{"id":16685,"date":"2025-05-19T23:09:46","date_gmt":"2025-05-19T15:09:46","guid":{"rendered":"https:\/\/viox.com\/?p=16685"},"modified":"2026-01-19T11:25:18","modified_gmt":"2026-01-19T03:25:18","slug":"how-to-select-an-mccb-for-a-panel","status":"publish","type":"post","link":"https:\/\/test.viox.com\/ja\/how-to-select-an-mccb-for-a-panel\/","title":{"rendered":"\u30d1\u30cd\u30eb\u7528MCCB\u306e\u9078\u3073\u65b9\uff1a\u30e2\u30fc\u30eb\u30c9\u30fb\u30b1\u30fc\u30b9\u30fb\u30b5\u30fc\u30ad\u30c3\u30c8\u30fb\u30d6\u30ec\u30fc\u30ab\u306e\u7a76\u6975\u306e\u30ac\u30a4\u30c9"},"content":{"rendered":"<div class=\"product-intro\">\n<p>\u9069\u5207\u306a\u906e\u65ad\u5668\u306e\u9078\u629e <a href=\"https:\/\/test.viox.com\/ja\/mccb\/\"><strong>\u30e2\u30fc\u30eb\u30c9\u30b1\u30fc\u30b9\u30b5\u30fc\u30ad\u30c3\u30c8\u30d6\u30ec\u30fc\u30ab\uff08MCCB\uff09<\/strong><\/a> \u306f\u3001\u96fb\u6c17\u914d\u96fb\u30b7\u30b9\u30c6\u30e0\u306e\u5b89\u5168\u6027\u3001\u4fe1\u983c\u6027\u3001\u304a\u3088\u3073\u30b3\u30f3\u30d7\u30e9\u30a4\u30a2\u30f3\u30b9\u306b\u76f4\u63a5\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u91cd\u8981\u306a\u30a8\u30f3\u30b8\u30cb\u30a2\u30ea\u30f3\u30b0\u4e0a\u306e\u6c7a\u5b9a\u3067\u3059\u3002\u6a19\u6e96\u7684\u306a\u4f4f\u5b85\u7528\u30d6\u30ec\u30fc\u30ab\u30fc\u3068\u306f\u7570\u306a\u308a\u3001MCCB\u306f\u9ad8\u51fa\u529b\u306e\u7523\u696d\u304a\u3088\u3073\u5546\u696d\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5411\u3051\u306b\u8a2d\u8a08\u3055\u308c\u3066\u304a\u308a\u3001\u8abf\u6574\u53ef\u80fd\u306a\u4fdd\u8b77\u8a2d\u5b9a\u3068\u9ad8\u3044\u906e\u65ad\u5bb9\u91cf\u3092\u5099\u3048\u3066\u3044\u307e\u3059\u3002 <strong>IEC 60947-2<\/strong>.<\/p>\n<p>MCCB\u306e\u9078\u629e\u3092\u8aa4\u308b\u3068\u3001\u4e0d\u8981\u306a\u30c8\u30ea\u30c3\u30d7\u3001\u6a5f\u5668\u306e\u640d\u50b7\u3001\u307e\u305f\u306f\u77ed\u7d61\u6642\u306e\u58ca\u6ec5\u7684\u306a\u6545\u969c\u306b\u3064\u306a\u304c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u7a76\u6975\u306e\u30ac\u30a4\u30c9\u3067\u306f\u3001\u6545\u969c\u96fb\u6d41\u306e\u8a08\u7b97\u304b\u3089\u9078\u629e\u6027\u306e\u691c\u8a3c\u307e\u3067\u3001\u6280\u8853\u7684\u306a\u9078\u629e\u30d7\u30ed\u30bb\u30b9\u3092\u9806\u3092\u8ffd\u3063\u3066\u8aac\u660e\u3057\u3001\u30d1\u30cd\u30eb\u306b\u6700\u9069\u306aMCCB\u3092\u9078\u629e\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u307e\u3059\u3002.<\/p>\n<h2>MCCB\u3068\u306f\u4f55\u304b\u3001\u305d\u3057\u3066\u306a\u305c\u305d\u308c\u3092\u4f7f\u7528\u3059\u308b\u306e\u304b\uff1f<\/h2>\n<p>A <a href=\"https:\/\/test.viox.com\/ja\/what-is-a-molded-case-circuit-breaker-mccb\/\">\u30e2\u30fc\u30eb\u30c9\u30b1\u30fc\u30b9\u30b5\u30fc\u30ad\u30c3\u30c8\u30d6\u30ec\u30fc\u30ab\uff08MCCB\uff09<\/a> \u306f\u3001\u904e\u8ca0\u8377\u3084\u77ed\u7d61\u304b\u3089\u56de\u8def\u3092\u4fdd\u8b77\u3059\u308b\u7523\u696d\u7528\u30b0\u30ec\u30fc\u30c9\u306e\u96fb\u6c17\u4fdd\u8b77\u30c7\u30d0\u30a4\u30b9\u3067\u3059\u3002\u30b9\u30a4\u30c3\u30c1\u30f3\u30b0\u6a5f\u69cb\u3001\u6d88\u5f27\u5ba4\u3001\u304a\u3088\u3073\u30c8\u30ea\u30c3\u30d7\u30e6\u30cb\u30c3\u30c8\u3092\u53ce\u5bb9\u3059\u308b\u6210\u5f62\u7d76\u7e01\u30cf\u30a6\u30b8\u30f3\u30b0\u306b\u3088\u3063\u3066\u5b9a\u7fa9\u3055\u308c\u307e\u3059\u3002.<\/p>\n<p>\u4e00\u65b9 <a href=\"https:\/\/test.viox.com\/ja\/mcb\/\">\u30df\u30cb\u30c1\u30e5\u30a2\u906e\u65ad\u5668(MCBs)<\/a> \u306f\u6700\u7d42\u914d\u96fb\u56de\u8def\u306b\u9069\u3057\u3066\u3044\u307e\u3059\u304c\u3001MCCB\u306f\u3001\u3088\u308a\u9ad8\u3044\u96fb\u6d41\u5b9a\u683c\u3068\u8abf\u6574\u53ef\u80fd\u306a\u7279\u6027\u306b\u3088\u308a\u3001\u914d\u96fb\u30d5\u30a3\u30fc\u30c0\u30fc\u306e\u6a19\u6e96\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002.<\/p>\n<h3>\u6bd4\u8f03\uff1aMCCB vs. MCB<\/h3>\n<table style=\"border-collapse: collapse; width: 100%; border: 1px solid #ddd; text-align: left;\" border=\"1\" cellspacing=\"0\" cellpadding=\"8\">\n<thead>\n<tr style=\"background-color: #f2f2f2;\">\n<th>\u7279\u5fb4<\/th>\n<th>\u30df\u30cb\u30c1\u30e5\u30a2\u56de\u8def\u906e\u65ad\u5668\uff08MCB\uff09<\/th>\n<th>\u30e2\u30fc\u30eb\u30c9\u30b1\u30fc\u30b9\u30b5\u30fc\u30ad\u30c3\u30c8\u30d6\u30ec\u30fc\u30ab\uff08MCCB\uff09<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>\u5b9a\u683c\u96fb\u6d41 (In)<\/strong><\/td>\n<td>\u901a\u5e380.5A \u2013 125A<\/td>\n<td>\u901a\u5e3816A \u2013 2500A<\/td>\n<\/tr>\n<tr>\n<td><strong>\u906e\u65ad\u5bb9\u91cf (Icu)<\/strong><\/td>\n<td>\u4f4e\u3044\uff084.5kA \u2013 15kA\uff09<\/td>\n<td>\u9ad8\u3044\uff0816kA \u2013 200kA\uff09<\/td>\n<\/tr>\n<tr>\n<td><strong>\u65c5\u306e\u7279\u5fb4<\/strong><\/td>\n<td>\u56fa\u5b9a\uff08B\u3001C\u3001D\u30ab\u30fc\u30d6\uff09<\/td>\n<td>\u8abf\u6574\u53ef\u80fd\uff08L\u3001S\u3001I\u3001G\u8a2d\u5b9a\uff09<\/td>\n<\/tr>\n<tr>\n<td><strong>\u6a19\u6e96<\/strong><\/td>\n<td>IEC 60898-1\uff08\u5bb6\u5ead\u7528\uff09<\/td>\n<td>IEC 60947-2\uff08\u7523\u696d\u7528\uff09<\/td>\n<\/tr>\n<tr>\n<td><strong>\u64cd\u4f5c<\/strong><\/td>\n<td>\u71b1\u78c1\u6c17\u5f0f\u306e\u307f<\/td>\n<td>\u71b1\u78c1\u6c17\u5f0f\u307e\u305f\u306f\u96fb\u5b50\u5f0f\uff08\u30de\u30a4\u30af\u30ed\u30d7\u30ed\u30bb\u30c3\u30b5\uff09<\/td>\n<\/tr>\n<tr>\n<td><strong>\u30ea\u30e2\u30b3\u30f3<\/strong><\/td>\n<td>\u9650\u5b9a\u7684\u306a\u30a2\u30af\u30bb\u30b5\u30ea<\/td>\n<td>\u30d5\u30eb\u30ec\u30f3\u30b8\uff08\u30b7\u30e3\u30f3\u30c8\u30c8\u30ea\u30c3\u30d7\u3001UVR\u3001\u30e2\u30fc\u30bf\u30fc\u30aa\u30da\u30ec\u30fc\u30bf\u30fc\uff09<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/ndustrial-electrical-panel-with-multiple-VIOX-MCCBs-showing-different-frame-sizes-and-rating-labels-during-installation.webp\" alt=\"Industrial electrical panel with multiple VIOX MCCBs showing different frame sizes and rating labels during installation\" \/><figcaption style=\"font-style: italic; color: #555; margin-top: 8px;\">DIN\u30ec\u30fc\u30eb\u4e0a\u306e\u3055\u307e\u3056\u307e\u306a\u30d5\u30ec\u30fc\u30e0\u30b5\u30a4\u30ba\u306eVIOX MCCB\u3092\u5099\u3048\u305f\u7523\u696d\u7528\u96fb\u6c17\u30d1\u30cd\u30eb\u306e\u8a2d\u7f6e\u3002.<\/figcaption><\/figure>\n<h2>MCCB\u9078\u629e\u306e\u91cd\u8981\u306a\u8981\u7d20<\/h2>\n<h3>1. \u96fb\u6d41\u5b9a\u683c\uff08In\uff09\u3068\u30d5\u30ec\u30fc\u30e0\u30b5\u30a4\u30ba\uff08Inm\uff09<\/h3>\n<p>\u306b\u3064\u3044\u3066 <strong>\u30d5\u30ec\u30fc\u30e0\u30b5\u30a4\u30ba\uff08\u30a4\u30f3\u30c1\u30e0\uff09<\/strong> \u306f\u3001\u7269\u7406\u7684\u306a\u5bf8\u6cd5\u3068\u3001\u30d6\u30ec\u30fc\u30ab\u30fc\u30cf\u30a6\u30b8\u30f3\u30b0\u304c\u51e6\u7406\u3067\u304d\u308b\u6700\u5927\u96fb\u6d41\u3092\u6c7a\u5b9a\u3057\u307e\u3059\uff08\u4f8b\uff1a250A\u30d5\u30ec\u30fc\u30e0\uff09\u3002 <strong>\u5b9a\u683c\u96fb\u6d41 (In)<\/strong> \u306f\u3001\u30d6\u30ec\u30fc\u30ab\u30fc\u304c\u904b\u3076\u3088\u3046\u306b\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b\u5b9f\u969b\u306e\u96fb\u6d41\u5024\u3067\u3059\uff08\u4f8b\uff1a250A\u30d5\u30ec\u30fc\u30e0\u306e160A\u30c8\u30ea\u30c3\u30d7\u30e6\u30cb\u30c3\u30c8\uff09\u3002.<\/p>\n<ul>\n<li><strong>\u9078\u629e\u30eb\u30fc\u30eb:<\/strong> Ib \u2264 In \u2264 Iz\n<ul>\n<li>Ib\uff1a\u56de\u8def\u306e\u8a2d\u8a08\u96fb\u6d41\u3002.<\/li>\n<li>In\uff1aMCCB\u306e\u5b9a\u683c\u96fb\u6d41\u3002.<\/li>\n<li>Iz\uff1a\u30b1\u30fc\u30d6\u30eb\u306e\u8a31\u5bb9\u96fb\u6d41\u3002.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>2. \u906e\u65ad\u5bb9\u91cf\uff08Icu vs. Ics\uff09<\/h3>\n<p>\u906e\u65ad\u5bb9\u91cf\u306f\u3001MCCB\u304c\u5b89\u5168\u306b\u906e\u65ad\u3067\u304d\u308b\u6700\u5927\u6545\u969c\u96fb\u6d41\u3067\u3059\u3002 <strong>IEC 60947-2<\/strong>, \u306b\u306f\u30012\u3064\u306e\u91cd\u8981\u306a\u5b9a\u683c\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>Icu\uff08\u7a76\u6975\u906e\u65ad\u5bb9\u91cf\uff09\uff1a<\/strong> \u30d6\u30ec\u30fc\u30ab\u30fc\u304c\u4e00\u5ea6\u3060\u3051\u906e\u65ad\u3067\u304d\u308b\u6700\u5927\u96fb\u6d41\u3002\u305d\u306e\u5f8c\u306f\u4f7f\u7528\u3067\u304d\u306a\u304f\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002.<\/li>\n<li><strong>Ics\uff08\u4f7f\u7528\u906e\u65ad\u5bb9\u91cf\uff09\uff1a<\/strong> \u30d6\u30ec\u30fc\u30ab\u30fc\u304c\u7e70\u308a\u8fd4\u3057\u906e\u65ad\u3067\u304d\u3001\u305d\u308c\u3067\u3082\u52d5\u4f5c\u53ef\u80fd\u306a\u72b6\u614b\u3092\u7dad\u6301\u3067\u304d\u308b\u96fb\u6d41\u3002.<\/li>\n<\/ul>\n<p>\u30af\u30ea\u30c6\u30a3\u30ab\u30eb\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\uff08\u75c5\u9662\u3001\u30c7\u30fc\u30bf\u30bb\u30f3\u30bf\u30fc\uff09\u306e\u5834\u5408\u3001\u4ee5\u4e0b\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002 <strong>Ics = 100% Icu<\/strong>. \u3002\u6a19\u6e96\u7684\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u5834\u5408\u3001Ics = 50%\u307e\u305f\u306f75% Icu\u304c\u8a31\u5bb9\u3055\u308c\u308b\u3053\u3068\u304c\u3088\u304f\u3042\u308a\u307e\u3059\u3002\u8a73\u7d30\u306b\u3064\u3044\u3066\u306f\u3001\u4ee5\u4e0b\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002 <a href=\"https:\/\/test.viox.com\/ja\/circuit-breaker-ratings-icu-ics-icw-icm\/\">Icu vs Ics\u5b9a\u683c<\/a>.<\/p>\n<p><strong>\u906e\u65ad\u5bb9\u91cf\u9078\u629e\u30de\u30c8\u30ea\u30c3\u30af\u30b9\uff1a<\/strong><\/p>\n<table style=\"border-collapse: collapse; width: 100%; border: 1px solid #ddd; text-align: left;\" border=\"1\" cellspacing=\"0\" cellpadding=\"8\">\n<thead>\n<tr style=\"background-color: #f2f2f2;\">\n<th>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30b7\u30ca\u30ea\u30aa<\/th>\n<th>\u4e88\u60f3\u77ed\u7d61\u96fb\u6d41\uff08PSCC\uff09<\/th>\n<th>\u63a8\u5968\u3055\u308c\u308bMCCB\u906e\u65ad\u5bb9\u91cf<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>\u4f4f\u5b85\/\u8efd\u5546\u696d<\/strong><\/td>\n<td>&lt; 10 kA<\/td>\n<td>16 kA\u307e\u305f\u306f25 kA<\/td>\n<\/tr>\n<tr>\n<td><strong>\u5546\u696d\u30d3\u30eb\u30e1\u30a4\u30f3\u30d1\u30cd\u30eb<\/strong><\/td>\n<td>15 kA \u2013 35 kA<\/td>\n<td>36 kA\u307e\u305f\u306f50 kA<\/td>\n<\/tr>\n<tr>\n<td><strong>\u7523\u696d\u7528\u30e1\u30a4\u30f3\u30b9\u30a4\u30c3\u30c1\u30dc\u30fc\u30c9<\/strong><\/td>\n<td>35 kA \u2013 65 kA<\/td>\n<td>70 kA\u307e\u305f\u306f85 kA<\/td>\n<\/tr>\n<tr>\n<td><strong>\u91cd\u5de5\u696d\/\u5909\u5727\u5668\u51fa\u529b<\/strong><\/td>\n<td>&gt; 70 kA<\/td>\n<td>100 kA\u307e\u305f\u306f150 kA<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/Close-up-of-VIOX-MCCB-nameplate-showing-rated-current-breaking-capacity-and-IEC-60947-2-certification-specifications.webp\" alt=\"Close-up of VIOX MCCB nameplate showing rated current, breaking capacity and IEC 60947-2 certification specifications\" \/><figcaption style=\"font-style: italic; color: #555; margin-top: 8px;\">\u5b9a\u683c\u96fb\u6d41\uff08In\uff09\u3001\u906e\u65ad\u5bb9\u91cf\uff08Icu\uff09\u3001\u304a\u3088\u3073IEC 60947-2\u4ed5\u69d8\u3092\u8868\u793a\u3059\u308bVIOX MCCB\u9298\u677f\u306e\u30af\u30ed\u30fc\u30ba\u30a2\u30c3\u30d7\u3002.<\/figcaption><\/figure>\n<h3>3. \u96fb\u5727\u5b9a\u683c<\/h3>\n<p>MCCB\u304c\u30b7\u30b9\u30c6\u30e0\u306e\u96fb\u5727\u8981\u4ef6\u3092\u6e80\u305f\u3057\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u4ee5\u4e0b\u3092\u53c2\u7167\u3057\u3066\u304f\u3060\u3055\u3044\u3002 <a href=\"https:\/\/test.viox.com\/ja\/ue-vs-ui-vs-uimp-voltage-ratings-guide\/\">Ue vs Ui vs Uimp\u30ac\u30a4\u30c9<\/a> \u8a73\u7d30\u306a\u6280\u8853\u7684\u5b9a\u7fa9\u306b\u3064\u3044\u3066\u3002.<\/p>\n<ul>\n<li><strong>Ue\uff08\u5b9a\u683c\u4f7f\u7528\u96fb\u5727\uff09\uff1a<\/strong> \u901a\u5e38400V\/415V\u307e\u305f\u306f690V\u3002.<\/li>\n<li><strong>Ui\uff08\u5b9a\u683c\u7d76\u7e01\u96fb\u5727\uff09\uff1a<\/strong> Ue\u4ee5\u4e0a\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\uff08\u901a\u5e38800V\u307e\u305f\u306f1000V\uff09\u3002.<\/li>\n<li><strong>Uimp\uff08\u30a4\u30f3\u30d1\u30eb\u30b9\u8010\u96fb\u5727\uff09\uff1a<\/strong> \u96fb\u5727\u30b9\u30d1\u30a4\u30af\u306b\u5bfe\u3059\u308b\u8010\u6027\uff08\u901a\u5e388kV\uff09\u3002.<\/li>\n<\/ul>\n<h3>4. \u30c8\u30ea\u30c3\u30d7\u30e6\u30cb\u30c3\u30c8\u6280\u8853<\/h3>\n<p>\u30c8\u30ea\u30c3\u30d7\u30e6\u30cb\u30c3\u30c8\u306f\u3001MCCB\u306e\u300c\u982d\u8133\u300d\u3067\u3059\u3002.<\/p>\n<table style=\"border-collapse: collapse; width: 100%; border: 1px solid #ddd; text-align: left;\" border=\"1\" cellspacing=\"0\" cellpadding=\"8\">\n<thead>\n<tr style=\"background-color: #f2f2f2;\">\n<th>\u7279\u5fb4<\/th>\n<th>\u71b1\u78c1\u5f0f (TM)<\/th>\n<th>\u96fb\u5b50\u5f0f\uff08\u30de\u30a4\u30af\u30ed\u30d7\u30ed\u30bb\u30c3\u30b5\u30fc\uff09<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>\u4fdd\u8b77\u30e1\u30ab\u30cb\u30ba\u30e0<\/strong><\/td>\n<td>\u30d0\u30a4\u30e1\u30bf\u30eb\uff08\u904e\u8ca0\u8377\uff09+ \u30b3\u30a4\u30eb\uff08\u77ed\u7d61\uff09<\/td>\n<td>\u5909\u6d41\u5668 + CPU<\/td>\n<\/tr>\n<tr>\n<td><strong>\u7cbe\u5bc6<\/strong><\/td>\n<td>\u4e2d\u7a0b\u5ea6\uff08\u5468\u56f2\u6e29\u5ea6\u306e\u5f71\u97ff\u3092\u53d7\u3051\u308b\uff09<\/td>\n<td>\u9ad8\u3044\uff08\u6e29\u5ea6\u306b\u4f9d\u5b58\u3057\u306a\u3044\uff09<\/td>\n<\/tr>\n<tr>\n<td><strong>\u8abf\u6574\u6a5f\u80fd<\/strong><\/td>\n<td>\u9650\u5b9a\u7684 (0.7 \u2013 1.0 x In)<\/td>\n<td>\u5e83\u7bc4\u56f2 (0.4 \u2013 1.0 x In) + \u9045\u5ef6\u6642\u9593<\/td>\n<\/tr>\n<tr>\n<td><strong>\u6a5f\u80fd<\/strong><\/td>\n<td>LI (\u9577\u6642\u9593\u3001\u77ac\u6642)<\/td>\n<td>LSI \u307e\u305f\u306f LSIG (\u5730\u7d61)<\/td>\n<\/tr>\n<tr>\n<td><strong>\u30b3\u30b9\u30c8<\/strong><\/td>\n<td>\u3088\u308a\u4f4e\u3044<\/td>\n<td>\u3088\u308a\u9ad8\u3044<\/td>\n<\/tr>\n<tr>\n<td><strong>\u6700\u9069<\/strong><\/td>\n<td>\u6a19\u6e96\u30d5\u30a3\u30fc\u30c0\u30fc\u3001\u5358\u7d14\u306a\u8ca0\u8377<\/td>\n<td>\u767a\u96fb\u6a5f\u3001\u8907\u96d1\u306a\u5354\u8abf\u3001\u30e2\u30fc\u30bf\u30fc<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/Technical-cutaway-diagram-of-MCCB-internal-components-including-thermal-trip-magnetic-trip-arc-chute-and-contact-mechanism.webp\" alt=\"Technical cutaway diagram of MCCB internal components including thermal trip, magnetic trip, arc chute and contact mechanism\" \/><figcaption style=\"font-style: italic; color: #555; margin-top: 8px;\">\u71b1\u78c1\u5f0f\u30c8\u30ea\u30c3\u30d7\u30e6\u30cb\u30c3\u30c8\u3001\u30a2\u30fc\u30af\u30b7\u30e5\u30fc\u30c8\u3001\u304a\u3088\u3073\u63a5\u89e6\u6a5f\u69cb\u3092\u793a\u3059MCCB\u306e\u5185\u90e8\u65ad\u9762\u56f3\u3002.<\/figcaption><\/figure>\n<h2>\u30b9\u30c6\u30c3\u30d7\u30fb\u30d0\u30a4\u30fb\u30b9\u30c6\u30c3\u30d7\u9078\u629e\u30ac\u30a4\u30c9<\/h2>\n<p>\u6b63\u3057\u3044MCCB\u3092\u6307\u5b9a\u3059\u308b\u306b\u306f\u3001\u3053\u306e\u30a8\u30f3\u30b8\u30cb\u30a2\u30ea\u30f3\u30b0\u30ef\u30fc\u30af\u30d5\u30ed\u30fc\u306b\u5f93\u3063\u3066\u304f\u3060\u3055\u3044\u3002.<\/p>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/MCCB-selection-process-flowchart-showing-step-by-step-decision-points-from-load-calculation-to-final-specification.webp\" alt=\"MCCB selection process flowchart showing step-by-step decision points from load calculation to final specification\" \/><figcaption style=\"font-style: italic; color: #555; margin-top: 8px;\">MCCB\u9078\u5b9a\u306e\u30b9\u30c6\u30c3\u30d7\u30d0\u30a4\u30b9\u30c6\u30c3\u30d7\u306e\u30d7\u30ed\u30bb\u30b9\u30d5\u30ed\u30fc\u30c1\u30e3\u30fc\u30c8\uff1a\u8ca0\u8377\u8a08\u7b97\u304b\u3089\u6700\u7d42\u4ed5\u69d8\u307e\u3067\u3002.<\/figcaption><\/figure>\n<h3>\u30b9\u30c6\u30c3\u30d71\uff1a\u8ca0\u8377\u96fb\u6d41\uff08Ib\uff09\u3092\u8a08\u7b97\u3059\u308b<\/h3>\n<p>\u56de\u8def\u306e\u5168\u8ca0\u8377\u96fb\u6d41\u3092\u6c7a\u5b9a\u3057\u307e\u3059\u3002.<\/p>\n<ul>\n<li><em>\u5f0f\uff083\u76f8\uff09\uff1a<\/em> $I = P \/ (\\sqrt{3} \\times V \\times PF)$<\/li>\n<li>\u5b89\u5168\u7387\u3092\u9069\u7528\u3057\u307e\u3059\uff08\u901a\u5e38\u3001NEC \/ IEC\u306e\u63a8\u5968\u4e8b\u9805\u306b\u5f93\u3063\u3066\u3001\u9023\u7d9a\u8ca0\u8377\u306e\u5834\u5408\u306f125%\uff09\u3002.<\/li>\n<\/ul>\n<h3>\u30b9\u30c6\u30c3\u30d72\uff1a\u4e88\u60f3\u77ed\u7d61\u96fb\u6d41\uff08PSCC\uff09\u3092\u6c7a\u5b9a\u3059\u308b<\/h3>\n<p>\u8a2d\u7f6e\u5834\u6240\u3067\u306e\u6545\u969c\u96fb\u6d41\u3092\u8a08\u7b97\u3057\u307e\u3059\u3002 MCCB\u306e <strong>\u30a4\u30af<\/strong> \u306f\u3001\u3053\u306e\u5024\u3088\u308a\u5927\u304d\u304f\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002.<\/p>\n<ul>\n<li><em>\u6ce8\uff1a<\/em> PSCC\u304c45kA\u306e\u5834\u5408\u300136kA\u306e\u30d6\u30ec\u30fc\u30ab\u30fc\u3092\u9078\u629e\u3057\u306a\u3044\u3067\u304f\u3060\u3055\u3044\u3002 50kA\u307e\u305f\u306f70kA\u30e2\u30c7\u30eb\u3092\u9078\u629e\u3057\u3066\u304f\u3060\u3055\u3044\u3002.<\/li>\n<\/ul>\n<h3>\u30b9\u30c6\u30c3\u30d73\uff1a\u30d5\u30ec\u30fc\u30e0\u30b5\u30a4\u30ba\u3068\u30c8\u30ea\u30c3\u30d7\u5b9a\u683c\u3092\u9078\u629e\u3059\u308b<\/h3>\n<p>\u5fc5\u8981\u306a\u96fb\u6d41\u306b\u5bfe\u5fdc\u3057\u3001\u5fc5\u8981\u306a\u906e\u65ad\u5bb9\u91cf\u3092\u63d0\u4f9b\u3059\u308b\u30d5\u30ec\u30fc\u30e0\u30b5\u30a4\u30ba\u3092\u9078\u629e\u3057\u3066\u304f\u3060\u3055\u3044\u3002.<\/p>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/Comparative-technical-illustration-of-three-MCCB-frame-sizes-showing-dimensional-specifications-and-terminal-configurations.webp\" alt=\"Comparative technical illustration of three MCCB frame sizes showing dimensional specifications and terminal configurations\" \/><figcaption style=\"font-style: italic; color: #555; margin-top: 8px;\">\u5bf8\u6cd5\u3068\u7aef\u5b50\u69cb\u6210\u3092\u793a\u3059MCCB\u30d5\u30ec\u30fc\u30e0\u30b5\u30a4\u30ba\u306e\u6bd4\u8f03\uff08100A\u3001250A\u3001630A\uff09\u3002.<\/figcaption><\/figure>\n<h3>\u30b9\u30c6\u30c3\u30d74\uff1a\u30c7\u30a3\u30ec\u30fc\u30c6\u30a3\u30f3\u30b0\u30d5\u30a1\u30af\u30bf\u30fc\u3092\u9069\u7528\u3059\u308b<\/h3>\n<p>MCCB\u306f\u901a\u5e3840\u00b0C\u3067\u6821\u6b63\u3055\u308c\u3066\u3044\u307e\u3059\u3002 \u3088\u308a\u9ad8\u6e29\u306e\u30d1\u30cd\u30eb\u307e\u305f\u306f\u9ad8\u5730\u306b\u53d6\u308a\u4ed8\u3051\u308b\u5834\u5408\u306f\u3001\u5bb9\u91cf\u3092\u30c7\u30a3\u30ec\u30fc\u30c6\u30a3\u30f3\u30b0\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002 \u79c1\u305f\u3061\u306e <a href=\"https:\/\/test.viox.com\/ja\/electrical-derating-temperature-altitude-grouping-factors\/\">\u96fb\u6c17\u30c7\u30a3\u30ec\u30fc\u30c6\u30a3\u30f3\u30b0\u30ac\u30a4\u30c9\u3092\u3054\u89a7\u304f\u3060\u3055\u3044<\/a>.<\/p>\n<p><strong>\u6e29\u5ea6\u30c7\u30a3\u30ec\u30fc\u30c6\u30a3\u30f3\u30b0\u30c6\u30fc\u30d6\u30eb\uff08\u71b1\u78c1\u5f0fMCCB\u306e\u4f8b\uff09\uff1a<\/strong><\/p>\n<table style=\"border-collapse: collapse; width: 100%; border: 1px solid #ddd; text-align: center;\" border=\"1\" cellspacing=\"0\" cellpadding=\"8\">\n<thead>\n<tr style=\"background-color: #f2f2f2;\">\n<th style=\"text-align: left;\">\u5468\u56f2\u6e29\u5ea6\uff08\u00b0C\uff09<\/th>\n<th>30\u00b0C<\/th>\n<th>40\u00b0C\uff08\u57fa\u6e96\uff09<\/th>\n<th>50\u00b0C<\/th>\n<th>60\u00b0C<\/th>\n<th>70\u2103<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"text-align: left;\"><strong>\u88dc\u6b63\u4fc2\u6570<\/strong><\/td>\n<td>1.10<\/td>\n<td>1.00<\/td>\n<td>0.90<\/td>\n<td>0.80<\/td>\n<td>0.70<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>\u30b9\u30c6\u30c3\u30d75\uff1a\u5354\u8abf\uff08\u9078\u629e\u906e\u65ad\uff09\u3092\u78ba\u8a8d\u3059\u308b<\/h3>\n<p>\u4e0b\u6d41\u306e\u6545\u969c\u304c\u30c8\u30ea\u30c3\u30d7\u3059\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044 <em>\u306e\u307f<\/em> \u30e1\u30a4\u30f3MCCB\u3067\u306f\u306a\u304f\u3001\u4e0b\u6d41\u306e\u30d6\u30ec\u30fc\u30ab\u30fc\u3002.<\/p>\n<ul>\n<li><strong>\u96fb\u6d41\u9078\u629e\u906e\u65ad\uff1a<\/strong> \u4e0a\u6d41MCCB\u30c8\u30ea\u30c3\u30d7\u3057\u304d\u3044\u5024&gt;\u4e0b\u6d41\u30d6\u30ec\u30fc\u30ab\u30fc\u30c8\u30ea\u30c3\u30d7\u3057\u304d\u3044\u5024\u3002.<\/li>\n<li><strong>\u6642\u9593\u9078\u629e\u906e\u65ad\uff1a<\/strong> \u96fb\u5b50\u5f0f\u30c8\u30ea\u30c3\u30d7\u30e6\u30cb\u30c3\u30c8\u3092\u4f7f\u7528\u3057\u3066\u3001\u4e0a\u6d41\u306eMCCB\u306b\u9045\u5ef6\u6642\u9593\uff08\u30ab\u30c6\u30b4\u30eaB\u30d6\u30ec\u30fc\u30ab\u30fc\uff09\u3092\u8ffd\u52a0\u3057\u307e\u3059\u3002.<\/li>\n<li>\u8a73\u7d30\u306b\u3064\u3044\u3066\u306f\u3001 <a href=\"https:\/\/test.viox.com\/ja\/what-is-breaker-selectivity-coordination-guide\/\">\u30d6\u30ec\u30fc\u30ab\u30fc\u306e\u9078\u629e\u906e\u65ad\u3068\u5354\u8abf\u30ac\u30a4\u30c9\u3092\u3054\u89a7\u304f\u3060\u3055\u3044<\/a>.<\/li>\n<\/ul>\n<h2>\u30b5\u30a4\u30ba\u8a2d\u5b9a\u306e\u8a08\u7b97\u4f8b<\/h2>\n<p><strong>\u30b7\u30ca\u30ea\u30aa<\/strong> \u8a08\u7b97\u3055\u308c\u305f\u8ca0\u8377\u304c180A\u306e\u30b5\u30d6\u30d1\u30cd\u30eb\u306e3\u76f8\u30d5\u30a3\u30fc\u30c0\u30fc\u3092\u4fdd\u8b77\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002 \u30b7\u30b9\u30c6\u30e0\u96fb\u5727\u306f415V AC\u3067\u3059\u3002 \u6bcd\u7dda\u3067\u306e\u8a08\u7b97\u3055\u308c\u305f\u77ed\u7d61\u96fb\u6d41\u306f32kA\u3067\u3059\u3002 \u30d1\u30cd\u30eb\u306e\u5185\u90e8\u6e29\u5ea6\u306f50\u00b0C\u306b\u306a\u308b\u3068\u4e88\u60f3\u3055\u308c\u307e\u3059\u3002.<\/p>\n<ol>\n<li><strong>\u8ca0\u8377\u8981\u4ef6\uff1a<\/strong> $I_b = 180A$\u3002.<\/li>\n<li><strong>\u30c7\u30a3\u30ec\u30fc\u30c6\u30a3\u30f3\u30b0\u30c1\u30a7\u30c3\u30af\uff1a<\/strong> 50\u00b0C\u3067\u306f\u3001\u30c7\u30a3\u30ec\u30fc\u30c6\u30a3\u30f3\u30b0\u30d5\u30a1\u30af\u30bf\u30fc\u306f0.9\u3067\u3059\u3002.\n<ul>\n<li>\u5fc5\u8981\u306a\u516c\u79f0\u5b9a\u683c= $180A \/ 0.9 = 200A$\u3002.<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u30d5\u30ec\u30fc\u30e0\u306e\u9078\u629e\uff1a<\/strong> \u9078\u629e\u3057\u3066\u304f\u3060\u3055\u3044 <strong>250A\u30d5\u30ec\u30fc\u30e0<\/strong> MCCB\uff08200A\u304b\u3089\u306e\u6b21\u306e\u6a19\u6e96\u30b5\u30a4\u30ba\uff09\u3002.<\/li>\n<li><strong>\u30c8\u30ea\u30c3\u30d7\u30e6\u30cb\u30c3\u30c8\u306e\u8a2d\u5b9a\uff1a<\/strong> 250A\u30c8\u30ea\u30c3\u30d7\u30e6\u30cb\u30c3\u30c8\u3001\u307e\u305f\u306f0.8 x In\uff08$250 \\times 0.8 = 200A$\uff09\u306b\u8a2d\u5b9a\u3055\u308c\u305f\u8abf\u6574\u53ef\u80fd\u306a250A\u96fb\u5b50\u30c8\u30ea\u30c3\u30d7\u30e6\u30cb\u30c3\u30c8\u3092\u9078\u629e\u3057\u3066\u304f\u3060\u3055\u3044\u3002.<\/li>\n<li><strong>\u7834\u65ad\u80fd\u529b\uff1a<\/strong> $PSCC = 32kA$\u3002.\n<ul>\n<li>\u6b21\u306eMCCB\u3092\u9078\u629e\u3057\u3066\u304f\u3060\u3055\u3044 <strong>Icu = 36kA<\/strong> \u307e\u305f\u306f <strong>50kA<\/strong> \uff08\u6a19\u6e96\u306e25kA\u3067\u306f\u4e0d\u5341\u5206\u3067\u3059\uff09\u3002.<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u6700\u7d42\u9078\u5b9a\uff1a<\/strong> VIOX VMM3-250H\uff08\u9ad8\u906e\u65ad\u5bb9\u91cf\uff09\u30013\u6975\u3001250A\u3001\u96fb\u5b50\u5f0f\u30c8\u30ea\u30c3\u30d7\u30e6\u30cb\u30c3\u30c8\u3002.<\/li>\n<\/ol>\n<h2>\u4e00\u822c\u7684\u306a\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u3068\u9593\u9055\u3044<\/h2>\n<ul>\n<li><strong>\u8ff7\u60d1\u306a\u3064\u307e\u305a\u304d:<\/strong> \u30e2\u30fc\u30bf\u30fc\u7a81\u5165\u96fb\u6d41\u306b\u5bfe\u3057\u3066\u78c1\u6c17\u30c8\u30ea\u30c3\u30d7\uff08Im\uff09\u306e\u8a2d\u5b9a\u304c\u4f4e\u3059\u304e\u308b\u5834\u5408\u306b\u591a\u304f\u767a\u751f\u3057\u307e\u3059\u3002 \u4e00\u822c\u7684\u306a\u30e2\u30fc\u30bf\u30fc\u4fdd\u8b77\u66f2\u7dda\u306b\u5207\u308a\u66ff\u3048\u308b\u304b\u3001\u77ac\u6642\u8a2d\u5b9a\u3092\u8abf\u6574\u3057\u3066\u304f\u3060\u3055\u3044\u3002.<\/li>\n<li><strong>\u30aa\u30fc\u30d0\u30fc\u30d2\u30fc\u30c8\uff1a<\/strong> \u7aef\u5b50\u7de0\u3081\u4ed8\u3051\u30c8\u30eb\u30af\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u63a5\u7d9a\u306e\u7de9\u307f\u306fMCCB\u6545\u969c\u306e\u6700\u3082\u4e00\u822c\u7684\u306a\u539f\u56e0\u3067\u3059\u3002.<\/li>\n<li><strong>\u30d6\u30ec\u30fc\u30ab\u30fc\u304c\u30ea\u30bb\u30c3\u30c8\u3057\u306a\u3044\u5834\u5408\uff1a<\/strong> \u6a5f\u69cb\u304c\u300c\u30c8\u30ea\u30c3\u30d7\u300d\u4f4d\u7f6e\uff08\u4e2d\u592e\uff09\u306b\u3042\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u300cON\u300d\u306b\u5207\u308a\u66ff\u3048\u308b\u524d\u306b\u3001\u30cf\u30f3\u30c9\u30eb\u3092\u3057\u3063\u304b\u308a\u3068\u300cOFF\u300d\uff08\u30ea\u30bb\u30c3\u30c8\uff09\u306e\u4f4d\u7f6e\u307e\u3067\u52d5\u304b\u3059\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002.<\/li>\n<li><strong>\u30d6\u30fc\u30f3\u3068\u3044\u3046\u97f3\uff1a<\/strong> \u5927\u96fb\u6d41\u306e\u5834\u5408\u3001\u308f\u305a\u304b\u306a\u30cf\u30e0\u97f3\u306f\u6b63\u5e38\u3067\u3059\u304c\u3001\u5927\u304d\u306a\u30d6\u30fc\u30f3\u3068\u3044\u3046\u97f3\u306f\u3001\u7a4d\u5c64\u9244\u5fc3\u307e\u305f\u306f\u63a5\u70b9\u306e\u7de9\u307f\u3092\u793a\u3057\u3066\u3044\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u5f0a\u793e\u306e <a href=\"https:\/\/test.viox.com\/ja\/why-is-my-circuit-breaker-making-a-buzzing-sound-an-engineering-diagnostic-guide\/\">\u30d6\u30fc\u30f3\u3068\u3044\u3046\u97f3\u306e\u3059\u308b\u30d6\u30ec\u30fc\u30ab\u30fc\u306e\u8a3a\u65ad\u30ac\u30a4\u30c9\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<\/a>.<\/li>\n<\/ul>\n<h2>\u3088\u304f\u3042\u308b\u3054\u8cea\u554f<\/h2>\n<p><strong>Q: AC MCCB\u3092DC\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u4f7f\u7528\u3067\u304d\u307e\u3059\u304b\uff1f<\/strong><br \/>\nA: \u4e00\u822c\u7684\u306b\u3001\u3067\u304d\u307e\u305b\u3093\u3002DC\u30a2\u30fc\u30af\u306f\u6d88\u5f27\u304c\u56f0\u96e3\u3067\u3059\u3002DC\u7528\u306b\u5b9a\u683c\u3055\u308c\u305fMCCB\u3092\u4f7f\u7528\u3059\u308b\u304b\u3001\u305d\u306e\u30e2\u30c7\u30eb\u306e\u30e1\u30fc\u30ab\u30fc\u306eDC\u5b9a\u683c\u3092\u78ba\u8a8d\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002 <a href=\"https:\/\/test.viox.com\/ja\/dc-vs-ac-circuit-breakers-essential-differences-for-electrical-safety\/\">DC\u5bfeAC\u56de\u8def\u30d6\u30ec\u30fc\u30ab\u30fc\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<\/a>.<\/p>\n<p><strong>Q: 3P\u30684P\u306eMCCB\u306e\u9055\u3044\u306f\u4f55\u3067\u3059\u304b\uff1f<\/strong><br \/>\nA: 3P\u306f3\u3064\u306e\u76f8\uff08L1\u3001L2\u3001L3\uff09\u3092\u4fdd\u8b77\u3057\u307e\u3059\u30024P\u306f\u4e2d\u6027\u7dda\u306e\u4fdd\u8b77\u3092\u542b\u307f\u3001\u4e2d\u6027\u7dda\u304c\u914d\u96fb\u3055\u308c\u3001\u9ad8\u8abf\u6ce2\u96fb\u6d41\u304c\u4e88\u60f3\u3055\u308c\u308b\u5834\u5408\u306b\u4e0d\u53ef\u6b20\u3067\u3059\u3002.<\/p>\n<p><strong>Q: MCCB\u3092\u30c6\u30b9\u30c8\u3059\u308b\u306b\u306f\u3069\u3046\u3059\u308c\u3070\u3088\u3044\u3067\u3059\u304b\uff1f<\/strong><br \/>\nA: \u300c\u30c6\u30b9\u30c8\u300d\u30dc\u30bf\u30f3\u306f\u3001\u6a5f\u68b0\u7684\u306a\u30c8\u30ea\u30c3\u30d7\u6a5f\u69cb\u306e\u307f\u3092\u30c1\u30a7\u30c3\u30af\u3057\u307e\u3059\u3002\u96fb\u5b50\/\u71b1\u7684\u306a\u7cbe\u5ea6\u3092\u78ba\u8a8d\u3059\u308b\u306b\u306f\u3001\u4e8c\u6b21\u6ce8\u5165\u8a66\u9a13\u304c\u5fc5\u8981\u3067\u3059\u3002 <a href=\"https:\/\/test.viox.com\/ja\/how-to-really-test-mccb-test-button-lie\/\">MCCB\u3092\u5b9f\u969b\u306b\u30c6\u30b9\u30c8\u3059\u308b\u65b9\u6cd5\u3092\u304a\u8aad\u307f\u304f\u3060\u3055\u3044\u3002<\/a>.<\/p>\n<p><strong>Q: MCCB\u3068ICCB\u306e\u3069\u3061\u3089\u3092\u4f7f\u7528\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u304b\uff1f<\/strong><br \/>\nA: ICCB\uff08\u7d76\u7e01\u30b1\u30fc\u30b9\u56de\u8def\u30d6\u30ec\u30fc\u30ab\u30fc\uff09\u306f\u3001\u901a\u5e38\u3001\u3088\u308a\u9ad8\u3044\u96fb\u6d41\uff08\u6700\u59274000A\uff09\u306b\u4f7f\u7528\u3055\u308c\u3001\u6a19\u6e96\u306eMCCB\u3088\u308a\u3082\u9ad8\u3044\u77ed\u6642\u9593\u8010\u96fb\u6d41\u5b9a\u683c\uff08Icw\uff09\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u5f0a\u793e\u306e <a href=\"https:\/\/test.viox.com\/ja\/mccb-vs-iccb-comprehensive-guide\/\">MCCB\u5bfeICCB\u30ac\u30a4\u30c9\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<\/a>.<\/p>\n<p><strong>Q: MCCB \u306f\u3069\u306e\u304f\u3089\u3044\u306e\u983b\u5ea6\u3067\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u304b?<\/strong><br \/>\nA: MCCB\u306fACB\u3068\u6bd4\u8f03\u3057\u3066\u300c\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u30d5\u30ea\u30fc\u300d\u3067\u3059\u304c\u3001\u6bce\u5e74\u76ee\u8996\u691c\u67fb\u3092\u884c\u3044\u3001\u63a5\u7d9a\u306e\u7de9\u307f\u3092\u691c\u51fa\u3059\u308b\u305f\u3081\u306b\u30b5\u30fc\u30e2\u30b0\u30e9\u30d5\u30a3\u30fc\u30b9\u30ad\u30e3\u30f3\u3092\u5b9f\u884c\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n<h2>\u8981\u70b9<\/h2>\n<ul>\n<li><strong>\u5b89\u5168\u7b2c\u4e00\uff1a<\/strong> \u5e38\u306b\u3001\u8a2d\u7f6e\u5834\u6240\u3067\u306e\u6f5c\u5728\u7684\u306a\u77ed\u7d61\u96fb\u6d41\uff08PSCC\uff09\u3088\u308a\u3082\u9ad8\u3044 <strong>\u30a4\u30af<\/strong> \u5b9a\u683c\u306eMCCB\u3092\u9078\u629e\u3057\u3066\u304f\u3060\u3055\u3044\u3002.<\/li>\n<li><strong>\u5c06\u6765\u3092\u898b\u636e\u3048\u305f\u8a2d\u8a08\uff1a<\/strong> \u5c06\u6765\u306e\u8ca0\u8377\u5909\u66f4\u3068\u3088\u308a\u826f\u3044\u5354\u8abf\u306e\u305f\u3081\u306b\u3001\u91cd\u8981\u306a\u30d1\u30cd\u30eb\u306b\u306f\u8abf\u6574\u53ef\u80fd\u306a\u96fb\u5b50\u30c8\u30ea\u30c3\u30d7\u30e6\u30cb\u30c3\u30c8\u3092\u9078\u629e\u3057\u3066\u304f\u3060\u3055\u3044\u3002.<\/li>\n<li><strong>\u74b0\u5883\u304c\u91cd\u8981\uff1a<\/strong> \u6e29\u5ea6\u3068\u9ad8\u5ea6\u306e\u30c7\u30a3\u30ec\u30fc\u30c6\u30a3\u30f3\u30b0\u4fc2\u6570\u3092\u7121\u8996\u3057\u306a\u3044\u3067\u304f\u3060\u3055\u3044\u3002\u30d6\u30ec\u30fc\u30ab\u30fc\u304c\u65e9\u671f\u306b\u30c8\u30ea\u30c3\u30d7\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002.<\/li>\n<li><strong>\u8abf\u6574\uff1a<\/strong> \u30e1\u30a4\u30f3\u306eMCCB\u304c\u3001\u4e0b\u6d41\u306eMCB\u304c\u8efd\u5fae\u306a\u6545\u969c\u3092\u9664\u53bb\u3059\u308b\u306e\u306b\u5341\u5206\u306a\u6642\u9593\u3060\u3051\u30c8\u30ea\u30c3\u30d7\u3092\u9045\u3089\u305b\u308b\u3088\u3046\u306b\u3057\u3066\u304f\u3060\u3055\u3044\uff08\u9078\u629e\u906e\u65ad\uff09\u3002.<\/li>\n<\/ul>\n<p>\u9069\u5207\u306aMCCB\u306e\u9078\u629e\u306f\u3001\u5b89\u5168\u6027\u3001\u6a5f\u80fd\u6027\u3001\u304a\u3088\u3073\u30b3\u30b9\u30c8\u306e\u30d0\u30e9\u30f3\u30b9\u3067\u3059\u3002\u3053\u306e\u30ac\u30a4\u30c9\u306b\u5f93\u3044\u3001 <strong>IEC 60947-2<\/strong> \u898f\u683c\u3092\u9075\u5b88\u3059\u308b\u3053\u3068\u3067\u3001\u4eba\u54e1\u3068\u6a5f\u5668\u306e\u4e21\u65b9\u3092\u4fdd\u8b77\u3059\u308b\u5805\u7262\u306a\u96fb\u6c17\u30a4\u30f3\u30d5\u30e9\u30b9\u30c8\u30e9\u30af\u30c1\u30e3\u3092\u78ba\u4fdd\u3067\u304d\u307e\u3059\u3002.<\/p>\n<\/div>\n<div class=\"simg-pop-btn\" style=\"top: 2247.55px; left: 14px; display: none;\"><\/div>\n<div class=\"simg-pop-btn\" style=\"top: 2247.55px; left: 14px; display: none;\"><\/div>","protected":false},"excerpt":{"rendered":"<p>Selecting the right Molded Case Circuit Breaker (MCCB) is a critical engineering decision that directly impacts the safety, reliability, and compliance of your electrical distribution system. Unlike standard residential breakers, MCCBs are designed for high-power industrial and commercial applications, offering adjustable protection settings and high breaking capacities in accordance with IEC 60947-2. An incorrectly selected MCCB can lead to nuisance tripping, equipment damage, or catastrophic failure during a short circuit. This ultimate guide will walk you through the technical selection process, from calculating fault currents to verifying selectivity, ensuring you choose the perfect MCCB for your panel. What is an MCCB and Why Use It? A Molded Case Circuit Breaker [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":16692,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-16685","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/test.viox.com\/ja\/wp-json\/wp\/v2\/posts\/16685","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/test.viox.com\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/test.viox.com\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/test.viox.com\/ja\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/test.viox.com\/ja\/wp-json\/wp\/v2\/comments?post=16685"}],"version-history":[{"count":2,"href":"https:\/\/test.viox.com\/ja\/wp-json\/wp\/v2\/posts\/16685\/revisions"}],"predecessor-version":[{"id":21362,"href":"https:\/\/test.viox.com\/ja\/wp-json\/wp\/v2\/posts\/16685\/revisions\/21362"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/test.viox.com\/ja\/wp-json\/wp\/v2\/media\/16692"}],"wp:attachment":[{"href":"https:\/\/test.viox.com\/ja\/wp-json\/wp\/v2\/media?parent=16685"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/test.viox.com\/ja\/wp-json\/wp\/v2\/categories?post=16685"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/test.viox.com\/ja\/wp-json\/wp\/v2\/tags?post=16685"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}