... ) kV 2. frequency (15 ~ 60) Hz 3. three phase Product Description and Usage: An overview of the - CM, CMW, the CME, the ... flammable gas, water, steam, and so obviously dirtyRecurrent severe vibration 2) Outdoor casingThe ambient temperature is not higher than +40 °C ... .1 voltage ceramic wall casing technical conditions. CM, CMW, the CME, the CMD busbar type wall bushing (high-voltage wall bushing)