Patents by Inventor Chul Bum JOO

Chul Bum JOO 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).

  • Earth leakage breaker having built-in trip module type circuit breaker
    Patent number: 11984284
    Abstract: Proposed is an earth leakage breaker having a built-in trip module type circuit breaker, which is installed at a line between a power supply and a load and has a trip module configured to cut the line off, the earth leakage breaker including: a CT installed on the line and configured to monitor an instantaneous current; and a control circuit unit comprising: an operation module configured to receive an instantaneous current sensed by the CT, to measure an instantaneous current value per unit time, and to calculate a slope of the instantaneous current per unit time; a determination module configured to determine a case as an overload state, the case having the slope exceeding an overcurrent determination value A, and to cause an overload state determination signal to be output; and an output module configured to output a trip module actuation signal according to the overload state determination signal of the determination module and to cut off the line, and accordingly, the earth leakage breaker causes the tri
    Type: Grant
    Filed: March 25, 2022
    Date of Patent: May 14, 2024
    Assignee: DONG-A ELECTRIC CO., LTD.
    Inventors: Tae Woo Kim, Chul Bum Joo, Eun Sik Park
  • EARTH LEAKAGE BREAKER HAVING BUILT-IN TRIP MODULE TYPE CIRCUIT BREAKER
    Publication number: 20230290600
    Abstract: Proposed is an earth leakage breaker having a built-in trip module type circuit breaker, which is installed at a line between a power supply and a load and has a trip module configured to cut the line off, the earth leakage breaker including: a CT installed on the line and configured to monitor an instantaneous current; and a control circuit unit comprising: an operation module configured to receive an instantaneous current sensed by the CT, to measure an instantaneous current value per unit time, and to calculate a slope of the instantaneous current per unit time; a determination module configured to determine a case as an overload state, the case having the slope exceeding an overcurrent determination value A, and to cause an overload state determination signal to be output; and an output module configured to output a trip module actuation signal according to the overload state determination signal of the determination module and to cut off the line, and accordingly, the earth leakage breaker causes the tri
    Type: Application
    Filed: March 25, 2022
    Publication date: September 14, 2023
    Inventors: Tae Woo KIM, Chul Bum JOO, Eun Sik PARK