Electricity: electrical systems and devices – Safety and protection of systems and devices – Ground fault protection
Reexamination Certificate
2009-05-04
2011-12-27
Fureman, Jared (Department: 2836)
Electricity: electrical systems and devices
Safety and protection of systems and devices
Ground fault protection
C324S528000, C324S529000, C324S530000
Reexamination Certificate
active
08085517
ABSTRACT:
The present invention is implemented by deploying an enhanced ground fault detection and location apparatus and by using the apparatus in conjunction with specific circuit analysis methods, using the information generated by the ground fault detection and location apparatus. The ground fault detection and location apparatus comprises the functionality of a voltmeter, an ammeter, a phase angle meter, a frequency generator, and a variable power supply, thereby providing for a variety of signals and analyses to be performed on a unintentionally grounded circuit in an ungrounded AC or DC power distribution system. The ground fault detection and location apparatus is capable of operating in six different modes, with each mode providing a different capability or opportunity for detecting, analyzing, and locating one or more unintentionally grounded circuits in an normally ungrounded AC or DC power distribution system. Additionally, the present invention is configured to manipulate a ground fault current at a first target frequency and a second target frequency, thereby enabling more rapid and efficient location of ground faults.
REFERENCES:
patent: 2651021 (1953-09-01), Hays, Jr.
patent: 4884034 (1989-11-01), Guzman
patent: 5714885 (1998-02-01), Lulham
patent: 6154036 (2000-11-01), Baldwin
Green Wayne L.
Kincaid Russsell L.
Weems, II Warren A.
Bauer Scott
Fureman Jared
Wright Mark F.
Wright Law Group PLLC
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