EP1205952B1 - Load switch for a step switch - Google Patents

Load switch for a step switch Download PDF

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Publication number
EP1205952B1
EP1205952B1 EP01122903A EP01122903A EP1205952B1 EP 1205952 B1 EP1205952 B1 EP 1205952B1 EP 01122903 A EP01122903 A EP 01122903A EP 01122903 A EP01122903 A EP 01122903A EP 1205952 B1 EP1205952 B1 EP 1205952B1
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EP
European Patent Office
Prior art keywords
mounting plate
main contact
permanent main
centring
load
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 - Lifetime
Application number
EP01122903A
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German (de)
French (fr)
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EP1205952A3 (en
EP1205952A2 (en
Inventor
Günter Dipl.-Ing. Kloth (FH)
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.)
Maschinenfabrik Reinhausen GmbH
Scheubeck GmbH and Co
Original Assignee
Maschinenfabrik Reinhausen GmbH
Maschinenfabrik Reinhausen Gebrueder Scheubeck GmbH and Co KG
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Application filed by Maschinenfabrik Reinhausen GmbH, Maschinenfabrik Reinhausen Gebrueder Scheubeck GmbH and Co KG filed Critical Maschinenfabrik Reinhausen GmbH
Publication of EP1205952A2 publication Critical patent/EP1205952A2/en
Publication of EP1205952A3 publication Critical patent/EP1205952A3/en
Application granted granted Critical
Publication of EP1205952B1 publication Critical patent/EP1205952B1/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/0005—Tap change devices
    • H01H9/0044—Casings; Mountings; Disposition in transformer housing

Definitions

  • the invention relates to a diverter switch for a tap changer with the features of the first claim.
  • a diverter switch is known from the documents "tap-changer type R and RM - Inspection Manual” and “tap-changer type R and RM - Technical Data" of the applicant.
  • Tap changers are known to be used for uninterrupted switching between different winding taps of a tapped transformer and thus for voltage regulation. They usually consist of a selector for powerless preselection of those winding tap of the tapped transformer to be switched to, and a diverter switch for the actual uninterrupted switching from the previously connected winding tap to the new, preselected winding tap.
  • the diverter switch has the necessary for such an uninterrupted, fast switching components, in particular a force storage device, switching contacts - this may be mechanical switching contacts, vacuum switching cells or thyristors -, and means for actuating the switch contacts in a predetermined switching sequence at each switching.
  • the known diverter switch has its own oil tank, usually in the form of a closed insulating cylinder in which, separated from the surrounding oil of the transformer, all the above components are. Below the diverter switch, the selector is located, which is located in the transformer oil. All components or elements of the diverter switch are designed as a complete diverter switch insert inside the separate oil pan, which can be completely pulled out of the oil pan, for inspection or maintenance, without the entire tap changer from the transformer tank in which it is mounted is, should be removed.
  • the known diverter switch insert has in its upper part a support cylinder made of insulating material which extends concentrically in the installed state within its own oil vessel. The upper end of the support cylinder forms a support plate. At the bottom of the support cylinder, the assemblies of the diverter switch described above are attached, namely the energy storage, including the switching contacts to be actuated, again below in a known manner switching resistors or varistors.
  • the support plate of the support cylinder is mounted in the assembled state in a corresponding flange on the tap changer head; upwards is a conclusion by the tap changer cover.
  • the lid of the tap changer is first removed, then the fastening screws are released, with which the support plate is fixed to the flange, and then the entire diverter switch insert can be lifted to provided for this purpose eyelets on the support plate ,
  • the described support cylinder is therefore an important component of the known diverter switch, since the entire diverter switch insert hangs on this support cylinder.
  • a diverter switch for a tap changer known having a surrounding him separate oil vessel, in the wall and these are arranged penetrating in horizontal planes for each electrical phase to be switched electrical connection contacts. These connection contacts are used for the load discharge on the one hand and the two sides A and B of the diverter switch, between which switches and the connection to the load dissipation is made.
  • a diverter switch insert is provided, which has a power storage, electrical switching means and switching resistors.
  • a horizontally extending upper bearing plate which is designed as a base plate, is also provided, which carries all the components of the diverter switch insert. This upper bearing plate is frictionally secured on its periphery on a supporting flange of the transformer housing.
  • FR 901313 A From the FR 901313 A is another tap changer known, wherein a diverter switch insert a diverter switch is fixed by the mating contact pieces form-fitting and non-positively to the reaching into the interior of the oil vessel parts of the connection contacts. This is intended to achieve a simplified assembly or disassembly of the diverter switch insert.
  • the object of the invention is to further improve the known tap changer and to provide a generic diverter switch, which is simple in construction, requires only a small space and has a high electrical strength.
  • a horizontally extending upper bearing plate is provided in a manner known per se, all the components of the diverter switch insert wearing.
  • This upper bearing plate is attached to its periphery positively and / or non-positively to the reaching into the interior of the oil vessel parts of the connection contacts.
  • the in FIG. 1 shown diverter switch has him as a surrounding component in a known manner, a closed oil vessel 1, in which circulates the separate from the transformer oil diverter switch oil.
  • the oil vessel 1 consists of an insulating cylinder, which is closed at the top of the tap changer head 2 and bottom of an oil pan bottom 3. Below the oil pan bottom 3 of - not shown - selector of the tap changer is attached.
  • This coupling tube 4 Centrally in the interior of the oil vessel 1 extends in the upper region perpendicular to a coupling tube 4.
  • This coupling tube 4 has a coupling flange 5 at the top with a toothing 6. This is in communication with a transmission, not shown, by means of which a rotary motion of a motor drive o. ⁇ . Is transmitted to the coupling tube.
  • known shields 7 are provided.
  • a further coupling flange 8 is provided, which establishes the fixed connection to the actual drive shaft 9.
  • This drive shaft 9 extends vertically through the entire diverter switch down.
  • a stator 11 which acts as a force storage carrier, that carries the components of a known force accumulator, not shown. These are a tensioned by the rotational movement of the drive shaft 9 elevator part, a releasable output carriage and an actuatable by this output shaft for actuating the also not shown Lastumschalteressore. Since such energy storage in a variety of embodiments are familiar to those skilled in the art, said items were not shown in the drawing. It is only indicated an eccentric 12 on the drive shaft 9, the on known manner spans an elevator part. Incidentally, the drive shaft 9 is guided by a bearing 13 in the stator 11 and a further bearing 14 in the upper bearing plate 10.
  • a lower bearing plate 15 is provided below the upper bearing plate 10. Between upper bearing plate 10 and lower bearing plate 15 are not shown actual switching contacts of the diverter switch, which are not the subject of the present invention. These switching contacts may be mechanical contacts, vacuum switching cells, thyristors or a combination of different types of contact. These are, depending on the underlying circuit, operated in a predetermined switching sequence after triggering the energy storage.
  • each permanent main contact pair consists of an upper permanent main contact carrier 16 and lower permanent main contact carriers 17.
  • Upper permanent main contact fingers 18 are disposed on the upper permanent main contact carrier 16 and lower permanent main contact fingers 19 are disposed on each of the two lower permanent main contact carriers.
  • the wiring is in each case by means of a movable permanent main contact 20, which rolls in succession on the different permanent main contact fingers.
  • the upper terminal 21 for the discharge of a phase is shown.
  • the terminal 21 is electrically connected to the upper permanent main contact fingers 18.
  • the connection contact 22 for the side A of the diverter switch is shown. This communicates electrically with lower permanent main contact fingers 19 of one side.
  • the further connection contact for side B lies behind it in the horizontal plane and is therefore not visible in the sectional view.
  • a gear 24 is provided in a known manner, which actuates the selector by means of an insertable into a clutch 25 further drive shaft.
  • the extension of the drive shaft 9 is guided in a bearing 26 in the oil pan bottom 3.
  • a bearing 27 for guiding the drive shaft is also located in the lower bearing plate 15.
  • Each of the already discussed upper permanent main contact carrier 16 according to the invention has an upper centering bracket 28 with an upwardly directed locking pin 29. Every lower one Permanent main contact carrier 17 has a lower centering bracket 30, each with an upwardly directed centering pin 31.
  • Each of the locking pins 29 corresponds according to the invention with locking holes 32 on the circumference of the upper bearing plate 10
  • each of the centering pins 31 corresponds with centering holes 33 on the circumference of the lower bearing plate 15th
  • the attachment of the diverter switch insert is effected in that the upper bearing plate 10, on which all components are arranged, is introduced with their locking bores 32 into the respectively corresponding locking pins 29.
  • the upper bearing plate 10 is fixed in a form-fitting manner, on the upper Zentrierbügeln 28 and is fixed in such a way.
  • an additional centering by the centering openings 33 on the circumference of the lower bearing plate 15, in which the corresponding centering pins 31 are introduced takes place in a particularly advantageous manner.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Housings And Mounting Of Transformers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Domestic Plumbing Installations (AREA)
  • Multiple-Way Valves (AREA)

Abstract

The load switch has a separate oil-filled housing (1) provided with a horizontal upper mounting plate (10), supporting all components of the load switching insert, with the parts of the electrical terminal contacts (21) for each of the switched phases lying within the oil-filled housing supported around the periphery of the upper mounting plate.

Description

Die Erfindung betrifft einen Lastumschalter für einen Stufenschalter mit den Merkmalen des ersten Patentanspruches. Ein solcher Lastumschalter ist aus den Druckschriften "Stufenschalter Typ R und RM - Inspektionsanleitung" sowie "Stufenschalter Typ R und RM - Technische Daten" der Anmelderin bekannt.The invention relates to a diverter switch for a tap changer with the features of the first claim. Such a diverter switch is known from the documents "tap-changer type R and RM - Inspection Manual" and "tap-changer type R and RM - Technical Data" of the applicant.

Stufenschalter dienen bekanntermaßen zur unterbrechungslosen Umschaltung zwischen verschiedenen Wicklungsanzapfungen eines Stufentransformators und damit zur Spannungsregelung. Sie bestehen üblicherweise aus einem Wähler zur leistungslosen Vorwahl derjenigen Wicklungsanzapfung des Stufentransformators, auf die umgeschaltet werden soll, sowie einem Lastumschalter zur eigentlichen unterbrechungslosen Umschaltung von der bisher geschalteten Wicklungsanzapfung auf die neue, vorgewählte Wicklungsanzapfung. Der Lastumschalter besitzt dazu die für eine solche unterbrechungslose, schnelle Umschaltung erforderlichen Bauteile, insbesondere einen Kraftspeicher, Schaltkontakte - dies können mechanische Schaltkontakte, Vakuumschaltzellen oder auch Thyristoren sein -, sowie Mittel zur Betätigung der Schaltkontakte in einer vorgegebenen Schaltsequenz bei jedem Umschaltvorgang.Tap changers are known to be used for uninterrupted switching between different winding taps of a tapped transformer and thus for voltage regulation. They usually consist of a selector for powerless preselection of those winding tap of the tapped transformer to be switched to, and a diverter switch for the actual uninterrupted switching from the previously connected winding tap to the new, preselected winding tap. The diverter switch has the necessary for such an uninterrupted, fast switching components, in particular a force storage device, switching contacts - this may be mechanical switching contacts, vacuum switching cells or thyristors -, and means for actuating the switch contacts in a predetermined switching sequence at each switching.

Der bekannte Lastumschalter besitzt ein eigenes Ölgefäß, üblicherweise in Form eines geschlossenen Isolierstoffzylinders, in dem sich, getrennt vom umgebenden Öl des Transformators, alle genannten Bauteile befinden. Unterhalb des Lastumschalters ist der Wähler angeordnet, der sich im Transformatorenöl befindet. Alle Bauteile bzw. Elemente des Lastumschalters sind innerhalb des separaten Ölgefäßes als kompletter Lastumschalter-Einsatz konzipiert, der vollständig aus dem Ölgefäß nach oben herausgezogen werden kann, etwa zu Inspektionen oder zur Wartung, ohne dass der gesamte Stufenschalter aus dem Transformatorenkessel, in dem er montiert ist, entfernt werden müsste. Der bekannte Lastumschalter-Einsatz besitzt in seinem oberen Bereich einen Tragzylinder aus Isolierstoff, der sich im eingebauten Zustand konzentrisch innerhalb des eigenen Ölgefäßes erstreckt. Den oberen Abschluss des Tragzylinders bildet eine Tragplatte. Unten am Tragzylinder sind die weiter oben beschriebenen Baugruppen des Lastumschalters angehängt, nämlich der Kraftspeicher, darunter die zu betätigenden Schaltkontakte, wieder darunter auf bekannte Weise Überschaltwiderstände bzw. Varistoren.The known diverter switch has its own oil tank, usually in the form of a closed insulating cylinder in which, separated from the surrounding oil of the transformer, all the above components are. Below the diverter switch, the selector is located, which is located in the transformer oil. All components or elements of the diverter switch are designed as a complete diverter switch insert inside the separate oil pan, which can be completely pulled out of the oil pan, for inspection or maintenance, without the entire tap changer from the transformer tank in which it is mounted is, should be removed. The known diverter switch insert has in its upper part a support cylinder made of insulating material which extends concentrically in the installed state within its own oil vessel. The upper end of the support cylinder forms a support plate. At the bottom of the support cylinder, the assemblies of the diverter switch described above are attached, namely the energy storage, including the switching contacts to be actuated, again below in a known manner switching resistors or varistors.

Die Tragplatte des Tragzylinders ist im montierten Zustand in einen korrespondierenden Flansch am Stufenschalterkopf eingehängt; nach oben erfolgt ein Abschluss durch den Stufenschalterdeckel. D. h., dass der Lastumschalter-Einsatz des bekannten Lastumschalters vollständig an der Tragplatte des Tragzylinders hängt und mit dieser am beschriebenen Flansch des Stufenschalterkopfes befestigt ist. Zentrisch längs durch den Lastumschalter-Einsatz erstreckt sich auf bekannte Weise die Antriebswelle, die den Kraftspeicher des Lastumschalters betätigt, weiterhin nach unten bis in den angehängten Wähler verläuft und dort auf bekannte Weise die Wählerkontakte betätigt.The support plate of the support cylinder is mounted in the assembled state in a corresponding flange on the tap changer head; upwards is a conclusion by the tap changer cover. D. h. That the diverter switch insert of the known diverter switch is completely attached to the support plate of the support cylinder and is fixed thereto with the described flange of the tap changer head. Centric longitudinally through the diverter switch insert extends in a known manner, the drive shaft which actuates the energy storage of the diverter switch, continues to run down to the attached selector and operated there in a known manner, the selector contacts.

Zur Demontage des Lastumschalter-Einsatzes, d. h. zum beschriebenen Herausziehen aus dem separaten Ölgefäß, wird zunächst der Deckel des Stufenschalters abgebaut, dann werden die Befestigungsschrauben gelöst, mit denen die Tragplatte am Flansch befestigt ist, und danach kann der komplette Lastumschalter-Einsatz an für diesen Zweck vorgesehenen Ösen an der Tragplatte herausgehoben werden. Der beschriebene Tragzylinder ist also ein wichtiges Bauteil des bekannten Lastumschalters, da der gesamte Lastumschalter-Einsatz an diesem Tragzylinder hängt.To disassemble the diverter switch insert, d. H. for the described extraction from the separate oil vessel, the lid of the tap changer is first removed, then the fastening screws are released, with which the support plate is fixed to the flange, and then the entire diverter switch insert can be lifted to provided for this purpose eyelets on the support plate , The described support cylinder is therefore an important component of the known diverter switch, since the entire diverter switch insert hangs on this support cylinder.

Diese bekannte Anordnung besitzt jedoch verschiedene Nachteile. Zunächst einmal ist sie aufwändig und teuer, da es sich bei dem Tragzylinder um ein relativ anspruchsvolles Isolierstoffteil, üblicherweise aus GFK, mit hoher mechanischer als auch elektrischer Festigkeit handeln muss. Weiterhin ergeben sich durch diesen zusätzlichen Tragzylinder elektrische Spannungsprobleme. Schließlich erfordert die bekannte Anordnung auch relativ viel Platz, da, wie oben bereits erläutert, der bekannte Lastumschalter zwei separate Isolierstoffzylinder aufweist; zunächst einmal das ihn umgebende geschlossene eigene Ölgefäß, darin im oberen Bereich der beschriebene Tragzylinder.However, this known arrangement has several disadvantages. First of all, it is costly and expensive, since it must be in the support cylinder to a relatively demanding Isolierstoffteil, usually made of GRP, with high mechanical and electrical strength. Furthermore arise through this additional support cylinder electrical voltage problems. Finally, the known arrangement also requires a relatively large amount of space, since, as already explained above, the known diverter switch has two separate insulating cylinder; First of all, the surrounding own closed oil vessel surrounding it, in the upper part of the described support cylinder.

Aus der DE 36 27 028 A ist ein Lastumschalter für einen Stufenschalter bekannt, der ein ihn umgebendes separates Ölgefäß aufweist, in dessen Wandung und diese durchdringend in horizontalen Ebenen für jede zu schaltende elektrische Phase elektrische Anschlusskontakte angeordnet sind. Diese Anschlusskontakte dienen für die Lastableitung einerseits und die beiden Seiten A und B des Lastumschalters, zwischen denen umgeschaltet und die Verbindung zur Lastableitung hergestellt wird. Im Inneren des Ölgefäßes ist ein Lastumschaltereinsatz vorgesehen, der einen Kraftspeicher, elektrische Schaltmittel sowie Überschaltwiderstände aufweist. Im Inneren des Ölgefäßes ist ferner eine waagerecht verlaufende obere Lagerplatte, die als Grundplatte ausgebildet ist, vorgesehen, die alle Bauteile des Lastumschaltereinsatzes trägt. Diese obere Lagerplatte ist an ihrem Umfang kraftschlüssig auf einem tragenden Flansch des Transformatorengehäuses befestigt.From the DE 36 27 028 A is a diverter switch for a tap changer known having a surrounding him separate oil vessel, in the wall and these are arranged penetrating in horizontal planes for each electrical phase to be switched electrical connection contacts. These connection contacts are used for the load discharge on the one hand and the two sides A and B of the diverter switch, between which switches and the connection to the load dissipation is made. Inside the oil vessel a diverter switch insert is provided, which has a power storage, electrical switching means and switching resistors. In the interior of the oil vessel, a horizontally extending upper bearing plate, which is designed as a base plate, is also provided, which carries all the components of the diverter switch insert. This upper bearing plate is frictionally secured on its periphery on a supporting flange of the transformer housing.

Aus der FR 901313 A ist ein weiterer Stufenschalter bekannt, wobei ein Lastumschaltereinsatz eines Lastumschalters durch die Gegenkontaktstücke formschlüssig als auch kraftschlüssig an den ins Innere des Ölgefäßes reichenden Teilen der Anschlusskontakte befestigt ist. Damit soll eine vereinfachte Montage bzw. Demontage des Lastumschaltereinsatzes erreicht werden.From the FR 901313 A is another tap changer known, wherein a diverter switch insert a diverter switch is fixed by the mating contact pieces form-fitting and non-positively to the reaching into the interior of the oil vessel parts of the connection contacts. This is intended to achieve a simplified assembly or disassembly of the diverter switch insert.

Aufgabe der Erfindung ist es, die bekannten Stufenschalter weiter zu verbessern und einen gattungsgemäßen Lastumschalter anzugeben, der einfach aufgebaut ist, nur einen geringen Platz erfordert und eine hohe elektrische Festigkeit besitzt.The object of the invention is to further improve the known tap changer and to provide a generic diverter switch, which is simple in construction, requires only a small space and has a high electrical strength.

Diese Aufgabe wird durch einen Lastumschalter mit den Merkmalen des ersten Patentanspruches gelöst. Die Unteransprüche betreffen besonders vorteilhafte Weiterbildungen der Erfindung.This object is achieved by a diverter switch with the features of the first claim. The subclaims relate to particularly advantageous developments of the invention.

Beim erfindungsgemäßen Lastumschalter ohne Tragzylinder ist auf an sich bekannte Weise eine waagerecht verlaufende obere Lagerplatte vorgesehen, die alle Bauteile des Lastumschaltereinsatzes trägt. Diese obere Lagerplatte ist an ihrem Umfang formschlüssig und/oder kraftschlüssig an den ins Innere des Ölgefäßes reichenden Teilen der Anschlusskontakte befestigt. Nach einem weiteren Merkmal der Erfindung stehen die Anschlusskontakte jeder Phase in montiertem Zustand des Lastumschalters im Inneren des Ölgefäßes mit Dauerhauptkontaktpaaren in Verbindung, wobei jedes Dauerhauptkontaktpaar obere und untere Dauerhauptkontaktträger besitzt, die zur Aufnahme oberer und unterer Dauerhauptkontakt-Kontaktfinger dienen. Nach einem weiteren Merkmal der Erfindung ist die beschriebene obere Lagerplatte an den jeweils oberen Dauerhauptkontaktträgern aller Phasen, die in einer horizontalen Ebene kreisförmig angeordnet sind, befestigt.In the diverter switch according to the invention without the support cylinder, a horizontally extending upper bearing plate is provided in a manner known per se, all the components of the diverter switch insert wearing. This upper bearing plate is attached to its periphery positively and / or non-positively to the reaching into the interior of the oil vessel parts of the connection contacts. According to a further feature of the invention, the terminal contacts of each phase in the assembled state of the diverter switch in the interior of the oil vessel with Dauerhauptkontaktpaaren in combination, each Dauerhauptkontaktpaar upper and lower permanent main contact carrier has, which serve to receive upper and lower permanent main contact fingers. According to a further feature of the invention, the described upper bearing plate at the respective upper permanent main contact carriers of all phases, which are arranged in a circle in a horizontal plane, fixed.

Die Erfindung soll nachfolgend beispielhaft an Hand von Zeichnungen näher erläutert werden.The invention will be explained in more detail by way of example with reference to drawings.

Es zeigen:

Fig. 1
einen schematischen Längsschnitt durch einen erfindungsgemäßen Lastumschalter, wobei verschiedene - nicht erfindungswesentliche - Bauteile bewusst weggelassen worden sind
Fig. 2
eine vergrößerte Darstellung des Details "A" aus Figur 1.
Show it:
Fig. 1
a schematic longitudinal section through a diverter switch according to the invention, wherein various - not essential to the invention - components have been deliberately omitted
Fig. 2
an enlarged view of the detail "A" from FIG. 1 ,

Der in Figur 1 dargestellte Lastumschalter besitzt als ihn umgebendes Bauteil auf bekannte Weise ein geschlossenes Ölgefäß 1, in dem das vom Transformatorenöl getrennte Lastumschalteröl zirkuliert. Das Ölgefäß 1 besteht aus einem Isolierstoffzylinder, der oben vom Stufenschalterkopf 2 und unten von einem Ölgefäßboden 3 verschlossen ist. Unterhalb des Ölgefäßbodens 3 ist der - nicht dargestellte - Wähler des Stufenschalters befestigt.The in FIG. 1 shown diverter switch has him as a surrounding component in a known manner, a closed oil vessel 1, in which circulates the separate from the transformer oil diverter switch oil. The oil vessel 1 consists of an insulating cylinder, which is closed at the top of the tap changer head 2 and bottom of an oil pan bottom 3. Below the oil pan bottom 3 of - not shown - selector of the tap changer is attached.

Zentrisch im Inneren des Ölgefäßes 1 verläuft im oberen Bereich senkrecht ein Kupplungsrohr 4. Dieses Kupplungsrohr 4 weist oben einen Kupplungsflansch 5 mit einer Verzahnung 6 auf. Diese steht mit einem nicht dargestellten Getriebe in Verbindung, mittels dessen eine Drehbewegung von einem Motorantrieb o. ä. auf das Kupplungsrohr übertragen wird. Zusätzlich sind bekannte Abschirmungen 7 vorgesehen. Am unteren Teil des Kupplungsrohres 4 ist ein weiterer Kupplungsflansch 8 vorgesehen, der die feste Verbindung zur eigentlichen Antriebswelle 9 herstellt. Diese Antriebswelle 9 verläuft senkrecht durch den gesamten Lastumschalter nach unten.Centrally in the interior of the oil vessel 1 extends in the upper region perpendicular to a coupling tube 4. This coupling tube 4 has a coupling flange 5 at the top with a toothing 6. This is in communication with a transmission, not shown, by means of which a rotary motion of a motor drive o. Ä. Is transmitted to the coupling tube. In addition, known shields 7 are provided. At the lower part of the coupling tube 4, a further coupling flange 8 is provided, which establishes the fixed connection to the actual drive shaft 9. This drive shaft 9 extends vertically through the entire diverter switch down.

Es ist eine obere waagerechte Lagerplatte 10 vorgesehen, deren Befestigung später noch näher erläutert werden wird. Auf der oberen Lagerplatte 10 ist ein Stator 11 montiert, der als Kraftspeicherträger wirkt, d. h. die nicht dargestellten Bauteile eines bekannten Kraftspeichers trägt. Dies sind ein von der Drehbewegung der Antriebswelle 9 spannbares Aufzugsteil, ein auslösbarer Abtriebsschlitten und eine durch diesen betätigbare Abtriebswelle zur Betätigung der ebenfalls nicht gezeigten Lastumschalterkontakte. Da solche Kraftspeicher in den verschiedensten Ausführungsformen für den Fachmann geläufig sind, wurden die genannten Einzelteile in der Zeichnung nicht dargestellt. Angedeutet ist lediglich ein Exzenter 12 auf der Antriebswelle 9, der auf bekannte Weise ein Aufzugsteil spannt. Die Antriebswelle 9 ist im Übrigen durch ein Lager 13 im Stator 11 und ein weiteres Lager 14 in der oberen Lagerplatte 10 geführt.It is an upper horizontal bearing plate 10 is provided, the attachment will be explained later in more detail. On the upper bearing plate 10, a stator 11 is mounted, which acts as a force storage carrier, that carries the components of a known force accumulator, not shown. These are a tensioned by the rotational movement of the drive shaft 9 elevator part, a releasable output carriage and an actuatable by this output shaft for actuating the also not shown Lastumschalterkontakte. Since such energy storage in a variety of embodiments are familiar to those skilled in the art, said items were not shown in the drawing. It is only indicated an eccentric 12 on the drive shaft 9, the on known manner spans an elevator part. Incidentally, the drive shaft 9 is guided by a bearing 13 in the stator 11 and a further bearing 14 in the upper bearing plate 10.

In einem bestimmten vertikalen Abstand ist unterhalb der oberen Lagerplatte 10 eine untere Lagerplatte 15 vorgesehen. Zwischen oberer Lagerplatte 10 und unterer Lagerplatte 15 befinden sich die nicht dargestellten eigentlichen Schaltkontakte des Lastumschalters, die nicht Gegenstand der vorliegenden Erfindung sind. Bei diesen Schaltkontakten kann es sich um mechanische Kontakte, Vakuumschaltzellen, Thyristoren oder auch eine Kombination unterschiedlicher Kontaktarten handeln. Diese werden, abhängig von der jeweils zugrundeliegenden Schaltung, in einer vorbestimmten Schaltsequenz nach Auslösung des Kraftspeichers betätigt.At a certain vertical distance, a lower bearing plate 15 is provided below the upper bearing plate 10. Between upper bearing plate 10 and lower bearing plate 15 are not shown actual switching contacts of the diverter switch, which are not the subject of the present invention. These switching contacts may be mechanical contacts, vacuum switching cells, thyristors or a combination of different types of contact. These are, depending on the underlying circuit, operated in a predetermined switching sequence after triggering the energy storage.

Dargestellt in der Figur 1 sind jedoch die Dauerhauptkontaktpaare, die sich, jeweils um 120 Grad gegeneinander versetzt, an der Innenseite des Ölgefäßes befinden. Für jede zu schaltende Phase ist dabei ein Dauerhauptkontaktpaar vorgesehen, von denen in der Schnittdarstellung allerdings nur zwei gezeigt sind. Jedes Dauerhauptkontaktpaar besteht aus einem oberen Dauerhauptkontaktträger 16 und unteren Dauerhauptkontaktträgern 17. Auf dem oberen Dauerhauptkontaktträger 16 sind jeweils obere Dauerhauptkontakt-Kontaktfinger 18 und auf jedem der beiden unteren Dauerhauptkontaktträger 17 untere Dauerhauptkontakt-Kontaktfinger 19 angeordnet. Die Beschaltung erfolgt jeweils mittels eines beweglichen Dauerhauptkontaktes 20, der sich nacheinander auf den unterschiedlichen Dauerhauptkontakt-Kontaktfingern abwälzt. Diese Dauerhauptkontaktpaare stellen im stationären Zustand die elektrische Verbindung zwischen der jeweils geschalteten Seite A oder B des Lastumschalters und der Lastableitung, üblicherweise den Sternpunkt, dar.Shown in the FIG. 1 However, the permanent main contact pairs, which are offset by 120 degrees from each other, are located on the inside of the oil vessel. For each phase to be switched while a permanent main contact pair is provided, of which, however, only two are shown in the sectional view. Each permanent main contact pair consists of an upper permanent main contact carrier 16 and lower permanent main contact carriers 17. Upper permanent main contact fingers 18 are disposed on the upper permanent main contact carrier 16 and lower permanent main contact fingers 19 are disposed on each of the two lower permanent main contact carriers. The wiring is in each case by means of a movable permanent main contact 20, which rolls in succession on the different permanent main contact fingers. These permanent main contact pairs represent in the stationary state, the electrical connection between the respective switched side A or B of the diverter switch and the load dissipation, usually the neutral point, is.

In Figur 1 ist der obere Anschlusskontakt 21 für die Lastableitung einer Phase gezeigt. Der Anschlusskontakt 21 steht elektrisch mit den oberen Dauerhauptkontakt-Kontaktfingern 18 in Verbindung. Darunter ist der Anschlusskontakt 22 für die Seite A des Lastumschalters dargestellt. Dieser steht elektrisch mit unteren Dauerhauptkontakt-Kontaktfingern 19 einer Seite in Verbindung. Der weitere Anschlusskontakt für die Seite B liegt in horizontaler Ebene dahinter und ist daher in der Schnittdarstellung nicht zu sehen.In FIG. 1 For example, the upper terminal 21 for the discharge of a phase is shown. The terminal 21 is electrically connected to the upper permanent main contact fingers 18. Below this, the connection contact 22 for the side A of the diverter switch is shown. This communicates electrically with lower permanent main contact fingers 19 of one side. The further connection contact for side B lies behind it in the horizontal plane and is therefore not visible in the sectional view.

Unterhalb der unteren Lagerplatte 15 befinden sich nicht dargestellte Überschaltwiderstände sowie nur angedeutete Varistoren 23; ihre Funktion ist allgemein bekannt.Below the lower bearing plate 15 are not shown overshoot resistors and only indicated varistors 23; their function is well known.

Am Ölgefäßboden 3 ist auf bekannt Weise ein Getriebe 24 vorgesehen, das mittels einer in eine Kupplung 25 einführbaren nicht dargestellten weiteren Antriebswelle den Wähler betätigt. An ihrem unteren Ende ist die Verlängerung der Antriebswelle 9 in einem Lager 26 im Ölgefäßboden 3 geführt. Der Vollständigkeit halber sei noch angemerkt, dass sich auch in der unteren Lagerplatte 15 noch ein Lager 27 zur Führung der Antriebswelle befindet.On the oil pan bottom 3, a gear 24 is provided in a known manner, which actuates the selector by means of an insertable into a clutch 25 further drive shaft. At its lower end, the extension of the drive shaft 9 is guided in a bearing 26 in the oil pan bottom 3. For the sake of completeness, it should be noted that a bearing 27 for guiding the drive shaft is also located in the lower bearing plate 15.

Jeder der bereits erläuterten oberen Dauerhauptkontaktträger 16 weist erfindungsgemäß einen oberen Zentrierbügel 28 mit einem nach oben gerichteten Arretierungsstift 29 auf. Jeder untere Dauerhauptkontaktträger 17 weist einen unteren Zentrierbügel 30 mit jeweils einem nach oberen gerichteten Zentrierstift 31 auf.Each of the already discussed upper permanent main contact carrier 16 according to the invention has an upper centering bracket 28 with an upwardly directed locking pin 29. Every lower one Permanent main contact carrier 17 has a lower centering bracket 30, each with an upwardly directed centering pin 31.

Jeder der Arretierungsstifte 29 korrespondiert erfindungsgemäß mit Arretierungsbohrungen 32 am Umfang der oberen Lagerplatte 10, und jeder der Zentrierstifte 31 korrespondiert mit Zentrieröffnungen 33 am Umfang der unteren Lagerplatte 15.Each of the locking pins 29 corresponds according to the invention with locking holes 32 on the circumference of the upper bearing plate 10, and each of the centering pins 31 corresponds with centering holes 33 on the circumference of the lower bearing plate 15th

Die Befestigung des Lastumschaltereinsatzes erfolgt dadurch, dass die obere Lagerplatte 10, an der alle Bauteile angeordnet sind, mit ihren Arretierungsbohrungen 32 in die jeweils korrespondierenden Arretierungsstifte 29 eingeführt wird. Die obere Lagerplatte 10 liegt, formschlüssig fixiert, auf den oberen Zentrierbügeln 28 auf und ist solcherart befestigt. Um das Einführen des Lastumschaltereinsatzes zu erleichtern und ein Verkanten zu vermeiden, erfolgt auf besonders vorteilhafte Weise eine zusätzliche Zentrierung durch die Zentrieröffnungen 33 am Umfang der unteren Lagerplatte 15, in die die korrespondierenden Zentrierstifte 31 eingeführt werden.The attachment of the diverter switch insert is effected in that the upper bearing plate 10, on which all components are arranged, is introduced with their locking bores 32 into the respectively corresponding locking pins 29. The upper bearing plate 10 is fixed in a form-fitting manner, on the upper Zentrierbügeln 28 and is fixed in such a way. In order to facilitate the insertion of the diverter switch insert and to prevent tilting, an additional centering by the centering openings 33 on the circumference of the lower bearing plate 15, in which the corresponding centering pins 31 are introduced takes place in a particularly advantageous manner.

Zusammengefasst erfolgt eine Fixierung des vollständigen Lastumschaltereinsatzes also dadurch, dass alle seine Bauteile an der oberen Lagerplatte 10 befestigt sind und diese obere Lagerplatte 10 durch die formschlüssige Verbindung ihrer Arretierungsbohrungen 32 in Arretierungsstifte 29 an festen Anschlusskontakten des Lastumschalters, hier am Anschlusskontakt 21 für die Lastableitung, fixiert sind. Zum Herausheben des vollständigen Lastumschaltereinsatzes sind am oberen Bereich des Kupplungsflansches 5 Aushebeösen 34 vorgesehen.In summary, a fixation of the complete diverter switch insert thus takes place in that all its components are fastened to the upper bearing plate 10 and this upper bearing plate 10 by the positive connection of their locking holes 32 in locking pins 29 on fixed terminals of the diverter switch, here at the connection terminal 21 for the load dissipation, are fixed. To lift out the complete diverter switch insert 5 Aushebeösen 34 are provided at the top of the coupling flange.

Claims (3)

  1. Load changeover switch for a tap changer, comprising a separate oil vessel (1), which surrounds it and provided in the wall of which and penetrating this are electrical connecting contacts (21, 22), which are circularly arranged in at least one horizontal plane for each electrical phase to be switched, for the load shunt on the one hand and each of the two sides A and B of the load changeover switch, between which there is switching over and the connection to the load shunt is produced, on the other hand, wherein a load changeover switch insert, which in turn comprises a force store, electrical switching means for load changeover switching, means for actuation of the electrical switching means and switchover resistances, is provided in the interior of the oil vessel (1), and wherein a horizontally extending upper mounting plate (10), which carries all components of the load changeover switch insert, is provided in the interior of the oil vessel (1), characterised in that the upper mounting plate (10) is fastened at its circumference in shape-locking and/or force-locking manner to those parts of the connecting contacts (21) which reach into the interior of the oil vessel (1), that the connecting contacts (21, 22) of each phase are connected in the interior of the oil vessel (1) with permanent main contact pairs, wherein each permanent main contact pair has upper and lower permanent main contact carriers (16, 17) for mounting upper and lower permanent main contact contacting fingers (18, 19), and that the upper mounting plate (10) is fastened to the respective permanent main contact carriers (16) of all phases, which are arranged circularly in a horizontal plane.
  2. Load changeover switch according to claim 1, characterised in that the upper permanent main contact carriers (16) each have an upper centring yoke (28) with an upwardly directed locking pin (29), and each of these locking pins (29) corresponds with a respective locking bore (32) at the circumference of the upper mounting plate (10) and that the upper mounting plate (10) rests in positionally fixed manner by the underside thereof on the upper centring yoke (28).
  3. Load changeover switch according to claim 2, characterised in that a lower mounting plate (15) is provided at a vertical spacing from the upper mounting plate (10), extends parallel thereto and is mechanically fixedly connected therewith, that the lower permanent main contact carriers (17) each comprise a lower centring yoke (30) with a respective upwardly directed centring pin (31) and that each of these centring pins (31) corresponds with a respective centring opening (33) at the circumference of the lower mounting plate (15) in such a manner that an additional fixing is effected.
EP01122903A 2000-11-09 2001-09-25 Load switch for a step switch Expired - Lifetime EP1205952B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10055406A DE10055406C1 (en) 2000-11-09 2000-11-09 Load switch for transformer stepping switch has parts of terminal contacts lying within oil-filled housing of load switch attached to periphery of upper mounting plate supporting load switching insert
DE10055406 2000-11-09

Publications (3)

Publication Number Publication Date
EP1205952A2 EP1205952A2 (en) 2002-05-15
EP1205952A3 EP1205952A3 (en) 2004-09-29
EP1205952B1 true EP1205952B1 (en) 2008-05-07

Family

ID=7662613

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01122903A Expired - Lifetime EP1205952B1 (en) 2000-11-09 2001-09-25 Load switch for a step switch

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EP (1) EP1205952B1 (en)
AT (1) ATE394784T1 (en)
DE (2) DE10055406C1 (en)
ES (1) ES2306686T3 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009035699A1 (en) * 2009-07-30 2011-02-10 Maschinenfabrik Reinhausen Gmbh Arrangement of a tap changer on a control transformer
DE202010017501U1 (en) 2010-05-11 2012-01-18 Maschinenfabrik Reinhausen Gmbh Diverter switch for a tap changer
DE202010016212U1 (en) * 2010-11-30 2012-03-01 Maschinenfabrik Reinhausen Gmbh diverter
DE102011113718A1 (en) * 2011-09-17 2013-03-21 Maschinenfabrik Reinhausen Gmbh OLTC
DE102013107552B4 (en) 2013-07-16 2017-03-16 Maschinenfabrik Reinhausen Gmbh OLTC
DE102013107547B4 (en) 2013-07-16 2017-01-19 Maschinenfabrik Reinhausen Gmbh On-load tap-changer, method for mounting a diverter switch insert in the on-load tap-changer and kerosene drain plug
DE102013107553B4 (en) 2013-07-16 2016-05-19 Maschinenfabrik Reinhausen Gmbh On-load tap-changer, transmission in the on-load tap-changer and method of emergency operation of a defined switching position in the on-load tap-changer
DE102013107549B4 (en) 2013-07-16 2017-11-30 Maschinenfabrik Reinhausen Gmbh Load selector for step transformers and carrier arm for a selection of load selector

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR901313A (en) * 1943-01-18 1945-07-24 Elin Und Schorch Werke Ag Fu R Device for fixing a power switch for step-controlled transformers
DE1638484C2 (en) * 1968-01-17 1975-11-20 Maschinenfabrik Reinhausen Gebrueder Scheubeck Kg, 8400 Regensburg Step switch for regulating transformers
DE2529381C3 (en) * 1975-07-02 1979-05-31 Maschinenfabrik Reinhausen Gebrueder Scheubeck Gmbh & Co Kg, 8400 Regensburg Step switch for step transformers with diverter switch housed in a cylindrical oil container
DE3627028A1 (en) * 1986-08-09 1988-02-11 Reinhausen Maschf Scheubeck STEP SWITCH FOR BELL BOILER INSTALLATION
DE3935289A1 (en) * 1989-10-24 1991-04-25 Reinhausen Maschf Scheubeck CYLINDRICAL LOAD SWITCH OF A STEP BY SWITCH OF STEP TRANSFORMERS

Also Published As

Publication number Publication date
ES2306686T3 (en) 2008-11-16
DE50113935D1 (en) 2008-06-19
DE10055406C1 (en) 2002-04-04
EP1205952A3 (en) 2004-09-29
EP1205952A2 (en) 2002-05-15
ATE394784T1 (en) 2008-05-15

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