Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference (한국전기전자재료학회:학술대회논문집)
- 2004.07a
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- Pages.481-484
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- 2004
Diagnostic of Cast Resin Using Active Infrared Thermal Testing Method
능동열시험법을 이용한 몰드변압기 진단
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Lim, Young-Bae
(KESCO Electrical Safety Research Institution) ;
- Jeong, Seung-Cheon (KESCO Electrical Safety Research Institution)
- Published : 2004.07.05
Abstract
A form of measured temperature distribution to estimate condition of a electrical apparatus is a absolute reference for condition of the apparatus, time rate of transition, and difference between reference and currently temperature. Because passive thermography which has not injection of external thermal stimulation shows difference of temperature being on surface of a structure and temperature difference between the structure and back ground, the result could apply only to estimation or monitor for condition of terminal relaxation and overload related with temperature rising. However, a thermal flow in active thermography is differently generated by structure and condition of surface and subsurface. This paper presents the nondestructive testing using the properties and includes the results by heat injection and cooling to the apparatus. The buried discontinuity of subsurface could be detected by these techniques.