Inventor
UGAWA TETSUO
JP2 patents
Patents
2 patentsUS5764462AJun 9, 1998
Field ground fault detector and field ground fault relay for detecting ground corresponding to DC component extracted ground fault current
TOSHIBA KK28 citations89
US5675465AOct 7, 1997
Field ground fault detector and field ground fault relay for detecting ground fault corresponding to DC component extracted from ground fault current
TOSHIBA KK22 citations89