As far as I know, there is no official definition for the term 'phase' as used to describe the lines of a multiphase system. But, it is clear that it means that the voltages on legs A, B, and C carry different phase angles, namely A, B, and C. So there is no difference.
Why is this being dragged off to three-phase again? How about we stick with the phasors?
You had better come up with a better explanation for Rcos and Lcos. Perhaps you could explain a bit further and tell us how I*L*cos is used? I*XL makes sense but I*L is just plain wrong. And, the use of trig terms in this expression is wrong as well, plus we are not talking about any currents or inductances anyway.
argumentium ad hominem, an attack on my credibility rather than my statements which
iwire has already cautioned us about. But you should know, my math training comes from a Dr of Physics, a Dr of Mathematics, and three Masters in Mathematics. How about we get back to phasors rather than personal attacks?
I have a split phase system in my home, and I am quite sure the phases on L1 and L2 are separated by PI radians. I am sure Tektronix would tell me the same, but try as I may, I cannot change that phase relationship without climbing the pole and rewiring the transformer. Not sure I could anyway since there are only three bushings.
And once again, you're using the overloaded word
phase according to definition (2). Which once again by definition (2) L1 and L2 are opposed phases hence
argumentium ad nauseaum. Repeating def (2) over and over will never make it apply to "Why we call it single phase?". Definition (1) is required. I believe you are stuck in the proverbial rut. Prove that measuring L1 and L2 relative to neutral can be used to determine how many system (not voltage) phases are present.
Yes, it does, but that does not prevent us from labeling the three lines in a wye for example as phase A, phase B, and phase C.
When we say phase A for example, we mean the voltage on line A with a unique phase angle which is different from the phase angles of phases B and C. It all goes back to the official definition of phase which is the argument of the sinusoid describing the waves.
I believe in some texts, 'static phase' is defined as opposed to 'instantaneous phase'. That would simply be the phase angle, and that is what we deal with most of the time.
Round and round back to three-phase again. When YOU say "phase A" you are using definition (2) which provides no more proof to why three-phase is called three-phase than what you've provided for single-phase. Adding three-phase just adds obfuscation to this thread.
That is the whole point. We are discussing the voltages on L1 and L2, not the voltage on the neutral. The neutral is the obvious choice for a reference.
The phases of V1n and V2n must be separated by PI radians for Bes's full wave rectifier to work properly. That is why he correctly states that there are 2 phases albeit from a single phase transformer.
Now tell my why my statements are incorrect.
We are supposed to be discussing "Why we call it single-phase?". L1, L2, N are all valid reference points. And again, I will tell you why your statements are ... wait for it ... repititious though it is ... CORRECT BY DEFINITION (2) but don't answer "Why we call it single-phase?" once again.