{"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\/ar\/blog\/unifilar-diagram-for-a-500-kva-transformer-in-the-united-states\/","title":{"rendered":"\u0645\u062e\u0637\u0637 \u0623\u062d\u0627\u062f\u064a \u0627\u0644\u062e\u0637 \u0644\u062a\u062d\u0648\u064a\u0644\u0629 \u0628\u0642\u062f\u0631\u0629 500 kVA \u0641\u064a \u0627\u0644\u0648\u0644\u0627\u064a\u0627\u062a \u0627\u0644\u0645\u062a\u062d\u062f\u0629"},"content":{"rendered":"<p>\u0645\u0635\u0637\u0644\u062d \u201c\u0645\u062e\u0637\u0637 \u0623\u062d\u0627\u062f\u064a \u0627\u0644\u0637\u0648\u0631\u201d\u060c \u0648\u0627\u0644\u0630\u064a \u064a\u064f\u0634\u0627\u0631 \u0625\u0644\u064a\u0647 \u0641\u064a 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\u0627\u0644\u062c\u0647\u062f (PTs) \u0645\u0648\u0636\u062d\u0629 \u0643\u062f\u0648\u0627\u0626\u0631 \u0639\u0644\u0649 \u0627\u0644\u062e\u0637<\/td>\n<\/tr>\n<tr>\n<td>\u0627\u0644\u062a\u0623\u0631\u064a\u0636<\/td>\n<td>\u0641\u0631\u0639 \u0645\u0648\u0635\u0644 \u0645\u0646\u0641\u0635\u0644 \u0645\u0639 \u0631\u0645\u0632 \u0627\u0644\u0642\u0637\u0628 \u0627\u0644\u0623\u0631\u0636\u064a<\/td>\n<\/tr>\n<tr>\n<td>\u0627\u0644\u0623\u062d\u0645\u0627\u0644<\/td>\n<td>\u0644\u0648\u062d\u0627\u062a \u0627\u0644\u062a\u062d\u0643\u0645 \u0648\u0644\u0648\u062d\u0627\u062a \u0627\u0644\u0645\u0641\u0627\u062a\u064a\u062d \u0643\u0645\u0633\u062a\u0637\u064a\u0644\u0627\u062a \u0645\u0639 \u062a\u064a\u0627\u0631 \u0627\u0644\u062d\u0627\u0641\u0644\u0629 \u0627\u0644\u0645\u062a\u0627\u062d \u0648\u0627\u0644\u062a\u064a\u0627\u0631 \u0627\u0644\u0642\u0635\u064a\u0631 \u0627\u0644\u0645\u062a\u0627\u062d<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u064a\u062e\u062a\u0644\u0641 \u0627\u0644\u0645\u062e\u0637\u0637 \u0627\u0644\u0623\u062d\u0627\u062f\u064a \u0627\u0644\u0637\u0648\u0631 \u0639\u0646 \u0645\u062e\u0637\u0637 \u0627\u0644\u0623\u0633\u0644\u0627\u0643\u060c \u062d\u064a\u062b \u0625\u0646\u0647 \u0644\u0627 \u064a\u0638\u0647\u0631 \u0623\u064a \u0645\u0639\u062f\u0627\u062a \u0646\u0647\u0627\u0626\u064a\u0629. \u0625\u0646\u0647 \u0623\u0634\u0628\u0647 \u0628\u0645\u062e\u0637\u0637 \u0639\u0644\u0649 \u0645\u0633\u062a\u0648\u0649 \u0627\u0644\u0646\u0638\u0627\u0645 \u064a\u0639\u0631\u0636 \u0627\u0644\u062e\u0635\u0627\u0626\u0635\u060c \u0648\u0627\u0644\u0623\u062c\u0647\u0632\u0629 \u0627\u0644\u0648\u0627\u0642\u064a\u0629\u060c \u0648\u0627\u0644\u0623\u0633\u0644\u0627\u0643\u060c \u0648\u0646\u0638\u0627\u0645 \u0627\u0644\u062a\u0623\u0631\u064a\u0636\u060c \u0648\u064a\u0642\u062f\u0645\u0647\u0627 \u0628\u0637\u0631\u064a\u0642\u0629 \u062a\u062a\u064a\u062d \u0627\u0644\u062a\u0646\u0633\u064a\u0642 \u0627\u0644\u0633\u0631\u064a\u0639 \u0648\u0627\u0644\u0633\u0647\u0644 \u0644\u0644\u0623\u0634\u064a\u0627\u0621.<\/p>\n<h2>\u0627\u0639\u0631\u0641 \u0623\u0631\u0642\u0627\u0645\u0643 \u0642\u0628\u0644 \u0623\u0646 \u062a\u0631\u0633\u0645 \u062e\u0637\u0627\u064b<\/h2>\n<p>\u0627\u0644\u062a\u064a\u0627\u0631 \u0641\u064a \u0627\u0644\u0631\u0633\u0645 \u064a\u0639\u062a\u0645\u062f \u0639\u0644\u0649 \u062a\u064a\u0627\u0631\u0627\u062a \u0627\u0644\u062d\u0645\u0644 \u0627\u0644\u0643\u0627\u0645\u0644 \u0644\u0644\u0645\u062d\u0648\u0644 \u0648\u062d\u0633\u0627\u0628 \u0647\u0630\u0647 \u0627\u0644\u0642\u064a\u0645\u0629 \u0644\u0645\u062d\u0648\u0644 \u0628\u0642\u062f\u0631\u0629 500 kVA. \u0644\u0644\u062a\u064a\u0627\u0631 \u0627\u0644\u062b\u0644\u0627\u062b\u064a \u0627\u0644\u0637\u0648\u0631: I = kVA \u00d7 1,000 \u00f7 (\u221a3 \u00d7 V) \u0648\u0644\u0644\u062a\u064a\u0627\u0631 \u0627\u0644\u0623\u062d\u0627\u062f\u064a \u0627\u0644\u0637\u0648\u0631: I = kVA \u00d7 1,000 \u00f7 V.<\/p>\n<table>\n<tbody>\n<tr>\n<th>\u0627\u0644\u0627\u062a\u0635\u0627\u0644<\/th>\n<th>\u062a\u064a\u0627\u0631 \u0627\u0644\u062d\u0645\u0644 \u0627\u0644\u0643\u0627\u0645\u0644<\/th>\n<th>\u062a\u0637\u0628\u064a\u0642 \u0646\u0645\u0648\u0630\u062c\u064a \u0641\u064a \u0627\u0644\u0648\u0644\u0627\u064a\u0627\u062a \u0627\u0644\u0645\u062a\u062d\u062f\u0629<\/th>\n<\/tr>\n<tr>\n<td>500 kVA\u060c 480 V \u062b\u0644\u0627\u062b\u064a \u0627\u0644\u0637\u0648\u0631 (\u0631\u0626\u064a\u0633\u064a)<\/td>\n<td>\u0666\u0660\u0661 \u0623<\/td>\n<td>\u062a\u063a\u0630\u064a\u0629 \u0627\u0644\u0645\u0631\u0627\u0641\u0642 \u0623\u0648 \u0627\u0644\u062e\u062f\u0645\u0629 \u0639\u0646\u062f 480 V\u061b \u0631\u0626\u064a\u0633\u064a \u062a\u062c\u0627\u0631\u064a \u0634\u0627\u0626\u0639<\/td>\n<\/tr>\n<tr>\n<td>500 kVA\u060c 480Y\/277 V \u062b\u0627\u0646\u0648\u064a<\/td>\n<td>\u0666\u0660\u0661 \u0623<\/td>\n<td>\u062a\u0648\u0632\u064a\u0639 \u062a\u062c\u0627\u0631\u064a \u0645\u0639 \u0625\u0636\u0627\u0621\u0629 277 V<\/td>\n<\/tr>\n<tr>\n<td>500 kVA\u060c 240 V \u062f\u0644\u062a\u0627 \u062b\u0627\u0646\u0648\u064a<\/td>\n<td>\u0661,\u0662\u0660\u0663 \u0623<\/td>\n<td>\u062a\u0648\u0632\u064a\u0639 \u062b\u0644\u0627\u062b\u064a \u0627\u0644\u0637\u0648\u0631 240 V \u0635\u0646\u0627\u0639\u064a \u0648\u062a\u0642\u0644\u064a\u062f\u064a<\/td>\n<\/tr>\n<tr>\n<td>500 kVA\u060c 208Y\/120 V \u062b\u0627\u0646\u0648\u064a<\/td>\n<td>\u0661,\u0663\u0668\u0668 \u0623<\/td>\n<td>\u0623\u062d\u0645\u0627\u0644 \u0645\u0622\u062e\u0630\/\u0625\u0636\u0627\u0621\u0629 120 V \u0645\u062a\u0639\u062f\u062f\u0629 \u0627\u0644\u0623\u0633\u0631 \u0648\u0627\u0644\u0639\u0642\u0627\u0631\u0627\u062a \u0627\u0644\u062a\u062c\u0627\u0631\u064a\u0629<\/td>\n<\/tr>\n<tr>\n<td>500 kVA\u060c 600 V \u062b\u0627\u0646\u0648\u064a<\/td>\n<td>\u0664\u0668\u0661 \u0623<\/td>\n<td>\u0645\u0631\u0627\u0641\u0642 \u0635\u0646\u0627\u0639\u064a\u0629 \u0645\u0639 \u0645\u0639\u062f\u0627\u062a 600 V (\u0625\u0642\u0644\u064a\u0645\u064a)<\/td>\n<\/tr>\n<tr>\n<td>500 kVA\u060c 240 V \u0623\u062d\u0627\u062f\u064a \u0627\u0644\u0637\u0648\u0631 (\u0645\u0631\u0643\u0632 \u0645\u0642\u0633\u0645)<\/td>\n<td>\u0662,\u0660\u0668\u0663 \u0623<\/td>\n<td>\u0646\u0627\u062f\u0631 \u0641\u064a \u0647\u0630\u0627 \u0627\u0644\u062d\u062c\u0645 \u2014 \u062a\u0623\u0643\u062f \u0645\u0646 \u0644\u0648\u062d\u0629 \u0627\u0644\u0627\u0633\u0645 \u0642\u0628\u0644 \u0627\u0644\u0627\u0641\u062a\u0631\u0627\u0636<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u062d\u0633\u0627\u0628 \u0627\u0644\u062d\u0645\u0644 \u0648\u0631\u0627\u0621 \u0647\u0630\u0647 \u0627\u0644\u0623\u0631\u0642\u0627\u0645 \u2014 \u0643\u0645 \u0645\u0646 500 kVA \u064a\u0645\u0643\u0646\u0643 \u0627\u0633\u062a\u062e\u062f\u0627\u0645\u0647 \u0641\u0639\u0644\u064a\u064b\u0627\u060c \u0648\u0645\u0627 \u0647\u064a \u0639\u0648\u0627\u0645\u0644 \u0627\u0644\u062a\u0646\u0648\u0639 \u0648\u0627\u0644\u0637\u0644\u0628 \u0627\u0644\u062a\u064a \u062a\u0646\u0637\u0628\u0642 \u2014 \u0647\u0648 \u0623\u0633\u0627\u0633 \u0627\u0644\u062a\u0635\u0645\u064a\u0645\u060c \u0648\u064a\u062a\u0645 \u0627\u0644\u0639\u0645\u0644 \u0639\u0644\u064a\u0647 \u0641\u064a \u062f\u0644\u064a\u0644 <a href=\"\/ar\/blog\/transformer-sizing-and-load-calculations\/\">\u062d\u0633\u0627\u0628 \u062d\u062c\u0645 \u0627\u0644\u0645\u062d\u0648\u0644 \u0648\u062d\u0633\u0627\u0628 \u0627\u0644\u062d\u0645\u0644<\/a>. \u064a\u0639\u0645\u0644 \u0627\u0644\u0645\u062d\u0648\u0644 \u0628\u0642\u062f\u0631\u0629 500 kVA \u0645\u0639 \u062d\u0645\u0644 \u0630\u0631\u0648\u0629 \u0642\u062f\u0631\u0647 400 kVA \u0639\u0646\u062f \u062d\u0645\u0644 80% \u0627\u0644\u0630\u064a \u064a\u0643\u0648\u0646 \u0645\u0631\u064a\u062d\u064b\u0627 \u0639\u0645\u0644\u064a\u064b\u0627 \u0645\u0646 \u062d\u064a\u062b \u0627\u0644\u0643\u0641\u0627\u0621\u0629 \u0648\u0627\u0644\u0627\u062d\u062a\u064a\u0627\u062c\u0627\u062a \u0627\u0644\u0645\u0633\u062a\u0642\u0628\u0644\u064a\u0629.<\/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=\"\u0627\u0644\u0637\u0648\u0628\u0648\u0644\u0648\u062c\u064a\u0627 \u0627\u0644\u0642\u064a\u0627\u0633\u064a\u0629 \u0627\u0644\u0623\u062d\u0627\u062f\u064a\u0629 \u0627\u0644\u062e\u0637 \u0644\u0645\u062d\u0648\u0644 \u0628\u0642\u062f\u0631\u0629 500 kVA\" width=\"1448\" height=\"1086\" \/><\/p>\n<h2>\u0627\u0644\u0637\u0648\u0628\u0648\u0644\u0648\u062c\u064a\u0627 \u0627\u0644\u0642\u064a\u0627\u0633\u064a\u0629 \u0627\u0644\u0623\u062d\u0627\u062f\u064a\u0629 \u0627\u0644\u062e\u0637 \u0644\u0645\u062d\u0648\u0644 \u0628\u0642\u062f\u0631\u0629 500 kVA<\/h2>\n<p>\u0641\u064a\u0645\u0627 \u064a\u0644\u064a \u0642\u0627\u0626\u0645\u0629 \u0628\u0627\u0644\u0639\u0646\u0627\u0635\u0631 \u0627\u0644\u062a\u0633\u0639\u0629 \u0641\u064a \u0627\u0644\u0631\u0633\u0645:<\/p>\n<table>\n<tbody>\n<tr>\n<th>#<\/th>\n<th>\u0627\u0644\u0639\u0646\u0635\u0631<\/th>\n<th>\u0645\u0627 \u064a\u062c\u0628 \u0639\u0631\u0636\u0647<\/th>\n<\/tr>\n<tr>\n<td>1<\/td>\n<td>\u062e\u062f\u0645\u0629 \u0627\u0644\u0645\u0631\u0627\u0641\u0642 \/ \u0646\u0642\u0637\u0629 \u0627\u0644\u0627\u062a\u0635\u0627\u0644<\/td>\n<td>\u062a\u064a\u0627\u0631 \u0627\u0644\u0639\u0637\u0644 \u0627\u0644\u0645\u062a\u0627\u062d\u060c \u062c\u0647\u062f \u0627\u0644\u062e\u062f\u0645\u0629\u060c \u0645\u0648\u0642\u0639 \u0627\u0644\u0639\u062f\u0627\u062f<\/td>\n<\/tr>\n<tr>\n<td>2<\/td>\n<td>\u0641\u0635\u0644 \u0627\u0644\u062e\u062f\u0645\u0629<\/td>\n<td>\u062a\u0635\u0646\u064a\u0641 \u0627\u0644\u0623\u0645\u0628\u064a\u0631\u060c \u063a\u0644\u0627\u0641 NEMA\u060c \u0646\u0648\u0639 \u0627\u0644\u0641\u064a\u0648\u0632 \u0623\u0648 \u0627\u0644\u0642\u0627\u0637\u0639<\/td>\n<\/tr>\n<tr>\n<td>3<\/td>\n<td>\u0627\u0644\u0645\u063a\u0630\u064a \u0627\u0644\u0631\u0626\u064a\u0633\u064a<\/td>\n<td>\u062d\u062c\u0645 \u0627\u0644\u0645\u0648\u0635\u0644\u060c \u0627\u0644\u0643\u0645\u064a\u0629\u060c \u0627\u0644\u0639\u0632\u0644\u060c \u0627\u0644\u0645\u0633\u0627\u0631 \u2014 \u0628\u0646\u0627\u0621\u064b \u0639\u0644\u0649 125% \u0645\u0646 FLA \u0627\u0644\u0631\u0626\u064a\u0633\u064a (751 A \u0644\u0640 601 A)<\/td>\n<\/tr>\n<tr>\n<td>4<\/td>\n<td>\u062d\u0645\u0627\u064a\u0629 \u0627\u0644\u062a\u064a\u0627\u0631 \u0627\u0644\u0632\u0627\u0626\u062f \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u0629<\/td>\n<td>\u0646\u0648\u0639 \u0627\u0644\u062c\u0647\u0627\u0632 \u0648\u0627\u0644\u062a\u0635\u0646\u064a\u0641 \u0648\u0641\u0642\u064b\u0627 \u0644\u062c\u062f\u0648\u0644 NEC 450.3(B)\u061b \u0627\u0644\u0641\u064a\u0648\u0632 \u0623\u0648 \u0627\u0644\u0642\u0627\u0637\u0639 \u0645\u0639 \u062a\u0635\u0646\u064a\u0641 AIC<\/td>\n<\/tr>\n<tr>\n<td>5<\/td>\n<td>\u0645\u062d\u0648\u0644 500 kVA<\/td>\n<td>kVA\u060c \u0627\u0644\u0641\u0648\u0644\u062a\u064a\u0629 \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u0629\/\u0627\u0644\u062b\u0627\u0646\u0648\u064a\u0629\u060c %Z\u060c \u0645\u062c\u0645\u0648\u0639\u0629 \u0627\u0644\u0645\u062a\u062c\u0647\u0627\u062a\u060c \u0627\u0644\u062a\u0648\u0635\u064a\u0644\u0627\u062a\u060c BIL\u060c \u0627\u0631\u062a\u0641\u0627\u0639 \u062f\u0631\u062c\u0629 \u0627\u0644\u062d\u0631\u0627\u0631\u0629\u060c \u0641\u0626\u0629 \u0627\u0644\u062a\u0628\u0631\u064a\u062f<\/td>\n<\/tr>\n<tr>\n<td>6<\/td>\n<td>\u062d\u0645\u0627\u064a\u0629 \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u0629 \u0627\u0644\u062b\u0627\u0646\u0648\u064a\u0629<\/td>\n<td>\u0642\u0627\u0637\u0639 \u0623\u0648 \u0641\u064a\u0648\u0632 \u0628\u062d\u062c\u0645 \u0627\u0644\u0645\u0648\u0635\u0644\u0627\u062a \u0627\u0644\u062b\u0627\u0646\u0648\u064a\u0629 \u0648\u0627\u0644\u0645\u062d\u0648\u0644 \u0648\u0641\u0642\u064b\u0627 \u0644\u0640 450.3(B)<\/td>\n<\/tr>\n<tr>\n<td>7<\/td>\n<td>\u0627\u0644\u0645\u0648\u0635\u0644\u0627\u062a \u0627\u0644\u062b\u0627\u0646\u0648\u064a\u0629<\/td>\n<td>125% \u0645\u0646 FLA \u0627\u0644\u062b\u0627\u0646\u0648\u064a\u0629\u060c \u0627\u062e\u062a\u064a\u0627\u0631 \u062c\u062f\u0648\u0644 \u0627\u0644\u0633\u0639\u0629\u060c \u0645\u062c\u0645\u0648\u0639\u0627\u062a \u0645\u062a\u0648\u0627\u0632\u064a\u0629 \u0625\u0630\u0627 \u0644\u0632\u0645 \u0627\u0644\u0623\u0645\u0631<\/td>\n<\/tr>\n<tr>\n<td>8<\/td>\n<td>\u0645\u0639\u062f\u0627\u062a \u0627\u0644\u062a\u0648\u0632\u064a\u0639<\/td>\n<td>\u0644\u0648\u062d\u0629 \u0645\u0641\u0627\u062a\u064a\u062d \u0623\u0648 \u0644\u0648\u062d\u0627\u062a \u062a\u0648\u0632\u064a\u0639 \u0645\u0639 \u062a\u0635\u0646\u064a\u0641 \u0627\u0644\u062d\u0627\u0641\u0644\u0629\u060c \u0627\u0644\u062c\u0647\u0627\u0632 \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u060c \u0648\u0627\u0644\u062a\u064a\u0627\u0631 \u0627\u0644\u0642\u0635\u064a\u0631 \u0627\u0644\u0645\u062a\u0627\u062d<\/td>\n<\/tr>\n<tr>\n<td>9<\/td>\n<td>\u0627\u0644\u062a\u0623\u0631\u064a\u0636 \u0648\u0627\u0644\u062a\u0631\u0627\u0628\u0637<\/td>\n<td>\u0645\u0648\u0635\u0644 \u0631\u0628\u0637 \u0627\u0644\u0646\u0638\u0627\u0645\u060c \u0645\u0648\u0635\u0644 \u0627\u0644\u0642\u0637\u0628 \u0627\u0644\u0623\u0631\u0636\u064a\u060c \u0648\u0645\u0648\u0635\u0644\u0627\u062a \u0627\u0644\u062a\u0623\u0631\u064a\u0636 \u0644\u0644\u0645\u0639\u062f\u0627\u062a \u0648\u0641\u0642\u064b\u0627 \u0644\u0640 NEC 250.30<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u064a\u062a\u063a\u064a\u0631 \u062a\u062e\u0637\u064a\u0637 \u0627\u0644\u0631\u0633\u0645 \u0628\u0646\u0627\u0621\u064b \u0639\u0644\u0649 \u062e\u064a\u0627\u0631\u064a\u0646 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kVA\u061f<\/h3>\n<p>\u0641\u064a \u0639\u0627\u0645 2026\u060c \u0633\u062a\u0643\u0648\u0646 \u062a\u0643\u0644\u0641\u0629 \u0645\u062d\u0648\u0644 \u062b\u0644\u0627\u062b\u064a \u0627\u0644\u0637\u0648\u0631 500 kVA \u0627\u0644\u0645\u062a\u0648\u0642\u0639\u0629 \u0641\u064a \u0627\u0644\u0633\u0648\u0642 \u0627\u0644\u0623\u0645\u0631\u064a\u0643\u064a\u0629 \u062d\u0648\u0627\u0644\u064a $10,000-25,000. \u0645\u0646 \u0627\u0644\u0645\u062d\u062a\u0645\u0644 \u0623\u0646 \u062a\u0643\u0648\u0646 \u062a\u0643\u0644\u0641\u0629 \u0627\u0644\u0648\u062d\u062f\u0627\u062a \u0627\u0644\u062f\u0627\u062e\u0644\u064a\u0629 \u0645\u0646 \u0627\u0644\u0646\u0648\u0639 \u0627\u0644\u062c\u0627\u0641 \u0623\u0639\u0644\u0649 \u0642\u0644\u064a\u0644\u0627\u064b\u060c \u0648\u0627\u0644\u0648\u062d\u062f\u0627\u062a \u0627\u0644\u0645\u0635\u0646\u0648\u0639\u0629 \u0645\u0646 \u0627\u0644\u0646\u062d\u0627\u0633 \u0627\u0644\u0645\u0645\u062a\u0627\u0632 \u0648\u0627\u0644\u0637\u0644\u0628\u0627\u062a \u0627\u0644\u0645\u062e\u0635\u0635\u0629 \u0623\u0643\u062b\u0631 \u0645\u0646 \u0630\u0644\u0643\u061b \u0639\u0646\u062f \u0627\u062d\u062a\u0633\u0627\u0628 \u0627\u0644\u062a\u0631\u0643\u064a\u0628\u060c \u062c\u0646\u0628\u064b\u0627 \u0625\u0644\u0649 \u062c\u0646\u0628 \u0645\u0639 \u0627\u0644\u0643\u0627\u0628\u0644 \u0627\u0644\u0636\u0631\u0648\u0631\u064a\u060c \u0648\u0623\u062c\u0647\u0632\u0629 \u0627\u0644\u062d\u0645\u0627\u064a\u0629\u060c \u0648\u0627\u0644\u0639\u0645\u0627\u0644\u0629\u060c \u0648\u0627\u0644\u062a\u0634\u063a\u064a\u0644\u060c \u0633\u062a\u0635\u0644 \u0627\u0644\u062a\u0643\u0644\u0641\u0629 \u0627\u0644\u0625\u062c\u0645\u0627\u0644\u064a\u0629 \u0625\u0644\u0649 \u0646\u0637\u0627\u0642 \u0645\u0646 $56,000 \u0625\u0644\u0649 $88,000\u060c \u0628\u064a\u0646\u0645\u0627 \u0642\u062f \u062a\u0643\u0644\u0641 \u0627\u0644\u062a\u0639\u062f\u064a\u0644\u0627\u062a \u0627\u0644\u0623\u0643\u0628\u0631 \u0623\u0643\u062b\u0631 \u0645\u0646 $100,000. \u064a\u0645\u0643\u0646 \u0623\u0646 \u062a\u0643\u0648\u0646 \u0627\u0644\u0645\u0646\u062a\u062c\u0627\u062a \u0627\u0644\u0645\u0633\u062a\u0648\u0631\u062f\u0629 \u0627\u0644\u0645\u0639\u062a\u0645\u062f\u0629 \u0645\u0646 \u0634\u0631\u0643\u0627\u062a Subian Electric \u0623\u0631\u062e\u0635 \u0628\u0646\u0633\u0628\u0629 30-45% \u0645\u0646 \u063a\u064a\u0631\u0647\u0627 \u0625\u0630\u0627 \u0643\u0627\u0646\u062a \u0627\u0644\u0645\u0648\u0627\u0635\u0641\u0627\u062a \u0645\u062a\u0637\u0627\u0628\u0642\u0629.<\/p>\n<h3>\u0645\u0627 \u0647\u064a \u0627\u0644\u0633\u0639\u0629 \u0627\u0644\u0642\u0635\u0648\u0649 \u0644\u0644\u062d\u0645\u0644 \u0644\u0645\u062d\u0648\u0644 500 kVA\u061f<\/h3>\n<p>\u0627\u0644\u0625\u062c\u0627\u0628\u0629 \u0639\u0644\u0649 \u0647\u0630\u0627 \u0627\u0644\u0633\u0624\u0627\u0644 \u0647\u064a 500 kVA\u060c \u0648\u0647\u0648 \u062a\u0635\u0646\u064a\u0641 \u0645\u0646 \u062d\u064a\u062b \u0627\u0644\u0642\u062f\u0631\u0629 \u0627\u0644\u0638\u0627\u0647\u0631\u0629\u060c \u0648\u0627\u0644\u0630\u064a \u064a\u062a\u0648\u0627\u0641\u0642 \u0639\u0627\u062f\u0629\u064b \u0645\u0639 \u062d\u0648\u0627\u0644\u064a 400 kW \u0645\u0646 \u062d\u064a\u062b \u0627\u0644\u0642\u062f\u0631\u0629 \u0627\u0644\u062d\u0642\u064a\u0642\u064a\u0629 \u0625\u0630\u0627 \u0643\u0627\u0646 \u0639\u0627\u0645\u0644 \u0627\u0644\u0642\u062f\u0631\u0629 \u064a\u0633\u0627\u0648\u064a 0.8. \u0648\u0627\u062d\u062f\u0629 \u0645\u0646 \u0627\u0644\u0645\u0639\u0627\u064a\u064a\u0631 \u0627\u0644\u0645\u0637\u0628\u0642\u0629 \u0641\u064a \u0627\u0644\u0635\u0646\u0627\u0639\u0629 \u0647\u064a \u062a\u062d\u0645\u064a\u0644 \u0627\u0644\u0645\u062d\u0648\u0644 \u0628\u0646\u0633\u0628\u0629 60-80% \u0645\u0646 \u0627\u0644\u062a\u0635\u0646\u064a\u0641 \u0628\u0633\u0628\u0628 \u0642\u062f\u0631\u062a\u0647 \u0639\u0644\u0649 \u062a\u062d\u0645\u0644 \u062d\u0645\u0644 \u0645\u062a\u0632\u0627\u064a\u062f. \u0628\u0627\u0644\u0625\u0636\u0627\u0641\u0629 \u0625\u0644\u0649 \u0630\u0644\u0643\u060c \u062a\u0648\u0641\u0631 \u062c\u062f\u0627\u0648\u0644 \u062a\u062d\u0645\u064a\u0644 ANSI\/IEEE \u0627\u0644\u0634\u0631\u0648\u0637 \u0627\u0644\u062a\u064a \u064a\u0645\u0643\u0646 \u0639\u0646\u062f\u0647\u0627 \u062a\u062d\u0645\u064a\u0644 \u0627\u0644\u0645\u062d\u0648\u0644 \u0645\u0639 \u0627\u062d\u062a\u0633\u0627\u0628 \u0627\u0644\u062d\u0645\u0644 \u0627\u0644\u0623\u0642\u0635\u0649 - \u0648\u0645\u0639 \u0630\u0644\u0643\u060c \u0645\u0646 \u0627\u0644\u0645\u0633\u062a\u062d\u0633\u0646 \u062f\u0627\u0626\u0645\u064b\u0627 \u0627\u0633\u062a\u0634\u0627\u0631\u0629 \u0645\u0646\u062d\u0646\u064a\u0627\u062a \u062a\u062d\u0645\u064a\u0644 \u0627\u0644\u0634\u0631\u0643\u0629 \u0627\u0644\u0645\u0635\u0646\u0639\u0629 \u0642\u0628\u0644 \u0627\u0644\u0627\u0639\u062a\u0645\u0627\u062f \u0639\u0644\u0649 \u0630\u0644\u0643.<\/p>\n<h3>\u0643\u064a\u0641\u064a\u0629 \u062d\u0633\u0627\u0628 \u062d\u062c\u0645 \u0627\u0644\u0643\u0627\u0628\u0644 \u0644\u0645\u062d\u0648\u0644\u0627\u062a 500 kVA\u061f<\/h3>\n<p>\u0623\u0648\u0644\u0627\u064b\u060c \u0645\u0646 \u0627\u0644\u0636\u0631\u0648\u0631\u064a \u062d\u0633\u0627\u0628 \u062a\u064a\u0627\u0631 \u0627\u0644\u062d\u0645\u0644 \u0627\u0644\u0643\u0627\u0645\u0644 \u0644\u0644\u0645\u062d\u0648\u0644 (\u0639\u0644\u0649 \u0633\u0628\u064a\u0644 \u0627\u0644\u0645\u062b\u0627\u0644\u060c \u0639\u0646\u062f 480 \u0641\u0648\u0644\u062a \u064a\u0633\u0627\u0648\u064a 601 \u0623\u0645\u0628\u064a\u0631)\u060c \u0648\u0628\u0639\u062f \u0630\u0644\u0643\u060c \u064a\u062c\u0628 \u062a\u0639\u062f\u064a\u0644 \u0627\u0644\u0642\u064a\u0645\u0629 \u0627\u0644\u0645\u0643\u062a\u0634\u0641\u0629 \u0648\u0641\u0642\u064b\u0627 \u0644\u0644\u0631\u0642\u0645 125% \u0644\u0644\u062a\u0634\u063a\u064a\u0644 \u0627\u0644\u0645\u0633\u062a\u0645\u0631. \u0628\u0639\u062f \u0630\u0644\u0643\u060c \u064a\u0645\u0643\u0646 \u0627\u062e\u062a\u064a\u0627\u0631 \u0627\u0644\u0623\u0633\u0644\u0627\u0643 \u0648\u0641\u0642\u064b\u0627 \u0644\u062c\u062f\u0627\u0648\u0644 \u0627\u0644\u0633\u0639\u0629 \u0627\u0644\u062d\u0627\u0644\u064a\u0629 \u0627\u0644\u0645\u0642\u062f\u0645\u0629 \u0645\u0646 NEC\u060c \u0645\u0639 \u062a\u0630\u0643\u0631 \u062a\u0637\u0628\u064a\u0642 \u0627\u0644\u062a\u0635\u062d\u064a\u062d \u0627\u0644\u0645\u0646\u0627\u0633\u0628 \u0627\u0639\u062a\u0645\u0627\u062f\u064b\u0627 \u0639\u0644\u0649 \u0646\u0648\u0639 \u0627\u0644\u0639\u0632\u0644 \u0627\u0644\u0645\u0633\u062a\u062e\u062f\u0645.<\/p>\n<h2>\u0627\u0644\u0645\u0631\u0627\u062c\u0639<\/h2>\n<ul>\n<li><a href=\"https:\/\/www.nfpa.org\/\" rel=\"nofollow noopener\" target=\"_blank\">NFPA \u2014 \u0627\u0644\u0643\u0648\u062f \u0627\u0644\u0643\u0647\u0631\u0628\u0627\u0626\u064a \u0627\u0644\u0648\u0637\u0646\u064a (\u0627\u0644\u0645\u0627\u062f\u0629 450\u060c \u0627\u0644\u0645\u0627\u062f\u0629 250)<\/a><\/li>\n<li><a href=\"https:\/\/standards.ieee.org\/\" rel=\"nofollow noopener\" target=\"_blank\">IEEE \u2014 \u0633\u0644\u0633\u0644\u0629 C57.12\u060c \u0645\u062a\u0637\u0644\u0628\u0627\u062a \u0627\u0644\u0645\u0639\u0627\u064a\u064a\u0631 \u0644\u0644\u0645\u062d\u0648\u0644\u0627\u062a<\/a><\/li>\n<li><a href=\"https:\/\/www.energy.gov\/\" rel=\"nofollow noopener\" target=\"_blank\">\u0648\u0632\u0627\u0631\u0629 \u0627\u0644\u0637\u0627\u0642\u0629 \u0627\u0644\u0623\u0645\u0631\u064a\u0643\u064a\u0629 \u2014 \u0645\u0639\u0627\u064a\u064a\u0631 \u0643\u0641\u0627\u0621\u0629 \u0627\u0644\u0645\u062d\u0648\u0644\u0627\u062a \u0627\u0644\u062a\u0648\u0632\u064a\u0639\u064a\u0629<\/a><\/li>\n<li><a href=\"https:\/\/www.osha.gov\/\" rel=\"nofollow noopener\" target=\"_blank\">OSHA \u2014 \u0645\u062a\u0637\u0644\u0628\u0627\u062a \u0627\u0644\u0633\u0644\u0627\u0645\u0629 \u0627\u0644\u0643\u0647\u0631\u0628\u0627\u0626\u064a\u0629 \u0644\u0645\u0645\u0627\u0631\u0633\u0627\u062a \u0627\u0644\u0639\u0645\u0644<\/a><\/li>\n<\/ul>\n<h2>\u0627\u0644\u062e\u0627\u062a\u0645\u0629<\/h2>\n<p>\u0642\u062f \u0644\u0627 \u062a\u0628\u062f\u0648 \u0627\u0644\u0645\u062e\u0637\u0637\u0627\u062a \u0627\u0644\u0623\u062d\u0627\u062f\u064a\u0629 \u0644\u0645\u062d\u0648\u0644\u0627\u062a 500 kVA \u0643\u062b\u064a\u0631\u0629\u060c \u0644\u0643\u0646\u0647\u0627 \u0627\u0644\u0648\u062b\u064a\u0642\u0629 \u0627\u0644\u062a\u064a \u062a\u0646\u0642\u0644 \u0627\u0644\u0648\u0636\u0639 \u0628\u0627\u0644\u0643\u0627\u0645\u0644 \u0625\u0644\u0649 \u0627\u0644\u0645\u0642\u0627\u0648\u0644 \u0627\u0644\u0643\u0647\u0631\u0628\u0627\u0626\u064a\u060c \u0648\u0627\u0644\u0645\u0641\u062a\u0634\u060c \u0648\u0643\u0630\u0644\u0643 \u0627\u0644\u0645\u0631\u0627\u0641\u0642 \u062d\u0648\u0644 \u0627\u0644\u062a\u0634\u063a\u064a\u0644\u060c \u0648\u0627\u0644\u0623\u062a\u0645\u062a\u0629\u060c \u0648\u0627\u0644\u062a\u0623\u0631\u064a\u0636\u060c \u0648\u062a\u0648\u0632\u064a\u0639 \u062a\u0631\u0643\u064a\u0628 \u0643\u0647\u0631\u0628\u0627\u0626\u064a \u0628\u062c\u0647\u062f \u0645\u062a\u0648\u0633\u0637. \u0645\u0646 \u0627\u0644\u0636\u0631\u0648\u0631\u064a \u0625\u062c\u0631\u0627\u0621 \u0627\u0644\u0639\u0645\u0644\u064a\u0627\u062a \u0628\u0627\u0644\u062a\u0631\u062a\u064a\u0628 \u0627\u0644\u0635\u062d\u064a\u062d. \u0623\u0648\u0644\u0627\u064b\u060c \u064a\u062c\u0628 \u0625\u062c\u0631\u0627\u0621 \u0627\u0644\u062e\u062f\u0645\u0629 \u0648\u0627\u0644\u0642\u064a\u0627\u0633\u061b \u062b\u0627\u0646\u064a\u064b\u0627\u060c \u064a\u062c\u0628 \u0625\u064a\u0642\u0627\u0641 \u0627\u0644\u062e\u062f\u0645\u0629. \u062a\u0634\u0645\u0644 \u0627\u0644\u062e\u0637\u0648\u0629 \u0627\u0644\u062a\u0627\u0644\u064a\u0629 \u0627\u0644\u0645\u0648\u0635\u0644 \u0627\u0644\u0631\u0626\u064a\u0633\u064a \u0648\u0627\u0644\u062d\u0645\u0627\u064a\u0629 \u0627\u0644\u0623\u0648\u0644\u064a\u0629 \u0628\u0646\u0627\u0621\u064b \u0639\u0644\u0649 NEC 450.3(B). \u062b\u0645\u060c \u0647\u0646\u0627\u0643 \u0645\u0639\u0644\u0648\u0645\u0627\u062a \u062d\u0648\u0644 \u0627\u0644\u0645\u062d\u0648\u0644 500 kVA \u0646\u0641\u0633\u0647 \u0648\u064a\u062c\u0628 \u062a\u0642\u062f\u064a\u0645 \u0628\u064a\u0627\u0646\u0627\u062a \u0644\u0648\u062d\u0629 \u0627\u0644\u0627\u0633\u0645 \u0627\u0644\u062e\u0627\u0635\u0629 \u0628\u0647. \u0628\u0639\u062f \u0630\u0644\u0643\u060c \u064a\u062a\u0645 \u062a\u0648\u0641\u064a\u0631 \u0627\u0644\u062b\u0627\u0646\u0648\u064a\u060c \u0628\u0627\u0644\u0625\u0636\u0627\u0641\u0629 \u0625\u0644\u0649 \u0627\u0644\u0623\u0633\u0644\u0627\u0643 \u0641\u064a\u0645\u0627 \u064a\u062a\u0639\u0644\u0642 \u0628\u0640 125% \u0645\u0646 \u0627\u0644\u062d\u0645\u0644 \u0627\u0644\u0645\u0637\u0644\u0648\u0628 \u0627\u0644\u0645\u062d\u0633\u0648\u0628 \u0645\u0646 \u0628\u064a\u0646 \u0623\u0634\u064a\u0627\u0621 \u0623\u062e\u0631\u0649. \u064a\u062c\u0628 \u0645\u0644\u0627\u062d\u0638\u0629 \u0623\u0646 \u0627\u0644\u0645\u062e\u0637\u0637 \u064a\u062c\u0628 \u0623\u0646 \u064a\u064f\u0645\u0644\u0623 \u0623\u064a\u0636\u064b\u0627 \u0628\u062c\u0645\u064a\u0639 \u0628\u064a\u0627\u0646\u0627\u062a \u0627\u0644\u0645\u0648\u0627\u0635\u0641\u0627\u062a \u062d\u0648\u0644 \u0627\u0644\u062a\u0635\u0646\u064a\u0641\u0627\u062a\u060c \u0648\u0627\u0644\u0645\u0645\u0627\u0646\u0639\u0629\u060c \u0648\u0645\u062c\u0645\u0648\u0639\u0629 \u0627\u0644\u0645\u062a\u062c\u0647\u0627\u062a\u060c \u0648\u0627\u0644\u062a\u0648\u0635\u064a\u0644\u0627\u062a\u060c \u0648\u0627\u0644\u0645\u0648\u0635\u0644\u0627\u062a\u060c \u0648\u0627\u0644\u062a\u064a\u0627\u0631\u0627\u062a \u0627\u0644\u0642\u0635\u064a\u0631\u0629. \u0644\u0630\u0644\u0643\u060c \u064a\u0635\u0628\u062d \u0645\u0646 \u0627\u0644\u0636\u0631\u0648\u0631\u064a \u0645\u0644\u0621 \u0627\u0644\u0645\u062e\u0637\u0637 \u0648\u062a\u0645\u0631\u064a\u0631\u0647 \u0625\u0644\u0649 \u0627\u0644\u0645\u0647\u0646\u062f\u0633\u064a\u0646 \u0648\u0627\u0644\u062e\u0628\u0631\u0627\u0621 \u0627\u0644\u0622\u062e\u0631\u064a\u0646\u060c \u0648\u0627\u0644\u0645\u0631\u0627\u0641\u0642\u060c \u0648\u0627\u0644\u062c\u0647\u0627\u062a \u0627\u0644\u0645\u062e\u062a\u0635\u0629\u060c \u0648\u0645\u0627 \u0625\u0644\u0649 \u0630\u0644\u0643.<\/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 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