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WO2007068221A1 - Dispositif de mesure pour la formation d'une valeur de mesure de courant - Google Patents

Dispositif de mesure pour la formation d'une valeur de mesure de courant Download PDF

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Publication number
WO2007068221A1
WO2007068221A1 PCT/DE2005/002285 DE2005002285W WO2007068221A1 WO 2007068221 A1 WO2007068221 A1 WO 2007068221A1 DE 2005002285 W DE2005002285 W DE 2005002285W WO 2007068221 A1 WO2007068221 A1 WO 2007068221A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic field
measuring device
measuring
field sensor
conductor
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/DE2005/002285
Other languages
German (de)
English (en)
Inventor
Reinhold Keck
Manfred Meinherz
Olszewski Wojclech
Peter Schmidt
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens 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 Siemens AG, Siemens Corp filed Critical Siemens AG
Priority to PCT/DE2005/002285 priority Critical patent/WO2007068221A1/fr
Priority to DE112005003827T priority patent/DE112005003827A5/de
Publication of WO2007068221A1 publication Critical patent/WO2007068221A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • G01R15/20—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices, i.e. measuring a magnetic field via the interaction between a current and a magnetic field, e.g. magneto resistive or Hall effect devices
    • G01R15/207—Constructional details independent of the type of device used
    • 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
    • G01R15/20—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices, i.e. measuring a magnetic field via the interaction between a current and a magnetic field, e.g. magneto resistive or Hall effect devices
    • G01R15/202—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices, i.e. measuring a magnetic field via the interaction between a current and a magnetic field, e.g. magneto resistive or Hall effect devices using Hall-effect devices

Definitions

  • the invention relates to a measuring device for forming a current reading, which indicates a current flowing in an electrical conductor, the measuring device comprising at least one magnetic field sensor for measuring a magnetic field caused by the current in the conductor and an evaluation device connected to the at least one magnetic field sensor Current reading includes.
  • Such a measuring device is known from German Offenlegungsschrift 199 14 772.
  • the previously known measuring device comprises two Hall sensors, which are arranged offset by 180 degrees around an electrical conductor and detect the magnetic field generated by the conductor with different signs.
  • the measurement signals generated by the two Hall sensors are further processed in an evaluation device to a current measurement.
  • the evaluation device comprises a subtractor, which subtracts the measurement signals of the two Hall sensors from each other, whereby interference signals which are contained in the measurement signals of the two Hall sensors of the same magnitude and with identical sign, are eliminated. Since the magnetic field generated by the conductor is detected by the two Hall sensors with different signs, the total Nutzstrommesssignal is doubled by the subtraction.
  • the invention has for its object to provide a measuring device that is very universal and allows very accurate measurement results.
  • the measuring device has at least two different measuring ranges, the measuring device having at least one strongly coupled magnetic field sensor for one of the measuring ranges and at least one weakly coupled magnetic field sensor for the other measuring range, and the strongly coupled magnetic field sensor being stronger with the magnetic field of the conductor is coupled as the weakly coupled magnetic field sensor.
  • a significant advantage of the measuring device according to the invention is that it allows a very accurate measurement of the current flowing in the conductor for different operating states of the conductor.
  • one of the measuring ranges for the rated current range of the conductor and another measuring range may be designed for the case of a short circuit.
  • the different measuring ranges are made available due to the inventively different coupling of the magnetic field sensors with the magnetic field of the conductor.
  • the measuring device may for example be part of a protection system and used to monitor an electrical system, such as a power transmission system.
  • the measuring device is a Radiostrommess Scheme that is suitable for measuring the current flowing through the conductor during fault-free operation of the system, and a Kurzröstrommess Scheme, for measuring a flowing through the conductor Short-circuit current is suitable during a fault condition of the system has.
  • the at least one weakly coupled magnetic field sensor and for the operating current measuring range the at least one strongly coupled magnetic field sensor is used. Due to the two measuring ranges, both a very accurate measurement during normal operation of the system and a very accurate measurement in the event of a short circuit is possible.
  • the problem can occur that the current flowing in the conductor Current is too large and thus can not or not accurately measured with the designed for the "usual operation" strongly coupled magnetic field sensor in the additionally provided weakly coupled magnetic field sensor, this problem does not or at least less clearly because the weakly coupled magnetic field sensor, the magnetic field of the conductor
  • the weakly coupled magnetic field sensor is thus able to generate a relatively accurate measured current value, even if very short-circuit currents occur, given a correspondingly set coupling efficiency.
  • the measuring range of the heavily coupled magnetic field sensor can detect all those magnetic field strengths that are usually caused during the fault-free operation of the system by the operating current.
  • the measuring range of the weakly coupled magnetic field sensor preferably detects all those magnetic field strengths which, during a fault condition of the system, are due to a fault current
  • the strongly coupled magnetic field sensor for example, has a smaller distance to the conductor than the s ⁇ hwachgekoppelte magnetic field sensor.
  • a ferromagnetic material is involved in the magnetic coupling of the strongly coupled magnetic field sensor.
  • Very accurate current measurement values can be formed if interference fields that are undesirably detected by the magnetic field sensors are "eliminated” during the formation of the current measured values a strongly coupled sensor pair with two strongly coupled magnetic field sensors, which are arranged offset by 180 degrees and each have the same distance from the conductor, and in addition, if the evaluation device is connected to the two strongly coupled magnetic field sensors and calculates the interference fields measured by the two strongly coupled magnetic field sensors in the formation of the current measured value.
  • the "taking out” or “disregard” of interference fields can be done for example in the manner described in the above-mentioned published application 199 14 772.
  • the measuring device for the operating current measuring range can have four strongly coupled magnetic field sensors, which are arranged offset by 90 degrees from each other and each have the same distance to the conductor.
  • the evaluation device is connected to the four strongly coupled magnetic field sensors and preferably disregards the interference fields measured by the strongly coupled magnetic field sensors in the formation of the current measurement value.
  • the "out-count n or" Unbeschschreibtides "from interference fields by four by 90 degrees staggered sensors can play examples be effected in the manner, as is also described in the aforementioned Offenlegungsschrift 199 14 772nd
  • the measuring device preferably comprises a ferrite element, wherein the at least one strongly coupled magnetic field sensor is arranged in an air gap of the ferrite element and the at least one weakly coupled magnetic field sensor outside the ferrite element.
  • the at least one weakly coupled magnetic field sensor is attached to the outside of the ferrite element.
  • the ferrite element on two or four air gaps, which are arranged offset by 180 degrees or 90 degrees to each other, wherein in each of the two or four air gaps in each case a strongly coupled magnetic field sensor is arranged.
  • interference fields can be "calculated out” with two or four staggered sensors.
  • the measuring device may comprise a carrier plate with a passage opening for the electrical conductor, wherein the magnetic field sensors are mounted on the carrier plate.
  • the support plate may for example consist of an antiferromagneti Service material.
  • the carrier plate or the ferrite core are preferably formed annularly, wherein the conductor, whose current is to be measured, is passed through the through hole of the ring.
  • the magnetic field sensors can be detachably fastened to the carrier plate or to the ferrite element, for example indirectly or directly with the aid of angle elements.
  • a detachable attachment allows a separate exchange of individual or all magnetic field sensors, if they are defective.
  • the magnetic field sensors can each be arranged on an individual printed circuit board (or measuring board) which is fastened to the carrier plate or to the ferrite element.
  • a signal conditioning circuit can be present, which processes the measurement signal of the respective magnetic field sensor before it is forwarded to the evaluation device.
  • the measuring device may also include a sensor housing in which the magnetic field sensors are housed. Prefers the evaluation device is arranged outside the sensor housing in order to avoid interference by the magnetic fields on the evaluation device.
  • the evaluation device comprises at least two evaluation units, which are connected, for example, in each case with all magnetic field sensors and operate redundantly. Due to a redundant design, measuring errors can be detected and the risk of failure of the measuring device can be reduced.
  • the invention also relates to a protection system for monitoring an electrical installation with a measuring device for measuring a current flowing through a conductor of the system.
  • the measuring device has an operating current measuring range for measuring the current flowing through the conductor during fault-free operation of the system and that the measuring device has a short-circuit current measuring range for measuring the short-circuit current flowing through the conductor during a fault condition of the system.
  • At least one weakly coupled magnetic field sensor is present for the short-circuit current measuring range and at least one strongly coupled magnetic field sensor for the operating current measuring range.
  • the invention also relates to a method of measuring a current in a conductor of an electrical installation.
  • the current flowing through the conductor is measured during fault-free operation of the system and that in the event of a fault condition of the system with a short-circuit current measuring range of the measuring device, the short-circuit current flowing through the conductor is measured.
  • At least one weakly coupled magnetic field sensor of the measuring device is used for the short-circuit current measuring range, and at least one strongly coupled magnetic field sensor of the measuring device is used for the operating current measuring range.
  • the strongly coupled magnetic field sensor is stronger coupled to the magnetic field of the conductor as the weakly coupled magnetic field sensor.
  • the measuring range of the or the strongly coupled magnetic field sensors is left, is preferably switched to the or the weakly coupled magnetic field sensors for the formation of the measured current value.
  • FIG. 1 shows a first embodiment of a measuring device according to the invention in plan view
  • FIG. 2 shows the measuring device according to FIG. 1 in a lateral view
  • FIG. 3 shows a second exemplary embodiment of a measuring device according to the invention
  • Figure 4 is an enlarged view of the in the
  • Embodiment according to Figure 3 used angle elements for holding magnetic field sensors
  • Figure 5 shows a second embodiment of angle elements which are suitable for holding the magnetic field sensors.
  • FIG. 1 shows a first exemplary embodiment of a measuring device 10 which is suitable for monitoring an energy transmission system (not further shown in FIG. 1).
  • the measuring device 10 comprises an annular ferrite core or ferrite ring 20, which is defined by four air gaps 30, 40, 50 and 60 is divided into a total of four segments 70, 80, 90 and 100.
  • a strongly coupled "internal" magnetic field sensor 110, 120, 130 and 140 is arranged, and the magnetic field sensors may, for example, be Hall sensors.
  • the internal magnetic field sensors measure the magnetic field generated by an electrical conductor 150.
  • the electric current conductor 150 passes through the annular ferrite core 20, so that in the case of a current flow through the current conductor 150, a magnetic field with essentially concentric magnetic field lines is produced in the ferrite core 20.
  • the internal magnetic field sensors 110 to 140 can also measure relatively small currents in the current conductor 150 very accurately.
  • the distance Ri and thus the magnetic coupling efficiency between the internal magnetic field sensors 110 to 140 and the current conductor 150 is selected such that the magnetic fields measured by the internal magnetic field sensors correspond to currents in the conductor 150, in a conventional error-free operation of the conductor 150 and thus at a usual error-free operation of the electrical system connected to the conductor 150 occur.
  • the rated current range of the current conductor 150 is measured.
  • the four inner magnetic field sensors 110 to 140 are arranged point-symmetrically with respect to the current conductor 150 and offset by 90 ° relative to one another.
  • This staggered arrangement makes it possible to measure the current in the current conductor 150 very accurately, because any interference fields that are "measured along" by each of the internal magnetic field sensors are evaluated as part of an evaluation of the measurement signal.
  • an evaluation device 160 which is in communication with the four internal magnetic field sensors 110 to 140 and evaluates their measurement signals, is used to "calculate out" the magnetic field sensors Way done, as described in the aforementioned German Patent Application DE 199 14 772 Al in detail.
  • the principle of calculating out interference fields can in particular be based, for example, on the fact that the current measurement signals of the pairwise opposing magnetic field sensors are added together or subtracted from each other, so that all those interference fields which are measured in phase and magnitude by the magnetic field sensors are eliminated.
  • the evaluation device 160 has a redundant design in order to guarantee the greatest possible reliability when generating the measured current value.
  • the evaluation device has two evaluation units 170 and 180 which operate independently of one another and are each connected to all four internal magnetic field sensors 110 to 140 and evaluate their measurement results.
  • the two evaluation units 170 and 180 compare their measurement results to one another via a common data connection 190, as a result of which measuring errors or disturbances can be reliably detected.
  • the measuring device 10 is also equipped with four further weakly coupled magnetic field sensors 200, 210, 220 and 230, which are formed for example by Hall sensors. These four magnetic field sensors are arranged outside, for example, above, the annular ferrite core 20 (see Fig. 2) and thus have less magnetic coupling to the current conductor 150 than the inner magnetic field sensors 110 to 140, because they are dependent on the amplification of the magnetic flux density are not affected by the annular ferrite core.
  • the magnetic field sensors 200 to 230 can thus be referred to as "external" magnetic field sensors.
  • the distance Ra of the external magnetic field sensors 200 to 230 is selected such that strong magnetic fields which occur in the case of a short-circuit current in the current conductor 150 are within the measuring range of the external magnetic field sensors and can be detected correctly by measurement.
  • the external magnetic field sensors 200 to 230 are thus arranged so far away from the current conductor 150 that the short-circuit current range of the current conductor 150 can be accurately detected quantitatively with these.
  • the four outer magnetic field sensors 200 to 230 are each connected to the two evaluation units 170 and 180 of the evaluation device 160 so that their measurement results are also detected redundantly.
  • the four external magnetic field sensors 200 to 230 are arranged symmetrically and offset by 90 ° to each other in order to carry out an out-counting of interference fields, as has already been explained in connection with the internal magnetic field sensors.
  • the corresponding computation of the interference fields takes place, for example, in the two evaluation units 170 and 180 of the evaluation device 160.
  • FIG. 2 shows a side view of the measuring device 10 according to FIG.
  • the annular ferrite core 20 and the inner magnetic field sensors 110, 120 and 130 housed in the air gaps 30, 40 and 50 can be seen.
  • the upper air gap 60 with the inner magnetic field sensor 140 accommodated therein is shown in FIG Air gap 40 and housed therein inner magnetic field sensor 120 hidden.
  • the external magnetic field sensors 200 to 230 can be seen, which outside the annular ferrite core 20th are arranged.
  • the external magnetic field sensors 200 to 230 are attached to the outside of the annular ferrite core 20.
  • Such an attachment can be realized, for example, with angle elements which are fastened, for example screwed, onto the annular ferrite core 20.
  • the external magnetic field sensors 200 to 230 are each arranged on a printed circuit board 250 and fixed by means of this to the ferrite core 20.
  • the upper magnetic field sensor 230 in FIG. 1 is concealed by the lower magnetic field sensor 210 in FIG.
  • the measuring device 10 is preferably shielded with a housing, which is not shown in the figures 1 and 2 for clarity.
  • This housing preferably encloses the annular ferrite core 20 as well as the total of eight magnetic field sensors 110 to 140 or 200 to 230.
  • the evaluation device 160 with the two redundantly operating evaluation units 170 and 180 are preferably arranged on the outside of the housing in order to provide a shielding from that in FIG Inside the housing to ensure prevailing magnetic fields.
  • the magnetic field sensors 110 to 140 and 200 to 230 may be, for example, so-called Hall sensors, which are each arranged on an associated printed circuit board.
  • FIG. 3 shows a second exemplary embodiment of a measuring device.
  • the second exemplary embodiment does not have a ferromagnetic core.
  • a carrier plate 300 made of an antiferromagnetic material is present.
  • the thickness d of the carrier plate 300 is, for example, 5 to 6 mm.
  • the carrier plate 300 is provided with a through opening 310 for the current conductor 150.
  • the support plate may for example consist of metallic material such as aluminum or of other materials such as plastic.
  • four inner magnetic field sensors 110 to 140 as well as four outer magnetic field sensors 200 to 230 can be recognized.
  • the distance Ri of the inner magnetic field sensors 110 to 140 from the conductor 150 is smaller than the distance Ra of the outer magnetic field sensors 200 to 230 from the conductor 150, so that the outer magnetic field sensors 200 to 230 are weaker coupled to the magnetic field of the conductor 150 than the inner ones Magnetic field sensors 110 to 140.
  • the magnetic field sensors are each arranged on an associated printed circuit board 330.
  • Each of these printed circuit boards 330 is in each case fastened by means of an angle element 340 on the carrier plate 300.
  • the angle elements 340 can, for example, bring about a vertical arrangement of the printed circuit boards 330 relative to the carrier plate 300.
  • circuit boards 330 are mounted on the support plate 300 each with separate angle elements 340, which are screwed both on the support plate 300 and on the respectively associated circuit board 330.
  • Such screw connections make it possible to look at each of the total of eight magnetic field sensors together with the respectively associated printed circuit board 330 if a defect or other disturbances occur.
  • the angle elements 340 according to FIG. 3 are shown once more in an enlarged representation, before they are fastened to the printed circuit board 330 and the carrier plate 300. It can be seen that the angle elements have attachment openings 350 with which they can be screwed or riveted to the carrier plate 300 and to one of the circuit boards 330, for example.
  • FIG. 5 shows an alternative embodiment of the angle elements 340. It can be seen that the angle elements 340 by punching and bending of sections 360 the support plate 300 are formed. By this punching and bending of the sections 360 opening holes 370 are formed in the support plate 300.
  • the advantage of the embodiment of the angle elements 340 shown in FIG. 5 is that they can be formed during the production of the carrier plate 300, so that additional fastening of separate angle elements to the carrier plate 300 by means of additional fastening means such as screws or the like is eliminated.
  • the embodiment according to FIG. 5 can thus be produced less expensively than that according to FIG. 4.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)

Abstract

La présente invention se réfère à un dispositif de mesure (10) pour la formation d'une valeur de mesure de courant qui indique un courant (I) s'écoulant dans un conducteur électrique (150), le dispositif de mesure comprenant au moins un capteur de champ magnétique pour la mesure d'un champ magnétique provoqué par le courant dans le conducteur et un dispositif d'évaluation (160) relié à au moins un capteur de champ magnétique pour la formation de la valeur de mesure de courant. Conformément à l'invention, il est prévu que le dispositif de mesure (10) présente au moins deux plages de mesure différentes, le dispositif de mesure (10) présentant pour l'une des plages de mesure au moins un capteur de champ magnétique fortement couplé (110-140) et pour l'autre des plages de mesure au moins un capteur de champ magnétique faiblement couplé (200-230) et le capteur de champ magnétique fortement couplé étant plus fortement couplé au champ magnétique du conducteur (150) que le capteur de champ magnétique faiblement couplé.
PCT/DE2005/002285 2005-12-14 2005-12-14 Dispositif de mesure pour la formation d'une valeur de mesure de courant Ceased WO2007068221A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/DE2005/002285 WO2007068221A1 (fr) 2005-12-14 2005-12-14 Dispositif de mesure pour la formation d'une valeur de mesure de courant
DE112005003827T DE112005003827A5 (de) 2005-12-14 2005-12-14 Messeinrichtung zum Bilden eines Strommesswerts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/DE2005/002285 WO2007068221A1 (fr) 2005-12-14 2005-12-14 Dispositif de mesure pour la formation d'une valeur de mesure de courant

Publications (1)

Publication Number Publication Date
WO2007068221A1 true WO2007068221A1 (fr) 2007-06-21

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DE (1) DE112005003827A5 (fr)
WO (1) WO2007068221A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011018530A1 (fr) * 2009-08-14 2011-02-17 Sentec Ltd Capteur de courant
ITBO20090699A1 (it) * 2009-10-28 2011-04-29 Techimp Technologies S A Strumento e procedimento per misurare il fattore di perdita di un apparato elettrico.
EP2910956A1 (fr) * 2014-01-21 2015-08-26 Comexio GmbH Dispositif de mesure de courant
EP3115793A1 (fr) * 2015-07-06 2017-01-11 ABB Technology AG Dispositif accessoire pour équipement électrique basse ou moyenne tension
WO2021175382A1 (fr) * 2020-03-03 2021-09-10 Continental Automotive Gmbh Capteur de courant
EP2960661B1 (fr) * 2014-06-26 2024-01-31 ABB S.p.A. Système modulaire de détection de courant et méthode de fabrication d'un système modulaire de détection de courant

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DE19914772A1 (de) * 1999-03-31 2000-10-12 Aeg Niederspannungstech Gmbh Strommeßaufnehmer
WO2004086063A1 (fr) * 2003-03-27 2004-10-07 Suparules Limited Appareil de mesure d'un courant alternatif dans un cable

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JPS57128854A (en) * 1981-02-02 1982-08-10 Mitsubishi Electric Corp Current transformer
JPS6298267A (ja) * 1985-10-25 1987-05-07 Matsushita Electric Works Ltd 電流検出器
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JPH08194016A (ja) * 1995-01-19 1996-07-30 Fuji Electric Co Ltd 電流センシング装置
DE19914772A1 (de) * 1999-03-31 2000-10-12 Aeg Niederspannungstech Gmbh Strommeßaufnehmer
WO2004086063A1 (fr) * 2003-03-27 2004-10-07 Suparules Limited Appareil de mesure d'un courant alternatif dans un cable

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Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011018530A1 (fr) * 2009-08-14 2011-02-17 Sentec Ltd Capteur de courant
US8791694B2 (en) 2009-08-14 2014-07-29 Sentec Ltd. Current sensor arrangement
US8890509B2 (en) 2009-08-14 2014-11-18 Sentec Ltd. Current sensor
ITBO20090699A1 (it) * 2009-10-28 2011-04-29 Techimp Technologies S A Strumento e procedimento per misurare il fattore di perdita di un apparato elettrico.
WO2011051890A1 (fr) 2009-10-28 2011-05-05 Techimp Technologies S.R.L. Instrument et procédé de mesure du facteur de perte d'un appareil électrique
CN102597791A (zh) * 2009-10-28 2012-07-18 特英普科技有限公司 用于测量电气设备的损耗因子的仪器和方法
CN102597791B (zh) * 2009-10-28 2014-10-15 特英普科技有限公司 用于测量电气设备的损耗因子的仪器和方法
US8972212B2 (en) 2009-10-28 2015-03-03 Techimp Hq S.R.L. Instrument and method for measuring the loss factor of an electrical apparatus
EP2910956A1 (fr) * 2014-01-21 2015-08-26 Comexio GmbH Dispositif de mesure de courant
EP2960661B1 (fr) * 2014-06-26 2024-01-31 ABB S.p.A. Système modulaire de détection de courant et méthode de fabrication d'un système modulaire de détection de courant
EP3115793A1 (fr) * 2015-07-06 2017-01-11 ABB Technology AG Dispositif accessoire pour équipement électrique basse ou moyenne tension
WO2017005473A1 (fr) * 2015-07-06 2017-01-12 Abb Technology Ag Dispositif accessoire pour équipement électrique à basse ou moyenne tension
US10527652B2 (en) 2015-07-06 2020-01-07 Abb Schweiz Ag Accessory device for detecting current flow in an electric cable
WO2021175382A1 (fr) * 2020-03-03 2021-09-10 Continental Automotive Gmbh Capteur de courant
JP2023513369A (ja) * 2020-03-03 2023-03-30 コンチネンタル・オートモーティヴ・テクノロジーズ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング 電流センサ
US20230119215A1 (en) * 2020-03-03 2023-04-20 Continental Automotive Technologies GmbH Current sensor
JP7549027B2 (ja) 2020-03-03 2024-09-10 コンチネンタル・オートモーティヴ・テクノロジーズ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング 電流センサ

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