Question

Problem 2: A 60 Hz, 75 kVA, 13.5kV/240V, single-phase ideal transformer is used to step-down the voltage of a distribution system. If the low-voltage side of the transformer is to be kept at a constant magnitude of $|V_2| = 240 V_{rms}$, determine the following quantities: a) the value of the load impedance (connected to the low-voltage side) that will cause the transformer to be fully loaded; b) the value of the load impedance found in a) referred to the high-voltage side of the transformer; c) the value of the load current referred to the low-voltage side of the transformer; and d) the value of the load current referred to the high-voltage side of the transformer. Ans: a) $|Z_{FL,S}| = 0.768 \Omega$; b) $|Z_{FL,P}| = 2.430 k\Omega$; c) $|I_{LOAD,S}| = 312.5 A_{rms}$; d) $|I_{LOAD,P}| = 5.556 A_{rms}$.

          Problem 2:
A 60 Hz, 75 kVA, 13.5kV/240V, single-phase ideal transformer is used to step-down the voltage
of a distribution system. If the low-voltage side of the transformer is to be kept at a constant
magnitude of $|V_2| = 240 V_{rms}$, determine the following quantities: a) the value of the load
impedance (connected to the low-voltage side) that will cause the transformer to be fully loaded;
b) the value of the load impedance found in a) referred to the high-voltage side of the transformer;
c) the value of the load current referred to the low-voltage side of the transformer; and d) the value
of the load current referred to the high-voltage side of the transformer. Ans: a) $|Z_{FL,S}| = 0.768 \Omega$;
b) $|Z_{FL,P}| = 2.430 k\Omega$; c) $|I_{LOAD,S}| = 312.5 A_{rms}$; d) $|I_{LOAD,P}| = 5.556 A_{rms}$.

Problem 2:
A 60 Hz, 75 kVA, 13.5kV/240V, single-phase ideal transformer is used to step-down the voltage
of a distribution system. If the low-voltage side of the transformer is to be kept at a constant
magnitude of |V2| = 240 Vrms, determine the following quantities: a) the value of the load
impedance (connected to the low-voltage side) that will cause the transformer to be fully loaded;
b) the value of the load impedance found in a) referred to the high-voltage side of the transformer;
c) the value of the load current referred to the low-voltage side of the transformer; and d) the value
of the load current referred to the high-voltage side of the transformer. Ans: a) |ZFL,S| = 0.768 Ω;
b) |ZFL,P| = 2.430 kΩ; c) |ILOAD,S| = 312.5 Arms; d) |ILOAD,P| = 5.556 Arms.

Added by Stephanie R.

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