What is "phase rotation"?

Phase rotation refers to the order in which the voltages in a three-phase electrical system reach their peak values. This concept is crucial in ensuring that systems operate correctly and efficiently, especially when connecting motors and other three-phase devices. Each phase of the system is offset by 120 degrees in time, and the sequence in which these phases reach their maximum voltage affects the direction of rotation of motors and the overall balance of the load.

If the phase rotation is incorrect, it can lead to malfunctioning equipment, such as motors running in reverse, which could cause damage or operational inefficiencies. Therefore, recognizing the correct phase rotation is vital for any electrical technician working with three-phase systems. This understanding ensures proper operation and avoids potential hazards associated with miswired systems.