Delta & 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
VP = Phase Voltage
VL = Line Voltage
IP = Phase Current
IL = Line Current
R = R1 = R2 = R3 = Resistance of each branch
W = Wattage
WDELTA = 3 WWYE
WODELTA = ¾ WDELTA
WOWYE = ½ WWYE

3-Phase Delta 3-Phase Wye