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Re: Overdriving potential transformers
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To: tesla-at-grendel.objinc-dot-com
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Subject: Re: Overdriving potential transformers
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From: "Malcolm Watts" <MALCOLM-at-directorate.wnp.ac.nz>
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Date: Fri, 29 Mar 1996 07:37:19 +1200
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Hi all,
Steve Roys asked....
> How much current can I get from my 1.5kVA, 14400 potential transformer
> before some kind of catastrophic failure occurs - 2kVA? 3KVA? more? I
> have assumed that as long as I don't exceed the rated voltage, a PT would
> be almost as bullet-proof as a pole transformer and would be pretty much
> limited by the temperature rise (i.e. - turn it off when it starts
> getting warm). Is this a reasonable assumption or am I going to quickly
> end up with a dead PT by running it at a higher current than what it's
> rated for?
I have been running a demonstration transformer on my coil at about
1.6kVA to 1.8kVA (depending on secondary o/p :) but with run times
not exceeding a minute. I would rate the transformer as suitable
for 1kVA continuous. I have been doing this a long time now. I
judge the end of a session by the temperature rise on the outside of
the secondary. I see no reason why I couldn't continue this mode
of operation indefinitely.
Malcolm