Surface discharges on epoxy resin model post insulators initiated by moisture layers with low layer conductivity

Author

König, D. ; Rösch, P.

Author_Institution

High Voltage Lab., Tech. Univ. of Darmstadt, West Germany

fYear

1988

fDate

5-8 June 1988

Firstpage

54

Lastpage

59

Abstract

Moisture layers with low layer conductivity are characterized by a low layer power (<50 mW) for the epoxy-resin-model post insulator under investigation. Under this condition no temperature-related dry zones appear, but partial microdischarges can occur, depending on the voltage stress, the surface properties and the relevant climatic conditions. Experiments under well-controlled conditions have been performed. The typical pattern of the partial-discharge behavior was established and simulated with the help of simplified equivalent circuit diagrams.<>

Keywords

environmental testing; equivalent circuits; insulators; partial discharges; surface discharges; 50 mW; climatic conditions; epoxy resin model post insulators; equivalent circuits; low layer conductivity; moisture layers; partial microdischarges; partial-discharge behavior; simplified equivalent circuit diagrams; surface discharges; surface properties; voltage stress; Aging; Conductivity; Epoxy resins; Flashover; Humidity; Insulation; Moisture; Partial discharges; Surface discharges; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation, 1988., Conference Record of the 1988 IEEE International Symposium on

Conference_Location

Cambridge, MA, USA

ISSN

1089-084X

Type

conf

DOI

10.1109/ELINSL.1988.13865

Filename

13865