Special Requests For Cooling Tower Motor
Cooling tower motor is a special kind of motor, especially the top internal installation structure of countercurrent cooling tower. The cooling tower motor has been exposed to high temperature and humidity for a long time (the relative humidity is 100%).
1. The cooling tower motor has high altitude problems. Cooling towers in high altitude areas must be equipped with high altitude motors. Please note that the height of the general motor does not exceed 1000 meters. Those above this height require additional options.
2. Chemical companies, food and oil companies also have requirements for explosion-proof grade and corrosive gas; they all need to consider them together.
3. Cooling more than 185KW cooling tower motor also involves working efficiency. Generally, high voltage (6kV) motors are used to provide overall efficiency. Total cost (low voltage (380V) motor includes line loss power and supporting low voltage electrical cabinet, etc.).
4. Fully enclosed structure, cooling tower motor shell, with reinforced ribs, protection grade IP55. The anticorrosion grade of motor junction box is IP56. Insulation class F. Class B temperature rise!
Some motors have forced cooling fans at the end. On the premise of meeting the above requirements in general, there are two cases:
1. The motor without cooling fan should be preferred for the counter current overhead cooling tower. The reason is that the motor with forced cooling fan is easy to corrode in the humid and hot environment of cooling tower. Once the cooling fan is damaged, the overall cooling performance will be reduced.
2. However, when the cooling tower motor is arranged outside the air duct of the tower, an additional protective auxiliary cover is usually designed to protect the whole motor from the weather. Since it is installed outside the cooling tower, the operating environment of the motor is usually not 100%. High temperature and humidity. In this way, the forced cooling fan is more reliable, because in this case, the cooling fan is not easy to be corroded, thus greatly improving the cooling performance of the motor!