Influence of Specimen Size on the Dielectric Strength of Transformer Oil
- 1 August 1977
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Electrical Insulation
- Vol. EI-12 (4) , 281-292
- https://doi.org/10.1109/tei.1977.297980
Abstract
The results of some specimen size effect experiments on technical grade transformer oil are reported. Four electrode areas (1.77, 8.19, 37.9 and 177 cm2) and four gap spacings (0 .215 0.464, 1.0 and 2.15 mm) were investigated using a fast ramp (5.5 x 1012 V.cm-1.sec-1) and an ac ramp (12 kV. cm-1.sec-1). Whilst the results are in general agreement with weak link theories, it is suggested that physical specimen size factors play a significant part. Examples of physical size factors are spark conditioning, electrode profile, and liquid motion.Keywords
This publication has 12 references indexed in Scilit:
- Breakdown of Transformer OilIEEE Transactions on Power Apparatus and Systems, 1972
- Electric strength of transformer oil for large electrode areasProceedings of the Institution of Electrical Engineers, 1971
- Time-Dependent Pressure Effect in Liquid DielectricsIEEE Transactions on Electrical Insulation, 1970
- Electric strength of transformer insulationProceedings of the Institution of Electrical Engineers, 1969
- Statistical nature of breakdown sequences in a liquid insulantProceedings of the Institution of Electrical Engineers, 1966
- A statistical interpretation of the electrical breakdown of liquid dielectricsProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1962
- The breakdown of transformer oil under impulse voltagesProceedings of the IEE - Part A: Power Engineering, 1958
- Extremal Area Effect for Large Area Electrodes for the Electric Breakdown of Transformer OilTransactions of the American Institute of Electrical Engineers. Part III: Power Apparatus and Systems, 1957
- Electrode Area Effect for the Impulse Breakdown of Transformer OilTransactions of the American Institute of Electrical Engineers. Part III: Power Apparatus and Systems, 1957
- Calibration of uniform-field spark-gaps for high-voltage measurement at power frequenciesJournal of the Institution of Electrical Engineers - Part I: General, 1947