DE69312264T2 - Kopplerschaltung für ein Messinstrument - Google Patents

Kopplerschaltung für ein Messinstrument

Info

Publication number
DE69312264T2
DE69312264T2 DE69312264T DE69312264T DE69312264T2 DE 69312264 T2 DE69312264 T2 DE 69312264T2 DE 69312264 T DE69312264 T DE 69312264T DE 69312264 T DE69312264 T DE 69312264T DE 69312264 T2 DE69312264 T2 DE 69312264T2
Authority
DE
Germany
Prior art keywords
circuit
varistor
thermistor
current source
current
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 - Fee Related
Application number
DE69312264T
Other languages
German (de)
English (en)
Other versions
DE69312264D1 (de
Inventor
Glade B Bacon
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.)
Fluke Corp
Original Assignee
Fluke 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 Fluke Corp filed Critical Fluke Corp
Publication of DE69312264D1 publication Critical patent/DE69312264D1/de
Application granted granted Critical
Publication of DE69312264T2 publication Critical patent/DE69312264T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
    • H02H9/026—Current limitation using PTC resistors, i.e. resistors with a large positive temperature coefficient
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
    • H02H9/025—Current limitation using field effect transistors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • H02H9/042—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage comprising means to limit the absorbed power or indicate damaged over-voltage protection device

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
  • Amplifiers (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
DE69312264T 1993-05-03 1993-12-29 Kopplerschaltung für ein Messinstrument Expired - Fee Related DE69312264T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/057,521 US5418450A (en) 1993-05-03 1993-05-03 Coupling circuit for a measuring instrument

Publications (2)

Publication Number Publication Date
DE69312264D1 DE69312264D1 (de) 1997-08-21
DE69312264T2 true DE69312264T2 (de) 1997-11-06

Family

ID=22011089

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69312264T Expired - Fee Related DE69312264T2 (de) 1993-05-03 1993-12-29 Kopplerschaltung für ein Messinstrument

Country Status (6)

Country Link
US (1) US5418450A (enExample)
EP (1) EP0623984B1 (enExample)
JP (1) JP2589270B2 (enExample)
KR (1) KR100300842B1 (enExample)
DE (1) DE69312264T2 (enExample)
TW (1) TW258790B (enExample)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5909660A (en) * 1994-10-13 1999-06-01 National Instruments Corporation Signal conditioning module for sensing multiform field voltage signals
US6031368A (en) * 1996-09-12 2000-02-29 S&C Electric Company Sensing apparatus for cable termination devices in power distribution systems
DE19725870A1 (de) * 1997-06-18 1999-01-07 Siemens Ag Begrenzerschaltung für Wechselströme
US6356027B1 (en) * 1999-05-07 2002-03-12 Philips Electronics North America Corporation 0-10V dimming interface protection circuit
US6278596B1 (en) * 1999-06-17 2001-08-21 Tektronix, Inc. Active ground fault disconnect
US7255476B2 (en) * 2004-04-14 2007-08-14 International Business Machines Corporation On chip temperature measuring and monitoring circuit and method
JP4543973B2 (ja) * 2005-03-08 2010-09-15 富士電機機器制御株式会社 ＡＳ−ｉ用スレーブの過負荷・短絡保護回路
US7854549B2 (en) * 2007-06-29 2010-12-21 Fluke Corporation Systems and methods for dissipating heat generated during an electrical measurement
US7990162B2 (en) * 2007-08-14 2011-08-02 Fluke Corporation Systems and methods for an open circuit current limiter
KR100792765B1 (ko) 2007-09-28 2008-01-11 주식회사 뉴인스 루프전류 동작 온습도 계측기
TWM382449U (en) * 2010-01-08 2010-06-11 Ying-Chia Chen Package of constant-current chip and light-emitting diode lamp drived by alternating current
CN103713197A (zh) * 2012-09-29 2014-04-09 丹纳赫（上海）工业仪器技术研发有限公司 电池测试仪
US11359898B2 (en) * 2018-03-19 2022-06-14 Geodynamics, Inc. Current feed-through wireline release tool and method
CN110596449B (zh) * 2019-09-05 2021-09-10 深圳市依崇微电子科技有限公司 基于原边反馈反激式变换器的膝点电压采样系统及其方法
CN114325043B (zh) * 2021-12-16 2023-10-17 华人运通(江苏)技术有限公司 一种提高小电流测试精度的系统及测试方法

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3369129A (en) * 1966-03-29 1968-02-13 Ibm Current limiter employing field effect devices
US3488573A (en) * 1967-02-27 1970-01-06 Weston Instruments Inc Overload protection for thermally sensitive load device
US3611242A (en) * 1969-11-07 1971-10-05 Texas Instruments Inc Overload protection apparatus
JPS5421535B2 (enExample) * 1971-10-09 1979-07-31
JPS545599B2 (enExample) * 1972-05-08 1979-03-19
US3976854A (en) * 1974-07-31 1976-08-24 Matsushita Electric Industrial Co., Ltd. Constant-temperature heater
US4200898A (en) * 1978-06-19 1980-04-29 The United States Of America As Represented By The Secretary Of The Navy Current limiter
JPS57191563A (en) * 1981-05-21 1982-11-25 Shiojiri Kogyo Kk Digital clamping meter
US4533970A (en) * 1983-06-27 1985-08-06 Motorola, Inc. Series current limiter
US4467310A (en) * 1983-10-03 1984-08-21 Northern Telecom Limited Telephone subscriber line battery feed resistor arrangements
US4990987A (en) * 1986-12-18 1991-02-05 Gte Products Corporation Over-temperature sensor and protector for semiconductor devices
EP0353166A3 (en) * 1988-07-25 1991-04-10 John Fluke Mfg. Co., Inc. Overvoltage protection circuit
DE4022253A1 (de) * 1990-07-11 1992-01-16 Krone Ag Strombegrenzungsschaltung
US5146150A (en) * 1990-08-06 1992-09-08 Motorola, Inc. Safe battery cell interconnects
US5196980A (en) * 1991-01-28 1993-03-23 John Fluke Mfg. Co., Inc. Low impedance, high voltage protection circuit

Also Published As

Publication number Publication date
EP0623984B1 (en) 1997-07-16
TW258790B (enExample) 1995-10-01
JPH07234251A (ja) 1995-09-05
JP2589270B2 (ja) 1997-03-12
US5418450A (en) 1995-05-23
DE69312264D1 (de) 1997-08-21
KR100300842B1 (ko) 2001-10-22
EP0623984A1 (en) 1994-11-09

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee