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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...
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7586719 |
GFCI failure indicator
A GFCI having a fault indicator device or signaling device that provides a continuous audible/visual indication of a failure condition of the GFCI is disclosed herein. A failure condition may occur...
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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...
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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...
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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...
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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...
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7557330 |
Heated floor panel with integrated controller having ground fault interrupt circuit
A fault protected aircraft heated floor panel is provided. The floor panel includes upper and lower floor panel skins and an electro-resistive heater element interposed between the upper and lower...
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7554333 |
Grounding detector
A grounding detector includes a coupling capacitor connected at one end to an output terminal of a power supply and at another end to a measuring point, a voltage detector to detect a voltage...
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7538993 |
Receptacle circuit interrupting devices providing an end of life test controlled by test button
The present invention provides a circuit interrupting device which can test the conditions of the components in the circuit interrupting device (i.e., the end-of-life test) through the depression...
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7538647 |
Ground fault circuit interrupter device
A ground fault circuit interrupter device is described.
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7525777 |
Fireguard circuit
A fireguard circuit for a power cable, which comprises a power line, a neutral line and a metal sheath surrounding the power line and the neutral line, includes a switch located in one of the...
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7486492 |
Electrical switching apparatus including a second trip circuit responding to failure of a first trip circuit to provide a repetitive signal
A receptacle includes separable contacts, an operating mechanism structured to open and close the separable contacts, and two trip circuits. A first microprocessor-based trip circuit includes a...
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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...
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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...
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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...
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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...
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7375939 |
Relocatable power tap with ground-neutral fault detector
A relocatable power tap having a plug configured to connect to a source of AC power and at least one receptacle. The relocatable power tap also includes a power supply connected to the plug and...
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7298598 |
Wiring device with multi-shot miswire
The present invention is directed to a protective wiring device that includes a plurality of line terminals coupled to a plurality of load terminals by way of at least one conductive path. A...
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7283340 |
Electrical wiring device
The present invention is directed to a protective device that includes a plurality of line terminals and a plurality of load terminals. A wiring state detection circuit is configured to detect a...
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7268559 |
Intelligent life testing methods and apparatus for leakage current protection
An apparatus for testing the life of a leakage current protection device having a leakage current detection circuit. In one embodiment, the apparatus a trip mechanism state generator, a fault alarm...
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7233464 |
Apparatus for and method of ground fault detection
A ground fault detection system is provided where one current sensor is used to calibrate a second sensor in order to provide automatic zeroing of the difference measurement. The calibration is...
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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...
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7215519 |
Ground and line fault interrupt controller/adapter
An adapter module for detecting an electronic fault condition in an electronic circuit is disclosed wherein the adapter module may include electrical fault indicator circuitry. In general, the...
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7196886 |
Reverse wiring detect in circuit interrupting devices
A resettable circuit interrupting device having a switch and timer circuit connected to the line side of the interrupting device to cause a leakage current to flow for a defined interval of time...
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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...
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7113075 |
Power supply methods and apparatus
A detection circuit includes a first power line, a first signal conditioning module operationally coupled to the first power line, a neutral line (N) operationally coupled to the first signal...
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7079365 |
Electrical fault detection system
A microcontroller-based system to detect ground-fault and grounded-neutral conditions in a monitored circuit of an electrical distribution system having line and neutral conductors. The system...
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7064941 |
Aircraft applicable current imbalance detection and circuit interrupter and packaging thereof
The aircraft applicable current imbalance detection and circuit interrupter interrupts an electrical circuit when a current imbalance is sensed. The current imbalance detection and circuit...
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7042688 |
Neutral switch test mechanism for a circuit interrupter
Resettable circuit interrupting devices, such as GFCI devices, that include neutral fault test simulation.
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7031126 |
GFCI that cannot be reset until wired correctly on line side and power is applied
A method and apparatus for a protection device for indicating when ground fault protection is not being provided by the protection device. The protection device includes source and load terminals...
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6873158 |
Circuit protection device with half cycle self test
A circuit protection device connected between two lines of an AC power source self checks for an introduced simulated ground fault every half cycle during a period when a trip SCR cannot conduct....
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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...
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6839208 |
Arc fault circuit interrupter recognizing arc noise burst patterns
An arc fault circuit interrupter (AFCI) detects arc faults by identifying the various signature patterns of arc fault noise while rejecting arc mimicking noise from normal load phenomena.
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6828915 |
Circuit board fault warning system
A fault warning system controls light sources and a warning signal to provide an indication of fatal and non-fatal faults in a communication system. The circuitry uses a pull-down circuit in...
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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...
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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...
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6795285 |
Protective electrical circuit
An appliance is protected against ground faults by a ground fault interrupter (GFI) that sends a signal to an AND gate between the GFI and a controlling microprocessor on one side and a load relay...
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6788504 |
Mobile electric power supply system with deactivatable GFCI protection
A mobile system for use in supplying AC power to different types of electrical loads including those having grounded neutrals as well as those having neutrals that are electrically isolated from...
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6782329 |
Detection of arcing faults using bifurcated wiring system
A zone arc fault detection system for detecting arcing faults in a defined zone of an electrical circuit, such as an aircraft circuit, includes a pair of substantially identical parallel insulated...
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6760202 |
Electrical coil module, an electrical coil comprising such modules, and actuation mechanism including such a coil and a circuit breaker comprising such an actuation mechanism
An electrical coil module of planar type manufactured by printed circuit techniques on a generally flat substrate ( 21 ) has a first layout ( 20 ) of conducing material constituting a first...
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6747856 |
Protective device against fault currents
A device is for protecting against fault currents, even with frequencies of fault currents higher than 1 kHz. Additionally, it is for protecting against fires to dependably protect people. The...
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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...
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6724589 |
Boat electrical test and isolator system
A method and apparatus including indicators and a Ground Fault Current Interrupter (GFCI) are provided to test the marina's power and the boats electrical system load to make sure that both are...
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6650517 |
Ballast safety circuit
A ballast safety circuit is disclosed. The ballast safety circuit includes a sensor in the form a toroid that includes a pair of coil windings for coupling to a pair of input lines on an input side...
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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...
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6639770 |
Current transformer and method for correcting asymmetries therein
A current transformer for a ground fault circuit breaker used on a circuit having at least one line conductor and a neutral conductor includes a toroidal core having a circular opening defining a...
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6639768 |
Arc fault detector immune to dimmer transients and a circuit breaker incorporating the same
Tripping of a circuit breaker by an arc fault detector is blocked by a disable circuit upon detection of a transient associated with cold turn-on of an incandescent bulb powered by a dimmer. The...
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6633472 |
Electric outlet remote control and power protection circuit
A remote control and power protection circuit installed in an electric outlet and adapted to control the operation of each electric socket of the electric outlet by means of a remote controller and...
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6628486 |
Fault detection device with line-load miswire protection
A protection device connected between hot and neutral conductors of an AC power line includes a fault detection circuit which controls a breaker coil operatively associated with a set of...
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6611406 |
Ground fault circuit interrupter incorporating miswiring prevention circuitry
A ground fault circuit interrupter (GFCI) with built in intelligence is described that includes circuitry to automatically indicate a device miswiring condition. When a GFCI is wired with its AC...
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