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    CONTINUOUS UNINTERRUPTABLE AC GROUNDING SYSTEM FOR POWER SYSTEM PROTECTION
    6.
    发明公开
    CONTINUOUS UNINTERRUPTABLE AC GROUNDING SYSTEM FOR POWER SYSTEM PROTECTION 有权
    连续不间断交流电源接地系统的电力系统的保护

    公开(公告)号：EP2596565A2

    公开(公告)日：2013-05-29

    申请号：EP11748511.0

    申请日：2011-07-19

    申请人： Emprimus, LLC

    发明人： FAXVOG, Frederick, R. ,  JENSEN, Wallace ,  NORDLING, Gale ,  FUCHS, Greg ,  JACKSON, David, Blake ,  VOLKMANN, Terry, Lee ,  RUEHL, James, Nicholas ,  GROH, Brian

    IPC分类号： H02H9/00 ,  H02H3/00 ,  H02H3/52 ,  H02H7/04

    CPC分类号： H02H3/52 ,  H02H1/04 ,  H02H5/005 ,  H02H7/04 ,  Y10T307/625 ,  Y10T307/707 ,  Y10T307/735 ,  Y10T307/832

    摘要： A continuous grounding system for use in an alternating current system including a transformer is disclosed. The system includes a switch assembly connected between a transformer neutral of a transformer and a ground, the switch assembly having an open position and a closed position, the open position disrupting the path through the switch assembly between the electrical connection and the transformer neutral, and the closed position establishing a path connecting the electrical connection to the transformer neutral through the switch assembly, wherein in normal operation of the alternating current electrical device the switch assembly remains in a closed position. The system also includes a DC blocking component positioned in parallel with the switch assembly and connected between the transformer neutral and the ground. The system further includes a control circuit configured to control the switch assembly, the control circuit including a sensor configured to actuate the switch assembly to an open position upon detection of a predetermined harmonic signal threshold at one of the transformer phases or a predetermined threshold of DC current between the transformer neutral and ground.

    Protection circuit and method for an electromagnetic interference suppression system
    7.
    发明公开
    Protection circuit and method for an electromagnetic interference suppression system 失效
    保护电路和方法抑制系统的电磁干扰

    公开(公告)号：EP0795945A3

    公开(公告)日：1998-06-10

    申请号：EP97660018

    申请日：1997-02-20

    申请人： ABB CONTROL OY

    发明人： KIISKINEN ESKO

    IPC分类号： H02H3/08 ,  H02H3/52 ,  H02H5/10

    CPC分类号： H02H3/083 ,  H02H3/52 ,  H02H5/105 ,  Y10T307/297

    摘要： The present invention relates to protection circuit and method for the EMI/RFI suppression system (2) of such a five-conductor electrical system in which the neutral conductor (N) is provided with a bandstoptype filter circuit (2) for the suppression of a harmonic interference current component. According to the invention, on the neutral conductor (N) is placed a current transformer (CT) having over its secondary a resistive branch (R
    1 ), and in parallel therewith, a filter branch (5) comprising a bandpass filter (LC) tuned to the fundamental frequency of said neutral-conductor filter circuit (2) and said filter branch (5) having in series with said bandpass filter branch (LC) a switch element (4) suitable for short-circuiting said neutral-conductor filter circuit (2) when current in said filter branch (5) exceeds a preset upper limit level.

    Verfahren zur Überwachung wie Stillstands- und/oder Einrichtungsdrehzahlüberwachung eines Antriebs, insbesondere hochdynamischen Servoantriebs, sowie Lastrelais insbesondere zur Verwendung bei einem entsprechenden Verfahren
    8.
    发明公开
    Verfahren zur Überwachung wie Stillstands- und/oder Einrichtungsdrehzahlüberwachung eines Antriebs, insbesondere hochdynamischen Servoantriebs, sowie Lastrelais insbesondere zur Verwendung bei einem entsprechenden Verfahren 失效
    监测作为驱动的静止和/或设备的速度的监测，特别是高度动态的伺服驱动器和过载继电器，特别是用于使用在相应的方法的方法

    公开(公告)号：EP0770877A1

    公开(公告)日：1997-05-02

    申请号：EP96117059.4

    申请日：1996-10-24

    申请人： Elan Schaltelemente GmbH

    发明人： Krauskopf ,  Ziegler, Olaf

    IPC分类号： G01P13/04 ,  H02H3/52

    CPC分类号： H02H3/52 ,  G01P13/04

    摘要： Die Erfindung bezieht sich auf ein Verfahren zur Überwachung wie Stillstands- und/oder Einrichtdrehzahlüberwachung eines Antriebs, insbesondere hochdynamischen Servoantriebs, mit dem Fehler überaus schnell detektiert werden können. Hierzu wird vorgeschlagen, daß durch Analyse und/oder Vergleich der Strangströme und/oder -spannungen des Antriebs die Überwachung erfolgt.

    摘要翻译： 该方法涉及分析和/或使用电子负载的继电器具有绝缘栅双极型晶体管（IGBT）中的电流和电动机/或电压（M）的比较（22,24,26）从磁独立的变压器接收稳定的直流电压和 整流器（16,18,20）。 通过光耦合器（34），当它的LED（11）接收一个断开信号的光电晶体管（例如28）各栅极 - 发射极通路短路。 外导体电压的高频成分被滤出并集成。 在预定的时间积分与预先设定的值允许对驱动器的任何危险运动或静止反应相比。