公开(公告)号：NO20074246L

公开(公告)日：2007-10-22

申请号：NO20074246

申请日：2007-08-20

Applicant: ABB RESEARCH LTD

Inventor： NIAYESH KAVEH ,  BERTH MATTHIAS ,  DAHLQUIST ANDREAS ,  HEITZ CHRISTOPH ,  TIBERG MARTIN

IPC: G01R27/28

Abstract: A method and device for determining the linear response of an electrical multi-port component (1) has an "estimation procedure" in which an estimated admittance matrix is determined by applying voltages to the ports of the component and measuring the response of the component. The estimation procedure can e.g. consist of a conventional measurement of the admittance matrix. The method further has a "measurement procedure" in which several voltage patterns are applied to the port. The voltage patterns correspond to the eigenvectors of the estimated admittance matrix. For each applied voltage pattern, the response of the component is measured. This allows to measure the linear response of the component accurately even if the eigenvalues of the admittance matrix differ by several orders of magnitude.

公开(公告)号：DE50014444D1

公开(公告)日：2007-08-09

申请号：DE50014444

申请日：2000-04-11

Applicant: ABB RESEARCH LTD

Inventor： HEITZ CHRISTOPH ,  PIEMONTESI MARCO ,  NIEMEYER LUTZ

IPC: H01B17/14 ,  H01B17/42

Abstract: The electrical insulator has an insulator body 3 which is fitted between an electrical conductor 1 and a grounded holder 2 . The surface of the insulator is at least partially formed by a protective body 6 . The material of the protective body has a low dielectric constant in comparison to that of the material of the insulator body 3 . The protective body 6 prevents an electrically conductive particle 12 from coming to rest directly on the surface of the insulator body 3 , in particular in the region of the triple points T, or causing a considerable increase in the field due to immediate proximity to the insulator body 3. The breakdown voltage of a gas-insulated system which contains such insulators provided with a protective body is increased. Gas-insulated systems can thus be made more compactly and more cheaply, and their life can be extended.

公开(公告)号：AU780289B2

公开(公告)日：2005-03-17

申请号：AU6361201

申请日：2001-08-23

Applicant: ABB RESEARCH LTD

Inventor： PIEMONTESI MARCO ,  SALGE GERHARD ,  HEITZ CHRISTOPH ,  MEINECKE HERBERT ,  SOLOGUREN-SANCHEZ DIEGO

IPC: H02B13/02 ,  H01B17/00 ,  H01H31/32 ,  H01H33/24 ,  H01H33/56 ,  H01H33/64

Abstract: The disconnector essentially comprises two isolating contacts (2), which are arranged in electrically conductive encapsulation (1) filled with insulating gas, and an isolating contact finger (3) arranged such that it can be moved between them. An insulation coating (7) is applied to the inside of the encapsulation (1) and has projections (8) pointing inward.The insulation coating prevents a disconnector spark (5), whose production cannot be avoided when the disconnector is opened, from flashing over onto the encapsulation (1). Furthermore, additional projections (9) prevent the spark from propagating in the direction of the isolating contacts (2).

公开(公告)号：DE19950110A1

公开(公告)日：2001-04-19

申请号：DE19950110

申请日：1999-10-18

Applicant: ABB RESEARCH LTD

Inventor： HEITZ CHRISTOPH ,  PIEMONTESI MARCO

IPC: H01B17/14 ,  H01B17/18 ,  H01B3/00 ,  H01B17/50

Abstract: The supporting insulator has an insulating body (3) and at least one protective body (6) at least partly forming the surface of the insulator. The protective body contains a material with a lower dielectric constant than the material of the insulating body and/or has a structure with a lower mean dielectric constant than the material of the insulating body.

公开(公告)号：DE19842726A1

公开(公告)日：2000-03-23

申请号：DE19842726

申请日：1998-09-18

Applicant: ABB RESEARCH LTD

Inventor： HEITZ CHRISTOPH ,  PIEMONTESI MARCO

IPC: H02G5/06 ,  H01B9/06 ,  H01B13/00

Abstract: Gas insulated conductor cable (1) has an inner cable (4) for a high voltage current and a mantle pipe (2) filled with an insulation gas. Supporting insulators (3) hold the inner conductor cable (4) centrally from the inner surfaces of the mantle. The mantle pipe (2) is of a material with distortion for a recess to be formed in the mantle surface, to be filled by a collar or covered by an elastomer hose (9) for the insulator support points.