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From: John Woodgate
Subject: Re: High DC current Transfer Switch
Date: Tue, 26 Nov 2002 08:06:06 +0000
Organization: JMWA Electronics Consultancy
Reply-To: John Woodgate
NNTP-Posting-Date: Tue, 26 Nov 2002 08:27:52 +0000 (UTC)
X-Newsreader: Turnpike (32) Version 4.01 <5Z8C9wtxbnpWyFnyfFzqmVF739>
I read in sci.electronics.design that email@example.com wrote (in
<firstname.lastname@example.org>) about 'High DC current Transfer
Switch', on Tue, 26 Nov 2002:
>I have some applications where I take 480 VAC, rectify it and delivery
>it to a resistive load. The system range from 50 KVA to 300 KVA. DC
>volts range from 30 to 120 V (not necessarily perportional to power).
>Often, I will provide two parallel systems ( 2 X 100%) so one train
>may be taken off line so the load can be worked on. It has been
>traditional to provide a transformer/rectifier set for each train. It
>would seem that there must be a cost effective way to utilize a DC
>transfer switch in lieu of multiple transformer/rectifier sets. I
>would be happy to consider auto and manual switches.
>I am also open to the transfer switch be of the non-interrupting type.
>It is OK to de-energize the whole system prior to transfer. I am open
>to this method, although I am not sure it is the safest method.
>All considerations would be appreciated.
A 10 000 A switch isn't electronics, it's civil engineering. (;-)
Do you seriously think that even s.e.d is the right place to get advice
on such a project? You need to go to major high-power electrical
engineering equipment manufacturers.
Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk
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