Patents by Inventor Kristian Gustafsson
Kristian Gustafsson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Publication number: 20240170181Abstract: A profile wire conductor for an electric power cable, the profile wire conductor having a central longitudinal axis and including stranded individual profile wires arranged in concentric wire layers around the central longitudinal axis, the concentric wire layers including an inner wire layer of profile wires of a first type having a first radial cross sectional geometry, and an outermost wire layer of profile wires forming an outer surface of the profile wire conductor. At least one of the profile wires in the outermost wire layer being of a second type and having a second radial cross sectional geometry being different to the first radial cross sectional geometry, wherein the profile wires of the second type forms an indentation or protrusion in the outer surface of the profile wire conductor.Type: ApplicationFiled: November 16, 2023Publication date: May 23, 2024Inventors: Kristian Gustafsson, Tommy Johansson
-
Publication number: 20240079163Abstract: A method of building an insulation system around an axial section of a conductor of a power cable, the method including: a) providing a power cable including a conductor and an insulation system arranged around the conductor, the insulation system including insulation system layers, including an inner semiconducting layer arranged around the conductor, an insulation layer arranged around the inner semiconducting layer, and an outer semiconducting layer arranged around the insulation layer, wherein the power cable includes an axial section between a first insulation system section and a second insulation system section of the insulation system which at least is without an outer semiconducting layer, b) winding a tape around the conductor along the axial section in a plurality of layers to form a plurality of layers of tape connecting with the first insulation system section and the second insulation system section, and c) heating the plurality of layers of tape to melt and fuse the plurality of layers of tapeType: ApplicationFiled: September 6, 2023Publication date: March 7, 2024Inventors: Kristian Gustafsson, Jörn Antonischki, Tommy Johansson
-
Publication number: 20230420163Abstract: A method is disclosed for connecting a first and a second conductor for use in a prefabricated cable accessory. The method includes electrically connecting the first and second conductors by welding them together and filling a space between an outer surface of the welded conductor and an outer surface of a cable insulation of the first and second conductors by arranging a metal sleeve therebetween.Type: ApplicationFiled: June 21, 2023Publication date: December 28, 2023Inventors: Amirhossein Abbasi, Johan Jäderberg, Ola Hansson, Kristian Gustafsson
-
Publication number: 20230246449Abstract: An HVDC power cable joint assembly for jointing more than two power cables, including: a connection body including: a multi-branch conductor having at least two branches and a stem, a multi-branch conductor insulation system including: a connection body inner semiconducting layer arranged radially outside of the multi-branch conductor, a connection body insulation layer arranged radially outside the connection body inner semiconducting layer, a connection body outer semiconducting layer arranged radially outside the connection body insulation layer, N power cables, where N is the number of branches plus one, each power cable having a conductor, and a power cable insulation system surrounding the conductor, N power cable joints, each connecting a branch or the stem to a respective power cable, wherein each power cable joint includes: a conductor joint between one of the branches, or the stem, and a conductor of one of the power cables, a joint insulation system arranged around the conductor joint, the joint inType: ApplicationFiled: January 30, 2023Publication date: August 3, 2023Inventors: Kristian Gustafsson, Ola Hansson, Evripidis Karatsivos, Jörn Antonischki
-
Patent number: 11652327Abstract: A method for improving the properties of a joint between two cable ends having obtaining two cable ends, having uncovered conductors being joined in a connection zone, each cable end also including an uncovered insulation zone including uncovered insulation formed as a cone adjacent the uncovered conductor, covering the conductors with an additional insulation layer, measuring the additional insulation layer and the cones, determining the geometry of the cones and the additional insulation layer based on the measurements, determining a deviation of the geometry from a desired geometry of the cones and the additional insulation layer, where the desired geometry includes a smooth transition between two zones, determining, based on the deviation determination, material to be removed from the cones and the additional insulation layer achieving the desired geometry, and removing the material from the cones and the additional insulation layer.Type: GrantFiled: September 14, 2021Date of Patent: May 16, 2023Assignee: NKT HV Cables ABInventor: Kristian Gustafsson
-
Publication number: 20220415541Abstract: A heating assembly configured to receive a power cable for restoring an insulation system of the power cable, the heating assembly including: a central pressurisation and heating structure, and a first and second lateral structure provided at a respective axial end of the central pressurisation and heating structure, the first and second lateral structure each having at least a 20 cm long axially extending section primarily made of a material at most having a conductivity of the order of 1000 S/m at 20° C.Type: ApplicationFiled: June 24, 2022Publication date: December 29, 2022Inventors: Kristian Gustafsson, Jörn Antonischki
-
Publication number: 20220415543Abstract: A method of restoring an insulation system around a conductor of a power cable, using an induction heating system for heating the conductor of the power cable to restore an insulation system of the power cable, wherein the induction heating system includes: a first high frequency, HF, coil configured to receive the power cable, a water-cooling system configured to cool the first HF coil, and a power supply system configured to power the first HF coil, wherein the first HF coil is configured to be openable or splitable into at least two parts, the method including: a) placing a pressurisation and heating device around the power cable having a restoration insulation system layer arranged around the conductor, b) opening and placing the first HF coil around the power cable adjacent to the pressurisation and heating device, c) closing the first HF coil, and d) heating the restoration insulation system layer by outer heating of the restoration insulation system layer inside the pressurisation and heating device anType: ApplicationFiled: June 28, 2022Publication date: December 29, 2022Inventors: Kristian Gustafsson, Jörn Antonischki
-
Publication number: 20220415542Abstract: A pressurisation and heating device for restoring an insulation system of a power cable, the pressurisation and heating device including: a first part including a first channel configured to receive a portion of the power cable, a second part including a second channel configured to receive a portion of the power cable, wherein the pressurisation and heating device is configured to be set in a closed state in which the first channel faces the second channel thereby forming a heating chamber extending from a first end to a second end, opposite the first end, of the pressurisation and heating device, wherein the pressurisation and heating device is configured to be pressurised to obtain a pressure higher than atmospheric pressure inside the heating chamber when the power cable is arranged sealed in the heating chamber, wherein the pressurisation and heating device has an at least 20 cm long axially extending section which is primarily made of material at most having a conductivity of the order of moo S/m at 20°Type: ApplicationFiled: June 24, 2022Publication date: December 29, 2022Inventors: Kristian Gustafsson, Jörn Antonischki
-
Patent number: 11437166Abstract: A high voltage DC power cable designed for voltages of 320 kV or higher, including: a multi-wire conductor, an inner semiconducting layer arranged around the multi-wire conductor, the inner semiconducting layer forming a screen layer for the multi-wire conductor, a solid insulation system arranged around the inner semiconducting layer, and a water-blocking compound configured to restrict water migration into the high voltage DC power cable.Type: GrantFiled: May 20, 2020Date of Patent: September 6, 2022Assignee: NKT HV Cables ABInventors: Kristian Gustafsson, Amirhossein Abbasi, Tommy Johansson
-
Publication number: 20220208416Abstract: A high voltage DC power cable designed for voltages of 320 kV or higher, including: a multi-wire conductor, an inner semiconducting layer arranged around the multi-wire conductor, the inner semiconducting layer forming a screen layer for the multi-wire conductor, a solid insulation system arranged around the inner semiconducting layer, and a water-blocking compound configured to restrict water migration into the high voltage DC power cable.Type: ApplicationFiled: May 20, 2020Publication date: June 30, 2022Inventors: Kristian Gustafsson, Amirhossein Abbasi, Tommy Johansson
-
Publication number: 20210408748Abstract: A method for improving the properties of a joint between two cable ends having obtaining two cable ends, having uncovered conductors being joined in a connection zone, each cable end also including an uncovered insulation zone including uncovered insulation formed as a cone adjacent the uncovered conductor, covering the conductors with an additional insulation layer, measuring the additional insulation layer and the cones, determining the geometry of the cones and the additional insulation layer based on the measurements, determining a deviation of the geometry from a desired geometry of the cones and the additional insulation layer, where the desired geometry includes a smooth transition between two zones, determining, based on the deviation determination, material to be removed from the cones and the additional insulation layer achieving the desired geometry, and removing the material from the cones and the additional insulation layer.Type: ApplicationFiled: September 14, 2021Publication date: December 30, 2021Inventor: Kristian Gustafsson
-
Patent number: 11146032Abstract: A method for improving the properties of a joint between two cable ends having obtaining two cable ends, having uncovered conductors being joined in a connection zone, each cable end also including an uncovered insulation zone including uncovered insulation formed as a cone adjacent the uncovered conductor, covering the conductors with an additional insulation layer, measuring the additional insulation layer and the cones, determining the geometry of the cones and the additional insulation layer based on the measurements, determining a deviation of the geometry from a desired geometry of the cones and the additional insulation layer, where the desired geometry includes a smooth transition between two zones, determining, based on the deviation determination, material to be removed from the cones and the additional insulation layer achieving the desired geometry, and removing the material from the cones and the additional insulation layer.Type: GrantFiled: March 20, 2019Date of Patent: October 12, 2021Assignee: NKT HV Cables ABInventor: Kristian Gustafsson
-
Publication number: 20190305499Abstract: A method for improving the properties of a joint between two cable ends having obtaining two cable ends, having uncovered conductors being joined in a connection zone, each cable end also including an uncovered insulation zone including uncovered insulation formed as a cone adjacent the uncovered conductor, covering the conductors with an additional insulation layer, measuring the additional insulation layer and the cones, determining the geometry of the cones and the additional insulation layer based on the measurements, determining a deviation of the geometry from a desired geometry of the cones and the additional insulation layer, where the desired geometry includes a smooth transition between two zones, determining, based on the deviation determination, material to be removed from the cones and the additional insulation layer achieving the desired geometry, and removing the material from the cones and the additional insulation layer.Type: ApplicationFiled: March 20, 2019Publication date: October 3, 2019Inventor: Kristian Gustafsson
-
Patent number: 8632284Abstract: A device for machining an electrical cable having a cylindrical part and a conical part adjoining the cylindrical part. The device includes a fixture arranged to receive the cable and to hold the cable in a fixed position, the fixture defines an elongated space for accommodating the cable, a tool for removing material from the cable including at least one cutter, and rotational guiding means for guiding a first rotation of the cutter about a longitudinal axis of the space. The cutter is elongated and the longitudinal axis of the cutter is arranged inclined with respect to the longitudinal axis of the space so that the angle between the longitudinal axes of the cutter and the space is between 10 and 80 degrees. The device further includes drive means for providing a second rotation of the cutter about a rotational axis through the tool in order to cause the machining.Type: GrantFiled: October 11, 2012Date of Patent: January 21, 2014Assignee: ABB Technology AGInventors: Jorn Antonischki, Kristian Gustafsson
-
Publication number: 20130032011Abstract: A device for machining an electrical cable having a cylindrical part and a conical part adjoining the cylindrical part. The device includes a fixture arranged to receive the cable and to hold the cable in a fixed position, the fixture defines an elongated space for accommodating the cable, a tool for removing material from the cable including at least one cutter, and rotational guiding means for guiding a first rotation of the cutter about a longitudinal axis of the space. The cutter is elongated and the longitudinal axis of the cutter is arranged inclined with respect to the longitudinal axis of the space so that the angle between the longitudinal axes of the cutter and the space is between 10 and 80 degrees. The device further includes drive means for providing a second rotation of the cutter about a rotational axis through the tool in order to cause the machining.Type: ApplicationFiled: October 11, 2012Publication date: February 7, 2013Inventors: Jorn Antonischki, Kristian Gustafsson
-
Publication number: 20080113649Abstract: The security of a mobile station which is associated with a safety handling server is enhanced by routing, using a control unit in the mobile station, a data message according to a standardised transmission format sent from the safety handling server to a main safety handling application in the mobile station, and by applying, using the main safety handling application, a safety function on the mobile station according to security rules that are defined for the mobile station.Type: ApplicationFiled: November 30, 2006Publication date: May 15, 2008Inventors: Eduardo Ibacache, Kristian Gustafsson