ZN85-40.5(3AV3) vacuum circuit breaker
      ZN85-40.53AV3Indoor high voltage vacuum circuit breaker rated voltage 40.5KV,three-phase AC 50Hz,It is used to protect and control electrical equipment in the industrial & mineral enterprise, power plant and substation as well as to switch in frequent in the operation places. This products conforms to the national standard GB1984/JB3855 /DL402.IEC600656High-voltage alternate current circuit breaker. And the product  has passed the test of high voltage electric quality monitoring center. 
 Service Environment  
      Environmental temperature is from:-15~40°C;
      Environmental humidity: 
      Daily average of relative humidity≤95%
      Daily average saturated vapor pressure≤2.2×10-3Mpa
      Monthly average of relative humidity≤90%
      Monthly average saturated vapor pressure≤1.8×10-3Mpa
      Keep away from such environment as subject to dust, dirt, smog, corrosive/flammable gas, vapor and salt pollution.