ERFA Industries Group
ERFA Industries Group Xian ERFA Switchgear under ERFA Industries Group
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ZN73 vacuum breaker breakers /swithgear
Description
ZN73A-12series permanent magnet-type indoor high voltage vacuum circuit breaker is a three-phase AC 50Hz,rated voltage of 12kV indoor switchgear.
Our company with its own research and development of permanent magnetic actuator for industrial and mining enterprises, power generation and substation facilities as electrical control and protection purposes. The product has high reliability and long life characteristics, especially suitable for frequent operation, repeatedly breaking conditions,such as short-circuit current of the place.
Applying ambient conditions
1. Ambient temperature:-15ºC~+40ºC.
2. Ambient humidity:the average humidity of a day should be no more than 95%;the average humidity of a month should be no more than 90%.
3. Earthquake intensity:not exceed 8 degrees.
4. Saturated vapour pressure:the average pressure of a day should be no more than 2.2kPa;the average pressure of a month should be no more than 1.8kPa.
5. The height above sea level:1000m(besides the special requirements).
6. It should be installed in the places without fire,explosion,serious filth,chemical erosion and violent vibration.
