Sensitive low field Kerr electro-optic measurements in transformer oil

6 January 2003

conference paper
Published by Institute of Electrical and Electronics Engineers (IEEE)

p. 334-339
https://doi.org/10.1109/ceidp.1988.26354

Abstract

A frequency-selective amplifier was used to make sensitive Kerr electro-optic field mapping measurements with a small signal AC voltage superimposed on a DC level. With several different electrode materials, including brass, stainless steel, and aluminium, the authors have observed very significant levels of field distortion due to positive space charge on the order of 400 mu C/m/sup 3/. It was possible to measure field strengths as low as 100 V/cm with typical average field strengths tested over the range of 500 V/cm to 29 kV/cm. The transient evolution of these fields was also measured, showing the transition from a uniform to a highly nonuniform field on a time scale on the order of 60 s.<>

Keywords

This publication has 2 references indexed in Scilit:

Couette charger for measurement of equilibrium and energization flow electrification parameters: application to transformer insulation
IEEE Transactions on Electrical Insulation, 1988
Electric Field Measurement in Liquid Dielectrics Using a Combination of AC Voltage Modulation and a Small Retardation Angle
IEEE Transactions on Electrical Insulation, 1987