FR2412079A1 - Electrical power distribution network fault detector - has FET switches with low-pass filter providing blocking signals for isolating circuit at multivibrator output - Google Patents

Electrical power distribution network fault detector - has FET switches with low-pass filter providing blocking signals for isolating circuit at multivibrator output

Info

Publication number
FR2412079A1
FR2412079A1 FR7737509A FR7737509A FR2412079A1 FR 2412079 A1 FR2412079 A1 FR 2412079A1 FR 7737509 A FR7737509 A FR 7737509A FR 7737509 A FR7737509 A FR 7737509A FR 2412079 A1 FR2412079 A1 FR 2412079A1
Authority
FR
France
Prior art keywords
pass filter
distribution network
fet switches
isolating circuit
blocking signals
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
FR7737509A
Other languages
French (fr)
Other versions
FR2412079B1 (en
Inventor
Jean Coignet
Fermin Paul
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.)
Electricite de France SA
Original Assignee
Electricite de France SA
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 Electricite de France SA filed Critical Electricite de France SA
Priority to FR7737509A priority Critical patent/FR2412079A1/en
Publication of FR2412079A1 publication Critical patent/FR2412079A1/en
Application granted granted Critical
Publication of FR2412079B1 publication Critical patent/FR2412079B1/fr
Granted legal-status Critical Current

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
    • G01R19/257—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques using analogue/digital converters of the type with comparison of different reference values with the value of voltage or current, e.g. using step-by-step method
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/02—Details
    • H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
  • Measurement Of Current Or Voltage (AREA)

Abstract

The event signal is emitted by fault sensor on electrical distribution network. Resultant voltage signal is measured and displayed in numerical form. Signal to be measured is applied via low pass filter (1) to amplitude detector (2) whose amplifier (20) drives current modulator (24) with input to isolating amplifier (27). A resistance bridge (28) output is passed to analogue to digital converter (6) which provides input to buffer memory (7). FET switches (13, 21) at filter provide blocking signals for isolating circuit (29) at output of a multivibrator (4). A buffer (3) releases or blocks multivibrator when even is signalled (30) allowing a univibrator (5) to clock the buffer memory to display (8).
FR7737509A 1977-12-13 1977-12-13 Electrical power distribution network fault detector - has FET switches with low-pass filter providing blocking signals for isolating circuit at multivibrator output Granted FR2412079A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7737509A FR2412079A1 (en) 1977-12-13 1977-12-13 Electrical power distribution network fault detector - has FET switches with low-pass filter providing blocking signals for isolating circuit at multivibrator output

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7737509A FR2412079A1 (en) 1977-12-13 1977-12-13 Electrical power distribution network fault detector - has FET switches with low-pass filter providing blocking signals for isolating circuit at multivibrator output

Publications (2)

Publication Number Publication Date
FR2412079A1 true FR2412079A1 (en) 1979-07-13
FR2412079B1 FR2412079B1 (en) 1981-10-02

Family

ID=9198779

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7737509A Granted FR2412079A1 (en) 1977-12-13 1977-12-13 Electrical power distribution network fault detector - has FET switches with low-pass filter providing blocking signals for isolating circuit at multivibrator output

Country Status (1)

Country Link
FR (1) FR2412079A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2480523A1 (en) * 1980-04-15 1981-10-16 Westinghouse Electric Corp CIRCUIT DISPLAY APPARATUS AND MULTI-PARAMETER INPUT
FR2481534A1 (en) * 1980-04-15 1981-10-30 Westinghouse Electric Corp CIRCUIT BREAKER

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2480523A1 (en) * 1980-04-15 1981-10-16 Westinghouse Electric Corp CIRCUIT DISPLAY APPARATUS AND MULTI-PARAMETER INPUT
FR2481534A1 (en) * 1980-04-15 1981-10-30 Westinghouse Electric Corp CIRCUIT BREAKER

Also Published As

Publication number Publication date
FR2412079B1 (en) 1981-10-02

Similar Documents

Publication Publication Date Title
ES464949A1 (en) Interface unit for use between analog sensors and a microprocessor
GB1537603A (en) Transducer signal amplifier and transducer bias circuit
JPS5551361A (en) Range switching device for electric measuring instrument
ES8103619A1 (en) Voltage-to-frequency-converter
FR2412079A1 (en) Electrical power distribution network fault detector - has FET switches with low-pass filter providing blocking signals for isolating circuit at multivibrator output
GB1495133A (en) Impact impulse measuring device
DE3785203D1 (en) MEASURING CIRCUIT.
JPS52145060A (en) Circuit for linearizing output signal of detecting part
ZA784095B (en) Improvements in or relating to circuit arrangements for converting analogue signals to digital signals and vice versa for conference-connections in telecommunications systems
FR2329975A1 (en) Digital linearisation for non-linear analogue signals - produces correction code from comparison of signal with straight-line function
EP0254388A3 (en) Frequency-measuring electrical apparatus
GB1298819A (en) Digital-analogue converter
SU978199A2 (en) Analog memory device
JPS5750047A (en) Analog input device
JPS53144240A (en) Signal detection circuit
JPS6429024A (en) Digital peak detector
JPS5529722A (en) Current measuring unit
BIDDLE Charge-coupled devices for analog signal processing: A circuit study[M. S. Thesis]
JPS6439831A (en) Analog/digital converter
GB1020756A (en) System for measuring the period of a nuclear reactor using frequency conversion or period conversion
UA9849A (en) Device for measurement of extremes of electric signals
KR930013959A (en) Hybrid Circuit Board Measurement Circuit by Computer Control
FR2307250A1 (en) Electronics unit for calculation and printout - is for peak values of measurement signals in each measurement channel
GB1499832A (en) Exposure meters
JPS6344166U (en)

Legal Events

Date Code Title Description
CL Concession to grant licences
ST Notification of lapse