What is the minimum number of electrical degrees between the phases in a three-phase system?

In a three-phase electrical system, the phases are designed to be evenly spaced in order to produce a balanced load and efficient power transmission. The minimum number of electrical degrees between each of the phases is 120 degrees. This configuration ensures that the phases are spaced equally apart, which is essential for achieving a symmetric power flow.

When the phases are separated by 120 degrees, it allows for continuous power delivery as each phase reaches its peak output at a different point in time, thus optimizing the overall performance of the system. This separation is fundamental to the operation of three-phase systems, especially in motors and other electrical equipment that rely on the phase difference to function effectively.

The other options represent angles that do not correspond to the standard configuration of a three-phase system. For instance, a separation of 60 degrees would result in a configuration more typical of a two-phase system. Similarly, 90 degrees and 180 degrees do not provide the balanced advantages associated with three-phase systems, which makes 120 degrees the correct and standard choice.