Results 31 to 40 of about 1,478,429 (232)
IEEE Access, 2020 In recent decades, moisture evaluation of transformer oil-immersed cellulose insulation has been widely studied by using the frequency domain spectroscopy (FDS) technique.
Jiefeng Liu +4 more
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Diagnosis of Oil Immersed Transformers by Colorimetry of Insulating Papers
IEEJ Transactions on Power and Energy, 1992 AbstractPower transformers have been expected to work with safety and reliability over a period of more than 30 years. The life expectancy of transformers depends upon the degree of deterioration of insulating materials, particularly conductor insulating paper.
Tsuruo Yorozuya +5 more
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Sensors, 2023 Power transformers are essential apparatuses used to transfer electrical energy from one voltage-level circuit to another. For reliable systems, preventive maintenance of the transformers is required to ensure good services of all mechanical, electrical,
Anantawat Kunakorn +4 more
doaj +1 more source
Carbon footprint of oil-immersed transformers
Transformers Magazine, 2023 Končar Distribution and Special Transformers, a company in Croatia, has recognized the importance of fighting climate change and reducing CO2 emissions. To quantify the environmental impact of their products, they have conducted carbon footprint studies based on the ISO 14067:2018 standard and used the life cycle assessment (LCA) method. The LCA covers
Kolarić, Ines, Šerkinić, Vlatka
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Increase of Static Electrification in an Aged Oil-Immersed Transformer
IEEJ Transactions on Power and Energy, 2007 AbstractIncrease of static electrification activity and discharge generation was experienced during the service operation of an aged power transformer. The transformer oil had high sulfide and sulfoxide contents and was liable to show high ECT value after aging.
Kobayashi, Takayuki +4 more
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Visual Localization of an Internal Inspection Robot for the Oil-Immersed Transformer
Journal of Robotics, 2023 Aiming at the problem that the robot is difficult to locate in the oil-immersed transformer, a visual positioning of the robot is proposed for internal inspection. First, in order to solve the problem of blur, distortion, and low contrast of the image obtained by the camera in the deteriorated and discolored transformer oil, an image enhancement ...
Yingbin Feng, Yahui Kou, Yanju Liu
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Effect of different shapes of electrodes on bridging in contaminated transformer oil [PDF]
, 2014 Contaminated transformer oil has been tested under non uniform electric fields and the effect of different electrode systems presented in this paper. Three different electric fields were examined i.e. DC, AC and DC biased AC.
Igor O. Golosnoy +9 more
core +1 more source
Analytical methods for assessing paper degradation In transformers [PDF]
, 2006 Power transformers are essential equipments for distributing electricity. However, maintenance of these equipments is necessary to ensure long working life and to avoid catastrophic incidents.
Christofidis, Stavros
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Recovery Voltage Measurements of Oil-immersed Transformer
Transactions on Electrical and Electronic Materials, 2006 One of the methods currently being investigated as a possible non-intrusive diagnostic tool for condition monitoring of power transformer and cable is the recovery voltage measurement, which will be improving the ability to detect the content of water concentration and the ageing process in the insulation system and may thus be an indicator of ...
Ming-Hua Li +3 more
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Evaluation of Lightning Impulse Test by Frequency Response Analysis [PDF]
, 2006 In this work are presented the basis for improving the interpretation of transformer lightning impulse test and the development of a graphical user interface system, which allows comparisons of time domain data and frequency response.
Jorge Ramirez +3 more
core +3 more sources