CN110470867B - 具有非接触式电压测量的可调节长度罗戈夫斯基线圈测量设备 - Google Patents

具有非接触式电压测量的可调节长度罗戈夫斯基线圈测量设备 Download PDF

Info

Publication number
CN110470867B
CN110470867B CN201910384074.2A CN201910384074A CN110470867B CN 110470867 B CN110470867 B CN 110470867B CN 201910384074 A CN201910384074 A CN 201910384074A CN 110470867 B CN110470867 B CN 110470867B
Authority
CN
China
Prior art keywords
rogowski coil
channel
sensor
electrical parameter
insulated 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.)
Active
Application number
CN201910384074.2A
Other languages
English (en)
Chinese (zh)
Other versions
CN110470867A (zh
Inventor
J.沃罗内斯
R.施托伊尔
R.罗德里格斯
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.)
FRANK CORP
Original Assignee
FRANK 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 FRANK CORP filed Critical FRANK CORP
Publication of CN110470867A publication Critical patent/CN110470867A/zh
Application granted granted Critical
Publication of CN110470867B publication Critical patent/CN110470867B/zh
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
    • G01R19/2503—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques for measuring voltage only, e.g. digital volt meters (DVM's)
    • 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
    • G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
    • G01R1/0425—Test clips, e.g. for IC's
    • 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
    • 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
    • G01R15/20—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
    • 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
    • G01R15/205—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 magneto-resistance devices, e.g. field plates
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
    • G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2804—Printed windings
    • 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
    • G01R15/12—Circuits for multi-testers, i.e. multimeters, e.g. for measuring voltage, current, or impedance at will
    • G01R15/125—Circuits for multi-testers, i.e. multimeters, e.g. for measuring voltage, current, or impedance at will for digital multimeters
    • 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
    • G01R21/00—Arrangements for measuring electric power or power factor
    • G01R21/06—Arrangements for measuring electric power or power factor by measuring current and voltage

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
  • Measuring Leads Or Probes (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
CN201910384074.2A 2018-05-09 2019-05-09 具有非接触式电压测量的可调节长度罗戈夫斯基线圈测量设备 Active CN110470867B (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US15/975,187 US10746767B2 (en) 2018-05-09 2018-05-09 Adjustable length Rogowski coil measurement device with non-contact voltage measurement
US15/975187 2018-05-09

Publications (2)

Publication Number Publication Date
CN110470867A CN110470867A (zh) 2019-11-19
CN110470867B true CN110470867B (zh) 2024-10-29

Family

ID=66476561

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910384074.2A Active CN110470867B (zh) 2018-05-09 2019-05-09 具有非接触式电压测量的可调节长度罗戈夫斯基线圈测量设备

Country Status (5)

Country Link
US (1) US10746767B2 (enExample)
EP (1) EP3567385B1 (enExample)
JP (2) JP7311307B2 (enExample)
CN (1) CN110470867B (enExample)
TW (2) TWI820127B (enExample)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10746767B2 (en) * 2018-05-09 2020-08-18 Fluke Corporation Adjustable length Rogowski coil measurement device with non-contact voltage measurement
JP7311261B2 (ja) * 2018-11-09 2023-07-19 日置電機株式会社 フレキシブルセンサ及び測定装置
DE102019102567B3 (de) * 2019-02-01 2020-03-05 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Sensorvorrichtung zur Messung von Gleich- und Wechselströmen
USD937109S1 (en) * 2019-04-30 2021-11-30 Autel Intelligent Technology Corp., Ltd. Storage battery tester
USD928642S1 (en) * 2019-04-30 2021-08-24 Autel Intelligent Technology Corp., Ltd. Storage battery tester
US11067641B2 (en) * 2019-07-22 2021-07-20 Fluke Corporation Measurement device and operating methods thereof for power disturbance indication
JP7703332B2 (ja) * 2020-02-05 2025-07-07 フルークコーポレイション 非接触電気測定用の調節可能な内部領域を有するクランプを有するセンサプローブ
EP3862762B1 (en) 2020-02-05 2025-09-10 Fluke Corporation Non-contact voltage measurement with adjustable size rogowski coil
CN111257623A (zh) * 2020-02-28 2020-06-09 上海金智晟东电力科技有限公司 一种非接触式低压停电感知装置
JP7386743B2 (ja) * 2020-03-24 2023-11-27 日置電機株式会社 フレキシブルセンサ及び測定装置
USD947048S1 (en) * 2020-06-05 2022-03-29 Autel Intelligent Technology Corp., Ltd. Battery testing module
WO2022046959A1 (en) * 2020-08-26 2022-03-03 Georgia Tech Research Corporation Energy meters and energy monitoring systems and methods
US11733271B2 (en) * 2020-09-25 2023-08-22 Tektronix, Inc. Multi-segmented Rogowski-coil current sensor
CN117452047A (zh) * 2020-09-25 2024-01-26 特克特朗尼克公司 将分路电阻器与罗哥夫斯基线圈进行组合的电流监视器
US12442838B2 (en) 2022-07-26 2025-10-14 Tektronix, Inc. Current monitor combining a shunt resistor with a Rogowski coil
CN112462298A (zh) * 2020-10-20 2021-03-09 云南电网有限责任公司昆明供电局 一种断路器回路非接触式在线监测装置
CN117222897B (zh) * 2021-03-24 2025-04-15 国立大学法人九州工业大学 罗柯夫斯基型电流传感器、逆变器以及罗柯夫斯基型电流传感器的安装方法
DE102021121410B3 (de) * 2021-08-18 2022-12-01 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Vorrichtung und verfahren zum Messen eines Stromflusses in einem direkt gekühlten Leiter
US11693033B2 (en) * 2021-09-02 2023-07-04 Fluke Corporation Sensor probe with combined non-contact sensor and a Rogowski coil
JP2023076022A (ja) * 2021-11-22 2023-06-01 日置電機株式会社 電流センサおよび測定装置
CN114814702B (zh) * 2022-01-25 2024-05-14 武汉大学 双环骨架罗氏线圈电流传感器灵敏度的快速计算方法
CN114895087A (zh) * 2022-06-27 2022-08-12 广东电网有限责任公司 一种电能测量装置接线钳口及电能测量装置
CN116754819A (zh) * 2023-08-04 2023-09-15 东莞燊沙电子有限公司 非接触式交流感测探头及其感测方法和应用
CN119667264B (zh) * 2024-12-24 2025-11-25 中国南方电网有限责任公司超高压输电公司广州局 端子排接线试验装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105467184A (zh) * 2014-09-25 2016-04-06 弗兰克公司 无线罗戈夫斯基线圈系统

Family Cites Families (67)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01321373A (ja) * 1988-06-24 1989-12-27 Mitsubishi Electric Corp 高精度電流センサー
US5473244A (en) 1992-09-17 1995-12-05 Libove; Joel M. Apparatus for measuring voltages and currents using non-contacting sensors
JPH06222087A (ja) 1993-01-27 1994-08-12 Hamamatsu Photonics Kk 電圧検出装置
US5973501A (en) 1993-10-18 1999-10-26 Metropolitan Industries, Inc. Current and voltage probe for measuring harmonic distortion
JPH09184866A (ja) 1995-12-28 1997-07-15 Sumitomo Electric Ind Ltd ケーブルの活線下劣化診断方法
US6043640A (en) 1997-10-29 2000-03-28 Fluke Corporation Multimeter with current sensor
US6118270A (en) 1998-02-17 2000-09-12 Singer; Jerome R. Apparatus for fast measurements of current and power with scaleable wand-like sensor
IL127699A0 (en) 1998-12-23 1999-10-28 Bar Dov Aharon Method and device for non contact detection of external electric or magnetic fields
US6812685B2 (en) 2001-03-22 2004-11-02 Actuant Corporation Auto-selecting, auto-ranging contact/noncontact voltage and continuity tester
JP3761470B2 (ja) 2001-04-04 2006-03-29 北斗電子工業株式会社 非接触電圧計測方法及び装置並びに検出プローブ
US6644636B1 (en) 2001-10-26 2003-11-11 M. Terry Ryan Clamp adapter
CN2639905Y (zh) 2003-07-25 2004-09-08 深圳市纳米电子有限公司 一种钳形表校验仪
BRPI0506472A (pt) 2004-01-07 2007-02-06 Suparules Ltd dispositivo para medição de voltagem
US7256588B2 (en) 2004-04-16 2007-08-14 General Electric Company Capacitive sensor and method for non-contacting gap and dielectric medium measurement
US7230413B2 (en) * 2004-10-19 2007-06-12 Siemens Energy & Automation, Inc. Flexible current sensor
DE102004063249A1 (de) 2004-12-23 2006-07-13 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Sensorsystem und Verfahren zur kapazitiven Messung elektromagnetischer Signale biologischen Ursprungs
JP4611774B2 (ja) 2005-03-04 2011-01-12 東日本電信電話株式会社 非接触型電圧検出方法及び非接触型電圧検出装置
US7466145B2 (en) 2005-10-12 2008-12-16 Hioki Denki Kabushiki Kaisha Voltage measuring apparatus and power measuring apparatus
JP4607753B2 (ja) 2005-12-16 2011-01-05 日置電機株式会社 電圧測定装置および電力測定装置
JP4607752B2 (ja) 2005-12-16 2011-01-05 日置電機株式会社 可変容量回路、電圧測定装置および電力測定装置
JP4713358B2 (ja) 2006-02-08 2011-06-29 日置電機株式会社 電圧検出装置
JP4648228B2 (ja) 2006-03-24 2011-03-09 日置電機株式会社 電圧検出装置および初期化方法
JP5106798B2 (ja) 2006-06-22 2012-12-26 日置電機株式会社 電圧測定装置
JP4726721B2 (ja) 2006-07-03 2011-07-20 日置電機株式会社 電圧測定装置
JP4726722B2 (ja) 2006-07-03 2011-07-20 日置電機株式会社 電圧測定装置
JP4629625B2 (ja) 2006-07-12 2011-02-09 日置電機株式会社 電圧測定装置
GB0614261D0 (en) 2006-07-18 2006-08-30 Univ Sussex The Electric Potential Sensor
JP4899976B2 (ja) 2007-03-27 2012-03-21 パナソニック電工株式会社 電流センサ
JP5106909B2 (ja) 2007-04-10 2012-12-26 日置電機株式会社 線間電圧測定装置
JP4927632B2 (ja) 2007-04-13 2012-05-09 日置電機株式会社 電圧測定装置
JP5144110B2 (ja) 2007-04-13 2013-02-13 日置電機株式会社 電圧測定装置
DE602007014195D1 (de) * 2007-06-28 2011-06-09 Lem Liaisons Electron Mec Rogowski-Stromsensor
JP5069978B2 (ja) 2007-08-31 2012-11-07 株式会社ダイヘン 電流・電圧検出用プリント基板および電流・電圧検出器
FR2923019A1 (fr) 2007-10-26 2009-05-01 Schneider Electric Ind Sas Dispositif de mesure de courant flexible et ajustable
JP5160248B2 (ja) 2008-01-18 2013-03-13 日置電機株式会社 電圧検出装置
US20100090682A1 (en) 2008-02-14 2010-04-15 Armstrong Eric A Multi-Meter Test Lead Probe For Hands-Free Electrical Measurement of Control Panel Industrial Terminal Blocks
US8222886B2 (en) 2008-06-18 2012-07-17 Hioki Denki Kabushiki Kaisha Voltage detecting apparatus and line voltage detecting apparatus having a detection electrode disposed facing a detected object
JP5389389B2 (ja) 2008-07-22 2014-01-15 日置電機株式会社 線間電圧測定装置およびプログラム
CN101881791B (zh) 2009-04-30 2015-08-05 日置电机株式会社 电压检测装置
JP5340817B2 (ja) 2009-06-11 2013-11-13 日置電機株式会社 電圧検出装置
US8330449B2 (en) * 2009-07-20 2012-12-11 Fluke Corporation Clamp-on multimeters including a Rogowski coil for measuring alternating current in a conductor
US9151782B2 (en) * 2009-07-31 2015-10-06 Pulse Electronics, Inc. Current sensing devices and methods
JP5420387B2 (ja) 2009-12-09 2014-02-19 日置電機株式会社 電圧検出装置
JP5474707B2 (ja) 2010-08-30 2014-04-16 日置電機株式会社 電圧検出装置用の検出回路および電圧検出装置
US8680845B2 (en) 2011-02-09 2014-03-25 International Business Machines Corporation Non-contact current and voltage sensor
US9063184B2 (en) * 2011-02-09 2015-06-23 International Business Machines Corporation Non-contact current-sensing and voltage-sensing clamp
JP5834663B2 (ja) 2011-04-06 2015-12-24 富士通株式会社 交流電力測定装置
JP5834292B2 (ja) 2011-05-09 2015-12-16 アルプス・グリーンデバイス株式会社 電流センサ
BR112014002634B1 (pt) 2011-08-03 2021-06-15 Fluke Corporation Método de obtenção e manutenção de registro de manutenção,sistema para obtenção e manutenção de registros de manutenção e meio de armazenamento legível por computador.
US8754636B2 (en) 2011-12-07 2014-06-17 Brymen Technology Corporation Clamp meter with multipoint measurement
CN204214925U (zh) 2012-03-16 2015-03-18 菲力尔系统公司 电传感器和电传感器标签
US10095659B2 (en) * 2012-08-03 2018-10-09 Fluke Corporation Handheld devices, systems, and methods for measuring parameters
US20140035607A1 (en) 2012-08-03 2014-02-06 Fluke Corporation Handheld Devices, Systems, and Methods for Measuring Parameters
JP5981271B2 (ja) 2012-08-28 2016-08-31 日置電機株式会社 電圧測定用センサおよび電圧測定装置
JP5981270B2 (ja) 2012-08-28 2016-08-31 日置電機株式会社 電圧測定用センサおよび電圧測定装置
US9007077B2 (en) 2012-08-28 2015-04-14 International Business Machines Corporation Flexible current and voltage sensor
US9625535B2 (en) 2013-08-07 2017-04-18 Allegro Microsystems, Llc Systems and methods for computing a position of a magnetic target
WO2015058166A2 (en) * 2013-10-18 2015-04-23 Flir Systems, Inc. Measurement device for lighting installations and related methods
EP2887074B1 (en) * 2013-12-18 2020-11-25 3M Innovative Properties Company Voltage sensor
JP6210938B2 (ja) 2014-06-18 2017-10-11 日置電機株式会社 非接触型電圧検出装置
US9689903B2 (en) 2014-08-12 2017-06-27 Analog Devices, Inc. Apparatus and methods for measuring current
US10602082B2 (en) 2014-09-17 2020-03-24 Fluke Corporation Triggered operation and/or recording of test and measurement or imaging tools
TWI649568B (zh) 2014-10-17 2019-02-01 日商日置電機股份有限公司 Voltage detecting device
US10271020B2 (en) 2014-10-24 2019-04-23 Fluke Corporation Imaging system employing fixed, modular mobile, and portable infrared cameras with ability to receive, communicate, and display data and images with proximity detection
US9541581B2 (en) 2014-10-27 2017-01-10 Fluke Corporation Flexible current sensor
JP6605237B2 (ja) 2015-06-17 2019-11-13 日置電機株式会社 電流測定装置
US10746767B2 (en) * 2018-05-09 2020-08-18 Fluke Corporation Adjustable length Rogowski coil measurement device with non-contact voltage measurement

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105467184A (zh) * 2014-09-25 2016-04-06 弗兰克公司 无线罗戈夫斯基线圈系统

Also Published As

Publication number Publication date
TWI820127B (zh) 2023-11-01
JP7311307B2 (ja) 2023-07-19
TW201947232A (zh) 2019-12-16
US10746767B2 (en) 2020-08-18
EP3567385B1 (en) 2023-07-05
JP2019215330A (ja) 2019-12-19
EP3567385A1 (en) 2019-11-13
CN110470867A (zh) 2019-11-19
US20190346492A1 (en) 2019-11-14
TWI860108B (zh) 2024-10-21
TW202417859A (zh) 2024-05-01
JP7657858B2 (ja) 2025-04-07
JP2023126924A (ja) 2023-09-12

Similar Documents

Publication Publication Date Title
CN110470867B (zh) 具有非接触式电压测量的可调节长度罗戈夫斯基线圈测量设备
CN110470868B (zh) 用于非接触式电参数测量的夹钳探头
JP7219669B2 (ja) 非接触電気的パラメータ測定用可撓性ジョープローブ
US12061213B2 (en) Non-contact voltage measurement with adjustable size rogowski coil
EP4145141B1 (en) Sensor probe with combined non-contact sensor and a rogowski coil
US11513140B2 (en) Sensor probe with clamp having adjustable interior region for non-contact electrical measurement
CN115754414B (en) Sensor probe with combined non-contact sensor and Rogowski coil

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant