12KV Embedded Poles Type High - voltage vacuum circuit breaker is a three - phase AC 50Hz rated voltage 12kV indoor switch equipment of power system . It is used as the protection and control unit of power grid equipment and power cquipment of industrial and mining enterprises . It is suitable for frequent operation under rated operating current or for short circuit current .
Environmental conditions
Ambient air temperature : upper limit +40℃. Lower limit -15℃ ;
Altitude : less than 1000m( for higher altitude , is rated insulation level increase );
Amplitude of vibration: the earthquake intensity is not more than 8 degrees ;
The daily average value of air relative humidity is not greater than 95%,
and the average monthly value is not greater than 90% ;
No Fire , explosion , danger , serious pollution , chemical corrosion and violent vibration .
Executive Standard
GB1984 AC High Voltage circuit breaker
DL/T403 12~40.5KV Indoor AC high voltage circuit breaker ordering technical conditions
IEC60694
IEC6227-100
