Re: Transformers & frequency....

Doug,

All things being equal, a 50Hz transformer is 20% bigger than a 60Hz
xformer for the same power rating (60/50).

Up to a point, you can run a higher than rated frequency thru a
transformer (about about a couple of kHz) without any problems.

Mariss

--- In CAD_CAM_EDM_DRO@y..., "doug98105" <dougrasmussen@c...> wrote:
> Group,
>
> What's the story on transformer hertz ratings? I have a couple of
> transformers connected in an open delta configuration to boost my
> 220V three phase to 440V for my motors that are not dual voltage.
If
> I were to input these transformers from a VFD, how would the
variable
> frequency (up to at least 120hz) affect them?
>
> I'm asking this question because I notice all transformers seem to
> have a hertz rating.
>
> thanks,
>
> Doug