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7623330 |
Ground fault circuit interrupter device
A ground fault circuit interrupter device is described.
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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...
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7619869 |
Electrical circuit breaker
A circuit breaker for multi-phase power includes an opening-closing apparatus configured to open and close each phase of the multiphase power, a detection unit configured to detect a fault current...
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7619861 |
Protective device having a thin construction
The present invention is directed to a wiring device that includes a front cover assembly. The front cover assembly includes a front cover having at least one plug receptacle opening disposed...
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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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7616413 |
Leakage current interrupter
A leakage current interrupter is provided. The leakage current interrupter includes: a leakage current detector having resistors connected to the external metal cover of the power cable, and...
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7612973 |
GFCI receptacle with single button for test-reset function
A resettable circuit interrupting device having a single button for activating a test/reset mechanism. The circuit interrupting device can include a reset lockout and/or reverse wiring protection.
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7612972 |
Electrical contractor current sensing system and method
A current sensing module is provided for contactors and similar switch gear. The current sensing module is packaged so as to be capable of mounting on a line or a load side of a contactor. The...
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7609492 |
Ground fault interrupts for solid state power controllers
A solid state power control scheme is provided with a ground fault interrupt function. Essentially, if a neutral wire is associated with the power supply, the current is sensed in that neutral...
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7608304 |
Substrate carrying method and substrate carrying apparatus
A substrate carrying method for removing the electrical charges on a substrate and then carrying the substrate includes forming a conductive layer with conductivity on a part of the surface of the...
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7598754 |
Input detecting circuit used for electric-leakage protection devices with self-diagnostic function
An input detecting circuit for an electric-leakage protection device with self-diagnostic function includes an analog electric-leakage unit, a magnetic electric-leakage induction ring, an...
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7593200 |
Buck converter fault detection method
A circuit for detecting faults in a converter, the converter including a switching stage having high- and low-side series switches connected together at a switching node and fault circuitry for...
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7592924 |
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 and a trip mechanism having a switch device. In one embodiment, the apparatus a...
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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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7586718 |
Electrical device with circuit protection component and light
An electrical wiring device includes a housing, and a circuit protection component and a light source operably mounted within the housing. In various aspects, the circuit protection component is a...
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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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7586285 |
Ground fault detection device for motor driving circuit
A motor driving circuit includes an inverter circuit including switching devices connected in a bridge manner, electric-current detection resistances connected between the lower switching devices...
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7583483 |
Vehicle AC ground fault detection system
A vehicle ground fault detection system for detecting a ground fault includes a fault detection circuit having a resistance element. The resistance element has one side connected to a supply...
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7580232 |
Arc detection system and method
A system for identifying an arcing event in electrical distribution systems is provided. The system comprises a sensor configured to detect ultraviolet light and to generate a signal indicative of...
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7579581 |
System for optically detecting an electrical arc in a power supply
A system for optically detecting an electrical arc in a power supply. The system includes a light pipe, a photodetector optically coupled to the light pipe, and a signal processor connected to the...
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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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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...
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7576958 |
Relay socket with leakage current suppression
A technique is provided for controlling an operator in a circuit such as a relay circuit. The operator may be a coil in an electromagnetic relay. The coil is energized only when current through a...
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7573692 |
Protective device with improved surge protection
The present invention is directed to an electrical wiring protection device for use in an electric circuit. The device includes a plurality of line terminals configured to be coupled to the...
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7570465 |
Industrial arc fault circuit interrupter and method of detecting arcing conditions
A method of detecting arcing conditions includes sensing current and HF signals therefrom; bandpass filtering the HF signals and providing filtered signals; detecting peak signals and envelopes...
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7564667 |
Electric circuit breaker
An electric circuit breaker comprises a switch to be arranged in the electrical circuit. The switch breaks the electrical circuit in response to a tripping signal. A programmable current threshold...
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7564329 |
Ground fault circuit interrupter device
A ground fault circuit interrupter device is described.
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7561389 |
Alternating-current voltage output apparatus
Inverters, based on signals from a control device, generate a commercial AC voltage across neutral points of 3-phase coils. A Y-capacitor for removing noise is connected to a load outside the...
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7561388 |
Fail-open surge protection system
A surge protection device for providing electrical power to electronic devices and protecting the electronic devices from voltage surges. The surge protection device includes a surge protection...
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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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7554781 |
Protective device with an auxiliary switch
The present invention is directed to a protective device that includes a plurality of line terminals, a plurality of load terminals, and a fault detection assembly coupled to the plurality of line...
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7554454 |
Apparatus and method for simultaneously detecting the power state of a plurality of circuit breaker switches
An apparatus for detecting the power state of a circuit breaker switch is disclosed. The apparatus comprises a detector circuit, a processor and an indicator. The processor is coupled to the...
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7554033 |
Environmentally Protected Wiring Device
The present invention is directed to an electrical wiring device for use in an ambient environment. The device includes a cover assembly characterized by a perimeter defining a user-accessible...
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7551412 |
Wiring fault correction circuit
A wiring fault correction circuit for determining wiring conditions of an AC supply system includes: input line and neutral conductors connectable to the AC supply system; output line and neutral...
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7545244 |
Circuit breaker with independent trip and reset lockout
Resettable circuit breakers having an independent trip mechanism and a reset lockout are provided. The trip mechanism operates independently of the fault protection operations, and the reset...
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7542252 |
Circuit interrupting device having integrated enhanced RFI suppression
A circuit interrupting device such as a GFCI having a network of feed-through capacitors and other passive elements for providing enhanced Radio Frequency Interference (RFI) suppression where the...
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7539581 |
System and method for on-line monitoring and billing of power consumption
The present invention comprises systems and methods related to monitoring of energy usage on a power line. In a preferred embodiment, this system comprises (a) an electronic...
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7538994 |
GFCI that cannot be reset unit wired correctly on line side and power is applied
An apparatus and method for preventing the miswiring of a protection device. The protection device includes line terminals and load terminals. The protection device further includes a latching...
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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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7538557 |
Arc fault and ground fault circuit interrupter tester apparatus and method
Circuit tester apparatuses for identifying arc fault and/or ground fault current leakage on an electrical circuit. The circuit tester apparatuses may have two or three pairs of tester lead wires...
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7536284 |
Electrical wire interconnect system risk assessment tool
A system, method, and computer program product for assessing risk to an aircraft electrical wire interconnect system (EWIS). Information describing an aircraft EWIS, historical failure information,...
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7535687 |
Alarm system sensor topology apparatus and method
An alarm system sensor topology to reduce susceptibility to configuration errors and component failures includes a sensor configured to differentiate between system status conditions, including...
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7535686 |
Control of circuit breakers in a multi-phase power system
There is provided a method of controlling circuit breakers in a multi-phase power system. The method includes (a) recognizing a concurrent presence of a first fault in a first phase of the power...
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7535371 |
Ground fault circuit interrupter with end-of-life protection
A circuit interrupter with end-of-life protection has four components: 1) a control circuit to activate an electromagnetic unit upon detecting a predetermined condition; 2) a fuse coupled between...
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7535234 |
ARC fault detector
An arc fault detector, as a stand alone device or in combination with a circuit interrupting device such as a ground fault interrupter (GFCI), protects from potentially dangerous arc fault...
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7535233 |
Traveling wave based relay protection
An apparatus includes at least one Rogowski coil and a processor. The at least one Rogowski coil is positioned within an electrical power distribution network to detect a first traveling wave...
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7532444 |
Leakage current monitor
A leakage current monitor device suitable for use in or with a Relocatable Power Tap. The device includes a leakage current detector circuit and an alarm circuit coupled thereto. The leakage...
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7529069 |
Apparatus and method for ground fault detection and location in electrical systems
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...
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