電纜橋架絕緣單獨(dú)外包皮，一旦保護(hù)不好，長(zhǎng)時(shí)間暴露在環(huán)境空氣腐蝕，絕緣性，相對(duì)來說會(huì)大大降低，會(huì)有年齡慢慢硬化，直到秋天，這個(gè)時(shí)候保溫效果不大，一般電纜絕緣是由橡膠和塑料的，那么它的老化是什么原因？下面山東電纜橋架小編為您講解一番。

The insulation of the cable tray is wrapped separately. Once it is not well protected and exposed to the ambient air for a long time, the insulation will be greatly reduced, and it will harden slowly until autumn. At this time, the insulation effect is not good. Generally, the cable insulation is made of rubber and plastic. What is the reason for its aging? Next, Shandong Cable Tray will explain it to you.

1、長(zhǎng)期過負(fù)荷運(yùn)行：超負(fù)荷運(yùn)行，由于電流的熱效應(yīng)，負(fù)載電流通過電纜時(shí)必然導(dǎo)致導(dǎo)體發(fā)熱，同時(shí)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(huì)產(chǎn)乍附加熱量，從而使電纜溫度升高。長(zhǎng)期超負(fù)荷運(yùn)行時(shí)，過高的溫度會(huì)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(dǎo)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。

1. Long term overload operation: overload operation, due to the thermal effect of the current, when the load current passes through the cable, it will inevitably lead to conductor heating. At the same time, the skin effect of the charge, the eddy current loss of the steel armor, and the insulation medium loss will also produce additional heat, which will increase the cable temperature. During long-term overload operation, excessive 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 insulation of the cable first. Therefore, in summer, there are many cable failures.

2、化工原料的腐蝕：電纜橋架直接埋在有酸堿作用的地區(qū)，往往會(huì)造成電纜的鎧裝、鉛皮或外護(hù)層被腐蝕，保護(hù)層因長(zhǎng)期遭受化學(xué)腐蝕或電解腐蝕，致使保護(hù)層失效，絕緣降低，也會(huì)導(dǎo)致電纜故障。

2. Corrosion of chemical raw materials: cable bridge is directly buried in the area with acid and alkali effect, which often causes corrosion of cable armor, lead skin or outer protective layer. The protective layer is subject to chemical corrosion or electrolytic corrosion for a long time, resulting in failure of protective layer, insulation reduction, and cable failure.

3、環(huán)境以及溫度因素：電纜橋架以及線纜周邊的外界環(huán)境和熱源也會(huì)造成電纜溫度過高、絕緣擊穿，嚴(yán)重的造成爆炸起火。

3. Environment and temperature factors: The external environment and heat source around the cable tray and cable will also cause excessive temperature and insulation breakdown of the cable, which will seriously cause explosion and fire.

4、電纜接頭故障：橋架接頭是電纜線路中薄弱的環(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(shí)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(huì)導(dǎo)致電纜頭絕緣降低，從而引發(fā)事故。

4. Cable joint failure: the bridge joint is a weak link in the cable route, and cable joint failures caused by direct negligence of personnel (poor construction) often occur. In the process of making cable joints, if there are loose crimping and insufficient heating of the original network, the insulation of the cable head will be reduced, which will lead to accidents.

此外電纜敷設(shè)安裝時(shí)不規(guī)范施工，容易造成機(jī)械損傷;在直埋電纜上搞土建施工也易將運(yùn)行中的電纜損傷等。以上就是問題的解答內(nèi)容了，您對(duì)此有什么疑惑要解答嗎？歡迎來我們網(wǎng)站http://m.ymmgjx.net咨詢！

In addition, the cable laying and installation are not standardized, which is easy to cause mechanical damage; Civil construction on directly buried cables is also easy to damage cables in operation. The above is the answer to the question. Do you have any questions to answer? Welcome to our website http://m.ymmgjx.net consulting service