{"id":11514,"date":"2026-09-11T03:29:09","date_gmt":"2026-09-10T19:29:09","guid":{"rendered":"https:\/\/subian-electric.com\/?p=11514"},"modified":"2026-09-11T03:30:40","modified_gmt":"2026-09-10T19:30:40","slug":"unifilar-diagram-for-a-500-kva-transformer-in-the-united-states","status":"publish","type":"post","link":"https:\/\/subian-electric.com\/ja\/blog\/unifilar-diagram-for-a-500-kva-transformer-in-the-united-states\/","title":{"rendered":"\u30a2\u30e1\u30ea\u30ab\u5408\u8846\u56fd\u306b\u304a\u3051\u308b500 kVA\u5909\u5727\u5668\u306e\u30e6\u30cb\u30d5\u30a3\u30e9\u30fc\u30c0\u30a4\u30a2\u30b0\u30e9\u30e0"},"content":{"rendered":"<p>\u300c\u30e6\u30cb\u30d5\u30a1\u30a4\u30e9\u56f3\u300d\u3068\u3044\u3046\u7528\u8a9e\u306f\u3001\u30a2\u30e1\u30ea\u30ab\u5408\u8846\u56fd\u3067\u306f\u300c\u5358\u7dda\u56f3\u300d\u3068\u547c\u3070\u308c\u3001500 kVA \u30c8\u30e9\u30f3\u30b9\u304c\u96fb\u529b\u30b7\u30b9\u30c6\u30e0\u306b\u3069\u306e\u3088\u3046\u306b\u63a5\u7d9a\u3055\u308c\u308b\u304b\u3092\u793a\u3059\u56f3\u3092\u6307\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u306f\u3001\u96fb\u529b\u4f1a\u793e\u306e\u96fb\u6e90\u3001\u4e00\u6b21\u4fdd\u8b77\u306e\u65b9\u6cd5\u3001\u30c8\u30e9\u30f3\u30b9\u81ea\u4f53\u306e\u5b9a\u683c\u3001\u4fdd\u8b77\u3001\u4e8c\u6b21\u306e\u914d\u96fb\u3001\u304a\u3088\u3073\u63a5\u5730\u306e\u65b9\u6cd5\u304c\u542b\u307e\u308c\u307e\u3059\u3002\u3053\u306e\u3088\u3046\u306a\u30c8\u30e9\u30f3\u30b9\u306e\u5358\u7dda\u56f3\u306f\u91cd\u8981\u3067\u3042\u308a\u3001\u3053\u308c\u306f\u96fb\u529b\u4f1a\u793e\u3068\u7ba1\u8f44\u6a29\u3092\u6301\u3064\u5f53\u5c40\uff08AHJ\uff09\u304c\u8a08\u753b\u3092\u627f\u8a8d\u3059\u308b\u305f\u3081\u306e\u6700\u3082\u91cd\u8981\u306a\u30dd\u30a4\u30f3\u30c8\u306e\u4e00\u3064\u3067\u3059\u3002\u3053\u306e\u30ac\u30a4\u30c9\u3067\u306f\u3001\u5178\u578b\u7684\u306a\u30ec\u30a4\u30a2\u30a6\u30c8\u3001\u56f3\u9762\u4f5c\u6210\u306e\u8a73\u7d30\u306a\u624b\u9806\u3001\u5fc5\u8981\u306a\u8a08\u7b97\u3001\u91cd\u8981\u306a\u6ce8\u610f\u4e8b\u9805\u3001\u304a\u3088\u3073\u3053\u306e\u30d7\u30ed\u30bb\u30b9\u3067\u306e\u9593\u9055\u3044\u306b\u3064\u3044\u3066\u7406\u89e3\u3092\u6df1\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002.<\/p>\n<blockquote><p>\u6982\u8981\uff1a\u30a2\u30e1\u30ea\u30ab\u3067\u306f\u3001500 kVA \u30c8\u30e9\u30f3\u30b9\u306e\u5358\u7dda\u56f3\u306f\u4f53\u7cfb\u7684\u306a\u9806\u5e8f\u306b\u5f93\u3044\u307e\u3059\u3002\u3053\u306e\u9806\u5e8f\u306b\u306f\u3001\u96fb\u529b\u30b5\u30fc\u30d3\u30b9\u3068\u30e1\u30fc\u30bf\u30fc\u3001\u30b5\u30fc\u30d3\u30b9\u5207\u65ad\u3001\u4e00\u6b21\u30d5\u30a3\u30fc\u30c0\u30fc\u3001NEC \u8868 450.3(B) \u306b\u5f93\u3063\u305f\u4e00\u6b21\u904e\u8ca0\u8377\u4fdd\u8b77\u3001kVA \u5b9a\u683c\u306e\u30c8\u30e9\u30f3\u30b9\u3001\u4e00\u6b21\u304a\u3088\u3073\u4e8c\u6b21\u96fb\u5727\u3001\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u3001\u30d9\u30af\u30c8\u30eb\u30b0\u30eb\u30fc\u30d7\u3001\u30bf\u30c3\u30d7\u3001BIL\u3001\u304a\u3088\u3073\u6e29\u5ea6\u4e0a\u6607\uff1b\u4e8c\u6b21\u56de\u8def\u306e\u904e\u96fb\u6d41\u4fdd\u8b77\uff1b\u4e8c\u6b21\u30d5\u30a3\u30fc\u30c0\u30fc\u307e\u305f\u306f\u30d0\u30b9\u30a6\u30a7\u30a4\uff1b\u304a\u3088\u3073\u63a5\u5730\u304a\u3088\u3073\u30dc\u30f3\u30c7\u30a3\u30f3\u30b0\u5c0e\u4f53\u3068\u306e\u63a5\u7d9a\u306b\u304a\u3051\u308b\u914d\u96fb\u76e4\u306e\u8a2d\u7f6e\u304c\u542b\u307e\u308c\u307e\u3059\u3002.<\/p><\/blockquote>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-11515\" src=\"https:\/\/subian-electric.com\/wp-content\/uploads\/2026\/09\/Unifilar-Diagram-for-a-500-kVA-Transformer-in-the-United-States.webp\" alt=\"\u30a2\u30e1\u30ea\u30ab\u5408\u8846\u56fd\u306b\u304a\u3051\u308b500 kVA\u5909\u5727\u5668\u306e\u30e6\u30cb\u30d5\u30a3\u30e9\u30fc\u30c0\u30a4\u30a2\u30b0\u30e9\u30e0\" width=\"1448\" height=\"1086\" \/><\/p>\n<h2>\u30e6\u30cb\u30d5\u30a1\u30a4\u30e9\uff08\u5358\u7dda\uff09\u56f3\u3068\u306f\u4e00\u4f53\u4f55\u3067\u3059\u304b\uff1f<\/h2>\n<p>\u30e6\u30cb\u30d5\u30a1\u30a4\u30e9\u56f3\u306f\u3001\u4e09\u76f8\u96fb\u529b\u30b7\u30b9\u30c6\u30e0\u3092\u793a\u3059\u305f\u3081\u306b\u3001\u3059\u3079\u3066\u306e\u4e09\u76f8\u3092\u793a\u3059\u305f\u3081\u306b1\u672c\u306e\u7dda\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u5404\u30dd\u30a4\u30f3\u30c8\u30673\u672c\u306e\u30ef\u30a4\u30e4\u3092\u63cf\u304f\u4ee3\u308f\u308a\u306b\u3001\u96fb\u6c17\u6280\u5e2b\u304c1\u672c\u306e\u7dda\u3092\u4f7f\u7528\u3057\u3001\u305d\u306e\u7dda\u5185\u3067\u30ef\u30a4\u30e4\u306e\u672c\u6570\u3001\u30ef\u30a4\u30e4\u306e\u30b5\u30a4\u30ba\u3001\u304a\u3088\u3073\u8a2d\u7f6e\u306b\u4f7f\u7528\u3055\u308c\u308b\u30ec\u30fc\u30b9\u30a6\u30a7\u30a4\u3092\u8aac\u660e\u3059\u308b\u3053\u3068\u3092\u610f\u5473\u3057\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001\u300c3-500 kcmil THHN + 1-250 kcmil GND in 2 \u00d7 3\u2033 EMT\u300d\u3068\u306a\u308a\u307e\u3059\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u56f3\u306f\u30b3\u30f3\u30d1\u30af\u30c8\u3067\u30011\u679a\u306e\u7d19\u306b\u53ce\u307e\u308a\u3001\u8acb\u8ca0\u696d\u8005\u3001\u691c\u67fb\u5b98\u3001\u304a\u3088\u3073\u96fb\u6c17\u4f1a\u793e\u304c\u30b7\u30b9\u30c6\u30e0\u306e\u8a2d\u7f6e\u65b9\u6cd5\u3092\u7406\u89e3\u3059\u308b\u306e\u306b\u5341\u5206\u3067\u3059\u3002.<\/p>\n<table>\n<tbody>\n<tr>\n<th>\u8981\u7d20<\/th>\n<th>\u5358\u7dda\u3067\u306e\u8868\u793a\u65b9\u6cd5<\/th>\n<\/tr>\n<tr>\n<td>\u5909\u5727\u5668<\/td>\n<td>kVA\u3001\u96fb\u5727\u3001\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u3001\u304a\u3088\u3073\u30d9\u30af\u30c8\u30eb\u30b0\u30eb\u30fc\u30d7\u304c\u6ce8\u91c8\u3055\u308c\u305f2\u3064\u306e\u76f8\u4e92\u306b\u7d61\u307f\u5408\u3063\u305f\u5186\uff08\u307e\u305f\u306f\u9577\u65b9\u5f62\u306e\u8a18\u53f7\uff09<\/td>\n<\/tr>\n<tr>\n<td>\u56de\u8def\u30d6\u30ec\u30fc\u30ab\u30fc<\/td>\n<td>\u30c8\u30ea\u30c3\u30d7\u5b9a\u683c\u304a\u3088\u3073\u906e\u65ad\u5b9a\u683c\uff08AIC\uff09\u306e\u3042\u308b\u56db\u89d2\u5f62\u307e\u305f\u306f\u300cCB\u300d\u306e\u6587\u5b57<\/td>\n<\/tr>\n<tr>\n<td>\u30d2\u30e5\u30fc\u30ba<\/td>\n<td>\u30d2\u30e5\u30fc\u30ba\u8a18\u53f7\u306e\u3042\u308b\u77ed\u3044\u7dda\u3001\u30d2\u30e5\u30fc\u30ba\u306e\u7a2e\u985e\u3068\u30a2\u30f3\u30da\u30a2\u5b9a\u683c<\/td>\n<\/tr>\n<tr>\n<td>\u5207\u65ad\u30b9\u30a4\u30c3\u30c1<\/td>\n<td>\u30a2\u30f3\u30da\u30a2\u5b9a\u683c\u304a\u3088\u3073NEMA\u30a8\u30f3\u30af\u30ed\u30fc\u30b8\u30e3\u30bf\u30a4\u30d7\u306e\u3042\u308b\u30d6\u30ec\u30fc\u30c9\u8a18\u53f7<\/td>\n<\/tr>\n<tr>\n<td>\u8a08\u6e2c<\/td>\n<td>\u96fb\u6d41\u5909\u5727\u5668\uff08CT\uff09\u304a\u3088\u3073\u96fb\u5727\u5909\u5727\u5668\uff08PT\uff09\u304c\u7dda\u4e0a\u306b\u5186\u3068\u3057\u3066\u793a\u3055\u308c\u308b<\/td>\n<\/tr>\n<tr>\n<td>\u63a5\u5730<\/td>\n<td>\u63a5\u5730\u96fb\u6975\u8a18\u53f7\u306e\u3042\u308b\u5225\u306e\u5c0e\u4f53\u30d6\u30e9\u30f3\u30c1<\/td>\n<\/tr>\n<tr>\n<td>\u8ca0\u8377<\/td>\n<td>\u30d0\u30b9\u30a2\u30f3\u30da\u30a2\u304a\u3088\u3073\u5229\u7528\u53ef\u80fd\u306a\u6545\u969c\u96fb\u6d41\u3092\u6301\u3064\u9577\u65b9\u5f62\u306e\u30d1\u30cd\u30eb\u30dc\u30fc\u30c9\u304a\u3088\u3073\u30b9\u30a4\u30c3\u30c1\u30dc\u30fc\u30c9<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u30e6\u30cb\u30d5\u30a1\u30a4\u30e9\u56f3\u306f\u914d\u7dda\u56f3\u3068\u306f\u7570\u306a\u308a\u3001\u7d42\u7aef\u6a5f\u5668\u3092\u793a\u3057\u307e\u305b\u3093\u3002\u3053\u308c\u306f\u3001\u7279\u6027\u3001\u4fdd\u8b77\u88c5\u7f6e\u3001\u914d\u7dda\u3001\u304a\u3088\u3073\u63a5\u5730\u30b7\u30b9\u30c6\u30e0\u3092\u8868\u793a\u3059\u308b\u30b7\u30b9\u30c6\u30e0\u30ec\u30d9\u30eb\u306e\u56f3\u306b\u8fd1\u304f\u3001\u8fc5\u901f\u304b\u3064\u7c21\u5358\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u8abf\u6574\u304c\u5f97\u3089\u308c\u308b\u3088\u3046\u306b\u63d0\u793a\u3055\u308c\u307e\u3059\u3002.<\/p>\n<h2>\u7dda\u3092\u63cf\u304f\u524d\u306b\u6570\u5b57\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/h2>\n<p>\u56f3\u306b\u793a\u3055\u308c\u3066\u3044\u308b\u96fb\u6d41\u306f\u3001\u5909\u5727\u5668\u306e\u5b9a\u683c\u8ca0\u8377\u96fb\u6d41\u306b\u57fa\u3065\u3044\u3066\u304a\u308a\u3001500 kVA \u5909\u5727\u5668\u306e\u3053\u306e\u5024\u306e\u8a08\u7b97\u306b\u57fa\u3065\u3044\u3066\u3044\u307e\u3059\u3002\u4e09\u76f8\u306e\u5834\u5408: I = kVA \u00d7 1,000 \u00f7 (\u221a3 \u00d7 V)\u3001\u5358\u76f8\u306e\u5834\u5408: I = kVA \u00d7 1,000 \u00f7 V\u3002.<\/p>\n<table>\n<tbody>\n<tr>\n<th>\u63a5\u7d9a<\/th>\n<th>\u5b9a\u683c\u8ca0\u8377\u96fb\u6d41<\/th>\n<th>\u7c73\u56fd\u306b\u304a\u3051\u308b\u5178\u578b\u7684\u306a\u7528\u9014<\/th>\n<\/tr>\n<tr>\n<td>500 kVA\u3001480 V \u4e09\u76f8\uff08\u4e00\u6b21\uff09<\/td>\n<td>601 A<\/td>\n<td>480 V \u306e\u96fb\u529b\u4f1a\u793e\u307e\u305f\u306f\u30b5\u30fc\u30d3\u30b9\u4f9b\u7d66; \u4e00\u822c\u7684\u306a\u5546\u696d\u4e00\u6b21<\/td>\n<\/tr>\n<tr>\n<td>500 kVA\u3001480Y\/277 V \u4e8c\u6b21<\/td>\n<td>601 A<\/td>\n<td>277 V \u7167\u660e\u3092\u4f34\u3046\u5546\u696d\u914d\u96fb<\/td>\n<\/tr>\n<tr>\n<td>500 kVA\u3001240 V \u0394 \u4e8c\u6b21<\/td>\n<td>1,203 A<\/td>\n<td>\u5de5\u696d\u7528\u304a\u3088\u3073\u65e7\u5f0f\u306e 240 V \u4e09\u76f8\u914d\u96fb<\/td>\n<\/tr>\n<tr>\n<td>500 kVA\u3001208Y\/120 V \u4e8c\u6b21<\/td>\n<td>1,388 A<\/td>\n<td>\u8907\u6570\u4e16\u5e2f\u304a\u3088\u3073\u5546\u696d\u7528 120 V \u30b3\u30f3\u30bb\u30f3\u30c8\/\u7167\u660e\u8ca0\u8377<\/td>\n<\/tr>\n<tr>\n<td>500 kVA\u3001600 V \u4e8c\u6b21<\/td>\n<td>481 A<\/td>\n<td>600 V \u6a5f\u5668\u3092\u6301\u3064\u5de5\u696d\u65bd\u8a2d\uff08\u5730\u57df\uff09<\/td>\n<\/tr>\n<tr>\n<td>500 kVA\u3001240 V \u5358\u76f8\uff08\u30bb\u30f3\u30bf\u30bf\u30c3\u30d7\uff09<\/td>\n<td>2,083 A<\/td>\n<td>\u3053\u306e\u30b5\u30a4\u30ba\u3067\u306f\u7a00 \u2014 \u4eee\u5b9a\u3059\u308b\u524d\u306b\u540d\u677f\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u3053\u308c\u3089\u306e\u6570\u5024\u306e\u80cc\u5f8c\u306b\u3042\u308b\u8ca0\u8377\u8a08\u7b97 \u2014 500 kVA \u306e\u3046\u3061\u5b9f\u969b\u306b\u4f7f\u7528\u3067\u304d\u308b\u91cf\u3001\u9069\u7528\u3055\u308c\u308b\u591a\u69d8\u6027\u304a\u3088\u3073\u9700\u8981\u4fc2\u6570 \u2014 \u306f\u8a2d\u8a08\u306e\u57fa\u790e\u3067\u3042\u308a\u3001\u79c1\u305f\u3061\u306e <a href=\"\/ja\/blog\/transformer-sizing-and-load-calculations\/\">\u5909\u5727\u5668\u306e\u30b5\u30a4\u30ba\u6c7a\u5b9a\u304a\u3088\u3073\u8ca0\u8377\u8a08\u7b97\u30ac\u30a4\u30c9\u3067\u691c\u8a0e\u3055\u308c\u3066\u3044\u307e\u3059<\/a>. \u30d4\u30fc\u30af\u8ca0\u8377 400 kVA \u306e 500 kVA \u5909\u5727\u5668\u306f\u3001\u52b9\u7387\u3068\u5c06\u6765\u306e\u30cb\u30fc\u30ba\u306e\u89b3\u70b9\u304b\u3089\u5b9f\u969b\u306b\u5feb\u9069\u306a 80% \u8ca0\u8377\u3067\u904b\u8ee2\u3057\u3066\u3044\u307e\u3059\u3002.<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-11516\" src=\"https:\/\/subian-electric.com\/wp-content\/uploads\/2026\/09\/The-standard-unifilar-topology-for-a-500-kVA-transformer.webp\" alt=\"500 kVA \u5909\u5727\u5668\u306e\u6a19\u6e96\u30e6\u30cb\u30d5\u30a1\u30a4\u30e9 \u30c8\u30dd\u30ed\u30b8\u30fc\" width=\"1448\" height=\"1086\" \/><\/p>\n<h2>500 kVA \u5909\u5727\u5668\u306e\u6a19\u6e96\u30e6\u30cb\u30d5\u30a1\u30a4\u30e9 \u30c8\u30dd\u30ed\u30b8\u30fc<\/h2>\n<p>\u4ee5\u4e0b\u306f\u30b0\u30e9\u30d5\u30a3\u30c3\u30af\u5185\u306e9\u3064\u306e\u8981\u7d20\u306e\u30ea\u30b9\u30c8\u3067\u3059\uff1a<\/p>\n<table>\n<tbody>\n<tr>\n<th>#<\/th>\n<th>\u8981\u7d20<\/th>\n<th>\u8868\u793a\u3059\u308b\u5185\u5bb9<\/th>\n<\/tr>\n<tr>\n<td>1<\/td>\n<td>\u96fb\u529b\u4f1a\u793e\u306e\u30b5\u30fc\u30d3\u30b9 \/ \u63a5\u7d9a\u30dd\u30a4\u30f3\u30c8<\/td>\n<td>\u5229\u7528\u53ef\u80fd\u306a\u77ed\u7d61\u96fb\u6d41\u3001\u30b5\u30fc\u30d3\u30b9\u96fb\u5727\u3001\u30e1\u30fc\u30bf\u30fc\u4f4d\u7f6e<\/td>\n<\/tr>\n<tr>\n<td>2<\/td>\n<td>\u30b5\u30fc\u30d3\u30b9\u5207\u65ad<\/td>\n<td>\u30a2\u30f3\u30da\u30a2\u5b9a\u683c\u3001NEMA \u30a8\u30f3\u30af\u30ed\u30fc\u30b8\u30e3\u3001\u30d2\u30e5\u30fc\u30ba\u307e\u305f\u306f\u30d6\u30ec\u30fc\u30ab\u30fc\u306e\u7a2e\u985e<\/td>\n<\/tr>\n<tr>\n<td>3<\/td>\n<td>\u30d7\u30e9\u30a4\u30de\u30ea\u30d5\u30a3\u30fc\u30c0\u30fc<\/td>\n<td>\u5c0e\u4f53\u306e\u30b5\u30a4\u30ba\u3001\u6570\u91cf\u3001\u7d76\u7e01\u3001\u30ec\u30fc\u30b9\u30a6\u30a7\u30a4 \u2014 \u30d7\u30e9\u30a4\u30de\u30eaFLA\u306e125%\u306b\u57fa\u3065\u304f\uff08601 A\u306e\u5834\u5408751 A\uff09<\/td>\n<\/tr>\n<tr>\n<td>4<\/td>\n<td>\u30d7\u30e9\u30a4\u30de\u30ea\u904e\u96fb\u6d41\u4fdd\u8b77<\/td>\n<td>NEC\u8868450.3(B)\u306b\u57fa\u3065\u304f\u30c7\u30d0\u30a4\u30b9\u30bf\u30a4\u30d7\u3068\u5b9a\u683c\uff1bAIC\u5b9a\u683c\u306e\u30d2\u30e5\u30fc\u30ba\u307e\u305f\u306f\u30d6\u30ec\u30fc\u30ab\u30fc<\/td>\n<\/tr>\n<tr>\n<td>5<\/td>\n<td>500 kVA\u30c8\u30e9\u30f3\u30b9<\/td>\n<td>kVA\u3001\u30d7\u30e9\u30a4\u30de\u30ea\/\u30bb\u30ab\u30f3\u30c0\u30ea\u96fb\u5727\u3001%Z\u3001\u30d9\u30af\u30c8\u30eb\u30b0\u30eb\u30fc\u30d7\u3001\u30bf\u30c3\u30d7\u3001BIL\u3001\u6e29\u5ea6\u4e0a\u6607\u3001\u51b7\u5374\u30af\u30e9\u30b9<\/td>\n<\/tr>\n<tr>\n<td>6<\/td>\n<td>\u30bb\u30ab\u30f3\u30c0\u30ea\u30e1\u30a4\u30f3\u4fdd\u8b77<\/td>\n<td>3(B)\u306b\u57fa\u3065\u304f\u30bb\u30ab\u30f3\u30c0\u30ea\u5c0e\u4f53\u304a\u3088\u3073\u30c8\u30e9\u30f3\u30b9\u306b\u5408\u308f\u305b\u305f\u30b5\u30a4\u30ba\u306e\u30d6\u30ec\u30fc\u30ab\u30fc\u307e\u305f\u306f\u30d2\u30e5\u30fc\u30ba<\/td>\n<\/tr>\n<tr>\n<td>7<\/td>\n<td>\u30bb\u30ab\u30f3\u30c0\u30ea\u5c0e\u4f53<\/td>\n<td>\u30bb\u30ab\u30f3\u30c0\u30eaFLA\u306e125%\u3001\u30a2\u30f3\u30da\u30a2\u5bb9\u91cf\u8868\u306e\u9078\u629e\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u4e26\u5217\u30bb\u30c3\u30c8<\/td>\n<\/tr>\n<tr>\n<td>8<\/td>\n<td>\u914d\u96fb\u8a2d\u5099<\/td>\n<td>\u30d0\u30b9\u5b9a\u683c\u3001\u30e1\u30a4\u30f3\u30c7\u30d0\u30a4\u30b9\u3001\u304a\u3088\u3073\u5229\u7528\u53ef\u80fd\u306a\u6545\u969c\u96fb\u6d41\u3092\u6301\u3064\u30b9\u30a4\u30c3\u30c1\u30dc\u30fc\u30c9\u307e\u305f\u306f\u30d1\u30cd\u30eb\u30dc\u30fc\u30c9<\/td>\n<\/tr>\n<tr>\n<td>9<\/td>\n<td>\u63a5\u5730\u304a\u3088\u3073\u30dc\u30f3\u30c7\u30a3\u30f3\u30b0<\/td>\n<td>NEC 250.30\u306b\u57fa\u3065\u304f\u30b7\u30b9\u30c6\u30e0\u30dc\u30f3\u30c7\u30a3\u30f3\u30b0\u30b8\u30e3\u30f3\u30d1\u30fc\u3001\u63a5\u5730\u96fb\u6975\u5c0e\u4f53\u3001\u304a\u3088\u3073\u6a5f\u5668\u63a5\u5730\u5c0e\u4f53<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u56f3\u306e\u30ec\u30a4\u30a2\u30a6\u30c8\u306f\u30012\u3064\u306e\u69cb\u6210\u9078\u629e\u306b\u57fa\u3065\u3044\u3066\u5909\u66f4\u3055\u308c\u307e\u3059\u3002\u6700\u521d\u306e\u9078\u629e\u304c\u30c7\u30eb\u30bf\u3067\u30012\u756a\u76ee\u306e\u9078\u629e\u304c\u30ef\u30a4\uff08480Y\/277 V\u5546\u696d\u30b5\u30fc\u30d3\u30b9\u306e\u57fa\u672c\u69cb\u6210\uff09\u306e\u5834\u5408\u3001\u30c8\u30e9\u30f3\u30b9\u306f\u300cDyn1\u300d\u3068\u30de\u30fc\u30af\u3055\u308c\u3001\u30bb\u30ab\u30f3\u30c0\u30ea\u306f\u72ec\u81ea\u306e\u30cb\u30e5\u30fc\u30c8\u30e9\u30eb\u3068\u63a5\u5730\u96fb\u6975\u5c0e\u4f53\u3092\u5fc5\u8981\u3068\u3059\u308b\u5225\u3005\u306b\u5c0e\u51fa\u3055\u308c\u305f\u30b7\u30b9\u30c6\u30e0\u3068\u898b\u306a\u3055\u308c\u307e\u3059\u3002\u5dfb\u7dda\u69cb\u6210\u306e\u6c7a\u5b9a \u2014 \u304a\u3088\u3073\u305d\u308c\u304c\u5faa\u74b0\u96fb\u6d41\u3001\u30cf\u30fc\u30e2\u30cb\u30af\u30b9\u3001\u63a5\u5730\u306b\u4e0e\u3048\u308b\u5f71\u97ff \u2014 \u306f\u3001\u79c1\u305f\u3061\u306e <a href=\"\/ja\/blog\/delta-delta-vs-delta-wye-transformer\/\">\u30c7\u30eb\u30bf-\u30c7\u30eb\u30bf\u5bfe\u30c7\u30eb\u30bf-\u30ef\u30a4\u5909\u5727\u5668\u30ac\u30a4\u30c9<\/a>, \u306b\u8a18\u8f09\u3055\u308c\u3066\u304a\u308a\u3001\u56f3\u9762\u304c\u6700\u7d42\u5316\u3055\u308c\u308b\u524d\u306b\u8aad\u3080\u4fa1\u5024\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n<h2>\u30b9\u30c6\u30c3\u30d7\u30d0\u30a4\u30b9\u30c6\u30c3\u30d7\uff1a500 kVA\u30c8\u30e9\u30f3\u30b9\u306e\u5358\u7dda\u56f3\u3092\u63cf\u304f<\/h2>\n<ul>\n<li>\u540d\u677f\u304a\u3088\u3073\u30b7\u30b9\u30c6\u30e0\u60c5\u5831\u3092\u53ce\u96c6\u3057\u307e\u3059\u3002\u30c8\u30e9\u30f3\u30b9\u306ekVA\uff08500\uff09\u3068\u3001\u30d7\u30e9\u30a4\u30de\u30ea\u304a\u3088\u3073\u30bb\u30ab\u30f3\u30c0\u30ea\u96fb\u5727\u8a2d\u5b9a\u3001%Z\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u3001\u30d9\u30af\u30c8\u30eb\u30b0\u30eb\u30fc\u30d7\u3001\u30bf\u30c3\u30d7\u7bc4\u56f2\u3001BIL\u3001\u6e29\u5ea6\u4e0a\u6607\u3001\u51b7\u5374\u30af\u30e9\u30b9\u304c\u5fc5\u8981\u3067\u3059\u3002\u3055\u3089\u306b\u3001\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u6545\u969c\u96fb\u6d41\u3001\u30b5\u30fc\u30d3\u30b9\u96fb\u5727\u3001\u304a\u3088\u3073\u8ca0\u8377\u8a08\u7b97\u304c\u5fc5\u8981\u3067\u3059\u3002\u540d\u677f\u30c7\u30fc\u30bf\u304c\u306a\u3051\u308c\u3070\u3001\u56f3\u9762\u306f\u7121\u610f\u5473\u3067\u3059\u3002.<\/li>\n<li>\u96fb\u5727\u69cb\u6210\u3092\u78ba\u7acb\u3057\u307e\u3059\u3002\u5b9f\u969b\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u8ca0\u8377\u304b\u3089\u30d7\u30e9\u30a4\u30de\u30ea\uff08\u4f8b\u3048\u3070\u300113.8 kV\u30c7\u30eb\u30bf\u307e\u305f\u306f12.47 kV\u30ef\u30a4\uff09\u304a\u3088\u3073\u30bb\u30ab\u30f3\u30c0\u30ea\uff08\u4f8b\u3048\u3070\u3001480Y\/277 V\uff09\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002\u69cb\u6210\u3092\u78ba\u8a8d\u3059\u308b\u524d\u306b\u3001\u30e2\u30fc\u30bf\u30fc\u304a\u3088\u3073\u7167\u660e\u96fb\u5727\u3001208 V\u307e\u305f\u306f240 V\u6a5f\u5668\u306e\u8981\u4ef6\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002.<\/li>\n<li>\u4e21\u5074\u306e\u30d5\u30eb\u30ed\u30fc\u30c9\u96fb\u6d41\u3092\u8a08\u7b97\u3057\u307e\u3059\u3002\u4e0a\u8a18\u306e\u5f0f\u3092\u4f7f\u7528\u3057\u307e\u3059\uff1a480 V\u3067601 A\u3001240 V\u4e09\u76f8\u30671,203 A\u306a\u3069\u3002\u56f3\u9762\u4e0a\u306e\u30c8\u30e9\u30f3\u30b9\u306e\u6a2a\u306b\u4e21\u65b9\u306e\u6570\u5b57\u3092\u66f8\u304d\u7559\u3081\u307e\u3059\u3002.<\/li>\n<li>\u30d7\u30e9\u30a4\u30de\u30ea\u4fdd\u8b77\u30b5\u30a4\u30ba\u3092\u6c7a\u5b9a\u3057\u307e\u3059\u3002\u30d7\u30e9\u30a4\u30de\u30ea\u96fb\u6d41\u304c9 A\u3092\u8d85\u3048\u308b\u30c8\u30e9\u30f3\u30b9\u306e\u5834\u5408\u3001NEC\u8868450.3(B)\u306f\u3001601 A\u306e\u5834\u5408750 A\u30c7\u30d0\u30a4\u30b9\u3092\u53ef\u80fd\u306a\u9650\u308a\u4f7f\u7528\u3059\u308b\u3053\u3068\u3092\u610f\u5473\u3059\u308b\u30d7\u30e9\u30a4\u30de\u30ea\u30d5\u30eb\u30ed\u30fc\u30c9\u96fb\u6d41\u306e\u6700\u5927125%\u3067\u306e\u30d7\u30e9\u30a4\u30de\u30ea\u5c02\u7528\u4fdd\u8b77\u3092\u8a31\u53ef\u3057\u307e\u3059\u3002\u3053\u306e\u30c7\u30d0\u30a4\u30b9\u306f\u3001\u30c8\u30e9\u30f3\u30b9\u306e\u78c1\u6c17\u7a81\u5165\u96fb\u6d41\u3067\u30c8\u30ea\u30c3\u30d7\u3057\u306a\u3044\u3088\u3046\u306b\u8abf\u6574\u3055\u308c\u3066\u3044\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u7a81\u5165\u96fb\u6d41\u306f\u5b9a\u683c\u306e8\u500d\u304b\u308912\u500d\u306b\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u30bb\u30ab\u30f3\u30c0\u30ea\u4fdd\u8b77\u306e\u5834\u5408\u3001\u30d7\u30e9\u30a4\u30de\u30ea\u30c7\u30d0\u30a4\u30b9\u306f\u3001\u8868\u306e\u898f\u5247\u306b\u5fdc\u3058\u3066\u3001\u30bb\u30ab\u30f3\u30c0\u30ea\u30c7\u30d0\u30a4\u30b9\u304c125%\u307e\u305f\u306f\u305d\u308c\u4ee5\u4e0b\u306e\u5b9a\u683c\u3067\u3042\u308b\u9650\u308a\u3001\u6700\u5927250%\u307e\u3067\u5b9a\u683c\u3055\u308c\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002.<\/li>\n<li>\u5c0e\u4f53\u306e\u30b5\u30a4\u30ba\u8a2d\u5b9a\u3002\u3059\u3079\u3066\u306e\u4e00\u6b21\u304a\u3088\u3073\u4e8c\u6b21\u5c0e\u4f53\u3092\u3001\u305d\u308c\u305e\u308c\u306e\u5b9a\u683c\u8ca0\u8377\u96fb\u6d41\u306e\u5c11\u306a\u304f\u3068\u3082125%\uff08\u4e00\u6b21751 A\u3001\u4e8c\u6b21480 V\u306e\u5834\u5408751 A\u3001\u307e\u305f\u306f240 V\u4e8c\u6b21\u306e\u5834\u54081504 A\uff09\u306b\u5408\u308f\u305b\u3066\u30b5\u30a4\u30ba\u8a2d\u5b9a\u3057\u3001\u7279\u5b9a\u306e\u7d76\u7e01\u30bf\u30a4\u30d7\u304a\u3088\u3073\u7aef\u5b50\u6e29\u5ea6\u5b9a\u683c\u3092\u8003\u616e\u3057\u3066NEC\u306e\u96fb\u6d41\u5bb9\u91cf\u8868\u3092\u4f7f\u7528\u3057\u3066\u30b5\u30a4\u30ba\u3092\u9078\u629e\u3057\u3001\u5468\u56f2\u6e29\u5ea6\u304a\u3088\u3073\u914d\u7ba1\u5145\u586b\u306b\u57fa\u3065\u304f\u88dc\u6b63\u4fc2\u6570\u3092\u8003\u616e\u3057\u307e\u3059\u3002\u5076\u7136\u306b\u3082\u30011504 A\u306e\u4e8c\u6b21\u306f\u3001\u76f8\u3054\u3068\u306b4\u672c\u306e\u4e26\u5217500 kcmil\u9285\u5c0e\u4f53\u3092\u5fc5\u8981\u3068\u3059\u308b\u304b\u3001\u307e\u305f\u306f\u3053\u306e\u3088\u3046\u306a\u9ad8\u96fb\u6d41\u3067\u306e\u4e26\u5217\u5c0e\u4f53\u4f7f\u7528\u306e\u4e00\u822c\u7684\u306a\u6163\u884c\u306b\u3088\u308a\u540c\u7b49\u306e\u30a2\u30eb\u30df\u30cb\u30a6\u30e0\u69cb\u9020\u3092\u63d0\u4f9b\u3059\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u3053\u3067\u4f7f\u7528\u3055\u308c\u308b\u5c0e\u4f53\u30b5\u30a4\u30ba\u8a2d\u5b9a\u30d7\u30ed\u30bb\u30b9\u306f\u3001\u4efb\u610f\u306e\u5909\u5727\u5668\u56de\u8def\u306e\u30b5\u30a4\u30ba\u8a2d\u5b9a\u3068\u540c\u3058\u3067\u3042\u308a\u3001\u3057\u305f\u304c\u3063\u3066\u3001\u5c0e\u4f53\u6750\u6599\u306e\u69cb\u6210\u304a\u3088\u3073\u305d\u306e\u69cb\u6210\u306b\u95a2\u3059\u308b\u60c5\u5831\u306e\u53ce\u96c6\u306f\u3001\u5f53\u793e\u306e\u5909\u5727\u5668\u30b3\u30b9\u30c8\u30ac\u30a4\u30c9\u306b\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002.<\/li>\n<li>\u4fdd\u8b77\u306e\u8abf\u6574\u3002\u4e3b\u8981\u306a\u4e8c\u6b21\u88c5\u7f6e\u3001\u30d5\u30a3\u30fc\u30c0\u30fc\u88c5\u7f6e\u306b\u30de\u30fc\u30af\u3092\u4ed8\u3051\u3001\u30b7\u30b9\u30c6\u30e0\u306b\u3088\u3063\u3066\u8981\u6c42\u3055\u308c\u308b\u3059\u3079\u3066\u306e\u6a5f\u80fd\u3092\u542b\u3080\u3059\u3079\u3066\u306e\u6a5f\u80fd\u3092\u8a18\u8f09\u3057\u307e\u3059\u3002\u767a\u96fb\u6a5f\u304c\u4f7f\u7528\u3055\u308c\u308b\u30b7\u30b9\u30c6\u30e0\u3084\u3001\u516c\u5171\u4e8b\u696d\u306b\u63a5\u7d9a\u3055\u308c\u3066\u3044\u308b\u30b7\u30b9\u30c6\u30e0\u3067\u306f\u3001\u904b\u7528\u306e\u4e00\u90e8\u3068\u3057\u3066\u306e\u8ee2\u9001\u88c5\u7f6e\u304a\u3088\u3073\u3059\u3079\u3066\u306e\u904e\u96fb\u6d41\u88c5\u7f6e\u3092\u793a\u3057\u3001\u305d\u308c\u3089\u306e\u5b9a\u683c\u3092\u540c\u3058\u884c\u306b\u8a18\u8f09\u3057\u307e\u3059\u3002.<\/li>\n<li>\u63a5\u5730\u304a\u3088\u3073\u30dc\u30f3\u30c7\u30a3\u30f3\u30b0\u3002\u5225\u3005\u306b\u751f\u6210\u3055\u308c\u305f\u30b7\u30b9\u30c6\u30e0\u306e\u5834\u5408\u3001NEC 250.66\u306b\u57fa\u3065\u3044\u3066\u30b7\u30b9\u30c6\u30e0\u30dc\u30f3\u30c7\u30a3\u30f3\u30b0\u30b8\u30e3\u30f3\u30d1\u30fc\u3001\u5c0e\u4f53\u63a5\u5730\u96fb\u6975\u3092\u793a\u3057\u307e\u3059\u3002\u63a5\u5730\u96fb\u6975\u3084\u63a5\u5730\u5c0e\u4f53\u306a\u3069\u306e\u3059\u3079\u3066\u306e\u69cb\u9020\u8981\u7d20\u3092\u793a\u3057\u307e\u3059\u3002\u5909\u5727\u5668\u306e\u8a2d\u7f6e\u4e2d\u306b\u884c\u308f\u308c\u305f\u63a5\u5730\u30df\u30b9\u306f\u3001\u6700\u3082\u4e00\u822c\u7684\u306a\u4e0d\u627f\u8a8d\u306e\u7406\u7531\u3067\u3042\u308b\u305f\u3081\u3001\u63a5\u5730\u306e\u554f\u984c\u306f\u5f53\u793e\u306e\u5909\u5727\u5668\u63a5\u5730\u30ac\u30a4\u30c9\u3067\u8b70\u8ad6\u3055\u308c\u3066\u3044\u307e\u3059\u3002.<\/li>\n<li>\u30c9\u30e9\u30d5\u30c6\u30a3\u30f3\u30b0\u304a\u3088\u3073\u30af\u30ed\u30b9\u30ea\u30d5\u30a1\u30ec\u30f3\u30b9\u3002\u3059\u3079\u3066\u306e\u6a5f\u5668\u306e\u5b9a\u683c\u3001\u3059\u3079\u3066\u306e\u5c0e\u4f53\u306e\u30b5\u30a4\u30ba\u3068\u6570\u91cf\u3001\u304a\u3088\u3073\u3059\u3079\u3066\u306e\u914d\u7ba1\u3092\u793a\u3057\u307e\u3059\u3002\u8a2d\u8a08\u3092\u30ec\u30d3\u30e5\u30fc\u306b\u9001\u4fe1\u3059\u308b\u524d\u306b\u3001NEC\u306e\u8a18\u4e8b\u53c2\u7167\u3068\u5909\u5727\u5668\u306e\u9298\u677f\u30c7\u30fc\u30bf\u3092\u793a\u3057\u307e\u3059\u3002.<\/li>\n<\/ul>\n<h2>\u56f3\u9762\u306b\u542b\u307e\u308c\u308b\u6ce8\u91c8<\/h2>\n<p>\u5358\u7dda\u56f3\u306f\u3001\u63d0\u4f9b\u3055\u308c\u305f\u30ce\u30fc\u30c8\u3068\u540c\u3058\u304f\u3089\u3044\u52b9\u679c\u7684\u3067\u3059\u3002500 kVA\u306e\u8a2d\u7f6e\u306e\u5834\u5408\u3001\u57fa\u672c\u7684\u306a\u6ce8\u91c8\u30bb\u30c3\u30c8\u306f\u6b21\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\uff1a<\/p>\n<ul>\n<li>\u5909\u5727\u5668\uff1a500 kVA\u306e\u5b9a\u683c\u3001\u76f8\u3001\u96fb\u5727\u3001%Z\u3001\u30d9\u30af\u30c8\u30eb\u30bf\u30a4\u30d7\uff08\u4f8b\uff1aDyn1\uff09\u3001\u304a\u3088\u3073\u3069\u308c\u3060\u3051\u30bf\u30c3\u30d7\u3067\u304d\u308b\u304b\uff08\u00b12 \u00d7 2.5%\uff09\u3068BIL\u304a\u3088\u3073\u6e29\u5ea6\u4e0a\u6607\uff08\u4f8b\u3048\u3070\u300165 \u00b0C\uff09\u3002.<\/li>\n<li>\u4fdd\u8b77\u88c5\u7f6e\uff1a\u30bf\u30a4\u30d7\u3001\u30a2\u30f3\u30da\u30a2\u5b9a\u683c\u3001\u906e\u65ad\u5b9a\u683c\uff08AIC\uff09\u3001\u304a\u3088\u3073\u30a8\u30f3\u30af\u30ed\u30fc\u30b8\u30e3\u306e\u30bf\u30a4\u30d7\u3002.<\/li>\n<li>\u5c0e\u4f53\uff1a\u30b5\u30a4\u30ba\u3001\u5404\u76f8\u306e\u6570\u91cf\u3001\u7d76\u7e01\u306e\u7a2e\u985e\u3001\u304a\u3088\u3073\u305d\u308c\u3089\u306e\u53d6\u308a\u4ed8\u3051\u65b9\u6cd5\u3002.<\/li>\n<li>\u63a5\u5730\uff1a\u30b7\u30b9\u30c6\u30e0\u306e\u30dc\u30f3\u30c7\u30a3\u30f3\u30b0\u30b8\u30e3\u30f3\u30d1\u30fc\u306e\u30b5\u30a4\u30ba\u3001\u63a5\u5730\u5c0e\u4f53\u306e\u30b5\u30a4\u30ba\u3001\u304a\u3088\u3073\u96fb\u6975\u306e\u7a2e\u985e\u3002.<\/li>\n<li>\u30b7\u30b9\u30c6\u30e0\u30c7\u30fc\u30bf\uff1a\u5229\u7528\u53ef\u80fd\u306a\u6545\u969c\u96fb\u6d41\u3001\u304a\u3088\u3073\u3059\u3079\u3066\u306e\u88c5\u7f6e\u306eAIC\u3002.<\/li>\n<li>\u8ca0\u8377\u304a\u3088\u3073\u53c2\u7167\uff1a\u95a2\u4e0e\u3059\u308b\u8ca0\u8377\u30bf\u30a4\u30d7\u3001\u304a\u3088\u3073NEC\u30b3\u30fc\u30c9\u306b\u57fa\u3065\u3044\u3066\u63d0\u4f9b\u3055\u308c\u308b\u53c2\u7167\u3002.<\/li>\n<\/ul>\n<h2>500 kVA\u5358\u7dda\u56f3\u306e\u4e00\u822c\u7684\u306a\u30df\u30b9<\/h2>\n<ul>\n<li>\u5909\u5727\u5668\u304c\u4e2d\u6027\u3092\u516c\u5171\u4e8b\u696d\u30b5\u30fc\u30d3\u30b9\u304b\u3089\u5206\u96e2\u3059\u308b\u5834\u5408\u306b\u30b7\u30b9\u30c6\u30e0\u30dc\u30f3\u30c7\u30a3\u30f3\u30b0\u30b8\u30e3\u30f3\u30d1\u30fc\u3092\u7121\u8996\u3059\u308b\u3053\u3068\u306f\u3001\u63a5\u5730\u306b\u304a\u3051\u308b\u6700\u3082\u4e00\u822c\u7684\u306a\u30a8\u30e9\u30fc\u3067\u3059\u3002.<\/li>\n<li>\u9023\u7d9a\u8ca0\u8377\u306e125%\u3067\u306f\u306a\u304f\u3001\u904b\u8ee2\u8ca0\u8377\u306b\u57fa\u3065\u3044\u3066\u4e8c\u6b21\u5074\u3092\u6c7a\u5b9a\u3059\u308b\u3053\u3068\u306f\u3001\u30d5\u30eb\u8ca0\u8377\u3092\u51e6\u7406\u3067\u304d\u306a\u3044\u305f\u3081\u3001\u5341\u5206\u306a\u914d\u7dda\u304c\u884c\u308f\u308c\u306a\u3044\u7d50\u679c\u3068\u306a\u308a\u307e\u3059\u3002.<\/li>\n<li>\u4e3b\u88c5\u7f6e\u3092\u9078\u5b9a\u3059\u308b\u969b\u306b\u7a81\u5165\u96fb\u6d41\u3092\u7121\u8996\u3059\u308b\u3053\u3068\u306f\u3001\u30a8\u30cd\u30eb\u30ae\u30fc\u4f9b\u7d66\u304c\u884c\u308f\u308c\u308b\u305f\u3073\u306b\u30c8\u30ea\u30c3\u30d7\u3059\u308b\u5909\u5727\u5668\u3092\u5f15\u304d\u8d77\u3053\u3057\u307e\u3059\u3002.<\/li>\n<li>\u74b0\u5883\u306b\u3088\u308b\u5b9a\u683c\u4f4e\u4e0b\u3092\u8003\u616e\u3057\u306a\u3044\u3053\u3068\u306f\u3001\u975e\u5e38\u306b\u6691\u3044\u6a5f\u68b0\u5ba4\u3084\u7802\u6f20\u306e\u8a2d\u7f6e\u306b\u304a\u3044\u3066\u300130 \u00b0C\u3092\u8d85\u3048\u308b\u3068\u30a2\u30f3\u30da\u30a2\u80fd\u529b\u304c\u5927\u5e45\u306b\u4f4e\u4e0b\u3059\u308b\u5b9f\u969b\u306e\u554f\u984c\u3067\u3059\u3002.<\/li>\n<li>\u56f3\u9762\u3068\u6a5f\u5668\u306e\u540d\u677f\u306b\u304a\u3051\u308b\u30bf\u30c3\u30d7\u8a2d\u5b9a\u3084\u30d9\u30af\u30c8\u30eb\u30b0\u30eb\u30fc\u30d7\u3092\u6df7\u540c\u3059\u308b\u3053\u3068\u306f\u3001\u4e26\u5217\u5909\u5727\u5668\u306e\u8aa4\u52d5\u4f5c\u3092\u5f15\u304d\u8d77\u3053\u3057\u307e\u3059\u3002.<\/li>\n<li>480Y\/277 V\u56de\u8def\u304c\u4e2d\u6027\u7dda\u7167\u660e\u30b7\u30b9\u30c6\u30e0\u306b\u96fb\u529b\u3092\u4f9b\u7d66\u3059\u308b\u969b\u306b\u3001\u56de\u8def\u304b\u3089\u4e2d\u6027\u7dda\u3092\u5916\u3059\u3053\u3068\u3002.<\/li>\n<li>480 V\u306e\u5909\u5727\u5668\u304b\u3089208 V\u306e\u8ca0\u8377\u3092\u4e2d\u9593\u6bb5\u968e\u306a\u3057\u3067\u63a5\u7d9a\u3059\u308b\u3053\u3068\u306f\u3001\u8a66\u904b\u8ee2\u6bb5\u968e\u3067\u660e\u3089\u304b\u306b\u306a\u308b\u8aa4\u308a\u3067\u3059\u3002.<\/li>\n<\/ul>\n<h2>\u8ab0\u304c\u56f3\u9762\u3092\u63cf\u304d\u3001\u30b9\u30bf\u30f3\u30d7\u3092\u62bc\u3057\u3001\u627f\u8a8d\u3059\u308b\u3079\u304d\u304b<\/h2>\n<p>\u7c73\u56fd\u306e\u307b\u307c\u3059\u3079\u3066\u306e\u5dde\u3067\u306f\u3001\u7523\u696d\u304a\u3088\u3073\u5546\u696d\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u96fb\u6c17\u8a2d\u8a08\u306f\u3001\u767b\u9332\u3055\u308c\u305f\u5c02\u9580\u6280\u8853\u8005\u306b\u3088\u3063\u3066\u4f5c\u6210\u307e\u305f\u306f\u5c01\u5370\u3055\u308c\u308b\u5fc5\u8981\u304c\u3042\u308a\u3001\u63a5\u7d9a\u56f3\u9762\u306f\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u306e\u8981\u4ef6\u3092\u6e80\u305f\u3057\u3001\u30b5\u30fc\u30d3\u30b9\u5f53\u5c40\u306eNEC\u306e\u63a1\u7528\u306b\u3088\u3063\u3066\u627f\u8a8d\u3055\u308c\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u4f5c\u696d\u306e\u9032\u884c\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\uff1a\u6280\u8853\u8005\u306f\u6a5f\u5668\u306e\u96fb\u529b\u5b9a\u683c\u3068\u540d\u677f\u306e\u8aad\u307f\u53d6\u308a\u306b\u57fa\u3065\u3044\u3066\u5358\u7dda\u56f3\u3092\u4f5c\u6210\u3057\u3001\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u306f\u63d0\u6848\u3055\u308c\u305f\u4fdd\u8b77\u30b7\u30b9\u30c6\u30e0\u3092\u8a55\u4fa1\u3057\u3001AHJ\u306f\u8a31\u53ef\u3092\u4e0e\u3048\u306a\u304c\u3089\u305d\u308c\u3092\u30ec\u30d3\u30e5\u30fc\u3057\u3001\u8acb\u8ca0\u696d\u8005\u306f\u627f\u8a8d\u3055\u308c\u305f\u56f3\u9762\u306b\u5f93\u3044\u3001\u4f5c\u696d\u306e\u7d42\u4e86\u6642\u306b\u5b9f\u65bd\u5909\u66f4\u3092\u6280\u8853\u8005\u306b\u8fd4\u5374\u3057\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u30b9\u30c6\u30c3\u30d7\u3092\u7d4c\u306a\u3044\u3059\u3079\u3066\u306e\u7d4c\u9a13\u306f\u3001\u30a8\u30cd\u30eb\u30ae\u30fc\u4f9b\u7d66\u3067\u304d\u306a\u3044\u6a5f\u5668\u3092\u3082\u305f\u3089\u3057\u307e\u3059\u3002.<\/p>\n<h2>\u3088\u304f\u3042\u308b\u8cea\u554f<\/h2>\n<h3>500 kVA\u306e\u5909\u5727\u5668\u306f\u4f55\u30a2\u30f3\u30da\u30a2\u3092\u51e6\u7406\u3067\u304d\u307e\u3059\u304b\uff1f<\/h3>\n<p>\u5b8c\u5168\u306a\u8ca0\u8377\u96fb\u6d41\u306f\u96fb\u5727\u306b\u4f9d\u5b58\u3057\u307e\u3059\u3002500 kVA\u306b\u5b9a\u683c\u3055\u308c\u305f\u5909\u5727\u5668\u306f\u3001480 V\u4e09\u76f8\u3067\u52d5\u4f5c\u3059\u308b\u5834\u5408601 A\u3001240 V\u4e09\u76f8\u3067\u52d5\u4f5c\u3059\u308b\u5834\u54081,203 A\u3001600 V\u4e09\u76f8\u3067\u52d5\u4f5c\u3059\u308b\u5834\u5408481 A\u3001208Y\/120 V\u30671,388 A\u3001\u5358\u76f8240 V\u3067\u52d5\u4f5c\u3059\u308b\u5834\u54082,083 A\u3092\u6301\u3064\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u5834\u5408\u306b\u9069\u7528\u3067\u304d\u308b\u65b9\u7a0b\u5f0f\u306f\u3001\u4e09\u76f8\u56de\u8def\u306e\u5834\u5408\u306fI = kVA * 1,000 \/ (\u221a3 * V)\u3001\u5358\u76f8\u30b7\u30b9\u30c6\u30e0\u306e\u5834\u5408\u306fI = kVA * 1,000 \/ V\u3067\u3059\u3002.<\/p>\n<h3>500 kVA\u306e\u5909\u5727\u5668\u306e\u30b3\u30b9\u30c8\u306f\u3044\u304f\u3089\u3067\u3059\u304b\uff1f<\/h3>\n<p>2026\u5e74\u306b\u306f\u3001\u7c73\u56fd\u5e02\u5834\u3067\u306e500 kVA\u4e09\u76f8\u5909\u5727\u5668\u306e\u30b3\u30b9\u30c8\u306f\u7d04$10,000-25,000\u306b\u306a\u308b\u3068\u4e88\u60f3\u3055\u308c\u307e\u3059\u3002\u4e7e\u5f0f\u5c4b\u5185\u30e6\u30cb\u30c3\u30c8\u306e\u30b3\u30b9\u30c8\u306f\u5c11\u3057\u9ad8\u304f\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u3001\u30d7\u30ec\u30df\u30a2\u30e0\u9285\u5dfb\u304d\u30e6\u30cb\u30c3\u30c8\u3084\u30ab\u30b9\u30bf\u30e0\u30aa\u30fc\u30c0\u30fc\u306f\u305d\u308c\u4ee5\u4e0a\u3067\u3059\u3002\u8a2d\u7f6e\u306b\u5fc5\u8981\u306a\u30b1\u30fc\u30d6\u30eb\u3001\u4fdd\u8b77\u88c5\u7f6e\u3001\u52b4\u50cd\u3001\u8a66\u904b\u8ee2\u3092\u8003\u616e\u3059\u308b\u3068\u3001\u7dcf\u4fa1\u683c\u306f$56,000\u304b\u3089$88,000\u306e\u7bc4\u56f2\u306b\u9054\u3057\u3001\u3088\u308a\u5927\u304d\u306a\u6539\u4fee\u306f$100,000\u3092\u8d85\u3048\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002Subian Electric\u306e\u4f01\u696d\u304b\u3089\u306e\u8a8d\u5b9a\u8f38\u5165\u88fd\u54c1\u306f\u3001\u4ed5\u69d8\u304c\u540c\u3058\u3067\u3042\u308c\u3070\u4ed6\u306e\u88fd\u54c1\u3088\u308a\u308230-45%\u5b89\u304f\u306a\u308b\u50be\u5411\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n<h3>500 kVA\u306e\u5909\u5727\u5668\u306e\u6700\u5927\u8ca0\u8377\u5bb9\u91cf\u306f\u4f55\u3067\u3059\u304b\uff1f<\/h3>\n<p>\u3053\u306e\u8cea\u554f\u3078\u306e\u7b54\u3048\u306f500 kVA\u3067\u3042\u308a\u3001\u3053\u308c\u306f\u898b\u304b\u3051\u306e\u96fb\u529b\u306b\u95a2\u3059\u308b\u5b9a\u683c\u3067\u3042\u308a\u3001\u901a\u5e38\u3001\u529b\u7387\u304c0.8\u306e\u5834\u5408\u3001\u5b9f\u969b\u306e\u96fb\u529b\u306b\u95a2\u3057\u3066\u7d04400 kW\u306b\u76f8\u5f53\u3057\u307e\u3059\u3002\u696d\u754c\u3067\u9069\u7528\u3055\u308c\u308b\u57fa\u6e96\u306e\u4e00\u3064\u306f\u3001\u5909\u5727\u5668\u3092\u5b9a\u683c\u306e60-80%\u3067\u8ca0\u8377\u3092\u304b\u3051\u308b\u3053\u3068\u3067\u3059\u3002\u3053\u308c\u306f\u3001\u5897\u52a0\u3059\u308b\u8ca0\u8377\u306b\u8010\u3048\u308b\u80fd\u529b\u304c\u3042\u308b\u305f\u3081\u3067\u3059\u3002\u3055\u3089\u306b\u3001ANSI\/IEEE\u306e\u8ca0\u8377\u8868\u306f\u3001\u5909\u5727\u5668\u304c\u6700\u5927\u8ca0\u8377\u3092\u8003\u616e\u3057\u3066\u8ca0\u8377\u3092\u304b\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u6761\u4ef6\u3092\u63d0\u4f9b\u3057\u307e\u3059\u304c\u3001\u305d\u308c\u306b\u4f9d\u5b58\u3059\u308b\u524d\u306b\u30e1\u30fc\u30ab\u30fc\u306e\u8ca0\u8377\u66f2\u7dda\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\u3002.<\/p>\n<h3>500 kVA \u30c8\u30e9\u30f3\u30b9\u306e\u30b1\u30fc\u30d6\u30eb\u30b5\u30a4\u30ba\u3092\u8a08\u7b97\u3059\u308b\u65b9\u6cd5\u306f\uff1f<\/h3>\n<p>\u307e\u305a\u3001\u30c8\u30e9\u30f3\u30b9\u306e\u5b9a\u683c\u8ca0\u8377\u96fb\u6d41\u3092\u8a08\u7b97\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\uff08\u4f8b\u3048\u3070\u3001480 V\u3067\u306f601 A\u306b\u76f8\u5f53\u3057\u307e\u3059\uff09\u3002\u305d\u306e\u5f8c\u3001\u9023\u7d9a\u904b\u8ee2\u306e\u305f\u3081\u306b125%\u306e\u6570\u5024\u306b\u5f93\u3063\u3066\u898b\u3064\u3051\u305f\u5024\u3092\u8abf\u6574\u3057\u307e\u3059\u3002\u305d\u306e\u5f8c\u3001NEC\u304c\u63d0\u4f9b\u3059\u308b\u30a2\u30f3\u30da\u30a2\u5bb9\u91cf\u8868\u306b\u5f93\u3063\u3066\u30ef\u30a4\u30e4\u30fc\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u304c\u3001\u4f7f\u7528\u3055\u308c\u308b\u7d76\u7e01\u306e\u7a2e\u985e\u306b\u5fdc\u3058\u3066\u9069\u5207\u306a\u88dc\u6b63\u3092\u9069\u7528\u3059\u308b\u3053\u3068\u3092\u5fd8\u308c\u306a\u3044\u3067\u304f\u3060\u3055\u3044\u3002.<\/p>\n<h2>\u53c2\u8003\u6587\u732e<\/h2>\n<ul>\n<li><a href=\"https:\/\/www.nfpa.org\/\" rel=\"nofollow noopener\" target=\"_blank\">NFPA \u2014 \u56fd\u5bb6\u96fb\u6c17\u898f\u5247\uff08\u7b2c450\u6761\u3001\u7b2c250\u6761\uff09<\/a><\/li>\n<li><a href=\"https:\/\/standards.ieee.org\/\" rel=\"nofollow noopener\" target=\"_blank\">IEEE \u2014 C57.12\u30b7\u30ea\u30fc\u30ba\u3001\u30c8\u30e9\u30f3\u30b9\u306e\u6a19\u6e96\u8981\u4ef6<\/a><\/li>\n<li><a href=\"https:\/\/www.energy.gov\/\" rel=\"nofollow noopener\" target=\"_blank\">\u7c73\u56fd\u30a8\u30cd\u30eb\u30ae\u30fc\u7701 \u2014 \u914d\u96fb\u30c8\u30e9\u30f3\u30b9\u52b9\u7387\u57fa\u6e96<\/a><\/li>\n<li><a href=\"https:\/\/www.osha.gov\/\" rel=\"nofollow noopener\" target=\"_blank\">OSHA \u2014 \u4f5c\u696d\u6163\u884c\u306e\u305f\u3081\u306e\u96fb\u6c17\u5b89\u5168\u8981\u4ef6<\/a><\/li>\n<\/ul>\n<h2>\u7d50\u8ad6<\/h2>\n<p>500 kVA \u30c8\u30e9\u30f3\u30b9\u306e\u30e6\u30cb\u30d5\u30a3\u30e9\u30fc\u30b9\u30ad\u30fc\u30de\u30c6\u30a3\u30c3\u30af\u56f3\u306f\u3042\u307e\u308a\u76ee\u7acb\u305f\u306a\u3044\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u304c\u3001\u3053\u308c\u306f\u96fb\u6c17\u8acb\u8ca0\u696d\u8005\u3001\u691c\u67fb\u5b98\u3001\u305d\u3057\u3066\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u306b\u5bfe\u3057\u3066\u4e2d\u96fb\u5727\u96fb\u6c17\u8a2d\u5099\u306e\u904b\u7528\u3001\u81ea\u52d5\u5316\u3001\u63a5\u5730\u304a\u3088\u3073\u914d\u96fb\u306b\u95a2\u3059\u308b\u5168\u4f53\u306e\u72b6\u6cc1\u3092\u4f1d\u3048\u308b\u6587\u66f8\u3067\u3059\u3002\u64cd\u4f5c\u306f\u6b63\u3057\u3044\u9806\u5e8f\u3067\u884c\u3046\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u307e\u305a\u3001\u30b5\u30fc\u30d3\u30b9\u3068\u30e1\u30fc\u30bf\u30fc\u306e\u70b9\u691c\u3092\u884c\u3044\u3001\u6b21\u306b\u30b5\u30fc\u30d3\u30b9\u306e\u505c\u6b62\u3092\u884c\u3044\u307e\u3059\u3002\u6b21\u306e\u30b9\u30c6\u30c3\u30d7\u306b\u306f\u3001NEC 450.3(B)\u306b\u57fa\u3065\u304f\u4e00\u6b21\u30d5\u30a3\u30fc\u30c0\u30fc\u3068\u4e00\u6b21\u4fdd\u8b77\u304c\u542b\u307e\u308c\u307e\u3059\u3002\u305d\u306e\u5f8c\u3001500 kVA \u30c8\u30e9\u30f3\u30b9\u81ea\u4f53\u306b\u95a2\u3059\u308b\u60c5\u5831\u3068\u305d\u306e\u540d\u677f\u30c7\u30fc\u30bf\u3092\u63d0\u4f9b\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u5f8c\u3001\u8a08\u7b97\u3055\u308c\u305f\u9700\u8981\u8ca0\u8377\u306b\u95a2\u3059\u308b125%\u306b\u95a2\u3057\u3066\u4e8c\u6b21\u304c\u63d0\u4f9b\u3055\u308c\u3001\u30ef\u30a4\u30e4\u30fc\u3082\u63d0\u4f9b\u3055\u308c\u307e\u3059\u3002\u56f3\u306b\u306f\u3001\u5b9a\u683c\u3001\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u3001\u30d9\u30af\u30c8\u30eb\u30b0\u30eb\u30fc\u30d7\u3001\u30bf\u30c3\u30d7\u3001\u5c0e\u4f53\u3001\u304a\u3088\u3073\u6545\u969c\u96fb\u6d41\u306b\u95a2\u3059\u308b\u3059\u3079\u3066\u306e\u4ed5\u69d8\u30c7\u30fc\u30bf\u3082\u8a18\u5165\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u56f3\u3092\u8a18\u5165\u3057\u3001\u4ed6\u306e\u30a8\u30f3\u30b8\u30cb\u30a2\u3084\u5c02\u9580\u5bb6\u3001\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u3001AHJ\u306a\u3069\u306b\u6e21\u3059\u3053\u3068\u304c\u5fc5\u8981\u306b\u306a\u308a\u307e\u3059\u3002.<\/p>","protected":false},"excerpt":{"rendered":"<p>The term &#8220;unifilar diagram,&#8221; which in the United States is referred to as a &#8220;single-line diagram,&#8221; denotes a diagram that illustrates how a 500-kVA transformer connects to the power system, including the source of the power supply in the utility company, methods of primary protection, ratings of the transformer itself, protection, and distribution of the secondary, and methods of grounding. The single-line diagram of such a transformer is critical, as this is one of the most important points for both utility and Authority Having Jurisdiction (AHJ) to accept the plan. The guide will provide you with an understanding of the typical layout, detailed steps of drawing the diagram, necessary calculations, [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":11515,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-11514","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/subian-electric.com\/ja\/wp-json\/wp\/v2\/posts\/11514","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/subian-electric.com\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/subian-electric.com\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/subian-electric.com\/ja\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/subian-electric.com\/ja\/wp-json\/wp\/v2\/comments?post=11514"}],"version-history":[{"count":3,"href":"https:\/\/subian-electric.com\/ja\/wp-json\/wp\/v2\/posts\/11514\/revisions"}],"predecessor-version":[{"id":11519,"href":"https:\/\/subian-electric.com\/ja\/wp-json\/wp\/v2\/posts\/11514\/revisions\/11519"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/subian-electric.com\/ja\/wp-json\/wp\/v2\/media\/11515"}],"wp:attachment":[{"href":"https:\/\/subian-electric.com\/ja\/wp-json\/wp\/v2\/media?parent=11514"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/subian-electric.com\/ja\/wp-json\/wp\/v2\/categories?post=11514"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/subian-electric.com\/ja\/wp-json\/wp\/v2\/tags?post=11514"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}