Method and system of current transformer output magnitude...

Details Method and system of current transformer output magnitude... Method and system of current transformer output magnitude...

2011-01-11

2011-01-11

Fureman, Jared J (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

C335S018000, C361S087000

Reexamination Certificate

active

07869169

ABSTRACT:
A method and system to detect currents in the saturation region of a current transformer for a circuit breaker is disclosed. An example method is sensing a fault condition with a current transformer in a circuit breaker. The characteristic curve of the current transformer in a saturation mode is determined based on peak current. A current is received on the transformer. A secondary current is output from the transformer. It is determined whether the secondary current is indicative of a fault current in the saturation mode of the transformer. The breaker is tripped if the secondary current is indicative of a fault current.

REFERENCES:
patent: 4297741 (1981-10-01), Howell
patent: 4301435 (1981-11-01), Castonguay et al.
patent: 4679019 (1987-07-01), Todaro et al.
patent: 4685024 (1987-08-01), Martellock et al.
patent: 4951052 (1990-08-01), Jacob et al.
patent: 4992723 (1991-02-01), Zylstra et al.
patent: 5014025 (1991-05-01), Papallo, Jr. et al.
patent: 5124875 (1992-06-01), Ishii et al.
patent: 5276416 (1994-01-01), Ozaki
patent: 5343179 (1994-08-01), Pipich et al.
patent: 5510773 (1996-04-01), Rodgers
patent: 5646586 (1997-07-01), Castonguay et al.
patent: 5666256 (1997-09-01), Zavis et al.
patent: 5670923 (1997-09-01), Gonzalez et al.
patent: 5701111 (1997-12-01), Castonguay et al.
patent: 5710399 (1998-01-01), Castonguay et al.
patent: 5835325 (1998-11-01), Tripodi et al.
patent: 5914663 (1999-06-01), Whitehead
patent: 6009615 (2000-01-01), McKean et al.
patent: 6031195 (2000-02-01), Meili et al.
patent: 6061217 (2000-05-01), Grunert et al.
patent: 6084756 (2000-07-01), Doring et al.
patent: 6154115 (2000-11-01), Flohr
patent: 6351232 (2002-02-01), Marie
patent: 6532139 (2003-03-01), Kim et al.
patent: 7307504 (2007-12-01), Carlino et al.
patent: 2002/0145416 (2002-10-01), Attarian et al.
patent: 0 303 994 (1989-02-01), None
patent: 0 477 936 (1992-04-01), None
patent: 0 580 473 (1994-01-01), None
patent: 397 635 (1933-08-01), None
patent: 1 293 134 (1972-10-01), None
patent: 2 360 135 (2001-09-01), None
patent: WO 2006/087342 (2006-08-01), None
Written Opinion corresponding to co-pending International Patent Application Serial No. PCT/US2007/015914, European Patent Office, dated Mar. 14, 2008, 8 pages.
International Search Report corresponding to co-pending International Patent Application Serial No. PCT/US2007/015914, European Patent Office, dated Mar. 14, 2008, 8 pages.

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