Determination of aging-model constants under high frequency and high electric fields

Polypropylene film is tested for life under HV, frequencies up to 30 kHz, and aging and breakdown studies are conducted. The life data obtained is applied to three different aging models relating electric stress to time to failure: the inverse power, the exponential and the thermodynamic model. The dependency of the constants of these models on the frequency of the applied voltage is determined. The results show that the aging model constants are dependent on applied voltage and frequency.<
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