The transformation is used to establish equivalence for networks with 3 terminals. Where three elements terminate at a common node and none are sources, the node is eliminated by transforming the impedances. For equivalence, the impedance between any pair of terminals must be the same for both networks. The equations given here are valid for real as well as complex impedances.
Equations for the transformation from Δ-load to Y-load 3-phase circuit
The general idea is to compute the impedance Ry at a terminal node of the Y circuit with impedances R', R'' to adjacent nodes in the Δ circuit by
Equations for the transformation from Δ-load to Y-load 3-phase circuit
where RΔ are all impedances in the Δ circuit. This yields the specific formulae
Equations for the transformation from Y-load to Δ-load 3-phase circuitThe general idea is to compute an impedance RΔ in the Δ circuit by
where RP = R1R2 + R2R3 + R3R1 is the sum of the products of all pairs of impedances in the Y circuit and Ropposite is the impedance of the node in the Y circuit which is opposite the edge with RΔ. The formulae for the individual edges are thus
1 Comment:
Subscribe to:
Post Comments (Atom)
Power Transformers in India | Transformer Manufacturer in India