1. A 400 V rms Δ-connected source shown in Fig. 9.8-1 has I
1
10∠–30º A rms, I
2
10∠–120º and I
3
10√2∠105º A rms.
Find (i) the line currents delivered, (ii) the three-phase
active power and reactive power delivered and (iii) a
Δ-connected load that will result in this loading.
2. A star-connected source with zero source impedance delivers
V
RY
200∠–20º V rms, V
YB
210∠–130º V rms. The
R-phase phase voltage V
RN
is 115∠0º V rms. Find the third line
voltage and the remaining two phase voltages. Draw the phasor
diagram showing phase voltages and line voltages.
3. A Δ-connected voltage source with zero source impedance
delivers I
R
20∠–30º ...
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