EP2845212B1 - Selector for a tap changer - Google Patents

Selector for a tap changer Download PDF

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Publication number
EP2845212B1
EP2845212B1 EP13719283.7A EP13719283A EP2845212B1 EP 2845212 B1 EP2845212 B1 EP 2845212B1 EP 13719283 A EP13719283 A EP 13719283A EP 2845212 B1 EP2845212 B1 EP 2845212B1
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EP
European Patent Office
Prior art keywords
selector
honeycomb segments
contact
contacts
preselector
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.)
Not-in-force
Application number
EP13719283.7A
Other languages
German (de)
French (fr)
Other versions
EP2845212A1 (en
Inventor
Christian Pircher
Max Weidinger
Thomas Schuster
Moritz BENGLER
Robert Hiltner
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 EP2845212A1 publication Critical patent/EP2845212A1/en
Application granted granted Critical
Publication of EP2845212B1 publication Critical patent/EP2845212B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • H01H9/0016—Contact arrangements for tap changers
    • 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
    • H01H9/0027—Operating mechanisms
    • 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
    • H01H9/0016—Contact arrangements for tap changers
    • H01H2009/0022—Mounting of the fixed contacts or taps on cylindrical wall of oil vessel containing the tap changer; Details of screening
    • 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
    • H01H2009/0088—Details of rotatable shafts common to more than one pole or switch unit

Definitions

  • the invention relates to a selector for a tap changer for uninterrupted switching between winding taps of a tapped transformer.
  • Tap changers have been known in the art for many years in numerous designs. They regularly have a selector and a diverter switch.
  • the selector is used for the powerless preselection of the new winding tap to be switched to below.
  • the diverter switch is used for the actual - fast - uninterrupted switching from the previous to the new, no-load preselected winding tap.
  • selector for tap changer will be from the DE19836463C1 known.
  • the tap changer has a switching shaft on which a plurality of actuating elements arranged parallel to one another are fastened.
  • the actuators are designed as cams with projections.
  • Parallel to the switching shaft mechanical switching elements are arranged, which are actuated via the projections of the cams.
  • the mechanical switching elements are connected between the selector and the vacuum interrupters of the diverter switch. By operating the mechanical switching elements, the vacuum interrupters are to be protected in the non-load current leading load branch from possibly occurring surge voltages.
  • a switching arrangement for a diverter is known.
  • This diverter which serves for voltage or currentless switching between winding taps, has two integrally formed, arranged in two levels one above the other fixing elements.
  • the fixing elements in the outer ring portion openings for the passage of contact bars.
  • each fixing element has a sleeve portion arranged in the middle, in which a switching shaft is mounted.
  • a step switch for transformers which consists of a selector and a load switch.
  • the selector is used for the power-less preselection of tap tap and the load switch for fast switching under voltage.
  • the selector includes two rotary contacts which connect the taps of the transformer with one slip ring each and are driven by a shaft.
  • the preselection is arranged constructively next to the actual fine selector (selector).
  • the structural implementation is carried out by means of cylinder segments or a framework of Isolierstoffstäben to which the movable and fixed preselector contacts are attached.
  • the prior art in such selectors for tap changers can therefore be summarized as follows:
  • the individual fixed selector contacts are arranged in a plurality of horizontal planes circular around a rotatable drive shaft around.
  • the arrangement of the selector contacts and their fixation is carried out either on individual rods of insulating material forming a cage stand, or in the wall of a Isolierstoffzylinders, or even in the wall of individual Isolierstoffzylindersegmenten, which also put together a circular arrangement.
  • the positioning of the fixed selector contacts is carried out vertically one above the other - in a Isolierstoffgerüst along the rods as support elements - in several levels.
  • Different divisions of tap changer, d. H. the number of possible winding taps to be connected and thus the number of fixed selector contacts are realized by the different number of individual insulating rods, the diameter of the insulating cylinder or the different number of horizontal planes.
  • control range is done via preselector which are designed as a coarse selector, Wender or a combination of both. These parts also consist of Isolierstoffzylindersegmenten or Isolierstoffstäben which are arranged next to the fine selector.
  • the prior art has various disadvantages overall.
  • the main disadvantage is that different design configurations of the selector are required for different numbers of connectable winding taps of the associated tapped transformer and thus different numbers of fixed voter contacts.
  • the diameter of the entire arrangement is greatly increased. It is also not possible to position these preselections below the fine selector in order to meaningfully use any available space.
  • tap changers can not be freely selected, whether a selection in the form of a coarse selector or a Wenders next to or below the fine selector (selector) is arranged.
  • the object of the invention is to eliminate these disadvantages and to provide a selector with an optional selection, which is modular and a reduction in complexity while covering the same variance, d.
  • the invention is based on the general idea, a generic voters of the modular form from always uniform, mutually offset next to each other and arranged honeycomb segments, is constructed.
  • the essential components for such a selector are honeycomb segments which are connected to one another via contacts, contact holders and bolts and are thereby surrounded by a shield.
  • the selector according to the invention offers numerous advantages. First of all, only a few different equal parts are required for its production. With these can be realized by the construction by means of the honeycomb segments with the same diameter different lengths and heights of the voter. In other words, the voter according to the invention is adaptable with low complexity to widely varying numbers of winding taps to be controlled and thus required fixed voter contacts.
  • Another advantage of the invention is that gaps remain in each horizontal plane between the connecting regions of the honeycomb segments and the contacts arranged there. Since the selector according to the invention, as usual, flows around and flows through the insulating oil in the transformer boiler, so that oil paths are realized both horizontally and vertically between all fixed selector contacts; This optimization of the insulation distances leads to a high dielectric strength with a compact design.
  • honeycomb segments also make it possible to arrange selection in the simplest manner either next to or below the fine selector and to connect them together. This allows more flexible response to given space.
  • the same parts can be used.
  • the fine selector can be halved in height compared to the prior art. Due to the honeycomb structure there are no direct rod sections between the planes, whereby the dielectric strength is increased.
  • FIG. 1 shows a honeycomb segment according to the invention 1.
  • the honeycomb segment 1 is preferably made of a thermoplastic having a high dielectric strength such as PPA.
  • the honeycomb segment 1 has four receiving areas 2 for contacts 3, contact holders 4 and bolts 5.
  • each receiving area 2 has at least one contact recess 3.1 for the contact 3, at least one contact holder recesses 4.1 for the contact holder 4 and at least one bore 5.1 for the bolt 5.
  • the contact holder 4 also have holes 4.2, which with the holes 5.1 of the honeycomb segments. 1 correspond.
  • FIG. 2 shows a honeycomb segment 1 are arranged at the contact holder 4 to the contacts 3 in the receiving areas 2.
  • the contact holder 4 can be pushed onto the contacts 4.
  • recesses, holes or other geometric structures on the contact can help to form a positive connection between contact 3 and contact holder 4 during encapsulation.
  • the contact holder 4 is preferably made of a thermoplastic having a high dielectric strength. The number and thickness of the contact holder 4 can be varied as needed.
  • the contacts 3 and attached to these contact holder 4 can be positioned in the receiving areas 2.
  • FIG. 3 shows five interconnected honeycomb segments 1, which form a ring with three levels for possible contacts 3.
  • the two upper contact levels are assigned to one phase and provide ten contacts 3 available.
  • the contact 3 When connecting the honeycomb segments 1, the contact 3 are first used with the contact holders 4 in the receiving areas 2. Thereafter, another honeycomb segment 1, with an empty receiving area 2, is inserted into the receiving area 2 of the first honeycomb segment 1 equipped with contacts 3 and contact holders 4. Since the bores 5.1 of both honeycomb segments 1 correspond to the bores 4.2 of the contact holders 4, all parts can be firmly connected to one another by means of the bolts 5. The bolts 5 are thereby led out and locked first through the holes 5.1 of the honeycomb segments 1, then through the contact holder 4 and finally through the holes 5.1 on the other side.
  • honeycomb segments 1 can be connected only with the aid of the bolt 5. This is advantageous when higher distances between the individual contacts 3 must be maintained at high voltages.
  • FIG. 4 a contact shield 6 is shown, with the help of which the dielectric strength can be additionally increased.
  • This contact shield is formed in two parts in this embodiment. During assembly, both parts are positioned one above the other and connected with the help of integrated snap hooks. Other joining methods are conceivable, ie glue, screw, etc.
  • an inventive selector 7 is shown in the assembled state. This is composed of a plurality of honeycomb segments 1, which at the receiving areas. 2 are composed. Clearly visible are the different levels of contact with the different contacts 3. With only a few parts can thus inventively and modular produce a complete selector 7. Inside the selector 7 is a switching column 8 with Ableitringen 9 and contact bridges with a drive train (not shown here) shown. In the upper part of the selector 7, interconnected honeycomb segments 1 without contacts 3 can be seen.
  • a selector 7 is shown, which is divided into fine selector 10 and 11 preselector.
  • the fine selector 10 and the preselector 11 are made of identical honeycomb segments 1, which are connected to each other in the same way.
  • An intermediate gear 12 separates the located inside the contact bridges and drive trains.
  • FIG. 7 a selector 7 is shown in the fine selector 10 and 11 preselector are arranged side by side. Again, uniform honeycomb segments 1 are always used for both units.
  • a voter can be built in almost any variety of variants from only a few different components.
  • assembling a contact 3 is not necessary to connect the honeycomb segments 1 with each other.
  • the honeycomb structure with its horizontal and vertical spaces allows a particularly good circulation of the surrounding insulating medium, usually insulating oil.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Housings And Mounting Of Transformers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Protection Of Transformers (AREA)
  • Coils Of Transformers For General Uses (AREA)

Description

Die Erfindung betrifft einen Wähler für einen Stufenschalter zur unterbrechungslosen Umschaltung zwischen Wicklungsanzapfungen eines Stufentransformators.The invention relates to a selector for a tap changer for uninterrupted switching between winding taps of a tapped transformer.

Stufenschalter sind seit vielen Jahren bekannter Stand der Technik in zahlreichen Bauformen. Sie weisen regelmäßig einen Wähler und einen Lastumschalter auf.Tap changers have been known in the art for many years in numerous designs. They regularly have a selector and a diverter switch.

Der Wähler dient zur leistungslosen Vorwahl der neuen Wicklungsanzapfung, auf die nachfolgend umgeschaltet werden soll.The selector is used for the powerless preselection of the new winding tap to be switched to below.

Der Lastumschalter dient zur eigentlichen - schnellen - unterbrechungslosen Umschaltung von der bisherigen auf die neue, lastlos vorgewählte Wicklungsanzapfung.The diverter switch is used for the actual - fast - uninterrupted switching from the previous to the new, no-load preselected winding tap.

Aus der Firmendruckschrift "OILTAP® M" der Anmelderin, Druckimpressum 03/09, ist ein Stufenschalter mit einem Wähler bekannt. Bei diesem Wähler sind feste Wählerkontakte kreisförmig in mehreren horizontalen Ebenen an einem Isolierstoffgerüst angeordnet. Diese festen Wählerkontakte sind durch eine im Inneren des Isolierstoffgerüstes zentrisch angeordnete Antriebswelle, die in jeder horizontalen Ebene der festen Wählerkontakte mindestens einen beweglichen Wählerkontakt trägt, beschaltbar. Die festen Wählerkontakte, die jeweils mit einer Wicklungsanzapfung des zugehörigen Stufentransformators, der geregelt werde soll, elektrisch in Verbindung stehen, sind hier also an senkrechten Isolierstoffstäben angeordnet und befestigt. Diese Isolierstoffstäbe können aus Hartpapier, GFK oder anderem isolierenden Werkstoff bestehen. Die Isolierstoffstäbe bilden ein Gerüst senkrechter, parallel zueinander angeordneter Stäbe; das Gerüst ist durch einen oberen sowie einen unteren Ring fixiert.From the company publication "OILTAP® M" Applicant, Druckimpressum 03/09, a tap changer with a selector is known. In this selector, fixed selector contacts are arranged in a circle in several horizontal planes on an insulating material stand. These fixed selector contacts can be connected by a drive shaft which is arranged centrally in the interior of the insulating material stand and which carries at least one movable selector contact in each horizontal plane of the fixed selector contacts. The fixed selector contacts, which are in each case electrically connected to a winding tapping of the associated tapped transformer which is to be regulated, are therefore arranged and fastened here on vertical insulating material rods. These Isolierstoffstäbe may consist of kraft paper, fiberglass or other insulating material. The Isolierstoffstäbe form a framework of vertical, mutually parallel rods; The framework is fixed by an upper and a lower ring.

Ein weiteres Beispiel von Wähler für Stufenschalter wird aus der DE19836463C1 bekannt.Another example of selector for tap changer will be from the DE19836463C1 known.

Aus der Firmendruckschrift "VACUTAP® W - Laststufenschalter für Regeltransformatoren", Druckimpressum 05/06 der Anmelderin ist ein weiterer Stufenschalter bekannt. Beim dort gezeigten Wähler sind die festen Wählerkontakte wiederum kreisförmig in mehreren horizontalen Ebenen angeordnet und von einer zentrischen Antriebswelle mit beweglichen Wählerkontakten beschaltbar, die Anordnung der festen Wählerkontakte ist aber dort in der Wandung eines geschlossenen Isolierstoffzylinders vorgesehen. Ein solcher Isolierstoffzylinder kann wiederum aus Hartpapier, GFK oder anderem isolierenden Material bestehen.From the company publication "VACUTAP® W - On-load tap-changer for control transformers", Druckimpressum 05/06 the applicant, a further tap changer is known. In the selector shown there, the fixed selector contacts are again arranged in a circle in several horizontal planes and can be connected by a central drive shaft with movable selector contacts, but the arrangement of the fixed selector contacts is provided there in the wall of a closed insulating cylinder. Such Isolierstoffzylinder may turn made of kraft paper, fiberglass or other insulating material.

Aus der weiteren Firmendruckschrift "VACUTAP® - Laststufenschalter für Ofenanwendungen", Druckimpressum 09/07 der Anmelderin ist u. a. ein Stufenschalter vom Typ VR® bekannt, bei dem der Wähler nicht aus einem geschlossenen Isolierstoffzylinder, sondern aus mehreren einzelnen Zylinderschalen besteht. Diese Zylinderschalen bilden einzelne Segmente, die im montierten Zustand de facto eine Zylinderkontur mit entsprechenden Zwischenräumen bilden.From the other company publication "VACUTAP® - On-load tap-changer for furnace applications", Druckimpressum 09/07 of the applicant u. a. a step switch type VR® known in which the selector is not made of a closed insulating cylinder, but of several individual cylinder shells. These cylindrical shells form individual segments, which in the assembled state de facto form a cylinder contour with corresponding gaps.

Aus der DE 10 2010 007 535 A1 ist ein Stufenschalter mit Freilaufelement bekannt. Der Stufenschalter weist eine Schaltwelle auf, an der mehrere parallel zu einander angeordnete Betätigungselemente befestigt sind. Die Betätigungselemente sind als Kurvenscheiben mit Vorsprüngen ausgebildet. Parallel zur Schaltwelle sind mechanische Schaltelemente angeordnet, welche über die Vorsprünge der Kurvenscheiben betätigt werden. Die mechanischen Schaltelemente sind zwischen dem Wähler und den Vakuumschaltröhren des Lastumschalters geschaltet. Durch Betätigung der mechanischen Schaltelemente sollen die Vakuumschaltröhren in dem nicht Laststrom führenden Lastzweig vor eventuell auftretenden Stoßspannungen geschützt werden.From the DE 10 2010 007 535 A1 is a tap changer with freewheel element known. The tap changer has a switching shaft on which a plurality of actuating elements arranged parallel to one another are fastened. The actuators are designed as cams with projections. Parallel to the switching shaft mechanical switching elements are arranged, which are actuated via the projections of the cams. The mechanical switching elements are connected between the selector and the vacuum interrupters of the diverter switch. By operating the mechanical switching elements, the vacuum interrupters are to be protected in the non-load current leading load branch from possibly occurring surge voltages.

Aus der DE 10 2010 020 137 A1 ist eine Schaltanordnung für einen Umsteller bekannt. Dieser Umsteller, der zum spannungs- bzw. stromlosen Umschaltung zwischen Wicklungsanzapfungen dient, weist zwei einstückig ausgebildete, in zwei Ebenen übereinander angeordnete Fixierelemente auf. Außerdem weisen die Fixierelemente im äußeren Ringabschnitt Öffnungen zur Durchführung von Kontaktstäben auf. Weiterhin weist jedes Fixierelement einen in der Mitte angeordneten Hülsenabschnitt auf, in dem eine Schaltwelle gelagert ist. Über eine Kontaktanordnung, die an der Schaltwelle befestigt ist, werden jeweils zwei Kontaktstäbe elektrisch leitend miteinander verbunden und damit bestimmte Wicklungsanzapfungen gewählt.From the DE 10 2010 020 137 A1 a switching arrangement for a diverter is known. This diverter, which serves for voltage or currentless switching between winding taps, has two integrally formed, arranged in two levels one above the other fixing elements. In addition, the fixing elements in the outer ring portion openings for the passage of contact bars. Furthermore, each fixing element has a sleeve portion arranged in the middle, in which a switching shaft is mounted. By way of a contact arrangement which is fastened to the selector shaft, in each case two contact rods are connected to one another in an electrically conductive manner and thus certain winding taps are selected.

Aus der US 3 798 395 A ist ein Stufenschalter für Transformatoren bekannt, der aus einem Wähler und einem Lastschalter besteht. Der Wähler dient dabei der leistungslosen Vorwahl der Stufenanzapfung und der Lastschalter der schnellen Umschaltung unter Spannung. Dabei umfasst der Wähler zwei Drehkontakte die die Anzapfungen des Transformators mit jeweils einem Schleifring verbinden und dabei über eine Welle angetrieben werden.From the US 3 798 395 A a step switch for transformers is known, which consists of a selector and a load switch. The selector is used for the power-less preselection of tap tap and the load switch for fast switching under voltage. The selector includes two rotary contacts which connect the taps of the transformer with one slip ring each and are driven by a shaft.

Aus der EP1105896B1 ist ein Stufenschalter mit einem Vorwähler zur unterbrechungslosen Umschaltung zwischen verschiedenen Wicklungsanzapfungen eines Stufentransformators bekannt. Vorwähler im Allgemeinen können einerseits als Grobstufenwähler, andererseits als Wender ausgebildet sein. In beiden Fällen wird durch diese Mittel der Regelbereich erweitert. Mit anderen Worten können vorhandene Wählerkontakte mehrfach verwendet werden. Der Grobstufenwähler setzt dies um, indem ein Teil der Stammwicklung zu- bzw. abgeschaltet wird. Durch den Wender ist es möglich, die Regelwicklungen zur Stammwicklung zu addieren oder aber auch gegen diese zu schalten, also zu subtrahieren. Auch eine Kombination aus Grobwähler und Wender ist möglich. Sobald ein Vorwähler verwendet wird, wird der eigentliche Wähler als Feinwähler bezeichnet. In allen drei Fällen wird der Vorwähler konstruktiv neben den eigentlichen Feinwähler (Wähler) angeordnet. Auch hier erfolgt die konstruktive Umsetzung mit Hilfe von Zylindersegmenten oder einem Gerüst aus Isolierstoffstäben an denen die beweglichen und festen Vorwählerkontakte befestigt sind.From the EP1105896B1 is a tap changer with a selection for uninterrupted switching between different winding taps of a tapped transformer known. Selection in general can on the one hand be designed as a coarse-step selector, on the other hand as a turner. In both cases, these means expand the control range. In other words, existing selector contacts can be used multiple times. The coarse-grained selector does this by switching part of the trunk winding on or off. By the turner it is possible to add the control windings to the main winding or to switch against them, so to subtract. A combination of coarse selector and turner is also possible. Once a selection is used, the actual selector is called a fine selector. In all three cases, the preselection is arranged constructively next to the actual fine selector (selector). Again, the structural implementation is carried out by means of cylinder segments or a framework of Isolierstoffstäben to which the movable and fixed preselector contacts are attached.

Der Stand der Technik bei derartigen Wählern für Stufenschalter lässt sich also wie folgt zusammenfassen: Die einzelnen festen Wählerkontakte sind in mehreren horizontalen Ebenen kreisförmig um eine drehbare Antriebswelle herum angeordnet. Die Anordnung der Wählerkontakte und ihre Fixierung erfolgt entweder an einzelnen Stäben aus Isoliermaterial, die ein Käfiggerüst bilden, oder in der Wandung eines Isolierstoffzylinders, oder auch in der Wandung von einzelnen Isolierstoffzylindersegmenten, die ebenfalls zusammengefügt eine kreisförmige Anordnung ergeben.The prior art in such selectors for tap changers can therefore be summarized as follows: The individual fixed selector contacts are arranged in a plurality of horizontal planes circular around a rotatable drive shaft around. The arrangement of the selector contacts and their fixation is carried out either on individual rods of insulating material forming a cage stand, or in the wall of a Isolierstoffzylinders, or even in the wall of individual Isolierstoffzylindersegmenten, which also put together a circular arrangement.

Wie erläutert erfolgt die Positionierung der festen Wählerkontakte vertikal übereinander - bei einem Isolierstoffgerüst entlang der Stäbe als Tragelemente - in mehreren Ebenen. Verschiedene Teiligkeiten des Stufenschalters, d. h. die Anzahl der möglichen zu beschaltenden Wicklungsanzapfungen und damit Zahl der festen Wählerkontakte, werden durch die unterschiedliche Zahl einzelner Isolierstoffstäbe, den Durchmesser des Isolierstoffzylinders bzw. die unterschiedliche Zahl horizontaler Ebenen realisiert.As explained, the positioning of the fixed selector contacts is carried out vertically one above the other - in a Isolierstoffgerüst along the rods as support elements - in several levels. Different divisions of tap changer, d. H. the number of possible winding taps to be connected and thus the number of fixed selector contacts are realized by the different number of individual insulating rods, the diameter of the insulating cylinder or the different number of horizontal planes.

Die Erweiterung des Regelbereiches erfolgt über Vorwähler die als Grobwähler, Wender oder eine Kombination aus beiden ausgebildet sind. Diese Teile bestehen ebenfalls aus Isolierstoffzylindersegmenten oder Isolierstoffstäben die neben dem Feinwähler angeordnet sind.The expansion of the control range is done via preselector which are designed as a coarse selector, Wender or a combination of both. These parts also consist of Isolierstoffzylindersegmenten or Isolierstoffstäben which are arranged next to the fine selector.

Der Stand der Technik weist insgesamt verschiedene Nachteile auf. Der Hauptnachteil besteht darin, dass für unterschiedliche Zahlen von beschaltbaren Wicklungsanzapfungen des zugeordneten Stufentransformators und damit unterschiedliche Zahlen fester Wählerkontakte auch unterschiedliche konstruktive Ausbildungen des Wählers erforderlich sind.The prior art has various disadvantages overall. The main disadvantage is that different design configurations of the selector are required for different numbers of connectable winding taps of the associated tapped transformer and thus different numbers of fixed voter contacts.

Aus Gründen der einzuhaltenden elektrischen Spannungsfestigkeit müssen die einzelnen festen Wählerkontakte einen gewissen Mindestabstand sowohl horizontal als auch vertikal zueinander aufweisen. Eine große Zahl fester Wählerkontakte in einer horizontalen Ebene führt damit zwangsläufig zu einem großen Durchmesser sowohl des Isolierstoffgerüstes als auch des Isolierstoffzylinders. Gleichermaßen führt eine große Zahl einzelner horizontaler Ebenen, die untereinander angeordnet sind, zu einer erhöhten Länge von Isolierstoffgerüst als auch Isolierstoffzylinder.For reasons to be met electrical voltage resistance, the individual fixed selector contacts must have a certain minimum distance both horizontally and vertically to each other. A large number of fixed wählerkontakte in a horizontal plane thus inevitably leads to a large diameter of both the Isolierstoffgerüstes and the insulating cylinder. Similarly, a large number of individual horizontal planes arranged one below the other results in an increased length of insulating framework as well as insulating cylinders.

Bei der Erweiterung des Feinwählers (Wählers) um einen Vorwähler, wie z.B. eines Wenders, wird der Durchmesser der gesamten Anordnung stark vergrößert. Es ist auch nicht möglich, diese Vorwähler unterhalb des Feinwählers zu positionieren um damit eventuell vorhandenen Bauraum sinnvoll zu nutzen.Upon extension of the selector (selector) by a selection, e.g. a Wenders, the diameter of the entire arrangement is greatly increased. It is also not possible to position these preselections below the fine selector in order to meaningfully use any available space.

Es müssen also bei einem Hersteller von Stufenschaltern sowohl Isolierstoffstäbe und die jeweiligen Fixierringe als auch unterschiedliche Isolierstoffzylinder in den verschiedensten Dimensionierungen vorgehalten werden; die Verwendung von Gleichteilen ist damit äußerst beschränkt. Insgesamt führt diese Komplexität zu hohen Kosten.So it must be maintained in a variety of sizes in a manufacturer of tap changers both Isolierstoffstäbe and the respective fixing rings and different insulating cylinder; the use of identical parts is thus extremely limited. Overall, this complexity leads to high costs.

Außerdem kann bei der Herstellung von Stufenschaltern nicht frei gewählt werden, ob ein Vorwähler in Form eines Grobwählers oder eines Wenders neben oder unterhalb des Feinwählers (Wähler) angeordnet wird.In addition, in the manufacture of tap changers can not be freely selected, whether a selection in the form of a coarse selector or a Wenders next to or below the fine selector (selector) is arranged.

Aufgabe der Erfindung ist es, diese Nachteile zu beseitigen und einen Wähler mit einem optionalen Vorwähler anzugeben, der modular aufgebaut ist und eine Reduzierung der Komplexität bei Abdeckung der gleichen Varianz, d. h. Bandbreite möglicher Zahlen von beschaltbaren Wicklungsanzapfungen, gestattet.The object of the invention is to eliminate these disadvantages and to provide a selector with an optional selection, which is modular and a reduction in complexity while covering the same variance, d. H. Bandwidth of possible numbers of connectable winding taps allowed.

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

Der Erfindung liegt die allgemeine Idee zugrunde, einen gattungsgemäßen Wähler der baukastenförmig aus stets einheitlich, zueinander versetzt neben- und untereinander angeordneten Wabensegmenten, aufgebaut ist. Erfindungsgemäß sind die wesentlichen Bauteile für einen solchen Wähler Wabensegmente, die über Kontakte, Kontakthalter und Bolzen miteinander verbunden sind und dabei von einer Abschirmung umgeben werden.The invention is based on the general idea, a generic voters of the modular form from always uniform, mutually offset next to each other and arranged honeycomb segments, is constructed. According to the invention, the essential components for such a selector are honeycomb segments which are connected to one another via contacts, contact holders and bolts and are thereby surrounded by a shield.

Der erfindungsgemäße Wähler bietet zahlreiche Vorteile. Zunächst einmal sind zu seiner Herstellung nur wenige unterschieliche Gleichteile erforderlich. Mit diesen lassen sich durch den Aufbau mittels der Wabensegmente bei gleichem Durchmesser unterschiedlichste Längen und Höhen des Wählers realisieren. Mit anderen Worten: der erfindungsgemäße Wähler ist bei geringer Komplexität an in weiten Grenzen unterschiedliche Zahlen von zu regelnden Wicklungsanzapfungen und damit erforderlichen festen Wählerkontakten anpassbar.The selector according to the invention offers numerous advantages. First of all, only a few different equal parts are required for its production. With these can be realized by the construction by means of the honeycomb segments with the same diameter different lengths and heights of the voter. In other words, the voter according to the invention is adaptable with low complexity to widely varying numbers of winding taps to be controlled and thus required fixed voter contacts.

Ein weiterer Vorteil der Erfindung besteht darin, dass in jeder horizontalen Ebene zwischen den Verbindungsbereichen der Wabensegmente und den dort angeordneten Kontakten Zwischenräume verbleiben. Da der erfindungsgemäße Wähler, wie üblich, vom Isolieröl im Trafokessel um- und durchströmt wird, sind damit Ölstrecken sowohl horizontal als auch vertikal zwischen allen festen Wählerkontakten realisiert; diese Optimierung der Isolationsstrecken führt zu einer hohen Spannungsfestigkeit bei kompaktem Aufbau.Another advantage of the invention is that gaps remain in each horizontal plane between the connecting regions of the honeycomb segments and the contacts arranged there. Since the selector according to the invention, as usual, flows around and flows through the insulating oil in the transformer boiler, so that oil paths are realized both horizontally and vertically between all fixed selector contacts; This optimization of the insulation distances leads to a high dielectric strength with a compact design.

Die Wabensegmente erlauben es außerdem, Vorwähler entweder neben oder unterhalb des Feinwählers auf einfachste Weise anzuordnen und miteinander zu verbinden. Dadurch kann flexibler auf vorgegebene Bauräume reagiert werden. Außerdem können dabei Gleichteile verwendet werden.The honeycomb segments also make it possible to arrange selection in the simplest manner either next to or below the fine selector and to connect them together. This allows more flexible response to given space. In addition, the same parts can be used.

Durch die versetzten Ebenen der Wählerkontakte kann der Feinwähler im Vergleich zum Stand der Technik in der Höhe halbiert werden. Durch die Wabenstruktur gibt es keine direkten Stabstrecken zwischen den Ebenen, wodurch die Spannungsfestigkeit erhöht wird.Due to the offset levels of the selector contacts, the fine selector can be halved in height compared to the prior art. Due to the honeycomb structure there are no direct rod sections between the planes, whereby the dielectric strength is increased.

Die Erfindung soll nachfolgend an Hand von Zeichnungen noch näher erläutert werden.The invention will be explained in more detail below with reference to drawings.

Es zeigen:

Figur 1
ein erfindungsgemäßes Wabensegment
Figur 2
ein erfindungsgemäßes Wabensegment mit Kontakten, Kontakthaltern und Bolzen
Figur 3
fünf miteinander verbundene Wabensegmente
Figur 4
ein Kontakt mit Kontaktabschirmung
Figur 5
ein erfindungsgemäßer Wähler
Figur 6
ein erfindungsgemäßer Wähler mit untereinander angeordnetem Feinwähler und Vorwähler
Figur 7
ein erfindungsgemäßer Wähler mit nebeneinander angeordnetem Feinwähler und Vorwähler
Show it:
FIG. 1
an inventive honeycomb segment
FIG. 2
an inventive honeycomb segment with contacts, contact holders and bolts
FIG. 3
five interconnected honeycomb segments
FIG. 4
a contact with contact shielding
FIG. 5
an inventive voter
FIG. 6
an inventive selector with one below the other fine selector and preselector
FIG. 7
an inventive voters with juxtaposed fine selector and selection

Figur 1 zeigt ein erfindungsgemäßes Wabensegment 1. Dieses besteht vorzugsweise aus einem Thermoplast mit einer hohen dielektrischen Festigkeit wie z.B. PPA. Das Wabensegment 1 weist vier Aufnahmebereiche 2 für Kontakte 3, Kontakthalter 4 und Bolzen 5 auf. Dabei hat jeder Aufnahmebereich 2 mindestens eine Kontaktaussparung 3.1 für den Kontakt 3, mindestens eine Kontakthalteraussparungen 4.1 für die Kontakthalter 4 sowie mindestens eine Bohrung 5.1 für die Bolzen 5. Zusätzlich weisen die Kontakthalter 4 ebenfalls Bohrungen 4.2 auf, die mit den Bohrungen 5.1 der Wabensegmente 1 korrespondieren. FIG. 1 shows a honeycomb segment according to the invention 1. This is preferably made of a thermoplastic having a high dielectric strength such as PPA. The honeycomb segment 1 has four receiving areas 2 for contacts 3, contact holders 4 and bolts 5. In this case, each receiving area 2 has at least one contact recess 3.1 for the contact 3, at least one contact holder recesses 4.1 for the contact holder 4 and at least one bore 5.1 for the bolt 5. In addition, the contact holder 4 also have holes 4.2, which with the holes 5.1 of the honeycomb segments. 1 correspond.

Figur 2 zeigt ein Wabensegment 1 bei dem Kontakthalter 4 um die Kontakte 3 in den Aufnahmebereichen 2 angeordnet sind. Die Kontakthalter 4 können auf die Kontakte 4 aufgeschoben werden. Außerdem ist es möglich die Kontakthalter 4 direkt mit dem Kontakt 3 mittels Spritzgussverfahren zu verbinden. Um eine Festsitz zu gewährleisten, können Aussparungen, Bohrungen oder andere geometrische Strukturen am Kontakt dazu beitragen, dass beim Umspritzen eine formschlüssige Verbindung zwischen Kontakt 3 und Kontakthalter 4 entsteht. Auch der Kontakthalter 4 besteht vorzugsweise aus einem Thermoplast mit einer hohen dielektrischen Festigkeit. Die Anzahl und Stärke der Kontakthalter 4 kann je nach Bedarf variiert werden. FIG. 2 shows a honeycomb segment 1 are arranged at the contact holder 4 to the contacts 3 in the receiving areas 2. The contact holder 4 can be pushed onto the contacts 4. In addition, it is possible to connect the contact holder 4 directly to the contact 3 by means of injection molding. In order to ensure a tight fit, recesses, holes or other geometric structures on the contact can help to form a positive connection between contact 3 and contact holder 4 during encapsulation. Also, the contact holder 4 is preferably made of a thermoplastic having a high dielectric strength. The number and thickness of the contact holder 4 can be varied as needed.

Durch die Kontaktaussparungen 3.1 und die Kontakthalteraussparungen 4.1 können die Kontakte 3 und die an diesen befestigte Kontakthalter 4 in den Aufnahmebereichen 2 positioniert werden.Through the contact recesses 3.1 and the contact holder recesses 4.1, the contacts 3 and attached to these contact holder 4 can be positioned in the receiving areas 2.

Figur 3 zeigt fünf miteinander verbundene Wabensegmente 1, die einen Ring mit drei Ebenen für mögliche Kontakte 3 bilden. Die beiden oberen Kontaktebenen sind einer Phase zugeteilt und stellen zehn Kontakte 3 zur Verfügung. Um die Menge der Kontakte 3 auf 12 oder 14 zu erhöhen, bedarf es nur einer leichten Änderung der Wabensegmente 1. Dadurch ist es möglich, bei gleichbleibendem Durchmesser eines Wählers 7 mehr Wabensegmente 1, d.h. bei zwölf Kontakten sechs Wabensegmente 1 und bei 14 Kontakten 3 sieben Wabensegmente 1, miteinander zu verbinden. FIG. 3 shows five interconnected honeycomb segments 1, which form a ring with three levels for possible contacts 3. The two upper contact levels are assigned to one phase and provide ten contacts 3 available. To increase the amount of the contacts 3 to 12 or 14, it requires only a slight change in the honeycomb segments 1. This makes it possible, with the same diameter of a selector 7 more honeycomb segments 1, ie at twelve contacts six honeycomb segments 1 and 14 contacts seven honeycomb segments 1, to connect with each other.

Beim Verbinden der Wabensegmente 1 werden zunächst die Kontakt 3 mit den Kontakthaltern 4 in die Aufnahmebereiche 2 eingesetzt. Danach wird ein weiteres Wabensegment 1, mit einem leeren Aufnahmebereich 2, in den mit Kontakten 3 und Kontakthaltern 4 bestückten Aufnahmebereich 2 des ersten Wabensegments 1 gesteckt. Da die Bohrungen 5.1 beider Wabensegmente 1 mit den Bohrungen 4.2 der Kontakthalter 4 korrespondieren, können alle Teile mit Hilfe der Bolzen 5 fest miteinander verbunden werden. Die Bolzen 5 werden dabei zunächst durch die Bohrungen 5.1 der Wabensegmente 1, danach durch die Kontakthalter 4 und schließlich wieder durch die Bohrungen 5.1 auf der anderen Seite herausgeführt und arretiert.When connecting the honeycomb segments 1, the contact 3 are first used with the contact holders 4 in the receiving areas 2. Thereafter, another honeycomb segment 1, with an empty receiving area 2, is inserted into the receiving area 2 of the first honeycomb segment 1 equipped with contacts 3 and contact holders 4. Since the bores 5.1 of both honeycomb segments 1 correspond to the bores 4.2 of the contact holders 4, all parts can be firmly connected to one another by means of the bolts 5. The bolts 5 are thereby led out and locked first through the holes 5.1 of the honeycomb segments 1, then through the contact holder 4 and finally through the holes 5.1 on the other side.

Die Verwendung eines Kontaktes 3 oder eines Kontakthalters 4 ist beim Zusammenbauen nicht zwingend erforderlich. So können Wabensegmente 1 lediglich unter Zuhilfenahme von der Bolzen 5 verbunden werden. Dies ist dann vorteilhaft, wenn bei hohen Spannungen höhere Abstände zwischen den einzelnen Kontakten 3 eingehalten werden müssen.The use of a contact 3 or a contact holder 4 is not mandatory when assembling. Thus honeycomb segments 1 can be connected only with the aid of the bolt 5. This is advantageous when higher distances between the individual contacts 3 must be maintained at high voltages.

Zusätzlich ist in Figur 3 zu sehen, dass die einzelnen Kontaktebenen zueinander versetzt sind. Dabei verlängert sich der dielektrische Abstand der einzelnen Kontakten 3, obwohl die Höhe des gesamten Wählers verkleinert wird.Additionally is in FIG. 3 to see that the individual contact levels are offset from each other. In this case, the dielectric distance of the individual contacts 3 is extended, although the height of the entire selector is reduced.

In Figur 4 ist eine Kontaktabschirmung 6 abgebildet, mit deren Hilfe die Spannungsfestigkeit zusätzlich erhöht werden kann. Diese Kontaktabschirmung ist in dieser Ausführungsform zweiteilig ausgebildet. Bei der Montage werden beide Teile übereinander positioniert und mit Hilfe von integrierten Schnapphaken miteinander verbunden. Auch andere Fügeverfahren sind denkbar, d.h. kleben, schrauben, etc.In FIG. 4 a contact shield 6 is shown, with the help of which the dielectric strength can be additionally increased. This contact shield is formed in two parts in this embodiment. During assembly, both parts are positioned one above the other and connected with the help of integrated snap hooks. Other joining methods are conceivable, ie glue, screw, etc.

In Figur 5 ist ein erfindungsgemäßer Wähler 7 in montiertem Zustand abgebildet. Dieser ist aus einer Vielzahl von Wabensegmenten 1 aufgebaut, die an den Aufnahmebereichen 2 zusammengesetzt sind. Deutlich erkennbar sind die unterschiedlichen Kontaktebenen mit den unterschiedlichen Kontakten 3. Mit nur wenigen Teilen lässt sich also erfindungsgemäß und modular ein vollständiger Wähler 7 herstellen. Im Inneren des Wählers 7 ist eine Schaltsäule 8 mit Ableitringen 9 sowie Kontaktbrücken mit einem Antriebsstrang (hier nicht dargestellt) abgebildet. Im oberen Bereich des Wählers 7 sind miteinander verbundene Wabensegmente 1 ohne Kontakte 3 zu erkennen.In FIG. 5 an inventive selector 7 is shown in the assembled state. This is composed of a plurality of honeycomb segments 1, which at the receiving areas. 2 are composed. Clearly visible are the different levels of contact with the different contacts 3. With only a few parts can thus inventively and modular produce a complete selector 7. Inside the selector 7 is a switching column 8 with Ableitringen 9 and contact bridges with a drive train (not shown here) shown. In the upper part of the selector 7, interconnected honeycomb segments 1 without contacts 3 can be seen.

In Figur 6 ist ein Wähler 7 abgebildet, der in Feinwähler 10 und Vorwähler 11 aufgeteilt ist. Wie man deutlich erkennen kann, sind der Feinwähler 10 und der Vorwähler 11 aus identischen Wabensegmenten 1, die auf die stets gleiche Art miteinander verbunden sind, aufgebaut. Ein Zwischengetriebe 12 trennt die sich im inneren befindenden Kontaktbrücken und Antriebsstränge.In FIG. 6 a selector 7 is shown, which is divided into fine selector 10 and 11 preselector. As can be clearly seen, the fine selector 10 and the preselector 11 are made of identical honeycomb segments 1, which are connected to each other in the same way. An intermediate gear 12 separates the located inside the contact bridges and drive trains.

In Figur 7 ist ein Wähler 7 abgebildet, bei dem Feinwähler 10 und Vorwähler 11 nebeneinander angeordnet sind. Auch hier werden stets einheitliche Wabensegmente 1 für beide Einheiten verwendet.In FIG. 7 a selector 7 is shown in the fine selector 10 and 11 preselector are arranged side by side. Again, uniform honeycomb segments 1 are always used for both units.

Insgesamt bietet die Erfindung zahlreiche Vorteile: Ein Wähler lässt sich in nahezu beliebiger Variantenvielfalt aus nur wenigen unterschiedlichen Bauteilen aufbauen. Beim Zusammenbauen ist ein Kontakt 3 nicht unbedingt notwendig um die Wabensegmente 1 untereinander zu verbinden. Die Wabenstruktur mit ihren horizontalen und vertikalen Zwischenräumen gestattet eine besonders gute Zirkulation des umgebenden Isoliermediums, in der Regel Isolieröls.Overall, the invention offers numerous advantages: A voter can be built in almost any variety of variants from only a few different components. When assembling a contact 3 is not necessary to connect the honeycomb segments 1 with each other. The honeycomb structure with its horizontal and vertical spaces allows a particularly good circulation of the surrounding insulating medium, usually insulating oil.

Durch die Form der Wabe gibt es keine direkten Stabstrecken, d.h. direkte Verbindungen, wie im Stand der Technik, zwischen den Kontaktebenen. Eine hohe Spannungsfestigkeit wird sichergestellt, obwohl die Bauhöhe des Feinwählers reduziert wird.Due to the shape of the honeycomb, there are no direct rod sections, i. direct connections, as in the prior art, between the contact planes. A high dielectric strength is ensured, although the height of the fine selector is reduced.

Bei Erweiterungen des Wählers um einen Grobstufenwähler oder Wender können stets identische Wabensegmente verwendet werden. Auch die freie Wahl der Anordnung des Vorwählers, nämlich unterhalb des Feinwählers oder daneben, bringt viele Vorteile mit sich. Durch das Versetzen der Wählerkontaktebenen einer Phase, kann die Höhe des Feinwählers um die Hälfte reduziert werden, wobei die dielektrische Festigkeit bestehen bleibt.When expanding the voter to a coarse-step selector or turner, identical honeycomb segments can always be used. The free choice of the arrangement of the preselector, namely below the fine selection or next, brings many advantages. By offsetting the selector contact levels of one phase, the height of the fine selector can be reduced by half, while maintaining dielectric strength.

Bei der Anordnung des Vorwählers unterhalb des Feinwählers, kann dieser gemeinsam mit dem Lastumschalter in den Transformatorkessel eingesetzt oder aus diesem heraus gehoben werden. Dies ist besonders bei der Montage und bei der Wartung vorteilhaft. Beim Zusammenbauen ist es nicht mehr notwendig zuerst den Wähler im Transformatorkessel einzubauen und erst später mit dem Lastumschalter zu verbinden. Beide Teile können so gleichzeitig installiert werden.When arranging the preselector below the fine selector, this can be used together with the diverter switch in the transformer tank or lifted out of this. This is particularly advantageous during assembly and maintenance. When assembling, it is no longer necessary to first install the selector in the transformer tank and connect it to the diverter switch later. Both parts can be installed simultaneously.

Claims (10)

  1. Selector for a tap changer for uninterrupted switching over between two winding taps of a tapped transformer,
    wherein fixed contacts are arranged circularly in several horizontal planes at a selector housing and
    wherein a centrally extending rotatable drive shaft is arranged in the interior of the selector housing and in each of the horizontal planes of the fixed contacts carries at least one movable contact for connection thereof,
    characterised in that
    the selector housing consists of a plurality of honeycomb segments (1),
    the honeycomb segments (1) are arranged adjacent to one another in the circle in a horizontal plane,
    a plurality of honeycomb segments (1) arranged in a plane in the circle are arranged vertically one above the other and
    the honeycomb segments (1) have mounting regions (2) and are so interconnectible by way of these mounting regions (2) that when at least two honeycomb segments (1) are connected a mechanically positive connection between at least two mounting regions (2) of the individual honeycomb segments (1) arises.
  2. Selector according to claim 1, characterised in that the mounting regions (2) have at least one bore (5.1) and that when two honeycomb segments (1) are connected at least one bolt (5) for fixing is inserted through the bores (5.1).
  3. Selector according to claim 2, characterised in that the mounting regions (2) have at least one contact holder cut-out (4.1), that a contact holder (4) with at least one bore (4.2), through which the bolt (5) is insertable, is selectably positioned in the contact holder cut-out (4.1) and that a fixed contact (3) can be arranged at the at least one contact holder (4).
  4. Selector according to claim 1 to 3, characterised in that the selector (7) comprises a fine selector (10) and a preselector (11).
  5. Selector according to claim 4, characterised in that the fine selector (10) and the preselector (11) are arranged vertically one above the other or horizontally adjacent to one another.
  6. Selector according to claim 4 or 5, characterised in that the preselector (11) is constructed as a reverser or coarse tap selector.
  7. Selector according to claim 4 to 6, characterised in that the fine selector (10) and the preselector (11) are separated from one another in the interior by an intermediate transmission (12).
  8. Selector according to claim 1 to 7, characterised in that the selector (7) comprises five, six or seven honeycomb segments (1) per phase.
  9. Selector according to claim 3 to 8, characterised in that a contact screen (6) is arranged around the contacts (3).
  10. Selector according to claim 1 to 9, characterised in that the honeycomb segment (1) consists of a thermoplastic such as, for example, PPA.
EP13719283.7A 2012-05-03 2013-04-19 Selector for a tap changer Not-in-force EP2845212B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012103855.4A DE102012103855B4 (en) 2012-05-03 2012-05-03 Selector for a tap changer
PCT/EP2013/058192 WO2013164211A1 (en) 2012-05-03 2013-04-19 Selector for a tap changer

Publications (2)

Publication Number Publication Date
EP2845212A1 EP2845212A1 (en) 2015-03-11
EP2845212B1 true EP2845212B1 (en) 2016-03-30

Family

ID=48224799

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13719283.7A Not-in-force EP2845212B1 (en) 2012-05-03 2013-04-19 Selector for a tap changer

Country Status (7)

Country Link
US (1) US9305719B2 (en)
EP (1) EP2845212B1 (en)
CN (1) CN104272415B (en)
DE (1) DE102012103855B4 (en)
HK (1) HK1204825A1 (en)
UA (1) UA114317C2 (en)
WO (1) WO2013164211A1 (en)

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE357279B (en) * 1971-11-02 1973-06-18 Asea Ab
US4532386A (en) * 1983-10-05 1985-07-30 Rte Corporation Dual voltage switch
DE19836463C1 (en) 1998-08-12 1999-10-21 Reinhausen Maschf Scheubeck Electric stepping switch for stepping transformer
CN2755750Y (en) * 2004-11-04 2006-02-01 江苏华鹏变压器有限公司 Non-cxcitation tap switch of transformer
CN1841583A (en) * 2005-03-28 2006-10-04 上海华明电力设备制造有限公司 Combined type on-load tap-changer
DE102007023124B3 (en) * 2007-05-16 2008-10-02 Maschinenfabrik Reinhausen Gmbh switching arrangement
US7649147B2 (en) * 2007-09-14 2010-01-19 Riming Xiao Off-circuit tap changer device
US8013263B2 (en) * 2008-08-14 2011-09-06 Cooper Technologies Company Multi-deck transformer switch
US8153916B2 (en) * 2008-08-14 2012-04-10 Cooper Technologies Company Tap changer switch
DE102010007535B4 (en) 2010-02-11 2017-12-21 Maschinenfabrik Reinhausen Gmbh Tap-changer with freewheeling element
DE102010020130A1 (en) * 2010-05-11 2011-11-17 Maschinenfabrik Reinhausen Gmbh Diverter switch for a tap changer
DE102010020137A1 (en) * 2010-05-11 2011-11-17 Maschinenfabrik Reinhausen Gmbh switching arrangement

Also Published As

Publication number Publication date
EP2845212A1 (en) 2015-03-11
US20150060244A1 (en) 2015-03-05
HK1204825A1 (en) 2015-12-04
CN104272415A (en) 2015-01-07
UA114317C2 (en) 2017-05-25
DE102012103855A1 (en) 2013-11-07
CN104272415B (en) 2016-09-07
DE102012103855B4 (en) 2016-01-07
WO2013164211A1 (en) 2013-11-07
US9305719B2 (en) 2016-04-05

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