Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference (한국전기전자재료학회:학술대회논문집)
- 2004.07a
- /
- Pages.499-502
- /
- 2004
Assessment of Insulation Condition in Large Transformers
대형변압기 절연상태 평가
-
Kim, Hee-Dong
(Korea Electric Power Research Institute)
;
- Kong, Tae-Sik (Korea Electric Power Research Institute) ;
- Lee, Young-Jun (Korea Electric Power Research Institute) ;
-
Park, Jae-Jun
(Joong Bu University)
- Published : 2004.07.05
Abstract
In order to detect of insulation problems an early, transformer has to be performed the several tests. The ac current and tan6 of transformer winding insulation were investigated by Schering bridge. Partial discharge(PD) tests are used to evaluate the insulation condition of transformer. The moisture content measurement was conducted using RVM(recovery voltage meter). The RVM test can show that the problem is affecting the paper insulation of transformer. The value of moisture content was 2.3% in main transformer. The insulations of four transformers were judged to be in good condition.