Effects of different drying procedures on the composition of a liquid impregnated solid insulation

verfasst von

V. Wasserberg, Hossein Borsi, Ernst Gockenbach

Abstract

Although solid and gaseous insulations have become increasingly important during the last decades the application of insulating liquids together with cellulosic paper is still essential for many kinds of components like power transformers. A dominant risk, reducing the strength of such insulations, is water, thus sometimes drying procedures are required to extend lifetime and operation reliability. Actually transformer drying is in most cases performed as a maintenance action where it is tried to remove water by vacuum and beat. Such a procedure has to be performed offline and also comprises the risk of insulation endangerment. In this contribution some basic investigations on the reasons for the observed tendency for failures after a conventional drying of the solid insulation of an aged transformer are presented. Therefore the composition of an impregnated cellulosic insulation paper has been recorded during impregnation, accelerated aging and a drying as it is performed for a non-impregnated insulation.

Organisationseinheit(en)

Fachgebiet Hochspannungstechnik und Asset Management (Schering-Institut)

Typ

Konferenzaufsatz in Fachzeitschrift

Journal

Conference Record of IEEE International Symposium on Electrical Insulation

Seiten

346-349

Anzahl der Seiten

4

ISSN

0164-2006

Publikationsdatum

2002

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Elektrotechnik und Elektronik, Bauwesen