# Wattage Carried by 161 KV Line

#### lal

Joined Feb 23, 2007
1
I am trying to figure out how many megawatts are carried by a 161 KV, 3 phase line. The wire diameter is .6 inches. Is there any other info that would be needed? Thanks

Joined Nov 1, 2006
133
Yes, you need to know the current in amperes & the power factor [or cosine of the phase angle]. 3 phase power [in watts]=1.732XVoltageXCurrentXPower Factor.

#### kubeek

Joined Sep 20, 2005
5,793
Bare copper wire can take about 3A/mm2.

I guesstimate the maximal power could be somewhere between 100-150MVA.

#### subtech

Joined Nov 21, 2006
123
In the U.S., the most common conductor for transmission line use is aluminum,or more specifically ACSR (Aluminum conductor steel reinforced) so here is your conductor info and ampacity rating per the Lineman and Cablemans Handbook.
Your conductor diameter(true dia. of .609 in.) falls into the category of an aluminum conductor of 266.8 Kcmil (Cable code word "Waxwing") and has a nomimal current carrying rating of 430 amperes with a 40 deg. C rise over an
ambient temp of 40 deg. C.

#### kubeek

Joined Sep 20, 2005
5,793
Well that makes 120MVA.

I love when I am right

#### tek_fool

Joined Feb 24, 2007
12
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