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42 records (took 0.023 seconds)

    32.
    发明专利
    未知

    公开(公告)号：SE0002125D0

    公开(公告)日：2000-06-07

    申请号：SE0002125

    申请日：2000-06-07

    Applicant: ABB AB

    Inventor： LARSSON PER ,  BACKMAN MAGNUS ,  JONSSON LARS

    IPC: H01H33/59 ,  H01H9/56 ,  H01H33/00 ,  H01H

    Abstract: An apparatus ( 14 ) for detecting a zero-crossing of an alternating current after occurrence of a fault in a current path ( 2 ) for determining a suitable time for opening an electric switching device ( 2 ) arranged in the current path for breaking the current in the current path comprises members ( 15 ) adapted to detect the current in the current path. An arrangement ( 19 ) is adapted to calculate the dc-level of the current and the decay of the dc-level with time on the basis of values of the alternating current detected and also predict the time for a future zero-crossing of the alternating current on the basis of at least current values obtained through said current detection, the dc-level calculated, the dc-decay calculated and information about the period time of the alternating current.

    ROLL ARRANGEMENT
    33.
    发明专利
    ROLL ARRANGEMENT 未知

    公开(公告)号：CA2815715C

    公开(公告)日：2015-07-14

    申请号：CA2815715

    申请日：2011-10-24

    Applicant: ABB AB

    Inventor： INGVARSSON KJELL ,  LIFVENBORG ULF ,  JONSSON LARS ,  KIERSGAARD JESPER ,  GREFVE KENNETH ,  JOHANSSON JOAR

    IPC: B65H23/04

    Abstract: It is presented a roll arrangement (1) for determining a web tension profile of a web (W). The roll arrangement (1) comprises a roll (2) having a peripheral surface (3) for guiding the web (W), which peripheral surface (3) is provided with a plurality of openings (7), and a plurality of sensor arrangements (8; 8'). Each of the plurality of openings (7) are arranged to receive one sensor arrangement (8; 8') of the plurality of sensor arrangements (8; 8') to thereby sense forces applied by the web (W) to the roll (2). The roll arrangement (1) is adapted to suspend the sensor arrangements (6) in the respective opening (7).

    A method and an apparatus for controlling an electric switching device
    37.
    发明专利
    A method and an apparatus for controlling an electric switching device 未知

    公开(公告)号：AU6447901A

    公开(公告)日：2001-12-17

    申请号：AU6447901

    申请日：2001-06-07

    Applicant: ABB AB

    Inventor： LARSSON PER ,  BACKMAN MAGNUS ,  JONSSON LARS

    IPC: H01H33/59 ,  H01H9/54 ,  H01H9/56 ,  H01H33/00

    Abstract: An apparatus for controlling an electric switching device (1) for alternating current arranged in a current path for opening the switching device and for breaking the current in the current path after occurrence of a fault current comprises members (15) adapted to detect the current in the current path and a unit (20) adapted to control the electric switching device to break the current in the current path directly after a half wave of the alternating current having a peak value below a predetermined current limit value, so that the breaking is completed through a zero-crossing of the alternating current terminating a said half wave.

    An electric switching device
    39.
    发明专利
    An electric switching device 未知

    公开(公告)号：AU1566601A

    公开(公告)日：2001-05-30

    申请号：AU1566601

    申请日：2000-11-20

    Applicant: ABB AB

    Inventor： BACKMAN MAGNUS ,  NYGREN JAN-ANDERS ,  KJAER PHILIP ,  BALGARD LENNART ,  SMEDE JAN ,  LARSSON PER ,  ALBERTSSON OVE ,  JOHANSSON JAN ,  AL-HOSINI FALAH ,  JONSSON LARS

    IPC: H01H9/54

    Abstract: An electric switching device for alternating current comprises two branches ( 2, 3 ) connected in parallel in a current path and having each at least two contact members ( 4-7 ) connected in series. A semiconductor device ( 8 ) is adapted to interconnect the midpoints between the two contact members of each branch. When opening the current path a first contact member ( 5 ) of one, first branch located before said midpoint as seen in the current direction existing is controlled to open and a second contact member ( 6 ) of the second branch located after the midpoint as seen in the current direction is controlled to open for transferring the current to a temporary current path through the semiconductor device. The current path through the switching device is then broken when the semiconductor device is in a blocking state by opening a contact member ( 4, 7 ) of the switching device arranged in the temporary current path.

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