Investigations concerning the impact of the water content on the flashover strength of different spacer materials in transformer oil

verfasst von

Matthias Krins, H. Borsi, Ernst Gockenbach

Abstract

This paper reports on experimental investigations dealing with the impact of different water contents on the electrical strength of oil gaps without and with a solid/liquid interface in a non-uniform electrical field. The measurements at AC stress reveal that an increase of the oil humidity can be combined with a marked reduction of the electrical strength which is especially pronounced for the open oil gap. For the configuration with a parallel solid/liquid interface the influence of the oil humidity on the flashover behavior depends significantly on the surface structure of the spacer material. Moreover it will be shown in the contribution that at negative lightning impulse stress a variation of the water content has a smaller impact on the electrical strength than at AC stress.

Organisationseinheit(en)

Fachgebiet Hochspannungstechnik und Asset Management (Schering-Institut)

Typ

Paper

Seiten

845-848

Anzahl der Seiten

4

Publikationsdatum

2000

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Elektronische, optische und magnetische Materialien, Physik der kondensierten Materie, Werkstoffchemie