Conduction current in insulating oils: components and parameters

Author

Elshazly-Zaghloul, M.

Author_Institution

Dept. of Electr. Eng., Cairo Univ., Egypt

Volume

26

Issue

6

fYear

1991

fDate

12/1/1991 12:00:00 AM

Firstpage

1220

Lastpage

1223

Abstract

The author studies experimentally the effects of the gap length, electrode shape, and electrode metal on the conduction current, for different types of dielectric liquids. The current waveform, in each case, is recorded using a short rise-time digital oscilloscope. Samples of these oscillograms are presented and discussed. A comparative study of the whole host of current oscillograms is carried out and presented, for each type of oil and collectively. The conduction current is suggested to be composed of two components: continuous and (spike) group. The continuous component is voltage independent. The group component has three parameters that characterize it: peak-to-peak, number of spikes, and time interval. This component is voltage dependent. The effects of the gap length, electrode shape, and electrode metal on each of the components and parameters of the conduction current are analyzed and discussed

Keywords

dielectric measurement; electric current measurement; electrical conductivity of liquids; insulating oils; conduction current; dielectric liquids; electrode metal; electrode shape; gap length; insulating oils; short rise-time digital oscilloscope; spikes; time interval; voltage dependent; Aluminum; Breakdown voltage; Conducting materials; Dielectrics and electrical insulation; Electrodes; Oil insulation; Petroleum; Power transformer insulation; Shape control; Surface finishing;

fLanguage

English

Journal_Title

Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

0018-9367

Type

jour

DOI

10.1109/14.108162

Filename

108162