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Thermal stress cracks have been observed in high voltage solid encapsulated transformer cells resulting from stress concentrations of the order of 10 at the interface between a copper plated shield and the resin. These cracks result in a degradation of CIV by a factor of 6. They are characterized by corona pulse spectra having very high amplitudes. Pulses of 50 to 500 pC have been observed at an overvoltage...
A method for the design of a high-voltage solid insulation system used in airborne or satellite high-voltage components and systems is presented, and illustrated with a successful system now used in these applications. The design is based on the elimination of corona in the solid, and principally involves making an insulation with a very high corona inception voltage and then controlling the electric...
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