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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Detection of Ultrasonic Signals Associated with Tree Growth in Epoxy resin

애폭시수지의 트리성장에 따른 초음파 신호검출

  • 이상우 (영남대학교 전기전자공학부) ;
  • 송현직 (영남대학교 전기전자공학부) ;
  • 이광식 (영남대학교 전기전자공학부) ;
  • 이동인 (영남대학교 전기전자공학부) ;
  • 김인식 (경일대학교 전기공학부)
  • Published : 1998.06.01
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Abstract

Ultrasonic signal characteristics related with the growth of electrical trees in epoxy resin are examined under 67[Hz] ac voltage application along with a CCD camera and PD current method. The ultrasonic sensor with a resonant frequency of 200[Hz] supported by a mechanical spring is attached directly to the lower-side of plane electrode. The magnitude of Partial discharge and count rate of ultrasonic signals have been measured according to the tree growth from a needle tip in an epoxy sample.

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