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公开(公告)号：US20240339825A1
公开(公告)日：2024-10-10
申请号：US18745276
申请日：2024-06-17
IPC分类号： H02H3/08 , G01R15/20 , G01R19/175 , H01H9/54 , H01H9/56 , H01H33/59 , H01H71/04 , H01H71/12 , H01H71/24 , H02H1/00 , H02H3/33 , H02J13/00 , H02M7/06
CPC分类号： H02H3/08 , G01R15/202 , G01R19/175 , H01H9/542 , H01H9/548 , H01H9/56 , H01H9/563 , H01H33/593 , H01H71/04 , H01H71/128 , H01H71/24 , H02H1/0007 , H02H1/0092 , H02H3/33 , H02J13/00022 , H01H2009/543 , H01H2009/546 , H01H2300/03 , H02H3/085 , H02M7/06
摘要： A circuit breaker comprises a solid-state bidirectional switch, a switch control circuit, current and voltage sensors, and a processor. The solid-state bidirectional switch is connected between a line input terminal and a load output terminal of the circuit breaker, and configured to be placed in a switched-on state and a switched-off state. The switch control circuit control operation of the bidirectional switch. The current sensor is configured to sense a magnitude of current flowing in an electrical path between the line input and load output terminals and generate a current sense signal. The voltage sensor is configured to sense a magnitude of voltage on the electrical path and generate a voltage sense signal. The processor is configured to process the current and voltage sense signals to determine operational status information of the circuit breaker, a fault event, and power usage information of a load connected to the load output terminal.
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公开(公告)号：US12034309B2
公开(公告)日：2024-07-09
申请号：US18297832
申请日：2023-04-10
发明人： Yoav Galin , Meir Adest , Israel Gershman , Guy Sella
IPC分类号： H02H3/00 , G01K11/06 , H01H33/02 , H01H85/04 , H02H1/00 , H02H3/33 , H02J3/38 , H02J3/46 , H02J7/35 , H02S40/34 , H02S40/36 , G08B17/06
CPC分类号： H02J3/46 , G01K11/06 , H01H33/02 , H01H85/04 , H02H1/0015 , H02H3/334 , H02J3/38 , H02J3/381 , H02J7/35 , H02S40/34 , H02S40/36 , G08B17/06 , H02J2300/26 , Y02E10/56
摘要： Various implementations described herein are directed to a method for detecting, by a device, an increase in temperature at certain parts of an electrical system, and taking appropriate responsive action. The method may include measuring temperatures at certain locations within the system and estimating temperatures at other locations based on the measurements. Some embodiments disclosed herein include an integrated cable combining electrical conduction and heat-detection capabilities, or an integrated cable or connector combining electrical conduction with a thermal fuse.
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公开(公告)号：US20240222954A1
公开(公告)日：2024-07-04
申请号：US18101060
申请日：2023-01-24
CPC分类号： H02H3/331 , H01H83/144
摘要： A ground fault circuit interrupter (GFCI) can include a current transformer (CT) comprising a single core, a first winding wound around the single core, and a second winding wound around the single core. The GFCI can include a ground fault (GF) detection module operatively connected to the first winding to receive signals from the first winding and configured to determine whether a line-to-ground fault exists. The GFCI can also include a GN stimulus operatively connected to the second winding to provide a GN stimulus signal to the second winding. The GFCI can also include a grounded neutral (GN) detection module operatively connected to second winding and configured to receive signals from the second winding to determine whether a neutral-to-ground fault exists.
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4.发明公开公开(公告)号：US20240213755A1
公开(公告)日：2024-06-27
申请号：US18288688
申请日：2022-02-21
发明人： Zhanyu XUE , Jinchun XING
CPC分类号： H02H1/0007 , H02H1/0061 , H02H3/30 , H02H7/261 , H02H3/33
摘要： Disclosed is a fault monitoring method for a multi-port internal passive load-free probabilistic load flow (PLF) electric network. Current transformers are installed on the conductors. Currents from the current transformers are transformed into voltages, and the voltages are then converted into pulses by a voltage-to-frequency conversion (VFC) circuit. The pulses are transmitted via optical fiber to a comparison module, and an algebraic sum of all pulse counts is calculated. It is stipulated that when an installation direction of the current transformer is the same as a direction of the port pointing to the PLF electric network, the pulse count is positive, and when the installation direction of the current transformer is opposite to the direction of the port pointing to the PLF electric network, the pulse count is negative. When the algebraic sum exceeds a threshold, it is determined that a fault has occurred within the PLF electric network. This method is designed for an electric network where the direction of power transmission is uncertain, and can promptly and accurately detect whether faults such as single-phase grounding and interphase short-circuiting have occurred within the electric network. The method achieves advantages such as fast fault response, and precise and timely detection.
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公开(公告)号：US11996488B2
公开(公告)日：2024-05-28
申请号：US17587358
申请日：2022-01-28
发明人： Liron Har-Shai , Alon Zohar , Yoav Galin , Meir Adest
CPC分类号： H01L31/02021 , H02H7/20 , H02J3/46 , H02H3/16 , H02H3/33 , H02J3/381 , H02J2300/24 , Y02E10/56
摘要： A direct current (DC) power combiner operable to interconnect multiple interconnected photovoltaic strings is disclosed. The DC power combiner may include a device adapted for disconnecting at least one photovoltaic string from the multiple interconnected photovoltaic strings, each photovoltaic string connectible by a first and second DC power line. The device may include a differential current sensor adapted to measure differential current by comparing respective currents in the first and second DC power lines. A first switch is connected in series with the first DC power line. A control module is operatively attached to the differential current sensor and the first switch. The control module may be operable to open the first switch when the differential current sensor measures the differential current to be greater than a maximum allowed current differential, thereby disconnecting the photovoltaic string from the interconnected photovoltaic strings.
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公开(公告)号：US11855442B2
公开(公告)日：2023-12-26
申请号：US17476822
申请日：2021-09-16
申请人： ABB Schweiz AG
摘要： A grounded neutral fault detector that includes induction circuits and a controller is provided. The controller is configured to determine a frequency of a test signal by measuring load noise based on a first leakage signal corresponding to a first current imbalance between the line conductor and the neutral conductor for the load without the test signal being injected, analyzing a frequency spectrum of the load noise, and selecting the frequency of the test signal. The controller is further configured to inject the test signal at the selected frequency to the neutral conductor, measure impedance of a current loop formed by a potential grounded neutral fault based on a second leakage signal corresponding to a second current imbalance with the test signal being injected, and determine a grounded neutral fault.
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公开(公告)号：US20230408575A1
公开(公告)日：2023-12-21
申请号：US18450547
申请日：2023-08-16
申请人： Hubbell Incorporated
CPC分类号： G01R31/2827 , H02H3/044 , H01H83/04 , G01R31/52 , H01H2300/052 , H02H3/162 , H02H3/335 , H01H71/04 , H01H2071/044 , G01R31/50
摘要： A method of operating an auto-monitoring circuit of a circuit interrupting device. The method including monitoring one or more signals to determine an operating state of said circuit interrupting device; outputting a first signal having a first voltage level based on the operating state, wherein the first voltage level is greater than zero volts; and outputting, after outputting the first signal, a second signal having a second voltage level based on the operating state, wherein the second voltage level is greater than the first voltage level.
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公开(公告)号：US11807384B2
公开(公告)日：2023-11-07
申请号：US17488469
申请日：2021-09-29
发明人： Patrick Oms
摘要： A device includes a current difference measurement module for measuring the difference between a current flowing in a positive contact of the electrical installation and a current flowing in a negative contact of the electrical installation, a low-pass filter for filtering the differential current, a full-wave rectifier without threshold module for rectifying the filtered current and a trip module for emitting a trip command when the rectified current is greater than or equal to a predetermined threshold for a predetermined duration. The device thus makes it possible to protect a DC-voltage electrical installation in a noisy environment.
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公开(公告)号：US20230331089A1
公开(公告)日：2023-10-19
申请号：US18207872
申请日：2023-06-09
IPC分类号： B60L3/00 , H01H9/54 , H01H83/02 , B60L3/04 , H02H1/00 , H02H3/00 , H02H3/33 , B60L53/30 , B60L53/68 , B60L53/66 , B60L53/18 , B60L53/51
CPC分类号： B60L3/00 , H01H9/548 , H01H83/02 , B60L3/0069 , B60L3/04 , H02H1/0061 , H02H3/006 , H02H3/33 , B60L53/305 , B60L53/68 , B60L53/665 , B60L53/18 , B60L53/51 , Y02T90/14 , Y04S30/12 , Y04S30/14 , H02J3/008
摘要： A circuit breaker for an electric load includes first and second terminals; a number of first separable contacts each electrically connected between one of the first terminals and one of the second terminals; a first mechanism to open, close or trip open the first contacts; a number of second separable contacts each electrically connected in series with a corresponding one of the first contacts; a second mechanism to open or close the second contacts; a processor to cause the second mechanism to open or close the second contacts, annunciate through one of the second terminals a power circuit electrical parameter for the electric load, receive from a number of the second terminals a confirmation from or on behalf of the electric load to cause the second mechanism to close the second contacts, and determine a fault state operatively associated with current flowing through the second contacts.
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公开(公告)号：US20230327425A1
公开(公告)日：2023-10-12
申请号：US18334825
申请日：2023-06-14
摘要： An apparatus for detecting an open neutral condition in a split phase power system is described. The apparatus includes two powered lines providing output electricity to an electrical distribution system and a shared neutral line providing a grounded neutral to the first and second powered lines. The apparatus is configured for detecting when an open neutral condition is present in the split phase power system by determining when a power current is present on one or both of the first and second powered lines while a return current is not present on the neutral line; and in response to detecting that the open neutral condition is present, causing an interrupter to interrupt the power supplied by the first and second powered lines or to generate a signal indicating an open condition.
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