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Inhibited oils for transformers
Electrical Engineering, 1951ALLOWABLE AND actual loadings of transformers of the Commonwealth Edison Company have increased considerably in the past 15 years with consequent rises in transformer temperatures. Oils with improved oxidation stability have gained increased importance, especially for older type transformers in service.
Herman Halperin, H. A. Adler
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Corrosive Sulfur in Transformer Oil
2010 IEEE Industry Applications Society Annual Meeting, 2010Corrosive sulfur in transformer oil has been identified to cause sudden and unexpected failures of several transformers in recent years. It has been decades since corrosive sulfur has caused such problems. This paper discusses the problems caused by corrosive sulfur, why the problem has resurfaced, new test methods developed to detect corrosive sulfur,
Jill R. Smith, Pankaj Kumar Sen
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IEEE Transactions on Power Apparatus and Systems, 1972
Breakdown of transformer oil is affected not only by electrostatic field configurations, but also by many other factors. The latters make it difficult to predict break- down voltage from electrostatic field, as made for air and S F6 gaps. Alternatively, many experimenters tried to express the breakdown stress of oil as a function of stressed oil volume.
Y. Kawaguchi, H. Murata, M. Ikeda
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Breakdown of transformer oil is affected not only by electrostatic field configurations, but also by many other factors. The latters make it difficult to predict break- down voltage from electrostatic field, as made for air and S F6 gaps. Alternatively, many experimenters tried to express the breakdown stress of oil as a function of stressed oil volume.
Y. Kawaguchi, H. Murata, M. Ikeda
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The stability of oil in transformers
Journal of the Institution of Electrical Engineers, 1952The paper summarizes operating experience with transformer oils from the aspect of sludge formation and the increase of acidity with life, and it describes tests designed to study the correlation of increasing acidity found in service with predictions of performance based upon the Michie sludge test.
P.W.L. Gossling, L.H. Welch
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Overrefined Oils in Power Transformers
Transactions of the American Institute of Electrical Engineers, 1936Insulating oils ordinarily used in tramsformers have high stability toward oxidation, and much effort has been directed toward reducing the oxygen absorption qualities of such oils. Contrary to usual practice, however, the tests reported in this paper were made with a readily oxidizable or ``overrefined'' oil on the basis that the oxidizing qualities ...
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Performance of Inhibited Transformer Oils
1949 Conference on Electrical Insulation, 1949The fiftieth anniversary of the invention of the parallel connection of transformers (1) and of the transformer with closed magnetic circuit (2) was celebrated in 1935 (3). The first commercial transformer built on these principles was placed in operation in Budapest, Hungary, on May 1, 1885, by three Hungarian engineers, Zipernowsky, Déri, and Bláthy,
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Journal of the Institution of Electrical Engineers, 1952
Transformer oils usually serve well for many years, and often for the entire life of the transformer, but trouble still occurs from time to time through oxidation of the oil, which causes sludging and the formation of acids. Oxidation may be retarded by using an oxidationinhibited oil.
W.R. Stoker, C.N. Thompson
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Transformer oils usually serve well for many years, and often for the entire life of the transformer, but trouble still occurs from time to time through oxidation of the oil, which causes sludging and the formation of acids. Oxidation may be retarded by using an oxidationinhibited oil.
W.R. Stoker, C.N. Thompson
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The oxidation of transformer oil
Physica, 1936Summary For the experiments made by Ornstein, Janssen, Krijgsman and ter Horst1) another explanation of the measurements is given.
D.Th.J. Ter Horst, C. Krijgsman
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IEEE Electrical Insulation Magazine, 1990
Some of the factors affecting the dielectric strength of transformer oil are investigated. These factors include the stabilization phenomenon, oil and electrode pretreatment, the effect of oil velocity, the effect of a capacitance parallel to the test cell, and the effects of electrode area and gap spacing.
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Some of the factors affecting the dielectric strength of transformer oil are investigated. These factors include the stabilization phenomenon, oil and electrode pretreatment, the effect of oil velocity, the effect of a capacitance parallel to the test cell, and the effects of electrode area and gap spacing.
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Use of biobased oil's as a substitute of transformer oil
2016 IEEE 1st International Conference on Power Electronics, Intelligent Control and Energy Systems (ICPEICES), 2016A large number of transformers of various voltage and capacity ratings are used in distribution system. Large and medium capacity transformers use mineral oil for cooling. Small capacity transformers for outdoor application are oil filled whereas for indoor applications dry type or synthetic oil filled transformers are generally used.
Manjeet Singh Taneja +2 more
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