<p>The present invention relates to a ground fault detection arrangement for a synchronous three-phase electrical machine, and an electrical system comprising a ground fault detection arrangement and a synchronous three-phase electrical machine. The ground fault detection arrangement injects an off-nominal frequency voltage between a neutral point of the synchronous three-phase electrical machine and ground and measure resultant currents to detect a ground fault.</p>
申请公布号
EP1890369(A1)
申请公布日期
2008.02.20
申请号
EP20060445061
申请日期
2006.08.18
申请人
ABB RESEARCH LTD
发明人
OLGUIN, GABRIEL;JOHANSSON, STEFAN G.;FULCZYK, MAREK;BENGTSSON, TORD;LINDAHL, STURE