Description

AEW– ZN73A-12 indoor high voltage permanent magnet vacuum circuit breaker is suitable for three-phase, Ac50Hz with 12KV rated voltage. lt can provide control and protection for industrial and mining enterprises, power plants and substations, and electrical facilities. Equipped with permanent magnet operating mechanism developed by our company. For its high reliability and long life, it is especially suitable for the places with bad conditions for example under frequent operation and frequent breaking of short circuit current.

APPLYING AMBIENT CONDITIONS

1. Ambient temperature: -30°C~+40°C.
2.  Relative humidity: the average humidity of a day should be no more than95%.The average humidity of a month should be no more than 90%.
3. Earthquake intensity: not exceed 8 degrees.
4. Saturated vapor pressure: the average pressure of a day should be no more than 2.2kPa; the average pressure of a month should be no more than1.8Kpa.
5. The height above sea level: ≤ 1000 m (Except special requirements).
6. It should be installed in the places without fire, explosion, serious filth,and chemical erosion and violent vibration.