12kV ZW20-12 Type of Outdoor High Voltage Vacuum Circuit Breakers

Environmental conditions:

1. Ambient temperature: not higher than +40°C , not lower than -40°C
2. Air relative humidity: day average no greater than 95%, on average less than 90%; 
3. The altitude does not exceed 2000 m;
4. Wind pressure not more than 700 Pa (equivalent to wind speed 34 m/s); 
5.  Seismic intensity not more than eight level; 
6.  No  fire, explosion, serious  filthy, chemical corrosion and violent  vibration of places. 
7.  If  the customers have other special  requirements, can be  in order to put forward, our company can offer most satisfied.

The main technical parameters:

ZW20-12 Type outdoor boundary of vacuum circuit breaker