{"id":23388,"date":"2026-04-05T15:15:36","date_gmt":"2026-04-05T07:15:36","guid":{"rendered":"https:\/\/viox.com\/?p=23388"},"modified":"2026-04-05T15:15:39","modified_gmt":"2026-04-05T07:15:39","slug":"how-to-read-dc-isolator-switch-ratings-voltage-current-poles-and-utilization-categories","status":"publish","type":"post","link":"https:\/\/test.viox.com\/bn\/how-to-read-dc-isolator-switch-ratings-voltage-current-poles-and-utilization-categories\/","title":{"rendered":"How to Read DC Isolator Switch Ratings: Voltage, Current, Poles, and Utilization Categories"},"content":{"rendered":"<div class=\"product-intro\">\n<h2>\u09b8\u09b0\u09be\u09b8\u09b0\u09bf \u0989\u09a4\u09cd\u09a4\u09b0<\/h2>\n<p>\u098f\u0995\u099f\u09bf <a href=\"https:\/\/test.viox.com\/bn\/dc-isolator-switch\/\">\u09a1\u09bf\u09b8\u09bf \u0986\u0987\u09b8\u09cb\u09b2\u09c7\u099f\u09b0 \u09b8\u09c1\u0987\u099a<\/a> \u09b2\u09c7\u09ac\u09c7\u09b2 \u09b8\u09a0\u09bf\u0995\u09ad\u09be\u09ac\u09c7 \u09aa\u09dc\u09be \u099a\u09be\u09b0\u099f\u09bf \u09ac\u09bf\u09b7\u09df\u09c7\u09b0 \u0989\u09aa\u09b0 \u09a8\u09bf\u09b0\u09cd\u09ad\u09b0 \u0995\u09b0\u09c7, \u09af\u09be \u098f\u0987 \u0995\u09cd\u09b0\u09ae\u09c7 \u09aa\u09b0\u09c0\u0995\u09cd\u09b7\u09be \u0995\u09b0\u09be \u09b9\u09df:<\/p>\n<ul>\n<li><strong>\u09ad\u09cb\u09b2\u09cd\u099f\u09c7\u099c \u09b0\u09c7\u099f\u09bf\u0982<\/strong> \u2014 \u09b8\u09c1\u0987\u099a\u099f\u09bf \u0995\u09bf \u0986\u09aa\u09a8\u09be\u09b0 \u09b8\u09bf\u09b8\u09cd\u099f\u09c7\u09ae\u09c7\u09b0 \u09b8\u09b0\u09cd\u09ac\u09cb\u099a\u09cd\u099a \u09a1\u09bf\u09b8\u09bf \u09ad\u09cb\u09b2\u09cd\u099f\u09c7\u099c \u09a8\u09bf\u09b0\u09be\u09aa\u09a6\u09c7 \u09b8\u09be\u09ae\u09b2\u09be\u09a4\u09c7 \u09aa\u09be\u09b0\u09ac\u09c7?<\/li>\n<li><strong>\u09ac\u09b0\u09cd\u09a4\u09ae\u09be\u09a8 \u09b0\u09c7\u099f\u09bf\u0982<\/strong> \u2014 \u098f\u099f\u09bf \u0995\u09bf \u0985\u09a4\u09bf\u09b0\u09bf\u0995\u09cd\u09a4 \u0997\u09b0\u09ae \u09b9\u0993\u09df\u09be \u099b\u09be\u09dc\u09be\u0987 \u09aa\u09cd\u09b0\u09a4\u09cd\u09af\u09be\u09b6\u09bf\u09a4 \u0985\u09ac\u09bf\u09b0\u09be\u09ae \u0995\u09be\u09b0\u09c7\u09a8\u09cd\u099f \u09ac\u09b9\u09a8 \u0995\u09b0\u09a4\u09c7 \u09aa\u09be\u09b0\u09ac\u09c7?<\/li>\n<li><strong>\u09ae\u09c7\u09b0\u09c1 \u0995\u09a8\u09ab\u09bf\u0997\u09be\u09b0\u09c7\u09b6\u09a8<\/strong> \u2014 \u098f\u099f\u09bf \u098f\u0995\u0987 \u09b8\u09ae\u09df\u09c7 \u0995\u09a4\u0997\u09c1\u09b2\u09bf \u0995\u09a8\u09cd\u09a1\u09be\u0995\u09cd\u099f\u09b0 \u09b8\u0982\u09af\u09cb\u0997 \u09ac\u09bf\u099a\u09cd\u099b\u09bf\u09a8\u09cd\u09a8 \u0995\u09b0\u09c7?<\/li>\n<li><strong>\u09ac\u09cd\u09af\u09ac\u09b9\u09be\u09b0\u09c7\u09b0 \u09ac\u09bf\u09ad\u09be\u0997<\/strong> \u2014 \u098f\u099f\u09bf \u0986\u09b8\u09b2\u09c7 \u0995\u09c0 \u09a7\u09b0\u09a8\u09c7\u09b0 \u09a1\u09bf\u09b8\u09bf \u09b8\u09c1\u0987\u099a\u09bf\u0982 \u09a1\u09bf\u0989\u099f\u09bf\u09b0 \u099c\u09a8\u09cd\u09af \u09aa\u09b0\u09c0\u0995\u09cd\u09b7\u09be \u0995\u09b0\u09be \u09b9\u09df\u09c7\u099b\u09c7?<\/li>\n<\/ul>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/Engineer-inspecting-DC-isolator-switch-ratings-on-a-photovoltaic-installation.webp\" alt=\"Engineer inspecting DC isolator switch ratings on a photovoltaic installation\" \/><figcaption style=\"font-style: italic; color: #555; margin-top: 8px;\">\u098f\u0995\u099c\u09a8 \u09aa\u09cd\u09b0\u0995\u09cc\u09b6\u09b2\u09c0 \u09b8\u09cb\u09b2\u09be\u09b0 \u09aa\u09bf\u09ad\u09bf \u0987\u09a8\u09b8\u09cd\u099f\u09b2\u09c7\u09b6\u09a8\u09c7 \u09a1\u09bf\u09b8\u09bf \u0986\u0987\u09b8\u09cb\u09b2\u09c7\u099f\u09b0 \u09b8\u09c1\u0987\u099a\u09c7\u09b0 \u09b0\u09c7\u099f\u09bf\u0982\u0997\u09c1\u09b2\u09cb \u09ae\u09a8\u09cb\u09af\u09cb\u0997 \u09b8\u09b9\u0995\u09be\u09b0\u09c7 \u09aa\u09b0\u09c0\u0995\u09cd\u09b7\u09be \u0995\u09b0\u099b\u09c7\u09a8 \u09b8\u09bf\u09b8\u09cd\u099f\u09c7\u09ae\u09c7\u09b0 \u09b8\u09c1\u09b0\u0995\u09cd\u09b7\u09be \u098f\u09ac\u0982 \u09b8\u09ae\u09cd\u09ae\u09a4\u09bf \u09a8\u09bf\u09b6\u09cd\u099a\u09bf\u09a4 \u0995\u09b0\u09be\u09b0 \u099c\u09a8\u09cd\u09af\u0964.<\/figcaption><\/figure>\n<p>\u0995\u09cd\u09b0\u09ae\u099f\u09bf \u0997\u09c1\u09b0\u09c1\u09a4\u09cd\u09ac\u09aa\u09c2\u09b0\u09cd\u09a3\u0964 \u09ac\u09be\u09b8\u09cd\u09a4\u09ac\u09c7, \u0995\u09cd\u09b0\u09c7\u09a4\u09be\u09b0\u09be \u09af\u0996\u09a8 \u09aa\u09cd\u09b0\u09a5\u09ae\u09c7 \u0985\u09cd\u09af\u09be\u09ae\u09cd\u09aa\u09bf\u09af\u09bc\u09be\u09b0\u09c7\u09b0 \u09b8\u0982\u0996\u09cd\u09af\u09be\u09b0 \u09a6\u09bf\u0995\u09c7 \u09ae\u09a8\u09cb\u09af\u09cb\u0997 \u09a6\u09c7\u09df \u098f\u09ac\u0982 \u09ad\u09cb\u09b2\u09cd\u099f\u09c7\u099c \u09b6\u09cd\u09b0\u09c7\u09a3\u09bf \u09ac\u09be \u09ac\u09cd\u09af\u09ac\u09b9\u09be\u09b0\u09c7\u09b0 \u09ac\u09bf\u09ad\u09be\u0997\u099f\u09bf \u0989\u09aa\u09c7\u0995\u09cd\u09b7\u09be \u0995\u09b0\u09c7, \u09a4\u0996\u09a8\u0987 \u09b0\u09c7\u099f\u09bf\u0982 \u09b8\u0982\u0995\u09cd\u09b0\u09be\u09a8\u09cd\u09a4 \u09ad\u09c1\u09b2\u0997\u09c1\u09b2\u09cb \u09ac\u09c7\u09b6\u09bf \u0998\u099f\u09c7\u0964 \u098f\u0995\u099f\u09bf \u09e9\u09e8A \u0986\u0987\u09b8\u09cb\u09b2\u09c7\u099f\u09b0 \u09b8\u09cd\u09ac\u09af\u09bc\u0982\u0995\u09cd\u09b0\u09bf\u09af\u09bc\u09ad\u09be\u09ac\u09c7 \u09aa\u09cd\u09b0\u09a4\u09bf\u099f\u09bf \u09e9\u09e8A \u09a1\u09bf\u09b8\u09bf \u09b8\u09be\u09b0\u09cd\u0995\u09bf\u099f\u09c7\u09b0 \u099c\u09a8\u09cd\u09af \u0989\u09aa\u09af\u09c1\u0995\u09cd\u09a4 \u09a8\u09af\u09bc, \u09ac\u09bf\u09b6\u09c7\u09b7 \u0995\u09b0\u09c7 \u09b8\u09cb\u09b2\u09be\u09b0 \u09aa\u09bf\u09ad\u09bf \u09b8\u09bf\u09b8\u09cd\u099f\u09c7\u09ae\u09c7, \u09af\u09c7\u0996\u09be\u09a8\u09c7 \u09a0\u09be\u09a8\u09cd\u09a1\u09be \u0986\u09ac\u09b9\u09be\u0993\u09df\u09be\u09b0 Voc, \u09aa\u09cb\u09b2 \u0985\u09cd\u09af\u09be\u09b0\u09c7\u099e\u09cd\u099c\u09ae\u09c7\u09a8\u09cd\u099f \u098f\u09ac\u0982 \u09a1\u09bf\u09b8\u09bf \u09b8\u09c1\u0987\u099a\u09bf\u0982 \u09a1\u09bf\u0989\u099f\u09bf \u09b8\u09ae\u09cd\u09aa\u09c2\u09b0\u09cd\u09a3 \u0989\u09a4\u09cd\u09a4\u09b0 \u09aa\u09b0\u09bf\u09ac\u09b0\u09cd\u09a4\u09a8 \u0995\u09b0\u09a4\u09c7 \u09aa\u09be\u09b0\u09c7\u0964.<\/p>\n<p>\u0986\u09aa\u09a8\u09be\u09b0 \u09af\u09a6\u09bf \u09aa\u09cd\u09b0\u09a5\u09ae\u09c7 \u09a1\u09bf\u09ad\u09be\u0987\u09b8\u099f\u09bf\u09b0 \u09ac\u09bf\u09b8\u09cd\u09a4\u09c3\u09a4 \u09aa\u099f\u09ad\u09c2\u09ae\u09bf \u099c\u09be\u09a8\u09be\u09b0 \u09aa\u09cd\u09b0\u09df\u09cb\u099c\u09a8 \u09b9\u09df, \u09a4\u09be\u09b9\u09b2\u09c7 \u09b6\u09c1\u09b0\u09c1 \u0995\u09b0\u09c1\u09a8 <a href=\"https:\/\/test.viox.com\/bn\/what-is-a-dc-isolator-switch\/\">\u09a1\u09bf\u09b8\u09bf \u0986\u0987\u09b8\u09cb\u09b2\u09c7\u099f\u09b0 \u09b8\u09c1\u0987\u099a \u0995\u09c0?<\/a>. \u0964 \u0986\u09aa\u09a8\u09be\u09b0 \u09b8\u09be\u09ae\u09a8\u09c7 \u09af\u09a6\u09bf \u0987\u09a4\u09bf\u09ae\u09a7\u09cd\u09af\u09c7 \u098f\u0995\u099f\u09bf \u09b2\u09c7\u09ac\u09c7\u09b2, \u09a1\u09c7\u099f\u09be\u09b6\u09c0\u099f \u09ac\u09be \u09aa\u09a3\u09cd\u09af\u09c7\u09b0 \u09b8\u09cd\u09aa\u09c7\u09b8\u09bf\u09ab\u09bf\u0995\u09c7\u09b6\u09a8 \u09b6\u09c0\u099f \u09a5\u09be\u0995\u09c7, \u09a4\u09be\u09b9\u09b2\u09c7 \u098f\u0987 \u0997\u09be\u0987\u09a1 \u0986\u09aa\u09a8\u09be\u0995\u09c7 \u09aa\u09cd\u09b0\u09a4\u09bf\u099f\u09bf \u09b2\u09be\u0987\u09a8\u09c7\u09b0 \u0985\u09b0\u09cd\u09a5 \u098f\u09ac\u0982 \u09aa\u09b0\u09ac\u09b0\u09cd\u09a4\u09c0\u09a4\u09c7 \u0995\u09c0 \u09af\u09be\u099a\u09be\u0987 \u0995\u09b0\u09a4\u09c7 \u09b9\u09ac\u09c7, \u09a4\u09be \u099c\u09be\u09a8\u09a4\u09c7 \u09b8\u09be\u09b9\u09be\u09af\u09cd\u09af \u0995\u09b0\u09ac\u09c7\u0964.<\/p>\n<h2>\u09a6\u09cd\u09b0\u09c1\u09a4 \u09b0\u09c7\u09ab\u09be\u09b0\u09c7\u09a8\u09cd\u09b8 \u099f\u09c7\u09ac\u09bf\u09b2<\/h2>\n<table style=\"border-collapse: collapse; width: 100%; text-align: left; margin-bottom: 20px;\" border=\"1\" cellspacing=\"0\" cellpadding=\"8\">\n<thead>\n<tr>\n<th>\u09b0\u09c7\u099f\u09bf\u0982 \u0986\u0987\u099f\u09c7\u09ae<\/th>\n<th>\u098f\u099f\u09bf \u0986\u09aa\u09a8\u09be\u0995\u09c7 \u0995\u09c0 \u099c\u09be\u09a8\u09be\u09df<\/th>\n<th>\u09b8\u09be\u09a7\u09be\u09b0\u09a3 \u09ad\u09c1\u09b2<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>\u09ad\u09cb\u09b2\u09cd\u099f\u09c7\u099c \u09b0\u09c7\u099f\u09bf\u0982 (Ue)<\/strong><\/td>\n<td>\u09b8\u09c1\u0987\u099a\u099f\u09bf \u09a4\u09be\u09b0 \u0989\u09b2\u09cd\u09b2\u09c7\u0996\u09bf\u09a4 \u09a1\u09bf\u0989\u099f\u09bf\u09b0 \u0985\u09a7\u09c0\u09a8\u09c7 \u09b8\u09b0\u09cd\u09ac\u09cb\u099a\u09cd\u099a \u0995\u09a4 \u09a1\u09bf\u09b8\u09bf \u0985\u09aa\u09be\u09b0\u09c7\u099f\u09bf\u0982 \u09ad\u09cb\u09b2\u09cd\u099f\u09c7\u099c \u09b8\u09be\u09ae\u09b2\u09be\u09a4\u09c7 \u09aa\u09be\u09b0\u09ac\u09c7<\/td>\n<td>\u09b6\u09c1\u09a7\u09c1\u09ae\u09be\u09a4\u09cd\u09b0 \u09a8\u09be\u09ae\u09ae\u09be\u09a4\u09cd\u09b0 \u09b8\u09bf\u09b8\u09cd\u099f\u09c7\u09ae \u09ad\u09cb\u09b2\u09cd\u099f\u09c7\u099c\u09c7\u09b0 \u09b8\u09be\u09a5\u09c7 \u09ae\u09c7\u09b2\u09be\u09a8\u09cb \u098f\u09ac\u0982 \u09a0\u09be\u09a8\u09cd\u09a1\u09be-\u09b8\u0982\u09b6\u09cb\u09a7\u09bf\u09a4 \u09aa\u09bf\u09ad\u09bf Voc \u0989\u09aa\u09c7\u0995\u09cd\u09b7\u09be \u0995\u09b0\u09be<\/td>\n<\/tr>\n<tr>\n<td><strong>\u0995\u09be\u09b0\u09c7\u09a8\u09cd\u099f \u09b0\u09c7\u099f\u09bf\u0982 (Ie)<\/strong><\/td>\n<td>\u09b8\u09c1\u0987\u099a\u099f\u09bf \u09a8\u09bf\u09b0\u09cd\u09a6\u09bf\u09b7\u09cd\u099f \u09a1\u09bf\u0989\u099f\u09bf\u09b0 \u0985\u09a7\u09c0\u09a8\u09c7 \u09af\u09c7 \u0995\u09be\u09b0\u09c7\u09a8\u09cd\u099f \u09ac\u09b9\u09a8 \u0995\u09b0\u09a4\u09c7 \u09aa\u09be\u09b0\u09ac\u09c7<\/td>\n<td>\u09a7\u09b0\u09c7 \u09a8\u09c7\u0993\u09df\u09be 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\u09ad\u09bf\u09a1\u09bf\u09b8\u09bf<\/li>\n<li>\u09ee\u09e6\u09e6 \u09ad\u09bf\u09a1\u09bf\u09b8\u09bf<\/li>\n<li>\u09e7\u09e6\u09e6\u09e6 \u09ad\u09bf\u09a1\u09bf\u09b8\u09bf<\/li>\n<li>\u09e7\u09e8\u09e6\u09e6 \u09ad\u09bf\u09a1\u09bf\u09b8\u09bf<\/li>\n<li>\u0985\u09a5\u09ac\u09be \u09e7\u09eb\u09e6\u09e6 \u09ad\u09bf\u09a1\u09bf\u09b8\u09bf, \u09af\u09be \u0987\u09a8\u09b8\u09cd\u099f\u09b2\u09c7\u09b6\u09a8 \u0986\u09b0\u09cd\u0995\u09bf\u099f\u09c7\u0995\u099a\u09be\u09b0\u09c7\u09b0 \u0989\u09aa\u09b0 \u09a8\u09bf\u09b0\u09cd\u09ad\u09b0 \u0995\u09b0\u09c7<\/li>\n<\/ul>\n<h3>\u09b8\u09ac\u099a\u09c7\u09df\u09c7 \u09b8\u09be\u09a7\u09be\u09b0\u09a3 \u09ad\u09c1\u09b2: \u09b8\u09b0\u09cd\u09ac\u09cb\u099a\u09cd\u099a \u09b8\u0982\u09b6\u09cb\u09a7\u09bf\u09a4 \u09ad\u09cb\u09b2\u09cd\u099f\u09c7\u099c\u09c7\u09b0 \u09aa\u09b0\u09bf\u09ac\u09b0\u09cd\u09a4\u09c7 \u09a8\u09be\u09ae\u09ae\u09be\u09a4\u09cd\u09b0 \u09ad\u09cb\u09b2\u09cd\u099f\u09c7\u099c \u09ac\u09cd\u09af\u09ac\u09b9\u09be\u09b0 \u0995\u09b0\u09be<\/h3>\n<p>\u09b8\u09cb\u09b2\u09be\u09b0 \u09b8\u09bf\u09b8\u09cd\u099f\u09c7\u09ae\u09c7, \u09b6\u09c1\u09a7\u09c1\u09ae\u09be\u09a4\u09cd\u09b0 \u09a8\u09be\u09ae\u09ae\u09be\u09a4\u09cd\u09b0 \u09a1\u09bf\u09b8\u09bf \u09b8\u09bf\u09b8\u09cd\u099f\u09c7\u09ae \u09b2\u09c7\u09ac\u09c7\u09b2\u09c7\u09b0 \u0989\u09aa\u09b0 \u09ad\u09bf\u09a4\u09cd\u09a4\u09bf \u0995\u09b0\u09c7 \u0986\u0987\u09b8\u09cb\u09b2\u09c7\u099f\u09b0 \u09a8\u09bf\u09b0\u09cd\u09ac\u09be\u099a\u09a8 \u0995\u09b0\u09be \u09b9\u09df \u09a8\u09be\u0964 \u09a0\u09be\u09a8\u09cd\u09a1\u09be \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be\u09b0 \u09b8\u0982\u09b6\u09cb\u09a7\u09a8 \u09b8\u09b9 \u0986\u09aa\u09a8\u09be\u09b0 \u09b8\u09b0\u09cd\u09ac\u09cb\u099a\u09cd\u099a \u0993\u09aa\u09c7\u09a8-\u09b8\u09be\u09b0\u09cd\u0995\u09bf\u099f \u09ad\u09cb\u09b2\u09cd\u099f\u09c7\u099c \u09aa\u09cd\u09b0\u09df\u09cb\u099c\u09a8\u0964.<\/p>\n<p>\u098f\u0987 \u09aa\u09b0\u09bf\u09b8\u09cd\u09a5\u09bf\u09a4\u09bf \u09ac\u09bf\u09ac\u09c7\u099a\u09a8\u09be \u0995\u09b0\u09c1\u09a8: \u098f\u0995\u099f\u09bf \u09aa\u09bf\u09ad\u09bf \u09b8\u09cd\u099f\u09cd\u09b0\u09bf\u0982 \u201c\u09e7\u09e6\u09e6\u09e6 \u09ad\u09bf \u09b8\u09bf\u09b8\u09cd\u099f\u09c7\u09ae\u201d-\u098f\u09b0 \u099c\u09a8\u09cd\u09af \u09a1\u09bf\u099c\u09be\u0987\u09a8 \u0995\u09b0\u09be \u09b9\u09df\u09c7\u099b\u09c7, \u0995\u09bf\u09a8\u09cd\u09a4\u09c1 \u098f\u0995\u099f\u09bf \u09a0\u09be\u09a8\u09cd\u09a1\u09be \u09b6\u09c0\u09a4\u09c7\u09b0 \u09b8\u0995\u09be\u09b2\u09c7 \u09aa\u09cd\u09b0\u0995\u09c3\u09a4 Voc \u09e7\u09e6\u09eb\u09e6 V \u098f \u09aa\u09cc\u0981\u099b\u09be\u09df\u0964 \u09af\u09a6\u09bf \u0986\u0987\u09b8\u09cb\u09b2\u09c7\u099f\u09b0\u099f\u09bf \u09b6\u09c1\u09a7\u09c1\u09ae\u09be\u09a4\u09cd\u09b0 \u09e7\u09e6\u09e6\u09e6 VDC-\u098f\u09b0 \u099c\u09a8\u09cd\u09af \u09b0\u09c7\u099f \u0995\u09b0\u09be \u09b9\u09df, \u09a4\u09ac\u09c7 \u098f\u099f\u09bf \u0995\u09be\u09b0\u09cd\u09af\u0995\u09b0\u09ad\u09be\u09ac\u09c7 \u0986\u09a8\u09cd\u09a1\u09be\u09b0-\u09b0\u09c7\u099f\u09c7\u09a1, \u09af\u09a6\u09bf\u0993 \u0989\u09a6\u09cd\u09a7\u09c3\u09a4\u09bf \u09b6\u09c0\u099f\u09c7 \u09b8\u09ac\u0995\u09bf\u099b\u09c1 \u09a0\u09bf\u0995\u09a0\u09be\u0995 \u09a6\u09c7\u0996\u09be\u099a\u09cd\u099b\u09bf\u09b2\u0964.<\/p>\n<p>\u098f\u099f\u09bf \u098f\u0995\u099f\u09bf \u0995\u09be\u09b0\u09a3 \u09af\u09c7 \u09aa\u09bf\u09ad\u09bf \u09b8\u09bf\u09b8\u09cd\u099f\u09c7\u09ae\u09c7 \u098f\u0995\u099f\u09bf \u09a1\u09bf\u09b8\u09bf \u0986\u0987\u09b8\u09cb\u09b2\u09c7\u099f\u09b0\u0995\u09c7 \u0985\u09a8\u09cd\u09af\u09be\u09a8\u09cd\u09af \u0989\u099a\u09cd\u099a-\u099d\u09c1\u0981\u0995\u09bf\u09b0 \u09a1\u09bf\u09b8\u09bf \u09b8\u09b0\u099e\u09cd\u099c\u09be\u09ae\u09c7\u09b0 \u09ae\u09a4\u09cb \u098f\u0995\u0987 \u09aa\u09cd\u09b0\u0995\u09cc\u09b6\u09b2\u0997\u09a4 \u09a8\u09bf\u09df\u09ae \u09ae\u09c7\u09a8\u09c7 \u09aa\u09b0\u09cd\u09af\u09be\u09b2\u09cb\u099a\u09a8\u09be \u0995\u09b0\u09be \u0989\u099a\u09bf\u09a4\u0964.<\/p>\n<h3>\u09a6\u09cd\u09b0\u09c1\u09a4 \u09ad\u09cb\u09b2\u09cd\u099f\u09c7\u099c \u09aa\u09b0\u09c0\u0995\u09cd\u09b7\u09be \u0995\u09b0\u09be\u09b0 \u0989\u09a6\u09be\u09b9\u09b0\u09a3<\/h3>\n<table style=\"border-collapse: collapse; width: 100%; text-align: left; margin-bottom: 20px;\" border=\"1\" cellspacing=\"0\" cellpadding=\"8\">\n<thead>\n<tr>\n<th>\u09aa\u09b0\u09bf\u09b8\u09cd\u09a5\u09bf\u09a4\u09bf<\/th>\n<th>\u09b8\u09bf\u09b8\u09cd\u099f\u09c7\u09ae \u09b2\u09c7\u09ac\u09c7\u09b2<\/th>\n<th>\u09aa\u09cd\u09b0\u0995\u09c3\u09a4 \u09a0\u09be\u09a8\u09cd\u09a1\u09be-\u09b8\u0995\u09be\u09b2\u09c7\u09b0 Voc<\/th>\n<th>\u09aa\u09cd\u09b0\u09df\u09cb\u099c\u09a8\u09c0\u09df \u09b8\u09b0\u09cd\u09ac\u09a8\u09bf\u09ae\u09cd\u09a8 Ue<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>\u099b\u09be\u09a6\u09c7\u09b0 \u09aa\u09bf\u09ad\u09bf, \u09a8\u09be\u09a4\u09bf\u09b6\u09c0\u09a4\u09cb\u09b7\u09cd\u09a3 \u099c\u09b2\u09ac\u09be\u09df\u09c1<\/strong><\/td>\n<td>\u09e7\u09e6\u09e6\u09e6 \u09ad\u09bf\u09a1\u09bf\u09b8\u09bf<\/td>\n<td>\u09e7\u09e6\u09e9\u09eb V<\/td>\n<td>\u0995\u09ae\u09aa\u0995\u09cd\u09b7\u09c7 \u09e7\u09e6\u09e9\u09eb VDC-\u098f\u09b0 \u0989\u09aa\u09b0\u09c7, \u09aa\u09cd\u09b0\u0995\u09b2\u09cd\u09aa\u09c7\u09b0 \u09aa\u09cd\u09b0\u09df\u09cb\u099c\u09a8 \u0985\u09a8\u09c1\u09af\u09be\u09df\u09c0 \u09ae\u09be\u09b0\u09cd\u099c\u09bf\u09a8\u09b8\u09b9<\/td>\n<\/tr>\n<tr>\n<td><strong>\u0987\u0989\u099f\u09bf\u09b2\u09bf\u099f\u09bf-\u09b8\u09cd\u0995\u09c7\u09b2 \u09aa\u09bf\u09ad\u09bf, \u09a0\u09be\u09a8\u09cd\u09a1\u09be \u0985\u099e\u09cd\u099a\u09b2<\/strong><\/td>\n<td>\u09e7\u09eb\u09e6\u09e6 \u09ad\u09bf\u09a1\u09bf\u09b8\u09bf<\/td>\n<td>\u09e7\u09eb\u09ea\u09e6 V<\/td>\n<td>\u09b8\u09a4\u09b0\u09cd\u0995\u09a4\u09be\u09b0 \u09b8\u09be\u09a5\u09c7 \u09b8\u09cd\u099f\u09cd\u09b0\u09bf\u0982 \u09a1\u09bf\u099c\u09be\u0987\u09a8 \u0985\u09a5\u09ac\u09be \u0989\u09aa\u09af\u09c1\u0995\u09cd\u09a4 \u09b0\u09c7\u099f\u09bf\u0982\u09af\u09c1\u0995\u09cd\u09a4 \u0989\u099a\u09cd\u099a-\u09ad\u09cb\u09b2\u09cd\u099f\u09c7\u099c\u09c7\u09b0 \u09b8\u09ae\u09be\u09a7\u09be\u09a8 \u09aa\u09cd\u09b0\u09df\u09cb\u099c\u09a8<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u09ae\u09c2\u09b2 \u09ac\u09bf\u09b7\u09df \u09b9\u09b2: \u09b8\u09ac\u09b8\u09ae\u09df \u09b8\u09bf\u09b8\u09cd\u099f\u09c7\u09ae \u09a8\u09c7\u09ae\u09aa\u09cd\u09b2\u09c7\u099f\u09c7\u09b0 \u09aa\u09b0\u09bf\u09ac\u09b0\u09cd\u09a4\u09c7 \u09b8\u09ac\u099a\u09c7\u09df\u09c7 \u0996\u09be\u09b0\u09be\u09aa \u09aa\u09b0\u09bf\u09b8\u09cd\u09a5\u09bf\u09a4\u09bf\u09a4\u09c7 \u09b8\u0982\u09b6\u09cb\u09a7\u09bf\u09a4 Voc-\u098f\u09b0 \u09ac\u09bf\u09aa\u09b0\u09c0\u09a4\u09c7 \u09ad\u09cb\u09b2\u09cd\u099f\u09c7\u099c \u09b0\u09c7\u099f\u09bf\u0982 \u09a8\u09bf\u09b0\u09cd\u09a7\u09be\u09b0\u09a3 \u0995\u09b0\u09c1\u09a8\u0964.<\/p>\n<h2>\u0995\u09be\u09b0\u09c7\u09a8\u09cd\u099f \u09b0\u09c7\u099f\u09bf\u0982: \u09b6\u09c1\u09a7\u09c1\u09ae\u09be\u09a4\u09cd\u09b0 \u098f\u0995\u099f\u09bf \u0985\u09cd\u09af\u09be\u09ae\u09cd\u09aa \u09b8\u0982\u0996\u09cd\u09af\u09be \u09a8\u09df<\/h2>\n<p>\u09aa\u09b0\u09ac\u09b0\u09cd\u09a4\u09c0 \u0986\u0987\u099f\u09c7\u09ae\u099f\u09bf \u09b9\u09b2 \u0995\u09be\u09b0\u09c7\u09a8\u09cd\u099f \u09b0\u09c7\u099f\u09bf\u0982, \u09af\u09be \u09aa\u09cd\u09b0\u09be\u09df\u09b6\u0987 \u098f\u09ad\u09be\u09ac\u09c7 \u09a6\u09c7\u0996\u09be\u09a8\u09cb \u09b9\u09df <code>Ie<\/code>.<\/p>\n<h3>\u0995\u09be\u09b0\u09c7\u09a8\u09cd\u099f \u09b0\u09c7\u099f\u09bf\u0982 \u09ae\u09be\u09a8\u09c7 \u0995\u09c0<\/h3>\n<p>The current rating tells you how much current the isolator can carry continuously under the conditions defined by the product standard and the manufacturer. In real projects, that number should be checked against:<\/p>\n<ul>\n<li>expected operating current<\/li>\n<li>ambient temperature at the installation site<\/li>\n<li>altitude where relevant<\/li>\n<li>enclosure heating effects<\/li>\n<li>conductor grouping<\/li>\n<li>installation orientation, if specified by the manufacturer<\/li>\n<\/ul>\n<h3>Why current rating alone does not tell the full story<\/h3>\n<p>Two isolators both labeled <code>\u09e9\u09e8 A<\/code> may not be equally suitable in every situation.<\/p>\n<table style=\"border-collapse: collapse; width: 100%; text-align: left; margin-bottom: 20px;\" border=\"1\" cellspacing=\"0\" cellpadding=\"8\">\n<thead>\n<tr>\n<th>\u09ab\u09cd\u09af\u09be\u0995\u09cd\u099f\u09b0<\/th>\n<th>Isolator A (32 A)<\/th>\n<th>Isolator B (32 A)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>Enclosure type<\/strong><\/td>\n<td>Ventilated indoor panel<\/td>\n<td>Sealed outdoor PV combiner box, 55 \u00b0C ambient<\/td>\n<\/tr>\n<tr>\n<td><strong>\u09ac\u09cd\u09af\u09ac\u09b9\u09be\u09b0\u09c7\u09b0 \u09ac\u09bf\u09ad\u09be\u0997<\/strong><\/td>\n<td>\u09a1\u09bf\u09b8\u09bf-\u09e8\u09e7\u09ac\u09bf<\/td>\n<td>DC-PV2<\/td>\n<\/tr>\n<tr>\n<td><strong>\u09ae\u09c7\u09b0\u09c1 \u0995\u09a8\u09ab\u09bf\u0997\u09be\u09b0\u09c7\u09b6\u09a8<\/strong><\/td>\n<td>2P \u09b8\u09ae\u09cd\u09aa\u09b0\u09cd\u0995\u09c7<\/td>\n<td>\u09ea\u09aa\u09bf<\/td>\n<\/tr>\n<tr>\n<td><strong>Practical suitability for a 30 A rooftop PV string<\/strong><\/td>\n<td>May need derating due to temperature<\/td>\n<td>May be more suitable, pending full design review<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>The point is not that one is always better than the other. It is that current should always be read alongside voltage and utilization category, not in isolation.<\/p>\n<h2>Poles: What 2P and 4P Actually Mean<\/h2>\n<p>Pole configuration tells you how many conductors the switch opens at the same time.<\/p>\n<h3>2-pole isolator<\/h3>\n<p>\u0995 <strong>2P \u09b8\u09ae\u09cd\u09aa\u09b0\u09cd\u0995\u09c7<\/strong> DC isolator is commonly used where one positive and one negative conductor are disconnected together for a single string or single DC circuit.<\/p>\n<h3>4-pole isolator<\/h3>\n<p>\u0995 <strong>\u09ea\u09aa\u09bf<\/strong> DC isolator is commonly used in applications where two strings or a different conductor arrangement are being disconnected with one device, or where the internal switching path is configured to manage higher DC voltage using series-connected poles.<\/p>\n<h3>Why the pole count deserves more attention than it usually gets<\/h3>\n<p>It is easy to think of poles as a simple wiring convenience. In practice, pole count can affect:<\/p>\n<ul>\n<li>how conductors are actually interrupted<\/li>\n<li>the maximum usable voltage, where series-connected poles may extend capability<\/li>\n<li>internal contact configuration<\/li>\n<li>the accepted wiring method<\/li>\n<\/ul>\n<p>A 4-pole switch is not simply \u201ca bigger 2-pole switch.\u201d The manufacturer\u2019s connection diagram still determines how the poles should be wired, and getting this wrong can create safety issues.<\/p>\n<p>If wiring method is your main question, the next relevant page is <a href=\"https:\/\/test.viox.com\/bn\/connection-of-dc-isolators\/\">\u09a1\u09bf\u09b8\u09bf \u0986\u0987\u09b8\u09cb\u09b2\u09c7\u099f\u09b0\u09c7\u09b0 \u09b8\u0982\u09af\u09cb\u0997<\/a>.<\/p>\n<h2>Utilization Category: The Rating Most People Skip and Shouldn\u2019t<\/h2>\n<p>This is one of the most important lines on a DC isolator spec sheet and one of the most overlooked.<\/p>\n<h3>What utilization category means, in plain language<\/h3>\n<p>Think of utilization category as the test scenario the switch went through before it was allowed to carry that label. Under <strong>\u0986\u0987\u0987\u09b8\u09bf 60947-3<\/strong>, every DC isolator is tested against a specific switching duty, meaning a defined combination of voltage, current, load type, and number of switching operations.<\/p>\n<p>The utilization category printed on the label tells you which test scenario the switch passed. In practical terms, it answers:<\/p>\n<ul>\n<li>was this switch tested only for basic, well-behaved resistive loads?<\/li>\n<li>or was it tested for more demanding conditions involving inductive loads or photovoltaic-specific behavior?<\/li>\n<\/ul>\n<h3>General DC categories: DC-21B and DC-22B<\/h3>\n<p>At a simplified level:<\/p>\n<ul>\n<li><strong>\u09a1\u09bf\u09b8\u09bf-\u09e8\u09e7\u09ac\u09bf<\/strong> covers resistive or slightly inductive DC loads<\/li>\n<li><strong>\u09a1\u09bf\u09b8\u09bf-\u09e8\u09e8\u09ac\u09bf<\/strong> covers mixed resistive and inductive switching conditions<\/li>\n<\/ul>\n<p>If your application involves straightforward resistive DC loads, DC-21B may be sufficient. For more demanding mixed-load conditions, DC-22B gives a stronger basis.<\/p>\n<h3>PV-specific categories: DC-PV1 and DC-PV2<\/h3>\n<p>When the application is specifically solar PV, two additional categories become highly relevant:<\/p>\n<ul>\n<li><strong>DC-PV1<\/strong> is associated with standard PV switching duty, where significant overcurrents are not expected to dominate the switching event<\/li>\n<li><strong>DC-PV2<\/strong> is associated with more demanding photovoltaic switching conditions, including cases where reverse current flow or more severe overcurrent conditions may be present<\/li>\n<\/ul>\n<p>In many rooftop and commercial PV projects, designers prefer <strong>DC-PV2<\/strong> because it aligns better with more demanding photovoltaic switching scenarios. The final choice, however, should still follow the actual project architecture and switching duty.<\/p>\n<h3>A practical comparison<\/h3>\n<table style=\"border-collapse: collapse; width: 100%; text-align: left; margin-bottom: 20px;\" border=\"1\" cellspacing=\"0\" cellpadding=\"8\">\n<thead>\n<tr>\n<th>\u0986\u09ac\u09c7\u09a6\u09a8<\/th>\n<th>Minimum recommended category<\/th>\n<th>\u0995\u09c7\u09a8<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>Simple DC resistive load, industrial panel<\/strong><\/td>\n<td>\u09a1\u09bf\u09b8\u09bf-\u09e8\u09e7\u09ac\u09bf<\/td>\n<td>Load is predictable, with no PV-specific behavior<\/td>\n<\/tr>\n<tr>\n<td><strong>DC motor circuit<\/strong><\/td>\n<td>\u09a1\u09bf\u09b8\u09bf-\u09e8\u09e8\u09ac\u09bf<\/td>\n<td>Inductive load creates more demanding switching conditions<\/td>\n<\/tr>\n<tr>\n<td><strong>Rooftop PV string isolator<\/strong><\/td>\n<td>DC-PV1 or DC-PV2<\/td>\n<td>PV-specific duty; DC-PV2 is often preferred where switching conditions are more demanding<\/td>\n<\/tr>\n<tr>\n<td><strong>Utility-scale PV with parallel strings<\/strong><\/td>\n<td>\u09aa\u09cd\u09b0\u09be\u09af\u09bc\u09b6\u0987 DC-PV2<\/td>\n<td>\u09ac\u09bf\u09aa\u09b0\u09c0\u09a4-\u0995\u09be\u09b0\u09c7\u09a8\u09cd\u099f \u09aa\u09be\u09a5 \u098f\u09ac\u0982 \u0989\u099a\u09cd\u099a \u09ab\u09b2\u09cd\u099f \u09b6\u0995\u09cd\u09a4\u09bf \u09b8\u09be\u09a7\u09be\u09b0\u09a3\u09a4 \u0986\u09b0\u0993 \u09ac\u09c7\u09b6\u09bf \u099a\u09be\u09b9\u09bf\u09a6\u09be\u09aa\u09c2\u09b0\u09cd\u09a3 \u09aa\u09bf\u09ad\u09bf \u09a1\u09bf\u0989\u099f\u09bf\u0995\u09c7 \u09b8\u09ae\u09b0\u09cd\u09a5\u09a8 \u0995\u09b0\u09c7<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>\u0986\u09aa\u09a8\u09bf \u09af\u0996\u09a8 \u09aa\u09a3\u09cd\u09af \u09a4\u09c1\u09b2\u09a8\u09be \u0995\u09b0\u09c7\u09a8 \u09a4\u0996\u09a8 \u098f\u099f\u09bf \u0995\u09c7\u09a8 \u0997\u09c1\u09b0\u09c1\u09a4\u09cd\u09ac\u09aa\u09c2\u09b0\u09cd\u09a3<\/h3>\n<p>\u098f\u0995\u099c\u09a8 \u0995\u09cd\u09b0\u09c7\u09a4\u09be \u09aa\u09be\u09b6\u09be\u09aa\u09be\u09b6\u09bf \u09a6\u09c1\u099f\u09bf \u0986\u0987\u09b8\u09cb\u09b2\u09c7\u099f\u09b0 \u09a6\u09c7\u0996\u09a4\u09c7 \u09aa\u09be\u09b0\u09c7\u09a8:<\/p>\n<ul>\n<li><strong>\u09aa\u09a3\u09cd\u09af X:<\/strong> <code>1000 VDC, 32 A, 4P, DC-21B<\/code><\/li>\n<li><strong>\u09aa\u09a3\u09cd\u09af Y:<\/strong> <code>1000 VDC, 32 A, 4P, DC-PV2<\/code><\/li>\n<\/ul>\n<p>\u09ad\u09cb\u09b2\u09cd\u099f\u09c7\u099c, \u0995\u09be\u09b0\u09c7\u09a8\u09cd\u099f \u098f\u09ac\u0982 \u09aa\u09cb\u09b2 \u09b8\u0982\u0996\u09cd\u09af\u09be \u098f\u0995\u0987\u0964 \u09a4\u09ac\u09c7 \u09aa\u09a3\u09cd\u09af X \u098f\u0995\u099f\u09bf \u09b8\u09be\u09a7\u09be\u09b0\u09a3 \u09aa\u09cd\u09b0\u09a4\u09bf\u09b0\u09cb\u09a7\u09c0 \u09a1\u09bf\u09b8\u09bf \u09a1\u09bf\u0989\u099f\u09bf\u09b0 \u099c\u09a8\u09cd\u09af \u09aa\u09b0\u09c0\u0995\u09cd\u09b7\u09be \u0995\u09b0\u09be \u09b9\u09af\u09bc\u09c7\u099b\u09bf\u09b2, \u09af\u09c7\u0996\u09be\u09a8\u09c7 \u09aa\u09a3\u09cd\u09af Y \u09ac\u09bf\u09b6\u09c7\u09b7\u09ad\u09be\u09ac\u09c7 \u09ab\u09cb\u099f\u09cb\u09ad\u09cb\u09b2\u099f\u09be\u0987\u0995 \u09b8\u09cd\u09af\u09c1\u0987\u099a\u09bf\u0982 \u0985\u09ac\u09b8\u09cd\u09a5\u09be\u09b0 \u099c\u09a8\u09cd\u09af \u09aa\u09b0\u09c0\u0995\u09cd\u09b7\u09be \u0995\u09b0\u09be \u09b9\u09af\u09bc\u09c7\u099b\u09bf\u09b2\u0964 \u098f\u0995\u099f\u09bf \u09aa\u09bf\u09ad\u09bf \u0985\u09cd\u09af\u09be\u09aa\u09cd\u09b2\u09bf\u0995\u09c7\u09b6\u09a8\u09c7\u09b0 \u099c\u09a8\u09cd\u09af, \u09aa\u09a3\u09cd\u09af Y \u09aa\u09cd\u09b0\u09be\u09af\u09bc\u09b6\u0987 \u0986\u09b0\u0993 \u0989\u09aa\u09af\u09c1\u0995\u09cd\u09a4 \u09aa\u099b\u09a8\u09cd\u09a6, \u098f\u09ae\u09a8\u0995\u09bf \u09af\u09a6\u09bf\u0993 \u09aa\u09a3\u09cd\u09af X \u09aa\u09cd\u09b0\u09a5\u09ae \u09a8\u099c\u09b0\u09c7 \u09b8\u09ae\u09a4\u09c1\u09b2\u09cd\u09af \u09ae\u09a8\u09c7 \u09b9\u09a4\u09c7 \u09aa\u09be\u09b0\u09c7\u0964.<\/p>\n<p>\u0987\u0989\u099f\u09bf\u09b2\u09be\u0987\u099c\u09c7\u09b6\u09a8 \u0995\u09cd\u09af\u09be\u099f\u09be\u0997\u09b0\u09bf \u09aa\u09cd\u09b0\u09be\u09af\u09bc\u09b6\u0987 \u098f\u0995\u099f\u09bf \u09b8\u09a0\u09bf\u0995 \u09aa\u09cd\u09b0\u0995\u09cc\u09b6\u09b2 \u09aa\u099b\u09a8\u09cd\u09a6\u0995\u09c7 \u098f\u0995\u099f\u09bf \u09ac\u09be\u09b9\u09cd\u09af\u09bf\u0995 \u0995\u09cd\u09af\u09be\u099f\u09be\u09b2\u0997 \u09ae\u09bf\u09b2 \u09a5\u09c7\u0995\u09c7 \u09aa\u09c3\u09a5\u0995 \u0995\u09b0\u09c7\u0964.<\/p>\n<h2>\u0995\u09c0\u09ad\u09be\u09ac\u09c7 \u098f\u0995\u099f\u09bf \u09ac\u09be\u09b8\u09cd\u09a4\u09ac \u0989\u09a6\u09be\u09b9\u09b0\u09a3 \u09b2\u09c7\u09ac\u09c7\u09b2 \u09aa\u09a1\u09bc\u09ac\u09c7\u09a8<\/h2>\n<p>\u0995\u09b2\u09cd\u09aa\u09a8\u09be \u0995\u09b0\u09c1\u09a8 \u0986\u09aa\u09a8\u09bf \u098f\u0987\u09b0\u0995\u09ae \u099a\u09bf\u09b9\u09cd\u09a8\u09bf\u09a4 \u098f\u0995\u099f\u09bf \u09a1\u09bf\u09b8\u09bf \u0986\u0987\u09b8\u09cb\u09b2\u09c7\u099f\u09b0 \u09a6\u09c7\u0996\u099b\u09c7\u09a8:<\/p>\n<p><code>1000 VDC, 32 A, 4P, IEC 60947-3, DC-PV2<\/code><\/p>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/Annotated-DC-isolator-switch-label-showing-how-to-identify-key-photovoltaic-ratings.webp\" alt=\"Annotated DC isolator switch label showing how to identify key photovoltaic ratings\" \/><figcaption style=\"font-style: italic; color: #555; margin-top: 8px;\">\u098f\u0995\u099f\u09bf \u09ac\u09be\u09b8\u09cd\u09a4\u09ac \u09a1\u09bf\u09b8\u09bf \u0986\u0987\u09b8\u09cb\u09b2\u09c7\u099f\u09b0 \u09b8\u09c1\u0987\u099a \u09b2\u09c7\u09ac\u09c7\u09b2 \u098f\u09ac\u0982 \u098f\u09b0 \u09ae\u09c2\u09b2 \u09ab\u09cb\u099f\u09cb\u09ad\u09cb\u09b2\u099f\u09be\u0987\u0995 \u09b0\u09c7\u099f\u09bf\u0982\u0997\u09c1\u09b2\u09bf \u09ad\u09c7\u0999\u09c7 \u098f\u0995\u099f\u09bf \u099f\u09c0\u0995\u09be\u09af\u09c1\u0995\u09cd\u09a4 \u0997\u09be\u0987\u09a1\u0964.<\/figcaption><\/figure>\n<p>\u098f\u0996\u09be\u09a8\u09c7 \u09aa\u09cd\u09b0\u09a4\u09bf\u099f\u09bf \u0989\u09aa\u09be\u09a6\u09be\u09a8 \u0986\u09aa\u09a8\u09be\u0995\u09c7 \u0995\u09c0 \u09ac\u09b2\u09c7:<\/p>\n<ul>\n<li><code>\u09e7\u09e6\u09e6\u09e6 \u09ad\u09bf\u09a1\u09bf\u09b8\u09bf<\/code> - \u09b8\u09c1\u0987\u099a\u099f\u09bf \u0989\u09b2\u09cd\u09b2\u09bf\u0996\u09bf\u09a4 \u09a1\u09bf\u0989\u099f\u09bf\u09b0 \u0985\u09a7\u09c0\u09a8\u09c7 1000 V \u09aa\u09b0\u09cd\u09af\u09a8\u09cd\u09a4 \u09a1\u09bf\u09b8\u09bf \u09b8\u09bf\u09b8\u09cd\u099f\u09c7\u09ae\u09c7\u09b0 \u099c\u09a8\u09cd\u09af \u09a4\u09c8\u09b0\u09bf \u0995\u09b0\u09be \u09b9\u09af\u09bc\u09c7\u099b\u09c7<\/li>\n<li><code>\u09e9\u09e8 A<\/code> - \u098f\u099f\u09bf \u09a4\u09be\u09b0 \u09b8\u0982\u099c\u09cd\u099e\u09be\u09af\u09bc\u09bf\u09a4 \u0985\u09ac\u09b8\u09cd\u09a5\u09be\u09b0 \u0985\u09a7\u09c0\u09a8\u09c7 \u098f\u0995\u099f\u09be\u09a8\u09be 32 A \u09aa\u09b0\u09cd\u09af\u09a8\u09cd\u09a4 \u09ac\u09b9\u09a8 \u0995\u09b0\u09a4\u09c7 \u09aa\u09be\u09b0\u09c7<\/li>\n<li><code>\u09ea\u09aa\u09bf<\/code> - \u098f\u099f\u09bf \u099a\u09be\u09b0\u099f\u09bf \u09aa\u09cb\u09b2 \u09ac\u09cd\u09af\u09ac\u09b9\u09be\u09b0 \u0995\u09b0\u09c7, \u09af\u09be \u0985\u09ad\u09cd\u09af\u09a8\u09cd\u09a4\u09b0\u09c0\u09a3 \u09b8\u09cd\u09af\u09c1\u0987\u099a\u09bf\u0982 \u09ac\u09cd\u09af\u09ac\u09b8\u09cd\u09a5\u09be \u09ac\u09be \u09b8\u09be\u09b0\u09cd\u0995\u09bf\u099f \u0986\u09b0\u09cd\u0995\u09bf\u099f\u09c7\u0995\u099a\u09be\u09b0\u09c7\u09b0 \u099c\u09a8\u09cd\u09af \u09aa\u09cd\u09b0\u09af\u09bc\u09cb\u099c\u09a8 \u09b9\u09a4\u09c7 \u09aa\u09be\u09b0\u09c7<\/li>\n<li><code>\u0986\u0987\u0987\u09b8\u09bf 60947-3<\/code> - \u09b8\u09c1\u0987\u099a\u099f\u09bf \u09aa\u09cd\u09b0\u09be\u09b8\u0999\u09cd\u0997\u09bf\u0995 \u0986\u0987\u0987\u09b8\u09bf \u09b8\u09c1\u0987\u099a-\u09a1\u09bf\u09b8\u0995\u09be\u09a8\u09c7\u0995\u09cd\u099f\u09b0 \u09ae\u09be\u09a8\u09c7\u09b0 \u09b8\u09be\u09a5\u09c7 \u09b8\u09be\u09b0\u09bf\u09ac\u09a6\u09cd\u09a7<\/li>\n<li><code>DC-PV2<\/code> - \u09b8\u09c1\u0987\u099a\u099f\u09bf \u0986\u09b0\u0993 \u09ac\u09c7\u09b6\u09bf \u099a\u09be\u09b9\u09bf\u09a6\u09be\u09aa\u09c2\u09b0\u09cd\u09a3 \u09ab\u09cb\u099f\u09cb\u09ad\u09cb\u09b2\u099f\u09be\u0987\u0995 \u09b8\u09cd\u09af\u09c1\u0987\u099a\u09bf\u0982 \u09a1\u09bf\u0989\u099f\u09bf\u09b0 \u099c\u09a8\u09cd\u09af \u09aa\u09b0\u09c0\u0995\u09cd\u09b7\u09be \u0995\u09b0\u09be \u09b9\u09af\u09bc\u09c7\u099b\u09bf\u09b2<\/li>\n<\/ul>\n<h3>\u09aa\u09cd\u09b0\u0995\u09cc\u09b6\u09b2 \u09ab\u09b2\u09cb-\u0986\u09aa<\/h3>\n<p>\u09b2\u09c7\u09ac\u09c7\u09b2 \u09aa\u09a1\u09bc\u09be \u09b6\u09c1\u09a7\u09c1\u09ae\u09be\u09a4\u09cd\u09b0 \u09aa\u09cd\u09b0\u09a5\u09ae \u09a7\u09be\u09aa\u0964 \u09b8\u09a0\u09bf\u0995 \u09ab\u09b2\u09cb-\u0986\u09aa \u09aa\u09cd\u09b0\u09b6\u09cd\u09a8\u0997\u09c1\u09b2\u09bf \u09b9\u09b2:<\/p>\n<ul>\n<li>\u09a0\u09be\u09a8\u09cd\u09a1\u09be-\u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09b8\u0982\u09b6\u09cb\u09a7\u09a8 \u09b8\u09b9 \u0986\u09ae\u09be\u09b0 \u09aa\u09cd\u09b0\u0995\u09c3\u09a4 \u09b8\u09b0\u09cd\u09ac\u09cb\u099a\u09cd\u099a \u09b8\u09bf\u09b8\u09cd\u099f\u09c7\u09ae \u09ad\u09cb\u09b2\u09cd\u099f\u09c7\u099c \u0995\u09a4?<\/li>\n<li>\u0986\u09ae\u09bf \u0995\u09cb\u09a8 \u0995\u09a8\u09cd\u09a1\u09be\u0995\u09cd\u099f\u09b0 \u09ac\u09cd\u09af\u09ac\u09b8\u09cd\u09a5\u09be \u09b8\u0982\u09af\u09cb\u0997 \u09ac\u09bf\u099a\u09cd\u099b\u09bf\u09a8\u09cd\u09a8 \u0995\u09b0\u099b\u09bf, \u098f\u09ac\u0982 \u09aa\u09cb\u09b2 \u0995\u09a8\u09ab\u09bf\u0997\u09be\u09b0\u09c7\u09b6\u09a8 \u0995\u09bf \u09ae\u09c7\u09b2\u09c7?<\/li>\n<li>\u09ac\u09be\u09b8\u09cd\u09a4\u09ac \u09b2\u09cb\u09a1 \u0985\u09ac\u09b8\u09cd\u09a5\u09be \u0995\u09c0: \u09aa\u09cd\u09b0\u09a4\u09bf\u09b0\u09cb\u09a7\u09c0, \u0987\u09a8\u09cd\u09a1\u09be\u0995\u099f\u09bf\u09ad, \u09a8\u09be\u0995\u09bf \u09aa\u09bf\u09ad\u09bf-\u09a8\u09bf\u09b0\u09cd\u09a6\u09bf\u09b7\u09cd\u099f?<\/li>\n<li>\u098f\u0987 \u0987\u0989\u099f\u09bf\u09b2\u09be\u0987\u099c\u09c7\u09b6\u09a8 \u0995\u09cd\u09af\u09be\u099f\u09be\u0997\u09b0\u09bf \u0995\u09bf \u098f\u0987 \u09b8\u09cd\u09af\u09c1\u0987\u099a\u09bf\u0982 \u09a1\u09bf\u0989\u099f\u09bf\u09b0 \u099c\u09a8\u09cd\u09af \u0989\u09aa\u09af\u09c1\u0995\u09cd\u09a4?<\/li>\n<\/ul>\n<h2>\u09b0\u09c7\u099f\u09bf\u0982 \u09a8\u09bf\u09b0\u09cd\u09ac\u09be\u099a\u09a8 \u09b8\u09bf\u09a6\u09cd\u09a7\u09be\u09a8\u09cd\u09a4 \u09aa\u09cd\u09b0\u09ac\u09be\u09b9<\/h2>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/Technical-decision-flowchart-for-selecting-a-DC-isolator-switch-based-on-voltage-current-poles-and-utilization-category.webp\" alt=\"Technical decision flowchart for selecting a DC isolator switch based on voltage current poles and utilization category\" \/><figcaption style=\"font-style: italic; color: #555; margin-top: 8px;\">\u09ad\u09cb\u09b2\u09cd\u099f\u09c7\u099c, \u0995\u09be\u09b0\u09c7\u09a8\u09cd\u099f, \u09aa\u09cb\u09b2 \u098f\u09ac\u0982 \u0987\u0989\u099f\u09bf\u09b2\u09be\u0987\u099c\u09c7\u09b6\u09a8 \u0995\u09cd\u09af\u09be\u099f\u09be\u0997\u09b0\u09bf\u09b0 \u0989\u09aa\u09b0 \u09ad\u09bf\u09a4\u09cd\u09a4\u09bf \u0995\u09b0\u09c7 \u09b8\u09a0\u09bf\u0995\u09ad\u09be\u09ac\u09c7 \u09a1\u09bf\u09b8\u09bf \u0986\u0987\u09b8\u09cb\u09b2\u09c7\u099f\u09b0 \u09b8\u09c1\u0987\u099a \u09a8\u09bf\u09b0\u09cd\u09ac\u09be\u099a\u09a8 \u0995\u09b0\u09be\u09b0 \u099c\u09a8\u09cd\u09af \u098f\u0995\u099f\u09bf 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\u0985\u09cd\u09af\u09be\u09aa\u09cd\u09b2\u09bf\u0995\u09c7\u09b6\u09a8\u0997\u09c1\u09b2\u09bf\u09b0 \u099c\u09a8\u09cd\u09af, DC-PV1 \u09ac\u09be DC-PV2 \u09b8\u09a8\u09cd\u09a7\u09be\u09a8 \u0995\u09b0\u09c1\u09a8\u0964 \u09b8\u09be\u09a7\u09be\u09b0\u09a3 \u09a1\u09bf\u09b8\u09bf \u0985\u09cd\u09af\u09be\u09aa\u09cd\u09b2\u09bf\u0995\u09c7\u09b6\u09a8\u0997\u09c1\u09b2\u09bf\u09b0 \u099c\u09a8\u09cd\u09af, \u09a8\u09bf\u09b6\u09cd\u099a\u09bf\u09a4 \u0995\u09b0\u09c1\u09a8 \u09af\u09c7 DC-21B \u09ac\u09be DC-22B \u09b2\u09cb\u09a1\u09c7\u09b0 \u09a7\u09b0\u09a3\u09c7\u09b0 \u09b8\u09be\u09a5\u09c7 \u09ae\u09c7\u09b2\u09c7\u0964 \u09af\u09a6\u09bf \u0987\u0989\u099f\u09bf\u09b2\u09be\u0987\u099c\u09c7\u09b6\u09a8 \u0995\u09cd\u09af\u09be\u099f\u09be\u0997\u09b0\u09bf \u0985\u09a8\u09c1\u09aa\u09b8\u09cd\u09a5\u09bf\u09a4 \u09ac\u09be \u0985\u09b8\u09cd\u09aa\u09b7\u09cd\u099f \u09b9\u09af\u09bc \u09a4\u09ac\u09c7 \u098f\u099f\u09bf\u0995\u09c7 \u098f\u0995\u099f\u09bf 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<strong>\u09ac\u09be \u09b8\u09ae\u09a4\u09c1\u09b2\u09cd\u09af \u0989\u09aa\u09af\u09c1\u0995\u09cd\u09a4\u09a4\u09be\u0964 \u0985\u09b8\u09cd\u099f\u09cd\u09b0\u09c7\u09b2\u09bf\u09af\u09bc\u09be \u098f\u09ac\u0982 \u09a8\u09bf\u0989\u099c\u09bf\u09b2\u09cd\u09af\u09be\u09a8\u09cd\u09a1\u09c7,<\/strong> \u0989\u09a4\u09cd\u09a4\u09b0 \u0986\u09ae\u09c7\u09b0\u09bf\u0995\u09be\u09b0 \u09ab\u09cb\u099f\u09cb\u09ad\u09cb\u09b2\u099f\u09be\u0987\u0995 \u09aa\u09cd\u09b0\u09c7\u0995\u09cd\u09b7\u09be\u09aa\u099f\u09c7\u0964.<\/p>\n<p>\u09af\u09a6\u09bf \u09a1\u09bf\u09ad\u09be\u0987\u09b8\u099f\u09bf \u099b\u09af\u09bc\u099f\u09bf \u099a\u09c7\u0995 \u09aa\u09be\u09b8 \u0995\u09b0\u09c7 \u09a4\u09ac\u09c7 \u098f\u099f\u09bf \u09ac\u09bf\u09b8\u09cd\u09a4\u09be\u09b0\u09bf\u09a4 \u09aa\u09cd\u09b0\u0995\u09cc\u09b6\u09b2 \u09aa\u09b0\u09cd\u09af\u09be\u09b2\u09cb\u099a\u09a8\u09be\u09b0 \u09a6\u09bf\u0995\u09c7 \u09af\u09c7\u09a4\u09c7 \u09aa\u09be\u09b0\u09c7\u0964 \u09af\u09a6\u09bf \u098f\u099f\u09bf \u0995\u09cb\u09a8\u0993 \u09a7\u09be\u09aa\u09c7 \u09ac\u09cd\u09af\u09b0\u09cd\u09a5 \u09b9\u09af\u09bc \u09a4\u09ac\u09c7 \u09aa\u09a3\u09cd\u09af \u09a8\u09bf\u09b0\u09cd\u09ac\u09be\u099a\u09a8 \u09aa\u09b0\u09cd\u09af\u09be\u09af\u09bc\u09c7 \u09ab\u09bf\u09b0\u09c7 \u09af\u09be\u09a8\u0964.<\/p>\n<h2>\u09b8\u09be\u09a7\u09be\u09b0\u09a3 \u09aa\u09a1\u09bc\u09be\u09b0 \u09ad\u09c1\u09b2 \u098f\u09ac\u0982 \u09b8\u09c7\u0997\u09c1\u09b2\u09bf \u098f\u09a1\u09bc\u09be\u09a8\u09cb\u09b0 \u0989\u09aa\u09be\u09af\u09bc<\/h2>\n<h3>\u09ad\u09c1\u09b2 1: \u09aa\u09cd\u09b0\u09a5\u09ae\u09c7 \u0995\u09be\u09b0\u09c7\u09a8\u09cd\u099f \u09a6\u09c7\u0996\u09be<\/h3>\n<p>\u098f\u099f\u09bf \u09b8\u09ac\u099a\u09c7\u09af\u09bc\u09c7 \u09b8\u09be\u09a7\u09be\u09b0\u09a3 \u09ac\u09be\u09a3\u09bf\u099c\u09cd\u09af\u09bf\u0995 \u09ad\u09c1\u09b2\u0964 \u098f\u0995\u099f\u09bf <code>\u09e9\u09e8 A<\/code> \u09a1\u09bf\u09ad\u09be\u0987\u09b8\u099f\u09bf \u0995\u09cb\u09a8\u0993 \u09aa\u09cd\u09b0\u0995\u09b2\u09cd\u09aa\u09c7\u09b0 \u099c\u09a8\u09cd\u09af \u0985\u09a8\u09c1\u09ae\u09cb\u09a6\u09bf\u09a4 \u09b9\u09af\u09bc \u098f\u09ae\u09a8\u0995\u09bf \u09ad\u09cb\u09b2\u09cd\u099f\u09c7\u099c \u0995\u09cd\u09b2\u09be\u09b8 \u09ac\u09be \u09b8\u09cd\u09af\u09c1\u0987\u099a\u09bf\u0982 \u09a1\u09bf\u0989\u099f\u09bf \u200b\u200b\u09aa\u09cd\u09b0\u0995\u09c3\u09a4 \u09b8\u09bf\u09b8\u09cd\u099f\u09c7\u09ae\u09c7\u09b0 \u09b8\u09be\u09a5\u09c7 \u09ae\u09c7\u09b2\u09c7 \u09a8\u09be\u0964.<\/p>\n<p><strong>\u098f\u099f\u09bf \u098f\u09a1\u09bc\u09be\u09a8\u09cb\u09b0 \u0989\u09aa\u09be\u09af\u09bc:<\/strong> \u09b8\u09b0\u09cd\u09ac\u09a6\u09be \u09ad\u09cb\u09b2\u09cd\u099f\u09c7\u099c \u09a6\u09bf\u09af\u09bc\u09c7 \u09b6\u09c1\u09b0\u09c1 \u0995\u09b0\u09c1\u09a8\u0964 \u0995\u09be\u09b0\u09c7\u09a8\u09cd\u099f \u0997\u09c1\u09b0\u09c1\u09a4\u09cd\u09ac\u09aa\u09c2\u09b0\u09cd\u09a3, \u09a4\u09ac\u09c7 \u09ad\u09cb\u09b2\u09cd\u099f\u09c7\u099c \u0989\u09aa\u09af\u09c1\u0995\u09cd\u09a4\u09a4\u09be \u09a8\u09bf\u09b6\u09cd\u099a\u09bf\u09a4 \u09b9\u0993\u09af\u09bc\u09be\u09b0 \u09aa\u09b0\u09c7\u0987 \u098f\u099f\u09bf \u0997\u09c1\u09b0\u09c1\u09a4\u09cd\u09ac\u09aa\u09c2\u09b0\u09cd\u09a3\u0964.<\/p>\n<h3>\u09ad\u09c1\u09b2 2: \u0987\u0989\u099f\u09bf\u09b2\u09be\u0987\u099c\u09c7\u09b6\u09a8 \u0995\u09cd\u09af\u09be\u099f\u09be\u0997\u09b0\u09bf \u0989\u09aa\u09c7\u0995\u09cd\u09b7\u09be \u0995\u09b0\u09be<\/h3>\n<p>\u09b8\u09a0\u09bf\u0995 \u0995\u09be\u09b0\u09c7\u09a8\u09cd\u099f \u098f\u09ac\u0982 \u09ad\u09cb\u09b2\u09cd\u099f\u09c7\u099c \u09b8\u09b9 \u098f\u0995\u099f\u09bf \u09b8\u09c1\u0987\u099a \u098f\u0996\u09a8\u0993 \u0985\u09a8\u09c1\u09aa\u09af\u09c1\u0995\u09cd\u09a4 \u09b9\u09a4\u09c7 \u09aa\u09be\u09b0\u09c7 \u09af\u09a6\u09bf \u0987\u0989\u099f\u09bf\u09b2\u09be\u0987\u099c\u09c7\u09b6\u09a8 \u0995\u09cd\u09af\u09be\u099f\u09be\u0997\u09b0\u09bf \u09aa\u09cd\u09b0\u0995\u09c3\u09a4 \u09a1\u09bf\u09b8\u09bf \u09a1\u09bf\u0989\u099f\u09bf\u09b0 \u09b8\u09be\u09a5\u09c7 \u09ae\u09c7\u09b2\u09c7 \u09a8\u09be\u0964.<\/p>\n<p><strong>\u098f\u099f\u09bf \u098f\u09a1\u09bc\u09be\u09a8\u09cb\u09b0 \u0989\u09aa\u09be\u09af\u09bc:<\/strong> \u0987\u0989\u099f\u09bf\u09b2\u09be\u0987\u099c\u09c7\u09b6\u09a8 \u0995\u09cd\u09af\u09be\u099f\u09be\u0997\u09b0\u09bf\u099f\u09bf\u0995\u09c7 \u098f\u0995\u099f\u09bf \u09ac\u09be\u09a7\u09cd\u09af\u09a4\u09be\u09ae\u09c2\u09b2\u0995 \u09a8\u09bf\u09b0\u09cd\u09ac\u09be\u099a\u09a8 \u09ae\u09be\u09a8\u09a6\u09a3\u09cd\u09a1 \u09b9\u09bf\u09b8\u09be\u09ac\u09c7 \u09ac\u09bf\u09ac\u09c7\u099a\u09a8\u09be \u0995\u09b0\u09c1\u09a8, \u0995\u09cb\u09a8\u0993 \u0990\u099a\u09cd\u099b\u09bf\u0995 \u09a1\u09c7\u099f\u09be \u09aa\u09af\u09bc\u09c7\u09a8\u09cd\u099f \u09a8\u09af\u09bc\u0964.<\/p>\n<h3>\u09ad\u09c1\u09b2 3: \u0986\u09b0\u0993 \u09aa\u09cb\u09b2 \u09b8\u09cd\u09ac\u09af\u09bc\u0982\u0995\u09cd\u09b0\u09bf\u09af\u09bc\u09ad\u09be\u09ac\u09c7 \u0986\u09b0\u0993 \u09ad\u09be\u09b2 \u09ae\u09be\u09a8\u09c7 \u09a7\u09b0\u09c7 \u09a8\u09c7\u0993\u09af\u09bc\u09be<\/h3>\n<p>\u0986\u09b0\u0993 \u09aa\u09cb\u09b2 \u09b8\u09cd\u09ac\u09af\u09bc\u0982\u0995\u09cd\u09b0\u09bf\u09af\u09bc\u09ad\u09be\u09ac\u09c7 \u09a8\u09bf\u09b0\u09be\u09aa\u09a6 \u09ac\u09be \u0986\u09b0\u0993 \u09b8\u0995\u09cd\u09b7\u09ae \u09b8\u09c1\u0987\u099a \u09ae\u09be\u09a8\u09c7 \u09a8\u09be\u0964 \u09a4\u09be\u09b0\u09be \u098f\u0995\u099f\u09bf \u09a8\u09bf\u09b0\u09cd\u09a6\u09bf\u09b7\u09cd\u099f \u0985\u09ad\u09cd\u09af\u09a8\u09cd\u09a4\u09b0\u09c0\u09a3 \u098f\u09ac\u0982 \u09ac\u09be\u09b9\u09cd\u09af\u09bf\u0995 \u0995\u09a8\u09cd\u09a1\u09be\u0995\u09cd\u099f\u09b0 \u09ac\u09be\u09a7\u09be \u09ac\u09cd\u09af\u09ac\u09b8\u09cd\u09a5\u09be \u09a8\u09bf\u09b0\u09cd\u09a6\u09c7\u09b6 \u0995\u09b0\u09c7\u0964.<\/p>\n<p><strong>\u098f\u099f\u09bf \u098f\u09a1\u09bc\u09be\u09a8\u09cb\u09b0 \u0989\u09aa\u09be\u09af\u09bc:<\/strong> \u09b8\u09b0\u09cd\u09ac\u09a6\u09be \u09aa\u09cd\u09b0\u09b8\u09cd\u09a4\u09c1\u09a4\u0995\u09be\u09b0\u0995\u09c7\u09b0 \u09b8\u0982\u09af\u09cb\u0997 \u09a1\u09be\u09af\u09bc\u09be\u0997\u09cd\u09b0\u09be\u09ae\u099f\u09bf \u09a6\u09c7\u0996\u09c1\u09a8 \u098f\u09ac\u0982 \u0986\u09aa\u09a8\u09be\u09b0 \u09a8\u09bf\u09b0\u09cd\u09a6\u09bf\u09b7\u09cd\u099f \u09b8\u09be\u09b0\u09cd\u0995\u09bf\u099f \u09ac\u09bf\u09a8\u09cd\u09af\u09be\u09b8\u09c7\u09b0 \u099c\u09a8\u09cd\u09af \u09aa\u09cb\u09b2\u0997\u09c1\u09b2\u09bf \u0995\u09c0\u09ad\u09be\u09ac\u09c7 \u09a4\u09be\u09b0\u09af\u09c1\u0995\u09cd\u09a4 \u0995\u09b0\u09be \u0989\u099a\u09bf\u09a4 \u09a4\u09be \u09a8\u09bf\u09b6\u09cd\u099a\u09bf\u09a4 \u0995\u09b0\u09c1\u09a8\u0964.<\/p>\n<h3>\u09ad\u09c1\u09b2 4: \u098f\u09b8\u09bf-\u09b2\u09c1\u0995\u09bf\u0982 \u099a\u09bf\u09b9\u09cd\u09a8\u09bf\u09a4\u0995\u09b0\u09a3\u0997\u09c1\u09b2\u09bf\u0995\u09c7 \u09a1\u09bf\u09b8\u09bf\u09b0 \u099c\u09a8\u09cd\u09af \u0997\u09cd\u09b0\u09b9\u09a3\u09af\u09cb\u0997\u09cd\u09af \u09b9\u09bf\u09b8\u09be\u09ac\u09c7 \u09ac\u09bf\u09ac\u09c7\u099a\u09a8\u09be \u0995\u09b0\u09be<\/h3>\n<p>\u0995\u09bf\u099b\u09c1 \u09aa\u09a3\u09cd\u09af \u098f\u09ae\u09a8 \u099a\u09bf\u09b9\u09cd\u09a8\u09bf\u09a4\u0995\u09b0\u09a3 \u09ac\u09b9\u09a8 \u0995\u09b0\u09c7 \u09af\u09be \u099c\u09c7\u09a8\u09c7\u09b0\u09bf\u0995 \u09ac\u09b2\u09c7 \u09ae\u09a8\u09c7 \u09b9\u09af\u09bc \u09ac\u09be \u09ae\u09c2\u09b2\u09a4 \u098f\u09b8\u09bf \u0985\u09cd\u09af\u09be\u09aa\u09cd\u09b2\u09bf\u0995\u09c7\u09b6\u09a8\u0997\u09c1\u09b2\u09bf\u09b0 \u09b8\u09be\u09a5\u09c7 \u09af\u09c1\u0995\u09cd\u09a4\u0964 \u09af\u09a6\u09bf \u09a1\u09bf\u09ad\u09be\u0987\u09b8\u099f\u09bf \u09b8\u09cd\u09aa\u09b7\u09cd\u099f\u09ad\u09be\u09ac\u09c7 \u09b0\u09c7\u099f \u0995\u09b0\u09be \u09a8\u09be \u09b9\u09af\u09bc \u098f\u09ac\u0982 \u09a1\u09bf\u09b8\u09bf \u09b8\u09cd\u09af\u09c1\u0987\u099a\u09bf\u0982 \u09a1\u09bf\u0989\u099f\u09bf\u09b0 \u099c\u09a8\u09cd\u09af \u099a\u09bf\u09b9\u09cd\u09a8\u09bf\u09a4 \u09a8\u09be \u0995\u09b0\u09be \u09b9\u09af\u09bc \u09a4\u09ac\u09c7 \u09b8\u09a4\u09b0\u09cd\u0995\u09a4\u09be \u0985\u09ac\u09b2\u09ae\u09cd\u09ac\u09a8 \u0995\u09b0\u09c1\u09a8\u0964.<\/p>\n<p><strong>\u098f\u099f\u09bf \u098f\u09a1\u09bc\u09be\u09a8\u09cb\u09b0 \u0989\u09aa\u09be\u09af\u09bc:<\/strong> \u09b8\u09cd\u09aa\u09b7\u09cd\u099f \u09a1\u09bf\u09b8\u09bf \u09ad\u09cb\u09b2\u09cd\u099f\u09c7\u099c \u099a\u09bf\u09b9\u09cd\u09a8\u09bf\u09a4\u0995\u09b0\u09a3, \u098f\u0995\u099f\u09bf \u09a1\u09bf\u09b8\u09bf \u0987\u0989\u099f\u09bf\u09b2\u09be\u0987\u099c\u09c7\u09b6\u09a8 \u0995\u09cd\u09af\u09be\u099f\u09be\u0997\u09b0\u09bf \u098f\u09ac\u0982 \u098f\u09b0 \u0989\u09b2\u09cd\u09b2\u09c7\u0996 \u09b8\u09a8\u09cd\u09a7\u09be\u09a8 \u0995\u09b0\u09c1\u09a8 <strong>\u0986\u0987\u0987\u09b8\u09bf 60947-3<\/strong> \u09ac\u09be \u0985\u09a8\u09cd\u09af \u0995\u09cb\u09a8\u0993 \u09aa\u09cd\u09b0\u09af\u09cb\u099c\u09cd\u09af \u09a1\u09bf\u09b8\u09bf-\u09aa\u09cd\u09b0\u09be\u09b8\u0999\u09cd\u0997\u09bf\u0995 \u09b8\u09cd\u099f\u09cd\u09af\u09be\u09a8\u09cd\u09a1\u09be\u09b0\u09cd\u09a1 \u09ad\u09bf\u09a4\u09cd\u09a4\u09bf\u0964.<\/p>\n<h2>\u09aa\u09cd\u09b0\u09be\u09af\u09bc\u09b6\u0987 \u099c\u09bf\u099c\u09cd\u099e\u09be\u09b8\u09bf\u09a4 \u09aa\u09cd\u09b0\u09b6\u09cd\u09a8\u09be\u09ac\u09b2\u09c0<\/h2>\n<h3>What is the first rating I should check on a DC isolator switch?<\/h3>\n<p>Start with the voltage rating, because a switch that is under-rated for DC voltage is immediately disqualified regardless of its current rating. In PV applications, check against the cold-corrected maximum Voc, not just the nominal system voltage.<\/p>\n<h3>What does 4P mean on a DC isolator switch?<\/h3>\n<p>It means the switch uses four poles to disconnect the circuit. In DC applications, this often affects how the conductors are routed and what voltage arrangement the switch can support.<\/p>\n<h3>What does DC-21B mean?<\/h3>\n<p>It is an IEC utilization category indicating the switching duty for which the device was tested. DC-21B corresponds to resistive or slightly inductive DC loads.<\/p>\n<h3>What do DC-PV1 and DC-PV2 mean on a solar isolator switch?<\/h3>\n<p>They are photovoltaic-specific utilization categories used in the IEC 60947-3 framework. DC-PV1 covers standard PV switching duty, while DC-PV2 covers more demanding PV conditions, including reverse-current scenarios.<\/p>\n<h3>Is current rating more important than utilization category?<\/h3>\n<p>No. Current rating tells you how much load the switch can carry. Utilization category tells you what kind of load and switching conditions the switch was designed to handle.<\/p>\n<h3>Can I choose a DC isolator by amperes only?<\/h3>\n<p>No. A correct selection also depends on maximum DC voltage, pole configuration, utilization category, and the specific application conditions.<\/p>\n<h2>\u098f\u09b0 \u09aa\u09b0\u09c7 \u0995\u09c0 \u0995\u09b0\u09a4\u09c7 \u09b9\u09ac\u09c7<\/h2>\n<p>\u098f\u0996\u09a8 \u0986\u09aa\u09a8\u09bf \u0995\u09c0\u09ad\u09be\u09ac\u09c7 \u09b0\u09c7\u099f\u09bf\u0982\u0997\u09c1\u09b2\u09bf \u09aa\u09a1\u09bc\u09a4\u09c7 \u09b9\u09af\u09bc \u09a4\u09be \u09ac\u09c1\u099d\u09a4\u09c7 \u09aa\u09c7\u09b0\u09c7\u099b\u09c7\u09a8, \u09aa\u09b0\u09ac\u09b0\u09cd\u09a4\u09c0 \u09aa\u09a6\u0995\u09cd\u09b7\u09c7\u09aa\u099f\u09bf \u09b9\u09b2 \u09b8\u09c7\u0997\u09c1\u09b2\u09bf \u0986\u09aa\u09a8\u09be\u09b0 \u0986\u09b8\u09b2 \u09aa\u09cd\u09b0\u0995\u09b2\u09cd\u09aa\u09c7 \u09aa\u09cd\u09b0\u09af\u09bc\u09cb\u0997 \u0995\u09b0\u09be\u0964.<\/p>\n<ul>\n<li>\u0986\u09aa\u09a8\u09bf \u09af\u09a6\u09bf \u0995\u09cb\u09a8\u0993 \u09a8\u09bf\u09b0\u09cd\u09a6\u09bf\u09b7\u09cd\u099f \u09aa\u09cd\u09b0\u0995\u09b2\u09cd\u09aa\u09c7\u09b0 \u099c\u09a8\u09cd\u09af \u0995\u09cb\u09a8\u0993 \u0986\u0987\u09b8\u09cb\u09b2\u09c7\u099f\u09b0 \u09a8\u09bf\u09b0\u09cd\u09ac\u09be\u099a\u09a8 \u0995\u09b0\u099b\u09c7\u09a8 \u09a4\u09ac\u09c7 \u0986\u09aa\u09a8\u09be\u09b0 \u0986\u09b8\u09b2 \u09b8\u09bf\u09b8\u09cd\u099f\u09c7\u09ae \u09aa\u09cd\u09af\u09be\u09b0\u09be\u09ae\u09bf\u099f\u09be\u09b0\u09c7\u09b0 \u09ac\u09bf\u09aa\u09b0\u09c0\u09a4\u09c7 \u09aa\u09cd\u09b0\u09a4\u09bf\u099f\u09bf \u09aa\u09cd\u09b0\u09be\u09b0\u09cd\u09a5\u09c0\u0995\u09c7 \u09af\u09be\u099a\u09be\u0987 \u0995\u09b0\u09a4\u09c7 \u0989\u09aa\u09b0\u09c7\u09b0 \u099b\u09af\u09bc-\u09a7\u09be\u09aa\u09c7\u09b0 \u09b8\u09bf\u09a6\u09cd\u09a7\u09be\u09a8\u09cd\u09a4 \u09aa\u09cd\u09b0\u09ac\u09be\u09b9 \u09ac\u09cd\u09af\u09ac\u09b9\u09be\u09b0 \u0995\u09b0\u09c1\u09a8\u0964.<\/li>\n<li>\u0986\u09aa\u09a8\u09be\u09b0 \u09af\u09a6\u09bf \u0993\u09af\u09bc\u09cd\u09af\u09be\u09b0\u09bf\u0982\u09af\u09bc\u09c7\u09b0 \u09a6\u09bf\u0995\u09c7 \u09b8\u09b9\u09be\u09af\u09bc\u09a4\u09be\u09b0 \u09aa\u09cd\u09b0\u09af\u09bc\u09cb\u099c\u09a8 \u09b9\u09af\u09bc \u09a4\u09ac\u09c7 \u099a\u09be\u09b2\u09bf\u09af\u09bc\u09c7 \u09af\u09be\u09a8 <a href=\"https:\/\/test.viox.com\/bn\/connection-of-dc-isolators\/\">\u09a1\u09bf\u09b8\u09bf \u0986\u0987\u09b8\u09cb\u09b2\u09c7\u099f\u09b0\u09c7\u09b0 \u09b8\u0982\u09af\u09cb\u0997<\/a> \u09aa\u09cb\u09b2-\u09ac\u09be\u0987-\u09aa\u09cb\u09b2 \u0993\u09af\u09bc\u09cd\u09af\u09be\u09b0\u09bf\u0982 \u0997\u09be\u0987\u09a1\u09c7\u09b0 \u099c\u09a8\u09cd\u09af\u0964.<\/li>\n<li>If you want to review VIOX DC isolator specifications, visit the <a href=\"https:\/\/test.viox.com\/bn\/dc-isolator-switch\/\">DC Isolator Switch product page<\/a> to compare voltage, current, pole, and utilization category data.<\/li>\n<li>If you need the broader fundamentals, go back to <a href=\"https:\/\/test.viox.com\/bn\/what-is-a-dc-isolator-switch\/\">\u09a1\u09bf\u09b8\u09bf \u0986\u0987\u09b8\u09cb\u09b2\u09c7\u099f\u09b0 \u09b8\u09c1\u0987\u099a \u0995\u09c0?<\/a>.<\/li>\n<\/ul>\n<h2>Sources Used<\/h2>\n<ul>\n<li><a href=\"https:\/\/webstore.iec.ch\/en\/publication\/59785\" rel=\"nofollow noopener\" target=\"_blank\">IEC 60947-3:2020 overview<\/a><\/li>\n<li><a href=\"https:\/\/www.shopulstandards.com\/ProductDetail.aspx?UniqueKey=30658\" rel=\"nofollow noopener\" target=\"_blank\">UL 98B standard family reference<\/a><\/li>\n<li><a href=\"https:\/\/electrification.us.abb.com\/products\/switches-disconnects\/otdc-disconnects\" rel=\"nofollow noopener\" target=\"_blank\">ABB OTDC disconnects reference showing DC-PV2 ratings<\/a><\/li>\n<li><a href=\"https:\/\/www.socomec.be\/fr\/securiser-le-sectionnement-des-panneaux-photovoltaiques\" rel=\"nofollow noopener\" target=\"_blank\">Socomec photovoltaic disconnector guidance discussing DC-PV2<\/a><\/li>\n<\/ul>\n<\/div>\n<div class=\"simg-pop-btn\" style=\"top: 235.828px; left: 14px; display: none;\"><\/div>\n<div class=\"simg-pop-btn\" style=\"top: 235.828px; left: 14px; display: none;\"><\/div>","protected":false},"excerpt":{"rendered":"<p>Direct Answer Reading a DC isolator switch label correctly comes down to four things, checked in this order: Voltage rating \u2014 can the switch safely handle the highest DC voltage in your system? Current rating \u2014 can it carry the expected continuous current without overheating? Pole configuration \u2014 how many conductors does it disconnect at [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":23389,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-23388","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/test.viox.com\/bn\/wp-json\/wp\/v2\/posts\/23388","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/test.viox.com\/bn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/test.viox.com\/bn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/test.viox.com\/bn\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/test.viox.com\/bn\/wp-json\/wp\/v2\/comments?post=23388"}],"version-history":[{"count":1,"href":"https:\/\/test.viox.com\/bn\/wp-json\/wp\/v2\/posts\/23388\/revisions"}],"predecessor-version":[{"id":23390,"href":"https:\/\/test.viox.com\/bn\/wp-json\/wp\/v2\/posts\/23388\/revisions\/23390"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/test.viox.com\/bn\/wp-json\/wp\/v2\/media\/23389"}],"wp:attachment":[{"href":"https:\/\/test.viox.com\/bn\/wp-json\/wp\/v2\/media?parent=23388"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/test.viox.com\/bn\/wp-json\/wp\/v2\/categories?post=23388"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/test.viox.com\/bn\/wp-json\/wp\/v2\/tags?post=23388"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}