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Electrical Aging of Insulation Oils [PDF]

2025 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)
In this investigation we have carried out a comparative electrical aging study of a natural ester, a synthetic ester, a bio-sourced hydrocarbon fluid and a conventional mineral oil. Repeated electrical discharges were applied to the oils and the resulting physical, chemical, and dielectric changes were characterized.
Hosier, Ian L., Lewin, Paul L., Andritsch, Thomas, Wilson, Gordon   +3 more
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Standards and insulation characteristics of oil-insulated transformers

Electrical Engineering, 1945
THE STRENGTH of the insulation in transformers to resist various types of voltage stress is very important. The service and life of the transformer is partially dependent on the insulation strength, and in recognition of this fact standards for insulation strength long have been established. In the course of time improvements have taken place in design,
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A SYMPOSIUM ON INSULATING OILS

Scientific Lubrication, 1958
A SYMPOSIUM ON INSULATING OILS was presented to The Institute of Petroleum on March 5th, under the Chairmanship of P. W. L. Gossling, whose introductory remarks took the form of a short review of the subject and the papers. Papers presented were as follows :—
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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 Oils for Transformers

2013
International ...
Beroual, Abderrahmane, Perrier, Christophe, Bessède, Jean-Luc   +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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The effects of insulator structure and insulating oil to charge accumulation in oil-immersed transformers

Proceedings of the 7th International Conference on Properties and Applications of Dielectric Materials (Cat. No.03CH37417), 2004
We directly measured the electric field in transformer oil/pressboard (PB) system under dc voltage using an electro-optic method by Kerr effect. We measured time variations and spatial distributions of electric field in the insulating oil. We measured them in both fresh oil/PB and degraded oil/PB composite systems to clarify the effect of material ...
M. Wakamatsu, K. Kato, H. Koide, H. Okubo   +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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Dielectric response of transformer insulation oils

2012 10th International Power & Energy Conference (IPEC), 2012
Dielectric diagnosis with polarization and depolarization currents (PDC) which employs the dielectric response of system in time domain is applied to investigate differences between PDC patterns produced by two types of transformer insulating fluids, mineral and bio-degradable oil.
M. Shareghi, Bao Toan Phung, Mohammad Salay Naderi, T. R. Blackburn   +3 more
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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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