NDLI: Location and examination of defects in XLPE cable insulation

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Location and examination of defects in XLPE cable insulation

Content Provider	IEEE Xplore Digital Library
Author	Hagen, S.T. Ildstad, E. Sletbak, J. Faremo, H.
Copyright Year	1989
Description	Author affiliation: Norwegian Inst. of Technol., Trondheim, Norway (Hagen, S.T.; Ildstad, E.; Sletbak, J.)
Abstract	After breakdown testing of a cable it is difficult to identify the cause of the breakdown, because the insulation in the region of breakdown is usually heavily damaged. The authors describe an approach in which the insulation from cables extruded under normal conditions is peeled to form continuous lengths of thin tape. Results from AC breakdown tests of these tapes and microscopic and elemental analysis of detected weak sites are presented. The density, size, and radial position of the sites were measured. The results indicate that this technique can be used to find explanations of the lower breakdown stress of cable insulation compared to the strength of insulating material measured under laboratory conditions. The number of weak insulation sites in 12-kV XLPE (cross-linked polyethylene) cables was found to vary across the insulation wall, with the highest density in a region close to the conductor screen.<>
Starting Page	569
Ending Page	573
File Size	261579
Page Count	5
File Format	PDF
DOI	10.1109/ICSD.1989.69261
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1989-07-03
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Cable insulation Electric breakdown Cables Conducting materials Insulation testing Microscopy Density measurement Position measurement Size measurement Stress
Content Type	Text
Resource Type	Article

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