A three-phase system is an electrical power system that uses three alternating currents, each phase offset by 120 degrees. This configuration allows for a more efficient and stable power supply compared to single-phase systems. It is commonly used in industrial and commercial applications to power large motors and heavy machinery. In a three-phase system, the three currents can be combined to provide a constant power output, reducing fluctuations. This system can be connected in either a star (Y) or delta (Δ) configuration, affecting voltage and current distribution. Three-phase systems are essential for modern electrical grids and are widely used in renewable energy applications.