Original scientific paper

The measurement and normalisation of dielectric dissipation factor for diagnostics of transformer insulation

Anatoly Shkolnik ; Israel Electric Corporation

Abstract

This article describes additional features of the method of Dielectric Dissipation Factor (DDF)/Tangent Delta (tgδ) measurement for a more accurate diagnosis of the condition of the transformer solid insulation. The proposed method is based on determining the DDF weight of solid insulation and oil in the measured value of DDF for the proper insulation zone of the transformer. The article proposes normalisation of DDF values according to the rated voltage of the transformer, and the analysis of the impact of design combining insulation and its condition on recalculation of DDF measurement results at a given temperature to the base temperature.

Keywords

transformer; dielectric dissipation factor (DDF); transformer insulation

Hrčak ID:

181969

URI

https://hrcak.srce.hr/181969

Publication date:

8.10.2015.

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