Factors affecting transformer oil flow electrification in electric power apparatus

R. M. Radwan*, R. M. El-Dewieny, T. D. Aish, I. A.H. Metwally

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

5 Citations (Scopus)


The factors affecting the generation and accumulation of static charges due to oil flow are investigated and discussed. These factors are oil temperature, flow rate, type of electric field applied, moisture content, anti-static additives, aging, and type of material interfacing with oil. In addition, a comparison between the calculated and the measured values of the relative streaming currents is carried out. The streaming electrification phenomenon is shown to exist for both energized and unenergized systems, and the streaming current increases in proportion to the increase in both oil temperature and oil flow velocity, as well with applied electric field. The increase in frequency of the applied electric field reduces the charging tendency of the oil. The material of the rotating disk and oil aging have a pronounced effect on oil electrification.

Original languageEnglish
Pages (from-to)642-647
Number of pages6
JournalConference on Electrical Insulation and Dielectric Phenomena (CEIDP), Annual Report
Publication statusPublished - Oct 1990
Externally publishedYes
Event1990 Conference on Electrical Insulation and Dielectric Phenomena - Pocono Manor, PA, USA
Duration: Oct 28 1990Oct 31 1990

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Industrial and Manufacturing Engineering
  • Building and Construction


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