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6 条记录 (耗时 0.014 秒)

    Integrated circuit linear time delay extender for static relays
    2.
    发明授权
    Integrated circuit linear time delay extender for static relays 失效
    用于静态继电器的集成电路线性延时延长器

    公开(公告)号：US3970899A

    公开(公告)日：1976-07-20

    申请号：US546622

    申请日：1975-02-03

    申请人： Lee A. Davis

    发明人： Lee A. Davis

    IPC分类号： H02H3/093 ,  H02H3/08

    CPC分类号： H02H3/093

    摘要： A static relay utilizing a resistance-capacitance network to provide a current-time characteristic which has an inverse relationship for appropriately controlling protective operations in power transmission and distribution networks. An integrated dual-threshold and clamp circuit is employed in the static relay to adjustably control the time delay characteristic of the network over a range of several orders of magnitude without altering the time delay wave shape or requiring matched components and incorporates linear time setting means to facilitate adjustment and usage of the static relay.

    摘要翻译： 一种利用电阻 - 电容网络的静态继电器，以提供与电力传输和配电网络中的保护操作适当控制成反比关系的电流 - 时间特性。 在静态继电器中采用集成的双阈值和钳位电路，以在几个数量级的范围内可调节地控制网络的延时特性，而不改变时间延迟波形或需要匹配的组件，并且将线性时间设置装置 方便调整和使用静态继电器。

    Electronic overcurrent detection and tripping circuit
    3.
    发明授权
    Electronic overcurrent detection and tripping circuit 失效
    电子过电流检测和跳闸电路

    公开(公告)号：US4250532A

    公开(公告)日：1981-02-10

    申请号：US11388

    申请日：1979-02-12

    申请人： Lee A. Davis

    发明人： Lee A. Davis

    IPC分类号： H02H1/06 ,  H02H3/04 ,  H02H3/093 ,  H02H3/10 ,  H02H3/08

    CPC分类号： H02H3/044 ,  H02H1/063 ,  H02H3/093 ,  H02H3/105

    摘要： An electronic overcurrent detection and tripping circuit for circuit breakers is disclosed. The circuit includes an instantaneous trip circuit, a short time delay trip circuit, a long time delay trip circuit and a ground trip circuit. Each of the circuits is provided with adjustable ranges which can be set by suitable tap blocks or the like. A novel power supply is provided for the circuit which incorporates a unique series-connected zener diode and sensing resistor. The power supply circuit also provides sufficient power for tripping a magnetic latch of the circuit breaker whose current is being monitored. Each of the circuit functions can be disabled for purposes of tests by simply placing the function tap block pin in an appropriate test position.

    摘要翻译： 公开了一种用于断路器的电子过电流检测和跳闸电路。 该电路包括瞬时跳闸电路，短时间延迟跳闸电路，长时间延迟跳闸电路和接地跳闸电路。 每个电路都具有可由适当的抽头块等设置的可调范围。 为电路提供了一种新颖的电源，该电路采用独特的串联连接的齐纳二极管和感测电阻。 电源电路还提供足够的电力来跳闸正在监视其电流的断路器的磁性闩锁。 通过简单地将功能分接开关销置于适当的测试位置，可以禁止每个电路功能用于测试。

    Self-powered ammeter
    4.
    发明授权
    Self-powered ammeter 失效
    自供电电流表

    公开(公告)号：US4422039A

    公开(公告)日：1983-12-20

    申请号：US256998

    申请日：1981-04-24

    申请人： Lee A. Davis

    发明人： Lee A. Davis

    IPC分类号： G01R1/20 ,  G01R19/25 ,  G01R19/22

    CPC分类号： G01R19/25 ,  G01R1/20

    摘要： A self-powered ammeter is disclosed. A metering circuit receives an a-c current to be tested and then generates a d-c voltage whose magnitude is proportional thereto. A display circuit receives the d-c metered voltage and provides a visual indication of the magnitude of the measured current. The current to be measured also drives a current transformer which, in turn, has an output burden circuit which produces a regulated power supply for the metering and display circuit components.

    摘要翻译： 公开了一种自供电的电流表。 计量电路接收要测试的a-c电流，然后产生幅度与其成比例的d-c电压。 显示电路接收d-c计量电压，并提供所测量电流大小的视觉指示。 要测量的电流还驱动电流互感器，电流互感器又具有产生用于计量和显示电路部件的稳定电源的输出负载电路。

    Target reset mechanism
    5.
    发明授权
    Target reset mechanism 失效
    目标复位机制

    公开(公告)号：US3964008A

    公开(公告)日：1976-06-15

    申请号：US546626

    申请日：1975-02-03

    申请人： Lee A. Davis

    发明人： Lee A. Davis

    IPC分类号： G01R19/145 ,  G08B5/26 ,  H01H85/38

    CPC分类号： G01R19/145 ,  G08B5/26

    摘要： A magnetic mechanism for resetting a magnetic target device by reversing the direction of flux in the device yoke without requiring the energization of an electrical reset circuit. A pivotable member is provided to hold the target reset mechanism captive in a position spaced from the target mechanism when the reset mechanism is not in use.