\u6240\u7684\u306a\u30b5\u30fc\u30b8\u4fdd\u8b77\u304c\u5fc5\u8981\u306a\u5834\u5408\u3002.<\/li>\n<\/ul>\n<p>\u6700\u7d42\u9078\u5b9a\u306b\u304a\u3044\u3066\u306f\u3001\u30e9\u30d9\u30eb\u4e0a\u306e\u6700\u5927kA\u5024\u3060\u3051\u3067\u306a\u304f\u3001Ucpv\u3001\u8a72\u5f53\u3059\u308b\u5834\u5408\u306fIimp\u3001In\u3001Imax\u3001Up\u3001Iscpv\u3001\u4fdd\u8b77\u30e2\u30fc\u30c9\u3001\u63a5\u5730\u65b9\u5f0f\u3001\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u4fdd\u8b77\u3001\u304a\u3088\u3073\u8a8d\u8a3c\u3092\u5e38\u306b\u8003\u616e\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n<hr \/>\n<h2>DC SPD\u9078\u5b9a\u306b\u304a\u3051\u308b\u4e00\u822c\u7684\u306a\u8aa4\u308a<\/h2>\n<ol>\n<li><strong>\u30af\u30e9\u30b9II\u3092\u54c1\u8cea\u7b49\u7d1a\u3068\u3057\u3066\u6271\u3046\u3053\u3068\u3002.<\/strong> \u3053\u308c\u306f\u8a66\u9a13\u30af\u30e9\u30b9\u3067\u3042\u308a\u3001\u88fd\u54c1\u304c\u4e8c\u7d1a\u54c1\u3067\u3042\u308b\u3053\u3068\u3092\u793a\u3059\u3082\u306e\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002.<\/li>\n<li><strong>\u6ce2\u5f62\u3092\u8003\u616e\u305b\u305a\u306b\u5b9a\u683c\u96fb\u6d41\u3092\u6bd4\u8f03\u3059\u308b\u3053\u3068\u3002.<\/strong> 8\/20 \u03bcs\u306b\u304a\u3051\u308b40 kA\u306f\u300110\/350 \u03bcs\u306b\u304a\u3051\u308b40 kA\u3068\u540c\u7b49\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002.<\/li>\n<li><strong>Iscpv\u3068\u30b5\u30fc\u30b8\u96fb\u6d41\u3092\u6df7\u540c\u3059\u308b\u3053\u3068\u3002.<\/strong> Iscpv\u306fPV\u77ed\u7d61\u6761\u4ef6\u306b\u95a2\u9023\u3057\u3001In\u304a\u3088\u3073Imax\u306f\u30b5\u30fc\u30b8\u653e\u96fb\u306b\u95a2\u9023\u3057\u307e\u3059\u3002.<\/li>\n<li><strong>\u516c\u79f0\u30b7\u30b9\u30c6\u30e0\u96fb\u5727\u306e\u307f\u306b\u57fa\u3065\u3044\u3066Ucpv\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u3002.<\/strong> \u4f4e\u6e29\u6642\u306eVoc\u3092\u8a08\u7b97\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002.<\/li>\n<li><strong>\u5c0e\u4f53\u306e\u9577\u3055\u3092\u7121\u8996\u3059\u308b\u3053\u3068\u3002.<\/strong> SPD\u306e\u63a5\u7d9a\u914d\u7dda\u304c\u9577\u3044\u3068\u3001\u4fdd\u8b77\u5bfe\u8c61\u6a5f\u5668\u306b\u304b\u304b\u308b\u5b9f\u52b9\u96fb\u5727\u304c\u4e0a\u6607\u3057\u307e\u3059\u3002.<\/li>\n<li><strong>IP20\u6a5f\u5668\u3092\u7b50\u4f53\u306a\u3057\u3067\u5c4b\u5916\u306b\u8a2d\u7f6e\u3059\u308b\u3053\u3068\u3002.<\/strong> IP20\u306f\u9632\u6c34\u6027\u80fd\u3092\u5099\u3048\u3066\u3044\u307e\u305b\u3093\u3002.<\/li>\n<li><strong>Type 1\u306e\u6027\u80fd\u304c\u6c42\u3081\u3089\u308c\u308b\u7b87\u6240\u306bType 2\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3002.<\/strong> \u76f4\u6483\u96f7\u306e\u30ea\u30b9\u30af\u304c\u3042\u308b\u5834\u5408\u306f\u3001\u9069\u5207\u306a\u8a66\u9a13\u30af\u30e9\u30b9\u3068\u30b7\u30b9\u30c6\u30e0\u8a2d\u8a08\u304c\u5fc5\u8981\u3067\u3059\u3002.<\/li>\n<\/ol>\n<hr \/>\n<h2>\u7d50\u8ad6<\/h2>\n<p>DC SPD\u306e\u9069\u5207\u306a\u9078\u5b9a\u306f\u3001\u8abf\u6574\u3055\u308c\u305f\u30a8\u30f3\u30b8\u30cb\u30a2\u30ea\u30f3\u30b0\u4e0a\u306e\u6c7a\u5b9a\u4e8b\u9805\u3067\u3059\u3002SPD\u306f\u3001\u9069\u5207\u306a\u9023\u7d9a\u52d5\u4f5c\u96fb\u5727\u3001\u6b63\u3057\u3044\u8a66\u9a13\u30af\u30e9\u30b9\u3001\u5341\u5206\u306a\u653e\u96fb\u8010\u91cf\u3001\u9069\u5207\u306a\u96fb\u5727\u9632\u8b77\u30ec\u30d9\u30eb\u3001\u304a\u3088\u3073\u5341\u5206\u306aPV\u77ed\u7d61\u5b89\u5168\u6027\u3092\u5099\u3048\u3066\u3044\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n<p>\u4f8b\u793a\u306e\u9298\u677f\u306b\u304a\u3044\u3066\u3001Class II\u306fType 2\u306e\u7528\u9014\u3092\u793a\u3057\u3001In 20 kA\u304a\u3088\u3073Imax 40 kA\u306f8\/20 \u03bcs\u306e\u30b5\u30fc\u30b8\u96fb\u6d41\u6027\u80fd\u3092\u8868\u3057\u3001Up 4.0 kV\u306f\u96fb\u5727\u9632\u8b77\u30ec\u30d9\u30eb\u3067\u3042\u308a\u3001Iscpv 10 kA\u306fPV\u77ed\u7d61\u96fb\u6d41\u5b9a\u683c\u3067\u3059\u3002\u3053\u308c\u3089\u306e\u5024\u306f\u4e92\u3044\u306b\u4ee3\u66ff\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3002.<\/p>\n<p>PV\u30b7\u30b9\u30c6\u30e0\u7528\u306eDC SPD\u9078\u5b9a\u3067\u304a\u56f0\u308a\u3067\u3059\u304b\uff1f\u9001\u4fe1\u3057\u3066\u304f\u3060\u3055\u3044\u3002 <a href=\"https:\/\/cnkuangya.com\/ja\/contact-us\/\">\u30af\u30a2\u30f3\u30cb\u30e3<\/a> \u6700\u5927\u30b7\u30b9\u30c6\u30e0\u96fb\u5727\u3001\u30e2\u30b8\u30e5\u30fc\u30eb\u30b9\u30c8\u30ea\u30f3\u30b0\u69cb\u6210\u3001\u6700\u4f4e\u8a2d\u7f6e\u5834\u6240\u6e29\u5ea6\u3001\u8a2d\u7f6e\u4f4d\u7f6e\u3001\u63a5\u5730\u65b9\u5f0f\u3001\u304a\u3088\u3073\u907f\u96f7\u6761\u4ef6\u3002\u7528\u9014\u306b\u9069\u3057\u305f\u30bf\u30a4\u30d71\u3001\u30bf\u30a4\u30d72\u3001\u307e\u305f\u306f\u30bf\u30a4\u30d71+2\u306e\u30e2\u30c7\u30eb\u3092\u63a8\u5968\u3044\u305f\u3057\u307e\u3059\u3002.<\/p>\n<hr \/>\n<h2>\u3088\u304f\u3042\u308b\u8cea\u554f<\/h2>\n<h3>\u30af\u30e9\u30b9I\u3068\u30af\u30e9\u30b9II\u306eDC SPD\u306e\u9055\u3044\u306f\u4f55\u3067\u3059\u304b\uff1f<\/h3>\n<p>Class I (Type 1) DC SPDs are tested with a 10\/350 \u03bcs lightning-current impulse and are intended for installations where partial lightning current may enter the PV system. Class II (Type 2) DC SPDs are tested with an 8\/20 \u03bcs waveform and mainly protect against induced lightning and switching surges.<\/p>\n<h3>Can a Type 2 SPD protect a PV system from direct lightning?<\/h3>\n<p>A Type 2 SPD is not automatically suitable for direct-lightning-current duty. Where lightning current can enter the installation, use a properly tested Type 1 or Type 1+2 SPD as required by the lightning protection and risk assessment.<\/p>\n<h3>How do I choose Ucpv for a DC SPD?<\/h3>\n<p>Choose a Ucpv rating that is not lower than the PV array maximum open-circuit voltage after correcting module Voc for the lowest expected site temperature. Also verify the inverter voltage limit and the manufacturer\u2019s installation requirements.<\/p>\n<h3>Where should DC SPDs be installed?<\/h3>\n<p>Typical locations include PV combiner boxes and inverter DC inputs. Long cable routes or lightning protection zone boundaries may require coordinated SPDs at more than one location.<\/p>\n<h2>Standards Referenced<\/h2>\n<ul>\n<li>IEC 61643-31 \u2014 Requirements and test methods for SPDs for photovoltaic installations.<\/li>\n<li>IEC 61643-32 \u2014 Selection and application principles for SPDs connected to the DC side of photovoltaic installations.<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>A Practical Guide to Class I, Class II and Class III Surge Protective Devices DC surge protective devices (SPDs) are used on the DC side of photovoltaic systems to limit transient overvoltages and divert surge current before it damages inverters, monitoring equipment, combiner boxes and other sensitive components. However, markings such as Class I, Class II, In, Imax, Up and Iscpv are often misunderstood. This guide explains DC SPD classes\u2014Class I, Class II and Class III\u2014and shows how to interpret a typical 1000 V DC photovoltaic SPD nameplate. Key Takeaways Class I, Class II and Class III describe SPD test classes, not product quality grades. Class I is generally associated [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[35],"tags":[],"class_list":["post-4376","post","type-post","status-publish","format-standard","hentry","category-blog"],"blocksy_meta":[],"_links":{"self":[{"href":"https:\/\/cnkuangya.com\/ja\/wp-json\/wp\/v2\/posts\/4376","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\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/cnkuangya.com\/ja\/wp-json\/wp\/v2\/comments?post=4376"}],"version-history":[{"count":3,"href":"https:\/\/cnkuangya.com\/ja\/wp-json\/wp\/v2\/posts\/4376\/revisions"}],"predecessor-version":[{"id":4395,"href":"https:\/\/cnkuangya.com\/ja\/wp-json\/wp\/v2\/posts\/4376\/revisions\/4395"}],"wp:attachment":[{"href":"https:\/\/cnkuangya.com\/ja\/wp-json\/wp\/v2\/media?parent=4376"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cnkuangya.com\/ja\/wp-json\/wp\/v2\/categories?post=4376"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cnkuangya.com\/ja\/wp-json\/wp\/v2\/tags?post=4376"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}