CH237212A - Capacitive voltage converter. - Google Patents

Capacitive voltage converter.

Info

Publication number
CH237212A
CH237212A CH237212DA CH237212A CH 237212 A CH237212 A CH 237212A CH 237212D A CH237212D A CH 237212DA CH 237212 A CH237212 A CH 237212A
Authority
CH
Switzerland
Prior art keywords
voltage converter
capacitive voltage
capacitive
spark gap
choke coil
Prior art date
Application number
Other languages
German (de)
Inventor
Fides Gesellschaft Beschraenk
Original Assignee
Fides Gmbh
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 Fides Gmbh filed Critical Fides Gmbh
Publication of CH237212A publication Critical patent/CH237212A/en

Links

Classifications

    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Or Transformers For Communication (AREA)

Description

  

      Ilapazitiver    Spannungswandler.    Gegenstand der Erfindung ist ein     kapa-          zitiver    Spannungswandler, wie ihn beispiels  weise die beigegebene Figur zeigt. Dieser be  steht aus einem     kapazitiven        Spannungs-          teiler        S    mit beispielsweise zwei Kondensato  ren<I>Cl,</I>     C2;

      an letztere Kapazität ist ein       Mittelspannungskreis    angeschlossen, der sei  nerseits wieder aus einer Drosselspule     Dr    und  einem     Zwischenspannungswandler        W        besteht.     Bei derartigen     kapazitiven        Spannungswand-          lern    besteht die Gefahr, dass, wenn der  Zwischenwandler     sekundKrseitigkurzgeschlos-          sen    wird,

   an der Drosselspule     bezw.    an der  Kapazität     C--    infolge Resonanz eine hohe       Spannung        auftritt,    welche unter Umständen  die Isolation dieser Schaltungsteile gefähr  den     kann.    Die     Anbringung    von Funken  strecken parallel zu der Drossel     Dr    oder, wie  punktiert angedeutet, parallel zum Konden  saW     C2    ist insofern ungünstig, als die  Schutzfunkenstrecken     unmittelbar    an die  Mittelspannung angeschlossen werden müssen    und die zu schützenden Teile sich meist unter  Öl befinden, so dass das Anbringen einer sol  chen Schutzfunkenstrecke nur in einem be  sonderen,

   mit Luft gefüllten Gehäuse mög  lich ist.  



  Dieser Nachteil ist beim     kapazitiven     Spannungswandler nach der Erfindung da  durch vermieden, dass die Drosselspule mit  einer Sekundärwicklung versehen ist, an  welche die in den ausserhalb des ölgefüllten  Gehäuses des     kapazitiven        Spannungswand-          lers    liegenden Luftraum verlegte Schutz  funkenstrecke angeschlossen ist.  



  Die Figur zeigt ein     Ausführungsbeispiel     der Erfindung, welches ohne weiteres     ver-          ständlieh    ist.    Die Drosselspule     Dr    ist mit einer Sekun  därwicklung versehen, welche auf die Fun  kenstrecke f arbeitet. Durch geeignete Wahl  des     Übersetzungsverhältnisses    der Wicklun  gen der Drosselspule kann die sonst mehrere       kV    betragende     Ansprechspannung    der Schutz-           funkenstrecke    auf eine nur wenige     kV    be  tragende     Ansprechspannung        herabtransfor-          miert    werden.

   Auf diese Weise ist es mög  lich, mittels normaler kleiner     Porzellandureli-          führungen    die Enden der     Sekundärwiclzlim.;     der Drosselspule nach aussen zu führen.



      Ilapacitive voltage converter. The subject of the invention is a capacitive voltage converter, such as the example shown in the accompanying figure. This consists of a capacitive voltage divider S with, for example, two capacitors <I> Cl, </I> C2;

      A medium-voltage circuit is connected to the latter capacitance, which again consists of a choke coil Dr and an intermediate voltage converter W. With capacitive voltage transformers of this type, there is a risk that if the intermediate transformer is short-circuited on the secondary side,

   on the choke coil respectively. A high voltage occurs at the capacitance C-- due to resonance, which under certain circumstances can endanger the insulation of these circuit parts. The application of sparks parallel to the throttle Dr or, as indicated by dotted lines, parallel to the condenser SAW C2 is unfavorable in that the protective spark gaps must be connected directly to the medium voltage and the parts to be protected are usually under oil, so that the installation such a protective spark gap only in a special one,

   air-filled housing is possible, please include.



  In the capacitive voltage converter according to the invention, this disadvantage is avoided by providing the choke coil with a secondary winding to which the protective spark gap laid in the air space outside the oil-filled housing of the capacitive voltage converter is connected.



  The figure shows an exemplary embodiment of the invention which is readily understandable. The choke coil Dr is provided with a secondary winding which works on the spark gap f. By suitable selection of the transformation ratio of the windings of the choke coil, the response voltage of the protective spark gap, which is otherwise several kV, can be transformed down to a response voltage of only a few kV.

   In this way it is possible to use normal small porcelain thread guides to open the ends of the secondary winding; to lead the choke coil to the outside.

Claims (1)

PATENTANSPRUCH: Kapazitiver Spannungswandler, bestehend aus einem kapazitiven Spannungsteiler, an den ein aus Drossel und Zwischenspannungs- wandler gebildeter Mittelspannungskreis an geschlossen ist, dadurch gekennzeichnet, dass die Drosselspule mit einer Sekundärwicklung versehen ist, an welche die in den ausserhalb des ölgefüllten Gehäuses des kapazitiven Spannungswandlers liegenden Luftraum ver legte Schutzfunkenstrecke angeschlossen ist. PATENT CLAIM: Capacitive voltage converter, consisting of a capacitive voltage divider to which a medium-voltage circuit formed from a choke and intermediate voltage converter is connected, characterized in that the inductor is provided with a secondary winding to which the capacitive voltage converter in the outside of the oil-filled housing the protective spark gap is connected. UNTERANSPRUCH: Kapazitiver Spannungswandler nach Pa tentanspruch, gekennzeichnet durch ein sol ches Übersetzungsverhältnis der beidenWick- lungen der Drosselspule, dass die Ansprech- spannung der Schutzfunkenstrecke auf einen Bruchteil der abzufangenden Überspannung herabgesetzt ist. "Eides" Gesellschaft für die Verwaltung und Verwertung von gewerblichen Schutzrechten mit beschränkter Haftung. Vertreterin: Albiswerk Zürich AG., Zürich. SUBSTANTIAL CLAIM: Capacitive voltage converter according to patent claim, characterized by such a transformation ratio of the two windings of the choke coil that the response voltage of the protective spark gap is reduced to a fraction of the overvoltage to be absorbed. "Eides" company for the administration and exploitation of industrial property rights with limited liability. Representative: Albiswerk Zürich AG., Zürich.
CH237212D 1942-10-20 1943-10-13 Capacitive voltage converter. CH237212A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE237212X 1942-10-20

Publications (1)

Publication Number Publication Date
CH237212A true CH237212A (en) 1945-04-15

Family

ID=5902959

Family Applications (1)

Application Number Title Priority Date Filing Date
CH237212D CH237212A (en) 1942-10-20 1943-10-13 Capacitive voltage converter.

Country Status (1)

Country Link
CH (1) CH237212A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1026421B (en) * 1955-01-31 1958-03-20 Licentia Gmbh Capacitive voltage converter with resonance reactor
DE1165745B (en) * 1959-12-07 1964-03-19 Micafil Ag Capacitive voltage converter with inductive intermediate circuit and means for suppressing relaxation oscillations due to ferroresonance
US3517263A (en) * 1966-05-31 1970-06-23 Nissin Electric Co Ltd Capacitor voltage transeormer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1026421B (en) * 1955-01-31 1958-03-20 Licentia Gmbh Capacitive voltage converter with resonance reactor
DE1165745B (en) * 1959-12-07 1964-03-19 Micafil Ag Capacitive voltage converter with inductive intermediate circuit and means for suppressing relaxation oscillations due to ferroresonance
US3517263A (en) * 1966-05-31 1970-06-23 Nissin Electric Co Ltd Capacitor voltage transeormer

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