SG87747A1 - Earth leakage breaker - Google Patents

Earth leakage breaker

Info

Publication number
SG87747A1
SG87747A1 SG9610415A SG1996010415A SG87747A1 SG 87747 A1 SG87747 A1 SG 87747A1 SG 9610415 A SG9610415 A SG 9610415A SG 1996010415 A SG1996010415 A SG 1996010415A SG 87747 A1 SG87747 A1 SG 87747A1
Authority
SG
Singapore
Prior art keywords
earth leakage
leakage breaker
breaker
earth
leakage
Prior art date
Application number
SG9610415A
Other languages
English (en)
Inventor
Yokoyama Koichi
Yamada Yukihide
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Publication of SG87747A1 publication Critical patent/SG87747A1/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/14—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection
    • H01H83/144—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection with differential transformer
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens
    • H01F27/366—Electric or magnetic shields or screens made of ferromagnetic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/14—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection
    • H01H83/144—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection with differential transformer
    • H01H2083/146—Provisions for avoiding disadvantages of having asymetrical primaries, e.g. induction of a magnetic field even by zero difference current

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Breakers (AREA)
  • Transformers For Measuring Instruments (AREA)
SG9610415A 1995-09-19 1996-08-02 Earth leakage breaker SG87747A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7239509A JPH0992127A (ja) 1995-09-19 1995-09-19 漏電遮断器

Publications (1)

Publication Number Publication Date
SG87747A1 true SG87747A1 (en) 2002-04-16

Family

ID=17045856

Family Applications (1)

Application Number Title Priority Date Filing Date
SG9610415A SG87747A1 (en) 1995-09-19 1996-08-02 Earth leakage breaker

Country Status (4)

Country Link
JP (1) JPH0992127A (ja)
CN (1) CN1078009C (ja)
FR (1) FR2738952B1 (ja)
SG (1) SG87747A1 (ja)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4736949B2 (ja) * 2006-05-23 2011-07-27 富士電機機器制御株式会社 漏電遮断器
JP2011205025A (ja) * 2010-03-26 2011-10-13 Kawamura Electric Inc 零相変流器
JP5587008B2 (ja) * 2010-03-26 2014-09-10 河村電器産業株式会社 零相変流器
JP5465599B2 (ja) * 2010-05-17 2014-04-09 河村電器産業株式会社 零相変流器
FR3045926B1 (fr) * 2015-12-22 2017-12-22 Schneider Electric Ind Sas Transformateur permettant d'assurer l'alimentation d'un dispositif de traitement dans un appareil de protection electrique, et appareil comportant un tel transformateur

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0668778A (ja) * 1993-06-16 1994-03-11 Hitachi Ltd 漏電遮断器
JPH06267396A (ja) * 1993-03-16 1994-09-22 Hitachi Ltd 零相変流器
JPH06290978A (ja) * 1993-04-06 1994-10-18 Mitsubishi Electric Corp 零相電流検出装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2030487A5 (ja) * 1969-01-30 1970-11-13 Comp Generale Electricite
DE3737989C1 (de) * 1987-11-09 1989-05-11 Messwandler Bau Ag Hochspannungsspannungswandler
FR2679037B1 (fr) * 1991-07-10 1994-12-30 Abb Petercem Capteur de courant.
US5276416A (en) * 1991-09-20 1994-01-04 Kabushiki Kaisha Toshiba Circuit breaker
FR2687477B1 (fr) * 1992-02-14 1996-06-07 Abb Petercem Capteur de courant.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06267396A (ja) * 1993-03-16 1994-09-22 Hitachi Ltd 零相変流器
JPH06290978A (ja) * 1993-04-06 1994-10-18 Mitsubishi Electric Corp 零相電流検出装置
JPH0668778A (ja) * 1993-06-16 1994-03-11 Hitachi Ltd 漏電遮断器

Also Published As

Publication number Publication date
JPH0992127A (ja) 1997-04-04
CN1185646A (zh) 1998-06-24
CN1078009C (zh) 2002-01-16
FR2738952B1 (fr) 1999-07-23
FR2738952A1 (fr) 1997-03-21

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