Remaining service life diagnostic technology of phenol insulators for power distribution equipment

S. Miki, T. Hasegawa, S. Umemura, H. Okazawa, Y. Otsuka, H. Inujima

Research output: Contribution to journalConference article


We have applied a remaining service life diagnostic technology to phenol insulators of power distribution equipment. Application of chemical evaluation and the Mahalanobis-Taguchi (MT) method enabled us to diagnose the insulators' degree of deterioration with great accuracy and nondestructively on-site. Time was defined as the end of service life when electrical discharge was initiated and a remaining service life was presumed from the diagnostic results by the MT method and the year in which the master curve of service life and the threshold value intersect. Surface resistivity (threshold value) for electrical discharge initiation can be calculated from creepage distance, permittivity, frequency, etc.. It was clarified that a remaining service life for phenol insulators could be presumed by this technology because there was a good relationship between the check examination results of electric discharge initiation in the laboratory and the presumption results.

Original languageEnglish
Article number4451467
Pages (from-to)41-44
Number of pages4
JournalAnnual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP
Publication statusPublished - 2007 Dec 1
Event2007 Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP - Vancouver, BC, Canada
Duration: 2007 Oct 142007 Oct 19


ASJC Scopus subject areas

  • Engineering(all)
  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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