Ground Fault Protection Patents (Class 361/42)
  • 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: 10840048
    Abstract: A protection module is for a modular ground fault protective relay. The modular ground fault protective relay includes a power supply module having a connection port. The protection module includes a body having a first side and a second side disposed opposite the first side, a module connector extending outwardly from the first side, the module connector being structured to be removably coupled to the connection port of the power supply module, and a module expansion port extending inwardly from the second side toward the first side.
    Type: Grant
    Filed: March 13, 2017
    Date of Patent: November 17, 2020
    Assignee: EATON INTELLIGENT POWER LIMITED
    Inventors: Jason Easton, Paul Seff, Jeffery Kuykendall, Michel Rivas
  • 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: 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: 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
  • Patent number: 10829066
    Abstract: An electrical system can include a power supply configured to provide electrical power to components at a time at which the electrical system experiences an electrical fault. The electrical system can include a first battery electrically coupled in parallel to a second battery via an electrical bus, whereby the first and second batteries can provide electrical power to a first electrical load and a second electrical load. Upon experiencing a fault, a first circuit element can electrically decouple the first battery and the second battery by opening a circuit provided by the electrical bus, thereby isolating the first battery from the second battery. Next, the battery experiencing the fault can include a second circuit element that can electrically decouple the battery experiencing the fault from a respective electrical load, while the battery isolated from the fault can continue to provide electrical power to components.
    Type: Grant
    Filed: September 22, 2017
    Date of Patent: November 10, 2020
    Assignee: Zoox, Inc.
    Inventors: Moritz Boecker, Bryan Booth, Kyle Matthew Foley, Robert Ng, Timothy David Kentley-Klay
  • Patent number: 10819275
    Abstract: A device, system, and method is disclosed for improving safety of a power system. For example, a differential current may be detected using at least one sensor by temporarily enabling sampling of current flowing through one or more conductors. Additionally, current flow may be temporarily altered in order to sample current in a system. The measurements may be handled locally and/or remotely and appropriate actions may be taken to enhance the overall safety of the system.
    Type: Grant
    Filed: October 13, 2016
    Date of Patent: October 27, 2020
    Assignee: Solaredge Technologies Ltd.
    Inventors: Tzachi Glovinsky, Ilan Yoscovich
  • Patent number: 10816609
    Abstract: A vehicle power system includes an inverter, outlets, and circuit breakers. The inverter supplies power to the outlets through the circuit breakers. The inverter, in response to detecting no voltage at designated amount and combination of the outlets, based on the designated amount and combination, generates a signal indicating that one or more of electrical paths to the outlets has failed or one or more of the circuit breakers is open.
    Type: Grant
    Filed: August 6, 2018
    Date of Patent: October 27, 2020
    Assignee: Ford Global Technologies, LLC
    Inventors: Heinrich Enslin, Jeffery R. Grimes
  • Patent number: 10819104
    Abstract: A method for a power system having a string of a plurality of power sources connected across a power device includes connecting a plurality of safe voltage units having safety switches connected respectively across each of the power sources. The method includes sensing a plurality of parameters of the power sources, and monitoring for a signal transmitted from the power device. Each of the safety switches is activated to be OFF responsive to detecting the signal within a predetermined time period. Upon not detecting the signal from the power device within the predetermined time period, a safe mode of operation of the power system is entered in which the voltages of each of the power sources is reduced to a voltage level less than a predetermined voltage level by turning the safety switches ON.
    Type: Grant
    Filed: August 17, 2018
    Date of Patent: October 27, 2020
    Assignee: Solaredge Technologies Ltd.
    Inventors: David Braginsky, Ilan Yoscovich, Tzachi Glovinsky
  • Patent number: 10809733
    Abstract: Presented are intelligent vehicle systems and control logic for driver coaching and on-demand vehicle charging, methods for making/using such systems, and motor vehicles with real-time eco-routing and automated driving capabilities.
    Type: Grant
    Filed: October 16, 2018
    Date of Patent: October 20, 2020
    Assignee: GM Global Technology Operations LLC
    Inventors: Todd P. Lindemann, Bryce J. Benfield, John M. Clarahan, Robert Stacey, Freddy V. Rayes, Kunaal Verma, Allan K. Lewis, Apral S. Hara
  • Patent number: 10802083
    Abstract: In at least one embodiment, provided is an electric vehicle supply equipment having a line power contactor including a first line power input and a second line power input and a first line power output and a second line power output. It further has a welded contactor detector with a contactor sense circuit, the sense circuit having a first line shunt resistor network connected from the first line power contactor output to ground and a second line shunt resistor network connected from the first line power contactor output to ground. In another embodiment provided is an EVSE including a welded contactor detector with a contactor sense circuit having a bias resistor connected between the hot line relay input and the neutral line relay output.
    Type: Grant
    Filed: May 24, 2013
    Date of Patent: October 13, 2020
    Assignee: Webasto Charging Systems, Inc.
    Inventors: Scott Garret Berman, Albert Flack, Keith Kolb, Ming Bai
  • Patent number: 10794947
    Abstract: A ground loss detection circuit identifies a faulty ground connection in a vehicle electrical system including a pair of redundant ground lines connected between a vehicle battery/chassis ground and an electronic control unit (ECU). In particular, a first ground line is connected between the battery/chassis ground and a first ECU ground connection, while a second ground line is connected between the battery/chassis ground location and a second ECU ground connection. The ECU includes a common ground associated with selected electronic components included in the ECU. A first shunt component is connected between the first ECU ground connection and the common ground, and a second shunt component is connected between the second ECU ground connection and the common ground. The currents through the first and second shunt components are monitored to identify a current imbalance to detect a faulty ground connection in one of the first and second ground lines.
    Type: Grant
    Filed: July 8, 2016
    Date of Patent: October 6, 2020
    Assignees: ZF Active Safety US Inc., ZF Active Safety GmbH, ZF Automotive Germany GmbH
    Inventors: Antonio Romero, Johannes Orth, Erik Hermann, William J. Lindeman
  • Patent number: 10794963
    Abstract: In described examples, a time-domain analyzer is arranged to generate an indication of a number of high-frequency events of an electrical monitor signal that includes a fundamental periodic frequency. The high-frequency events include frequencies higher than the fundamental periodic frequency. A frequency-domain analyzer is arranged to generate frequency band information in response to frequencies of the electrical monitor signal that are higher than the fundamental periodic frequency. A fault detector is arranged to monitor the indication of the number of high-frequency events and the generated frequency band information, and to generate a fault flag in response to the monitored indication of the number of high-frequency events and the generated frequency band information.
    Type: Grant
    Filed: January 15, 2020
    Date of Patent: October 6, 2020
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Prasanna U. Rajagopal, Kallikuppa M Sreenivasa, Amit G Kumbasi
  • Patent number: 10770843
    Abstract: A wall mounted power supply receptacle device includes a body, a core disposed inside the body, and an insertion plate assembly. The body includes a upper body portion and a base connected to each other. The core includes a first circuit board assembly and a second circuit board assembly. The first circuit board assembly is accommodated inside the base and potted with a high thermal conductivity material. The insertion plate assembly includes insertion plates and wiring terminals and is mounted via a middle support frame above the first circuit board assembly. The second circuit board assembly is mounted via a grounding frame above the middle support frame. The grounding frame includes a U shaped notch that drops toward the base to accommodate the second circuit board assembly. The second circuit board assembly is electrically coupled to the first circuit board assembly through the wiring holes of the grounding frame.
    Type: Grant
    Filed: April 22, 2019
    Date of Patent: September 8, 2020
    Inventor: Long Zhang
  • Patent number: 10763659
    Abstract: A power contact fault clearing device includes a first pair of terminals adapted to be connected across a first set of switchable contacts, and a second pair of terminals adapted to be connected across a second set of switchable contacts. The second set of switchable contacts coupled to an arc suppressor. A current sensor is adapted to be connected between a power load and the second set of switchable contacts. The current sensor is configured to measure a power load current associated with the power load. A controller circuit is operatively coupled to the current sensor and the first and second pairs of terminals. The controller circuit is configured to detect a fault condition based at least on the power load current, and sequence deactivation of the first set of switchable contacts and the second set of switchable contacts based on the detected fault condition.
    Type: Grant
    Filed: January 29, 2020
    Date of Patent: September 1, 2020
    Assignee: Arc Suppression Technologies
    Inventors: Reinhold Henke, Robert Thorbus
  • Patent number: 10754365
    Abstract: An arc detection and intervention system for a solar energy system. One or more arc detectors are strategically located among strings of solar panels. In conjunction with local management units (LMUs), arcs can be isolated and affected panels disconnected from the solar energy system.
    Type: Grant
    Filed: March 23, 2018
    Date of Patent: August 25, 2020
    Assignee: Tigo Energy, Inc.
    Inventors: Daniel Eizips, Shmuel Arditi
  • Patent number: 10744882
    Abstract: A control unit of an electric power transmission apparatus is configured to perform alignment processing in which an electric power transmission unit and an electric power reception unit are aligned with each other and foreign matter sensing processing for sensing whether or not a foreign matter is present between the electric power transmission unit and the electric power reception unit, by using an image shot by a camera. The control unit selects an alignment prioritized mode in which alignment processing is performed in preference to foreign matter sensing processing before start of electric power transmission, and selects a foreign matter sensing prioritized mode in which foreign matter sensing processing is performed in preference to alignment processing during electric power transmission.
    Type: Grant
    Filed: July 9, 2018
    Date of Patent: August 18, 2020
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Toshiya Hashimoto, Takahiro Misawa, Hideo Nagata
  • Patent number: 10746800
    Abstract: A method and test device for testing protection relays, the test device having a signal generator. The signal generator supplies a signal as pulses having pause times, which alternate over time. Signal level is reduced during the pause times and at least one pulse has an amplitude at least higher than one of the preceding pulses. A supply voltage is supplied by an accumulator providing electric energy for generating the pulses. Via the accumulator, a greater mobility and flexibility is ensured, and fuel-fed power units or emergency power units may be omitted. In order to reduce the load (average energy) on the accumulator, the signal generator emits the signal as pulses having pause times. The pulse amplitudes may have an increasing trend to reach a switching threshold. This allows the use of smaller and more compact, which is important for a portable test device.
    Type: Grant
    Filed: October 21, 2016
    Date of Patent: August 18, 2020
    Assignee: OMICRON ELECTRONICS GMBH
    Inventor: Ulrich Klapper
  • Patent number: 10734800
    Abstract: A dangerous, higher-frequency (>1 kHz) earth fault current in an electrical drive system operated in an electrical grid and having a power converter and an electrical drive machine can be prevented by producing a common-mode voltage with a defined common-mode voltage component in the power converter at a selected low frequency (<1 kHz); in the event of an earth fault in the electrical drive system, flowing at the selected low frequency a common-mode current component of a common-mode current through a predominantly ohmic conductor-to-earth impedance on the basis of the defined common-mode voltage component; measuring a total common-mode current in one of several current circuits of the electrical drive system; determining from the total current the common-mode current component; and when the common-mode current component reaches a reference value, disconnecting the electrical drive system from the electrical grid.
    Type: Grant
    Filed: August 17, 2017
    Date of Patent: August 4, 2020
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Hubert Schierling, Benno Weis
  • Patent number: 10707670
    Abstract: Method and system allowing more accurate detection and identification of unwanted arcing include novel processing of signal voltage representing recovered power-line current. In one implementation, arc-faults are detected based on numerical analysis where individual cycles of line voltage and current are observed and data collected during each cycle is processed to estimate likelihood of presence of arc-event within each individual cycle based on pre-defined number of arc-events occurring within pre-defined number of contiguous cycles.
    Type: Grant
    Filed: March 22, 2019
    Date of Patent: July 7, 2020
    Assignee: HUBBELL INCORPORATED
    Inventors: William Vernon Miller, III, Gary Michael Miller
  • Patent number: 10698011
    Abstract: A clip-on ammeter includes a current measurement unit, an evaluation unit and a USB interface. The current measurement unit records current values and provides the current values as measurement values for transfer purposes. The evaluation unit includes an ND converter and is connected to the current measurement unit. The evaluation unit allows the measurement values to be transmitted in a processable form as USB compatible digital data to the USB interface. The USB interface is connected to the evaluation unit and the USB interface allows the USB compatible data to be made available for transfer purposes to be further processed. The evaluation unit is energized via the USB interface. The clip-on ammeter includes a voltage transformer. The voltage transformer provides a stabilized voltage as a reference voltage for the current measurement unit.
    Type: Grant
    Filed: September 2, 2015
    Date of Patent: June 30, 2020
    Assignee: NIDEC driveXpert GmbH
    Inventor: Veit Zoeppig
  • Patent number: 10690526
    Abstract: An apparatus for compensating for a position information error of a resolver includes: a resolver-digital converter configured to generate a corresponding output angle by estimating resolver position information from a resolver output signal; and a position error compensation learner configured to determine a position error component in a corresponding electric angular velocity of the resolver output signal using the resolver output signal and the output angle and to convert the position error component to a position error component in an electric angular velocity 0. The resolver-digital converter compensates for an error by reflecting the position error component in the electric angular velocity 0 in the error between a position angle of the resolver output signal and the output angle.
    Type: Grant
    Filed: February 14, 2015
    Date of Patent: June 23, 2020
    Assignee: Hyundai Motor Company
    Inventors: Joo Young Park, Hyung Bin Ihm, Byung Hoon Yang
  • Patent number: 10693290
    Abstract: An electronic temperature switch, comprises a measurement circuit that measures temperature and generates an temperature signal corresponding to the sensed temperature; an evaluator circuit that receives said temperature signal and compares said temperature signal to a lower threshold value and an upper threshold value, and generates an evaluation signal indicating when said temperature signal is between the lower temperature threshold value and an higher temperature threshold value; and a loading circuit that in response to the evaluator circuit, generates a first pre-set output signal indicating when the temperature signal is between the lower threshold value and the higher threshold value, and a second pre-set output signal when the temperature signal is not between the lower threshold value and the higher threshold value.
    Type: Grant
    Filed: June 8, 2016
    Date of Patent: June 23, 2020
    Assignee: HYDRA-ELECTRIC COMPANY
    Inventor: Robert Andrew Guziak
  • Patent number: 10686311
    Abstract: An AFCI protective system includes a MOV circuit that has a plurality of line terminals comprising at least one phase conductor, a neutral conductor or a ground conductor. A MOV is coupled to a pair of line terminals through a low impedance circuit, and a response circuit configured to activate a human readable indicator when the MOV is experiencing an end of life condition.
    Type: Grant
    Filed: May 2, 2018
    Date of Patent: June 16, 2020
    Assignee: Pass & Seymour, Inc.
    Inventor: Thomas N. Packard
  • Patent number: 10666041
    Abstract: Disclosed herein is a liquid system tool having an integrated residual current device, RCD. The liquid system tool comprises a current circuit having a power input for receiving an alternating electrical current, AC, a rectifier for rectifying the AC into a direct current, DC, a voltage booster for increasing a DC voltage and a motor unit connected to an output of the voltage booster for driving the liquid system tool. The RCD comprises a sensor element connected to an output of the rectifier and an input of the voltage booster and being configured to collect an analog current signal and an analog to digital, A/D, converter configured to convert the analog current signal into a digital current signal.
    Type: Grant
    Filed: October 13, 2017
    Date of Patent: May 26, 2020
    Assignee: Husqvarna AB
    Inventors: Magnus Rosén, Johan Linnér, Johan Berg
  • Patent number: 10658837
    Abstract: Safety power disconnection for remote power distribution in power distribution systems is disclosed. The power distribution system includes one or more power distribution circuits each configured to remotely distribute power from a power source over current carrying power conductors to remote units to provide power for remote unit operations. A remote unit is configured to decouple power from the power conductors thereby disconnecting the load of the remote unit from the power distribution system. A current measurement circuit in the power distribution system measures current flowing on the power conductors and provides a current measurement to the controller circuit. The controller circuit is configured to disconnect the power source from the power conductors for safety reasons in response to detecting a current from the power source in excess of a threshold current level indicating a load.
    Type: Grant
    Filed: November 28, 2018
    Date of Patent: May 19, 2020
    Assignee: Corning Optical Communications LLC
    Inventor: Ami Hazani
  • Patent number: 10658832
    Abstract: The present invention increases noise immunity of an electrical leakage detection circuit. A first comparator COMP1 generates a first comparison signal indicating a comparison result between a voltage corresponding to a detected signal from a zero-phase-sequence current transformer and a predetermined first threshold voltage VTH1. A judgment circuit outputs a judgment signal indicating if there is electrical leakage based on the first comparison signal and outputs a mask signal corresponding to the first comparison signal. A mask circuit generates a latch input signal based on the judgment signal and the mask signal. An output stage comprises a latch circuit which latches a state of the latch input signal when the latch input signal is asserted. The output stage generates a drive signal corresponding to the state of the latch circuit.
    Type: Grant
    Filed: March 29, 2017
    Date of Patent: May 19, 2020
    Assignee: ROHM CO., LTD.
    Inventor: Shinichi Hashimoto
  • Patent number: 10651658
    Abstract: A foreign object detecting device includes first and second coils, the winding directions of which are the same, and a foreign object detecting circuit. The foreign object detecting circuit outputs a first detecting signal having a first predetermined waveform to a first terminal of the first coil and outputs a second detecting signal having a second predetermined waveform, which has the same polarity as the first predetermined waveform, to a third terminal of the second coil to cause magnetic fields generated from the first and second coils to repel each other. The foreign object detecting circuit measures an amount of change of the impedance value of the first or second coil which is caused by the presence of a foreign object. When the amount of change exceeds a predetermined value, the foreign object detecting circuit determines that there is a foreign object above the first or second coil.
    Type: Grant
    Filed: March 11, 2016
    Date of Patent: May 12, 2020
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Atsushi Yamamoto, Hiroshi Kanno
  • Patent number: 10637231
    Abstract: A circuit interrupter including a first electrical conductor, a second electrical conductor, separable contacts, an operating mechanism configured to open and close said separable contacts, a trip circuit configured to trip open said separable contacts, a ground fault detection circuit configured to sense a difference between a current through the first electrical conductor and a current through the second electrical conductor and to output an output signal based on said sensed difference, a power supply, a confirmation circuit structured to input a confirmation signal to the power supply, and a processor configured to receive said direct current power and said output signal. The processor is configured to determine whether a characteristic of said confirmation signal is present in said output signal and to control the trip circuit based on said determination.
    Type: Grant
    Filed: November 30, 2017
    Date of Patent: April 28, 2020
    Assignee: EATON INTELLIGENT POWER LIMITED
    Inventor: Victor Doualla Epee
  • Patent number: 10630069
    Abstract: A solid-state circuit interrupter and arc prevention device (SSI/APD) is disclosed. The SSI/APD is designed to be configured in series with a mechanical circuit breaker and serves to interrupt current flowing through the circuit it is protecting upon a short circuit being detected or if an overload has persisted for an inordinate amount of time. The SSI/APD is capable of detecting and responding to faults in a matter of microseconds and detects and responds to faults on its own, without requiring the mechanical circuit breaker to trip. The mechanical circuit breaker can be optionally tripped after the SSI/APD has opened the circuit. However, the mechanical circuit breaker is tripped only after the SSI/APD has interrupted the circuit, so electrical arcing across the circuit breaker's contacts is avoided. The SSI/APD can also be reset remotely after a fault has been cleared, obviating the need for a person to be present to reset it.
    Type: Grant
    Filed: October 3, 2017
    Date of Patent: April 21, 2020
    Assignee: Atom Power, Inc.
    Inventors: Ryan Kennedy, Denis Kouroussis
  • Patent number: 10627454
    Abstract: The present disclosure discloses a grounding wire detection circuit, for monitoring whether an electrical device is grounded in real time, the grounding wire detection circuit including: a grounding detection circuit and a sampling control circuit, wherein the grounding detection circuit is electrically connected to a live wire, a neutral wire and a grounding wire of a single-phase three-wire type input, the live wire and the neutral wire are electrically connected to a main circuit of the electrical device; and the sampling control circuit is configured to isolate a current detected by the grounding detection circuit and convert the current into a sampling voltage. The real-time monitoring of whether or not a device is grounded may be achieved by detecting the sampling voltage, so as to alarm, cut off electrical device accordingly, which can improve safety of using the electrical device.
    Type: Grant
    Filed: February 8, 2018
    Date of Patent: April 21, 2020
    Assignee: Delta Electronics (Shanghai) CO., LTD
    Inventors: Shiyong Ni, Yinping Yang, Baohua Wang, Dezhi Jiao
  • Patent number: 10614986
    Abstract: A guide member is for an electrical switching apparatus. The electrical switching apparatus includes a primary cover, a secondary cover structured to move between a closed position and an open position, a first printed circuit board, a second printed circuit board spaced from the first printed circuit board, and a cable member electrically connecting the first and second printed circuit boards. The guide member includes a body having a base coupled to the primary cover, a ramp engaging the cable member when the secondary cover is in the closed position, the ramp having first and second opposing end portions, the first end portion extending from the base, and a number of guide portions each extending from the ramp and engaging the cable member when the secondary cover moves between the closed position and the open position in order to minimize twisting and folding of the cable member.
    Type: Grant
    Filed: November 27, 2017
    Date of Patent: April 7, 2020
    Assignee: EATON INTELLIGENT POWER LIMITED
    Inventors: Jack Edward Devine, Brian Scott Caffro, Kelly J. McCarthy, Jason Eric Ochs, Mark A. Janusek
  • Patent number: 10615588
    Abstract: A ground fault circuit interrupter device includes a switch module, a ground fault detection module, a self-testing module and a tripping module. The switch module is coupled between the input and output ends to control the electrical connection between the input and output. The ground fault detection module detects whether a leakage current signal exists at the output end. The self-testing module is coupled to the ground fault detection module and periodically generates a self-test pulse signal which simulates the leakage current signal. The tripping module is coupled to the ground fault detection module and the switch module, to control the movement of the switch module. The device includes at least two tripping drive components, which prevents the device from becoming ineffective when the tripping module malfunctions due to long time use or use under high temperatures. This greatly improves safety of the device.
    Type: Grant
    Filed: November 21, 2017
    Date of Patent: April 7, 2020
    Inventor: Chengli Li
  • Patent number: 10594131
    Abstract: The present disclosure relates to a power supply grounding fault protection circuit. A power supply grounding fault protection circuit may include a power supply circuit, a leakage grounding detection circuit, a signal amplifying and shaping circuit, a microcontroller control circuit, a power supply detection and indicator circuit, a tripping mechanism control circuit, a reverse grounding detection and execution circuit, a wireless network circuit, and an automatic resetting circuit. The practice of the present disclosure may permit a user to reset the grounding fault circuit interrupter remotely after a leaking fault of a circuit is eliminated.
    Type: Grant
    Filed: December 12, 2016
    Date of Patent: March 17, 2020
    Inventor: Ze Chen
  • Patent number: 10589630
    Abstract: A control system for a vehicle includes a controller. The controller is configured to open traction battery contactors based on a potential between high-voltage cables and a chassis continuously exceeding an amplitude threshold for at least a predefined duration of time. The controller is further configured to selectively open the contactors based on data derived from the potential for periods that are each defined by the potential exceeding and then falling below the amplitude threshold without exceeding the predefined duration of time.
    Type: Grant
    Filed: October 13, 2017
    Date of Patent: March 17, 2020
    Assignee: Ford Global Technologies, LLC
    Inventors: Lewei Qian, Duane M. Grider
  • Patent number: 10585135
    Abstract: Embodiments herein relate to a system and method for detecting a degraded isolation impedance in a positively sourced remote load. The system includes a remote load driven by a direct current (DC) source, and a controller operably connected to the remote load having a positive sourcing driver interface with a dedicated return having the DC source on an output leg and a dedicated return leg. The positive sourcing driver also including a switching device configured controllably connect a DC voltage supply to the output leg of the DC voltage source, a first impedance operably connected between the output leg and ground, a second impedance operably connected between the dedicated return leg and a negative voltage supply, and a clamping and limiting device operably connected in series between the dedicated return leg and ground, the clamping device configured to limit a positive voltage on the return leg.
    Type: Grant
    Filed: June 27, 2017
    Date of Patent: March 10, 2020
    Assignee: HAMILTON SUNDSTRAND CORPORATION
    Inventors: Joseph A. James, Henry Soekmadji
  • Patent number: 10581377
    Abstract: A method and associated device for detecting arcs in a photovoltaic system with an inverter and with a plurality of current collector circuits connected in parallel with the inverter via collector lines, wherein a plurality of strings of photovoltaic modules are connected in parallel with each current collector circuit via string lines. The method includes acquiring measured values of electrical variables and analyzing the measured values of the electrical variables for the presence of signs of an arc in the photovoltaic system using an analysis circuit and generating an arc signal which indicates the presence of an arc if the analyzed measured values meet predefined criteria. The method also includes acquiring measured values of acoustic variables using one or more acoustic sensors, and analyzing the measured values of the acoustic variables for the presence of signs of an arc in the photovoltaic system using the analysis circuit.
    Type: Grant
    Filed: March 9, 2017
    Date of Patent: March 3, 2020
    Assignee: SMA Solar Technology AG
    Inventor: Christopher Merz
  • Patent number: 10571526
    Abstract: A ground fault circuit interrupter device includes a switch module having a reset switch, a control switch mechanically linked to the reset switch, a ground fault detection module, a self-testing module and a tripping module. The switch module controls the electrical connection between the input and output ends of the device. The ground fault detection module detects a leakage current signal at the output end. The self-testing module is coupled to the ground fault detection module and periodically generates a self-test pulse signal which simulates the leakage current signal. The tripping module is electrically coupled to the ground fault detection module and mechanically coupled to the switch module and the control switch, to control the movement of the switch module and the control switch. The control switch, which opens and closes at the same time as the reset switch, controls the power supply to the self-testing module.
    Type: Grant
    Filed: January 23, 2018
    Date of Patent: February 25, 2020
    Assignee: Chengli Li
    Inventor: Chengli Li
  • Patent number: 10566785
    Abstract: Surge protective devices having surge protective and overvoltage protection capability are provided. In one example embodiment, the surge protective device can include a surge protection circuit. The surge protection device can include an overvoltage protection circuit coupled in series with the surge protection circuit. The overvoltage protection circuit can include a voltage sensing circuit associated with a voltage threshold, one or more switching elements, and/or a gating circuit coupled to the voltage sensing circuit. The gating circuit can be configured to control the one or more switching elements to be in a non-conducting state when the voltage sensing circuit detects a voltage that exceeds the voltage threshold.
    Type: Grant
    Filed: April 10, 2019
    Date of Patent: February 18, 2020
    Assignee: Hubbell Incorporated
    Inventors: Michael Bandel, Donald Huvaere
  • Patent number: 10527655
    Abstract: An overload monitoring device for an electrical system including a measuring device for current and/or voltage, a time measuring device and an evaluation device connected to the measuring device and the time measuring device being provided, the evaluation device being designed for generating parameters from measured values of the measuring device and/or for detecting an overload situation based on the measured values and/or the parameters using time data of the time measuring device. A method for overload monitoring of an electrical system is also described, measured values being determined for a current and/or a voltage of the electrical system; time data being determined; parameters based on the measured values being generated; and an overload situation being detected based on the measured values and/or the parameters using the time data.
    Type: Grant
    Filed: November 27, 2014
    Date of Patent: January 7, 2020
    Assignee: Robert Bosch GmbH
    Inventors: Werner Schiemann, Ralph Weinmann, Joachim Joos
  • Patent number: 10511307
    Abstract: A circuit includes a voltage source, a transistor, a load current sensor, a hardware latch and a logic circuit. The transistor is connected between the voltage source and a load. The sensor emits a fault signal when the load current exceeds a predetermined value. The hardware latch sets a latch signal when it receives the fault signal and maintains the latch signal until it receives a rearm signal. The logic circuit receives the latch signal from the hardware latch and also receives a software command for controlling turning on and off of the circuit. When the latch signal is not set, the logic circuit converts the software command to a control voltage applied at a gate of the transistor, turning on the transistor to allow power delivery to the load. A system includes a microcontroller providing software commands and rearm signals to a plurality of circuits.
    Type: Grant
    Filed: November 28, 2018
    Date of Patent: December 17, 2019
    Assignee: OVH
    Inventors: Emmanuel Joseph Henri Flipo, Christophe Maurice Thibaut
  • Patent number: 10497529
    Abstract: A universal ground fault circuit interrupter (GFCI) device for interrupting the flow of current through a pair of lines extending between a source of power and a load. The GFCI device is easily adaptable to fit into a plurality of enclosure types and includes a top surface having a stationary assembly. The stationary assembly includes a load section a GFCI circuit section, and a power source section, wherein the components of the device are arranged to minimize space, maintain arcing and dielectric prevention distances, and allow for peripheral load and source connections facilitating easy adaptability into a variety of GFCI enclosures.
    Type: Grant
    Filed: April 29, 2017
    Date of Patent: December 3, 2019
    Assignee: TOWER MFG CORP
    Inventor: Victor V Aromin
  • Patent number: 10498872
    Abstract: A mobile device having a hair straightening iron, a battery and a case body is disclosed. The case body can include a recess for receiving a mobile device and a charging port to connect to the mobile device when the mobile device is in the case body. The case body can include a switch for connecting the hair straightening iron to the battery to selectively power the hair straightening iron.
    Type: Grant
    Filed: December 8, 2016
    Date of Patent: December 3, 2019
    Assignee: DOMAIN VISTA PTY. LTD.
    Inventors: Kane Daniel McCuskey, Peter Joseph McCuskey
  • Patent number: 10486539
    Abstract: A charge demand controller device for electric vehicles or the like, preferably for installation with an existing residential electrical control panel, connects between a main switch and the electrical control panel made to operate at a maximum amperage value. The device includes a controller unit that constantly monitors an actual total load current at the input line connector from the main switch, and selectively operates a load switch controlling an electric vehicle supply equipment (EVSE) upon the actual total load current being above or below a trip value being a predetermined safety ratio of the maximum amperage value.
    Type: Grant
    Filed: August 8, 2017
    Date of Patent: November 26, 2019
    Assignees: RECHARGE VEHICULE ELECTRIQUE INC., THERMOLEC LTEE
    Inventors: David Corbeil, Chérif Menassa
  • Patent number: 10461523
    Abstract: Techniques are disclosed relating to electrical safety systems that may be useful, for example, in electromagnetic geophysical prospecting. Electromagnetic streamer systems often include a number of electrical loads in series that are powered by a constant-current power supply unit. Known techniques for detecting electrical faults have various drawbacks in such an arrangement. Embodiments of this disclosure may be used to mitigate some or all of such drawbacks.
    Type: Grant
    Filed: March 21, 2017
    Date of Patent: October 29, 2019
    Assignee: PGS Geophysical AS
    Inventor: Philip Heelan
  • Patent number: 10452460
    Abstract: A storage server system includes a storage module including at least one storage device for generating at least one present signal, a micro controller coupled to the storage module for generating a setting signal according to the at least one present signal and system information, and a tunable resistor coupled to the micro controller, wherein a resistance of the tunable resistor is corresponding to an over current protection value of the storage server system.
    Type: Grant
    Filed: January 3, 2018
    Date of Patent: October 22, 2019
    Assignee: Wiwynn Corporation
    Inventors: Cheng-Kuang Hsieh, Cheng-Yen Wu
  • Patent number: 10444725
    Abstract: A circuit protection device for an electrical distribution system includes a trip unit, a network interface, a processor, and a memory device. The trip unit is configured to selectively trip to prevent a flow of electrical current through the circuit protection device. The network interface is configured for communicative coupling to a communication network. The memory device stories instructions that, when executed by the processor, cause the processor to transmit, using the network interface, zones selective interlocking (ZSI) data to another circuit protection device coupled to the communication network. The ZSI data is formatted according to a network communication protocol of the communication network.
    Type: Grant
    Filed: February 22, 2017
    Date of Patent: October 15, 2019
    Assignee: ABB SCHWEIZ AG
    Inventors: Shawn Alan Morgan, Lathom Alexander Louco, Jeffrey Marcel Kubascik, Lucas Ray Mallory, Craig Benjamin Williams
  • Patent number: 10431972
    Abstract: An auto-monitoring circuit including a first input structured to receive a signal from a processor of a circuit interrupter, a second input structured to receive power from a circuit protected by the circuit interrupter, a first switch structured to remain closed while the signal is received at the first input and remains above a predetermined threshold level and to open when the signal ceases to be received at the first input or drops below the predetermined threshold level, a second switch structured to remain open while the first switch is closed and to close when the first switch opens, and an output electrically connected to a trip circuit of the circuit interrupter. Closing the second switch causes a trip signal to be output to the trip circuit that causes the trip circuit to trip open the separable contacts.
    Type: Grant
    Filed: January 24, 2017
    Date of Patent: October 1, 2019
    Assignee: EATON INTELLIGENT POWER LIMITED
    Inventor: Victor Doualla Epee
  • Patent number: 10416224
    Abstract: An insulation detector for highly accurately detecting or measuring, with a simple configuration, insulation resistance of a load or an apparatus to a ground or a housing and connected to an electric apparatus including one or both of an intra-apparatus capacitor and a battery, the insulation detector including an intra-insulation detector capacitor, a voltage detecting unit that detects a voltage of the intra-insulation detector capacitor, and a current-path forming switch for connecting the ground or the housing, the intra-apparatus capacitor, and the intra-insulation detector capacitor in series and forming a current path including insulation resistance of the electric apparatus. The insulation detector measures the insulation resistance by measuring a time constant of a change in the voltage of the intra-insulation detector capacitor.
    Type: Grant
    Filed: October 28, 2014
    Date of Patent: September 17, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Taichiro Tamida, Masayuki Uematsu, Akira Tanabe, Yoshitomo Hayashi, Yoji Tsutsumishita, Kosuke Tsujikawa
  • Patent number: 10404055
    Abstract: A power line resistance sensing device adapted to a lamp system with an LED module connected to a power supply between a supply line and a ground line. The power line resistance sensing device includes a control unit including a first pin connected to an LED switch to turn on or turn off the LED module; a second pin connected to a testing switch to fire a testing current from a testing current source into the lamp system before a full conduction of the lamp system; and a third pin used to receive a voltage drop induced by the testing current fired in the lamp system. The control unit is configured to compare the voltage drop with a predetermined safety voltage drop, thereby controlling the LED switch.
    Type: Grant
    Filed: August 13, 2018
    Date of Patent: September 3, 2019
    Assignee: ALFASEMI INC.
    Inventor: Yu-Cheng Chang