Electric Hoist control box working conditions: 1. The height is not more than 2500 meters above sea level; 2. The ambient air temperature is 20 ℃ ~ + 40 ℃; 3. The air relative humidity: the lowest average humidity is 90%, at the same time, the average minimum temperature of 25 ℃ of the month, and considering the because of temperature change on the product surface coagulate frost; 4. The workplace should be free of shaking and vibration; 5. In the absence of explosion danger medium, no corrosive action on metals, and destruction of insulators and medium of gas and dust (including conductive dust); 6. Where there is no rain and snow hit (except rain control box).