GB1182412A - Improvements in or relating to Current Measurement - Google Patents

Improvements in or relating to Current Measurement

Info

Publication number
GB1182412A
GB1182412A GB516066A GB516066A GB1182412A GB 1182412 A GB1182412 A GB 1182412A GB 516066 A GB516066 A GB 516066A GB 516066 A GB516066 A GB 516066A GB 1182412 A GB1182412 A GB 1182412A
Authority
GB
United Kingdom
Prior art keywords
transformer
transmitter
output
current
frequency
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
Application number
GB516066A
Inventor
Leonard George Wardle
John Alfred Skerrett
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.)
English Electric Co Ltd
Original Assignee
English Electric Co Ltd
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 English Electric Co Ltd filed Critical English Electric Co Ltd
Priority to GB516066A priority Critical patent/GB1182412A/en
Publication of GB1182412A publication Critical patent/GB1182412A/en
Expired legal-status Critical Current

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
    • G01R15/04—Voltage dividers
    • G01R15/06—Voltage dividers having reactive components, e.g. capacitive transformer
    • 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

Landscapes

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

Abstract

1,182,412. Protective arrangements. ENGLISH ELECTRIC CO. Ltd. 4 May, .1967 [5 Feb., 1966], No. 5160/66. Heading H2K. [Also in Division G1] Current in a high voltage line is measured by producing an A.C. carrier signal modulated in a manner representing the value of the current, and coupling this signal through a capacitive coupling incorporating series connected capacitors to a demodulator at low voltage which receives the carrier signal and translates it into an output representing the current value. The current at high voltage on line 12 is transformer coupled at 42 to a voltage-frequency converter contained in the transmitter arrangement 41, the derived frequency being used to modulate a carrier frequency in the transmitter, which is supplied from a pack 48. The output from the transmitter 41 is coupled to a bifilar wound transformer 16 tuned to the carrier frequency and is transmitted via the series capacitor columns 24, 34, to a further bifilar transformer and thence to an output demodulator 44. Power is supplied from an oscillator 45 at a different frequency to that of the carrier frequency via the tuned transformer circuits 18, 17 to the pack 48, where it . is rectified and smoothed before being supplied to the transmitter 41. The bifilar transformer windings are such that the inductances of the windings relative to through currents cancel. The transformercapacitor system 11 may be used in a carriercurrent protective system. The output of demodulator 44 may operate a relay.
GB516066A 1966-02-05 1966-02-05 Improvements in or relating to Current Measurement Expired GB1182412A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB516066A GB1182412A (en) 1966-02-05 1966-02-05 Improvements in or relating to Current Measurement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB516066A GB1182412A (en) 1966-02-05 1966-02-05 Improvements in or relating to Current Measurement

Publications (1)

Publication Number Publication Date
GB1182412A true GB1182412A (en) 1970-02-25

Family

ID=9790822

Family Applications (1)

Application Number Title Priority Date Filing Date
GB516066A Expired GB1182412A (en) 1966-02-05 1966-02-05 Improvements in or relating to Current Measurement

Country Status (1)

Country Link
GB (1) GB1182412A (en)

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees