Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.milw.wisc.edu!lll-winken!uunet!kitty!larry
From: larry@kitty.UUCP (Larry Lippman)
Newsgroups: sci.electronics
Subject: Re: How efficient are transformers?
Summary: More efficient than many would believe...
Keywords: transformers electrical
Message-ID: <3083@kitty.UUCP>
Date: 10 Apr 89 04:31:11 GMT
References: <731@hutto.UUCP>
Organization: Recognition Research Corp., Clarence, NY
Lines: 23

In article <731@hutto.UUCP>, henry@hutto.UUCP (Henry Melton) writes:
> Does anyone have any definitive numbers on the efficiency of
> transformers?  in particular, the ones on the poles outside the house.
> I was having a discussion with a friend the other day and he was
> claiming that upcoming improvements in core material would increase the
> public power distribution system efficiency by large (10%,20%) amounts.
> I was under the impression that the gadgets were already so efficient
> that there wasn't that much headroom to play with.  

	High-voltage distribution transformers are more efficient than
many would believe, and in general, the efficiency improves as the kva
rating increases.

	A typical single-phase oil-filled pole-mounted transformer rated
at 10 kva has an efficiency around 97%.  As the kva rating increases,
the efficiency generally peaks out around 98.8% at 200 kva and above.

	Can't get much better than that...

<>  Larry Lippman @ Recognition Research Corp. - Uniquex Corp. - Viatran Corp.
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