Electrical Properties of Liquid Insulation Oil under Varying Electrode Shapes and Temperatures

Tae-Hee Kim; Seo Yeon An; Geun Ho Gim

doi:10.3740/MRSK.2026.36.1.26

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2026 Vol.36, Issue 1 Preview Page Next Page

Research Paper

Electrical Properties of Liquid Insulation Oil under Varying Electrode Shapes and Temperatures

27 January 2026. pp. 26-30

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Abstract

In this paper, considering the temperature characteristics relevant to the climatic conditions of our country, an experimental study was conducted to investigate whether the electrical characteristics of transformer insulating oil vary with changes in electrode configuration and temperature. To achieve this objective, three representative electrode types—the sphere electrode, the plate electrode, and the needle electrode—were selected to simulate the different electric field distributions commonly encountered in transformer systems. Based on these electrode types, six electrode combinations were examined: sphere-sphere, plate-plate, sphere-plate, needle-needle, sphere-needle, and needle-plate configurations. To evaluate the influence of gap spacing on insulation performance for each electrode combination, the distance between electrodes was systematically adjusted in four incremental steps of 1.5, 2.0, 2.5 and 3.0 mm. Furthermore, the ambient temperature of the insulating oil was varied at four levels 0, 10, 20 and 30 °C, to reflect typical operating and environmental conditions. The electrical properties under these conditions were analyzed to determine the combined effects of electrode geometry and temperature variation on the insulating characteristics of transformer insulating oil.

Keywords

insulating oil

electrode shape

electrode gap

temperature

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Information

Publisher :Materials Research Society of Korea
Publisher(Ko) :한국재료학회
Journal Title :Korean Journal of Materials Research
Journal Title(Ko) :한국재료학회지
Volume : 36
No :1
Pages :26-30
Received Date : 2025-11-18
Revised Date : 2025-12-26
Accepted Date : 2025-12-31
DOI :https://doi.org/10.3740/MRSK.2026.36.1.26

Korean Journal of Materials Research ISSN:1225-0562(Print) 2287-7258(Online) 한국재료학회지

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