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Class Information
Number: 361/50
Name: Electricity: electrical systems and devices > Safety and protection of systems and devices > Ground fault protection > In a single phase system > With more than two wires
Description: Subject matter wherein the load in a single phase system with more than two wires is protected from an unintentional grounding, usually be removing the power from the load when a ground fault is detected by a sensing means.

Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8605394 Apparatus, method, and system for monitoring leakage current and detecting fault conditions in electrical systems Dec. 10, 2013
8575941 Apparatus and method for identifying a faulted phase in a shunt capacitor bank Nov. 5, 2013
8559143 Vehicle control system Oct. 15, 2013
8537516 Apparatus, method, and system for monitoring of equipment and earth ground systems Sep. 17, 2013
8537509 Ground fault detecting and controlling method for parallel-structured high voltage system Sep. 17, 2013
8405939 Protective device for an electrical supply facility Mar. 26, 2013
8331067 Method and apparatus for moving material Dec. 11, 2012
8311785 Methods and apparatus to minimize saturation in a ground fault detection device Nov. 13, 2012
8259423 Automotive vehicle charge port with fault interrupt circuit Sep. 4, 2012
8139328 Fault circuit interrupting device with symmetrical inputs Mar. 20, 2012
8018235 Methods and apparatus to facilitate ground fault detection with a single coil and an oscillator Sep. 13, 2011
7969154 Methods for installing an antenna reception system Jun. 28, 2011
7948722 Differential protection device May. 24, 2011
7944213 Ground fault detection device May. 17, 2011
7852090 Apparatus, system and methods for ground current detection Dec. 14, 2010
7835120 Circuit breakers with ground fault and overcurrent trip Nov. 16, 2010
7764473 Method of detecting a ground fault and electrical switching apparatus employing the same Jul. 27, 2010
7751161 Leakage current detection and interruption circuit Jul. 6, 2010
7636224 Method and safety device for ground fault circuit Dec. 22, 2009
7633727 Arc fault circuit interrupter and series arc fault detection method using plural high frequency bands Dec. 15, 2009
7633728 Arc fault circuit interrupter and method of parallel arc fault detection Dec. 15, 2009
7626788 Control circuit of ground fault circuit interrupter (GFCI) Dec. 1, 2009
7623329 Leakage current detection and interruption circuit with improved shield Nov. 24, 2009
7558033 Arc fault circuit interrupter and method of parallel and series arc fault detection Jul. 7, 2009
7538647 Ground fault circuit interrupter device May. 26, 2009
7443309 Self testing ground fault circuit interrupter (GFCI) Oct. 28, 2008
7440246 Circuit interrupting apparatus with remote test and reset activation Oct. 21, 2008
7423854 Interruption circuit with improved shield Sep. 9, 2008
7319574 Arc fault detection apparatus, method and system for an underground electrical conductor Jan. 15, 2008
7023196 High level arc fault detector Apr. 4, 2006
6765390 Diagnostic wiring verification tester Jul. 20, 2004
6556395 Ground fault circuit interrupter for circuits operating with non-sinusoidal waveforms Apr. 29, 2003
6437700 Ground fault circuit interrupter Aug. 20, 2002
6268988 Ground fault detector for gas discharge tubing Jul. 31, 2001
6031700 Ground detector for a static grounding system Feb. 29, 2000
6016244 Shock hazard protection system Jan. 18, 2000
5969921 Ground fault electrical switching apparatus for coordinating tripping with a downstream ground fault switch Oct. 19, 1999
5886606 Circuit breaker Mar. 23, 1999
5869942 Noise suppression in relay-switched motors Feb. 9, 1999
5801912 Shock hazard protection system Sep. 1, 1998
5726900 Ground detection circuit for a three wire power supply Mar. 10, 1998
5583730 Shock hazard protection system Dec. 10, 1996
5546263 Shock hazard protection system Aug. 13, 1996
5541800 Reverse wiring indicator for GFCI receptacles Jul. 30, 1996
5490030 Electromagnetic and radio frequency interference suppression for ground fault circuit interrupters Feb. 6, 1996
5475557 Method and apparatus for protecting electrical systems Dec. 12, 1995
5424893 Gas discharge device power supply with ground fault protection Jun. 13, 1995
5424895 Electrical wiring system with overtemperature protection Jun. 13, 1995
5418678 Manually set ground fault circuit interrupter May. 23, 1995
5406436 Shock hazard protection system Apr. 11, 1995

1 2 3

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