How To Purchase Busbar Bushing

- Nov 19, 2018-

We briefly introduce the information about the heat shrinkable busbar used on the bus bar.

Master row heat shrinkable tube is also called flame retardant high pressure busbar heat shrinkable sleeve, which is divided into 10 KV high pressure busbar protection heat shrinkable sleeve and 35 KV high pressure busbar protection heat shrinkable sleeve. High voltage busbar heat shrinkable bushing, |10kv busbar insulation heat shrinkable bushing |35kv busbar insulation heat shrinkable sheath.

First of all, the bus bar is the main power supply line of distribution power supply device (copper bar and aluminium bar are called bus bar). Each branch line (branch bar) is led up and down by the bus bar. That is to say, in the power supply system, the main switch in the cabinet is connected with the switch in the branch circuit by copper bar or aluminium bar, whose surface is insulated. The line is used. However, there are safety problems in the bare bus, as well as the reason that the phase insulation distance is too large to meet the design requirements, so the bus is born. The application scope of the heat shrinkable tube is:

1. eliminate the short-circuit fault caused by rats, snakes and other small animals.

2. prevent acid, alkali, salt and other chemicals from corrosion to the bus bar.

3. prevent the maintenance personnel from entering the live space and cause accidental injury.

4. adapt to the development trend of switch cabinet miniaturization

5. solve the problem of interphase insulation in busbar.

For this kind of heat shrinkable bushing, its caliber is related to the busbar used. It varies from 25 mm to 400 mm. The voltage can be divided into three categories: 1KV, 10KV and 35KV. The color of the bushing is mainly red, yellow and green. Shrinkage ratio is generally between 2:1 and 3:1, continuous use temperature: - 55 ~105 C, minimum initial shrinkage temperature: 80 C, minimum complete shrinkage temperature: 120 C, shrinkage speed is fast. Matrix heat-shrinkable tubes also have relevant requirements of flame retardancy, aging resistance, insulation, water absorption, etc. These requirements can be found in an industry code of the Ministry of Electricity, "DLT 1059-2007 heat-shrinkable tubes for buses of power equipment".

When purchasing busbar heat shrinkable bushing, the first consideration is voltage, 1K, 10KV or 35KV: the second is caliber, which is similar to that of electronic products heat shrinkable bushing. The caliber should be moderate. Of course, if the wall thickness is thicker after shrinkage, the insulation performance is better. The breakdown strength of 1mm thickness is about 25KV. Generally, the specifications provided by manufacturers are suitable for most of the mothers. Layout products; and then the color, generally red, yellow and green, but there are other colors, very few, such as black mother heat pipe, Purple Mother heat pipe. Usually the surface of the mother row tube is smooth, the wall thickness is uniform, and the thickness meets the standard, then it is better goods. The intrinsic is the physical and electrical properties. These can only be used in practice. The key to the flame retardant performance of the mother row heat shrinkage tube is to see what kind of flame retardant is added in it, the measurement added, and the communication. The price of flame-retardant properties is more expensive, because additives are more expensive. If you encounter products with special specifications, such as caliber, color, etc., if you can't find the existing manufacturers to do it, you can only customize them specially. That price is very high, and it will involve a large amount of the cost of opening the mould. Sample cost, the sample can not be a small amount at a time, because mixers and Extruders must have a certain amount. It can be produced, especially with regard to color changing and formula.

For heat shrinkable casing, brand goods, quality assurance, stable performance, good reputation, high price is relatively high, small manufacturers have obvious price advantages, but product stability, production capacity, supply reputation is worth studying.


什么是母排热缩管,如可采购母排套管

    我们简单给大家介绍母排上用的热缩母排管的相关信息。

    母排热缩管又称阻燃高压母线排热缩套管,分为10KV高压母排保护热缩套管和35KV高压母排保护热缩套管。高压母线排热缩套管、|10kv母线绝缘热缩套管|35kv母排绝缘热缩护套。

    首先来说说母排,母排就是配电供电装置主供电线路(铜排、铝排都叫母排),各分支线(支排)由母排上引下. 也就是供电系统中,电柜中总制开关与各分路电路中的开关的连接铜排或铝排,其表面有做绝缘处理.主要作用是做导线用。但是裸母排会存在安全问题,以及其相绝缘间距过大不能满足设计要求等原因,于是母排管就诞生了。这种母排热缩管应用范围是:

    1.杜绝老鼠、蛇等小动物引起的短路故障 

 2.防止酸、碱、盐等化学物质对母排的腐蚀 

 3.防止检修人员误入带电间隙造成意外伤害

 4.适应开关柜小型化的发展趋势

    5.解决母线槽的相间绝缘问题

    对于这种母排热缩套管,其口径根据其对应使用的母线有关,从25-400mm不等,电压分为1KV,10KV,35KV三类,颜色主要是红黄绿三相色。收缩比一般在2:1到3:1之间,连续使用温度:-55℃~105℃,最低起始收缩温度:80℃,最低完全收缩温度:120℃,收缩速度快。母排热缩管也有相关的阻燃性,耐老化,绝缘性,吸水性等相关要求,这些要求都可以在电力部的一个行业规范中查到,《DLT 1059-2007电力设备母线用热缩管》。

    在采购母线热缩套管时,首先考虑的是电压,1K,10KV,还是35KV:其次是口径,和电子产品热缩管相似,口径要适中,当然收缩后壁厚较厚的话,绝缘性能要好些,1mm厚击穿强度是约25KV,一般现在厂家提供的规格适合于绝大多数母排产品;然后就是颜色了,一般都是红黄绿三色,不过也有其他颜色的,很少而已,比如黑母排热缩管,紫母排热缩管。通常母排管表面光滑,壁厚较均匀,而且厚度满足标准的话就是比较好的货了,内在的就是物理和电气性能了,这些只能是实际用了才知道,母排热缩管的阻燃性能,关键还是看里面添加的什么种类的阻燃剂,添加的计量,通常阻燃性能好的价格都要贵些,因为添加剂是比较贵的。如果遇到特殊规格的产品,比如口径,颜色等,如果不能找到现有厂家做,只能特殊定制,那样价格很高,而且会牵涉到数额较大的开模具的费用,试样费用,试样一次不可能是很少的量,因为密炼机和挤出机必须得有一定量才能生产出来,特别是牵涉到改颜色和配方的问题。

    对于热缩套管,品牌货,质量有保证,性能稳定,信誉好,价高也相对较高,小厂家的有明显的价格优势,不过产品稳定性,生产能力,供货信誉就值得研究了。