Subject: Re 765 kV powerlines (fwd)
Date: Thu, 26 Feb 1998 092531 -0600 (CST)
From: "Roy L. Beavers" <rbeavers@llion.org>
To: emfguru@hotmail.com
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---------- Forwarded message ----------
Date: Thu, 26 Feb 1998 08:28:36 GMT
From: Alasdair Philips
To: "Roy L. Beavers" , emfguru@hotmail.com
Subject: Re: 765 kV powerlines (fwd)
Dear Dave
400 - 500kV is about the limit for undergrounding transmission lines
and even at this voltage it is very expensive - the individual conductors
are run in oil-filled and cooled tubes. Extruded plastic insulated cables
are possible now at 275kV and some experimental work has been done by an
Italian company at 400kV but I believe is is not yet commercially practicable.
Generally line above about 275kV are only undergrounded for short distances
for very special reasons.
In the UK it costs about 0.5 to 1 million GBPounds for one km of an overhead
400kV double circuit line, and from about 8 to 16 million for one km of an
underground one.
Sorry this is not very encouraging.
Alasdair.
Powerwatch (UK)
=============================================================
At 20:16 24/02/98 -0600, Roy L. Beavers wrote:
>
>
>---------- Forwarded message ----------
>Date: Tue, 24 Feb 1998 20:04:23
>From: "Richard W. Woodley"
>To: rbeavers@mail.llion.org
>Subject: 765 kV powerlines
>
>
> Perhaps one of the experts on the list can help him out:
>
>>Return-Path:
>>Date: Sun, 22 Feb 1998 20:27:53 -0500
>>From: "David M. Orcutt"
>>Reply-To: dmorcutt@vt.edu
>>To: woodley@travel-net.com
>>Subject: 765 kV powerlines
>>
>>To whom it may concern: I am looking for information relative to the
>>technological feasibility of burying 765 kV transmission lines. I am
>>from Virginia and several groups here are in the middle of a battle with
>>AEP trying to prevent the building of the powerline from Wyoming WV to
>>CloverdaleVA some 132 miles. Do you know of any instances where
>>powerlines of this voltage or in the order of 500 kV have been buried
>>and what the cost of doing so would be? One electrical engineer I have
>>talked to indicated that 765 kV lines would stretch the technology what
>>ever that means.
>>
>>Your help is appreciated
>>
>>Dave Orcutt
>>
>
> Richard W. Woodley (woodley@travel-net.com)
> http://www.ncf.carleton.ca/~ab190/
>************************************************************
>Bridlewood Electromagnetic Fields (EMFs) Information Service
> http://www.ncf.carleton.ca/bridlewood-emfinfo/
>
>
>
Alasdair Philips (aphilips@gn.apc.org)
Archive provided courtesy of WaveGuide, http://www.wave-guide.org
Reprinted with permission of Roy Beavers, http://www.feb.se/EMF-L/EMF-L.html