WO2011117299A1 - Messanordnung zur erfassung von wechselströmen - Google Patents
Messanordnung zur erfassung von wechselströmen Download PDFInfo
- Publication number
- WO2011117299A1 WO2011117299A1 PCT/EP2011/054450 EP2011054450W WO2011117299A1 WO 2011117299 A1 WO2011117299 A1 WO 2011117299A1 EP 2011054450 W EP2011054450 W EP 2011054450W WO 2011117299 A1 WO2011117299 A1 WO 2011117299A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- voltage
- measuring arrangement
- current
- measuring
- rogowski coil
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/20—Modifications of basic electric elements for use in electric measuring instruments; Structural combinations of such elements with such instruments
- G01R1/22—Tong testers acting as secondary windings 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
- G01R15/181—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers using coils without a magnetic core, e.g. Rogowski coils
Definitions
- the invention relates to a measuring device for detecting alternating currents in general, and more particularly to a measuring device for detecting alternating currents for measurement with an energy and power meter.
- Previous measuring systems find e.g. Application in industrial plants. There are often measured alternating currents with so-called current transformers. These current transformers - see FIG. 1 - are based on the transformer principle. According to this principle, an output signal is provided which is proportional to the measured current.
- Proportional means in the context of the invention phase-correct and amplitude proportional.
- the output signal obtained is usually a 0 A ... 1 A or a 0 A ... 5 A current signal.
- This signal range results from the fact that, for the measurement itself, rotating iron instruments were and are frequently used, which have a certain relatively high power requirement, which is likewise taken from the conductor to be measured by means of the alternating magnetic field.
- flap converters were developed in which the toroidal core is made in two parts, so that the ring of the converter by flaps l can be opened and closed again, so that a subsequent introduction into an existing installation is made possible.
- shunt measurements are also carried out in which the voltage at an introduced known but low resistance drops is measured.
- the object is achieved by a measuring arrangement for connection to an energy & power meter and for connection to a Rogowski coil for detecting alternating currents of a conductor to be measured.
- the measuring arrangement comprises an integrator circuit for generating a voltage signal proportional to the detected alternating current and a voltage / current converter for generating an output current which is proportional to the voltage signal generated by the integrator circuit.
- the voltage-to-current converter provides currents to the power & power meter of the metering device of up to 5 A or up to 1 amp.
- the output power of the voltage / current converter is up to 5 VA.
- the output includes a passive current injection stage.
- the Rogowski coil and the integrator circuit form an assembly.
- the Rogowski coil, the integrator circuit and the voltage / current converter form an assembly.
- the object is also achieved by a measuring system which has one of the previously described measuring arrangement and a Rogowski coil for detecting alternating currents of a conductor to be measured.
- the measuring system also has an energy & power meter.
- FIG. 1 a current transformer which operates according to the transformer principle
- FIG. 2 a measuring arrangement based on a Rogowski coil, which provides a voltage signal
- FIG. 3 an embodiment of a measuring arrangement or a measuring system according to a first embodiment of the invention
- FIG. 4 shows another embodiment of a measuring arrangement or measuring system according to a first embodiment of the invention
- FIG. 5 a schematic circuit variant of the embodiments, which contains a passive current stamping stage.
- FIG. 3 schematically shows an embodiment of a measuring arrangement or a measuring system according to a first embodiment of the invention.
- the measuring arrangement is suitable for connection to an energy & power meter 140.
- the power & power meter 140 may be a conventional power & power meter having a power input, e.g. is designed for the range 0..1 A or 0..5 A.
- the measuring arrangement is also suitable for being connected to a Rogowski coil 100 for detecting alternating currents of a conductor 110 to be measured.
- the measuring arrangement itself has an integrator circuit 120 for generating a voltage signal proportional to the detected alternating current and a voltage / current converter 130 for generating an output current which is proportional to the voltage signal generated by the integrator circuit.
- the Rogowski coil 100 and the integrator circuit 120 form a Baugru ppe, d. H . are housed in a common housing.
- the voltage / current converter 1 30 may be mounted close to the common assembly of the Rogowski coil 100 and the integrator circuit 120, or mounted close to the power & power meter 140, the decision being essentially dependent on which links between the module and the energy & power meter 140 and which resistance through the test leads, which the module with the voltage / current converter 1 30 and wel ch ed en voltage / current converter 130 with the energy & power meter 140 connects, is to be expected.
- the Rogowski coil 100, the integrator circuit 120 and the voltage / current converter 130 form an assembly.
- the voltage / current converter 130 of the measuring arrangement provides currents of up to 5 A or up to 1 A to the energy & power meter 140.
- the output power of the voltage / current converter 130 is up to 5 VA. This power is sufficient to perform a low-power measurement and corresponds to the reduced input burdens of today's energy & power meter 140. Furthermore, this restriction also ensures that the overall design of the voltage / current converter 130 can be kept compact and so easy integration into existing facilities is enabled.
- the output includes a passive current injection stage, which is shown as a schematic Besclienssection in the right half of Figure 5 and will be explained below.
- a passive current injection stage which is shown as a schematic Besclienssection in the right half of Figure 5 and will be explained below.
- the signal obtained from a Rogowski coil 100 is indicated by "in” on the left side of the figure, to an integrator circuit 120.
- the integrator circuit has a first operational amplifier OP1, which is connected to a capacitor C5 and a resistor, shown here as a resistor series circuit of R 18 and R17, in feedback of the output signal.
- the output signal of the integrator is now supplied via a matching network consisting of R 16 C3 and R22 a voltage / current converter 130, which is now shown on the right side of the figure.
- the customization network is not a necessary component and is only listed as an example.
- the voltage / current converter 130 has a second operational amplifier OP2, which then provides the output signal of the first operational amplifier, that is, the voltage signal, into the signal via an input network for driving a passive Strom margework exemplified formed by two transistors T1 and T2 on the right side. Even if this wiring is an external Power supply of the transistors T1 and T2 requires, this circuit variant may be advantageous, for example, with large Meßtechnischsusn.
- an entire measuring system which comprises one of the previously described measuring arrangement of integrator 120 and voltage / current converter 130 and includes a Rogowski coil 100 for detecting alternating currents of a conductor to be measured, to a conventional Energy & Power Meter 140 to be connected.
- the measuring system also has this energy & power meter 140.
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)
- Measurement Of Current Or Voltage (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2011800147509A CN102822684A (zh) | 2010-03-24 | 2011-03-24 | 用于探测交流电流的测量装置 |
RU2012143506/28A RU2012143506A (ru) | 2010-03-24 | 2011-03-24 | Измерительное устройство для индикации переменного тока |
EP11711503A EP2550537A1 (de) | 2010-03-24 | 2011-03-24 | Messanordnung zur erfassung von wechselströmen |
BR112012023900A BR112012023900A2 (pt) | 2010-03-24 | 2011-03-24 | arranjo de medição para a detecção de correntes alternadas |
US13/623,929 US20130082690A1 (en) | 2010-03-24 | 2012-09-21 | Measuring arrangement for detecting alternating currents |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010012691.8 | 2010-03-24 | ||
DE102010012691 | 2010-03-24 | ||
DE102010012834.1 | 2010-03-25 | ||
DE102010012834A DE102010012834A1 (de) | 2010-03-24 | 2010-03-25 | Messanordnung zur Erfassung von Wechselströmen |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/623,929 Continuation US20130082690A1 (en) | 2010-03-24 | 2012-09-21 | Measuring arrangement for detecting alternating currents |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2011117299A1 true WO2011117299A1 (de) | 2011-09-29 |
Family
ID=44585970
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2011/054450 WO2011117299A1 (de) | 2010-03-24 | 2011-03-24 | Messanordnung zur erfassung von wechselströmen |
Country Status (7)
Country | Link |
---|---|
US (1) | US20130082690A1 (de) |
EP (1) | EP2550537A1 (de) |
CN (1) | CN102822684A (de) |
BR (1) | BR112012023900A2 (de) |
DE (2) | DE202010018290U1 (de) |
RU (1) | RU2012143506A (de) |
WO (1) | WO2011117299A1 (de) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB201105400D0 (en) * | 2011-03-30 | 2011-05-11 | Power Electronic Measurements Ltd | Apparatus for current measurement |
CN103076481A (zh) * | 2012-12-26 | 2013-05-01 | 北京科锐配电自动化股份有限公司 | 三相集成电子式互感器 |
DE202014103953U1 (de) | 2014-08-25 | 2015-05-11 | Phoenix Contact Gmbh & Co. Kg | Halterungseinrichtung für eine Rogowskispule |
DE102014112105A1 (de) | 2014-08-25 | 2016-02-25 | Phoenix Contact Gmbh & Co. Kg | Halterungseinrichtung für eine Rogowskispule |
DE102015120319A1 (de) | 2015-11-24 | 2017-05-24 | Phoenix Contact Gmbh & Co. Kg | Induktiver Strommesswandler |
DE102018109877A1 (de) | 2018-04-24 | 2019-10-24 | Elpro Gmbh | Luftspule |
DE102018109876A1 (de) | 2018-04-24 | 2019-10-24 | Elpro Gmbh | Luftspule |
DE102018109878A1 (de) | 2018-04-24 | 2019-10-24 | Elpro Gmbh | Verfahren zur Herstellung einer Luftspule |
CN108872654A (zh) * | 2018-06-04 | 2018-11-23 | 深圳市创银科技股份有限公司 | 一种三相电流低压采集装置及采集方法 |
EP3578998B1 (de) | 2018-06-08 | 2024-09-04 | 3M Innovative Properties Company | Impedanzanordnung |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6094044A (en) * | 1998-05-07 | 2000-07-25 | Airpax Corporation, Llc | AC current sensor having high accuracy and large bandwidth |
US20020053911A1 (en) * | 2000-11-08 | 2002-05-09 | Kabushiki Kaisha Toshiba | Integrated gas-insulated switchgear with current transducer system |
US20080048646A1 (en) * | 2006-07-06 | 2008-02-28 | Schweitzer Engineering Laboratories, Inc. | Precision, temperature-compensated, shielded current measurement device |
US20090243590A1 (en) * | 2008-04-01 | 2009-10-01 | Stephen James West | System and method for monitoring current in a conductor |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DD148681A1 (de) * | 1980-01-22 | 1981-06-03 | Werner Brendler | Schaltungsanordnung zur strommessung mittels eines magnetischen spannungsmessers |
JP2740943B2 (ja) * | 1994-10-31 | 1998-04-15 | 大日本印刷株式会社 | 耐摩耗性を有する化粧材 |
US7579824B2 (en) * | 2006-09-29 | 2009-08-25 | Gm Global Technology Operations, Inc. | High-precision Rogowski current transformer |
US7791353B2 (en) * | 2007-02-13 | 2010-09-07 | California Institute Of Technology | Ground loop locator |
KR100964071B1 (ko) * | 2007-12-13 | 2010-06-16 | 엘에스산전 주식회사 | 계기용 변성기 |
-
2010
- 2010-03-25 DE DE202010018290.5U patent/DE202010018290U1/de not_active Expired - Lifetime
- 2010-03-25 DE DE102010012834A patent/DE102010012834A1/de not_active Withdrawn
-
2011
- 2011-03-24 WO PCT/EP2011/054450 patent/WO2011117299A1/de active Application Filing
- 2011-03-24 EP EP11711503A patent/EP2550537A1/de not_active Withdrawn
- 2011-03-24 BR BR112012023900A patent/BR112012023900A2/pt not_active IP Right Cessation
- 2011-03-24 CN CN2011800147509A patent/CN102822684A/zh active Pending
- 2011-03-24 RU RU2012143506/28A patent/RU2012143506A/ru unknown
-
2012
- 2012-09-21 US US13/623,929 patent/US20130082690A1/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6094044A (en) * | 1998-05-07 | 2000-07-25 | Airpax Corporation, Llc | AC current sensor having high accuracy and large bandwidth |
US20020053911A1 (en) * | 2000-11-08 | 2002-05-09 | Kabushiki Kaisha Toshiba | Integrated gas-insulated switchgear with current transducer system |
US20080048646A1 (en) * | 2006-07-06 | 2008-02-28 | Schweitzer Engineering Laboratories, Inc. | Precision, temperature-compensated, shielded current measurement device |
US20090243590A1 (en) * | 2008-04-01 | 2009-10-01 | Stephen James West | System and method for monitoring current in a conductor |
Also Published As
Publication number | Publication date |
---|---|
BR112012023900A2 (pt) | 2016-08-02 |
DE202010018290U1 (de) | 2015-06-03 |
EP2550537A1 (de) | 2013-01-30 |
CN102822684A (zh) | 2012-12-12 |
US20130082690A1 (en) | 2013-04-04 |
RU2012143506A (ru) | 2014-04-27 |
DE102010012834A1 (de) | 2011-09-29 |
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