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公开(公告)号：US20230411952A1
公开(公告)日：2023-12-21
申请号：US18036071
申请日：2021-11-05
发明人： Vincent CHAPERON , Damien ELMAALOUF
IPC分类号： H02H3/347
CPC分类号： H02H3/347
摘要： A device for monitoring and protecting equipment powered by at least one solid-state power controller (SSPC) including at least one current measurement circuit having a current measuring transformer receiving at a primary at least three phases of a three-phase power supply of the equipment, a measuring and testing module including a controller for measuring a current at a secondary Im, representative of a differential current Id at the primary, and a channel for injecting current into said transformer, the channel having a current Iinj generator controlled by an output of the controller and connected to an injection winding on the transformer, the injection winding including a number of turns Nin so that the current Iinj produces in said measurement windings a test current Im of said secondary in the absence of current at the primary.
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公开(公告)号：US11831150B2
公开(公告)日：2023-11-28
申请号：US18102553
申请日：2023-01-27
申请人： Hubbell Incorporated
发明人： Roy Itzler , Nicole Gay
摘要： A temporary power delivery system includes a power source, a booth stringer, and a portable GFCI device. The GFCI device is receives current from the power source by a first terminal and delivers current to the booth stringer by a second terminal. An electronic processor of the GFCI device compares a combined magnitude of current flowing through first and second phase conductors of the GFCI device to a magnitude of current flowing through a neutral conductor of the GFCI. The electronic processor also compares a first voltage between the first phase conductor and neutral conductor to a second voltage between the second phase conductor and neutral conductor. A circuit breaker of the GFCI device is opened if a difference between the combined magnitude of phase conductor current and neutral conductor current exceeds a first threshold or a difference between the first voltage and second voltage exceeds a second threshold.
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公开(公告)号：US20200235562A1
公开(公告)日：2020-07-23
申请号：US16745658
申请日：2020-01-17
申请人： Bender GmbH & Co. KG
发明人： Lars Morich
摘要： An electric circuit device and method is for recognizing a closed switch contact as well as a protective ground conductor interruption in a one- or multiphase electric supply line. A control of a residual current monitoring device (RCMB control) includes one fault current control unit for generating a control signal pattern including a series of switching-on impulses forwarded to a first electronic switch unit to activate a possible artificial passive fault current on one or more active conductors and the protective ground conductor (as a return conductor), this fault current actually flowing, being recognized, and evaluated in a closed circuit in a closed switch contact to be tested and an intact protective conductor. Owing to control signal patterns varying during monitoring, a reliable detection of the artificial passive fault current is ensured even in large dynamic disturbance levels while the electric installation (supply line) to be monitored is in operation.
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4.发明申请公开(公告)号：US20180059163A1
公开(公告)日：2018-03-01
申请号：US15691999
申请日：2017-08-31
发明人： Jinhe Huang
CPC分类号： G01R31/025 , G01R15/185 , G01R31/44 , H02H3/16 , H02H3/162 , H02H3/32 , H02H3/33 , H02H3/347 , H02J13/00 , H05B41/2813
摘要： A quick-action leakage detection protection circuit with a regular self-checking function is provided. The quick-action leakage detection protection circuit may include a power input end, a power load end, a power user end, twin induction coils for detecting leakage current and low resistance failure, a control chip, a trip coil in which an iron core is disposed, a reset button, a self-checking chip, and a self-checking silicon controlled rectifier. The reset button may be linked with a main circuit switch, an analog path switch, and a normally-open self-checking path switch. The main circuit switch may include a pair of dynamic contact levers extended from the power load end, a first pair of static contact ends extended from the power input end passing through the twin induction coils, and a second pair of static contact ends extended from the power user end. In some embodiments, a first end of the trip coil may be connected to a live line end of the power input end and to the live line of the power load end via the first normally-closed switch. And, a second end of the trip coil may be connected to a neutral line end of the power load end via a second normally-closed switch.
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公开(公告)号：US20050225909A1
公开(公告)日：2005-10-13
申请号：US10920680
申请日：2004-08-18
申请人： Akio Yoshizaki , Naohiro Takakamo , Satoko Gotou , Hideki Hayakawa , Tetsunori Watanabe , Haruki Shibuya
发明人： Akio Yoshizaki , Naohiro Takakamo , Satoko Gotou , Hideki Hayakawa , Tetsunori Watanabe , Haruki Shibuya
CPC分类号： H02H3/33 , H01H83/144 , H01H2011/0068 , H02H3/042 , H02H5/04
摘要： The system makes it possible to monitor various electrical variables by using a simple structure at low cost with ease and with high reliability by a circuit breaker which jointly includes a current transformer to detect current, a transformer to detect voltage, and a zero-phase current transformer to detect leakage current, in addition to the switch controller to perform the basic function of the circuit breaker. Moreover, the system also provides a function to display various measured values, obtained as described above, by a display unit that can be detached and installed separately from the measuring section to display data sent in digital form by data transmission.
摘要翻译： 该系统可以通过简单的结构以低成本简单的结构来监视各种电气变量，并且通过断路器来监测各种电气变量，该断路器共同包括检测电流的电流互感器，检测电压的变压器和零相电流 变压器检测漏电流，除开关控制器外还执行断路器的基本功能。 此外，该系统还提供了一种显示单元获得的各种测量值的功能，该显示单元可以与测量部分别地分离和安装，以显示通过数据传输以数字形式发送的数据。
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公开(公告)号：US4714975A
公开(公告)日：1987-12-22
申请号：US720130
申请日：1985-04-05
申请人： Robert F. Dvorak
发明人： Robert F. Dvorak
摘要： A self-contained test feature for ground fault protection systems in circuit breakers. The ground fault protection system includes a sensing transformer having a primary winding that sums the currents through the phase current transformers. Upon the occurrence of an actual ground fault, the sensing transformer will transmit a signal to cause the breaker to trip. The test feature includes a test transformer having its secondary winding electrically connected in parallel with the primary winding of the sensing transformer. The current path between the test transformer secondary winding and sensing transformer primary winding is completed only upon the activation of a test switch. The primary winding of the test transformer is hooked to an external current source to provide the necessary current to simulate the ground fault.
摘要翻译： 断路器接地故障保护系统的独立测试功能。 接地故障保护系统包括具有初级绕组的感测变压器，其将通过相电流互感器的电流相加。 在发生实际接地故障时，感应变压器将传输一个信号使断路器跳闸。 测试特征包括具有与感测变压器的初级绕组并联电连接的次级绕组的测试变压器。 测试变压器次级绕组和感测变压器初级绕组之间的电流通路仅在激活测试开关时完成。 测试变压器的初级绕组挂接到外部电流源，以提供必要的电流来模拟接地故障。
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公开(公告)号：US4667263A
公开(公告)日：1987-05-19
申请号：US725611
申请日：1985-04-22
申请人： Robert A. Morris , Paul T. Rajotte
发明人： Robert A. Morris , Paul T. Rajotte
CPC分类号： H01H83/04 , H01H71/123 , H01H1/58 , H01H1/5855 , H01H11/00 , H01H71/0207 , Y10T29/49105
摘要： A ground fault module is designed for ease of assembly within a ground fault circuit breaker. The module houses the pre-assembled signal processor module, which contains the ground fault circuit interruption logic, along with the mechanical components required for translating the trip initiating response from the signal processor solenoid to the circuit breaker operating mechanism. The ground fault test button and related circuitry are also supported within the ground fault module.
摘要翻译： 接地故障模块设计成易于在接地故障断路器内组装。 该模块包含预组装的信号处理器模块，其包含接地故障电路中断逻辑以及将信号处理器电磁阀的跳闸启动响应转换到断路器操作机构所需的机械部件。 接地故障模块中也支持接地故障测试按钮及相关电路。
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公开(公告)号：US3764853A
公开(公告)日：1973-10-09
申请号：US3764853D
申请日：1971-12-27
申请人： BEACHLEY R
发明人： BEACHLEY R
摘要： Circuitry for detection of ground fault currents in alternating current circuits utilizable with grounded or ungrounded systems and for protectively interrupting the circuits, comprises means for deriving monitoring signals from representative of the fault currents and applying the signals to first and second relays. The first relay is responsive at a low level of fault current to pass control current from a source of control power to warning such as a lamp and horn. The second relay is responsive at a higher level of fault current to pass control current to an interrupter device for the circuits being monitored. Adjustment means in the circuitry sets the two threshold levels of fault current at which the relays respectively respond. Seal-in circuit means keep the first relay actuated to activate the alarms continuously after their operation is initiated. A time delay network prevents relay response to instantaneous transient currents exceeding the lower threshold. The circuitry is unitized for use at any standard voltage, current and frequency and to isolate all current carrying components. The circuits being monitored can serve as a source of control power or an independent source can be provided.
摘要翻译： 用于检测交流电路中的接地故障电流的电路可用于接地或非接地系统并用于保护性地中断电路，包括用于从代表故障电流导出监测信号并将信号施加到第一和第二继电器的装置。 第一个继电器在低电平故障电流下响应，以将控制电流从控制电源传递到诸如灯和喇叭的警告。 第二继电器在更高级别的故障电流下响应，以将控制电流传送到被监测电路的断续器装置。 电路中的调节装置设置继电器分别响应的故障电流的两个阈值电平。 密封电路意味着保持第一个继电器的启动，以在其操作开始后连续地启动报警。 时间延迟网络防止对超过下限阈值的瞬时瞬态电流的继电器响应。 该电路单元化，可用于任何标准电压，电流和频率，并隔离所有载流元件。 被监控的电路可以用作控制电源或者可以提供独立的电源。
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公开(公告)号：US3721862A
公开(公告)日：1973-03-20
申请号：US3721862D
申请日：1971-08-30
摘要： A ground fault detecting system including a current monitor, a ground fault sensor and a circuit breaker. The ground fault sensor responds to the presence of ground fault current to actuate a circuit breaker to open the circuit in which the ground fault current is flowing. The ground fault sensor includes circuit elements which perform corresponding circuit functions such as time delay and reset. The ground fault sensor is adapted to provide an adjustable or variable time delay so that the circuit breaker to be tripped may be delayed in tripping through a wide range of time periods after the initial sensing of the ground fault current.
摘要翻译： 一种接地故障检测系统，包括电流监测器，接地故障传感器和断路器。 接地故障传感器响应接地故障电流的存在来启动断路器以打开接地故障电流流过的电路。 接地故障传感器包括执行相应电路功能（如延时和复位）的电路元件。 接地故障传感器适于提供可调节或可变的时间延迟，以便在初始感测接地故障电流之后的较宽范围的时间段内，跳闸的断路器可能被延迟跳闸。
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公开(公告)号：US3660722A
公开(公告)日：1972-05-02
申请号：US3660722D
申请日：1970-05-07
发明人： WILSON JOHN T , ENGEL JOSEPH C
摘要： A circuit breaker including separable contacts, an operating means for opening and closing the contacts, and a protective relay device for detecting ground faults in an alternating current system when the ground current in the system being protected increases above a predetermined level which for certain values of line currents in the protected system varies with the line currents in the associated system. A current transformer is arranged to provide the energy or power necessary for the output of the device and also to provide a first signal which varies with the ground current in the system and other means is provided for deriving a second signal from the associated system which varies with the line current in the system for with the highest line current in the system with said protective device arranged to respond to both of said signals.
摘要翻译： 一种包括可分离触点的断路器，用于打开和闭合触点的操作装置，以及用于在被保护的系统中的接地电流检测到的交流系统中的接地故障的保护继电器装置，其高于预定水平， 受保护系统中的线路电流随相关系统中的线路电流而变化。 电流互感器被布置成提供装置的输出所需的能量或功率，并且还提供随着系统中的接地电流而变化的第一信号，并且提供其他装置用于从相关联的系统导出第二信号 系统中的线路电流用于系统中具有最高线路电流，其中所述保护装置被布置成响应于所述两个信号。
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