What is the purpose of an overload protector in an electrical appliance?

The purpose of an overload protector in an electrical appliance is to prevent motor overheating by disconnecting power when the current exceeds a specified limit. In most electrical appliances, particularly those with motors, there is a risk of excessive current flow due to various factors such as mechanical failure, blockages, or increased load.

When the current is too high, it can generate excessive heat within the motor, potentially leading to damage, reduced efficiency, or even failure of the appliance. The overload protector serves as a safety device that monitors the current flowing through the motor. If the current surpasses a predetermined threshold, the overload protector activates, breaking the electrical circuit and cutting off the power supply to the motor. This proactive measure helps protect the appliance from overheating, preserving its lifespan and ensuring safety.

Other options, such as enhancing energy efficiency, improving the speed of the motor, or regulating voltage levels, do not accurately describe the primary function of an overload protector. It is focused solely on preventing damage from excessive current rather than altering the operational characteristics or efficiency of the appliance.