A multi-mobility model for polymer insulation: Role of high-mobility space charge on breakdown with high dv/dt voltages
Xingyu Shang,
Lei Pang,
Qinhao Bu
et al.
Abstract:The failure of polymeric solid insulation under transient voltages is closely associated with space charge. In this study, DC and AC field dependent conduction characteristics of epoxy resin were investigated using the space charge limited current and high voltage broadband dielectric spectrum methods. The breakdown voltages (BDVs) were examined over a wide range of DC voltage ramp rates. The results reveal a threshold effect of AC conduction loss below 600 Hz with respect to the electric field. By analyzing c… Show more
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