In the following picture, it shows that a black box at right. the circuit inside the black box is a 3 phase load balanced delta connection circuit. the line voltage of it is 500V and the power factor of it is 0.8 lag. then, I wanna get the voltage difference between A and B.
In the second picture, it shows the formula to get voltage wanted. However, I don't know why that there is a 3^(1/2) inside the formula. Can someone help me?
BTW, don't use the trick to change the delta circuit to star connection circuit. even though I know that it will be much easier to get the answer. I just wanna know how to get the voltage between A and B by delta connection.