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TW200710406A - Leakage current detection apparatus and leakage current detection method - Google Patents

Leakage current detection apparatus and leakage current detection method

Info

Publication number
TW200710406A
TW200710406A TW095124687A TW95124687A TW200710406A TW 200710406 A TW200710406 A TW 200710406A TW 095124687 A TW095124687 A TW 095124687A TW 95124687 A TW95124687 A TW 95124687A TW 200710406 A TW200710406 A TW 200710406A
Authority
TW
Taiwan
Prior art keywords
leakage current
current detection
signal
detected
amplified
Prior art date
Application number
TW095124687A
Other languages
Chinese (zh)
Other versions
TWI299792B (en
Inventor
Yasumasa Kondou
Shinichi Nakayama
Tatsuhiko Komiya
Original Assignee
Sbc Corp
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 Sbc Corp filed Critical Sbc Corp
Publication of TW200710406A publication Critical patent/TW200710406A/en
Application granted granted Critical
Publication of TWI299792B publication Critical patent/TWI299792B/zh

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

Landscapes

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

Abstract

A leakage current detection apparatus for detecting a leakage current occurring at an electric line under test and caused by the capacitance relative to the ground. A leakage current I is detected from an electric line (A) under test, and the detected leakage current I is amplified by a first amplifier circuit (11). The signal amplified by the first amplifier circuit (11) is further amplified by a second amplifier circuit (13). On the basis of the signal amplified by the first amplifier circuit (11) and the signal amplified by the first and second amplifier circuits (11, 13), a multiplexer (20) selects a signal most suitable to be input to an A/D converter (21). A voltage applied to the electric line (A) under test is detected and the detected voltage is divided, after which the multiplexer (20) selects a signal most suitable to be input to the A/D converter (21). On the basis of the digital signal converted by the A/D converter (21), an arithmetic circuit (22) performs a predetermined calculation, thereby detecting a leakage current Igc caused by the capacitance relative to the ground.
TW095124687A 2005-07-06 2006-07-06 Leakage current detection apparatus and leakage current detection method TW200710406A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005197949 2005-07-06

Publications (2)

Publication Number Publication Date
TW200710406A true TW200710406A (en) 2007-03-16
TWI299792B TWI299792B (en) 2008-08-11

Family

ID=37604555

Family Applications (1)

Application Number Title Priority Date Filing Date
TW095124687A TW200710406A (en) 2005-07-06 2006-07-06 Leakage current detection apparatus and leakage current detection method

Country Status (3)

Country Link
JP (1) JP5216958B2 (en)
TW (1) TW200710406A (en)
WO (1) WO2007004698A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI474014B (en) * 2013-05-27 2015-02-21 Tanashin Denki Co Leakage current calculating device and leakage current calculating method
TWI512310B (en) * 2012-12-24 2015-12-11 Foxnum Technology Co Ltd Three-phase power abnormality detecting device
TWI557412B (en) * 2014-09-26 2016-11-11 Tanashin Denki Co Leakage current calculation device and leakage current calculation method
TWI708950B (en) * 2018-08-09 2020-11-01 日商日立製作所股份有限公司 Diagnosis device and method of electric machine, and rotating electric machine
TWI762235B (en) * 2021-03-12 2022-04-21 台達電子工業股份有限公司 Insulation resistance detection system for electric vehicle and method of detecting the same in insulation resistance
CN115951262A (en) * 2023-03-13 2023-04-11 青岛鼎信通讯股份有限公司 Natural fault leakage current detection method applied to power distribution area

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8513266B2 (en) * 2007-04-10 2013-08-20 Exelixis, Inc. Methods of treating cancer using pyridopyrimidinone inhibitors of PI3K alpha
FR2947054A1 (en) * 2009-06-23 2010-12-24 Schneider Electric Ind Sas DEVICE AND METHOD FOR INDICATING ELECTRICAL DEFECTS, ASSEMBLY AND ELECTRICAL TABLE COMPRISING SUCH A DEVICE
TW201220631A (en) * 2010-11-02 2012-05-16 Eneraiser Technology Co Ltd Failure detection and protection circuit for direct current power supply system
US9239586B2 (en) 2013-12-04 2016-01-19 Industrial Technology Research Institute Leakage-current start-up reference circuit
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
KR101877799B1 (en) * 2017-12-28 2018-07-13 에이디파워 주식회사 Device for Detecting Insulation Resistance
KR102861505B1 (en) * 2023-12-22 2025-09-17 에이치디현대일렉트릭 주식회사 Trip determination device and method for earth leakage circuit breakers that prevent mis-tripping due to external noise

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004012147A (en) * 2002-06-03 2004-01-15 Kawamura Electric Inc Insulation monitoring device and insulation monitoring method
JP4398198B2 (en) * 2003-08-20 2010-01-13 中国電力株式会社 Insulation degradation region diagnosis system and method for electric wire or cable
JP2005140532A (en) * 2003-11-04 2005-06-02 Toyoji Ahei Device and method for calculating phase angle, device and method for detecting leakage current

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI512310B (en) * 2012-12-24 2015-12-11 Foxnum Technology Co Ltd Three-phase power abnormality detecting device
TWI474014B (en) * 2013-05-27 2015-02-21 Tanashin Denki Co Leakage current calculating device and leakage current calculating method
TWI557412B (en) * 2014-09-26 2016-11-11 Tanashin Denki Co Leakage current calculation device and leakage current calculation method
TWI708950B (en) * 2018-08-09 2020-11-01 日商日立製作所股份有限公司 Diagnosis device and method of electric machine, and rotating electric machine
TWI762235B (en) * 2021-03-12 2022-04-21 台達電子工業股份有限公司 Insulation resistance detection system for electric vehicle and method of detecting the same in insulation resistance
CN115951262A (en) * 2023-03-13 2023-04-11 青岛鼎信通讯股份有限公司 Natural fault leakage current detection method applied to power distribution area

Also Published As

Publication number Publication date
JP5216958B2 (en) 2013-06-19
JPWO2007004698A1 (en) 2009-01-29
TWI299792B (en) 2008-08-11
WO2007004698A1 (en) 2007-01-11

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Legal Events

Date Code Title Description
MM4A Annulment or lapse of patent due to non-payment of fees