Results 11 to 20 of about 1,761 (214)

A Novel Method for the Deterioration State Evaluation of Mineral Insulating Oil by THz Time-Domain Spectroscopy

open access: yesIEEE Access, 2019
The operating life of power transformers is determined by the insulation state of the transformer insulating materials, which has been widely recognized.
Liang Wang   +4 more
doaj   +1 more source

Dielectric relaxation response of electrical insulating liquids under different natures of thermal stress

open access: yesJournal of Materials Research and Technology, 2023
This study focuses on the dielectric relaxation response of insulating liquids based on mineral oil and synthetic ester in a thermal field.The research also offers the dielectric relaxation response of the magnetic nanofluid based on the investigated ...
Peter Havran   +6 more
doaj   +1 more source

Electrostatic Charging Tendency Analysis Concerning Retrofilling Power Transformers with Envirotemp FR3 Natural Ester

open access: yesEnergies, 2020
Natural and synthetic esters are liquids characterized by insulating properties, high flash point, and biodegradability. For this reason, they are more and more often used as an alternative to conventional mineral oils.
Maciej Zdanowski
doaj   +1 more source

Performance Comparison and Selection of Transformer Fluid

open access: yesMATEC Web of Conferences, 2016
Transformer fluid directly affects the working state of the components and the cooling efficiency of transformer. There are three kinds of transformer fluid used for electric locomotive, EMU and suburban rail vehicles: mineral oil, silicone liquid and ...
Lu Yang, Liu Shi Jia
doaj   +1 more source

Comparison of Dissolved Gases in Mineral and Vegetable Insulating Oils under Typical Electrical and Thermal Faults

open access: yesEnergies, 2016
Dissolved gas analysis (DGA) is attracting greater and greater interest from researchers as a fault diagnostic tool for power transformers filled with vegetable insulating oils.
Chenmeng Xiang   +5 more
doaj   +1 more source

Polarization and Conduction Characteristics of Mineral Oil and Natural Ester Mixed with Nanoparticles

open access: yesAdvances in Materials Science and Engineering, 2022
Mineral oil (MO) has been widely used in transformers because of its reasonable price and acceptable properties. Currently, alternative liquid insulations have been proposed with some excellent properties.
Sakda Maneerot   +4 more
doaj   +1 more source

Influence of Mineral Oil-Based Nanofluids on the Temperature Distribution and Generated Heat Energy Inside Minimum Oil Circuit Breaker in Making Process

open access: yesNanomaterials, 2023
The enhancement of the thermal properties of insulating oils has positively reflected on the performance of the electrical equipment that contains these oils. Nanomaterial science plays an influential role in enhancing the different properties of liquids,
Hesham S. Karaman   +4 more
doaj   +1 more source

Electronic Properties of Typical Molecules and the Discharge Mechanism of Vegetable and Mineral Insulating Oils

open access: yesEnergies, 2018
Vegetable insulating oil may replace the mineral insulating oil used in large power transformers due to its extraordinary biodegradability and fire resistance.
Yachao Wang   +4 more
doaj   +1 more source

Thermally Accelerated Aging of Insulation Paper for Transformers with Different Insulating Liquids

open access: yesEnergies, 2021
The article presents issues related to the aging behavior of oil-paper insulations in transformers using different oil- and ester-based insulating fluids.
Tobias Münster   +3 more
doaj   +1 more source

Correlation of hydrogen generation with sparking discharges in a mineral insulating oil [PDF]

open access: yesIEEE Electrical Insulation Magazine, 2018
© 2006 IEEE. Dissolved gas analysis (DGA) of transformer oil is one of the key methods of assessing transformer health [1]. Transformers operate under multiple stresses, e.g., thermal, electrical, and mechanical. The hydrocarbon molecules of transformer oils can be degraded into combustible and incombustible gases under high thermal and electrical ...
Xiang, Jing   +5 more
openaire   +1 more source

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