EP2666172A1 - Tap changer - Google Patents

Tap changer

Info

Publication number
EP2666172A1
EP2666172A1 EP12700547.8A EP12700547A EP2666172A1 EP 2666172 A1 EP2666172 A1 EP 2666172A1 EP 12700547 A EP12700547 A EP 12700547A EP 2666172 A1 EP2666172 A1 EP 2666172A1
Authority
EP
European Patent Office
Prior art keywords
contact
switching
contact unit
carriers
pins
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.)
Granted
Application number
EP12700547.8A
Other languages
German (de)
French (fr)
Other versions
EP2666172B1 (en
Inventor
Christian Böger
Toni Hottner
Martin Jatta
Philipp Lederer
Sebastian Rehkopf
Klaus Schlepp
Rolf Strempel
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
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Maschinenfabrik Reinhausen GmbH, Maschinenfabrik Reinhausen Gebrueder Scheubeck GmbH and Co KG filed Critical Maschinenfabrik Reinhausen GmbH
Publication of EP2666172A1 publication Critical patent/EP2666172A1/en
Application granted granted Critical
Publication of EP2666172B1 publication Critical patent/EP2666172B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • H01H9/0016—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
    • H01H9/0044—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
    • H01H2009/0022—Mounting of the fixed contacts or taps on cylindrical wall of oil vessel containing the tap changer; Details of screening

Definitions

  • the present invention relates to a tap-changer for uninterruptible
  • On-load tap-changers have been used in transformers for many years to adjust the voltage, active and reactive power of electrical networks by changing the transmission ratio under load.
  • the setting of the gear ratio is done in stages;
  • the transformer is equipped with a tap winding whose taps are connected by the tap changer.
  • Insulating tape to be wrapped.
  • Shift shaft must be accessible.
  • this method of attachment has not been able to prevail by wrapping. This is partly due to the fact that with this type of attachment a relatively large amount of space around the switch column around must be present in order to wrap the insulating tape around them and possibly to be able to soak with resin. On the other hand, it is not in this attachment possible, without much effort, the contact carrier to be released from the shift shaft, during maintenance, for example. In this case, the Isolierstoffwicklung is inevitably destroyed and must be reapplied in each case.
  • a load selector or a tap selector for a tapped transformer which consists of a Isolierstoffzylinder, on the inside of fixed stepped contacts are arranged, as well as an arranged inside, rotatable by known drive means, switching shaft.
  • drive means, switching shaft At the shift shaft are one or more
  • Attached contact units each having at least one switching contact.
  • Each of the contact units is by a two-piece, flange
  • the shift shaft include a flange and braced by outside the shift shaft extending clamping means with each other. Furthermore, at least one centering aid is provided on the outer surface of the switching shaft, with the two-piece clamping ring
  • the switching shaft usually made of glass fiber reinforced plastic must be reworked in the known solution mandatory, especially turned off, which brings a significant time and cost.
  • this is absolutely necessary because the two-piece and flange-shaped clamping ring as a support surface requires a well-defined diameter of the shift shaft for a permanent and fixed fixation.
  • a rotation is used in DE 44 14 951 just inserted into a blind hole centering.
  • this proposed by the applicant solution has proven in practice impractical, since the centering pin is unsuitable to transmit forces, but at the same time exposed to high mechanical shear forces when turning the shift shaft. Overall, this results in a potential for improvement from a manufacturing and cost perspective.
  • Object of the present invention is therefore to provide a simple and inexpensive to manufacture contact unit, which also durable and stable with the
  • Switching shaft can be connected and still does not require the
  • Screw contact unit with the switching shaft This object is achieved by a tap changer with the features of the first claim.
  • the subclaims relate to particularly advantageous developments of the invention.
  • the general inventive idea consists in proposing a contact unit of a plurality of identically constructed contact carriers, which can be mounted to each other by simply plugging together to form a finished contact unit, wherein the individual contact carrier, each with a strap clamp to the shift shaft are fixable and further as anti-rotation on each contact carrier , on the shift shaft
  • At least two geometrically specially shaped pins are provided which can be brought into engagement with provided in the shift shaft blind holes in engagement, such that the entire contact unit is thus secured against rotation.
  • the finished contact unit consists of several identically constructed contact carrier, which only have to be plugged together in different directions, this saves the manufacturer enormous manufacturing effort and thus costs. Also accompanied by a simpler spare parts delivery for the manufacturer, since fewer items must be kept for the entire assembly. Instead of a two-piece, flange-like clamping ring to use multiple clamps, has proven to be the
  • FIG. 1 shows a contact unit according to the invention for a tap changer in a side view
  • FIG. 1 shows a contact unit 2 according to the invention constructed from a plurality of identical contact carriers 1 for a step switch not shown in detail, because it is known.
  • the individual contact carrier 1, and thus the entire contact unit 2, are by means of Clamp clamps 3 on one, for reasons of clarity, also not shown, shift shaft mountable.
  • the clamp clips 3 are designed such that they easily adapt to the geometric shape of the switching shaft, in particular permanently and stably adhere to the outer peripheral surface.
  • the respective ends of the clamp clips 3 are provided in provided on the contact carriers 1, having a through hole, blocks 4 and secured by means of fasteners 5, here, for example, with nuts, permanently secured against accidental removal.
  • the contact carriers 1 each have a receiving plate 7 provided with a plurality of bores 6 for switching means, not shown here.
  • the switching means may in particular also be known from the prior art
  • Roll contacts act, which are positioned between the individual mounting plates 7. For reasons of mechanical strength, the receiving plates 7 with
  • Strut sections 8 reinforced. On both side surfaces of the contact carrier 1 are each upwardly and downwardly directed and also in number alternating
  • Latches 9 attached each offset by a few 10ths of a mm, based on their height, are arranged. This is because in each case a bolt 10 can be hammered during assembly of the contact unit 2, which is slightly mechanically deformed by the displaced arrangement of the locking lugs 9 and thus secured against accidental falling out, which in the embodiments of Figures 2a and b will be explained in more detail.
  • Figures 2a and 2b show a single contact carrier 1 according to the invention in a bottom view and a top view.
  • the contact carrier 1 formed from electrically non-conductive material has on both sides, ie both the upper side and the lower side, a plurality of pins 11 and blind holes 12, which are positioned in such a way that
  • the pins 11 engage the respective top of a contact carrier 1 in the blind holes 12 of the corresponding bottom of another contact carrier 1 and vice versa. In this way, any number of contact carriers 1 to a contact unit 2 can be plugged together. Furthermore, the locking lugs 9 protrude so far beyond the lateral wall of the respective contact carrier 1, that during mating of two or a plurality of individual contact carriers 1 in the overlapping region then corresponding locking lugs 19, a bolt 10 can be beaten to hook, which is also apparent in Figure 1. Overall, then there are two or more
  • the contact carrier 1 On the opposite side of the receiving plate 7, the contact carrier 1 has a half-shell portion 13, on which also laterally the blocks 4 for receiving the
  • Clamp clamps 3 are attached. With this half shell 13, the respective contact carrier 1 is arranged on the switching shaft, not shown, a contact-fit. As a rotation and for permanent mechanical fixation, a plurality of geometrically specially shaped pins 14 are mounted on the inside of the half-shell 13, ie on the side facing the shift shaft, which are supported over a large area in provided on the shift shaft blind holes.

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)
  • Breakers (AREA)
  • Clamps And Clips (AREA)

Abstract

The invention relates to a tap changer for switching among different winding taps of a step transformer without interruption according to the preamble of the first patent claim. The general inventive concept lies in proposing a contact unit comprising several identically constructed contact carriers, which can assembled among each other by simple plugging to form a finished contact unit, wherein the individual contact carriers can each be fixed to the switching shaft by means of a bowed clamp and wherein furthermore at least two specially geometrically formed pins are provided as rotation-preventing elements on each contact carrier, on the side facing the switching shaft, which pins can be brought into engagement in the blind holes provided in the switching shaft in such a way that the entire contact unit is thus secured against rotation.

Description

Stufenschalter  step switch
Die vorliegende Erfindung betrifft einen Stufenschalter zur unterbrechungslosen The present invention relates to a tap-changer for uninterruptible
Umschaltung zwischen verschiedenen Wicklungsanzapfungen eines Stufentransformators gemäß dem Oberbegriff des ersten Patentanspruches. Switchover between different winding taps of a tapped transformer according to the preamble of the first claim.
Stufenschalter werden seit vielen Jahren in Transformatoren eingebaut, um durch Änderung des Übersetzungsverhältnisses unter Last die Spannung, Wirk- und Blindleistung von elektrischen Netzen einstellen zu können. On-load tap-changers have been used in transformers for many years to adjust the voltage, active and reactive power of electrical networks by changing the transmission ratio under load.
Bekannte Stufenschalter sind in zwei prinzipiellen Bauformen bekannt: Bei der einen Known tap changers are known in two basic designs: one
Bauform bestehen sie aus den getrennten Baugruppen Stufenwähler und Lastumschalter, bei der zweiten Bauform sind diese beiden Baugruppen zu einem Lastwähler vereinigt, der beide Funktionen ausführt. Der im nachfolgenden verwendete Begriff "Stufenschalter" soll beide vorgenannten Bauformen umfassen. They consist of the separate modules stage selector and diverter switch, in the second design, these two modules are combined to form a load selector, which performs both functions. The term "tap-changer" used below is intended to include both of the aforementioned types.
Die Einstellung des Übersetzungsverhältnisses erfolgt in Stufen; hierzu ist der Transformator mit einer Stufenwicklung ausgerüstet, deren Anzapfungen vom Stufenschalter beschaltbar sind. The setting of the gear ratio is done in stages; For this purpose, the transformer is equipped with a tap winding whose taps are connected by the tap changer.
Solche Lastwähler bzw. Stufenwähler sind aus der DE 38 27 385 hinreichend bekannt. Hierin wird eine Befestigung von Kontaktträgern an einer Schaltwelle beschrieben, die ohne Bohrungen in der Schaltwelle dadurch erfolgen soll, dass sowohl ein Flansch des Such load selector or tap changer are well known from DE 38 27 385. Herein, an attachment of contact carriers is described on a switching shaft, which is to take place without holes in the switching shaft in that both a flange of the
Kontaktträgers als auch die Schaltwelle mit einem harzgetränkten selbsthärtenden Contact carrier as well as the selector shaft with a resin-impregnated self-curing
Isolierstoffband umwickelt werden. Insulating tape to be wrapped.
Durch diese Umwickelung werden nicht nur wie ausgeführt, Bohrungen in der Schaltwelle, die aus elektrischen als auch aus Festigkeitsgründen unerwünscht sind, vermieden, sondern es ist auch nicht erforderlich, dass Befestigungsmittel, z. B. Muttern, im Inneren der Through this wrapping are not only as stated, holes in the switching shaft, which are undesirable for electrical as well as strength reasons, avoided, but it is also not necessary that fasteners, for. Nuts, inside the
Schaltwelle zugänglich sein müssen. Shift shaft must be accessible.
Trotzdem hat sich diese Befestigungsmethode durch Umwickeln nicht durchsetzen können. Dies liegt zum einen daran, dass bei dieser Art der Befestigung relativ viel Platz um die Schaltersäule herum vorhanden sein muss, um das Isolierstoffband um diese herum wickeln und ggf. noch mit Harz tränken zu können. Zum anderen ist es bei dieser Befestigung nicht möglich, ohne größeren Aufwand den Kontaktträger wieder von der Schaltwelle zu lösen, bei Wartungsarbeiten etwa. Hierbei wird die Isolierstoffwicklung zwangsläufig zerstört und muss jeweils erneut aufgebracht werden. Aus der DE 44 14 951 ist ein Lastwähler oder ein Stufenwähler für einen Stufentransformator bekannt, der aus einem Isolierstoffzylinder, an dessen Innenseite feste Stufenkontakte angeordnet sind, sowie einer im Inneren angeordneten, durch bekannte Antriebsmittel drehbaren, Schaltwelle besteht. An der Schaltwelle sind dabei ein oder mehrere Nevertheless, this method of attachment has not been able to prevail by wrapping. This is partly due to the fact that with this type of attachment a relatively large amount of space around the switch column around must be present in order to wrap the insulating tape around them and possibly to be able to soak with resin. On the other hand, it is not in this attachment possible, without much effort, the contact carrier to be released from the shift shaft, during maintenance, for example. In this case, the Isolierstoffwicklung is inevitably destroyed and must be reapplied in each case. From DE 44 14 951 a load selector or a tap selector for a tapped transformer is known, which consists of a Isolierstoffzylinder, on the inside of fixed stepped contacts are arranged, as well as an arranged inside, rotatable by known drive means, switching shaft. At the shift shaft are one or more
Kontakteinheiten befestigt, der bzw. die wiederum jeweils mindestens einen Schaltkontakt aufweisen. Jeder der Kontakteinheiten ist durch einen zweiteiligen, flanschartig Attached contact units, in turn, each having at least one switching contact. Each of the contact units is by a two-piece, flange
ausgebildeten Klemmring an der Schaltwelle befestigt, derart, dass die Kontakteinheit fest mit einem Teil des zweigeteilten Klemmrings verbunden ist und beide Teile des Klemmrings die Schaltwelle flanschartig umfassen und durch außerhalb der Schaltwelle verlaufende Spannmittel miteinander verspannt sind. Weiterhin ist an der Außenfläche der Schaltwelle mindestens eine Zentrierhilfe vorgesehen, die mit dem zweiteiligen Klemmring trained clamping ring attached to the shift shaft, such that the contact unit is fixedly connected to a part of the two-part clamping ring and both parts of the clamping ring, the shift shaft include a flange and braced by outside the shift shaft extending clamping means with each other. Furthermore, at least one centering aid is provided on the outer surface of the switching shaft, with the two-piece clamping ring
korrespondiert und eine eindeutige Lagezuordnung der Kontakteinheit und zugleich eine zusätzliche Verdrehsicherung gewährleistet. corresponds and ensures a clear position assignment of the contact unit and at the same time an additional rotation.
Die in der Regel aus glasfaserverstärktem Kunststoff hergestellte Schaltwelle muss bei der bekannten Lösung zwingend nachbearbeitet, insbesondere abgedreht, werden, was einen nicht unerheblichen Zeit- und Kostenaufwand mit sich bringt. Technisch ist dies deshalb zwingend erforderlich, weil der zweiteilig und flanschartig ausgebildete Klemmring als Auflagefläche einen genau definierten Durchmesser der Schaltwelle für eine dauerhalte und feste Fixierung benötigt. Als Verdrehsicherung dient in der DE 44 14 951 eben ein in eine Sackbohrung eingesteckter Zentrierstift. Diese von der Anmelderin vorgeschlagene Lösung hat sich jedoch in der Praxis als unpraktikabel erwiesen, da der Zentrierstift ungeeignet ist, Kräfte zu übertragen, gleichzeitig jedoch beim Drehen der Schaltwelle eben hohen mechanischen Scherkräften ausgesetzt ist. Insgesamt betrachtet ergibt sich damit ein Verbesserungspotential aus fertigungstechnischer sowie kostenseitiger Sichtweise. The switching shaft usually made of glass fiber reinforced plastic must be reworked in the known solution mandatory, especially turned off, which brings a significant time and cost. Technically, this is absolutely necessary because the two-piece and flange-shaped clamping ring as a support surface requires a well-defined diameter of the shift shaft for a permanent and fixed fixation. As a rotation is used in DE 44 14 951 just inserted into a blind hole centering. However, this proposed by the applicant solution has proven in practice impractical, since the centering pin is unsuitable to transmit forces, but at the same time exposed to high mechanical shear forces when turning the shift shaft. Overall, this results in a potential for improvement from a manufacturing and cost perspective.
Aufgabe der vorliegenden Erfindung ist es demnach, eine einfach und kostengünstig herzustellende Kontakteinheit anzugeben, die zudem dauerhaft und stabil mit der Object of the present invention is therefore to provide a simple and inexpensive to manufacture contact unit, which also durable and stable with the
Schaltwelle verbunden werden kann und es dennoch nicht erforderlich macht, die Switching shaft can be connected and still does not require the
Kontakteinheit mit der Schaltwelle zu verschrauben. Diese Aufgabe wird erfindungsgemäß durch einen Stufenschalter mit den Merkmalen des ersten Patentanspruches gelöst. Die Unteransprüche betreffen dabei besonders vorteilhafte Weiterbildungen der Erfindung. Die allgemeine erfinderische Idee besteht dabei darin, eine Kontakteinheit aus mehreren identisch aufgebauten Kontaktträgern vorzuschlagen, die untereinander durch einfaches Zusammenstecken zu einer fertigen Kontakteinheit montierbar sind, wobei die einzelnen Kontaktträger mit jeweils einer Bügelschelle an der Schaltwelle fixierbar sind und wobei weiterhin als Verdrehsicherung an jedem Kontaktträger, auf der der Schaltwelle Screw contact unit with the switching shaft. This object is achieved by a tap changer with the features of the first claim. The subclaims relate to particularly advantageous developments of the invention. The general inventive idea consists in proposing a contact unit of a plurality of identically constructed contact carriers, which can be mounted to each other by simply plugging together to form a finished contact unit, wherein the individual contact carrier, each with a strap clamp to the shift shaft are fixable and further as anti-rotation on each contact carrier , on the shift shaft
zugewandten Seite, mindestens zwei geometrisch speziell geformte Zapfen vorgesehen sind, die mit in der Schaltwelle vorgesehenen Sackbohrungen in Eingriff gebracht werden können, derart, dass die gesamte Kontakteinheit damit gegen Verdrehung gesichert ist. facing side, at least two geometrically specially shaped pins are provided which can be brought into engagement with provided in the shift shaft blind holes in engagement, such that the entire contact unit is thus secured against rotation.
Indem die fertige Kontakteinheit aus mehreren identisch aufgebauten Kontaktträger besteht, die nur in unterschiedlichen Richtungen zusammengesteckt werden müssen, erspart dies dem Hersteller enormen fertigungstechnischen Aufwand und damit Kosten. Ebenfalls einher geht damit eine für den Hersteller einfachere Ersatzteillieferung, da weniger Einzelteile für die gesamte Baugruppe vorgehalten werden müssen. Statt eines zweiteilig ausgebildeten, flanschartigen Klemmrings mehrere Bügelschellen zu verwenden, hat sich als die By the finished contact unit consists of several identically constructed contact carrier, which only have to be plugged together in different directions, this saves the manufacturer enormous manufacturing effort and thus costs. Also accompanied by a simpler spare parts delivery for the manufacturer, since fewer items must be kept for the entire assembly. Instead of a two-piece, flange-like clamping ring to use multiple clamps, has proven to be the
mechanisch dauerhaft beanspruchbarere Lösung erwiesen. Nicht zuletzt auch deshalb, weil mit den mehreren Bügelschellen eine größere mechanische Auflagefläche an der äußeren Umfangsfläche der Schaltwelle und damit ein größerer Kraftschluss geschaffen wird. mechanically durable claimable solution proved. Last but not least, because with the multiple clamps a larger mechanical bearing surface on the outer peripheral surface of the shift shaft and thus a greater adhesion is created.
Die Erfindung soll nachstehend an Hand von Figuren noch beispielhaft näher erläutert werden. The invention will be explained in more detail by way of example with reference to figures.
Es zeigen: Show it:
Figur 1 eine erfindungsgemäße Kontakteinheit für einen Stufenschalter in einer seitlichen Darstellung 1 shows a contact unit according to the invention for a tap changer in a side view
Figur 2a und 2b einen Kontaktträger einer erfindungsgemäßen Kontakteinheit in 2a and 2b, a contact carrier of a contact unit according to the invention in
unterschiedlichen Ansichten.  different views.
Figur 1 zeigt eine aus mehreren identischen Kontaktträgern 1 aufgebaute erfindungsgemäße Kontakteinheit 2 für einen nicht näher dargestellten, weil bekannten, Stufenschalter. Die einzelnen Kontaktträger 1 , und damit die gesamte Kontakteinheit 2, sind mittels Bügelschellen 3 an einer, aus Übersichtlichkeitsgründen ebenfalls nicht dargestellten, Schaltwelle montierbar. Die Bügelschellen 3 sind derart ausgebildet, dass sie sich an die geometrische Form der Schaltwelle einfach anpassen, insbesondere an deren äußeren Umfangsfläche dauerhaft und stabil anhaften. Die jeweiligen Enden der Bügelschellen 3 werden in an den Kontaktträgern 1 vorgesehenen, eine Durchgangsbohrung aufweisende, Klötzen 4 aufgenommen und mittels Befestigungsmitteln 5, hier beispielsweise mit Muttern, vor einem ungewollten Herausziehen dauerhaft gesichert. Damit entsteht, anders als beim bekannten Stand der Technik, keine punktuelle Auflagefläche an der Schaltwelle, sondern ein großflächiger mechanischer Kontaktschluss an beinahe dem gesamten äußeren Umfang der Schaltwelle unter Zuhilfenahme der mehreren Bügelschellen 3 und damit ein größerer Kraftschluss als bei der aus dem Stand der Technik bekannten Lösung. FIG. 1 shows a contact unit 2 according to the invention constructed from a plurality of identical contact carriers 1 for a step switch not shown in detail, because it is known. The individual contact carrier 1, and thus the entire contact unit 2, are by means of Clamp clamps 3 on one, for reasons of clarity, also not shown, shift shaft mountable. The clamp clips 3 are designed such that they easily adapt to the geometric shape of the switching shaft, in particular permanently and stably adhere to the outer peripheral surface. The respective ends of the clamp clips 3 are provided in provided on the contact carriers 1, having a through hole, blocks 4 and secured by means of fasteners 5, here, for example, with nuts, permanently secured against accidental removal. This creates, unlike the prior art, no punctual bearing surface on the shift shaft, but a large-scale mechanical contact closure on almost the entire outer circumference of the shift shaft with the aid of the plurality of clamps 3 and thus a greater adhesion than in the prior art known solution.
Zudem weisen die Kontaktträger 1 jeweils eine mit mehreren Bohrungen 6 versehene Aufnahmeplatte 7 für hier nicht näher dargestellte Schaltmittel auf. Bei den Schaltmitteln kann es sich dabei insbesondere um ebenfalls aus dem Stand der Technik bekannte In addition, the contact carriers 1 each have a receiving plate 7 provided with a plurality of bores 6 for switching means, not shown here. The switching means may in particular also be known from the prior art
Rollenkontakte handeln, die zwischen den einzelnen Aufnahmeplatten 7 positioniert werden. Aus Gründen der mechanischen Festigkeit sind die Aufnahmeplatten 7 mit  Roll contacts act, which are positioned between the individual mounting plates 7. For reasons of mechanical strength, the receiving plates 7 with
Strebenabschnitten 8 verstärkt. An beiden Seitenflächen der Kontaktträger 1 befinden sich jeweils nach oben und unten gerichtete und zudem in der Anzahl sich abwechselnde Strut sections 8 reinforced. On both side surfaces of the contact carrier 1 are each upwardly and downwardly directed and also in number alternating
Rastnasen 9 angebracht, die untereinander jeweils um wenige 10tel mm versetzt, bezogen auf ihre Höhe, angeordnet sind. Dies deshalb, weil damit bei der Montage der Kontakteinheit 2 jeweils ein Bolzen 10 eingeschlagen werden kann, der sich durch die versetze Anordnung der Rastnasen 9 leicht mechanisch verformt und damit vor einem ungewollten Herausfallen gesichert wird, was in den Ausführungen zu den Figuren 2a und b noch näher erläutert wird. Latches 9 attached, each offset by a few 10ths of a mm, based on their height, are arranged. This is because in each case a bolt 10 can be hammered during assembly of the contact unit 2, which is slightly mechanically deformed by the displaced arrangement of the locking lugs 9 and thus secured against accidental falling out, which in the embodiments of Figures 2a and b will be explained in more detail.
Die Figuren 2a und 2b zeigen einen einzelnen erfindungsgemäßen Kontaktträger 1 in einer Unteransicht und einer Oberansicht. Der aus elektrisch nicht leitendem Material gebildete Kontaktträger 1 weist auf beiden Seiten, also sowohl der Oberseite als auch der Unterseite, mehrere Stifte 11 und Sackbohrungen 12 auf, die derart positioniert sind, dass beim Figures 2a and 2b show a single contact carrier 1 according to the invention in a bottom view and a top view. The contact carrier 1 formed from electrically non-conductive material has on both sides, ie both the upper side and the lower side, a plurality of pins 11 and blind holes 12, which are positioned in such a way that
Zusammenstecken von zwei oder mehreren Kontaktträgern 1 , wie in Figur 1 ersichtlich, die Stifte 11 der jeweiligen Oberseite des einen Kontaktträgers 1 in die Sackbohrungen 12 der entsprechenden Unterseite eines weiteren Kontaktträgers 1 eingreifen und umgekehrt. Auf diese Art und Weise sind eine beliebige Anzahl von Kontaktträgern 1 zu einer Kontakteinheit 2 zusammensteckbar. Des Weiteren ragen die Rastnasen 9 derart weit über die seitliche Wandung des jeweiligen Kontaktträgers 1 , dass beim Zusammenstecken von zwei oder mehreren einzelnen Kontaktträgern 1 in den überlappenden Bereich dann entsprechend korrespondierender Rastnasen 19 ein Bolzen 10 zum verhaken geschlagen werden kann, was ebenfalls in Figur 1 ersichtlich ist. Insgesamt sind dann damit zwei oder mehr Mating of two or more contact carriers 1, as shown in Figure 1, the pins 11 engage the respective top of a contact carrier 1 in the blind holes 12 of the corresponding bottom of another contact carrier 1 and vice versa. In this way, any number of contact carriers 1 to a contact unit 2 can be plugged together. Furthermore, the locking lugs 9 protrude so far beyond the lateral wall of the respective contact carrier 1, that during mating of two or a plurality of individual contact carriers 1 in the overlapping region then corresponding locking lugs 19, a bolt 10 can be beaten to hook, which is also apparent in Figure 1. Overall, then there are two or more
Kontaktträger 1 mechanisch dauerhaft fixiert. Contact carrier 1 mechanically permanently fixed.
An dem der Aufnahmeplatte 7 gegenüberliegenden Bereich, weist der Kontaktträger 1 einen Halbschalenbereich 13 auf, an dem auch seitlich die Klötze 4 zur Aufnahme der On the opposite side of the receiving plate 7, the contact carrier 1 has a half-shell portion 13, on which also laterally the blocks 4 for receiving the
Bügelschellen 3 befestigt sind. Mit dieser Halbschale 13 wird der jeweilige Kontaktträger 1 an der nicht dargestellten Schaltwelle kontaktschlüssig angeordnet. Als Verdrehsicherung und zur dauerhaften mechanischen Fixierung sind an der Innenseite der Halbschale 13, also an der der Schaltwelle zugewandten Seite, mehrere geometrisch speziell geformte Zapfen 14 angebracht, die sich in an der Schaltwelle vorgesehene Sackbohrungen großflächig abstützen. Clamp clamps 3 are attached. With this half shell 13, the respective contact carrier 1 is arranged on the switching shaft, not shown, a contact-fit. As a rotation and for permanent mechanical fixation, a plurality of geometrically specially shaped pins 14 are mounted on the inside of the half-shell 13, ie on the side facing the shift shaft, which are supported over a large area in provided on the shift shaft blind holes.

Claims

Patentansprüche claims
1. Stufenschalter zur unterbrechungslosen Umschaltung zwischen verschiedenen Wicklungsanzapfungen eines Stufentransformators, 1. Step switch for uninterrupted switching between different winding taps of a tapped transformer,
aufweisend einen Isolierstoffzylinder, an dessen Innenseite feste, beschaltbare comprising an insulating cylinder, on the inside of which solid, beschaltbare
Stufenkontakte angeordnet sind, Step contacts are arranged,
sowie mindestens eine im Inneren angeordnete Schaltwelle, die durch Antriebsmittel drehbar ist und an der eine Kontakteinheit oder übereinander für mehrere Phasen mehrere and at least one shift shaft arranged in the interior, which is rotatable by drive means and on which a contact unit or on top of each other for a plurality of phases
Kontakteinheiten befestigbar sind, die wiederum mindestens einen Schaltkontakt aufweisen, mittels dem bzw. der die festen Stufenkontakte beschaltbar sind, wobei jede Kontakteinheit formschlüssig lagefixiert und durch ein außerhalb der Schaltwelle verlaufendes Contact units can be fastened, which in turn have at least one switching contact, by means of which or the fixed stage contacts can be connected, wherein each contact unit fixed in a form-locking manner and extending through an outside of the switching shaft
Befestigungsmittel an dieser befestigbar ist,  Fastener is attachable to this,
dadurch gekennzeichnet, characterized,
dass die Kontakteinheit (2) aus mehreren identisch aufgebauten Kontaktträgern (1) gebildet wird, the contact unit (2) is formed from a plurality of identically constructed contact carriers (1),
dass die einzelnen Kontaktträger (1) jeweils mit einer Bügelschelle (3) an der Schaltwelle fixierbar sind, the individual contact carriers (1) can each be fixed to the selector shaft with a strap clamp (3),
und dass die Kontaktträger (1), auf der Schaltwelle zugewandten Seite, mindestens zwei Zapfen (14) aufweisen, die sich in an der Schaltwelle vorgesehenen Sackbohrungen großflächig abstützen, derart, dass die gesamte Kontakteinheit (2) damit vor Verdrehung gesichert ist. and that the contact carrier (1), on the switching shaft side facing, at least two pins (14) which are supported in a large area in provided on the shift shaft blind holes, such that the entire contact unit (2) is thus secured against rotation.
2. Stufenschalter nach Anspruch 1 , 2. tap changer according to claim 1,
dadurch gekennzeichnet, characterized,
dass die einzelnen Kontaktträger (1) jeweils mehrere Stifte (11) und Sackbohrungen (12) aufweisen, die derart zueinander positioniert sind, dass die Stifte ( 1 ) der jeweiligen in that the individual contact carriers (1) each have a plurality of pins (11) and blind bores (12) which are positioned relative to one another such that the pins (1) of the respective ones
Oberseite des einen Kontaktträgers (1) mit den Sackbohrungen (12) der entsprechenden Unterseite eines weiteren Kontaktträgers (1) in Eingriff gebracht werden können. Top of a contact carrier (1) with the blind holes (12) of the corresponding bottom of another contact carrier (1) can be brought into engagement.
3. Stufenschalter nach Anspruch 1 oder 2, 3. tap changer according to claim 1 or 2,
dadurch gekennzeichnet, characterized,
dass die jeweiligen Enden der Bügelschellen (3) in an den Kontaktträgern (1) vorgesehenen Klötzen (4) aufgenommen und mittels Befestigungsmitteln (5) dauerhaft gesichert werden. the respective ends of the clamp clips (3) are received in blocks (4) provided on the contact carriers (1) and secured permanently by means of fastening means (5).
4. Stufenschalter nach einem der Ansprüche 1 bis 3, 4. Tap changer according to one of claims 1 to 3,
dadurch gekennzeichnet, characterized,
dass an beiden Seitenflächen eines jeden Kontaktträgers (1) nach oben und unten gerichtete Rastnasen (9) vorgesehen sind, die untereinander um wenige 10tel mm versetzt angeordnet sind. that on both side surfaces of each contact carrier (1) upwardly and downwardly directed locking lugs (9) are provided, which are arranged offset from one another by a few 10ths of a mm.
EP12700547.8A 2011-01-20 2012-01-04 Tap changer Active EP2666172B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011008964A DE102011008964B4 (en) 2011-01-20 2011-01-20 step switch
PCT/EP2012/000018 WO2012097959A1 (en) 2011-01-20 2012-01-04 Tap changer

Publications (2)

Publication Number Publication Date
EP2666172A1 true EP2666172A1 (en) 2013-11-27
EP2666172B1 EP2666172B1 (en) 2016-04-06

Family

ID=45507685

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12700547.8A Active EP2666172B1 (en) 2011-01-20 2012-01-04 Tap changer

Country Status (7)

Country Link
EP (1) EP2666172B1 (en)
CN (1) CN103314425B (en)
BR (1) BR112013016126B1 (en)
DE (1) DE102011008964B4 (en)
ES (1) ES2580958T3 (en)
UA (1) UA116523C2 (en)
WO (1) WO2012097959A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113192775B (en) * 2021-04-26 2022-11-18 国网河南省电力公司超高压公司 Contact assembly for on-load voltage regulating switch

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB356714A (en) * 1930-06-06 1931-09-07 British Electric Transformer C Improvements in or relating to voltage regulators for electrical transformers
DE3226854A1 (en) * 1982-07-17 1984-01-19 Maschinenfabrik Reinhausen Gebrüder Scheubeck GmbH & Co KG, 8400 Regensburg Load selector for tapped transformers having a tapped cylindrical winding which can be rotated in steps
DE3827385A1 (en) * 1988-08-12 1990-02-15 Reinhausen Maschf Scheubeck CYLINDRICAL LEVEL SELECTOR WITH CONTACT BRIDGE GUIDED BY A BRACKET OF INSULATING MATERIAL
DE9405427U1 (en) * 1994-03-30 1995-04-27 Maschinenfabrik Reinhausen Gmbh, 93059 Regensburg Load selector with switching resistors
ES2146673T3 (en) * 1994-04-28 2000-08-16 Reinhausen Maschf Scheubeck LOAD SELECTOR.
DE102007023124B3 (en) * 2007-05-16 2008-10-02 Maschinenfabrik Reinhausen Gmbh switching arrangement

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2012097959A1 *

Also Published As

Publication number Publication date
EP2666172B1 (en) 2016-04-06
UA116523C2 (en) 2018-04-10
DE102011008964A1 (en) 2012-07-26
WO2012097959A8 (en) 2013-08-01
CN103314425B (en) 2016-04-20
ES2580958T3 (en) 2016-08-30
CN103314425A (en) 2013-09-18
BR112013016126B1 (en) 2020-07-07
BR112013016126A2 (en) 2018-06-05
DE102011008964B4 (en) 2013-12-24
WO2012097959A1 (en) 2012-07-26

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