The star-delta transformation, also known as the delta-star
transformation or the delta-star equivalence, is a technique used in
electrical engineering to simplify and analyze complex electrical
circuits. It involves the conversion of a circuit from a delta (Δ)
configuration to a star (Y) configuration, or vice versa. This
transformation is particularly useful when dealing with three-phase
electrical systems.
In a three-phase system, you have three voltage sources or loads connected in one of two configurations: delta or star.
Delta (Δ) Configuration: In a delta configuration, each element (resistor, inductor, or capacitor) is connected between two phase terminals in the shape of a triangle (Δ). The voltage across each element is the line voltage, and the current through each element is the phase current.
Star (Y) Configuration: In a star configuration, each element is connected between one of the phase terminals and a common point, often called the neutral point. The voltage across each element is the phase voltage, and the current through each element is the line current.
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