Chapter Two, the components. As a starting point, let's look at the positive sequence components first, each phasor of the positive sequence is has the same magnitude, each positive sequence phasor quantity is displaced from the other by 120 degrees and all the phasers are rotating counterclockwise giving a phase sequence as they rotate of A, B, C. The negative sequence components are similar, but are different of course, in that each phaser has the same magnitude and each of these quantities are displaced by 120 degrees from one from the other. However, the negative sequence quantities have a clockwise phase rotation, giving a phase sequence A, C, B. Now, it's a little bit difficult to deal with phasers rotating in opposite directions. So you'd like to maintain the fact that all of the sequence components are rotating in the same direction. And in order for this to happen, we still have to maintain the same sequence.

So we we let the negative sequence components rotate in a counter clockwise rotation. But the negative sequence quantities have, as I said, a counterclockwise rotation, but the phase rotation giving the face sequence ACB If the phasers C and B are swapped, in other words, you swap two of the phasers and then you can rotate them in the counterclockwise rotation, so that both your positive and negative sequence components here are rotating in the same direction. However, they have a difference sequence in that the positive sequence is ABC, and the negative sequence is a CB. In the case of the zero sequence components, each zero sequence phasor has the same magnitude. However, the three phasers have no angular displacement between themselves. They are all in face, they are all going in the same direction zero see phasor quantities have a counterclockwise rotation.

But again, they are all in phase one with the other. This end chapter two