Patents Assigned to ABB Trasmissione & Distribuzione SpA
  • Gas-insulated switching device
    Patent number: 6444937
    Abstract: An interruption and disconnecting device for high or medium voltage applications including a disconnection chamber and an interruption pole having a casing that delimits a free volume accommodating an interruption chamber. The interruption chamber contains a moving contact and a fixed contact. The interruption pole and the disconnection chamber contain dielectrically insulating fluids. The interruption chamber is sealed with respect to a remaining part of the interruption pole.
    Type: Grant
    Filed: March 12, 2001
    Date of Patent: September 3, 2002
    Assignee: ABB Trasmissione & Distribuzione SpA
    Inventor: Costante Piazza