How many degrees exist between phases in a three-phase electrical system?

In a three-phase electrical system, the phases are spaced evenly around the circle of a waveform. This configuration allows for a balanced load and efficient energy transfer. The phases are typically separated by an angle of 120 degrees. Each phase represents one third of the full circle, which is 360 degrees.

By distributing the phases at 120-degree intervals, the system achieves a consistent flow of power, minimizing fluctuations and enhancing the stability of the electrical supply. This arrangement is fundamental to three-phase power systems, which are widely used in electrical distribution due to their efficiency and ability to power large motors and heavy loads.

The other options represent angles that do not correspond to the standard spacing in a three-phase system. For example, 90 degrees would not allow for equal power distribution, while 180 degrees represents a completely opposite phase, and 360 degrees completes a full circle rather than indicating the angular separation between the phases. Hence, the correct understanding of the angle of separation in three-phase systems is critical for designing and maintaining such electrical networks effectively.