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Why do you rate a dc machine in watt but a transformer in kilo volt-ampere?
Wiki User
∙ 14y ago
The difference between watts and volt-amperes is due to the relative phase angle, or power factor, between voltage and current. In a DC system, the two are in phase. In an AC system, with only resistance, the two are also in phase. Add capacitance or inductance and the phase angle changes.
Wiki User
∙ 14y ago
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