Detailed Product Description Electrical circuit breakerDZ20 series is suitable for turn-on or turn- ... should go through power line from 1,3,5.The products comply with the IEC60947-2, GB14048.2, JB8589-1997 standards ... 50% in the ambient temprature of +40centigrade.Pollution grade:3Install category:3, but 4 when lnm more than 800AMain technical specifications ...