Electricity: electrical systems and devices – Safety and protection of systems and devices – With specific current responsive fault sensor
Reexamination Certificate
2005-03-22
2005-03-22
Sircus, Brian (Department: 2836)
Electricity: electrical systems and devices
Safety and protection of systems and devices
With specific current responsive fault sensor
Reexamination Certificate
active
06870722
ABSTRACT:
The circuit of the invention provides protection for both a spur circuit and the network while allowing other spurs on the network to continue operation and is applicable to any type of fieldbus network including both FF and ASi type networks. A control circuit monitors a current limiter coupled to each spur circuit. If the spur circuit goes into an overcurrent condition for a preset period of time, the control circuit turns it off. After a second period of time has elapsed, the control circuit turns the current limiter back on permitting current to flow in the spur once again while continuing to monitor the current limiter.
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Graube Maris
Lommen Dana
Strauser Michael
Chernoff Vilhauer McClung & Stenzel LLP
Demakis James A
Relcom, Inc.
Sircus Brian
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