Patents by Inventor Dag Andersson

Dag Andersson 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).

  • Voltage surge protection device and high voltage circuit breakers
    Patent number: 8817445
    Abstract: A voltage surge protection device for protection of a high voltage device includes a varistor having a first part and a second part separated by varistor material. The voltage surge protection device further includes an expandable member arranged to act on a movable electrical contact for short-circuiting the voltage surge protection device upon a threshold voltage being applied between the first part and the second part of the varistor. A high voltage circuit breakers includes one or more semiconductor devices connected in series and the voltage surge protection device connected in parallel thereto.
    Type: Grant
    Filed: June 27, 2011
    Date of Patent: August 26, 2014
    Assignee: ABB Technology AG
    Inventors: Jan Lundquist, Jürgen Häfner, Leif Sköld, Håkan Wieck, Dag Andersson
  • VOLTAGE SURGE PROTECTION DEVICE AND HIGH VOLTAGE CIRCUIT BREAKERS
    Publication number: 20140226244
    Abstract: A voltage surge protection device for protection of a high voltage device includes a varistor having a first part and a second part separated by varistor material. The voltage surge protection device further includes an expandable member arranged to act on a movable electrical contact for short-circuiting the voltage surge protection device upon a threshold voltage being applied between the first part and the second part of the varistor. A high voltage circuit breakers includes one or more semiconductor devices connected in series and the voltage surge protection device connected in parallel thereto.
    Type: Application
    Filed: June 27, 2011
    Publication date: August 14, 2014
    Applicant: ABB TECHNOLOGY AG
    Inventors: Jan Lundquist, Jürgen Häfner, Leif Sköld, Håkan Wieck, Dag Andersson
  • Circuit breaker
    Patent number: 8222556
    Abstract: A circuit breaker for high voltage applications, including: at least one breaking unit, a supporting insulator having one end on ground potential and the other end on high voltage potential, and the end on high voltage potential is mechanically connected to the breaking unit, and a fiber optic sensor for sensing the current through the breaking unit. The supporting insulator is removably connected to the breaking unit. The sensor has an optic fiber coil arranged in the high voltage end of the supporting insulator, and the circuit breaker includes a mechanism for conducting current from the breaking unit to the sensor so that the current passes through the sensor coil.
    Type: Grant
    Filed: June 26, 2009
    Date of Patent: July 17, 2012
    Assignee: ABB Technology Ltd.
    Inventors: Ulf Akesson, Dag Andersson, Leif Skold, Yngve Petersson
  • Circuit Breaker
    Publication number: 20090321392
    Abstract: A circuit breaker for high voltage applications, including: at least one breaking unit, a supporting insulator having one end on ground potential and the other end on high voltage potential, and the end on high voltage potential is mechanically connected to the breaking unit, and a fiber optic sensor for sensing the current through the breaking unit. The supporting insulator is removably connected to the breaking unit. The sensor has an optic fiber coil arranged in the high voltage end of the supporting insulator, and the circuit breaker includes a mechanism for conducting current from the breaking unit to the sensor so that the current passes through the sensor coil.
    Type: Application
    Filed: June 26, 2009
    Publication date: December 31, 2009
    Inventors: Ulf Akesson, Dag Andersson, Leif Skold, Yngve Petersson