Characterization of underground cable failures
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Research has been performed on underground distribution cables to begin characterizing incipient failure behavior for the development of an underground incipient failure detection system. Field experiments were performed on damaged samples energized at 7.2 kV. Data was collected with an analog recorder and stored in three different data formats: raw signal, notch filtered signal, and notch filtered and high pass filtered signal. Results have shown a definite difference in the time and frequency domains of the signals from both the control sample and the damaged samples filtered with the notch filter and filtered with the notch and high pass filters.
PROCEEDINGS OF THE AMERICAN POWER CONFERENCE, VOL 59 - PTS I AND II
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Cardoso, J., & Butler, K. L.
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