A Consideration on AC Tree Growth at the Heat-Adhesive Interfaces of Diffrent Polymers

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  • 異種高分子融着界面における交流トリー進展に関する一考察
  • イシュ コウブンシ ユウチャク カイメン ニ オケル コウリュウ トリー シンテン ニ カンスル イチ コウサツ

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Abstract

Composite insulation systems consist of different insulators and their systems are widely used in high voltage equipment and in power cables. These interfaces are the weak part of the composite and play a decisive role in the electrical treeing and dielectric breakdown processes of the composite. Therefore, it is important to study the effects of their interfaces on the electrical treeing of polymer/polymer composite insulators.<br>In this paper, we investigate the ac tree growth in the specimens having heat-adhesive interfaces between ethylene vinyl acetate copolymer (EVA) sheets and the other different polymer films. The polymer/polymer interfaces in our study are arranged as being parallel to the line of electric force. It is found that the characteristics of ac tree propagation in the vicinity of the polymer/polymer interfaces are considerably different at the combinations of different polymers.

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