WO2008090776A1 - 漏電検出回路及び漏電検出方法 - Google Patents

漏電検出回路及び漏電検出方法 Download PDF

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Publication number
WO2008090776A1
WO2008090776A1 PCT/JP2008/050289 JP2008050289W WO2008090776A1 WO 2008090776 A1 WO2008090776 A1 WO 2008090776A1 JP 2008050289 W JP2008050289 W JP 2008050289W WO 2008090776 A1 WO2008090776 A1 WO 2008090776A1
Authority
WO
WIPO (PCT)
Prior art keywords
electric leak
current
leak detecting
phase
electric
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2008/050289
Other languages
English (en)
French (fr)
Inventor
Satoshi Yagi
Hiroshi Doumae
Morikuni Natsume
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daikin Industries Ltd
Original Assignee
Daikin Industries Ltd
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 Daikin Industries Ltd filed Critical Daikin Industries Ltd
Publication of WO2008090776A1 publication Critical patent/WO2008090776A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
    • H02H11/005—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of too low isolation resistance, too high load, short-circuit; earth fault
    • 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)
  • Control Of Ac Motors In General (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Protection Of Generators And Motors (AREA)

Abstract

　本発明は、安価な漏電検出回路である。多相交流モータ３の運転前に、電源スイッチ部（２）（スイッチ（２１～２３））をＯＦＦしスイッチ（４）をＯＮする。例えば多相交流モータ（３）に漏電が生じていた場合は、多相交流電源（１）、出力線（８１）、第２ライン（８５）、電流検出抵抗（５）から成るラインに電流が流れる。判定部（７２）は、電流検知部（６）によって検出された、電流検出抵抗（５）を流れる電流値が所定の値を超えているか否かで漏電が発生しているか否かを判断する。即ち、出力線（８１）を流れる電流から漏電を検出することができ、出力線（８１～８３）を流れる電流の総和に基づいて漏電を検出する場合と比べて、安価な電流検知部を用いることができる。
PCT/JP2008/050289 2007-01-25 2008-01-11 漏電検出回路及び漏電検出方法 Ceased WO2008090776A1 (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-014741 2007-01-25
JP2007014741A JP2008180626A (ja) 2007-01-25 2007-01-25 漏電検出回路及び漏電検出方法

Publications (1)

Publication Number Publication Date
WO2008090776A1 true WO2008090776A1 (ja) 2008-07-31

Family

ID=39644351

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/050289 Ceased WO2008090776A1 (ja) 2007-01-25 2008-01-11 漏電検出回路及び漏電検出方法

Country Status (2)

Country Link
JP (1) JP2008180626A (ja)
WO (1) WO2008090776A1 (ja)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0759257A (ja) * 1993-08-16 1995-03-03 Nippondenso Co Ltd 冷媒圧縮機用モータの漏電防止装置
JP2006271144A (ja) * 2005-03-25 2006-10-05 Nikon Corp ３相モータの漏電検出装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0759257A (ja) * 1993-08-16 1995-03-03 Nippondenso Co Ltd 冷媒圧縮機用モータの漏電防止装置
JP2006271144A (ja) * 2005-03-25 2006-10-05 Nikon Corp ３相モータの漏電検出装置

Also Published As

Publication number Publication date
JP2008180626A (ja) 2008-08-07

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