Re: Coupling coefficient of industrial transformers

On Apr 7, 10:15 pm, "Tom Bruhns" <k...@xxxxxxx> wrote:
On Apr 7, 9:24 am, "orvillefpike" <orvillefp...@xxxxxxxxx> wrote:

Would anybody know what is the coupling coefficient of step-down,
commercial type, transformers like the ones used in shops, like a
three phase 15 Kva or a 30 Kva?
Thanks

So, measure one.

I'd bet it's higher than Tim's guess. I've measured RF transformers
with better coefficients than .99, and with the much higher
permeability of mains-frequency cores, it should be easy to get over .
99. Admittedly, the RF transformers are wound specifically for tight
coupling.

Cheers,
Tom

How do I measure it?
In the simulation, if the transformer has .990, it's a lot different
than .995, for example.
Thanks

.

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