
AC Power Fundamentals 31
Problem 1.11: A Δ-connected transformer has the line-to-line voltage phasor
V
˜
ab
= 480∠0. Determine the line-to-neutral voltage phasors V
˜
an
, V
˜
bn
, and
V
˜
cn
in magnitudes and phase angles with respect to V
˜
ab
.
Problem 1.12: A balanced Y-connected Load-1 has Z
LN1
= 4 + j 1 Ω in each
phase of Y. It is connected in parallel with a balanced Δ-connected Load-2
with Z
LL2
= 12 + j 6 Ω in each phase of Δ. If these two parallel loads are
powered by a 3-phase, Y-connected generator with 480 V line voltage,
determine the line current at the generator terminals and the real power
delivered by the generator.
Problem 1.13: Det ...