Delta and Wye Circuit Equations
Typical 3-Phase Wiring Diagrams and Equations for Resistive Heaters
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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 |
Equations
| 3-Phase Wye (Balanced Load) | 3-Phase Open Wye (No Neutral) |
|---|---|
|
IP = I L |
IPO = I LO |
| 3-Phase Delta (Balanced Load) | 3-Phase Open Delta |
|
IP = I L/1.73 |
VP = VL |
