Analysis of six main reasons for simple aging of cables on cable tray

在线路敷设工程中，电缆桥架是一种很重要的隶属设备，主要是担任起到一个辅佐合理布线而且长时间维护线路的效果，一般状况下电缆桥架上的线缆全赖外面的绝缘层，假如这层表皮损坏后绝缘功能将会下降许多，接下来我们就来说一下电缆桥架上的电缆简单老化的六大原因吧。

Cable bridge is a very important subordinate equipment in line laying engineering. It mainly serves as an assistant for reasonable wiring and long-term maintenance of the line. In general, the cable on the cable bridge depends on the external insulation layer. If this layer of skin is damaged, the insulation function will drop a lot. Next I Let's talk about the six main reasons for the simple aging of cables on the cable tray.

1.绝缘受潮状况；一般这样的状况也相对常见，一般发作在直埋或排管里的电缆接头处。比方：电缆桥架上的电缆接头制造不合格和在湿润的气候条件下做接头，会使接头进水或混入水蒸气，在电场效果下构成水树枝，逐渐危害电缆的绝缘强度而构成毛病。

1. Insulation damp condition; generally this kind of condition is relatively common, usually occurs in the direct buried or row pipe cable junction. For example, if the cable joints on the cable bridge are fabricated unqualified and made in wet climates, the joints will enter water or mix with water vapor, forming water branches under the electric field effect, gradually endangering the insulation strength of the cable and forming defects.

2.化工原料的腐蚀；电缆直接埋在有酸碱效果的区域，往往会构成电缆的铠装.铅皮或外护层被腐蚀，维护层因长时间遭受化学腐蚀或电解腐蚀，致使维护层失效，绝缘下降，也会导致电缆毛病。

2. Corrosion of chemical raw materials; Cables buried directly in areas with acid and alkali effects, often constitute the armor of the cable. Lead skin or outer protective layer is corroded, the maintenance layer due to long-term chemical corrosion or electrolytic corrosion, resulting in failure of the maintenance layer, insulation decline, also lead to cable defects.

3.长时间过负荷运转；超负荷运转，因为电流的热效应，负载电流经过电缆时必定导致导体发热，一起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，然后使电缆温度升高。长时间超负荷运转时，过高的温度会加快绝缘的老化，以绝缘被击穿。尤其在酷热的夏日，电缆桥架的温升常常导致电缆绝缘单薄处首要被击穿，因此在夏日，电缆的毛病也就特别多。

3. Long-term overload operation; overload operation, because of the thermal effect of current, load current through the cable must lead to conductor heating, together with the skin effect of charges and steel armor eddy current loss. Dielectric loss will also produce additional heat, and then make the cable temperature rise. Over a long period of time, excessive temperature will accelerate the aging of insulation and even breakdown of insulation. Especially in the hot summer, the temperature rise of the cable bridge often causes the thin insulation of the cable to be first broken down, so in the summer, cable problems are particularly numerous.

4.电缆接头毛病；电缆接头是电缆线路中单薄的环节，由人员直接过错(施工不良)引发的电缆接头毛病时常发作。施工人员在制造电缆接头过程中，假如有接头压接不紧.加热不充分等原网，都会导致电缆头绝缘下降，然后引发事端。

4. Cable joint faults; Cable joint is a thin link in the cable line. Cable joint faults caused by personnel's direct fault (bad construction) often occur. In the process of making cable joints, if the joints are not pressed tightly and the original network is not heated sufficiently, the insulation of the cable head will drop, and then cause an accident.

5.环境以及温度因素；电缆桥架以及线缆周边的外界环境和热源也会构成电缆温度过高.绝缘击穿，严峻的构成爆破起火。

5. Environment and temperature factors; the external environment and heat sources around the cable bridge and cable will also constitute the cable temperature is too high. Insulation breakdown, severe composition of explosion and fire.

6.外力损害。当时的十分多的电缆毛病均以机械损害引起的居多。举个例子看：电缆敷设装置时不标准施工，简单构成机械损害;在直埋电缆上搞土建施工也极易将运转中的电缆损害等。有的状况下当时线缆的损害不严峻，可能需求几个月乃几年才可能会呈现损害部位彻底击穿构成毛病，还有的线缆损坏较重的可能发作短路毛病，直接影响电缆桥架和用电单位的生产日子保障问题。

6. external force damage. At that time, a lot of cable faults were mostly caused by mechanical damage. For example, cable laying device is not standard construction, which simply constitutes mechanical damage; civil construction on directly buried cable is also very easy to damage the cable in operation. In some cases, the damage to the cables was not serious, it may take several months or even years for the damaged parts to be completely broken down, and the damaged parts of the cables may be seriously short-circuit fault, which will directly affect the production of the cable bridge and the production of electricity supply unit.

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Jinan Hangfeng Industry Co., Ltd., Shandong cable bridge friends can pay attention to our http://www.sdhangfeng.com, please look forward to more exciting content.