... transformer,DYN11 connection in high-voltage,low loss and noise,auto-restrain voltage,three-phase uninteract,well avoid ... grade is IP33.Normal Condition:1> Altitude Above Sea Level:<=1000m2> Ambient Temperature Highest Temperature:+45 Degrees Celsius ... of Monthly<=90%4>Earthquake Intensity:8 degree5>Defilement level:IIIThe Technical Parameter of ZGS11 Series American Transformer ...