Electricity: electrical systems and devices – Safety and protection of systems and devices – Ground fault protection
Reexamination Certificate
2007-07-02
2010-12-28
Fureman, Jared J (Department: 2836)
Electricity: electrical systems and devices
Safety and protection of systems and devices
Ground fault protection
C355S044000
Reexamination Certificate
active
07859802
ABSTRACT:
An automatic temperature compensation method that automatically adjusts trip point thresholds of a motor circuit protector in response to changes in temperature. The relationship between two curves is exploited to match temperature sensor readings from a temperature sensor circuit with burden resistor percentage values derived from a burden resistor circuit. A temperature inflection point is determined from the intersection of (1) the temperature sensor curve plotting the voltage output of the temperature sensor versus temperature and (2) the burden resistance curve plotting burden resistance versus temperature. A temperature value along the temperature sensor curve is transformed into the corresponding burden resistance on the burden resistance curve. The burden resistance is expressed as a percentage variance from a burden resistance at an ambient temperature. An adjusted trip point threshold is calculated from the computed burden resistor percentage, and the adjusted trip point threshold is stored in a memory.
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: 5331501 (1994-07-01), Shimp
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: 5818301 (1998-10-01), Higashiyama 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: 6067797 (2000-05-01), Silverbrook
patent: 6084756 (2000-07-01), Doring et al.
patent: 6154115 (2000-11-01), Flohr
patent: 6167329 (2000-12-01), Engel et al.
patent: 6351232 (2002-02-01), Marie
patent: 6466424 (2002-10-01), Larranaga et al.
patent: 7307504 (2007-12-01), Carlino et al.
patent: 2002/0145416 (2002-10-01), Attarian et al.
patent: 2005/0103613 (2005-05-01), Miller
patent: 2005/0219032 (2005-10-01), Williams 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.
Davison William
Malo Kevin John
Meehleder Steve M.
Moffitt Ryan James
Reid Paul Andrew
Brooks Angela
Fureman Jared J
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