전력기기 예방진단 기술을 위한 저전압 충격시험

Low Voltage Impulse Test for Power Electric Instrunment Precaution Diagonsis Techniques

In this paper, response characteristics by applying impulse into transformer windings in order to precaution diagonosis of power electric instrument are studied. A sample oilless transformer, an aging transformer and a good transformer are slected for models. The experimented results show that for testing the windings distortion and impedanced change of transformer the LVI method are suitable. Also, variation characteristic of output waveforms at time and frequency domain in order to efficient analysis is discussed. The results response that waveforms at frequency domain is very higher resolution at time domain.