Impact of Benzotriazole on the Degradation Performance of Ester Fluid

A. J. Amalanathan, R. Sarathi, N. Harid, H. Griffiths

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

4 Scopus citations


Ester fluids are now being widely considered as an alternative insulating liquid for application to transformers. One of the major reasons for internal flashover and fire hazards occurring in power transformers is due to static electrification. It is well known that benzotriazole (BTA) is used to suppress the charging tendency of insulating fluids at the pressboard interfaces. This paper addresses this issue and reports the results of an experimental investigation on the thermal degradation of ester fluid with and without the effect of BTA. The results show that addition of BTA to ester fluid upon degradation reduces the surface potential of pressboard material and dielectric dissipation factor (DDF) of fluid. The study also indicates a reduction in the flow current with degraded ester fluid containing BTA due to its neutralization of positive ions at the pressboard/fluid interface but the reduction in corona inception voltage (CIV) is inferred because of increased charge carrier formation.

Original languageBritish English
Title of host publication2021 Electrical Insulation Conference, EIC 2021
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages4
ISBN (Electronic)9781665415644
StatePublished - 2021
Event2021 Electrical Insulation Conference, EIC 2021 - Virtual, Online, United States
Duration: 7 Jun 202128 Jun 2021

Publication series

Name2021 Electrical Insulation Conference, EIC 2021


Conference2021 Electrical Insulation Conference, EIC 2021
Country/TerritoryUnited States
CityVirtual, Online


  • benzotriazole
  • diffusion
  • flow electrification
  • polarization
  • thermal degradation
  • trap energy


Dive into the research topics of 'Impact of Benzotriazole on the Degradation Performance of Ester Fluid'. Together they form a unique fingerprint.

Cite this