The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 28, 2020
Filed:
May. 25, 2018
Sunkwang Lightning Protection Technical Institute Inc., Seoul, KR;
Dong-Jin Kim, Seoul, KR;
Won-Sung Kwon, Seoul, KR;
Yong-Su Kim, Seoul, KR;
Jae-Hyo Park, Seoul, KR;
Kyung-Hoon Jang, Seoul, KR;
Kwang-Yeop Jang, Gyeonggi-do, KR;
Dong-Hyun Kim, Seoul, KR;
Sang-Won Seo, Seoul, KR;
Byeong-U Kim, Seoul, KR;
Hee-Soo Park, Gyeonggi-do, KR;
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.