Change in PD pattern with aging

  title={Change in PD pattern with aging},
  author={C.-S. Kim and Tomoaki Kondo and Teruyoshi Mizutani},
  journal={IEEE Transactions on Dielectrics and Electrical Insulation},
The changes in the PD /spl Phi/-q-n pattern and the PD current shape due to the degradation of insulating materials have been investigated with a fast digital oscilloscope and a PD measurement system. In order to verify the effect of gas change, the volume of gas in a void was observed with the /spl Phi/-q-n pattern. It showed that the change in the maximum PD magnitude is related to the change in gas volume according to ageing time. The PD /spl Phi/-q-n pattern could be classified into the… CONTINUE READING
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