Overcurrent pick up for upstream fault

Status
Not open for further replies.

JabBauer

Member
Location
USA
Occupation
Protection
Interesting issue has appeared in at least two separate locations utilizing similar equipment. Upstream fault initiates equipment overcurrent lockout set at 480A on 12kV primary side of delta-wye connected transformer. I am scratching my head as to the source of the current. The controller does not record current magnitude, so the event record record shows phase voltage and logic changes, 50P, lockout.

Secondary load is unknown, machines may be possible, but generators are not allowed to parallel.
 
Status
Not open for further replies.
Top