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公开(公告)号：US11894662B2
公开(公告)日：2024-02-06
申请号：US17635886
申请日：2020-11-11
申请人： TDK Electronics AG
发明人： Eduard Dorsch , Frank Werner
IPC分类号： H01T4/16 , G01R19/165 , H02H3/32
CPC分类号： H01T4/16 , G01R19/165 , H02H3/325
摘要： In an embodiment a device includes a first arrester unit with at least one first gas-filled surge arrester and a second arrester unit with at least one second gas-filled surge arrester, wherein the first and second arrester units are connected in series with one another between a first potential node and a reference potential node, wherein the first arrester unit and the second arrester unit are different from each other, wherein the first arrester unit includes a larger response voltage than the second arrester unit, and wherein the first arrester unit includes a smaller arc voltage than the second arrester unit.
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公开(公告)号：US20230184849A1
公开(公告)日：2023-06-15
申请号：US18075546
申请日：2022-12-06
发明人： Daniel Gonzalez
摘要： A method for detecting an electrical fault in an electrical installation comprises steps of includes: measuring an alternating electric current flowing through the electrical installation; detecting an electrical fault on the basis of the measured electric current; and tripping the electrical protection device when an electrical fault is identified by the electronic control device. The detection of the fault includes identifying a transition of the measured current from a first level to a second level with a duration lower than a predefined threshold which is lower than or equal to 10% of the nominal period of the alternating electric current, the first level and the second level corresponding to current values of opposite sign but the amplitude of which, in terms of absolute value, is higher than a predefined current threshold equal to the product of the trip threshold of the protection device and a weighting coefficient.
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公开(公告)号：US11622420B2
公开(公告)日：2023-04-04
申请号：US16688354
申请日：2019-11-19
IPC分类号： H05B3/68 , H05B1/02 , A47J37/07 , A47J37/06 , H02H3/16 , H02H3/10 , H02H3/32 , H02H1/00 , H02H3/08 , H02H3/04
摘要： Provided is an apparatus and method for protecting against unsafe electric current conditions. A protections circuit may be used in a device, such as an electric grill, that has one or more electric loads, such as heating elements. The protection circuit may protect against various failure scenarios, including, without limitation, instances of ground fault, over current, driver failure, and failure of a microprocessor. In response to a failure, the protection circuit may trip a latch relay or disable a triac driver to stop current from flowing.
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公开(公告)号：US11581726B2
公开(公告)日：2023-02-14
申请号：US17610282
申请日：2019-06-26
申请人： ZHEJIANG UNIVERSITY
发明人： Yan Han , Mohan Yu , Zhijie Cheng
摘要： The present disclosure discloses a self-check chip of a leakage protector. The self-check chip includes a power-on reset circuit, used for resetting the self-check chip after being powered-on; a reference voltage module, used for providing a reference voltage for a comparator module; a bias circuit, used for providing direct-current bias for the reference voltage module, the comparator module and a ring oscillator; the comparator module, used for monitoring an open-circuit condition of a trip coil and the change of a thyristor anode voltage and generating a power frequency clock; the ring oscillator, used for providing a clock for a counting module and a digital processing module; the counting module, used for generating a self-check signal, a leakage trigger signal, a PHASE pin detection signal and a reset signal of the counting module and the digital processing module; a trip enabling signal generation module; and the digital processing module.
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公开(公告)号：US11190003B2
公开(公告)日：2021-11-30
申请号：US16291381
申请日：2019-03-04
发明人： Tim Pfizenmaier , Daniel Spesser , Michael Kammer , Florian Habel , Eckhard Broeckmann , Frank Mehling , Michael Guenther Zeyen , Wolfgang Hofheinz , Guenter Uhl , Dietmar Bytzek , Juergen Hetzler , Stefan Zeltner , Stefan Endres , Christoph Sessler
摘要： A method for controlling a charging apparatus of a vehicle, in particular an electric or hybrid vehicle, wherein the charging apparatus has a charging device including a protection and monitoring device. The vehicle includes a high-voltage on-board power system and an electrical energy storage apparatus connected to the high-voltage on-board power system. The method includes electrically connecting the high-voltage on-board power system to charging connections of an energy supply system by the charging apparatus. The charging connections include a neutral conductor, a protective conductor and at least one phase conductor. A protective conductor resistance is detected between the neutral conductor and the protective conductor by feeding in a test current by the protection and monitoring device. A frequency of the test current is filtered out of the compensation frequency range on a narrowband basis.
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公开(公告)号：US20210335298A1
公开(公告)日：2021-10-28
申请号：US17370614
申请日：2021-07-08
发明人： Tomohiro TASHIRO
摘要： A gate driver IC includes a first diode, a second diode, a first comparator, a second comparator, and a judgement circuit. The first comparator compares a first potential difference between both ends of the first diode and a first threshold. The second comparator compares a second potential difference between both ends of the second diode and a second threshold. Based on comparison results of the first comparator and the second comparator, the judgement circuit determines occurrence of disconnection.
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公开(公告)号：US10916930B2
公开(公告)日：2021-02-09
申请号：US16081444
申请日：2017-03-01
IPC分类号： H02H3/04 , H02H3/32 , H02H7/26 , G01R31/62 , G01R31/327
摘要： In the field of electrical power systems there is provided a method of supervising the operation of a plurality of current transformers that are arranged in respective current transformer within differing protection zones of a multi-phase electrical power system. The method of supervising comprises the steps of: (a) identifying a faulty protection zone within the electrical power system; (b) identifying a faulty current transformer group within the faulty protection zone; and (c) identifying faulty phase(s) within the faulty current transformer group within the faulty protection zone.
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公开(公告)号：US10516259B2
公开(公告)日：2019-12-24
申请号：US15321828
申请日：2014-06-27
发明人： Christian Blug , Guenter Ebner , Li Shang-Jaeger , Kai Trunk , Klaus Wuerflinger , Marcus Zeller
摘要： A method and a device provide protection for a multi-terminal HVDC grid against faults. The method includes measuring a DC displacement voltage having a polarity and a value, determining if a short circuit fault exists by comparing the DC displacement voltage with a threshold displacement voltage and identifying a fault type based on the polarity and the value of the DC displacement voltage. The disclosed device contains a converter having a positive pole and a negative pole, a DC-switch substation, a DC line connecting the converter and the DC-switch substation and a transient fault detector. The transient fault detector contains a positive voltage sensor sensing a positive transient voltage of the positive pole and a negative voltage sensor sensing a negative transient voltage of the negative pole and a control unit which is adapted to derive a DC displacement voltage from the positive and the negative transient voltages.
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公开(公告)号：US10410816B2
公开(公告)日：2019-09-10
申请号：US15582746
申请日：2017-04-30
申请人： Ze Chen
发明人： Ze Chen , Boon Lum Lim , Samuel Raj
IPC分类号： H01H71/02 , H02H1/00 , H01H71/04 , H01H71/62 , H01H83/04 , H02H3/32 , H01H71/24 , H01H71/58 , H01H83/20
摘要： In one example, a hybrid circuit interrupter may include a three-coil architecture, first coil circuitry, leakage detection circuitry, and a main processing circuit including a processor. The three-coil architecture may include a coil housing, three coils, and a plurality of coil assembly conductors. The coils may be disposed within the coil housing. The coil assembly conductors may be at least partially disposed within the coil housing. The first coil circuitry may be connected to the first coil and may generate first coil signals. The leakage detection circuitry may be connected to the other two coils and may generate a leakage signal. The processor may receive the first coil signals, receive the leakage signal, determine whether an arc fault exists based on the first coil signals, determine whether a ground fault exists based on the leakage signal, and generate a first trigger signal if a fault is determined to exist.
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公开(公告)号：US20190097415A1
公开(公告)日：2019-03-28
申请号：US15716584
申请日：2017-09-27
申请人： Eaton Corporation
发明人： Andrew Yang , Tom Xiong , Harry Zhang , Alex Zhuang , Jerry Zhang , George Zhang
IPC分类号： H02H3/32 , H02H3/04 , G01R19/165
摘要： An electronic device that is configured to be coupled to an alternating current (AC) power unit that includes an AC input power signal is described. The electronic device includes a reference signal generator circuit that is configured to generate a reference signal based on a direct current (DC) power source, a voltage divider circuit that is configured to scale the reference signal for application to the AC input power signal to generate a divided AC input power signal, an amplifier circuit that is configured to output a fault indication signal responsive to the divided AC input power signal, and an amplifier control circuit that is coupled to the amplifier circuit and is configured to control a fault indication signal level of the fault indication signal that is output by the amplifier circuit. Related methods and computer program products are also described.
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