What is meant by 120 phase difference?
Answer:
It means 1 signal is delayed by 1/3 of a cycle when compared to the other
120 X 3 = 360
A singel cycle of a signal takes 360 degrees.
2pi/3
it means that the lag between two waves is 2pi/3
if u consider about a three phase line,each line performs a difference in flow of signal ie; when u are going to draw a signal graph {current etc}in AC circuit,its stating point of 1st ,2nd,3rd line's will start from a particular distance with each other
this difference of time is known phase.in three phase construction time by an alternator three windings are placed in a angle of 120 degree difference so that the supply will produce with a difference of time. each phase have a difference of time 120 degree{in electrical phase difference time measured in degrees because the electrical signal producing from a rotating machine [generator]}
vectorially, in 3 phase systems, the difference between phases is 120 degree
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