transmission line

[Rei]

Determine the constant of a three-phase line having the following specifications:

conductor 900,000 cir mil ACSR

spacing 14ft horizontally *14ft*14ft

length L 125 miles

frequency 60Hz

The table that I have listed three different type for 900,000 cir mil, Baldplate, Canary, and Ruddy. How do we know which one to pick?

Also, the conductor table that I have has only a few types. Where would be a good resource? I assume for the test, we are responsible to have the table handy.

 

[pelaw]

EERM 37-3 gives propagation constant as equal to inverse sqrt of L line * C line. EERM 37-7, Three Phase Transmissions, provides for calculation of L line and C line. Let me know if that answers it and makes sense.