8、交联聚乙烯电缆和油纸电缆比较有哪些优点？
8, what are the advantages of XLPE cables and oil paper cables?
答：
Answer:
（1）易安装，因为它允许最小弯曲半径小、且重量轻；
(1) easy to install because it allows minimum bending radius, small and light weight;
（2）不受线路落差限制；
(2) not limited by line drop;
（3）热性能好，允许工作温度高、传输容量大；
(3) good thermal performance, allowing high operating temperature and large transmission capacity;
（4）电缆附件简单，均为干式结构；
(4) the cable accessories are simple, all dry structures;
（5）运行维护简单，无漏油问题；
(5) simple operation and maintenance, no oil leakage;
（6）价格较低；
(6) the price is lower;
（7）可靠性高、故障率低；
(7) high reliability and low failure rate;
（8）制造工序少、工艺简单，经济效益显著。
(8) the manufacturing process is few, the process is simple, and the economic benefit is remarkable.
9、固定交流单芯电缆的夹具有什么要求？为什么？
9 、 What are the requirements for fixing the fixture of AC single core cable? Why?
答：夹具应无铁件构成闭合磁路，这是因为当电缆线芯通过电流时，在其周围产生磁力线，磁力线与通过线芯的电流大小成正比，若使用铁件等导磁材料，根据电磁感应可知，将在铁件中产生涡流使电缆发热，甚至烧坏电缆。所以不可使用铁件作单芯交流电缆的固定夹具。
Answer: the fixture should be no iron to form a closed magnetic circuit, this is because when the cable core through the current, generating a magnetic flux in the surrounding magnetic field and current through the wire core is proportional to the size, if the use of iron magnetic material, on the basis of electromagnetic induction that will produce eddy flow to cable heating in iron castings. And even burn the cable. Therefore, the iron piece can not be used as the fixing clamp for the single core AC cable.
10、以下的热缩电缆头的附件的最大特点和优点是什么？ 答：热缩附件的最大特点是用应力管代替传统的应力锥，它不仅简化了施工工艺，还缩小了接头的终端的尺寸，安装方便，省时省工，性能优越，节约金属。热缩电缆附件集灌注式和干包式为一体，集合了这两种附件的优点。
What are the main features and advantages of the accessories for heat shrinkable cable heads 10 and under? Answer: the biggest characteristic is to use heat shrinkable accessories stress stress cone tube to replace the traditional one. It not only simplifies the construction process, also reduced the size of the terminal, connector installation convenient, time-saving and labor-saving, superior performance, save metal. The heat shrinkable cable accessories are assembled by pouring type and dry bag type, and the advantages of the two attachments are assembled.
11、电缆敷设前应进行哪些检查工作？
11. What inspection should be carried out before the cable laying?
答：
Answer:
(1)支架应齐全、油漆完整。
(1) the bracket should be complete and the paint is complete.
(2)电缆型号、电压、规格符合设计。
(2) cable type, voltage and specifications conform to the design.
(3)电缆绝缘良好，当对油纸电缆的密封有怀疑时，应进行受潮判断；直埋电缆与小底电缆应经直流耐压试难合格；充油电缆的油样应试验合格。
(3) the cable is well insulated. When there is doubt about the seal of the paper oil cable, the damp should be judged; the buried cable and the small bottom cable should be qualified by the DC voltage test, and the oil sample of the oil filled cable should be qualified.
(4)充油电缆的油压不宜低于1.47MPa。
(4) the oil pressure of the oil filled cable should not be lower than 1.47MPa.