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A Study on the Analysis of Damage Cause for MOF Installed in 22.9 kV Power Receiving System  

Kim Hyang-Kon (전기안전연구원(한국전기안전공사 부설))
Shong Kil-Mok (전기안전연구원(한국전기안전공사 부설))
Kim Dong-Ook (전기안전연구원(한국전기안전공사 부설))
Choi Chung-Seog (전기안전연구원(한국전기안전공사 부설))
Publication Information
Fire Science and Engineering / v.19, no.1, 2005 , pp. 93-98 More about this Journal
Abstract
The purpose of this paper is to judge the damage cause of instrument transformer(MOF; Metering Out Fit) installed in 22.9kV power receiving system. In the three-dimensional analysis of the restored MOF, the damage pattern progressed from inside to outside, there was no damaged part in the upside. The resistance of the carbonized middle part is roughly $100\kappa\Omega$ and the exothermic temperature at inside is presumed as about $300\~800^{\circ}C$ in the result of metallurgical structure analysis. The structure and the composition rate on metal surface by SEM is similar. In the result of FT-IR analysis, we can observe the absorbtion peak at $1500cm^{-1}\;and\;1730 cm^{-1}$ is small. The high exothermic peak showed at the center part of the coil in the result of DTA.
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