December 2012
Beginner
528 pages
17h 31m
English
Content preview from Introduction to Electrical Power and Power Electronics
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33AC Power Fundamentals
After transforming the entire system into an equivalent Y, and then combining
series–parallel impedances into one equivalent total impedance per phase, we can
easily determine the following:
Phasecurrent
Voltage per phase
Total impedance
=
pper phase
. (1.34)
Example 1.12
A balanced Δ-connected load-1 has Z
LL1
= 6 + j9 Ω in each phase of Δ. It is con-
nected in parallel with a balanced Y-connected load-2 with Z
LN2
= 2 + j3 Ω in each
phase of Y. If these two parallel loads are powered by a three-phase, Y-connected
generator with a 480-V line voltage, determine the line current at the generator
terminals and the real power del ...
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