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Aerial Fiber: Composite Ground Wire with Optical Fiber or Optical Ground Wire (OPGW)
From: David Farber <dave () farber net>
Date: Tue, 14 Apr 2009 05:10:50 -0400
Begin forwarded message: From: "Mark Goldstein" <markg () researchedge com> Date: April 14, 2009 1:20:55 AM EDT To: <dave () farber net>, "'ip'" <ip () v2 listbox com>Subject: Aerial Fiber: Composite Ground Wire with Optical Fiber or Optical Ground Wire (OPGW)
For IP if you wish: Actually, U.S. power companies commonly use Composite Ground Wire withOptical Fiber or Optical Ground Wire (OPGW) cables deployed aerially along with their high voltage transmission lines. It's a ground wire sheathed with multiple fiber strands, up to 96 unique optical fibers, maybe higher. Thus incremental cost of adding on newly built transmission facilities is quite
modest and for existing infrastructure still relatively low cost asdeployment is overhead. Of course much safer sheathing a ground wire than a
high voltage line.In the Phoenix area, Salt River Project has probably the third most deployed fiber after Qwest and Cox, the incumbent phone and cable companies. They do
bury a small amount of it where they control federal canals and theassociated right of way for those and in strategic spur extensions to on net
buildings, but primarily deploy on all 64KV andabove distribution pathways. They have a telecom revenue center within their
enterprise to lease use of this fiber to telecom providers under Master License Agreements as well as place vertical assets (leasing use and backhaul) to cellular providers at over 200 locations. You can see an overview of their fiber deployment at http://www.srpnet.com/telecom/telecommap.aspx FYI. They do support their own runs into most telecom COs, cable MTCs, andregional data centers. as well as into some commercial buildings or through business parks. Additionally they will splice into the OPGW at any of their transmission towers and run down the tower to a small vault at the base for handoff, but getting ROW and fiber paths to the point of delivery from there
can still be challenging. A number of such OPGW cables can be seen on one manufacturers site athttp://www.afltele.com/products/fiber_optic_cable/opgw_cable/ index.html FYI.
Best Regards, Mark Goldstein, President International Research Center Voice & Fax: 602-470-0389, Skype: mark.goldstein LinkedIn: http://www.linkedin.com/in/markgoldstein E-Mail: markg () researchedge com, IRC: http://www.researchedge.com/ Harnessing Global Information Resources for Informed Decision Making -----Original Message----- From: David Farber [mailto:dave () farber net] Sent: Monday, April 13, 2009 6:46 AM To: ip Subject: [IP] Re: The Smart Grid and Cybersecurity Begin forwarded message: From: Bjørn <bv () norbionics com> Date: April 12, 2009 8:14:11 PM EDT To: dave () farber net Subject: Re: [IP] Re: The Smart Grid and Cybersecurity On Sun, 12 Apr 2009 16:52:36 +0200, David Farber <dave () farber net> wrote:
Begin forwarded message: From: Peter Swire <peter () peterswire net> Date: April 12, 2009 10:17:07 AM EDT To: "dave () farber net" <dave () farber net> Subject: RE: [IP] Re: The Smart Grid and Cybersecurity Hi Dave: I took part of the weekend off, but here are some responses to Thomas Lord's thoughtful questions. Format is his question then my response: 1. How are cost savings obtained by putting up high voltage power lines and fiber at the same time? My naive understanding is that the power lines are generally strung between towers while fiber is usually buried. Even if the same right of ways are used it seems like you are suggesting having two crews, in the same spot, at the same time, getting in one another's way. I did find reference elsewhere to case in Germany where power and fiber were both buried and were buried in the same conduit - so I can see the cost savings there - but is that the plan here?
At least in Norway, fiber is spun around the high voltage line. I can see a cost saving from installing power lines with the fibe already integrated with the conductor instead of using crawling robots to spin fiber around the conducor after it has been put in place. ------------------------------------------- Archives: https://www.listbox.com/member/archive/247/=now RSS Feed: https://www.listbox.com/member/archive/rss/247/ Powered by Listbox: http://www.listbox.com
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- Aerial Fiber: Composite Ground Wire with Optical Fiber or Optical Ground Wire (OPGW) David Farber (Apr 14)