Analysis of Correlation Endwinding Breakdown and Insulation Test for Stator winding of Hydro-Generator

수력발전기 고정자권선의 단말부 절연파괴와 절연특성시험과의 관련성 분석

The test were performed to analyze the cause of endwinding breakdown of hydro-generator which had been in service after being constructed 1971. we conducted insulation diagnostic tests and checked visual inspection and operating condition of protective relays. On the basis of these test results, this paper tried to present the importance of service environment for the generator stator winding.