Chapter 7, Problem 1RQ

To determine

The number of degrees by which, the voltages of a three phase system are out of each other.

Explanation of Solution

Given:

The number of phases of the system $\left(n\right)$ is $3$.

Calculation:

The below figure represents the three phase system.

Figure-(1)

Calculate the number of degrees $\left(\theta \right)$.

  $\begin{array}{c}\theta =\frac{360°}{n}\\ =\frac{360°}{3}\\ =120°\end{array}$

Thus, the number of degrees between the phase with each other of a three phase system is $120°$.