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7579843 |
Methods and apparatus for analyzing partial discharge in electrical machinery
Methods and apparatus for analyzing electrical insulation of an electrical machine are provided. The method includes receiving a first signal that includes a plurality of partial discharge pulses...
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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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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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7532012 |
Detection and monitoring of partial discharge of a power line
There is provided a method that includes (a) determining a characteristic of a fundamental spectral component of a spectrum of a power spectrum of noise on a power line, and (b) determining a...
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7521915 |
Wafer bevel particle detection
An apparatus adapted to detect a particle present on a bevel of a wafer. The apparatus includes a substrate support and a sensor housing adapted to receive an edge of the wafer. The sensor housing...
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7514936 |
Detection and suppression of electrical arcing
Method and apparatus for detecting or suppressing electrical arcing or other abnormal change in the electrical impedance of a load connected to a power source. Preferably the load is a plasma...
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7514935 |
System and method for managing power supplied to a plasma chamber
A system and method for managing power delivered to a processing chamber is described. In one embodiment power is delivered to the processing chamber with a power cable, the power cable storing...
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7514934 |
DC bias voltage measurement circuit and plasma CVD apparatus comprising the same
A circuit for measuring DC bias voltage occurring in an ungrounded electrode of a plasma processing apparatus, includes: a first terminal connected between the ungrounded electrode and the RF power...
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7498817 |
Method of nondestructive tightness testing based on gas discharge visualization
A method of nondestructive noncontact tightness testing of inner structure of articles based on gas discharge visualization includes the steps of providing a film for imaging on a dielectric plate...
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7492163 |
Systems, devices, and methods for arc fault detection
Certain exemplary embodiments can include an arc fault detection circuit. The arc fault detection circuit can include a zero crossing analysis sub-system including a counter configured to...
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7489140 |
Apparatus, method and system for spark testing an insulated cable
Apparatus, methods, and systems improve spark testing of insulated cables. According to embodiments described herein, a spark tester includes a conductive housing having an entryway, an exit, and a...
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7489138 |
Differential arc fault detection
A method and apparatus detect arc faults. The method and apparatus may digitally detect current and voltage signals at a master node ( 111 ) positioned at a first point in a wiring system ( 131 )....
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7486082 |
Anomaly detection in inverter system
An inverter system which converts DC input into AC output and supplies the AC output to a load such as an FL tube detects change in a circuit current due to anomaly such as discharge without...
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7463037 |
Devices, systems, and methods for adaptive RF sensing in arc fault detection
A method for arc fault detection, includes automatically generating an output signal responsive to an input signal. The input signal is indicative of an arc fault. The output signal is configured...
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7443640 |
Apparatus for detecting arc fault
Disclosed herein is an apparatus for detecting an arc fault, which prevents a malfunction caused by a conventional current detecting method by detecting a source voltage applied onto a conductive...
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7439744 |
Automated arc generator and method to repeatably generate electrical arcs for AFCI testing
An apparatus for repeatably generating electrical arcs for testing an electrical switching device, such as an arc fault circuit interrupter, includes a stationary electrode and a movable electrode...
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7391218 |
Method and apparatus for generalized arc fault detection
A method and an apparatus detect series and/or parallel arc faults in AC and DC systems. The method according to one embodiment inputs an AC current signal; extracts a fundamental component of the...
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7388384 |
Method and system for monitoring partial discharge in gas-insulated apparatus
A gas-insulated apparatus is equipped with multiple sensors for sensing a partial discharge signal caused by a foreign substance, and a frequency analyzing section for analyzing the frequency of...
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7386411 |
Automatic hi-pot test apparatus and method
An exemplary automatic hi-pot test apparatus ( 20 ) includes a high voltage supply ( 21 ), a transmission device configured for transmitting an electronic device ( 26 ) to be tested, a connecting...
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7372280 |
Method and system for transmitting an information signal over a power cable
The invention relates to a method for inputting an information signal into a power cable which is connected to a voltage supply and which includes at least one or more conductors, a dielectric...
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7323881 |
Process and apparatus for evaluating the degree of vacuum in closed bodies with transparent walls
The invention is based on feeding the closed bodies to be evaluated to a station for the application of high voltage for the formation of the arc across the inner space of the body and capturing...
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7307820 |
Systems, methods, and device for arc fault detection
Certain exemplary embodiments described herein comprise a method comprising a plurality of activities comprising: discriminating an arcing condition from a non-arcing broadband signal, and, in...
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7307429 |
Apparatus for testing an arc fault circuit interrupter
A test apparatus tests an arc fault circuit breaker with an arc fault generator having an input and an output. The test apparatus includes a first electrical connector electrically connected to the...
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7285961 |
Insulation degradation diagnostic device
An insulation degradation diagnostic device ( 1 a ) comprises a current transformer ( 7 a ), a first amplifier ( 15 ), a first high-pass filter ( 17 ), a low-pass filter ( 19 ), a second amplifier...
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7285960 |
Measuring device, and method for locating a partial discharge
A device and a method for locating partial discharges in a conductor rod of a dynamo-electric machine are provided, the conductor rod being provided with an exterior electrical insulation. A first...
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7282924 |
Computerized electricity system having an arc fault detecting sub-system
A computerized electricity system for connecting loads to a power source, including: (a) an arc fault detecting sub-system having at least one module including: (i) a relay unit, electrically...
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7282923 |
Systems and methods for triggering a partial discharge acquisition
A method for triggering a partial discharge acquisition from an energy generating device is described. The method includes generating a power source sensed signal by sensing electromagnetic energy...
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7262606 |
Method of arc detection
New methods are used for detecting arcs in a plasma process that is fed by, for example, a freely oscillating AC generator with an output signal of the AC generator for supplying power. The method...
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7256584 |
Method and system for measuring partial discharge
In the measurement of partial discharge, a voltage detected by an antenna is input to a spectrum analyzer and a phase difference between an operating voltage and a power supply of the spectrum...
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7253640 |
Arc fault detector and method for locating an arc fault
A circuit breaker for locating an arc fault for a protected circuit includes separable contacts interrupting the protected circuit and an arc fault detector determining an arc fault in the...
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7253637 |
Arc fault circuit interrupter system
In order to determine whether arcing is present in an electrical circuit, a sensor signal corresponding to current in said electrical circuit is processed. The sensor signal is filtered to...
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7242291 |
Arc fault circuit interrupter test circuit and test board
A tester for an arc fault circuit interrupter that can selectively simulate and apply electrical arc faults and nuisance loads to at least one device under test (DUT). The tester includes a power...
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7221283 |
Circuit interrupter locator device
A system for identifying a selected electrical circuit of interest from a number of electrical circuits, by locating a circuit interrupter connected to interrupt the flow of electrical power from...
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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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7208958 |
Antenna for detection of partial discharges in a chamber of an electrical instrument
A sensor for picking up partial discharges in an electrical equipment tank filled with a dielectric fluid includes an antenna responsive to the electromagnetic waves generated by such partial...
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7205772 |
Arc fault detector and method
An arc fault detector includes a shunt resistor deployed in a protected circuit, an arc discriminator sensing voltages across the shunt resistor and producing an arc indication deduced from current...
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7202672 |
Partial discharge sensor
A RF current transformer sensor includes a first sensor portion and a second sensor portion. The first and second sensor portions are configured to define a fixed opening for receiving a test...
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7187181 |
Arc detection method utilizing a dynamic processing module
Methods and systems for reliable arc detecting in systems having power signals that experience decay or increase in amplitude. One embodiment of a system for detecting electrical arcs by monitoring...
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7184937 |
Signal repetition-rate and frequency-drift estimator using proportional-delayed zero-crossing techniques
Proportional-delayed zero-crossing frequency-drift estimator devices are provided. Given N-number of time samples, the current zero-crossing time estimation technique uses only two zero-crossing...
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7183776 |
System and method for performing online partial discharge testing
A partial discharge sensing system and method for conducting testing inside an enclosure includes a partial discharge sensor, an access port, and a signal cable. The partial discharge sensor is...
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7183774 |
Method of detecting partial discharges and diagnostic system for electrical apparatus
The invention provides a method of detecting partial discharges in an electrical appliance insulated in a receptacle and a system of diagnosing the state of the appliance using this method. With...
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7180303 |
Simple partial discharge detector for power equipment using acoustic emission technique
The present invention relates to a simple detector for partial discharge with the acoustic emission technique, which provides essentially with an acoustic emission sensor being set on a power...
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7173428 |
Portable circuit interrupter shutoff testing device and method
A portable circuit interrupter shutoff testing device and method, including a high current switch controlled by a timing circuit that allows current to flow through the switch and a small series...
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7161873 |
Method of detecting and locating a source of partial discharge in an electrical apparatus
A method of detecting and localizing a source of partial discharge in an electrical apparatus placed in an enclosure containing an acoustically-conductive fluid. The method consists in:
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7154279 |
Partial discharge detection test link, partial discharge detection system and methods for detecting partial discharge on a power cable
A partial discharge detection test link and system is disclosed to detect partial discharge of a power cable accessory. The power cable accessory includes a first accessory component and a second...
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7145345 |
Current transformers for partial discharge detection on aircraft cables and wires
A technique for detecting defects in aircraft wiring, such as for detecting partial discharges or arcing in wiring or cables is disclosed. A high frequency current transformer (HFCT) is fixingly...
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7112968 |
Method and apparatus for detecting a partial discharge in a high-voltage transmission and distribution system
A method and an apparatus for detecting a partial discharge in a high-voltage transmission and distribution system include detectors which are respectively attached to a power cable and an antenna,...
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7110864 |
Systems, devices, and methods for detecting arcs
Certain exemplary embodiments comprise method, the method comprising a plurality of activities comprising: for each of a plurality of potential arcing events associated with an alternating current:...
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7106069 |
Apparatus for detecting arc fault
An apparatus for detecting an arc fault. The apparatus comprises a current detector for detecting the amount of change of current flowing on the wire and generating a signal proportional to the...
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7081757 |
Re-locatable partial discharge transducer head
An apparatus ( 10 ) for detecting the occurrence of partial discharge in electrical equipment, such as high voltage transformers. The apparatus comprises a detecting means including an ultrasonic...
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