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Time domain measurements of dielectric response in oil-paper insulation systems

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2 Author(s)
Der Houhanessian, V. ; High Voltage Lab., Swiss Federal Inst. of Technol., Zurich, Switzerland ; Zaengl, Walter S.

The results of dielectric response measurements in the time and frequency domain on homogeneous impregnated pressboard and on series arrangements of pressboard sheets and oil ducts are presented. A simple equivalent circuit is proposed to model oil-paper insulation systems for single impregnated pressboard sheets as well as for multi-layer arrangements. This equivalent circuit which is derived from relaxation current measurements is then used to calculate recovery voltages as well as the frequency-dependent permittivity. Finally it is shown that the same procedure can be applied to quantify the dielectric response properties on high voltage power transformers

Published in:

Electrical Insulation, 1996., Conference Record of the 1996 IEEE International Symposium on  (Volume:1 )

Date of Conference:

16-19 Jun 1996