2.Environment temperature between -40¡æ and +40¡æ
3. Altitude does not excess 3000m
4. Rlative humidity is not more than 95% (25¡æ)
5.Power grid frequency: 58¡«62Hz(60Hz system)¡¢48¡«52Hz(50Hz system)
6.No corrosive gas or stem and no explosive dust on installation site.