Date: Tue Mar 24 11:33:22 2009 Back to Contents ------------------------------------------------------------------------

Author: chuck britton

Subject: Re: Power Lines and cows?

Post:


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It is rare for anything other than 60 Hz to be used. These come in
three wires = three phases.

A FEW long lines use DC at high voltage.
Don't know if there are two lines or if the ground can carry the return.

For a given maximum voltage - DC can deliver more power.
AC to DC is cheap and DC to AC is getting cheaper.


On Mar 24, 2009, at Mar 24(Tue) 10:52 , Doug Johnson wrote:

> What frequency are they using for those high tension lines
> anyway?
> Anyone know? ...Doug


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It is rare for anything other than 60 Hz to be used. These come
in = three wires =3D three phases.

A FEW long lines = use DC at high voltage.
Don't know if there are two lines or = if the ground can carry
the return.

For a given = maximum voltage - DC can deliver more power.
AC to DC is cheap = and DC to AC is getting cheaper.


On = Mar 24, 2009, at Mar 24(Tue) 10:52 , Doug Johnson wrote:

=A0=A0= =A0 What frequency are they using for those high
tension lines = anyway?

Anyone = know?=A0 ...Doug

=


=

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From tap-l-owner@lists.ncsu.edu Tue Mar 24 11:33:22 2009

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