1. Main Features     

ZW39-40.5 outdoor vacuum circuit breaker is widely used in AC 50 Hz, 40.5 kV three-phase power system. It is used to break rated current, fault current, or to switch electric lines, and thus realizes the controlling and protection of power system. It is capable of regular operation and also can be used as connecting circuit breaker.

2. Ambinent Conditions     

a）Ambinent Temperature      -50ºC ～+55ºC；     

b）Altitude                                 ≤3000m；     

c）Wind Speed                        ≤34m/s；     

d）Daily Range of Temperature                ≤25ºC；     

e）Sunlight                               ≤0.1w/cm；      

f）Average monthly humidity                     ≤90%；     

g）Earthquake Accelerated Speed         Horizontal ≤0.5g, Vertical≤0.33g；     

h）Ice thickness                     ≤10mm；      

i）Air pollution Level             ≤GB/T5582 Level IV；       

j）Application                         Outdoor