Circuit breakers with ground fault and overcurrent trip

Details Circuit breakers with ground fault and overcurrent trip Circuit breakers with ground fault and overcurrent trip

2008-03-13

2010-11-16

Fureman, Jared J (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

C361S043000, C361S044000, C361S045000, C361S046000, C361S047000, C361S048000, C361S049000, C361S050000

Reexamination Certificate

active

07835120

ABSTRACT:
A circuit breaker apparatus may be used to interrupt overcurrent and ground fault in a circuit. The circuit breaker apparatus may include an overcurrent coil for tripping the circuit breaker apparatus, a voltage coil also for tripping the circuit breaker apparatus located proximate to the overcurrent coil, and ground fault electronics connected to the voltage coil and structured to detect a ground fault in the circuit when the ground fault exceeds a threshold level. The ground fault electronics can be structured to send a trip signal to the voltage coil when a ground fault is detected, and the voltage coil can be structured to trip the circuit breaker apparatus when it receives the trip signal from the ground fault electronics.

REFERENCES:
patent: 3898528 (1975-08-01), Runtsch et al.
patent: 4037185 (1977-07-01), Klein
patent: 5179491 (1993-01-01), Runyan
patent: 5331301 (1994-07-01), Glennon et al.
patent: 5510658 (1996-04-01), Nakayama
patent: 6757626 (2004-06-01), Dougherty et al.
patent: 7424925 (2008-09-01), Buglione et al.
patent: 2007/0091520 (2007-04-01), Angelides et al.
patent: 0 074 576 (1983-03-01), None
International Search Report and Written Opinion, PCT/US2008/056867, Date mailed Sep. 23, 2008.

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