Influence of Temperature Aging on Oxidation Stability and Activation Energy of Insulating Liquids

Author

Mentli, V. ; Polansky, R. ; Prosr, P.

Author_Institution

Univ. of West Bohemia, Pilsen

fYear

2008

fDate

26-29 Oct. 2008

Firstpage

52

Lastpage

55

Abstract

Insulation liquids are mainly used in oil filled transformers for their cooling and insulating properties. Besides a testing of electrical properties, there is also important to monitor oxidation stability and activation energy as the factors which can decide on an application possibility of the insulating liquid. The main aim of this paper is to describe the influence of temperature aging on the oxidation stability and activation energy of tested insulating liquids (common petroleum based product and dioctyladipate - di(2-ethylhexyl) ester of adipic acid - synthetic based liquid). Both liquids were exposed to a longterm thermal aging at the temperature of 90degC for 3000 hours. A thermogravimetry was applied to determine the activation energy, oxidation stability tests were performed by differential scanning calorimetry.

Keywords

ageing; insulating materials; stability; transformer oil; activation energy; differential scanning calorimetry; electrical properties testing; insulating liquids; oil filled transformers; oxidation stability tests; temperature 90 degC; temperature aging; thermal aging; thermogravimetr; time 3000 hour; Aging; Cooling; Dielectric liquids; Oil insulation; Oxidation; Petroleum; Power transformer insulation; Stability; Temperature; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation and Dielectric Phenomena, 2008. CEIDP 2008. Annual Report Conference on

Conference_Location

Quebec, QC

Print_ISBN

978-1-4244-2548-8

Electronic_ISBN

978-1-4244-2549-5

Type

conf

DOI

10.1109/CEIDP.2008.4772789

Filename

4772789