Figure Q1 shows the one-line diagram of a three-phase power system. By selecting a common base of 25 MVA and 13.8 kV on the generator side. i) ii) iii) Draw an impedance diagram of the power showing all impedances in p.u. Calculate the motor current in p.u. Calculate the motor current in Amperes. G TE bus 1 25 MVA 13.8 kV 15% KA 25 MVA 13.2/69 kV 11% j65 Q Figure Q1 bus 2 ∞+M AR 25 MVA 69/13.2 kV 11% T 15 MVA 13 kV 15%

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Figure Q1 shows the one-line diagram of a three-phase power system. By
selecting a common base of 25 MVA and 13.8 kV on the generator side.
i)
ii)
iii)
Draw an impedance diagram of the power showing all impedances in
p.u.
Calculate the motor current in p.u.
Calculate the motor current in Amperes.
G
TE
bus 1
25 MVA
13.8 kV
15%
RA
25 MVA
13.2/69 kV
11%
j65 Q
Figure Q1
bus 2
∞O+M
AR
25 MVA
69/13.2 kV
11%
T
15 MVA
13 kV
15%
Transcribed Image Text:Figure Q1 shows the one-line diagram of a three-phase power system. By selecting a common base of 25 MVA and 13.8 kV on the generator side. i) ii) iii) Draw an impedance diagram of the power showing all impedances in p.u. Calculate the motor current in p.u. Calculate the motor current in Amperes. G TE bus 1 25 MVA 13.8 kV 15% RA 25 MVA 13.2/69 kV 11% j65 Q Figure Q1 bus 2 ∞O+M AR 25 MVA 69/13.2 kV 11% T 15 MVA 13 kV 15%
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