Positive sequence refers to a balanced three-phase system in electrical engineering, where the voltages or currents are equal in magnitude and phase angle. This condition is essential for the efficient operation of electrical systems, as it ensures that the power is evenly distributed across all phases, minimizing losses and improving performance. In a positive sequence system, the phases are typically labeled as A, B, and C, with each phase separated by 120 degrees in phase angle. This balanced state is crucial for the proper functioning of equipment like motors and transformers, which rely on stable and consistent power supply for optimal operation.