Correlation between space charge distribution and water-tree location in aged XLPE cable

K. Suzuki, Y. Tanaka, T. Takada, Y. Ohki, C. Takeya*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)

Abstract

The correlation between charge distribution in an aged crosslinked polyethylene (XLPE) cable and the location of water trees has been studied. The space charge radial distribution at different angle in the insulating wall of a service-aged XLPE coaxial cable, induced by application of a dc stress, were measured using the pulsed electroacoustic (PEA) method. Furthermore, a cross section of sliced insulating wall was observed with an optical microscope to compare with the radial space charge distribution. The cable under investigation was electrically aged in service at 6.6 kV ac for 25 years in wet conditions. Water trees were found at the position in which space charge was observed. On the other hand, no water tree was found at the position in which the space charge was not observed. Judging from these results, the space charge measurement seems to be useful for the diagnosis of water trees in aged cables.

Original languageEnglish
Pages (from-to)78-81
Number of pages4
JournalIEEE Transactions on Dielectrics and Electrical Insulation
Volume8
Issue number1
DOIs
Publication statusPublished - 2001 Feb

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Fingerprint

Dive into the research topics of 'Correlation between space charge distribution and water-tree location in aged XLPE cable'. Together they form a unique fingerprint.

Cite this