How big (size) can the tertiary winding be in transformer? Can we load the ter

How big (size) can the tertiary winding be in transformer?
Can we load the tertiary winding, if yes then how much we
can load it?

Question Posted / santosh

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How big (size) can the tertiary winding be in transformer? Can we load the tertiary winding, if ye..

Answer / rabramovitz

Tyically for stabilizing an oscillating neutral, about 35%
of the KVA (or VA) supplied. Yes, it can be loaded, as long
as you don't exceed the current rating for its gage (do not
exceed current which causes a temp rise at or below the
class of the transformer). The current capability (if
properly designed)will be about a third of a primary phase
current normalized to the tertiary ratio. (call it NI/3)on
a per phase basis.

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