概述summarize

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 bushing divided 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.

由于产品较多，为便于用户查询，将产品分别分类介绍。其中又将耐污型系列分为爬电比距2.0cm/kV以下和2.5cm/kV以上两类。特别推荐爬电比距2.5cm/kV和3.1cm/kV产品，不仅户外端耐污性能高，而且尽可能地加大了户内端的爬电比距，以防止因凝露等原因造成闪络。

Because the product is more, for ease of user queries, the product classification is introduced respectively. Fouling resistance type series can be divided into two types of Creepage distance ≤2.0cm/kV and ≥2.5cm/kV. Particularly recommended creepage distance 2.5 cm/kV and 3.1 cm/kV products. Not only outdoor side fouling resistance is high, but also increased than indoor the creepage distance as far as possible, in order to prevent the flashover caused by condensation, etc.

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.

四、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.

五、型号说明 Model specification

C——户内铜导体穿墙套管Indoor copper conductor wall bushing；

CW——户外-户内铜导体穿墙套管Indoor-outdoor copper conductor wall bushing；

CB——户内圆导杆穿墙瓷套管Indoor circular guide wall porcelain bushing；B—抗弯破坏负荷等级Bending failure load level，8kN（加强型enhanced）。
 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）。

CL——户内铝导体穿墙套管Indoor aluminum conductor wall bushing；
CWL——户外-户内铝导体穿墙套管Indoor-outdoor aluminum conductor wall bushing；
CLB——户内铝导体穿墙套管Indoor aluminum conductor wall bushing（加强型enhanced）；

CWLB——户内-户外铝导体穿墙套管（加强型enhanced）Indoor-outdoor aluminum conductor wall bushing
CWW——户外-户内耐污型铜导体穿墙套管Indoor-outdoor antifouling type copper conductor wall bushing；
CWWL——户外-户内耐污型铝导体穿墙套管Indoor-outdoor antifouling type aluminum conductor wall bushing；

CWWLB——户外-户内耐污型铝导体穿墙套管（加强型enhanced）Indoor-outdoor antifouling type aluminum conductor wall bushing；
 CM——户内母线穿墙套管Indoor busbar wall bushing；
 CMW——户内-户外母线穿墙套管Indoor-outdoor busbar wall bushing；
 CMWW——户外-户内耐污型母线穿墙套管Indoor-outdoor antifouling busbar wall bushing；

 字母后数字为设计顺序号After the letter digital serial number for a design。
  例type example： CWWL-35/630-3
系35kV电压、630A电流、户外-户内耐污型铝导体穿墙套管，适用于3级污区。

System of 35 kV voltage, the current 630A, indoor and outdoor fouling resistance type aluminum conductor wear casing wall, suitable for level 3 polluted.
  例type example： CWWL-35/630-1-G
系35kV电压、630A电流、户外-户内高原耐污型铝导体穿墙套管，适用于1级污区。

35 kV voltage system, current 630A , indoor-outdoor plateau fouling resistance type aluminum conductor wall bushing, suitable for level 1 polluted area.
  例type example： CWWB-35Q/630
系35kV电压、630A电流、大爬距铜导体穿墙套管。

System of 35 kV voltage, the current 630 A, the high creepage distance copper conductor wall bushing.

六、穿墙套管技术参数Wall Bushing Technical parameters

No.	Device name				35kV AC HV Aluminum Conductor Wall Bushing
1	Type				CWWL-40.5/2500A-4
2	The rated voltage（kV）				35
3	Highest voltage for equipment Um（kV）				40.5
4	Rated current（A）				2500
5	Rated frequency（Hz）				50 or 60
6	Thermal stability of current (Valid values)/time of duration				40kA/3s
7	Full wave impulse voltage（peak）（kV）				235
8	1min dry power frequency withstand voltage(Valid values)（kV）				111.5
9	1min wet power frequency withstand voltage (Valid values)（kV）				95
10	average diameter(Wall hole)(mm)				260
11	working life(year)				≥30
12	Casing	Specific Distance of Creepage		mm/ kV	Outdoor ≥31
					Indoor ≥25
		Dry arcing distance		mm	≥400
		Creepage distance/dry arcing distance			≤4.0
13	Terminal mechanical strength	Random direction		N	1250
		Actual total load		N	≤ 50% of the dynamic loading
		Extreme dynamic loading		N	A static load of 1.4 times
16	Bending resistance load			N	7500
17	Insulation material				Porcelain bushing
18	Electrical conductor		material		Aluminum
			specifications		1 Piece 40×8

七、特点及结构简介 Characteristics and structure

套管由瓷套、安装法兰及导电部分装配而成，母线穿墙套管不带导电部分。瓷套与法兰固定方式，除35kV高原型以及部分耐污型产品采用机械卡装外，其余均用水泥胶合剂胶装；铜质电杆采用定心垫圈和螺母固定，铜、铝导电排采用定心垫圈和开口销固定。对母线穿墙套管所带安装用夹板，出厂时未加工开口尺寸，以便用户根据实际选用的母线规格型式自行确定开口尺寸。瓷件表面一般上棕釉。安装法兰一般采用灰铸铁，但电流等级为1500A及以上产品的法兰、端帽及定心垫圈采用硅铝合金，以降低套管在长期工作下的发热温度。各种黑色金属附件表面涂灰磁漆。

Wall bushing by porcelain bushing, installation of flange and conductive parts assembled, bus wear casing wall without conductive parts. Porcelain jacket with flange fixed way, in addition to the 35 kv plateau type and some of the fouling resistance type product adopts mechanical card is installed outside, the rest are in cement cement binding; Copper pole adopts fixed centering washers and nuts, copper, aluminum conductive row by centering washers and splint fixation. On the bus wall casing with installation with plywood, unprocessed opening sizes in the factory, so that the user selected according to actual bus types to determine the opening size. Generally the brown glaze porcelain surface. Installation of flange generally USES the gray cast iron, but the current level of 1500 a and above products of the flange, end cap and centering washers use silicon aluminum alloy, to reduce the fever of casing under the long-term working temperature. All kinds of enamel coating ash black metal accessories.
　　为了提高套管的起始电晕，对20和35kV套管在结构上采取均压措施，将靠近法兰部位的瓷套及两边的伞（棱）适当加大、加厚，在瓷件焙烧前于瓷套内腔和法兰附近以及靠近法兰的第一个伞（棱）上均匀涂上一层半导体釉，经焙烧后使半导体釉牢固地结合在瓷壁上，并通过接触片使导体与瓷壁短路，这样就大大改善了电场分布，防止套管内腔发生放电，提高滑闪放电电压。以往对20和30kV套管内腔和法兰处采用喷铝层来改善电场分布，运行证明铝层易于剥落，往往不起作用，改用上半导体釉后克服了喷铝的缺点。

In order to improve the casing starting corona, of 20 kv and 35 kv casing equalizing measures taken in the structure, porcelain sets that are close to the flange parts and the umbrella (edge) on both sides of the appropriate increase, thickening, in front of the porcelain roasting near a porcelain set inside cavity and flange and close to the flange of the first umbrella (edge) evenly coated with a layer of semiconductor glaze, after roasting make semiconductor glaze combined tightly in porcelain wall, and through the contact piece make short circuit conductor and porcelain wall, thus greatly improve the electric field distribution, prevent the casing cavity discharge, improve flash discharge voltage. Past of 20 kv and 30 kv casing cavity and flange adopt aluminum layer to improve the electric field distribution, the running proved flaky aluminum layer, often don't work, after the switch to on semiconductor glaze overcomes the drawback of aluminum.
　　套管导电部分，过去只采用铜导体。由于铜材价格较贵，同时电材部分亦普遍使用铝导体，因此，通过试验研究发展了铝导体产品系列。采用铝导体后不但可节省大量铜材，还可节省需经特别加工的铜铝过渡端子，相应降低了产品成本；从性能来说，由于铝导体与母线连接的导电接触面积比原有铜导杆大，克服了以往铜导杆接触面积太小而产生温升过高的缺点。我厂整个穿墙套管系列产品主要系铝导体，手册中仍保留3、10、35kV级400～1500A带螺母的圆铜导电杆穿墙套管，供维修使用。供特需的2000A铜导体穿墙套管，我厂已发展四孔板抱紧式端子结构，运行可靠。 套管接线端子的尺寸规格符合GB5273《变压器、高压电器和套管的接线端子》 的规定，可保证互换。

Bushing conductive parts, use only copper conductor in the past. Due to the copper price is more expensive, at the same time, general electric material part also use aluminum conductor, therefore, through the experimental study on the development of the aluminum conductor products. It not only can save a lot of copper after the aluminum conductor, still can save subject to special processing of copper aluminum transfer terminal, reduces the product cost accordingly; From the performance, because the aluminum conductor connected to the busbar of conductive contact area is larger than the original copper rod, overcome the traditional copper rod contact area is too small and the disadvantage of high generation. I plant the whole wall casing series products are mainly aluminum conductor, manual remains level 3kv、10 kv、35 kv, 400 ~ 1500A nut round copper conductive rod wear casing wall, used for maintenance. For the special 2000 a copper conductor wear casing wall, our factory has developed four orifice hold type terminal structure, reliable operation. The size of bushing connection terminal in GB5273 "transformer, high voltage electrical and casing connection terminal, can guarantee the swap.

外形尺寸图 Appearance and installation dimensions

CWWL-40.5/2500-4 Wall Bushing