GB2350501A - Method and apparatus for monitoring ac circuits - Google Patents

Method and apparatus for monitoring ac circuits

Info

Publication number
GB2350501A
GB2350501A GB0022442A GB0022442A GB2350501A GB 2350501 A GB2350501 A GB 2350501A GB 0022442 A GB0022442 A GB 0022442A GB 0022442 A GB0022442 A GB 0022442A GB 2350501 A GB2350501 A GB 2350501A
Authority
GB
United Kingdom
Prior art keywords
voltage
divider
monitoring
capacitor
circuits
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.)
Granted
Application number
GB0022442A
Other versions
GB2350501B (en
GB0022442D0 (en
Inventor
David Birtwhistle
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.)
University of Queensland UQ
Queensland University of Technology QUT
Original Assignee
University of Queensland UQ
Queensland University of Technology QUT
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 University of Queensland UQ, Queensland University of Technology QUT filed Critical University of Queensland UQ
Publication of GB0022442D0 publication Critical patent/GB0022442D0/en
Publication of GB2350501A publication Critical patent/GB2350501A/en
Application granted granted Critical
Publication of GB2350501B publication Critical patent/GB2350501B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
    • G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
    • G01R31/3272—Apparatus, systems or circuits therefor
    • 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
    • G01R15/16—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using capacitive 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
    • G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
    • G01R15/183—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers using transformers with a magnetic core

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Gas-Insulated Switchgears (AREA)

Abstract

There is provided a method and apparatus for monitoring AC circuits, particularly for monitoring the condition of high voltage circuit breakers. High voltages are measured by connecting an external capacitor (17) between the secondary winding (13) of a current transformer (11) and ground (16), across the removable link (20). This connection, with the link (20) removed, produces a capacitor voltage divider (10) in which the high voltage element of the divider is the stray capacitance (14). The low voltage element of the divider is the external capacitor (17). The voltage on the load and supply side of a circuit breaker is measured using capacitor voltage dividers (10) and the voltage signals are fed to separate inputs on a multi-channel wave-form recording device.
GB0022442A 1998-02-19 1999-02-19 Method and apparatus for monitoring ac circuits Expired - Fee Related GB2350501B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPP1922A AUPP192298A0 (en) 1998-02-19 1998-02-19 Methods and apparatus for monitoring ac circuits
PCT/AU1999/000096 WO1999042845A1 (en) 1998-02-19 1999-02-19 Method and apparatus for monitoring ac circuits

Publications (3)

Publication Number Publication Date
GB0022442D0 GB0022442D0 (en) 2000-11-01
GB2350501A true GB2350501A (en) 2000-11-29
GB2350501B GB2350501B (en) 2002-10-30

Family

ID=3806191

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0022442A Expired - Fee Related GB2350501B (en) 1998-02-19 1999-02-19 Method and apparatus for monitoring ac circuits

Country Status (3)

Country Link
AU (1) AUPP192298A0 (en)
GB (1) GB2350501B (en)
WO (1) WO1999042845A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1557683A2 (en) * 2004-01-23 2005-07-27 General Electric Company Methods and apparatus for analyzing high voltage circuit breakers
CN103424591A (en) * 2012-05-15 2013-12-04 苏州工业园区新宏博通讯科技有限公司 Current sampling circuit for automatic reclosing lock

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6529013B2 (en) 2001-05-31 2003-03-04 Mcgraw-Edison Company Three-phase voltage sensor with active crosstalk cancellation
US6717395B2 (en) * 2001-05-31 2004-04-06 Mcgraw-Edison Company Current transformer based high voltage measurement apparatus
US9455564B2 (en) 2014-02-21 2016-09-27 General Electric Company Current and voltage module and methods of monitoring current and voltage in power distribution systems
CA2976299C (en) 2015-02-25 2023-09-26 General Electric Technology Gmbh Improvements in or relating to digital output circuits
US11137421B1 (en) * 2020-04-10 2021-10-05 Schneider Electric USA, Inc. Non-contact voltage sensing system
CN112083303A (en) * 2020-07-30 2020-12-15 中国电力科学研究院有限公司 Device and method for measuring discharge current of capacitor element during breakdown
EP4312032A1 (en) * 2022-07-27 2024-01-31 Hochschule für Angewandte Wissenschaft und Kunst Hildesheim/Holzminden/Göttingen Measuring device for alternating currents and high voltages of physical plasmas

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4689752A (en) * 1983-04-13 1987-08-25 Niagara Mohawk Power Corporation System and apparatus for monitoring and control of a bulk electric power delivery system
US4794327A (en) * 1983-04-13 1988-12-27 Fernandes Roosevelt A Electrical parameter sensing module for mounting on and removal from an energized high voltage power conductor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4689752A (en) * 1983-04-13 1987-08-25 Niagara Mohawk Power Corporation System and apparatus for monitoring and control of a bulk electric power delivery system
US4794327A (en) * 1983-04-13 1988-12-27 Fernandes Roosevelt A Electrical parameter sensing module for mounting on and removal from an energized high voltage power conductor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1557683A2 (en) * 2004-01-23 2005-07-27 General Electric Company Methods and apparatus for analyzing high voltage circuit breakers
EP1557683A3 (en) * 2004-01-23 2006-05-17 General Electric Company Methods and apparatus for analyzing high voltage circuit breakers
CN103424591A (en) * 2012-05-15 2013-12-04 苏州工业园区新宏博通讯科技有限公司 Current sampling circuit for automatic reclosing lock

Also Published As

Publication number Publication date
GB2350501B (en) 2002-10-30
GB0022442D0 (en) 2000-11-01
AUPP192298A0 (en) 1998-03-12
WO1999042845A1 (en) 1999-08-26

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20050219