Which of the following is a function of temperature sensing in electronic overload relays?

Temperature sensing in electronic overload relays plays a crucial role in the protection of motors by preventing overheating. When motors operate, they generate heat due to electrical resistance and mechanical friction. If the temperature exceeds safe limits, it can lead to insulation breakdown, bearing failure, or even complete motor burnout.

By incorporating temperature sensors, electronic overload relays can continuously monitor the motor's temperature. If the temperature rises to a predetermined threshold, the relay can interrupt the power supply to the motor to prevent damage. This proactive approach helps ensure the longevity and reliability of the motor, maintaining optimal performance and protecting the entire system from potential failure.

The other options, although they may relate to electrical systems in various contexts, do not pertain directly to the specific function of temperature sensing in electronic overload relays. For instance, enhancing battery life and optimizing electrical efficiency are more related to other aspects of electrical design and operation rather than the thermal protection of motors. Similarly, measuring ambient temperature is not the primary concern of overload relays; these devices focus on the temperature of the motor itself to mitigate overheating risks.