Calculating medium voltage (5kV) conductor resistance????????

[AWinston]

I'm having some trouble with my calculations. I have a 1,700 ft run. The transformer output will be 4160V at 41.54A on the primary. Using below as an example, I am getting outrageous resistance values. Something has to be wrong. Am I able to ignore capacitive reactance like Table 9 of the NEC does for 600V conductors?

#8 three conductor wire (DC resistance(R) = 0.647 ohm/km, Inductive Reactance = 0.2635 ohm/km, Capacitive Reactance = 9815 ohm/km)

Z = R cos(theta) + Xsin(theta)
theta = cos-1(.85) = 31.78 deg
R = 0.647 ohm/km
X = XC-XL = 9815 - 0.2635 = 9814.7 ohm/km

Z=5169 ohm/km
Z = 5169 ohm/km / 3280.84 = 1.57 ohm/ft

 

[bob]

Check your other post. No need for 2 posts on the same question.

 

[AWinston]

Check your other post. No need for 2 posts on the same question.

I wanted to go back and delete the question from the previous post but I didn't find a way to do it.

 

[bob]

Ask moderator. click tab upper left