In power systems, an unbalanced load occurs when the load connected to each phase of a three-phase transformer is unequal, resulting in a non-zero neutral current. A balanced load, conversely, means that each phase carries an equal load, maintaining system stability. This imbalance can also affect distribution transformers, leading to efficiency losses and potential equipment damage. Understanding load balance is crucial for optimizing power system performance. Proper management of load distribution helps ensure reliability and efficiency in electrical systems.