Given the values of formula_17, formula_18 and formula_19 from the Δ configuration, we want to obtain the values of formula_20, formula_21 and formula_22 in the equivalent Y configuration. In order to do that, we will calculate the equivalent impedances of both configurations in "N""N", "N""N" and "N""N", supposing in each case that the omitted node is unconnected, and we will equal both expressions, since the resistance must be the same.
The resistance between N and N when N is not connected in the Δ configuration is

In the Y configuration, we have

By similar calculations we obtain

and

The impedances for the Y configuration can be derived from these equations by adding two equations and subtracting the third. For example, adding (1) and (3), then subtracting (2) yields

and hence

and

Δ-लोड से Y-लोड में परिवर्तन के समीकरण
प्रदर्शन
आधारभूत Y-Δ परिवर्तन
ग्राफ सिद्धान्त (Graph theory)