Delta and Wye Circuit Equations
Typical 3-Phase Wiring Diagrams and Equations for Resistive Heaters
Definitions
For Both Wye and Delta (Balanced Loads)
Wye and Delta Equivalent
V
P
= Phase Voltage
V
L
= Line Voltage
I
P
= Phase Current
I
L
= Line Current
R = R1 = R2 = R3 = Resistance of each branch
W = Wattage
W
DELTA
= 3 W
WYE
W
ODELTA
= ¾ W
DELTA
W
OWYE
= ½ W
WYE
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Accurate Imaging, Inc. 1999
