A closer look: Winding protection device can prevent permanent damage to motor
There are a number of different types of winding protection devices used with motors. However, they all basically do the same thing; they sense a change from the normal operating temperature and either sound an alarm or take the motor off line when the specified temperature limit has been met or exceeded. Temperature protection is not limited to just large motors. A smaller motor that is critical to operation would be a good candidate for winding temperature protection if a failure would cause significant costs due to downtime.