{"id":21369,"date":"2026-01-20T14:42:08","date_gmt":"2026-01-20T06:42:08","guid":{"rendered":"https:\/\/viox.com\/?p=21369"},"modified":"2026-01-20T14:44:28","modified_gmt":"2026-01-20T06:44:28","slug":"mcb-mccb-temperature-rise-limits-iec-ul-standards","status":"publish","type":"post","link":"https:\/\/test.viox.com\/bn\/mcb-mccb-temperature-rise-limits-iec-ul-standards\/","title":{"rendered":"MCB MCCB Temperature Rise Limits: How Hot is Too Hot per IEC 60947 &amp; UL 489?"},"content":{"rendered":"<div class=\"product-intro\">\n<h2>\u09b8\u09be\u09b0\u09cd\u0995\u09bf\u099f \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0\u09c7 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09ac\u09c3\u09a6\u09cd\u09a7\u09bf \u09ac\u09cb\u099d\u09be: \u0995\u09c7\u09a8 \u098f\u099f\u09bf \u0997\u09c1\u09b0\u09c1\u09a4\u09cd\u09ac\u09aa\u09c2\u09b0\u09cd\u09a3<\/h2>\n<p>\u09aa\u09cd\u09b0\u09a4\u09bf\u099f\u09bf \u09b8\u09be\u09b0\u09cd\u0995\u09bf\u099f \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0 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\u09aa\u09b0\u09bf\u099a\u09be\u09b2\u09bf\u09a4 \u0995\u09b0\u09a4\u09c7 \u09aa\u09be\u09b0\u09c7\u0964.<\/p>\n<p>\u09ac\u09c8\u09a6\u09cd\u09af\u09c1\u09a4\u09bf\u0995 \u09aa\u09cd\u09b0\u0995\u09cc\u09b6\u09b2\u09c0 \u098f\u09ac\u0982 \u09aa\u09cd\u09af\u09be\u09a8\u09c7\u09b2 \u09a8\u09bf\u09b0\u09cd\u09ae\u09be\u09a4\u09be\u09a6\u09c7\u09b0 \u099c\u09a8\u09cd\u09af \u09b8\u09cd\u09aa\u09c7\u09b8\u09bf\u09ab\u09be\u0987 \u0995\u09b0\u09be <a href=\"https:\/\/test.viox.com\/bn\/mcb\/\">\u098f\u09ae\u09b8\u09bf\u09ac\u09bf<\/a> \u098f\u09ac\u0982 <a href=\"https:\/\/test.viox.com\/bn\/mccb\/\">\u098f\u09ae\u09b8\u09bf\u09b8\u09bf\u09ac\u09bf<\/a>, \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09ac\u09c3\u09a6\u09cd\u09a7\u09bf\u09b0 \u09b8\u09c0\u09ae\u09be \u09ac\u09cb\u099d\u09be \u09b6\u09c1\u09a7\u09c1\u09ae\u09be\u09a4\u09cd\u09b0 \u09b8\u09ae\u09cd\u09ae\u09a4\u09bf\u09b0 \u09ac\u09bf\u09b7\u09af\u09bc \u09a8\u09af\u09bc\u2014\u098f\u099f\u09bf \u09a6\u09c0\u09b0\u09cd\u0998\u09ae\u09c7\u09af\u09bc\u09be\u09a6\u09c0 \u09a8\u09bf\u09b0\u09cd\u09ad\u09b0\u09af\u09cb\u0997\u09cd\u09af\u09a4\u09be \u098f\u09ac\u0982 \u09a8\u09bf\u09b0\u09be\u09aa\u09a4\u09cd\u09a4\u09be \u09a8\u09bf\u09b6\u09cd\u099a\u09bf\u09a4 \u0995\u09b0\u09be\u09b0 \u09ac\u09bf\u09b7\u09af\u09bc\u0964 IEC 60947-2 (MCCB-\u098f\u09b0 \u099c\u09a8\u09cd\u09af) \u098f\u09ac\u0982 UL 489 (\u0989\u09a4\u09cd\u09a4\u09b0 \u0986\u09ae\u09c7\u09b0\u09bf\u0995\u09be\u09b0 \u09b8\u09cd\u099f\u09cd\u09af\u09be\u09a8\u09cd\u09a1\u09be\u09b0\u09cd\u09a1) \u0989\u09ad\u09af\u09bc\u0987 \u09b8\u09c1\u09a8\u09bf\u09b0\u09cd\u09a6\u09bf\u09b7\u09cd\u099f \u09a4\u09be\u09aa\u09c0\u09af\u09bc \u0995\u09b0\u09cd\u09ae\u0995\u09cd\u09b7\u09ae\u09a4\u09be \u09aa\u09cd\u09b0\u09af\u09bc\u09cb\u099c\u09a8\u09c0\u09af\u09bc\u09a4\u09be \u09aa\u09cd\u09b0\u09a4\u09bf\u09b7\u09cd\u09a0\u09be \u0995\u09b0\u09c7 \u09af\u09be VIOX-\u098f\u09b0 \u09ae\u09a4\u09cb \u09a8\u09bf\u09b0\u09cd\u09ae\u09be\u09a4\u09be\u09a6\u09c7\u09b0 \u0995\u09a0\u09cb\u09b0 \u099f\u09be\u0987\u09aa \u099f\u09c7\u09b8\u09cd\u099f\u09bf\u0982\u09af\u09bc\u09c7\u09b0 \u09ae\u09be\u09a7\u09cd\u09af\u09ae\u09c7 \u09aa\u09c2\u09b0\u09a3 \u0995\u09b0\u09a4\u09c7 \u09b9\u09df\u0964.<\/p>\n<figure style=\"text-align: center; margin: 20px 0;\">\n        <img decoding=\"async\" src=\"https:\/\/img.viox.com\/Industrial-photography-with-FLIR-camera-showing-temperature-gradients-on-VIOX-breakers.webp\" alt=\"Thermal imaging inspection of VIOX circuit breakers showing temperature distribution in electrical panel\" style=\"max-width: 100%; height: auto;\"><figcaption style=\"font-style: italic; margin-top: 8px;\">\u099a\u09bf\u09a4\u09cd\u09b0 1: \u098f\u0995\u099f\u09bf \u0985\u09aa\u09be\u09b0\u09c7\u09b6\u09a8\u09be\u09b2 \u09ac\u09c8\u09a6\u09cd\u09af\u09c1\u09a4\u09bf\u0995 \u09aa\u09cd\u09af\u09be\u09a8\u09c7\u09b2\u09c7 VIOX \u09b8\u09be\u09b0\u09cd\u0995\u09bf\u099f 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\u09ac\u09cb\u099d\u09be \u0985\u09aa\u09b0\u09bf\u09b9\u09be\u09b0\u09cd\u09af <strong>\u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09ac\u09c3\u09a6\u09cd\u09a7\u09bf (\u0394T)<\/strong> \u098f\u09ac\u0982 <strong>\u09aa\u09b0\u09ae \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be<\/strong>:<\/p>\n<ul>\n<li><strong>\u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09ac\u09c3\u09a6\u09cd\u09a7\u09bf (\u0394T)<\/strong>: \u09aa\u09b0\u09bf\u09ac\u09c7\u09b7\u09cd\u099f\u09bf\u09a4 \u0985\u09ac\u09b8\u09cd\u09a5\u09be\u09b0 \u0989\u09aa\u09b0\u09c7 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be\u09b0 \u09ac\u09c3\u09a6\u09cd\u09a7\u09bf, \u09af\u09be \u09a1\u09bf\u0997\u09cd\u09b0\u09bf \u09b8\u09c7\u09b2\u09b8\u09bf\u09af\u09bc\u09be\u09b8 \u09ac\u09be \u09ab\u09be\u09b0\u09c7\u09a8\u09b9\u09be\u0987\u099f\u09c7 \u09aa\u09b0\u09bf\u09ae\u09be\u09aa \u0995\u09b0\u09be \u09b9\u09af\u09bc<\/li>\n<li><strong>\u09aa\u09b0\u09ae \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be<\/strong>: \u098f\u0995\u099f\u09bf \u0989\u09aa\u09be\u09a6\u09be\u09a8\u09c7\u09b0 \u09aa\u09cd\u09b0\u0995\u09c3\u09a4 \u09aa\u09b0\u09bf\u09ae\u09be\u09aa\u0995\u09c3\u09a4 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be, \u09aa\u09b0\u09bf\u09ac\u09c7\u09b7\u09cd\u099f\u09bf\u09a4 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u098f\u09ac\u0982 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09ac\u09c3\u09a6\u09cd\u09a7\u09bf \u0989\u09ad\u09af\u09bc \u09ae\u09bf\u09b2\u09bf\u09df\u09c7<\/li>\n<\/ul>\n<p>\u09ac\u09c7\u09b6\u09bf\u09b0\u09ad\u09be\u0997 \u09b8\u09cd\u099f\u09cd\u09af\u09be\u09a8\u09cd\u09a1\u09be\u09b0\u09cd\u09a1 40\u00b0C (104\u00b0F) \u098f\u09b0 \u098f\u0995\u099f\u09bf \u09b8\u09cd\u099f\u09cd\u09af\u09be\u09a8\u09cd\u09a1\u09be\u09b0\u09cd\u09a1 \u0995\u09cd\u09af\u09be\u09b2\u09bf\u09ac\u09cd\u09b0\u09c7\u09b6\u09a8 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09a7\u09b0\u09c7 \u09a8\u09bf\u09af\u09bc\u09c7 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09ac\u09c3\u09a6\u09cd\u09a7\u09bf\u09b0 \u09b8\u09c0\u09ae\u09be \u09a8\u09bf\u09b0\u09cd\u09a6\u09bf\u09b7\u09cd\u099f \u0995\u09b0\u09c7\u0964 \u098f\u09b0 \u09ae\u09be\u09a8\u09c7 \u09b9\u09b2:<\/p>\n<p><strong>\u09aa\u09b0\u09ae \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be = \u09aa\u09b0\u09bf\u09ac\u09c7\u09b7\u09cd\u099f\u09bf\u09a4 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be + \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09ac\u09c3\u09a6\u09cd\u09a7\u09bf<\/strong><\/p>\n<p>\u0989\u09a6\u09be\u09b9\u09b0\u09a3\u09b8\u09cd\u09ac\u09b0\u09c2\u09aa, 50\u00b0C \u09ac\u09c3\u09a6\u09cd\u09a7\u09bf \u09b8\u09c0\u09ae\u09be \u09b8\u09b9 \u098f\u0995\u099f\u09bf \u099f\u09be\u09b0\u09cd\u09ae\u09bf\u09a8\u09be\u09b2 40\u00b0C \u09aa\u09b0\u09bf\u09ac\u09c7\u09b7\u09cd\u099f\u09bf\u09a4 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be\u09af\u09bc \u0995\u09be\u099c \u0995\u09b0\u09b2\u09c7 90\u00b0C \u098f\u09b0 \u09aa\u09b0\u09ae \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be\u09af\u09bc \u09aa\u09cc\u0981\u099b\u09be\u09ac\u09c7\u2014\u09af\u09be \u0985\u09a8\u09c7\u0995 \u0995\u09a8\u09cd\u09a1\u09be\u0995\u09cd\u099f\u09b0 \u0987\u09a8\u09b8\u09c1\u09b2\u09c7\u09b6\u09a8 \u09aa\u09cd\u09b0\u0995\u09be\u09b0\u09c7\u09b0 \u099c\u09a8\u09cd\u09af \u09b8\u09b0\u09cd\u09ac\u09be\u09a7\u09bf\u0995 \u09a8\u09bf\u09b0\u09be\u09aa\u09a6 \u0985\u09aa\u09be\u09b0\u09c7\u099f\u09bf\u0982 \u09aa\u09af\u09bc\u09c7\u09a8\u09cd\u099f\u0964.<\/p>\n<h2>UL 489 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09ac\u09c3\u09a6\u09cd\u09a7\u09bf \u09aa\u09cd\u09b0\u09af\u09bc\u09cb\u099c\u09a8\u09c0\u09af\u09bc\u09a4\u09be<\/h2>\n<p>UL 489 \u0989\u09a4\u09cd\u09a4\u09b0 \u0986\u09ae\u09c7\u09b0\u09bf\u0995\u09be\u09b0 \u0987\u09a8\u09b8\u09cd\u099f\u09b2\u09c7\u09b6\u09a8\u09c7 \u09ac\u09cd\u09af\u09ac\u09b9\u09c3\u09a4 \u09ae\u09cb\u09b2\u09cd\u09a1\u09c7\u09a1 \u0995\u09c7\u09b8 \u09b8\u09be\u09b0\u09cd\u0995\u09bf\u099f \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0\u09c7\u09b0 \u099c\u09a8\u09cd\u09af \u09ac\u09cd\u09af\u09be\u09aa\u0995 \u09a4\u09be\u09aa\u09c0\u09af\u09bc \u09aa\u09b0\u09c0\u0995\u09cd\u09b7\u09be\u09b0 \u09aa\u09cd\u09b0\u09af\u09bc\u09cb\u099c\u09a8\u09c0\u09af\u09bc\u09a4\u09be \u09aa\u09cd\u09b0\u09a4\u09bf\u09b7\u09cd\u09a0\u09be \u0995\u09b0\u09c7\u0964 \u09b8\u09cd\u099f\u09cd\u09af\u09be\u09a8\u09cd\u09a1\u09be\u09b0\u09cd\u09a1\u099f\u09bf \u09b8\u09cd\u099f\u09cd\u09af\u09be\u09a8\u09cd\u09a1\u09be\u09b0\u09cd\u09a1-\u09b0\u09c7\u099f\u09c7\u09a1 (80% \u098f\u0995\u099f\u09be\u09a8\u09be) \u098f\u09ac\u0982 100%-\u09b0\u09c7\u099f\u09c7\u09a1 \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0\u09c7\u09b0 \u09ae\u09a7\u09cd\u09af\u09c7 \u09aa\u09be\u09b0\u09cd\u09a5\u0995\u09cd\u09af \u0995\u09b0\u09c7\u0964.<\/p>\n<h3>\u099f\u09c7\u09ac\u09bf\u09b2 1: UL 489 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09ac\u09c3\u09a6\u09cd\u09a7\u09bf \u09b8\u09c0\u09ae\u09be\u09b0 \u09b8\u09be\u09b0\u09b8\u0982\u0995\u09cd\u09b7\u09c7\u09aa<\/h3>\n<table border=\"1\" style=\"width: 100%; border-collapse: collapse; margin-bottom: 20px;\">\n<thead>\n<tr style=\"background-color: #f2f2f2;\">\n<th style=\"padding: 8px; text-align: left;\">\u0989\u09aa\u09be\u09a6\u09be\u09a8\/\u0985\u09ac\u09b8\u09cd\u09a5\u09be\u09a8<\/th>\n<th style=\"padding: 8px; text-align: left;\">\u09b8\u09cd\u099f\u09cd\u09af\u09be\u09a8\u09cd\u09a1\u09be\u09b0\u09cd\u09a1 \u09b0\u09c7\u099f\u09c7\u09a1 \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0 (80%)<\/th>\n<th style=\"padding: 8px; text-align: left;\">100% \u09b0\u09c7\u099f\u09c7\u09a1 \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0<\/th>\n<th style=\"padding: 8px; text-align: left;\">\u09b0\u09c7\u09ab\u09be\u09b0\u09c7\u09a8\u09cd\u09b8 \u0995\u09cd\u09b2\u099c<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding: 8px;\"><strong>\u0993\u09df\u09cd\u09af\u09be\u09b0\u09bf\u0982 \u099f\u09be\u09b0\u09cd\u09ae\u09bf\u09a8\u09be\u09b2<\/strong><\/td>\n<td style=\"padding: 8px;\">50\u00b0C \u09ac\u09c3\u09a6\u09cd\u09a7\u09bf (40\u00b0C \u09aa\u09b0\u09bf\u09ac\u09c7\u09b7\u09cd\u099f\u09bf\u09a4 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be\u09af\u09bc 90\u00b0C \u09aa\u09b0\u09ae)<\/td>\n<td style=\"padding: 8px;\">60\u00b0C \u09ac\u09c3\u09a6\u09cd\u09a7\u09bf (40\u00b0C \u09aa\u09b0\u09bf\u09ac\u09c7\u09b7\u09cd\u099f\u09bf\u09a4 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be\u09af\u09bc 100\u00b0C \u09aa\u09b0\u09ae)<\/td>\n<td style=\"padding: 8px;\">UL 489 \u00a77.1.4.2.2 \/ \u00a77.1.4.3.3<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>\u09a7\u09be\u09a4\u09ac \u09b9\u09be\u09a4\u09b2\/\u09a8\u09ac\u09b8<\/strong><\/td>\n<td style=\"padding: 8px;\">60\u00b0C \u09b8\u09b0\u09cd\u09ac\u09cb\u099a\u09cd\u099a \u09aa\u09b0\u09ae<\/td>\n<td style=\"padding: 8px;\">60\u00b0C \u09b8\u09b0\u09cd\u09ac\u09cb\u099a\u09cd\u099a \u09aa\u09b0\u09ae<\/td>\n<td style=\"padding: 8px;\">UL 489 \u00a77.1.4.1.6<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>\u0985\u09a7\u09be\u09a4\u09ac \u09b9\u09be\u09a4\u09b2\/\u09a8\u09ac\u09b8<\/strong><\/td>\n<td style=\"padding: 8px;\">85\u00b0C \u09b8\u09b0\u09cd\u09ac\u09cb\u099a\u09cd\u099a \u09aa\u09b0\u09ae<\/td>\n<td style=\"padding: 8px;\">85\u00b0C \u09b8\u09b0\u09cd\u09ac\u09cb\u099a\u09cd\u099a \u09aa\u09b0\u09ae<\/td>\n<td style=\"padding: 8px;\">UL 489 \u00a77.1.4.1.6<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>\u0985\u09ad\u09cd\u09af\u09a8\u09cd\u09a4\u09b0\u09c0\u09a3 \u0995\u09a8\u09cd\u099f\u09be\u0995\u09cd\u099f<\/strong><\/td>\n<td style=\"padding: 8px;\">\u0995\u09cb\u09a8\u09cb \u09a8\u09bf\u09b0\u09cd\u09a6\u09bf\u09b7\u09cd\u099f \u09b8\u09c0\u09ae\u09be \u09a8\u09c7\u0987 (\u09b8\u09b9\u09a8\u09b6\u09c0\u09b2\u09a4\u09be\u09b0 \u099c\u09a8\u09cd\u09af \u09aa\u09b0\u09c0\u0995\u09cd\u09b7\u09bf\u09a4)<\/td>\n<td style=\"padding: 8px;\">\u0995\u09cb\u09a8\u09cb \u09a8\u09bf\u09b0\u09cd\u09a6\u09bf\u09b7\u09cd\u099f \u09b8\u09c0\u09ae\u09be \u09a8\u09c7\u0987 (\u09b8\u09b9\u09a8\u09b6\u09c0\u09b2\u09a4\u09be\u09b0 \u099c\u09a8\u09cd\u09af \u09aa\u09b0\u09c0\u0995\u09cd\u09b7\u09bf\u09a4)<\/td>\n<td style=\"padding: 8px;\">UL 489 \u00a78.7<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>\u0998\u09c7\u09b0\u09c7\u09b0 \u0989\u09aa\u09b0\u09bf\u09ad\u09be\u0997<\/strong><\/td>\n<td style=\"padding: 8px;\">\u0989\u09aa\u09be\u09a6\u09be\u09a8 \u098f\u09ac\u0982 \u0985\u09ac\u09b8\u09cd\u09a5\u09be\u09a8 \u0985\u09a8\u09c1\u09b8\u09be\u09b0\u09c7 \u09aa\u09b0\u09bf\u09ac\u09b0\u09cd\u09a4\u09bf\u09a4 \u09b9\u09af\u09bc<\/td>\n<td style=\"padding: 8px;\">\u0989\u09aa\u09be\u09a6\u09be\u09a8 \u098f\u09ac\u0982 \u0985\u09ac\u09b8\u09cd\u09a5\u09be\u09a8 \u0985\u09a8\u09c1\u09b8\u09be\u09b0\u09c7 \u09aa\u09b0\u09bf\u09ac\u09b0\u09cd\u09a4\u09bf\u09a4 \u09b9\u09af\u09bc<\/td>\n<td style=\"padding: 8px;\">UL 489 \u00a77.1.4<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>\u09ae\u09c2\u09b2 \u0985\u09a8\u09cd\u09a4\u09b0\u09cd\u09a6\u09c3\u09b7\u09cd\u099f\u09bf<\/strong>: \u09b8\u09cd\u099f\u09cd\u09af\u09be\u09a8\u09cd\u09a1\u09be\u09b0\u09cd\u09a1 \u098f\u09ac\u0982 100% \u09b0\u09c7\u099f\u09c7\u09a1 \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0\u09c7\u09b0 \u09ae\u09a7\u09cd\u09af\u09c7 \u099f\u09be\u09b0\u09cd\u09ae\u09bf\u09a8\u09be\u09b2 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09ac\u09c3\u09a6\u09cd\u09a7\u09bf\u09b0 10\u00b0C \u09aa\u09be\u09b0\u09cd\u09a5\u0995\u09cd\u09af (50\u00b0C \u09ac\u09a8\u09be\u09ae 60\u00b0C) \u09b8\u09ae\u09cd\u09aa\u09c2\u09b0\u09cd\u09a3 \u09b0\u09c7\u099f\u09c7\u09a1 \u0995\u09be\u09b0\u09c7\u09a8\u09cd\u099f\u09c7 \u098f\u0995\u099f\u09be\u09a8\u09be \u0995\u09be\u099c \u0995\u09b0\u09be\u09b0 \u09b8\u09ae\u09af\u09bc \u0985\u09a4\u09bf\u09b0\u09bf\u0995\u09cd\u09a4 \u09a4\u09be\u09aa\u09c0\u09af\u09bc \u099a\u09be\u09aa\u0995\u09c7 \u09aa\u09cd\u09b0\u09a4\u09bf\u09ab\u09b2\u09bf\u09a4 \u0995\u09b0\u09c7\u0964 \u098f\u0987 \u0995\u09be\u09b0\u09a3\u09c7 <a href=\"https:\/\/test.viox.com\/bn\/standard-breaker-sizes\/\">100% \u09b0\u09c7\u099f\u09c7\u09a1 \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0<\/a> \u0989\u09a8\u09cd\u09a8\u09a4 \u099f\u09be\u09b0\u09cd\u09ae\u09bf\u09a8\u09be\u09b2 \u09a1\u09bf\u099c\u09be\u0987\u09a8 \u098f\u09ac\u0982 \u09a4\u09be\u09aa \u0985\u09aa\u099a\u09af\u09bc \u09aa\u09cd\u09b0\u09af\u09bc\u09cb\u099c\u09a8\u0964.<\/p>\n<figure style=\"text-align: center; margin: 20px 0;\">\n        <img decoding=\"async\" src=\"https:\/\/img.viox.com\/VIOX-MCCB-cutaway-with-heat-signature-overlay.webp\" alt=\"VIOX MCCB internal heat distribution showing critical temperature measurement points per UL 489\" style=\"max-width: 100%; height: auto;\"><figcaption style=\"font-style: italic; margin-top: 8px;\">\u099a\u09bf\u09a4\u09cd\u09b0 2: UL 489 \u09b8\u09cd\u099f\u09cd\u09af\u09be\u09a8\u09cd\u09a1\u09be\u09b0\u09cd\u09a1 \u0985\u09a8\u09c1\u09af\u09be\u09af\u09bc\u09c0 \u0985\u09ad\u09cd\u09af\u09a8\u09cd\u09a4\u09b0\u09c0\u09a3 \u09a4\u09be\u09aa \u09ac\u09bf\u09a4\u09b0\u09a3 \u098f\u09ac\u0982 \u0997\u09c1\u09b0\u09c1\u09a4\u09cd\u09ac\u09aa\u09c2\u09b0\u09cd\u09a3 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09aa\u09b0\u09bf\u09ae\u09be\u09aa\u09c7\u09b0 \u09aa\u09af\u09bc\u09c7\u09a8\u09cd\u099f\u0997\u09c1\u09b2\u09bf \u09a6\u09c7\u0996\u09bf\u09af\u09bc\u09c7 VIOX MCCB-\u098f\u09b0 \u0995\u09be\u099f\u0985\u09af\u09bc\u09c7 \u09ad\u09bf\u0989\u0964.<\/figcaption><\/figure>\n<h2>IEC 60947-2 \u098f\u09ac\u0982 IEC 60898-1 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be\u09b0 \u09aa\u09cd\u09b0\u09af\u09bc\u09cb\u099c\u09a8\u09c0\u09af\u09bc\u09a4\u09be<\/h2>\n<p>\u0986\u09a8\u09cd\u09a4\u09b0\u09cd\u099c\u09be\u09a4\u09bf\u0995 \u09b8\u09cd\u099f\u09cd\u09af\u09be\u09a8\u09cd\u09a1\u09be\u09b0\u09cd\u09a1\u0997\u09c1\u09b2\u09bf \u09a4\u09be\u09aa\u09c0\u09af\u09bc \u0995\u09b0\u09cd\u09ae\u0995\u09cd\u09b7\u09ae\u09a4\u09be\u09b0 \u099c\u09a8\u09cd\u09af \u098f\u0995\u099f\u09bf \u0985\u09a8\u09c1\u09b0\u09c2\u09aa \u0995\u09bf\u09a8\u09cd\u09a4\u09c1 \u09b8\u09be\u09ae\u09be\u09a8\u09cd\u09af \u09ad\u09bf\u09a8\u09cd\u09a8 \u09aa\u09a6\u09cd\u09a7\u09a4\u09bf \u0997\u09cd\u09b0\u09b9\u09a3 \u0995\u09b0\u09c7:<\/p>\n<h3>\u099f\u09c7\u09ac\u09bf\u09b2 2: IEC 60947-2 \u09ac\u09a8\u09be\u09ae IEC 60898-1 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be\u09b0 \u09aa\u09cd\u09b0\u09af\u09bc\u09cb\u099c\u09a8\u09c0\u09af\u09bc\u09a4\u09be\u09b0 \u09a4\u09c1\u09b2\u09a8\u09be<\/h3>\n<table border=\"1\" style=\"width: 100%; border-collapse: collapse; margin-bottom: 20px;\">\n<thead>\n<tr style=\"background-color: #f2f2f2;\">\n<th style=\"padding: 8px; text-align: left;\">\u09aa\u09cd\u09af\u09be\u09b0\u09be\u09ae\u09bf\u099f\u09be\u09b0<\/th>\n<th style=\"padding: 8px; text-align: left;\">IEC 60947-2 (MCCB - \u09b6\u09bf\u09b2\u09cd\u09aa)<\/th>\n<th style=\"padding: 8px; text-align: left;\">IEC 60898-1 (MCB - \u0986\u09ac\u09be\u09b8\u09bf\u0995)<\/th>\n<th style=\"padding: 8px; text-align: left;\">\u09ae\u09c2\u09b2 \u09aa\u09be\u09b0\u09cd\u09a5\u0995\u09cd\u09af<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding: 8px;\"><strong>\u09b0\u09c7\u09ab\u09be\u09b0\u09c7\u09a8\u09cd\u09b8 \u09aa\u09b0\u09bf\u09ac\u09c7\u09b7\u09cd\u099f\u09bf\u09a4<\/strong><\/td>\n<td style=\"padding: 8px;\">40\u00b0C (\u0995\u09bf\u099b\u09c1 \u0985\u09cd\u09af\u09be\u09aa\u09cd\u09b2\u09bf\u0995\u09c7\u09b6\u09a8\u09c7\u09b0 \u099c\u09a8\u09cd\u09af 30\u00b0C \u09b9\u09a4\u09c7 \u09aa\u09be\u09b0\u09c7)<\/td>\n<td style=\"padding: 8px;\">30\u00b0C \u09b8\u09cd\u099f\u09cd\u09af\u09be\u09a8\u09cd\u09a1\u09be\u09b0\u09cd\u09a1 \u09b0\u09c7\u09ab\u09be\u09b0\u09c7\u09a8\u09cd\u09b8<\/td>\n<td style=\"padding: 8px;\">\u09b6\u09bf\u09b2\u09cd\u09aa \u09ac\u09a8\u09be\u09ae \u0986\u09ac\u09be\u09b8\u09bf\u0995 \u0995\u09cd\u09af\u09be\u09b2\u09bf\u09ac\u09cd\u09b0\u09c7\u09b6\u09a8<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>\u099f\u09be\u09b0\u09cd\u09ae\u09bf\u09a8\u09be\u09b2 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09ac\u09c3\u09a6\u09cd\u09a7\u09bf<\/strong><\/td>\n<td style=\"padding: 8px;\">\u099f\u09be\u09b0\u09cd\u09ae\u09bf\u09a8\u09be\u09b2 \u09a7\u09b0\u09a8\u09c7\u09b0 \u0989\u09aa\u09b0 \u09a8\u09bf\u09b0\u09cd\u09ad\u09b0 \u0995\u09b0\u09c7 50-70\u00b0C<\/td>\n<td style=\"padding: 8px;\">\u09b8\u09cd\u0995\u09cd\u09b0\u09c1 \u099f\u09be\u09b0\u09cd\u09ae\u09bf\u09a8\u09be\u09b2\u09c7\u09b0 \u099c\u09a8\u09cd\u09af 60\u00b0C<\/td>\n<td style=\"padding: 8px;\">\u0989\u09aa\u09be\u09a6\u09be\u09a8-\u09a8\u09bf\u09b0\u09cd\u09a6\u09bf\u09b7\u09cd\u099f \u09b8\u09c0\u09ae\u09be<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>\u0985\u09aa\u09be\u09b0\u09c7\u099f\u09bf\u0982 \u09b9\u09cd\u09af\u09be\u09a8\u09cd\u09a1\u09c7\u09b2<\/strong><\/td>\n<td style=\"padding: 8px;\">55\u00b0C \u09ac\u09c3\u09a6\u09cd\u09a7\u09bf (\u09a7\u09be\u09a4\u09ac), 70\u00b0C \u09ac\u09c3\u09a6\u09cd\u09a7\u09bf (\u0987\u09a8\u09b8\u09c1\u09b2\u09c7\u099f\u09bf\u0982)<\/td>\n<td style=\"padding: 8px;\">\u0985\u09a8\u09c1\u09b0\u09c2\u09aa \u09aa\u09cd\u09b0\u09af\u09bc\u09cb\u099c\u09a8\u09c0\u09af\u09bc\u09a4\u09be<\/td>\n<td style=\"padding: 8px;\">\u09ac\u09cd\u09af\u09ac\u09b9\u09be\u09b0\u0995\u09be\u09b0\u09c0\u09b0 \u09af\u09cb\u0997\u09be\u09af\u09cb\u0997\u09c7\u09b0 \u09a8\u09bf\u09b0\u09be\u09aa\u09a4\u09cd\u09a4\u09be<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>\u0998\u09c7\u09b0\u09c7\u09b0 \u0989\u09aa\u09b0\u09bf\u09ad\u09be\u0997<\/strong><\/td>\n<td style=\"padding: 8px;\">\u0989\u09aa\u09be\u09a6\u09be\u09a8\u09c7\u09b0 \u0989\u09aa\u09b0 \u09a8\u09bf\u09b0\u09cd\u09ad\u09b0 \u0995\u09b0\u09c7 60-80\u00b0C \u09ac\u09c3\u09a6\u09cd\u09a7\u09bf<\/td>\n<td style=\"padding: 8px;\">60\u00b0C \u09ac\u09c3\u09a6\u09cd\u09a7\u09bf \u09b8\u09be\u09a7\u09be\u09b0\u09a3<\/td>\n<td style=\"padding: 8px;\">\u09a6\u09c2\u09b7\u09a3 \u09a1\u09bf\u0997\u09cd\u09b0\u09bf\u09b0 \u0989\u09aa\u09b0 \u09a8\u09bf\u09b0\u09cd\u09ad\u09b0 \u0995\u09b0\u09c7 \u09aa\u09b0\u09bf\u09ac\u09b0\u09cd\u09a4\u09bf\u09a4 \u09b9\u09af\u09bc<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>\u09a4\u09be\u09aa\u09c0\u09af\u09bc \u099f\u09cd\u09b0\u09bf\u09aa \u0995\u09cd\u09af\u09be\u09b2\u09bf\u09ac\u09cd\u09b0\u09c7\u09b6\u09a8<\/strong><\/td>\n<td style=\"padding: 8px;\">\u09b0\u09c7\u099f\u09c7\u09a1 \u0995\u09be\u09b0\u09c7\u09a8\u09cd\u099f\u09c7, 40\u00b0C \u09aa\u09b0\u09bf\u09ac\u09c7\u09b7\u09cd\u099f\u09bf\u09a4<\/td>\n<td style=\"padding: 8px;\">\u09b0\u09c7\u099f\u09c7\u09a1 \u0995\u09be\u09b0\u09c7\u09a8\u09cd\u099f\u09c7, \u09e9\u09e6\u00b0C \u09aa\u09b0\u09bf\u09ac\u09c7\u09b7\u09cd\u099f\u09bf\u09a4 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be<\/td>\n<td style=\"padding: 8px;\">\u09aa\u09cd\u09b0\u09ad\u09be\u09ac\u09bf\u09a4 \u0995\u09b0\u09c7 <a href=\"https:\/\/test.viox.com\/bn\/mcb-ambient-temperature-ratings-and-derating-factors\/\">\u09a1\u09bf-\u09b0\u09c7\u099f\u09bf\u0982 \u09ab\u09cd\u09af\u09be\u0995\u09cd\u099f\u09b0<\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>\u0997\u09c1\u09b0\u09c1\u09a4\u09cd\u09ac\u09aa\u09c2\u09b0\u09cd\u09a3 \u09a8\u09cb\u099f<\/strong>: IEC 60947-2 \u09aa\u09cd\u09b0\u09af\u09cb\u099c\u09cd\u09af <a href=\"https:\/\/test.viox.com\/bn\/what-is-a-molded-case-circuit-breaker-mccb\/\">\u5851\u58f3\u65ad\u8def\u5668\uff08MCCB\uff09<\/a> \u09af\u09be \u0989\u099a\u09cd\u099a \u09ab\u09b2\u09cd\u099f \u09b2\u09c7\u09ad\u09c7\u09b2 \u098f\u09ac\u0982 \u0986\u09b0\u0993 \u09ac\u09c7\u09b6\u09bf \u099a\u09be\u09b9\u09bf\u09a6\u09be \u09b8\u09ae\u09cd\u09aa\u09a8\u09cd\u09a8 \u09aa\u09b0\u09bf\u09ac\u09c7\u09b6\u0997\u09a4 \u0985\u09ac\u09b8\u09cd\u09a5\u09be\u09b0 \u09b8\u09be\u09a5\u09c7 \u09b6\u09bf\u09b2\u09cd\u09aa \u0985\u09cd\u09af\u09be\u09aa\u09cd\u09b2\u09bf\u0995\u09c7\u09b6\u09a8\u0997\u09c1\u09b2\u09bf\u09b0 \u099c\u09a8\u09cd\u09af \u09a1\u09bf\u099c\u09be\u0987\u09a8 \u0995\u09b0\u09be \u09b9\u09af\u09bc\u09c7\u099b\u09c7, \u09af\u09c7\u0996\u09be\u09a8\u09c7 IEC 60898-1 \u0986\u09ac\u09be\u09b8\u09bf\u0995 \u098f\u09ac\u0982 \u09b9\u09be\u09b2\u0995\u09be \u09ac\u09be\u09a3\u09bf\u099c\u09cd\u09af\u09bf\u0995 \u09ac\u09cd\u09af\u09ac\u09b9\u09be\u09b0\u09c7\u09b0 \u099c\u09a8\u09cd\u09af \u0995\u09cd\u09b7\u09c1\u09a6\u09cd\u09b0\u09be\u0995\u09c3\u09a4\u09bf\u09b0 \u09b8\u09be\u09b0\u09cd\u0995\u09bf\u099f \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0\u0997\u09c1\u09b2\u09bf\u0995\u09c7 \u09a8\u09bf\u09af\u09bc\u09a8\u09cd\u09a4\u09cd\u09b0\u09a3 \u0995\u09b0\u09c7\u0964.<\/p>\n<figure style=\"text-align: center; margin: 20px 0;\">\n        <img decoding=\"async\" src=\"https:\/\/img.viox.com\/Circuit-breaker-heat-flow-schematic.webp\" alt=\"Technical diagram showing temperature zones and heat flow in VIOX circuit breaker per IEC 60947 standards\" style=\"max-width: 100%; height: auto;\"><figcaption style=\"font-style: italic; margin-top: 8px;\">\u099a\u09bf\u09a4\u09cd\u09b0 \u09e9: \u098f\u0995\u099f\u09bf VIOX \u09b8\u09be\u09b0\u09cd\u0995\u09bf\u099f \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0\u09c7\u09b0 \u09ae\u09a7\u09cd\u09af\u09c7 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u0985\u099e\u09cd\u099a\u09b2 \u098f\u09ac\u0982 \u09a4\u09be\u09aa \u09aa\u09cd\u09b0\u09ac\u09be\u09b9\u09c7\u09b0 \u09aa\u09a5 \u099a\u09bf\u09a4\u09cd\u09b0\u09bf\u09a4 \u0995\u09b0\u09c7 \u09aa\u09b0\u09bf\u0995\u09b2\u09cd\u09aa\u09bf\u09a4 \u09a1\u09be\u09af\u09bc\u09be\u0997\u09cd\u09b0\u09be\u09ae, \u09af\u09be IEC 60947 \u09ae\u09c7\u09a8\u09c7 \u099a\u09b2\u09c7\u0964.<\/figcaption><\/figure>\n<h2>\u09ac\u09bf\u09ad\u09bf\u09a8\u09cd\u09a8 \u09aa\u09b0\u09bf\u09ac\u09c7\u09b7\u09cd\u099f\u09bf\u09a4 \u09aa\u09b0\u09bf\u09b8\u09cd\u09a5\u09bf\u09a4\u09bf\u09a4\u09c7 \u09aa\u09b0\u09ae \u09b8\u09b0\u09cd\u09ac\u09cb\u099a\u09cd\u099a \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be<\/h2>\n<p>\u09ac\u09be\u09b8\u09cd\u09a4\u09ac-\u09ac\u09bf\u09b6\u09cd\u09ac\u09c7\u09b0 \u0987\u09a8\u09b8\u09cd\u099f\u09b2\u09c7\u09b6\u09a8\u0997\u09c1\u09b2\u09bf \u0996\u09c1\u09ac \u0995\u09ae\u0987 \u09b8\u09cd\u099f\u09cd\u09af\u09be\u09a8\u09cd\u09a1\u09be\u09b0\u09cd\u09a1 \u09ea\u09e6\u00b0C \u0995\u09cd\u09af\u09be\u09b2\u09bf\u09ac\u09cd\u09b0\u09c7\u09b6\u09a8 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be\u09af\u09bc \u0995\u09be\u099c \u0995\u09b0\u09c7\u0964 \u09ac\u09bf\u09ad\u09bf\u09a8\u09cd\u09a8 \u09aa\u09b0\u09bf\u09ac\u09c7\u09b7\u09cd\u099f\u09bf\u09a4 \u09aa\u09b0\u09bf\u09b8\u09cd\u09a5\u09bf\u09a4\u09bf\u09a4\u09c7 \u09aa\u09b0\u09ae \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09b8\u09c0\u09ae\u09be \u09ac\u09cb\u099d\u09be \u09b8\u09a0\u09bf\u0995 \u09aa\u09cd\u09b0\u09af\u09bc\u09cb\u0997\u09c7\u09b0 \u099c\u09a8\u09cd\u09af \u0985\u09a4\u09cd\u09af\u09a8\u09cd\u09a4 \u0997\u09c1\u09b0\u09c1\u09a4\u09cd\u09ac\u09aa\u09c2\u09b0\u09cd\u09a3\u0964.<\/p>\n<h3>\u099f\u09c7\u09ac\u09bf\u09b2 \u09e9: \u09ac\u09bf\u09ad\u09bf\u09a8\u09cd\u09a8 \u09aa\u09b0\u09bf\u09ac\u09c7\u09b7\u09cd\u099f\u09bf\u09a4 \u09aa\u09b0\u09bf\u09b8\u09cd\u09a5\u09bf\u09a4\u09bf\u09a4\u09c7 \u09aa\u09b0\u09ae \u09b8\u09b0\u09cd\u09ac\u09cb\u099a\u09cd\u099a \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be<\/h3>\n<table border=\"1\" style=\"width: 100%; border-collapse: collapse; margin-bottom: 20px;\">\n<thead>\n<tr style=\"background-color: #f2f2f2;\">\n<th style=\"padding: 8px; text-align: left;\">\u09aa\u09b0\u09bf\u09ac\u09c7\u09b7\u09cd\u099f\u09bf\u09a4 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be<\/th>\n<th style=\"padding: 8px; text-align: left;\">\u09b8\u09cd\u099f\u09cd\u09af\u09be\u09a8\u09cd\u09a1\u09be\u09b0\u09cd\u09a1 \u09b0\u09c7\u099f\u09c7\u09a1 \u099f\u09be\u09b0\u09cd\u09ae\u09bf\u09a8\u09be\u09b2 (\u09eb\u09e6\u00b0C \u09ac\u09c3\u09a6\u09cd\u09a7\u09bf)<\/th>\n<th style=\"padding: 8px; text-align: left;\">100% \u09b0\u09c7\u099f\u09c7\u09a1 \u099f\u09be\u09b0\u09cd\u09ae\u09bf\u09a8\u09be\u09b2 (\u09ec\u09e6\u00b0C \u09ac\u09c3\u09a6\u09cd\u09a7\u09bf)<\/th>\n<th style=\"padding: 8px; text-align: left;\">\u09a7\u09be\u09a4\u09ac \u09b9\u09be\u09a4\u09b2 (\u09ec\u09e6\u00b0C \u09b8\u09b0\u09cd\u09ac\u09cb\u099a\u09cd\u099a)<\/th>\n<th style=\"padding: 8px; text-align: left;\">\u0985\u09a7\u09be\u09a4\u09ac \u09b9\u09be\u09a4\u09b2 (\u09ee\u09eb\u00b0C \u09b8\u09b0\u09cd\u09ac\u09cb\u099a\u09cd\u099a)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding: 8px;\"><strong>\u09e8\u09eb\u00b0C (\u09ed\u09ed\u00b0F)<\/strong><\/td>\n<td style=\"padding: 8px;\">\u09ed\u09eb\u00b0C (\u09e7\u09ec\u09ed\u00b0F)<\/td>\n<td style=\"padding: 8px;\">\u09ee\u09eb\u00b0C (\u09e7\u09ee\u09eb\u00b0F)<\/td>\n<td style=\"padding: 8px;\">60\u00b0C (140\u00b0F)<\/td>\n<td style=\"padding: 8px;\">\u09ee\u09eb\u00b0C (\u09e7\u09ee\u09eb\u00b0F)<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>30\u00b0C (86\u00b0F)<\/strong><\/td>\n<td style=\"padding: 8px;\">\u09ee\u09e6\u00b0C (\u09e7\u09ed\u09ec\u00b0F)<\/td>\n<td style=\"padding: 8px;\">\u09ef\u09e6\u00b0C (\u09e7\u09ef\u09ea\u00b0F)<\/td>\n<td style=\"padding: 8px;\">60\u00b0C (140\u00b0F)<\/td>\n<td style=\"padding: 8px;\">\u09ee\u09eb\u00b0C (\u09e7\u09ee\u09eb\u00b0F)<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>\u09ea\u09e6\u00b0C (\u09e7\u09e6\u09ea\u00b0F)<\/strong><\/td>\n<td style=\"padding: 8px;\">\u09ef\u09e6\u00b0C (\u09e7\u09ef\u09ea\u00b0F)<\/td>\n<td style=\"padding: 8px;\">\u09e7\u09e6\u09e6\u00b0C (\u09e8\u09e7\u09e8\u00b0F)<\/td>\n<td style=\"padding: 8px;\">60\u00b0C (140\u00b0F)<\/td>\n<td style=\"padding: 8px;\">\u09ee\u09eb\u00b0C (\u09e7\u09ee\u09eb\u00b0F)<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>50\u00b0C (122\u00b0F)<\/strong><\/td>\n<td style=\"padding: 8px;\">\u09e7\u09e6\u09e6\u00b0C (\u09e8\u09e7\u09e8\u00b0F) \u26a0\ufe0f<\/td>\n<td style=\"padding: 8px;\">\u09e7\u09e7\u09e6\u00b0C (\u09e8\u09e9\u09e6\u00b0F) \u26a0\ufe0f<\/td>\n<td style=\"padding: 8px;\">60\u00b0C (140\u00b0F)<\/td>\n<td style=\"padding: 8px;\">\u09ee\u09eb\u00b0C (\u09e7\u09ee\u09eb\u00b0F)<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>60\u00b0C (140\u00b0F)<\/strong><\/td>\n<td style=\"padding: 8px;\">\u09e7\u09e7\u09e6\u00b0C (\u09e8\u09e9\u09e6\u00b0F) \u274c<\/td>\n<td style=\"padding: 8px;\">\u09e7\u09e8\u09e6\u00b0C (\u09e8\u09ea\u09ee\u00b0F) \u274c<\/td>\n<td style=\"padding: 8px;\">60\u00b0C (140\u00b0F)<\/td>\n<td style=\"padding: 8px;\">\u09ee\u09eb\u00b0C (\u09e7\u09ee\u09eb\u00b0F)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u26a0\ufe0f = \u09a1\u09bf-\u09b0\u09c7\u099f\u09bf\u0982 \u09ac\u09be \u0989\u09a8\u09cd\u09a8\u09a4 \u0995\u09c1\u09b2\u09bf\u0982 \u09aa\u09cd\u09b0\u09af\u09bc\u09cb\u099c\u09a8<br \/>\n    \u274c = \u09b8\u09be\u09a7\u09be\u09b0\u09a3 \u0995\u09a8\u09cd\u09a1\u09be\u0995\u09cd\u099f\u09b0 \u0987\u09a8\u09cd\u09b8\u09c1\u09b2\u09c7\u09b6\u09a8 \u09b0\u09c7\u099f\u09bf\u0982 \u0985\u09a4\u09bf\u0995\u09cd\u09b0\u09ae \u0995\u09b0\u09c7 (\u09ef\u09e6\u00b0C THHN\/XHHW)<\/p>\n<p><strong>\u0997\u09c1\u09b0\u09c1\u09a4\u09cd\u09ac\u09aa\u09c2\u09b0\u09cd\u09a3<\/strong>: \u0989\u099a\u09cd\u099a \u09aa\u09b0\u09bf\u09ac\u09c7\u09b7\u09cd\u099f\u09bf\u09a4 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be\u09af\u09bc, \u099f\u09be\u09b0\u09cd\u09ae\u09bf\u09a8\u09be\u09b2\u0997\u09c1\u09b2\u09bf \u09b8\u09cd\u099f\u09cd\u09af\u09be\u09a8\u09cd\u09a1\u09be\u09b0\u09cd\u09a1 \u09ed\u09eb\u00b0C \u09ac\u09be \u09ef\u09e6\u00b0C \u0995\u09a8\u09cd\u09a1\u09be\u0995\u09cd\u099f\u09b0 \u0987\u09a8\u09cd\u09b8\u09c1\u09b2\u09c7\u09b6\u09a8\u09c7\u09b0 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09b0\u09c7\u099f\u09bf\u0982 \u0985\u09a4\u09bf\u0995\u09cd\u09b0\u09ae \u0995\u09b0\u09a4\u09c7 \u09aa\u09be\u09b0\u09c7\u0964 \u098f\u0987 \u0995\u09be\u09b0\u09a3\u09c7 <a href=\"https:\/\/test.viox.com\/bn\/electrical-derating-temperature-altitude-grouping-factors\/\">\u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be\u09b0 \u099c\u09a8\u09cd\u09af \u09ac\u09c8\u09a6\u09cd\u09af\u09c1\u09a4\u09bf\u0995 \u09a1\u09bf-\u09b0\u09c7\u099f\u09bf\u0982<\/a> \u0997\u09b0\u09ae \u09aa\u09b0\u09bf\u09ac\u09c7\u09b6\u09c7 \u0997\u09c1\u09b0\u09c1\u09a4\u09cd\u09ac\u09aa\u09c2\u09b0\u09cd\u09a3 \u09b9\u09af\u09bc\u09c7 \u0993\u09a0\u09c7\u0964.<\/p>\n<h2>\u09a4\u09be\u09aa\u09c0\u09af\u09bc \u09aa\u09b0\u09c0\u0995\u09cd\u09b7\u09be \u09aa\u09a6\u09cd\u09a7\u09a4\u09bf \u098f\u09ac\u0982 \u0995\u09cd\u09af\u09be\u09b2\u09bf\u09ac\u09cd\u09b0\u09c7\u09b6\u09a8<\/h2>\n<p>UL 489 \u098f\u09ac\u0982 IEC 60947-2 \u0989\u09ad\u09af\u09bc\u0995\u09c7\u0987 \u09a8\u09bf\u09b0\u09cd\u09ae\u09be\u09a4\u09be\u09a6\u09c7\u09b0 \u09ac\u09cd\u09af\u09be\u09aa\u0995 \u09a4\u09be\u09aa\u09c0\u09af\u09bc \u09aa\u09b0\u09c0\u0995\u09cd\u09b7\u09be \u09aa\u09b0\u09bf\u099a\u09be\u09b2\u09a8\u09be \u0995\u09b0\u09a4\u09c7 \u09b9\u09af\u09bc:<\/p>\n<ol>\n<li><strong>\u09aa\u09b0\u09c0\u0995\u09cd\u09b7\u09be\u09b0 \u09b8\u09c7\u099f\u0986\u09aa<\/strong>: \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0\u0997\u09c1\u09b2\u09bf \u09a4\u09be\u09a6\u09c7\u09b0 \u0989\u09a6\u09cd\u09a6\u09bf\u09b7\u09cd\u099f \u0995\u09a8\u09ab\u09bf\u0997\u09be\u09b0\u09c7\u09b6\u09a8\u09c7 (\u09ac\u09a6\u09cd\u09a7 \u09ac\u09be \u0996\u09cb\u09b2\u09be) \u09ae\u09be\u0989\u09a8\u09cd\u099f \u0995\u09b0\u09be \u09b9\u09af\u09bc \u098f\u09ac\u0982 \u09b0\u09c7\u099f\u09c7\u09a1 \u0995\u09be\u09b0\u09c7\u09a8\u09cd\u099f\u09c7 \u09b2\u09cb\u09a1 \u0995\u09b0\u09be \u09b9\u09af\u09bc<\/li>\n<li><strong>\u09b8\u09cd\u09a5\u09bf\u09a4\u09bf\u09b6\u09c0\u09b2\u09a4\u09be \u09b8\u09ae\u09af\u09bc\u0995\u09be\u09b2<\/strong>: \u09a4\u09be\u09aa\u09c0\u09af\u09bc \u09b8\u09be\u09ae\u09cd\u09af\u09be\u09ac\u09b8\u09cd\u09a5\u09be \u0985\u09b0\u09cd\u099c\u09bf\u09a4 \u09a8\u09be \u09b9\u0993\u09af\u09bc\u09be \u09aa\u09b0\u09cd\u09af\u09a8\u09cd\u09a4 \u09a8\u09cd\u09af\u09c2\u09a8\u09a4\u09ae \u09e9 \u0998\u09a8\u09cd\u099f\u09be \u098f\u0995\u099f\u09be\u09a8\u09be \u0985\u09aa\u09be\u09b0\u09c7\u09b6\u09a8<\/li>\n<li><strong>\u09aa\u09b0\u09bf\u09ae\u09be\u09aa \u09ac\u09bf\u09a8\u09cd\u09a6\u09c1<\/strong>: \u099f\u09be\u09b0\u09cd\u09ae\u09bf\u09a8\u09be\u09b2, \u09b9\u09be\u09a4\u09b2 \u098f\u09ac\u0982 \u0998\u09c7\u09b0\u09c7\u09b0 \u09aa\u09c3\u09b7\u09cd\u09a0\u09c7 \u09a5\u09be\u09b0\u09cd\u09ae\u09cb\u0995\u09b2 \u09b8\u09cd\u09a5\u09be\u09aa\u09a8 \u0995\u09b0\u09be \u09b9\u09af\u09bc<\/li>\n<li><strong>\u09aa\u09b0\u09bf\u09ac\u09c7\u09b7\u09cd\u099f\u09bf\u09a4 \u09a8\u09bf\u09af\u09bc\u09a8\u09cd\u09a4\u09cd\u09b0\u09a3<\/strong>: \u09ea\u09e6\u00b0C \u09aa\u09b0\u09bf\u09ac\u09c7\u09b7\u09cd\u099f\u09bf\u09a4 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be\u09af\u09bc (UL 489) \u09ac\u09be \u09aa\u09cd\u09b0\u09b8\u09cd\u09a4\u09c1\u09a4\u0995\u09be\u09b0\u0995\u09c7\u09b0 \u0998\u09cb\u09b7\u09bf\u09a4 \u09b0\u09c7\u09ab\u09be\u09b0\u09c7\u09a8\u09cd\u09b8 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be (IEC) \u0985\u09a8\u09c1\u09af\u09be\u09af\u09bc\u09c0 \u09aa\u09b0\u09c0\u0995\u09cd\u09b7\u09be \u09aa\u09b0\u09bf\u099a\u09be\u09b2\u09a8\u09be \u0995\u09b0\u09be \u09b9\u09af\u09bc<\/li>\n<li><strong>\u09aa\u09be\u09b8\/\u09ab\u09c7\u09b2 \u09ae\u09be\u09a8\u09a6\u09a3\u09cd\u09a1<\/strong>: \u09b8\u09ae\u09b8\u09cd\u09a4 \u09aa\u09b0\u09bf\u09ae\u09be\u09aa \u09ac\u09bf\u09a8\u09cd\u09a6\u09c1 \u09a8\u09bf\u09b0\u09cd\u09a6\u09bf\u09b7\u09cd\u099f \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09ac\u09c3\u09a6\u09cd\u09a7\u09bf \u09b8\u09c0\u09ae\u09be\u09b0 \u09a8\u09c0\u099a\u09c7 \u09a5\u09be\u0995\u09a4\u09c7 \u09b9\u09ac\u09c7<\/li>\n<\/ol>\n<p>VIOX \u09aa\u09cd\u09b0\u09a4\u09bf\u099f\u09bf\u099f\u09bf\u09b0 \u0989\u09aa\u09b0 \u09a4\u09be\u09aa\u09c0\u09af\u09bc \u09aa\u09b0\u09c0\u0995\u09cd\u09b7\u09be \u099a\u09be\u09b2\u09be\u09af\u09bc <a href=\"https:\/\/test.viox.com\/bn\/types-of-circuit-breakers\/\">\u09b8\u09be\u09b0\u09cd\u0995\u09bf\u099f \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0 \u09a1\u09bf\u099c\u09be\u0987\u09a8<\/a> \u0986\u09ae\u09be\u09a6\u09c7\u09b0 \u09b8\u09cd\u09ac\u09c0\u0995\u09c3\u09a4 \u09aa\u09b0\u09c0\u0995\u09cd\u09b7\u09be\u0997\u09be\u09b0\u0997\u09c1\u09b2\u09bf\u09a4\u09c7, IEC \u098f\u09ac\u0982 UL \u0989\u09ad\u09af\u09bc \u09aa\u09cd\u09b0\u09af\u09bc\u09cb\u099c\u09a8\u09c0\u09af\u09bc\u09a4\u09be \u09ae\u09c7\u09a8\u09c7 \u099a\u09b2\u09be \u09a8\u09bf\u09b6\u09cd\u099a\u09bf\u09a4 \u0995\u09b0\u09c7\u0964 \u098f\u0987 \u09a6\u09cd\u09ac\u09c8\u09a4 \u09b8\u09be\u09b0\u09cd\u099f\u09bf\u09ab\u09bf\u0995\u09c7\u09b6\u09a8 \u0986\u09ae\u09be\u09a6\u09c7\u09b0 \u09aa\u09a3\u09cd\u09af\u0997\u09c1\u09b2\u09bf\u0995\u09c7 \u0986\u09a4\u09cd\u09ae\u09ac\u09bf\u09b6\u09cd\u09ac\u09be\u09b8\u09c7\u09b0 \u09b8\u09be\u09a5\u09c7 \u09ac\u09bf\u09b6\u09cd\u09ac \u09ac\u09be\u099c\u09be\u09b0\u09c7 \u09aa\u09b0\u09bf\u09b7\u09c7\u09ac\u09be \u09a6\u09bf\u09a4\u09c7 \u09a6\u09c7\u09af\u09bc\u0964.<\/p>\n<figure style=\"text-align: center; margin: 20px 0;\">\n        <img decoding=\"async\" src=\"https:\/\/img.viox.com\/Terminal-temperature-comparison-chart.webp\" alt=\"Comparison of terminal temperature rise limits for standard vs 100% rated VIOX circuit breakers\" style=\"max-width: 100%; height: auto;\"><figcaption style=\"font-style: italic; margin-top: 8px;\">\u099a\u09bf\u09a4\u09cd\u09b0 \u09ea: \u09b8\u09cd\u099f\u09cd\u09af\u09be\u09a8\u09cd\u09a1\u09be\u09b0\u09cd\u09a1 \u09b0\u09c7\u099f\u09c7\u09a1 \u09ac\u09a8\u09be\u09ae 100% \u09b0\u09c7\u099f\u09c7\u09a1 VIOX \u09b8\u09be\u09b0\u09cd\u0995\u09bf\u099f \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0\u09c7\u09b0 \u099c\u09a8\u09cd\u09af \u099f\u09be\u09b0\u09cd\u09ae\u09bf\u09a8\u09be\u09b2 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09ac\u09c3\u09a6\u09cd\u09a7\u09bf \u09b8\u09c0\u09ae\u09be\u09b0 \u09aa\u09be\u09b6\u09be\u09aa\u09be\u09b6\u09bf \u09a4\u09c1\u09b2\u09a8\u09be\u0964.<\/figcaption><\/figure>\n<h2>\u0987\u09a8\u09ab\u09cd\u09b0\u09be\u09b0\u09c7\u09a1 \u09a5\u09be\u09b0\u09cd\u09ae\u09cb\u0997\u09cd\u09b0\u09be\u09ab\u09bf: \u09ac\u09cd\u09af\u09ac\u09b9\u09be\u09b0\u09bf\u0995 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09aa\u09b0\u09cd\u09af\u09ac\u09c7\u0995\u09cd\u09b7\u09a3<\/h2>\n<p>\u0987\u09a8\u09ab\u09cd\u09b0\u09be\u09b0\u09c7\u09a1 (IR) \u09a5\u09be\u09b0\u09cd\u09ae\u09cb\u0997\u09cd\u09b0\u09be\u09ab\u09bf \u0985-\u0986\u0995\u09cd\u09b0\u09ae\u09a3\u0995\u09be\u09b0\u09c0 \u09b8\u09be\u09b0\u09cd\u0995\u09bf\u099f \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09aa\u09b0\u09cd\u09af\u09ac\u09c7\u0995\u09cd\u09b7\u09a3\u09c7\u09b0 \u099c\u09a8\u09cd\u09af \u09b6\u09bf\u09b2\u09cd\u09aa \u09ae\u09be\u09a8 \u09b9\u09af\u09bc\u09c7 \u0989\u09a0\u09c7\u099b\u09c7\u0964 \u09a4\u09ac\u09c7, \u09b8\u09a0\u09bf\u0995 \u09ac\u09cd\u09af\u09be\u0996\u09cd\u09af\u09be\u09b0 \u099c\u09a8\u09cd\u09af \u09aa\u09cd\u09b0\u09af\u09c1\u0995\u09cd\u09a4\u09bf \u098f\u09ac\u0982 \u09ae\u09be\u09a8 \u0989\u09ad\u09af\u09bc\u0987 \u09ac\u09cb\u099d\u09be \u09a6\u09b0\u0995\u09be\u09b0\u0964.<\/p>\n<h3>\u099f\u09c7\u09ac\u09bf\u09b2 \u09ea: \u0986\u0987\u0986\u09b0 \u09a5\u09be\u09b0\u09cd\u09ae\u09cb\u0997\u09cd\u09b0\u09be\u09ab\u09bf \u09ac\u09cd\u09af\u09be\u0996\u09cd\u09af\u09be \u0997\u09be\u0987\u09a1<\/h3>\n<table border=\"1\" style=\"width: 100%; border-collapse: collapse; margin-bottom: 20px;\">\n<thead>\n<tr style=\"background-color: #f2f2f2;\">\n<th style=\"padding: 8px; text-align: left;\">\u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09ac\u09c3\u09a6\u09cd\u09a7\u09bf (\u0394T)<\/th>\n<th style=\"padding: 8px; text-align: left;\">\u09a4\u09be\u09aa\u09c0\u09af\u09bc \u09b8\u09cd\u09ac\u09be\u0995\u09cd\u09b7\u09b0<\/th>\n<th style=\"padding: 8px; text-align: left;\">\u09aa\u09cd\u09b0\u09b8\u09cd\u09a4\u09be\u09ac\u09bf\u09a4 \u09aa\u09a6\u0995\u09cd\u09b7\u09c7\u09aa<\/th>\n<th style=\"padding: 8px; text-align: left;\">\u099c\u09b0\u09c1\u09b0\u09bf \u09b8\u09cd\u09a4\u09b0<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding: 8px;\"><strong>\u09aa\u09b0\u09bf\u09ac\u09c7\u09b7\u09cd\u099f\u09bf\u09a4 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09a5\u09c7\u0995\u09c7 \u09e6-\u09e7\u09e6\u00b0C \u0989\u09aa\u09b0\u09c7<\/strong><\/td>\n<td style=\"padding: 8px;\">\u09a4\u09be\u09aa\u09c0\u09af\u09bc \u099b\u09ac\u09bf\u09a4\u09c7 \u09b8\u09ac\u09c1\u099c\/\u09a8\u09c0\u09b2<\/td>\n<td style=\"padding: 8px;\">\u09b8\u09cd\u09ac\u09be\u09ad\u09be\u09ac\u09bf\u0995 \u0995\u09be\u09b0\u09cd\u09af\u0995\u09cd\u09b0\u09ae; \u09ac\u09c7\u09b8\u09b2\u09be\u0987\u09a8 \u09a8\u09a5\u09bf\u09ad\u09c1\u0995\u09cd\u09a4 \u0995\u09b0\u09c1\u09a8<\/td>\n<td style=\"padding: 8px;\">\u09b0\u09c1\u099f\u09bf\u09a8<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>\u09aa\u09b0\u09bf\u09ac\u09c7\u09b7\u09cd\u099f\u09bf\u09a4 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09a5\u09c7\u0995\u09c7 \u09e7\u09e6-\u09e8\u09e6\u00b0C \u0989\u09aa\u09b0\u09c7<\/strong><\/td>\n<td style=\"padding: 8px;\">\u09a4\u09be\u09aa\u09c0\u09af\u09bc \u099b\u09ac\u09bf\u09a4\u09c7 \u09b9\u09b2\u09c1\u09a6<\/td>\n<td style=\"padding: 8px;\">\u09aa\u09cd\u09b0\u09ac\u09a3\u09a4\u09be \u09a8\u09bf\u09b0\u09c0\u0995\u09cd\u09b7\u09a3 \u0995\u09b0\u09c1\u09a8; \u09b2\u09cb\u09a1 \u09b0\u09c7\u099f\u09bf\u0982 \u09ae\u09a7\u09cd\u09af\u09c7 \u0986\u099b\u09c7 \u0995\u09bf\u09a8\u09be \u09a4\u09be \u09af\u09be\u099a\u09be\u0987 \u0995\u09b0\u09c1\u09a8<\/td>\n<td style=\"padding: 8px;\">\u09a8\u09bf\u09ae\u09cd\u09a8 \u0985\u0997\u09cd\u09b0\u09be\u09a7\u09bf\u0995\u09be\u09b0<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>\u09aa\u09b0\u09bf\u09ac\u09c7\u09b7\u09cd\u099f\u09bf\u09a4 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09a5\u09c7\u0995\u09c7 \u09e8\u09e6-\u09e9\u09e6\u00b0C \u0989\u09aa\u09b0\u09c7<\/strong><\/td>\n<td style=\"padding: 8px;\">\u09a4\u09be\u09aa\u09c0\u09af\u09bc \u099b\u09ac\u09bf\u09a4\u09c7 \u0995\u09ae\u09b2\u09be<\/td>\n<td style=\"padding: 8px;\">\u09b8\u0982\u09af\u09cb\u0997\u0997\u09c1\u09b2\u09bf \u09a4\u09a6\u09a8\u09cd\u09a4 \u0995\u09b0\u09c1\u09a8; \u099f\u09be\u09b0\u09cd\u09ae\u09bf\u09a8\u09be\u09b2 \u099f\u09b0\u09cd\u0995 \u09aa\u09b0\u09c0\u0995\u09cd\u09b7\u09be \u0995\u09b0\u09c1\u09a8; \u0995\u09a8\u09cd\u09a1\u09be\u0995\u09cd\u099f\u09b0\u09c7\u09b0 \u0986\u0995\u09be\u09b0 \u09af\u09be\u099a\u09be\u0987 \u0995\u09b0\u09c1\u09a8<\/td>\n<td style=\"padding: 8px;\">\u09ae\u09be\u099d\u09be\u09b0\u09bf \u0985\u0997\u09cd\u09b0\u09be\u09a7\u09bf\u0995\u09be\u09b0<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>\u09aa\u09b0\u09bf\u09ac\u09c7\u09b7\u09cd\u099f\u09bf\u09a4 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09a5\u09c7\u0995\u09c7 \u09e9\u09e6-\u09ea\u09e6\u00b0C \u0989\u09aa\u09b0\u09c7<\/strong><\/td>\n<td style=\"padding: 8px;\">\u09a4\u09be\u09aa\u09c0\u09af\u09bc \u099b\u09ac\u09bf\u09a4\u09c7 \u09b2\u09be\u09b2<\/td>\n<td style=\"padding: 8px;\">\u0985\u09ac\u09bf\u09b2\u09ae\u09cd\u09ac\u09c7 \u09aa\u09b0\u09bf\u09a6\u09b0\u09cd\u09b6\u09a8\u09c7\u09b0 \u09b8\u09ae\u09af\u09bc\u09b8\u09c2\u099a\u09c0 \u0995\u09b0\u09c1\u09a8; \u09a2\u09bf\u09b2\u09c7 \u09b8\u0982\u09af\u09cb\u0997, \u0995\u09cd\u09b7\u09af\u09bc \u09ac\u09be \u0993\u09ad\u09be\u09b0\u09b2\u09cb\u09a1\u09bf\u0982\u09af\u09bc\u09c7\u09b0 \u099c\u09a8\u09cd\u09af \u09aa\u09b0\u09c0\u0995\u09cd\u09b7\u09be \u0995\u09b0\u09c1\u09a8<\/td>\n<td style=\"padding: 8px;\">\u0989\u099a\u09cd\u099a \u0985\u0997\u09cd\u09b0\u09be\u09a7\u09bf\u0995\u09be\u09b0<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>&gt; \u09aa\u09b0\u09bf\u09ac\u09c7\u09b7\u09cd\u099f\u09bf\u09a4 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09a5\u09c7\u0995\u09c7 \u09ea\u09e6\u00b0C \u0989\u09aa\u09b0\u09c7<\/strong><\/td>\n<td style=\"padding: 8px;\">\u09a5\u09be\u09b0\u09cd\u09ae\u09be\u09b2 \u0987\u09ae\u09c7\u099c\u09c7 \u0997\u09be\u09a2\u09bc \u09b2\u09be\u09b2\/\u09b8\u09be\u09a6\u09be<\/td>\n<td style=\"padding: 8px;\"><strong>\u0985\u09ac\u09bf\u09b2\u09ae\u09cd\u09ac\u09c7 \u09ac\u09cd\u09af\u09ac\u09b8\u09cd\u09a5\u09be \u09a8\u09c7\u0993\u09af\u09bc\u09be \u09aa\u09cd\u09b0\u09af\u09bc\u09cb\u099c\u09a8<\/strong>; \u09b8\u09ae\u09cd\u09ad\u09be\u09ac\u09cd\u09af \u09a8\u09bf\u09b0\u09be\u09aa\u09a4\u09cd\u09a4\u09be \u099d\u09c1\u0981\u0995\u09bf; \u09aa\u09cd\u09b0\u09a4\u09bf\u09b8\u09cd\u09a5\u09be\u09aa\u09a8\u09c7\u09b0 \u09aa\u09b0\u09bf\u0995\u09b2\u09cd\u09aa\u09a8\u09be \u0995\u09b0\u09c1\u09a8<\/td>\n<td style=\"padding: 8px;\">\u09b8\u09ae\u09be\u09b2\u09cb\u099a\u09a8\u09be\u09ae\u09c2\u09b2\u0995<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>\u0986\u0987\u0986\u09b0 \u09b8\u09cd\u0995\u09cd\u09af\u09be\u09a8\u09bf\u0982\u09af\u09bc\u09c7\u09b0 \u099c\u09a8\u09cd\u09af \u09b8\u09c7\u09b0\u09be \u0985\u09a8\u09c1\u09b6\u09c0\u09b2\u09a8<\/strong>:<\/p>\n<ul>\n<li>\u09b8\u09cd\u0995\u09cd\u09af\u09be\u09a8 \u0995\u09b0\u09be\u09b0 \u0986\u0997\u09c7 \u0995\u09ae\u09aa\u0995\u09cd\u09b7\u09c7 \u09e9 \u0998\u09a8\u09cd\u099f\u09be \u09a7\u09b0\u09c7 \u0985\u09ac\u09bf\u099a\u09b2\u09bf\u09a4 \u0985\u09ac\u09b8\u09cd\u09a5\u09be\u09af\u09bc \u0995\u09be\u099c \u0995\u09b0\u09a4\u09c7 \u09a6\u09bf\u09a8<\/li>\n<li>\u09b8\u09a0\u09bf\u0995 \u0394T \u0997\u09a3\u09a8\u09be\u09b0 \u099c\u09a8\u09cd\u09af \u09aa\u09b0\u09bf\u09ac\u09c7\u09b7\u09cd\u099f\u09bf\u09a4 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u0986\u09b2\u09be\u09a6\u09be\u09ad\u09be\u09ac\u09c7 \u09aa\u09b0\u09bf\u09ae\u09be\u09aa \u0995\u09b0\u09c1\u09a8<\/li>\n<li>\u09ac\u09b9\u09bf\u09b0\u09be\u0997\u09a4 \u09b8\u09a8\u09be\u0995\u09cd\u09a4 \u0995\u09b0\u09a4\u09c7 \u0985\u09a8\u09c1\u09b0\u09c2\u09aa \u09b2\u09cb\u09a1\u09c7\u09b0 \u0985\u09a7\u09c0\u09a8\u09c7 \u0985\u09a8\u09c1\u09b0\u09c2\u09aa \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0 \u09a4\u09c1\u09b2\u09a8\u09be \u0995\u09b0\u09c1\u09a8<\/li>\n<li>\u0985\u09ac\u09a8\u09a4\u09bf\u09b0 \u09aa\u09cd\u09b0\u09ac\u09a3\u09a4\u09be \u09b8\u09a8\u09be\u0995\u09cd\u09a4 \u0995\u09b0\u09a4\u09c7 \u09b8\u09ae\u09af\u09bc\u09c7\u09b0 \u09b8\u09be\u09a5\u09c7 \u09b8\u09be\u09a5\u09c7 \u09b0\u09bf\u09a1\u09bf\u0982 \u09a8\u09a5\u09bf\u09ad\u09c1\u0995\u09cd\u09a4 \u0995\u09b0\u09c1\u09a8<\/li>\n<li>\u09a8\u09bf\u09b0\u09cd\u0997\u09ae\u09a8 \u09b8\u09c7\u099f\u09bf\u0982\u09b8 \u09ac\u09bf\u09ac\u09c7\u099a\u09a8\u09be \u0995\u09b0\u09c1\u09a8 (\u09b8\u09be\u09a7\u09be\u09b0\u09a3\u09a4 \u0986\u0981\u0995\u09be \u09aa\u09c3\u09b7\u09cd\u09a0\u09c7\u09b0 \u099c\u09a8\u09cd\u09af \u09e6.\u09ef\u09eb, \u0996\u09be\u09b2\u09bf \u09a4\u09be\u09ae\u09be\u09b0 \u099c\u09a8\u09cd\u09af \u09e6.\u09e9-\u09e6.\u09eb)<\/li>\n<\/ul>\n<h2>\u0997\u09b0\u09ae \u09b8\u09be\u09b0\u09cd\u0995\u09bf\u099f \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0 \u09b8\u09ae\u09b8\u09cd\u09af\u09be \u09b8\u09ae\u09be\u09a7\u09be\u09a8<\/h2>\n<p>\u09af\u0996\u09a8 \u09a5\u09be\u09b0\u09cd\u09ae\u09be\u09b2 \u0987\u09ae\u09c7\u099c\u09bf\u0982 \u09ac\u09be \u09b6\u09be\u09b0\u09c0\u09b0\u09bf\u0995 \u09aa\u09b0\u09bf\u09a6\u09b0\u09cd\u09b6\u09a8elevated \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09aa\u09cd\u09b0\u0995\u09be\u09b6 \u0995\u09b0\u09c7, \u09a4\u0996\u09a8 \u09a8\u09bf\u09af\u09bc\u09ae\u09a4\u09be\u09a8\u09cd\u09a4\u09cd\u09b0\u09bf\u0995 \u09b8\u09ae\u09b8\u09cd\u09af\u09be \u09b8\u09ae\u09be\u09a7\u09be\u09a8 \u0985\u09aa\u09b0\u09bf\u09b9\u09be\u09b0\u09cd\u09af\u0964.<\/p>\n<h3>\u099f\u09c7\u09ac\u09bf\u09b2 \u09eb: \u09b8\u09ae\u09b8\u09cd\u09af\u09be \u09b8\u09ae\u09be\u09a7\u09be\u09a8 \u0997\u09be\u0987\u09a1 - \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09ac\u09a8\u09be\u09ae \u09b8\u09ae\u09b8\u09cd\u09af\u09be \u09a8\u09bf\u09b0\u09cd\u09a3\u09af\u09bc<\/h3>\n<table border=\"1\" style=\"width: 100%; border-collapse: collapse; margin-bottom: 20px;\">\n<thead>\n<tr style=\"background-color: #f2f2f2;\">\n<th style=\"padding: 8px; text-align: left;\">\u09b2\u0995\u09cd\u09b7\u09a3<\/th>\n<th style=\"padding: 8px; text-align: left;\">\u09b8\u09ae\u09cd\u09ad\u09be\u09ac\u09cd\u09af \u0995\u09be\u09b0\u09a3<\/th>\n<th style=\"padding: 8px; text-align: left;\">\u09a1\u09be\u09af\u09bc\u09be\u0997\u09a8\u09b8\u09cd\u099f\u09bf\u0995 \u09aa\u09a6\u0995\u09cd\u09b7\u09c7\u09aa<\/th>\n<th style=\"padding: 8px; text-align: left;\">\u09b8\u09ae\u09be\u09a7\u09be\u09a8<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding: 8px;\"><strong>\u09b6\u09c1\u09a7\u09c1\u09ae\u09be\u09a4\u09cd\u09b0 \u0997\u09b0\u09ae \u099f\u09be\u09b0\u09cd\u09ae\u09bf\u09a8\u09be\u09b2<\/strong><\/td>\n<td style=\"padding: 8px;\">\u09a2\u09bf\u09b2\u09c7 \u09b8\u0982\u09af\u09cb\u0997, \u0986\u09a8\u09cd\u09a1\u09be\u09b0\u09b8\u09be\u0987\u099c\u09a1 \u0995\u09a8\u09cd\u09a1\u09be\u0995\u09cd\u099f\u09b0, \u0989\u099a\u09cd\u099a \u09aa\u09cd\u09b0\u09a4\u09bf\u09b0\u09cb\u09a7\u09c7\u09b0 \u09b8\u0982\u09af\u09cb\u0997<\/td>\n<td style=\"padding: 8px;\">\u099f\u09b0\u09cd\u0995 \u09b8\u09cd\u09aa\u09c7\u09b8\u09bf\u09ab\u09bf\u0995\u09c7\u09b6\u09a8 \u09aa\u09b0\u09c0\u0995\u09cd\u09b7\u09be \u0995\u09b0\u09c1\u09a8; \u0995\u09cd\u09b7\u09af\u09bc \u099c\u09a8\u09cd\u09af \u09aa\u09b0\u09bf\u09a6\u09b0\u09cd\u09b6\u09a8; \u0995\u09a8\u09cd\u09a1\u09be\u0995\u09cd\u099f\u09b0 ampacity \u09af\u09be\u099a\u09be\u0987 \u0995\u09b0\u09c1\u09a8<\/td>\n<td style=\"padding: 8px;\">\u099f\u09be\u09b0\u09cd\u09ae\u09bf\u09a8\u09be\u09b2 \u09aa\u09c1\u09a8\u09b0\u09be\u09af\u09bc \u099f\u09b0\u09cd\u0995 \u0995\u09b0\u09c1\u09a8; \u09aa\u09b0\u09bf\u099a\u09bf\u09a4\u09bf \u09aa\u09b0\u09bf\u09b7\u09cd\u0995\u09be\u09b0 \u0995\u09b0\u09c1\u09a8; \u09aa\u09cd\u09b0\u09af\u09bc\u09cb\u099c\u09a8\u09c7 \u0995\u09a8\u09cd\u09a1\u09be\u0995\u09cd\u099f\u09b0 \u0986\u09aa\u09b8\u09be\u0987\u099c \u0995\u09b0\u09c1\u09a8<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>\u0997\u09b0\u09ae \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0 \u09ac\u09a1\u09bf<\/strong><\/td>\n<td style=\"padding: 8px;\">\u0993\u09ad\u09be\u09b0\u09b2\u09cb\u09a1 \u0985\u09ac\u09b8\u09cd\u09a5\u09be, \u0985\u09ac\u09a8\u09ae\u09bf\u09a4 \u09ac\u09be\u0987\u09ae\u09c7\u099f\u09be\u09b2, \u0985\u09ad\u09cd\u09af\u09a8\u09cd\u09a4\u09b0\u09c0\u09a3 \u09af\u09cb\u0997\u09be\u09af\u09cb\u0997 \u09aa\u09b0\u09bf\u09a7\u09be\u09a8<\/td>\n<td style=\"padding: 8px;\">\u09aa\u09cd\u09b0\u0995\u09c3\u09a4 \u09b2\u09cb\u09a1 \u0995\u09be\u09b0\u09c7\u09a8\u09cd\u099f \u09aa\u09b0\u09bf\u09ae\u09be\u09aa \u0995\u09b0\u09c1\u09a8; \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0 \u09b0\u09c7\u099f\u09bf\u0982 \u09b8\u0999\u09cd\u0997\u09c7 \u09a4\u09c1\u09b2\u09a8\u09be \u0995\u09b0\u09c1\u09a8; \u099f\u09cd\u09b0\u09bf\u09aa \u0995\u09be\u09b0\u09cd\u09ad \u09aa\u09b0\u09c0\u0995\u09cd\u09b7\u09be \u0995\u09b0\u09c1\u09a8<\/td>\n<td style=\"padding: 8px;\">\u09b2\u09cb\u09a1 \u0995\u09ae\u09be\u09a8\u09cb; \u099c\u09c0\u09ac\u09a8\u0995\u09be\u09b2\u09c7\u09b0 \u09b6\u09c7\u09b7\u09c7\u09b0 \u0995\u09be\u099b\u09be\u0995\u09be\u099b\u09bf \u09b9\u09b2\u09c7 \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0 \u09aa\u09cd\u09b0\u09a4\u09bf\u09b8\u09cd\u09a5\u09be\u09aa\u09a8 \u0995\u09b0\u09c1\u09a8<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>\u0997\u09b0\u09ae \u09b9\u09be\u09a4\u09b2<\/strong><\/td>\n<td style=\"padding: 8px;\">\u09aa\u09b0\u09bf\u099a\u09bf\u09a4\u09bf\/\u09ac\u09be\u0987\u09ae\u09c7\u099f\u09be\u09b2 \u09a5\u09c7\u0995\u09c7 \u0985\u09ad\u09cd\u09af\u09a8\u09cd\u09a4\u09b0\u09c0\u09a3 \u09a4\u09be\u09aa \u09b8\u09cd\u09a5\u09be\u09a8\u09be\u09a8\u09cd\u09a4\u09b0 (\u0995\u09bf\u099b\u09c1 \u09aa\u09b0\u09bf\u09ae\u09be\u09a3\u09c7 \u09b8\u09cd\u09ac\u09be\u09ad\u09be\u09ac\u09bf\u0995)<\/td>\n<td style=\"padding: 8px;\">\u09b9\u09be\u09a4\u09b2\u09c7\u09b0 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09af\u09be\u099a\u09be\u0987 \u0995\u09b0\u09c1\u09a8 <60\u00b0C (metallic) or <85\u00b0C (non-metallic)<\/td>\n<td style=\"padding: 8px;\">\u09b8\u09c0\u09ae\u09be\u09b0 \u09ae\u09a7\u09cd\u09af\u09c7 \u09a5\u09be\u0995\u09b2\u09c7, \u0995\u09cb\u09a8\u09cb \u09aa\u09a6\u0995\u09cd\u09b7\u09c7\u09aa\u09c7\u09b0 \u09aa\u09cd\u09b0\u09af\u09bc\u09cb\u099c\u09a8 \u09a8\u09c7\u0987; \u0985\u09a4\u09bf\u0995\u09cd\u09b0\u09ae \u0995\u09b0\u09b2\u09c7, \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0 \u09aa\u09cd\u09b0\u09a4\u09bf\u09b8\u09cd\u09a5\u09be\u09aa\u09a8 \u0995\u09b0\u09c1\u09a8<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>\u09aa\u09c1\u09b0\u09cb \u09aa\u09cd\u09af\u09be\u09a8\u09c7\u09b2 \u0997\u09b0\u09ae<\/strong><\/td>\n<td style=\"padding: 8px;\">\u0985\u09aa\u09b0\u09cd\u09af\u09be\u09aa\u09cd\u09a4 \u09ac\u09be\u09af\u09bc\u09c1\u099a\u09b2\u09be\u099a\u09b2, \u0985\u09a4\u09bf\u09b0\u09bf\u0995\u09cd\u09a4 \u0997\u09cd\u09b0\u09c1\u09aa\u09bf\u0982, \u0989\u099a\u09cd\u099a \u09aa\u09b0\u09bf\u09ac\u09c7\u09b7\u09cd\u099f\u09bf\u09a4<\/td>\n<td style=\"padding: 8px;\">\u0998\u09c7\u09b0 \u09ac\u09be\u09af\u09bc\u09c1\u099a\u09b2\u09be\u099a\u09b2 \u09aa\u09b0\u09c0\u0995\u09cd\u09b7\u09be \u0995\u09b0\u09c1\u09a8; \u09aa\u09cd\u09af\u09be\u09a8\u09c7\u09b2\u09c7\u09b0 \u09ad\u09bf\u09a4\u09b0\u09c7 \u09aa\u09b0\u09bf\u09ac\u09c7\u09b7\u09cd\u099f\u09bf\u09a4 \u09aa\u09b0\u09bf\u09ae\u09be\u09aa \u0995\u09b0\u09c1\u09a8; \u09aa\u09b0\u09cd\u09af\u09be\u09b2\u09cb\u099a\u09a8\u09be \u0995\u09b0\u09c1\u09a8 <a href=\"https:\/\/test.viox.com\/bn\/circuit-breaker-altitude-derating-guide\/\">\u09a1\u09bf-\u09b0\u09c7\u099f\u09bf\u0982 \u09ab\u09cd\u09af\u09be\u0995\u09cd\u099f\u09b0<\/a><\/td>\n<td style=\"padding: 8px;\">\u09ac\u09be\u09af\u09bc\u09c1\u099a\u09b2\u09be\u099a\u09b2 \u0989\u09a8\u09cd\u09a8\u09a4 \u0995\u09b0\u09c1\u09a8; \u09b6\u09c0\u09a4\u09b2\u09c0\u0995\u09b0\u09a3 \u09af\u09cb\u0997 \u0995\u09b0\u09c1\u09a8; NEC\/IEC \u0985\u09a8\u09c1\u09af\u09be\u09af\u09bc\u09c0 \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0 \u09a1\u09bf\u09b0\u09c7\u099f \u0995\u09b0\u09c1\u09a8<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>\u098f\u0995\u099f\u09bf \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0 \u0985\u09ad\u09bf\u09a8\u09cd\u09a8 \u09aa\u09cd\u09b0\u09a4\u09bf\u09ac\u09c7\u09b6\u09c0\u09a6\u09c7\u09b0 \u099a\u09c7\u09af\u09bc\u09c7 \u0989\u09b2\u09cd\u09b2\u09c7\u0996\u09af\u09cb\u0997\u09cd\u09af\u09ad\u09be\u09ac\u09c7 \u09ac\u09c7\u09b6\u09bf \u0997\u09b0\u09ae<\/strong><\/td>\n<td style=\"padding: 8px;\">\u0985\u09ad\u09cd\u09af\u09a8\u09cd\u09a4\u09b0\u09c0\u09a3 \u09a4\u09cd\u09b0\u09c1\u099f\u09bf, \u09af\u09cb\u0997\u09be\u09af\u09cb\u0997 \u0985\u09ac\u09a8\u09a4\u09bf, \u0995\u09cd\u09b0\u09ae\u09be\u0999\u09cd\u0995\u09a8 \u09a1\u09cd\u09b0\u09bf\u09ab\u099f<\/td>\n<td style=\"padding: 8px;\">\u0985\u09a8\u09c1\u09b0\u09c2\u09aa \u09b2\u09cb\u09a1\u09c7\u09b0 \u0985\u09a7\u09c0\u09a8\u09c7 \u0985\u09a8\u09c1\u09b0\u09c2\u09aa \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0\u09c7\u09b0 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09a4\u09c1\u09b2\u09a8\u09be \u0995\u09b0\u09c1\u09a8<\/td>\n<td style=\"padding: 8px;\">\u09b8\u09a8\u09cd\u09a6\u09c7\u09b9\u099c\u09a8\u0995 \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0 \u09aa\u09cd\u09b0\u09a4\u09bf\u09b8\u09cd\u09a5\u09be\u09aa\u09a8 \u0995\u09b0\u09c1\u09a8; \u09ae\u09c2\u09b2 \u0995\u09be\u09b0\u09a3 \u0985\u09a8\u09c1\u09b8\u09a8\u09cd\u09a7\u09be\u09a8 \u0995\u09b0\u09c1\u09a8<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>\u0995\u0996\u09a8 \u09aa\u09cd\u09b0\u09a4\u09bf\u09b8\u09cd\u09a5\u09be\u09aa\u09a8 \u0995\u09b0\u09a4\u09c7 \u09b9\u09ac\u09c7<\/strong>: \u09af\u09a6\u09bf \u098f\u0995\u099f\u09bf \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0 \u09a7\u09be\u09b0\u09be\u09ac\u09be\u09b9\u09bf\u0995\u09ad\u09be\u09ac\u09c7 \u09a4\u09be\u09b0 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09ac\u09c3\u09a6\u09cd\u09a7\u09bf \u09b8\u09c0\u09ae\u09be\u09b0 \u0989\u09aa\u09b0\u09c7 \u0995\u09be\u099c \u0995\u09b0\u09c7 \u098f\u09ae\u09a8\u0995\u09bf \u09b8\u09a0\u09bf\u0995 \u09b2\u09cb\u09a1\u09bf\u0982 \u0985\u09ac\u09b8\u09cd\u09a5\u09be\u09b0 \u0985\u09a7\u09c0\u09a8\u09c7\u0993, \u09aa\u09cd\u09b0\u09a4\u09bf\u09b8\u09cd\u09a5\u09be\u09aa\u09a8 \u09ac\u09be\u09a7\u09cd\u09af\u09a4\u09be\u09ae\u09c2\u09b2\u0995\u0964 \u0985\u09a4\u09bf\u09b0\u09bf\u0995\u09cd\u09a4 \u0997\u09b0\u09ae \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0 \u09aa\u09b0\u09bf\u099a\u09be\u09b2\u09a8\u09be \u0995\u09b0\u09be \u099a\u09be\u09b2\u09bf\u09af\u09bc\u09c7 \u0997\u09c7\u09b2\u09c7 \u09a8\u09bf\u09b0\u09cb\u09a7\u0995 \u09ac\u09cd\u09af\u09b0\u09cd\u09a5\u09a4\u09be, \u0986\u0997\u09c1\u09a8 \u09ac\u09be \u0985\u09a4\u09bf\u09b0\u09bf\u0995\u09cd\u09a4 \u09b8\u09c1\u09b0\u0995\u09cd\u09b7\u09be \u09b9\u09be\u09b0\u09be\u09a8\u09cb\u09b0 \u099d\u09c1\u0981\u0995\u09bf \u09a5\u09be\u0995\u09c7\u0964 \u09b8\u09ae\u09cd\u09aa\u09b0\u09cd\u0995\u09c7 \u0986\u09b0\u0993 \u099c\u09be\u09a8\u09c1\u09a8 <a href=\"https:\/\/test.viox.com\/bn\/how-to-know-if-circuit-breaker-is-bad\/\">\u0996\u09be\u09b0\u09be\u09aa \u09b8\u09be\u09b0\u09cd\u0995\u09bf\u099f \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0 \u09b8\u09a8\u09be\u0995\u09cd\u09a4 \u0995\u09b0\u09be<\/a>.<\/p>\n<figure style=\"text-align: center; margin: 20px 0;\">\n        <img decoding=\"async\" src=\"https:\/\/img.viox.com\/Temperature-troubleshooting-flowchart---Decision-tree-with-color-coded-severity-levels.webp\" alt=\"Temperature-based troubleshooting flowchart for VIOX MCB and MCCB thermal issues\" style=\"max-width: 100%; height: auto;\"><figcaption style=\"font-style: italic; margin-top: 8px;\">\u099a\u09bf\u09a4\u09cd\u09b0 \u09eb: VIOX MCB \u098f\u09ac\u0982 MCCB-\u09a4\u09c7elevated \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09b8\u09ae\u09b8\u09cd\u09af\u09be \u09b8\u09ae\u09be\u09a7\u09be\u09a8\u09c7\u09b0 \u099c\u09a8\u09cd\u09af \u09a7\u09be\u09aa\u09c7 \u09a7\u09be\u09aa\u09c7 \u09a1\u09be\u09af\u09bc\u09be\u0997\u09a8\u09b8\u09cd\u099f\u09bf\u0995 \u09ab\u09cd\u09b2\u09cb\u099a\u09be\u09b0\u09cd\u099f\u0964.<\/figcaption><\/figure>\n<h2>\u0995\u09a8\u09cd\u09a1\u09be\u0995\u09cd\u099f\u09b0 \u0987\u09a8\u09b8\u09c1\u09b2\u09c7\u09b6\u09a8 \u09b8\u09be\u09ae\u099e\u09cd\u099c\u09b8\u09cd\u09af\u09a4\u09be<\/h2>\n<p>\u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09ac\u09c3\u09a6\u09cd\u09a7\u09bf \u09b8\u09c0\u09ae\u09be\u09b0 \u098f\u0995\u099f\u09bf \u0997\u09c1\u09b0\u09c1\u09a4\u09cd\u09ac\u09aa\u09c2\u09b0\u09cd\u09a3 \u0995\u09bf\u09a8\u09cd\u09a4\u09c1 \u09aa\u09cd\u09b0\u09be\u09af\u09bc\u09b6\u0987 \u0989\u09aa\u09c7\u0995\u09cd\u09b7\u09bf\u09a4 \u09a6\u09bf\u0995 \u09b9\u09b2 \u0995\u09a8\u09cd\u09a1\u09be\u0995\u09cd\u099f\u09b0 \u0987\u09a8\u09b8\u09c1\u09b2\u09c7\u09b6\u09a8 \u09b0\u09c7\u099f\u09bf\u0982\u09af\u09bc\u09c7\u09b0 \u09b8\u09be\u09a5\u09c7 \u09a4\u09be\u09a6\u09c7\u09b0 \u09b8\u09ae\u09cd\u09aa\u09b0\u09cd\u0995\u0964 NEC \u098f\u09ac\u0982 IEC \u09ae\u09be\u09a8\u0995\u0997\u09c1\u09b2\u09bf\u09b0 \u09aa\u09cd\u09b0\u09af\u09bc\u09cb\u099c\u09a8 \u09af\u09c7 \u0995\u09a8\u09cd\u09a1\u09be\u0995\u09cd\u099f\u09b0 \u0987\u09a8\u09b8\u09c1\u09b2\u09c7\u09b6\u09a8 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09b0\u09c7\u099f\u09bf\u0982 \u099f\u09be\u09b0\u09cd\u09ae\u09bf\u09a8\u09be\u09b2 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be\u09b0 \u09b8\u09be\u09a5\u09c7 \u09ae\u09c7\u09b2\u09c7 \u09ac\u09be \u0985\u09a4\u09bf\u0995\u09cd\u09b0\u09ae \u0995\u09b0\u09c7\u0964.<\/p>\n<p><strong>\u09b8\u09be\u09a7\u09be\u09b0\u09a3 \u0995\u09a8\u09cd\u09a1\u09be\u0995\u09cd\u099f\u09b0 \u0987\u09a8\u09b8\u09c1\u09b2\u09c7\u09b6\u09a8 \u09aa\u09cd\u09b0\u0995\u09be\u09b0<\/strong>:<\/p>\n<ul>\n<li><strong>60\u00b0C (140\u00b0F)<\/strong>: TW, UF (\u09aa\u09c1\u09b0\u09be\u09a8\u09cb \u0987\u09a8\u09b8\u09cd\u099f\u09b2\u09c7\u09b6\u09a8)<\/li>\n<li><strong>\u09ed\u09eb\u00b0C (\u09e7\u09ec\u09ed\u00b0F)<\/strong>: THW, THWN, RHW, USE<\/li>\n<li><strong>\u09ef\u09e6\u00b0C (\u09e7\u09ef\u09ea\u00b0F)<\/strong>: THHN, THWN-2, XHHW-2, RHH, RHW-2<\/li>\n<\/ul>\n<p>\u09eb\u09e6\u00b0C \u09ac\u09c3\u09a6\u09cd\u09a7\u09bf (\u09ea\u09e6\u00b0C \u09aa\u09b0\u09bf\u09ac\u09c7\u09b7\u09cd\u099f\u09bf\u09a4 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be\u09af\u09bc \u09ef\u09e6\u00b0C \u09aa\u09b0\u09ae) \u09b8\u09b9 \u09b8\u09cd\u099f\u09cd\u09af\u09be\u09a8\u09cd\u09a1\u09be\u09b0\u09cd\u09a1-\u09b0\u09c7\u099f\u09c7\u09a1 \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0\u09c7\u09b0 \u099c\u09a8\u09cd\u09af, \u09ef\u09e6\u00b0C \u0987\u09a8\u09b8\u09c1\u09b2\u09c7\u09b6\u09a8 \u09aa\u09b0\u09cd\u09af\u09be\u09aa\u09cd\u09a4 \u09ae\u09be\u09b0\u09cd\u099c\u09bf\u09a8 \u09b8\u09b0\u09ac\u09b0\u09be\u09b9 \u0995\u09b0\u09c7\u0964 \u09af\u09be\u0987\u09b9\u09cb\u0995, \u09ec\u09e6\u00b0C \u0987\u09a8\u09b8\u09c1\u09b2\u09c7\u09b6\u09a8 \u0985\u09aa\u09b0\u09cd\u09af\u09be\u09aa\u09cd\u09a4 \u09b9\u09ac\u09c7 \u098f\u09ac\u0982 \u09b8\u09ae\u09af\u09bc\u09c7\u09b0 \u0986\u0997\u09c7 \u09ac\u09cd\u09af\u09b0\u09cd\u09a5 \u09b9\u09a4\u09c7 \u09aa\u09be\u09b0\u09c7\u0964.<\/p>\n<p><strong>\u09ae\u09c2\u09b2 \u09a8\u09bf\u09af\u09bc\u09ae<\/strong>: \u09b8\u09b0\u09cd\u09ac\u09a6\u09be \u09af\u09be\u099a\u09be\u0987 \u0995\u09b0\u09c1\u09a8 \u09af\u09c7 \u0995\u09a8\u09cd\u09a1\u09be\u0995\u09cd\u099f\u09b0 \u0987\u09a8\u09b8\u09c1\u09b2\u09c7\u09b6\u09a8 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09b0\u09c7\u099f\u09bf\u0982 \u2265 \u09b8\u09b0\u09cd\u09ac\u09be\u09a7\u09bf\u0995 \u09aa\u09cd\u09b0\u09a4\u09cd\u09af\u09be\u09b6\u09bf\u09a4 \u09aa\u09b0\u09bf\u09ac\u09c7\u09b7\u09cd\u099f\u09bf\u09a4 \u0985\u09ac\u09b8\u09cd\u09a5\u09be\u09b0 \u0985\u09a7\u09c0\u09a8\u09c7 \u099f\u09be\u09b0\u09cd\u09ae\u09bf\u09a8\u09be\u09b2\u09c7\u09b0 \u09aa\u09b0\u09ae \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be\u0964 \u098f\u099f\u09bf \u0997\u09b0\u09ae \u09aa\u09b0\u09bf\u09ac\u09c7\u09b6\u09c7 \u09ac\u09be \u09ac\u09cd\u09af\u09ac\u09b9\u09be\u09b0 \u0995\u09b0\u09be\u09b0 \u09b8\u09ae\u09af\u09bc \u09ac\u09bf\u09b6\u09c7\u09b7\u09ad\u09be\u09ac\u09c7 \u0997\u09c1\u09b0\u09c1\u09a4\u09cd\u09ac\u09aa\u09c2\u09b0\u09cd\u09a3 <a href=\"https:\/\/test.viox.com\/bn\/current-limiting-circuit-breaker-guide\/\">100% \u09b0\u09c7\u099f\u09c7\u09a1 \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0<\/a>.<\/p>\n<h2>IEC \u09ac\u09a8\u09be\u09ae UL \u09b8\u09cd\u099f\u09cd\u09af\u09be\u09a8\u09cd\u09a1\u09be\u09b0\u09cd\u09a1: \u09ae\u09c2\u09b2 \u09aa\u09be\u09b0\u09cd\u09a5\u0995\u09cd\u09af<\/h2>\n<p>\u09af\u09a6\u09bf\u0993 IEC 60947-2 \u098f\u09ac\u0982 UL 489 \u098f\u09b0 \u0985\u09a8\u09c1\u09b0\u09c2\u09aa \u0989\u09a6\u09cd\u09a6\u09c7\u09b6\u09cd\u09af \u09b0\u09af\u09bc\u09c7\u099b\u09c7, \u09a4\u09ac\u09c7 \u09ac\u09c7\u09b6 \u0995\u09af\u09bc\u09c7\u0995\u099f\u09bf \u0997\u09c1\u09b0\u09c1\u09a4\u09cd\u09ac\u09aa\u09c2\u09b0\u09cd\u09a3 \u09aa\u09be\u09b0\u09cd\u09a5\u0995\u09cd\u09af \u09aa\u09a3\u09cd\u09af \u09a8\u09bf\u09b0\u09cd\u09ac\u09be\u099a\u09a8\u0995\u09c7 \u09aa\u09cd\u09b0\u09ad\u09be\u09ac\u09bf\u09a4 \u0995\u09b0\u09c7:<\/p>\n<table border=\"1\" style=\"width: 100%; border-collapse: collapse; margin-bottom: 20px;\">\n<thead>\n<tr style=\"background-color: #f2f2f2;\">\n<th style=\"padding: 8px; text-align: left;\">\u09a6\u09bf\u0995<\/th>\n<th style=\"padding: 8px; text-align: left;\">\u0986\u0987\u0987\u09b8\u09bf 60947-2<\/th>\n<th style=\"padding: 8px; text-align: left;\">\u0987\u0989\u098f\u09b2 \u09ea\u09ee\u09ef<\/th>\n<th style=\"padding: 8px; text-align: left;\">\u09aa\u09cd\u09b0\u09ad\u09be\u09ac<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding: 8px;\"><strong>\u09b0\u09c7\u09ab\u09be\u09b0\u09c7\u09a8\u09cd\u09b8 \u09aa\u09b0\u09bf\u09ac\u09c7\u09b7\u09cd\u099f\u09bf\u09a4<\/strong><\/td>\n<td style=\"padding: 8px;\">\u09ea\u09e6\u00b0C (\u09aa\u09b0\u09bf\u09ac\u09b0\u09cd\u09a4\u09a8 \u09b9\u09a4\u09c7 \u09aa\u09be\u09b0\u09c7)<\/td>\n<td style=\"padding: 8px;\">\u09ea\u09e6\u00b0C (\u09b8\u09cd\u09a5\u09bf\u09b0)<\/td>\n<td style=\"padding: 8px;\">IEC \u09aa\u09cd\u09b0\u09b8\u09cd\u09a4\u09c1\u09a4\u0995\u09be\u09b0\u0995\u09c7\u09b0 \u0998\u09cb\u09b7\u09bf\u09a4 \u09b0\u09c7\u09ab\u09be\u09b0\u09c7\u09a8\u09cd\u09b8\u09c7\u09b0 \u0985\u09a8\u09c1\u09ae\u09a4\u09bf \u09a6\u09c7\u09af\u09bc<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>\u099f\u09be\u09b0\u09cd\u09ae\u09bf\u09a8\u09be\u09b2 \u09ac\u09c3\u09a6\u09cd\u09a7\u09bf \u09b8\u09c0\u09ae\u09be<\/strong><\/td>\n<td style=\"padding: 8px;\">\u0989\u09aa\u09be\u09a6\u09be\u09a8-\u09a8\u09bf\u09b0\u09cd\u09ad\u09b0 (\u09eb\u09e6-\u09ed\u09e6\u00b0C)<\/td>\n<td style=\"padding: 8px;\">\u09b8\u09cd\u09a5\u09bf\u09b0 (\u09eb\u09e6\u00b0C \u09b8\u09cd\u099f\u09cd\u09af\u09be\u09a8\u09cd\u09a1\u09be\u09b0\u09cd\u09a1, 100% \u098f\u09b0 \u099c\u09a8\u09cd\u09af \u09ec\u09e6\u00b0C)<\/td>\n<td style=\"padding: 8px;\">IEC \u099f\u09be\u09b0\u09cd\u09ae\u09bf\u09a8\u09be\u09b2 \u09a8\u09bf\u09b0\u09cd\u09ae\u09be\u09a3\u09c7\u09b0 \u0989\u09aa\u09b0 \u09ad\u09bf\u09a4\u09cd\u09a4\u09bf \u0995\u09b0\u09c7 \u0986\u09b0\u0993 \u09a8\u09ae\u09a8\u09c0\u09af\u09bc<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>\u0998\u09c7\u09b0 \u09aa\u09b0\u09c0\u0995\u09cd\u09b7\u09be<\/strong><\/td>\n<td style=\"padding: 8px;\">\u09aa\u09cd\u09b0\u09a4\u09bf\u09a8\u09bf\u09a7\u09bf \u0998\u09c7\u09b0\u09c7 \u09aa\u09b0\u09c0\u0995\u09cd\u09b7\u09bf\u09a4<\/td>\n<td style=\"padding: 8px;\">\u09b8\u09ae\u09cd\u09ad\u09be\u09ac\u09cd\u09af \u0995\u09cd\u09b7\u09c1\u09a6\u09cd\u09b0\u09a4\u09ae \u0998\u09c7\u09b0\u09c7 \u09aa\u09b0\u09c0\u0995\u09cd\u09b7\u09bf\u09a4<\/td>\n<td style=\"padding: 8px;\">UL \u09b8\u09ae\u09cd\u09ad\u09be\u09ac\u09cd\u09af\u09ad\u09be\u09ac\u09c7 \u0986\u09b0\u0993 \u09b0\u0995\u09cd\u09b7\u09a3\u09b6\u09c0\u09b2<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>\u0985\u09ac\u09bf\u099a\u09cd\u099b\u09bf\u09a8\u09cd\u09a8 \u09b0\u09c7\u099f\u09bf\u0982<\/strong><\/td>\n<td style=\"padding: 8px;\">100% \u09a1\u09bf\u09ab\u09b2\u09cd\u099f\u09b0\u09c2\u09aa\u09c7 \u0985\u09ac\u09bf\u099a\u09cd\u099b\u09bf\u09a8\u09cd\u09a8<\/td>\n<td style=\"padding: 8px;\">80% \u0985\u09ac\u09bf\u099a\u09cd\u099b\u09bf\u09a8\u09cd\u09a8 \u09af\u09a6\u09bf \u09a8\u09be 100% \u099a\u09bf\u09b9\u09cd\u09a8\u09bf\u09a4 \u0995\u09b0\u09be \u09b9\u09af\u09bc<\/td>\n<td style=\"padding: 8px;\">IEC \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0\u0997\u09c1\u09b2\u09bf \u09b8\u09be\u09a7\u09be\u09b0\u09a3\u09a4 \u0985\u09ac\u09bf\u099a\u09cd\u099b\u09bf\u09a8\u09cd\u09a8 \u09a1\u09bf\u0989\u099f\u09bf\u09b0 \u099c\u09a8\u09cd\u09af \u0986\u09b0\u0993 \u09b6\u0995\u09cd\u09a4\u09bf\u09b6\u09be\u09b2\u09c0<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\"><strong>\u09a1\u09bf\u09b0\u09c7\u099f\u09bf\u0982 \u0997\u09be\u0987\u09a1\u09c7\u09a8\u09cd\u09b8 (Derating Guidance)<\/strong><\/td>\n<td style=\"padding: 8px;\">\u0989\u09ce\u09aa\u09be\u09a6\u09a8\u0995\u09be\u09b0\u09c0 \u0995\u09b0\u09cd\u09a4\u09c3\u0995 \u09aa\u09cd\u09b0\u09a6\u09a4\u09cd\u09a4 \u0995\u09be\u09b0\u09cd\u09ad (Manufacturer-provided curves)<\/td>\n<td style=\"padding: 8px;\">NEC \u0985\u09cd\u09af\u09be\u09aa\u09cd\u09b2\u09bf\u0995\u09c7\u09b6\u09a8 \u0997\u09be\u0987\u09a1\u09c7\u09a8\u09cd\u09b8 \u09aa\u09cd\u09b0\u09a6\u09be\u09a8 \u0995\u09b0\u09c7 (NEC provides application guidance)<\/td>\n<td style=\"padding: 8px;\">\u0989\u099a\u09cd\u099a-\u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be\u09b0 \u09aa\u09b0\u09bf\u09ac\u09c7\u09b6\u09c7\u09b0 \u099c\u09a8\u09cd\u09af \u09ac\u09bf\u09ad\u09bf\u09a8\u09cd\u09a8 \u09aa\u09a6\u09cd\u09a7\u09a4\u09bf (Different approaches to high-temperature environments)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u09ac\u09c8\u09b6\u09cd\u09ac\u09bf\u0995 \u09ac\u09be\u099c\u09be\u09b0\u09c7\u09b0 \u099c\u09a8\u09cd\u09af \u09aa\u09cd\u09af\u09be\u09a8\u09c7\u09b2 \u09aa\u09cd\u09b0\u09b8\u09cd\u09a4\u09c1\u09a4\u0995\u09be\u09b0\u0995\u09a6\u09c7\u09b0 \u099c\u09a8\u09cd\u09af, VIOX \u0989\u09ad\u09af\u09bc \u09ae\u09be\u09a8\u09a6\u09a3\u09cd\u09a1\u09c7 \u09b8\u09be\u09b0\u09cd\u099f\u09bf\u09ab\u09be\u0987\u09a1 \u09b8\u09be\u09b0\u09cd\u0995\u09bf\u099f \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0 \u09b8\u09b0\u09ac\u09b0\u09be\u09b9 \u0995\u09b0\u09c7, \u09af\u09be \u0987\u09a8\u09b8\u09cd\u099f\u09b2\u09c7\u09b6\u09a8 \u09b2\u09cb\u0995\u09c7\u09b6\u09a8 \u09a8\u09bf\u09b0\u09cd\u09ac\u09bf\u09b6\u09c7\u09b7\u09c7 \u09b8\u09ae\u09cd\u09ae\u09a4\u09bf \u09a8\u09bf\u09b6\u09cd\u099a\u09bf\u09a4 \u0995\u09b0\u09c7\u0964 \u0986\u09ae\u09be\u09a6\u09c7\u09b0 <a href=\"https:\/\/test.viox.com\/bn\/quality-assurance-in-mcb-manufacturing\/\">\u0997\u09c1\u09a3\u09ae\u09be\u09a8 \u09a8\u09bf\u09b6\u09cd\u099a\u09bf\u09a4\u0995\u09b0\u09a3 \u09aa\u09cd\u09b0\u0995\u09cd\u09b0\u09bf\u09af\u09bc\u09be (quality assurance processes)<\/a> \u09b8\u09ac\u099a\u09c7\u09af\u09bc\u09c7 \u0995\u09a0\u09cb\u09b0 \u09aa\u09cd\u09b0\u09af\u09bc\u09cb\u099c\u09a8\u09c0\u09af\u09bc\u09a4\u09be \u0985\u09a8\u09c1\u09b8\u09be\u09b0\u09c7 \u09a4\u09be\u09aa\u09c0\u09af\u09bc \u0995\u09b0\u09cd\u09ae\u0995\u09cd\u09b7\u09ae\u09a4\u09be \u09af\u09be\u099a\u09be\u0987 \u0995\u09b0\u09c7\u0964 (verify thermal performance to the most stringent requirements.).<\/p>\n<h2>\u09ac\u09cd\u09af\u09ac\u09b9\u09be\u09b0\u09bf\u0995 \u0985\u09cd\u09af\u09be\u09aa\u09cd\u09b2\u09bf\u0995\u09c7\u09b6\u09a8 \u09a8\u09bf\u09b0\u09cd\u09a6\u09c7\u09b6\u09bf\u0995\u09be<\/h2>\n<p><strong>\u09aa\u09cd\u09af\u09be\u09a8\u09c7\u09b2 \u09aa\u09cd\u09b0\u09b8\u09cd\u09a4\u09c1\u09a4\u0995\u09be\u09b0\u0995\u09a6\u09c7\u09b0 \u099c\u09a8\u09cd\u09af (For Panel Builders)<\/strong>:<\/p>\n<ol>\n<li>\u09b8\u09b0\u09cd\u09ac\u09a6\u09be \u09af\u09be\u099a\u09be\u0987 \u0995\u09b0\u09c1\u09a8 \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0\u09c7\u09b0 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09b0\u09c7\u099f\u09bf\u0982 \u0986\u09aa\u09a8\u09be\u09b0 \u0985\u09cd\u09af\u09be\u09aa\u09cd\u09b2\u09bf\u0995\u09c7\u09b6\u09a8 \u09aa\u09b0\u09bf\u09ac\u09c7\u09b6\u09c7\u09b0 \u09b8\u09be\u09a5\u09c7 \u09ae\u09c7\u09b2\u09c7 \u0995\u09bf\u09a8\u09be (Always verify breaker temperature ratings match your application environment)<\/li>\n<li>\u098f\u09a8\u0995\u09cd\u09b2\u09cb\u099c\u09be\u09b0 \u09b9\u09bf\u099f\u09bf\u0982 \u09aa\u09cd\u09b0\u09ad\u09be\u09ac\u09c7\u09b0 \u099c\u09a8\u09cd\u09af \u09b9\u09bf\u09b8\u09be\u09ac \u0995\u09b0\u09c1\u09a8\u2014\u0985\u09ad\u09cd\u09af\u09a8\u09cd\u09a4\u09b0\u09c0\u09a3 \u09aa\u09b0\u09bf\u09ac\u09c7\u09b7\u09cd\u099f\u09bf\u09a4 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u0998\u09b0\u09c7\u09b0 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be\u09b0 \u099a\u09c7\u09af\u09bc\u09c7 10-20\u00b0C \u09ac\u09c7\u09b6\u09bf \u09b9\u09a4\u09c7 \u09aa\u09be\u09b0\u09c7 (Account for enclosure heating effects\u2014interior ambient can be 10-20\u00b0C above room temperature)<\/li>\n<li>\u0995\u09ae\u09bf\u09b6\u09a8\u09bf\u0982\u09af\u09bc\u09c7\u09b0 \u09b8\u09ae\u09af\u09bc \u09ac\u09c7\u09b8\u09b2\u09be\u0987\u09a8 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09aa\u09cd\u09b0\u09a4\u09bf\u09b7\u09cd\u09a0\u09be\u09b0 \u099c\u09a8\u09cd\u09af \u09a5\u09be\u09b0\u09cd\u09ae\u09be\u09b2 \u0987\u09ae\u09c7\u099c\u09bf\u0982 \u09ac\u09cd\u09af\u09ac\u09b9\u09be\u09b0 \u0995\u09b0\u09c1\u09a8 (Use thermal imaging during commissioning to establish baseline temperatures)<\/li>\n<li>\u09aa\u09cd\u09b0\u09a4\u09bf\u09b0\u09cb\u09a7\u09ae\u09c2\u09b2\u0995 \u09b0\u0995\u09cd\u09b7\u09a3\u09be\u09ac\u09c7\u0995\u09cd\u09b7\u09a3 \u09aa\u09cd\u09b0\u09cb\u0997\u09cd\u09b0\u09be\u09ae\u09c7\u09b0 \u0985\u0982\u09b6 \u09b9\u09bf\u09b8\u09be\u09ac\u09c7 \u09aa\u09b0\u09cd\u09af\u09be\u09af\u09bc\u0995\u09cd\u09b0\u09ae\u09bf\u0995 IR \u09b8\u09cd\u0995\u09cd\u09af\u09be\u09a8\u09bf\u0982 \u09ac\u09be\u09b8\u09cd\u09a4\u09ac\u09be\u09af\u09bc\u09a8 \u0995\u09b0\u09c1\u09a8 (Implement periodic IR scanning as part of preventive maintenance programs)<\/li>\n<li>\u09aa\u09cd\u09b0\u09ac\u09a3\u09a4\u09be \u09ac\u09bf\u09b6\u09cd\u09b2\u09c7\u09b7\u09a3\u09c7\u09b0 \u099c\u09a8\u09cd\u09af \u09b8\u09ae\u09b8\u09cd\u09a4 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09b0\u09bf\u09a1\u09bf\u0982 \u09a8\u09a5\u09bf\u09ad\u09c1\u0995\u09cd\u09a4 \u0995\u09b0\u09c1\u09a8 (Document all temperature readings for trend analysis)<\/li>\n<\/ol>\n<p><strong>\u09b8\u09c1\u09ac\u09bf\u09a7\u09be \u09ac\u09cd\u09af\u09ac\u09b8\u09cd\u09a5\u09be\u09aa\u0995\u09a6\u09c7\u09b0 \u099c\u09a8\u09cd\u09af<\/strong>:<\/p>\n<ol>\n<li>\u0997\u09c1\u09b0\u09c1\u09a4\u09cd\u09ac\u09aa\u09c2\u09b0\u09cd\u09a3 \u09ac\u09c8\u09a6\u09cd\u09af\u09c1\u09a4\u09bf\u0995 \u09ac\u09bf\u09a4\u09b0\u09a3 \u09b8\u09b0\u099e\u09cd\u099c\u09be\u09ae\u09c7\u09b0 \u09ac\u09be\u09b0\u09cd\u09b7\u09bf\u0995 \u09a4\u09be\u09aa\u09c0\u09af\u09bc \u09b8\u09ae\u09c0\u0995\u09cd\u09b7\u09be\u09b0 \u09b8\u09ae\u09af\u09bc\u09b8\u09c2\u099a\u09c0 \u0995\u09b0\u09c1\u09a8 (Schedule annual thermal surveys of critical electrical distribution equipment)<\/li>\n<li>\u0985\u09b8\u09cd\u09ac\u09be\u09ad\u09be\u09ac\u09bf\u0995 \u09a4\u09be\u09aa\u09c0\u09af\u09bc \u09aa\u09cd\u09af\u09be\u099f\u09be\u09b0\u09cd\u09a8 \u09b8\u09a8\u09be\u0995\u09cd\u09a4 \u0995\u09b0\u09a4\u09c7 \u09b0\u0995\u09cd\u09b7\u09a3\u09be\u09ac\u09c7\u0995\u09cd\u09b7\u09a3 \u0995\u09b0\u09cd\u09ae\u09c0\u09a6\u09c7\u09b0 \u09aa\u09cd\u09b0\u09b6\u09bf\u0995\u09cd\u09b7\u09a3 \u09a6\u09bf\u09a8 (Train maintenance personnel to recognize abnormal thermal patterns)<\/li>\n<li>\u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be\u09b0 \u09a5\u09cd\u09b0\u09c7\u09b6\u09b9\u09cb\u09b2\u09cd\u09a1 \u09b8\u09cd\u09a5\u09be\u09aa\u09a8 \u0995\u09b0\u09c1\u09a8 \u09af\u09be \u09a4\u09a6\u09a8\u09cd\u09a4 \u09b6\u09c1\u09b0\u09c1 \u0995\u09b0\u09c7 (\u09b8\u09be\u09a7\u09be\u09b0\u09a3\u09a4 \u0394T &gt; 20\u00b0C) (Establish temperature thresholds that trigger investigation (typically \u0394T &gt; 20\u00b0C))<\/li>\n<li>\u0985\u09ac\u0995\u09cd\u09b7\u09af\u09bc \u09aa\u09cd\u09b0\u09ac\u09a3\u09a4\u09be \u09b8\u09a8\u09be\u0995\u09cd\u09a4 \u0995\u09b0\u09a4\u09c7 IR \u09b8\u09cd\u0995\u09cd\u09af\u09be\u09a8\u09c7\u09b0 \u09b0\u09c7\u0995\u09b0\u09cd\u09a1 \u09b0\u09be\u0996\u09c1\u09a8 (Maintain records of IR scans to identify degradation trends)<\/li>\n<li>\u09a4\u09be\u09aa\u09c0\u09af\u09bc \u0985\u09ac\u0995\u09cd\u09b7\u09af\u09bc \u09a6\u09c7\u0996\u09be\u099a\u09cd\u099b\u09c7 \u098f\u09ae\u09a8 \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0\u0997\u09c1\u09b2\u09bf\u09b0 \u09b8\u0995\u09cd\u09b0\u09bf\u09af\u09bc \u09aa\u09cd\u09b0\u09a4\u09bf\u09b8\u09cd\u09a5\u09be\u09aa\u09a8\u09c7\u09b0 \u099c\u09a8\u09cd\u09af \u09ac\u09be\u099c\u09c7\u099f \u0995\u09b0\u09c1\u09a8 (Budget for proactive replacement of breakers showing thermal degradation)<\/li>\n<\/ol>\n<p><strong>\u09ac\u09c8\u09a6\u09cd\u09af\u09c1\u09a4\u09bf\u0995 \u09a0\u09bf\u0995\u09be\u09a6\u09be\u09b0\u09a6\u09c7\u09b0 \u099c\u09a8\u09cd\u09af (For Electrical Contractors)<\/strong>:<\/p>\n<ol>\n<li>\u0987\u09a8\u09b8\u09cd\u099f\u09b2\u09c7\u09b6\u09a8\u09c7\u09b0 \u09b8\u09ae\u09af\u09bc \u099f\u09be\u09b0\u09cd\u09ae\u09bf\u09a8\u09be\u09b2 \u099f\u09b0\u09cd\u0995 \u09b8\u09cd\u09aa\u09c7\u09b8\u09bf\u09ab\u09bf\u0995\u09c7\u09b6\u09a8 \u09af\u09be\u099a\u09be\u0987 \u0995\u09b0\u09c1\u09a8\u2014\u09a2\u09bf\u09b2\u09c7 \u09b8\u0982\u09af\u09cb\u0997\u0997\u09c1\u09b2\u09bf \u0989\u09a4\u09cd\u09a4\u09aa\u09cd\u09a4 \u099f\u09be\u09b0\u09cd\u09ae\u09bf\u09a8\u09be\u09b2\u09c7\u09b0 \u09aa\u09cd\u09b0\u09a7\u09be\u09a8 \u0995\u09be\u09b0\u09a3 (Verify terminal torque specifications during installation\u2014loose connections are the main cause of hot terminals)<\/li>\n<li>\u0989\u099a\u09cd\u099a-\u09aa\u09cd\u09b0\u09a4\u09bf\u09b0\u09cb\u09a7\u09c7\u09b0 \u09b8\u0982\u09af\u09cb\u0997 \u09b0\u09cb\u09a7 \u0995\u09b0\u09a4\u09c7 \u0985\u09cd\u09af\u09be\u09b2\u09c1\u09ae\u09bf\u09a8\u09bf\u09af\u09bc\u09be\u09ae \u0995\u09a8\u09cd\u09a1\u09be\u0995\u099f\u09b0\u09c7\u09b0 \u0989\u09aa\u09b0 \u0985\u09cd\u09af\u09be\u09a8\u09cd\u099f\u09bf-\u0985\u0995\u09cd\u09b8\u09bf\u09a1\u09c7\u09a8\u09cd\u099f \u09af\u09cc\u0997 \u09ac\u09cd\u09af\u09ac\u09b9\u09be\u09b0 \u0995\u09b0\u09c1\u09a8 (Use anti-oxidant compound on aluminum conductors to prevent high-resistance joints)<\/li>\n<li>\u09a4\u09be\u09aa \u0985\u09aa\u099a\u09af\u09bc \u09aa\u09cd\u09b0\u099a\u09be\u09b0\u09c7\u09b0 \u099c\u09a8\u09cd\u09af \u09aa\u09cd\u09af\u09be\u09a8\u09c7\u09b2\u09c7 \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0\u0997\u09c1\u09b2\u09bf\u09b0 \u09ae\u09a7\u09cd\u09af\u09c7 \u09aa\u09b0\u09cd\u09af\u09be\u09aa\u09cd\u09a4 \u09b8\u09cd\u09a5\u09be\u09a8 \u09a6\u09bf\u09a8 (Allow adequate spacing between breakers in panels to promote heat dissipation)<\/li>\n<li>Consider <a href=\"https:\/\/test.viox.com\/bn\/mcb-ambient-temperature-ratings-and-derating-factors\/\">\u09aa\u09b0\u09bf\u09ac\u09c7\u09b7\u09cd\u099f\u09bf\u09a4 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09a1\u09bf\u09b0\u09c7\u099f\u09bf\u0982 (ambient temperature derating)<\/a> \u0997\u09b0\u09ae \u09aa\u09b0\u09bf\u09ac\u09c7\u09b6\u09c7 (in hot environments)<\/li>\n<li>\u09ad\u09ac\u09bf\u09b7\u09cd\u09af\u09a4\u09c7\u09b0 \u09b0\u09c7\u09ab\u09be\u09b0\u09c7\u09a8\u09cd\u09b8\u09c7\u09b0 \u099c\u09a8\u09cd\u09af \u0987\u09a8\u09b8\u09cd\u099f\u09b2\u09c7\u09b6\u09a8 \u09b6\u09b0\u09cd\u09a4\u09be\u09ac\u09b2\u09c0 \u09a8\u09a5\u09bf\u09ad\u09c1\u0995\u09cd\u09a4 \u0995\u09b0\u09c1\u09a8 (Document installation conditions for future reference)<\/li>\n<\/ol>\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: \u09b8\u09be\u09b0\u09cd\u0995\u09bf\u099f \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0\u09c7\u09b0 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09ac\u09c3\u09a6\u09cd\u09a7\u09bf (FAQ: Circuit Breaker Temperature Rise)<\/h2>\n<h3>\u09aa\u09cd\u09b0\u09b6\u09cd\u09a8: \u09b8\u09be\u09b0\u09cd\u0995\u09bf\u099f \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0 \u099f\u09be\u09b0\u09cd\u09ae\u09bf\u09a8\u09be\u09b2\u09c7\u09b0 \u099c\u09a8\u09cd\u09af \u09b8\u09b0\u09cd\u09ac\u09cb\u099a\u09cd\u099a \u09a8\u09bf\u09b0\u09be\u09aa\u09a6 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u0995\u09a4? (Q: What is the maximum safe temperature for a circuit breaker terminal?)<\/h3>\n<p>\u0989\u09a4\u09cd\u09a4\u09b0: UL 489 \u0985\u09a8\u09c1\u09af\u09be\u09af\u09bc\u09c0 \u09b8\u09cd\u099f\u09cd\u09af\u09be\u09a8\u09cd\u09a1\u09be\u09b0\u09cd\u09a1-\u09b0\u09c7\u099f\u09c7\u09a1 \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0\u09c7\u09b0 \u099c\u09a8\u09cd\u09af, \u099f\u09be\u09b0\u09cd\u09ae\u09bf\u09a8\u09be\u09b2\u0997\u09c1\u09b2\u09bf 90\u00b0C \u09aa\u09b0\u09ae \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be (40\u00b0C \u09aa\u09b0\u09bf\u09ac\u09c7\u09b7\u09cd\u099f\u09bf\u09a4 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be\u09b0 \u0989\u09aa\u09b0\u09c7 50\u00b0C \u09ac\u09c3\u09a6\u09cd\u09a7\u09bf) \u0985\u09a4\u09bf\u0995\u09cd\u09b0\u09ae \u0995\u09b0\u09be \u0989\u099a\u09bf\u09a4 \u09a8\u09af\u09bc\u0964 100% \u09b0\u09c7\u099f\u09c7\u09a1 \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0\u09c7\u09b0 \u099c\u09a8\u09cd\u09af, \u09b8\u09c0\u09ae\u09be \u09b9\u09b2 100\u00b0C \u09aa\u09b0\u09ae (60\u00b0C \u09ac\u09c3\u09a6\u09cd\u09a7\u09bf)\u0964 IEC 60947-2 \u098f\u09b0 \u0985\u09a8\u09c1\u09b0\u09c2\u09aa \u09b8\u09c0\u09ae\u09be \u09b0\u09af\u09bc\u09c7\u099b\u09c7 \u09a4\u09ac\u09c7 \u099f\u09be\u09b0\u09cd\u09ae\u09bf\u09a8\u09be\u09b2 \u0989\u09aa\u09be\u09a6\u09be\u09a8 \u098f\u09ac\u0982 \u09a8\u09bf\u09b0\u09cd\u09ae\u09be\u09a3\u09c7\u09b0 \u0989\u09aa\u09b0 \u09ad\u09bf\u09a4\u09cd\u09a4\u09bf \u0995\u09b0\u09c7 \u09aa\u09b0\u09bf\u09ac\u09b0\u09cd\u09a4\u09bf\u09a4 \u09b9\u09a4\u09c7 \u09aa\u09be\u09b0\u09c7\u0964 \u09b8\u09b0\u09cd\u09ac\u09a6\u09be \u09a8\u09bf\u09b0\u09cd\u09a6\u09bf\u09b7\u09cd\u099f \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0\u09c7\u09b0 \u09a1\u09c7\u099f\u09be\u09b6\u09c0\u099f \u09af\u09be\u099a\u09be\u0987 \u0995\u09b0\u09c1\u09a8\u0964 (A: For standard-rated breakers per UL 489, terminals should not exceed 90\u00b0C absolute temperature (50\u00b0C rise above 40\u00b0C ambient). For 100% rated breakers, the limit is 100\u00b0C absolute (60\u00b0C rise). IEC 60947-2 has similar limits but may vary based on terminal material and construction. Always verify the specific breaker\u2019s datasheet.).<\/p>\n<h3>\u09aa\u09cd\u09b0\u09b6\u09cd\u09a8: \u0986\u09ae\u09bf \u0995\u09bf\u09ad\u09be\u09ac\u09c7 \u099c\u09be\u09a8\u09ac \u09af\u09c7 \u0986\u09ae\u09be\u09b0 \u09b8\u09be\u09b0\u09cd\u0995\u09bf\u099f \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0 \u0996\u09c1\u09ac \u0997\u09b0\u09ae \u099a\u09b2\u099b\u09c7? (Q: How do I know if my circuit breaker is running too hot?)<\/h3>\n<p>\u0989\u09a4\u09cd\u09a4\u09b0: \u09aa\u09b0\u09bf\u09ac\u09c7\u09b7\u09cd\u099f\u09bf\u09a4 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be\u09b0 \u0989\u09aa\u09b0\u09c7 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09ac\u09c3\u09a6\u09cd\u09a7\u09bf \u09aa\u09b0\u09bf\u09ae\u09be\u09aa \u0995\u09b0\u09a4\u09c7 \u0987\u09a8\u09ab\u09cd\u09b0\u09be\u09b0\u09c7\u09a1 \u09a5\u09be\u09b0\u09cd\u09ae\u09cb\u0997\u09cd\u09b0\u09be\u09ab\u09bf \u09ac\u09cd\u09af\u09ac\u09b9\u09be\u09b0 \u0995\u09b0\u09c1\u09a8\u0964 \u09af\u09a6\u09bf \u0394T 30\u00b0C \u0985\u09a4\u09bf\u0995\u09cd\u09b0\u09ae \u0995\u09b0\u09c7, \u0985\u09ac\u09bf\u09b2\u09ae\u09cd\u09ac\u09c7 \u09a4\u09a6\u09a8\u09cd\u09a4 \u0995\u09b0\u09c1\u09a8\u0964 \u09b6\u09be\u09b0\u09c0\u09b0\u09bf\u0995 \u09b2\u0995\u09cd\u09b7\u09a3\u0997\u09c1\u09b2\u09bf\u09b0 \u09ae\u09a7\u09cd\u09af\u09c7 \u099f\u09be\u09b0\u09cd\u09ae\u09bf\u09a8\u09be\u09b2\u09c7\u09b0 \u0995\u09be\u099b\u09be\u0995\u09be\u099b\u09bf \u09ac\u09bf\u09ac\u09b0\u09cd\u09a3 \u0987\u09a8\u09b8\u09c1\u09b2\u09c7\u09b6\u09a8, \u09aa\u09cb\u09a1\u09bc\u09be \u0997\u09a8\u09cd\u09a7 \u09ac\u09be (A: Use infrared thermography to measure the temperature rise above ambient. If \u0394T exceeds 30\u00b0C, investigate immediately. Physical signs include discolored insulation near terminals, a burning smell, or) <a href=\"https:\/\/test.viox.com\/bn\/circuit-breaker-buzzing-diagnostic-guide\/\">\u0997\u09c1\u099e\u09cd\u099c\u09a8\/\u0997\u09c1\u09a8\u0997\u09c1\u09a8 \u09b6\u09ac\u09cd\u09a6 (buzzing\/humming sounds)<\/a>. \u0964 \u09af\u09a6\u09bf \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0 \u09b9\u09cd\u09af\u09be\u09a8\u09cd\u09a1\u09c7\u09b2\u099f\u09bf \u09b8\u09cd\u09aa\u09b0\u09cd\u09b6 \u0995\u09b0\u09a4\u09c7 \u0985\u09b8\u09cd\u09ac\u09b8\u09cd\u09a4\u09bf\u0995\u09b0\u09ad\u09be\u09ac\u09c7 \u0997\u09b0\u09ae \u09b9\u09af\u09bc (\u09a7\u09be\u09a4\u09c1\u09b0 \u099c\u09a8\u09cd\u09af &gt;60\u00b0C, \u09aa\u09cd\u09b2\u09be\u09b8\u09cd\u099f\u09bf\u0995\u09c7\u09b0 \u099c\u09a8\u09cd\u09af &gt;85\u00b0C), \u09a4\u09ac\u09c7 \u098f\u099f\u09bf \u09b8\u09cd\u09ac\u09be\u09ad\u09be\u09ac\u09bf\u0995 \u09aa\u09cd\u09af\u09be\u09b0\u09be\u09ae\u09bf\u099f\u09be\u09b0\u09c7\u09b0 \u09ac\u09be\u0987\u09b0\u09c7 \u0995\u09be\u099c \u0995\u09b0\u09a4\u09c7 \u09aa\u09be\u09b0\u09c7\u0964 (. If the breaker handle is uncomfortably hot to touch (&gt;60\u00b0C for metal, &gt;85\u00b0C for plastic), it may be operating outside normal parameters.).<\/p>\n<h3>\u09aa\u09cd\u09b0\u09b6\u09cd\u09a8: \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09ac\u09c3\u09a6\u09cd\u09a7\u09bf \u098f\u09ac\u0982 \u09aa\u09b0\u09ae \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be\u09b0 \u09ae\u09a7\u09cd\u09af\u09c7 \u09aa\u09be\u09b0\u09cd\u09a5\u0995\u09cd\u09af \u0995\u09c0? (Q: What\u2019s the difference between temperature rise and absolute temperature?)<\/h3>\n<p>\u0989\u09a4\u09cd\u09a4\u09b0: \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09ac\u09c3\u09a6\u09cd\u09a7\u09bf (\u0394T) \u09b9\u09b2 \u09aa\u09b0\u09bf\u09ac\u09c7\u09b7\u09cd\u099f\u09bf\u09a4 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be\u09b0 \u0989\u09aa\u09b0\u09c7 \u09ac\u09c3\u09a6\u09cd\u09a7\u09bf, \u09af\u09c7\u0996\u09be\u09a8\u09c7 \u09aa\u09b0\u09ae \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09b9\u09b2 \u09aa\u09cd\u09b0\u0995\u09c3\u09a4 \u09aa\u09b0\u09bf\u09ae\u09be\u09aa \u0995\u09b0\u09be \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be\u0964 \u0989\u09a6\u09be\u09b9\u09b0\u09a3\u09b8\u09cd\u09ac\u09b0\u09c2\u09aa, 40\u00b0C \u09aa\u09b0\u09bf\u09ac\u09c7\u09b7\u09cd\u099f\u09bf\u09a4 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be\u09af\u09bc 85\u00b0C \u098f \u098f\u0995\u099f\u09bf \u099f\u09be\u09b0\u09cd\u09ae\u09bf\u09a8\u09be\u09b2\u09c7\u09b0 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09ac\u09c3\u09a6\u09cd\u09a7\u09bf 45\u00b0C\u0964 \u09b8\u09cd\u099f\u09cd\u09af\u09be\u09a8\u09cd\u09a1\u09be\u09b0\u09cd\u09a1\u0997\u09c1\u09b2\u09bf \u09ac\u09c3\u09a6\u09cd\u09a7\u09bf\u09b0 \u09b8\u09c0\u09ae\u09be \u09a8\u09bf\u09b0\u09cd\u09a6\u09bf\u09b7\u09cd\u099f \u0995\u09b0\u09c7 \u0995\u09be\u09b0\u09a3 \u09aa\u09b0\u09bf\u09ac\u09c7\u09b7\u09cd\u099f\u09bf\u09a4 \u0985\u09ac\u09b8\u09cd\u09a5\u09be \u09aa\u09b0\u09bf\u09ac\u09b0\u09cd\u09a4\u09bf\u09a4 \u09b9\u09af\u09bc, \u09a4\u09ac\u09c7 \u09aa\u09b0\u09ae \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u0987\u09a8\u09b8\u09c1\u09b2\u09c7\u09b6\u09a8 \u09b8\u09be\u09ae\u099e\u09cd\u099c\u09b8\u09cd\u09af \u09a8\u09bf\u09b0\u09cd\u09a7\u09be\u09b0\u09a3 \u0995\u09b0\u09c7\u0964 (A: Temperature rise (\u0394T) is the increase above ambient temperature, while absolute temperature is the actual measured temperature. For example, a terminal at 85\u00b0C in a 40\u00b0C ambient has a 45\u00b0C temperature rise. Standards specify rise limits because ambient conditions vary, but absolute temperature determines insulation compatibility.).<\/p>\n<h3>\u09aa\u09cd\u09b0\u09b6\u09cd\u09a8: \u0986\u09ae\u09bf \u0995\u09bf \u09b8\u09be\u09b0\u09cd\u0995\u09bf\u099f \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0 \u099f\u09be\u09b0\u09cd\u09ae\u09bf\u09a8\u09be\u09b2\u09c7 60\u00b0C \u09b0\u09c7\u099f\u09af\u09c1\u0995\u09cd\u09a4 \u09a4\u09be\u09b0 \u09ac\u09cd\u09af\u09ac\u09b9\u09be\u09b0 \u0995\u09b0\u09a4\u09c7 \u09aa\u09be\u09b0\u09bf? (Q: Can I use a 60\u00b0C rated wire on a circuit breaker terminal?)<\/h3>\n<p>\u0989\u09a4\u09cd\u09a4\u09b0: \u09b8\u09be\u09a7\u09be\u09b0\u09a3\u09a4 \u09a8\u09be, \u09af\u09a6\u09bf \u09a8\u09be \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0\u099f\u09bf \u09ac\u09bf\u09b6\u09c7\u09b7\u09ad\u09be\u09ac\u09c7 60\u00b0C \u099f\u09be\u09b0\u09cd\u09ae\u09bf\u09a8\u09c7\u09b6\u09a8\u09c7\u09b0 \u099c\u09a8\u09cd\u09af \u09b0\u09c7\u099f \u0995\u09b0\u09be \u09b9\u09af\u09bc \u098f\u09ac\u0982 \u098f\u0995\u099f\u09bf \u09a8\u09bf\u09af\u09bc\u09a8\u09cd\u09a4\u09cd\u09b0\u09bf\u09a4 \u09aa\u09b0\u09bf\u09ac\u09c7\u09b6\u09c7 \u0995\u09be\u099c \u0995\u09b0\u09c7\u0964 \u09ac\u09c7\u09b6\u09bf\u09b0\u09ad\u09be\u0997 \u0986\u09a7\u09c1\u09a8\u09bf\u0995 \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0 75\u00b0C \u09a8\u09cd\u09af\u09c2\u09a8\u09a4\u09ae \u0995\u09a8\u09cd\u09a1\u09be\u0995\u09cd\u099f\u09b0 \u0987\u09a8\u09b8\u09c1\u09b2\u09c7\u09b6\u09a8 \u09a7\u09b0\u09c7 \u09a8\u09c7\u09af\u09bc\u0964 40\u00b0C \u09aa\u09b0\u09bf\u09ac\u09c7\u09b7\u09cd\u099f\u09bf\u09a4 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be\u09af\u09bc 50\u00b0C \u099f\u09be\u09b0\u09cd\u09ae\u09bf\u09a8\u09be\u09b2 \u09ac\u09c3\u09a6\u09cd\u09a7\u09bf \u09b8\u09b9, \u0986\u09aa\u09a8\u09bf 90\u00b0C \u09aa\u09b0\u09ae \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be\u09af\u09bc \u09aa\u09cc\u0981\u099b\u09be\u09ac\u09c7\u09a8\u2014\u09af\u09be 60\u00b0C \u0987\u09a8\u09b8\u09c1\u09b2\u09c7\u09b6\u09a8 \u09b8\u09c0\u09ae\u09be\u09b0 \u0989\u09aa\u09b0\u09c7\u0964 \u09b8\u09b0\u09cd\u09ac\u09a6\u09be \u099f\u09be\u09b0\u09cd\u09ae\u09bf\u09a8\u09be\u09b2 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09b0\u09c7\u099f\u09bf\u0982\u09af\u09bc\u09c7\u09b0 \u09b8\u09be\u09a5\u09c7 \u09ae\u09bf\u09b2 \u0995\u09b0\u09c1\u09a8 \u09ac\u09be \u0985\u09a4\u09bf\u0995\u09cd\u09b0\u09ae \u0995\u09b0\u09c1\u09a8\u0964 (A: Generally no, unless the breaker is specifically rated for 60\u00b0C terminations and operates in a controlled environment. Most modern breakers assume 75\u00b0C minimum conductor insulation. With a 50\u00b0C terminal rise at 40\u00b0C ambient, you\u2019d reach 90\u00b0C absolute\u2014well above 60\u00b0C insulation limits. Always match or exceed the terminal temperature rating.).<\/p>\n<h3>\u09aa\u09cd\u09b0\u09b6\u09cd\u09a8: \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0\u09c7 IR \u09b0\u09bf\u09a1\u09bf\u0982 \u09a8\u09c7\u0993\u09af\u09bc\u09be\u09b0 \u0986\u0997\u09c7 \u0986\u09ae\u09be\u09b0 \u0995\u09a4\u0995\u09cd\u09b7\u09a3 \u0985\u09aa\u09c7\u0995\u09cd\u09b7\u09be \u0995\u09b0\u09be \u0989\u099a\u09bf\u09a4? (Q: How long should I wait before taking IR readings on a breaker?)<\/h3>\n<p>\u0989\u09a4\u09cd\u09a4\u09b0: \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0\u0995\u09c7 \u09a4\u09be\u09aa\u09c0\u09af\u09bc \u09b8\u09be\u09ae\u09cd\u09af\u09be\u09ac\u09b8\u09cd\u09a5\u09be\u09af\u09bc \u09aa\u09cc\u0981\u099b\u09be\u09a8\u09cb\u09b0 \u099c\u09a8\u09cd\u09af \u0985\u09ac\u09bf\u099a\u09b2\u09bf\u09a4 \u09b2\u09cb\u09a1\u09c7 \u09a8\u09cd\u09af\u09c2\u09a8\u09a4\u09ae 3 \u0998\u09a8\u09cd\u099f\u09be \u098f\u0995\u099f\u09be\u09a8\u09be \u0985\u09aa\u09be\u09b0\u09c7\u09b6\u09a8\u09c7\u09b0 \u0985\u09a8\u09c1\u09ae\u09a4\u09bf \u09a6\u09bf\u09a8\u0964 \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0 \u098f\u09ac\u0982 \u0986\u09b6\u09c7\u09aa\u09be\u09b6\u09c7\u09b0 \u0998\u09c7\u09b0\u09c7\u09b0 \u09ae\u09a7\u09cd\u09af\u09c7 \u09a4\u09be\u09aa\u09c0\u09af\u09bc \u09ad\u09b0 \u09b8\u09cd\u09a5\u09bf\u09a4\u09bf\u09b6\u09c0\u09b2 \u09b9\u09a4\u09c7 \u09b8\u09ae\u09af\u09bc \u09a8\u09c7\u09af\u09bc\u0964 \u09b8\u09ae\u09be\u09b2\u09cb\u099a\u09a8\u09be\u09ae\u09c2\u09b2\u0995 \u09aa\u09b0\u09bf\u09ae\u09be\u09aa\u09c7\u09b0 \u099c\u09a8\u09cd\u09af, 4-6 \u0998\u09a8\u09cd\u099f\u09be \u09aa\u099b\u09a8\u09cd\u09a6\u09a8\u09c0\u09af\u09bc\u0964 \u0996\u09c1\u09ac \u09a4\u09be\u09a1\u09bc\u09be\u09a4\u09be\u09a1\u09bc\u09bf \u09b0\u09bf\u09a1\u09bf\u0982 \u09a8\u09bf\u09b2\u09c7 \u09aa\u09cd\u09b0\u0995\u09c3\u09a4 \u0985\u09aa\u09be\u09b0\u09c7\u099f\u09bf\u0982 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u0995\u09ae \u09b9\u09ac\u09c7\u0964 (A: Allow minimum 3 hours of continuous operation at steady load for the breaker to reach thermal equilibrium. Thermal mass in the breaker and surrounding enclosure takes time to stabilize. For critical measurements, 4-6 hours is preferable. Taking readings too early will underestimate actual operating temperatures.).<\/p>\n<h3>\u09aa\u09cd\u09b0\u09b6\u09cd\u09a8: UL 489 100% \u09b0\u09c7\u099f\u09c7\u09a1 \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0 \u09b8\u09ae\u09cd\u09aa\u09b0\u09cd\u0995\u09c7 \u0995\u09c0 \u09ac\u09b2\u09c7? (Q: What does UL 489 say about 100% rated breakers?)<\/h3>\n<p>\u0989\u09a4\u09cd\u09a4\u09b0: UL 489 \u0985\u09a8\u09c1\u099a\u09cd\u099b\u09c7\u09a6 7.1.4.3.3 100% \u09b0\u09c7\u099f\u09c7\u09a1 \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0\u0997\u09c1\u09b2\u09bf\u0995\u09c7 60\u00b0C \u09aa\u09b0\u09cd\u09af\u09a8\u09cd\u09a4 \u099f\u09be\u09b0\u09cd\u09ae\u09bf\u09a8\u09be\u09b2 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09ac\u09c3\u09a6\u09cd\u09a7\u09bf\u09b0 \u0985\u09a8\u09c1\u09ae\u09a4\u09bf \u09a6\u09c7\u09af\u09bc (\u09b8\u09cd\u099f\u09cd\u09af\u09be\u09a8\u09cd\u09a1\u09be\u09b0\u09cd\u09a1 \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0\u09c7\u09b0 \u099c\u09a8\u09cd\u09af 50\u00b0C \u098f\u09b0 \u09ac\u09bf\u09aa\u09b0\u09c0\u09a4\u09c7), \u09af\u09be\u09b0 \u09ab\u09b2\u09c7 40\u00b0C \u09aa\u09b0\u09bf\u09ac\u09c7\u09b7\u09cd\u099f\u09bf\u09a4 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be\u09af\u09bc 100\u00b0C \u09aa\u09b0\u09ae \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09b9\u09af\u09bc\u0964 \u098f\u0987 \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0\u0997\u09c1\u09b2\u09bf\u0995\u09c7 \u09ac\u09bf\u09b6\u09c7\u09b7\u09ad\u09be\u09ac\u09c7 \u201c100% \u09b0\u09c7\u099f\u09bf\u0982-\u098f \u0995\u09cd\u09b0\u09ae\u09be\u0997\u09a4 \u0985\u09aa\u09be\u09b0\u09c7\u09b6\u09a8\u09c7\u09b0 \u099c\u09a8\u09cd\u09af \u0989\u09aa\u09af\u09c1\u0995\u09cd\u09a4\u201d \u09b9\u09bf\u09b8\u09be\u09ac\u09c7 \u099a\u09bf\u09b9\u09cd\u09a8\u09bf\u09a4 \u0995\u09b0\u09a4\u09c7 \u09b9\u09ac\u09c7 \u098f\u09ac\u0982 \u09b8\u09be\u09a7\u09be\u09b0\u09a3\u09a4 \u0989\u09a8\u09cd\u09a8\u09a4 \u099f\u09be\u09b0\u09cd\u09ae\u09bf\u09a8\u09be\u09b2 \u09a1\u09bf\u099c\u09be\u0987\u09a8 \u098f\u09ac\u0982 \u09a4\u09be\u09aa \u0985\u09aa\u099a\u09af\u09bc \u09ac\u09c8\u09b6\u09bf\u09b7\u09cd\u099f\u09cd\u09af\u09af\u09c1\u0995\u09cd\u09a4\u0964 (A: UL 489 Paragraph 7.1.4.3.3 allows 100% -rated breakers to have terminal temperature rise up to 60\u00b0C (vs. 50\u00b0C for standard breakers), resulting in 100\u00b0C absolute temperature at 40\u00b0C ambient. These breakers must be specifically marked \u201cSuitable for Continuous Operation at 100% of Rating\u201d and typically feature enhanced terminal designs and heat dissipation.).<\/p>\n<h2>\u0995\u09c0 Takeaways<\/h2>\n<ul>\n<li><strong>\u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09ac\u09c3\u09a6\u09cd\u09a7\u09bf\u09b0 \u09b8\u09c0\u09ae\u09be \u09a8\u09bf\u09b0\u09be\u09aa\u09a4\u09cd\u09a4\u09be-\u09b8\u09ae\u09be\u09b2\u09cb\u099a\u09a8\u09be\u09ae\u09c2\u09b2\u0995 (Temperature rise limits are safety-critical)<\/strong>: UL 489 \u098f\u09ac\u0982 IEC 60947-2 \u09b8\u09be\u09b0\u09cd\u0995\u09bf\u099f \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0\u09c7 \u0987\u09a8\u09b8\u09c1\u09b2\u09c7\u09b6\u09a8 \u09ac\u09cd\u09af\u09b0\u09cd\u09a5\u09a4\u09be, \u09af\u09cb\u0997\u09be\u09af\u09cb\u0997 \u0985\u09ac\u0995\u09cd\u09b7\u09af\u09bc \u098f\u09ac\u0982 \u0986\u0997\u09c1\u09a8\u09c7\u09b0 \u099d\u09c1\u0981\u0995\u09bf \u09b0\u09cb\u09a7 \u0995\u09b0\u09a4\u09c7 \u09b8\u09b0\u09cd\u09ac\u09be\u09a7\u09bf\u0995 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09ac\u09c3\u09a6\u09cd\u09a7\u09bf\u09b0 \u09ae\u09be\u09a8 \u09aa\u09cd\u09b0\u09a4\u09bf\u09b7\u09cd\u09a0\u09be \u0995\u09b0\u09c7\u0964 (: UL 489 and IEC 60947-2 establish maximum temperature rise values to prevent insulation failure, contact degradation, and fire hazards in circuit breakers.).<\/li>\n<li><strong>\u09b8\u09cd\u099f\u09cd\u09af\u09be\u09a8\u09cd\u09a1\u09be\u09b0\u09cd\u09a1 \u09ac\u09a8\u09be\u09ae 100% \u09b0\u09c7\u099f\u09c7\u09a1 \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0 10\u00b0C \u09a6\u09cd\u09ac\u09be\u09b0\u09be \u09aa\u09c3\u09a5\u0995 (Standard vs. 100% rated breakers differ by 10\u00b0C)<\/strong>: \u09b8\u09cd\u099f\u09cd\u09af\u09be\u09a8\u09cd\u09a1\u09be\u09b0\u09cd\u09a1 \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0\u0997\u09c1\u09b2\u09bf 50\u00b0C \u099f\u09be\u09b0\u09cd\u09ae\u09bf\u09a8\u09be\u09b2 \u09ac\u09c3\u09a6\u09cd\u09a7\u09bf\u09b0 \u0985\u09a8\u09c1\u09ae\u09a4\u09bf \u09a6\u09c7\u09af\u09bc (40\u00b0C \u09aa\u09b0\u09bf\u09ac\u09c7\u09b7\u09cd\u099f\u09bf\u09a4 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be\u09af\u09bc 90\u00b0C \u09aa\u09b0\u09ae), \u09af\u09c7\u0996\u09be\u09a8\u09c7 100% \u09b0\u09c7\u099f\u09c7\u09a1 \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0\u0997\u09c1\u09b2\u09bf 60\u00b0C \u09ac\u09c3\u09a6\u09cd\u09a7\u09bf\u09b0 \u0985\u09a8\u09c1\u09ae\u09a4\u09bf \u09a6\u09c7\u09af\u09bc (100\u00b0C \u09aa\u09b0\u09ae)\u2014\u0995\u09cd\u09b0\u09ae\u09be\u0997\u09a4-\u09b6\u09c1\u09b2\u09cd\u0995 \u0985\u09cd\u09af\u09be\u09aa\u09cd\u09b2\u09bf\u0995\u09c7\u09b6\u09a8\u0997\u09c1\u09b2\u09bf\u09b0 \u099c\u09a8\u09cd\u09af \u098f\u0995\u099f\u09bf \u0997\u09c1\u09b0\u09c1\u09a4\u09cd\u09ac\u09aa\u09c2\u09b0\u09cd\u09a3 \u09aa\u09be\u09b0\u09cd\u09a5\u0995\u09cd\u09af\u0964 (: Standard breakers allow 50\u00b0C terminal rise (90\u00b0C absolute at 40\u00b0C ambient), while 100% rated breakers permit 60\u00b0C rise (100\u00b0C absolute)\u2014a crucial difference for continuous-duty applications.).<\/li>\n<li><strong>\u09aa\u09b0\u09ae \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be = \u09aa\u09b0\u09bf\u09ac\u09c7\u09b7\u09cd\u099f\u09bf\u09a4 + \u09ac\u09c3\u09a6\u09cd\u09a7\u09bf (Absolute temperature = Ambient + Rise)<\/strong>: \u09b8\u09b0\u09cd\u09ac\u09a6\u09be \u09aa\u09cd\u09b0\u0995\u09c3\u09a4 \u09aa\u09b0\u09bf\u09ac\u09c7\u09b7\u09cd\u099f\u09bf\u09a4 \u0985\u09ac\u09b8\u09cd\u09a5\u09be\u09b0 \u0989\u09aa\u09b0 \u09ad\u09bf\u09a4\u09cd\u09a4\u09bf \u0995\u09b0\u09c7 \u09aa\u09b0\u09ae \u099f\u09be\u09b0\u09cd\u09ae\u09bf\u09a8\u09be\u09b2 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u0997\u09a3\u09a8\u09be \u0995\u09b0\u09c1\u09a8, \u09b6\u09c1\u09a7\u09c1\u09ae\u09be\u09a4\u09cd\u09b0 \u09b8\u09cd\u099f\u09cd\u09af\u09be\u09a8\u09cd\u09a1\u09be\u09b0\u09cd\u09a1 40\u00b0C \u0995\u09cd\u09b0\u09ae\u09be\u0999\u09cd\u0995\u09a8 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09a8\u09af\u09bc, \u09ac\u09bf\u09b6\u09c7\u09b7 \u0995\u09b0\u09c7 \u0997\u09b0\u09ae \u09aa\u09b0\u09bf\u09ac\u09c7\u09b6\u09c7\u0964 (: Always calculate absolute terminal temperature based on actual ambient conditions, not just the standard 40\u00b0C calibration temperature, especially in hot environments.).<\/li>\n<li><strong>\u0995\u09a8\u09cd\u09a1\u09be\u0995\u09cd\u099f\u09b0 \u0987\u09a8\u09b8\u09c1\u09b2\u09c7\u09b6\u09a8 \u0985\u09ac\u09b6\u09cd\u09af\u0987 \u099f\u09be\u09b0\u09cd\u09ae\u09bf\u09a8\u09be\u09b2 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be\u09b0 \u09b8\u09be\u09a5\u09c7 \u09ae\u09bf\u09b2 \u09b0\u09be\u0996\u09a4\u09c7 \u09b9\u09ac\u09c7 (Conductor insulation must match terminal temperature)<\/strong>: \u0986\u09a7\u09c1\u09a8\u09bf\u0995 \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0\u09c7\u09b0 \u099c\u09a8\u09cd\u09af 90\u00b0C \u09b0\u09c7\u099f\u09af\u09c1\u0995\u09cd\u09a4 \u0995\u09a8\u09cd\u09a1\u09be\u0995\u09cd\u099f\u09b0 (THHN, XHHW-2) \u09ac\u09cd\u09af\u09ac\u09b9\u09be\u09b0 \u0995\u09b0\u09c1\u09a8; 60\u00b0C \u0987\u09a8\u09b8\u09c1\u09b2\u09c7\u09b6\u09a8 \u09ac\u09c7\u09b6\u09bf\u09b0\u09ad\u09be\u0997 \u0985\u09cd\u09af\u09be\u09aa\u09cd\u09b2\u09bf\u0995\u09c7\u09b6\u09a8\u09c7\u09b0 \u099c\u09a8\u09cd\u09af \u0985\u09aa\u09b0\u09cd\u09af\u09be\u09aa\u09cd\u09a4 \u098f\u09ac\u0982 \u0995\u09cb\u09a1 \u09aa\u09cd\u09b0\u09af\u09bc\u09cb\u099c\u09a8\u09c0\u09af\u09bc\u09a4\u09be \u09b2\u0999\u09cd\u0998\u09a8 \u0995\u09b0\u09c7\u0964 (: Use 90\u00b0C rated conductors (THHN, XHHW-2) for modern breakers; 60\u00b0C insulation is inadequate for most applications and violates code requirements.).<\/li>\n<li><strong>IR \u09a5\u09be\u09b0\u09cd\u09ae\u09cb\u0997\u09cd\u09b0\u09be\u09ab\u09bf\u09b0 \u099c\u09a8\u09cd\u09af 3+ \u0998\u09a8\u09cd\u099f\u09be \u09b8\u09cd\u09a5\u09bf\u09a4\u09bf\u09b6\u09c0\u09b2\u09a4\u09be \u09aa\u09cd\u09b0\u09af\u09bc\u09cb\u099c\u09a8 (IR thermography requires 3+ hours stabilization)<\/strong>: \u09b8\u09be\u09b0\u09cd\u0995\u09bf\u099f \u09ac\u09cd\u09b0\u09c7\u0995\u09be\u09b0\u0997\u09c1\u09b2\u09bf \u09a4\u09be\u09aa\u09c0\u09af\u09bc \u09b8\u09be\u09ae\u09cd\u09af\u09be\u09ac\u09b8\u09cd\u09a5\u09be\u09af\u09bc \u09aa\u09cc\u0981\u099b\u09be\u09a8\u09cb\u09b0 \u09aa\u09b0\u09c7\u0987 \u09a4\u09be\u09aa\u09c0\u09af\u09bc \u0987\u09ae\u09c7\u099c\u09bf\u0982 \u09b8\u09a0\u09bf\u0995\u2014\u0985\u0995\u09be\u09b2 \u09b0\u09bf\u09a1\u09bf\u0982 \u09aa\u09cd\u09b0\u0995\u09c3\u09a4 \u0985\u09aa\u09be\u09b0\u09c7\u099f\u09bf\u0982 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u0995\u09ae \u0995\u09b0\u09c7\u0964 (: Thermal imaging is only accurate after circuit breakers reach thermal equilibrium\u2014premature readings underestimate actual operating temperatures.).<\/li>\n<li><strong>\u0394T &gt; 30\u00b0C \u0985\u09ac\u09bf\u09b2\u09ae\u09cd\u09ac\u09c7 \u09a4\u09a6\u09a8\u09cd\u09a4\u09c7\u09b0 \u09a6\u09be\u09ac\u09bf \u099c\u09be\u09a8\u09be\u09af\u09bc (\u0394T &gt; 30\u00b0C demands immediate investigation)<\/strong>: \u09aa\u09b0\u09bf\u09ac\u09c7\u09b7\u09cd\u099f\u09bf\u09a4 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be\u09b0 \u0989\u09aa\u09b0\u09c7 30\u00b0C-\u098f\u09b0 \u09ac\u09c7\u09b6\u09bf \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be \u09ac\u09c3\u09a6\u09cd\u09a7\u09bf \u09a2\u09bf\u09b2\u09c7 \u09b8\u0982\u09af\u09cb\u0997, \u0993\u09ad\u09be\u09b0\u09b2\u09cb\u09a1\u09bf\u0982 \u09ac\u09be \u0985\u09ad\u09cd\u09af\u09a8\u09cd\u09a4\u09b0\u09c0\u09a3 \u0985\u09ac\u0995\u09cd\u09b7\u09af\u09bc \u09a8\u09bf\u09b0\u09cd\u09a6\u09c7\u09b6 \u0995\u09b0\u09c7 \u09af\u09be\u09b0 \u099c\u09a8\u09cd\u09af \u09a6\u09cd\u09b0\u09c1\u09a4 \u09b8\u0982\u09b6\u09cb\u09a7\u09a8\u09ae\u09c2\u09b2\u0995 \u09ac\u09cd\u09af\u09ac\u09b8\u09cd\u09a5\u09be \u09aa\u09cd\u09b0\u09af\u09bc\u09cb\u099c\u09a8\u0964 (: Temperature rise exceeding 30\u00b0C above ambient indicates loose connections, overloading, or internal degradation requiring prompt corrective action.).<\/li>\n<li><strong>IEC \u098f\u09ac\u0982 UL \u09b8\u09cd\u099f\u09cd\u09af\u09be\u09a8\u09cd\u09a1\u09be\u09b0\u09cd\u09a1\u0997\u09c1\u09b2\u09bf \u09ae\u09cc\u09b2\u09bf\u0995 \u09ac\u09bf\u09b7\u09af\u09bc\u0997\u09c1\u09b2\u09bf\u09b0 \u09b8\u09be\u09a5\u09c7 \u09b8\u09be\u09ae\u099e\u09cd\u099c\u09b8\u09cd\u09af\u09aa\u09c2\u09b0\u09cd\u09a3 (IEC and UL standards align on fundamentals)<\/strong>: \u09af\u09a6\u09bf\u0993 \u09aa\u09b0\u09c0\u0995\u09cd\u09b7\u09be\u09b0 \u09aa\u09a6\u09cd\u09a7\u09a4\u09bf \u09b8\u09be\u09ae\u09be\u09a8\u09cd\u09af \u09ad\u09bf\u09a8\u09cd\u09a8, IEC 60947-2 \u098f\u09ac\u0982 UL 489 \u0989\u09ad\u09af\u09bc\u0987 \u0985\u09a8\u09c1\u09b0\u09c2\u09aa \u099f\u09be\u09b0\u09cd\u09ae\u09bf\u09a8\u09be\u09b2 \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be\u09b0 \u09b8\u09c0\u09ae\u09be \u09b2\u0995\u09cd\u09b7\u09cd\u09af \u0995\u09b0\u09c7, \u09af\u09be \u09ac\u09bf\u09b6\u09cd\u09ac\u09ac\u09cd\u09af\u09be\u09aa\u09c0 \u09b8\u09c1\u09b0\u0995\u09cd\u09b7\u09be \u09ae\u09be\u09a8 \u09a8\u09bf\u09b6\u09cd\u099a\u09bf\u09a4 \u0995\u09b0\u09c7\u0964 (: While test procedures differ slightly, both IEC 60947-2 and UL 489 target similar terminal temperature limits, ensuring global safety standards.).<\/li>\n<li><strong>\u09aa\u09cd\u09b0\u09a4\u09bf\u09b0\u09cb\u09a7\u09ae\u09c2\u09b2\u0995 \u09b0\u0995\u09cd\u09b7\u09a3\u09be\u09ac\u09c7\u0995\u09cd\u09b7\u09a3 \u09ac\u09cd\u09af\u09b0\u09cd\u09a5\u09a4\u09be \u09aa\u09cd\u09b0\u09a4\u09bf\u09b0\u09cb\u09a7 \u0995\u09b0\u09c7 (Preventive maintenance prevents failures)<\/strong>: \u09a8\u09bf\u09af\u09bc\u09ae\u09bf\u09a4 \u09a4\u09be\u09aa\u09c0\u09af\u09bc \u09b8\u09ae\u09c0\u0995\u09cd\u09b7\u09be, \u09b8\u09a0\u09bf\u0995 \u099f\u09be\u09b0\u09cd\u09ae\u09bf\u09a8\u09be\u09b2 \u099f\u09b0\u09cd\u0995 \u098f\u09ac\u0982 \u09aa\u09cd\u09b0\u09ac\u09a3\u09a4\u09be \u09ac\u09bf\u09b6\u09cd\u09b2\u09c7\u09b7\u09a3 \u09a1\u09be\u0989\u09a8\u099f\u09be\u0987\u09ae \u09ac\u09be \u09b8\u09c1\u09b0\u0995\u09cd\u09b7\u09be \u0998\u099f\u09a8\u09be\u09b0 \u0995\u09be\u09b0\u09a3 \u09b9\u0993\u09af\u09bc\u09be\u09b0 \u0986\u0997\u09c7 \u09b8\u09ae\u09b8\u09cd\u09af\u09be\u0997\u09c1\u09b2\u09bf \u09b8\u09a8\u09be\u0995\u09cd\u09a4 \u0995\u09b0\u09c7\u2014IR \u09b8\u09b0\u099e\u09cd\u099c\u09be\u09ae \u098f\u09ac\u0982 \u09aa\u09cd\u09b0\u09b6\u09bf\u0995\u09cd\u09b7\u09a3\u09c7 \u09ac\u09bf\u09a8\u09bf\u09af\u09bc\u09cb\u0997 \u0995\u09b0\u09c1\u09a8\u0964 (: Regular thermal surveys, proper terminal torque, and trend analysis identify problems before they cause downtime or safety incidents\u2014invest in IR equipment and training.).<\/li>\n<\/ul>\n<p>\u09a8\u09bf\u09b0\u09cd\u09ad\u09b0\u09af\u09cb\u0997\u09cd\u09af \u09b8\u09be\u09b0\u09cd\u0995\u09bf\u099f \u09b8\u09c1\u09b0\u0995\u09cd\u09b7\u09be\u09b0 \u099c\u09a8\u09cd\u09af \u09af\u09be \u09b8\u09ac\u099a\u09c7\u09af\u09bc\u09c7 \u0995\u09a0\u09cb\u09b0 \u09a4\u09be\u09aa\u09c0\u09af\u09bc \u0995\u09b0\u09cd\u09ae\u0995\u09cd\u09b7\u09ae\u09a4\u09be \u09aa\u09cd\u09b0\u09af\u09bc\u09cb\u099c\u09a8\u09c0\u09af\u09bc\u09a4\u09be \u09aa\u09c2\u09b0\u09a3 \u0995\u09b0\u09c7, VIOX-\u098f\u09b0 \u09b8\u09ae\u09cd\u09aa\u09c2\u09b0\u09cd\u09a3 \u09b2\u09be\u0987\u09a8 \u0985\u09a8\u09cd\u09ac\u09c7\u09b7\u09a3 \u0995\u09b0\u09c1\u09a8 (For reliable circuit protection that meets the most stringent thermal performance requirements, explore VIOX\u2019s complete line of) <a href=\"https:\/\/test.viox.com\/bn\/mcb\/\">\u098f\u09ae\u09b8\u09bf\u09ac\u09bf<\/a> \u098f\u09ac\u0982 <a href=\"https:\/\/test.viox.com\/bn\/mccb\/\">\u098f\u09ae\u09b8\u09bf\u09b8\u09bf\u09ac\u09bf<\/a> IEC \u098f\u09ac\u0982 UL \u09ae\u09be\u09a8 \u0985\u09a8\u09c1\u09af\u09be\u09af\u09bc\u09c0 \u0987\u099e\u09cd\u099c\u09bf\u09a8\u09bf\u09af\u09bc\u09be\u09b0 \u0995\u09b0\u09be \u09b9\u09af\u09bc\u09c7\u099b\u09c7\u0964 \u0986\u09ae\u09be\u09a6\u09c7\u09b0 \u09aa\u09cd\u09b0\u09af\u09c1\u0995\u09cd\u09a4\u09bf\u0997\u09a4 \u09a6\u09b2 \u0986\u09aa\u09a8\u09be\u09b0 \u0987\u09a8\u09b8\u09cd\u099f\u09b2\u09c7\u09b6\u09a8\u0997\u09c1\u09b2\u09bf \u09a4\u09be\u09aa\u09ae\u09be\u09a4\u09cd\u09b0\u09be\u09b0 \u09b8\u09c0\u09ae\u09be\u09b0 \u09ae\u09a7\u09cd\u09af\u09c7 \u09a8\u09bf\u09b0\u09be\u09aa\u09a6\u09c7 \u0995\u09be\u099c \u0995\u09b0\u09c7 \u09a4\u09be \u09a8\u09bf\u09b6\u09cd\u099a\u09bf\u09a4 \u0995\u09b0\u09be\u09b0 \u099c\u09a8\u09cd\u09af \u09aa\u09a3\u09cd\u09af \u09a8\u09bf\u09b0\u09cd\u09ac\u09be\u099a\u09a8, \u09a4\u09be\u09aa\u09c0\u09af\u09bc \u09ac\u09bf\u09b6\u09cd\u09b2\u09c7\u09b7\u09a3 \u098f\u09ac\u0982 \u0985\u09cd\u09af\u09be\u09aa\u09cd\u09b2\u09bf\u0995\u09c7\u09b6\u09a8-\u09a8\u09bf\u09b0\u09cd\u09a6\u09bf\u09b7\u09cd\u099f \u09a8\u09bf\u09b0\u09cd\u09a6\u09c7\u09b6\u09bf\u0995\u09be \u09a6\u09bf\u09af\u09bc\u09c7 \u09b8\u09b9\u09be\u09af\u09bc\u09a4\u09be \u0995\u09b0\u09a4\u09c7 \u09aa\u09be\u09b0\u09c7\u0964 (engineered to IEC and UL standards. Our technical team can assist with product selection, thermal analysis, and application-specific guidance to ensure your installations operate safely within temperature limits.).<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Understanding Temperature Rise in Circuit Breakers: Why It Matters Every circuit breaker generates heat during normal operation. When electrical current flows through the internal components\u2014contacts, bimetal strips, and terminals\u2014resistance creates thermal energy. While some heating is inevitable, excessive temperature rise can degrade insulation, accelerate contact wear, cause nuisance tripping, and ultimately lead to catastrophic failure. [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":21371,"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-21369","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\/21369","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=21369"}],"version-history":[{"count":1,"href":"https:\/\/test.viox.com\/bn\/wp-json\/wp\/v2\/posts\/21369\/revisions"}],"predecessor-version":[{"id":21370,"href":"https:\/\/test.viox.com\/bn\/wp-json\/wp\/v2\/posts\/21369\/revisions\/21370"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/test.viox.com\/bn\/wp-json\/wp\/v2\/media\/21371"}],"wp:attachment":[{"href":"https:\/\/test.viox.com\/bn\/wp-json\/wp\/v2\/media?parent=21369"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/test.viox.com\/bn\/wp-json\/wp\/v2\/categories?post=21369"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/test.viox.com\/bn\/wp-json\/wp\/v2\/tags?post=21369"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}