Sep 29, 2010 #1 rockspotter Nuclear Jul 7, 2008 2 Could anybody advise please? Which direction does current flow during an earth fault through a star point CT? The CT is around the star point earth cable.
Could anybody advise please? Which direction does current flow during an earth fault through a star point CT? The CT is around the star point earth cable.
Sep 29, 2010 #2 rbulsara Electrical Aug 19, 2003 4,242 You may want to look up CT polarity conventions. For example, as in http://www.kilowattclassroom.com/Archive/CurrentTransf.pdf If you look at the CT secondary only, the AC current is reversing the polarity every half cycle. Rafiq Bulsara http://www.srengineersct.com Upvote 0 Downvote
You may want to look up CT polarity conventions. For example, as in http://www.kilowattclassroom.com/Archive/CurrentTransf.pdf If you look at the CT secondary only, the AC current is reversing the polarity every half cycle. Rafiq Bulsara http://www.srengineersct.com
Sep 29, 2010 #3 waross Electrical Jan 7, 2006 28,066 The instantaneous polarity into the wye point will be opposite to the instantaneous direction of the faulted phase. Bill -------------------- "Why not the best?" Jimmy Carter Upvote 0 Downvote
The instantaneous polarity into the wye point will be opposite to the instantaneous direction of the faulted phase. Bill -------------------- "Why not the best?" Jimmy Carter
