Normal use conditions
◆Ambient air temperature: upper limit +40°C, lower limit - 40°C;
◆The relative humidity of the air: the daily average is not more than 95%, and the monthly average is not more than 90%;
◆Wind pressure: no more than 700Pa (equivalent to wind speed of 34m/s)
◆Pollution level: IV (the creepage distance ≥31mm/kV);
◆Icing thickness: ≤10mm;
◆Installation site: There should be no fire, explosion hazard, serious pollution, chemical corrosion and severe vibration.