Negative sequence refers to a condition in three-phase electrical systems where the phase currents or voltages are unbalanced. This imbalance can occur due to faults, such as a short circuit, or uneven loads on the phases. Negative sequence components can lead to overheating and damage in electrical equipment, particularly in motors, as they create a rotating magnetic field that opposes the normal operation. In power systems, negative sequence is an important aspect of power quality analysis. Engineers monitor negative sequence currents to ensure the reliability and efficiency of the system. By addressing negative sequence issues, utilities can improve the performance of transformers, generators, and other critical components in the electrical grid.