On Monday, August 6, 2018 at 3:48:13 PM UTC-4, Ralph Mowery wrote:
In article ,
says...

We live in the real world, not some place where theory trumps reality

The fact remains when you rotate an angle to 180, you have a straight
line and there is no phase angle.
When you stand in the middle of anything and look both ways, you might
think you are looking at two things but it is one thing



I don't feel lke getting into this, but ask old T4 what hapens to his 2
phase transformer and 2 chanel o-scope if he hooks the 'ground' to one
end of the transformer and looks at the signal withthe other 2 probes at
the center and other end.

I went through that with Fretwell already. Look, I was accused of doing
a "parlor trick" with a scope. What did I do? I connected the scope
ground to the SYSTEM neutral. I did not define the neutral as the reference
point, the system designers did. So, it's not a parlor trick to connect
a scope as any beginning student would to look at what's going on in that
circuit. Connect the scope ground to the neutral, put traces of the two
hots on the screen. What do you see? Two 120V voltage sources that are
180 deg out of phase with each other. THAT is the whole point of the Edison
circuit! If you believe you can draw this circuit, model it without two
120V voltage sources that are 180 deg out of phase, or of opposite polarity,
same thing, then show us how. This is the first couple days of circuits 101.
It's the only way to model that circuit, to explain what's going on.




Then try that with a 3 pahse system.

Sigh, IDK where you're going with that. Perhaps you'd like to answer
the simple questions where I start out with 3 phase and step by step
turn it into the same thing as 240/120. And please, if you're going to
do it, don't start wandering off into the wilderness with transformers.
It's very simple stuff. You'd be the first person here, beside myself,
who can answer it:

Problem number 3

I take 3 phase power with a neutral into a house. One phase is at zero,
one is at 120, one is at 240, correct? I can see them on a scope, yes?

Now I rotate one coil so that instead of 120, it's at 179. Are there
still three phases?

Now I rotate it one degree more, to 180. Are there still 3 phases,
yes or no?

Now take away the 240 phase. How many phases now? If it's not two,
explain why.

And if it is two, then again, it's now ELECTRICALLY IDENTICAL TO 240/120 service.
IF you believe it's electrically different, explain why and how it matters
in terms of the behavior of the electrons in the service conductors.