Patents by Inventor Cheoungjoon LEE

Cheoungjoon LEE 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).

  • Apparatus and method of preventing malfunction of circuit breaker in metal-clad and metal enclosed switchgear
    Patent number: 10720293
    Abstract: According to an embodiment of the present disclosure, an apparatus of preventing a malfunction of a circuit breaker may include a circuit breaker and a variable resistor installed on a distributing board, the variable resistor being disposed outside the circuit breaker separately from the circuit breaker, wherein the variable resistor is connected in parallel to an anti-pumping auxiliary relay RW, and total resistance of the anti-pumping auxiliary relay RW and the variable resistor connected in parallel to each other is less than resistance of the anti-pumping auxiliary relay RW.
    Type: Grant
    Filed: October 30, 2017
    Date of Patent: July 21, 2020
    Assignee: KEPCO ENGINEERING AND CONSTRUCTION COMPANY, INC.
    Inventor: Cheoungjoon Lee
  • APPARATUS AND METHOD OF PREVENTING MALFUNCTION OF CIRCUIT BREAKER IN METAL-CLAD AND METAL ENCLOSED SWITCHGEAR
    Publication number: 20180294119
    Abstract: According to an embodiment of the present disclosure, an apparatus of preventing a malfunction of a circuit breaker may include a circuit breaker and a variable resistor installed on a distributing board, the variable resistor being disposed outside the circuit breaker separately from the circuit breaker, wherein the variable resistor is connected in parallel to an anti-pumping auxiliary relay RW, and total resistance of the anti-pumping auxiliary relay RW and the variable resistor connected in parallel to each other is less than resistance of the anti-pumping auxiliary relay RW.
    Type: Application
    Filed: October 30, 2017
    Publication date: October 11, 2018
    Applicant: KEPCO ENGINEERING AND CONSTRUCTION COMPANY, INC.
    Inventor: Cheoungjoon LEE