This is why I contacted the manufacturer at the same time the original
message was posted here. I don't expec to hear from them any time
soon...Since changing the freq is out of the question, I am most curious
about Dwayne's solution...

CL

>
> The core in question *may* work at 277V but this can only be
> determined by
> testing or consulting the manufacturer.  Since excess core
> usually means
> excess expense, the cores are usually made to just barely do
> the job and
> typically run warm at rated load. Raising the voltage will
> usually raise
> the temperature also. Determination of suitability is left as
> an exercise
> to the student.
>
> Tom M.
>
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>
>

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