The service factor of a motor indicates how much the motor may be overloaded when operating at its rated potential difference and ____________.

The service factor of a motor is a crucial parameter that indicates the motor's ability to handle overloads under specific operating conditions. When a motor operates at its rated potential difference, the service factor provides guidance on how much additional load the motor can manage safely without risking damage or reduced lifespan.

In this context, the correct answer focuses on the motor's ability to perform at a given frequency. Frequency is significant because it influences the speed at which the motor operates; altering the frequency affects the motor's torque and overall performance. If the frequency deviates from the rated specifications, the motor's efficiency and capacity to handle additional loads may be compromised.

Operating a motor at an incorrect frequency can lead to overheating, inefficient operation, or even mechanical failure. The service factor thus serves as a reminder to operators about the safe limits concerning load and frequency, ensuring that the motor maintains its efficiency while accommodating possible overloads under normal conditions.