20 Apr
1999
20 Apr
'99
3:03 p.m.
Realy 234V (strange) and 180 degree ? Where do you know ? By definition ?
Just remember, if you tap between 2 phases of a 3~ signal you still get
a perfect sinus and you can't decide if it is a single phase or part of
a 3 phase signal. Ok, I'm always learning new things on this earth :9
The numbers just saemed to fit well.
It's 230, 231, whatever it takes (from the movie "Mister Mom").
I'm sure the power company has a legal obligation to keep the voltage
within a certain range of values. Although, I don't know exactly what that
range is. I think 117 is probably the optimal value for each of the legs
giving 234 for the total. I've heard it referred to as 110, 115, 117, and
120. Since the actual voltage varies any of these could be correct.
Since it is a simple transformer, the phases are 180 degrees out of phase
(by definition). That's assuming a balanced resistive load. Of course, that
could change under a heavy inductive or capacitive load but, that's an
extreme and won't normally present a problem.
Steve Robertson - <steverob(a)hotoffice.com>