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Delta-Star or Delta-Y Transformation Calculator

Standard 3 phase circuit can have different topologies, but most common are delta Δ (sometimes also called triangle or pi) and star (sometimes also called Y, T or wye) topology, both given in figure bellow.


Given 3 phase network can be transformed from delta to star and vice versa. Impedances between points A and B, B and C and C and A has to be preserved. Impedances are follows:


By solving above set of equations for ZA, ZB and ZC, delta-star transformation is obtained, and delta-star transformation calculation is:


With delta-star transformation, 3 phase circuit is transformed from delta to star topology with equivalent impedance.

Delta-Star or Delta-Y Transformation Calculator

External links:

Delta-Star Transformation on Electrical4u
Delta-Star Transformation on Wikipedia
Delta-Star Transformation on electronics-tutorials

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