A Study on the Integrity Evaluation of the Windings in Cast Resin Transformers Using Vertical Thermal Distribution Analysis

수직온도분포 분석을 이용한 몰드변압기 권선의 건전성 평가 연구

This paper presents the integrity evaluation method of the windings in cast resin transformers using vertical thermal distribution analysis. The method is to compare the temperature distribution in a sound condition specimen with that in the failure condition specimen layer-shorted by accelerated testing. The temperature distribution was acquisited by a infrared thermography system, and the Arrhenius equation was adopted to the accelerated testing. The proposed method may be available to detect the failures in cast resin transformers.