For the system shown by a single-line diagram (Fig. Q2), calculate the three-phase fault level (in MVA) and the short circuit current (in kA) for faults at the busbars A, B, C, D, and E. Assume that all loads do not contribute to system fault level. Feeder 어 T1 T2 X = 0.10 pu on 50 MVA 100 km. 25 MW, 0.8 pf lagging X = 0.5 Q/km. base for each line 60 MVA 40 MVA 11/132 kV 132/33 kV 5 MW, 0.9 pf lagging X = 11% X = 9%

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For the system shown by a single-line diagram (Fig. Q2), calculate the three-phase fault level (in MVA)
and the short circuit current (in kA) for faults at the busbars A, B, C, D, and E. Assume that all loads do
not contribute to system fault level.
E
Feeder
A
T2
3E
X = 0.10 pu
on 50 MVA
100 km.
X = 0.5 Q/km.
for each line
25 MW, 0.8 pf
lagging
base
60 MVA
40 MVA
11/132 kV
132/33 kV
5 MW, 0.9 pf
lagging
X = 11%
X = 9%
Fig. (Q2)
Transcribed Image Text:For the system shown by a single-line diagram (Fig. Q2), calculate the three-phase fault level (in MVA) and the short circuit current (in kA) for faults at the busbars A, B, C, D, and E. Assume that all loads do not contribute to system fault level. E Feeder A T2 3E X = 0.10 pu on 50 MVA 100 km. X = 0.5 Q/km. for each line 25 MW, 0.8 pf lagging base 60 MVA 40 MVA 11/132 kV 132/33 kV 5 MW, 0.9 pf lagging X = 11% X = 9% Fig. (Q2)
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