You may find the current doesn't drop significantly as the power consumprion
does.

When load is removed from sysncronous motors the power factor decreses to
the bottom, the current stays relatively in the same ball park, depending on
motor design.

If you put a Kill-a-Watt monitor on it you may a huge difference in
consumption.



"Robert Green" wrote in message
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"Existential Angst" wrote in message
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"Robert Green" wrote in message

stuff snipped

I think what you'll find is that your killawatt will show a substantial
DECREASE in current. The motor is not laboring, but actually speeding up,
as there is no air to load it. Almost counter-intuitive, that as a vacuum
clogs, it works less!

Exactly correct. Very odd to see, but about 4A less when screaming like a
rocket.

--
Bobby G.