Journal of Electrical Engineering & Technology

, Volume 14, Issue 1, pp 347–353 | Cite as

The Discharge Mechanism Leading to the Tracking Progress in Polyvinyl-Chloride-Sheathed Flat Cord

  • Seung-Wook Jee
  • Dong-Young Lim
  • Sungwoo Bae
  • Young-Kil ChoiEmail author
Original Article



This paper suggests the mechanism of the discharge phenomenon that leads to tracking progress.


For this purpose, a polyvinyl-chloride-sheathed flat cord (PVCSFC), which is widely used as a distribution cord, was employed and an artificial crack was intentionally made on the surface. Tracking was progressed using electrolyte droplets. The mechanism of the discharge phenomenon was suggested from the measurement and analysis of the current waveform.


As carbonization progressed during the tracking progress, the frequency of scintillation discharge also significantly increased. The mechanism for scintillation discharge during the tracking progress was based on the change in the electric field of the dry band, initial electron, electron avalanche, photoionization, secondary electron generation (electron detachment, photoemission, and secondary electron emission avalanche), space charge due to positive ions, and formation of conductive channels.


 This discharge mechanism could explain the physical phenomenon and change in the current waveform that occurs during the tracking progress.


Tracking breakdown Tracking phenomenon Tracking progress Scintillation discharge Discharge mechanism 



This work was supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) and the Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea (no. 20161210200560). In addition, this research was supported by Korea Electric Power Corporation (Grant number: R17XA05-19).


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Copyright information

© The Korean Institute of Electrical Engineers 2019

Authors and Affiliations

  • Seung-Wook Jee
    • 2
  • Dong-Young Lim
    • 3
  • Sungwoo Bae
    • 3
  • Young-Kil Choi
    • 1
    Email author
  1. 1.Department of Small and Medium Business SupportKorea Electrotechnology Research Institute (KERI)ChangwonKorea
  2. 2.Department of Fire Protection EngineeringKangwon National UniversitySamcheokKorea
  3. 3.Department of Electrical EngineeringHanyang UniversitySeoulKorea

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