Ground Fault Protection Patents (Class 361/42)
  • Patent number: 11190005
    Abstract: The present disclosure relates to a reverse grounding protection circuit and a ground fault circuit interrupter. The reverse grounding protection circuit may include a power supply circuit, a leakage signal amplifying circuit, a leakage grounding detection circuit, a power supply indicator circuit, a manual detection circuit, a tripping mechanism control circuit, a reverse connection detection and execution circuit, and a power-on driving signal generating circuit. A ground fault circuit interrupter may comprise an interrupter body and a reverse grounding protection circuit in the interrupter body. The practice of the present disclosure may avoid the risk from reverse connection of the ground fault circuit interrupter and output of power of reverse connection, and thus improve safety of the ground fault circuit interrupter.
    Type: Grant
    Filed: December 4, 2018
    Date of Patent: November 30, 2021
    Inventor: Ze Chen
  • Patent number: 11183831
    Abstract: A wiring device including an interrupting device, a fault detection device, and a controller. The interrupting device is configured to place the wiring device in a tripped condition in which the flow of power between one or more line terminals and one or more load terminals is interrupted. The fault detection circuit is configured to detect a fault condition and generate a fault detection signal in response to detecting the fault condition, the fault detection signal being provided to the interrupting device to place the interrupting device in the tripped condition. The controller is configured to monitor a current of the one or more line terminals, identify a presence of an in-rush condition or a steady-state condition, and prevent the output of the fault detection signal upon identifying either the in-rush condition or the steady-state condition.
    Type: Grant
    Filed: July 24, 2019
    Date of Patent: November 23, 2021
    Assignee: Hubbell Incorporated
    Inventor: William Vernon Miller, III
  • Patent number: 11181563
    Abstract: A circuit-breaker includes an electronic trip unit, which initiates an interruption or reduction of the current flow in a low-voltage circuit when current or current-time limits are exceeded in the low-voltage circuit. The electronic trip unit includes at least two processors that independently check whether current or current-time limits are being exceeded. A test signal is fed to the circuit-breaker via a first communication interface, which is fed to one of the two processors during operation so that a test of the circuit-breaker is carried out during operation, while at the same time an active protection is provided with regard to the exceeding of current or current-time limits.
    Type: Grant
    Filed: September 17, 2020
    Date of Patent: November 23, 2021
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Marco Bruell, Christoph Boerzsoenyi, Michael Gerstner, Ilka Jakubowski
  • Patent number: 11183800
    Abstract: An electrical pin and sleeve device is disclosed. The pin and sleeve device incorporating one or more features to facilitate easier assembly and use. For example, the pin and sleeve device may include one or more indicators (e.g., LEDs) mounted on a printed circuit board (PCB) for providing power supply indication, and/or status or fault notification. Additionally, and/or alternatively, the PCB may be adapted and configured to be inserted into one or more slots formed in the contact carrier and/or the body member of the device. Additionally, and/or alternatively, the PCB may receive electrical power via clips coupled to electrical wires or leads, the clips electrically contacting the pins and/or sleeves of the device.
    Type: Grant
    Filed: July 22, 2019
    Date of Patent: November 23, 2021
    Assignee: Leviton Manufacturing Co., Inc.
    Inventors: Michael Mattei, Amit Pai, Robert Cannetti, Gaurav Surana
  • Patent number: 11173796
    Abstract: An electric vehicle charging circuit breaker for charging an electric vehicle with power from a power source. The electric vehicle charging circuit breaker includes a circuit protection unit structured to provide circuit protection between the power source and the electric vehicle, an electric vehicle charging unit structured to control charging of the electric vehicle, a metering unit structured to meter power flowing between the power source and the electric vehicle, and a display unit structured to display information including at least one of metering information and a status of electric vehicle charging.
    Type: Grant
    Filed: March 13, 2020
    Date of Patent: November 16, 2021
    Assignee: EATON INTELLIGENT POWER LIMITED
    Inventors: Kevin Zhong, Tom Xiong, Darron Kirby Lacey, Sophia Zhang, Lily Du
  • Patent number: 11169187
    Abstract: A power distribution system configured as a radial network includes buses having respective voltages, and distribution lines having respective currents. The radial network interconnects the buses with the distribution lines in a tree-like manner. A bus has a link to at least two distribution lines. The bus voltages and distribution line currents are determined by a processing circuitry configured to receive a Branch Matrix (BM) iteratively determine currents for the distribution lines and voltages for each of the buses until a difference is below a predetermined tolerance, and output final bus voltages and final distribution line currents. The circuitry iteratively determines the currents by determining a current matrix (CM) using the BM, and by determining the currents for the plurality of distribution lines in a zig zag manner over the matrix elements in the CM. The system finds a solution using fewer iterations than the backward forward sweep method.
    Type: Grant
    Filed: June 28, 2019
    Date of Patent: November 9, 2021
    Assignee: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS
    Inventors: Mustafa Mohammed J. Al-Khabbaz, Mohammad A. Abido
  • Patent number: 11171474
    Abstract: In some examples, a device includes at least one input node configured to receive a signal indicating a current through a conductor to a load. The device also includes circuitry configured to determine a first magnitude of the received signal in a first frequency range by applying a first bandpass filter to the received signal. The circuitry is also configured to determine a second magnitude of the received signal in a second frequency range by applying a second bandpass filter to the received signal. The processing circuitry is further configured to determine that an electric arc has occurred on the conductor based on the first magnitude and the second magnitude.
    Type: Grant
    Filed: August 27, 2019
    Date of Patent: November 9, 2021
    Assignee: Infineon Technologies AG
    Inventors: Mihai-Alexandru Ionescu, Michael Asam, Louis Janinet, Michael Ruprecht, Redouane Djeghader
  • Patent number: 11159016
    Abstract: An apparatus may determine a parameter related to a voltage value at a midpoint terminal of a system power device, and may adjust a voltage applied to a second terminal of the system power device based on the parameter and a reference value. The second terminal may be different from the midpoint terminal.
    Type: Grant
    Filed: May 7, 2019
    Date of Patent: October 26, 2021
    Assignee: Solaredge Technologies Ltd.
    Inventors: Ilan Yoscovich, Liron Har-Shai, Amir Grossberg, Matan Atias
  • Patent number: 11146058
    Abstract: A method and circuit for determining and extinguishing electrical faults includes a power supply, and electrical load, a controller module, and electrical sensors, and when the controller module does not extinguish the electrical fault, another switch blows a fuse.
    Type: Grant
    Filed: July 12, 2019
    Date of Patent: October 12, 2021
    Assignee: GE Aviation Systems Limited
    Inventors: John Oliver Collins, Russell Mark Compton
  • Patent number: 11131698
    Abstract: A method and a monitoring device for selectively determining a partial system leakage capacitance in an ungrounded power supply system having a main system and at least one partial system. An extended insulation monitoring system is configured for determining an overall system leakage capacitance of the power supply system; an extended insulation fault location system for determining an ohmic and a capacitive partial test-current portion of a partial test current captured in the respective partial system; and an impedance evaluation system for determining a partial insulation resistance and a partial system leakage capacitance for each partial system to be monitored are provided. For preventing the entire ungrounded power supply system from being switched off, the fundamental idea of the present invention is advantageously based on identifying in which partial system a critical increase of a partial system leakage capacitance has taken place.
    Type: Grant
    Filed: September 26, 2018
    Date of Patent: September 28, 2021
    Assignee: BENDER GMBH & CO. KG
    Inventors: Dieter Hackl, Mario Lehr
  • Patent number: 11128213
    Abstract: An inverter circuit of an embodiment includes a plurality of semiconductor switching elements constituting a bridge circuit; a transformer connected to the output end of the bridge circuit; an electric current detector that detects whether an electric current carried through at least one of the switching elements exceeds a predetermined value; a pulse generator circuit that transmits a periodic pulse signal; a flip-flop circuit connected to the detector and the pulse generator circuit; a field effect transistor (FET) turned on or off by a signal from the flip-flop circuit; and a gate signal generator circuit connected to the FET and the bridge circuit. The flip-flop circuit inverts an output signal by a detection signal of the detector and interrupts the output of the bridge circuit. The gate signal generator circuit switches the switching element at the diagonal position of the bridge circuit based on a signal from the FET.
    Type: Grant
    Filed: November 29, 2018
    Date of Patent: September 21, 2021
    Assignees: T & S CORPORATION, FUJIKIN INCORPORATED
    Inventors: Toshiro Sakabe, Toyohiko Aoki, Kiyomi Watanabe, Shin Yokoshima
  • Patent number: 11125820
    Abstract: An apparatus includes a safety fault interrupter circuit. The safety fault interrupter circuit includes a safety fault monitor coupled to a first bias node and configured to selectively assert a fault interrupter signal based at least in part on a first bias voltage and a first power consumption. The safety fault interrupter circuit also includes a power fault monitor for the safety fault monitor, wherein the power fault monitor is coupled to a second bias node and is configured to selectively assert the fault interrupter signal based at least in part on a second bias voltage and a second power consumption that is less than the first power consumption.
    Type: Grant
    Filed: November 13, 2018
    Date of Patent: September 21, 2021
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventor: Robert Mason Hanrahan
  • Patent number: 11125799
    Abstract: Systems are provided to determine a location of an electrical fault in an electrical system of a vehicle. A test apparatus can include a control unit and a plurality of scan circuits. The control unit is configured to electrically couple the plurality of scan circuits to the electrical system and trigger the plurality of scan circuits to pass electrical signals to the electrical system. Each scan circuit is configured to detect a presence of an electrical fault in the electrical system based on an electrical signal passed. Each scan circuit provides information indicative of a location of the electrical fault in the electrical system, when detected, to the control unit.
    Type: Grant
    Filed: December 26, 2019
    Date of Patent: September 21, 2021
    Assignee: Transportation IP Holdings, LLC
    Inventors: Jared Klineman Cooper, David Michael Peltz, Nicholas David Nagrodsky, Samuel William Golden, Jerod Reid Svidunovich, Keith Allen Heob, Michael Copps
  • Patent number: 11128128
    Abstract: The present disclosure relates to a directional over-current ground relay (DOCGR) for performing a protective relay of the power source system such as a micro-grid system using communications between an SV-remote terminal unit (SV-RTU) and the DOCGR, wherein the SV-RTU is configured for measuring voltage and current of the distributed power source system and thus generating a sampled value (SV) signal. Further, the present disclosure relates to a method for operating the DOCGR.
    Type: Grant
    Filed: August 24, 2018
    Date of Patent: September 21, 2021
    Assignee: LSIS CO., LTD.
    Inventor: Su-Hyeong Jang
  • Patent number: 11112453
    Abstract: A process for self testing a fault circuit includes disabling an actuator, performing a self-test by creating a simulated fault signal across at least a portion of a half cycle of a first polarity and across at least a portion of a half cycle of a second polarity, and determining whether the self-test was successful.
    Type: Grant
    Filed: May 15, 2020
    Date of Patent: September 7, 2021
    Assignee: Leviton Manufacturing Company, Inc.
    Inventors: Michael Ostrovsky, Adam Kevelos
  • Patent number: 11114430
    Abstract: A leakage current detection and protection device coupled between input and output ends of power lines, and includes first and second switching modules, a leakage current detection module, a self-test module, and first and second drive modules. When the leakage current detection module detects a leakage current on the power lines, the second drive module controls the second switching module to disconnect power to the output end. When the self-test module detects a fault in the leakage current detection module, the first drive module controls the first switching module to disconnect the power to the output ends. The first switching module is coupled between the input end and a point where the leakage current detection module, the self-test module, and the first and second drive modules are coupled, so that these modules are de-powered when the first switching module disconnects the electrical connection to output ends.
    Type: Grant
    Filed: October 31, 2019
    Date of Patent: September 7, 2021
    Inventor: Chengli Li
  • Patent number: 11112465
    Abstract: Methods and apparatus for monitoring the integrity of an insulative material. A monitoring module detects a leakage current corresponding to an injection signal into the insulative material by a signal source. An output can provide an insulation fault signal when the leakage current is greater than a given threshold.
    Type: Grant
    Filed: February 5, 2019
    Date of Patent: September 7, 2021
    Assignee: Allegro Microsystems, LLC
    Inventor: Robert A. Briano
  • Patent number: 11105864
    Abstract: An arc fault circuit interrupter is disclosed. This arc fault circuit interrupter can include any one or more of three different sensors such as a high frequency sensor, and any one of lower frequency sensors such as a current sensor or a differential sensor. The arc fault circuit interrupter can be configured as an in line arc fault circuit interrupter installed in a wall box. In addition, the arc fault circuit interrupter can include a processor configured to determine any one of a series arc fault, or a parallel arc fault.
    Type: Grant
    Filed: July 29, 2019
    Date of Patent: August 31, 2021
    Assignee: Leviton Manufacturing Co., Inc.
    Inventors: Michael Ostrovsky, John Libretto, Ronald Jansen, Michael Kamor, Adam Kevelos
  • Patent number: 11099239
    Abstract: A measuring device includes: a sensor arrangement; and an insulating support for use in an electric switching device. The sensor arrangement includes at least a sensor for measuring at least one of a current strength and a voltage of an electric current flowing through an electric path. The insulating support includes a sleeve comprised of electrically insulating material, the sleeve enclosing a space enclosing the electric path. The sensor arrangement is arranged on an outer side of the sleeve.
    Type: Grant
    Filed: November 22, 2018
    Date of Patent: August 24, 2021
    Assignee: EATON INTELLIGENT POWER LIMITED
    Inventors: Bogdan Zabrocki, Sabine Firmenich, Josef Knopp, Ralph Kriechel
  • Patent number: 11101641
    Abstract: Fault protection devices for electrical distribution systems and related reclosing methods are provided. One exemplary method of reclosing a switching element of a fault protection device after fault detection involves pulsing the switching element closed to enable a temporary current flow through the fault protection device and verifying absence of a fault condition based at least in part on the temporary current flow using a testing fault detection threshold. After verifying the absence of the fault condition, the method closes the switching element to enable current flow through the fault protection device, monitors the current flow through the fault protection device for the fault condition using the testing fault detection threshold for a transition period, and monitors the current flow through the fault protection device for the fault condition using a different fault detection threshold after the transition period.
    Type: Grant
    Filed: September 6, 2019
    Date of Patent: August 24, 2021
    Assignee: S&C Electric Company
    Inventors: Michael John Meisinger, David Francis Klein
  • Patent number: 11088528
    Abstract: An arc detection circuit that detects an arc that occurs in a transmission path that transmits power from a power supply apparatus to a power conditioner, the arc detection circuit includes: a current detector that detects a current flowing through the transmission path; a storage unit configured to store a base characteristic which is a frequency characteristic of the current flowing through the transmission path when the arc is not present; and an arc determination unit configured to determine whether the arc has occurred based on a result of a comparison between the base characteristic and a detection characteristic which is a frequency characteristic of the current detected by the current detector.
    Type: Grant
    Filed: January 31, 2018
    Date of Patent: August 10, 2021
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventor: Tatsuo Koga
  • Patent number: 11079421
    Abstract: A control module for a lighting fixture may include an input circuit (e.g., a wireless communication circuit) that may be susceptible to noise generating by a noise-generating source (e.g., a lighting control device in the lighting fixture). The control circuit may execute a self-test procedure to determine if the magnitude of the noise is acceptable or unacceptable for normal operation of the control module. During the self-test procedure, the control circuit may measure a noise level at a connection of the input circuit and determine if the noise level causes the self-test procedure to fail. The control circuit may control the lighting load to multiple intensities, measure noise levels of the output signal at each intensity, and process the noise levels to determine if the test has passed or failed. The control circuit may illuminate a visual indicator to provide an indication that the self-test procedure has failed.
    Type: Grant
    Filed: February 8, 2019
    Date of Patent: August 3, 2021
    Assignee: Lutron Technology Company LLC
    Inventors: Richard S. Camden, Jordan H. Crafts, Vidur Garg, Kevin L. Gascho, Alexander F. Mosolgo, Dragan Veskovic, Sean R. Pearson
  • Patent number: 11081877
    Abstract: A power distribution system comprises a first power distribution unit coupled to an electrical power source and a second lower power distribution unit serially coupled to the first distribution unit and configured to supply to power to one or more loads. The first and second distribution units each comprise at least one solid state power controller configured to control current flow through the respective first and second distribution units. The first distribution unit further comprises control means configured to receive and analyze data related to measurements of downstream current and to interrupt the power within the first distribution unit when the received current measurements exceed a predetermined threshold. The system further includes a current monitoring component configured to measure the current flow to, or within, the second distribution unit, the current monitoring component configured to transmit current data to the control means within the first distribution unit for analysis.
    Type: Grant
    Filed: October 4, 2016
    Date of Patent: August 3, 2021
    Inventor: David Allen Elliott
  • Patent number: 11061078
    Abstract: A method that tests a differential protection device having a first and a second differential protection chain includes: a step of controlling the flow of a test signal for a duration smaller than a no-trip time, and steps of determining the state of the two differential protection chains after the flow of a test signal, of monitoring the conformity of the evolution of the protection chains, and of determining the state of the test. The differential protection device includes two differential protection chains and controls the flow of a test current for a duration smaller than a no-trip time. It includes modules for monitoring the evolution of the protection chains and determining the state of the test in order to control the opening of an electrical unit if the test is good. The device can be included in the electrical unit.
    Type: Grant
    Filed: November 14, 2018
    Date of Patent: July 13, 2021
    Assignee: Schneider Electric Industries SAS
    Inventors: Jean-Baptiste Bernard, Francois Vincent, Simon Tian, Jerome Meunier-Carus
  • Patent number: 11063419
    Abstract: A cool running ground fault circuit interrupter (GFCI) with radio frequency (RF) noise suppression and a Capacitive Power Supply tbr interrupting the flow of current through a pair of load and neutral lines extending between an input power source and a load is provided. The GFCI includes a pair of switches disposed between the input power source and the load. The switches are actuated by a relay circuit initially powered by a booster circuit and a constant on power supply. A capacitive power supply for cool operation of the GFCI is connected to the load line via a current limiting resistor and provides power to the constant on power supply circuit.
    Type: Grant
    Filed: June 14, 2018
    Date of Patent: July 13, 2021
    Assignee: Tower Manufacturing Corporation
    Inventor: Victor V Aromin
  • Patent number: 11051984
    Abstract: A ventilation unit and controller device comprises a ventilation unit with a housing. The housing has an intake port permitting flow of gas into the housing and an exhaust port permitting flow of gas out of the housing. Within the housing, a motorized fan is positioned to direct gas into the housing via the intake port and out of the housing via the exhaust port. A controller capable of controlling the ventilation unit communicates with a sensor capable of detecting an environmental stimulus. A source of electric current provides power to the ventilation unit and controller device. The device further comprises a switch capable of interrupting the electric current that powers the device. The device is capable of being removably attached via fasteners to an arc flash hood, and the arc flash hood comprises a ventilation opening to permit gas discharged by the device to enter the arc flash hood.
    Type: Grant
    Filed: October 11, 2017
    Date of Patent: July 6, 2021
    Inventor: Jacob R. Weidert
  • Patent number: 11037707
    Abstract: A system and method for an LCDI power cord and associated circuits is provided. The system and method include energizing shielded neutral wires and shielded line wires and monitoring the energized shields for surges, e.g., arcing, detected by a Leakage Current Detection Circuit (LCDC) and/or voltage drops, e.g., shield breaks, detected by a Shield Integrity Circuit (SIC).
    Type: Grant
    Filed: December 31, 2020
    Date of Patent: June 15, 2021
    Assignee: Tower Manufacturing Corporation
    Inventors: Victor V Aromin, Louis Jay Shatkin
  • Patent number: 11018490
    Abstract: A fault interrupt module includes a detector circuit, a counter circuit, and a switch circuit. The detector circuit is configured to detect faults as a difference in current between an input power line and a neutral line. The counter circuit configured to increment a fault count each time a fault is detected by the detector circuit, and the switch circuit is configured to terminate power to a load upon the fault count reaching a threshold count within a threshold time period.
    Type: Grant
    Filed: January 14, 2019
    Date of Patent: May 25, 2021
    Assignee: Goodrich Corporation
    Inventor: Jon Shearer
  • Patent number: 11005258
    Abstract: An electrical equipment includes a first load configured for a nominal use of the equipment, at least one first metal screen, a sensor configured to measure a quantity characteristic of the first load, and a power supply conductor, wherein the first load and the at least first metal screen are linked electrically to the power supply conductor, and in that the equipment also comprises a comparator configured to compare measurements from the sensor to detect a dormant failure of the at least first metal screen.
    Type: Grant
    Filed: November 6, 2019
    Date of Patent: May 11, 2021
    Assignee: THALES
    Inventors: Mathieu Mairie, Rémy Biaujaud, Prithu Mariadassou
  • Patent number: 10998765
    Abstract: Methods and systems are presented for configuring a rectifier across a secondary side of a current transformer; configuring circuitry to harvest energy across one or more loads coupled across an output of the rectifier selectively in response to an indication that a variable line current at a primary side of the current transformer is small enough; configuring circuitry to shunt at least a first load of the one or more loads coupled across the output of the rectifier selectively in response to an indication that a line current at the primary side is large enough; and configuring circuitry to harvest energy across the first load of the one or more loads coupled across the output of the rectifier again selectively in response to an indication that a line current at the primary side is again small enough.
    Type: Grant
    Filed: March 1, 2018
    Date of Patent: May 4, 2021
    Assignee: Awesense Inc.
    Inventor: Bernard Coquinco
  • Patent number: 10998716
    Abstract: Various embodiments of the present invention are directed to a first trip unit that is configured to be coupled to a power distribution system arranged in a Zone Selective Interlocking (ZSI) arrangement. The first trip unit includes an Input/Output circuit including a ZSI input terminal and a ZSI output terminal, a heartbeat signaling module configured to transmit a second signal to a second trip unit in a lower-level zone than the first trip unit, responsive to the normal condition, a first monitoring module configured to monitor a first signal received by the first trip from a third trip unit in a higher-level zone, responsive to the normal condition, and a second monitoring module configured to detect the fault condition. Related systems, devices, and methods are also described.
    Type: Grant
    Filed: May 22, 2019
    Date of Patent: May 4, 2021
    Assignee: EATON INTELLIGENT POWER LIMITED
    Inventors: Zhi Gao, Daniel A. Hosko, Randy P. Shvach, James Leo Lagree, Paul Richard Rakus, Ronald Dale Hartzel
  • Patent number: 10991534
    Abstract: A leakage protector comprises a housing, a rotating member, a MCU (Microprogrammed Control Unit), an electromagnet, and a leakage protection module. The rotating member, the MCU, the electromagnet and the leakage protection module are all disposed in the housing. The housing is provided with an input terminal and an output terminal. The MCU is configured to perform power supply through the input terminal. The leakage protector has a compact structure while reducing the cost, and effectively reduces the occupied space.
    Type: Grant
    Filed: February 25, 2020
    Date of Patent: April 27, 2021
    Assignee: Dongguan City Tuocheng Industries Co., Ltd.
    Inventors: Juntuo Yang, Siwei Zhu
  • Patent number: 10985693
    Abstract: In an arc detector, a frequency analyzer analyzes frequency components of a current subject to detection in a first frequency band. A detector detects an occurrence of an arc by referring to the frequency components in the first frequency band. When the detector does not detect the occurrence of an arc by referring to the frequency components in the first frequency band, the frequency analyzer analyzes frequency components of the current subject to detection in a second frequency band lower than the first frequency band, and the detector detects the occurrence of an arc by referring to the frequency components in the second frequency band.
    Type: Grant
    Filed: December 7, 2017
    Date of Patent: April 20, 2021
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Atsushi Okita, Tatsuo Koga
  • Patent number: 10985548
    Abstract: Circuit interrupter positioned between supply circuit and load circuit includes fault detection circuit that senses wave forms to the load circuit, fault processing circuit that detects presence of fault and generates fault output signal when fault detected, and control circuit switch connected to fault processing signal output, wherein control circuit switch is opened by presence of fault output signal, thus isolating load circuit from supply circuit. Preferably fault processing circuit and control circuit are optically linked, such that when fault is detected, control circuit switch is opened by optical fault output signal, thus isolating load circuit from the supply circuit. Circuit interrupter may couple another circuit interrupter via power distribution control unit, optionally manageable remotely via automated control interface.
    Type: Grant
    Filed: October 1, 2018
    Date of Patent: April 20, 2021
    Assignee: Intelesol, LLC
    Inventor: Mark Telefus
  • Patent number: 10983174
    Abstract: An excitation unit applies, to an excitation coil, an excitation voltage with a voltage level alternately changing between a first high voltage value higher than a reference voltage value and a first low voltage value lower than the reference voltage value. The excitation unit includes a comparison circuit and a voltage switching circuit. The comparison circuit outputs a comparison signal having a voltage level switching between a high level and a low level depending on whether a detection voltage is greater than, or equal to or less than, a threshold voltage. The voltage switching circuit switches the voltage level of the excitation voltage between the first high voltage value and the first low voltage value according to the voltage level of the comparison signal.
    Type: Grant
    Filed: November 16, 2017
    Date of Patent: April 20, 2021
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Tsuyoshi Ikushima, Naoki Fukuo, Tomokazu Nishigaki
  • Patent number: 10962582
    Abstract: A ground fault locating method for a power distribution network includes: monitoring each phase line of three phase distribution lines, and in the event of occurrence of waves with fault features, performing wave recording to obtain phase line record files; combining the record files corresponding to each of the three phase lines to obtain fault record files; and synthesizing the fault record files to form a transient record file, determining a fault location according to a wave having a maximum change in wave amplitude between two points in the transient record file, and displaying the fault location in a wiring diagram. The ground fault locating method for a power distribution network can significantly improve accuracy of single-phase ground fault detection.
    Type: Grant
    Filed: July 17, 2017
    Date of Patent: March 30, 2021
    Assignees: BEIJING GUODIAN TONG NETWORK TECHNOLOGY CO., LTD, STATE GRID JIBEI ELECTRIC POWER CO., LTD, STATE GRID QINHUANGDAO POWER SUPPLY COMPANY
    Inventors: Xinling Wu, Shen Liu, Tiejun Zhao, Yue Yu, Weiyue Zhou, Chuanbo Tian, Ke Qiao, Xiaoling Zhu, Yaxin Liu, Dong Liang, Aimei Yan, Shuhan Zhang, Lili Zhang, Yi Yuan, Xuemei Wu, Jian Zhu, Lingchen Sun, Sining Wang, Man Leng
  • Patent number: 10934729
    Abstract: A spa cover and sensor are disclosed. The spa cover may include a rigid portion and a floating portion connected to the rigid portion to reduce heat loss. A sensor may be provided within the spa cover, the spa tub, or a combination of the cover and tub to determine when a cover is in an open or closed position over the spa tub. A processor may communicate with other automated features of the spa and/or cover, such as, causing air bladders in the cover to automatically inflate when the cover is in a closed position or locking or unlocking the spa cover. The processor may communicate with features on the spa, such as initiating custom start settings when the cover is removed from the spa tub, or initiate energy saving functions with the cover is placed over the spa tub.
    Type: Grant
    Filed: February 27, 2019
    Date of Patent: March 2, 2021
    Assignee: Bullfrog International, LC
    Inventors: Jeff Guilfoyle, Dan Sjoblom, Eric Hales
  • Patent number: 10916929
    Abstract: A circuit breaker, for interrupting an electrical circuit including electrical conductors, includes an energy converter, a primary side being formed by a conductor and a secondary side being connected to a power supply; a sensor for determining the level of the electric current of an electrical conductor; and a controller, connected to the power supply and the sensor, to cause an interruption of the electrical circuit when current limit values or current/time period limit values are exceeded. The secondary side of the energy converter is connected to the input of a measurement circuit, the output of the energy converter being connected to the controller. The measurement circuit determines an amount of energy and delivers this to the controller, the controller comparing the amount of energy with the level of the current determined by the sensor and emitting a warning signal when a first threshold value is exceeded.
    Type: Grant
    Filed: August 22, 2018
    Date of Patent: February 9, 2021
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Peter Kopaczewski, Andre Borgwardt
  • Patent number: 10914779
    Abstract: A detection method and system are provided to detect an arc fault signal in a (HF) high frequency signal monitored on a power line. The HF signal is monitored on the power line over a predefined time period such as a half-cycle of a base frequency, and is partitioned into a plurality of smaller time-segmented signal segments over the period. For each signal segment, a first filter is applied to a signal spectrum of the signal segment to produce a filtered signal spectrum having one or more frequency intervals associated with power line communication filtered from the signal spectrum. HF signal content is checked in the filtered signal spectrum, and a binary value is assigned to the signal segment based upon a presence or absence of HF signal content. Thereafter, an arc fault event is determined based on the accumulated binary values of the signal segments.
    Type: Grant
    Filed: May 7, 2018
    Date of Patent: February 9, 2021
    Assignee: Schneider Electric USA, Inc.
    Inventor: Andi Jakupi
  • Patent number: 10910992
    Abstract: A photovoltaic installation comprising at least one photovoltaic module (1) and an electromechanical unit capable of producing a non-stray electric arc of a duration less than or equal to a given arc-quenching duration (x) when contacts of the electromechanical unit are opened.
    Type: Grant
    Filed: December 1, 2016
    Date of Patent: February 2, 2021
    Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
    Inventors: Nicolas Chaintreuil, Stéphane Siat
  • Patent number: 10910825
    Abstract: A system for an electrical power distribution network includes an electrical apparatus configured to monitor or control one or more aspects of the electrical power distribution network, the electrical apparatus including a contact switch configured to open and close. The system also includes an input apparatus. The input apparatus includes an impedance module; and an input interface electrically connected to the impedance module and to the contact switch of the electrical apparatus. The input interface is configured to have one of a plurality of input impedances, the plurality of input impedances include at least a first input impedance and a second input impedance that is lower than the first input impedance, and the input interface has the second input impedance when the contact switch of the electrical apparatus is open. The input apparatus may include a plurality of leakage current detection modules.
    Type: Grant
    Filed: March 19, 2019
    Date of Patent: February 2, 2021
    Assignee: Eaton Intelligent Power Limited
    Inventors: Timothy Mark Kromrey, Hani Emil Al-Yousef
  • Patent number: 10908217
    Abstract: A verification device for verifying an electrical overvoltage between two electrical conductors includes a conductor-track carrier made of an electrically insulating carrier material, a plurality of conductor tracks applied in spaced-apart relation from one another on the conductor-track carrier, and a measuring device acquiring an electrical resistance of one of the conductor tracks. Each of the two electrical conductors is electrically connected to at least one of the conductor tracks with the proviso that none of the conductor tracks is electrically connected to both of the two electrical conductors. The conductor tracks are configured such that a prespecified overvoltage between the two electrical conductors causes a partial discharge that changes the electrical resistance of the one conductor track between the one conductor track and another one of the conductor tracks that is electrically connected to one of the two electrical conductors.
    Type: Grant
    Filed: December 28, 2018
    Date of Patent: February 2, 2021
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Janis Heller, Tobias Katzenberger, Bastian Plochmann
  • Patent number: 10903640
    Abstract: An electrical link includes an electrical protection device. The electrical link, for linking an AC high-voltage generator to a user apparatus, includes an electrical conductor surrounded by a first inner insulating envelope. An electrical protection device includes a conductive sheath around the inner insulating envelope. A fixed DC current generator is connected to a current injection point of the conductive sheath. A circuit breaker that can be activated is on the electrical conductor and configured to break the electrical link when it is activated. A detection module is connected to a current tap-off point of the conductive sheath and to the circuit breaker, the detection module being configured to detect a break in the conductive sheath, a current leak out of the electrical conductor or a current leak out of the sheath and to activate the circuit breaker.
    Type: Grant
    Filed: November 9, 2018
    Date of Patent: January 26, 2021
    Assignee: Airbus Operations (S.A.S.)
    Inventor: Patrick Oms
  • Patent number: 10877105
    Abstract: A Testguard circuit with auto-monitoring and end-of-life circuitry is provided. The Testguard circuit interrupts the flow of current through a pair of lines, wherein one of the pair of lines extends between a line input and a line output and the other line extends between a neutral input and a neutral output. The Testguard circuit includes a monitoring module for detecting an end of life condition. The monitoring module includes a simulated ground fault generator for simulating a ground fault; an auto-monitoring logic module; a relay synchronized switch; and an end-of-life switch for disabling the Testguard circuit if certain Testguard component failures are detected.
    Type: Grant
    Filed: June 23, 2020
    Date of Patent: December 29, 2020
    Assignee: TOWER MANUFACTURING CORPORATION
    Inventors: Victor V Aromin, Louis J. Shatkin
  • Patent number: 10872511
    Abstract: Disclosed is an intelligent space safety monitoring system, including: a management server for storing and outputting data, a state sensing unit disposed in a sensing space to be sensed and for transmitting a sensing value having sensed a normal state or an abnormal state within the sensing space to the management server, a sensing space photographing unit for transmitting a first screen having photographed the sensing space of the normal state as a case where the sensing value sensed by the state sensing unit is smaller than a setting value and a second screen having photographed the sensing space of the abnormal state as a case where the sensing value sensed by the state sensing unit is the setting value or more to the management server, and an abnormal state determining unit for determining the sensing space as a risk state.
    Type: Grant
    Filed: August 8, 2019
    Date of Patent: December 22, 2020
    Assignee: FS, Inc.
    Inventors: Young Jin Kim, Ki Ryung Kwon
  • Patent number: 10855068
    Abstract: 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.
    Type: Grant
    Filed: June 5, 2018
    Date of Patent: December 1, 2020
    Inventors: Paul Violo, George De Francesca
  • Patent number: 10845427
    Abstract: A method for detecting earth-fault conditions in a power conversion apparatus including the following steps: acquiring a first detection signal indicative of an earth-leakage current flowing between the power conversion apparatus and the ground; processing the first detection signal to calculate a first processing signal indicative of a time variant component of the earth-leakage current for one or more selected frequency bands of interest; processing the first detection signal to calculate a second processing signal indicative of a time-invariant component of the earth-leakage current; processing the first and second processing signals to calculate a third processing signal indicative of a resistive component of the earth-leakage current; and processing the third processing signal to determine whether earth-fault conditions are present.
    Type: Grant
    Filed: January 8, 2019
    Date of Patent: November 24, 2020
    Assignee: ABB Schweiz AG
    Inventors: Silvio Scaletti, Alessandro Guerriero, Matteo Gargiulo
  • Patent number: 10840698
    Abstract: A power cord leakage current detection and protection device, including: a switch unit controlling an electrical connection between input and output ends of the device, a switch drive module, and a leakage current detection circuit which includes a leakage current detection line for detecting a leakage current on a power supply line. The switch drive module includes a semiconductor device assembly, and a solenoid assembly coupled between a power supply line and the semiconductor device assembly. The solenoid assembly includes multiple coils with their current paths coupled in parallel; the semiconductor device assembly includes multiple semiconductor devices with their current paths coupled in parallel. When at least one coil is not an open-circuit and at least one semiconductor device is not an open-circuit, the switch drive module controls the switch unit based on a leakage current signal detected by the leakage current detection circuit to disconnect the power supply.
    Type: Grant
    Filed: December 6, 2018
    Date of Patent: November 17, 2020
    Inventor: Chengli Li
  • Patent number: 10840779
    Abstract: A drive device for a motor vehicle includes at least one electric machine and at least one shaft, which shaft is rotatably mounted on a housing element of the drive device and can be driven by the electric machine. At least one discharge ring is provided by which the shaft is brought into electrical contact with the housing element in order to dissipate electrical charges from the shaft to the housing element via the discharge ring. The discharge ring is formed from an electrically conductive fluid.
    Type: Grant
    Filed: January 23, 2019
    Date of Patent: November 17, 2020
    Assignee: Bayerische Motoren Werke Aktiengesellschaft
    Inventors: Martin Reuter, Alfred Grom
  • Patent number: 10840694
    Abstract: A water and flame barrier button assembly is incorporated into an electrical enclosure such as a GFCI housing to provide water and flame resistant set and reset buttons. The buttons are contained within flexible sealing frames that allow one end of the buttons to extend through the top portion of the GFCI housing while the opposite end of the button is exposed within the base portion of the sealing frame. The base portion of the sealing frame attaches to the interior of the housing with the exposed button end positioned inward of the sealing frame base. The base of the sealing frame contacts the GFCI circuit board while providing a rebound force to return either the set or reset button exposed end from a position depressed and in contact with the circuit board to a position not in contact with the circuit board and returning inward of the sealing frame base.
    Type: Grant
    Filed: July 15, 2019
    Date of Patent: November 17, 2020
    Assignee: Tower Manufacturing Corp.
    Inventors: Victor V Aromin, Louis Jay Shatkin