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    12.
    发明专利
    未知

    公开(公告)号：AT403935T

    公开(公告)日：2008-08-15

    申请号：AT04405210

    申请日：2004-04-06

    Applicant: ABB RESEARCH LTD

    Inventor： GRAMESPACHER HANSJOERG ,  HAGEMEISTER MICHAEL ,  KLUGE-WEISS PETRA ,  GREUTER FELIX ,  DONZEL LISE ,  KESSLER RETO

    IPC: H01C7/10 ,  C04B14/04 ,  H01C7/00 ,  H01C7/112 ,  H01C17/065

    Abstract: The invention relates to a nonlinear electrical material with improved microvaristor filler (1'), to devices and electrical apparatuses comprising such nonlinear electrical material and to a production method thereof. According to invention, the filler (1') comprises larger spherical particles (5) and smaller irregular particles (6) that are arranged interstitially and provide non-point-like and/or multiple contact areas (56, 56a, 56b, 66) owing to their irregular outer shape comprising edges and faces. Embodiments, among other things, relate to: spherical particles (5) being calcinated and broken-up to retain their original shape; irregular, spikly shaped, particles (6) obtained by calcinating or sintering and crushing or fracturing granules or blocks; and addition of a third filler fraction. Advantages, among others, are: higher filler contents, more and more durable inter-particle contacts (56, 56a, 56b, 66), enlarged effective micro-contact area, and improved electrical performance of the nonlinear electrical material.

    HIGH VOLTAGE BUSHING
    16.
    发明专利
    HIGH VOLTAGE BUSHING 未知

    公开(公告)号：PL352125A1

    公开(公告)日：2003-07-28

    申请号：PL35212500

    申请日：2000-06-13

    Applicant: ABB RESEARCH LTD

    Inventor： GREUTER FELIX ,  CHRISTEN THOMAS ,  KLUGE-WEISS PETRA

    IPC: H02G15/06 ,  H02G1/14 ,  H02G15/064 ,  H02G15/072

    Abstract: The bushing has an electrical conductor (1) to which high voltage can be applied. One section of the electrical conductor (1) is surrounded by a varistor arrangement (9). The bushing also contains two electrical connections (4, 6), one (6) of which can be connected to high voltage and the other (4) can be connected to ground, a bushing insulator (5) provided between the electrical conductor (1) and the varistor arrangement (9), and a clamping apparatus (11) which applies a contact force to the electrical connections (4, 6) and to the varistor arrangement (9) located in between them like a sandwich. The clamping apparatus has an insulating part which applies the contact force to the two electrical connections. The bushing insulator is in the form of a molding and has a supporting element, provided with a guide surface, for a contact (1a) (which is connected to the electrical conductor (1)) in a plug connection to a cable or to an apparatus bushing of an electrical apparatus.

    17.
    发明专利
    未知

    公开(公告)号：BR9813683A

    公开(公告)日：2000-10-10

    申请号：BR9813683

    申请日：1998-12-16

    Applicant: ABB RESEARCH LTD

    Inventor： NYSVEEN ARNE ,  ROCHE SVEND ,  GREUTER FELIX ,  JOELKE ELIAS ,  RHYNER JAKOB

    IPC: H02G15/06 ,  H02G15/14 ,  H02G15/22 ,  H02G1/14

    Abstract: The present invention relates to a device for terminating cables (1), particularly for underwater termination of high voltage power cable and for conducting high voltage conductors in an electrical underwater apparatus, with the purpose of providing a liquid and water tight termination, at the same time as it provides pressure relief for vital components. According to this it is suggested that: each high voltage conductor (phase) (2a, 2b, 2c) is terminated in a separate, liquid filled and pressure compensated interior chamber (7a, 7b, 7c); conduction of the high voltage conductor from each interior chamber into attached electrical apparatus is carried out by means of a solid electrical conductor (10a, 10b, 10c), said conductor being fixed in an insulation material (11) which is liquid and gas tight, the solid electrical conductor and insulation material forming a gas and liquid tight barrier between the cable conductor and attached apparatus, and all interior chambers (7a, 7b, 7c) are adapted to a common, liquid filled and pressure compensated outer chamber (4).

    ELECTRICAL RESISTANCE ELEMENT AND USE OF THIS RESISTANCE ELEMENT IN A CURRENT LIMITER
    19.
    发明专利
    ELECTRICAL RESISTANCE ELEMENT AND USE OF THIS RESISTANCE ELEMENT IN A CURRENT LIMITER 未知

    公开(公告)号：CA2130622A1

    公开(公告)日：1995-02-26

    申请号：CA2130622

    申请日：1994-08-22

    Applicant: ABB RESEARCH LTD

    Inventor： BAIATU TUDOR ,  GREUTER FELIX ,  STRUEMPLER RALF

    IPC: H01C7/02 ,  H01C7/13 ,  H02H9/02

    Abstract: The electrical resistance element (10) includes a resistance body (3), which is arranged between two plane-parallel, pressurized electrodes (1, 2), has PTC behavior and comprise a polymer matrix and two filler components of electrically conducting particles embedded into the polymer matrix (4). When a short-circuit current occurs, the resistivity of the resistance body (3) changes abruptly above a temperature limit value in a surface layer resting on the electrodes and containing at least a first of the two filler components. A second of the two filler components is elected such that a composite material containing at least the polymer matrix and the second filler component has PTC behavior, with an abruptly changing behavior greater by at least one order of magnitude in comparison with the surface layer. At the same time, this composite material has a resistivity which is lower by at least one order of magnitude than a composite material formed by the polymer matrix and the first filler component. The resistance element has a high nominal current carrying capacity and can limit large shortcircuit currents permanently.

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