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.

濟南電纜橋架

Jinan cable bridge

1、絕緣受潮情況。

1. Insulation moisture.

一般這樣的情況也相對常見，通常發(fā)生在直埋或排管里的電纜接頭處。比如：電纜接頭制作不合格和在潮濕的氣候條件下做接頭，會使接頭進水或混入水蒸氣，在電場作用下形成水樹枝，逐漸損害電纜的絕緣強度而造成故障。

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、化工原料的腐蝕。

2. Corrosion of chemical raw materials.

濟南電纜直接埋在有酸堿作用的地區(qū)，往往會造成電纜的鎧裝、鉛皮或外護層被腐蝕，保護層因長期遭受化學腐蝕或電解腐蝕，致使保護層失效，絕緣降低，也會導致電纜故障。

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、長期過負荷運行。

3. Long term overload operation.

超負荷運行，由于電流的熱效應，負載電流通過電纜時必然導致導體發(fā)熱，同時電荷的集膚效應以及鋼鎧的渦流損耗、絕緣介質(zhì)損耗也會產(chǎn)乍附加熱量，從而使電纜溫度升高。長期超負荷運行時，過高的溫度會加速絕緣的老化，以絕緣被擊穿。尤其在炎熱的夏季，電纜的溫升常常導致電纜絕緣薄弱處被擊穿，因此在夏季，電纜的故障也就特別多。

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、電纜接頭故障。

4. Cable joint failure.

電纜接頭是電纜線路中更薄弱的環(huán)節(jié)，由人員直接過失(施工不良)引發(fā)的電纜接頭故障時常發(fā)生。施工人員在制作電纜接頭過程中，如果有接頭壓接不緊、加熱不充分等原網(wǎng)，都會導致電纜頭絕緣降低，從而引發(fā)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、環(huán)境以及溫度因素。

5. Environmental and temperature factors.

濟南電纜橋架以及線纜周邊的外界環(huán)境和熱源也會造成電纜溫度過高、絕緣擊穿，嚴重的造成爆炸起火。

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、外力損傷。

6. External force damage.

當前的非常多的電纜故障均以機械損傷引起的居多。舉個例子看：電纜敷設安裝時不規(guī)范施工，容易造成機械損傷;在直埋電纜上搞土建施工也極易將運行中的電纜損傷等。有的情況下當時線纜的損傷不嚴重，可能需要幾個月甚幾年才可能會出現(xiàn)損傷部位徹底擊穿形成故障，還有的線纜損壞較重的可能發(fā)生短路故障，直接影響電纜橋架和用電單位的生產(chǎn)生活問題。

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.

濟南電纜橋架

Jinan cable bridge

相信通過以上文章大家對于濟南電纜橋架線纜老化的一些原因也有了一定的認識，不論是電纜橋架應用在什么地方，都應該注意其定期維護保養(yǎng)的問題，這樣才能有效地避免設備因為年數(shù)長出現(xiàn)故障而造成不必要的損失。以上就是增利來橋架帶大家為大家分析的線纜老化的原因。

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.

相關標簽： 濟南電纜橋架