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Three-Phase Power. Definitions. 4 wires 3 “active” phases, A, B, C 1 “ground”, or “neutral” Color Code Phase A Red Phase B Black Phase C Blue Neutral White or Gray. Phasor Diagram. Delta-Connected Sources. V LINE = V . Phasor Diagram, V AB as reference. Look at the Currents.
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Definitions • 4 wires • 3 “active” phases, A, B, C • 1 “ground”, or “neutral” • Color Code • Phase A Red • Phase B Black • Phase C Blue • Neutral White or Gray
Delta-Connected Sources VLINE = V
Look at the Currents I = ILINE / 3
Complete Phasor Diagram VLINE = 3V
Look at the Currents I = ILINE