{"id":21474,"date":"2026-01-28T18:23:42","date_gmt":"2026-01-28T10:23:42","guid":{"rendered":"https:\/\/viox.com\/?p=21474"},"modified":"2026-01-28T18:23:46","modified_gmt":"2026-01-28T10:23:46","slug":"mccb-short-time-delay-icw-rating-explained","status":"publish","type":"post","link":"https:\/\/test.viox.com\/km\/mccb-short-time-delay-icw-rating-explained\/","title":{"rendered":"\u17a0\u17c1\u178f\u17bb\u17a2\u17d2\u179c\u17b8\u1794\u17b6\u1793\u1787\u17b6 MCCB \u1795\u17d2\u178f\u179b\u17cb\u1793\u17bc\u179c\u1780\u17b6\u179a\u1780\u17b6\u179a\u1796\u17b6\u179a\u1780\u17b6\u179a\u1796\u1793\u17d2\u1799\u17b6\u1796\u17c1\u179b\u179a\u1799\u17c8\u1796\u17c1\u179b\u1781\u17d2\u179b\u17b8\u178a\u17c4\u1799\u1782\u17d2\u1798\u17b6\u1793\u1780\u1798\u17d2\u179a\u17b7\u178f\u1791\u1794\u17cb\u1791\u179b\u17cb\u1793\u17b9\u1784\u1785\u179a\u1793\u17d2\u178f\u179a\u1799\u17c8\u1796\u17c1\u179b\u1781\u17d2\u179b\u17b8 (I\u00b2t)?<sub>cw<\/sub>)"},"content":{"rendered":"<div class=\"product-intro\">\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/MCCB-electronic-trip-unit-in-industrial-panel-showing-400A-rating-and-current-display.webp\" alt=\"MCCB electronic trip unit in industrial panel showing 400A rating and current display - VIOX Electric\" \/><figcaption style=\"font-style: italic; color: #555; margin-top: 8px;\">\u17a7\u1794\u1780\u179a\u178e\u17cd\u200b\u1795\u17d2\u178a\u17b6\u1785\u17cb\u200b\u1785\u179a\u1793\u17d2\u178f\u200b\u17a2\u17c1\u17a1\u17b7\u1785\u178f\u17d2\u179a\u17bc\u1793\u17b7\u1780 MCCB \u1780\u17d2\u1793\u17bb\u1784\u200b\u1794\u1793\u17d2\u1791\u17c7\u200b\u17a7\u179f\u17d2\u179f\u17b6\u17a0\u1780\u1798\u17d2\u1798\u200b\u178a\u17c2\u179b\u200b\u1794\u1784\u17d2\u17a0\u17b6\u1789\u200b\u1780\u1798\u17d2\u179a\u17b7\u178f 400A \u1793\u17b7\u1784\u200b\u1780\u17b6\u179a\u200b\u1794\u1784\u17d2\u17a0\u17b6\u1789\u200b\u1785\u179a\u1793\u17d2\u178f \u2013 VIOX Electric<\/figcaption><\/figure>\n<h2>\u1785\u1798\u17d2\u179b\u17be\u1799\u1795\u17d2\u1791\u17b6\u179b\u17cb<\/h2>\n<p><strong><a href=\"https:\/\/test.viox.com\/km\/mccb\/\">\u17a7\u1794\u1780\u179a\u178e\u17cd\u1794\u17c6\u179b\u17c2\u1784\u179f\u17c0\u1782\u17d2\u179c\u17b8\u1795\u17d2\u179f\u17b7\u178f (MCCBs)<\/a> \u17a2\u17b6\u1785\u200b\u1795\u17d2\u178a\u179b\u17cb\u200b\u1780\u17b6\u179a\u200b\u1780\u17b6\u179a\u1796\u17b6\u179a\u200b\u1780\u17b6\u179a\u200b\u1796\u1793\u17d2\u1799\u17b6\u1796\u17c1\u179b\u200b\u179a\u1799\u17c8\u1796\u17c1\u179b\u200b\u1781\u17d2\u179b\u17b8\u200b\u178a\u17c4\u1799\u200b\u1782\u17d2\u1798\u17b6\u1793\u200b\u1785\u179a\u1793\u17d2\u178f\u200b\u1791\u1794\u17cb\u1791\u179b\u17cb\u200b\u179a\u1799\u17c8\u1796\u17c1\u179b\u200b\u1781\u17d2\u179b\u17b8\u200b\u178a\u17c2\u179b\u200b\u1794\u17b6\u1793\u200b\u1780\u17c6\u178e\u178f\u17cb (I<sub>cw<\/sub>) \u1796\u17b8\u1796\u17d2\u179a\u17c4\u17c7\u200b\u1796\u17bd\u1780\u200b\u179c\u17b6\u200b\u1787\u17b6\u200b\u1780\u1798\u17d2\u1798\u179f\u17b7\u1791\u17d2\u1792\u17b7\u200b\u179a\u1794\u179f\u17cb IEC 60947-2 \u1794\u17d2\u179a\u1797\u17c1\u1791 A \u178a\u17c2\u179b\u200b\u1780\u17b6\u179a\u200b\u1787\u17d2\u179a\u17be\u179f\u179a\u17be\u179f\u200b\u178f\u17d2\u179a\u17bc\u179c\u200b\u1794\u17b6\u1793\u200b\u179f\u1798\u17d2\u179a\u17c1\u1785\u200b\u178f\u17b6\u1798\u179a\u1799\u17c8\u200b\u1794\u1785\u17d2\u1785\u17c1\u1780\u179c\u17b7\u1791\u17d2\u1799\u17b6\u200b\u1780\u17c6\u178e\u178f\u17cb\u200b\u1785\u179a\u1793\u17d2\u178f\u200b\u1787\u17b6\u1787\u17b6\u1784\u200b\u1780\u17b6\u179a\u1796\u1793\u17d2\u1799\u17b6\u1796\u17c1\u179b\u200b\u178a\u17c4\u1799\u200b\u1785\u17c1\u178f\u1793\u17b6\u17d4.<\/strong> \u1798\u17b7\u1793\u200b\u178a\u17bc\u1785\u200b\u17a7\u1794\u1780\u179a\u178e\u17cd\u200b\u1795\u17d2\u178a\u17b6\u1785\u17cb\u200b\u179f\u17c0\u1782\u17d2\u179c\u17b8\u200b\u1781\u17d2\u1799\u179b\u17cb (ACB) \u1794\u17d2\u179a\u1797\u17c1\u1791 B \u178a\u17c2\u179b \u201c\u179a\u1784\u17cb\u1785\u17b6\u17c6\u201d \u1785\u179a\u1793\u17d2\u178f\u200b\u1780\u17c6\u17a0\u17bb\u179f\u200b\u178a\u17c4\u1799\u200b\u1794\u17d2\u179a\u17be I \u1781\u17d2\u1796\u179f\u17cb<sub>cw<\/sub> MCCB \u1794\u17d2\u179a\u17be\u200b\u1780\u17b6\u179a\u200b\u1785\u17d2\u179a\u17b6\u1793\u1785\u17c4\u179b\u200b\u1791\u17c6\u1793\u17b6\u1780\u17cb\u1791\u17c6\u1793\u1784\u200b\u17a2\u17c1\u17a1\u17b7\u1785\u178f\u17d2\u179a\u17bc\u200b\u1798\u17c9\u17b6\u1789\u17c9\u17c1\u1791\u17b7\u1785 \u1793\u17b7\u1784\u200b\u1780\u17b6\u179a\u200b\u179a\u17c6\u1781\u17b6\u1793\u200b\u1792\u17d2\u1793\u17bc\u200b\u179b\u17bf\u1793\u200b\u1794\u17c6\u1795\u17bb\u178f\u200b\u178a\u17be\u1798\u17d2\u1794\u17b8\u200b\u1780\u17c6\u178e\u178f\u17cb\u200b\u1790\u17b6\u1798\u1796\u179b\u200b\u1780\u17c6\u17a0\u17bb\u179f\u2014\u1780\u17b6\u179a\u1796\u17b6\u179a\u200b\u1781\u17d2\u179b\u17bd\u1793\u200b\u17af\u1784\u200b\u1781\u178e\u17c8\u1796\u17c1\u179b\u200b\u178a\u17c2\u179b\u200b\u1793\u17c5\u178f\u17c2\u200b\u179f\u1798\u17d2\u179a\u1794\u179f\u1798\u17d2\u179a\u17bd\u179b\u200b\u1787\u17b6\u1798\u17bd\u1799\u200b\u17a7\u1794\u1780\u179a\u178e\u17cd\u200b\u1781\u17b6\u1784\u1780\u17d2\u179a\u17c4\u1798\u200b\u178f\u17b6\u1798\u179a\u1799\u17c8\u200b\u179b\u1780\u17d2\u1781\u178e\u17c8\u200b\u1796\u1793\u17d2\u1799\u17b6\u1796\u17c1\u179b\u200b\u1781\u17d2\u179b\u17b8\u200b\u178a\u17c2\u179b\u1798\u17b6\u1793\u200b\u179f\u17d2\u179a\u17b6\u1794\u17cb\u200b\u179a\u1794\u179f\u17cb\u200b\u1796\u17bd\u1780\u200b\u179c\u17b6 (\u1787\u17b6\u1792\u1798\u17d2\u1798\u178f\u17b6 10-12\u00d7 I<sub>n<\/sub>) \u1781\u17b6\u1784\u1780\u17d2\u179a\u17c4\u1798\u200b\u1780\u1798\u17d2\u179a\u17b7\u178f\u200b\u1795\u17d2\u178a\u17b6\u1785\u17cb\u200b\u1797\u17d2\u179b\u17b6\u1798\u17d7\u17d4.<\/p>\n<hr \/>\n<h2>\u1782\u1793\u17d2\u179b\u17b9\u17c7\u200b\u1799\u1780<\/h2>\n<ul>\n<li>\u2705 <strong>\u1794\u17d2\u179a\u1797\u17c1\u1791 A \u1791\u179b\u17cb\u1793\u17b9\u1784 B<\/strong>\u17d6 MCCB (\u1794\u17d2\u179a\u1797\u17c1\u1791 A) \u1781\u17d2\u179c\u17c7 I \u178a\u17c2\u179b\u200b\u1794\u17b6\u1793\u200b\u1794\u17d2\u179a\u1780\u17b6\u179f<sub>cw<\/sub> \u1794\u17c9\u17bb\u1793\u17d2\u178f\u17c2\u200b\u1798\u17b6\u1793\u200b\u179f\u1798\u178f\u17d2\u1790\u1797\u17b6\u1796\u200b\u1791\u1794\u17cb\u1791\u179b\u17cb\u200b\u179a\u1799\u17c8\u1796\u17c1\u179b\u200b\u1781\u17d2\u179b\u17b8\u200b\u178a\u17c2\u179b\u1798\u17b6\u1793\u200b\u179f\u17d2\u179a\u17b6\u1794\u17cb\u200b\u1781\u17b6\u1784\u1780\u17d2\u179a\u17c4\u1798\u200b\u1780\u1798\u17d2\u179a\u17b7\u178f\u200b\u1785\u17d2\u179a\u17b6\u1793\u1785\u17c4\u179b\u200b\u1791\u17c6\u1793\u17b6\u1780\u17cb\u1791\u17c6\u1793\u1784\u200b\u179a\u1794\u179f\u17cb\u200b\u1796\u17bd\u1780\u200b\u179c\u17b6 (\u1787\u17b6\u1792\u1798\u17d2\u1798\u178f\u17b6 &gt;12-14\u00d7 I<sub>n<\/sub>)<\/li>\n<li>\u2705 <strong>\u179a\u17bc\u1794\u179c\u17b7\u1791\u17d2\u1799\u17b6\u200b\u1780\u17c6\u178e\u178f\u17cb\u200b\u1785\u179a\u1793\u17d2\u178f<\/strong>\u17d6 \u179f\u1798\u17d2\u1796\u17b6\u1792\u200b\u1793\u17b7\u1791\u17b6\u1783\u179a\u178a\u17bc\u179c\u200b\u1791\u17c6\u1793\u17b6\u1780\u17cb\u1791\u17c6\u1793\u1784\u200b\u1782\u17ba\u200b\u1791\u17b6\u1794\u200b\u178a\u17c4\u1799\u200b\u1785\u17c1\u178f\u1793\u17b6\u200b\u1780\u17d2\u1793\u17bb\u1784 MCCB \u178a\u17be\u1798\u17d2\u1794\u17b8\u200b\u1794\u17be\u1780\u200b\u1780\u17b6\u179a\u200b\u1785\u17d2\u179a\u17b6\u1793\u1785\u17c4\u179b\u200b\u17a2\u17c1\u17a1\u17b7\u1785\u178f\u17d2\u179a\u17bc\u200b\u1798\u17c9\u17b6\u1789\u17c9\u17c1\u1791\u17b7\u1785\u200b\u1799\u17c9\u17b6\u1784\u200b\u1786\u17b6\u1794\u17cb\u179a\u17a0\u17d0\u179f\u200b\u1793\u17c5\u200b\u1785\u179a\u1793\u17d2\u178f\u200b\u1780\u17c6\u17a0\u17bb\u179f\u200b\u1781\u17d2\u1796\u179f\u17cb (&gt;25\u00d7 I<sub>n<\/sub>) \u1780\u17b6\u179a\u1796\u17b6\u179a\u200b\u1780\u17b6\u179a\u200b\u1781\u17bc\u1785\u1781\u17b6\u178f\u200b\u178f\u17b6\u1798\u179a\u1799\u17c8\u200b\u1780\u17b6\u179a\u200b\u179a\u17c6\u1781\u17b6\u1793\u200b\u1799\u17c9\u17b6\u1784\u200b\u1786\u17b6\u1794\u17cb\u179a\u17a0\u17d0\u179f\u200b\u1787\u17b6\u1787\u17b6\u1784\u200b\u1780\u17b6\u179a\u200b\u1791\u1794\u17cb\u1791\u179b\u17cb\u200b\u1799\u17bc\u179a<\/li>\n<li>\u2705 <strong>\u1797\u17b6\u1796\u200b\u1796\u17b7\u178f\u200b\u1793\u17c3\u200b\u1780\u17b6\u179a\u200b\u1796\u1793\u17d2\u1799\u17b6\u1796\u17c1\u179b\u200b\u1781\u17d2\u179b\u17b8<\/strong>\u17d6 \u1780\u17b6\u179a\u200b\u1780\u17c6\u178e\u178f\u17cb\u200b\u1780\u17b6\u179a\u200b\u1796\u1793\u17d2\u1799\u17b6\u1796\u17c1\u179b\u200b\u1781\u17d2\u179b\u17b8 MCCB (\u17a7\u1791\u17b6\u17a0\u179a\u178e\u17cd 10\u00d7 I<sub>n<\/sub>, 0.4s) \u178a\u17c6\u178e\u17be\u179a\u1780\u17b6\u179a\u200b\u178f\u17c2\u200b\u1793\u17c5\u1796\u17c1\u179b\u200b\u178a\u17c2\u179b\u200b\u1785\u179a\u1793\u17d2\u178f\u200b\u1780\u17c6\u17a0\u17bb\u179f\u200b\u1793\u17c5\u200b\u1781\u17b6\u1784\u1780\u17d2\u179a\u17c4\u1798\u200b\u1780\u1798\u17d2\u179a\u17b7\u178f\u200b\u1795\u17d2\u178a\u17b6\u1785\u17cb\u200b\u1797\u17d2\u179b\u17b6\u1798\u17d7\u2014\u1780\u17b6\u179a\u200b\u179b\u17be\u179f\u200b\u1796\u17b8\u200b\u1793\u17c1\u17c7\u200b\u1794\u1784\u17d2\u1780\u200b\u17b1\u17d2\u1799\u200b\u1798\u17b6\u1793\u200b\u179f\u1780\u1798\u17d2\u1798\u1797\u17b6\u1796\u200b\u1797\u17d2\u179b\u17b6\u1798\u17d7\u200b\u178f\u17b6\u1798\u179a\u1799\u17c8\u200b\u1780\u17b6\u179a\u200b\u1795\u17d2\u178a\u17b6\u1785\u17cb\u200b\u1798\u17c9\u17b6\u1789\u17c9\u17c1\u1791\u17b7\u1785 \u17ac\u200b\u1799\u1793\u17d2\u178f\u1780\u17b6\u179a\u200b\u1795\u17d2\u17a2\u17c2\u1780\u200b\u179b\u17be\u200b\u1790\u17b6\u1798\u1796\u179b<\/li>\n<li>\u2705 <strong>\u178a\u17c2\u1793\u200b\u1780\u17c6\u178e\u178f\u17cb\u200b\u1793\u17c3\u200b\u1780\u17b6\u179a\u200b\u1787\u17d2\u179a\u17be\u179f\u179a\u17be\u179f<\/strong>\u17d6 \u1780\u17b6\u179a\u200b\u1787\u17d2\u179a\u17be\u179f\u179a\u17be\u179f\u200b\u1796\u17c1\u1789\u179b\u17c1\u1789\u200b\u179a\u179c\u17b6\u1784 MCCB \u1791\u17b6\u1798\u1791\u17b6\u179a\u200b\u178f\u17b6\u179a\u17b6\u1784\u200b\u179f\u1798\u17d2\u179a\u1794\u179f\u1798\u17d2\u179a\u17bd\u179b\u200b\u178a\u17c4\u1799\u200b\u1794\u17d2\u179a\u17bb\u1784\u1794\u17d2\u179a\u1799\u17d0\u178f\u17d2\u1793; \u1791\u17b9\u1780\u1792\u17d2\u179b\u17b6\u1780\u17cb ACB \u1791\u17c5 MCCB \u179f\u1798\u17d2\u179a\u17c1\u1785\u200b\u1794\u17b6\u1793\u200b\u179b\u1791\u17d2\u1792\u1795\u179b\u200b\u179b\u17d2\u17a2\u200b\u1794\u17d2\u179a\u179f\u17be\u179a\u200b\u1787\u17b6\u1784\u200b\u1798\u17bb\u1793\u200b\u178a\u17c4\u1799\u179f\u17b6\u179a\u200b\u178f\u17c2 ACB \u17a2\u17b6\u1785\u200b\u1796\u1793\u17d2\u1799\u17b6\u1796\u17c1\u179b\u200b\u1796\u17b7\u178f\u1794\u17d2\u179a\u17b6\u1780\u178a (I<sub>cw<\/sub> = I<sub>Icu<\/sub> \u179f\u1798\u178f\u17d2\u1790\u1797\u17b6\u1796) \u1781\u178e\u17c8\u1796\u17c1\u179b\u200b\u178a\u17c2\u179b MCCB \u178a\u17c4\u17c7\u179f\u17d2\u179a\u17b6\u1799\u200b\u1780\u17c6\u17a0\u17bb\u179f\u200b\u1793\u17c5\u200b\u1781\u17b6\u1784\u1780\u17d2\u179a\u17c4\u1798<\/li>\n<li>\u2705 <strong>\u1780\u17b6\u179a\u200b\u178f\u17d2\u179a\u17bd\u178f\u200b\u179b\u17be\u200b\u179f\u17bb\u179c\u178f\u17d2\u1790\u17b7\u1797\u17b6\u1796<\/strong>\u17d6 MCCB \u1780\u1798\u17d2\u179a\u17b7\u178f\u200b\u1781\u17d2\u1796\u179f\u17cb\u200b\u178a\u17c2\u179b\u200b\u1798\u17b6\u1793\u200b\u1780\u17b6\u179a\u200b\u1795\u17d2\u178a\u17b6\u1785\u17cb\u200b\u1797\u17d2\u179b\u17b6\u1798\u17d7\u200b\u178a\u17c2\u179b\u200b\u17a2\u17b6\u1785\u200b\u1785\u17b6\u1789\u17cb\u200b\u1794\u17b6\u1793 (\u17a7\u1791\u17b6\u17a0\u179a\u178e\u17cd Schneider NSX) \u179a\u17bd\u1798\u1794\u1789\u17d2\u1785\u17bc\u179b\u200b\u1798\u17bb\u1781\u1784\u17b6\u179a \u201c\u1780\u17b6\u179a\u200b\u1795\u17d2\u178a\u17b6\u1785\u17cb\u200b\u1790\u17b6\u1798\u1796\u179b\u201d \u17ac \u201c\u1780\u17b6\u179a\u200b\u178f\u17d2\u179a\u17bd\u178f\u200b\u179b\u17be\u200b\u1797\u17d2\u179b\u17b6\u1798\u17d7\u201d\u2014\u1794\u17d2\u179a\u179f\u17b7\u1793\u1794\u17be\u200b\u1785\u179a\u1793\u17d2\u178f\u200b\u1780\u17c6\u17a0\u17bb\u179f\u200b\u179b\u17be\u179f\u1796\u17b8 ~25\u00d7 I<sub>n<\/sub>, \u1799\u1793\u17d2\u178f\u1780\u17b6\u179a\u200b\u178a\u17c2\u179b\u200b\u178a\u17c6\u178e\u17be\u179a\u1780\u17b6\u179a\u200b\u178a\u17c4\u1799\u200b\u17a7\u179f\u17d2\u1798\u17d0\u1793\u200b\u1794\u1784\u17d2\u1781\u17c6\u200b\u17b1\u17d2\u1799\u200b\u1798\u17b6\u1793\u200b\u1780\u17b6\u179a\u200b\u1795\u17d2\u178a\u17b6\u1785\u17cb\u200b\u1797\u17d2\u179b\u17b6\u1798\u17d7\u200b\u178a\u17c4\u1799\u200b\u1798\u17b7\u1793\u200b\u1782\u17b7\u178f\u200b\u1796\u17b8\u200b\u1780\u17b6\u179a\u200b\u1780\u17c6\u178e\u178f\u17cb<\/li>\n<\/ul>\n<hr \/>\n<h2>\u1780\u17b6\u179a\u200b\u1799\u179b\u17cb\u178a\u17b9\u1784\u200b\u17a2\u17c6\u1796\u17b8\u200b\u1794\u17d2\u179a\u1797\u17c1\u1791\u200b\u1780\u17b6\u179a\u200b\u1787\u17d2\u179a\u17be\u179f\u179a\u17be\u179f IEC 60947-2<\/h2>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/Size-and-construction-comparison-between-ACB-with-Icw-rating-and-compact-MCCB-Category-A-breaker.webp\" alt=\"Size and construction comparison between ACB with Icw rating and compact MCCB Category A breaker - VIOX Electric\" \/><figcaption style=\"font-style: italic; color: #555; margin-top: 8px;\">\u1780\u17b6\u179a\u200b\u1794\u17d2\u179a\u17c0\u1794\u1792\u17c0\u1794\u200b\u1791\u17c6\u17a0\u17c6\u200b\u1793\u17b7\u1784\u200b\u1780\u17b6\u179a\u200b\u179f\u17b6\u1784\u179f\u1784\u17cb\u200b\u179a\u179c\u17b6\u1784 ACB \u1787\u17b6\u1798\u17bd\u1799\u200b\u1780\u1798\u17d2\u179a\u17b7\u178f Icw \u1793\u17b7\u1784\u200b\u17a7\u1794\u1780\u179a\u178e\u17cd\u200b\u1795\u17d2\u178a\u17b6\u1785\u17cb MCCB \u1794\u17d2\u179a\u1797\u17c1\u1791 A \u1794\u1784\u17d2\u179a\u17bd\u1798 \u2013 VIOX Electric<\/figcaption><\/figure>\n<h3>\u1794\u17d2\u179a\u1797\u17c1\u1791 B: ACB \u1787\u17b6\u1798\u17bd\u1799 I \u178a\u17c2\u179b\u200b\u1794\u17b6\u1793\u200b\u1794\u17d2\u179a\u1780\u17b6\u179f<sub>cw<\/sub><\/h3>\n<p>\u17a7\u1794\u1780\u179a\u178e\u17cd\u200b\u1795\u17d2\u178a\u17b6\u1785\u17cb\u200b\u179f\u17c0\u1782\u17d2\u179c\u17b8\u200b\u1781\u17d2\u1799\u179b\u17cb (ACB) \u178f\u17d2\u179a\u17bc\u179c\u200b\u1794\u17b6\u1793\u200b\u179a\u1785\u1793\u17b6\u200b\u17a1\u17be\u1784\u200b\u179f\u1798\u17d2\u179a\u17b6\u1794\u17cb <strong>\u1794\u17d2\u179a\u1797\u17c1\u1791 B<\/strong> \u1780\u1798\u17d2\u1798\u179c\u17b7\u1792\u17b8\u200b\u178a\u17c2\u179b\u200b\u1780\u17b6\u179a\u200b\u1787\u17d2\u179a\u17be\u179f\u179a\u17be\u179f\u200b\u178f\u17d2\u179a\u17bc\u179c\u200b\u1794\u17b6\u1793\u200b\u179f\u1798\u17d2\u179a\u17c1\u1785\u200b\u178f\u17b6\u1798\u179a\u1799\u17c8\u200b\u1780\u17b6\u179a\u1796\u1793\u17d2\u1799\u17b6\u1796\u17c1\u179b\u200b\u179a\u1799\u17c8\u1796\u17c1\u179b\u200b\u1781\u17d2\u179b\u17b8\u200b\u178a\u17c4\u1799\u200b\u1785\u17c1\u178f\u1793\u17b6\u17d4 \u1799\u17c4\u1784\u178f\u17b6\u1798 IEC 60947-2 \u17a7\u1794\u1780\u179a\u178e\u17cd\u200b\u1791\u17b6\u17c6\u1784\u1793\u17c1\u17c7\u200b\u178f\u17d2\u179a\u17bc\u179c\u178f\u17c2\u200b\u1794\u17d2\u179a\u1780\u17b6\u179f\u200b\u1785\u179a\u1793\u17d2\u178f\u200b\u1791\u1794\u17cb\u1791\u179b\u17cb\u200b\u179a\u1799\u17c8\u1796\u17c1\u179b\u200b\u1781\u17d2\u179b\u17b8\u200b\u178a\u17c2\u179b\u200b\u1794\u17b6\u1793\u200b\u1780\u17c6\u178e\u178f\u17cb (I<sub>cw<\/sub>)\u2014\u1785\u179a\u1793\u17d2\u178f\u200b\u1780\u17c6\u17a0\u17bb\u179f\u200b\u17a2\u178f\u17b7\u1794\u179a\u1798\u17b6\u200b\u178a\u17c2\u179b\u200b\u17a7\u1794\u1780\u179a\u178e\u17cd\u200b\u1795\u17d2\u178a\u17b6\u1785\u17cb\u200b\u17a2\u17b6\u1785\u200b\u1795\u17d2\u1791\u17bb\u1780\u200b\u1780\u17d2\u1793\u17bb\u1784\u200b\u1791\u17b8\u178f\u17b6\u17c6\u1784\u200b\u1794\u17b7\u1791\u200b\u179f\u1798\u17d2\u179a\u17b6\u1794\u17cb\u200b\u179a\u1799\u17c8\u1796\u17c1\u179b\u200b\u178a\u17c2\u179b\u200b\u1794\u17b6\u1793\u200b\u1794\u1789\u17d2\u1787\u17b6\u1780\u17cb (0.05s, 0.1s, 0.25s, 0.5s \u17ac 1.0s) \u178a\u17c4\u1799\u200b\u1798\u17b7\u1793\u200b\u1798\u17b6\u1793\u200b\u1780\u17b6\u179a\u200b\u1781\u17bc\u1785\u1781\u17b6\u178f\u17d4.<\/p>\n<p><strong>\u179b\u1780\u17d2\u1781\u178e\u17c8\u200b\u179f\u17c6\u1781\u17b6\u1793\u17cb\u200b\u1793\u17c3\u200b\u17a7\u1794\u1780\u179a\u178e\u17cd\u200b\u1795\u17d2\u178a\u17b6\u1785\u17cb\u200b\u1794\u17d2\u179a\u1797\u17c1\u1791 B\u17d6<\/strong><\/p>\n<table style=\"border-collapse: collapse; width: 100%; margin: 20px 0;\" border=\"1\" cellpadding=\"10\">\n<thead>\n<tr style=\"background-color: #f2f2f2;\">\n<th>\u1794\u17c9\u17b6\u179a\u17c9\u17b6\u1798\u17c9\u17c2\u178f\u17d2\u179a<\/th>\n<th>\u1780\u17b6\u179a\u1794\u1789\u17d2\u1787\u17b6\u1780\u17cb<\/th>\n<th>\u1782\u17c4\u179b\u1794\u17c6\u178e\u1784<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>\u1781\u17d2\u1789\u17bb\u17c6<sub>cw<\/sub> \u1780\u17b6\u179a\u179c\u17b6\u1799\u178f\u1798\u17d2\u179b\u17c3<\/strong><\/td>\n<td>\u17a2\u1794\u17d2\u1794\u1794\u179a\u1798\u17b6 12\u00d7 I<sub>n<\/sub> \u17ac 5kA (\u22642500A \u179f\u17ca\u17bb\u1798)<br \/>\n\u17a2\u1794\u17d2\u1794\u1794\u179a\u1798\u17b6 30kA (&gt;2500A \u179f\u17ca\u17bb\u1798)<\/td>\n<td>\u1794\u17be\u1780\u200b\u1780\u17b6\u179a\u200b\u1796\u1793\u17d2\u1799\u17b6\u1796\u17c1\u179b\u200b\u178a\u17c4\u1799\u200b\u1785\u17c1\u178f\u1793\u17b6\u200b\u1780\u17d2\u1793\u17bb\u1784\u17a2\u17c6\u17a1\u17bb\u1784\u1796\u17c1\u179b\u200b\u1798\u17b6\u1793\u200b\u1780\u17c6\u17a0\u17bb\u179f<\/td>\n<\/tr>\n<tr>\n<td><strong>\u1791\u17c6\u1793\u17b6\u1780\u17cb\u1791\u17c6\u1793\u1784\u179a\u1785\u1793\u17b6<\/strong><\/td>\n<td>\u179f\u1798\u17d2\u1796\u17b6\u1792\u200b\u1793\u17b7\u1791\u17b6\u1783\u179a\u178a\u17bc\u179c\u200b\u1781\u17d2\u1796\u179f\u17cb<\/td>\n<td>\u1780\u17b6\u179a\u1796\u17b6\u179a\u200b\u1780\u17b6\u179a\u200b\u1785\u17d2\u179a\u17b6\u1793\u1785\u17c4\u179b\u200b\u1791\u17c6\u1793\u17b6\u1780\u17cb\u1791\u17c6\u1793\u1784\u200b\u1780\u17d2\u1793\u17bb\u1784\u17a2\u17c6\u17a1\u17bb\u1784\u1796\u17c1\u179b\u200b\u1796\u1793\u17d2\u1799\u17b6\u1796\u17c1\u179b<\/td>\n<\/tr>\n<tr>\n<td><strong>\u17a2\u17b6\u1785\u200b\u1796\u1793\u17d2\u1799\u17b6\u179a\u1796\u17c1\u179b\u200b\u1780\u17b6\u179a\u200b\u1795\u17d2\u178a\u17b6\u1785\u17cb<\/strong><\/td>\n<td>\u1780\u17b6\u179a\u200b\u1795\u17d2\u178a\u17b6\u1785\u17cb\u200b\u1797\u17d2\u179b\u17b6\u1798\u17d7\u200b\u17a2\u17b6\u1785\u200b\u178f\u17d2\u179a\u17bc\u179c\u200b\u1794\u17b6\u1793\u200b\u1794\u17b7\u1791<\/td>\n<td>\u17a2\u1793\u17bb\u1789\u17d2\u1789\u17b6\u178f\u200b\u17b1\u17d2\u1799\u200b\u1798\u17b6\u1793\u200b\u1780\u17b6\u179a\u200b\u179f\u1798\u17d2\u179a\u1794\u179f\u1798\u17d2\u179a\u17bd\u179b\u200b\u1795\u17d2\u17a2\u17c2\u1780\u200b\u179b\u17be\u200b\u1796\u17c1\u179b\u179c\u17c1\u179b\u17b6\u200b\u179f\u17bb\u1791\u17d2\u1792<\/td>\n<\/tr>\n<tr>\n<td><strong>\u179c\u17b7\u1792\u17b8\u1792\u1798\u17d2\u1798\u178f\u17b6<\/strong><\/td>\n<td>\u17a2\u17d2\u1793\u1780\u200b\u1794\u1789\u17d2\u1785\u17bc\u179b\u200b\u1798\u17c1, \u17a2\u17d2\u1793\u1780\u200b\u1795\u17d2\u1782\u178f\u17cb\u1795\u17d2\u1782\u1784\u17cb\u200b\u1780\u17b6\u179a\u200b\u1785\u17c2\u1780\u1785\u17b6\u1799<\/td>\n<td>\u179f\u1798\u17d2\u179a\u1794\u179f\u1798\u17d2\u179a\u17bd\u179b\u200b\u1787\u17b6\u1798\u17bd\u1799 MCCB \u1781\u17b6\u1784\u1780\u17d2\u179a\u17c4\u1798<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u17a7\u1791\u17b6\u17a0\u179a\u178e\u17cd ACB 800A \u1787\u17b6\u1798\u17bd\u1799 I<sub>cw<\/sub> = 85kA\/1s \u17a2\u17b6\u1785\u200b\u1791\u1794\u17cb\u1791\u179b\u17cb\u200b\u1793\u17b9\u1784\u200b\u1785\u179a\u1793\u17d2\u178f\u200b\u1780\u17c6\u17a0\u17bb\u179f 85kA \u179a\u17a0\u17bc\u178f\u178a\u179b\u17cb 1 \u179c\u17b7\u1793\u17b6\u1791\u17b8 \u1781\u178e\u17c8\u1796\u17c1\u179b\u200b\u178a\u17c2\u179b\u200b\u1794\u1789\u17d2\u1787\u17bc\u1793\u178f\u200b\u1796\u1793\u17d2\u1799\u17b6\u1796\u17c1\u179b\u200b\u179a\u1799\u17c8\u1796\u17c1\u179b\u200b\u1781\u17d2\u179b\u17b8 \u201c\u179a\u1784\u17cb\u1785\u17b6\u17c6\u201d \u17a7\u1794\u1780\u179a\u178e\u17cd\u200b\u1781\u17b6\u1784\u1780\u17d2\u179a\u17c4\u1798\u200b\u178a\u17be\u1798\u17d2\u1794\u17b8\u200b\u179f\u1798\u17d2\u17a2\u17b6\u178f\u200b\u1780\u17c6\u17a0\u17bb\u179f\u17d4 \u179f\u1798\u178f\u17d2\u1790\u1797\u17b6\u1796\u200b\u1793\u17c1\u17c7\u200b\u1791\u17b6\u1798\u1791\u17b6\u179a\u200b\u1780\u17b6\u179a\u200b\u179f\u17b6\u1784\u179f\u1784\u17cb\u200b\u1798\u17c1\u1780\u17b6\u1793\u17b7\u1785\u200b\u178a\u17cf\u200b\u179a\u17b9\u1784\u1798\u17b6\u17c6\u2014\u178a\u17c3\u200b\u1791\u17c6\u1793\u17b6\u1780\u17cb\u1791\u17c6\u1793\u1784\u200b\u178a\u17c2\u179b\u200b\u1794\u17b6\u1793\u200b\u1796\u1784\u17d2\u179a\u17b9\u1784, \u179f\u1798\u17d2\u1796\u17b6\u1792\u200b\u1791\u17c6\u1793\u17b6\u1780\u17cb\u1791\u17c6\u1793\u1784\u200b\u1781\u17d2\u1796\u179f\u17cb (\u1780\u17b6\u179a\u1796\u17b6\u179a\u200b\u1780\u17b6\u179a\u200b\u1785\u17d2\u179a\u17b6\u1793\u1785\u17c4\u179b\u200b\u17a2\u17c1\u17a1\u17b7\u1785\u178f\u17d2\u179a\u17bc\u200b\u1798\u17c9\u17b6\u1789\u17c9\u17c1\u1791\u17b7\u1785) \u1793\u17b7\u1784\u200b\u1798\u17c9\u17b6\u179f\u17cb\u200b\u1780\u1798\u17d2\u178a\u17c5\u200b\u178a\u17be\u1798\u17d2\u1794\u17b8\u200b\u179f\u17d2\u179a\u17bc\u1794\u200b\u1799\u1780 I<sup>2<\/sup>t \u1790\u17b6\u1798\u1796\u179b\u17d4.<\/p>\n<h3>\u1794\u17d2\u179a\u1797\u17c1\u1791 A: MCCB \u178a\u17c4\u1799\u200b\u1782\u17d2\u1798\u17b6\u1793 I \u178a\u17c2\u179b\u200b\u1794\u17b6\u1793\u200b\u1794\u17d2\u179a\u1780\u17b6\u179f<sub>cw<\/sub><\/h3>\n<p>\u17a7\u1794\u1780\u179a\u178e\u17cd\u200b\u1795\u17d2\u178a\u17b6\u1785\u17cb\u200b\u179f\u17c0\u1782\u17d2\u179c\u17b8\u200b\u1780\u179a\u178e\u17b8\u200b\u178a\u17c2\u179b\u200b\u1794\u17b6\u1793\u200b\u178a\u17c6\u17a1\u17be\u1784 (MCCB) \u1787\u17b6\u1792\u1798\u17d2\u1798\u178f\u17b6\u200b\u1792\u17d2\u179b\u17b6\u1780\u17cb\u200b\u1780\u17d2\u179a\u17c4\u1798 <strong>\u1794\u17d2\u179a\u1797\u17c1\u1791 A<\/strong>\u2014\u17a7\u1794\u1780\u179a\u178e\u17cd \u201c\u1798\u17b7\u1793\u200b\u1798\u17b6\u1793\u200b\u1794\u17c6\u178e\u1784\u200b\u1787\u17b6\u1780\u17cb\u179b\u17b6\u1780\u17cb\u200b\u179f\u1798\u17d2\u179a\u17b6\u1794\u17cb\u200b\u1780\u17b6\u179a\u200b\u1787\u17d2\u179a\u17be\u179f\u179a\u17be\u179f\u200b\u1780\u17d2\u179a\u17c4\u1798\u200b\u179b\u1780\u17d2\u1781\u1781\u178e\u17d2\u178c\u200b\u179f\u17c0\u1782\u17d2\u179c\u17b8\u200b\u1781\u17d2\u179b\u17b8\u201d \u1799\u17c4\u1784\u178f\u17b6\u1798 IEC 60947-2\u17d4 \u17a7\u1794\u1780\u179a\u178e\u17cd\u200b\u1795\u17d2\u178a\u17b6\u1785\u17cb\u200b\u1791\u17b6\u17c6\u1784\u1793\u17c1\u17c7\u200b\u1798\u17b7\u1793\u200b\u1794\u17d2\u179a\u1780\u17b6\u179f I<sub>cw<\/sub> \u178f\u1798\u17d2\u179b\u17c3\u200b\u1791\u17c1\u200b\u178a\u17c4\u1799\u179f\u17b6\u179a\u200b\u178f\u17c2\u200b\u1791\u179f\u17d2\u179f\u1793\u179c\u17b7\u1787\u17d2\u1787\u17b6\u200b\u179a\u1785\u1793\u17b6\u200b\u179a\u1794\u179f\u17cb\u200b\u1796\u17bd\u1780\u200b\u179c\u17b6\u200b\u1795\u17d2\u178a\u17c4\u178f\u200b\u179f\u17c6\u1781\u17b6\u1793\u17cb\u200b\u179b\u17be <strong>\u1780\u17b6\u179a\u200b\u179a\u17c6\u1781\u17b6\u1793\u200b\u1780\u17c6\u17a0\u17bb\u179f\u200b\u1799\u17c9\u17b6\u1784\u200b\u1786\u17b6\u1794\u17cb\u179a\u17a0\u17d0\u179f<\/strong> \u179b\u17be\u200b\u1780\u17b6\u179a\u200b\u1791\u1794\u17cb\u1791\u179b\u17cb\u200b\u1780\u17c6\u17a0\u17bb\u179f\u200b\u1799\u17bc\u179a\u17d4.<\/p>\n<p><strong>\u17a0\u17c1\u178f\u17bb\u17a2\u17d2\u179c\u17b8\u200b\u1794\u17b6\u1793\u1787\u17b6 MCCB \u1798\u17b7\u1793\u200b\u1794\u17d2\u179a\u1780\u17b6\u179f I<sub>cw<\/sub>:<\/strong><\/p>\n<ol>\n<li><strong>\u1780\u17b6\u179a\u200b\u179a\u1785\u1793\u17b6\u200b\u1780\u17c6\u178e\u178f\u17cb\u200b\u1785\u179a\u1793\u17d2\u178f<\/strong>\u17d6 \u179f\u1798\u17d2\u1796\u17b6\u1792\u200b\u1793\u17b7\u1791\u17b6\u1783\u179a\u178a\u17bc\u179c\u200b\u1791\u17c6\u1793\u17b6\u1780\u17cb\u1791\u17c6\u1793\u1784\u200b\u1782\u17ba\u200b\u1791\u17b6\u1794\u200b\u178a\u17c4\u1799\u200b\u1785\u17c1\u178f\u1793\u17b6\u200b\u178a\u17be\u1798\u17d2\u1794\u17b8\u200b\u179f\u1798\u17d2\u179a\u17bd\u179b\u200b\u178a\u179b\u17cb\u200b\u1780\u17b6\u179a\u200b\u1785\u17d2\u179a\u17b6\u1793\u1785\u17c4\u179b\u200b\u17a2\u17c1\u17a1\u17b7\u1785\u178f\u17d2\u179a\u17bc\u200b\u1798\u17c9\u17b6\u1789\u17c9\u17c1\u1791\u17b7\u1785\u200b\u1799\u17c9\u17b6\u1784\u200b\u1786\u17b6\u1794\u17cb\u179a\u17a0\u17d0\u179f\u200b\u1793\u17c5\u1796\u17c1\u179b\u200b\u178a\u17c2\u179b\u200b\u1785\u179a\u1793\u17d2\u178f\u200b\u1780\u17c6\u17a0\u17bb\u179f\u200b\u179b\u17be\u179f\u1796\u17b8 ~10-14\u00d7 I<sub>n<\/sub><\/li>\n<li><strong>\u17a2\u17b6\u178e\u178f\u17d2\u178f\u17b7\u200b\u1793\u17c3\u200b\u1780\u17b6\u179a\u200b\u1795\u17d2\u178a\u17b6\u1785\u17cb\u200b\u1797\u17d2\u179b\u17b6\u1798\u17d7<\/strong>\u17d6 MCCB \u1797\u17b6\u1782\u1785\u17d2\u179a\u17be\u1793\u200b\u1798\u17b7\u1793\u200b\u17a2\u17b6\u1785\u200b\u1794\u17b7\u1791\u200b\u1780\u17b6\u179a\u200b\u1780\u17b6\u179a\u1796\u17b6\u179a\u200b\u1797\u17d2\u179b\u17b6\u1798\u17d7\u200b\u1794\u17b6\u1793\u200b\u1791\u17c1\u2014\u1780\u17c6\u17a0\u17bb\u179f\u200b\u178e\u17b6\u1798\u17bd\u1799\u200b\u178a\u17c2\u179b\u200b\u179b\u17be\u179f\u1796\u17b8\u200b\u1780\u1798\u17d2\u179a\u17b7\u178f\u200b\u1797\u17d2\u179b\u17b6\u1798\u17d7\u200b\u1794\u1784\u17d2\u1780\u200b\u17b1\u17d2\u1799\u200b\u1798\u17b6\u1793\u200b\u1780\u17b6\u179a\u200b\u1795\u17d2\u178a\u17b6\u1785\u17cb\u200b\u1797\u17d2\u179b\u17b6\u1798\u17d7<\/li>\n<li><strong>\u178a\u17c2\u1793\u200b\u1780\u17c6\u178e\u178f\u17cb\u200b\u1780\u1798\u17d2\u178a\u17c5<\/strong>\u17d6 \u1780\u17b6\u179a\u200b\u179f\u17b6\u1784\u179f\u1784\u17cb\u200b\u178a\u17c2\u179b\u200b\u1794\u17b6\u1793\u200b\u178a\u17c6\u17a1\u17be\u1784\u200b\u1794\u1784\u17d2\u179a\u17bd\u1798\u200b\u1798\u17b7\u1793\u200b\u17a2\u17b6\u1785\u200b\u179a\u17c6\u179f\u17b6\u1799\u200b\u1790\u17b6\u1798\u1796\u179b\u200b\u1780\u1798\u17d2\u178a\u17c5 (I<sup>2<\/sup>t) \u178a\u17c2\u179b\u200b\u1791\u17b6\u1780\u17cb\u1791\u1784\u200b\u1793\u17b9\u1784\u200b\u1780\u17b6\u179a\u200b\u1791\u1794\u17cb\u1791\u179b\u17cb\u200b\u1785\u179a\u1793\u17d2\u178f\u200b\u1781\u17d2\u1796\u179f\u17cb\u200b\u1799\u17bc\u179a<\/li>\n<\/ol>\n<p>\u1791\u17c4\u17c7\u1799\u17c9\u17b6\u1784\u178e\u17b6\u200b\u1780\u17cf\u200b\u178a\u17c4\u1799\u200b\u179a\u17bf\u1784\u200b\u1793\u17c1\u17c7\u200b\u1792\u17d2\u179c\u17be <strong>\u1798\u17b7\u1793<\/strong> \u1798\u17b6\u1793\u1793\u17d0\u1799\u200b\u1790\u17b6 MCCB \u1781\u17d2\u179c\u17c7\u200b\u179f\u1798\u178f\u17d2\u1790\u1797\u17b6\u1796\u200b\u1791\u1794\u17cb\u1791\u179b\u17cb\u200b\u179a\u1799\u17c8\u1796\u17c1\u179b\u200b\u1781\u17d2\u179b\u17b8\u200b\u1791\u17b6\u17c6\u1784\u179f\u17d2\u179a\u17bb\u1784\u2014\u1796\u17bd\u1780\u200b\u179c\u17b6\u200b\u1798\u17b6\u1793\u200b\u1780\u1798\u17d2\u179a\u17b7\u178f\u200b\u178a\u17c2\u179b\u200b\u1798\u17b7\u1793\u200b\u1794\u17b6\u1793\u200b\u1794\u17d2\u179a\u1780\u17b6\u179f\u200b\u178a\u17c2\u179b\u1798\u17b6\u1793\u200b\u179f\u17d2\u179a\u17b6\u1794\u17cb\u200b\u1781\u17b6\u1784\u1780\u17d2\u179a\u17c4\u1798\u200b\u178a\u17c2\u179b\u200b\u1791\u17c6\u1793\u17b6\u1780\u17cb\u1791\u17c6\u1793\u1784\u200b\u1793\u17c5\u178f\u17c2\u200b\u1794\u17b7\u1791\u17d4.<\/p>\n<hr \/>\n<h2>\u179a\u17bc\u1794\u179c\u17b7\u1791\u17d2\u1799\u17b6\u200b\u1793\u17c3\u200b\u1780\u17b6\u179a\u200b\u1785\u17d2\u179a\u17b6\u1793\u1785\u17c4\u179b\u200b\u1791\u17c6\u1793\u17b6\u1780\u17cb\u1791\u17c6\u1793\u1784 MCCB<\/h2>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/MCCB-electromagnetic-contact-repulsion-mechanism-diagram-showing-force-balance-and-current-thresholds.webp\" alt=\"MCCB electromagnetic contact repulsion mechanism diagram showing force balance and current thresholds - VIOX Electric\" \/><figcaption style=\"font-style: italic; color: #555; margin-top: 8px;\">\u1782\u17c6\u1793\u17bc\u179a\u200b\u178a\u17d2\u1799\u17b6\u1780\u17d2\u179a\u17b6\u1798\u200b\u1799\u1793\u17d2\u178f\u1780\u17b6\u179a\u200b\u1785\u17d2\u179a\u17b6\u1793\u1785\u17c4\u179b\u200b\u1791\u17c6\u1793\u17b6\u1780\u17cb\u1791\u17c6\u1793\u1784\u200b\u17a2\u17c1\u17a1\u17b7\u1785\u178f\u17d2\u179a\u17bc\u200b\u1798\u17c9\u17b6\u1789\u17c9\u17c1\u1791\u17b7\u1785 MCCB \u178a\u17c2\u179b\u200b\u1794\u1784\u17d2\u17a0\u17b6\u1789\u200b\u1796\u17b8\u200b\u178f\u17bb\u179b\u17d2\u1799\u1797\u17b6\u1796\u200b\u1780\u1798\u17d2\u179b\u17b6\u17c6\u1784 \u1793\u17b7\u1784\u200b\u1780\u1798\u17d2\u179a\u17b7\u178f\u200b\u1785\u179a\u1793\u17d2\u178f \u2013 VIOX Electric<\/figcaption><\/figure>\n<h3>\u1780\u1798\u17d2\u179a\u17b7\u178f\u200b\u1785\u17d2\u179a\u17b6\u1793\u1785\u17c4\u179b\u200b\u17a2\u17c1\u17a1\u17b7\u1785\u178f\u17d2\u179a\u17bc\u200b\u1798\u17c9\u17b6\u1789\u17c9\u17c1\u1791\u17b7\u1785<\/h3>\n<p>\u1793\u17c5\u1796\u17c1\u179b\u200b\u178a\u17c2\u179b\u200b\u1785\u179a\u1793\u17d2\u178f\u200b\u1780\u17c6\u17a0\u17bb\u179f\u200b\u17a0\u17bc\u179a\u200b\u1780\u17b6\u178f\u17cb\u200b\u1795\u17d2\u179b\u17bc\u179c\u200b\u1791\u17c6\u1793\u17b6\u1780\u17cb\u1791\u17c6\u1793\u1784\u200b\u179f\u17d2\u179a\u1794\u1782\u17d2\u1793\u17b6\u200b\u1780\u17d2\u1793\u17bb\u1784 MCCB \u179c\u17b6\u200b\u1794\u1784\u17d2\u1780\u17be\u178f\u200b\u179c\u17b6\u179b\u200b\u1798\u17c9\u17b6\u1789\u17c9\u17c1\u1791\u17b7\u1785\u200b\u1795\u17d2\u1791\u17bb\u1799\u1782\u17d2\u1793\u17b6\u200b\u178a\u17c2\u179b\u200b\u1794\u1784\u17d2\u1780\u17be\u178f <strong>\u1780\u1798\u17d2\u179b\u17b6\u17c6\u1784\u1785\u17d2\u179a\u17b6\u1793\u1785\u17c4\u179b\u17a2\u17c1\u17a1\u17b7\u1785\u178f\u17d2\u179a\u17bc\u178c\u17b8\u178e\u17b6\u1798\u17b7\u1780<\/strong> (\u1780\u1798\u17d2\u179b\u17b6\u17c6\u1784 Lorentz)\u17d4 \u178a\u17c2\u1780\u179f\u17d2\u1794\u0e23\u0e34\u0e07\u1791\u17c6\u1793\u17b6\u1780\u17cb\u1791\u17c6\u1793\u1784\u178f\u17d2\u179a\u17bc\u179c\u1791\u1794\u17cb\u1791\u179b\u17cb\u1793\u17b9\u1784\u1780\u1798\u17d2\u179b\u17b6\u17c6\u1784\u1793\u17c1\u17c7\u178a\u17be\u1798\u17d2\u1794\u17b8\u179a\u1780\u17d2\u179f\u17b6\u1791\u17c6\u1793\u17b6\u1780\u17cb\u1791\u17c6\u1793\u1784\u17b1\u17d2\u1799\u1793\u17c5\u1794\u17b7\u1791\u1787\u17b7\u178f\u17d4.<\/p>\n<p><strong>\u179f\u1798\u17b8\u1780\u17b6\u179a\u178f\u17bb\u179b\u17d2\u1799\u1797\u17b6\u1796\u1780\u1798\u17d2\u179b\u17b6\u17c6\u1784\u17d6<\/strong><\/p>\n<p style=\"text-align: center; background-color: #f9f9f9; padding: 10px; border-radius: 4px;\">\u1785<sub>\u179f\u17d2\u1794\u30d7\u30ea\u30f3\u30b0<\/sub> &gt; F<sub>\u1785\u17d2\u179a\u17b6\u1793\u1785\u17c4\u179b<\/sub> = k \u00b7 I<sup>2<\/sup><\/p>\n<p>\u1780\u1793\u17d2\u179b\u17c2\u1784\u178e\u17b6\u17d6<\/p>\n<ul>\n<li>\u1785<sub>\u179f\u17d2\u1794\u30d7\u30ea\u30f3\u30b0<\/sub> = \u1780\u1798\u17d2\u179b\u17b6\u17c6\u1784\u1794\u1784\u17d2\u17a0\u17b6\u1794\u17cb\u179f\u17d2\u1794\u30d7\u30ea\u30f3\u30b0\u1791\u17c6\u1793\u17b6\u1780\u17cb\u1791\u17c6\u1793\u1784<\/li>\n<li>\u1785<sub>\u1785\u17d2\u179a\u17b6\u1793\u1785\u17c4\u179b<\/sub> = \u1780\u1798\u17d2\u179b\u17b6\u17c6\u1784\u1785\u17d2\u179a\u17b6\u1793\u1785\u17c4\u179b\u17a2\u17c1\u17a1\u17b7\u1785\u178f\u17d2\u179a\u17bc\u1798\u17c9\u17b6\u1789\u17c9\u17c1\u1791\u17b7\u1780 (\u179f\u1798\u17b6\u1798\u17b6\u178f\u17d2\u179a\u1791\u17c5\u1793\u17b9\u1784 I<sup>2<\/sup>)<\/li>\n<li>k = \u1790\u17c1\u179a\u1792\u179a\u178e\u17b8\u1798\u17b6\u178f\u17d2\u179a (\u1782\u1798\u17d2\u179b\u17b6\u178f\u1791\u17c6\u1793\u17b6\u1780\u17cb\u1791\u17c6\u1793\u1784, \u1780\u17b6\u179a\u1780\u17c6\u178e\u178f\u17cb\u179a\u1785\u1793\u17b6\u179f\u1798\u17d2\u1796\u17d0\u1793\u17d2\u1792\u1785\u17c6\u17a0\u17b6\u1799)<\/li>\n<\/ul>\n<table style=\"border-collapse: collapse; width: 100%; margin: 20px 0;\" border=\"1\" cellpadding=\"10\">\n<thead>\n<tr style=\"background-color: #f2f2f2;\">\n<th>\u1794\u17c9\u17b6\u179a\u17c9\u17b6\u1798\u17c9\u17c2\u178f\u17d2\u179a\u179a\u1785\u1793\u17b6 MCCB<\/th>\n<th>\u1794\u17d2\u179a\u1797\u17c1\u1791 A (MCCB)<\/th>\n<th>\u1794\u17d2\u179a\u1797\u17c1\u1791 B (ACB)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>\u179f\u1798\u17d2\u1796\u17b6\u1792\u179f\u17d2\u1794\u30d7\u30ea\u30f3\u30b0\u1791\u17c6\u1793\u17b6\u1780\u17cb\u1791\u17c6\u1793\u1784<\/strong><\/td>\n<td>\u1791\u17b6\u1794 (2-5 N\/mm)<\/td>\n<td>\u1781\u17d2\u1796\u179f\u17cb (10-20 N\/mm)<\/td>\n<\/tr>\n<tr>\n<td><strong>\u1780\u1798\u17d2\u179a\u17b7\u178f\u1785\u17d2\u179a\u17b6\u1793\u1785\u17c4\u179b<\/strong><\/td>\n<td>12-14\u00d7 I<sub>n<\/sub><\/td>\n<td>&gt;50\u00d7 I<sub>n<\/sub><\/td>\n<\/tr>\n<tr>\n<td><strong>\u179b\u17d2\u1794\u17bf\u1793\u1794\u17be\u1780\u1791\u17c6\u1793\u17b6\u1780\u17cb\u1791\u17c6\u1793\u1784<\/strong><\/td>\n<td>3-7 ms (\u179b\u17bf\u1793\u1794\u17c6\u1795\u17bb\u178f)<\/td>\n<td>20-50 ms (\u1782\u17d2\u179a\u1794\u17cb\u1782\u17d2\u179a\u1784)<\/td>\n<\/tr>\n<tr>\n<td><strong>\u17a2\u17b6\u1791\u17b7\u1797\u17b6\u1796\u1793\u17c3\u1780\u17b6\u179a\u179a\u1785\u1793\u17b6<\/strong><\/td>\n<td>\u1780\u17c6\u178e\u178f\u17cb\u1790\u17b6\u1798\u1796\u179b\u1780\u17c6\u17a0\u17bb\u179f (I<sup>2<\/sup>t)<\/td>\n<td>\u1791\u1794\u17cb\u1791\u179b\u17cb\u1793\u17b9\u1784\u179a\u1799\u17c8\u1796\u17c1\u179b\u1780\u17c6\u17a0\u17bb\u179f<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>\u1780\u17b6\u179a\u1796\u17b7\u1785\u17b6\u179a\u178e\u17b6\u179b\u17be\u1780\u17b6\u179a\u1785\u17b6\u1794\u17cb\u1795\u17d2\u178f\u17be\u1798\u1798\u17c9\u17bc\u1791\u17d0\u179a<\/h3>\n<p>\u1780\u17b6\u179a\u179f\u17d2\u179a\u17b6\u179c\u1787\u17d2\u179a\u17b6\u179c\u178a\u17c4\u1799\u179c\u17b7\u1791\u17d2\u1799\u17b6\u179f\u17d2\u1790\u17b6\u1793\u179f\u17d2\u179a\u17b6\u179c\u1787\u17d2\u179a\u17b6\u179c\u17a2\u1782\u17d2\u1782\u17b7\u179f\u1793\u17b8\u179f\u17c0\u1784\u17a0\u17c3\u179b\u17be\u1782\u17c6\u179a\u17bc\u1798\u17c9\u17bc\u1791\u17d0\u179a\u1785\u17c6\u1793\u17bd\u1793 52 \u1794\u17b6\u1793\u1794\u1784\u17d2\u17a0\u17b6\u1789\u1790\u17b6\u1780\u17b6\u179a\u1785\u17b6\u1794\u17cb\u1795\u17d2\u178f\u17be\u1798\u178a\u17c4\u1799\u1795\u17d2\u1791\u17b6\u179b\u17cb (DOL) \u1794\u1784\u17d2\u1780\u17be\u178f\u1785\u179a\u1793\u17d2\u178f\u1794\u1789\u17d2\u1785\u17bc\u179b\u178a\u17c6\u1794\u17bc\u1784\u1793\u17c3 <strong>8-12\u00d7 I<sub>n<\/sub><\/strong> \u179f\u1798\u17d2\u179a\u17b6\u1794\u17cb\u1798\u17c9\u17bc\u1791\u17d0\u179a\u1797\u17b6\u1782\u1785\u17d2\u179a\u17be\u1793 \u1787\u17b6\u1798\u17bd\u1799\u1793\u17b9\u1784\u178f\u1798\u17d2\u179b\u17c3\u1781\u17d2\u179b\u17b6\u17c6\u1784\u1788\u17b6\u1793\u178a\u179b\u17cb 13\u00d7 I<sub>n<\/sub>.<\/p>\n<p><strong>\u1791\u17b7\u1793\u17d2\u1793\u1793\u17d0\u1799\u1793\u17c1\u17c7\u1787\u17c6\u179a\u17bb\u1789\u17b1\u17d2\u1799\u1798\u17b6\u1793\u1780\u17b6\u179a\u179a\u17b9\u178f\u1794\u1793\u17d2\u178f\u17b9\u1784\u1780\u17b6\u179a\u179a\u1785\u1793\u17b6 MCCB\u17d6<\/strong><\/p>\n<ul>\n<li><strong>MCCB \u1780\u17b6\u179a\u1785\u17c2\u1780\u1785\u17b6\u1799<\/strong>\u17d6 \u1780\u17b6\u179a\u1780\u17c6\u178e\u178f\u17cb\u178a\u17c6\u178e\u17be\u179a\u1780\u17c6\u179f\u17b6\u1793\u17d2\u178f\u1797\u17d2\u179b\u17b6\u1798\u17d7\u1793\u17c5 10-12\u00d7 I<sub>n<\/sub> (\u1798\u17b7\u1793\u178f\u17d2\u179a\u17bc\u179c\u1792\u17d2\u179c\u17be\u178a\u17c6\u178e\u17be\u179a\u179b\u17be\u1780\u17b6\u179a\u1794\u1789\u17d2\u1785\u17bc\u179b capacitor \u17ac\u1780\u17b6\u179a\u1794\u1789\u17d2\u1785\u17bc\u179b\u1790\u17b6\u1798\u1796\u179b transformer)<\/li>\n<li><strong>MCCB \u178a\u17c2\u179b\u1798\u17b6\u1793\u17a2\u178f\u17d2\u179a\u17b6\u1798\u17c9\u17bc\u1791\u17d0\u179a<\/strong>\u17d6 \u1780\u17b6\u179a\u1780\u17c6\u178e\u178f\u17cb\u178a\u17c6\u178e\u17be\u179a\u1780\u17c6\u179f\u17b6\u1793\u17d2\u178f\u1797\u17d2\u179b\u17b6\u1798\u17d7\u1793\u17c5 13-14\u00d7 I<sub>n<\/sub> (\u178f\u17d2\u179a\u17bc\u179c\u178f\u17c2\u1787\u17b7\u17c7\u1780\u17b6\u178f\u17cb\u1780\u17b6\u179a\u1785\u17b6\u1794\u17cb\u1795\u17d2\u178f\u17be\u1798 DOL)<\/li>\n<li><strong>\u1780\u1798\u17d2\u179a\u17b7\u178f\u1785\u17d2\u179a\u17b6\u1793\u1785\u17c4\u179b\u1791\u17c6\u1793\u17b6\u1780\u17cb\u1791\u17c6\u1793\u1784<\/strong>\u17d6 \u178f\u17d2\u179a\u17bc\u179c\u178f\u17c2\u179b\u17be\u179f\u1796\u17b8\u1780\u17b6\u179a\u1780\u17c6\u178e\u178f\u17cb\u178a\u17c6\u178e\u17be\u179a\u1780\u17c6\u179f\u17b6\u1793\u17d2\u178f\u1797\u17d2\u179b\u17b6\u1798\u17d7\u178a\u17c4\u1799\u179a\u17b9\u1798 15-20% \u178a\u17be\u1798\u17d2\u1794\u17b8\u1780\u17b6\u179a\u1796\u17b6\u179a\u1780\u17b6\u179a\u1794\u17be\u1780\u1791\u17c6\u1793\u17b6\u1780\u17cb\u1791\u17c6\u1793\u1784\u179a\u17c6\u1781\u17b6\u1793\u1780\u17c6\u17a1\u17bb\u1784\u1796\u17c1\u179b\u1794\u178e\u17d2\u178f\u17c4\u17c7\u17a2\u17b6\u179f\u1793\u17d2\u1793\u1785\u17b6\u1794\u17cb\u1795\u17d2\u178f\u17be\u1798<\/li>\n<\/ul>\n<p><strong>\u17a7\u1791\u17b6\u17a0\u179a\u178e\u17cd\u1793\u17c3\u1780\u17b6\u179a\u1782\u178e\u1793\u17b6\u179f\u1798\u17d2\u179a\u17b6\u1794\u17cb MCCB \u178a\u17c2\u179b\u1798\u17b6\u1793\u17a2\u178f\u17d2\u179a\u17b6\u1798\u17c9\u17bc\u1791\u17d0\u179a 100A\u17d6<\/strong><\/p>\n<div style=\"background-color: #f5f5f5; padding: 15px; border-radius: 5px; margin: 15px 0; font-family: monospace;\">\u1780\u17b6\u179a\u1780\u17c6\u178e\u178f\u17cb\u178a\u17c6\u178e\u17be\u179a\u1780\u17c6\u179f\u17b6\u1793\u17d2\u178f\u1797\u17d2\u179b\u17b6\u1798\u17d7\u17d6 13 \u00d7 100A = 1,300A<br \/>\n\u1780\u1798\u17d2\u179a\u17b7\u178f\u1785\u17d2\u179a\u17b6\u1793\u1785\u17c4\u179b\u1791\u17c6\u1793\u17b6\u1780\u17cb\u1791\u17c6\u1793\u1784\u17d6 1,300A \u00d7 1.2 = 1,560A (\u1782\u17c4\u179b\u178a\u17c5\u179a\u1785\u1793\u17b6)<br \/>\n\u179f\u1798\u178f\u17d2\u1790\u1797\u17b6\u1796 \u201cIcw\u201d \u178a\u17c2\u179b\u1798\u17b7\u1793\u1794\u17b6\u1793\u1794\u17d2\u179a\u1780\u17b6\u179f\u17d6 ~1,500A (\u1780\u17d2\u179a\u17c4\u1798\u1780\u1798\u17d2\u179a\u17b7\u178f\u1785\u17d2\u179a\u17b6\u1793\u1785\u17c4\u179b)<\/div>\n<p>\u1780\u1798\u17d2\u179a\u17b7\u178f 1,500A \u1793\u17c1\u17c7\u178f\u17c6\u178e\u17b6\u1784\u17b1\u17d2\u1799\u179f\u1798\u178f\u17d2\u1790\u1797\u17b6\u1796\u1791\u1794\u17cb\u1791\u179b\u17cb\u179a\u1799\u17c8\u1796\u17c1\u179b\u1781\u17d2\u179b\u17b8\u178a\u17c2\u179b\u1798\u17b6\u1793\u179f\u17d2\u179a\u17b6\u1794\u17cb\u179a\u1794\u179f\u17cb MCCB \u2014 \u1782\u17d2\u179a\u1794\u17cb\u1782\u17d2\u179a\u17b6\u1793\u17cb\u179f\u1798\u17d2\u179a\u17b6\u1794\u17cb\u1780\u17b6\u179a\u179f\u1798\u17d2\u179a\u1794\u179f\u1798\u17d2\u179a\u17bd\u179b\u1787\u17b6\u1798\u17bd\u1799\u17a7\u1794\u1780\u179a\u178e\u17cd\u1781\u17b6\u1784\u1780\u17d2\u179a\u17c4\u1798\u1793\u17c5\u1780\u17d2\u1793\u17bb\u1784\u1787\u17bd\u179a\u1780\u17c6\u17a0\u17bb\u179f 1,000-1,500A \u1794\u17c9\u17bb\u1793\u17d2\u178f\u17c2\u1791\u17b6\u1794\u1787\u17b6\u1784 I \u178a\u17c2\u179b\u1794\u17b6\u1793\u1794\u17d2\u179a\u1780\u17b6\u179f<sub>cw<\/sub> \u178f\u1798\u17d2\u179b\u17c3\u1793\u17c3 ACBs (\u1787\u17b6\u1792\u1798\u17d2\u1798\u178f\u17b6 30-85kA)\u17d4.<\/p>\n<hr \/>\n<h2>\u179a\u1794\u17c0\u1794\u178a\u17c2\u179b\u1780\u17b6\u179a\u1796\u1793\u17d2\u1799\u17b6\u1796\u17c1\u179b\u179a\u1799\u17c8\u1796\u17c1\u179b\u1781\u17d2\u179b\u17b8 MCCB \u1796\u17b7\u178f\u1787\u17b6\u178a\u17c6\u178e\u17be\u179a\u1780\u17b6\u179a<\/h2>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/Technical-infographic-clean-202601280514.webp\" alt=\"MCCB three-zone protection logic diagram showing overload, short-time delay, and instantaneous trip thresholds - VIOX Electric\" \/><figcaption style=\"font-style: italic; color: #555; margin-top: 8px;\">\u1782\u17c6\u1793\u17bc\u179f\u178f\u17b6\u1784\u17a1\u17bc\u1787\u17b8\u1781\u179b\u1780\u17b6\u179a\u1796\u17b6\u179a\u1794\u17b8\u178f\u17c6\u1794\u1793\u17cb MCCB \u178a\u17c2\u179b\u1794\u1784\u17d2\u17a0\u17b6\u1789\u1796\u17b8\u1780\u17b6\u179a\u1795\u17d2\u1791\u17bb\u1780\u179b\u17be\u179f\u1791\u1798\u17d2\u1784\u1793\u17cb \u1780\u17b6\u179a\u1796\u1793\u17d2\u1799\u17b6\u1796\u17c1\u179b\u179a\u1799\u17c8\u1796\u17c1\u179b\u1781\u17d2\u179b\u17b8 \u1793\u17b7\u1784\u1780\u1798\u17d2\u179a\u17b7\u178f\u178a\u17c6\u178e\u17be\u179a\u1780\u17c6\u179f\u17b6\u1793\u17d2\u178f\u1797\u17d2\u179b\u17b6\u1798\u17d7 \u2013 VIOX Electric<\/figcaption><\/figure>\n<h3>\u178f\u17c6\u1794\u1793\u17cb\u1794\u17d2\u179a\u178f\u17b7\u1794\u178f\u17d2\u178f\u17b7\u1780\u17b6\u179a\u1791\u17b6\u17c6\u1784\u1794\u17b8<\/h3>\n<p>MCCB \u178a\u17c6\u178e\u17be\u179a\u1780\u17c6\u179f\u17b6\u1793\u17d2\u178f\u17a2\u17c1\u17a1\u17b7\u1785\u178f\u17d2\u179a\u17bc\u1793\u17b7\u1780\u1791\u17c6\u1793\u17be\u1794\u1798\u17b6\u1793\u178f\u17c6\u1794\u1793\u17cb\u1780\u17b6\u179a\u1796\u17b6\u179a\u1785\u17c6\u1793\u17bd\u1793\u1794\u17b8 \u1794\u17c9\u17bb\u1793\u17d2\u178f\u17c2\u17a2\u1793\u17d2\u178f\u179a\u1780\u1798\u17d2\u1798\u179a\u1794\u179f\u17cb\u179c\u17b6\u1781\u17bb\u179f\u1782\u17d2\u1793\u17b6\u1787\u17b6\u1798\u17bc\u179b\u178a\u17d2\u178b\u17b6\u1793\u1796\u17b8 ACBs\u17d6<\/p>\n<table style=\"border-collapse: collapse; width: 100%; margin: 20px 0;\" border=\"1\" cellpadding=\"10\">\n<thead>\n<tr style=\"background-color: #f2f2f2;\">\n<th>\u178f\u17c6\u1794\u1793\u17cb\u1780\u17b6\u179a\u1796\u17b6\u179a<\/th>\n<th>\u1787\u17bd\u179a\u1780\u17b6\u179a\u1780\u17c6\u178e\u178f\u17cb<\/th>\n<th>\u17a2\u17b6\u1780\u1794\u17d2\u1794\u1780\u17b7\u179a\u17b7\u1799\u17b6\u1796\u17b7\u178f\u1794\u17d2\u179a\u17b6\u1780\u178a<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>\u179a\u1799\u17c8\u1796\u17c1\u179b\u179c\u17c2\u1784 (\u1795\u17d2\u1791\u17bb\u1780\u179b\u17be\u179f\u1791\u1798\u17d2\u1784\u1793\u17cb)<\/strong><\/td>\n<td>0.4-1.0\u00d7 I<sub>n<\/sub>, 3-30s<\/td>\n<td>\u1780\u17b6\u179a\u1780\u17b6\u179a\u1796\u17b6\u179a\u1780\u1798\u17d2\u178a\u17c5\u178f\u17b6\u1798\u179a\u1799\u17c8 I<sup>2<\/sup>\u1780\u17b6\u179a\u1782\u178e\u1793\u17b6 t<\/td>\n<\/tr>\n<tr>\n<td><strong>\u1780\u17b6\u179a\u1796\u1793\u17d2\u1799\u17b6\u1796\u17c1\u179b\u1781\u17d2\u179b\u17b8<\/strong><\/td>\n<td>2-12\u00d7 I<sub>n<\/sub>, 0.1-0.5s<\/td>\n<td><strong>\u179f\u1780\u1798\u17d2\u1798\u178f\u17c2\u1793\u17c5\u1781\u17b6\u1784\u1780\u17d2\u179a\u17c4\u1798\u1780\u1798\u17d2\u179a\u17b7\u178f\u1797\u17d2\u179b\u17b6\u1798\u17d7\u1794\u17c9\u17bb\u178e\u17d2\u178e\u17c4\u17c7<\/strong><\/td>\n<\/tr>\n<tr>\n<td><strong>\u1797\u17d2\u179b\u17b6\u1798\u17d7<\/strong><\/td>\n<td>10-14\u00d7 I<sub>n<\/sub> (\u1790\u17c1\u179a \u17ac\u17a2\u17b6\u1785\u179b\u17c3\u178f\u1798\u17d2\u179a\u17bc\u179c\u1794\u17b6\u1793)<\/td>\n<td><strong>\u1798\u17b7\u1793\u17a2\u17b6\u1785\u1794\u17b7\u1791\u1794\u17b6\u1793\u1793\u17c5\u1780\u17d2\u1793\u17bb\u1784 MCCB \u1797\u17b6\u1782\u1785\u17d2\u179a\u17be\u1793\u1791\u17c1<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>\u179f\u17c1\u178e\u17b6\u179a\u17b8\u1799\u17c9\u17bc\u1791\u17b8 1\u17d6 \u1785\u179a\u1793\u17d2\u178f\u1780\u17c6\u17a0\u17bb\u179f\u1780\u17d2\u179a\u17c4\u1798\u1780\u1798\u17d2\u179a\u17b7\u178f\u1797\u17d2\u179b\u17b6\u1798\u17d7<\/h3>\n<p><strong>\u179b\u1780\u17d2\u1781\u1781\u178e\u17d2\u178c<\/strong>\u17d6 \u1785\u179a\u1793\u17d2\u178f\u1780\u17c6\u17a0\u17bb\u179f = 8\u00d7 I<sub>n<\/sub> (800A \u179f\u1798\u17d2\u179a\u17b6\u1794\u17cb\u17a7\u1794\u1780\u179a\u178e\u17cd\u1794\u17c6\u1794\u17c2\u1780 100A)<\/p>\n<ol>\n<li>\u1785\u179a\u1793\u17d2\u178f\u179b\u17be\u179f\u178f\u17c6\u1794\u1793\u17cb\u179a\u1799\u17c8\u1796\u17c1\u179b\u179c\u17c2\u1784 \u2192 \u1780\u17b6\u179a\u1796\u1793\u17d2\u1799\u17b6\u1796\u17c1\u179b\u179a\u1799\u17c8\u1796\u17c1\u179b\u1781\u17d2\u179b\u17b8\u178a\u17c6\u178e\u17be\u179a\u1780\u17b6\u179a<\/li>\n<li>\u17a7\u1794\u1780\u179a\u178e\u17cd\u1794\u1789\u17d2\u1785\u17c1\u1789\u17a2\u17c1\u17a1\u17b7\u1785\u178f\u17d2\u179a\u17bc\u1793\u17b7\u1785\u1785\u17b6\u1794\u17cb\u1795\u17d2\u178f\u17be\u1798\u179a\u17b6\u1794\u17cb\u1790\u1799\u1780\u17d2\u179a\u17c4\u1799 (\u17a7\u1791\u17b6\u17a0\u179a\u178e\u17cd 0.4 \u179c\u17b7\u1793\u17b6\u1791\u17b8)<\/li>\n<li>\u1794\u17d2\u179a\u179f\u17b7\u1793\u1794\u17be\u1780\u17c6\u17a0\u17bb\u179f\u1793\u17c5\u178f\u17c2\u1794\u1793\u17d2\u178f \u17a7\u1794\u1780\u179a\u178e\u17cf\u1794\u1789\u17d2\u1785\u17c1\u1789\u1790\u17b6\u1798\u1796\u179b\u1794\u1793\u17d2\u1791\u17b6\u1794\u17cb\u1796\u17b8\u1780\u17b6\u179a\u1796\u1793\u17d2\u1799\u17b6\u1796\u17c1\u179b<\/li>\n<li>\u1794\u17b7\u1791\u1794\u17be\u1780\u1791\u17c6\u1793\u17b6\u1780\u17cb\u1791\u17c6\u1793\u1784\u178f\u17b6\u1798\u179a\u1799\u17c8\u1799\u1793\u17d2\u178f\u1780\u17b6\u179a\u1790\u17b6\u1798\u1796\u179b\u178a\u17c2\u179b\u1795\u17d2\u1791\u17bb\u1780 (~ 20-30 ms \u1796\u17c1\u179b\u179c\u17c1\u179b\u17b6\u1794\u17be\u1780)<\/li>\n<\/ol>\n<p><strong>\u179b\u1791\u17d2\u1792\u1795\u179b<\/strong>\u17d6 \u1780\u17b6\u179a\u179f\u1798\u17d2\u179a\u1794\u179f\u1798\u17d2\u179a\u17bd\u179b\u1780\u17b6\u179a\u1796\u1793\u17d2\u1799\u17b6\u1796\u17c1\u179b\u1796\u17b7\u178f\u1794\u17d2\u179a\u17b6\u1780\u178a\u1787\u17b6\u1798\u17bd\u1799\u17a7\u1794\u1780\u179a\u178e\u17cd\u1793\u17c5\u1781\u17b6\u1784\u1780\u17d2\u179a\u17c4\u1798<\/p>\n<h3>\u179f\u17c1\u178e\u17b6\u179a\u17b8\u1799\u17c9\u17bc\u1791\u17b8 2: \u1785\u179a\u1793\u17d2\u178f\u1780\u17c6\u17a0\u17bb\u179f\u179b\u17be\u179f\u1780\u1798\u17d2\u179a\u17b7\u178f\u1780\u17c6\u178e\u178f\u17cb\u1794\u1793\u17d2\u1791\u17b6\u1793\u17cb<\/h3>\n<p><strong>\u179b\u1780\u17d2\u1781\u1781\u178e\u17d2\u178c<\/strong>\u17d6 \u1785\u179a\u1793\u17d2\u178f\u1780\u17c6\u17a0\u17bb\u179f = 15 \u00d7 I<sub>n<\/sub> (1,500A \u179f\u1798\u17d2\u179a\u17b6\u1794\u17cb\u17a7\u1794\u1780\u179a\u178e\u17cd\u1794\u17c6\u1794\u17c2\u1780\u179f\u17c0\u1782\u17d2\u179c\u17b8 100A)<\/p>\n<ol>\n<li>\u1785\u179a\u1793\u17d2\u178f\u179b\u17be\u179f\u1780\u1798\u17d2\u179a\u17b7\u178f\u1780\u17c6\u178e\u178f\u17cb\u1794\u1793\u17d2\u1791\u17b6\u1793\u17cb \u2192 \u1780\u17b6\u179a\u1794\u1789\u17d2\u1785\u17c1\u1789\u1798\u17c9\u17b6\u1789\u17c9\u17c1\u1791\u17b7\u1785\u178a\u17c6\u178e\u17be\u179a\u1780\u17b6\u179a\u1797\u17d2\u179b\u17b6\u1798\u17d7<\/li>\n<li>\u1780\u17b6\u179a\u1780\u17c6\u178e\u178f\u17cb\u1780\u17b6\u179a\u1796\u1793\u17d2\u1799\u17b6\u1796\u17c1\u179b\u179a\u1799\u17c8\u1796\u17c1\u179b\u1781\u17d2\u179b\u17b8\u1782\u17ba <strong>\u178f\u17d2\u179a\u17bc\u179c\u1794\u17b6\u1793\u179a\u17c6\u179b\u1784<\/strong><\/li>\n<li>\u17a7\u1794\u1780\u179a\u178e\u17cf\u1794\u1789\u17d2\u1785\u17c1\u1789\u1790\u17b6\u1798\u1796\u179b\u1780\u17d2\u1793\u17bb\u1784\u179a\u1799\u17c8\u1796\u17c1\u179b 5-10 ms<\/li>\n<li>\u1794\u17b7\u1791\u1794\u17be\u1780\u1791\u17c6\u1793\u17b6\u1780\u17cb\u1791\u17c6\u1793\u1784 \u1794\u17c9\u17bb\u1793\u17d2\u178f\u17c2\u1785\u179a\u1793\u17d2\u178f\u1780\u17c6\u17a0\u17bb\u179f\u1794\u17d2\u179a\u17a0\u17c2\u179b\u1787\u17b6\u1794\u17b6\u1793\u1794\u178e\u17d2\u178f\u17b6\u179b\u17b1\u17d2\u1799\u1798\u17b6\u1793\u1780\u17b6\u179a\u1785\u17d2\u179a\u17b6\u1793\u1785\u17c4\u179b\u17a2\u17c1\u17a1\u17b7\u1785\u178f\u17d2\u179a\u17bc\u1798\u17c9\u17b6\u1789\u17c9\u17c1\u1791\u17b7\u1785\u179a\u17bd\u1785\u17a0\u17be\u1799<\/li>\n<\/ol>\n<p><strong>\u179b\u1791\u17d2\u1792\u1795\u179b<\/strong>\u17d6 \u1782\u17d2\u1798\u17b6\u1793\u1780\u17b6\u179a\u1796\u1793\u17d2\u1799\u17b6\u1796\u17c1\u179b\u178a\u17c4\u1799\u1785\u17c1\u178f\u1793\u17b6\u1791\u17c1 \u2014 MCCB \u1794\u17b7\u1791\u1794\u17be\u1780\u17b1\u17d2\u1799\u1794\u17b6\u1793\u179b\u17bf\u1793\u178f\u17b6\u1798\u178a\u17c2\u179b\u17a2\u17b6\u1785\u1792\u17d2\u179c\u17be\u1791\u17c5\u1794\u17b6\u1793<\/p>\n<h3>\u179f\u17c1\u178e\u17b6\u179a\u17b8\u1799\u17c9\u17bc\u1791\u17b8 3: \u1785\u179a\u1793\u17d2\u178f\u1780\u17c6\u17a0\u17bb\u179f\u179b\u17be\u179f\u1780\u1798\u17d2\u179a\u17b7\u178f\u1780\u17c6\u178e\u178f\u17cb\u1780\u17b6\u179a\u1785\u17d2\u179a\u17b6\u1793\u1785\u17c4\u179b<\/h3>\n<p><strong>\u179b\u1780\u17d2\u1781\u1781\u178e\u17d2\u178c<\/strong>\u17d6 \u1785\u179a\u1793\u17d2\u178f\u1780\u17c6\u17a0\u17bb\u179f = 50 \u00d7 I<sub>n<\/sub> (5,000A \u179f\u1798\u17d2\u179a\u17b6\u1794\u17cb\u17a7\u1794\u1780\u179a\u178e\u17cd\u1794\u17c6\u1794\u17c2\u1780\u179f\u17c0\u1782\u17d2\u179c\u17b8 100A \u1781\u17b7\u178f\u1787\u17b7\u178f I<sub>Icu<\/sub>)<\/p>\n<ol>\n<li>\u1780\u1798\u17d2\u179b\u17b6\u17c6\u1784\u1785\u17d2\u179a\u17b6\u1793\u1785\u17c4\u179b\u17a2\u17c1\u17a1\u17b7\u1785\u178f\u17d2\u179a\u17bc\u1798\u17c9\u17b6\u1789\u17c9\u17c1\u1791\u17b7\u1785\u179b\u17be\u179f\u1796\u17b8\u179f\u1798\u17d2\u1796\u17b6\u1792\u1793\u17b7\u1791\u17b6\u1783\u179a\u178a\u17bc\u179c<\/li>\n<li>\u1794\u17b7\u1791\u1794\u17be\u1780\u1791\u17c6\u1793\u17b6\u1780\u17cb\u1791\u17c6\u1793\u1784\u178a\u17b6\u1785\u17cb\u1796\u17b8\u1782\u17d2\u1793\u17b6\u1780\u17d2\u1793\u17bb\u1784\u179a\u1799\u17c8\u1796\u17c1\u179b 3-7 ms (\u179b\u17bf\u1793\u1787\u17b6\u1784\u1799\u1793\u17d2\u178f\u1780\u17b6\u179a\u1794\u1789\u17d2\u1785\u17c1\u1789)<\/li>\n<li>\u179c\u17c9\u17bb\u179b\u1792\u17d2\u1793\u17bc\u1780\u17be\u1793\u17a1\u17be\u1784\u1799\u17c9\u17b6\u1784\u1786\u17b6\u1794\u17cb\u179a\u17a0\u17d0\u179f \u1780\u17c6\u178e\u178f\u17cb\u1785\u179a\u1793\u17d2\u178f\u1780\u17c6\u1796\u17bc\u179b (\u179f\u1780\u1798\u17d2\u1798\u1797\u17b6\u1796\u1780\u17c6\u178e\u178f\u17cb\u1785\u179a\u1793\u17d2\u178f)<\/li>\n<li>\u1790\u17b6\u1798\u1796\u179b\u1792\u17d2\u1793\u17bc\u17a2\u17b6\u1785\u1794\u1784\u17d2\u1780\u17b1\u17d2\u1799\u1798\u17b6\u1793\u1799\u1793\u17d2\u178f\u1780\u17b6\u179a\u1794\u1789\u17d2\u1785\u17c1\u1789 \u17ac\u17a7\u1794\u1780\u179a\u178e\u17cd\u1794\u17c6\u1794\u17c2\u1780\u179f\u17c0\u1782\u17d2\u179c\u17b8\u1796\u17b9\u1784\u1795\u17d2\u17a2\u17c2\u1780\u179b\u17be\u1780\u17b6\u179a\u1796\u1793\u17d2\u179b\u178f\u17cb\u1792\u17d2\u1793\u17bc\u178f\u17c2\u17af\u1784<\/li>\n<\/ol>\n<p><strong>\u179b\u1791\u17d2\u1792\u1795\u179b<\/strong>\u17d6 \u1780\u17b6\u179a\u1780\u17c6\u178e\u178f\u17cb\u1785\u179a\u1793\u17d2\u178f\u179b\u17bf\u1793\u1794\u17c6\u1795\u17bb\u178f \u2014 \u1782\u17d2\u1798\u17b6\u1793\u1780\u17b6\u179a\u179f\u1798\u17d2\u179a\u1794\u179f\u1798\u17d2\u179a\u17bd\u179b\u1791\u17c1 \u1794\u17c9\u17bb\u1793\u17d2\u178f\u17c2\u1780\u17b6\u179a\u1780\u17b6\u179a\u1796\u17b6\u179a\u17a7\u1794\u1780\u179a\u178e\u17cd\u178f\u17b6\u1798\u179a\u1799\u17c8\u1780\u17b6\u179a\u1780\u17b6\u178f\u17cb\u1794\u1793\u17d2\u1790\u1799 I<sup>2<\/sup>t<\/p>\n<hr \/>\n<h2>\u1780\u179a\u178e\u17b8\u1796\u17b7\u179f\u17c1\u179f: MCCB \u1787\u17b6\u1798\u17bd\u1799\u1793\u17b9\u1784\u1780\u17b6\u179a\u1794\u1789\u17d2\u1785\u17c1\u1789\u1794\u1793\u17d2\u1791\u17b6\u1793\u17cb\u178a\u17c2\u179b\u17a2\u17b6\u1785\u1780\u1798\u17d2\u1785\u17b6\u178f\u17cb\u1794\u17b6\u1793<\/h2>\n<h3>\u1799\u1793\u17d2\u178f\u1780\u17b6\u179a \u201c\u1794\u1789\u17d2\u1785\u17c1\u1789\u1790\u17b6\u1798\u1796\u179b\u201d \u179a\u1794\u179f\u17cb Schneider NSX<\/h3>\n<p>MCCB \u1780\u1798\u17d2\u179a\u17b7\u178f\u1781\u17d2\u1796\u179f\u17cb\u1798\u17bd\u1799\u1785\u17c6\u1793\u17bd\u1793 (\u17a7\u1791\u17b6\u17a0\u179a\u178e\u17cd Schneider Electric NSX \u1787\u17b6\u1798\u17bd\u1799\u17a2\u1784\u17d2\u1782\u1797\u17b6\u1796\u1794\u1789\u17d2\u1785\u17c1\u1789 Micrologic) \u17a2\u1793\u17bb\u1789\u17d2\u1789\u17b6\u178f\u17b1\u17d2\u1799\u1780\u17b6\u179a\u1780\u17b6\u179a\u1796\u17b6\u179a\u1794\u1793\u17d2\u1791\u17b6\u1793\u17cb\u178f\u17d2\u179a\u17bc\u179c\u1794\u17b6\u1793\u1794\u17b7\u1791\u179f\u1798\u17d2\u179a\u17b6\u1794\u17cb\u1780\u17b6\u179a\u1787\u17d2\u179a\u17be\u179f\u179a\u17be\u179f\u1780\u17b6\u1793\u17cb\u178f\u17c2\u1794\u17d2\u179a\u179f\u17be\u179a\u17d4 \u1791\u17c4\u17c7\u1799\u17c9\u17b6\u1784\u178e\u17b6\u1780\u17cf\u178a\u17c4\u1799 \u17a7\u1794\u1780\u179a\u178e\u17cd\u1791\u17b6\u17c6\u1784\u1793\u17c1\u17c7\u179a\u17bd\u1798\u1794\u1789\u17d2\u1785\u17bc\u179b\u1793\u17bc\u179c <strong>\u1780\u17b6\u179a\u178f\u17d2\u179a\u17bd\u178f\u1796\u17b7\u1793\u17b7\u178f\u17d2\u1799\u179f\u17bb\u179c\u178f\u17d2\u1790\u17b7\u1797\u17b6\u1796\u1787\u17b6\u1780\u17b6\u178f\u1796\u17d2\u179c\u1780\u17b7\u1785\u17d2\u1785<\/strong> \u17a0\u17c5\u1790\u17b6 \u201c\u1780\u17b6\u179a\u1794\u1789\u17d2\u1785\u17c1\u1789\u1790\u17b6\u1798\u1796\u179b\u201d \u17ac \u201c\u1780\u17b6\u179a\u178f\u17d2\u179a\u17bd\u178f\u1796\u17b7\u1793\u17b7\u178f\u17d2\u1799\u1794\u1793\u17d2\u1791\u17b6\u1793\u17cb\u201d \u17d4\u201d<\/p>\n<p><strong>\u179a\u1794\u17c0\u1794\u178a\u17c2\u179b\u179c\u17b6\u178a\u17c6\u178e\u17be\u179a\u1780\u17b6\u179a\u17d6<\/strong><\/p>\n<ol>\n<li>\u17a2\u17d2\u1793\u1780\u1794\u17d2\u179a\u17be\u1794\u17d2\u179a\u17b6\u179f\u17cb\u1794\u17b7\u1791\u1780\u17b6\u179a\u1794\u1789\u17d2\u1785\u17c1\u1789\u1794\u1793\u17d2\u1791\u17b6\u1793\u17cb \u1794\u17be\u1780\u1780\u17b6\u179a\u1796\u1793\u17d2\u1799\u17b6\u1796\u17c1\u179b\u179a\u1799\u17c8\u1796\u17c1\u179b\u1781\u17d2\u179b\u17b8 (\u17a7\u1791\u17b6\u17a0\u179a\u178e\u17cd 10 \u00d7 I<sub>n<\/sub>, 0.4 \u179c\u17b7\u1793\u17b6\u1791\u17b8)<\/li>\n<li>\u1785\u179a\u1793\u17d2\u178f\u1780\u17c6\u17a0\u17bb\u179f\u1788\u17b6\u1793\u178a\u179b\u17cb 30 \u00d7 I<sub>n<\/sub> (3,000A \u179f\u1798\u17d2\u179a\u17b6\u1794\u17cb\u17a7\u1794\u1780\u179a\u178e\u17cd\u1794\u17c6\u1794\u17c2\u1780\u179f\u17c0\u1782\u17d2\u179c\u17b8 100A)<\/li>\n<li>\u1794\u17b7\u1791\u1794\u17be\u1780\u1791\u17c6\u1793\u17b6\u1780\u17cb\u1791\u17c6\u1793\u1784\u1785\u17d2\u179a\u17b6\u1793\u1785\u17c4\u179b \u1792\u17d2\u1793\u17bc\u1794\u1784\u17d2\u1780\u17be\u178f<\/li>\n<li>\u1790\u17b6\u1798\u1796\u179b\u1792\u17d2\u1793\u17bc\u1792\u17d2\u179c\u17be\u17b1\u17d2\u1799\u17a2\u17ca\u17b8\u1799\u17c9\u17bb\u1784\u179f\u1798\u17d2\u1797\u17b6\u179a\u17c8\u1794\u1784\u17d2\u1780\u17be\u178f\u17a7\u179f\u17d2\u1798\u17d0\u1793\u1793\u17c5\u1780\u17d2\u1793\u17bb\u1784\u1794\u1793\u17d2\u1791\u1794\u17cb\u1792\u17d2\u1793\u17bc<\/li>\n<li>\u1780\u17b6\u179a\u1780\u17be\u1793\u17a1\u17be\u1784\u179f\u1798\u17d2\u1796\u17b6\u1792\u178a\u17c6\u178e\u17be\u179a\u1780\u17b6\u179a\u1799\u1793\u17d2\u178f\u1780\u17b6\u179a\u1794\u1789\u17d2\u1785\u17c1\u1789\u1781\u17d2\u1799\u179b\u17cb\u1780\u17d2\u1793\u17bb\u1784\u179a\u1799\u17c8\u1796\u17c1\u179b 10-15 ms<\/li>\n<li>\u17a7\u1794\u1780\u179a\u178e\u17cd\u1794\u17c6\u1794\u17c2\u1780\u179f\u17c0\u1782\u17d2\u179c\u17b8\u1794\u17b7\u1791\u1794\u17be\u1780 <strong>\u178a\u17c4\u1799\u1798\u17b7\u1793\u1782\u17b7\u178f\u1796\u17b8\u1780\u17b6\u179a\u1780\u17c6\u178e\u178f\u17cb\u17a2\u1784\u17d2\u1782\u1797\u17b6\u1796\u1794\u1789\u17d2\u1785\u17c1\u1789\u17a2\u17c1\u17a1\u17b7\u1785\u178f\u17d2\u179a\u17bc\u1793\u17b7\u1785<\/strong><\/li>\n<\/ol>\n<table style=\"border-collapse: collapse; width: 100%; margin: 20px 0;\" border=\"1\" cellpadding=\"10\">\n<thead>\n<tr style=\"background-color: #f2f2f2;\">\n<th>\u1780\u1798\u17d2\u179a\u17b7\u178f\u1785\u179a\u1793\u17d2\u178f\u1780\u17c6\u17a0\u17bb\u179f<\/th>\n<th>\u1780\u17b6\u179a\u1786\u17d2\u179b\u17be\u1799\u178f\u1794 NSX<\/th>\n<th>\u1780\u17b6\u179a\u1786\u17d2\u179b\u17be\u1799\u178f\u1794 MCCB \u179f\u17d2\u178f\u1784\u17cb\u178a\u17b6\u179a<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>8 \u00d7 I<sub>n<\/sub><\/strong><\/td>\n<td>\u1798\u17bb\u1781\u1784\u17b6\u179a\u1780\u17b6\u179a\u1796\u1793\u17d2\u1799\u17b6\u1796\u17c1\u179b\u179a\u1799\u17c8\u1796\u17c1\u179b\u1781\u17d2\u179b\u17b8\u178a\u17c6\u178e\u17be\u179a\u1780\u17b6\u179a\u1792\u1798\u17d2\u1798\u178f\u17b6<\/td>\n<td>\u1798\u17bb\u1781\u1784\u17b6\u179a\u1780\u17b6\u179a\u1796\u1793\u17d2\u1799\u17b6\u1796\u17c1\u179b\u179a\u1799\u17c8\u1796\u17c1\u179b\u1781\u17d2\u179b\u17b8<\/td>\n<\/tr>\n<tr>\n<td><strong>15 \u00d7 I<sub>n<\/sub><\/strong><\/td>\n<td>\u1798\u17bb\u1781\u1784\u17b6\u179a\u1780\u17b6\u179a\u1796\u1793\u17d2\u1799\u17b6\u1796\u17c1\u179b\u179a\u1799\u17c8\u1796\u17c1\u179b\u1781\u17d2\u179b\u17b8 (\u1794\u17b7\u1791\u1794\u1793\u17d2\u1791\u17b6\u1793\u17cb)<\/td>\n<td>\u1780\u17b6\u179a\u1794\u1789\u17d2\u1785\u17c1\u1789\u1794\u1793\u17d2\u1791\u17b6\u1793\u17cb (\u1798\u17b7\u1793\u17a2\u17b6\u1785\u1794\u17b7\u1791\u1794\u17b6\u1793)<\/td>\n<\/tr>\n<tr>\n<td><strong>&gt; 25 \u00d7 I<sub>n<\/sub><\/strong><\/td>\n<td>\u1780\u17b6\u179a\u1794\u1789\u17d2\u1785\u17c1\u1789\u1790\u17b6\u1798\u1796\u179b\u178f\u17d2\u179a\u17bd\u178f\u179b\u17be\u1780\u17b6\u179a\u1796\u1793\u17d2\u1799\u17b6\u1796\u17c1\u179b<\/td>\n<td>\u1780\u17b6\u179a\u1785\u17d2\u179a\u17b6\u1793\u1785\u17c4\u179b\u1791\u17c6\u1793\u17b6\u1780\u17cb\u1791\u17c6\u1793\u1784 + \u1780\u17b6\u179a\u1794\u1789\u17d2\u1785\u17c1\u1789\u1794\u1793\u17d2\u1791\u17b6\u1793\u17cb<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u1780\u17b6\u179a\u179a\u1785\u1793\u17b6\u1793\u17c1\u17c7\u1780\u17b6\u179a\u1796\u17b6\u179a\u1780\u17b6\u179a\u1794\u179a\u17b6\u1787\u17d0\u1799\u178a\u17cf\u1798\u17a0\u1793\u17d2\u178f\u179a\u17b6\u1799\u1793\u17c5\u1796\u17c1\u179b\u178a\u17c2\u179b\u17a2\u17d2\u1793\u1780\u1794\u17d2\u179a\u17be\u1794\u17d2\u179a\u17b6\u179f\u17cb\u1780\u17c6\u178e\u178f\u17cb\u179a\u1785\u1793\u17b6\u179f\u1798\u17d2\u1796\u17d0\u1793\u17d2\u1792\u1780\u17b6\u179a\u1780\u17b6\u179a\u1796\u17b6\u179a\u1798\u17b7\u1793\u178f\u17d2\u179a\u17b9\u1798\u178f\u17d2\u179a\u17bc\u179c \u2014 MCCB \u1793\u17b9\u1784\u1780\u17b6\u179a\u1796\u17b6\u179a\u1781\u17d2\u179b\u17bd\u1793\u1787\u17b6\u1793\u17b7\u1785\u17d2\u1785\u1793\u17c5\u1780\u1798\u17d2\u179a\u17b7\u178f\u1780\u17c6\u17a0\u17bb\u179f\u1781\u17d2\u179b\u17b6\u17c6\u1784 \u1791\u17c4\u17c7\u1794\u17b8\u1787\u17b6\u179c\u17b6\u1792\u17d2\u179c\u17be\u17b1\u17d2\u1799\u1781\u17bc\u1785\u1780\u17b6\u179a\u1787\u17d2\u179a\u17be\u179f\u179a\u17be\u179f\u1780\u17cf\u178a\u17c4\u1799\u17d4.<\/p>\n<hr \/>\n<h2>\u1799\u17bb\u1791\u17d2\u1792\u179f\u17b6\u179f\u17d2\u178f\u17d2\u179a\u179f\u1798\u17d2\u179a\u1794\u179f\u1798\u17d2\u179a\u17bd\u179b\u1787\u17b6\u1780\u17cb\u179f\u17d2\u178f\u17c2\u1784<\/h2>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/Time-current-coordination-diagram-showing-ACB-and-MCCB-selectivity-zones-with-fault-scenario-analysis.webp\" alt=\"Time-current coordination diagram showing ACB and MCCB selectivity zones with fault scenario analysis - VIOX Electric\" \/><figcaption style=\"font-style: italic; color: #555; margin-top: 8px;\">\u1782\u17c6\u1793\u17bc\u179f\u178f\u17b6\u1784\u179f\u1798\u17d2\u179a\u1794\u179f\u1798\u17d2\u179a\u17bd\u179b\u1796\u17c1\u179b\u179c\u17c1\u179b\u17b6-\u1785\u179a\u1793\u17d2\u178f\u178a\u17c2\u179b\u1794\u1784\u17d2\u17a0\u17b6\u1789\u1796\u17b8\u178f\u17c6\u1794\u1793\u17cb\u1787\u17d2\u179a\u17be\u179f\u179a\u17be\u179f ACB \u1793\u17b7\u1784 MCCB \u1787\u17b6\u1798\u17bd\u1799\u1793\u17b9\u1784\u1780\u17b6\u179a\u179c\u17b7\u1797\u17b6\u1782\u179f\u17c1\u178e\u17b6\u179a\u17b8\u1799\u17c9\u17bc\u1780\u17c6\u17a0\u17bb\u179f \u2013 VIOX Electric<\/figcaption><\/figure>\n<h3>\u1799\u17bb\u1791\u17d2\u1792\u179f\u17b6\u179f\u17d2\u178f\u17d2\u179a\u1791\u17b8 1: Cascade ACB-to-MCCB (\u1794\u17b6\u1793\u178e\u17c2\u1793\u17b6\u17c6)<\/h3>\n<p><strong>\u1780\u17b6\u179a\u1780\u17c6\u178e\u178f\u17cb\u179a\u1785\u1793\u17b6\u179f\u1798\u17d2\u1796\u17d0\u1793\u17d2\u1792\u17d6<\/strong><\/p>\n<ul>\n<li><strong>\u1785\u17c6\u17a0\u17c0\u1784\u1781\u17b6\u1784\u179b\u17be<\/strong>\u17d6 1600A ACB, I<sub>cw<\/sub> = 65kA\/0.5s, \u1780\u17b6\u179a\u1796\u1793\u17d2\u1799\u17b6\u1796\u17c1\u179b\u179a\u1799\u17c8\u1796\u17c1\u179b\u1781\u17d2\u179b\u17b8 = 0.4s<\/li>\n<li><strong>\u1785\u17c6\u17a0\u17c0\u1784\u1781\u17b6\u1784\u1780\u17d2\u179a\u17c4\u1798<\/strong>\u17d6 400A MCCB, I<sub>Icu<\/sub> = 50kA, \u1794\u1793\u17d2\u1791\u17b6\u1793\u17cb = 5,000A (12.5 \u00d7 I<sub>n<\/sub>)<\/li>\n<\/ul>\n<p><strong>\u1780\u17b6\u179a\u179c\u17b7\u1797\u17b6\u1782\u179f\u1798\u17d2\u179a\u1794\u179f\u1798\u17d2\u179a\u17bd\u179b:<\/strong><\/p>\n<table style=\"border-collapse: collapse; width: 100%; margin: 20px 0;\" border=\"1\" cellpadding=\"10\">\n<thead>\n<tr style=\"background-color: #f2f2f2;\">\n<th>\u1791\u17b8\u178f\u17b6\u17c6\u1784\u1780\u17c6\u17a0\u17bb\u179f<\/th>\n<th>\u1785\u179a\u1793\u17d2\u178f\u1781\u17bb\u179f\u1794\u17d2\u179a\u1780\u17d2\u179a\u178f\u17b8<\/th>\n<th>\u179f\u1780\u1798\u17d2\u1798\u1797\u17b6\u1796 ACB \u1781\u17b6\u1784\u179b\u17be<\/th>\n<th>\u179f\u1780\u1798\u17d2\u1798\u1797\u17b6\u1796 MCCB \u1781\u17b6\u1784\u1780\u17d2\u179a\u17c4\u1798<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>\u17a7\u1794\u1780\u179a\u178e\u17cd\u1794\u1789\u17d2\u1785\u17bb\u1780\u1781\u17b6\u1784\u1780\u17d2\u179a\u17c4\u1798<\/strong><\/td>\n<td>8 kA<\/td>\n<td>\u179a\u1784\u17cb\u1785\u17b6\u17c6 0.4 \u179c\u17b7\u1793\u17b6\u1791\u17b8 (\u1780\u17d2\u1793\u17bb\u1784 I<sub>cw<\/sub>)<\/td>\n<td>\u1780\u17b6\u178f\u17cb\u1797\u17d2\u179b\u17b6\u1798\u17d7 (&gt;12.5\u00d7 I<sub>n<\/sub>)<\/td>\n<\/tr>\n<tr>\n<td><strong>\u17a7\u1794\u1780\u179a\u178e\u17cd\u1794\u1789\u17d2\u1785\u17bb\u1780\u1781\u17b6\u1784\u1780\u17d2\u179a\u17c4\u1798<\/strong><\/td>\n<td>45 kA<\/td>\n<td>\u179a\u1784\u17cb\u1785\u17b6\u17c6 0.4 \u179c\u17b7\u1793\u17b6\u1791\u17b8 (\u1780\u17d2\u1793\u17bb\u1784 I<sub>cw<\/sub>)<\/td>\n<td>\u1780\u17b6\u178f\u17cb\u1797\u17d2\u179b\u17b6\u1798\u17d7 (\u1780\u17c6\u178e\u178f\u17cb\u1785\u179a\u1793\u17d2\u178f)<\/td>\n<\/tr>\n<tr>\n<td><strong>\u1794\u17b6\u179a\u1798\u17c1<\/strong><\/td>\n<td>60 kA<\/td>\n<td>\u1780\u17b6\u178f\u17cb\u1794\u1793\u17d2\u1791\u17b6\u1794\u17cb\u1796\u17b8 0.4 \u179c\u17b7\u1793\u17b6\u1791\u17b8<\/td>\n<td>\u1798\u17b7\u1793\u1798\u17b6\u1793\u1795\u179b\u1794\u17c9\u17c7\u1796\u17b6\u179b\u17cb<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>\u179b\u1791\u17d2\u1792\u1795\u179b<\/strong>: \u1787\u17d2\u179a\u17be\u179f\u179a\u17be\u179f\u1796\u17c1\u1789\u179b\u17c1\u1789\u179a\u17a0\u17bc\u178f\u178a\u179b\u17cb 50kA (MCCB I<sub>Icu<\/sub> limit)<\/p>\n<h3>\u1799\u17bb\u1791\u17d2\u1792\u179f\u17b6\u179f\u17d2\u178f\u17d2\u179a\u1791\u17b8 2: \u179f\u1798\u17d2\u179a\u1794\u179f\u1798\u17d2\u179a\u17bd\u179b MCCB-\u1791\u17c5-MCCB (\u1798\u17b6\u1793\u1780\u1798\u17d2\u179a\u17b7\u178f)<\/h3>\n<p><strong>\u1780\u17b6\u179a\u1780\u17c6\u178e\u178f\u17cb\u179a\u1785\u1793\u17b6\u179f\u1798\u17d2\u1796\u17d0\u1793\u17d2\u1792\u17d6<\/strong><\/p>\n<ul>\n<li><strong>\u1785\u17c6\u17a0\u17c0\u1784\u1781\u17b6\u1784\u179b\u17be<\/strong>: 400A MCCB, \u1797\u17d2\u179b\u17b6\u1798\u17d7 = 5,000A (12.5\u00d7 I<sub>n<\/sub>)<\/li>\n<li><strong>\u1785\u17c6\u17a0\u17c0\u1784\u1781\u17b6\u1784\u1780\u17d2\u179a\u17c4\u1798<\/strong>: 100A MCCB, \u1797\u17d2\u179b\u17b6\u1798\u17d7 = 1,300A (13\u00d7 I<sub>n<\/sub>)<\/li>\n<\/ul>\n<p><strong>\u1780\u17b6\u179a\u179c\u17b7\u1797\u17b6\u1782\u179f\u1798\u17d2\u179a\u1794\u179f\u1798\u17d2\u179a\u17bd\u179b:<\/strong><\/p>\n<table style=\"border-collapse: collapse; width: 100%; margin: 20px 0;\" border=\"1\" cellpadding=\"10\">\n<thead>\n<tr style=\"background-color: #f2f2f2;\">\n<th>\u1785\u179a\u1793\u17d2\u178f\u1781\u17bb\u179f\u1794\u17d2\u179a\u1780\u17d2\u179a\u178f\u17b8<\/th>\n<th>MCCB \u1795\u17d2\u1793\u17c2\u1780\u1781\u17b6\u1784\u179b\u17be<\/th>\n<th>MCCB \u1795\u17d2\u1793\u17c2\u1780\u1781\u17b6\u1784\u1780\u17d2\u179a\u17c4\u1798<\/th>\n<th>\u17a2\u17b6\u1785\u1787\u17d2\u179a\u17be\u179f\u179a\u17be\u179f\u1794\u17b6\u1793?<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>1,500A<\/strong><\/td>\n<td>\u1797\u17b6\u1796\u1799\u17ba\u178f\u1799\u17c9\u17b6\u179c\u1781\u17d2\u179b\u17b8 (0.3 \u179c\u17b7\u1793\u17b6\u1791\u17b8)<\/td>\n<td>\u1780\u17b6\u179a\u1792\u17d2\u179c\u17be\u178a\u17c6\u178e\u17be\u179a\u1797\u17d2\u179b\u17b6\u1798\u17d7<\/td>\n<td>\u2705 \u1794\u17b6\u1791\/\u1785\u17b6\u179f<\/td>\n<\/tr>\n<tr>\n<td><strong>4,000A<\/strong><\/td>\n<td>\u1797\u17b6\u1796\u1799\u17ba\u178f\u1799\u17c9\u17b6\u179c\u1781\u17d2\u179b\u17b8 (0.3 \u179c\u17b7\u1793\u17b6\u1791\u17b8)<\/td>\n<td>\u1780\u17b6\u179a\u1792\u17d2\u179c\u17be\u178a\u17c6\u178e\u17be\u179a\u1797\u17d2\u179b\u17b6\u1798\u17d7<\/td>\n<td>\u2705 \u1794\u17b6\u1791\/\u1785\u17b6\u179f<\/td>\n<\/tr>\n<tr>\n<td><strong>6,000A<\/strong><\/td>\n<td><strong>\u1780\u17b6\u179a\u1792\u17d2\u179c\u17be\u178a\u17c6\u178e\u17be\u179a\u1797\u17d2\u179b\u17b6\u1798\u17d7<\/strong><\/td>\n<td>\u1780\u17b6\u179a\u1792\u17d2\u179c\u17be\u178a\u17c6\u178e\u17be\u179a\u1797\u17d2\u179b\u17b6\u1798\u17d7<\/td>\n<td>\u274c \u1791\u17c1 (\u1791\u17b6\u17c6\u1784\u1796\u17b8\u179a\u1780\u17b6\u178f\u17cb)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>\u1780\u17c6\u178e\u178f\u17cb\u1780\u17b6\u179a\u1787\u17d2\u179a\u17be\u179f\u179a\u17be\u179f<\/strong>: ~4,500A (90% \u1793\u17c3\u1780\u17b6\u179a\u1780\u17c6\u178e\u178f\u17cb\u1797\u17d2\u179b\u17b6\u1798\u17d7\u1795\u17d2\u1793\u17c2\u1780\u1781\u17b6\u1784\u179b\u17be)<\/p>\n<p><strong>\u1797\u17b6\u1796\u1794\u17d2\u179a\u179f\u17be\u179a\u17a1\u17be\u1784<\/strong>: \u1794\u17d2\u179a\u17be\u178f\u17b6\u179a\u17b6\u1784\u179f\u1798\u17d2\u179a\u1794\u179f\u1798\u17d2\u179a\u17bd\u179b\u179a\u1794\u179f\u17cb\u17a2\u17d2\u1793\u1780\u1795\u179b\u17b7\u178f\u178a\u17be\u1798\u17d2\u1794\u17b8\u1795\u17d2\u1791\u17c0\u1784\u1795\u17d2\u1791\u17b6\u178f\u17cb\u1790\u17b6\u1798\u1796\u179b\u17a2\u1793\u17bb\u1789\u17d2\u1789\u17b6\u178f\u1787\u17b6\u1780\u17cb\u179f\u17d2\u178f\u17c2\u1784\u2014MCCB \u178a\u17c2\u179b\u1780\u17c6\u178e\u178f\u17cb\u1785\u179a\u1793\u17d2\u178f\u17a2\u17b6\u1785\u1793\u17c5\u178f\u17c2\u179f\u1798\u17d2\u179a\u17c1\u1785\u1794\u17b6\u1793\u1793\u17bc\u179c\u1780\u17b6\u179a\u1787\u17d2\u179a\u17be\u179f\u179a\u17be\u179f\u1793\u17c5\u1780\u1798\u17d2\u179a\u17b7\u178f\u1780\u17c6\u17a0\u17bb\u179f\u1781\u17d2\u1796\u179f\u17cb\u1787\u17b6\u1784\u178f\u17b6\u1798\u179a\u1799\u17c8 I<sup>2<\/sup>t \u1780\u17b6\u179a\u179a\u17be\u179f\u17a2\u17be\u1784\u17d4.<\/p>\n<hr \/>\n<h2>\u178f\u17b6\u179a\u17b6\u1784\u1794\u17d2\u179a\u17c0\u1794\u1792\u17c0\u1794: \u179b\u1780\u17d2\u1781\u178e\u17c8\u1796\u17b7\u179f\u17c1\u179f\u179a\u1799\u17c8\u1796\u17c1\u179b\u1781\u17d2\u179b\u17b8 ACB vs. MCCB<\/h2>\n<table style=\"border-collapse: collapse; width: 100%; margin: 20px 0;\" border=\"1\" cellpadding=\"10\">\n<thead>\n<tr style=\"background-color: #f2f2f2;\">\n<th>\u179b\u1780\u17d2\u1781\u178e\u17c8<\/th>\n<th>ACB (\u1794\u17d2\u179a\u1797\u17c1\u1791 B)<\/th>\n<th>MCCB (\u1794\u17d2\u179a\u1797\u17c1\u1791 A)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>\u1781\u17d2\u1789\u17bb\u17c6<sub>cw<\/sub> \u179f\u17c1\u1785\u1780\u17d2\u178f\u17b8\u1794\u17d2\u179a\u1780\u17b6\u179f<\/strong><\/td>\n<td>\u2705 \u1794\u17b6\u1791\/\u1785\u17b6\u179f (30-85 kA, 0.05-1.0 \u179c\u17b7\u1793\u17b6\u1791\u17b8)<\/td>\n<td>\u274c \u1791\u17c1 (\u1798\u17b7\u1793\u1794\u17b6\u1793\u1794\u17d2\u179a\u1780\u17b6\u179f)<\/td>\n<\/tr>\n<tr>\n<td><strong>\u1792\u1793\u17cb\u1791\u17d2\u179a\u17b6\u17c6\u1796\u17b8\u1792\u1798\u17d2\u1798\u1787\u17b6\u178f\u17b7<\/strong><\/td>\n<td>\u1781\u17d2\u1796\u179f\u17cb\u178e\u17b6\u179f\u17cb (&gt;50\u00d7 I<sub>n<\/sub>)<\/td>\n<td>\u1798\u17b6\u1793\u1780\u1798\u17d2\u179a\u17b7\u178f (12-14\u00d7 I<sub>n<\/sub>)<\/td>\n<\/tr>\n<tr>\n<td><strong>\u179f\u1798\u17d2\u1796\u17b6\u1792\u179f\u17d2\u1794\u30d7\u30ea\u30f3\u30b0\u1791\u17c6\u1793\u17b6\u1780\u17cb\u1791\u17c6\u1793\u1784<\/strong><\/td>\n<td>\u1781\u17d2\u1796\u179f\u17cb (\u1780\u17b6\u179a\u1796\u17b6\u179a\u1780\u17b6\u179a\u1785\u17d2\u179a\u17b6\u1793\u1785\u17c4\u179b)<\/td>\n<td>\u1791\u17b6\u1794 (\u1794\u17be\u1780\u178a\u17c6\u178e\u17be\u179a\u1780\u17b6\u179a\u1780\u17c6\u178e\u178f\u17cb\u1785\u179a\u1793\u17d2\u178f)<\/td>\n<\/tr>\n<tr>\n<td><strong>\u1780\u17b6\u179a\u200b\u178a\u17b6\u1785\u17cb\u200b\u1785\u179a\u1793\u17d2\u178f\u200b\u1797\u17d2\u179b\u17b6\u1798\u17d7<\/strong><\/td>\n<td>\u17a2\u17b6\u1785\u178f\u17d2\u179a\u17bc\u179c\u1794\u17b6\u1793\u1794\u17b7\u1791<\/td>\n<td>\u1787\u17b6\u1792\u1798\u17d2\u1798\u178f\u17b6\u1787\u17bd\u179f\u1787\u17bb\u179b (\u1798\u17b7\u1793\u17a2\u17b6\u1785\u1794\u17b7\u1791\u1794\u17b6\u1793)<\/td>\n<\/tr>\n<tr>\n<td><strong>\u1787\u17bd\u179a\u1796\u1793\u17d2\u1799\u17b6\u1796\u17c1\u179b\u1781\u17d2\u179b\u17b8<\/strong><\/td>\n<td>0.05-1.0 \u179c\u17b7\u1793\u17b6\u1791\u17b8 (\u17a2\u17b6\u1785\u179b\u17c3\u178f\u1798\u17d2\u179a\u17bc\u179c\u1794\u17b6\u1793)<\/td>\n<td>0.1-0.5 \u179c\u17b7\u1793\u17b6\u1791\u17b8 (\u178f\u17c2\u1781\u17b6\u1784\u1780\u17d2\u179a\u17c4\u1798\u1780\u1798\u17d2\u179a\u17b7\u178f\u1797\u17d2\u179b\u17b6\u1798\u17d7)<\/td>\n<\/tr>\n<tr>\n<td><strong>\u179c\u17b7\u1792\u17b8\u179f\u17b6\u179f\u17d2\u179a\u17d2\u178f\u179f\u1798\u17d2\u179a\u1794\u179f\u1798\u17d2\u179a\u17bd\u179b<\/strong><\/td>\n<td>\u1795\u17d2\u17a2\u17c2\u1780\u179b\u17be\u1796\u17c1\u179b\u179c\u17c1\u179b\u17b6 (\u1780\u17b6\u179a\u1796\u1793\u17d2\u1799\u17b6\u1796\u17c1\u179b\u1796\u17b7\u178f\u1794\u17d2\u179a\u17b6\u1780\u178a)<\/td>\n<td>\u1795\u17d2\u17a2\u17c2\u1780\u179b\u17be\u1785\u179a\u1793\u17d2\u178f (\u178a\u17c2\u1793\u1780\u17c6\u178e\u178f\u17cb + \u1796\u1793\u17d2\u1799\u17b6\u1796\u17c1\u179b)<\/td>\n<\/tr>\n<tr>\n<td><strong>\u179c\u17b7\u1792\u17b8\u1792\u1798\u17d2\u1798\u178f\u17b6<\/strong><\/td>\n<td>\u17a2\u17d2\u1793\u1780\u1794\u1789\u17d2\u1785\u17bc\u179b\u1798\u17c1 (1000-6300A)<\/td>\n<td>\u1780\u17b6\u179a\u1780\u17b6\u179a\u1796\u17b6\u179a\u17a7\u1794\u1780\u179a\u178e\u17cd\u1794\u1789\u17d2\u1787\u17bc\u1793 (16-1600A)<\/td>\n<\/tr>\n<tr>\n<td><strong>\u1787\u17d2\u179a\u17be\u179f\u179a\u17be\u179f\u1787\u17b6\u1798\u17bd\u1799\u1795\u17d2\u1793\u17c2\u1780\u1781\u17b6\u1784\u1780\u17d2\u179a\u17c4\u1798<\/strong><\/td>\n<td>\u1796\u17c1\u1789\u179b\u17c1\u1789 (\u179a\u17a0\u17bc\u178f\u178a\u179b\u17cb I<sub>cw<\/sub>)<\/td>\n<td>\u1795\u17d2\u1793\u17c2\u1780\u1781\u17d2\u179b\u17c7 (\u179a\u17a0\u17bc\u178f\u178a\u179b\u17cb\u1780\u1798\u17d2\u179a\u17b7\u178f\u1797\u17d2\u179b\u17b6\u1798\u17d7)<\/td>\n<\/tr>\n<tr>\n<td><strong>\u1799\u1793\u17d2\u178f\u1780\u17b6\u179a\u1780\u17b6\u179a\u1796\u17b6\u179a\u1781\u17d2\u179b\u17bd\u1793<\/strong><\/td>\n<td>\u1798\u17c9\u17b6\u179f\u17cb\u1780\u1798\u17d2\u178a\u17c5 + \u1780\u1798\u17d2\u179b\u17b6\u17c6\u1784\u1798\u17c1\u1780\u17b6\u1793\u17b7\u1785<\/td>\n<td>\u1780\u17b6\u179a\u1785\u17d2\u179a\u17b6\u1793\u1785\u17c4\u179b\u1791\u17c6\u1793\u17b6\u1780\u17cb\u1791\u17c6\u1793\u1784 + \u1780\u17b6\u179a\u1780\u17c6\u178e\u178f\u17cb\u1792\u17d2\u1793\u17bc<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<h2>\u17a0\u17c1\u178f\u17bb\u17a2\u17d2\u179c\u17b8\u1794\u17b6\u1793\u1787\u17b6\u1794\u1789\u17d2\u17a0\u17b6\u1793\u17c1\u17c7\u179f\u17c6\u1781\u17b6\u1793\u17cb\u179f\u1798\u17d2\u179a\u17b6\u1794\u17cb\u1780\u17b6\u179a\u179a\u1785\u1793\u1794\u17d2\u179a\u1796\u17d0\u1793\u17d2\u1792<\/h2>\n<h3>\u1780\u17b6\u179a\u1799\u179b\u17cb\u1781\u17bb\u179f\u1791\u17b8 1: \u201c\u1780\u17b6\u179a\u1796\u1793\u17d2\u1799\u17b6\u1796\u17c1\u179b\u1781\u17d2\u179b\u17b8 MCCB = \u1780\u17b6\u179a\u1796\u1793\u17d2\u1799\u17b6\u1796\u17c1\u179b\u1781\u17d2\u179b\u17b8 ACB\u201d<\/h3>\n<p><strong>\u1780\u17b6\u179a\u1796\u17b7\u178f<\/strong>: \u1780\u17b6\u179a\u1796\u1793\u17d2\u1799\u17b6\u1796\u17c1\u179b\u1781\u17d2\u179b\u17b8 MCCB \u178a\u17c6\u178e\u17be\u179a\u1780\u17b6\u179a\u178f\u17c2\u1793\u17c5\u1780\u17d2\u1793\u17bb\u1784\u1794\u1784\u17d2\u17a2\u17bd\u1785\u1785\u179a\u1793\u17d2\u178f\u178f\u17bc\u1785\u1785\u1784\u17d2\u17a2\u17c0\u178f\u1794\u17c9\u17bb\u178e\u17d2\u178e\u17c4\u17c7 (\u179a\u179c\u17b6\u1784\u1780\u1798\u17d2\u179a\u17b7\u178f\u1799\u17bc\u179a \u1793\u17b7\u1784\u1797\u17d2\u179b\u17b6\u1798\u17d7)\u17d4 \u1785\u17c6\u1796\u17c4\u17c7\u1780\u17c6\u17a0\u17bb\u179f\u178a\u17c2\u179b\u179b\u17be\u179f\u1796\u17b8\u1780\u17b6\u179a\u1780\u17c6\u178e\u178f\u17cb\u1797\u17d2\u179b\u17b6\u1798\u17d7 MCCB \u1780\u17b6\u178f\u17cb\u1797\u17d2\u179b\u17b6\u1798\u17d7\u2014\u1798\u17b7\u1793\u1798\u17b6\u1793\u1780\u17b6\u179a\u1796\u1793\u17d2\u1799\u17b6\u1796\u17c1\u179b\u1780\u17be\u178f\u17a1\u17be\u1784\u1791\u17c1\u17d4.<\/p>\n<p><strong>\u1795\u179b\u1794\u17c9\u17c7\u1796\u17b6\u179b\u17cb\u1793\u17c3\u1780\u17b6\u179a\u179a\u1785\u1793\u17b6<\/strong>: \u1793\u17c5\u1796\u17c1\u179b\u1794\u1789\u17d2\u1787\u17b6\u1780\u17cb\u1780\u17b6\u179a\u1780\u17b6\u179a\u1796\u17b6\u179a MCCB \u178f\u17d2\u179a\u17bc\u179c\u1795\u17d2\u1791\u17c0\u1784\u1795\u17d2\u1791\u17b6\u178f\u17cb\u1787\u17b6\u1793\u17b7\u1785\u17d2\u1785:<\/p>\n<ol>\n<li>\u1780\u17b6\u179a\u1780\u17c6\u178e\u178f\u17cb\u1797\u17d2\u179b\u17b6\u1798\u17d7\u1793\u17c3\u17a7\u1794\u1780\u179a\u178e\u17cd\u1795\u17d2\u1793\u17c2\u1780\u1781\u17b6\u1784\u1780\u17d2\u179a\u17c4\u1798<\/li>\n<li>\u1785\u179a\u1793\u17d2\u178f\u1780\u17c6\u17a0\u17bb\u179f\u17a2\u178f\u17b7\u1794\u179a\u1798\u17b6\u1793\u17c5\u1785\u17c6\u178e\u17bb\u1785\u179f\u1798\u17d2\u179a\u1794\u179f\u1798\u17d2\u179a\u17bd\u179b<\/li>\n<li>\u1790\u17b6\u178f\u17be\u1785\u179a\u1793\u17d2\u178f\u1780\u17c6\u17a0\u17bb\u179f\u1793\u17b9\u1784\u179b\u17be\u179f\u1796\u17b8\u1780\u1798\u17d2\u179a\u17b7\u178f\u1797\u17d2\u179b\u17b6\u1798\u17d7 MCCB \u1795\u17d2\u1793\u17c2\u1780\u1781\u17b6\u1784\u179b\u17be<\/li>\n<\/ol>\n<h3>\u1780\u17b6\u179a\u1799\u179b\u17cb\u1781\u17bb\u179f\u1791\u17b8 2: \u201c\u1782\u17d2\u1798\u17b6\u1793 I<sub>cw<\/sub> Rating = \u1782\u17d2\u1798\u17b6\u1793\u179f\u1798\u178f\u17d2\u1790\u1797\u17b6\u1796\u179a\u1799\u17c8\u1796\u17c1\u179b\u1781\u17d2\u179b\u17b8\u201d<\/h3>\n<p><strong>\u1780\u17b6\u179a\u1796\u17b7\u178f<\/strong>: MCCB \u1798\u17b6\u1793\u1797\u17b6\u1796\u1792\u1793\u17cb\u1791\u17d2\u179a\u17b6\u17c6\u179a\u1799\u17c8\u1796\u17c1\u179b\u1781\u17d2\u179b\u17b8\u1796\u17b8\u1792\u1798\u17d2\u1798\u1787\u17b6\u178f\u17b7\u179a\u17a0\u17bc\u178f\u178a\u179b\u17cb\u1780\u1798\u17d2\u179a\u17b7\u178f\u1785\u17d2\u179a\u17b6\u1793\u1785\u17c4\u179b\u1791\u17c6\u1793\u17b6\u1780\u17cb\u1791\u17c6\u1793\u1784\u179a\u1794\u179f\u17cb\u1796\u17bd\u1780\u1782\u17c1 (~12-14\u00d7 I<sub>n<\/sub>) \u17d4 \u179f\u1798\u178f\u17d2\u1790\u1797\u17b6\u1796\u1793\u17c1\u17c7\u1794\u17be\u1780\u179b\u1791\u17d2\u1792\u1797\u17b6\u1796\u179f\u1798\u17d2\u179a\u1794\u179f\u1798\u17d2\u179a\u17bd\u179b\u1798\u17b6\u1793\u1780\u1798\u17d2\u179a\u17b7\u178f\u1787\u17b6\u1798\u17bd\u1799\u17a7\u1794\u1780\u179a\u178e\u17cd\u1795\u17d2\u1793\u17c2\u1780\u1781\u17b6\u1784\u1780\u17d2\u179a\u17c4\u1798 \u1791\u17c4\u17c7\u1794\u17b8\u1787\u17b6\u1798\u17b7\u1793\u178a\u179b\u17cb\u1780\u1798\u17d2\u179a\u17b7\u178f\u1793\u17c3 ACB \u1780\u17cf\u178a\u17c4\u1799\u17d4.<\/p>\n<p><strong>\u1795\u179b\u1794\u17c9\u17c7\u1796\u17b6\u179b\u17cb\u1793\u17c3\u1780\u17b6\u179a\u179a\u1785\u1793\u17b6<\/strong>: \u1780\u17b6\u179a\u179f\u1798\u17d2\u179a\u1794\u179f\u1798\u17d2\u179a\u17bd\u179b MCCB-\u1791\u17c5-MCCB \u1782\u17ba\u17a2\u17b6\u1785\u1792\u17d2\u179c\u17be\u1791\u17c5\u1794\u17b6\u1793 \u1794\u17c9\u17bb\u1793\u17d2\u178f\u17c2\u178f\u1798\u17d2\u179a\u17bc\u179c\u17b1\u17d2\u1799\u1798\u17b6\u1793:<\/p>\n<ul>\n<li>\u1780\u17b6\u179a\u1794\u17c6\u1794\u17c2\u1780\u1780\u17b6\u179a\u1780\u17c6\u178e\u178f\u17cb\u1797\u17d2\u179b\u17b6\u1798\u17d7\u178a\u17c4\u1799\u1794\u17d2\u179a\u17bb\u1784\u1794\u17d2\u179a\u1799\u17d0\u178f\u17d2\u1793 (\u179f\u1798\u17b6\u1798\u17b6\u178f\u17d2\u179a\u17a2\u1794\u17d2\u1794\u1794\u179a\u1798\u17b6 1.5:1)<\/li>\n<li>\u178f\u17b6\u179a\u17b6\u1784\u1787\u17d2\u179a\u17be\u179f\u179a\u17be\u179f\u178a\u17c2\u179b\u1795\u17d2\u178f\u179b\u17cb\u178a\u17c4\u1799\u1780\u17d2\u179a\u17bb\u1798\u17a0\u17ca\u17bb\u1793\u1795\u179b\u17b7\u178f<\/li>\n<li>\u1780\u17b6\u179a\u1796\u17b7\u1785\u17b6\u179a\u178e\u17b6\u179b\u17be\u17a5\u1791\u17d2\u1792\u17b7\u1796\u179b\u1780\u17c6\u178e\u178f\u17cb\u1785\u179a\u1793\u17d2\u178f\u179b\u17be\u1790\u17b6\u1798\u1796\u179b\u1786\u17d2\u179b\u1784\u1780\u17b6\u178f\u17cb<\/li>\n<\/ul>\n<h3>\u1780\u17b6\u179a\u1799\u179b\u17cb\u1781\u17bb\u179f\u1791\u17b8 3: \u201c\u1780\u17b6\u179a\u1794\u17b7\u1791\u178a\u17c6\u178e\u17be\u179a\u1780\u17b6\u179a Instantaneous Trip \u1792\u17d2\u179c\u17be\u17b1\u17d2\u1799 MCCB = ACB\u201d<\/h3>\n<p><strong>\u1780\u17b6\u179a\u1796\u17b7\u178f<\/strong>\u17d6 \u179f\u17bc\u1798\u17d2\u1794\u17b8\u178f\u17c2 MCCB \u178a\u17c2\u179b\u1798\u17b6\u1793 instantaneous trip \u178a\u17c2\u179b\u17a2\u17b6\u1785\u1780\u17c2\u1794\u17d2\u179a\u17c2\u1794\u17b6\u1793 (\u17a7\u1791\u17b6\u17a0\u179a\u178e\u17cd NSX) \u179a\u17bd\u1798\u1794\u1789\u17d2\u1785\u17bc\u179b\u1799\u1793\u17d2\u178f\u1780\u17b6\u179a\u178f\u17d2\u179a\u17bd\u178f\u1796\u17b7\u1793\u17b7\u178f\u17d2\u1799\u1795\u17d2\u17a2\u17c2\u1780\u179b\u17be\u1790\u17b6\u1798\u1796\u179b\u178a\u17c2\u179b\u1794\u1784\u17d2\u1781\u17c6\u17b1\u17d2\u1799\u178a\u17b6\u1785\u17cb\u1793\u17c5\u1780\u1798\u17d2\u179a\u17b7\u178f\u1780\u17c6\u17a0\u17bb\u179f\u1781\u17d2\u179b\u17b6\u17c6\u1784 (&gt;25\u00d7 I<sub>n<\/sub>)\u17d4 \u1796\u17bd\u1780\u179c\u17b6\u1798\u17b7\u1793\u17a2\u17b6\u1785 \u201c\u179a\u1784\u17cb\u1785\u17b6\u17c6\u201d \u1785\u179a\u1793\u17d2\u178f\u1780\u17c6\u17a0\u17bb\u179f\u1781\u17d2\u1796\u179f\u17cb\u178a\u17bc\u1785 ACBs \u1791\u17c1\u17d4.<\/p>\n<p><strong>\u1795\u179b\u1794\u17c9\u17c7\u1796\u17b6\u179b\u17cb\u1793\u17c3\u1780\u17b6\u179a\u179a\u1785\u1793\u17b6<\/strong>\u17d6 \u1793\u17c5\u1796\u17c1\u179b\u1794\u17d2\u179a\u17be MCCB \u1787\u17b6\u1798\u17bd\u1799\u1793\u17b9\u1784 instantaneous \u178a\u17c2\u179b\u17a2\u17b6\u1785\u179b\u17c3\u178f\u1798\u17d2\u179a\u17bc\u179c\u1794\u17b6\u1793\u17d6<\/p>\n<ul>\n<li>\u1795\u17d2\u1791\u17c0\u1784\u1795\u17d2\u1791\u17b6\u178f\u17cb\u1780\u1798\u17d2\u179a\u17b7\u178f\u1780\u17c6\u178e\u178f\u17cb\u1790\u17b6\u1798\u1796\u179b\u1787\u17b6\u1798\u17bd\u1799\u1780\u17d2\u179a\u17bb\u1798\u17a0\u17ca\u17bb\u1793\u1795\u179b\u17b7\u178f<\/li>\n<li>\u1780\u17bb\u17c6\u179f\u1793\u17d2\u1798\u178f\u1790\u17b6\u1798\u17b6\u1793\u17a5\u179a\u17b7\u1799\u17b6\u1794\u1790\u178a\u17bc\u1785 ACB \u1793\u17c5\u1785\u179a\u1793\u17d2\u178f\u1780\u17c6\u17a0\u17bb\u179f\u178a\u17c2\u179b\u1781\u17b7\u178f\u1787\u17b7\u178f I<sub>Icu<\/sub><\/li>\n<li>\u1796\u17b7\u1785\u17b6\u179a\u178e\u17b6\u179b\u17be\u1795\u179b\u1794\u17c9\u17c7\u1796\u17b6\u179b\u17cb\u1793\u17c3\u1790\u17b6\u1798\u1796\u179b arc flash \u1793\u17c3\u1780\u17b6\u179a\u178a\u17b6\u1785\u17cb\u1785\u179a\u1793\u17d2\u178f\u1799\u17ba\u178f<\/li>\n<\/ul>\n<hr \/>\n<h2>\u178f\u17c6\u178e\u1797\u17d2\u1787\u17b6\u1794\u17cb\u1781\u17b6\u1784\u1780\u17d2\u1793\u17bb\u1784 \u1793\u17b7\u1784\u1792\u1793\u1792\u17b6\u1793\u178a\u17c2\u179b\u1791\u17b6\u1780\u17cb\u1791\u1784<\/h2>\n<p>\u179f\u1798\u17d2\u179a\u17b6\u1794\u17cb\u200b\u1780\u17b6\u179a\u200b\u1799\u179b\u17cb\u200b\u178a\u17b9\u1784\u200b\u1780\u17b6\u1793\u17cb\u200b\u178f\u17c2\u200b\u179f\u17ca\u17b8\u200b\u1787\u1798\u17d2\u179a\u17c5\u200b\u17a2\u17c6\u1796\u17b8\u200b\u1782\u17c6\u1793\u17b7\u178f\u200b\u1780\u17b6\u179a\u1796\u17b6\u179a\u200b\u178a\u17c2\u179b\u200b\u1791\u17b6\u1780\u17cb\u1791\u1784 \u179f\u17bc\u1798\u200b\u179f\u17d2\u179c\u17c2\u1784\u200b\u1799\u179b\u17cb\u200b\u1780\u17b6\u179a\u200b\u178e\u17c2\u1793\u17b6\u17c6\u200b\u1794\u1785\u17d2\u1785\u17c1\u1780\u1791\u17c1\u179f VIOX \u1791\u17b6\u17c6\u1784\u200b\u1793\u17c1\u17c7\u17d6<\/p>\n<ul>\n<li><a href=\"https:\/\/test.viox.com\/km\/electrical-derating-temperature-altitude-grouping-factors\/\"><strong>\u1780\u17b6\u179a\u1780\u17b6\u178f\u17cb\u1794\u1793\u17d2\u1790\u1799\u17a2\u1782\u17d2\u1782\u17b7\u179f\u1793\u17b8\u17d6 \u179f\u17b8\u178f\u17bb\u178e\u17d2\u17a0\u1797\u17b6\u1796 \u1780\u1798\u17d2\u1796\u179f\u17cb \u1793\u17b7\u1784\u1780\u178f\u17d2\u178f\u17b6\u1785\u17c2\u1780\u1787\u17b6\u1780\u17d2\u179a\u17bb\u1798<\/strong><\/a> \u2013 \u179f\u17d2\u179c\u17c2\u1784\u1799\u179b\u17cb\u1796\u17b8\u179a\u1794\u17c0\u1794\u178a\u17c2\u179b\u1780\u178f\u17d2\u178f\u17b6\u1794\u179a\u17b7\u179f\u17d2\u1790\u17b6\u1793\u1794\u17c9\u17c7\u1796\u17b6\u179b\u17cb\u178a\u179b\u17cb\u1780\u17b6\u179a\u179c\u17b6\u1799\u178f\u1798\u17d2\u179b\u17c3\u1785\u179a\u1793\u17d2\u178f \u1793\u17b7\u1784\u1780\u17b6\u179a\u179f\u1798\u17d2\u179a\u1794\u179f\u1798\u17d2\u179a\u17bd\u179b\u179a\u1794\u179f\u17cb breaker<\/li>\n<li><a href=\"https:\/\/test.viox.com\/km\/ats-circuit-breaker-coordination-guide-icw-selectivity\/\"><strong>\u1798\u1782\u17d2\u1782\u17bb\u1791\u17d2\u1791\u17c1\u179f\u1780\u17cd ATS &amp; Circuit Breaker Coordination: I<sub>cw<\/sub> &amp; Selectivity \u1794\u17b6\u1793\u1796\u1793\u17d2\u1799\u179b\u17cb<\/strong><\/a> \u2013 \u1780\u17b6\u179a\u179c\u17b7\u1797\u17b6\u1782\u179b\u1798\u17d2\u17a2\u17b7\u178f\u1793\u17c3\u1780\u17b6\u179a\u179f\u1798\u17d2\u179a\u1794\u179f\u1798\u17d2\u179a\u17bd\u179b\u1794\u17d2\u179a\u1797\u17c1\u1791 A \u1791\u179b\u17cb\u1793\u17b9\u1784 B \u1793\u17c5\u1780\u17d2\u1793\u17bb\u1784\u1780\u1798\u17d2\u1798\u179c\u17b7\u1792\u17b8\u1794\u17d2\u178f\u17bc\u179a\u1795\u17d2\u1791\u17c1\u179a\u178a\u17c4\u1799\u179f\u17d2\u179c\u17d0\u1799\u1794\u17d2\u179a\u179c\u178f\u17d2\u178f\u17b7<\/li>\n<li><a href=\"https:\/\/test.viox.com\/km\/current-limiting-circuit-breaker-guide\/\"><strong>\u9650\u6d41\u65ad\u8def\u5668\u6307\u5357\uff1a\u4fdd\u62a4\u529f\u80fd\u4e0e\u6280\u672f\u89c4\u683c<\/strong><\/a> \u2013 \u1787\u17d2\u179a\u1798\u17bb\u1787\u1791\u17b9\u1780\u1787\u17d2\u179a\u17c5\u1791\u17c5\u1780\u17d2\u1793\u17bb\u1784\u179a\u17bc\u1794\u179c\u17b7\u1791\u17d2\u1799\u17b6\u1793\u17c3\u1780\u17b6\u179a\u1785\u17d2\u179a\u17b6\u1793\u1785\u17c4\u179b\u17a2\u17c1\u17a1\u17b7\u1785\u178f\u17d2\u179a\u17bc\u1798\u17c9\u17b6\u1789\u17c9\u17c1\u1791\u17b7\u1785 \u1793\u17b7\u1784 I<sup>2<\/sup>\u1780\u17b6\u179a\u1780\u17c6\u178e\u178f\u17cb t<\/li>\n<li><a href=\"https:\/\/test.viox.com\/km\/types-of-circuit-breakers\/\"><strong>\u1794\u17d2\u179a\u1797\u17c1\u1791\u1793\u17c3\u17a7\u1794\u1780\u179a\u178e\u17cd\u1794\u17c6\u179b\u17c2\u1784\u179f\u17c0\u1782\u17d2\u179c\u17b8\u17d6 \u1798\u1782\u17d2\u1782\u17bb\u1791\u17d2\u1791\u17c1\u179f\u1780\u17cd\u1785\u17c6\u178e\u17b6\u178f\u17cb\u1790\u17d2\u1793\u17b6\u1780\u17cb\u1796\u17c1\u1789\u179b\u17c1\u1789<\/strong><\/a> \u2013 \u1791\u17b7\u178a\u17d2\u178b\u1797\u17b6\u1796\u1791\u17bc\u1791\u17c5\u178a\u17cf\u1791\u17bc\u179b\u17c6\u1791\u17bc\u179b\u17b6\u1799\u1793\u17c3\u1797\u17b6\u1796\u1781\u17bb\u179f\u1782\u17d2\u1793\u17b6\u179a\u179c\u17b6\u1784 ACB, MCCB, MCB \u1793\u17b7\u1784\u1780\u1798\u17d2\u1798\u179c\u17b7\u1792\u17b8<\/li>\n<li><a href=\"https:\/\/test.viox.com\/km\/commercial-ev-charging-protection-guide-acb-mccb-rcbo\/\"><strong>\u1798\u1782\u17d2\u1782\u17bb\u1791\u17d2\u1791\u17c1\u179f\u1780\u17cd\u1780\u17b6\u179a\u1796\u17b6\u179a\u1780\u17b6\u179a\u179f\u17b6\u1780 EV \u179f\u1798\u17d2\u179a\u17b6\u1794\u17cb\u1796\u17b6\u178e\u17b7\u1787\u17d2\u1787\u1780\u1798\u17d2\u1798\u17d6 ACB, MCCB &amp; Type B RCBOs<\/strong><\/a> \u2013 \u17a7\u1791\u17b6\u17a0\u179a\u178e\u17cd\u1793\u17c3\u1780\u17b6\u179a\u179f\u1798\u17d2\u179a\u1794\u179f\u1798\u17d2\u179a\u17bd\u179b\u1787\u17b6\u1780\u17cb\u179f\u17d2\u178f\u17c2\u1784\u1787\u17b6\u1798\u17bd\u1799\u1793\u17b9\u1784\u1780\u17b6\u179a\u1782\u178e\u1793\u17b6\u1794\u1793\u17d2\u1791\u17bb\u1780<\/li>\n<\/ul>\n<hr \/>\n<h2>\u179f\u17c6\u178e\u17bd\u179a\u178a\u17c2\u179b\u1782\u17c1\u179f\u17bd\u179a\u1789\u17b9\u1780\u1789\u17b6\u1794\u17cb\u17d6 \u1780\u17b6\u179a\u1780\u17b6\u179a\u1796\u17b6\u179a\u179a\u1799\u17c8\u1796\u17c1\u179b\u1781\u17d2\u179b\u17b8 MCCB<\/h2>\n<h3>\u179f\u17c6\u178e\u17bd\u179a\u1791\u17b8 1: \u178f\u17be\u1781\u17d2\u1789\u17bb\u17c6\u17a2\u17b6\u1785\u1794\u17d2\u179a\u17be MCCB \u1787\u17b6 main incomer \u1787\u17c6\u1793\u17bd\u179f\u17b1\u17d2\u1799 ACB \u1794\u17b6\u1793\u1791\u17c1?<\/h3>\n<p><strong>\u1798\u17bd\u1799<\/strong>\u17d6 \u17a2\u17b6\u1785\u1792\u17d2\u179c\u17be\u1791\u17c5\u1794\u17b6\u1793 \u1794\u17c9\u17bb\u1793\u17d2\u178f\u17c2\u1798\u17b7\u1793\u178f\u17d2\u179a\u17bc\u179c\u1794\u17b6\u1793\u178e\u17c2\u1793\u17b6\u17c6\u179f\u1798\u17d2\u179a\u17b6\u1794\u17cb\u1794\u17d2\u179a\u1796\u17d0\u1793\u17d2\u1792\u178a\u17c2\u179b\u178f\u17d2\u179a\u17bc\u179c\u1780\u17b6\u179a selectivity \u1796\u17c1\u1789\u179b\u17c1\u1789\u1791\u17c1\u17d4 MCCB \u1781\u17d2\u179c\u17c7\u1780\u17b6\u179a\u1794\u17d2\u179a\u1780\u17b6\u179f I<sub>cw<\/sub> ratings \u178a\u17bc\u1785\u17d2\u1793\u17c1\u17c7\u1796\u17bd\u1780\u179c\u17b6\u1798\u17b7\u1793\u17a2\u17b6\u1785\u1796\u1793\u17d2\u1799\u17b6\u1796\u17c1\u179b\u1780\u17b6\u179a\u178a\u17b6\u1785\u17cb\u1785\u179a\u1793\u17d2\u178f\u179f\u1798\u17d2\u179a\u17b6\u1794\u17cb\u1780\u17b6\u179a\u179f\u1798\u17d2\u179a\u1794\u179f\u1798\u17d2\u179a\u17bd\u179b downstream \u1793\u17c5\u1785\u179a\u1793\u17d2\u178f\u1780\u17c6\u17a0\u17bb\u179f\u1781\u17d2\u1796\u179f\u17cb (&gt;10\u00d7 I<sub>n<\/sub>) \u1794\u17b6\u1793\u1791\u17c1\u17d4 \u1794\u17d2\u179a\u17be ACBs \u179f\u1798\u17d2\u179a\u17b6\u1794\u17cb main incomers \u1793\u17c5\u1780\u17d2\u1793\u17bb\u1784\u179a\u17c4\u1784\u1785\u1780\u17d2\u179a\u17a7\u179f\u17d2\u179f\u17b6\u17a0\u1780\u1798\u17d2\u1798\u178a\u17c2\u179b selectivity \u1798\u17b6\u1793\u179f\u17b6\u179a\u17c8\u179f\u17c6\u1781\u17b6\u1793\u17cb \u17ac\u1795\u17d2\u1791\u17c0\u1784\u1795\u17d2\u1791\u17b6\u178f\u17cb\u178a\u17c2\u1793\u1780\u17c6\u178e\u178f\u17cb\u1793\u17c3\u1780\u17b6\u179a\u179f\u1798\u17d2\u179a\u1794\u179f\u1798\u17d2\u179a\u17bd\u179b\u1787\u17b6\u1798\u17bd\u1799\u1793\u17b9\u1784\u178f\u17b6\u179a\u17b6\u1784\u1780\u17d2\u179a\u17bb\u1798\u17a0\u17ca\u17bb\u1793\u1795\u179b\u17b7\u178f\u179f\u1798\u17d2\u179a\u17b6\u1794\u17cb\u1780\u1798\u17d2\u1798\u179c\u17b7\u1792\u17b8\u1796\u17b6\u178e\u17b7\u1787\u17d2\u1787\u1780\u1798\u17d2\u1798\u17d4.<\/p>\n<h3>\u179f\u17c6\u178e\u17bd\u179a\u1791\u17b8 2: \u178f\u17be\u1798\u17b6\u1793\u17a2\u17d2\u179c\u17b8\u1780\u17be\u178f\u17a1\u17be\u1784\u1794\u17d2\u179a\u179f\u17b7\u1793\u1794\u17be\u1781\u17d2\u1789\u17bb\u17c6\u1780\u17c6\u178e\u178f\u17cb MCCB short-time delay \u1791\u17c5 0.5s \u1794\u17c9\u17bb\u1793\u17d2\u178f\u17c2\u1785\u179a\u1793\u17d2\u178f\u1780\u17c6\u17a0\u17bb\u179f\u1782\u17ba 20\u00d7 I<sub>n<\/sub>?<\/h3>\n<p><strong>\u1798\u17bd\u1799<\/strong>\u17d6 Breaker \u1793\u17b9\u1784\u178a\u17b6\u1785\u17cb <strong>\u1797\u17d2\u179b\u17b6\u1798\u17d7<\/strong> \u178f\u17b6\u1798\u179a\u1799\u17c8 magnetic trip \u178a\u17c4\u1799\u1798\u17b7\u1793\u17a2\u17be\u1796\u17be\u1780\u17b6\u179a\u1780\u17c6\u178e\u178f\u17cb 0.5s delay \u17d4 MCCB short-time delays \u178a\u17c6\u178e\u17be\u179a\u1780\u17b6\u179a\u178f\u17c2\u1793\u17c5\u1796\u17c1\u179b\u178a\u17c2\u179b\u1785\u179a\u1793\u17d2\u178f\u1780\u17c6\u17a0\u17bb\u179f\u179f\u17d2\u1790\u17b7\u178f\u1793\u17c5\u1785\u1793\u17d2\u179b\u17c4\u17c7 short-time pickup (\u17a7\u1791\u17b6\u17a0\u179a\u178e\u17cd 2-10\u00d7 I<sub>n<\/sub>) \u1793\u17b7\u1784 instantaneous threshold (\u17a7\u1791\u17b6\u17a0\u179a\u178e\u17cd 12\u00d7 I<sub>n<\/sub>)\u17d4 \u1781\u17b6\u1784\u179b\u17be instantaneous \u1792\u17b6\u178f\u17bb\u1798\u17c9\u17b6\u1789\u17c9\u17c1\u1791\u17b7\u1785\u1787\u17c6\u1793\u17bd\u179f\u1780\u17b6\u179a\u1780\u17c6\u178e\u178f\u17cb\u17a2\u17c1\u17a1\u17b7\u1785\u178f\u17d2\u179a\u17bc\u1793\u17b7\u1780\u17d4.<\/p>\n<h3>\u179f\u17c6\u178e\u17bd\u179a\u1791\u17b8 3: \u178f\u17be MCCB \u1791\u17b6\u17c6\u1784\u17a2\u179f\u17cb\u1794\u17d2\u179a\u17be\u1794\u1785\u17d2\u1785\u17c1\u1780\u179c\u17b7\u1791\u17d2\u1799\u17b6\u1780\u17c6\u178e\u178f\u17cb\u1785\u179a\u1793\u17d2\u178f\u178a\u17c2\u179a\u17ac\u1791\u17c1?<\/h3>\n<p><strong>\u1798\u17bd\u1799<\/strong>\u17d6 \u1791\u17c1\u17d4 Thermal-magnetic MCCBs (fixed trip, no adjustability) \u1787\u17b6\u1792\u1798\u17d2\u1798\u178f\u17b6\u1794\u17d2\u179a\u17be\u1792\u17b6\u178f\u17bb overload bimetallic \u178a\u17c2\u179b\u1799\u17ba\u178f\u1787\u17b6\u1784 \u17a0\u17be\u1799\u1794\u17d2\u179a\u17a0\u17c2\u179b\u1787\u17b6\u1798\u17b7\u1793\u179f\u1798\u17d2\u179a\u17c1\u1785\u1794\u17b6\u1793\u1793\u17bc\u179c\u1780\u17b6\u179a\u1780\u17c6\u178e\u178f\u17cb\u1785\u179a\u1793\u17d2\u178f\u1796\u17b7\u178f\u1794\u17d2\u179a\u17b6\u1780\u178a\u1793\u17c4\u17c7\u1791\u17c1\u17d4 Electronic-trip MCCBs \u1787\u17b6\u1798\u17bd\u1799\u1793\u17b9\u1784 contacts \u178a\u17c2\u179b\u1798\u17b6\u1793\u179f\u1780\u1798\u17d2\u1798\u1797\u17b6\u1796\u179b\u17bf\u1793 \u1793\u17b7\u1784 arc chutes \u178a\u17c2\u179b\u1794\u17b6\u1793\u1792\u17d2\u179c\u17be\u17b1\u17d2\u1799\u1794\u17d2\u179a\u179f\u17be\u179a\u17a1\u17be\u1784\u1791\u17c6\u1793\u1784\u1787\u17b6\u1780\u17c6\u178e\u178f\u17cb\u1785\u179a\u1793\u17d2\u178f (\u1795\u17d2\u1791\u17c0\u1784\u1795\u17d2\u1791\u17b6\u178f\u17cb\u1787\u17b6\u1798\u17bd\u1799 let-through curves \u179a\u1794\u179f\u17cb\u1780\u17d2\u179a\u17bb\u1798\u17a0\u17ca\u17bb\u1793\u1795\u179b\u17b7\u178f\u178a\u17c2\u179b\u1794\u1784\u17d2\u17a0\u17b6\u1789 I<sub>p<\/sub> \u1793\u17b7\u1784 I<sup>2<\/sup>t values \u1781\u17b6\u1784\u1780\u17d2\u179a\u17c4\u1798 prospective fault levels)\u17d4.<\/p>\n<h3>\u179f\u17c6\u178e\u17bd\u179a\u1791\u17b8 4: \u178f\u17be\u1781\u17d2\u1789\u17bb\u17c6\u1795\u17d2\u1791\u17c0\u1784\u1795\u17d2\u1791\u17b6\u178f\u17cb selectivity \u179a\u179c\u17b6\u1784 MCCB \u1796\u17b8\u179a\u1799\u17c9\u17b6\u1784\u178a\u17bc\u1785\u1798\u17d2\u178f\u17c1\u1785?<\/h3>\n<p><strong>\u1798\u17bd\u1799<\/strong>\u17d6 \u1794\u17d2\u179a\u17be\u178f\u17b6\u179a\u17b6\u1784\u179f\u1798\u17d2\u179a\u1794\u179f\u1798\u17d2\u179a\u17bd\u179b\u179a\u1794\u179f\u17cb\u17a2\u17d2\u1793\u1780\u1795\u179b\u17b7\u178f (\u1798\u17b7\u1793\u178f\u17d2\u179a\u17b9\u1798\u178f\u17c2 time-current curves \u1794\u17c9\u17bb\u178e\u17d2\u178e\u17c4\u17c7\u1791\u17c1)\u17d4 \u178f\u17b6\u179a\u17b6\u1784\u1782\u178e\u1793\u17b6\u179f\u1798\u17d2\u179a\u17b6\u1794\u17cb\u17d6<\/p>\n<ul>\n<li>Let-through energy (I<sup>2<\/sup>t) \u1793\u17c3 downstream breaker<\/li>\n<li>Non-tripping energy threshold \u1793\u17c3 upstream breaker<\/li>\n<li>\u17a5\u1791\u17d2\u1792\u17b7\u1796\u179b\u1780\u17c6\u178e\u178f\u17cb\u1785\u179a\u1793\u17d2\u178f\u1793\u17c5\u1780\u1798\u17d2\u179a\u17b7\u178f\u1780\u17c6\u17a0\u17bb\u179f\u1795\u17d2\u179f\u17c1\u1784\u17d7<br \/>\n\u17a7\u1791\u17b6\u17a0\u179a\u178e\u17cd\u17d6 Schneider Electric \u1795\u17d2\u178f\u179b\u17cb\u1793\u17bc\u179c\u178f\u17b6\u179a\u17b6\u1784 selectivity \u179b\u1798\u17d2\u17a2\u17b7\u178f\u1793\u17c5\u1780\u17d2\u1793\u17bb\u1784\u1780\u17b6\u179a\u178e\u17c2\u1793\u17b6\u17c6\u17a2\u17c6\u1796\u17b8\u1780\u17b6\u179a\u179f\u1798\u17d2\u179a\u1794\u179f\u1798\u17d2\u179a\u17bd\u179b\u179a\u1794\u179f\u17cb\u1796\u17bd\u1780\u1782\u17c1\u178a\u17c2\u179b\u1794\u1784\u17d2\u17a0\u17b6\u1789\u1796\u17b8\u178a\u17c2\u1793\u1780\u17c6\u178e\u178f\u17cb selectivity \u17a2\u178f\u17b7\u1794\u179a\u1798\u17b6 (\u17a7\u1791\u17b6\u17a0\u179a\u178e\u17cd \u201cSelective up to 15kA\u201d \u179a\u179c\u17b6\u1784\u1798\u17c9\u17bc\u178a\u17c2\u179b MCCB \u1787\u17b6\u1780\u17cb\u179b\u17b6\u1780\u17cb)\u17d4.<\/li>\n<\/ul>\n<h3>\u179f\u17c6\u178e\u17bd\u179a\u1791\u17b8 5: \u17a0\u17c1\u178f\u17bb\u17a2\u17d2\u179c\u17b8\u1794\u17b6\u1793\u1787\u17b6 MCCB \u178a\u17c2\u179b\u1798\u17b6\u1793 motor-rated \u1798\u17b6\u1793\u1780\u17b6\u179a\u1780\u17c6\u178e\u178f\u17cb instantaneous \u1781\u17d2\u1796\u179f\u17cb\u1787\u17b6\u1784 (13-14\u00d7 I<sub>n<\/sub>)?<\/h3>\n<p><strong>\u1798\u17bd\u1799<\/strong>\u17d6 \u178a\u17be\u1798\u17d2\u1794\u17b8\u1780\u17b6\u179a\u1796\u17b6\u179a nuisance tripping \u1780\u17c6\u17a1\u17bb\u1784\u1796\u17c1\u179b\u1785\u17b6\u1794\u17cb\u1795\u17d2\u178f\u17be\u1798\u1798\u17c9\u17bc\u1791\u17d0\u179a direct-on-line (DOL)\u17d4 \u1780\u17b6\u179a\u179f\u17d2\u179a\u17b6\u179c\u1787\u17d2\u179a\u17b6\u179c\u1794\u1784\u17d2\u17a0\u17b6\u1789\u1790\u17b6 motor inrush \u17a2\u17b6\u1785\u1788\u17b6\u1793\u178a\u179b\u17cb 12-13\u00d7 I<sub>n<\/sub> \u179f\u1798\u17d2\u179a\u17b6\u1794\u17cb peak \u178a\u17c6\u1794\u17bc\u1784\u17d4 MCCB \u178a\u17c2\u179b\u1798\u17b6\u1793 motor-rated \u1780\u17cf\u1798\u17b6\u1793 contact repulsion thresholds \u1781\u17d2\u1796\u179f\u17cb\u1787\u17b6\u1784 (&gt;14\u00d7 I<sub>n<\/sub>) \u178a\u17be\u1798\u17d2\u1794\u17b8\u1792\u17b6\u1793\u17b6\u1790\u17b6 contacts \u1798\u17b7\u1793\u1794\u17be\u1780\u1780\u17c6\u17a1\u17bb\u1784\u1796\u17c1\u179b starting transients \u178a\u17c2\u179b\u1793\u17b9\u1784\u1794\u178e\u17d2\u178f\u17b6\u179b\u17b1\u17d2\u1799\u1798\u17b6\u1793\u1780\u17b6\u179a\u1796\u17b6\u1780\u17cb\u178a\u17c2\u179b\u1798\u17b7\u1793\u1785\u17b6\u17c6\u1794\u17b6\u1785\u17cb \u1793\u17b7\u1784 welding \u178a\u17c2\u179b\u17a2\u17b6\u1785\u1780\u17be\u178f\u1798\u17b6\u1793\u1793\u17c5\u1796\u17c1\u179b reclosure \u17d4.<\/p>\n<hr \/>\n<h2>\u179f\u17c1\u1785\u1780\u17d2\u178f\u17b8\u179f\u1793\u17d2\u1793\u17b7<\/h2>\n<p>\u1797\u17b6\u1796\u1795\u17d2\u1791\u17bb\u1799\u1782\u17d2\u1793\u17b6\u1787\u17b6\u1780\u17cb\u179f\u17d2\u178f\u17c2\u1784\u1793\u17c3 MCCB \u178a\u17c2\u179b\u1795\u17d2\u178f\u179b\u17cb\u1793\u17bc\u179c short-time delay protection \u178a\u17c4\u1799\u1782\u17d2\u1798\u17b6\u1793 rated I<sub>cw<\/sub> values \u1780\u17be\u178f\u1785\u17c1\u1789\u1796\u17b8\u1797\u17b6\u1796\u1781\u17bb\u179f\u1782\u17d2\u1793\u17b6\u1798\u17bc\u179b\u178a\u17d2\u178b\u17b6\u1793\u1793\u17c5\u1780\u17d2\u1793\u17bb\u1784\u1791\u179f\u17d2\u179f\u1793\u179c\u17b7\u1787\u17d2\u1787\u17b6\u1780\u17b6\u179a\u1796\u17b6\u179a\u17d6 <strong>ACBs \u1791\u1794\u17cb\u1791\u179b\u17cb\u1793\u17b9\u1784\u1780\u17c6\u17a0\u17bb\u179f\u178f\u17b6\u1798\u179a\u1799\u17c8\u1780\u1798\u17d2\u179b\u17b6\u17c6\u1784\u1798\u17c1\u1780\u17b6\u1793\u17b7\u1785 \u1793\u17b7\u1784 thermal mass \u1781\u178e\u17c8\u1796\u17c1\u179b\u178a\u17c2\u179b MCCBs \u1780\u17c6\u178e\u178f\u17cb\u1780\u17c6\u17a0\u17bb\u179f\u178f\u17b6\u1798\u179a\u1799\u17c8\u179a\u17bc\u1794\u179c\u17b7\u1791\u17d2\u1799\u17b6\u17a2\u17c1\u17a1\u17b7\u1785\u178f\u17d2\u179a\u17bc\u1798\u17c9\u17b6\u1789\u17c9\u17c1\u1791\u17b7\u1785 \u1793\u17b7\u1784\u1780\u17b6\u179a\u179a\u17c6\u1781\u17b6\u1793 arc \u1799\u17c9\u17b6\u1784\u1786\u17b6\u1794\u17cb\u179a\u17a0\u17d0\u179f\u17d4.<\/strong><\/p>\n<p>\u1780\u17b6\u179a\u1799\u179b\u17cb\u178a\u17b9\u1784\u1796\u17b8\u1797\u17b6\u1796\u1781\u17bb\u179f\u1782\u17d2\u1793\u17b6\u1793\u17c1\u17c7\u1782\u17ba\u1798\u17b6\u1793\u179f\u17b6\u179a\u17c8\u179f\u17c6\u1781\u17b6\u1793\u17cb\u179f\u1798\u17d2\u179a\u17b6\u1794\u17cb\u179c\u17b7\u179f\u17d2\u179c\u1780\u179a\u17a2\u1782\u17d2\u1782\u17b7\u179f\u1793\u17b8\u178a\u17c2\u179b\u179a\u1785\u1793\u17b6 schemes \u179f\u1798\u17d2\u179a\u1794\u179f\u1798\u17d2\u179a\u17bd\u179b\u17d4 MCCBs \u17a2\u17b6\u1785\u179f\u1798\u17d2\u179a\u17c1\u1785\u1794\u17b6\u1793\u1793\u17bc\u179c selective coordination \u1787\u17b6\u1798\u17bd\u1799\u17a7\u1794\u1780\u179a\u178e\u17cd downstream \u1793\u17c5\u1780\u17d2\u1793\u17bb\u1784 short-time withstand capability \u179a\u1794\u179f\u17cb\u1796\u17bd\u1780\u1782\u17c1 (\u1787\u17b6\u1792\u1798\u17d2\u1798\u178f\u17b6 12-14\u00d7 I<sub>n<\/sub>) \u1794\u17c9\u17bb\u1793\u17d2\u178f\u17c2\u1796\u17bd\u1780\u179c\u17b6\u1798\u17b7\u1793\u17a2\u17b6\u1785\u1785\u1798\u17d2\u179b\u1784\u17a5\u179a\u17b7\u1799\u17b6\u1794\u1790 ACB \u1793\u17c5\u1785\u179a\u1793\u17d2\u178f\u1780\u17c6\u17a0\u17bb\u179f\u1781\u17d2\u1796\u179f\u17cb\u178a\u17c2\u179b\u1781\u17b7\u178f\u1787\u17b7\u178f\u179f\u1798\u178f\u17d2\u1790\u1797\u17b6\u1796\u1794\u17c6\u1794\u17c2\u1780\u179a\u1794\u179f\u17cb\u1796\u17bd\u1780\u1782\u17c1\u1794\u17b6\u1793\u1791\u17c1\u17d4 \u179f\u1798\u17d2\u179a\u17b6\u1794\u17cb\u1780\u1798\u17d2\u1798\u179c\u17b7\u1792\u17b8\u178a\u17c2\u179b\u178f\u17d2\u179a\u17bc\u179c\u1780\u17b6\u179a selectivity \u1796\u17c1\u1789\u179b\u17c1\u1789\u1793\u17c5\u1791\u17bc\u1791\u17b6\u17c6\u1784\u1787\u17bd\u179a\u1785\u179a\u1793\u17d2\u178f\u1780\u17c6\u17a0\u17bb\u179f\u1791\u17b6\u17c6\u1784\u1798\u17bc\u179b ACB main incomers \u178a\u17c2\u179b\u179f\u1798\u17d2\u179a\u1794\u179f\u1798\u17d2\u179a\u17bd\u179b\u1787\u17b6\u1798\u17bd\u1799 MCCB feeders \u1793\u17c5\u178f\u17c2\u1787\u17b6\u179f\u17d2\u178f\u1784\u17cb\u178a\u17b6\u179a\u1798\u17b6\u179f\u2014\u178a\u17c4\u1799\u1794\u17d2\u179a\u17be\u1794\u17d2\u179a\u17b6\u179f\u17cb Category B time-delay capabilities upstream \u1781\u178e\u17c8\u1796\u17c1\u179b\u178a\u17c2\u179b\u1791\u17b6\u1789\u1799\u1780\u1794\u17d2\u179a\u1799\u17c4\u1787\u1793\u17cd\u1796\u17b8 Category A current-limiting benefits downstream \u17d4.<\/p>\n<p><strong>\u1782\u17c4\u179b\u1780\u17b6\u179a\u178e\u17cd\u179a\u1785\u1793\u17b6\u1782\u1793\u17d2\u179b\u17b9\u17c7<\/strong>\u17d6 \u1795\u17d2\u1782\u17bc\u1795\u17d2\u1782\u1784\u1794\u17d2\u179a\u1797\u17c1\u1791 breaker \u1791\u17c5\u1793\u17b9\u1784\u1780\u1798\u17d2\u1798\u179c\u17b7\u1792\u17b8\u2014\u1794\u17d2\u179a\u17be ACBs \u1780\u1793\u17d2\u179b\u17c2\u1784\u178a\u17c2\u179b\u17a2\u17d2\u1793\u1780\u178f\u17d2\u179a\u17bc\u179c\u1780\u17b6\u179a \u201c\u179a\u1784\u17cb\u1785\u17b6\u17c6\u201d \u1780\u17c6\u17a0\u17bb\u179f \u1794\u17d2\u179a\u17be MCCBs \u1780\u1793\u17d2\u179b\u17c2\u1784\u178a\u17c2\u179b\u17a2\u17d2\u1793\u1780\u178f\u17d2\u179a\u17bc\u179c\u1780\u17b6\u179a \u201c\u179f\u1798\u17d2\u179b\u17b6\u1794\u17cb\u1780\u17c6\u17a0\u17bb\u179f\u17b1\u17d2\u1799\u179b\u17bf\u1793\u201d \u17d4\u201d<\/p>\n<hr \/>\n<p><strong>\u17a2\u17c6\u1796\u17b8 VIOX Electric<\/strong>\u17d6 VIOX Electric \u1782\u17ba\u1787\u17b6\u1780\u17d2\u179a\u17bb\u1798\u17a0\u17ca\u17bb\u1793\u1795\u179b\u17b7\u178f\u17a7\u1794\u1780\u179a\u178e\u17cd\u17a2\u1782\u17d2\u1782\u17b7\u179f\u1793\u17b8 B2B \u1788\u17b6\u1793\u1798\u17bb\u1781\u1782\u17c1 \u178a\u17c2\u179b\u1798\u17b6\u1793\u17af\u1780\u1791\u17c1\u179f\u1781\u17b6\u1784 molded case circuit breakers (MCCBs), air circuit breakers (ACBs) \u1793\u17b7\u1784\u178a\u17c6\u178e\u17c4\u17c7\u179f\u17d2\u179a\u17b6\u1799\u1780\u17b6\u179a\u1796\u17b6\u179a\u178a\u17cf\u1791\u17bc\u179b\u17c6\u1791\u17bc\u179b\u17b6\u1799\u179f\u1798\u17d2\u179a\u17b6\u1794\u17cb\u1780\u1798\u17d2\u1798\u179c\u17b7\u1792\u17b8\u17a7\u179f\u17d2\u179f\u17b6\u17a0\u1780\u1798\u17d2\u1798 \u1793\u17b7\u1784\u1796\u17b6\u178e\u17b7\u1787\u17d2\u1787\u1780\u1798\u17d2\u1798\u17d4 \u1780\u17d2\u179a\u17bb\u1798\u179c\u17b7\u179f\u17d2\u179c\u1780\u1798\u17d2\u1798\u179a\u1794\u179f\u17cb\u1799\u17be\u1784\u1795\u17d2\u178f\u179b\u17cb\u1780\u17b6\u179a\u1782\u17b6\u17c6\u1791\u17d2\u179a\u1795\u17d2\u1793\u17c2\u1780\u1794\u1785\u17d2\u1785\u17c1\u1780\u1791\u17c1\u179f\u179f\u1798\u17d2\u179a\u17b6\u1794\u17cb\u1780\u17b6\u179a\u179f\u17b7\u1780\u17d2\u179f\u17b6\u179f\u1798\u17d2\u179a\u1794\u179f\u1798\u17d2\u179a\u17bd\u179b\u178a\u17cf\u179f\u17d2\u1798\u17bb\u1782\u179f\u17d2\u1798\u17b6\u1789 \u1793\u17b7\u1784\u1780\u17b6\u179a\u1794\u1784\u17d2\u1780\u17be\u1793\u1794\u17d2\u179a\u179f\u17b7\u1791\u17d2\u1792\u1797\u17b6\u1796\u1780\u17b6\u179a\u179a\u1785\u1793\u17b6\u1794\u17d2\u179a\u1796\u17d0\u1793\u17d2\u1792\u17d4. <a href=\"https:\/\/test.viox.com\/km\/\">\u1791\u17b6\u1780\u17cb\u1791\u1784\u1798\u1780\u1799\u17be\u1784\u1781\u17d2\u1789\u17bb\u17c6<\/a> \u179f\u1798\u17d2\u179a\u17b6\u1794\u17cb\u1780\u17b6\u179a\u178e\u17c2\u1793\u17b6\u17c6\u1787\u17b6\u1780\u17cb\u179b\u17b6\u1780\u17cb\u1793\u17c3\u1780\u1798\u17d2\u1798\u179c\u17b7\u1792\u17b8\u17d4.<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>MCCB electronic trip unit in industrial panel showing 400A rating and current display &#8211; VIOX Electric Direct Answer Molded Case Circuit Breakers (MCCBs) can provide short-time delay protection without a rated short-time withstand current (Icw) because they belong to IEC 60947-2 Category A, where selectivity is achieved through current-limiting technology rather than intentional time delays. 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