Three-Phase Power.

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Presentation transcript:

Three-Phase Power

Definitions 4 wires Color Code 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 VLINE = V

Phasor Diagram, VAB as reference

Look at the Currents I = ILINE / 3

Y-Connected Sources

Phasor Diagram with A as reference

Complete Phasor Diagram VLINE = 3V

Look at the Currents I = ILINE

Three-Phase Bridge Rectifier

Conduction Sequence

Average Output Voltage, Vdc

rms Output Voltage

Diode Currents

Transformer Secondary Current

Instantaneous Output Voltage

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