The Electrical Power at our home outlets is ac in nature. Whereas the power coming through the transmission lines is three phase in nature. The voltage and current relationships for single phase ac are quite easy to understand. However, with three phase these concepts are quite difficult to understand.
Here, the concepts of delta and wye configurations are involved too, making the formulas somewhat more complicated. In this infographic, all these relationships have collaborated on one place so as to compare them and then understand them.