Effect of antioxidants and metal deactivator on the oxidation of transformer oil

Author

Krishnamoorthy, P.R. ; Vijayakumari, S. ; Sankaralingam, S.

Author_Institution

Central Power Res. Inst., Bangalore, India

Volume

27

Issue

2

fYear

1992

fDate

4/1/1992 12:00:00 AM

Firstpage

271

Lastpage

277

Abstract

Comparative experimental data on the effectiveness of selected antioxidants and a metal deactivator in inhibiting the accelerated oxidation of reclaimed transformer oil are generated using the bomb oxidation apparatus. Energy of activation involved in the oxidation of uninhibited and inhibited oils deduced from the analysis of data are reported. Estimated lives of uninhibited and inhibited oils at the operating temperatures of transformers are also reported. Due to the difference in activation energies of inhibited oils, comparative assessment of inhibitors at a single temperature in the bomb oxidation apparatus as per standard appears to be insufficient. Among the range of antioxidants, i.e. monomeric and polymeric phenolic and aminic antioxidants chosen for study, the grading of only monomeric phenolic antioxidants seems to be consistent with temperature

Keywords

insulating oils; organic insulating materials; oxidation; transformer insulation; activation; antioxidants; inhibited oils; metal deactivator; monomeric phenolic antioxidants; oxidation; transformer oil; uninhibited oils; Inhibitors; Materials science and technology; Oil insulation; Oxidation; Petroleum; Powders; Power generation; Stability; Temperature; Weapons;

fLanguage

English

Journal_Title

Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

0018-9367

Type

jour

DOI

10.1109/14.135598

Filename

135598