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Don Foreman Don Foreman is offline
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Default Step up transformer 240V to 480V 3 phase

On Wed, 27 May 2009 03:17:36 +0000 (UTC), David Lesher
wrote:

"Lloyd E. Sponenburgh" lloydspinsidemindspring.com writes:


I know of no reason you can't do exactly that, and have done
so at lower power levels.


Ignorance doesn't make it work properly.


Sorry, but you and Gunner are reading off the same page, and it's not
even in the electronics book.


Well, I got an A in EE421; and was proud of it. Granted it was 20+ years
ago, but last I heard Maxwell, RH rule and that guy Thevenin still hold
to this day.

Sure there are losses, all kinds of losses.. We got copper resistance
losses, we got eddy current losses, you name it. But I don't recall any
reason they don't apply no matter which way you go. Can you cite a source
to back you up?


Easy thar, fellas, this ain't politics. All of you are right.

Xfmrs with smaller VA or KVA ratings are designed with a bit of fudge
factor so they'll deliver rated voltage at rated load in spite of
droop at rated load. Larger xfmrs are designed to have negligible
droop at rated load because to do otherwise would result in
unacceptable inefficiency and heating.