Which of the following is a primary function of overcurrent protection?

The primary function of overcurrent protection is to prevent equipment overheating. Overcurrent protection devices, such as circuit breakers and fuses, are designed to interrupt the flow of electrical current if it exceeds a predetermined level, which helps to safeguard electrical equipment from damage that can occur due to excessive heat generated by high currents. When an overcurrent condition occurs, these devices act quickly to disconnect the power, thereby reducing the risk of thermal damage to conductors and connected devices, which can lead to fires and equipment failure. This protective mechanism is crucial for the safety and reliability of electrical systems.

The other options, while relevant to electrical systems in various contexts, do not specifically relate to the core purpose of overcurrent protection. Managing voltage variations pertains more to voltage regulation devices, enhancing power quality relates to systems designed to ensure the reliability and stability of power supply over time, and maintaining energy efficiency involves strategies that minimize waste in electrical systems.