Regarding the common sense of the cooling tower, we may not understand it very well. Although it has been developed and used in the current situation of various occupations, it is not common in our daily life. The operation of the cooling tower is indispensable for the operation of the motor. What operating environment is there for the operation requirements of the cooling tower motor?

1. The maximum ambient air temperature varies with the seasons, but the d I type does not exceed 35 °C; the d II type does not exceed 40 °C; the ambient air minimum temperature is -15 °C.

2. The altitude does not exceed 1000m.

3. For the non-excavation working surface of the coal mine, the maximum relative humidity of the ambient air does not exceed 95%  and for the motor used in the factory, the maximum relative humidity  does not exceed 90%.

4. The cooling tower motor, which is used in the non-mining working face of the coal mine, is d I type. The maximum temperature of the surface of the factory with explosive gas mixture is 135 °C. Motor type is d IIBT4.

5. The rated voltage of the motor is 380V, 660V, 380/660V. The motor with power of 3kw and below is 380V.