Positive SSL
A 20安培
B 10安培
C 5安培
D 2.5安培

a= V1/V2= 220/110= 2

I2= V2/Z= 110/11= 10

I1= I2/a= 10/2= 5A


A 0.75%
B 1.5%
C 1.2%
D 2.4%

基準阻抗Zb =Vb/Ib=200/80=2.5Ω

百分阻抗Z%=Z/Zb=0.03/2.5=1.2%


A 193.6Ω
B 9.68Ω
C 0.484Ω
D 0.0242Ω

基準阻抗 Zb = Vb2/Sb = 22002/50×103=96.8Ω

實際電抗 X1= Zb × X% = 96.8 × 10%= 9.68Ω


A 0.067 + j0.133
B 0.133 + j0.266
C 0.0138 + j0.0276
D 0.011 + j0.022

基準阻抗 Zb=Vb2 / Sb=30002/100k=90Ω

標么阻抗 Zpu = Z / Zb = 1+j290=0.011+j0.022


A 0.013pu
B 0.017pu
C 0.13pu
D 0.17pu

Zpu = Rpu2+Xpu2

= 0.0052+0.0122 = 0.013

Zpu′ = Zpu × S′S

= 0.013 × 1000100 = 0.13pu