Influence of a solid/liquid interface on electric conduction characteristics under nonuniform field in transformer oil
✍ Scribed by Ryoichi Hanaoka; Masaichi Kumazaki; Toshiyuki Kohrin; Tomokazu Miyagawa
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 154 KB
- Volume
- 123
- Category
- Article
- ISSN
- 0424-7760
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✦ Synopsis
Electric conduction in transformer oil is significantly affected by the presence of a solid/liquid interface. Using a bladeplane electrode geometry, the influence of an insulator inserted along the plane of symmetry of an electrode gap on conduction currents in transformer oil was investigated. Although the stationary relationship between current I and voltage V always showed linear plots of V versus I 1/3 , conduction currents were prominently decreased by the presence of the insulator. This reduction of current is discussed based on electrohydrodynamic (EHD) motion and the electric field of the blade edge, taking the insulator surface charging into account.