Which of the following describes what happens in a perfectly balanced three-phase system?

In a perfectly balanced three-phase system, there is an equal distribution of current across all three phases. This balance means that the current in each phase is of equal magnitude and is equally spaced in time. The currents reach their peak values at equal intervals, which ensures that the total current flowing in and out of the system is constant and does not fluctuate. This balance is crucial for the efficient operation of three-phase motors and allows for the optimal transfer of electrical power, minimizing losses and improving system stability.

The conditions of a perfectly balanced system lead to an overall neutral point where the sum of the currents is zero, enhancing the effectiveness of the distribution network. A balanced system also allows for the greatest efficiency in power consumption, as imbalances can lead to unnecessary losses and instability in electrical systems.

In contrast, imbalances in line currents, zero power consumption, and differences in phase relationships characterize situations that deviate from perfect balance, which can cause various operational challenges within the electrical network.