The
operating frequency determines the transformer size and
weight for a given output power-higher frequency
generally means a smaller transformer.
A
transformer designed for 60 Hz operation only will
therefore be smaller and lighter than one designed for
50/60 Hz operation, though this size reduction will not
be considerable for a difference of only 10 Hz. However,
a transformer for 400 Hz operation may be up to 80%
smaller than a 50/60 Hz transformer. It is important to
specify the minimum expected operating frequency of
transformers, as operation is possible above the
designed frequency but not below. |