The bus bar is to install the main power supply cable (copper bar and aluminium bar are called bus bar) in the distribution power supply, and each branch line (branch bar) is led up and down by the bus bar. That is to say, in the fragmentation of power supply, the connection between the main gate in the cabinet and the gates in the branch path can be nominally insulated. The important role is to act as a conductor. However, there will be insurance problems in the bare bus, and the excessive phase insulation spacing can not meet the design requirements and other reasons, a type of bus has emerged. The scale of utilization of this kind of heat-shrinkable tube is as follows: 1. Stop short-circuit faults caused by small plants such as rats and snakes; 2. Prevent the erosion of chemical substances such as acid, alkali and salt to the mother row; 3. Prevent maintenance personnel from accidentally entering the live gap in case of injury; 4. Stagnation trend of medium-sized phase distribution door cabinet; 5. Overcome the insulation problem between busbar slots.

For this kind of heat-shrinkable bushing, its caliber is independent of the busbar to be used. It varies from 25 to 400 mm. The voltage is divided into 1KV, 10KV and 35KV. The color of the busbar is mainly red, yellow and green. Expansion ratio is between 2:1 and 3:1. Continuous use temperature is - 55 ~105 C. The lowest initial expansion temperature is 80 C. The lowest total expansion temperature is 120 C. Expansion progress is fast. Bus heat shrinkable pipes also have relevant requirements of flame retardancy, aging resistance, insulation, water absorption, etc. The requirements of the Department can be found in an industry standard of the Ministry of Wind Power, "DLT1059-2007 Bus heat shrinkable pipes for wind facilities".

In choosing and purchasing heat-shrinkable bushing for mother row, the first consideration is whether the voltage is 1KV, 10KV or 35KV: the second is caliber, which is similar to double-wall heat-shrinkable tubes of electronic products. If the caliber is moderate and the wall thickness is thicker after natural expansion, the insulation performance is better. The breakdown strength of 1mm thickness is about 25KV. Normally, the specifications provided by the original manufacturer are suitable for a large number of mother row products.

The heat-shrinkable tube products should be protected from direct sunlight or conditional heat more than 60 C in storage and transportation. When conditional heat more than 60 C, the heat-shrinkable tube products can produce local shrinkage.

Skills parameters using thermal shrinkage data

(1) Flame Retardant Property of Thermal Shrinkage Data

In the wind fragmentation, the insulation materials selected for indoor use should be flame retardant. The thermal shrinkage data used for substation insulation protection are mainly rubber-plastic blended polymer, which adds flame retardant with excellent performance and its oxygen index is 32 by test. It has good self-extinguishing property. It can meet the flame retardant requirement of fragmentary wind power.

(2) Aging Resistance of High Temperature Heat Shrinkage Pipe Thermal Shrinkage Data

Because of the long-term reliability of wind power fragmentary water supply facilities, radiation cross-linked thermal shrinkage data are widely used overseas for its superior performance over other data. We know that from the principle of thermal shrinkage, the properties of thermal expansion and macroscopic properties, the cross-linking structure of external network is the reason why the aging resistance of thermal shrinkage data is better than other insulation data.

(3) Thermal shrinkage data for substation special thermal shrinkage data has no great change in performance (for substation special series thermal shrinkage data) after 158 (+2 C) and 168 h thermal aging tests because of its extraordinary macroscopic nature. Normally, the maximum operating heat of substation bus is 70 C. Therefore, the special thermal shrinkage data of substation can meet the requirements of substation operation for its temperature resistance characteristics.

For more information, please contact to

Contact：15918777767

              020-82586869

   Q  Q:    281494549

E-mail：lily@gzhelectric.com

母排热缩管怎样保存和运载

母排就是配电供电安装主供电缆路（铜排、铝排都叫母排）,各分干线（支排）由母排上引下.也就是供电零碎中,电柜中总制电门与各分路通路中的电门的联接铜排或铝排，其名义有做绝缘解决.重要作用是做导线用。然而裸母排会存在保险问题，以及其相绝缘间距过大使不得满足设计要求等原因，一种类型母排管就出现了。这种母排热缩管利用规模是：1.杜绝老鼠、蛇等小植物导致的短路故障；2.预防酸、碱、盐等化学物质对母排的侵蚀；3，预防检修人员误入带电间隙造成万一中伤；4，相配电门柜中型化的停滞趋向；5.克服母线槽的相间绝缘问题。

关于这种母排热缩套管，其口径与应运用的母线无关，从25-400mm不等,电压分为1KV，10KV，35KV二类,色彩重要是红黄绿三相色。膨胀比正常在2：1到3：1之间，连续使用温度：-55℃～105℃，最低起始膨胀热度：80℃，最低彻底膨胀热度：120℃，膨胀进度快。母线热缩管也有有关的阻燃性，耐老化，绝缘性，吸水性等有关要求，该署要求都能够在风力部的一个行业标准中查到,《DLT1059-2007风力设施母线用热缩管》。

在选购母排热缩套管，率先思忖的电压，是1KV，10KV,还是35KV：其次是口径，和电子出品热缩管类双壁热缩管似，口径要适中，自然膨胀后壁厚较厚的话，绝缘性能要好些，1mm厚击穿强度是约25KV,正常当初厂家提供的规格适宜于绝大少数母排出品。

热收缩管出品在保存和运载内中中要防止阳光直射或条件热度胜于60℃，当条件热度胜于60℃时，热收缩出品可产生局部收缩。

用热缩资料的技能参数

（1）热缩资料的阻燃性能

在风力零碎中，户内所选项用的绝缘资料均务求阻燃。用来变电站绝缘防护的热缩资料以橡塑共混高聚物为主体，增添性能优异的阻燃剂、经试验测定其氧指数为32，存在很好的离火自熄性。可满足风力零碎的阻燃务求。

（2）高温热缩管热缩资料的耐老化性能

风力零碎的供用水设施需存在长期运行的牢靠性，因而，辐射交联热缩资料以其超过其它资料的卓越性能为海外风力零碎宽泛利用。咱们晓得，从热缩原理、热膨胀的性质及宏观性质下去看，源于外部网络的交联构造，正是因为这种起因，热缩资料的抗老化性能优于其它绝缘资料。

（3）变电站专用热缩资料的耐温性能热缩资料因其存在非凡的宏观性质，经158±2℃、168h热老化试验后，性能无大变迁（对变电站专用系列热缩资料而言）。正常说来，变电站母排的极限作业热度为70℃。因而，变电站专用热缩资料能够满足变电站运行对其耐温特点的务求。