Dissipation/power factor measurement (Tan Delta) on power transformers

The condition of the insulation is essential for secure and reliable operation of your transformer. Measuring capacitance and dissipation/power factor helps you to determine insulation condition in bushings or between windings.

Changes in capacitance can, for example, indicate mechanical displacements of windings or partial breakdown in bushings. Aging and degradation of the insulation, coupled with the ingress of water, increase the amount of energy that is converted to heat in the insulation. The rate of these losses is measured as dissipation factor.

With our testing systems, you can even determine the capacitance and dissipation/power factor at variable frequency. Therefore, aging phenomena can then be detected earlier, and corresponding action such as repair, oil treatment or drying can be initiated.

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