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    1.
    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
    2.
    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.

    3.
    发明专利
    未知

    公开(公告)号：DE19824104B4

    公开(公告)日：2009-12-24

    申请号：DE19824104

    申请日：1998-04-27

    Applicant: ABB RESEARCH LTD

    Inventor： KLUGE-WEISS PETRA ,  GREUTER FELIX ,  STRUEMPLER RALF

    IPC: H01C7/10 ,  H01B1/20 ,  H01C7/112 ,  H01C7/12

    Abstract: The nonlinear resistor has varistor behaviour and has a matrix and a filler in powder form which is embedded in the matrix. The filler contains sintered varistor granules with predominantly spherical particles of doped metal oxide. These particles are made up of crystalline grains separated from one another by grain boundaries. The filler also contains electrically conductive particles, which cover at most a part of the surfaces of the spherical particles, and/or the varistor granules contain two fractions of particles with different sizes, of which the particles in the first fraction have larger diameters than the particles in the second fraction and are arranged essentially in the form of close sphere packing and the particles in the second fraction fill the interstices formed by the sphere packing.The resistor can be produced straightforwardly and cost-effectively and is distinguished by a high nonlinearity coefficient, which is desired for a good protection characteristic, and by a high power acceptance.

    5.
    发明专利
    未知

    公开(公告)号：AT303652T

    公开(公告)日：2005-09-15

    申请号：AT99915429

    申请日：1999-04-23

    Applicant: ABB RESEARCH LTD

    Inventor： KLUGE-WEISS PETRA ,  GREUTER FELIX ,  STRUEMPLER RALF

    IPC: H01C7/10 ,  H01C7/112 ,  H01C7/12

    Abstract: The nonlinear resistor has varistor behaviour and has a matrix and a filler in powder form which is embedded in the matrix. The filler contains sintered varistor granules with predominantly spherical particles of doped metal oxide. These particles are made up of crystalline grains separated from one another by grain boundaries. The filler also contains electrically conductive particles, which cover at most a part of the surfaces of the spherical particles, and/or the varistor granules contain two fractions of particles with different sizes, of which the particles in the first fraction have larger diameters than the particles in the second fraction and are arranged essentially in the form of close sphere packing and the particles in the second fraction fill the interstices formed by the sphere packing.The resistor can be produced straightforwardly and cost-effectively and is distinguished by a high nonlinearity coefficient, which is desired for a good protection characteristic, and by a high power acceptance.

    Non-linear resistance with varistor behaviour and method for the production thereof
    6.
    发明专利
    Non-linear resistance with varistor behaviour and method for the production thereof 未知

    公开(公告)号：AU3404399A

    公开(公告)日：1999-11-16

    申请号：AU3404399

    申请日：1999-04-23

    Applicant: ABB RESEARCH LTD

    Inventor： KLUGE-WEISS PETRA ,  GREUTER FELIX ,  STRUEMPLER RALF

    IPC: H01C7/10 ,  H01C7/112 ,  H01C7/12

    Abstract: The nonlinear resistor has varistor behaviour and has a matrix and a filler in powder form which is embedded in the matrix. The filler contains sintered varistor granules with predominantly spherical particles of doped metal oxide. These particles are made up of crystalline grains separated from one another by grain boundaries. The filler also contains electrically conductive particles, which cover at most a part of the surfaces of the spherical particles, and/or the varistor granules contain two fractions of particles with different sizes, of which the particles in the first fraction have larger diameters than the particles in the second fraction and are arranged essentially in the form of close sphere packing and the particles in the second fraction fill the interstices formed by the sphere packing.The resistor can be produced straightforwardly and cost-effectively and is distinguished by a high nonlinearity coefficient, which is desired for a good protection characteristic, and by a high power acceptance.

    Non-linear resistance with varistor behaviour and method for the production thereof
    8.
    发明专利
    Non-linear resistance with varistor behaviour and method for the production thereof 未知

    公开(公告)号：AU751978B2

    公开(公告)日：2002-09-05

    申请号：AU3404399

    申请日：1999-04-23

    Applicant: ABB RESEARCH LTD

    Inventor： KLUGE-WEISS PETRA ,  GREUTER FELIX ,  STRUEMPLER RALF

    IPC: H01C7/10 ,  H01C7/112 ,  H01C7/12

    Abstract: The nonlinear resistor has varistor behaviour and has a matrix and a filler in powder form which is embedded in the matrix. The filler contains sintered varistor granules with predominantly spherical particles of doped metal oxide. These particles are made up of crystalline grains separated from one another by grain boundaries. The filler also contains electrically conductive particles, which cover at most a part of the surfaces of the spherical particles, and/or the varistor granules contain two fractions of particles with different sizes, of which the particles in the first fraction have larger diameters than the particles in the second fraction and are arranged essentially in the form of close sphere packing and the particles in the second fraction fill the interstices formed by the sphere packing.The resistor can be produced straightforwardly and cost-effectively and is distinguished by a high nonlinearity coefficient, which is desired for a good protection characteristic, and by a high power acceptance.

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