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61 条记录 (耗时 0.016 秒)

    METHOD AND DEVICE FOR CONTROLLING OPENING/CLOSING OF CIRCUIT BREAKER
    1.
    发明申请
    METHOD AND DEVICE FOR CONTROLLING OPENING/CLOSING OF CIRCUIT BREAKER 审中-公开

    公开(公告)号：US20190027917A1

    公开(公告)日：2019-01-24

    申请号：US16067397

    申请日：2016-12-23

    申请人： HYOSUNG HEAVY INDUSTRIES CORPORATION

    发明人： Young Jin KWON ,  Ki Ryang KWON

    IPC分类号： H02H3/02 ,  H01H33/59 ,  G01R19/175 ,  H02H3/353

    摘要： Provided is a method for controlling the opening/closing of a circuit breaker which includes include: a signal inputting step for receiving an input of a signal; a sign change detecting step for detecting a sign change of the signal; a zero crossing reference setting step for setting a zero crossing reference when there is the sign change; a one period integrated value comparing step for checking whether an absolute value of a one period integrated value obtained by integrating the signal for one period from the zero crossing reference exceeds a reference value; a detected phase comparing step for determining whether a detected phase is identical to a set phase; and a circuit breaker opening/closing step for controlling the opening/closing of a circuit breaker when the absolute value of the one period integrated value does not exceed the reference value and the detected phase is identical to the set phase.

    Fault detection circuit for use in determining the existence of a fault in any one of a plurality of DC loads
    2.
    发明授权
    Fault detection circuit for use in determining the existence of a fault in any one of a plurality of DC loads 失效
    故障检测电路用于确定多个DC负载中的任何一个中的故障的存在

    公开(公告)号：US5315256A

    公开(公告)日：1994-05-24

    申请号：US982398

    申请日：1992-11-27

    申请人： Martin Schuyler

    发明人： Martin Schuyler

    IPC分类号： H02H3/353 ,  G01R31/02

    CPC分类号： H02H3/353

    摘要： A fault detection circuit for a plurality of DC loads uses a reference load as a benchmark. The voltages at the centerpoints of the loads to be monitored are monitored and compared with the voltage of the centerpoint of the reference load. The comparison is affected by faults which do not affect all loads equally (as by a short or open) and is unaffected by faults which do affect all loads equally (as by changes in voltage of the source).

    摘要翻译： 用于多个DC负载的故障检测电路使用参考负载作为基准。 监测要监测的负载的中心点处的电压，并将其与参考负载的中心点的电压进行比较。 该比较受到不影响所有负载（如短路或开路）的故障的影响，并且不受同时影响所有负载的故障（如通过电源电压的变化）的影响。

    SAFETY TRIPPING DEVICE FOR A FRAME-TYPE ACB DRAWER SEAT
    7.
    发明申请
    SAFETY TRIPPING DEVICE FOR A FRAME-TYPE ACB DRAWER SEAT 审中-公开

    公开(公告)号：US20180144898A1

    公开(公告)日：2018-05-24

    申请号：US15700185

    申请日：2017-09-11

    申请人： Guizhou Taiyong Changzheng Technology Co., Ltd.

    发明人： Zhengqian HUANG ,  Kerang FENG ,  Yu'e ZENG

    IPC分类号： H01H71/52 ,  H02H3/353 ,  H01H71/12

    CPC分类号： H01H71/525 ,  H01H9/22 ,  H01H71/128 ,  H01H71/521 ,  H01H2071/249 ,  H02B11/133 ,  H02H3/353

    摘要： A safety tripping device for a frame-type ACB drawer seat, which includes a special gear, a first lever, a tension spring, a second lever, and a tripping shaft. The special gear includes the first rotation shaft and the first irregular convex flange feature. The irregular convex flange is lapped with a bending edge of one end of the first lever. The other end of the first lever is connected to the tension spring. An arc-shaped notch is provided at one end of the first lever which corresponds to the connecting spring. An arc-shaped protrusion matching the arc-shaped notch is provided at one end of the second lever. The arc-shaped protrusion engages with or separates from the arc-shaped notch to achieve the tripping operation. The frame-type ACB drawer seat according to the present invention is suitable for large-scale production applications.

    Three phase power monitor
    9.
    发明授权
    Three phase power monitor 失效
    三相电源监视器

    公开(公告)号：US5337206A

    公开(公告)日：1994-08-09

    申请号：US775540

    申请日：1991-10-15

    申请人： Andrew S. Kadah ,  Andrew M. Nguyen

    发明人： Andrew S. Kadah ,  Andrew M. Nguyen

    IPC分类号： H02H3/353 ,  H02H7/09 ,  H02H3/26 ,  H02H3/48

    CPC分类号： H02H7/09 ,  H02H3/353

    摘要： A three-phase power monitor operates a contactor between a supply of three phase electrical power and a three phase load. A phase integrity detector has three inputs connected respectively to the three phases of the electrical power. If a loss, reversal, or dissymmetry is detected, a photoemitting device is actuated. Actuation can also result from low or high line frequency. A power supply circuit is input with the three phases of power and has an output providing a dc level corresponding to the voltage level of the three-phase electrical power. A hold circuit has a first time constant associated with it and attains a hold level when current is applied to its input, but reverts to a release level after this current ceases. An interrogator circuit is coupled to the power supply and to the input of the hold circuit and provides a periodic recharge current to the hold circuit at a period that is shorter than the period of the hold circuit. A high/low voltage level detector interrupts the periodic recharge current if the dc level is outside a predetermined voltage limit. A photosensor-based discharge circuit is optically coupled to the photoemitting device of the three phase integrity detector, and is electrically coupled to the hold circuit for discharging the time constant circuit thereof if a phase loss or phase imbalance is detected.

    摘要翻译： 三相电力监控器在三相电力供应和三相负载之间操作接触器。 相位完整性检测器具有分别连接到电力的三相的三个输入端。 如果检测到损失，反转或不对称，则启动光发射装置。 驱动也可能由低或高线路频率引起。 电源电路以三相功率输入，并且具有提供与三相电力的电压电平对应的直流电平的输出。 保持电路具有与其相关联的第一时间常数，并且当电流施加到其输入时获得保持电平，但在该电流停止之后恢复到释放电平。 询问器电路被耦合到电源和保持电路的输入端，并且以比保持电路的周期短的周期向保持电路提供周期性的再充电电流。 如果直流电平超出预定电压极限，则高/低电平电平检测器中断周期性充电电流。 基于光电传感器的放电电路光耦合到三相完整性检测器的光发射装置，并且如果检测到相位损失或相位不平衡，则电耦合到保持电路，用于对其时间常数电路进行放电。

    Phase imbalance detection circuit
    10.
    发明授权
    Phase imbalance detection circuit 失效
    相位不平衡检测电路

    公开(公告)号：US4021703A

    公开(公告)日：1977-05-03

    申请号：US583219

    申请日：1975-06-02

    申请人： Wardell Gary ,  Glenn R. Taylor ,  Donald S. Kimmel

    发明人： Wardell Gary ,  Glenn R. Taylor ,  Donald S. Kimmel

    IPC分类号： H02H3/02 ,  H02H3/12 ,  H02H3/34 ,  H02H3/353

    CPC分类号： H02H3/34 ,  H02H3/353

    摘要： A phase imbalance logic module for a solid state motor protection system for a three-phase motor. Three-phase line currents are converted to corresponding voltages and rectified. The resultant output voltage is a poorly regulated DC voltage having a ripple of approximately 4% during normal operating conditions. In the event of a phase failure, even if not total, the corresponding ripple percentage increases. The phase imbalance logic network senses ripple and provides an output signal to trip a protective circuit breaker if the component of ripple becomes significantly large.

    摘要翻译： 用于三相电动机的固态电动机保护系统的相位不平衡逻辑模块。 三相线路电流转换为相应的电压并整流。 所得到的输出电压是在正常操作条件下具有约4％波动的调节不良的直流电压。 在相位故障的情况下，即使不是总计，相应的波动百分比也会增加。 相位不平衡逻辑网络检测纹波，并提供一个输出信号，以便在纹波分量变得非常大时跳闸保护断路器。