WO2009139521A1 - Capteur de courant de type élément de serrage avec bobine de rogowski - Google Patents

Capteur de courant de type élément de serrage avec bobine de rogowski Download PDF

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Publication number
WO2009139521A1
WO2009139521A1 PCT/KR2008/004294 KR2008004294W WO2009139521A1 WO 2009139521 A1 WO2009139521 A1 WO 2009139521A1 KR 2008004294 W KR2008004294 W KR 2008004294W WO 2009139521 A1 WO2009139521 A1 WO 2009139521A1
Authority
WO
WIPO (PCT)
Prior art keywords
rogowski coil
current sensor
coil
housing
clamp type
Prior art date
Application number
PCT/KR2008/004294
Other languages
English (en)
Inventor
Won-Jang Cho
Original Assignee
Taehwatrans Co., Ltd.
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 Taehwatrans Co., Ltd. filed Critical Taehwatrans Co., Ltd.
Publication of WO2009139521A1 publication Critical patent/WO2009139521A1/fr

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
    • 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
    • G01R1/02—General constructional details
    • G01R1/04—Housings; Supporting members; Arrangements of terminals
    • 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
    • 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
    • G01R15/186—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers using current transformers with a core consisting of two or more parts, e.g. clamp-on type
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only

Definitions

  • the present invention relates to a current sensor with a Rogowski coil.
  • a current transformer (CT) using a magnetic coil has been used as a means for measuring load current and fault current. Due to many problems in miniaturization of such a current transformer, a current sensor using a
  • a magnetic core is not used, but a plastic bobbin of a special material, which forms an air core, is used. If current flows through a conductor that penetrates an air core, voltage in proportion to current flowing through the conductor is induced in a coil wound on the air core, and thus the coil has a structure that detects the current flowing through the conductor based on the above-described voltage induction.
  • the Rogowski coil Since the Rogowski coil has the characteristic that it does not have overcurrent damage according to saturation of iron core, it has been effectively applied to devices in which high-voltage current flows, such as an air circuit breaker, a gas insulated load break switch, and the like.
  • FIG. 1 is an exploded perspective view of a conventional current sensor 100 having a Rogowski coil.
  • the conventional current sensor 100 having a Rogowski coil includes a Rogowski coil 110 formed by winding a coil 113 on a ring-shaped air core 111 that can be penetrated by a conductor (not illustrated) through which current to be measured flows; a housing 120 formed in a ring shape so that the conductor, through which the current to be measured flows, can penetrate the housing, and accommodating the Rogowski coil 110 except for a connection end part of the coil 113, and an epoxy molding 130 for sealing the Rogowski coil 110 accommodated in the housing 120.
  • the conventional current sensor 100 having the Rogowski coil is formed in a ring shape that cannot be opened/closed on the whole, it is not easy to install/remove the current sensor on/from the conductor through which the current to be measured is flowing.
  • the Rogowski coil 110 is formed in a form that the coil 113 is simply wound on the air core 111 , noise due to capacitance between the air core 110 and the coil 11 or noise due to capacitance between the coil 113 and the coil is generated, and the coil 113 is affected by an external magnetic field.
  • An object of the present invention is to provide a clamp type current sensor with a Rogowski coil, which can be easily installed on or removed from a conductor through which current to be measured flows.
  • Another object of the present invention is to provide a clamp type current sensor with a Rogowski coil, which can perform a more precise current monitoring by minimizing a noise due to capacitance between an air core and a coil, a noise due to capacitance between coils, and an influence of an external magnetic field on the coils.
  • a clamp type current sensor with a Rogowski coil installed round a conductor, through which current to be measured flows, for detecting the current flowing through the conductor, according to the present invention, which includes a Rogowski coil formed by winding a coil on a flexible air-core; an open/close type housing having first and second semicircular housing members for accommodating the Rogowski coil therein, a hinge part, connected to one end of the first and second housing members, for opening/closing the housing, an engagement part formed on the other end of the first and second housing members to keep the first and second housing members in a ring shape; and shielding covers engaged with upper open ends of the first and second housing members.
  • the Rogowski coil may be formed in a manner that both end parts of the coil are positioned in parallel through penetration into the flexible air-core, and are connected to a neutral terminal, and an outer periphery of the Rogowski coil is shielded by a shielding cable.
  • the Rogowski coil shielded by the shielding cable may be inserted into a protective tube.
  • the clamp type current sensor according to the present invention may further include a connector formed to project to one side of the first or second housing member, and connected to a coil end part of the Rogowski coil.
  • the clamp type current sensor according to the present invention may further include cushion members, engaged with inner peripheries of the first and second housing members that form a ring through the engagement part, for making the current sensor stably installed on the conductor.
  • the current sensor can be easily installed on or removed from a conductor through which current to be measured flows. Also, in manufacturing the Rogowski coil, both end parts of the coil are positioned in parallel through penetration into the air-core, and are connected to a neutral terminal, and an outer periphery of the Rogowski coil is shielded by a shielding cable. Accordingly, a more precise current monitoring can be performed through minimization of a noise due to capacitance between the flexible air-core and the coil, a noise due to capacitance between the coils, and an influence of an external magnetic field on the coils.
  • FIG. 1 is an exploded perspective view of a conventional current sensor with a Rogowski coil
  • FIG. 2 is a perspective view of a clamp type current sensor with a Rogowski coil according to an embodiment of the present invention
  • FIG. 3 is an exploded perspective view of a clamp type current sensor with a Rogowski coil according to an embodiment of the present invention
  • FIG. 4 is a sectional view of a Rogowski coil in a clamp type current sensor according to an embodiment of the present invention
  • FIGS. 5A to 51 are views explaining a process of manufacturing a clamp type current sensor with a Rogowski coil according to an embodiment of the present invention.
  • FIG. 2 is a perspective view of a clamp type current sensor with a Rogowski coil according to an embodiment of the present invention
  • FIG. 3 is an exploded perspective view of a clamp type current sensor with a Rogowski coil according to an embodiment of the present invention
  • FIG. 4 is a sectional view of a Rogowski coil in a clamp type current sensor according to an embodiment of the present invention
  • FIGS. 5A to 51 are views explaining a process of manufacturing a clamp type current sensor with a Rogowski coil according to an embodiment of the present invention.
  • the clamp type current sensor 1 with a Rogowski coil can be easily installed on or removed from a conductor (not illustrated) through which current to be measured flows, and can perform a more precise current monitoring through minimization of a noise due to capacitance between a flexible air-core 11 and a coil 13, a noise due to capacitance between the coils 13, and an influence of an external magnetic field on the coils 13. As illustrated in FIGS.
  • the clamp type current sensor 1 includes a Rogowski coil 10 formed by winding a coil 13 on a flexible air-core 11 ; an open/close type housing 20 having first and second semicircular housing members 21 and 23 for accommodating the Rogowski coil 10 therein, a hinge part 25, connected to one end of the first and second housing members 21 and 23, for opening/closing the housing 20, an engagement part 27 formed on the other end of the first and second housing members 21 and 23 to keep the first and second housing members 21 and 23 in a ring shape; and shielding covers 30 engaged with upper open ends of the first and second housing members 21 and 23.
  • the Rogowski coil 10 measures current flowing through the conductor
  • the flexible air-core 11 is adopted as a core of the Rogowski coil 10, and is made of a flexible material so that it is in a flexible state in accordance with the opening/closing of the open/close type housing 20 to be described later. Since the flexible air-core 11 is not made of a metallic material, but is made of synthetic resin or rubber in the form of a tube, it has no saturation phenomenon of iron core, and thus high-current measurement becomes possible.
  • both end parts of the coil 13 are positioned in parallel through penetration into the flexible air-core 11 , and are connected to a neutral terminal (not illustrated) after the coil 13 is wound, and an outer periphery of the Rogowski coil is shielded by a shielding cable 15 for removing the influence of an external magnetic field. Accordingly, noises due to capacitance between the flexible air-core 11 and the coil 13 and capacitance between the coils 13 are removed, and the influence of the external magnetic field on the coil 13 is minimized.
  • the Rogowski coil 10 shielded by the shielding cable 15 is inserted into a protective tube 17.
  • This protective tube 17 is kept shielded by the shielding cable 15, and serves to prevent the damage of the Rogowski coil 10, and particularly, the damage of the shielding cable 15.
  • the Rogowski coil 10 is accommodated in the open/close type housing 20, and is installed round the conductor through which the current to be measured flows.
  • the open/close type housing 20 forms a protective case for protecting the Rogowski coil 10, and facilitates installation/removal of the clamp type current sensor 1 with a Rogowski coil on/from the conductor as well.
  • One end of the first housing member 21 and one end of the second housing member 23 are engaged with each other by the hinge part 25 to open/close the housing 20 when the current sensor 1 is installed on or removed from the conductor.
  • one end of the first housing member 21 and the second housing member 23, which are hinge-engaged with each other by the hinge part 25, is open, and the other end thereof, at which both end parts of the Rogowski coil 10 are positioned, is closed to form a case.
  • the open/close type housing is injection-molded using synthetic resin such as epoxy resin.
  • the engagement part 27 is formed to keep the open/close type housing 20 in a ring shape when the current sensor is installed on the conductor.
  • the engagement part 27 may be formed by first and second screw holes 27a and 27b formed on the other side of the first and second housing members 21 and 23 and a fastening screw fastening through the screw holes 27a and 27b, or may be formed by a snap engagement piece or a pressing engagement piece detachably formed on the other side of the first and second housing members 21 and 23.
  • Shielding covers 30 are engaged with the upper open ends of the first and second housing members.
  • the shielding covers 30 serve to shield the Rogowski coil 10 from an external magnetic field by closing the upper open end of the open/close type housing 20 in which the Rogowski coil 10 is built. It is preferable that the shielding covers 30 are injection-molded using synthetic resin such as epoxy resin, and are engaged in a body with the upper open ends of the first and second housing members 21 and 23.
  • a connector 40 is formed to project.
  • the connector 40 serves to output a current signal measured by the Rogowski coil 10, and is connected to both end parts of the coil 13 wound on the flexible air-core 11.
  • the connector 40 is an N-shaped coaxial cable connector.
  • cushion members 50 are engaged with the inner peripheries of the first and second housing members 21 and 23 that form a ring through the engagement part 27. Inner peripheries of the cushion members 50 are in contact with the conductor through which current to be measured flows, and thus the cushion members 50 serve to stably install the clamp type current sensor 1 with a Rogowski coil according to the present invention round the conductor and to absorb an impact that may be transferred between the clamp type current sensor 1 with a Rogowski coil according to the present invention and the conductor due to an external force as well. It is preferable that the cushion members 50 are made of rubber, silicon, or urethane, and are adhered or fused to the inner peripheries of the first and second housing members 21 and 23.
  • the coil 13 is wound on the flexible air-core 11 having a specified length, and both end parts of the coil 13 are positioned in parallel through penetration into the flexible air-core 11. Then, as shown in FIG. 5B, the outer periphery of the coil 13 is shielded by the shielding cable 15, and then inserted into the protective tube 17, as shown in
  • FIG. 5C to complete the manufacturing of the Rogowski coil 10.
  • the Rogowski coil 10 is built in the open/close type housing 20 one side of which is open, the connector 40 is connected as shown in FIG. 5E, and then the shielding covers 30 are engaged in a body with the upper open ends of the first and second housing members 21 and 23 a shown in FIGS. 5F and 5G.
  • the open/close type housing 20, on side of which is open is put on the conductor (not illustrated), through which the current to be measured flows, and then is fixed to the conductor in the form of a ring through engagement of the engagement part 17 as shown in FIG. 5H.
  • the cushion members 50 are engaged with the inner peripheries of the first and second housing members 21 and 23 so as to stably install the clamp type current sensor 1 with a Rogowski coil according to the present invention round the conductor.
  • the flexible Rogowski coil 10 is built in the ring-shaped open/close type housing 20, and thus the current sensor 1 can be easily installed on or removed from the conductor through which the current to be measured flows.
  • both end parts of the coil 13 are positioned in parallel through penetration into the flexible air-core 11 , and are connected to a neutral terminal, and the outer periphery of the Rogowski coil 10 is shielded by the shielding cable 17, a more precise current monitoring can be performed through minimization of a noise due to capacitance between the flexible air-core 11 and the coil 13, a noise due to capacitance between the coils 13, and an influence of an external magnetic field on the coils 13.

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

Abstract

L'invention porte sur un capteur de courant de type élément de serrage avec une bobine de Rogowski, qui comprend une bobine de Rogowski formée par enroulement d'une bobine sur un noyau d'air flexible ; un boîtier de type ouvert/fermé ayant des premier et second éléments de boîtier semi-circulaires pour recevoir la bobine de Rogowski dans celui-ci, une partie articulée, reliée à une extrémité des premier et second éléments de boîtier, pour ouvrir/fermer le boîtier, une partie de mise en prise étant formée sur l'autre extrémité des premier et second éléments de boîtier pour maintenir les premier et second éléments de boîtier sous une forme d'anneau, et des couvercles de protection venant en prise avec les extrémités ouvertes supérieures des premier et second éléments de boîtier.
PCT/KR2008/004294 2008-05-13 2008-07-23 Capteur de courant de type élément de serrage avec bobine de rogowski WO2009139521A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020080044003A KR100965818B1 (ko) 2008-05-13 2008-05-13 로고스키코일을 구비하는 분할클램프식 전류센서
KR10-2008-0044003 2008-05-13

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WO2009139521A1 true WO2009139521A1 (fr) 2009-11-19

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US9081040B2 (en) 2011-09-09 2015-07-14 General Electric Company Sensor devices and methods for use in sensing current through a conductor
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US9429595B2 (en) 2011-09-09 2016-08-30 Aclara Meters Llc Sensor devices and methods for use in sensing current through a conductor
US9664711B2 (en) 2009-07-31 2017-05-30 Pulse Electronics, Inc. Current sensing devices and methods
US9671434B2 (en) 2014-08-08 2017-06-06 Aclara Meters Llc Sensor devices and methods for use in sensing current through a conductor
US9739804B2 (en) 2013-05-24 2017-08-22 3M Innovative Properties Company Closure for measuring voltage on power-carrying conductors
US9823274B2 (en) 2009-07-31 2017-11-21 Pulse Electronics, Inc. Current sensing inductive devices
US20170363661A1 (en) * 2016-06-21 2017-12-21 3M Innovative Properties Company Holder with self-aligning feature for holding current sensor around line conductor
US10215778B2 (en) 2013-12-18 2019-02-26 3M Innovative Properties Company Voltage Sensor
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JP2022094190A (ja) * 2020-12-14 2022-06-24 横河電機株式会社 分割型センサヘッド及び分割型電流センサ
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WO2024044379A1 (fr) * 2022-08-25 2024-02-29 Ubicquia, Inc. Appareil pour positionner et retenir un dispositif en forme de câble autour d'un objet

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KR101462204B1 (ko) * 2013-09-13 2014-11-20 오찬배 전력 부하 측정용 프로브
KR102050711B1 (ko) * 2013-09-30 2019-12-03 한국전력공사 지중송전선로의 선로정수 분석장치 및 분석방법
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CN105301331B (zh) * 2015-11-24 2018-06-19 山东航天电子技术研究所 一种霍尔传感器骨架
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KR101885433B1 (ko) * 2016-10-20 2018-08-03 송홍준 전력선의 누설전류를 이용한 씽크 홀 감지장치
KR101889611B1 (ko) * 2016-10-20 2018-09-20 송홍준 전력선의 누설전류를 이용한 지진감지장치
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KR102114601B1 (ko) * 2020-02-07 2020-06-17 이형준 고전력 케이블의 부분방전 측정용 이중 토로이드 고주파 씨티 센서 장치
KR102121046B1 (ko) * 2020-02-26 2020-06-17 주식회사 프로텍타코리아 복합 송전선로 고장 검출장치
KR102292232B1 (ko) * 2021-02-01 2021-08-23 주식회사 비파워 일체형 pcb 형상의 로고스키형 전류 감지 장치
KR102496537B1 (ko) * 2022-07-29 2023-02-06 주식회사 아이티스퀘어 감지율이 향상된 pcb 로고스키 코일 전류 감지 장치 및 시스템

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Cited By (41)

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Publication number Priority date Publication date Assignee Title
US9823274B2 (en) 2009-07-31 2017-11-21 Pulse Electronics, Inc. Current sensing inductive devices
US9664711B2 (en) 2009-07-31 2017-05-30 Pulse Electronics, Inc. Current sensing devices and methods
CN101916674A (zh) * 2010-08-12 2010-12-15 温县供电有限责任公司 超级绝缘操作杆
WO2012045287A1 (fr) 2010-10-04 2012-04-12 Abb Technology Ag Dispositif de mesure multifonction
US9297829B2 (en) 2010-10-04 2016-03-29 Abb Technology Ag Multifunctional measuring device
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