The phase relationship relates to how the waveforms superimpose in time. For two signals of the same frequency they are in phase when there zero crossing times coincide. When out of phase the zero...
A clearance is defined as shortest distance through the air between two conductive elements. Practically all generators and many motors and high-power motors have 3 power conductors: the 3 phase...
"G2 phase" probably refers to a phase of normal biological cell life, also known as the "second gap phase". The G2 phase is immediately preceded by the S (DNA synthesis for chromosome duplication)...