>>If the source does not supply the current, then the source voltage will become deformed (distorted) by the excess peak current.
I'm not an electrical engineer by any stretch of the imagination,
but I think what APC is getting it is that if the peak current
at the PEAK VOLTAGE of the cycle doesn't match what the source
requires, then the net effect is a reduced voltage at the
cycle peak into the resistive load. It's the resistive load
(volts*amps at the same point in the cycle) that determines
the instantaneous power delivered. That is, the voltage
across the load is in effect reduced.
As to UPS vs SPS, there may have been once upon a time such
a distinction regularly made, though I don't know that for
sure. Anyhow, in my recent memory it is common to refer
to anything that supplies continuous power as being a
UPS. The distinction lies in classifying UPSs as switching
or not, that is, does the UPS supply its power from the
battery all the time or only when the regular source fails.
It's certainly not only APC that uses this terminology,
though I don't know if it's universal.
In my mind I think of the 5kw Onan diesel generator out behind
the tool shed as the SPS <ggg>. Alternating current takes
on a whole different meaning if you grew up far enough out
in the sticks (lessee, now, this week we get current
Tuesday & Thus, I think, and next week Sunday & Wed afternoon,
and ... <g>). |
