Redundant instantaneous trip detection

Details Redundant instantaneous trip detection Redundant instantaneous trip detection

2007-07-02

2009-06-23

Masih, Karen (Department: 2837)

Electricity: motive power systems

Motor load, armature current or force control during...

C318S432000, C318S433000

Reexamination Certificate

active

07550939

ABSTRACT:
A motor circuit protector that trips in accordance with an instantaneous trip curve that is split into three protection regions, a self-protection region, an in-rush avoidance region, and a locked-rotor avoidance region. Software modules for detecting whether primary current exceeds each region are run in parallel or simultaneously, providing redundant instantaneous trip detection, and these redundant protection regions remain active throughout the startup and steady-state modes of operation of the motor circuit protector. This redundancy provides improved time current trip performance for a wide variety of short circuit conditions and improved system safety properties are realized. The current threshold for the self-protection region can be adjusted toward the in-rush avoidance region once steady-state operation is achieved. In startup mode, only the self-protection region may be detected, but can remain active during steady-state mode.

REFERENCES:
patent: 4301435 (1981-11-01), Castonguay et al.
patent: 4679019 (1987-07-01), Todaro 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: 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: 6922318 (2005-07-01), Matsumoto 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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