What are the two functions or duty classifications of motors?

The classification of motors into continuous-duty and intermittent-duty is fundamental in understanding how they operate under different conditions. Continuous-duty motors are designed to work for extended periods without interruption, making them ideal for applications where constant operation is necessary, such as in pumps or fans. They can handle a defined load indefinitely without overheating.

On the other hand, intermittent-duty motors are designed for applications where the motor operates for short bursts of time, allowing for rest periods in between. This classification is vital for applications that require motors to start and stop frequently, such as in conveyor systems or cranes. Understanding these duty classifications helps in selecting the right motor for a specific application, ensuring efficiency and reliability in operation.