Patents by Inventor Yong Cheol Kang

Yong Cheol Kang 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).

  • Method for detecting current transformer saturation
    Patent number: 6617839
    Abstract: Disclosed is a method for detecting saturation of a current transformer. The method determines whether or not a change of a secondary current generated in a current transformer is due to the saturation of the current transformer.
    Type: Grant
    Filed: August 23, 2002
    Date of Patent: September 9, 2003
    Inventors: Yong-Cheol Kang, Sang-Hee Kang, Seung-Hun Ok
  • Method for detecting current transformer saturation
    Publication number: 20030057939
    Abstract: Disclosed is a method for detecting saturation of a current transformer. The method determines whether or not a change of a secondary current generated in a current transformer is due to the saturation of the current transformer.
    Type: Application
    Filed: August 23, 2002
    Publication date: March 27, 2003
    Inventors: Yong-Cheol Kang, Sang-Hee Kang, Seung-Hun Ok
  • Relaying method for protecting transformers
    Publication number: 20030036821
    Abstract: The present invention relates to a relaying method using the ratio of induced voltages or the ratio of flux linkage increments. The protective relaying method for power transformers with one or more phases includes the first step of obtaining primary and secondary voltages and currents of the transformer; the second step of calculating induced voltages, induced voltage differences, ratio of primary and secondary induced voltages, or ratio of primary and secondary induced voltage differences from the currents and the voltages; the third step of calculating at least one predetermined decision parameter derived from at least one predetermined equation; the fourth step of deciding whether an internal winding fault occurs by comparing the decision parameter to the induced voltages, the induced voltage differences, the ratio of primary and secondary induced voltages, or the ratio of primary and secondary induced voltage differences.
    Type: Application
    Filed: October 23, 2001
    Publication date: February 20, 2003
    Inventors: Yong Cheol Kang, Sang Hee Kang, Byung Eun Lee, Jae Sung Yun, Seung Hun Ok