Optical observation of pre-breakdown and breakdown phenomena in transformer oil
- 11 September 1977
- journal article
- Published by IOP Publishing in Journal of Physics D: Applied Physics
- Vol. 10 (13) , 1753-1760
- https://doi.org/10.1088/0022-3727/10/13/010
Abstract
High-speed time-resolved Schlieren photographs are taken between impulse voltage application and breakdown in transformer oil using an image convertor camera at various applied voltages and framing speeds. Needle-to-plate electrodes are used and the oil is under vacuum. The pre-breakdown disturbance accompanied by shock waves emanates from the needle electrode for both polarities of the needle point. The disturbance from the negative point propagates step by step like a lightning discharge in air, while that from the positive point moves radially and reaches the plate electrode in one step. The pre-breakdown disturbance seems to be a gaseous phase which is generated in the liquid.Keywords
This publication has 9 references indexed in Scilit:
- Prebreakdown phenomena in liquids: electronic processesJournal of Physics D: Applied Physics, 1976
- Evidence for cavitation in fluorocarbon liquids subjected to alternating electric fieldsJournal of Physics D: Applied Physics, 1976
- Study of prebreakdown phenomena in a liquid using a gas bubble chamberJournal of Applied Physics, 1974
- Prebreakdown phenomena in transformer oil subjected to nonuniform fieldsProceedings of the Institution of Electrical Engineers, 1974
- Techniques used to photograph the breakdown of a dielectric liquid with picosecond time resolutionOptical and Quantum Electronics, 1972
- Prebreakdown events in dielectric liquidsProceedings of the Institution of Electrical Engineers, 1972
- The generation of gases in the dielectric breakdown of oilJournal of Physics D: Applied Physics, 1970
- A pre-breakdown phenomenon in the liquid dielectric hexaneBritish Journal of Applied Physics, 1965
- Dielectric breakdown of insulating liquidsBritish Journal of Applied Physics, 1964