电站用穿墙套管适用于35kV及以下电压等级的电站、变电所配电装置及电器设备中，供导线（母线）穿过接地隔板，墙壁及封闭配电机构中作为绝缘支持和外部导线（母线）连接用。
High pressure wall bushing of power station is suitable for up to and including 35 kv voltage grade of power plant, substation, power distribution equipment and electrical equipment, For lead (bus) through the ground plate, Walls and closed distribution agencies as support and external insulation wire (bus) in connection with.
（二）产品分类Product categories
电站用高压穿墙套管分为户内和户外两大类，有铜导体、铝导体及不带导体的母线式穿墙套管三种结构，并有普通型和耐污型两大类产品。
Wall bushingdivided into two big series: indoor and outdoor，Three kinds of structure with copper conductor and aluminum conductor and busbar wall bushing without a conductor，And have a regular and fouling resistance type two categories of products.
（三）产品制造依据Product manufacturing basis
高压穿墙套管性能符合GB12944.1-91《高压穿墙套管技术条件》、GB12944.2《高压穿墙套管尺寸与特性》的规定。
High pressure wall bushing Performance conforms to GB12944.1-91 High pressure wall bushing technology conditions and GB12944.2 High pressure wall bushing size and characteristics.
二、主要技术参数 Main technical parameters
（一）使用环境
1.户内套管Indoor bushing
a)环境温度不高于+40℃，不低于-40℃；
The environment temperature is ≤ + 40 ℃, ≥- 40 ℃
b)海拔不超过1000m;The altitude does not exceed 1000 m;
c)相对湿度月平均不大于90%；
The average ≤ 90% relative humidity;
d)周围空气应不受腐蚀性和可燃气体、水蒸汽等明显污秽；
Ambient air should not be obvious, such as corrosive and flammable gas, water vapor and filth.
e)无经常性的剧烈振动。No recurrent severe vibration.
2.户外套管Outdoor bushing
a)环境温度不高于+40℃，不低于-40℃；
The environment temperature is ≤ + 40 ℃, ≥- 40 ℃
b)海拔不超过1000m;The altitude does not exceed 1000 m;
c)风速不大于34m/s；Wind speed is not more than 34 m/s;
d)产品的使用环境的空气污秽程度，按GB5582分为0、Ⅰ、Ⅱ、Ⅲ、Ⅳ等五级；
Products using the environment air polluted degree, accord to GB5582 into 0, Ⅰ, Ⅱ, Ⅲ, Ⅳ;
e)无经常性的剧烈振动。No recurrent severe vibration.
（二）型号说明 Model specification
CWB—户外-户内圆导杆穿墙瓷套管Indoor-outdoor circular guide wall porcelain bushing；
CWC—户外-户内穿墙瓷套管Indoor-outdoor wall porcelain bushing；C—抗弯破坏负荷等级Bending failure load level，12kN（加强型enhanced）。
CWL—户外-户内铝导体穿墙套管Indoor-outdoor aluminum conductor wall bushing