Publication detail

Dielectric Behaviour of High-Temperature Mica Insulation Exposed to Electrical Stress

LIEDERMANN, K., FRK, M.

Original Title

Dielectric Behaviour of High-Temperature Mica Insulation Exposed to Electrical Stress

English Title

Dielectric Behaviour of High-Temperature Mica Insulation Exposed to Electrical Stress

Type

conference paper

Language

en

Original Abstract

The paper deals with dielectric studies of aging phenomena in commercially used high-temperature mica insulations. Insulation samples stressed by electric fields ranging from 10 kV/mm to 16,7 kV/mm were aged for up to 280 hours. The objective of the analysis was to examine whether the electrical breakdown, which is a pronounced localized event, is preceded by changes of bulk material properties – frequency and temperature dependence of the complex permittivity. The measurements carried out so far show the presence of at least one relaxation process and one conduction process. Both mechanisms depend strongly on temperature but they seem to be very little affected by electrical stress. Experimental results are analyzed and their potential implications for material diagnostics are discussed.

English abstract

The paper deals with dielectric studies of aging phenomena in commercially used high-temperature mica insulations. Insulation samples stressed by electric fields ranging from 10 kV/mm to 16,7 kV/mm were aged for up to 280 hours. The objective of the analysis was to examine whether the electrical breakdown, which is a pronounced localized event, is preceded by changes of bulk material properties – frequency and temperature dependence of the complex permittivity. The measurements carried out so far show the presence of at least one relaxation process and one conduction process. Both mechanisms depend strongly on temperature but they seem to be very little affected by electrical stress. Experimental results are analyzed and their potential implications for material diagnostics are discussed.

RIV year

2004

Released

11.11.2004

Publisher

Department of Physics, FEEC, Brno University of Technology

Location

Brno

ISBN

80-7355-024-5

Book

Proceedings of the conference NTF 2004 (New Trends in Physics)

Edition number

1

Pages from

68

Pages to

71

Pages count

4

URL

technické knihovny

Documents

BibTex


@inproceedings{BUT12073,
  author="Karel {Liedermann} and Martin {Frk}",
  title="Dielectric Behaviour of High-Temperature Mica Insulation Exposed to Electrical Stress",
  annote="The paper deals with dielectric studies of aging phenomena in commercially used high-temperature mica insulations. Insulation samples stressed by electric fields ranging from 10 kV/mm to 16,7 kV/mm were aged for up to 280 hours. The objective of the analysis was to examine whether the electrical breakdown, which is a pronounced localized event, is preceded by changes of bulk material properties – frequency and temperature dependence of the complex permittivity. The measurements carried out so far show the presence of at least one relaxation process and one conduction process. Both mechanisms depend strongly on temperature but they seem to be very little affected by electrical stress. Experimental results are analyzed and their potential implications for material diagnostics are discussed.",
  address="Department of Physics, FEEC, Brno University of Technology",
  booktitle="Proceedings of the conference NTF 2004 (New Trends in Physics)",
  chapter="12073",
  institution="Department of Physics, FEEC, Brno University of Technology",
  year="2004",
  month="november",
  pages="68",
  publisher="Department of Physics, FEEC, Brno University of Technology",
  type="conference paper"
}