The working principle of the temperature switch is to automatically sample and monitor the ambient temperature through the temperature sensor. When the ambient temperature is higher than the control set value, the control circuit is started, and the control hysteresis can be set. If the temperature is still rising, when the temperature rises to the set over-limit alarm temperature point, the over-limit alarm function is activated.

When the controlled temperature cannot be effectively controlled, in order to prevent the device from being damaged, the device can be stopped by the function of tripping. It is mainly used in various high and low voltage switchgears, dry-type smashers, box-type power stations and other related temperature applications used in the power sector.