Thermally upgraded insulation in transformers

Author

Prevost, Thomas A.

Author_Institution

EHV Weidmann Ind., St. Johnsbury, VT

fYear

2005

fDate

26-26 Oct. 2005

Firstpage

120

Lastpage

125

Abstract

This paper will review the development of thermally upgraded paper. It will discuss the various chemical modifications developed and give the current processes used today. It will review current standards activities which deal with thermally upgraded insulation systems and their impact on the recommended loading practices of transformers. It will also review the effect of thermal upgraded insulations on diagnostic techniques such as gas-in oil analysis of furanic compounds and their indication of insulation degradation. Finally recent aging tests will be presented which correlate aging rates as a function of the degree of thermal upgrading measured by the nitrogen content of the paper

Keywords

ageing; insulation testing; nitrogen; paper; thermal insulation; transformer insulation; transformer testing; aging test; furanic compound; gas-in oil analysis; nitrogen; thermally upgraded paper; transformer insulation degradation; Aging; Chemical processes; Gas insulation; Oil insulation; Petroleum; Power transformer insulation; Standards activities; Testing; Thermal degradation; Thermal loading;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation Conference and Electrical Manufacturing Expo, 2005. Proceedings

Conference_Location

Indianapolis, IN

Print_ISBN

0-7803-9145-4

Type

conf

DOI

10.1109/EEIC.2005.1566272

Filename

1566272