A three-phase system is a method of electrical power distribution that uses three alternating currents, each set 120 degrees apart in phase. This configuration allows for a more efficient and stable power supply, making it ideal for industrial and commercial applications. It can deliver more power using less conductor material compared to single-phase systems. In a three-phase system, the three currents can be combined to create a constant power flow, reducing fluctuations and improving performance. This system is commonly used in large motors, transformers, and other heavy machinery, providing a reliable energy source for various applications in industries like manufacturing and construction.