Discharge current method-a test procedure for plastic-insulated medium-voltage cables

Author

Muhr, Michael ; Woschitz, Rudolf

Author_Institution

Inst. fur Hochspannungstech. mit Versuchsanstalt, Tech. Univ. Graz, Austria

Volume

5

fYear

1999

fDate

1999

Firstpage

98

Abstract

The diagnostic method for medium voltage cables based on the method of discharge current is an integral measurement technique, which means that the dielectric properties of an insulating material can only be measured in general, singular vacancies cannot be detected. The nonlinear correlation between charging voltage and discharge current is a criterion for the state of ageing of the insulating material and gives information about its condition. The authors briefly discuss the determination of ageing of plastic insulated cables and the course of measures as follows: period of charge; period of self-discharge; and period of discharge

Keywords

power cable testing; ageing; charge period; charging voltage; diagnostic method; discharge current; discharge current measurement; discharge period; insulating material; integral measurement technique; nonlinear correlation; plastic-insulated medium-voltage cables; self-discharge period; singular vacancies;

fLanguage

English

Publisher

iet

Conference_Titel

High Voltage Engineering, 1999. Eleventh International Symposium on (Conf. Publ. No. 467)

Conference_Location

London

ISSN

0537-9989

Print_ISBN

0-85296-719-5

Type

conf

DOI

10.1049/cp:19990895

Filename

818247