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公开(公告)号：US20220131362A1
公开(公告)日：2022-04-28
申请号：US17552831
申请日：2021-12-16
申请人： Hubbell Incorporated
摘要： A wiring device including an interrupting device and a controller. The interrupting device electrically connects one or more line terminals to one or more load terminals when the interrupting device is in a reset condition and disconnects the line terminals from the load terminals when the interrupting device is in a tripped condition. The controller is configured to, determine a frequency of an input voltage at the one or more line terminals, determine whether the frequency is within a predetermined range, and when the frequency is within the predetermined range, perform a test of the wiring device.
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公开(公告)号：US11277000B2
公开(公告)日：2022-03-15
申请号：US16304398
申请日：2017-03-24
发明人： Makoto Kanemaru , Mitsugi Mori , Mitsuru Tsukima
IPC分类号： H02H3/38 , G01R31/08 , G01R31/12 , H02H1/00 , H02H3/10 , H02H3/16 , H02H3/07 , H02H3/02 , H02H3/00 , H02H3/06
摘要： In a DC feed system configured by a plurality of DC electrical circuits being combined, when an arc fault occurs, it is difficult to identify a DC electrical circuit in which an arc has occurred. For this reason, a DC electrical circuit protection apparatus includes: a plurality of DC electrical circuits, each of which has a current sensor provided in at least one of a positive or a negative electrical path and has arc noise absorbing mechanism on the upstream side of the current sensor; and an arc detection device which compares respective arc noise signal strengths of the DC electrical circuits from current signals detected by the current sensors of the DC electrical circuits, and based on the signal strengths, identifies a circuit in which an arc has occurred, wherein a DC electrical circuit in which an arc has occurred is identified.
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公开(公告)号：US10439387B2
公开(公告)日：2019-10-08
申请号：US15393440
申请日：2016-12-29
申请人： Ze Chen
发明人： Ze Chen , Boon Lum Lim , Samuel Raj
摘要： In one example, a ground fault circuit interrupter is provided. It may include a current imbalance detection circuit configured to provide a leakage signal and a main processing circuit including a processor. The leakage signal may correspond to a current imbalance between a supply path and a return path. The processor may be configured to receive the leakage signal, analyze a time pattern of the leakage signal, determine whether a ground fault exists based on analysis of the time pattern, and generate a first trigger signal if the ground fault is determined to exist. The ground fault circuit interrupter may further include a back-EMF detection circuit configured to provide a back-EMF detection signal. Methods for detecting and responding to a ground fault are also provided.
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公开(公告)号：US20180366937A1
公开(公告)日：2018-12-20
申请号：US15628622
申请日：2017-06-20
发明人： David L. Smith , Michael J. Putt , Benny Naranjo
摘要： A power distribution system adapted for high current fault management during a fault event utilizes reclosing switches configured for a quick-slow-quick reclosing sequence in which the reclosing switch initially responds to the fault condition by tripping open, and then after a delay recloses for a first duration of time (slow) prior to tripping open. After another delay, the reclosing switch recloses for a second duration of time (quick) that is less than the first duration of time prior to tripping open for an indefinite interval. When installed in new segments or retrofitted in place of a fuse, reclosing switches configured with quick-slow-quick reclose timing allows for reduction of downstream customer outages, reduced FT exposure for elements upstream of a fault event and a reduction in the duration of voltage sags experienced by customers during fault events while allowing for improved fault management configurations of the power distribution system.
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公开(公告)号：US20180191150A1
公开(公告)日：2018-07-05
申请号：US15393440
申请日：2016-12-29
申请人： Ze Chen
发明人： Ze CHEN , Boon Lum Lim , Samuel Raj
CPC分类号： H02H3/17 , H02H1/0007 , H02H1/0069 , H02H3/04 , H02H3/07 , H02H3/331 , H02H3/334
摘要： In one example, a ground fault circuit interrupter is provided. It may include a current imbalance detection circuit configured to provide a leakage signal and a main processing circuit including a processor. The leakage signal may correspond to a current imbalance between a supply path and a return path. The processor may be configured to receive the leakage signal, analyze a time pattern of the leakage signal, determine whether a ground fault exists based on analysis of the time pattern, and generate a first trigger signal if the ground fault is determined to exist. The ground fault circuit interrupter may further include a back-EMF detection circuit configured to provide a back-EMF detection signal. Methods for detecting and responding to a ground fault are also provided.
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公开(公告)号：US20170125996A1
公开(公告)日：2017-05-04
申请号：US15340269
申请日：2016-11-01
申请人： Hubbell Incorporated
摘要： A wiring device including an interrupting device, a fault detection circuit, and a testing circuit. The interrupting device electrically connects a line terminal to a load terminal when the interrupting device is in a reset condition and disconnects the line terminal from the load terminal when the interrupting device is in a tripped condition. 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 is provided to the interrupting device to place the interrupting device in the tripped condition. The testing circuit is configured to determine a frequency of an input voltage at the one or more line terminals, perform a first test of the interrupting device at a first period of the frequency, and perform a second test of the fault detection circuit at a second period of the frequency.
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公开(公告)号：US08693153B2
公开(公告)日：2014-04-08
申请号：US13529218
申请日：2012-06-21
申请人： John Witte
发明人： John Witte
摘要： A device for interrupting the flow of electrical power in an electrical distribution system is provided. The device includes a sensor operably coupled to the electrical distribution system. A switching mechanism is coupled to the electrical distribution system, the switching mechanism movable between an open position and a closed position. A controller operably coupled to the sensor and the switching mechanism, the controller having a processor that is responsive to executable computer instructions when executed on the processor incrementing a first counter in a first mode of operation and a second counter in a second mode of operation. Wherein the processor is further responsive to executable computer instructions for switching from the first mode to the second mode in response to a signal from the sensor.
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公开(公告)号：US20090080130A1
公开(公告)日：2009-03-26
申请号：US11861588
申请日：2007-09-26
申请人： David Anthony Hein
发明人： David Anthony Hein
摘要： Overcurrent is prevented in an automotive vehicle based on sensing at least one operating condition. An overcurrent threshold is determined based on characteristics of the load and on the sensed condition. If the sensed flow of current exceeds the determined overcurrent threshold, the flow of current to the load is interrupted. The sensed condition may be, for example, ambient temperature.
摘要翻译： 基于感测至少一个操作条件，在汽车中防止过电流。 根据负载特性和检测条件确定过电流阈值。 如果感测到的电流超过确定的过电流阈值，则中断到负载的电流。 感测到的状况可以是例如环境温度。
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9.发明授权Sequence based network protector relay with forward overcurrent protection and antipumping feature 失效基于序列式的网络保护继电器具有正向过流保护和反向功能
公开(公告)号：US5822165A
公开(公告)日：1998-10-13
申请号：US714539
申请日：1996-09-16
申请人： Steven Alan Moran
发明人： Steven Alan Moran
CPC分类号： H02H7/224 , H02H3/07 , H02H3/081 , H02H1/0092 , H02H3/385
摘要： A digital network protector relay samples the polyphase current, network voltage and phasing voltage at 16, and preferably 32, times per cycle so that up to the seventh and fifteenth harmonics, respectively, are eliminated from the sequence calculation used to make trip and close decisions. The relay also provides metering, forward overcurrent protection, and an anti-pumping feature, the latter of which locks the circuit breaker out if a selected number of breaker operations is exceeded during a given time interval. Sequential sampling of the polyphase current and voltages by a single analog to digital converter reduces the cost of the relay. In order to accommodate metering and extraction of the fundamental components of the current and voltages for the sequence calculations, the polyphase current and network voltage are sampled sequentially in a first order for a given number of cycles and then in a second reverse order for the same given number of cycles.
摘要翻译： 数字网络保护器继电器每个周期将多相电流，网络电压和定相电压分别为16次，优选为32次，从而从用于进行跳闸和闭合判定的序列计算中分别消除高达第七和第十五次谐波 。 继电器还提供计量，正向过流保护和反抽吸功能，后者如果在给定的时间间隔内超过选定数量的断路器操作，则将断路器锁定。 通过单个模数转换器对多相电流和电压的连续采样降低了继电器的成本。 为了适应用于序列计算的电流和电压的基本分量的计量和提取，多相电流和网络电压按照给定数量的周期的第一顺序依次采样，然后以相反的顺序以相反的顺序被采样 给定循环次数。
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公开(公告)号：US5621598A
公开(公告)日：1997-04-15
申请号：US478894
申请日：1995-06-07
CPC分类号： H05B41/2856 , H02H3/07 , H02H5/04 , H02H7/00 , H05B41/2851 , H05B41/2855 , H05B41/36
摘要： A protection circuit for monitoring the power from a luminous tube transformer to a luminous tube including sensor connected to a secondary of the transformer, a window comparator circuit connected to the sensor and providing a fault signal when the sensor output exceeds the window limits, and a driver switching off power to the transformer primary when the driver receives a fault signal. A temperature compensation circuit monitors the ambient air temperature for providing a time delay before disconnecting the power supply until the luminous tube stabilizes, and also turns off the power supply when the ambient temperature exceeds upper and lower limits.
摘要翻译： 一种保护电路，用于监测从发光管变压器到包括连接到变压器次级的传感器的发光管的功率，连接到传感器的窗口比较器电路，以及当传感器输出超过窗口限制时提供故障信号，以及 当驾驶员接收到故障信号时，驱动器关闭变压器初级电源。 温度补偿电路监测环境空气温度，以在断开电源之前提供时间延迟，直到发光管稳定为止，并且当环境温度超过上限和下限时也会关闭电源。
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