What is the role of the internal blower in a load bank?

The internal blower plays a crucial role in the operation of a load bank by removing heat from the load bank resistor elements. During the testing process, resistors generate significant heat due to the conversion of electrical energy into thermal energy. If this heat is not adequately dissipated, it can lead to overheating, which could damage the components and affect the accuracy and reliability of the load bank's performance.

By utilizing an internal blower, the load bank effectively circulates air over the resistor elements, facilitating heat transfer away from the components and towards the external environment. This active cooling mechanism ensures that the load bank operates within safe temperature limits, thereby extending the life of the equipment and maintaining proper functioning during testing sessions. The significance of this cooling function underscores why the removal of heat is paramount in the design and operation of load banks.