Comparison of AC dielectric tests of insulating liquids

This paper presents a study on the AC dielectric strength of insulating liquids. The nature of such information is necessary for the definition of the apparent dielectric strength of the liquid and to any further technical development, claiming the use of standard statistical analysis. The liquid, u...

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Bibliographic Details
Main Authors: Pennacchi, D, Cavallaro, J.B, Martinez, M.L.B
Format: Conference Proceeding
Language:English
Subjects:
Applied sciences
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Dielectric breakdown and discharges
Dielectric breakdown and space-charge effects
Dielectric properties of solids and liquids
Dielectrics, piezoelectrics, and ferroelectrics and their properties
Electrical engineering. Electrical power engineering
Exact sciences and technology
Materials
Organic insulation
Physics
Testing. Reliability. Quality control
Transformers and reactors
Voltage measurement
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Summary:This paper presents a study on the AC dielectric strength of insulating liquids. The nature of such information is necessary for the definition of the apparent dielectric strength of the liquid and to any further technical development, claiming the use of standard statistical analysis. The liquid, used in this study was a mineral oil applied as the main insulating media to instrument transformers. Tests are carried out according to several standards regulations and the results of the liquid breakdown voltage, mean value and standard deviation, are verified. The analysis of the data aim at the comparison of the results obtained when using different testing procedures, that apply the same electrode shape, and also to define the factors that influence the issued value of the breakdown voltage of an insulating liquid. (4 pages)
ISSN:0537-9989
DOI:10.1049/cp:19990767