GB928923A - Circuit arrangement for preventing sawtooth oscillations in capacitive potential transformers - Google Patents

Circuit arrangement for preventing sawtooth oscillations in capacitive potential transformers

Info

Publication number
GB928923A
GB928923A GB4007860A GB4007860A GB928923A GB 928923 A GB928923 A GB 928923A GB 4007860 A GB4007860 A GB 4007860A GB 4007860 A GB4007860 A GB 4007860A GB 928923 A GB928923 A GB 928923A
Authority
GB
United Kingdom
Prior art keywords
impedance
preventing
circuit arrangement
potential transformers
nov
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
GB4007860A
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.)
Micafil AG
Original Assignee
Micafil AG
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 Micafil AG filed Critical Micafil AG
Publication of GB928923A publication Critical patent/GB928923A/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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/341—Preventing or reducing no-load losses or reactive currents
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/42—Circuits specially adapted for the purpose of modifying, or compensating for, electric characteristics of transformers, reactors, or choke coils
    • H01F27/422—Circuits specially adapted for the purpose of modifying, or compensating for, electric characteristics of transformers, reactors, or choke coils for instrument transformers
    • H01F27/425—Circuits specially adapted for the purpose of modifying, or compensating for, electric characteristics of transformers, reactors, or choke coils for instrument transformers for voltage transformers
    • 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
    • H01F38/24—Voltage transformers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/04—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for transformers
    • H02H7/05—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for transformers for capacitive voltage transformers, e.g. against resonant conditions
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/005—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection avoiding undesired transient conditions
    • H02H9/007—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection avoiding undesired transient conditions avoiding or damping oscillations, e.g. fenoresonance or travelling waves

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Dc-Dc Converters (AREA)

Abstract

928,923. Capacitive voltage transformers; protective arrangements. MICAFIL A.G. Nov. 22, 1960 [Nov. 25, 1959], No. 40078/60. Addition to 828,365. Class 38 (4). A modification of the circuit shown in Fig. 3 of the parent Specification in order to prevent undesirable oscillatory conditions from tripping network protection relays, provides for the impedance Z 2 to be in series with a resistor R which itself has a further impedance Z 3 either in series or parallel connection with it. The impedance Z 3 possesses a falling impedance characteristic to rising potentials as, for example, voltage-dependent resistors, rectifiers used in their forward direction or saturable reactors.
GB4007860A 1959-11-25 1960-11-22 Circuit arrangement for preventing sawtooth oscillations in capacitive potential transformers Expired GB928923A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH8108759A CH378414A (en) 1959-11-25 1959-11-25 Switching arrangement to avoid relaxation oscillations in capacitive voltage converters

Publications (1)

Publication Number Publication Date
GB928923A true GB928923A (en) 1963-06-19

Family

ID=4538493

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4007860A Expired GB928923A (en) 1959-11-25 1960-11-22 Circuit arrangement for preventing sawtooth oscillations in capacitive potential transformers

Country Status (4)

Country Link
CH (1) CH378414A (en)
DE (2) DE1055681B (en)
GB (1) GB928923A (en)
NL (2) NL123022C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3517263A (en) * 1966-05-31 1970-06-23 Nissin Electric Co Ltd Capacitor voltage transeormer
EP2620959A1 (en) * 2012-01-26 2013-07-31 Eaton Industries (Netherlands) B.V. Voltage measuring transformer

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1257262B (en) * 1965-04-05 1967-12-28 Siemens Ag Circuit arrangement for damping breakdown vibrations
DE1265836B (en) * 1965-04-20 1968-04-11 Siemens Ag Circuit arrangement for damping breakdown vibrations
DE1763658B1 (en) * 1968-07-11 1971-11-11 Licentia Gmbh ARRANGEMENT FOR DAMPING TIPPING VIBRATIONS IN THE MEDIUM VOLTAGE CIRCUIT OF CAPACITIVE VOLTAGE CONVERTERS
CA1014615A (en) * 1972-11-09 1977-07-26 Howard R. Lucas Protective system for a capacitor voltage transformer
DE2614780C2 (en) * 1976-04-06 1983-12-01 Robert Bosch Gmbh, 7000 Stuttgart Ignition system with a device for limiting the ignition voltage
FR2534411A1 (en) * 1982-10-11 1984-04-13 Bouchaut Georges Static transformer by 220-volt primary 50 hertz capacitor.
JPH0576136A (en) * 1991-09-13 1993-03-26 Hitachi Ltd Power supply system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1055120B (en) * 1958-02-15 1959-04-16 Licentia Gmbh Capacitive voltage converter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3517263A (en) * 1966-05-31 1970-06-23 Nissin Electric Co Ltd Capacitor voltage transeormer
EP2620959A1 (en) * 2012-01-26 2013-07-31 Eaton Industries (Netherlands) B.V. Voltage measuring transformer

Also Published As

Publication number Publication date
DE1269719B (en) 1968-06-06
DE1055681B (en) 1959-04-23
NL257836A (en)
CH378414A (en) 1964-06-15
NL123022C (en)

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