WO2009027373A3 - Measuring and/or switching device - Google Patents

Measuring and/or switching device Download PDF

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Publication number
WO2009027373A3
WO2009027373A3 PCT/EP2008/061089 EP2008061089W WO2009027373A3 WO 2009027373 A3 WO2009027373 A3 WO 2009027373A3 EP 2008061089 W EP2008061089 W EP 2008061089W WO 2009027373 A3 WO2009027373 A3 WO 2009027373A3
Authority
WO
WIPO (PCT)
Prior art keywords
iron
cored
current transformer
measuring
current
Prior art date
Application number
PCT/EP2008/061089
Other languages
German (de)
French (fr)
Other versions
WO2009027373A2 (en
Inventor
Thomas Kiendl
Original Assignee
Siemens Ag
Thomas Kiendl
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 Siemens Ag, Thomas Kiendl filed Critical Siemens Ag
Priority to CN200880104767.1A priority Critical patent/CN101790689B/en
Publication of WO2009027373A2 publication Critical patent/WO2009027373A2/en
Publication of WO2009027373A3 publication Critical patent/WO2009027373A3/en

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/04—Arrangements for preventing response to transient abnormal conditions, e.g. to lightning or to short duration over voltage or oscillations; Damping the influence of dc component by short circuits in ac networks
    • H02H1/046—Arrangements for preventing response to transient abnormal conditions, e.g. to lightning or to short duration over voltage or oscillations; Damping the influence of dc component by short circuits in ac networks upon detecting saturation of current transformers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
    • G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
    • G01R15/183—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers using transformers with a magnetic core
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/02—Measuring effective values, i.e. root-mean-square values
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
    • G01R19/2506—Arrangements for conditioning or analysing measured signals, e.g. for indicating peak values ; Details concerning sampling, digitizing or waveform capturing

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
  • Transformers For Measuring Instruments (AREA)
  • Protection Of Transformers (AREA)
  • Measurement Of Current Or Voltage (AREA)

Abstract

The application discloses methods how to arithmetically calculate a corrected effective value from a real effective value of a secondary current of an iron-cored current transformer when magnetization of the iron core reaches the saturation point during generation of the secondary current from a primary current. The corrected value simulates the case that the saturation point is not reached, thus making it possible to use a smaller than normal iron-cored current transformer in measuring and/or switching devices comprising an iron-cored current transformer, e.g. in a low-voltage circuit breaker.
PCT/EP2008/061089 2007-08-27 2008-08-25 Measuring and/or switching device WO2009027373A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN200880104767.1A CN101790689B (en) 2007-08-27 2008-08-25 Measuring and/or switching device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007041176.8 2007-08-27
DE200710041176 DE102007041176A1 (en) 2007-08-27 2007-08-27 Measuring and / or switching device

Publications (2)

Publication Number Publication Date
WO2009027373A2 WO2009027373A2 (en) 2009-03-05
WO2009027373A3 true WO2009027373A3 (en) 2009-05-07

Family

ID=40265969

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/061089 WO2009027373A2 (en) 2007-08-27 2008-08-25 Measuring and/or switching device

Country Status (3)

Country Link
CN (1) CN101790689B (en)
DE (1) DE102007041176A1 (en)
WO (1) WO2009027373A2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010019533B4 (en) * 2010-05-06 2015-01-15 Eaton Industries Gmbh Current measuring method for a switching device with parallel current paths
IT1403832B1 (en) * 2011-01-31 2013-10-31 Eliwell Controls S R L Con Unico Socio DEVICE AND PROCEDURE FOR MEASURING AN ALTERNATE VOLTAGE
DE102012108149A1 (en) * 2012-09-03 2014-03-06 Hella Kgaa Hueck & Co. Flux compensation for flux replicas for multiphase DC-DC converters
WO2017001950A1 (en) * 2015-06-29 2017-01-05 Abb Technology Ltd. A method for correcting effect of saturation in current transformer and an intelligent electronic device therefor
CN106712614A (en) * 2017-03-17 2017-05-24 保定天威保变电气股份有限公司 Waveform factor correcting device and waveform factor correcting method
DE102022200909A1 (en) * 2022-01-27 2023-07-27 Siemens Aktiengesellschaft Apparatus for determining a compensated RMS value and method for determining a compensated RMS value

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0506035A1 (en) * 1991-03-27 1992-09-30 Asea Brown Boveri Ab Method and device for detecting saturation in current transformers
WO2004093115A1 (en) * 2003-04-17 2004-10-28 Myongji University Method for compensating secondary current of current transformers
US20050094344A1 (en) * 2002-10-11 2005-05-05 Myongji University Method of compensating for distorted secondary current of current transformer
US6927563B2 (en) * 2001-10-02 2005-08-09 Abb Patent Gmbh Method and device for current value determination using a current transformer which operates in the core saturation region

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0506035A1 (en) * 1991-03-27 1992-09-30 Asea Brown Boveri Ab Method and device for detecting saturation in current transformers
US6927563B2 (en) * 2001-10-02 2005-08-09 Abb Patent Gmbh Method and device for current value determination using a current transformer which operates in the core saturation region
US20050094344A1 (en) * 2002-10-11 2005-05-05 Myongji University Method of compensating for distorted secondary current of current transformer
WO2004093115A1 (en) * 2003-04-17 2004-10-28 Myongji University Method for compensating secondary current of current transformers

Also Published As

Publication number Publication date
CN101790689B (en) 2013-05-01
CN101790689A (en) 2010-07-28
WO2009027373A2 (en) 2009-03-05
DE102007041176A1 (en) 2009-03-05

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