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公开(公告)号：US10951018B2
公开(公告)日：2021-03-16
申请号：US16131739
申请日：2018-09-14
发明人： Julio E. Acosta
摘要： A ground fault current interrupter circuit includes a plurality of comparators, threshold generation circuitry, and a plurality of timer circuits. Each of the comparators is configured to compare a threshold voltage to a signal representative of a difference of current flow to a load and current flow from the load. The threshold generation circuitry is configured to generate a plurality of different threshold voltages. Each of the different threshold voltages is provided as the threshold voltage for one of the comparators. Each of the comparators is coupled to one of the timer circuits, and the one of the timer circuits is configured to activate a fault signal responsive to activation of an output of the comparator for a time that is related to the threshold voltage provided to the comparator. The time increases with lower values of the threshold voltage.
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公开(公告)号：US10950403B2
公开(公告)日：2021-03-16
申请号：US16123627
申请日：2018-09-06
摘要： A circuit interrupter electrically connects a line terminal to a load terminal in a closed condition and electrically disconnects the line terminal from the load terminal in the open condition. A controller includes a fault detector configured to detect a fault in an electrical signal in a load circuit, such that when a fault is detected on the load circuit, the fault detector causes actuation of the interrupter to the open condition. The controller is adapted to receive an off command, and in response to the off command, generate a simulated fault in the load circuit, such that the fault detector causes actuation of the interrupter to the open condition, such that one and the same interrupter is employed for both fault tripping and commanded tripping.
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公开(公告)号：US10855068B2
公开(公告)日：2020-12-01
申请号：US15997945
申请日：2018-06-05
申请人： Paul Violo , George De Francesca
发明人： Paul Violo , George De Francesca
摘要： A ground fault monitoring system for an electrical service panel is provided. The ground fault monitoring system includes a current transformer coupled to a primary bonding location of the electrical service panel. The ground fault monitoring system also includes a current monitoring device in communication with the current transformer to detect ground fault electrical current returning to the electrical service panel. The ground fault monitoring system also includes a ground fault output interface in communication with the current monitoring device to provide ground fault status of the electrical service panel.
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公开(公告)号：US10852326B2
公开(公告)日：2020-12-01
申请号：US15672762
申请日：2017-08-09
IPC分类号： H02H3/00 , H01H73/00 , G01R19/00 , G01R19/165 , G01R19/20 , H02H1/00 , H01H83/22 , G01R31/50 , G11C7/06 , H03F3/45 , H02H3/16 , H01H83/20 , H01H83/14 , H02H3/10 , H02H3/08 , H02H3/33
摘要： The line power and neutral conductors for a circuit interrupter such as a miniature circuit breaker, using ground fault sensing via a current transformer, are arranged as a rigid conductor formed from a flat plate and surrounding and holding an insulated flexible conductor when passing through the Ground Fault Interrupter current transformer. The rigid conductor can provide a shaped current path to maximize the effectiveness of the current transformer.
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公开(公告)号：US10797479B2
公开(公告)日：2020-10-06
申请号：US15439438
申请日：2017-02-22
申请人： ABB Schweiz AG
发明人： Shawn Alan Morgan , Lathom Alexander Louco , Jeffrey Marcel Kubascik , Lucas Ray Mallory , Craig Benjamin Williams
IPC分类号： H02H3/00 , H02H9/08 , H02H1/00 , H02H7/26 , H02H3/28 , H02H3/32 , G01R19/25 , G01R31/50 , H02H3/33 , H02H3/16
摘要： A method of operating an electrical power distribution system including a plurality of circuit protection devices and an additional circuit protection device communicatively coupled by a communications network is described. The method includes transmitting, by each circuit protection device of the plurality of circuit protection devices, an electrical current communication to the communication network, the electrical current communication including an indication of an electrical current detected by the transmitting circuit protection device formatted according to a network communication protocol of the communication network. The additional circuit protection device receives the electrical current communications from the plurality of circuit protection devices and determines, based on the received electrical current communications, whether a ground fault condition exists in the electrical power distribution system.
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公开(公告)号：US10770844B2
公开(公告)日：2020-09-08
申请号：US15808839
申请日：2017-11-09
申请人： Chengli Li
发明人： Shengyun Nie , Chengli Li
IPC分类号： H01R13/713 , H01R13/66 , H02H1/00 , H01R13/58 , H01R13/631 , H01R13/506 , H02H3/16 , H01H83/14 , H01H73/44 , H01H83/04 , H02H3/33 , H01H71/58
摘要： A leakage current protection plug includes a body formed by a top cover and a base, a moving assembly disposed in the body, and output wires. The moving assembly includes a control circuit board, and a detector assembly and a trip assembly disposed on the control circuit board, wherein power input insertion plates and power output moving contact arms are assembled with the moving assembly. Each output moving contact arm is formed integrally and fixed to the detector assembly, and the output ends of the output moving contact arms are directly connected to the output conductor wires. The device has a simple overall structure and can be reliably assembled. By using integrally formed output moving contact arms to directly couple the input and output, it improves the accuracy of the leakage current detection parameters, reduces internal transfers and solder points, and reduces the size and cost of the plug.
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公开(公告)号：US20200235561A1
公开(公告)日：2020-07-23
申请号：US16788816
申请日：2020-02-12
发明人： Andi JAKUPI , Michel LAYOUR , Hynek RAISIGEL , Costin VASILE , Paul A. REID , Gary SCOTT , Joseph BEIERSCHMITT
摘要： An arc fault detection system samples a high frequency signal on a power line sequentially at different frequency regions according to a frequency hopping sequence, which is repeated a number of times over a predefined period. The different frequency regions include at least one region with a carrier for power line communication on the power line and at least one region without a carrier for power line communication on the power line. The system obtains energy measurements for each frequency region based on the sampled signals, computes an energy level for each frequency region based on the measurements for each region, and assigns a binary value to each region according to the corresponding energy level. The binary value represents a presence or absence of signal content in the frequency region. The system determines a presence or absence of an arc fault based on the binary values for the frequency regions.
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公开(公告)号：US10707669B2
公开(公告)日：2020-07-07
申请号：US15607999
申请日：2017-05-30
申请人： EATON CORPORATION
摘要： A circuit interrupter including a line conductor, a neutral conductor, a power supply, a ground fault current transformer structured to sense a ground fault current from current flowing through the line and neutral conductors, a grounded neutral detection circuit including a filtering stage structured to high-pass filter the ground fault current, and a processor structured to receive an output of the grounded neutral detection circuit and to determine whether a grounded neutral is present based on the output of the grounded neutral detection circuit.
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公开(公告)号：US10559434B2
公开(公告)日：2020-02-11
申请号：US15499789
申请日：2017-04-27
申请人： LSIS CO., LTD.
发明人： Jongkug Seon
摘要： A control circuit for an electric leakage circuit breaker, capable of preventing an error in determining an electric leakage generation due to an offset voltage of an input amplifier, including, a zero phase current transformer configured to detect a zero phase current on a circuit as a leakage detection signal, a filter circuit section configured to remove a high frequency noise included in the leakage detection signal, an input amplifier configured to a voltage formed by a current of the leakage detection signal and an impedance of the filter circuit section, and includes a pair of transistors, a base current generator commonly connected to the bases of the pair of transistors and configured to supply the same amount of base current to the pair of transistors, and a trip determination circuit section configured to determine whether to output a trip control signal.
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公开(公告)号：US20200041567A1
公开(公告)日：2020-02-06
申请号：US16458368
申请日：2019-07-01
IPC分类号： G01R31/327 , G01R31/28 , H02H3/33
摘要： Implementations of ground fault circuit interrupter (GFCI) self-test circuits may include: a current transformer coupled to a controller, a silicon controlled rectifier (SCR) test loop coupled to the controller, a ground fault test loop coupled to the controller, and a solenoid coupled to the controller. The SCR test loop may be configured to conduct an SCR self-test during a first half wave portion of a phase and the ground fault test loop may be configured to conduct a ground fault self-test during a second half wave portion of a phase. An SCR may be configured to activate the solenoid to deny power to a load upon one of the SCR self-test or the ground fault self-test being identified as failing.
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