Electricity: electrical systems and devices – Safety and protection of systems and devices – Ground fault protection
Patent
1982-06-10
1985-06-25
Moose, Jr., Harry E.
Electricity: electrical systems and devices
Safety and protection of systems and devices
Ground fault protection
361 48, H02H 316
Patent
active
045257647
ABSTRACT:
In accordance with the present invention, an electrical system is provided for disconnecting a power source from a load when a voltage potential in excess of a predetermined threshold is detected between a test point and a selected voltage reference point. Switch means is electrically connected intermediate the power source and the load for switchably connecting and disconnecting the power source with the load. Voltage-reference means provides predetermined reference voltage at the selected voltage reference point. Voltage-detection means is electrically connected with the test point and the selected voltage reference point for detecting when the voltage potential between the test point and the selected voltage reference point exceeds the predetermined threshold. Switch-actuator means responsive to the detection means is provided for actuating the switch means to disconnect the power source from the load when voltage potential in excess of the predetermined threshold is detected by the detection means.
REFERENCES:
patent: 2535064 (1950-12-01), Harrison
patent: 3771020 (1973-11-01), Smith
patent: 3895264 (1975-07-01), Kirilloff
patent: 4206490 (1980-06-01), Parrier et al.
patent: 4242712 (1980-12-01), Doll
Elektrotechnische Zeitschrift-ETZ65, (1944), pp. 109-113, 4/1944.
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