Influence of Electrodes Coating with Thin Layers on the Injection Phenomena in Transformer Oils - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Archives of Electrical Engineering Année : 2008

Influence of Electrodes Coating with Thin Layers on the Injection Phenomena in Transformer Oils

Résumé

This work reports on the influence of electrodes coating with thin layers of different materials, on the injection phenomena in unused (fresh) and used (aged) transformer oils. The investigations are achieved with a sphere-plane electrode system. The thin layers are deposits of polytetraflu-oroethylene (Teflon), Silicon oxide and Silicon nitride. It is shown that these deposits limit the accumulation of charges in the undercoat leading to the change of the structure of diffuse layer and to a limitation of the ionic injection processes. The electrode coating with thin layer of Teflon reduces significantly the ionic injection phenomenon. The highest values of the current were measured when the sphere is positive indicating the dominant role of anode in the injection mechanism in mineral oils.
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Dates et versions

hal-00369267 , version 1 (18-03-2009)

Identifiants

  • HAL Id : hal-00369267 , version 1

Citer

Abderrahmane Beroual, Janusz Fleszyński. Influence of Electrodes Coating with Thin Layers on the Injection Phenomena in Transformer Oils. Archives of Electrical Engineering, 2008, LVII (223 1), pp.41-55. ⟨hal-00369267⟩
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