Results 41 to 50 of about 3,337,621 (340)

Performance Comparison and Selection of Transformer Fluid

MATEC 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

Comparative Study of Breakdown Voltage of Mineral, Synthetic and Natural Oils and Based Mineral Oil Mixtures under AC and DC Voltages

Energies, 2017
This paper deals with a comparative study of AC and DC breakdown voltages of based mineral oil mixtures with natural and synthetic esters mainly used in high voltage power transformers.
Abderrahmane Beroual, Usama Khaled, Phanuel Seraphine Mbolo Noah, Henry Sitorus   +3 more
doaj   +1 more source

Mobility of charge carriers in mineral oil and ester fluids

High Voltage, 2021
New, more stringent environmental requirements for electrical insulation liquids have led to the development of novel, more environment‐friendly liquid dielectrics. Ester fluids, introduced several decades ago, provide a viable alternative to traditional
Qingjiang Xue, Igor Timoshkin, Mark P. Wilson, Martin Given, Scott J. MacGregor   +4 more
doaj   +1 more source

Mechanism and Application of Baker–Venkataraman O→C Acyl Migration Reactions [PDF]

, 2014
This literature review focuses on the O→C acyl migration of aryl esters to yield the corresponding 1,3-dicarbonyl products—a reaction known as the Baker–Venkataraman rearrangement—and outlines their subsequent transformations.
Ameen, Dana, Snape, Timothy James
core   +1 more source

Cellulose Ester Insulation of Power Transformers: Researching the Influence of Moisture on the Phase Shift Angle and Admittance

Energies, 2020
This study investigates the frequency–temperature relations between the phase angle φ and admittance Y for composites of cellulose, synthetic ester, and water nanoparticles.
Pawel Zukowski, Przemyslaw Rogalski, Tomasz N. Koltunowicz, Konrad Kierczynski, Jan Subocz, Marek Zenker   +5 more
doaj   +1 more source

New Synthetic Cannabinoids Metabolism and Strategies to Best Identify Optimal Marker Metabolites. [PDF]

, 2019
Synthetic cannabinoids (SCs) were initially developed as pharmacological tools to probe the endocannabinoid system and as novel pharmacotherapies, but are now highly abused.
Diao, Xingxing, Huestis, Marilyn A.
core   +2 more sources

Assessment of Concentration of Mineral Oil in Synthetic Ester Based on the Density of the Mixture and the Capacitance of the Capacitor Immersed in It

Energies, 2021
This research was carried out during the realization of a project with the aim of developing a method of drying cellulose insulation in power transformers by using synthetic ester.
Hubert Moranda, Jaroslaw Gielniak, Ireneusz Kownacki   +2 more
doaj   +1 more source

Aging assessment of synthetic ester impregnated thermally non-upgraded kraft paper through chemical markers in oil

IEEE Transactions on Dielectrics and Electrical Insulation, 2018
S. Matharage, Q. Liu, Z.D. Wang, G. Wilson, C. Krause   +4 more
semanticscholar   +3 more sources

Effects of biofuels properties on aircraft engine performance [PDF]

, 2015
Purpose-The purpose of this paper is to examine the effects of heat capacity and density of biofuels on aircraft engine performance indicated by thrust and fuel consumption.
Kipouros, Timos, Mazlan, Nurul Musfirah, Savill, Mark A.   +2 more
core   +1 more source

Bubble Effect Phenomenon in Modern Transformer Insulation Systems Using Aramid-Based Materials and Alternative Insulating Liquids

Energies, 2023
One of the possible causes of transformer failures is high moisture in the winding insulation system. In an extreme case, when the critical temperature is exceeded, a sudden release of water vapor from the transformer insulation, called the bubble effect,
Kamil Lewandowski, Hubert Moranda, Radoslaw Szewczyk   +2 more
doaj   +1 more source