This tool calculates the voltage imbalance for in a 3 phase system. Enter the three line voltage values Va, Vb and Vc.
Voltage unbalance occurs when the three-phase voltages differ in amplitude or are displaced from their normal 120° phase relationship, or both. This is shown in the picture below
If Va=Vb=Vc, there is no unbalance and the calculator gives 0%.
For the following values:
The average voltage is 208.33 V. The max deviation is 11.67 Volt and the voltage imbalance is 5.60%.