CA1175487A - Means for sensing the ratio between the line voltage and the frequency of an a.c. network - Google Patents

Means for sensing the ratio between the line voltage and the frequency of an a.c. network

Info

Publication number
CA1175487A
CA1175487A CA000350515A CA350515A CA1175487A CA 1175487 A CA1175487 A CA 1175487A CA 000350515 A CA000350515 A CA 000350515A CA 350515 A CA350515 A CA 350515A CA 1175487 A CA1175487 A CA 1175487A
Authority
CA
Canada
Prior art keywords
input signal
integrating
frequency
signal
voltage amplitude
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
CA000350515A
Other languages
English (en)
French (fr)
Inventor
Stig Aviander
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.)
ABB Norden Holding AB
Original Assignee
ASEA AB
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 ASEA AB filed Critical ASEA AB
Application granted granted Critical
Publication of CA1175487A publication Critical patent/CA1175487A/en
Expired 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
    • G01R19/10—Measuring sum, difference or ratio
    • 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
    • G01R19/04—Measuring peak values or amplitude or envelope of AC or of pulses
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/34—Testing dynamo-electric machines
    • G01R31/343—Testing dynamo-electric machines in operation
    • 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
    • H02H3/46—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 responsive to frequency deviations

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
  • Protection Of Static Devices (AREA)
CA000350515A 1979-04-24 1980-04-23 Means for sensing the ratio between the line voltage and the frequency of an a.c. network Expired CA1175487A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE7903585-3 1979-04-24
SE7903585A SE416757B (sv) 1979-04-24 1979-04-24 Anordning anslutning till ett vexelstromsnet for att avkenna spenning i detta och att ge ett utgangsverde som er proportionellt med forhallandet mellan netets linjespenning och frekvens

Publications (1)

Publication Number Publication Date
CA1175487A true CA1175487A (en) 1984-10-02

Family

ID=20337884

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000350515A Expired CA1175487A (en) 1979-04-24 1980-04-23 Means for sensing the ratio between the line voltage and the frequency of an a.c. network

Country Status (6)

Country Link
CA (1) CA1175487A (OSRAM)
CH (1) CH650079A5 (OSRAM)
DE (1) DE3014096A1 (OSRAM)
FR (1) FR2455285A1 (OSRAM)
GB (1) GB2049959B (OSRAM)
SE (1) SE416757B (OSRAM)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3044020A1 (de) * 1980-11-22 1982-06-03 Hermann Dr. 3171 Rötgesbüttel Lühr Magnetometer mit digitaler messwertdarstellung nach dem impulsintegrationsverfahren
KR850000683A (ko) * 1983-06-30 1985-02-28 카다야마 히도하지로 가변주파수 전력계통의 전압검출 장치

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3546534A (en) * 1968-01-31 1970-12-08 Gen Electric Overexcitation relay
US3717818A (en) * 1972-01-10 1973-02-20 J Herbst Instantaneous voltage detector

Also Published As

Publication number Publication date
SE7903585L (sv) 1980-10-25
GB2049959A (en) 1980-12-31
SE416757B (sv) 1981-02-02
CH650079A5 (de) 1985-06-28
GB2049959B (en) 1983-01-12
FR2455285B1 (OSRAM) 1985-04-19
DE3014096A1 (de) 1980-11-13
FR2455285A1 (fr) 1980-11-21

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Legal Events

Date Code Title Description
MKEX Expiry