Results 161 to 170 of about 1,761 (214)

Unused Mineral Insulating Oil

2019
The purpose of this chapter is to determine the characteristics and test methods of unused mineral oil containing additives or without additives used in transformers in which oil has been used as the insulator.
Behrooz Vahidi, Ashkan Teymouri
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The DC breakdown of mineral insulating oil and oil-pressboard

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, 2013
AC-DC converter transformer is one of the most important equipments in the high-voltage D.C. transmission system. And the mineral insulating oil and pressboard immersing in oil are important insulation dielectrics used in AC-DC converter transformers. Thus, it is very significant to understand the dielectric properties of the mineral insulating oil and
Li Huaqiang, Zhao Yaning, Zhong Lisheng, Yu Qinxue, Li Xu, Liu Guangqi, Shigekazu Mori, Shin Yamada   +7 more
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A Comparison of the Impregnation of Cellulose Insulation by Ester and Mineral oil

IEEE Transactions on Dielectrics and Electrical Insulation, 2008
Ester oils have been successfully used in distribution transformers for many years as satisfactory substitutes for mineral oil. In high voltage transformers however their application has been much slower partly due to the fact that the high viscosity of ester oil and hence uncertainties in efficient impregnation of cellulose insulation.
Dai, J., Wang, Z. D.
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In-Service Mineral Insulating Oil

2019
Mineral insulating oil is used in electrical equipment of power plants, transmission system and distribution systems. The quality of oil monitoring and maintaining are vital for oil-filled electrical equipment reliable operation. Therefore, operational solutions have been developed by the power generation and transmission companies.
Behrooz Vahidi, Ashkan Teymouri
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Ester oil as an alternative to mineral transformer insulating liquid

Materials Today: Proceedings, 2021
Abstract The function of oil used in large size transformers are cooling and insulation. Transformer oil must have certain properties like high dielectric strength, low viscosity, high flash point, very low moisture or water content, high specific resistance and many more.
Manish Srivastava, Sunil Kumar Goyal, Amit Saraswat   +2 more
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The Electrochemical Stability of Mineral Insulating Oils

2000
Successful detection of an incipient electrical failure within the windings of power transformers is based upon the possibility of determining the amount and nature of the gases evolved by the oil when subjected to the impact of a strong electric or thermal stress.
J Sabau, R Stokhuyzen
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Mineral insulating oil in transformers

IEEE Electrical Insulation Magazine, 1998
Nearly all load bearing transformers in electric power delivery systems around the world are filled with liquid. The liquid functions both as an electrical insulation and as a heat transfer fluid. The liquid in almost all of these units is transformer oil, petroleum-based insulating oil refined specifically to meet the requirements of this application.
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Research on streaming electrification of insulation mineral oil

2009 IEEE 9th International Conference on the Properties and Applications of Dielectric Materials, 2009
As we know, streaming electrification due to oil flow is an important phenomenon in power transformers particularly on those high rated voltage ones, and the study around it is still a challenge. In this paper, the streaming electrification characteristic of insulation mineral oil from Nynas was studied by using an improved mini-static tester to ...
null Shuangzan Ren, null Huaqiang Li, null Lisheng Zhong, null Qinxue Yu, null Chao Tang, null Hua Zhu, null Xiaolong Cao, Masahiro Hanai, Shin Yamada, Takeshi Imamura, Shigekazu Mori   +10 more
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New electrical insulating mineral oils

Conference on Electrical Insulation & Dielectric Phenomena - Annual Report 1976, 1976
Since World War I, electrical insulating oils for transformers and allied electrical equipment have been refined from naphthenic petroleum crude oil stocks. The resulting oils show little or no wax formation and have acceptable dielectric, mechanical and heat transfer properties at temperatures down to −40°C.
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Chemical Characterization of Transformer Mineral-Insulating Oils

Environmental Forensics, 2010
The chemical composition of a group of 14 refined naphthenic and paraffinic transformer-insulating oils and refinery-treated oils by hydrocracking and hydrotreating are compared with the composition of the starting untreated North Sea naphthenic crude oil.
Isaac R. Kaplan, Jimmy Rasco, Shan-Tan Lu   +2 more
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