Experimental study on influence of distribution line support system on flashover characteristics

Shozo Sekioka*, Tomoyuki Hayashi, Teru Miyazaki, Yoshiki Sakamoto, Shigemitsu Okabe

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)


This paper describes experimental results of flashover characteristics of medium-voltage insulators to support an insulated cable which is used in Japanese power distribution lines. The experimental study is targeted for direct lightning strokes to a shielding wire or top of a reinforced concrete pole in the distribution line. Lightning impulse voltage is applied to a metallic cross arm to represent the direct lightning stroke. 50% flashover voltage, voltage vs. flashover time characteristic and a photograph of the discharge are measured. This paper investigates the flashover characteristics of three types of cable support system such as suspension support, dead-end support and strain support. The flashover characteristics are dependent on the supporting system. Surface discharge on the insulated cable due to the flashover is observed, causes the discrepancy of the flashover characteristics. This paper presents constants in the integration method, which is a flashover model and can consider the influence of applied voltage waveform in order for accurate lightning surge analysis.

Original languageEnglish
Pages (from-to)566-574+3
JournalIEEJ Transactions on Power and Energy
Issue number6
Publication statusPublished - 2010 Jul 15
Externally publishedYes


  • Distribution line
  • Flashover
  • Insulated cable
  • Insulator
  • Lightning surge

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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