Adjustable Patents (Class 200/19.11)
  • Patent number: 7408275
    Abstract: Automatically changing the tap position in a load tap changer includes noting a polarity of a first tap position of a load tap changer. A duration for which one or more consecutive tap positions of the load tap changer collectively have had the noted polarity also is noted. The one or more consecutive tap positions include the first tap position. The duration for which the one or more consecutive tap positions collectively have had the noted polarity is compared to a threshold value. A change is made from the first tap position to a second tap position with a polarity that is different than the noted polarity when the duration for which the one or more consecutive tap positions collectively have had the noted polarity is longer than the threshold value. A change may be made from the second tap position back to the first tap position.
    Type: Grant
    Filed: December 23, 2004
    Date of Patent: August 5, 2008
    Assignee: Cooper Technologies Company
    Inventors: Augusto D. Hernandez, Jr., legal representative, Donald A. Down, Fred J. Rapant, Richard J. Kaluzny, Augusto D. Hernandez