[Amps] 3 phase transformer

[Tomm V Aldridge]

Take care with core saturation as the cross section of the center leg is
equal to those of the outer legs in a three phase xfmr which is not the case
with a single phase xfmr where the center leg area is 2 times that of the
outer legs as the flux is split evenly between the outer legs.  Running the
center primary at the three phase voltage divided by sqrt 3, 120 on a 208V
transformer, will allow you to take the secondaries in all three legs in
series or parallel as long as you observe the phasing.  Paralleling is
always iffy a any flux or turns imbalance will show up as a shorted turn and
generate excessive heating n the windings.

Tomm - KD7QAE

On Sun, May 15, 2011 at 9:49 PM, Ronald Brown <rg52brown at yahoo.com> wrote:

> I have a 3 phase plate transformer I want to use on single phase.  It has 3
> separate sections and the secondaries can be separated.  Can I just parallel
> them up ?   I realize core limitations will play into this but is there any
> problem with just paralleling up all three sections?
>
> ron - K0idx
>
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