What is the main advantage of three-phase power over single-phase power?

The main advantage of three-phase power over single-phase power is that it allows for a more stable and efficient power delivery. In a three-phase system, power is delivered continuously, as the current in each phase reaches its peak at different times, resulting in a more constant and reliable flow of electricity. This stability reduces the fluctuations in voltage and current that can occur in single-phase systems, providing a smoother operation for motors and other equipment that require a consistent power supply.

Additionally, three-phase systems can deliver more power with a smaller conductor size compared to single-phase systems, leading to improved efficiency in energy transmission and reduced energy losses. This efficient power delivery makes three-phase systems ideal for industrial and commercial applications where high power and reliability are necessary.

While other options touch on aspects of electrical systems, they do not encapsulate the principal advantage of three-phase power, which lies in its stability and efficiency in delivering electrical energy.