Over 40 Years of Ester Dielectric Liquids for High-Voltage Transformers: A Retrospective on Evolution, Performance, and Future Prospects (An Extended report of the Hans Tropper Memorial Lecture 2025)
Abstract
This article reviews more than four decades of experience with ester-based insulating liquids in high-voltage power transformers, highlighting major milestones, performance advantages, technical challenges, and the evolving role of esters in enabling safer, more efficient, and environmentally sustainable power systems.
Fields of Study & Subjects
Power Transformer Diagnostics and Insulation
Dielectric materials and actuators
Magneto-Optical Properties and Applications
Publication details
- Journal / source
- IEEE Electrical Insulation Magazine
- Publisher
- Institute of Electrical and Electronics Engineers (IEEE)
- Volume
- 42
- Issue
- 2
- Pages
- 5–19
- Publication date
- 1 March 2026