The condition assessment of power transformers insulation using dielectric spectroscopy in frequency domain is a very useful method. Unfortunately, this method has a main deficiency due to the long measurement time, especially at low electric field frequencies and also to the expensive cost of the equipments. Another easier method which also permits to… (More)

Busoi, “Lifetime estimation of composite insulations by absorption/resorption currents method

P. V. Noţingher, S.A.L.M. Dumitran

Rev. Roum. Sci.Tech. – Serie Electrot. et Energ.,

2010

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4 Excerpts

Lifetime estimation of composite insulations by absorption / resorption currents method ”

L. M. Dumitran, S. A. Busoi

Rev . Roum . Sci . Tech . – Serie Electrot . et…

2010

Notingher, “Assessment of oil impregnated paper condition using the dielectric response function

L. V. Badicu, B. Gorgan, P.V.L.M. Dumitran

Proceedings of Electrotechnique Nationale…

2010

1 Excerpt

calculated measured tg δ Frequency (Hz) Fig. 9. Loss factor variation as a function of frequency for oil impregnated paper aged at T = 135 oC for τ = 150 h