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primary topic: Effects of moisture content and temperature on the dielectric strength of transformer insulating oil

Effects of moisture content and temperature on the dielectric strength of transformer insulating oil
type: AcademicArticle
type: Article
abstract: The primary function of insulating oils is to dissipate heat and provide electrical insulation for turn-to-turn windings in power transformers. These oils also serve as a means to monitor the health status of power transformers. At present, most transformer failures are due to the presence of moisture as well as heat, oxidation, and electrical stresses. The main objective of this research was to study the effects of moisture content and temperature on the dielectric strength of transformer insulating oil, which is known be the factors that lead to transformer failures. The effect of moisture content was investigated by varying the amount of distilled water added into the insulating oil samples from 1 mL to 5 mL with 1-mL increments. The effect of temperature was investigated by increasing the oil temperature from 40°C to 120°C with 20°C increments. The dielectric strength of each insulating oil sample was assessed by performing AC breakdown voltage tests according to the MS IEC 60156:2012 standard. With the assistance of FTIR spectra revealed that the chemical compounds of transformer insulating oil were also affected (based on absorption band) due to the presence of moisture and temperature. Based on the results, it can be concluded that moisture and temperature have a significant effect on the dielectric strength and chemical compounds of transformer insulating oil. © 2019 PENERBIT AKADEMIA BARU.
date: 2019
volume: 63
issue: 1
is part of: Journal of Advanced Research in Fluid Mechanics and Thermal Sciences
status: peerReviewed
status: published
author list: authors
type: EPrint
type: ArticleEPrint
is part of: repository

Penerbit Akademia Baru
type: Organization

Journal of Advanced Research in Fluid Mechanics and Thermal Sciences
type: Collection
issn: 22897879

Sharin Ab Ghani
type: Person
given name: Sharin Ab
family name: Ghani

Imran Sutan Chairul
type: Person
given name: Imran Sutan
family name: Chairul

Norazhar Abu Bakar
type: Person
given name: Norazhar Abu
family name: Bakar

Mohd Shahril Ahmad Khiar
type: Person
given name: Mohd Shahril Ahmad
family name: Khiar

Nur Hakimah Ab Aziz
type: Person
given name: Nur Hakimah Ab
family name: Aziz

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primary topic: Effects of moisture content and temperature on the dielectric strength of transformer insulating oil