A balanced load with ZR = ZB = ZY = ……<00 Ω was supplied a three phase 50 Hz, 100 V between line (balanced source). A fault on phase ‘B’ causes an open circuit, which unbalanced the load as shown in Figure 4. Similarly, a fault on the load of phase ‘Y’ cause a short-circuit, which unbalanced the load as shown in Figure 5. Using complex notation determine and analyse the individual phase currents and the neutral current in both figure.

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  1. A balanced load with ZR = ZB = ZY = ……<00 Ω was supplied a three phase 50 Hz, 100 V between line (balanced source). A fault on phase ‘B’ causes an open circuit, which unbalanced the load as shown in Figure 4. Similarly, a fault on the load of phase ‘Y’ cause a short-circuit, which unbalanced the load as shown in Figure 5. Using complex notation determine and analyse the individual phase currents and the neutral current in both figure.
R
20
B
Y
R
20
400V, 60Hz
B
IR
ZB = 55 < 0° 0
Figure 4: Star Unbalanced Load
IR
ZR
IB
ZY
ZR = 30 < 0° 0
Fault
Zy17 <0°02
A balanced load with ZR = ZB = Zy = ......<00 Q was supplied a three phase 50 Hz, 100 V
between line (balanced source). A fault on phase 'B' causes an open circuit, which unbalanced
the load as shown in Figure 4. Similarly, a fault on the load of phase 'Y' cause a short-circuit,
which unbalanced the load as shown in Figure 5. Using complex notation determine and
analyse the individual phase currents and the neutral current in both figure.
Transcribed Image Text:R 20 B Y R 20 400V, 60Hz B IR ZB = 55 < 0° 0 Figure 4: Star Unbalanced Load IR ZR IB ZY ZR = 30 < 0° 0 Fault Zy17 <0°02 A balanced load with ZR = ZB = Zy = ......<00 Q was supplied a three phase 50 Hz, 100 V between line (balanced source). A fault on phase 'B' causes an open circuit, which unbalanced the load as shown in Figure 4. Similarly, a fault on the load of phase 'Y' cause a short-circuit, which unbalanced the load as shown in Figure 5. Using complex notation determine and analyse the individual phase currents and the neutral current in both figure.
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