Electricity: electrical systems and devices – Safety and protection of systems and devices – Feeder protection in distribution networks
Reexamination Certificate
2006-12-29
2009-06-02
Jackson, Stephen W (Department: 2836)
Electricity: electrical systems and devices
Safety and protection of systems and devices
Feeder protection in distribution networks
C361S063000, C361S064000, C361S065000, C361S066000, C361S067000, C361S068000, C361S080000, C361S081000, C361S082000, C361S084000, C324S522000
Reexamination Certificate
active
07542256
ABSTRACT:
A method of operating a relay device, the method comprising the steps of: providing main circuit-breakers and a bus-tie-breaker connecting the main-circuit-breakers; defining a partial-differential-zone comprising a main circuit breaker and the bus-tie breaker; assigning a first value to the direction of the fault current flowing into the partial differential zone;—assigning a second value to the direction of the fault currents flowing out of the partial-differential-zone, wherein the first value is not equal to the second value;—comparing the values assigned to the fault currents; determining if the fault currents are flowing into the partial differential zone; and determining if at least two of the fault-currents is flowing in a different direction with respect to the partial-differential-zone wherein one of the fault currents is flowing into the partial-differential-zone and one of the fault currents is flowing out of the partial differential zone.
REFERENCES:
patent: 5325031 (1994-06-01), Tilden
patent: 5572138 (1996-11-01), Nimmersjo
patent: 6297939 (2001-10-01), Bilac et al.
patent: 6714395 (2004-03-01), Meisinger et al.
patent: 6914762 (2005-07-01), Bo
patent: 6937453 (2005-08-01), Kase et al.
patent: 6985784 (2006-01-01), Vandevanter et al.
patent: 6985800 (2006-01-01), Rehtanz et al.
patent: 7012421 (2006-03-01), Lavoie et al.
patent: 7233470 (2007-06-01), Kase et al.
patent: 2004/0133370 (2004-07-01), Lavoie et al.
patent: 2008/0158752 (2008-07-01), Hill et al.
“The Single-Processor Concept for Protection and Control of Circuit Breakers in Low-Voltage Switchgear”, M Valdes, T Papallo & I Purkayastha, IEEE Transactions Jul./Aug.
“IEEE Guide for Performing Arc-Flash Hazard Calculations”, IEEE Standard 1584-2002, Published by The institute of Electrical and Electronic Engineers, Inc. NY, NY.
“IEEE Guide for Performing Arc-Flash Hazard Calculations-Amendment 1” IEEE Standard 1584a-2204, Published by the Institute of Electrical and Electronic Engineers, Inc. NY, NY.
U.S. Appl. No. 11/618,192, filed Dec. 29, 2006, William Premerlani, et al.
Lavoie Gregory P.
Narel Radoslaw
Papallo, Jr. Thomas Frederick
Premerlani William
Valdes Marcelo
General Electric Company
Jackson Stephen W
Willoughby Terrence R
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