Basic Theory
Three-Phase AC
Three-Phase AC Definition Composed of three AC sources with same frequency and phases 120° apart. Connection Methods Star Connection (Y) Delta Connection (△) Po…
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Three phaseWyeDeltaIndustrial power
Three-Phase AC
Definition
Composed of three AC sources with same frequency and phases 120° apart.
Connection Methods
Star Connection (Y)
Line voltage = √3 × Phase voltage
Line current = Phase currentDelta Connection (△)
Line voltage = Phase voltage
Line current = √3 × Phase currentPower Calculation
P = √3 × U × I × cos(φ)Phase Sequence
A-B-C-A (Positive sequence)
A-C-B-A (Negative sequence)
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