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Title:

Three-Phase Power

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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 ... – PowerPoint PPT presentation

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Provided by: RobertCH2
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Title: Three-Phase Power


1
Three-Phase Power
2
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

3
Phasor Diagram
4
Delta-Connected Sources
VLINE V?
5
Phasor Diagram, VAB as reference
6
Look at the Currents
I? ILINE / ?3
7
Y-Connected Sources
8
Phasor Diagram with A as reference
9
Complete Phasor Diagram
VLINE ?3V?
10
Look at the Currents
I? ILINE
11
Three-Phase Bridge Rectifier
12
Conduction Sequence
13
Average Output Voltage, Vdc
14
rms Output Voltage
15
Diode Currents
16
Transformer Secondary Current
17
Instantaneous Output Voltage
18
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