Delta–star and star–delta transformations

The network shown in Figure 37.1(a) consisting of three impedancesZA, ZB and ZC is said to be π -connected. This network canbe redrawnas shown inFigure 37.1(b), where the arrangement is referred to asdelta-connected or mesh-connected. The network shown in Figure 37.2(a), consisting

of three impedances, Z1, Z2 and Z3, is said to be

T-connected. This Figure 37.2(b), where the star-connected.