Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference (한국전기전자재료학회:학술대회논문집)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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The Aging Measurement of Water Tree Using AgNO$_3$Solution

AgNO$_3$을 이용한 수트리의 실시간 열화계측

  • Kim, Duck-Keun (Dept. of Electrical Eng., Chonnam National University) ;
  • Ooh, Soo-Hong (Dept. of Electrical Eng., Chonnam National University) ;
  • Lee, Jin (The Major in Electrical Eng., Faculty of Information Engineering, Mokpo National University) ;
  • Lee, Eun-Hak (Dept. of Electrical Eng., Halla Institute of Technology) ;
  • Kim, Tae-Sung (Dept. of Electrical Eng., Chonnam National University)
  • 김덕근 (전남대학교 전기공학과) ;
  • 오수홍 (전남대학교 전기공학과) ;
  • 이진 (목포대학교 정보공학부) ;
  • 이은학 (한라공과대학 전기공학과) ;
  • 김태성 (전남대학교 전기공학과)
  • Published : 1997.11.01
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Abstract

The phenomenon of water tree degradation of underground distribution power cables is taking place in polymeric insulation materials under the existence of water and application of electric stress, but water tree is not easy to observe, o water tree features in power cables are shown after cutting and dying with methyleneblue. In previous method, it is impossible to acquire continuous treeing data, and when the insulation material has been cut, the micro crack(water tree) has been damaged. In this paper, to overcome these deflects, the etching method is made use of making needle electrode about 170[${\mu}{\textrm}{m}$] diameter, and AgNO$_3$(silver nitrate) solution is used as liquid electrode to accelerate the growth of water trees. As a result of this study, water tree is observed in real-time with microscope. Electrical tree owing to water treeing is initiated at low electric field and grown with discontinuous. Namely, water tree is shown up a different characteristics of tree growth.

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