Fault location in the outer sheath of power cables

  • Qian Wang State Grid Chongqing Electric Power Co. Chongqing Research Institute, Chongqing 401123, China
  • Chao Tang College of Engineering and Technology, Southwest University
  • Gaolin Wu State Grid Chongqing Electric Power Co. Chongqing Research Institute, Chongqing 401123, China
  • George Chen School of Electronics and Computer Science, University of Southampton, Southampton SO17 1BJ, United Kingdom


With the development of power systems in recent years, the total amount of power cables in operation hasincreased greatly, and there are growing reports of cable failure. Cable failures may be due to various intrinsicor extrinsic factors and can lead to massive economic loss. With regard to high-voltage cables, such as 110 kVpower cables, there are very few accurate reports on the actual fault observed. This article first analyses thepossible causes of power cable outer sheath failure. It then introduces the bridge and step voltage methods,which are traditionally used for cable fault locating, and describes a new method for accurate fault locatingin 110 kV cables, which uses the bridge method to pre-locate the fault and then the step voltage method toaccurately determine the precise fault locating. Field testing confirms the applicability of the new method foraccurate fault locating in 110 kV power cables. The results shown in this article may provide a good referencefor the development of future research in related fields.


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How to Cite
WANG, Qian et al. Fault location in the outer sheath of power cables. Journal of Power Technologies, [S.l.], v. 94, n. 4, p. 250--258, oct. 2014. ISSN 2083-4195. Available at: <https://papers.itc.pw.edu.pl/index.php/JPT/article/view/630>. Date accessed: 05 aug. 2021.
Energy Engineering and Technology


Power cable outer sheath, Fault locating, Bridge method, Step voltage method

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