INSULATION MONITORING DEVICE AND CONTROL METHOD THEREFOR

WIPO Patent Application WO/2021/107289

A1

The present invention includes: a signal generation unit for applying a pulse signal to a power line; a signal measurement unit for measuring the voltage of an applied pulse signal from the ground, when the pulse signal is applied to the ground through insulation resistance; an average voltage calculation unit for calculating the average voltage of the voltages measured during a period depending on sampling intervals; and a control unit for calculating the sampling intervals on the basis of an initial sampling interval and a preset time multiple, calculating the average voltage during the sampling period according to the calculated sampling intervals, and, according to whether the difference between a calculated first average voltage and a second average voltage measured before the first average voltage is within a first error range, detecting the first average voltage as a normal voltage, or calculating the sampling intervals by applying different time multiples thereto.

WO/2017/147448	TEST MEASUREMENT SYSTEM AND METHOD FOR USING SAME IN LOW VOLTAGE SYSTEMS
JPH04177179	APPARATUS FOR DETECTING PARTIAL DISCHARGE OF ELECTRIC MACHINERY

JANG SUHYEONG (KR)
HONG JONGPHIL (KR)
KIM PYUNGJUNG (KR)

PCT/KR2020/004502

June 03, 2021

April 02, 2020

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LS ELECTRIC CO LTD (KR)
NAT UNIV CHUNGBUK IND ACAD COOP FOUND (KR)
DONGWOO ELECTRIC CORP (KR)

G01R31/14; G01R19/165; G01R19/25; G01R27/02; G01R31/12; H02J9/00

KR20190030831A	2019-03-25
JP2015197308A	2015-11-09
KR20110094431A	2011-08-24
KR100979285B1	2010-08-31
KR20100007445A	2010-01-22
KR20190000667A	2019-01-03

See also references of EP 4067915A4

PARK, Jang-Won (KR)

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