Electric motor thermal protection switch

18AMseries thermal protector is an automatic temperature recovery device. It isinstalled in series with the motor coil. Therefore, the thermal protector willrespond to the temperature change and motor current. The heat caused bytemperature and current raise will transmit to bimetallic element. Once thepreset temperature is reached, the bimetallic element will react and makecontactor cut off. Then the circuit will be cut off. Once the motor temperaturedecreases to the rated recovery temperature, bimetallic element will recover tothe initial station. Then the contactor will close and the circuit willreconnect.

Temperature specification

Open temperature: 50~150±5℃, one gear per 5℃

Reset temperature: it is 2/3 of standardopening temperature or specified by customers. The tolerance is 15℃.

Contact capacity

They are applicable for more than 5000 cyclesunder following condition.

Notice:

The thermal protector can notsustain heavyimpact during working.

The word side is the temperature sensingsurface.