SE394033B - Overvakningsenhet for frekvensavvikelse - Google Patents

Overvakningsenhet for frekvensavvikelse

Info

Publication number
SE394033B
SE394033B SE7310189A SE7310189A SE394033B SE 394033 B SE394033 B SE 394033B SE 7310189 A SE7310189 A SE 7310189A SE 7310189 A SE7310189 A SE 7310189A SE 394033 B SE394033 B SE 394033B
Authority
SE
Sweden
Prior art keywords
monitoring unit
frequency deviation
deviation monitoring
frequency
unit
Prior art date
Application number
SE7310189A
Other languages
English (en)
Swedish (sv)
Inventor
C G Blanyer
Original Assignee
Abex 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 Abex Corp filed Critical Abex Corp
Publication of SE394033B publication Critical patent/SE394033B/xx

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Networks Using Active Elements (AREA)
  • Measuring Frequencies, Analyzing Spectra (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Amplifiers (AREA)
SE7310189A 1972-07-24 1973-07-20 Overvakningsenhet for frekvensavvikelse SE394033B (sv)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US27420372A 1972-07-24 1972-07-24

Publications (1)

Publication Number Publication Date
SE394033B true SE394033B (sv) 1977-05-31

Family

ID=23047222

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7310189A SE394033B (sv) 1972-07-24 1973-07-20 Overvakningsenhet for frekvensavvikelse

Country Status (10)

Country Link
US (1) US3755734A (nl)
JP (2) JPS4946776A (nl)
CA (1) CA972036A (nl)
CH (1) CH552219A (nl)
DE (1) DE2325641A1 (nl)
FR (1) FR2193978B1 (nl)
GB (1) GB1418773A (nl)
IT (1) IT980189B (nl)
NL (1) NL156511B (nl)
SE (1) SE394033B (nl)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4319329A (en) * 1980-02-21 1982-03-09 Iowa State University Research Foundation, Inc. Frequency measuring and monitoring apparatus, methods and systems
JPS57112997U (nl) * 1981-01-05 1982-07-13
US4547726A (en) * 1983-08-01 1985-10-15 General Electric Company Means and method for measuring power system frequency
US5721689A (en) * 1995-12-18 1998-02-24 Abb Power T&D Company Inc. System and method for phasor estimation and frequency tracking in digital protection systems
US6185482B1 (en) 1998-03-10 2001-02-06 Abb Power T&D Company Inc. System and method for rms overcurrent backup function
JP2010271091A (ja) 2009-05-20 2010-12-02 Seiko Epson Corp 周波数測定装置
JP5517033B2 (ja) 2009-05-22 2014-06-11 セイコーエプソン株式会社 周波数測定装置
JP5440999B2 (ja) * 2009-05-22 2014-03-12 セイコーエプソン株式会社 周波数測定装置
JP5582447B2 (ja) 2009-08-27 2014-09-03 セイコーエプソン株式会社 電気回路、同電気回路を備えたセンサーシステム、及び同電気回路を備えたセンサーデバイス
JP5815918B2 (ja) 2009-10-06 2015-11-17 セイコーエプソン株式会社 周波数測定方法、周波数測定装置及び周波数測定装置を備えた装置
JP5876975B2 (ja) 2009-10-08 2016-03-02 セイコーエプソン株式会社 周波数測定装置及び周波数測定装置における変速分周信号の生成方法
JP5883558B2 (ja) 2010-08-31 2016-03-15 セイコーエプソン株式会社 周波数測定装置及び電子機器

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2480128A (en) * 1945-10-03 1949-08-30 Standard Telephones Cables Ltd Frequency measuring system
US3119064A (en) * 1961-12-01 1964-01-21 Hughes Aircraft Co Quadrature phase detector employing transistor switching means

Also Published As

Publication number Publication date
NL7306726A (nl) 1974-01-28
CA972036A (en) 1975-07-29
NL156511B (nl) 1978-04-17
CH552219A (de) 1974-07-31
FR2193978B1 (nl) 1977-07-29
US3755734A (en) 1973-08-28
JPS4946776A (nl) 1974-05-04
GB1418773A (en) 1975-12-24
JPS542475U (nl) 1979-01-09
IT980189B (it) 1974-09-30
DE2325641A1 (de) 1974-02-14
FR2193978A1 (nl) 1974-02-22

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