Outdoor Cased Ring Net Cabinet (XGW series) 1,Scope of application This series Cased Ring Net Cabinet are applied in three phase power system at AC 50HZ, 12KV voltage. They works to supply power to the electric wire, radiation type power supply and overload redistribution. 2,Working condition 2.1 Ambient temperature: upper limit +40°C, lower limit -40°C;2.2 Altitude: no exceeding1000m (the rated insulation level should be proved with the rise of altitude);2.3 Wind pressure: no exceeding 700Pa(equivalent of wind speed 34 m/s);2.4 Earthquake intensity: no exceeding 8 degree.2.5 Pollution class: class 42.6 Relative humidity: no exceeding 95% in daily average of relative humidity. No exceeding 90%in monthly average of relative humidity.2.7 No frequency intense shaking or all years long cauterization places.