A single-phase 50-kVA, 2400/240-volt, 60-Hz distribution transformer…

Question:

A single-phase 50-kVA, 2400/240-volt, 60-Hz distribution transformer is used as a step-down transformer at the load end of a 2400-volt feeder whose series impedance is (1.0 + j2.0) ohms. The equivalent series impedance of the transformer is (1.0 + j2.5) ohms. The equivalent series impedance of a transformer is (1.0 + j2.5) ohms referred to the high voltage (primary) side. The transformer is delivering rated load at a 0.8 power factor lagging and aft a rated secondary voltage. Neglecting the transformer exciting current, determine (a) the voltage at the transformer primary terminals, (b) the voltage at the sending end of the feeder, and (c) the real and reactive power delivered to the sending end of the feeder.

Answer:

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