Medium-voltage or high-voltage electrical device having low-thickness hybrid insulation
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United States of America Patent
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May 25, 2021
Grant Date -
May 23, 2019
app pub date -
Dec 28, 2016
filing date -
Dec 28, 2015
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Abstract
A medium-voltage or high-voltage electrical device comprising a sealed enclosure in which are located electrical components covered with a solid dielectric layer and a gaseous medium ensuring electrical insulation and/or extinguishing electrical arcs, the gaseous medium comprising heptafluoroisobutyronitrile and a dilution gas, the thickness of the solid dielectric layer being less than 1 mm and being produced from a material comprising a polyepoxide or polyurethane resin optionally containing a filler or aluminum oxide.
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