Influence of the material conditions on the breakdown behaviour of XLPE-samples at voltages of different shapes

authored by

Ernst Gockenbach, G. schiller

Abstract

Breakdown investigations at XLPE model cables were worked out at voltages of different shapes. The breakdown voltages are quite different. The highest breakdown voltage was measured at DC voltage with negative polarity and the lowest at AC voltage with 250 Hz. The DC strength is mostly influenced by the water content. While dry model cables have a very high breakdown strength up to 400 kV/mm, the value of wet model cables is approximately 80% of the former. If the model cables contain water trees, the DC breakdown strength is reduced further. The most sensitive voltage form in order to discover water trees is clearly the 0.1-Hz-AC-Voltage.

Organisation(s)

High Voltage Engineering and Asset Management Section (Schering Institute)

Type

Conference article

Journal

Conference Record of IEEE International Symposium on Electrical Insulation

Volume

2

Pages

608-611

No. of pages

4

ISSN

0164-2006

Publication date

1996

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

Electrical and Electronic Engineering, Building and Construction