Assessment of passivated mineral oil in mitigating the formation of copper sulphide in transformers

Author

Akshatha, A. ; Ravi, Kumar A. ; Rajan, J. ; Murthy, K. ; Viswanath, G.R. ; Ramachandra, Haricharan

Author_Institution

Central Power Res. Inst., Bangalore, India

fYear

2014

fDate

June 29 2014-July 3 2014

Firstpage

1

Lastpage

4

Abstract

This study was taken up to understand the variations in concentrations of metal passivators like Irgamet 39 and BTA which are added to mitigate the effects of corrosive sulphur in mineral oil. The study has shown that both BTA and Irgamet 39 are effective in arresting the formation of copper sulphide on conductors. The effect of thermal ageing of oil in presence of reactive species like MBT and DBDS on the concentrations of passivators has been studied and discussed in this paper.

Keywords

ageing; carbon compounds; copper compounds; passivation; power transformer insulation; sulphur; transformer oil; BTA; C₆H₅N₃; Cu₂S; DBDS; Irgamet 39; MBT; benzotriazole; copper sulphide; corrosive sulphur; dibenzyl disulphide; mercaptobenzothiozole; metal passivators; passivated mineral oil; thermal ageing; transformers; Aging; Conductors; Copper; DSL; Inductors; Nitrogen; Thermal conductivity; Benzothiazole (BTA); Copper sulphide; Dibenzyl disulphide (DBDS); Irgamet 39; Mercaptobenzothiozole (MBT); Passivators;

fLanguage

English

Publisher

ieee

Conference_Titel

Dielectric Liquids (ICDL), 2014 IEEE 18th International Conference on

Conference_Location

Bled

Type

conf

DOI

10.1109/ICDL.2014.6893137

Filename

6893137