So What is Capacitor Corona?
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This article describes a failure analysis precipitated by system outages caused by failures in a snubber circuit. The subsequent failure investigations include electrical stress analysis and investigation of capacitor component failures. The effects of various electrical stress and environmental factors and their impact on various capacitor failure modes is discussed. Several clues lead to capacitor corona as a possible culprit, with physical part inspections leading to the final source of the failure.
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