WO2013026423A1 - Système combiné de mesure et de détection - Google Patents

Système combiné de mesure et de détection Download PDF

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Publication number
WO2013026423A1
WO2013026423A1 PCT/CZ2012/000075 CZ2012000075W WO2013026423A1 WO 2013026423 A1 WO2013026423 A1 WO 2013026423A1 CZ 2012000075 W CZ2012000075 W CZ 2012000075W WO 2013026423 A1 WO2013026423 A1 WO 2013026423A1
Authority
WO
WIPO (PCT)
Prior art keywords
primary conductor
electric current
conductive electrode
electric voltage
sensor
Prior art date
Application number
PCT/CZ2012/000075
Other languages
English (en)
Inventor
Rarek JAVORA
Petr VELESIK
Original Assignee
Abb Technology Ag
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 Abb Technology Ag filed Critical Abb Technology Ag
Publication of WO2013026423A1 publication Critical patent/WO2013026423A1/fr

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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
    • G01R15/142—Arrangements for simultaneous measurements of several parameters employing techniques covered by groups G01R15/14 - G01R15/26
    • 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

Definitions

  • the technical solution refers to a combined measuring and detecting system on an electric conductor including at least one sensor of electric current having a shape of a ring around the electric conductor and/or at least one sensor of electric voltage having a shape of a ring around the electric conductor.
  • measuring transformers or any other detecting elements Construction of measuring transformers or any other detecting elements is usually designed so that it may suit to a given solution. In case that the measuring
  • transformer is designed for one application, it is capable of meeting limiting values of a withstand voltage for this application.
  • the withstand voltage value may not any longer meet appropriate requirements and therefore it may be difficult to use such a measuring transformer on given unfavourable conditions.
  • electric fields from surroundings can have an influence on measured values and in such way to influence measurement accuracy.
  • measuring transformers As currently a construction of measuring transformers is designed for a specified application, it is necessary, provided that the measuring transformer is to be used for a different application, to perform dielectric tests to find out whether dielectric resistance of the whole assembly is sufficient. If it is found out that it is not the case, it is necessary to design external apparatuses, special arrangement or additional insulation in order to reach a sufficient dielectric resistance of the whole assembly.
  • Various solutions for the same measuring transformer in various applications can be necessary to meet the same requirements.
  • a combined measuring and detecting system on a primary conductor including at least one sensor of electric current having a shape of a ring around the primary conductor and/or at least one sensor of electric voltage having a shape of a ring around the primary conductor.
  • the substance of the technical solution is that a space between the electric current sensor and/or the electric voltage sensor and the primary conductor is at least from one side separated from surrounding area by a conductive electrode having a shape of a ring around the primary conductor.
  • this combined measuring and detecting system includes both the electric current sensor and the electric voltage sensor.
  • the ring of the conductive electrode has an inner circular edge and an outer circular edge, and the conductive electrode surface between the inner and the outer circular edges forms an angle ranging from 60° to 120° with an axis of the primary conductor.
  • the conductive electrode is adjacent by its inner circular edge to the primary conductor and is conductively connected to it, and its outer circular edge is farther from the primary conductor surface than the inner side of the electric current sensor.
  • the electric voltage sensor is arranged between the primary conductor and the electric current sensor in order to shield the electric voltage sensor from external influences.
  • the conductive electrode at its outer circular edge is bent in the direction outwards from the electric current and electric voltage sensors or rolled into a hem having a circular cross-section.
  • the combined measuring and detecting system includes both the electric current sensor and the electric voltage sensor.
  • the ring of the conductive electrode has an inner circular edge and an outer circular edge, and the conductive electrode surface between the inner and the outer circular edges forms an angle ranging from 60° to 120° with an axis of the primary conductor.
  • the conductive electrode is attached by its outer circular edge to the electric current sensor and is earthed and the electric voltage sensor is arranged between the primary conductor and the electric current sensor in order to shield the electric voltage sensor from external influences.
  • the conductive electrode at its inner circular edge in a distance from the primary conductor surface is bent in the direction towards the electric current and electric voltage sensors or rolled into a hem having a circular cross-section.
  • Another advantageous embodiment of the combined measuring and detecting system includes both the electric current sensor and the electric voltage sensor. It is likewise true that the ring of the conductive electrode has the inner circular edge and the outer circular edge, and the conductive electrode surface between the inner and the outer circular edges forms an angle ranging from 60° to 120° with the axis of the primary conductor.
  • the conductive electrode is on a floating potential and the electric voltage sensor is arranged between the primary conductor and the electric current meter in order to shield the electric voltage sensor from external influences.
  • the conductive electrode at its inner circular edge in a distance from the primary conductor surface is bent in the direction to the electric current and electric voltage sensors or rolled into a hem having a circular cross- section.
  • the conductive electrodes in the combined measuring and detecting system are arranged at both sides of the area between the electric current and the electric voltage sensors and the primary conductor.
  • the electric current sensor is implemented as a current transformer or as a low-performance current sensor.
  • the electric voltage sensor is implemented as a capacitance divider and/or a resistor divider.
  • the curvature radius of the bent or rolled end of the conductive electrode is greater than 1 mm.
  • the inner radius of the conductive electrode ring is smaller than the distance of the ring-shaped voltage sensor from the axis of the primary conductor.
  • the electric voltage and electric current sensors assembly with the conductive electrodes are embedded in an insulating material, whereas the distance of the electric voltage and electric current sensors as well as the conductive electrodes from the insulating material surface is greater than 1 mm.
  • the combined measuring and detecting system includes a temperature sensor in addition to the electric current sensor or electric voltage sensor.
  • Fig. 1 is a partial cross-section of the combined measuring and detecting system with the conductive electrode connected conductively to the primary conductor
  • Fig. 2 is a partial cross-section of the combined measuring and detecting system with the conductive electrode connected to the electric current sensor.
  • the first exemplary embodiment of the combined measuring and detecting system 1 on the primary conductor 3 is depicted in Fig. 1.
  • This combined measuring and detecting system 1 includes the electric current sensor 2 in the shape of the ring around the primary conductor 3 and the electric voltage sensor 6 in the shape of the ring around the primary conductor 3.
  • Two conductive electrodes 4 in the shape of the ring around the primary conductor 3 are connected conductively to the primary conductor 3, the conductive electrodes 4 separating the space between the electric current sensor 2 and the electric voltage sensor 6 from surrounding area. Specific resistance of the conductive electrodes 4 material can tend to zero but it can reach up to tens or hundreds of kQ.
  • the ring of the conductive electrode 4 has the inner circular edge 7 and the outer circular edge 8 and the area of the conductive electrode 4 between the inner and the outer circular edges 7 and 8 forms an angle of 90° with the axis 9 of the primary conductor 3.
  • the conductive electrode 4 can incline even at another angle, i. g. angle ranging between 60° to 120°, and thus create a lateral area of a truncated cone if it meets the requirement to shield the electric voltage sensor 6 from perturbative influences, especially from the direction parallel with the axis 9 of the primary conductor 3. Owing to easy assembling it is better if the surface of the conductive electrode 4 is perpendicular to the axis 9 of the primary conductor 3.
  • the conductive electrode 4 is adjacent by its inner circular edge 7 to the primary conductor 3 and is conductively connected to it, and the outer circular edge 8 of the conductive electrode 4 is farther from the primary conductor 3 surface than the inner side of the sensor 2 of electric current.
  • the electric voltage sensor 6 is arranged between the primary conductor 3 and the electric current sensor 2 in order to shield the electric voltage sensor 2 from external influences.
  • the conductive electrode 4 is bent at its outer circular edge 8 in the direction from the electric current and electric voltage sensors 2 and 6, respectively.
  • the conductive electrode 4 at its outer circular edge 8 can be rolled into a hem of a circular cross-section so that the arrangement is created in which the possibility of dielectric discharges from the outer circular edge 8 of the conductive electrode 4 is minimised.
  • both the bending and the rolling of the conductive electrode 4 at its outer circular edge 8 have a radius R of a curvature greater than 1 mm.
  • the electric voltage sensor 6 is arranged between the electric current sensor 2 and the primary conductor 3 so that it is shielded from perturbative influences from outside by the ring-shaped electric current sensor 2. Besides it is shielded even by the conductive electrodes 4 from both sides in the direction parallel to the axis 9 of the primary conductor 3.
  • the outer radius B of the ring-shaped conductive electrode 4 is greater than the inner radius A of the ring-shaped electric current sensor 2.
  • the complete combined measuring and detecting system 1 is imbedded in a block 10 of an insulating material 5, at best of a permitivity greater than , whereas both the distance D of the electric current sensor 2 from the block 10 surface and the distance E of the conductive electrode 4 from the block 10 surface are greater than 1 mm. Also the radius S of the electric voltage sensor 6 is greater than 1 mm.
  • the second exemplary embodiment of the combined measuring and detecting system 1 on the primary conductor 3 is depicted in Fig. 2.
  • This embodiment differs from the first one in that the conductive electrodes 4 are connected to the electric current sensor 2 and thus they are not on the voltage of the primary conductor 3.
  • the conductive electrodes 4 can be either earthed together with the electric current sensor 2 or they can be on another or floating voltage together with the electric current sensor 2.
  • the conductive electrodes 4 are ring-shaped and have the bent or rolled part on their inner edges, which are at a distance C from the primary conductor 3 surface.
  • the electric voltage sensor 6 is arranged between the electric current sensor 2 and the primary conductor 3 so that it is shielded from perturbative influences from outside by the ring-shaped electric current sensor 2.
  • the complete combined measuring and detecting system 1 is imbedded in the block 10 of the insulating material 5, whereas both the distance D of the electric current sensor 2 from the block 0 surface and the distance E of the conductive electrode 4 from the block 10 surface are greater than 1 mm. Even in this case the radius S of the electric voltage sensor 6 is greater than 1 mm.
  • the combined measuring and detecting system 1 arranged on the primary conductor 3 measures voltage and current of this primary conductor 3.
  • the conductive electrodes 4 keep a constant voltage, namely either a voltage identical with the voltage on the primary conductor 3 as in the first exemplary embodiment, or a zero voltage or floating voltage as in the second exemplary embodiment, what causes a favourable behaviour of electric field between them.
  • the electric voltage sensor 6, which is arranged between them, is thus in a homogenous electric field that is not influenced by the shielded external influences, all the more so, that the electric voltage sensor 6 is shielded from the side perpendicular to the axis 9 of the primary conductor 3 by the electric current sensor 2.
  • the voltage measuring is stabilized by this arrangement and is not subject to accidental deviations and interferences caused by various applications, which increases its accuracy, reliability and applicability.
  • the combined measuring and detecting system according to the technical solution can be advantageously used for measuring of electric current and voltage in heavy current electrical engineering, e.g. for switchboards.

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

Abstract

L'invention concerne un système combiné de mesure et de détection (1) sur un conducteur primaire (3), qui comprend au moins un détecteur de courant électrique (2) sous la forme d'un anneau autour du conducteur primaire (3) et/ou un détecteur de tension électrique (6) sous la forme d'un anneau autour du conducteur primaire (3). L'espace entre respectivement le détecteur de courant électrique et/ou de tension électrique (2 et/ou 6) et le conducteur primaire (3) est séparé d'une zone environnante au moins d'un côté par une électrode conductrice (4) sous la forme d'un anneau autour du conducteur primaire (3).
PCT/CZ2012/000075 2011-08-23 2012-08-08 Système combiné de mesure et de détection WO2013026423A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CZ201124752U CZ23097U1 (cs) 2011-08-23 2011-08-23 Kombinovaný mericí a detekcní systém
CZPUV2011-24752 2011-08-23

Publications (1)

Publication Number Publication Date
WO2013026423A1 true WO2013026423A1 (fr) 2013-02-28

Family

ID=45370316

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CZ2012/000075 WO2013026423A1 (fr) 2011-08-23 2012-08-08 Système combiné de mesure et de détection

Country Status (2)

Country Link
CZ (1) CZ23097U1 (fr)
WO (1) WO2013026423A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2722678A1 (fr) * 2012-10-18 2014-04-23 ABB Technology AG Dispositif de détection de courant et/ou de tension pour utilisation intégrante
EP3051298A1 (fr) 2015-02-02 2016-08-03 Schneider Electric Industries SAS Capteur de courant et réseau électrique comprenant un tel capteur de courant
US11543436B2 (en) 2018-03-30 2023-01-03 G & W Electric Company Constructive system regarding a capacitive sensor
US11644484B2 (en) 2018-12-17 2023-05-09 G & W Electric Company Electrical sensor assembly
US11740261B2 (en) 2016-10-14 2023-08-29 G & W Electric Company Capacitive voltage sensor assembly
US11774481B2 (en) 2018-12-17 2023-10-03 G & W Electric Company Electrical sensor assembly

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3990001A (en) * 1973-05-17 1976-11-02 Siemens Aktiengesellschaft Measuring transformer for installation in the metal enclosure of a switching installation
EP0522303A2 (fr) * 1991-06-29 1993-01-13 Asea Brown Boveri Ag Convertisseur combiné pour courant et tension pour une installation à haute tension encapsulée en métal et isolée à gaz
DE4435864A1 (de) * 1994-10-07 1996-04-11 Pfisterer Elektrotech Karl Garnitur in Form einer Durchführung oder einer Steckbuchse für Kabelstecker
EP1261091A1 (fr) * 2000-03-01 2002-11-27 Hitachi, Ltd. Dispositif etanche aux gaz et procede de determination du taux de defaillances
US20090058398A1 (en) * 2007-08-31 2009-03-05 Daihen Corporation Current/voltage detection printed board and current/voltage detector
EP2051084A1 (fr) * 2006-12-06 2009-04-22 S.G.E. Società Generale di Elettronica S.r.l. Dispositif de mesure de quantité électrique pour lignes de transport d'énergie
EP2136216A1 (fr) * 2008-06-19 2009-12-23 ABB Technology AG Dispositif de mesure électrique combinée
WO2010128385A1 (fr) * 2009-05-08 2010-11-11 Eaton Corporation Système et procédé pour détecter une tension dans des applications de moyenne à haute tension

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3990001A (en) * 1973-05-17 1976-11-02 Siemens Aktiengesellschaft Measuring transformer for installation in the metal enclosure of a switching installation
EP0522303A2 (fr) * 1991-06-29 1993-01-13 Asea Brown Boveri Ag Convertisseur combiné pour courant et tension pour une installation à haute tension encapsulée en métal et isolée à gaz
DE4435864A1 (de) * 1994-10-07 1996-04-11 Pfisterer Elektrotech Karl Garnitur in Form einer Durchführung oder einer Steckbuchse für Kabelstecker
EP1261091A1 (fr) * 2000-03-01 2002-11-27 Hitachi, Ltd. Dispositif etanche aux gaz et procede de determination du taux de defaillances
EP2051084A1 (fr) * 2006-12-06 2009-04-22 S.G.E. Società Generale di Elettronica S.r.l. Dispositif de mesure de quantité électrique pour lignes de transport d'énergie
US20090058398A1 (en) * 2007-08-31 2009-03-05 Daihen Corporation Current/voltage detection printed board and current/voltage detector
EP2136216A1 (fr) * 2008-06-19 2009-12-23 ABB Technology AG Dispositif de mesure électrique combinée
WO2010128385A1 (fr) * 2009-05-08 2010-11-11 Eaton Corporation Système et procédé pour détecter une tension dans des applications de moyenne à haute tension

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2722678A1 (fr) * 2012-10-18 2014-04-23 ABB Technology AG Dispositif de détection de courant et/ou de tension pour utilisation intégrante
WO2014060106A1 (fr) * 2012-10-18 2014-04-24 Abb Technology Ag Dispositif de détection de courant et/ou tension pour une utilisation intégrative
EP3051298A1 (fr) 2015-02-02 2016-08-03 Schneider Electric Industries SAS Capteur de courant et réseau électrique comprenant un tel capteur de courant
FR3032276A1 (fr) * 2015-02-02 2016-08-05 Schneider Electric Ind Sas Capteur de courant et reseau electrique comprenant un tel capteur de courant
US9897631B2 (en) 2015-02-02 2018-02-20 Schneider Electric Industries Sas Current sensor and electric network comprising such a current sensor
US11740261B2 (en) 2016-10-14 2023-08-29 G & W Electric Company Capacitive voltage sensor assembly
US11543436B2 (en) 2018-03-30 2023-01-03 G & W Electric Company Constructive system regarding a capacitive sensor
US11815529B2 (en) 2018-03-30 2023-11-14 G & W Electric Company Constructive system regarding a capacitive sensor
US11644484B2 (en) 2018-12-17 2023-05-09 G & W Electric Company Electrical sensor assembly
US11774481B2 (en) 2018-12-17 2023-10-03 G & W Electric Company Electrical sensor assembly

Also Published As

Publication number Publication date
CZ23097U1 (cs) 2011-12-19

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