Investigations on cavities inside liquid-immersed paper and pressboard insulation materials and their influence on the electrical behavior

verfasst von

V. Wasserberg, Matthias Krins, H. Borsi, Ernst Gockenbach

Abstract

Although the process of impregnating cellulosic materials with liquid insulants is well known and has been in use for many decades sometimes problems with gas-filled cavities inside the impregnated material still arise. Therefore extensive experimental investigations on the effects of gas-filled cavities inside an impregnated pressboard, like they appear after an imperfect impregnation, have been performed. The filling of hidden voids with the surrounding insulation liquid during and after the impregnation process was examined and the results are presented in this contribution. Using defined failures inside a transformerboard also the influence of these defects on the electrical behavior of the insulation in a semi-uniform field was simulated.

Organisationseinheit(en)

Fachgebiet Hochspannungstechnik und Asset Management (Schering-Institut)

Typ

Konferenzaufsatz in Fachzeitschrift

Journal

Conference Record of IEEE International Symposium on Electrical Insulation

Seiten

422-425

Anzahl der Seiten

4

ISSN

0164-2006

Publikationsdatum

2000

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Elektrotechnik und Elektronik, Bauwesen