In a three-phase electrical system, what is the phase difference between any two phases?

In a three-phase electrical system, each phase is separated by a phase difference of 120 degrees. This results in a balanced system where the sum of the currents in the three phases at any given instant is zero, ensuring a more efficient and stable power delivery.

The 120-degree phase separation allows the phases to distribute power evenly over the cycle, which is particularly useful in industrial applications where motors and other equipment can run more smoothly and efficiently. This is a fundamental characteristic of three-phase systems, and it helps to minimize the amount of power lost and reduces the potential for overheating in the conductors.

Each phase reaches its peak voltage at different intervals, specifically every 120 degrees of electrical rotation. The implication of this phase relationship creates a continuous flow of power rather than a pulsating flow, which is seen in single-phase systems.

Overall, the phase difference of 120 degrees between the phases is essential for the operational efficiency and smoothness of a three-phase electrical system, making it the correct answer.