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    4.
    发明专利
    未知

    公开(公告)号：SE517814C2

    公开(公告)日：2002-07-16

    申请号：SE9904166

    申请日：1999-11-18

    Applicant: ABB AB

    Inventor： BACKMAN MAGNUS ,  NYGREN NOLEMO JAN-ANDERS ,  KJAER PHILIP ,  BALGAARD LENNART ,  SMEDE JAN ,  LARSSON PER ,  ALBERTSSON OVE ,  JOHANSSON JAN ,  FALAH AL-HOSINI ,  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.

    6.
    发明专利
    未知

    公开(公告)号：SE9904166D0

    公开(公告)日：1999-11-18

    申请号：SE9904166

    申请日：1999-11-18

    Applicant: ABB AB

    Inventor： BACKMAN MAGNUS ,  NYGREN JAN-ANDERS ,  KJAER PHILIP ,  BALGAARD LENNART ,  SMEDE JAN ,  LARSSON PER ,  LILJESTRAND LARS ,  FRANK HARRY ,  ALBERTSSON OVE

    IPC: H01H9/54 ,  H01H

    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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