Jinan cable tray is widely used, and its cable is mainly insulated by a layer of outer sheath. If the cable tray is not well protected and is corroded by external gas for a long time, the insulation performance of the cable tray will gradually decrease, and it will not play an important role at this time. The insulation layer on the surface of the cable is made of plastic and rubber. Sometimes it is found that it is aging. What are the causes? Then for this problem, Zengli will take you to analyze the bridge.

济南电缆桥架

Jinan cable bridge

1、绝缘受潮情况。

1. Insulation moisture.

一般这样的情况也相对常见，通常发生在直埋或排管里的电缆接头处。比如：电缆接头制作不合格和在潮湿的气候条件下做接头，会使接头进水或混入水蒸气，在电场作用下形成水树枝，逐渐损害电缆的绝缘强度而造成故障。

Generally, this kind of situation is also relatively common, which usually occurs at the cable joint directly buried or in the pipe bank. For example, if the cable joint is not made up to standard and is made under humid climate conditions, water will enter the joint or mix with water vapor, which will form water tree under the action of electric field, which will gradually damage the insulation strength of the cable and cause fault.

2、化工原料的腐蚀。

2. Corrosion of chemical raw materials.

济南电缆直接埋在有酸碱作用的地区，往往会造成电缆的铠装、铅皮或外护层被腐蚀，保护层因长期遭受化学腐蚀或电解腐蚀，致使保护层失效，绝缘降低，也会导致电缆故障。

Jinan cable is buried directly in the acid-base area, which often leads to the corrosion of the armor, lead skin or outer protective layer of the cable. Due to the long-term chemical corrosion or electrolytic corrosion of the protective layer, the protective layer fails and the insulation is reduced, which also leads to cable failure.

3、长期过负荷运行。

3. Long term overload operation.

超负荷运行，由于电流的热效应，负载电流通过电缆时必然导致导体发热，同时电荷的集肤效应以及钢铠的涡流损耗、绝缘介质损耗也会产乍附加热量，从而使电缆温度升高。长期超负荷运行时，过高的温度会加速绝缘的老化，以绝缘被击穿。尤其在炎热的夏季，电缆的温升常常导致电缆绝缘薄弱处被击穿，因此在夏季，电缆的故障也就特别多。

During overload operation, due to the thermal effect of current, the conductor will inevitably be heated when the load current passes through the cable. At the same time, the skin effect of charge, eddy current loss of steel armor and dielectric loss of insulation will also produce additional heat, which will increase the temperature of the cable. During long-term overload operation, high temperature will accelerate the aging of insulation and even the insulation will be broken down. Especially in the hot summer, the temperature rise of the cable often leads to the breakdown of the weak part of the cable insulation, so in summer, there are many cable faults.

4、电缆接头故障。

4. Cable joint failure.

电缆接头是电缆线路中更薄弱的环节，由人员直接过失(施工不良)引发的电缆接头故障时常发生。施工人员在制作电缆接头过程中，如果有接头压接不紧、加热不充分等原网，都会导致电缆头绝缘降低，从而引发事故。

The cable joint is the weakest link in the cable line. The cable joint fault caused by the direct fault of personnel (poor construction) often occurs. In the process of making cable joints, if there are joints that are not crimped tightly and heated insufficiently, the insulation of cable head will be reduced, which will lead to accidents.

5、环境以及温度因素。

5. Environmental and temperature factors.

济南电缆桥架以及线缆周边的外界环境和热源也会造成电缆温度过高、绝缘击穿，严重的造成爆炸起火。

Jinan cable bridge and the surrounding environment and heat source of the cable will also cause the cable temperature is too high, insulation breakdown, serious explosion and fire.

6、外力损伤。

6. External force damage.

当前的非常多的电缆故障均以机械损伤引起的居多。举个例子看：电缆敷设安装时不规范施工，容易造成机械损伤;在直埋电缆上搞土建施工也极易将运行中的电缆损伤等。有的情况下当时线缆的损伤不严重，可能需要几个月甚几年才可能会出现损伤部位彻底击穿形成故障，还有的线缆损坏较重的可能发生短路故障，直接影响电缆桥架和用电单位的生产生活问题。

At present, many cable faults are caused by mechanical damage. For example, if the cable laying and installation are not standardized, it is easy to cause mechanical damage; if civil construction is carried out on directly buried cable, it is easy to damage the cable in operation. In some cases, the damage of the cable is not serious at that time. It may take several months or even several years for the damaged parts to break down completely to form a fault, and some cables with serious damage may have a short circuit fault, which will directly affect the production and living safety of cable bridge and power users.

济南电缆桥架

Jinan cable bridge

相信通过以上文章大家对于济南电缆桥架线缆老化的一些原因也有了一定的认识，不论是电缆桥架应用在什么地方，都应该注意其定期维护保养的问题，这样才能有效地避免设备因为年数长出现故障而造成不必要的损失。以上就是增利来桥架带大家为大家分析的线缆老化的原因。

I believe that through the above article, we have a certain understanding of some reasons for the aging of cable tray in Jinan. No matter where the cable tray is applied, we should pay attention to its regular maintenance, so as to effectively avoid unnecessary loss caused by equipment failure due to years. The above is the reason why zenglilai bridge takes you to analyze the cable aging.

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