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7633728 Arc fault circuit interrupter and method of parallel arc fault detection  
An arc fault circuit interrupter includes separable contacts, an operating mechanism, a current sensor sensing current flowing through the contacts and outputting a sensed current, and a processor...
7633727 Arc fault circuit interrupter and series arc fault detection method using plural high frequency bands  
A circuit interrupter includes band pass filters cooperating with a current sensor to output bands having different, non-overlapping ranges of frequencies, peak detectors cooperating with the...
7633736 Circuit interrupter including nonvolatile memory storing cause-of-trip information  
A circuit breaker includes separable contacts, an operating mechanism structured to open and close the separable contacts, and a trip mechanism. The trip mechanism includes a sensor structured to...
7623329 Leakage current detection and interruption circuit with improved shield  
A circuit is disclosed for disconnecting a power source upon the detection of a leakage current comprising a power cable having an insulated first and a second wire. The power cable has a...
7619860 Electrical wiring device  
The present invention is directed to a protective device that includes a hot line terminal, a neutral line terminal, a hot load terminal, and a neutral load terminal. A low pass filter circuit has...
7609497 Residual-current-operated protective device  
A switching device for disconnecting and switching at least one line of a power supply is disclosed. The switching device may be, for example, a residual-current-operated protective device or a...
7586395 Electrical switching apparatus and trip actuator assembly therefor  
A trip actuator assembly is provided for a circuit breaker including a housing having a mounting surface, separable contacts enclosed by the housing, and an operating mechanism structured to open...
7576960 Circuit protection device with automatic monitoring of operation fault  
A circuit interrupter device having a circuit module that automatically monitor the operation of the device and contains a master control system that periodically sends out an impulse that...
7576959 Circuit interrupting device with automatic end-of-life test  
The present invention provides a novel circuit interrupting device capable of performing an automatic end-of-life test using a status test switch (KR- 1 ), when the device is properly wired and the...
7558033 Arc fault circuit interrupter and method of parallel and series arc fault detection  
An arc fault circuit interrupter includes separable contacts, a neutral conductor, an operating mechanism structured to open and close the separable contacts, at least one current sensor structured...
7558034 Bi-directional ground fault circuit interrupter  
The present invention relates to a family of resettable circuit interrupting devices that eliminates the need to rewire a resettable circuit interrupting device after it is installed and powered up...
7538647 Ground fault circuit interrupter device  
A ground fault circuit interrupter device is described.
7514932 Method of recognizing signal mis-wiring of a three-phase circuit  
A signal analyzer for calculating the power consumption and power factor of a three-phase power system driving a motor includes logic that determines whether the analyzer's own input terminals are...
7499250 Systems, devices, and methods for temperature compensation in arc fault detection systems  
Certain exemplary embodiments comprise a method, which can comprise configuring a system to compare an electrical value and a selected pre-stored threshold value of a plurality of pre-stored...
7492558 Reset lockout for sliding latch GFCI  
Resettable circuit interrupting devices using a center latch are provided. The circuit interrupting devices include those with a reset lockout, reverse wiring protection, and/or an independent trip...
7463465 Series arc fault current interrupters and methods  
A circuit interrupter for interrupting current on a line conductor is provided. The circuit interrupter includes separable contacts, a trip mechanism, a bimetal, a microprocessor, a series arc...
7443309 Self testing ground fault circuit interrupter (GFCI)  
A self testing fault detector having a line side and a load side and a conductive path there between, said apparatus is provided. The self testing fault detector includes a controller, adapted to...
7440246 Circuit interrupting apparatus with remote test and reset activation  
The present disclosure relates to resettable circuit interrupting devices and apparatus capable of being tested and reset from remote locations, and in particular to portable circuit interrupting...
7440245 Arc fault circuit interrupter and method of detecting an arc fault  
An arc fault circuit interrupter includes separable contacts, an operating mechanism adapted to open and close the separable contacts, and a trip mechanism cooperating with the operating mechanism...
7432618 Inverter anti-islanding method  
A method for detecting and interrupting an electrically islanded condition for a grid connected current source inverter is disclosed in which: A line voltage frequency is monitored at a cycle or...
7423854 Interruption circuit with improved shield  
An interrupter circuit is disclosed for interrupting power in a power cable from a power source. The power cable comprises an insulated line wire and an insulated neutral wire with a conductive...
7417834 Shutoff system for pool or spa  
A control system for a bathing installation which has one or more electrically powered devices. A line voltage service is connected through a GFCI to power the electrically powered devices, the...
7405912 Arc fault detection apparatus using microcomputer  
The present invention relates to an arc fault detection apparatus using a microcomputer, which divides current paths into a low current path and a high current path depending on the intensity of...
7403086 Ground fault circuit interrupter with reverse wiring protection  
A new type of switching mechanism for a ground fault circuit interrupter (GFCI) with reverse wiring protection preferably includes two pairs of fixed contact holders, each member of each pair...
7400481 Low cost arc fault detection technique  
Low cost apparatus and methods of detecting arc faults for better discriminating electrical events. The arc fault detection apparatus includes a current sensor, a di/dt input sense circuit, a dv/dt...
7359168 Arc fault circuit interrupter and method for disabling series arc protection during current transients  
An arc fault circuit interrupter includes a line terminal, a load terminal, separable contacts electrically connected between the line terminal and the load terminal, and a current sensor...
7345860 Load recognition and series arc detection using load current/line voltage normalization algorithms  
A method and system for determining whether arcing is present in an electrical circuit. The methods includes sensing a change in an alternating current in the circuit and developing a corresponding...
7292011 Electrical protection of a generator controller  
A generator system includes a generator control for providing electrical power to a main generator. The main generator is mechanically coupled to an electrical power source that provides electrical...
7268989 Arc fault circuit interrupter for a compressor load  
An arc fault circuit interrupter includes separable contacts electrically connected between line and load terminals, and a current sensor adapted to sense current flowing between the terminals and...
7265956 Ground fault circuit interrupter containing a dual-function test button  
The present invention provides a circuit interrupting device, preferably a ground fault circuit interrupter (GFCI), which contains a dual-function test button having a short pole and a long pole...
7242557 Residual current device with double grounded neutral fault detection  
A residual current device (RCD) senses a differential current flowing in A.C. mains supply live and neutral conductors and disconnects the supply from a load when the differential current exceeds a...
7224559 Differential current detection  
A detection circuit detects a difference between a source current and a return current. The detection circuit includes a constantly biased magnetic core through which conductors of the source and...
7221548 Residual-current circuit breaker and a method for testing the reliability performance of a residual-current circuit breaker  
A test circuit is provided, which is independent of a power supply and which enables a circuit breaker to be tested in a reliable manner. The test circuit includes a test coil which is devoid of...
7167349 Earth leakage breaker  
An earth leakage breaker includes a main contact, a switch mechanism, an operating handle, a leakage tripping device and an over-current tripping device having an earth-leakage-detection circuit...
7161780 Circuit interrupting device with single throw, double mode button for test-reset function  
A typical duplex GFCI receptacles has two buttons, a test button that, when pressed, shuts off power to the receptacle and down stream devices, and a reset button that, when pressed, restores power...
7149065 Self testing digital fault interrupter  
A fault interrupter apparatus having a line side and a load side and a conductive path there between. The apparatus includes a solenoid that is adapted to move a plurality of contacts disposed in...
7142403 Method for detection of a ground fault, which occurs in the vicinity of a neutral point in an electrical device, as well as an apparatus for carrying out the method  
The invention relates to a method for detection of a ground fault ( 18 ), which occurs in the vicinity of a neutral point ( 22 ), in a polyphase electrical device which is operated at a fundamental...
7099130 Voltage monitor for ground fault circuit interrupter  
A voltage monitor module is operable to monitor a characteristic of an input voltage to a Ground Fault Circuit Interrupter (GFCI) device and generate a fault signal that causes the GFCI device to...
7042688 Neutral switch test mechanism for a circuit interrupter  
Resettable circuit interrupting devices, such as GFCI devices, that include neutral fault test simulation.
7019952 Receptacle device having circuit interrupting and reverse wiring protection  
A circuit interrupting system has an upper cover, an intermediate support, and a base. A mounting strap is installed between the upper cover and the intermediate support, and a electric circuit...
6982857 Electromagnetic wave shield device  
Disclosed is a device for shielding an electromagnetic wave. The electromagnetic wave shield device comprises a relay having a contact selectively connected to a first terminal or a second terminal...
6888708 Method and apparatus for control and detection in resistance grounded electrical systems  
A ground fault detector for use in resistance grounded electrical systems. In one embodiment, the system includes a digital processor to monitor an electrical parameter of the resistance to...
6856498 Ground fault circuit interrupter with indicator lamp and protective circuit powered from hot bus bar of interrupting contacts  
An AC power line protection device which includes a protection circuit which guards against miswiring also has an indicator lamp which lights when the device is in the tripped condition and turns...
6829124 Ground fault circuit interrupter with functionality for reset  
A fault circuit interrupter with functionality for reset can include a relay that trips a first circuit when a ground fault or other error is detected in the first circuit. The relay can be a...
6807035 Fault interrupter using microcontroller for fault sensing and automatic self-testing  
A fault interrupter having a microcontroller is provided to detect actual faults. The fault interrupter initiates a periodic self-test and provides external notification to the user upon successful...
6804093 Apparatus and method for protecting grounding electrode conductors from overcurrents  
A safe method and apparatus for interrupting electric utility ground and open neutral fault currents and isolating customer's grounding system from utility's neutral utilizing thermal-magnetic...
6798631 Convenience safety timer  
An electrical timer having pre-set options, electronically set via e-prom and microprocessor or other solid-state circuitry, for the activation of an electrical receptacle, with ground-fault...
6731482 Ground fault circuit interrupter  
A sensing configuration for a ground fault circuit interrupter for devices having an internal or floating ground electrically isolated from an external ground. The sensor includes a conductor...
6693778 Diode fault detection and ground fault detection systems  
The new Ground Fault Detection and Diode Fault Detection (GFD/DFD) Systems have rotating and stationary component assemblies. The rotating assembly has four interface modules, which are normally...
6646837 Active ground current reduction device  
A device inserted between a grounded poly-phase external voltage source and a load providing low insertion loss for differential mode currents and high insertion loss for ground currents. The...
Matches 1 - 50 out of 174 1 2 3 4 >