WO2011090464A1 - Procédé et appareil destinés à la détection de défauts d'arc et de leur localisation dans des câblages électriques confinés - Google Patents

Procédé et appareil destinés à la détection de défauts d'arc et de leur localisation dans des câblages électriques confinés Download PDF

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Publication number
WO2011090464A1
WO2011090464A1 PCT/US2010/003184 US2010003184W WO2011090464A1 WO 2011090464 A1 WO2011090464 A1 WO 2011090464A1 US 2010003184 W US2010003184 W US 2010003184W WO 2011090464 A1 WO2011090464 A1 WO 2011090464A1
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WO
WIPO (PCT)
Prior art keywords
alarm
signal
period
detected signal
clocking
Prior art date
Application number
PCT/US2010/003184
Other languages
English (en)
Inventor
James L. Brown
Robert W. Armstrong
Thomas J. Fee
Ronald Aaron Marks
Original Assignee
Brown James L
Armstrong Robert W
Fee Thomas J
Ronald Aaron Marks
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Brown James L, Armstrong Robert W, Fee Thomas J, Ronald Aaron Marks filed Critical Brown James L
Publication of WO2011090464A1 publication Critical patent/WO2011090464A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
    • H02H1/0015—Using arc detectors
    • H02H1/0023—Using arc detectors sensing non electrical parameters, e.g. by optical, pneumatic, thermal or sonic sensors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/08—Locating faults in cables, transmission lines, or networks
    • G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
    • G01R31/083—Locating faults in cables, transmission lines, or networks according to type of conductors in cables, e.g. underground
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
    • G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
    • G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
    • G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements

Definitions

  • FIG. 1 shows a typical electrical outlet as installed in the wall of a house or other structure. Electrical box 21 is mounted to wall stud 20. While such electrical boxes are often nailed to a stud, there are a variety of methods for securing an electrical box to a stud, depending upon the details of the construction. Electrical outlet 22 is shown secured within electrical junction box 21. Insertion and removal of a power cord plug into and out of electrical outlet 22 can cause mechanical movement of the outlet vis-a-vis electrical supply cable 23.
  • Such electrical boxes 21 may also be used in conjunction with metal conduit to protect conductors 24. While metal conduit reduces the possibility of external damage to the conductors, such metal conduit can present sharp edges that can initiate electrical faults.
  • staple 25 attaches supply cable 23 to stud 20. Here staple 25 is shown passing through cable 23 instead of straddling around the outer insulation of the cable. A staple passing through a cable reduces the insulating properties of the cable and individual conductor insulation. While construction of this type should serve without anomaly for many years, when the insulation begins to break, or environmental factors degrade the insulation, such situations may make wires vulnerable to the existence of electrical faults.
  • exit bend 26 in cable 23 can cause stress loads on the conductors within the cable, which may, over time, result in a high resistance fault. It is known that high resistance or impedance electric arcs emitted by faults in electrical wiring or electrical distribution circuitry in a building structure may emit high frequency sounds in the range of 28-32 KHz, frequencies above normal human hearing range, but within the range of animals such as dogs and cats. Such high resistance or impedance electrical arcing may ultimately ignite combustible materials.
  • AFCI arc fault circuit interrupter
  • An AFCI device is typically placed into an existing circuit breaker panel, and intended to function as both a circuit breaker and an arc fault breaker.
  • This AFCI device and other such devices utilize the "hard wiring" of the electrical circuitry to detect and isolate a fault.
  • Such prior technology typically isolates and breaks a circuit containing a detected fault in approximately 3/10 of a second.
  • Such systems are similar to ground fault interrupter "GFCI" systems, designed to prevent personnel shock, wherein curtailment of high resistance arcing occurs almost immediately after detection of such an arcing event. Stated otherwise, the prior art systems attempt to stop high resistance arcing almost immediately.
  • AFCI devices do not perform effectively in practice because many electrical devices create a short term resistance arc as a part of their normal operations. For example, small motors such as those in vacuum cleaners, generate arcing at internal motor brush contacts. See, for example, Restrepo, Carlos E, "Arc Fault Detection and Discrimination Methods," 53 rd IEEE Holm Conference on Electrical Contacts, Vol. 16, No. 19, pages 1 15-122, September, 2007. If each short term arcing causes an AFCI or GFCI device to break the circuit, electrical power customers become upset, resulting in customer complaints to electricians and the Consumer Product Safety Commission ("CPSC”), and removal of the safety device by the consumer.
  • CPSC Consumer Product Safety Commission
  • Objects of this invention include providing methods, systems and devices for detecting high resistance electrical faults, and for identifying the locations thereof, even when the electrical wiring or other equipment in which such a fault occurs is hidden from view within a wall, ceiling or like structure.
  • the invention disclosed and claimed in this application may generally be called an early warning fire detector for alerting a property owner or occupant to the fact that a potentially dangerous high resistance or impedance electrical arc exists and may, over a period of time, cause a fire within a wall, ceiling or other enclosed location concealing electrical distribution circuitry.
  • the inventive detector is designed so that it will alert occupants only to signals that indicate the existence of a prolonged arcing event, which if not stopped may cause damage by wood pyrolysis or a fully blossomed fire.
  • High resistance or impedance faults in electrical wiring typically emit high frequency sounds in the range of 28 to 32 KHz, which is above the range of normal human hearing.
  • the inventive detector includes a microphone and/or RF receiver capable of detecting sounds in a 20 to 60 KHz range.
  • the detector will then initiate an alert signal such as activating a horn, which notifies occupants that there is a dangerous condition present in the area.
  • the detector is capable of receiving and recognizing signals emitted by high resistance or impedance faults in electrical wiring at distances up to about thirty feet from a source fault. And, the detector can receive and process such signals even though they are emitted through walls and building materials such as wooden 2" x 4" studs and gypsum wall board, and/or wood paneling, for example.
  • the occupant of the structure, or an electrician, fireman from the local fire department, or other knowledgeable person may establish the location of the fault emitting the signal using a hand held locater device tuned to detect signals within the 20-60 KHz frequency range.
  • the occupant, electrician or other knowledgeable person may then deactivate or turn off at the control panel the particular circuit that includes the detected fault so that appropriate repairs can then be made to that circuit.
  • the inventors identified certain problems that were precursors of electrical fires apparently caused by high resistance or impedance electrical arcing at a fault in electric wiring.
  • a pet dog had been scratching a wall near the location where the electrical fire started, but after the fire occurred, the dog ceased such behavior.
  • a pet dog had tried day and night to enter a garage area of the dwelling where an electrical fire subsequently started. However, after the fire, the dog no longer sought to enter that garage area.
  • the inventors realized that in such instances, the dogs had likely been able to hear sounds having frequencies above the range of normal human hearing, and the dogs were apparently irritated by such continuing high frequency sounds, resulting in attempts by the dogs to seek to eradicate the apparent source of such high frequency irritating sounds.
  • Fig. 1 shows a partially schematic, perspective view of an electrical outlet box with outlets therein and electrical wiring entering the rear of the box, which is attached to a vertical wall support stud, as in the interior of a wall of a building;
  • Fig. 2 shows a block diagram of circuitry and apparatus elements for detection of a fault in electrical wiring, even if the wiring and fault are concealed from view within a wall such as that partially illustrated in Fig. 1 ;
  • Fig. 3 shows an exterior view of an embodiment of an electrical fault detector suitable for mounting on the exterior of a wall or ceiling;
  • Fig. 4 is a partially schematic, cross-sectional view of an embodiment of a portable locator unit that includes a location detection receiver for locating a fault in electrical wiring;
  • Fig. 5 is a block diagram of the functional elements of an arc fault detector
  • Fig. 6 is a circuit diagram for one embodiment of principal elements of the interval timers and control logic identified in block 500 of Fig. 5;
  • Fig. 7A is a timing diagram schematically showing the functions of the comparator, main timer, watchdog timer, master clock, and alarm, during and beyond a period of continuous monitoring of arc fault noise to an alarm arming time (so-called "case I");
  • Fig. 7B is a timing diagram schematically showing the functions of the same elements as in Fig. 7A, except here during a continuous monitoring period of arc fault noise of duration less than the full period to alarm arming, then stopping for a relatively short period, and thereafter resuming monitoring for the remainder of the full period to alarm arming (so-called "case II"); and
  • Fig. 7C is a timing diagram schematically showing the functions of the same elements as in Figs. 7A and 7B, except here during a period of continuous monitoring of arc fault noise of duration less than the full period to alarm arming, then stopping for a period that exceeds in duration a predetermined arc fault noise interruption period, thereby resulting in cessation, or cessation and restarting of a fault noise monitoring period.
  • the present invention may be understood to include a method of detecting the existence of possibly dangerous high resistance electrical arc faults in electrical wires or equipment, methods for locating such faults, as well as apparatus and devices for carrying out such methods, including an electrical fault detector device, and a portable fault locator unit.
  • the inventive method for detecting the existence of a possibly dangerous high resistance electrical arc faults in electrical wires or equipment typically comprises monitoring an area proximate electrical wiring or equipment that may be susceptible to high resistance electrical arc faults, using a detector which is capable of detecting sounds in the frequency range of about 20 to about 60 KHz.
  • a detector which is capable of detecting sounds in the frequency range of about 20 to about 60 KHz.
  • Such longer time monitoring can confirm that a detected sound is indeed indicative of a continuing danger, and not merely a transient signal from normal use of nearby electrical appliances.
  • the presence of a possibly dangerous electrical arc fault may be announced by light or sound from an alarm, whereupon steps may be taken to learn the exact location of the arc fault generating the high frequency sound detected by applicants' detector device.
  • Fig. 2 schematically illustrates a block diagram of circuitry of one embodiment of a detector of high resistance electrical arc faults.
  • power may be supplied to the high resistance electrical arc fault detection circuitry from either an electrical outlet or a portable source such as batteries.
  • Power supply 40 supplies power to high gain amplifier 41 , which amplifies a signal from one or more audio sensors 42.
  • Sensor 42 is selected based upon a peak frequency which is emitted from high resistance electrical arc faults.
  • a high resistance electrical arc fault creates localized resistance heating, and emits a resonance frequency based upon its resistance, capacitance, inductance, and AC cycling.
  • band pass filter 43 minimizes extraneous signals such as, but not limited to, speech, insect noise, air conditioning noise, and other background noises, to attempt to ensure that only the sounds at frequencies believed to be from a high resistance electrical arc fault continue to pass through the elements of the detector system. From band pass filter 43, such signals are then analyzed according to an analysis algorithm 44. The filter 43 and analysis software 44 reduce undesirable instances of false alarms.
  • Analysis algorithm 44 may be constructed as hard wired logic, or as a software algorithm, and discriminates between background noise sounds and the sounds created by high resistance electrical arc faults. Band pass filtering can also be performed with software. Analysis algorithm 44 establishes a base line of background sounds used to determine whether a change in an acoustical base line has occurred, which would indicate the presence of a high resistance electrical arc fault. When such a high resistance electrical arc fault has been detected, the sensor activates signaling means 45.
  • Signaling means 45 may be any suitable means, such as an audible alarm, or a signal light, which may be transmitted wirelessly or through hard wires to connect to the internet, phone line, or emergency services that can provide further diagnostics and assistance before a detected arc fault causes a damaging fire.
  • Fig. 3 illustrates an exterior view of a high resistance arc fault detector 60 suitable for mounting on a wall or ceiling in a building or structure. This device is typical of existing household smoke, fire, and/or carbon monoxide sensor-alarms. The device has an essentially flat back 61 that permits the device to be mounted on a wall or ceiling. For detecting smoke or carbon monoxide, air to be sensed must pass through top vent 62 and out bottom vent 63.
  • Detector 60 includes an audio sensor 67, and the detector is mounted to a wall, ceiling or other surface to serve the area of the structure to be monitored.
  • the housing of detector 60 can be configured in any functional manner, including shapes to facilitate mounting of such detectors on vertical walls to facilitate sensing down hallways or through rooms instead of mounting on a ceiling where the effective region monitored by the device is directly under the device.
  • embodiments of devices like that shown in Fig. 3 may include multiple test, sensor or indicator elements for testing and identifying different substances and environmental indicators, such as smoke, fire 64, carbon monoxide 65, high resistance arc faults 66, as well as temperature and other sounds, or the like.
  • multiple sound detectors may be used within a given detector device to ensure early and accurate detection of arc fault sounds.
  • the use of multiple sonic sensors within a single unit can provide indications of the direction or multiple directions from which sounds produced by high resistance electrical arc faults originate, thus facilitating discovery of the location of such faults.
  • Fig. 4 is a partially schematic, cross-sectional view of a portable, hand held locator unit 80 including a directional detection receiver.
  • a hand held device permits an operator to search rooms, walls, ceilings, floors and other portions of a building or other structure to seek the location of a high resistance electrical arc fault which is often out of sight behind wall board, sheet rock, dry wall, flooring, ceiling or roofing materials of which a structure is built.
  • the device of the present invention facilitates location of high resistance electrical arc faults to permit efficient and less costly repair of the damaged portion of the electrical wire or appliance.
  • the hand held fault locator 80 resembles a large flashlight with an attached ear horn-like funnel 88 with large end opening 81 for focusing sound onto one or more sensors 82 located at the interior base of ear horn 88.
  • sensor 82 is electrically connected to a circuit board supporting electronic elements 83, including high gain amplifier 41, band pass filter 43, and signaling means 45, as shown and described in conjunction with Fig. 3.
  • the Fig. 4 embodiment includes a signaling or alarm display element 85 such as a barcode, LED or LCD display for indicating the volume or amplitude strength of signals originating from a detected high resistance electrical arc fault.
  • circuit board 83 may include additional or other elements which comprise a suitable detector circuit for detecting high resistance electrical arc faults.
  • the portable, hand held locator 80 schematically illustrated in Fig. 4 includes switch 86 which when turned to the on position supplies power from one or more batteries 87 to power the electronics on circuit board 83.
  • batteries may be rechargeable.
  • an operator can grip the outer handle 84 and direct ear opening 81 toward different areas of a structure being monitored to determine the location where a detected arc fault signal is most strong.
  • such a hand held locator device may include gain adjustment circuitry and manual adjustment elements to permit tuning of the device for increased sensitivity.
  • an operator can identify the location of an arc fault to within several inches of the damaged electrical wiring or portion of an electrical device or appliance, remove only a small section of wall board or other building structure, or an electrical box or affected portion of an appliance, to repair the anomaly before any damaging electrical fire occurs.
  • hand held device 80 as schematically illustrated in Fig. 4 includes three or more sensors within the listening ear, or multiple acoustic sensors each having its own circuit board, the hand held device may effectively indicate the direction of one or more arc fault noise signals without the need for pointing the device in different directions to determine the directional location from which a strong signal is detected.
  • high resistance arc fault detectors and locators have been disclosed and described herein, it will be apparent to those skilled in this art that the configuration in which the disclosed elements of such detectors are arranged are quite numerous, while still embodying and utilizing the methods and structures of the present invention. Additional embodiments of the arc fault detector of the present invention typically comprise seven main functional elements as shown in Fig. 5.
  • a commercially available off-the shelf omnidirectional acoustic transducer 100 having a frequency response from 20 to 60 kilohertz (KHz).
  • the acoustic sensor/transducer 100 may be, for example, a Type 40BD prepolarized pressure microphone available from G.R.A.S. Sound & Vibration, Holte, Denmark.
  • the acoustic sensor 100 generates an input to a commercially available high frequency amplifier 200, such as an LM384 audio power amplifier available from National Semiconductor Corporation.
  • the amplifier output is connected to a bandpass filter 300 to remove all frequencies outside the range of about 20-60 KHz.
  • the bandpass filter output 350 inputs to a standard threshold detector 400 which converts the amplified and filtered acoustic signal to digital logic levels.
  • Both bandpass signal 300 and threshold detector 400 may include, for example, an LM741 operational amplifier, available from National Semiconductor Corporation. If no audio signal is present in the frequency range 20-60 KHz, the threshold detector output 450 is at logic level 0. Audio within the range of 20-60 KHz produces a logic 1 output 450.
  • the threshold detector output 450 is one of two inputs to interval timers and control logic 500.
  • the interval timers and logic control 500 use standard digital logic components which may be either 7400 series TTL or 4000 series CMOS chips such as AND and NAND gates, inverters and D and JK flip-flops.
  • the second input is from a 1 Hz master clock 800.
  • the master clock comprises standard off-the-shelf circuitry to generate a conditioned 1 Hz logic level square wave clock frequency.
  • the interval timers and control logic 500 are described in detail below.
  • the output of the interval timer and control logic 500 is connected to a commercially available alarm driver 600 which produces an appropriate voltage and electrical current signal to operate alarm indicator or annunciator 700. This can be as simple as turning on a light or as complex as turning off power to a building, depending on the requirements of the application.
  • the threshold detector output 450 is connected to the set input of a set-reset latching flip flop 502.
  • Latched signal 503 forms a gate signal input to two-input AND gate 504 to create 1 Hz clock input 505 to the main timer 506.
  • the function of the main timer is to count the predetermined delay time, in this case, one hour, in seconds (3600 seconds) on clock input 505 when threshold detector output signal 450 switches from low logic level (logic 0) to high logic level (logic 1).
  • the positive edge of 405 is inverted producing a negative edge 51 1 to the clock input of negative edge-triggered D-flip-flop 515 setting its output 516 to logic 1 and forming one of two enabling signals for the watchdog timer 510.
  • Loss of a detected signal 450 creates a negative edge which triggers D-flip-flop 512 setting its output 513 to logic 1 , creating the second of the two required enabling signals for the watchdog timer.
  • the master clock 501 is then gated through the 3 -input AND gate 514, and the watchdog timer begins to count up to its pre-determined interval (for example, five minutes or 300 seconds).
  • the cascaded J-K flip flops count the main timer delay time. Any standard digital logic timer or counter implementation can be used.
  • the output of the main timer 506 switches from logic 0 to logic 1 when the timer has counted 3600 clock pulses (see 505).
  • the main timer output 507 is latched by a second R-S flip-flop 508 to form the alarm output 550.
  • An alarm manual reset 509 connected to the reset input of the R-S flip-flop allows the entire system to be reset to its initial state. This input is connected through an OR gate to all J-K and R-S flip-flops to restore the logic state to that which existed before the threshold detector output 450 transitioned from logic 0 to logic 1.
  • the negative edge transition 51 1 clocks the output of the D-flip-flop 515 to go to logic 0, preventing the master clock signal from clocking the watchdog timer 514.
  • the Q output of 515 and the Q-bar output of 512 and ANDed 520 cause the output of the D-flip-flop 521 to go to logic 0.
  • the next master clock pulse causes the output of NAND gate 522 to output a logic 1 pulse which is connected through an inverter to the CLR inputs of the watchdog timer JK and D-flip-flops, thus clearing the watchdog timer.
  • the main timer 506 continues to count uninterrupted to its predetermined main delay time, 3600 seconds.
  • Figs. 7A-7C are schematic digital logic timing diagrams showing relationships between logic level (0 or 1) on the vertical axis versus time on the horizontal axis.
  • Fig. 7A illustrates case I wherein a detectable arcing signal from the threshold detector output 450 in Fig. 6 is present for a time period greater than or equal to the minimum alarm time of one hour (3600 seconds).
  • Fig. 7B illustrates case II wherein the detected arcing signal 450 stops during the one hour minimum alarm time for a period of less than the maximum allowable five minute (300 second) watchdog time.
  • Fig. 7A-7C are schematic digital logic timing diagrams showing relationships between logic level (0 or 1) on the vertical axis versus time on the horizontal axis.
  • Fig. 7A illustrates case I wherein a detectable arcing signal from the threshold detector output 450 in Fig. 6 is present for a time period greater than or equal to the minimum alarm time of one hour (3600 seconds).
  • Fig. 7B illustrates case II wherein
  • FIG. 7C illustrates case III wherein the detector output 450 stops (logic level 0) for a period exceeding the 300 second watchdog time. Signal numbers correspond to those in Fig. 6. The same group of timing signals is shown for each of cases I-III in Figs. 7A-7C, respectively.
  • Application of electrical power to the detector initiates a power-on sequence that resets the device in condition ready to detect sounds within its detection range of about 20 KHz to about 60 KHz.
  • the master clock signal 501 is a 1 Hz digital logic clock signal that runs constantly.
  • threshold detector output 450 changes to logic level 1
  • a "run" command 503 is generated allowing the main timer to begin counting up to its alarm level of 3600 seconds.
  • the main timer outputs a pulse 507 that latches alarm signal 550.
  • Case II begins like case I when output 450 starts the master timer.
  • output 450 changes back to logic level 0, that is arcing stops before the master timer reaches its alarm count of 3600 seconds.
  • Output 450 at logic 0 causes the watchdog timer run signal 514 to be at logic 1. This allows the watchdog timer to begin counting up to its maximum of 300 seconds. In this mode, the master timer continues to count up toward 3600 seconds.
  • output 450 returns to logic 1 the watchdog timer is reset to 0 seconds by the clear inputs 522. The master timer continues to count up to 3600 seconds and alarm output as in case I.
  • Case III Fig. 7C, also begins like case I.
  • the watchdog timer starts, that is 514 goes to logic 1.
  • the watchdog timer output 518 is a pulse that resets both the main and watchdog timers to 0 seconds, and clears the master timer run latch output 503 preventing any further counting by either the master or watchdog timers until output 450 again goes to logic level 1, when case I begins again.
  • Alarm arming 550 never goes to logic 1 in this case III.
  • inventive methods and devices that perform those methods are designed to detect only high resistance arc faults that are most likely to pose a real danger of soon causing a damaging fire, while avoiding undesirable, overly frequent alarms due to transient sounds caused by events unlikely to soon cause a damaging fire.

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  • Alarm Systems (AREA)

Abstract

La présente invention concerne des procédés et des dispositifs destinés à la détection de l'existence de défauts d'arc électrique potentiellement dangereux dans des câbles ou des équipements électriques, en surveillant les câbles ou les équipements électriques en utilisant un détecteur acoustique pour détecter des signaux ayant une fréquence allant d'environ 20 à environ 60 kHz, et en chronométrant les signaux sur la durée d'une période d'armement d'alarme, activant ainsi une alarme. Ceci peut inclure l'arrêt d'un signal détecté et la reprise dudit signal dans un court laps de temps prédéterminé chronométré par un autre minuteur. Un dispositif de détection met en œuvre les procédés, et un dispositif de détection/localisation simplifié localise la source des signaux de défaut d'arc.
PCT/US2010/003184 2010-01-21 2010-12-16 Procédé et appareil destinés à la détection de défauts d'arc et de leur localisation dans des câblages électriques confinés WO2011090464A1 (fr)

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Application Number Priority Date Filing Date Title
US29697810P 2010-01-21 2010-01-21
US61/296,978 2010-01-21

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WO2011090464A1 true WO2011090464A1 (fr) 2011-07-28

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104180477A (zh) * 2014-08-15 2014-12-03 珠海格力电器股份有限公司 空调系统的控制方法及空调系统
WO2015091071A1 (fr) 2013-12-17 2015-06-25 Commissariat A L'energie Atomique Et Aux Energies Alternatives Detection d'arcs electriques
WO2015101426A1 (fr) * 2013-12-31 2015-07-09 Siemens Aktiengesellschaft Dispositifs et procédés de détection de défaut d'arc
IT202000004303A1 (it) * 2020-03-02 2021-09-02 St Microelectronics Srl Circuito per rilevare scariche parziali, dispositivo, sistema e procedimento corrispondenti

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4437032A (en) * 1981-09-23 1984-03-13 Egon Gelhard Sensor for distance measurement by ultrasound
US20020024782A1 (en) * 2000-08-22 2002-02-28 Cheon-Youn Kim Overload circuit interrupter capable of electrical tripping and circuit breaker with the same
US20030169051A1 (en) * 2002-03-05 2003-09-11 Tallman David M. Testing device for detecting and locating arc faults in an electrical system
US20060164097A1 (en) * 2005-01-12 2006-07-27 Eaton Corporation Electrical switching apparatus and method including fault detection employing acoustic signature
US20070047161A1 (en) * 2005-08-31 2007-03-01 Eaton Corporation Circuit breaker tester including a pulse width modulation circuit
US20070057678A1 (en) * 2005-09-13 2007-03-15 Square D Company Arc fault circuit interrupter system
US20080024140A1 (en) * 2006-07-27 2008-01-31 Jeremy Henson Devices, systems, and methods for adaptive rf sensing in arc fault detection

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4437032A (en) * 1981-09-23 1984-03-13 Egon Gelhard Sensor for distance measurement by ultrasound
US20020024782A1 (en) * 2000-08-22 2002-02-28 Cheon-Youn Kim Overload circuit interrupter capable of electrical tripping and circuit breaker with the same
US20030169051A1 (en) * 2002-03-05 2003-09-11 Tallman David M. Testing device for detecting and locating arc faults in an electrical system
US20060164097A1 (en) * 2005-01-12 2006-07-27 Eaton Corporation Electrical switching apparatus and method including fault detection employing acoustic signature
US20070047161A1 (en) * 2005-08-31 2007-03-01 Eaton Corporation Circuit breaker tester including a pulse width modulation circuit
US20070057678A1 (en) * 2005-09-13 2007-03-15 Square D Company Arc fault circuit interrupter system
US20080024140A1 (en) * 2006-07-27 2008-01-31 Jeremy Henson Devices, systems, and methods for adaptive rf sensing in arc fault detection

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015091071A1 (fr) 2013-12-17 2015-06-25 Commissariat A L'energie Atomique Et Aux Energies Alternatives Detection d'arcs electriques
WO2015101426A1 (fr) * 2013-12-31 2015-07-09 Siemens Aktiengesellschaft Dispositifs et procédés de détection de défaut d'arc
US10281515B2 (en) 2013-12-31 2019-05-07 Siemens Aktiengesellschaft Devices and methods for arc fault detection
CN104180477A (zh) * 2014-08-15 2014-12-03 珠海格力电器股份有限公司 空调系统的控制方法及空调系统
IT202000004303A1 (it) * 2020-03-02 2021-09-02 St Microelectronics Srl Circuito per rilevare scariche parziali, dispositivo, sistema e procedimento corrispondenti

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