Cable tray manufacturers talk about the reasons for the aging of cable tray skin?

1、絕緣受潮狀況。一般這樣的狀況也相對常見，一般發(fā)生在直埋或排管里的電纜接頭處。比方：電纜橋架接頭制造不合格和在濕潤的氣候條件下做接頭，會使接頭進(jìn)水或混入水蒸氣，在電場效果下構(gòu)成水樹枝，逐漸危害電纜的絕緣強度而構(gòu)成缺點。

1. Damp condition of insulation. Generally, this kind of situation is relatively common, which usually occurs at the cable joint in the directly buried or arranged pipe. For example: the unqualified manufacture of cable tray joint and making joint in humid climate will make the joint enter water or mix with water vapor, which will form water branch under the effect of electric field, and gradually endanger the insulation strength of the cable.

2、化工原料的腐蝕。電纜橋架直接埋在有酸堿效果的區(qū)域，往往會構(gòu)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(xué)腐蝕或電解腐蝕，致使保護層失效，絕緣下降，也會導(dǎo)致電纜缺點。

2. Corrosion of chemical raw materials. When the cable tray is directly buried in the area with acid-base effect, the armor, lead skin or outer protective layer of the cable will be corroded. Due to long-term chemical corrosion or electrolytic corrosion of the protective layer, the protective layer will fail and the insulation will decline, which will also lead to the defects of the cable.

3、長期過負(fù)荷作業(yè)。超負(fù)荷作業(yè)，因為電流的熱效應(yīng)，負(fù)載電流通過電纜時必定導(dǎo)致導(dǎo)體發(fā)熱，一同電荷的集膚效應(yīng)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，然后使電纜溫度升高。長期超負(fù)荷作業(yè)時，過高的溫度會加速絕緣的老化，致使絕緣被擊穿。尤其在火熱的夏天，電纜的溫升常常導(dǎo)致電纜絕緣單薄處首要被擊穿，因此在夏天，電纜的缺點也就特別多。

3. Long term overload operation. Overload operation, because of the thermal effect of the current, the load current through the cable must cause the conductor to heat, the skin effect of the same charge, the eddy current loss of the steel armor and the insulation medium loss will also produce additional heat, and then make the cable temperature rise. During long-term overload operation, too high temperature will accelerate the aging of insulation, resulting in breakdown of insulation. Especially in hot summer, the temperature rise of the cable often leads to the breakdown of the thin part of the cable insulation, so in summer, there are many disadvantages of the cable.
      

4、電纜接頭缺點。橋架接頭是電纜線路中單薄的環(huán)節(jié)，由人員直接差錯(施工不良)引發(fā)的電纜接頭缺點常常發(fā)生。施工人員在制造電纜接頭過程中，如果有接頭壓接不緊、加熱不充分等原網(wǎng)，都會導(dǎo)致電纜頭絕緣下降，然后引發(fā)事端。

4. Disadvantages of cable joint. The bridge joint is a thin link in the cable line, and the defects of the cable joint caused by personnel's direct error (poor construction) often occur. In the process of making cable joints, if there are some original nets such as loose crimping and insufficient heating, the insulation of the cable head will drop, and then cause accidents.

5、環(huán)境以及溫度要素。電纜橋架以及線纜周邊的外界環(huán)境和熱源也會構(gòu)成電纜溫度過高、絕緣擊穿，嚴(yán)峻的構(gòu)成爆破起火。

5. Environment and temperature elements. The external environment and heat source around the cable bridge and cable will also cause the cable temperature to be too high, insulation breakdown, and serious explosion and fire.

6、外力危害。其時的十分多的電纜缺點均以機械危害引起的居多。舉個比方看：電纜敷設(shè)設(shè)備時不規(guī)范施工，簡略構(gòu)成機械危害;在直埋電纜上搞土建施工也簡略將作業(yè)中的電纜危害等。有的狀況下其時線纜的危害不嚴(yán)峻，或許需求幾個月乃幾年才或許會呈現(xiàn)危害部位擊穿構(gòu)成缺點，還有的線纜損壞較重的或許發(fā)生短路缺點，直接影響電纜橋架和用電單位的出產(chǎn)日子中的問題。

6. External force is harmful. At that time, most of the cable defects were caused by mechanical hazards. For example: the cable laying equipment is not standardized construction, which simply constitutes a mechanical hazard; Civil engineering construction on directly buried cables will also reduce the cable hazards in operation. In some cases, the harm of the cable is not serious, and it may take several months or even years to present the defect of breakdown of the damaged parts. In some cases, the cable with serious damage may have the defect of short circuit, which directly affects the problems in the production days of the cable bridge and the power users.