Results 301 to 310 of about 74,955 (336)
Some of the next articles are maybe not open access.
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
openaire +1 more source
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
openaire +1 more source
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
openaire +1 more source
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
openaire +1 more source
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
openaire +1 more source
Transformer oil condition monitoring
IEE Colloquium Transformer Life Management, 1998Since transformer oils are a vital part of the insulation system, they require regular checking. Oil condition monitoring plays a vital role in assessing plant status and integrity and also in estimating remanent life of the units. It needs to be carried out on a regular basis so that oil deterioration can be detected at an early stage.
B. Pahlavanpour, I.A. Roberts
openaire +1 more source
Transformer oil preservation methods
Electrical Engineering, 1958IN ALL COMMONLY USED SYSTEMS of oil preservation for power transformers, the oil surface is exposed to a gas, either air as with a conservator system or nitrogen if the automatic-gas-seal system is used. Where a gas and a liquid are in such contact, some of the gas dissolves into the liquid, the quantity depending upon the kind of gas and liquid and ...
R. B. Kaufman, J. L. Pierce, E. R. Uhlig
openaire +1 more source
Transforming Oil Tracer Studies
SPE Kingdom of Saudi Arabia Annual Technical Symposium and Exhibition, 2016Abstract Chemical and radioactive tracers have been used for decades in the oil industry to track injected fluids to map inter-well permeable paths (as passive tracers) and as active tracers to identify reservoirs that are specifically suited for EOR operations by detecting residual oil saturation.
Erika S Ellis +2 more
openaire +1 more source
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.
openaire +1 more source
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.
openaire +1 more source
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 ...
openaire +1 more source
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,
openaire +1 more source
Emergency Overloads for Oil-Insulated Transformers
Transactions of the American Institute of Electrical Engineers, 1942IN periods of high industrial activity transformer loads are generally high, and it is essential that operators know what overloads they can carry safely in emergencies. In order to do this effectively, it is necessary to know what temperatures will be reached after various overloads for different durations of time and the effects of temperature and ...
F. J. Vogel, T. K. Sloat
openaire +1 more source