Results 261 to 270 of about 17,532 (305)

Corona measurements on oil-insulated transformers

Electrical Engineering, 1957
A description is given of a technique recently devised which permits the accurate determination of corona. With proper discrimination between external corona in air and internal corona in voids and corners under oil, quantitative measurements may be made on oil-insulated transformers.
E. J. Adolphson, F. J. Vogel
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Insulating Oil for Underwater Oil Production Equipment

Chemistry and Technology of Fuels and Oils, 2003
The problem of using electric insulating oils in underwater oil production equipment is examined. The results of comparative studies of the physicochemical and insulating properties and thermooxidative stability of domestic and foreign oils of this class are presented.
V. V. Grigor'ev, T. N. Shabalina, G. V. Surovskaya, I. I. Zanozina   +3 more
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Insulation Characteristic Analysis of Coconut Oil and Palm Oil as Liquid Insulating Material

International Journal of Simulation: Systems, Science & Technology, 2016
The paper presents a study which has been carried out to use coconut oil as insulation in transformers. In transformer, oil is used as a coolant and also as an insulator. Nowadays, petroleum based oil is widely used in the transformer as it meets the requirements to be the best insulator.
Mohd Jamail, Nor Akmal, Ishak, M. H., Muhamad, N.A.   +2 more
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Emergency Overloads for Oil-Insulated Transformers

Transactions of the American Institute of Electrical Engineers, 1942
IN 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
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D-C cleanup in insulating oils

Electrical Engineering, 1935
Three unusual types of behavior of insulating oils have been subjected to a series of experiments which indicate that all 3 are closely related. These types of behavior are the reduction of conductivity and a-c dielectric loss following a sustained application of continuous potential (called ``d-c cleanup''), the current-time relation under continuous ...
J. B. Whitehead, S. H. Shevki
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Insulating oil for cables

Journal of the Institution of Electrical Engineers - Part I: General, 1942
In this paper, an endeavour has been made to indicate the present position in this country of the insulating oils and compounds which are available for cables, and to describe their behaviour in impregnating plants.The oils are of the paraffinic and naphthenic types and either class may be used in oil-rosin compounds.
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Bioremediation of insulating oils

IEE Colloquium Insulating Liquids, 1999
Bioremediation is the process whereby naturally occurring micro-organisms are used to digest chemicals into harmless products such as carbon dioxide, water and microbial biomass. A wide range of chemicals can be degraded in this way including oils and greases.
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Environmentally friendly insulating oil

IEE Colloquium on Engineering and the Environment-how it affects you!, 1999
Due to environmental problems with PCBs, silicone oil and esters were developed as environmentally-friendly insulating oils. Today, mineral insulating oil is still being used because it offers the best compromise between cost and performance and also because of its compatibility with other materials used in the construction of power transformers. Other
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Internally insulated hot-oil pipelines

Applied Energy, 1983
Abstract Heavy-fuel oil is usually heated to facilitate its conveyance through pipelines. This paper presents the theoretical reasoning behind the prediction of the optimal thickness of insulant necessary for such a pipeline, so that the least energy running cost can be achieved.
S.D. Probert, C.Y. Chu
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Oil stresses in impregnated-paper insulation

Electrical Engineering, 1945
RECENT EXPERIMENT on fully impregnated cable-type paper insulation, has shown that under certain conditions use of a paper of low density results in a higher dielectric strength than does the use of a paper of higher density.1 It has also been shown that failure of such insulation usually begins in the oil channels between successive turns of paper ...
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