2.2.2 Negative Phase Sequence

In case of a negative/reversed phase sequence, the voltage on all the three lines of three-phase supply cycles through 360° while phase L3 lags phase L1 by 120° and phase L2 lags phase L1 by +240°. The sequence L1 – L3 – L2 is termed as negative or reversed phase sequence.

Figure 2-1 ‘b’ shows the negative or reversed phase sequence of the three-phase supply, where phases L2 and L3 are interchanged from the normal sequence.