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Each phase supplies 15 kVA. The primary has a line-to-neutral voltage of 277 v so the line current is 15,000 / 277 or 54 amps. The secondary has a line-to-neutral voltage of 120v so the current is 15,000/120 or 125 amps.

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9y ago
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13y ago

The current is 45 x 1000/600 = 75 amperes for a single phase transformer and 45 x 1000/1.73 x 600 = 43 amps for a three phase transformer.

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11y ago

The formula to use when KVA is shown. Amps = kva x 1000/1.73 x E = 45000/1.73 x 208 = 45000/359.84 = 125 amps.

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10y ago

To find the amperage when the kVA is known use the following equation. kVA x 1000/1.73 x Volts.

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12y ago

45 KVA = 45000 VA/480V/1.73= 54.190 Amp.

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13y ago

45000 / 380 = 118.42 amps

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Q: How many amps will a 45 KVA transformer produce at 480 volts?
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