Patents by Inventor Kwang-Yeop JANG

Kwang-Yeop JANG 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 for estimating lifetime of the SPD using discharge characteristics of the MOV
    Patent number: 10725088
    Abstract: An apparatus for estimating the lifetime of a surge protective device (SPD) using the discharge characteristics of a metal oxide varistor (MOV) includes an MOV having an input terminal and an output terminal; an impulse voltage application unit applying an impulse voltage for MOV test to the input terminal of the MOV; a discharge current measurement unit; a first switching unit connecting a power line to the input terminal of the MOV; a second switching unit connecting a ground line to the output terminal of the MOV in the normal mode and selectively connecting the discharge current measurement unit in the MOV test mode; an MOV test management unit providing information; a discharge current check unit generating an MOV abnormal signal; and an MOV state display unit displaying an MOV abnormal signal.
    Type: Grant
    Filed: May 25, 2018
    Date of Patent: July 28, 2020
    Assignee: Sunkwang Lightning Protection Technical Institute Inc.
    Inventors: Dong-Jin Kim, Won-Sung Kwon, Yong-Su Kim, Jae-Hyo Park, Kyung-Hoon Jang, Kwang-Yeop Jang, Dong-Hyun Kim, Sang-Won Seo, Byeong-U Kim, Hee-Soo Park
  • APPARATUS FOR ESTIMATING LIFETIME OF THE SPD USING DISCHARGE CHARACTERISTICS OF THE MOV
    Publication number: 20190353694
    Abstract: An apparatus for estimating the lifetime of a surge protective device (SPD) using the discharge characteristics of a metal oxide varistor (MOV) includes an MOV having an input terminal and an output terminal; an impulse voltage application unit applying an impulse voltage for MOV test to the input terminal of the MOV; a discharge current measurement unit; a first switching unit connecting a power line to the input terminal of the MOV; a second switching unit connecting a ground line to the output terminal of the MOV in the normal mode and selectively connecting the discharge current measurement unit in the MOV test mode; an MOV test management unit providing information; a discharge current check unit generating an MOV abnormal signal; and an MOV state display unit displaying an MOV abnormal signal.
    Type: Application
    Filed: May 25, 2018
    Publication date: November 21, 2019
    Inventors: Dong-Jin KIM, Won-Sung KWON, Yong-Su KIM, Jae-Hyo PARK, Kyung-Hoon JANG, Kwang-Yeop JANG, Dong-Hyun KIM, Sang-Won SEO, Byeong-U KIM, Hee-Soo PARK