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Surface discharge often occurs between a solid dielectric and high voltage conductor which is one of the major insulation failure modes. In this paper, surface discharge characteristics (phase resolved patterns, magnitude and repetition rate) of EPDM/BN nanocomposites are studied. Also investigated are the dielectric response, volume resistivity and mechanical properties. Surface modified boron nitride...
Dielectric diagnosis with polarization and depolarization currents (PDC) which employs the dielectric response of system in time domain is applied to investigate differences between PDC patterns produced by two types of transformer insulating fluids, mineral and bio-degradable oil. The mineral oil used is Shell Diala BX, and the biodegradable one is Envirotemp FR3. The latter is ester-based, and a...
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