Measurements of gas pressure in voids in epoxy castings for high voltage equipment

Publication: Research - peer-reviewConference article – Annual report year: 1988



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An investigation of samples of epoxy each containing one void, which were produced at different pressures, is reported. The samples were of the disk type with the void located in the center. The gas in the voids has a pressure somewhat related to the curing pressure, thereby directly influencing the partial-discharge inception voltage. Data show that gas pressure in voids in epoxy castings can be determined by use of an ultrasound test method. A relationship between the void gas pressure and the epoxy curing pressure is also found. This investigation is part of an effort to predict the inception voltage of partial discharges in high-voltage epoxy castings from the processing parameters
Original languageEnglish
JournalI E E E International Symposium on Electrical Insulation. Conference Record
Pages (from-to)372-375
StatePublished - 1988
Event1988 IEEE International Symposium on Electrical Insulation - Boston, MA, United States


Conference1988 IEEE International Symposium on Electrical Insulation
CountryUnited States
CityBoston, MA
Internet address

Bibliographical note

Copyright: 1988 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE

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