The Cyber-Spy.Com Usenet Archive Feeds Directly
From The Open And Publicly Available Newsgroup
This Group And Thousands Of Others Are Available
On Most IS NNTP News Servers On Port 119.
Cyber-Spy.Com Is NOT Responsible For Any Topic,
Opinions Or Content Posted To This Or Any Other
Newsgroup. This Web Archive Of The Newsgroup And
Posts Are For Informational Purposes Only.
From: John Woodgate
Subject: Re: Strange failure mode in switchmode power supplies: Followup
Date: Sun, 22 Sep 2002 01:26:54 +0100
Organization: JMWA Electronics Consultancy
Reply-To: John Woodgate
NNTP-Posting-Date: Sun, 22 Sep 2002 05:52:06 +0000 (UTC)
X-Newsreader: Turnpike (32) Version 4.01 <5Z8C9wtxbnpWyFnyfFzqmVF739>
I read in sci.electronics.design that Tony Williams
wrote (in <firstname.lastname@example.org.
uk>) about 'Strange failure mode in switchmode power supplies:
Followup', on Sun, 22 Sep 2002:
>In article ,
> red rover wrote:
>> I thought the UK homes
>> were fed by coax power feeds. I'm not sure I follow
>> your description. Is this transformer a Delta-Y transformer?
>> Is there an online diagram?
> There is a 3-wire overhead hv supply (11KV?)
> coming up the valley to this village, feeding
> a number of 3-phase transformers. The primaries
> are delta-wired, and the 3-phase secondaries
> are star-connected, 230V Line-Neutral, 400V
> Line-Line. Each house is fed with just one
> of those 230V Line-Neutral phases.... the other
> phases going to other houses. In urban areas
> the transformers will be large enough to feed
> a number of houses off each Line-Neutral phase.
> Only high power consumers (factories/farms) are
> fed with all three phases, and they are generally
> required to keep the loading approximately balanced.
The service cables are coaxial in later installations but there are many
indeed that are not: 2 cores and the armour is the supplier's
Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk
Interested in professional sound reinforcement and distribution? Then go to
PLEASE do NOT copy news posts to me by E-MAIL!
Go Back To The Cyber-Spy.Com
Usenet Web Archive Index Of
The sci.electronics.design Newsgroup