What is one advantage of a 3-phase system over a single-phase system?

A 3-phase system provides more efficient power transmission compared to a single-phase system due to several key factors. In a 3-phase system, power is delivered continuously, as the three phases reach their peak values at different times, resulting in a smoother and more constant flow of energy. This helps to minimize the fluctuations in power supply, which can be especially beneficial for heavy loads and industrial applications.

Additionally, because a 3-phase system can deliver more power than a single-phase system with the same amount of current, it allows for smaller and more efficient conductors, which reduces energy losses in the form of heat. This efficiency translates to lower operational costs and improved system reliability. Furthermore, three-phase motors are generally smaller and more efficient than their single-phase counterparts, providing better performance and longer lifespan.

In contrast, the other options do not accurately represent advantages of a 3-phase system. For instance, lower power delivery and operation at a lower voltage level do not highlight the strengths of a 3-phase arrangement, while fewer conductors actually correlates more with single-phase systems, where one or two conductors are sufficient for power transmission.