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Delta-Wye Conversions

These equations are used to transform a delta-connected set of resistances to a wye-connected (Y-connected) set of resistances.

Delta transformer winding drawing <===> Wye Y transformer winding drawing

R1 =	Rb·Rc Ra + Rb + Rc

R2 =	Ra·Rc Ra + Rb + Rc

R3 =	Ra·Rb Ra + Rb + Rc

Ra =	R1·R2 + R2·R3 + R3·R1 R1

Rb =	R1·R2 + R2·R3 + R3·R1 R2

Rc =	R1·R2 + R2·R3 + R3·R1 R3

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