FN7-12DR type high-voltage AC load switch is a new gas producing indoor high voltage load switch. It applies to three phasealternating current power system of 50 Hz alternating current and rated voltage of 12kVto be used as breaking load current andclose short circuit current.
1. Ambient air temperature: upper limit : +40℃;lower limit : general region -10 , colder region -25 ;
2. Height above sea level: height above sea level should be 1000m or below.
3. Relative humidity, the daily average lower than 95%, the monthly average lower than 90%;
4. Ambient air should not be obviously contaminated by corrosive or flammable gases, water vapor and so forth;
5. Place where there is no frequently violent vibration.