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    POLYMER CONCRETE ELECTRICAL INSULATION SYSTEM
    52.
    发明专利
    POLYMER CONCRETE ELECTRICAL INSULATION SYSTEM 未知

    公开(公告)号：CA2701333A1

    公开(公告)日：2009-04-16

    申请号：CA2701333

    申请日：2007-10-08

    Applicant: ABB RESEARCH LTD

    Inventor： CLIFFORD STEPHEN ,  SOYEUX FAUSTINE ,  KRIVDA ANDREJ ,  TILLIETTE VINCENT ,  ZANT NIKOLAUS ,  SINGH BANDEEP ,  GREUTER FELIX ,  RITZER LEOPOLD

    IPC: H01B3/40 ,  C08K3/36 ,  C08L63/00

    Abstract: Polymer concrete electrical insulation system comprising a hardened epoxy resin composition filled with an electrically non-conductive inorganic filler composition, wherein said polymer concrete electrical insulation system optionally may contain further additives, and wherein (a) the epoxy resin composition is based on a cycloaliphatic epoxy resin; (b) the inorganic filler composition is present within the range of about 76 % by weight to about 86 % by weight, calculated to the total weight of the polymer concrete electrical insulation system; (c) the inorganic filler composition comprises a uniform mixture of (i) an inorganic filler with an average grain size within the range of 1 micron (µm) to 100 micron (µm) [component c(i)], and (ii) an inorganic filler with an average grain size within the range of 0.1 mm (100 micron) to 2 mm [component c(ii)]; wherein (d) the inorganic filler with an average grain size within the range of 1 micron (µm) to 100 micron (µm) [component c(i)] is present in an amount within the range of 22 % to 42 %, calculated to the total weight of the polymer concrete electrical insulation system; and (e) the inorganic filler with an average grain size within the range of 0.1 mm to 2 mm [component c(ii)] is present within the range of 41 % to 61 % by weight, calculated to the total weight of the polymer concrete electrical insulation system; and method of producing said electrical insulation system.

    Non-linear resistance with varistor behaviour and method for the production thereof
    57.
    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.

    NON-LINEAR RHEOSTAT OF LAMELLAR PARAMETERS AND METHOD OF MAKING SAME
    59.
    发明专利
    NON-LINEAR RHEOSTAT OF LAMELLAR PARAMETERS AND METHOD OF MAKING SAME 未知

    公开(公告)号：PL337696A1

    公开(公告)日：2000-08-28

    申请号：PL33769699

    申请日：1999-04-23

    Applicant: ABB RESEARCH LTD

    Inventor： KLUGE-WEISS PETER ,  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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