In AC circuits, what angle is noted for determining phase differences between multiple phases?

In AC circuits with three-phase systems, the phase differences between each of the phases are typically set at 120 degrees. This configuration allows for the efficient distribution of electrical power.

The reason for using a 120-degree phase shift is that it evenly divides the complete circle of 360 degrees into three equal parts. Each phase becomes separated by that equal angle, which is critical for ensuring that the electrical loads can be balanced across the three phases, promoting stability in the power supply and minimizing the risk of overloads or imbalances.

In practical terms, having phases spaced at 120 degrees means that at any given time, one phase is reaching its peak voltage while the others are either rising to or falling from their peaks. This timing ensures that power is consistently delivered, as there is always at least one phase that is providing energy to the load. This phase difference, therefore, is key to maximizing the efficiency of the system and minimizing voltage drops and losses.

The other angles, such as 90 degrees and 180 degrees, are not utilized in the context of three-phase systems. For example, a 90-degree separation would be relevant in certain two-phase systems, but it does not apply here. Similarly, 180 degrees would denote an opposition of