电缆老化缘故一:长期过负荷运转。
Reason 1 for cable aging: long-term overload operation.
超负荷运转，由于电流的热效应，负载电畅经过电缆时必然形成导体发烧，同时电荷的集肤效应和钢铠的涡流消耗、绝缘介质消耗也会产乍附加热量，从而使电缆温度抬高。长期超负荷运转时，过高的温度会加速绝缘的老化，以至绝缘被击穿。越发在酷热的夏天，电缆的温升通常形成电缆绝缘微弱处首先被击穿，因此在夏天，电缆的障碍也就独特多。
Overload
operation, due to the thermal effect of the current, when the load
passes through the cable smoothly, it inevitably forms a conductor
fever. At the same time, the skin effect of the charge, the eddy current
consumption of the steel armor, and the consumption of the insulation
medium will also generate additional heat, resulting in an increase in
the temperature of the cable. During long-term overload operation,
excessively high temperatures can accelerate insulation aging, leading
to insulation breakdown. More and more in the scorching summer, the
temperature rise of cables usually causes the weak insulation of the
cables to be broken down first, so in the summer, the obstacles of the
cables are also unique.
电缆老化缘故二:外力损伤。
Reason 2 for cable aging: external force damage.
由近几年的运转分析来看，越发是在经济高速发展中的
海浦东，现在相等多的电缆障碍都是由于机械损伤形成的。譬如：电缆敷设安装时不规范施工，简易形成机械损伤;在直埋电缆上搞土建施工也极易将运转中的电缆损伤等。偶尔假如损伤不要紧，要几个月甚而几年才会形成损伤部位完全击穿形成障碍，偶尔毁坏要紧的可能产生短路障碍，直接影响电和用电单位的平安制造。
From
the operational analysis in recent years, it can be seen that it is
increasingly in the rapidly developing economy of Haipudong, and now an
equal number of cable obstacles are caused by mechanical damage. For
example, non-standard construction during cable laying and installation
can easily cause mechanical damage; Conducting civil construction on
directly buried cables can also easily damage cables during operation.
Occasionally, if the damage is not important, it will take several
months or even years to form a complete breakdown of the damaged area to
form an obstacle. Occasionally, if the damage is important, it may
create a short circuit obstacle, directly affecting the safe
manufacturing of electricity and consumers.
电缆老化缘故三:电缆接头障碍。
Reason three for cable aging: cable joint obstruction.
电缆接头是电缆线路中最微弱的环节，由职员直接过错(施工不良)激励的电缆接头障碍经常产生。施工职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，全部会形成电缆头绝缘降低，从而激励事件。
Cable
joints are the weakest link in cable routes, and cable joint obstacles
often arise due to direct faults (poor construction) caused by
employees. During the process of manufacturing cable joints, if there
are loose crimping or insufficient heating of the joints in the original
network, all of them will form a decrease in cable head insulation,
which will stimulate the event.
电缆老化缘故四:绝缘受潮。
Reason 4 for cable aging: Damping of insulation.
这种状况也很常见，通常产生在直埋或排管里的电缆接头处。譬如：电缆接头制造分歧格和在润湿的气候条件下做接头，会使接头进水或混入水蒸气，时光久r在电场作用下形成水树枝，逐步侵害电缆的绝泥杆 保定古筝 塑料增韧剂 拱形护坡模具 保定空调维修 托辊生产线缘强度而形成障碍。
This
situation is also common, usually occurring at cable joints directly
buried or in ducts. For example, the manufacturing of cable joints with
different grids and the making of joints under humid weather conditions
can cause water or steam to enter the joints. Over time, under the
action of an electric field, water branches form, gradually damaging the
insulation strength of the cable and forming obstacles.
电缆老化缘故五:化学侵蚀。
Reason 5 for cable aging: chemical erosion.
电缆直接埋在有酸碱作用的地区，往往会形成电缆的铠装、铅皮或外护层被侵蚀，保护层因长期遭受化学侵蚀或电解侵蚀，致使保护层失效，绝缘降低，也会形成电缆障碍。化：单位的电缆侵蚀状况就相等要紧
Directly
burying cables in areas with acid-base interactions often leads to
erosion of the cable's armor, lead skin, or outer protective layer. The
protective layer may become ineffective due to long-term chemical or
electrolytic erosion, resulting in reduced insulation and cable
barriers. The erosion status of cables per unit is equally important