Subject: Re: High DC current Transfer Switch
Date: Thu, 28 Nov 2002 00:11:28 GMT
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Actually, the switches would be on the order of 1000 A.
I chose to come here rather than only to manufacturers as they are too
often limited in view to their manufacturing capabilities as they see
them. This is a very narrow view point.
Often, there are fresh, new viewpoints obtainable from this newsgroup
- others are not so insightful.
On Tue, 26 Nov 2002 08:06:06 +0000, John Woodgate
>I read in sci.electronics.design that firstname.lastname@example.org wrote (in
><email@example.com>) 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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