Bushing With Current Transformers Patents (Class 174/DIG10)
  • Patent number: 5623125
    Abstract: A post-mounted device for mounting over an electrical transformer output post extends through an orifice in a wall of the electrical transformer with the post-mounted device having a body positioned on a first side of the wall and a cover positioned on a second side of the wall, with fasteners used to clamp the wall between the body and the cover. The post-mounted device includes a portion that restricts pivotal motion of the cover relative to the wall and a gasket provided in this portion seals the cover against the wall. The cover also includes a stepped cylindrical opening at an end of the cover opposite from the end of the cover that seals against the wall, with the stepped cylindrical opening containing a gasket in its smaller diameter portion for radially sealing against the output post, and a stepped spacer that is partially contained within the smaller diameter portion and partially contained within the larger diameter portion of the stepped cylindrical opening.
    Type: Grant
    Filed: April 21, 1995
    Date of Patent: April 22, 1997
    Assignee: Pioch
    Inventor: Olivier Pioch
  • Patent number: 5227584
    Abstract: The invention relates to a condenser type barrier for field control in transformer bushings and their connection to the conductor of a transformer winding for transformers used in HVDC converter plants. The condenser barrier is arranged as a solid of revolution with concentrically laid condenser layers. It is formed from both ends with inwardly-directed, straight frustums of cones with equally large smallest bases, between which the condenser barrier is formed as a concentric inner, straight circular cylinder.
    Type: Grant
    Filed: April 22, 1992
    Date of Patent: July 13, 1993
    Assignee: Asea Brown Boveri AB
    Inventors: Lars Holmstrom, Lennart Strandberg
  • Patent number: 4791247
    Abstract: An improved electrical bushing is disclosed which includes, in combination, an insulating body of a polyester material, a current-carrying stud, and an adhesive coating applied to the grooved peripheral surface of the stud. The bushing is manufactured by applying the adhesive coating to the peripheral surface of the stud. The polyester insulating body is then molded about the stud. Heast is applied to concurrently cure the polyester body and adhesive coating to achieve a bonded, fluid-tight seal between the stud and the insulating body.
    Type: Grant
    Filed: April 13, 1988
    Date of Patent: December 13, 1988
    Assignee: General Electric Company
    Inventors: Philip A. Cacalloro, Joseph A. St. Jacques
  • Patent number: 4670625
    Abstract: A bushing arrangement for conveying an electrical conductor through the casing of high voltage electrical apparatus exposed to the weather comprises a rigid member of synthetic resin cast around, so as to be bonded in a gas tight manner to, the conductor, and incorporating an exterior portion protruding outside the casing, the member being enclosed, over at least the major part of its exterior portion, by a plurality of insulting axially-overlapping weather-resistant collars and a stress cone each having a creepage flange or shed, the member being secured to the casing by a flanged collar. The insulating member may be made of a relatively cheap non-weather-resistant epoxy resin and the collars of EPDM rubber.
    Type: Grant
    Filed: July 16, 1986
    Date of Patent: June 2, 1987
    Inventors: Henry S. Wood, John L. Davenport
  • Patent number: 3974440
    Abstract: A measuring transformer for a fully-insulated, metal-clad, high-voltage installation equipped with a metal outer tube containing a high-voltage conductor includes a tube member arranged within the metal outer tube in surrounding relation to the high-voltage conductor. The tube member constitutes a surface-type electrode an conjointly defines with the high-voltage conductor a high-voltage capacitor. A low-voltage capacitor is connected to the high-voltage capacitor so as to conjointly define therewith a capacitive voltage divider. A transformer core unit including an iron core and a transformer winding system mounted on the iron core is also provided. The transformer core unit is arranged on the outer surface of the tube member whereby the tube member carries the transformer core unit inside the metal outer tube of the high-voltage installation.
    Type: Grant
    Filed: May 17, 1974
    Date of Patent: August 10, 1976
    Assignee: Siemens Aktiengesellschaft
    Inventors: Heinz Schiemann, Albert Herrmann, Gerhard Kleen
  • Patent number: 3943433
    Abstract: A measuring transformer arrangement is provided for a fluid-insulated high-voltage installation with metal encapsulation carrying several conductors. The measuring transformer arrangement includes at least one conducting or semiconducting tube surrounding each conductor whereat at least one current transformer core with a system of secondary windings mounted on it is attached on the outside of the tube. The tubes are connected with each other and are attached to the metal encapsulation.
    Type: Grant
    Filed: May 17, 1974
    Date of Patent: March 9, 1976
    Assignee: Siemens Aktiengesellschaft
    Inventors: Wolfgang Hermstein, Heinz Schiemann
  • Patent number: 3942099
    Abstract: A measuring transformer arrangement with a capacitor bushing and devices for measuring voltage and current associated with the capacitor bushing is suitable for use in a high-voltage installation with metal encapsulation carrying several high-voltage conductors. The capacitor bushing provided for each high-voltage conductor is arranged in a bulkhead partition of the metal encapsulation and carries a current measuring device which includes at the periphery of the bushing at least one current transformer core with a secondary winding system mounted thereon.
    Type: Grant
    Filed: May 17, 1974
    Date of Patent: March 2, 1976
    Assignee: Siemens Aktiengesellschaft
    Inventors: Hans-Joachim Freygang, Gabor Kovacs