Electricity: electrical systems and devices – Safety and protection of systems and devices – Ground fault protection
Patent
1997-07-07
1998-11-10
Gaffin, Jeffrey A.
Electricity: electrical systems and devices
Safety and protection of systems and devices
Ground fault protection
H02H 316
Patent
active
058353224
ABSTRACT:
A resettable ground fault circuit interrupter most advantageously suited for use with 400-Hz aircraft electrical systems and designed to interrupt the AC power between an aircraft electrical system and one or more electrical appliances being operated therein when a ground fault occurs. The circuit relies upon an imbalance sensor which is implemented in the preferred embodiment disclosed herein as a multi-turn coil of a transformer through which input wires connected to an AC input terminal are threaded so that an imbalance resulting from a ground fault can be detected by the coil. The signal generated by the coil as a result of such an imbalance is then amplified and applied to a thyristor, the conducting or non-conducting state of which determines whether or not the circuit is in a configuration for interrupting the AC signal or not interrupting the AC signal. Light emitting diodes are utilized to indicate the interruption status of the circuit. A reset switch is provided to reset the thyristor after an imbalance ceases because of removal of a ground fault that had previously occurred.
REFERENCES:
patent: 3558980 (1971-01-01), Florance et al.
patent: 3668470 (1972-06-01), Ambler et al.
patent: 3978337 (1976-08-01), Tatsumi
patent: 3996496 (1976-12-01), Volk, Jr. et al.
patent: 4029996 (1977-06-01), Miffitt
patent: 4077056 (1978-02-01), Galiana
patent: 4205358 (1980-05-01), Washington
patent: 4216515 (1980-08-01), Van Zeeland
patent: 4353103 (1982-10-01), Whitlow
patent: 4447844 (1984-05-01), Schossow et al.
patent: 4722021 (1988-01-01), Hornung et al.
patent: 4876622 (1989-10-01), Dougherty
patent: 4888660 (1989-12-01), Bartelink
patent: 4942612 (1990-07-01), Wu
patent: 5233496 (1993-08-01), Morishige
patent: 5241443 (1993-08-01), Efantis
patent: 5361183 (1994-11-01), Wiese
patent: 5363269 (1994-11-01), McDonald
Freudenberg Ray E.
Randolph David C.
Rix John F.
Smith Donald E.
Gaffin Jeffrey A.
Sherry Michael J.
Smith Donald E.
Tachner Leonard
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