What does phase rotation refer to in a three-phase system?

Phase rotation in a three-phase system relates specifically to the sequence of voltage peaks. In such systems, the three phases are designated as A, B, and C. The voltage of each phase rises and falls in a specific order, creating a rotational effect that is crucial for the proper operation of three-phase motors and other electrical equipment.

Understanding the sequence of voltage peaks is essential because it determines how the phases interact. For example, if the phases do not rotate in the expected order, it can cause motors to run in reverse, leading to potential operational issues or damage. Correct phase rotation ensures that motors start and run in the intended direction, maximizing efficiency and performance.

The other choices do not accurately capture the concept of phase rotation. The frequency of the current supplied refers to the number of cycles per second and does not relate to the order of the voltage peaks. The voltage range of the system indicates the levels of voltage present but does not describe the sequence. Overall power consumption relates to how much power the system draws and is separate from the topic of voltage phase sequences.