EP0561717B1 - Measuring combination with current sensor and power supply transformer - Google Patents

Measuring combination with current sensor and power supply transformer Download PDF

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Publication number
EP0561717B1
EP0561717B1 EP93420101A EP93420101A EP0561717B1 EP 0561717 B1 EP0561717 B1 EP 0561717B1 EP 93420101 A EP93420101 A EP 93420101A EP 93420101 A EP93420101 A EP 93420101A EP 0561717 B1 EP0561717 B1 EP 0561717B1
Authority
EP
European Patent Office
Prior art keywords
secondary winding
magnetic circuit
current sensor
orifice
assembly according
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.)
Expired - Lifetime
Application number
EP93420101A
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German (de)
French (fr)
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EP0561717A1 (en
Inventor
Pierre Schueller
Pierre Laffont
Pascal Houbre
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.)
Schneider Electric SE
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Schneider Electric SE
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Publication date
Application filed by Schneider Electric SE filed Critical Schneider Electric SE
Publication of EP0561717A1 publication Critical patent/EP0561717A1/en
Application granted granted Critical
Publication of EP0561717B1 publication Critical patent/EP0561717B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/20—Instruments transformers
    • H01F38/22—Instruments transformers for single phase ac
    • H01F38/28—Current transformers
    • H01F38/30—Constructions
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/20—Instruments transformers
    • H01F38/22—Instruments transformers for single phase ac
    • H01F38/28—Current transformers
    • H01F38/30—Constructions
    • H01F2038/305—Constructions with toroidal magnetic core

Definitions

  • the invention relates to a combined measurement formed by the association of a non-magnetic toroid current sensor having a first secondary winding intended to deliver a measurement signal proportional to the derivative of the current flowing through a common primary conductor passing through an orifice , and a supply transformer comprising a magnetic circuit made of ferromagnetic material, which is crossed by said primary conductor, and carrying a second secondary winding capable of supplying supply energy, in particular to an electronic trip device of an electric circuit breaker .
  • the object of the invention is to reduce the size of a measuring instrument for a trigger with own current.
  • the measuring instrument is characterized in that the current sensor is placed inside the magnetic circuit of the supply transformer with a coaxial arrangement around the orifice, and that the first secondary winding is located closer to the primary conductor than the second secondary winding, which is located in an area with a weak magnetic field.
  • This arrangement of the current sensor makes it possible to obtain a maximum measurement signal at the terminals of the first secondary winding, while the second secondary winding is arranged to limit the secondary intensity of the supply transformer in the event of the appearance of a current. short circuit in the primary conductor.
  • the magnetic circuit is arranged in a closed frame having a rectilinear branch for supporting the second secondary winding, which extends orthogonally to the orifice for the passage of the primary conductor.
  • the magnetic circuit opposite to the straight branch, a part in the shape of a vault, the internal wall of which is in the vicinity of the current sensor.
  • the handset is protected by an insulating carcass formed by the assembly of two half-shells coming into abutment in the median plane of symmetry.
  • Figure 1 is an elevational view of the measuring instrument according to the invention.
  • Figure 2 shows a sectional view along line 2-2 of Figure 1.
  • FIG. 3 represents a mode of installation of the measuring instrument on a primary conductor in a loop.
  • Figure 4 shows the handset inserted into a compartment of a circuit breaker box.
  • the combined instrument 10 is formed by the association of a current sensor 12 and a power transformer 14, arranged around an orifice 13 capable of being traversed by a conductor primary 15.
  • the latter is common to the sensor 12 and to the transformer 14, and is formed by a phase conductor of an electrical device with electronic trigger (not shown).
  • the current sensor 12 of the handset 10 comprises a closed non-magnetic toroid 16 of the Rogowski type, on which is wound a first secondary winding 18 intended to deliver a measurement signal to a processing circuit (not shown) of the trip device.
  • the low power measurement signal is proportional to the derivative of the current flowing through the primary conductor 15.
  • the adjacent supply transformer 14 comprises a magnetic circuit 20 made of ferromagnetic material, and a second secondary winding 22 intended to apply the supply voltage to the electronic trip device.
  • the magnetic circuit 20 is formed by a closed frame having at the base a rectilinear branch on which is wound the second secondary winding 22 extending orthogonally to the circular orifice 13.
  • the frame is constituted by two stacks of magnetic sheets assembled symmetrically with respect to the median plane of trace symmetry xx '.
  • the upper vaulted part of the frame has a semi-circular shape substantially centered on the axis yy 'of the orifice 13.
  • the instrument panel 10 is protected by the assembly of two half-shells 24.26 in molded insulating material, intended to ensure isolation from the surrounding environment.
  • the half-shells 24, 26 come into abutment in the median plane of symmetry.
  • the first secondary winding 18 of the sensor 12 is formed by a succession of contiguous turns distributed over the entire periphery of the non-magnetic core 16.
  • the wound toroid 16 is placed inside the magnetic circuit 20 of the transformer 14 with a coaxial arrangement around the orifice 13 for the passage of the primary conductor 15.
  • the toroid assembly 16 and the first secondary winding 18 extends orthogonally to the second secondary winding 22 by matching the inside of the upper vaulted portion of the magnetic circuit 20.
  • the non-magnetic torus 16 of the current sensor 12 directly surrounds the primary conductor 15 to obtain at the terminals of the first secondary winding 18, a maximum measurement signal as a function of a predetermined primary current.
  • the second secondary winding 22 of the supply transformer 14 is further from the primary conductor 15 than the toroid 16 and is in an area of weak magnetic field. This results in a limitation of the intensity supplied by the winding 22 in the event of a short-circuit current appearing in the primary conductor 15.
  • the primary conductor 15 is shaped according to a loop 28, with an arrangement of the second secondary winding 22 outside the loop.
  • the measuring device 10 is inserted into a compartment 30 of parallelepiped shape of an insulating box for the electrical equipment.
  • the upper vaulted part of the magnetic circuit 20 leaves two free spaces 32, 34 in the corners of the compartment 30 allowing the winding for several passages of the primary conductor 15 in the orifice 13.
  • the section of the primary conductor 15 corresponds to ratings less than 100 Amps.
  • the space occupied by the measuring device 10 in a molded switchgear box, in particular of a circuit breaker with electronic trip device with its own current, is reduced to a minimum.

Description

L'invention est relative à un combiné de mesure formé par l'association d'un capteur de courant à tore amagnétique ayant un premier enroulement secondaire destiné à délivrer un signal de mesure proportionnel à la dérivée du courant parcourant un conducteur primaire commun traversant un orifice, et d'un transformateur d'alimentation comportant un circuit magnétique en matériau ferromagnétique, lequel est traversé par ledit conducteur primaire, et portant un deuxième enroulement secondaire susceptible de fournir une énergie d'alimentation, notamment à un déclencheur électronique d'un disjoncteur électrique.The invention relates to a combined measurement formed by the association of a non-magnetic toroid current sensor having a first secondary winding intended to deliver a measurement signal proportional to the derivative of the current flowing through a common primary conductor passing through an orifice , and a supply transformer comprising a magnetic circuit made of ferromagnetic material, which is crossed by said primary conductor, and carrying a second secondary winding capable of supplying supply energy, in particular to an electronic trip device of an electric circuit breaker .

Un tel dispositif est connu du document FR-A-2-599.195 de la demanderesse, dans lequel le capteur de courant à tore de Rogowski, et le transformateur d'alimentation sont disposés côte à côte et coaxialement autour de la barre du conducteur primaire. Etant donné que la place réservée au déclencheur dans le boîtier du disjoncteur devient de plus en plus réduite, une disposition côte à côte du capteur et du transformateur devient inadéquate.Such a device is known from document FR-A-2-599.195 of the applicant, in which the Rogowski toroid current sensor and the power transformer are arranged side by side and coaxially around the bar of the primary conductor. As the space reserved for the trip unit in the circuit-breaker box becomes more and more reduced, a side-by-side arrangement of the sensor and the transformer becomes inadequate.

L'objet de l'invention consiste à réduire l'encombrement d'un combiné de mesure pour un déclencheur à propre courant.The object of the invention is to reduce the size of a measuring instrument for a trigger with own current.

Le combiné de mesure est caractérisé en ce que le capteur de courant est disposé à l'intérieur du circuit magnétique du transformateur d'alimentation avec une disposition coaxiale autour de l'orifice, et que le premier enroulement secondaire est situé plus près du conducteur primaire que le deuxième enroulement secondaire, lequel est situé dans une zone à faible champ magnétique.The measuring instrument is characterized in that the current sensor is placed inside the magnetic circuit of the supply transformer with a coaxial arrangement around the orifice, and that the first secondary winding is located closer to the primary conductor than the second secondary winding, which is located in an area with a weak magnetic field.

Cette disposition du capteur de courant permet d'obtenir un signal de mesure maximum aux bornes du premier enroulement secondaire, alors que le deuxième enroulement secondaire est agencé pour limiter l'intensité secondaire du transformateur d'alimentation en cas d'apparition d'un courant de court-circuit dans le conducteur primaire.This arrangement of the current sensor makes it possible to obtain a maximum measurement signal at the terminals of the first secondary winding, while the second secondary winding is arranged to limit the secondary intensity of the supply transformer in the event of the appearance of a current. short circuit in the primary conductor.

Le circuit magnétique est agencé en cadre fermé ayant une branche rectiligne de support du deuxième enroulement secondaire, lequel s'étend orthogonalement à l'orifice de passage du conducteur primaire. Le circuit magnétique comporte à l'opposé de la branche rectiligne, une partie en forme de voûte, dont la paroi interne se trouve au voisinage du capteur de courant.The magnetic circuit is arranged in a closed frame having a rectilinear branch for supporting the second secondary winding, which extends orthogonally to the orifice for the passage of the primary conductor. The magnetic circuit, opposite to the straight branch, a part in the shape of a vault, the internal wall of which is in the vicinity of the current sensor.

La protection du combiné est assurée par une carcasse isolante formée par l'assemblage de deux demi-coquilles venant en aboutement dans le plan médian de symétrie.The handset is protected by an insulating carcass formed by the assembly of two half-shells coming into abutment in the median plane of symmetry.

D'autres avantages et caractéristiques ressortiront plus clairement de la description qui va suivre d'un mode de réalisation de l'invention, donné à titre d'exemple non limitatif, et représenté aux dessins annexés, dans lesquels:Other advantages and characteristics will emerge more clearly from the description which follows of an embodiment of the invention, given by way of nonlimiting example, and represented in the appended drawings, in which:

La figure 1 est une vue en élévation du combiné de mesure selon l'invention.Figure 1 is an elevational view of the measuring instrument according to the invention.

La figure 2 montre une vue en coupe selon la ligne 2-2 de la figure 1.Figure 2 shows a sectional view along line 2-2 of Figure 1.

La figure 3 représente un mode d'installation du combiné de mesure sur un conducteur primaire en boucle.FIG. 3 represents a mode of installation of the measuring instrument on a primary conductor in a loop.

La figure 4 montre le combiné inséré dans un compartiment d'un boîtier de disjoncteur.Figure 4 shows the handset inserted into a compartment of a circuit breaker box.

Sur les figures 1 et 2, le combiné de mesure 10 est formé par l'association d'un capteur de courant 12 et d'un transformateur d'alimentation 14, agencée autour d'un orifice 13 susceptible d'être traversé par un conducteur primaire 15. Ce dernier est commun au capteur 12 et au transformateur 14, et est formé par un conducteur de phase d'un appareil électrique à déclencheur électronique (non représenté). Le capteur de courant 12 du combiné 10 comprend un tore amagnétique 16 fermé du type Rogowski, sur lequel est bobiné un premier enroulement secondaire 18 destiné à délivrer un signal de mesure à un circuit de traitement (non représenté) du déclencheur. Le signal de mesure de faible puissance est proportionnel à la dérivée du courant parcourant le conducteur primaire 15.In FIGS. 1 and 2, the combined instrument 10 is formed by the association of a current sensor 12 and a power transformer 14, arranged around an orifice 13 capable of being traversed by a conductor primary 15. The latter is common to the sensor 12 and to the transformer 14, and is formed by a phase conductor of an electrical device with electronic trigger (not shown). The current sensor 12 of the handset 10 comprises a closed non-magnetic toroid 16 of the Rogowski type, on which is wound a first secondary winding 18 intended to deliver a measurement signal to a processing circuit (not shown) of the trip device. The low power measurement signal is proportional to the derivative of the current flowing through the primary conductor 15.

Le transformateur d'alimentation 14 adjacent comporte un circuit magnétique 20 en matériau ferromagnétique, et un deuxième enroulement secondaire 22 destiné à appliquer la tension d'alimentation au déclencheur électronique. Le circuit magnétique 20 est formé par un cadre fermé ayant à la base une branche rectiligne sur laquelle est bobiné le deuxième enroulement secondaire 22 s'étendant orthogonalement à l'orifice 13 circulaire. La cadre est constitué par deux empilements de tôles magnétiques assemblées symétriquement par rapport au plan médian de symétrie de trace xx'. La partie supérieure en voûte du cadre présente une forme semi-circulaire sensiblement centrée sur l'axe yy' de l'orifice 13. Le combiné 10 est protégé par l'assemblage de deux demi-coquilles 24,26 en matériau isolant moulé, destinées à assurer l'isolement par rapport au milieu environnant. Les demi-coquilles 24,26 viennent en aboutement dans le plan médian de symétrie.The adjacent supply transformer 14 comprises a magnetic circuit 20 made of ferromagnetic material, and a second secondary winding 22 intended to apply the supply voltage to the electronic trip device. The magnetic circuit 20 is formed by a closed frame having at the base a rectilinear branch on which is wound the second secondary winding 22 extending orthogonally to the circular orifice 13. The frame is constituted by two stacks of magnetic sheets assembled symmetrically with respect to the median plane of trace symmetry xx '. The upper vaulted part of the frame has a semi-circular shape substantially centered on the axis yy 'of the orifice 13. The instrument panel 10 is protected by the assembly of two half-shells 24.26 in molded insulating material, intended to ensure isolation from the surrounding environment. The half-shells 24, 26 come into abutment in the median plane of symmetry.

Le premier enroulement secondaire 18 du capteur 12 est formé par une succession de spires jointives réparties sur tout le pourtour du tore 16 amagnétique. Le tore 16 bobiné est placé à l'intérieur du circuit magnétique 20 du transformateur 14 avec une disposition coaxiale autour de l'orifice 13 de passage du conducteur primaire 15.The first secondary winding 18 of the sensor 12 is formed by a succession of contiguous turns distributed over the entire periphery of the non-magnetic core 16. The wound toroid 16 is placed inside the magnetic circuit 20 of the transformer 14 with a coaxial arrangement around the orifice 13 for the passage of the primary conductor 15.

L'ensemble tore 16 et le premier enroulement secondaire 18 s'étend orthogonalement au deuxième enroulement secondaire 22 en épousant l'intérieur de la partie supérieure en voûte du circuit magnétique 20. La tore 16 amagnétique du capteur de courant 12 entoure directement le conducteur primaire 15 pour obtenir aux bornes du premier enroulement secondaire 18, un signal de mesure maximum en fonction d'un courant primaire prédéterminé. La largeur L du tore 16 de Rogowski mesurée le long de l'axe yy' correspond sensiblement à la dimension du deuxième enroulement secondaire 22 mesurée le long de cet axe YY'.The toroid assembly 16 and the first secondary winding 18 extends orthogonally to the second secondary winding 22 by matching the inside of the upper vaulted portion of the magnetic circuit 20. The non-magnetic torus 16 of the current sensor 12 directly surrounds the primary conductor 15 to obtain at the terminals of the first secondary winding 18, a maximum measurement signal as a function of a predetermined primary current. The width L of the Rogowski torus 16 measured along the axis yy 'corresponds substantially to the dimension of the second secondary winding 22 measured along this axis YY'.

Le deuxième enroulement secondaire 22 du transformateur d'alimentation 14 est plus éloigné du conducteur primaire 15 que le tore 16 et se trouve dans une zone de faible champ magnétique. Il en résulte une limitation de l'intensité fournie par l'enroulement 22 en cas d'apparition d'un courant de court-circuit dans le conducteur primaire 15.The second secondary winding 22 of the supply transformer 14 is further from the primary conductor 15 than the toroid 16 and is in an area of weak magnetic field. This results in a limitation of the intensity supplied by the winding 22 in the event of a short-circuit current appearing in the primary conductor 15.

Sur la figure 3, le conducteur primaire 15 est conformé selon une boucle 28, avec une disposition du deuxième enroulement secondaire 22 à l'extérieur de la boucle.In FIG. 3, the primary conductor 15 is shaped according to a loop 28, with an arrangement of the second secondary winding 22 outside the loop.

En référénce à la figure 4, le combiné de mesure 10 est inséré dans un compartiment 30 de forme parallélépipédique d'un boîtier isolant de l'appareillage électrique. La partie supérieure en voûte du circuit magnétique 20 laisse subsister dans les coins du compartiment 30, deux volumes libres 32,34 autorisant le bobinage pour plusieurs passages du conducteur primaire 15 dans l'orifice 13. La section du conducteur primaire 15 correspond à des calibres inférieurs à 100 Ampères.With reference to FIG. 4, the measuring device 10 is inserted into a compartment 30 of parallelepiped shape of an insulating box for the electrical equipment. The upper vaulted part of the magnetic circuit 20 leaves two free spaces 32, 34 in the corners of the compartment 30 allowing the winding for several passages of the primary conductor 15 in the orifice 13. The section of the primary conductor 15 corresponds to ratings less than 100 Amps.

L'encombrement occupé par le combiné de mesure 10 dans un boîtier moulé d'appareillage, notamment d'un disjoncteur à déclencheur électronique à propre courant, est réduit au minimum.The space occupied by the measuring device 10 in a molded switchgear box, in particular of a circuit breaker with electronic trip device with its own current, is reduced to a minimum.

Claims (6)

  1. A measuring assembly formed by association of a current sensor (12) with a non-magnetic toroid (16) having a first secondary winding (18) designed to deliver a measuring signal proportional to the derivative of the current flowing in a common pnmary conductor (15) passing through an orifice (13), and a supply transformer (14) comprising a magnetic circuit (20) made of ferromagnetic material, through which said primary conductor (15) passes, and bearing a second secondary winding (22) designed to supply a power supply, notably to an electronic trip device of an electrical circuit breaker,
    characterized in that the current sensor (12) is located inside the magnetic circuit (20) of the supply transformer (14) with a coaxial arrangement around the orifice (13), and that the first secondary winding (18) is located nearer to the primary conductor (15) than the second secondary winding (22), which is located in a low magnetic field zone.
  2. The measuring assembly according to claim 1, characterized in that the magnetic circuit (20) is arranged as a closed frame having a straight branch supporting the second secondary winding (22), which extends orthogonally to the orifice (13) for passage of the primary conductor (15).
  3. The measuring assembly according to claim 2, characterized in that the magnetic circuit (20) comprises, opposite from the straight branch, a part in the shape of an arch, whose intemal wall is close to the current sensor (12).
  4. The measuring assembly according to claim 3, characterized in that the arched part of the magnetic circuit (20) has a semicircular shape centred on the axis of the orifice (13), and that the width of the toroid (16) along said axis corresponds appreciably to the size of the second secondary winding (22) measured along said axis.
  5. The measuring assembly according to one of the claims 1 to 4, characterized in that protection of the assembly is provided by an insulating enclosure formed by assembly of two half-shells (24, 26) coming into abutment in the mid-plane of symmetry.
  6. The measuring assembly according to one of the claims 1 to 5, characterized in that the magnetic circuit (20) of the supply transformer (14) comprises a pair of stacks of magnetic sheets, assembled symmetrically with respect to the mid-plane of symmetry.
EP93420101A 1992-03-19 1993-03-05 Measuring combination with current sensor and power supply transformer Expired - Lifetime EP0561717B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9203435A FR2688931B1 (en) 1992-03-19 1992-03-19 MEASURING HANDSET WITH CURRENT SENSOR AND POWER TRANSFORMER.
FR9203435 1992-03-19

Publications (2)

Publication Number Publication Date
EP0561717A1 EP0561717A1 (en) 1993-09-22
EP0561717B1 true EP0561717B1 (en) 1996-09-04

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EP93420101A Expired - Lifetime EP0561717B1 (en) 1992-03-19 1993-03-05 Measuring combination with current sensor and power supply transformer

Country Status (5)

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US (1) US5382896A (en)
EP (1) EP0561717B1 (en)
JP (1) JP3249228B2 (en)
DE (1) DE69304377T2 (en)
FR (1) FR2688931B1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6018239A (en) * 1996-10-23 2000-01-25 General Electric Company Self-powered axial current sensor
DE19706019A1 (en) * 1997-02-07 1998-08-13 Siemens Ag Low-voltage circuit breakers with optionally installable measuring transducers
US6608741B1 (en) * 2000-03-04 2003-08-19 Pass & Seymour, Inc. Two winding resonating arc fault sensor which boosts arc fault signals while rejecting arc mimicking noise
ITBG20030062A1 (en) * 2003-12-30 2005-06-30 Abb Service Srl POWER SUPPLY FOR AN ELECTRONIC PROTECTION DEVICE TO BE USED IN A LOW VOLTAGE SWITCH.
FR2870350B1 (en) * 2004-05-13 2006-07-14 Schneider Electric Ind Sas DEVICE FOR MEASURING AN ELECTRICAL CURRENT, CURRENT SENSOR, ELECTRICAL SENSOR AND CUTTING DEVICE COMPRISING SUCH A MEASURING DEVICE
CN102136358B (en) * 2011-01-13 2012-12-19 上海诺雅克电气有限公司 Power supply current transformer for electronic protection
JP6492693B2 (en) * 2015-01-27 2019-04-03 富士電機機器制御株式会社 Current sensor unit
DE102016123953A1 (en) * 2016-12-09 2018-06-14 Eaton Industries (Austria) Gmbh switch cabinet

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR427948A (en) * 1910-04-01 1911-08-17 Edward Barnwell Howland Closure clip for corsets and other similar items
FR734768A (en) * 1931-03-04 1932-10-28 Delle Atel Const Electr Improvements to air current transformers for high voltages
DE1638625A1 (en) * 1967-12-15 1971-09-30 Siemens Ag Power converter
DE2363931C3 (en) * 1973-12-20 1979-08-02 Siemens Ag, 1000 Berlin Und 8000 Muenchen Current measuring device
US4059798A (en) * 1976-03-08 1977-11-22 F. W. Bell, Inc. Method and apparatus for measuring the current flowing in a workpiece
DE2711193A1 (en) * 1977-03-15 1978-09-21 Ritz Messwandler Kg Current transformer system with inner core - has second core winding connected in parallel with winding of main core to reduce overcurrent factor
US4140961A (en) * 1977-06-21 1979-02-20 Mitsubishi Denki Kabushiki Kaisha Shunt circuit for an insulation type current transformer to adapt to a wide-band of frequency
US4262209A (en) * 1979-02-26 1981-04-14 Berner Charles A Supplemental electrical power generating system
US4540939A (en) * 1982-04-16 1985-09-10 Lucas Industries Public Limited Company Apparatus for monitoring current levels in an a.c. transmission line
FR2599195B1 (en) * 1986-05-26 1992-10-30 Merlin Gerin CURRENT SENSOR FOR A STATIC TRIGGER

Also Published As

Publication number Publication date
JPH0689823A (en) 1994-03-29
DE69304377T2 (en) 1997-02-20
DE69304377D1 (en) 1996-10-10
EP0561717A1 (en) 1993-09-22
FR2688931B1 (en) 1995-07-07
JP3249228B2 (en) 2002-01-21
US5382896A (en) 1995-01-17
FR2688931A1 (en) 1993-09-24

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