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    1.
    发明专利
    未知

    公开(公告)号：DE19702094B4

    公开(公告)日：2008-01-24

    申请号：DE19702094

    申请日：1997-01-22

    Applicant: ABB RESEARCH LTD

    Inventor： DULLNI EDGAR ,  GLATZ-REICHENBACH JOACHIM ,  KUHLEFELT JAN ,  LOITZL RUZICA ,  PELANEK ZDENEK ,  SKINDHOEJ JOERGEN ,  STRUEMPLER RALPH

    IPC: H01H33/16 ,  H02H3/02 ,  H02H3/08 ,  H02H9/02

    Abstract: A power switching apparatus is disclosed which has an electrical conductor to which high voltage can be applied. A series of circuits formed by a switching point and a current-limiting element which contains PTC thermistors and varistors is arranged in the cable run of the electrical conductor. An apparatus for operating the switching point interacts with the current-limiting element. The current-limiting element has n (where n is a natural number greater than 1) series-connected parallel circuits each having at least one PTC thermistor and at least one varistor connected in parallel with it. A current sensor arranged in the cable run of the electrical conductor or those connections of one of the PTC thermistors and of the varistor connected in parallel with it which are interconnected at two junction points in one of the parallel circuits are operatively connected to the input of the operating apparatus. Such a power switching apparatus is designed using economic components, such as PTC thermistors and varistors for low-voltage applications, and a switching device which is designed for switching only low currents and can effectively limit large and small short-circuit currents without the current-limiting element connected upstream of the switching device, and/or the switching device, being overloaded.

    2.
    发明专利
    未知

    公开(公告)号：AT352849T

    公开(公告)日：2007-02-15

    申请号：AT01921094

    申请日：2001-04-24

    Applicant: ABB RESEARCH LTD

    Inventor： STRUEMPLER RALF ,  LOITZL-JELENIC RUZICA ,  GLATZ-REICHENBACH JOACHIM

    IPC: H01C7/02 ,  H01C7/12 ,  H01C17/00

    Abstract: The invention relates to a novel method of producing a resistor device comprising a PTC-polymer element 2 and a varistor element 4. Both elements are moulded in a common moulding process using one common mould. Preferred is co-injection moulding. The invention further relates to the resistor device thus produced and a current limit means including this resistor device and a switch (fig. 4).

    3.
    发明专利
    未知

    公开(公告)号：AT326016T

    公开(公告)日：2006-06-15

    申请号：AT02774239

    申请日：2002-11-18

    Applicant: ABB RESEARCH LTD

    Inventor： STRUEMPLER RALF ,  GLATZ-REICHENBACH JOACHIM

    IPC: G01R13/40 ,  G01R19/155

    Abstract: The invention is concerned with a binary voltage indicator for use with high- or medium voltage equipment. The indicator comprises a photoactive layer (5) which changes its reflectivity or emissivity when subjected to an electric field and which is applied directly onto the surface of a conductor. The photoactive layer is based on materials as used for low-voltage displays, such as electrophoretic films.

    8.
    发明专利
    未知

    公开(公告)号：DE60211373T2

    公开(公告)日：2007-02-08

    申请号：DE60211373

    申请日：2002-11-18

    Applicant: ABB RESEARCH LTD

    Inventor： STRUEMPLER RALF ,  GLATZ-REICHENBACH JOACHIM

    IPC: G01R19/155 ,  G01R13/40

    Abstract: The invention is concerned with a binary voltage indicator for use with high- or medium voltage equipment. The indicator comprises a photoactive layer (5) which changes its reflectivity or emissivity when subjected to an electric field and which is applied directly onto the surface of a conductor. The photoactive layer is based on materials as used for low-voltage displays, such as electrophoretic films.

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