{"id":2722,"date":"2026-08-22T14:27:00","date_gmt":"2026-08-22T14:27:00","guid":{"rendered":"https:\/\/lbajiele.com\/?p=2722"},"modified":"2026-10-23T00:44:33","modified_gmt":"2026-10-23T00:44:33","slug":"75-kva-transformer-amps-guide","status":"publish","type":"post","link":"https:\/\/lbajiele.com\/ar\/blog\/75-kva-transformer-amps-guide\/","title":{"rendered":"\u0623\u0645\u0628\u064a\u0631 \u0645\u062d\u0648\u0644 75 \u0643\u064a\u0644\u0648 \u0641\u0648\u0644\u062a \u0623\u0645\u0628\u064a\u0631: \u062f\u0644\u064a\u0644 \u0627\u0644\u062a\u064a\u0627\u0631 \u0627\u0644\u0627\u0628\u062a\u062f\u0627\u0626\u064a \u0648\u0627\u0644\u062b\u0627\u0646\u0648\u064a"},"content":{"rendered":"<p><strong>\u0645\u062d\u0648\u0644 \u0628\u0642\u062f\u0631\u0629 75 \u0643\u064a\u0644\u0648 \u0641\u0648\u0644\u062a \u0623\u0645\u0628\u064a\u0631 \u0644\u064a\u0633 \u0644\u0647 \u062a\u0635\u0646\u064a\u0641 \u0623\u0645\u0628\u064a\u0631 \u062b\u0627\u0628\u062a \u0648\u0627\u062d\u062f.<\/strong> Current depends on phase and voltage: single-phase current is 75,000 \u00f7 V; three-phase line current is 75,000 \u00f7 (1.732 \u00d7 V). For example, 75 kVA is about 90.2 A at 480 V three-phase and 208.2 A at 208 V three-phase.<\/p>\n<div class=\"lbaji-key-takeaways\">\n<h2>\u0627\u0644\u0646\u0642\u0627\u0637 \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u0629<\/h2>\n<ul>\n<li>At 75 kVA, full-load amps depend on phase and the voltage at the side being measured.<\/li>\n<li>At 480 V three phase the result is 90.2 A; at 208 V three phase it is 208.2 A.<\/li>\n<li>These are winding current calculations, not automatic breaker, cable, or safe continuous-load ratings.<\/li>\n<\/ul>\n<\/div>\n<h2>\u0635\u0645\u0639\u0629 \u062a\u064a\u0627\u0631 75 \u0643\u064a\u0644\u0648 \u0641\u0648\u0644\u062a \u0623\u0645\u0628\u064a\u0631 (75 kVA Current Formula)\n\n\u0644\u0644\u062d\u0633\u0627\u0628\u060c \u064a\u0639\u062a\u0645\u062f \u0627\u0644\u0642\u0627\u0646\u0648\u0646 \u0639\u0644\u0649 \u0643\u0648\u0646 \u0627\u0644\u062a\u064a\u0627\u0631 \u0623\u062d\u0627\u062f\u064a \u0627\u0644\u0637\u0648\u0631 (Single Phase) \u0623\u0648 \u062b\u0644\u0627\u062b\u064a \u0627\u0644\u0637\u0648\u0631 (Three Phase):\n\n1. **\u062b\u0644\u0627\u062b\u064a \u0627\u0644\u0637\u0648\u0631 (Three Phase - \u0627\u0644\u0623\u0643\u062b\u0631 \u0634\u064a\u0648\u0639\u0627\u064b \u0639\u0646\u062f \u062c\u0647\u062f 400 \u0641\u0648\u0644\u062a):**\n   $$\\text{Current (Amps)} = \\frac{\\text{kVA} \\times 1000}{\\text{Voltage} \\times \\sqrt{3}}$$\n   \u0628\u0627\u0641\u062a\u0631\u0627\u0636 \u0623\u0646 \u0627\u0644\u062c\u0647\u062f \u0647\u0648 400 \u0641\u0648\u0644\u062a:\n   $$\\text{Current} = \\frac{75 \\times 1000}{400 \\times 1.732} \\approx 108.25 \\text{ \u0623\u0645\u0628\u064a\u0631}$$\n\n2. **\u0623\u062d\u0627\u062f\u064a \u0627\u0644\u0637\u0648\u0631 (Single Phase - \u0639\u0646\u062f \u062c\u0647\u062f 230 \u0641\u0648\u0644\u062a):**\n   $$\\text{Current (Amps)} = \\frac{\\text{kVA} \\times 1000}{\\text{Voltage}}$$\n   \u0628\u0627\u0641\u062a\u0631\u0627\u0636 \u0623\u0646 \u0627\u0644\u062c\u0647\u062f \u0647\u0648 230 \u0641\u0648\u0644\u062a:\n   $$\\text{Current} = \\frac{75 \\times 1000}{230} \\approx 326.08 \\text{ \u0623\u0645\u0628\u064a\u0631}$$<\/h2>\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" alt=\"Three-phase transformer and switchboard used for full-load current calculations\" loading=\"lazy\" src=\"https:\/\/lbajiele.com\/wp-content\/uploads\/2026\/08\/three-phase-kva-to-amps.png\"\/><figcaption>\u0645\u062d\u0648\u0644 \u062b\u0644\u0627\u062b\u064a \u0627\u0644\u0623\u0637\u0648\u0627\u0631 \u0648\u0644\u0648\u062d\u0629 \u062a\u0648\u0632\u064a\u0639 \u062a\u0633\u062a\u062e\u062f\u0645 \u0644\u062d\u0633\u0627\u0628\u0627\u062a \u062a\u064a\u0627\u0631 \u0627\u0644\u062d\u0645\u0644 \u0627\u0644\u0643\u0627\u0645\u0644.<\/figcaption><\/figure>\n<p>\u0628\u0627\u0644\u0646\u0633\u0628\u0629 \u0644\u0644\u0648\u062c\u0647 \u0627\u0644\u0623\u062d\u0627\u062f\u0649\u060c \u0627\u0644\u062a\u064a\u0627\u0631 = (\u0643\u064a\u0644\u0648 \u0641\u0648\u0644\u062a \u0623\u0645\u0628\u064a\u0631 \u00d7 1,000) \u00f7 \u0627\u0644\u062c\u0647\u062f. \u0623\u0645\u0627 \u0628\u0627\u0644\u0646\u0633\u0628\u0629 \u0644\u0644\u0648\u062c\u0647 \u0627\u0644\u062b\u0644\u0627\u062b\u0649\u060c \u0627\u0644\u062a\u064a\u0627\u0631 = (\u0643\u064a\u0644\u0648 \u0641\u0648\u0644\u062a \u0623\u0645\u0628\u064a\u0631 \u00d7 1,000) \u00f7 (\u0627\u0644\u062c\u0630\u0631 \u0627\u0644\u062a\u0631\u0628\u064a\u0639\u0649 \u0644\u0640 3 \u00d7 \u062c\u0647\u062f \u0627\u0644\u062e\u0637 \u0644\u0644\u062e\u0637). \u0627\u0633\u062a\u062e\u062f\u0645 \u062c\u0647\u062f \u0644\u0648\u062d\u0629 \u0627\u0644\u0628\u064a\u0627\u0646\u0627\u062a \u0628\u062f\u0644\u0627\u064b \u0645\u0646 \u0627\u0644\u0627\u0641\u062a\u0631\u0627\u0636 \u0627\u0644\u0627\u0633\u0645\u064a. \u062a\u0635\u0641 \u0647\u0630\u0647 \u0627\u0644\u0645\u0639\u0627\u062f\u0644\u0627\u062a \u062a\u064a\u0627\u0631 \u0627\u0644\u062d\u0645\u0644 \u0627\u0644\u0638\u0627\u0647\u0631\u064a \u0627\u0644\u0643\u0627\u0645\u0644\u061b \u0648\u0645\u0639 \u0630\u0644\u0643\u060c \u0641\u0625\u0646 \u062a\u062d\u062f\u064a\u062f \u062d\u062c\u0645 \u0627\u0644\u0645\u0648\u0635\u0644\u0627\u062a \u0648\u0623\u062c\u0647\u0632\u0629 \u0627\u0644\u062d\u0645\u0627\u064a\u0629 \u064a\u0638\u0644 \u062e\u0627\u0636\u0639\u0627\u064b \u0644\u0644\u0643\u0648\u062f \u0627\u0644\u0645\u0639\u0645\u0648\u0644 \u0628\u0647\u060c \u0648\u0648\u0627\u062c\u0628 \u0627\u0644\u062a\u062d\u0645\u064a\u0644\u060c \u0648\u062f\u0631\u062c\u0629 \u0627\u0644\u062d\u0631\u0627\u0631\u0629\u060c \u0648\u0637\u0631\u064a\u0642\u0629 \u0627\u0644\u062a\u0631\u0643\u064a\u0628.<\/p>\n<section class=\"lbaji-article-table\">\n<h2>\u062c\u062f\u0648\u0644 \u0645\u0642\u0627\u0631\u0646\u0629 \u0648\u0627\u062e\u062a\u064a\u0627\u0631 \u0633\u0631\u064a\u0639<\/h2>\n<p>\u0627\u0633\u062a\u062e\u062f\u0645 \u0647\u0630\u0627 \u0627\u0644\u062c\u062f\u0648\u0644 \u0643\u0645\u0631\u0627\u062c\u0639\u0629 \u0633\u0631\u064a\u0639\u0629 \u0644\u0642\u0631\u0627\u0631\u0627\u062a \u0627\u0644\u0647\u0646\u062f\u0633\u0629 \u0648\u0627\u0644\u0645\u0634\u062a\u0631\u064a\u0627\u062a \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u0629 \u0627\u0644\u062a\u064a \u062a\u0645 \u0634\u0631\u062d\u0647\u0627 \u0641\u064a \u0627\u0644\u0645\u0642\u0627\u0644.<\/p>\n<figure class=\"wp-block-table is-style-stripes\" style=\"overflow-x:auto;max-width:100%\">\n<table>\n<thead>\n<tr>\n<th scope=\"col\">\u0645\u0646\u0637\u0642\u0629 \u0627\u0644\u0642\u0631\u0627\u0631<\/th>\n<th scope=\"col\">\u0627\u0644\u0645\u0639\u0646\u0649 \u0627\u0644\u0639\u0645\u0644\u064a<\/th>\n<th scope=\"col\">\u0645\u0627 \u0627\u0644\u0630\u064a \u064a\u062c\u0628 \u0627\u0644\u062a\u062d\u0642\u0642 \u0645\u0646\u0647<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u0635\u0645\u0639\u0629 \u062a\u064a\u0627\u0631 75 \u0643\u064a\u0644\u0648 \u0641\u0648\u0644\u062a \u0623\u0645\u0628\u064a\u0631 (75 kVA Current Formula)\n\n\u0644\u0644\u062d\u0633\u0627\u0628\u060c \u064a\u0639\u062a\u0645\u062f \u0627\u0644\u0642\u0627\u0646\u0648\u0646 \u0639\u0644\u0649 \u0643\u0648\u0646 \u0627\u0644\u062a\u064a\u0627\u0631 \u0623\u062d\u0627\u062f\u064a \u0627\u0644\u0637\u0648\u0631 (Single Phase) \u0623\u0648 \u062b\u0644\u0627\u062b\u064a \u0627\u0644\u0637\u0648\u0631 (Three Phase):\n\n1. **\u062b\u0644\u0627\u062b\u064a \u0627\u0644\u0637\u0648\u0631 (Three Phase - \u0627\u0644\u0623\u0643\u062b\u0631 \u0634\u064a\u0648\u0639\u0627\u064b \u0639\u0646\u062f \u062c\u0647\u062f 400 \u0641\u0648\u0644\u062a):**\n   $$\\text{Current (Amps)} = \\frac{\\text{kVA} \\times 1000}{\\text{Voltage} \\times \\sqrt{3}}$$\n   \u0628\u0627\u0641\u062a\u0631\u0627\u0636 \u0623\u0646 \u0627\u0644\u062c\u0647\u062f \u0647\u0648 400 \u0641\u0648\u0644\u062a:\n   $$\\text{Current} = \\frac{75 \\times 1000}{400 \\times 1.732} \\approx 108.25 \\text{ \u0623\u0645\u0628\u064a\u0631}$$\n\n2. **\u0623\u062d\u0627\u062f\u064a \u0627\u0644\u0637\u0648\u0631 (Single Phase - \u0639\u0646\u062f \u062c\u0647\u062f 230 \u0641\u0648\u0644\u062a):**\n   $$\\text{Current (Amps)} = \\frac{\\text{kVA} \\times 1000}{\\text{Voltage}}$$\n   \u0628\u0627\u0641\u062a\u0631\u0627\u0636 \u0623\u0646 \u0627\u0644\u062c\u0647\u062f \u0647\u0648 230 \u0641\u0648\u0644\u062a:\n   $$\\text{Current} = \\frac{75 \\times 1000}{230} \\approx 326.08 \\text{ \u0623\u0645\u0628\u064a\u0631}$$<\/td>\n<td>\u0628\u0627\u0644\u0646\u0633\u0628\u0629 \u0644\u0644\u0648\u062c\u0647 \u0627\u0644\u0648\u0627\u062d\u062f (\u0623\u062d\u0627\u062f\u064a \u0627\u0644\u0637\u0648\u0631)\u060c $I = kVA \\times 1,000 \\div V$.<\/td>\n<td>\u0644\u0644\u062b\u0644\u0627\u062b\u064a \u0627\u0644\u0623\u0637\u0648\u0627\u0631\u060c \u0627\u0644\u062a\u064a\u0627\u0631 (I) = \u0643\u064a\u0644\u0648 \u0641\u0648\u0644\u062a \u0623\u0645\u0628\u064a\u0631 (kVA) \u00d7 1,000 \u00f7 (\u0627\u0644\u062c\u0630\u0631 \u0627\u0644\u062a\u0631\u0628\u064a\u0639\u064a \u0644\u0640 3 \u00d7 \u062c\u0647\u062f \u0627\u0644\u062e\u0637 \u0644\u0644\u062e\u0637).<\/td>\n<\/tr>\n<tr>\n<td>\u062a\u064a\u0627\u0631\u0627\u062a \u0627\u0644\u062d\u0645\u0644 \u0627\u0644\u0643\u0627\u0645\u0644 \u0627\u0644\u0634\u0627\u0626\u0639\u0629 \u0644\u0640 75 \u0643\u064a\u0644\u0648 \u0641\u0648\u0644\u062a \u0623\u0645\u0628\u064a\u0631<\/td>\n<td>\u0639\u0646\u062f \u062c\u0647\u062f 240 \u0641\u0648\u0644\u062a \u0623\u062d\u0627\u062f\u064a \u0627\u0644\u0637\u0648\u0631\u060c \u064a\u0643\u0648\u0646 \u0627\u0644\u062a\u064a\u0627\u0631 \u0627\u0644\u0645\u062d\u0633\u0648\u0628 312.5 \u0623\u0645\u0628\u064a\u0631\u060c \u0648\u0639\u0646\u062f \u062c\u0647\u062f 480 \u0641\u0648\u0644\u062a \u0623\u062d\u0627\u062f\u064a \u0627\u0644\u0637\u0648\u0631 \u064a\u0643\u0648\u0646 156.3 \u0623\u0645\u0628\u064a\u0631.<\/td>\n<td>For three phase, common results are 90.2 A at 480 V, 104.3 A at 415 V, 108.3 A at 400 V, 208.2 A at 208 V and 180.4 A at 240 V.<\/td>\n<\/tr>\n<tr>\n<td>\u0627\u0644\u0645\u0636\u062e\u0645\u0627\u062a \u0627\u0644\u0623\u0648\u0644\u064a\u0629 \u0648\u0627\u0644\u062b\u0627\u0646\u0648\u064a\u0629<\/td>\n<td>\u064a\u062d\u0645\u0644 \u0648\u062d\u062f\u0629 \u062b\u0644\u0627\u062b\u064a\u0629 \u0627\u0644\u0637\u0648\u0631 \u0628\u0642\u062f\u0631\u0629 480 \u0625\u0644\u0649 208Y\/120 \u0641\u0648\u0644\u062a \u062d\u0648\u0627\u0644\u064a 90 \u0623\u0645\u0628\u064a\u0631 \u0639\u0644\u0649 \u062c\u0627\u0646\u0628 480 \u0641\u0648\u0644\u062a \u0648 208 \u0623\u0645\u0628\u064a\u0631 \u0639\u0644\u0649 \u062c\u0627\u0646\u0628 208 \u0641\u0648\u0644\u062a \u0639\u0646\u062f 75 \u0643\u064a\u0644\u0648 \u0641\u0648\u0644\u062a \u0623\u0645\u0628\u064a\u0631.<\/td>\n<td>\u064a\u063a\u064a\u0631 \u0627\u0644\u0645\u062d\u0648\u0644 \u0639\u0644\u0627\u0642\u0629 \u0627\u0644\u062c\u0647\u062f \u0648\u0627\u0644\u062a\u064a\u0627\u0631 \u0628\u064a\u0646\u0645\u0627 \u062a\u0628\u0642\u0649 \u0627\u0644\u0642\u062f\u0631\u0629 \u0627\u0644\u0638\u0627\u0647\u0631\u064a\u0629 \u062b\u0627\u0628\u062a\u0629 \u062a\u0642\u0631\u064a\u0628\u0627\u064b\u060c \u0628\u0627\u0633\u062a\u062b\u0646\u0627\u0621 \u0627\u0644\u0641\u0642\u062f.<\/td>\n<\/tr>\n<tr>\n<td>\u062d\u062c\u0645 \u0642\u0627\u0637\u0639 \u0627\u0644\u062f\u0627\u0626\u0631\u0629 \u0648\u0627\u0644\u0645\u0648\u0635\u0644<\/td>\n<td>\u0644\u0627 \u062a\u062e\u062a\u0627\u0631 \u0642\u0648\u0627\u0637\u0639 \u0627\u0644\u062f\u0627\u0626\u0631\u0629 \u0628\u0646\u0627\u0621\u064b \u0639\u0644\u0649 \u0631\u0642\u0645 \u0627\u0644\u062d\u0645\u0644 \u0627\u0644\u0643\u0627\u0645\u0644 \u0648\u062d\u062f\u064e\u0647.<\/td>\n<td>\u062a\u0633\u0645\u062d \u0627\u0644\u0643\u0648\u062f\u0627\u062a (\u0627\u0644\u0642\u0648\u0627\u0646\u064a\u0646\/\u0627\u0644\u0644\u0648\u0627\u0626\u062d) \u0623\u0648 \u062a\u0637\u0644\u0628 \u062a\u0631\u062a\u064a\u0628\u0627\u062a \u062d\u0645\u0627\u064a\u0629 \u0645\u062d\u062f\u062f\u0629 \u0623\u0633\u0627\u0633\u064a\u0629 \u0641\u0642\u0637 \u0623\u0648 \u0623\u0633\u0627\u0633\u064a\u0629 \u0648\u0627\u0636\u062d\u0629\u060c \u0648\u062a\u0623\u062e\u0630 \u0641\u064a \u0627\u0644\u0627\u0639\u062a\u0628\u0627\u0631 \u062a\u064a\u0627\u0631\u0627\u062a \u0627\u0644\u062a\u062f\u0641\u0642 (\u0623\u0648 \u0627\u0644\u0627\u0646\u062f\u0641\u0627\u0639).<\/td>\n<\/tr>\n<tr>\n<td>\u0647\u0644 \u0642\u062f\u0631\u0629 75 \u0643\u064a\u0644\u0648 \u0641\u0648\u0644\u062a \u0623\u0645\u0628\u064a\u0631 \u0643\u0628\u064a\u0631\u0629 \u0628\u0645\u0627 \u064a\u0643\u0641\u064a\u061f<\/td>\n<td>\u0623\u0636\u0641 \u0627\u0644\u062d\u0645\u0644 \u0628\u0627\u0644\u0643\u064a\u0644\u0648\u0641\u0648\u0644\u062a \u0623\u0645\u0628\u064a\u0631 (kVA) \u0628\u062f\u0644\u0627\u064b \u0645\u0646 \u0627\u0643\u062a\u0641\u0627\u0621 \u0628\u062c\u0645\u0639 \u0627\u0644\u0623\u0645\u0628\u064a\u0631\u0627\u062a \u0639\u0628\u0631 \u0627\u0644\u062c\u0647\u0648\u062f \u0627\u0644\u0645\u062e\u062a\u0644\u0641\u0629.<\/td>\n<td>\u0636\u0639 \u0641\u064a \u0627\u0639\u062a\u0628\u0627\u0631\u0643 \u0627\u0644\u0637\u0644\u0628\u060c \u0648\u0628\u062f\u0621 \u062a\u0634\u063a\u064a\u0644 \u0627\u0644\u0645\u062d\u0631\u0643\u060c \u0648\u0627\u0644\u062a\u0648\u0627\u0641\u0642\u064a\u0627\u062a \u063a\u064a\u0631 \u0627\u0644\u062e\u0637\u064a\u0629\u060c \u0627\u0644\u062a\u0648\u0633\u0639 \u0627\u0644\u0645\u0633\u062a\u0642\u0628\u0644\u064a\u060c \u0648\u062f\u0631\u062c\u0629 \u0627\u0644\u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u0645\u062d\u064a\u0637\u0629\u060c \u0648\u062a\u0646\u0638\u064a\u0645 \u0627\u0644\u062c\u0647\u062f \u0627\u0644\u0645\u0642\u0628\u0648\u0644.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n<\/section>\n<h2>\u062a\u064a\u0627\u0631\u0627\u062a \u0627\u0644\u062d\u0645\u0644 \u0627\u0644\u0643\u0627\u0645\u0644 \u0627\u0644\u0634\u0627\u0626\u0639\u0629 \u0644\u0640 75 \u0643\u064a\u0644\u0648 \u0641\u0648\u0644\u062a \u0623\u0645\u0628\u064a\u0631<\/h2>\n<p>At 240 V single phase the calculated current is 312.5 A, and at 480 V single phase it is 156.3 A. For three phase, common results are 90.2 A at 480 V, 104.3 A at 415 V, 108.3 A at 400 V, 208.2 A at 208 V and 180.4 A at 240 V. Rounding should not be used to conceal a voltage mismatch.<\/p>\n<h2>\u0627\u0644\u0645\u0636\u062e\u0645\u0627\u062a \u0627\u0644\u0623\u0648\u0644\u064a\u0629 \u0648\u0627\u0644\u062b\u0627\u0646\u0648\u064a\u0629<\/h2>\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" alt=\"Coordinated transformer primary and secondary protection\" loading=\"lazy\" src=\"https:\/\/lbajiele.com\/wp-content\/uploads\/2026\/08\/transformer-breaker-fuse-sizing.png\"\/><figcaption>\u0627\u0644\u062d\u0645\u0627\u064a\u0629 \u0627\u0644\u0623\u0633\u0627\u0633\u064a\u0629 \u0648\u0627\u0644\u062b\u0627\u0646\u0648\u064a\u0629 \u0644\u0644\u0645\u062d\u0648\u0644 \u0627\u0644\u0645\u0646\u0633\u0642\u0629.<\/figcaption><\/figure>\n<p>\u062a\u062d\u0645\u0644 \u0648\u062d\u062f\u0629 \u062b\u0644\u0627\u062b\u064a\u0629 \u0627\u0644\u0637\u0648\u0631 \u0628\u0642\u062f\u0631\u0629 480 \u0625\u0644\u0649 208 \u0641\u0648\u0644\u062a \u0648\u0627\u064a\/120 \u0641\u0648\u0644\u062a \u062d\u0648\u0627\u0644\u064a 90 \u0623\u0645\u0628\u064a\u0631 \u0639\u0644\u0649 \u062c\u0627\u0646\u0628 480 \u0641\u0648\u0644\u062a \u0648208 \u0623\u0645\u0628\u064a\u0631 \u0639\u0644\u0649 \u062c\u0627\u0646\u0628 208 \u0641\u0648\u0644\u062a \u0639\u0646\u062f 75 \u0643\u0627\u0641\u0627 (kVA). \u064a\u0639\u0645\u0644 \u0627\u0644\u0645\u062d\u0648\u0644 \u0639\u0644\u0649 \u062a\u063a\u064a\u064a\u0631 \u0639\u0644\u0627\u0642\u0629 \u0627\u0644\u062c\u0647\u062f \u0628\u0627\u0644\u062a\u064a\u0627\u0631 \u0628\u064a\u0646\u0645\u0627 \u062a\u0638\u0644 \u0627\u0644\u0642\u062f\u0631\u0629 \u0627\u0644\u0638\u0627\u0647\u0631\u064a\u0629 \u062b\u0627\u0628\u062a\u0629 \u062a\u0642\u0631\u064a\u0628\u0627\u064b\u060c \u0628\u0627\u0633\u062a\u062b\u0646\u0627\u0621 \u0627\u0644\u0641\u0642\u062f. \u0648\u0646\u062a\u064a\u062c\u0629 \u0644\u0630\u0644\u0643\u060c \u062a\u062d\u062a\u0627\u062c \u0645\u0648\u0635\u0644\u0627\u062a \u0627\u0644\u062c\u0627\u0646\u0628 \u0627\u0644\u0627\u0628\u062a\u062f\u0627\u0626\u064a \u0648\u0627\u0644\u062b\u0627\u0646\u0648\u064a \u0625\u0644\u0649 \u0633\u0639\u0627\u062a \u0645\u062e\u062a\u0644\u0641\u0629 \u0644\u062a\u064a\u0627\u0631 \u0627\u0644\u0623\u0645\u0628\u064a\u0631 \u0648\u062d\u0645\u0627\u064a\u0629 \u0645\u062e\u062a\u0644\u0641\u0629.<\/p>\n<h2>\u062d\u062c\u0645 \u0642\u0627\u0637\u0639 \u0627\u0644\u062f\u0627\u0626\u0631\u0629 \u0648\u0627\u0644\u0645\u0648\u0635\u0644<\/h2>\n<p>\u0644\u0627 \u062a\u0642\u0645 \u0628\u0627\u062e\u062a\u064a\u0627\u0631 \u0642\u0648\u0627\u0637\u0639 \u0627\u0644\u062f\u0627\u0626\u0631\u0629 \u0628\u0646\u0627\u0621\u064b \u0639\u0644\u0649 \u0631\u0642\u0645 \u0627\u0644\u062d\u0645\u0644 \u0627\u0644\u0643\u0627\u0645\u0644 \u0648\u062d\u062f\u0647. \u062a\u0633\u0645\u062d \u0627\u0644\u0643\u0648\u062f\u0627\u062a \u0623\u0648 \u062a\u0641\u0631\u0636 \u062a\u0631\u062a\u064a\u0628\u0627\u062a \u062d\u0645\u0627\u064a\u0629 \u0645\u062d\u062f\u062f\u0629 \u062a\u0639\u062a\u0645\u062f \u0639\u0644\u0649 \u0627\u0644\u062c\u0627\u0646\u0628 \u0627\u0644\u0623\u0633\u0627\u0633\u064a \u0641\u0642\u0637 \u0623\u0648 \u0639\u0644\u0649 \u0627\u0644\u062c\u0627\u0646\u0628\u064a\u0646 \u0627\u0644\u0623\u0633\u0627\u0633\u064a \u0648\u0627\u0644\u062b\u0627\u0646\u0648\u064a \u0645\u0639\u0627\u064b\u060c \u0648\u062a\u0623\u062e\u0630 \u0641\u064a \u0627\u0644\u0627\u0639\u062a\u0628\u0627\u0631 \u062a\u064a\u0627\u0631 \u0627\u0644\u062a\u062f\u0641\u0642 \u0627\u0644\u0645\u0641\u0627\u062c\u0626. \u064a\u062c\u0628 \u0641\u062d\u0635 \u0627\u0644\u0645\u0648\u0635\u0644\u0627\u062a \u0645\u0646 \u062d\u064a\u062b \u0627\u0644\u062a\u062d\u0645\u064a\u0644 \u0627\u0644\u0645\u0633\u062a\u0645\u0631\u060c \u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u0639\u0632\u0644\u060c \u062a\u0635\u0646\u064a\u0641\u0627\u062a \u0627\u0644\u0623\u0637\u0631\u0627\u0641\u060c \u062a\u0635\u062d\u064a\u062d \u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u0645\u062d\u064a\u0637\u060c \u0627\u0644\u062a\u062c\u0645\u064a\u0639\u060c \u0648\u0647\u0628\u0648\u0637 \u0627\u0644\u062c\u0647\u062f. \u064a\u0646\u0628\u063a\u064a \u0639\u0644\u0649 \u0645\u0635\u0645\u0645 \u0645\u0624\u0647\u0644 \u062a\u0646\u0633\u064a\u0642 \u0627\u0644\u0623\u062c\u0647\u0632\u0629 \u0627\u0644\u0648\u0627\u0642\u0639\u0629 \u0641\u064a \u0627\u0644\u062c\u0647\u0629 \u0627\u0644\u0645\u0646\u0628\u0639\u064a\u0629 \u0648\u0627\u0644\u0645\u0635\u0628\u064a\u0629.<\/p>\n<h2>\u0647\u0644 \u0642\u062f\u0631\u0629 75 \u0643\u064a\u0644\u0648 \u0641\u0648\u0644\u062a \u0623\u0645\u0628\u064a\u0631 \u0643\u0628\u064a\u0631\u0629 \u0628\u0645\u0627 \u064a\u0643\u0641\u064a\u061f<\/h2>\n<p>\u0623\u0636\u0641 \u0627\u0644\u062d\u0645\u0644 \u0628\u0627\u0644\u0643\u064a\u0644\u0648\u0641\u0648\u0644\u062a \u0623\u0645\u0628\u064a\u0631 (kVA) \u0628\u062f\u0644\u0627\u064b \u0645\u0646 \u0645\u062c\u0631\u062f \u0625\u0636\u0627\u0641\u0629 \u0627\u0644\u0623\u0645\u0628\u064a\u0631\u0627\u062a \u0639\u0628\u0631 \u0627\u0644\u0641\u0648\u0644\u062a\u064a\u0627\u062a \u0627\u0644\u0645\u062e\u062a\u0644\u0641\u0629. \u0636\u0639 \u0641\u064a \u0627\u0639\u062a\u0628\u0627\u0631\u0643 \u0627\u0644\u0637\u0644\u0628\u060c \u0648\u0628\u062f\u0621 \u062a\u0634\u063a\u064a\u0644 \u0627\u0644\u0645\u062d\u0631\u0643\u0627\u062a\u060c \u0648\u0627\u0644\u062a\u0648\u0627\u0641\u0642\u064a\u0629 \u063a\u064a\u0631 \u0627\u0644\u062e\u0637\u064a\u0629\u060c \u0648\u0627\u0644\u062a\u0648\u0633\u0639 \u0627\u0644\u0645\u0633\u062a\u0642\u0628\u0644\u064a\u060c \u0648\u062f\u0631\u062c\u0629 \u0627\u0644\u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u0645\u062d\u064a\u0637\u0629\u060c \u0648\u062a\u0646\u0638\u064a\u0645 \u0627\u0644\u062c\u0647\u062f \u0627\u0644\u0645\u0642\u0628\u0648\u0644. \u0627\u0644\u0648\u062d\u062f\u0629 \u0627\u0644\u062a\u064a \u062a\u0643\u0648\u0646 \u0645\u0646\u0627\u0633\u0628\u0629 \u0644\u0644\u062d\u0645\u0644 \u0627\u0644\u062b\u0627\u0628\u062a \u0642\u062f \u062a\u0646\u062a\u062c \u0647\u0628\u0648\u0637\u0627\u064b \u0645\u0641\u0631\u0637\u0627\u064b \u0641\u064a \u0627\u0644\u062c\u0647\u062f \u0623\u062b\u0646\u0627\u0621 \u062a\u0633\u0627\u0631\u0639 \u0627\u0644\u0645\u062d\u0631\u0643 \u0623\u0648 \u062a\u0633\u062e\u0646 \u0628\u0634\u062f\u0629 \u0645\u0639 \u0627\u0644\u062a\u064a\u0627\u0631 \u0627\u0644\u063a\u0646\u064a \u0628\u0627\u0644\u062a\u0648\u0627\u0641\u0642\u064a\u0627\u062a.<\/p>\n<h2>\u0641\u062d\u0635 \u0644\u0648\u062d\u0629 \u0627\u0644\u0628\u064a\u0627\u0646\u0627\u062a \u0648\u0627\u0644\u0645\u0634\u062a\u0631\u064a\u0627\u062a<\/h2>\n<p>\u062a\u0623\u0643\u064a\u062f \u0627\u0644\u0641\u0648\u0644\u062a\u064a\u0629 \u0627\u0644\u0623\u0633\u0627\u0633\u064a\u0629 \u0648\u0627\u0644\u062b\u0627\u0646\u0648\u064a\u0629\u060c \u0648\u0627\u0644\u0648\u062c\u0647 (\u0627\u0644\u0623\u0637\u0648\u0627\u0631)\u060c \u0648\u0627\u0644\u062a\u0631\u062f\u062f\u060c \u0648\u0645\u062c\u0645\u0648\u0639\u0629 \u0627\u0644\u062a\u0648\u0635\u064a\u0644 \u0623\u0648 \u0631\u0628\u0637 \u0627\u0644\u0645\u0644\u0641\u0627\u062a\u060c \u0648\u0627\u0644\u0645\u0642\u0627\u0628\u0633 (\u0627\u0644\u0645\u0628\u062f\u062f\u0627\u062a)\u060c \u0648\u0627\u0644\u0645\u0639\u0627\u0648\u0642\u0629\u060c \u0648\u0641\u0626\u0629 \u0627\u0644\u0639\u0632\u0644\u060c \u0648\u0627\u0631\u062a\u0641\u0627\u0639 \u062f\u0631\u062c\u0627\u062a \u0627\u0644\u062d\u0631\u0627\u0631\u0629\u060c \u0648\u0627\u0644\u063a\u0644\u0627\u0641\u060c \u0648\u0627\u0644\u0643\u0641\u0627\u0621\u0629\u060c \u0648\u0645\u0633\u062a\u0648\u0649 \u0627\u0644\u0636\u0648\u0636\u0627\u0621\u060c \u0648\u0627\u0644\u0645\u0644\u062d\u0642\u0627\u062a. \u0623\u0645\u0627 \u0628\u0627\u0644\u0646\u0633\u0628\u0629 \u0644\u0639\u0645\u0644\u064a\u0627\u062a \u0627\u0644\u062a\u062d\u062f\u064a\u062b\u060c \u0641\u064a\u062c\u0628 \u0627\u0644\u062a\u062d\u0642\u0642 \u0645\u0646 \u0627\u0644\u0623\u0628\u0639\u0627\u062f (\u0627\u0644\u0645\u0633\u0627\u062d\u0629 \u0627\u0644\u0623\u0633\u0627\u0633\u064a\u0629)\u060c \u0648\u0645\u062f\u062e\u0644 \u0627\u0644\u0643\u0627\u0628\u0644\u0627\u062a\u060c \u0648\u062a\u0631\u062a\u064a\u0628 \u0627\u0644\u0623\u0637\u0631\u0627\u0641\u060c \u0648\u062a\u064a\u0627\u0631 \u0627\u0644\u0639\u0637\u0644 \u0627\u0644\u0645\u062a\u0627\u062d\u060c \u0648\u062d\u0645\u0627\u064a\u0629 \u0627\u0644\u062a\u064a\u0627\u0631 \u0627\u0644\u0639\u0644\u0648\u064a \u0642\u0628\u0644 \u0625\u062a\u0645\u0627\u0645 \u0627\u0644\u0637\u0644\u0628.<\/p>\n<section class=\"lbaji-gsc-update\">\n<h2>75 kVA Full-Load Amps by Voltage and Phase<\/h2>\n<p>The table below uses a 75,000 VA nameplate rating. For three-phase rows, voltage means line-to-line voltage and current means line current. Single-phase rows use the voltage across the winding. Values are rounded to one decimal ampere; the design calculation should use the actual nameplate voltage and the project electrical drawings.<\/p>\n<figure class=\"wp-block-table is-style-stripes\" style=\"overflow-x:auto;max-width:100%\">\n<table>\n<thead>\n<tr>\n<th scope=\"col\">System voltage<\/th>\n<th scope=\"col\">Single-phase full-load current<\/th>\n<th scope=\"col\">Three-phase full-load line current<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u0662\u0660\u0668 \u0641\u0648\u0644\u0637<\/td>\n<td>360.6 A<\/td>\n<td>208.2 A<\/td>\n<\/tr>\n<tr>\n<td>\u0662\u0663\u0660 \u0641\u0648\u0644\u062a<\/td>\n<td>326.1 A<\/td>\n<td>188.3 A<\/td>\n<\/tr>\n<tr>\n<td>\u0662\u0664\u0660 \u0641\u0648\u0644\u062a<\/td>\n<td>312.5 \u0623\u0645\u0628\u064a\u0631<\/td>\n<td>180.4 \u0623<\/td>\n<\/tr>\n<tr>\n<td>\u0664\u0660\u0660 \u0641\u0648\u0644\u062a<\/td>\n<td>187.5 \u0623\u0645\u0628\u064a\u0631<\/td>\n<td>\u0661\u0660\u0668.\u0663 \u0623<\/td>\n<\/tr>\n<tr>\n<td>\u0664\u0661\u0665 \u0641\u0648\u0644\u062a<\/td>\n<td>180.7 A<\/td>\n<td>104.3 A<\/td>\n<\/tr>\n<tr>\n<td>480 \u0641\u0648\u0644\u062a<\/td>\n<td>156.3 A<\/td>\n<td>90.2 \u0623<\/td>\n<\/tr>\n<tr>\n<td>600 V<\/td>\n<td>\u0661\u0662\u0665.\u0660 \u0623\ufee3\ufe92\ufef4\ufeae<\/td>\n<td>72.2 A<\/td>\n<\/tr>\n<\/tbody>\n<\/table><figcaption>Calculated from I = 75,000\/V for single phase and I = 75,000\/(\u221a3 \u00d7 V) for balanced three phase. Formula basis: <a href=\"https:\/\/www.se.com\/us\/en\/faqs\/FA101694\/\" target=\"_blank\" rel=\"noopener nofollow\">Schneider Electric transformer capacity FAQ<\/a> \u0648 <a href=\"https:\/\/www.electrical-installation.org\/enwiki\/Choice_of_transformer_rating\" target=\"_blank\" rel=\"noopener nofollow\">Electrical Installation Guide<\/a>.<\/figcaption><\/figure>\n<p>This table is a current lookup, not a promise that every 75 kVA transformer is available in every listed voltage or connection. Confirm the actual primary and secondary nameplate ratings, winding connection, frequency, taps and cooling designation. Never use a 400 V row for a 480 V winding simply because both are described as industrial three-phase systems.<\/p>\n<h2>Worked Example: 480 V Primary to 208Y\/120 V Secondary<\/h2>\n<p>Consider a balanced 75 kVA, three-phase step-down transformer with a 480 V line-to-line primary and a 208Y\/120 V secondary. On the primary, the theoretical full-load line current is 75,000 \u00f7 (\u221a3 \u00d7 480) = 90.2 A. On the secondary, it is 75,000 \u00f7 (\u221a3 \u00d7 208) = 208.2 A. The 120 V marking identifies line-to-neutral voltage on the wye secondary. For the three-phase calculation, use 208 V line-to-line, not 120 V.<\/p>\n<p>The higher secondary current is expected: voltage falls while apparent power remains approximately the same, allowing for real transformer losses. When reviewing a one-line diagram, calculate each side separately. Check the transformer nameplate before ordering a breaker or cable; current alone does not establish conductor ampacity, breaker setting or short-circuit duty.<\/p>\n<h2>How Many kW Can a 75 kVA Transformer Supply?<\/h2>\n<p>kVA measures apparent power; kW measures real power. For a balanced load, estimated real power is kW = 75 \u00d7 power factor. At 0.8 power factor, that is 60 kW. At 0.9 power factor, it is 67.5 kW. At unity power factor, the mathematical maximum is 75 kW. These figures do not replace a load study: harmonics, motor starting, duty cycle, ambient temperature and the transformer&#8217;s actual thermal rating still matter.<\/p>\n<p>Do not apply an automatic \u201c80% of 75 kVA\u201d rule to every transformer. A continuous-load rule for a particular protective device or installation is not the same as the transformer&#8217;s nameplate thermal capacity. Ask the electrical designer to document the applicable code, manufacturer instructions, load profile and required spare capacity.<\/p>\n<h2>When 75 kVA Is Too Small<\/h2>\n<p>Compare the highest expected coincident demand in kVA with the transformer&#8217;s rating under the actual operating conditions. If several loads start at different times, a simple sum of every nameplate rating may overstate demand. If large motors start together, steady-state current can understate the short-duration voltage dip. Record both cases rather than treating a single amperage number as the entire sizing decision.<\/p>\n<p>For example, a balanced 480 V three-phase load drawing 100 A represents approximately \u221a3 \u00d7 480 \u00d7 100 \u00f7 1,000 = 83.1 kVA before any allowance for expansion. That exceeds 75 kVA. Conversely, a 60 A load at the same voltage represents about 49.9 kVA, leaving apparent-power headroom, subject to starting current, thermal conditions and other connected loads. Schneider Electric&#8217;s <a href=\"https:\/\/www.se.com\/us\/en\/faqs\/FA101694\/\" target=\"_blank\" rel=\"noopener nofollow\">capacity guidance<\/a> explicitly notes that motor and specialty loads may require more than the simple arithmetic result.<\/p>\n<h2>What to Send With a 75 kVA Transformer Inquiry<\/h2>\n<p>Give the supplier the primary and secondary voltage, phase, frequency, connection, installation site, required enclosure, ambient conditions and available fault current. Include the load schedule, motor-starting information, harmonic-producing equipment and space limits. Ask for a data sheet showing nameplate ratings, impedance, losses, temperature rise, dimensions and routine test documents. If replacing a unit, provide photos of the existing nameplate and terminal layout, not only the phrase \u201c75 kVA transformer.\u201d<\/p>\n<p>For adjacent calculations, use our <a href=\"https:\/\/lbajiele.com\/ar\/blog\/how-much-load-can-a-63-kva-transformer-handle\/\">63 kVA load-capacity example<\/a>, <a href=\"https:\/\/lbajiele.com\/ar\/blog\/amps-convert-to-kva-calculator-and-formula-guide\/\">amps-to-kVA formula guide<\/a> \u0648 <a href=\"https:\/\/lbajiele.com\/ar\/blog\/%d8%af%d9%84%d9%8a%d9%84-%d8%b5%d9%87%d8%b1%d8%a7%d8%aa-%d8%a7%d9%84%d9%85%d8%ad%d9%88%d9%84%d8%a7%d8%aa\/\">\u062f\u0644\u064a\u0644 \u0635\u0647\u0631\u0627\u062a \u0627\u0644\u0645\u062d\u0648\u0644\u0627\u062a<\/a>. Review the <a href=\"https:\/\/lbajiele.com\/ar\/product-category\/transformer\/\">\u0645\u062c\u0645\u0648\u0639\u0629 \u0645\u0646\u062a\u062c\u0627\u062a \u0627\u0644\u0645\u062d\u0648\u0644\u0627\u062a<\/a> for available configurations; confirm project-specific values with the manufacturer.<\/p>\n<h2>Three-Phase Transformer Video Lesson<\/h2>\n<p>For the relationship between phase voltage, line voltage and transformer connections, this NPTEL university lecture provides a useful technical introduction. The calculation table above remains the direct answer for 75 kVA current.<\/p>\n<div class=\"lbaji-video\" style=\"position:relative;padding-bottom:56.25%;height:0;overflow:hidden\"><iframe src=\"https:\/\/www.youtube-nocookie.com\/embed\/s86tXyDQIxg\" title=\"NPTEL Introduction to Three Phase Transformer\" loading=\"lazy\" allow=\"accelerometer; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0\"><\/iframe><\/div>\n<p><a href=\"https:\/\/www.youtube.com\/watch?v=s86tXyDQIxg\" target=\"_blank\" rel=\"noopener nofollow\">Watch NPTEL&#8217;s Introduction to Three Phase Transformer on YouTube<\/a>.<\/p>\n<\/section>\n<h2>\u0627\u0644\u0645\u0639\u062f\u0627\u062a \u0630\u0627\u062a \u0627\u0644\u0635\u0644\u0629 \u0628\u0640 LBAJI<\/h2>\n<p>\u0631\u0627\u062c\u0639 \u0645\u0627 \u0630\u064f\u0643\u0631 <a href=\"https:\/\/lbajiele.com\/ar\/product-category\/transformer\/\">\u0645\u062c\u0645\u0648\u0639\u0629 \u0645\u0646\u062a\u062c\u0627\u062a LBAJI<\/a> \u0648\u0627\u0644\u062f\u0627\u0639\u0645\u0629 <a href=\"https:\/\/lbajiele.com\/ar\/blog\/complete-guide-to-transformer-capacity-size-dimensions\/\">\u062f\u0644\u064a\u0644 \u0631\u0643\u0627\u0626\u0632 \u0633\u0639\u0629 \u0627\u0644\u062d\u062c\u0645 \u0648\u0623\u0628\u0639\u0627\u062f \u0627\u0644\u0645\u062d\u0648\u0644\u0627\u062a<\/a>. \u0623\u0631\u0633\u0644 \u0627\u0644\u0645\u062e\u0637\u0637 \u0627\u0644\u0623\u062d\u0627\u062f\u064a\u060c \u0648\u0627\u0644\u0642\u062f\u0631\u0627\u062a\u060c \u0648\u0627\u0644\u0643\u0645\u064a\u0629\u060c \u0648\u0627\u0644\u0628\u064a\u0626\u0629 \u0644\u0644\u062a\u0643\u0648\u064a\u0646 \u0627\u0644\u062e\u0627\u0635 \u0628\u0627\u0644\u0645\u0634\u0631\u0648\u0639.<\/p>\n<section class=\"lbaji-visible-faq\" aria-label=\"\u0627\u0644\u0623\u0633\u0626\u0644\u0629 \u0627\u0644\u0634\u0627\u0626\u0639\u0629\">\n<h2>\u0627\u0644\u0623\u0633\u0626\u0644\u0629 \u0627\u0644\u0634\u0627\u0626\u0639\u0629<\/h2>\n<div class=\"rank-math-list-item\" id=\"faq-question-1\">\n<h3 class=\"rank-math-question\">How many amps is a 75 kVA transformer at 480 V three phase?<\/h3>\n<div class=\"rank-math-answer\">\n<p>Approximately 90.2 A at full load, calculated as 75,000 divided by 1.732 times 480.<\/p>\n<\/div>\n<\/div>\n<div class=\"rank-math-list-item\" id=\"faq-question-2\">\n<h3 class=\"rank-math-question\">How many amps is 75 kVA at 208 V three phase?<\/h3>\n<div class=\"rank-math-answer\">\n<p>Approximately 208.2 A at full load.<\/p>\n<\/div>\n<\/div>\n<div class=\"rank-math-list-item\" id=\"faq-question-3\">\n<h3 class=\"rank-math-question\">Is kVA the same as kW?<\/h3>\n<div class=\"rank-math-answer\">\n<p>No. kVA is apparent power; kW is real power and equals kVA multiplied by power factor for a balanced load.<\/p>\n<\/div>\n<\/div>\n<div class=\"rank-math-list-item\" id=\"faq-question-4\">\n<h3 class=\"rank-math-question\">Can I size the breaker exactly at full-load current?<\/h3>\n<div class=\"rank-math-answer\">\n<p>Not automatically. Transformer inrush and electrical-code protection rules must be applied.<\/p>\n<\/div>\n<\/div>\n<div class=\"rank-math-list-item\" id=\"faq-question-5\">\n<h3 class=\"rank-math-question\">Why are secondary amps higher than primary amps?<\/h3>\n<div class=\"rank-math-answer\">\n<p>A step-down transformer reduces voltage, so current rises for approximately the same apparent power.<\/p>\n<\/div>\n<\/div>\n<\/section>\n<section class=\"lbaji-decision-aid\">\n<h2>\u0633\u064a\u0631 \u0639\u0645\u0644 \u0627\u0644\u062a\u0642\u064a\u064a\u0645 \u0627\u0644\u0639\u0645\u0644\u064a<\/h2>\n<p>\u0628\u0627\u0644\u0646\u0633\u0628\u0629 \u0644\u0623\u0645\u0628\u064a\u0631\u0627\u062a \u0645\u062d\u0648\u0644 \u0628\u0642\u062f\u0631\u0629 75 \u0643\u064a\u0644\u0648 \u0641\u0648\u0644\u062a \u0623\u0645\u0628\u064a\u0631\u060c \u0627\u0633\u062a\u062e\u062f\u0645 \u0633\u064a\u0631 \u0639\u0645\u0644 \u0645\u0648\u062b\u0642\u0627\u064b \u0628\u062f\u0644\u0627\u064b \u0645\u0646 \u0627\u0644\u0627\u062e\u062a\u064a\u0627\u0631 \u0628\u0646\u0627\u0621\u064b \u0639\u0644\u0649 \u0627\u0644\u0643\u062a\u0627\u0644\u0648\u062c \u0641\u0642\u0637. \u0623\u0648\u0644\u0627\u064b\u060c \u0642\u0645 \u0628\u062a\u062b\u0628\u064a\u062a \u0645\u062f\u062e\u0644\u0627\u062a \u0627\u0644\u0646\u0638\u0627\u0645 \u062d\u062f\u0648\u062f \u0627\u0644\u062a\u0634\u063a\u064a\u0644. \u0628\u0639\u062f \u0630\u0644\u0643\u060c \u0642\u0627\u0631\u0646 \u062e\u064a\u0627\u0631\u0627\u062a \u0627\u0644\u0625\u0646\u0634\u0627\u0621 \u0623\u0648 \u0627\u0644\u062e\u062f\u0645\u0629 \u0627\u0644\u0645\u062a\u0627\u062d\u0629 \u0628\u0627\u0644\u0628\u064a\u0626\u0629 \u0627\u0644\u0641\u0639\u0644\u064a\u0629. \u062b\u0645 \u062a\u062d\u0642\u0642 \u0645\u0646 \u0627\u0644\u062d\u0633\u0627\u0628\u0627\u062a\u060c \u0648\u0648\u0627\u062c\u0647\u0627\u062a \u0627\u0644\u062d\u0645\u0627\u064a\u0629\u060c \u0648\u0627\u062e\u062a\u0628\u0627\u0631\u0627\u062a \u0627\u0644\u0642\u0628\u0648\u0644. \u0623\u062e\u064a\u0631\u0627\u064b\u060c \u0642\u0645 \u0628\u062a\u0633\u062c\u064a\u0644 \u0627\u0644\u0627\u0646\u062d\u0631\u0627\u0641\u0627\u062a \u0627\u0644\u0645\u0639\u062a\u0645\u062f\u0629 \u0648\u0627\u062d\u062a\u0641\u0638 \u0628\u0627\u0644\u0646\u062a\u0627\u0626\u062c \u0627\u0644\u0623\u0633\u0627\u0633\u064a\u0629 \u0644\u0623\u063a\u0631\u0627\u0636 \u0627\u0644\u062a\u0634\u063a\u064a\u0644 \u0648\u0627\u0644\u0635\u064a\u0627\u0646\u0629.<\/p>\n<ol>\n<li>\u0645\u0631\u0627\u062c\u0639\u0629 \u062a\u064a\u0627\u0631\u0627\u062a \u0627\u0644\u062d\u0645\u0644 \u0627\u0644\u0643\u0627\u0645\u0644 \u0627\u0644\u0634\u0627\u0626\u0639\u0629 \u0644\u0640 75 \u0643\u064a\u0644\u0648 \u0641\u0648\u0644\u062a \u0623\u0645\u0628\u064a\u0631 \u0648\u062a\u0633\u062c\u064a\u0644 \u0627\u0644\u0642\u0631\u0627\u0631 \u0627\u0644\u062e\u0627\u0635 \u0628\u0627\u0644\u0645\u0634\u0631\u0648\u0639.<\/li>\n<li>\u0645\u0631\u0627\u062c\u0639\u0629 \u0627\u0644\u0645\u0636\u062e\u0645\u0627\u062a \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u0629 \u0648\u0627\u0644\u062b\u0627\u0646\u0648\u064a\u0629 \u0648\u062a\u0633\u062c\u064a\u0644 \u0627\u0644\u0642\u0631\u0627\u0631 \u0627\u0644\u062e\u0627\u0635 \u0628\u0627\u0644\u0645\u0634\u0631\u0648\u0639.<\/li>\n<li>\u0645\u0631\u0627\u062c\u0639\u0629 \u0642\u064a\u0627\u0633\u0627\u062a \u0642\u0648\u0627\u0637\u0639 \u0627\u0644\u062f\u0648\u0627\u0626\u0631 \u0648\u0627\u0644\u0645\u0648\u0635\u0644\u0627\u062a \u0648\u062a\u062f\u0648\u064a\u0646 \u0627\u0644\u0642\u0631\u0627\u0631 \u0627\u0644\u062e\u0627\u0635 \u0628\u0627\u0644\u0645\u0634\u0631\u0648\u0639.<\/li>\n<li>\u0645\u0631\u0627\u062c\u0639\u0629: \u0647\u0644 75 \u0643\u064a\u0644\u0648 \u0641\u0648\u0644\u062a \u0623\u0645\u0628\u064a\u0631 \u0643\u0628\u064a\u0631 \u0628\u0627\u0644\u0642\u062f\u0631 \u0627\u0644\u0643\u0627\u0641\u064a\u061f \u0648\u062a\u0633\u062c\u064a\u0644 \u0627\u0644\u0642\u0631\u0627\u0631 \u0627\u0644\u062e\u0627\u0635 \u0628\u0627\u0644\u0645\u0634\u0631\u0648\u0639.<\/li>\n<\/ol>\n<\/section>\n<section class=\"lbaji-acceptance-records\">\n<h2>\u0633\u062c\u0644\u0627\u062a \u0627\u0644\u0642\u0628\u0648\u0644 \u0627\u0644\u0645\u0631\u0627\u062f \u0627\u0644\u0627\u062d\u062a\u0641\u0627\u0638 \u0628\u0647\u0627<\/h2>\n<p>\u0627\u0644\u0627\u062d\u062a\u0641\u0627\u0638 \u0628\u0635\u062d\u064a\u0641\u0629 \u0627\u0644\u0628\u064a\u0627\u0646\u0627\u062a \u0627\u0644\u0645\u0639\u062a\u0645\u062f\u0629\u060c \u0648\u0627\u0644\u0631\u0633\u0648\u0645\u0627\u062a\u060c \u0648\u0642\u0627\u0626\u0645\u0629 \u0627\u0644\u0627\u0646\u062d\u0631\u0627\u0641\u0627\u062a\u060c \u0648\u0634\u0647\u0627\u062f\u0627\u062a \u0627\u0644\u0645\u0648\u0627\u062f \u0639\u0646\u062f \u0627\u0644\u0627\u0642\u062a\u0636\u0627\u0621\u060c \u0648\u062a\u0642\u0627\u0631\u064a\u0631 \u0627\u0644\u0627\u062e\u062a\u0628\u0627\u0631\u0627\u062a \u0627\u0644\u0631\u0648\u062a\u064a\u0646\u064a\u0629 \u0648\u0627\u0644\u062e\u0627\u0635\u0629\u060c \u0648\u0625\u0639\u062f\u0627\u062f\u0627\u062a \u0627\u0644\u062d\u0645\u0627\u064a\u0629\u060c \u0648\u0646\u062a\u0627\u0626\u062c \u0627\u0644\u062a\u0634\u063a\u064a\u0644 \u0627\u0644\u062a\u062c\u0631\u064a\u0628\u064a\u060c \u0648\u0627\u0644\u0635\u0648\u0631 \u0627\u0644\u0641\u0648\u062a\u0648\u063a\u0631\u0627\u0641\u064a\u0629\u060c \u0648\u062a\u0641\u0627\u0635\u064a\u0644 \u0644\u0648\u062d\u0629 \u0627\u0644\u0627\u0633\u0645 \u0627\u0644\u0646\u0647\u0627\u0626\u064a\u0629. \u062a\u0633\u062c\u064a\u0644 \u0638\u0631\u0648\u0641 \u0627\u0644\u0627\u062e\u062a\u0628\u0627\u0631 \u0628\u0627\u0644\u0625\u0636\u0627\u0641\u0629 \u0625\u0644\u0649 \u0627\u0644\u0642\u064a\u0645\u060c \u0644\u0623\u0646 \u062f\u0631\u062c\u0629 \u0627\u0644\u062d\u0631\u0627\u0631\u0629 \u0648\u0637\u0631\u064a\u0642\u0629 \u0627\u0644\u062c\u0647\u0627\u0632 \u0648\u0627\u0644\u062a\u0648\u0635\u064a\u0644 \u064a\u0645\u0643\u0646 \u0623\u0646 \u062a\u0624\u062b\u0631 \u0639\u0644\u0649 \u0627\u0644\u0645\u0642\u0627\u0631\u0646\u0629. \u062a\u0646\u0634\u0626 \u0647\u0630\u0647 \u0627\u0644\u0645\u0633\u062a\u0646\u062f\u0627\u062a \u0627\u0644\u0623\u0633\u0627\u0633 \u0627\u0644\u0645\u0633\u062a\u062e\u062f\u0645 \u0644\u0644\u062a\u062d\u0642\u064a\u0642 \u0641\u064a \u0627\u0644\u0625\u0646\u0630\u0627\u0631\u0627\u062a \u0627\u0644\u0644\u0627\u062d\u0642\u0629\u060c \u0623\u0648 \u062a\u063a\u064a\u064a\u0631\u0627\u062a \u0627\u0644\u0623\u062d\u0645\u0627\u0644\u060c \u0623\u0648 \u0627\u0644\u062a\u062f\u0647\u0648\u0631. \u0643\u0645\u0627 \u0623\u0646\u0647\u0627 \u062a\u0645\u0646\u0639 \u0637\u0644\u0628 \u0645\u0639\u062f\u0627\u062a \u0628\u062f\u064a\u0644\u0629 \u0628\u0646\u0627\u0621\u064b \u0639\u0644\u0649 \u0648\u0635\u0641 \u063a\u064a\u0631 \u0645\u0643\u062a\u0645\u0644 \u0628\u0639\u062f \u062a\u063a\u064a\u0631 \u0627\u0644\u0623\u0641\u0631\u0627\u062f \u0623\u0648 \u0627\u0644\u0645\u0648\u0631\u062f\u064a\u0646.<\/p>\n<\/section>\n<section class=\"lbaji-technical-references\">\n<h2>\u0627\u0644\u0645\u0631\u0627\u062c\u0639 \u0627\u0644\u0641\u0646\u064a\u0629 \u0648\u0627\u0644\u0642\u0631\u0627\u0621\u0629 \u0627\u0644\u0625\u0636\u0627\u0641\u064a\u0629<\/h2>\n<ul>\n<li><a href=\"https:\/\/www.energy.gov\/cmei\/buildings\/distribution-transformers\" rel=\"noopener noreferrer nofollow\" target=\"_blank\">\u0645\u0648\u0627\u0631\u062f \u0645\u062d\u0648\u0644\u0627\u062a \u0627\u0644\u062a\u0648\u0632\u064a\u0639 \u0627\u0644\u062e\u0627\u0635\u0629 \u0628\u0648\u0632\u0627\u0631\u0629 \u0627\u0644\u0637\u0627\u0642\u0629 \u0627\u0644\u0623\u0645\u0631\u064a\u0643\u064a\u0629<\/a><\/li>\n<li><a href=\"https:\/\/webstore.iec.ch\/en\/publication\/588\" rel=\"noopener noreferrer nofollow\" target=\"_blank\">\u0645\u062d\u0648\u0644\u0627\u062a \u0627\u0644\u0642\u062f\u0631\u0629 IEC 60076-1<\/a><\/li>\n<li><a href=\"https:\/\/www.nfpa.org\/codes-and-standards\" rel=\"noopener noreferrer nofollow\" target=\"_blank\">\u0627\u0644\u0631\u0645\u0648\u0632 \u0648\u0645\u0639\u0627\u064a\u064a\u0631 \u0627\u0644\u0643\u0647\u0631\u0628\u0627\u0621 \u0627\u0644\u062a\u0627\u0628\u0639\u0629 \u0644\u0644\u062c\u0645\u0639\u064a\u0629 \u0627\u0644\u0648\u0637\u0646\u064a\u0629 \u0644\u0644\u0648\u0642\u0627\u064a\u0629 \u0645\u0646 \u0627\u0644\u062d\u0631\u0627\u0626\u0642 (NFPA)<\/a><\/li>\n<\/ul>\n<\/section>\n<h2>\u062e\u0627\u062a\u0645\u0629<\/h2>\n<p>A 75 kVA transformer does not have one fixed amp rating. Current depends on phase and voltage: single-phase current is 75,000 \u00f7 V; three-phase line current is 75,000 \u00f7 (1.732 \u00d7 V). For example, 75 kVA is about 90.2 A at 480 V three-phase and 208.2 A at 208 V three-phase. Use project data and documented acceptance criteria before purchase, installation or service.<\/p>","protected":false},"excerpt":{"rendered":"<p>75 kVA transformer amps depend on voltage and phase. See single- and three-phase current charts, a 480-to-208 V example, and sizing checks.<\/p>","protected":false},"author":6,"featured_media":2721,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[52],"tags":[85,66,65],"class_list":["post-2722","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-transformers","tag-kva-calculations","tag-transformer-capacity","tag-transformer-sizing"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/lbajiele.com\/ar\/wp-json\/wp\/v2\/posts\/2722","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lbajiele.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lbajiele.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lbajiele.com\/ar\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/lbajiele.com\/ar\/wp-json\/wp\/v2\/comments?post=2722"}],"version-history":[{"count":6,"href":"https:\/\/lbajiele.com\/ar\/wp-json\/wp\/v2\/posts\/2722\/revisions"}],"predecessor-version":[{"id":4831,"href":"https:\/\/lbajiele.com\/ar\/wp-json\/wp\/v2\/posts\/2722\/revisions\/4831"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/lbajiele.com\/ar\/wp-json\/wp\/v2\/media\/2721"}],"wp:attachment":[{"href":"https:\/\/lbajiele.com\/ar\/wp-json\/wp\/v2\/media?parent=2722"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lbajiele.com\/ar\/wp-json\/wp\/v2\/categories?post=2722"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lbajiele.com\/ar\/wp-json\/wp\/v2\/tags?post=2722"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}