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"steve" wrote in message
. net...
hi

can anybody help ?

I'm doing some measurements on assorted power transformers (3VA to 100VA)
and
am wondering what the general term is for the difference in output voltage
between no load and full load conditions. Probably expressed as a
percentage.

Steve
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It is called voltage regulation. When specifying it you should also indicate
the power factor as that will have a considerable effect.

VR =(no-load voltage magnitude-full load voltage magnitude)/full load
voltage magnitude as a %
Full load voltage is nominally rated voltage and, strictly speaking, the
tests should be at rated output voltage and load KVA.

--

Don Kelly
remove the X to answer