GB2049959B - Means for sensing the ratio between the line voltage and the frequency of an ac network - Google Patents

Means for sensing the ratio between the line voltage and the frequency of an ac network

Info

Publication number
GB2049959B
GB2049959B GB8013451A GB8013451A GB2049959B GB 2049959 B GB2049959 B GB 2049959B GB 8013451 A GB8013451 A GB 8013451A GB 8013451 A GB8013451 A GB 8013451A GB 2049959 B GB2049959 B GB 2049959B
Authority
GB
United Kingdom
Prior art keywords
sensing
network
frequency
ratio
line voltage
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
GB8013451A
Other languages
English (en)
Other versions
GB2049959A (en
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
Publication of GB2049959A publication Critical patent/GB2049959A/en
Application granted granted Critical
Publication of GB2049959B publication Critical patent/GB2049959B/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)
GB8013451A 1979-04-24 1980-04-23 Means for sensing the ratio between the line voltage and the frequency of an ac network Expired GB2049959B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
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 (2)

Publication Number Publication Date
GB2049959A GB2049959A (en) 1980-12-31
GB2049959B true GB2049959B (en) 1983-01-12

Family

ID=20337884

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8013451A Expired GB2049959B (en) 1979-04-24 1980-04-23 Means for sensing the ratio between the line voltage and the frequency of an ac 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
CA1175487A (en) 1984-10-02
GB2049959A (en) 1980-12-31
SE416757B (sv) 1981-02-02
CH650079A5 (de) 1985-06-28
FR2455285B1 (OSRAM) 1985-04-19
DE3014096A1 (de) 1980-11-13
FR2455285A1 (fr) 1980-11-21

Similar Documents

Publication Publication Date Title
JPS5575348A (en) Circuit for controlling and transmitting ac voltage
JPS55141672A (en) Measuring device for ac or dc voltage and resistance
JPS5631360A (en) Ac generator
GB2021326B (en) Alternating current corona discharge apparatus
GB2034487B (en) Alternating current measuring devices
JPS5654364A (en) Electronic 33phase ac wattthour meter
JPS5660304A (en) Induction type measuring apparatus
DE3064847D1 (en) An oscillator and an eprom including such an oscillator
JPS5692548A (en) Electrostatic probe
GB2058495B (en) Inverter-motor system with different control characteristics for inverter voltage and frequency
DE3071717D1 (en) Superconducting induction apparatus
JPS56125113A (en) Voltage frequency converter
GB2040313B (en) Disc-electrophoretic immunoassays and apparatus therefor
GB2049959B (en) Means for sensing the ratio between the line voltage and the frequency of an ac network
DE3372233D1 (en) Device and method for measuring the voltage of a hidden object
JPS55146523A (en) Method and device for generating voltage smoothed from multiiphase ac
DE3275256D1 (en) Fixed frequency voltage regulator
AU571942B2 (en) Apparatus for measuring the magnitude of an ac voltage
JPS5674265A (en) Copier and operating same
JPS52112752A (en) Ac constant voltage unit
GB2044940B (en) Testing of induction motors
JPS5620311A (en) Ac voltage comparator circuit disposition
JPS52144760A (en) Ac constant voltage unit
JPS5691664A (en) Ac generator
JPS53136647A (en) Ac constant voltage unit

Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee