Circuit analyzing system
    1.
    发明授权

    公开(公告)号:US5499155A

    公开(公告)日:1996-03-12

    申请号:US373684

    申请日:1995-01-17

    摘要: A circuit analyzing system includes a current transformer for extracting current from a phase or neutral conductor of a three phase line, a filter connected to the output of the current transformer and functioning to substantially trap current at the fundamental frequency while substantially passing currents at various harmonic frequencies thereof, and signal processing circuitry connected to the output of the filter to perform various functions with the harmonic frequency current input thereto. Among these functions, as shown in various preferred embodiments, are measurement of the harmonic signal in RMS and conveyance of the output to a display instrument for a user or utility's convenience in monitoring harmonic frequency circuits, which have become more common with the advent of electronic equipment having internal power supplies such as personal computers, work stations, printers, and the like. Other functions include a user or utility's connecting a demand circuit mechanism to the measured currents (preferably RMS/harmonic frequency currents), and/or using comparator circuitry to sense the measured harmonic frequency currents and, if they exceed a desired level set by the user or utility, to output a signal to a tripping device such as a power contactor or relay which will in turn institute load shedding.

    Circuit analyzing system
    2.
    发明授权
    Circuit analyzing system 失效
    电路分析系统

    公开(公告)号:US5383084A

    公开(公告)日:1995-01-17

    申请号:US1885

    申请日:1993-01-08

    摘要: A circuit analyzing system includes a current transformer for extracting current from a phase or neutral conductor of a three phase line, a filter connected to the output of the current transformer and functioning to substantially trap current at the fundamental frequency while substantially passing currents at various harmonic frequencies thereof, and signal processing circuitry connected to the output of the filter to perform various functions with the harmonic frequency current input thereto. Among these functions, as shown in various preferred embodiments, are measurement of the harmonic signal in RMS and conveyance of the output to a display instrument for a user or utility's convenience in monitoring harmonic frequency circuits, which have become more common with the advent of electronic equipment having internal power supplies such as personal computers, work stations, printers, and the like. Other functions include a user or utility's connecting a demand circuit mechanism to the measured currents (preferably RMS/harmonic frequency currents), and/or using comparator circuitry to sense the measured harmonic frequency currents and, if they exceed a desired level set by the user or utility, to output a signal to a tripping device such as a power contactor or relay which will in turn institute load shedding.

    摘要翻译: 电路分析系统包括用于从三相线路的相或中性导线提取电流的电流互感器,连接到电流互感器的输出的滤波器,并且用于基本上在基本上通过各种谐波的电流捕获电流 频率和连接到滤波器的输出的信号处理电路,以执行输入谐波频率电流的各种功能。 在这些功能中,如各种优选实施例所示,是测量RMS中的谐波信号和输出到用户的显示仪器的输出或公用设施监视谐波频率电路的便利性,这在电子出现时变得更加普遍 具有诸如个人计算机,工作站,打印机等内部电源的设备。 其他功能包括用户或实用工具将需求电路机构连接到所测量的电流(优选RMS /谐波频率电流)和/或使用比较器电路来感测所测量的谐波频率电流,并且如果它们超过用户设定的期望电平 或实用程序,以将信号输出到诸如电力接触器或继电器的跳闸装置,这将进而引起负载脱落。

    Circuit analyzing system
    3.
    发明授权
    Circuit analyzing system 失效
    电路分析系统

    公开(公告)号:US5729421A

    公开(公告)日:1998-03-17

    申请号:US604625

    申请日:1996-02-21

    摘要: A circuit analyzing system includes a current transformer for extracting current from a phase or neutral conductor of a three phase line, a filter connected to the output of the current transformer and functioning to substantially trap current at the fundamental frequency while substantially passing currents at various harmonic frequencies thereof, and signal processing circuitry connected to the output of the filter to perform various functions with the harmonic frequency current input thereto. Among these functions, as shown in various preferred embodiments, are measurement of the harmonic signal in RMS and conveyance of the output to a display instrument for a user or utility's convenience in monitoring harmonic frequency circuits, which have become more corrosion with the advent of electronic equipment having internal power supplies such as personal computers, work stations, printers, and the like. Other functions include a user or utility's connecting a demand circuit mechanism to the measured currents (preferably RMS/harmonic frequency currents), and/or using comparator circuitry to sense the measured harmonic frequency currents and, if they exceed a desired level set by the user or utility, to output a signal to a tripping device such as a power contactor or relay which will in turn institute load shedding.

    摘要翻译: 电路分析系统包括用于从三相线路的相或中性导线提取电流的电流互感器,连接到电流互感器的输出的滤波器,并且用于基本上在基本上通过各种谐波的电流捕获电流 频率和连接到滤波器的输出的信号处理电路,以执行输入谐波频率电流的各种功能。 在这些功能中,如各种优选实施例所示,是测量RMS中的谐波信号和输出到用户的显示仪器的输出或公用设施监视谐波频率电路的便利性,其随着电子出现而变得更加腐蚀 具有诸如个人计算机,工作站,打印机等内部电源的设备。 其他功能包括用户或实用工具将需求电路机构连接到所测量的电流(优选RMS /谐波频率电流)和/或使用比较器电路来感测所测量的谐波频率电流,并且如果它们超过用户设定的期望电平 或实用程序,以将信号输出到诸如电力接触器或继电器的跳闸装置,这将进而引起负载脱落。

    Ground fault circuit interrupter incorporating miswiring prevention
circuitry

    公开(公告)号:US5729417A

    公开(公告)日:1998-03-17

    申请号:US572811

    申请日:1995-12-15

    IPC分类号: H02H3/04 H02H3/33 H02H3/28

    CPC分类号: H02H3/338 H02H3/04

    摘要: A ground fault circuit interrupter (GFCI) with built in intelligence is described that includes circuitry to automatically indicate a device miswiring condition. When a GFCI is wired with its AC and LOAD terminals reversed, downstream devices are still protected in the event of a ground fault but the duplex receptacle on the GFCI itself is not. The invention incorporates miswiring sense circuitry that automatically triggers the generation of visual and audible alarms in the event a miswiring condition is sensed. The invention employs an alarm inhibiting technique that incorporates sense circuitry connected to the AC terminals on one side of the internal GFCI switches or relays and alarm generation circuitry connected to the LOAD terminals on the opposite side.

    Intelligent ground fault circuit interrupter

    公开(公告)号:US5715125A

    公开(公告)日:1998-02-03

    申请号:US790037

    申请日:1997-01-28

    摘要: An intelligent circuit interrupt system is electrically connected between an AC source and a load for interrupting a flow of AC from the source to the load upon detection of an interrupt condition. A circuit interrupter electrically connected to phase and neutral terminals of the AC source defines the interrupt condition. A relay switch with a relay coil and phase and neutral contacts is included such that line and load ends of the phase contact are electrically connected, respectively, between the interrupt means load side phase port and a phase terminal of the load. Line and load ends of the neutral contact are electrically connected, respectively, between the interrupt neutral port and a neutral terminal of the load. The relay coil is electrically coupled between load sides of said phase and neutral contacts for controlling the contacts in response to the interrupt signal. An open-contact miswiring detector (OCMD) is electrically connected to one of the phase and neutral contacts for detecting a miswiring condition when the contacts are in an open state, and a closed-contact miswiring detector (CCMD) is electrically connected to the OCMD and to one of the neutral and phase contacts for detecting a miswiring condition when the contacts are in a closed state. A timing signal generator generates system timing signals. A test circuit electrically coupled to the interrupt means and the timing signal generator tests the interrupt means operability. An alarm circuit is electrically responsive to the test circuit, the timing signal generator, the OCMD and the CCMD for communicating an open-contact miswiring condition, a closed-contact miswiring condition, an operational failure condition, and a need for external testing condition. A power supply is electrically connected between the load ends of the phase and neutral contacts, and to the timing signal generator.

    Shock hazard protection system
    6.
    发明授权
    Shock hazard protection system 失效
    冲击危害保护系统

    公开(公告)号:US5801912A

    公开(公告)日:1998-09-01

    申请号:US726252

    申请日:1996-10-04

    IPC分类号: H01H83/02 H02H5/08 H02H3/00

    摘要: The present invention teaches a new and novel system for protecting people and property against electrical shock. The invention includes a number of preferred and other embodiments which have this as their goal, but which represent a number of distinctive and novel approaches to solving prior art problems. By way of example only, and without limiting the scope of this invention, these approaches include novel immersion detecting circuits, broken wire test circuits, electromechanical circuit breaking including coil/plunger arrangements, and relay circuit breaking mechanisms cooperative with associated circuitry, all of which are able to be incorporated as a system wholly within the load (appliance) and its associated cord set (including a "plug").

    摘要翻译: 本发明教导了一种新的和新颖的保护人和物理免受电击的系统。 本发明包括许多优选的和其他具有这些作为其目标但是代表解决现有技术问题的许多独特且新颖的方法的实施例。 仅作为示例,并且在不限制本发明的范围的情况下,这些方法包括新颖的浸没检测电路,断线测试电路,包括线圈/柱塞装置的机电断路和与相关电路协作的继电器断路机构,所有这些 能够作为完全在负载(器具)及其相关的电线组(包括“插头”)内的系统并入。

    Ground fault circuit interrupter incorporating miswiring prevention
circuitry

    公开(公告)号:US5477412A

    公开(公告)日:1995-12-19

    申请号:US89149

    申请日:1993-07-08

    IPC分类号: H02H3/04 H02H3/33 H02H3/28

    CPC分类号: H02H3/338 H02H3/04

    摘要: A ground fault circuit interrupter (GFCI) with built in intelligence is described that includes circuitry to automatically indicate a device miswiring condition. When a GFCI is wired with its AC and LOAD terminals reversed, downstream devices are still protected in the event of a ground fault but the duplex receptacle on the GFCI itself is not. The invention incorporates miswiring sense circuitry that automatically triggers the generation of visual and audible alarms in the event a miswiring condition is sensed. The invention employs an alarm inhibiting technique that incorporates sense circuitry connected to the AC terminals on one side of the internal GFCI switches or relays and alarm generation circuitry connected to the LOAD terminals on the opposite side.

    Time responsive variable voltage power supply
    8.
    发明授权
    Time responsive variable voltage power supply 失效
    时间响应可变电压电源

    公开(公告)号:US4396869A

    公开(公告)日:1983-08-02

    申请号:US183592

    申请日:1980-08-27

    IPC分类号: H02M5/257 H05B37/02

    CPC分类号: H02M5/2576

    摘要: A variable voltage power supply includes a switching device through which line AC current is passed in response to the time during which a level setting voltage is applied to a control circuit for the switching device. During the duration of the level setting signal, periodic electrical signals are applied to a counter which is cyclicly incremented and decremented between predetermined lower and upper count limits until the level setting signal is terminated. The count is used as a measure of time into each half cycle of the line AC voltage at which the switch device is closed, the switch device being opened in response to the zero voltage crossing at the end of each half cycle of the AC voltage.

    摘要翻译: 可变电压电源包括响应于电平设定电压被施加到开关装置的控制电路的时间,线路AC电流通过的开关装置。 在电平设定信号的持续时间期间,周期性电信号被施加到计数器,该计数器在预定的下限和上限计数限制之间循环递增和递减,直到电平设置信号终止。 该计数用作测量开关器件闭合的线路AC电压的每个半周期内的时间,开关器件响应于在交流电压的每个半周期结束时的零电压交叉而断开。

    Ground fault circuit interrupter incorporating miswiring prevention circuitry
    9.
    发明授权
    Ground fault circuit interrupter incorporating miswiring prevention circuitry 有权
    接地故障电路中断器结合防抱死线路

    公开(公告)号:US06226161B1

    公开(公告)日:2001-05-01

    申请号:US09370352

    申请日:1999-08-09

    IPC分类号: H02H316

    CPC分类号: H02H3/338 H02H3/04

    摘要: A ground fault circuit interrupter (GFCI) with built in intelligence is described that includes circuitry to automatically indicate a device miswiring condition. When a GFCI is wired with its AC and LOAD terminals reversed, downstream devices are still protected in the event of a ground fault but the duplex receptacle on the GFCI itself is not. The invention incorporates miswiring sense circuitry that automatically triggers the generation of visual and audible alarms in the event a miswiring condition is sensed. The invention employs an alarm inhibiting technique that incorporates sense circuitry connected to the AC terminals on one side of the internal GFCI switches or relays and alarm generation circuitry connected to the LOAD terminals on the opposite side.

    摘要翻译: 描述了具有内置智能的接地故障电路断路器(GFCI),其包括自动指示设备接线状况的电路。 当GFCI与其AC和LOAD端子相连接时,下游设备在接地故障的情况下仍然受到保护,但GFCI本身的双工插座不受保护。 本发明包括误接线感测电路,其在感测到接线不良情况的情况下自动触发视觉和听觉报警的产生。 本发明采用报警抑制技术,其包括连接到内部GFCI开关或继电器一侧上的AC端子的感测电路和连接到相对侧上的LOAD端子的报警产生电路。

    Shock hazard protection system
    10.
    发明授权
    Shock hazard protection system 失效
    冲击危害保护系统

    公开(公告)号:US5402298A

    公开(公告)日:1995-03-28

    申请号:US138889

    申请日:1993-10-19

    IPC分类号: H01H83/02 H02H5/08 H02H3/16

    摘要: The present invention teaches a new and novel system for protecting people and property against electrical shock. The invention includes a number of preferred and other embodiments which have this as their goal, but which represent a number of distinctive and novel approaches to solving prior art problems. By way of example only, and without limiting the scope of this invention, these approaches include novel immersion detecting circuits, broken wire test circuits, electromechanical circuit breaking means including coil/plunger arrangements, and relay circuit breaking mechanisms cooperative with associated circuitry, all of which are able to be incorporated as a system wholly within the load (appliance) and its associated cord set (including a "plug").

    摘要翻译: 本发明教导了一种新的和新颖的保护人和物理免受电击的系统。 本发明包括许多优选的和其他具有这些作为其目标但是代表解决现有技术问题的许多独特且新颖的方法的实施例。 仅作为示例,并且在不限制本发明的范围的情况下,这些方法包括新颖的浸没检测电路,断线测试电路,包括线圈/柱塞装置的机电断路装置和与相关电路协作的继电器断路机构 其能够作为完全在负载(器具)及其相关联的电线组(包括“插头”)内的系统并入。