. A 10 kVA, single-phase, 2400-V:120-V, 60 Hz transformer has an equivalent impedance referred to LV side of 0.01 + j0.09 Ω. This transformer has a core loss of 100 W at rated voltage. When rated current is applied to the 2400-V winding, the exciting current in that winding is found to be 0.2 A. a. Find the full-load regulation of this transformer at a power factor of 0.8 lagging. b. Find the efficiency of this transformer at full load, 0.8 power factor lagging. c. If standard open-circuit and tests were performed on this transformer, what would be the measured values of these tests?

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1. A 10 kVA, single-phase, 2400-V:120-V, 60 Hz transformer has an equivalent impedance referred to
LV side of 0.01 + j0.09 Ω. This transformer has a core loss of 100 W at rated voltage. When rated
current is applied to the 2400-V winding, the exciting current in that winding is found to be 0.2 A.
a. Find the full-load regulation of this transformer at a power factor of 0.8 lagging.
b. Find the efficiency of this transformer at full load, 0.8 power factor lagging.
c. If standard open-circuit and tests were performed on this transformer, what would be the measured
values of these tests?

1. A 10 kVA, single-phase, 2400-V:120-V, 60 Hz transformer has an equivalent impedance referred to
LV side of 0.01 + j0.09 Q. This transformer has a core loss of 100 W at rated voltage. When rated
current is applied to the 2400-V winding, the exciting current in that winding is found to be 0.2 A.
a. Find the full-load regulation of this transformer at a power factor of 0.8 lagging.
b. Find the efficiency of this transformer at full load, 0.8 power factor lagging.
c. If standard open-circuit and tests were performed on this transformer, what would be the measured
values of these tests?
Transcribed Image Text:1. A 10 kVA, single-phase, 2400-V:120-V, 60 Hz transformer has an equivalent impedance referred to LV side of 0.01 + j0.09 Q. This transformer has a core loss of 100 W at rated voltage. When rated current is applied to the 2400-V winding, the exciting current in that winding is found to be 0.2 A. a. Find the full-load regulation of this transformer at a power factor of 0.8 lagging. b. Find the efficiency of this transformer at full load, 0.8 power factor lagging. c. If standard open-circuit and tests were performed on this transformer, what would be the measured values of these tests?
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