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电缆桥架线缆老化的原因

电缆桥架线缆老化的原因
Causes of cable bridge cable aging
跟着电缆桥架的广泛应用,在运用的呈现的毛病也层出不强,比方线缆老化现象,线缆主要靠外面一层包皮绝缘,假如保护欠好,其绝缘功能就会逐步下降,渐渐老化变硬发脆或掉落,然后起不到绝缘的效果。那么是什么原因导致电缆桥架线缆老化呢?接下来,就带大家了解一下。
With the widespread application of cable bridge, there are many defects in operation, such as cable aging phenomenon, cable mainly rely on an outer layer of insulation, if the protection is not good, its insulation function will gradually decline, gradually aging, hardening, brittle or falling, and then no insulation effect. So what causes cable bridge cable aging? Next, let us know about it.
1.化工原料的腐蚀。
1. corrosion of chemical raw materials.
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,保护层因长时间遭受化学腐蚀或电解腐蚀,致使保护层失效,绝缘下降,然后导致线缆老化。
Cables buried directly in the acid-base effect of the area, often constitute the cable armoured lead skin or outer protective layer is corroded, protective layer due to long-term chemical corrosion or electrolytic corrosion, resulting in the failure of protective layer, insulation decline, and then lead to cable aging.
2.长时间过负荷运行。
2. long time overload operation.
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,然后使电缆桥架的电缆温度升高。长时间超负荷运行时,过高的温度会加快绝缘的老化,以致绝缘被击穿。尤其在炎热的夏日,电缆的温升常常导致电缆绝缘单薄处首先被击穿,因此在夏日,电缆的毛病也就特别多。
Because of the thermal effect of current, the load current must cause the conductor to heat when it passes through the cable. The skin effect of electric charge and the eddy current loss of steel armor will produce additional heat at first, then the cable temperature of the cable bridge will rise. Over a long period of operation, excessive temperature will accelerate the aging of insulation, resulting in insulation breakdown. Especially in the hot summer, the temperature rise of the cable often causes the thin insulation of the cable to be first broken down, so in the summer, cable problems are particularly numerous.
山东电缆桥架
3.电缆接头毛病。
3. cable connection fault.
电缆接头是电缆线路中比较单薄的环节,由人员直接过错引发的电缆接头毛病经常发作,所以,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,呈现线缆老化现象。
Cable joint is a thin link in the cable line. Cable joint faults caused by direct faults often occur. Therefore, in the process of making cable joints, if the joints are not pressed tightly and heated insufficiently, the original network will lead to cable head insulation decline, showing cable aging phenomenon.
4.绝缘受潮状况。
4. insulation damp condition.
一般这样的状况相对比较常见,一般发作在直埋或排管里的电缆接头处。比方电缆桥架的接头制造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,在电场效果下构成水树枝,逐步损害电缆的绝缘强度而构成毛病。
Generally, this situation is relatively common, and usually occurs in the cable joints where burying or draining pipes are located. For example, if the joints of cable bridges are fabricated unqualified and made in damp climates, the joints will enter water or mix with water vapor, forming water branches under the effect of electric field, gradually damaging the insulation strength of the cable and causing problems.
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,呈现线缆老化现象,严峻的话,还会构成爆破起火。
External environment and heat source around cable bridge and cable will also cause insulation breakdown of cable temperature too high, showing cable aging phenomenon, if severe, it will also constitute a blasting fire.
济南航丰实业有限公司,对山东电缆桥架感兴趣的朋友可以关注我们,敬请期待更多精彩雕塑内容
Jinan Hanfeng Industry Co., Ltd., friends interested in Shandong cable bridge can pay attention to our , please look forward to more wonderful sculpture content
 
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