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CS742080A1 - Zarizeni k merni elektrickych proudu - Google Patents

Zarizeni k merni elektrickych proudu

Info

Publication number
CS742080A1
CS742080A1 CS807420A CS742080A CS742080A1 CS 742080 A1 CS742080 A1 CS 742080A1 CS 807420 A CS807420 A CS 807420A CS 742080 A CS742080 A CS 742080A CS 742080 A1 CS742080 A1 CS 742080A1
Authority
CS
Czechoslovakia
Prior art keywords
current
transformers
transformer
merni
elektrickych
Prior art date
Application number
CS807420A
Other languages
Czech (cs)
Other versions
CS255502B1 (en
Inventor
Jochen Dr Ing Ermisch
Werner Prof Dr Brendler
Original Assignee
Ermisch Jochen
Brendler Werner
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 Ermisch Jochen, Brendler Werner filed Critical Ermisch Jochen
Publication of CS742080A1 publication Critical patent/CS742080A1/en
Publication of CS255502B1 publication Critical patent/CS255502B1/en

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
    • G01R15/18—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
    • G01R15/185—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 with compensation or feedback windings or interacting coils, e.g. 0-flux sensors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R17/00—Measuring arrangements involving comparison with a reference value, e.g. bridge
    • G01R17/02—Arrangements in which the value to be measured is automatically compared with a reference value
    • G01R17/06—Automatic balancing arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/20—Instruments transformers
    • H01F38/22—Instruments transformers for single phase ac
    • H01F38/28—Current transformers
    • H01F38/32—Circuit arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
  • Transformers For Measuring Instruments (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Control Of Eletrric Generators (AREA)
  • Percussion Or Vibration Massage (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Electroluminescent Light Sources (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Testing Electric Properties And Detecting Electric Faults (AREA)

Abstract

1. Measuring arrangement for electric currents, comprising two transformers (1, 2) wherein the current to be measured flows through the primary winding (5) of the one transformer (1) and a current representing the current to be measured flows through the primary winding (6) of the other transformer (2), characterized in that each of the transformers (1, 2) includes a magnetic core and both have substantially the same transformation characteristic, that the secondary windings (3, 4) of both transformers are connected in parallel, and that an active four-terminal network (7) is connected to the juncture of the secondary windings (3, 4) said network being controlled by the difference between the currents of the secondary windings (3, 4) and driving the current in the primary winding (6) of the other transformer (2).
CS807420A 1979-11-30 1980-11-03 Electric currents measuring device CS255502B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DD79217290A DD157981A3 (en) 1979-11-30 1979-11-30 MEASURING ARRANGEMENT FOR ELECTRIC STROEME

Publications (2)

Publication Number Publication Date
CS742080A1 true CS742080A1 (en) 1987-08-13
CS255502B1 CS255502B1 (en) 1988-03-15

Family

ID=5521351

Family Applications (1)

Application Number Title Priority Date Filing Date
CS807420A CS255502B1 (en) 1979-11-30 1980-11-03 Electric currents measuring device

Country Status (12)

Country Link
EP (1) EP0029903B1 (en)
JP (1) JPS5722567A (en)
AT (1) ATE6699T1 (en)
BG (1) BG34868A1 (en)
CS (1) CS255502B1 (en)
DD (1) DD157981A3 (en)
DE (1) DE3067017D1 (en)
HU (1) HU190346B (en)
PL (1) PL133866B1 (en)
RO (1) RO79828A (en)
SU (1) SU1394153A1 (en)
YU (1) YU281780A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3435267C2 (en) * 1984-09-26 1986-10-30 ANT Nachrichtentechnik GmbH, 7150 Backnang Current measuring device
GB8805245D0 (en) * 1988-03-04 1988-04-07 Cambridge Consultants Active current transformer
GB2282893A (en) * 1993-10-13 1995-04-19 Qifeng Xu External simulator of current transformers
EP1930735A1 (en) * 2006-12-08 2008-06-11 HÜTTINGER Elektronik GmbH + Co. KG Method and device for measuring alternating current

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE603514C (en) * 1927-06-01 1934-10-02 Siemens & Halske Akt Ges Dry plate rectifier arrangement with upstream amplifier, especially for measuring purposes
US2358480A (en) * 1942-02-12 1944-09-19 Int Standard Electric Corp Current measuring device
DE1076260B (en) * 1958-06-06 1960-02-25 Hans Ritz Dr Ing Current transformer with two cores and error compensation through an electronic amplifier
DE2632377A1 (en) * 1976-07-19 1978-01-26 Friedl Richard Current measurement transducer with digital output - is suitable for digital wattmeters and uses current feedback comparison technique
DE2812303C2 (en) * 1978-03-21 1983-12-29 Deutsche Zähler-Gesellschaft Nachf. A. Stepper & Co (GmbH & Co), 2000 Hamburg Current transformer arrangement with electronic error compensation

Also Published As

Publication number Publication date
BG34868A1 (en) 1983-12-15
HU190346B (en) 1986-08-28
CS255502B1 (en) 1988-03-15
DE3067017D1 (en) 1984-04-19
YU281780A (en) 1983-10-31
JPS5722567A (en) 1982-02-05
PL133866B1 (en) 1985-07-31
RO79828A (en) 1982-09-09
PL228112A1 (en) 1981-09-18
SU1394153A1 (en) 1988-05-07
EP0029903B1 (en) 1984-03-14
EP0029903A1 (en) 1981-06-10
ATE6699T1 (en) 1984-03-15
JPS6411914B2 (en) 1989-02-27
DD157981A3 (en) 1982-12-22

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