star delta transformation
The Y-Δ (wye-delta) and Δ-Y (delta-wye) transformations are used to calculate the resistances in the corresponding Δ or Y circuit. These circuits consist of three resistors connected as in the image below.
Formulas
Star to delta
![](/shared/media/generated/13632da6d1e3.png)
![](/shared/media/generated/a130598932e9.png)
![](/shared/media/generated/44a3f384b3b1.png)
Delta to star
![](/shared/media/generated/69692beb6baf.png)
![](/shared/media/generated/8db8aa0d08c8.png)
![](/shared/media/generated/e022e95281c9.png)
R is the symbol for resistance and is measured in ohm (Ω).
![star delta transformation](/media/star-delta-transformation-circuit.png)