| Title |
Study on Shield Conditioning Process for Improving Withstand Voltage Performance of 29kV 20kA Vacuum Interrupter |
| Authors |
차영광(Young-Kwang Cha) ; 전기범(Ki-Beom Jeon) ; 이일회(IL-Hoi Lee) ; 구치욱(Chi-Wok Gu) ; 주흥진(Heung-Jin Ju) |
| DOI |
https://doi.org/10.5370/KIEE.2023.72.12.1692 |
| Keywords |
Dielectric performance; Vacuum Interrupter; AC conditioning; Electrode; Shield; Shield conditioning |
| Abstract |
In order to improve the dielectric performance of vacuum interrupter, various conditioning method have been used. Among them, AC conditioning is most commonly used because the method is simple and high effects can be obtained in a short time. AC conditioning has a very high effect on smoothing the electrode surface by opening the electrode and applying a high voltage to the electrode to remove microscopic protrusions impurities on the electrode surface. However, since discharge generated inside the vacuum interrupter occurs not only between electrodes but also between the electrode and the main shield, conditioning of the shield is also required. In general, shield conditioning using AC voltage applies a method of applying a high voltage to the shield of vacuum interrupter directly, but since the distance between the electrode and the shield is larger than that between the electrodes, high voltage application is required and de-conditioning effect may occur.
In this study, to solve this problem, the conditioning of the shield was carried out at the part stage before the production of the product and the effect was proved. It was confirmed that the withstand voltage performance was stabilized faster when the shield conditioning was performed at the part stage, regardless of whether the shield conditioning was performed at the product stage. |