DISTRIBUTION SUBSTATION Flashcards
1
Q
1-phase 2 wire inductance per conductor
A
2x10^-7 ln(D/GMR)
GMR = 0.7788r
2
Q
loop/total inductance single phase
A
4x10^-7 ln(D/GMR)
GMR = 0.7788r
3
Q
3-phase unsymmetrical spacing inductance
A
2x10^-7 ln(GMD/GMR)
4
Q
3-phase symmetrical spacing inductance
A
2x10^-7 ln(D/GMR)
5
Q
GMR of stranded conductor
A
n^2 th root (n^2 distances)
6
Q
GMR of 2 bundled conductor
A
sqrt(Ds X d)
7
Q
GMR of 3 bundled conductor
A
8
Q
GMR of 4 bundled conductor
A
9
Q
voltage regulation of transmisison line
A
10
Q
efficiency of transmission line
A
11
Q
single phase line-to-line capacitance
A
12
Q
single phase line to neutral capacitance
A
13
Q
three phase line capacitance
A
14
Q
corona power loss
A
15
Q
ungrounded system arrester rating
A
