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SECTION D RY- TP EI SBU ONA F M 1 Transformer Questions ...· PDF filea minimum circuit breaker trip rating and interrupting capacity for a 10 kVA single phase transformer with 4% impedance, to be operated from a 480 volt 60 Hz source. Calculate as follows: Normal Full Load Current = Nameplate Volt Amps = 10,000 VA = Line Volts 480 V 20.8 Amperes Maximum Short Circuit Amps = Full Load Amps 20.8 Amps

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