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WO2009002120A3 - Measuring instrument for a resistive electric leakage current - Google Patents

Measuring instrument for a resistive electric leakage current Download PDF

Info

Publication number
WO2009002120A3
WO2009002120A3 PCT/KR2008/003729 KR2008003729W WO2009002120A3 WO 2009002120 A3 WO2009002120 A3 WO 2009002120A3 KR 2008003729 W KR2008003729 W KR 2008003729W WO 2009002120 A3 WO2009002120 A3 WO 2009002120A3
Authority
WO
WIPO (PCT)
Prior art keywords
leakage current
voltage
outputs
signal generator
amplifier
Prior art date
Application number
PCT/KR2008/003729
Other languages
French (fr)
Other versions
WO2009002120A2 (en
Inventor
Yong Goo Lee
Song Yop Hahn
Original Assignee
Ll Co Ltd
Iksemicon Co Ltd
Yong Goo Lee
Song Yop Hahn
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ll Co Ltd, Iksemicon Co Ltd, Yong Goo Lee, Song Yop Hahn filed Critical Ll Co Ltd
Priority to CN2008800111454A priority Critical patent/CN101663589B/en
Publication of WO2009002120A2 publication Critical patent/WO2009002120A2/en
Publication of WO2009002120A3 publication Critical patent/WO2009002120A3/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/52—Testing for short-circuits, leakage current or ground faults
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/16—Measuring impedance of element or network through which a current is passing from another source, e.g. cable, power line
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/16—Measuring impedance of element or network through which a current is passing from another source, e.g. cable, power line
    • G01R27/18—Measuring resistance to earth, i.e. line to ground

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

An instrument for measuring ground-resistive leakage current is disclosed. A leakage current detection circuit detects composite leakage current from a line under test. A current-to-voltage conversion circuit converts the composite leakage current from the leakage current detection circuit into corresponding voltage, and then outputs the resulting voltage. An amplifier amplifies an output signal from the current-to-voltage conversion circuit. A phase inverter inverts the phase of one of output signals from the amplifier. A synchronization signal generator detects voltage from the line under test and then generates synchronization signals. Two half-wave integrators receive the synchronization signals from the synchronization signal generator and alternately integrate the output signals from the amplifier for each half period. A sample/hold circuit receives the synchronization signals from the synchronization signal generator, alternately performs sampling on outputs from the half-wave integrators for each half period and then holds values corresponding to the outputs for a half period.
PCT/KR2008/003729 2007-06-28 2008-06-27 Measuring instrument for a resistive electric leakage current WO2009002120A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2008800111454A CN101663589B (en) 2007-06-28 2008-06-27 Measuring instrument for a resistive electric leakage current

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020070064664A KR100896091B1 (en) 2007-06-28 2007-06-28 Earth resistive leakage current measuring instrument
KR10-2007-0064664 2007-06-28

Publications (2)

Publication Number Publication Date
WO2009002120A2 WO2009002120A2 (en) 2008-12-31
WO2009002120A3 true WO2009002120A3 (en) 2009-03-12

Family

ID=40186176

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2008/003729 WO2009002120A2 (en) 2007-06-28 2008-06-27 Measuring instrument for a resistive electric leakage current

Country Status (3)

Country Link
KR (1) KR100896091B1 (en)
CN (1) CN101663589B (en)
WO (1) WO2009002120A2 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200453295Y1 (en) * 2009-10-22 2011-04-20 주식회사 에렐 Earth Leakage Circuit Breaker for Large Charge Current Converter
CA2800584A1 (en) * 2010-06-07 2011-12-15 Ampcontrol Pty Ltd Method for detection of leakage or fault currents from equipment in an electrical power system
KR101157125B1 (en) * 2011-05-04 2012-06-22 주식회사 유컴테크놀러지 Device for detecting resistive current and method thereof
JP5228128B1 (en) 2012-05-28 2013-07-03 タナシン電機株式会社 Signal generation device, measurement device, leakage detection device, and signal generation method
US8803569B1 (en) 2013-06-27 2014-08-12 International Business Machines Corporation Ramp generator using operational amplifier based integration and switched capacitor techniques
KR101671638B1 (en) * 2015-07-13 2016-11-01 김진학 Apparatus for displaying and warning between ground and electric power lines
JP6283919B2 (en) * 2016-01-12 2018-02-28 パナソニックＩｐマネジメント株式会社 Earth leakage detector
JP6718394B2 (en) * 2017-02-06 2020-07-08 株式会社日立産機システム Insulation monitoring device and insulation monitoring system
JP6460146B2 (en) * 2017-04-21 2019-01-30 オムロン株式会社 Leakage current calculation device and leakage current calculation method
CN110794258B (en) * 2019-10-28 2022-05-06 江苏能电科技有限公司 Electric circuit sparking detection method, device, equipment and storage medium
CN111766497B (en) * 2020-07-28 2023-01-17 哈尔滨工业大学 A high-precision weak transient current testing system and method
CN112526437A (en) * 2020-11-27 2021-03-19 国网湖北省电力有限公司营销服务中心(计量中心) Real-time acquisition system for running state of high-voltage transformer group

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4558275A (en) * 1981-04-21 1985-12-10 The Superior Electric Company Line voltage monitor system
US6556397B2 (en) * 2000-05-12 2003-04-29 Human El-Tech, Inc. Device and method for detecting arc fault
KR200381335Y1 (en) * 2005-01-18 2005-04-12 주식회사 텔코코리아 Electronic earth leakage circuit braker
US20060109009A1 (en) * 2004-11-19 2006-05-25 Esw-Extel Systems Wedel Gesellschaft Fuer Ausruestung Mbh Method and device for the detection of fault current arcing in electric circuits

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08182180A (en) 1994-12-22 1996-07-12 Tempearl Ind Co Ltd Integration judging circuit and resistance component leakage detecting circuit using it
CN2399735Y (en) * 1999-08-18 2000-10-04 屠亚奇 Computer controlled insulation monitor
CN2847308Y (en) * 2005-07-08 2006-12-13 河海大学常州校区 Circuit device of leakage current detector of lightning arrestor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4558275A (en) * 1981-04-21 1985-12-10 The Superior Electric Company Line voltage monitor system
US6556397B2 (en) * 2000-05-12 2003-04-29 Human El-Tech, Inc. Device and method for detecting arc fault
US20060109009A1 (en) * 2004-11-19 2006-05-25 Esw-Extel Systems Wedel Gesellschaft Fuer Ausruestung Mbh Method and device for the detection of fault current arcing in electric circuits
KR200381335Y1 (en) * 2005-01-18 2005-04-12 주식회사 텔코코리아 Electronic earth leakage circuit braker

Also Published As

Publication number Publication date
KR100896091B1 (en) 2009-05-14
KR20090000530A (en) 2009-01-07
CN101663589B (en) 2012-07-25
CN101663589A (en) 2010-03-03
WO2009002120A2 (en) 2008-12-31

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