Stability of novel hydrophobic epoxies exposed to UV-radiation, high humidity and temperature

Dirix, Yvo; Meier, Patrick; Kaltenborn, Uwe; Tilliette, V.

doi:10.1109/ceidp.2001.963612

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“…Aging of insulators may be accelerated by large changes in temperature and humidity [4], voltage [5] or corona effect of water drops [6][7][8]. The materials under investigation here are used in indoor devices and are not submitted to outdoor stresses like rain, ice or dust.…”

Section: Introductionmentioning

confidence: 99%

Impact of Water Content on the Electrical Behavior of Epoxy Insulators

Mboungou

Mavon

Friedt

et al. 2008

IEEE Trans. Dielect. Electr. Insul.

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Polymers are widely used in indoor insulation. We analyze three epoxy samples with varying matrix and fillerproperties to determine the influence of water on their insulating properties. We observed a strong dependency of the leakage current and the sample temperature, under electrical stress, on the amount of absorbed water. Trihydrated alumina filler reduced the leakage current and temperature rise under electrical stress.

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