EP2839493B1 - On-load tap changer - Google Patents

On-load tap changer Download PDF

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Publication number
EP2839493B1
EP2839493B1 EP13712755.1A EP13712755A EP2839493B1 EP 2839493 B1 EP2839493 B1 EP 2839493B1 EP 13712755 A EP13712755 A EP 13712755A EP 2839493 B1 EP2839493 B1 EP 2839493B1
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EP
European Patent Office
Prior art keywords
load tap
tap changer
selector
contact
contacts
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
EP13712755.1A
Other languages
German (de)
French (fr)
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EP2839493A1 (en
Inventor
Alfred Bieringer
Christian Hammer
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
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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 EP2839493A1 publication Critical patent/EP2839493A1/en
Application granted granted Critical
Publication of EP2839493B1 publication Critical patent/EP2839493B1/en
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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
    • H01H9/0011—Voltage selector switches
    • 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
    • H01H9/0038—Tap change devices making use of vacuum switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/0005—Tap change devices
    • H01H9/0044—Casings; Mountings; Disposition in transformer housing

Definitions

  • the present invention relates to an on-load tap changer for uninterrupted switching between different winding taps of a tapped transformer according to the preamble of the first claim.
  • On-load tap-changers have been in worldwide use for many years for uninterrupted switching between different winding taps of tapped transformers in large numbers. So-called reactor switches, which are particularly common in North America, have a switching reactance, which allows a slow, continuous switching.
  • On-load tap changers according to the resistance fast-switching principle usually consist of a selector for powerless selection of the respective winding tap of the tapped transformer to be switched to, and a diverter switch for the actual switching from the previous to the new, preselected winding tapping.
  • the diverter switch usually has switching contacts and resistance contacts.
  • the switch contacts are used for direct connection of the respective winding tap with the load dissipation, the resistor contacts for short-term wiring, d. H. Bridging by means of one or more switching resistors.
  • a diverter switch carries a drivable by a power storage drive shaft with at least one cam.
  • the cam has a plurality of control cams, wherein two arranged on the cam front control cams have a deviating from a circular contour contour on the type of cam on the contact one each connected via a rocker arm with a vacuum interrupter roller is performed, the profiled contour of the respective control cam taps.
  • tap changers are based on the principle of the resistance fast circuit for uninterrupted switching from one tapping of a tapped transformer to another constructed such that each solid step contacts electrically connected to the taps of the stepped windings are circularly arranged on one insulating skeleton or cylinders in one or more horizontal planes and by concentric drive shafts actuated rotatable contact bridges are connected.
  • load selectors in which the step selection and the actual load switching are combined, the actuation of the contact bridges takes place abruptly after triggering a wound up by the drive shaft of the switch energy storage, usually spring energy storage.
  • DE 42 37 165 C1 forms the basis for the preamble of claim 1 and, unlike these conventional constructions, describes a tap changer with linear contact actuation, wherein the fixed step contacts extend along a track into the interior of the switch and are connectable by a displaceable switching mechanism, in turn, of the Drive shaft is driven.
  • the vertically displaceable switching mechanism consists of a continuously driven by the drive shaft elevator carriage, which selects the new fixed stage contact, and a windable by the elevator carriage by means of an energy storage driven part, which jumps after triggering jump the elevator carriage and thereby the actual load switching of the previous tap Step winding on the selected new tap completes.
  • the required switching elements are part of the stripping section.
  • WO 2004 088 693 A1 describes a tap changer, which includes as a drive a torque motor that operates both the diverter switch and the fine selector directly.
  • Object of the present invention is therefore to provide an on-load tap-changer, which dispenses with the complex construction of a force accumulator and thus provides a significantly simplified structural design while increasing operational safety.
  • the general inventive idea is to operate both the selector contact unit, as well as the switching means for uninterrupted load switching by means of a common motor drive without the interposition of an energy storage.
  • the vacuum interrupters are arranged directly on a sliding carriage of the respective selector contact unit and the motor drive drives by means of a helical gear to a central threaded spindle, which is in operative connection with a plurality of slides, each slide has a spindle nut and the threaded spindle cooperates with the spindle nut of each slide and converting the rotary motion into a synchronous longitudinal displacement of the sliding carriages such that thereby both the movable selector contacts and the vacuum interrupters are operable.
  • the on-load tap-changer has a transmission module attached to the underside of the transformer cover, which is connected to the on the opposite outer side of the transformer cover arranged motor drive cooperates.
  • the gear module has for this purpose a flange-like sealing module, which is arranged directly on the underside of the transformer cover and releasably connected to the motor drive, in particular screwed, is.
  • the gear module On the transmission module, the entire diverter switch is also attached.
  • the gear module has both the task of holding the on-load tap-changer, as well as seal by means of the sealing module with respect to the outside of the transformer. Twists of the transformer cover during transport of the transformer are thus not transmitted to the on-load tap-changer.
  • a connection flange with overfilled sealing surface on the transformer cover can be dispensed with.
  • this type of proposed attachment provides a simple for the transformer manufacturer mounting the on-load tap-changer within the transformer tank.
  • the movable selector contacts are each received in a contact carrier and cooperate with arranged on a support plate fixed selector contacts, such that the individual fixed selector contacts by a longitudinal displacement of the movable selector contacts together with slide, so the selector contact unit, along the guide rod are connectable.
  • the selector contact unit By the back and forth movement of the selector contact unit, the individual fixed selector contacts are connected and thus go through the control range of the on-load tap-changer.
  • FIG. 1 is an inventive on-load tap-changer 1 is shown in a perspective view, which is arranged directly below a transformer cover, not shown, a stepped transformer, not shown.
  • a step transformer which is well known in the prior art, comprises a transformer tank filled with insulating oil, in which at least one winding is arranged on an iron yoke. This winding is divided into a master and a control winding, at the multiple winding taps are provided, which form the control area.
  • the on-load tap-changer 1 has a transmission module 2 fastened to the underside of the transformer cover, which cooperates with a motor drive 3 arranged on the opposite outer side of the transformer cover.
  • the motor drive 3 can be formed for example as a commercial stepper motor.
  • the transmission module 2 comprises a flange-like sealing module 4, which is arranged directly on the underside of the transformer cover and releasably connected to the motor drive 3, in particular screwed, is. At the transmission module 2 so that the entire on-load tap-changer 1 is fixed.
  • the gear module 2 fulfills both the task of holding the on-load tap-changer 1, as well as hermetically sealing by means of the sealing module 4 with respect to the outside of the transformer. Twists of the transformer cover during transport of the transformer are not transmitted to the on-load tap-changer 1.
  • the on-load tap-changer 1 provides vacuum interrupters 6.1 ... 6.6, with two vacuum interrupters 6.1 and 6.2, or 6.3 and 6.4, or 6.5 and 6.6 each associated with one phase of the on-load tap changer 1 and with a corresponding selector contact unit 7.1 ... 7.3 interact.
  • the vacuum interrupters 6.1 ... 6.6 are known from the prior art switching means with a movable switching contact 8.1 ...
  • Each voter contact unit 7.1 ... 7.3 each includes a plurality of connectable fixed selector contacts 10.1 ... 10.5, which are electrically connected to the winding taps of the control winding of the tapped transformer, a contact carrier 11.1 ... 11.3, each with two spring-mounted, movable selector contacts 12.1 and 12.2 and in each case two vacuum interrupters 6.1... 6.6, which are arranged directly on a corresponding sliding carriage 13.1... 13.3 of the respective selector contact unit 7.1.
  • middle positions in which a movable selector contact, for example, the movable selector contact 12.1, the first fixed selector contact, for example, the fixed selector contact 10.1, and the other movable selector contact, for example movable selector contact 12.2, the second fixed selector contact adjacent to the first fixed selector contact, for example, the fixed selector contact 10.2, connected, as a stationary operating position the on-load tap-changer 1 permissible.
  • a movable selector contact for example, the movable selector contact 12.1
  • the first fixed selector contact for example, the fixed selector contact 10.1
  • the other movable selector contact for example movable selector contact 12.2
  • the second fixed selector contact adjacent to the first fixed selector contact for example, the fixed selector contact 10.2
  • each voter contact unit 7.1, 7.2 and 7.3 is connected to a separate phase, ie winding, of the tapped transformer.
  • the contact carrier 11.1 ... 11.3 of each phase is mechanically fixed to a slide 13.1 ... 13.3 and forms together with this a structural unit.
  • the sliding carriage 13.1... 13.3 is received on a rail 14 and on a threaded spindle 15, which is arranged parallel to the rail 14, in such a way that the individual fixed selector contacts 10.1 ... 10.5 are displaced by a longitudinal displacement of the movable contacts 12.1 together sliding carriage 13.1 ... 13.3 along the rail 14 are connected.
  • the on-load tap changer 1 according to the invention, the switching means for uninterrupted switching, so the vacuum interrupters 6.1 ... 6.6, directly to the corresponding slide 13.1 .. 13.3 of the respective selector contact unit 7.1 ... 7.3 arranged and formed along this along the threaded spindle 15 movable ,
  • Each dial contact unit 7.1 ... 7.3 has its own, not visible in this illustration, spindle nut in the corresponding slide 13.1 ... 13. 3 arranged so that the selector contact units 7.1 ... 7.3 so along the threaded spindle 15 synchronously are formed displaceable.
  • the threaded spindle 15 is assembled from several sections and has between the corresponding sections each one of electrically insulating material molded coupling tube 17.1 ... 17.2.
  • an angle gear 18 is provided to pass the rotational movement of the motor drive 3 on the threaded spindle 15. Between the motor drive 3 and the angle gear 18, an insulating shaft 19 is disposed of dielectric material, which initiates the rotational movement of the motor drive 3 in the angle gear 18.
  • the fixed contacts of the arranged on the corresponding slide 13.1 ... 13.3 vacuum interrupters 6.1 ... 6.6 are each screwed by means of strands 20.1 ... 20.6 on the support plate 5 and electrically connected to not shown overshoot reactors or Kochschaltwideretcn. Overload reactors are designed according to the reactor switching principle and switching resistors according to the resistance switching principle.
  • 6.6 are with a rocker arm assembly 21.1 ... 21.6 in mechanical Operative connection, each having a roller 22.1 ... 22.6.
  • the movable switching contacts 8.1 ... 8.6 of the vacuum interrupters 6.1 ... 6.6 are electrically connected to the movable selector contacts 12.1 ... 12.2 of the associated phase.
  • the corresponding rollers 22.1 ... 22.6 roll in a longitudinal displacement of the sliding carriage 13.1 ... 13.3 on the profiling of a link rail 23.1 ... 23.3. along, so that so that the respective rocker arm assembly 21.1 ... 21.6 the corresponding movable switching contact 8.1 ... 8.6 of the associated vacuum interrupter 6.1 ...
  • the fixed selector contacts 10.1 ... 10.5, of which one sees in this illustration only the fixed selector contacts 10.3 ... 10.5, are here arranged directly on the support plate 5 and on the opposite side not shown here, the support plate 5 electrically to the corresponding winding taps of the control winding of the tapped transformer connected.
  • the on-load tap-changer 1 according to the invention can thus be used both according to the reactor switching principle and according to the resistance rapid-switching principle.
  • 9 stationary operating positions are allowed at fixed contactors 10.1 ... 10.5 shown here according to the reactor switching principle, while only 5 stationary operating positions are permitted in a constructed according to the resistance switching principle according to the invention on-load tap-changer.
  • the on-load tap-changer according to the invention can be used particularly advantageously on distribution transformers for voltage regulation of local networks.

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  • Housings And Mounting Of Transformers (AREA)
  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
  • Slide Switches (AREA)

Description

Die vorliegende Erfindung betrifft einen Laststufenschalter zur unterbrechungslosen Umschaltung zwischen verschiedenen Wicklungsanzapfungen eines Stufentransformators gemäß dem Oberbegriff des ersten Patentanspruches.The present invention relates to an on-load tap changer for uninterrupted switching between different winding taps of a tapped transformer according to the preamble of the first claim.

Laststufenschalter sind seit vielen Jahren zur unterbrechungslosen Umschaltung zwischen verschiedenen Wicklungsanzapfungen von Stufentransformatoren in großen Zahlen weltweit im Einsatz. Sogenannte Reaktorschalter, die besonders in Nord-Amerika verbreitet sind, besitzen eine Umschaltreaktanz, die eine langsame, kontinuierliche Umschaltung ermöglicht. Laststufenschalter nach dem Widerstandsschnellschalt-Prinzip bestehen üblicherweise aus einem Wähler zur leistungslosen Anwahl der jeweiligen Wicklungsanzapfung des Stufentransformators, auf die umgeschaltet werden soll, und einem Lastumschalter zur eigentlichen Umschaltung von der bisherigen auf die neue, vorgewählte Wicklungsanzapfung. Der Lastumschalter weist dazu üblicherweise Schaltkontakte und Widerstandskontakte auf. Die Schaltkontakte dienen dabei zur direkten Verbindung der jeweiligen Wicklungsanzapfung mit der Lastableitung, die Widerstandskontakte zur kurzzeitigen Beschaltung, d. h. Überbrückung mittels eines oder mehrerer Überschaltwiderstände. Die Entwicklungen der letzten Jahre führten jedoch weg von Lastumschaltern mit mechanischen Schaltkontakten im Isolieröl. Stattdessen werden vermehrt Vakuumschaltzellen als Schaltelemente eingesetzt.On-load tap-changers have been in worldwide use for many years for uninterrupted switching between different winding taps of tapped transformers in large numbers. So-called reactor switches, which are particularly common in North America, have a switching reactance, which allows a slow, continuous switching. On-load tap changers according to the resistance fast-switching principle usually consist of a selector for powerless selection of the respective winding tap of the tapped transformer to be switched to, and a diverter switch for the actual switching from the previous to the new, preselected winding tapping. The diverter switch usually has switching contacts and resistance contacts. The switch contacts are used for direct connection of the respective winding tap with the load dissipation, the resistor contacts for short-term wiring, d. H. Bridging by means of one or more switching resistors. The developments of recent years, however, led away from load switches with mechanical switching contacts in insulating oil. Instead, more and more vacuum switching cells are used as switching elements.

Ein derartiger Laststufenschalter mit Vakuumschaltröhren ist beispielsweise aus der DE 10 2009 043 171 A1 offenbart. Hier trägt ein Lastumschalter eine von einem Kraftspeicher antreibbare Antriebswelle mit mindestens einer Kurvenscheibe. Die Kurvenscheibe weist mehrere Steuerkurven auf, wobei zwei an der Kurvenscheibe stirnseitig angeordnete Steuerkurven eine von einer Kreisform abweichende Kontur nach Art von Nocken aufweisen, an der kontaktschlüssig jeweils eine über einen Kipphebel mit einer Vakuumschaltröhre verbundene Rolle geführt wird, die die profilierte Kontur der jeweiligen Steuerkurve abgreift.Such on-load tap changer with vacuum interrupters is for example from the DE 10 2009 043 171 A1 disclosed. Here, a diverter switch carries a drivable by a power storage drive shaft with at least one cam. The cam has a plurality of control cams, wherein two arranged on the cam front control cams have a deviating from a circular contour contour on the type of cam on the contact one each connected via a rocker arm with a vacuum interrupter roller is performed, the profiled contour of the respective control cam taps.

Bei einer besonderen Gattung von Laststufenschaltern, den so genannten Lastwählern, sind die beschriebenen Mittel zur Anwahl einer neuen Wicklungsanzapfung und die Mittel zur eigentlichen Lastumschaltung baulich vereinigt und werden gemeinsam betätigt. Üblicherweise sind Stufenschalter nach dem Prinzip der Widerstandsschnellschaltung zur unterbrechungslosen Umschaltung von einer Anzapfung eines Stufentransformators zu einer anderen so aufgebaut, dass die jeweils mit den Ausleitungen der Stufenwicklungen elektrisch in Verbindung stehenden festen Stufenkontakte in einer oder mehreren horizontalen Ebene bzw. Ebenen kreisförmig an einem Isolierstoffgerüst oder -zylinder angeordnet sind und durch von konzentrischen Antriebswellen betätigte drehbare Kontaktbrücken beschaltbar sind. Bei Lastwählern, bei denen die Stufenwahl und die eigentliche Lastumschaltung kombiniert sind, erfolgt die Betätigung der Kontaktbrücken dabei sprungartig nach Auslösung eines von der Antriebswelle des Schalters aufgezogenen Energiespeichers, meist Federkraftspeichers.In a special type of on-load tap-changers, the so-called load selectors, the described means for selecting a new winding tapping and the means for actual load switching are structurally combined and operated together. Usually, tap changers are based on the principle of the resistance fast circuit for uninterrupted switching from one tapping of a tapped transformer to another constructed such that each solid step contacts electrically connected to the taps of the stepped windings are circularly arranged on one insulating skeleton or cylinders in one or more horizontal planes and by concentric drive shafts actuated rotatable contact bridges are connected. In load selectors, in which the step selection and the actual load switching are combined, the actuation of the contact bridges takes place abruptly after triggering a wound up by the drive shaft of the switch energy storage, usually spring energy storage.

DE 42 37 165 C1 bildet die Basis für den Oberbegriff des Anspruchs 1 und beschreibt, abweichend von diesen üblichen Konstruktionen, einen Stufenschalter mit linearer Kontaktbetätigung, wobei die festen Stufenkontakte längs einer Bahn sich in das Innere des Schalters erstrecken und von einem verschiebbaren Schaltmechanismus beschaltbar sind, der wiederum von der Antriebswelle angetrieben wird. Der vertikal verschiebbare Schaltmechanismus besteht dabei aus einem kontinuierlich von der Antriebswelle antreibbaren Aufzugsschlitten, der den neuen festen Stufenkontakt vorwählt, und einem durch den Aufzugsschlitten mittels eines Energiespeichers aufziehbarem Abtriebsteil, das nach Auslösung sprungartig dem Aufzugsschlitten nachläuft und dabei die eigentliche Lastumschaltung von der bisherigen Anzapfung der Stufenwicklung auf die vorgewählte neue Anzapfung vollzieht. Die dazu erforderlichen Schaltelemente sind Bestandteil des Abtriebsteiles. DE 42 37 165 C1 forms the basis for the preamble of claim 1 and, unlike these conventional constructions, describes a tap changer with linear contact actuation, wherein the fixed step contacts extend along a track into the interior of the switch and are connectable by a displaceable switching mechanism, in turn, of the Drive shaft is driven. The vertically displaceable switching mechanism consists of a continuously driven by the drive shaft elevator carriage, which selects the new fixed stage contact, and a windable by the elevator carriage by means of an energy storage driven part, which jumps after triggering jump the elevator carriage and thereby the actual load switching of the previous tap Step winding on the selected new tap completes. The required switching elements are part of the stripping section.

Aus der DE 198 47 745 C1 ist ein weiterer, auf die Anmelderin zurückgehender, Laststufenschalter mit linear angeordneten Wählerkontakten bekannt geworden. Oberhalb der Wählerkontakte, also örtlich getrennt, befinden sich die den jeweiligen Wählerkontakten einer jeden Phase zugeordneten feststehenden Vakuumschaltröhren zur eigentlichen, sprungartigen Lastumschaltung. Zur Betätigung dieses Laststufenschalters ist ein Federenergiespeicher notwendig, der während seiner Aufzugsbewegung die Wählerkontakte betätigt, als auch die Vakuumschaltelemente durch seine sprungartige Abtriebsbewegung antreibt.From the DE 198 47 745 C1 is another, going back to the applicant, on-load tap-changer with linearly arranged selector contacts known. Above the selector contacts, so separated locally, are the respective voter contacts assigned to each phase fixed vacuum interrupters for the actual, sudden load switching. To operate this on-load tap changer, a spring energy store is necessary, which actuates the selector contacts during its elevator movement, and also drives the vacuum switching elements by its sudden output movement.

Unabhängig vom konstruktiven Aufbau des Laststufenschalters, also mit rotierendem oder linear bewegbarem Kontaktsystem, bedarf es bei aus dem Stand der Technik bekannten Laststufenschaltern eines Federenergiespeichers zum sprungartigen Umschalten mittels des Kontaktsystems. Aus dem Stand der Technik bekannte Kraftspeicher werden zu Beginn jeder Betätigung des Laststufenschalters von einer Antriebswelle aufgezogen, d. h. gespannt. Die bekannten Kraftspeicher bestehen im Wesentlichen aus einem Aufzugsschlitten und einem Sprungschlitten, zwischen denen Kraftspeicherfedern als Energiespeicher angeordnet sind. Derartige Kraftspeicher sind beispielsweise der DE 198 55 860 C1 sowie der DE 28 06 282 B1 entnehmbar.Regardless of the structural design of the on-load tap-changer, that is to say with a rotating or linearly movable contact system, in the case of prior-art on-load tap-changers of a spring energy store, it is necessary to switch suddenly by means of the contact system. From the prior art known energy storage are mounted at the beginning of each actuation of the on-load tap changer by a drive shaft, ie curious; excited. The known energy storage consist essentially of a lift carriage and a jump carriage, between which power storage springs are arranged as energy storage. Such energy storage are, for example, the DE 198 55 860 C1 as well as the DE 28 06 282 B1 removable.

Es wird eine anfängliche langsame Drehbewegung der Antriebswelle genutzt, um einen Aufzugsschlitten translatorisch aufzuziehen, um nachfolgend die wiederum translatorische Bewegung des Sprungschlittens in eine rotatorische Hauptbewegung der Abtriebswelle und in eine damit verbundene eigentliche Kontaktbetätigung zu überführen. Diese aufwändige Wandlung einer Drehbewegung in eine translatorische Bewegung und wieder zurück in eine Drehbewegung erfordert einen hohen Platzbedarf der Kraftspeicherkonstruktion innerhalb des Laststufenschalters und zudem eine Vielzahl komplexer einzelner Baugruppen.It is used an initial slow rotational movement of the drive shaft to translate a lift carriage to subsequently convert the turn translational movement of the jump carriage in a rotational main motion of the output shaft and in an associated actual contact actuation. This complex conversion of a rotary movement into a translational movement and back into a rotary motion requires a large space requirement of the force storage structure within the on-load tap-changer and also a large number of complex individual assemblies.

WO 2004 088 693 A1 beschreibt einen Stufenschalter, der als Antrieb einen Torque-Motor umfasst, der sowohl den Lastumschalter als auch den Feinwähler direkt betätigt. WO 2004 088 693 A1 describes a tap changer, which includes as a drive a torque motor that operates both the diverter switch and the fine selector directly.

Aufgabe der vorliegenden Erfindung ist es daher, einen Laststufenschalter anzugeben, der auf die aufwändige Konstruktion eines Kraftspeichers verzichtet und damit einen deutlich vereinfachten konstruktiven Aufbau bei gleichzeitig erhöhter Betriebssicherheit bietet.Object of the present invention is therefore to provide an on-load tap-changer, which dispenses with the complex construction of a force accumulator and thus provides a significantly simplified structural design while increasing operational safety.

Diese Aufgabe wird durch einen Laststufenschalter gemäß Anspruch 1 gelöst. Die Unteransprüche betreffen dabei besonders vorteilhafte Weiterbildungen der Erfindung.This object is achieved by an on-load tap changer according to claim 1. The subclaims relate to particularly advantageous developments of the invention.

Die allgemeine erfinderische Idee besteht darin, sowohl die Wählerkontakteinheit, als auch die Schaltmittel zur unterbrechungslosen Lastumschaltung mittels eines gemeinsamen Motorantriebes ohne Zwischenschaltung eines Energiespeichers zu betätigen.The general inventive idea is to operate both the selector contact unit, as well as the switching means for uninterrupted load switching by means of a common motor drive without the interposition of an energy storage.

Nach der Erfindung sind die Vakuumschaltröhren direkt an einem Gleitschlitten der jeweiligen Wählerkontakteinheit angeordnet und der Motorantrieb treibt mittels eines Winkelgetriebes eine zentrale Gewindespindel an, die mit mehreren Gleitschlitten in Wirkverbindung steht, wobei jeder Gleitschlitten eine Spindelmutter aufweist und die Gewindespindel mit der Spindelmutter eines jeden Gleitschlittens zusammenwirkt und die Drehbewegung in eine synchrone Längsverschiebung der Gleitschlitten umwandelt, derart, dass dadurch sowohl die beweglichen Wählerkontakte als auch die Vakuumschaltröhren betätigbar sind.According to the invention, the vacuum interrupters are arranged directly on a sliding carriage of the respective selector contact unit and the motor drive drives by means of a helical gear to a central threaded spindle, which is in operative connection with a plurality of slides, each slide has a spindle nut and the threaded spindle cooperates with the spindle nut of each slide and converting the rotary motion into a synchronous longitudinal displacement of the sliding carriages such that thereby both the movable selector contacts and the vacuum interrupters are operable.

Nach einer bevorzugten Ausführungsform der Erfindung weist der Laststufenschalter ein an der Unterseite des Transformatordeckels befestigtes Getriebemodul auf, das mit dem an der gegenüberliegenden Außenseite des Transformatordeckels angeordneten Motorantrieb zusammenwirkt. Das Getriebemodul weist hierfür ein flanschartiges Dichtmodul auf, das direkt an der Unterseite des Transformatordeckels angeordnet ist und mit dem Motorantrieb lösbar verbunden, insbesondere verschraubt, ist. An dem Getriebemodul ist zudem der gesamte Lastumschalter befestigt. Damit hat das Getriebemodul sowohl die Aufgabe, den Laststufenschalter zu halten, als auch mittels des Dichtmoduls gegenüber der Außenseite des Transformators abzudichten. Verwindungen des Transformatordeckels beim Transport des Trafos werden somit nicht an den Laststufenschalter übertragen. Zudem kann damit ein Anschlussflansch mit überfräster Dichtfläche am Transformatordeckel entfallen. Darüber hinaus bietet diese Art der vorgeschlagenen Befestigung eine für den Transformatorbauer einfache Montage des Laststufenschalters innerhalb des Transformatorkessels.According to a preferred embodiment of the invention, the on-load tap-changer has a transmission module attached to the underside of the transformer cover, which is connected to the on the opposite outer side of the transformer cover arranged motor drive cooperates. The gear module has for this purpose a flange-like sealing module, which is arranged directly on the underside of the transformer cover and releasably connected to the motor drive, in particular screwed, is. On the transmission module, the entire diverter switch is also attached. Thus, the gear module has both the task of holding the on-load tap-changer, as well as seal by means of the sealing module with respect to the outside of the transformer. Twists of the transformer cover during transport of the transformer are thus not transmitted to the on-load tap-changer. In addition, a connection flange with overfilled sealing surface on the transformer cover can be dispensed with. In addition, this type of proposed attachment provides a simple for the transformer manufacturer mounting the on-load tap-changer within the transformer tank.

Nach einer wiederum weiteren Ausführungsform der Erfindung werden die beweglichen Wählerkontakte jeweils in einem Kontaktträger aufgenommen und wirken mit an einer Trägerplatte angeordneten festen Wählerkontakten zusammen, derart, dass die einzelnen festen Wählerkontakte durch eine Längsverschiebung der beweglichen Wählerkontakte samt Gleitschlitten, also der Wählerkontakteinheit, entlang der Führungsstange beschaltbar sind. Durch die Hin- und/oder Herbewegung der Wählerkontakteinheit werden die einzelnen festen Wählerkontakte beschaltet und damit der Regelbereich des Laststufenschalters durchlaufen.According to yet another embodiment of the invention, the movable selector contacts are each received in a contact carrier and cooperate with arranged on a support plate fixed selector contacts, such that the individual fixed selector contacts by a longitudinal displacement of the movable selector contacts together with slide, so the selector contact unit, along the guide rod are connectable. By the back and forth movement of the selector contact unit, the individual fixed selector contacts are connected and thus go through the control range of the on-load tap-changer.

Nachfolgend sind die Erfindung und ihre Vorteile unter Bezugnahme auf die beigefügten Zeichnungen ausführlicher beschrieben. Es zeigen:

FIG. 1
eine seitliche Perspektivansicht einer weiteren Ausführungsform eines erfindungsgemäßen Laststufenschalters;
FIG. 2
eine Detailansicht der seitlichen Perspektivansicht nach FIG. 6a.
In the following, the invention and its advantages will be described in more detail with reference to the accompanying drawings. Show it:
FIG. 1
a side perspective view of another embodiment of an on-load tap changer according to the invention;
FIG. 2
a detailed view of the side perspective view of FIG. 6a.

In FIG. 1 ist ein erfindungsgemäßer Laststufenschalter 1 in einer Perspektivansicht gezeigt, der direkt unterhalb eines nicht gezeigten Transformatordeckels eines ebenfalls nicht näher dargestellten Stufentransformators angeordnet ist. Eine genauere Beschreibung der Bauteile des Laststufenschalters 1 und deren Funktion ist der unten stehenden Beschreibung entnehmbar. Ein derartiger Stufentransformator, der aus dem Stand der Technik hinreichend bekannt ist, umfasst einen mit Isolieröl befüllten Transformatorkessel, in dem an einem Eisenjoch wenigstens eine Wicklung angeordnet ist. Diese Wicklung unterteilt sich in eine Stamm- und eine Regelwicklung, an der mehrere Wicklungsanzapfungen vorgesehen sind, die den Regelbereich bilden. Zudem weist der Laststufenschalter 1 ein an der Unterseite des Transformatordeckels befestigtes Getriebemodul 2 auf, das mit einem an der gegenüberliegenden Außenseite des Transformatordeckels angeordneten Motorantrieb 3 zusammenwirkt. Der Motorantrieb 3 kann dabei beispielsweise als handelsüblicher Schrittmotor ausgebildet sein. Das Getriebemodul 2 umfasst ein flanschartiges Dichtmodul 4, das direkt an der Unterseite des Transformatordeckels angeordnet ist und mit dem Motorantrieb 3 lösbar verbunden, insbesondere verschraubt, ist. An dem Getriebemodul 2 ist damit der gesamte Laststufenschalter 1 gefestigt. Das Getriebemodul 2 erfüllt sowohl die Aufgabe, den Laststufenschalter 1 zu halten, als auch mittels des Dichtmoduls 4 gegenüber der Außenseite des Transformators hermetisch abzudichten. Verwindungen des Transformatordeckels beim Transport des Transformators werden dadurch nicht an den Laststufenschalter 1 übertragen.In FIG. 1 is an inventive on-load tap-changer 1 is shown in a perspective view, which is arranged directly below a transformer cover, not shown, a stepped transformer, not shown. A more detailed description of the components of the on-load tap-changer 1 and its function can be taken from the description below. Such a step transformer, which is well known in the prior art, comprises a transformer tank filled with insulating oil, in which at least one winding is arranged on an iron yoke. This winding is divided into a master and a control winding, at the multiple winding taps are provided, which form the control area. In addition, the on-load tap-changer 1 has a transmission module 2 fastened to the underside of the transformer cover, which cooperates with a motor drive 3 arranged on the opposite outer side of the transformer cover. The motor drive 3 can be formed for example as a commercial stepper motor. The transmission module 2 comprises a flange-like sealing module 4, which is arranged directly on the underside of the transformer cover and releasably connected to the motor drive 3, in particular screwed, is. At the transmission module 2 so that the entire on-load tap-changer 1 is fixed. The gear module 2 fulfills both the task of holding the on-load tap-changer 1, as well as hermetically sealing by means of the sealing module 4 with respect to the outside of the transformer. Twists of the transformer cover during transport of the transformer are not transmitted to the on-load tap-changer 1.

Mit dem Getriebemodul 2 mechanisch verbunden ist eine Trägerplatte 5 aus dielektrischem Material, an der die einzelnen Baugruppen des Laststufenschalter 1 befestigbar sind. Die Trägerplatte 5 ist dabei aus elektrisch isolierendem Material gefertigt und dazu ausgebildet, alle wesentlichen Bauteile des Laststufenschalters 1 aufzunehmen. Als Schaltmitteln zur unterbrechungslosen Umschaltung sieht der erfindungsgemäße Laststufenschalter 1 Vakuumschaltröhren 6.1 ... 6.6 vor, wobei jeweils zwei Vakuumschaltröhren 6.1 und 6.2, bzw. 6.3 und 6.4, bzw. 6.5 und 6.6 jeweils einer Phase des Laststufenschalters 1 zugeordnet sind und mit einer entsprechenden Wählerkontakteinheit 7.1 ... 7.3 zusammenwirken. Bei den Vakuumschaltröhren 6.1 ... 6.6 handelt es sich um aus dem Stand der Technik bekannte Schaltmittel mit einem beweglichen Schaltkontakt 8.1 ... 8.6 sowie einem nicht näher dargestellten Festkontakt. Eine jede Wählerkontakteinheit 7.1 ... 7.3 umfasst jeweils mehrere beschaltbare feste Wählerkontakte 10.1 ... 10.5, die elektrisch mit den Wicklungsanzapfungen der Regelwicklung des Stufentransformators verbunden sind, einen Kontaktträger 11.1 ... 11.3 mit jeweils zwei federnd gelagerten, beweglichen Wählerkontakten 12.1 und 12.2 sowie jeweils zwei Vakuumschaltröhren 6.1 ... 6.6, die direkt an einem entsprechenden Gleitschlitten 13.1 ... 13.3 der jeweiligen Wählerkontakteinheit 7.1 ... 7.3 angeordnet sind. Abhängig vom Umschaltprinzip, also nach dem Reaktor- oder Widerstandsschnellschalt-Prinzip, sind dabei Mittelstellungen, in denen der eine bewegliche Wählerkontakt, beispielsweise der bewegliche Wählerkontakt 12.1, den ersten festen Wählerkontakt, beispielweise den festen Wählerkontakt 10.1, und der andere bewegliche Wählerkontakt, beispielsweise der bewegliche Wählerkontakt 12.2, den zum ersten festen Wählerkontakt benachbarten zweiten festen Wählerkontakt, beispielsweise den festen Wählerkontakt 10.2, beschaltet, als stationäre Betriebsstellung des Laststufenschalters 1 zulässig. Damit sind nach dem Rekatorschaltprinzip bei hier 5 dargestellten festen Wählerkontakten 8.1 ... 8.5 neun stationäre Betriebsstellungen möglich, während es bei einem Laststufenschalter 1 nach dem Widerstandschnellschalt-Prinzip, bei dem keine Mittelstellungen zulässig sind, nur 5 stationäre Betriebsstellungen gibt.Mechanically connected to the transmission module 2 is a carrier plate 5 of dielectric material to which the individual components of the on-load tap-changer 1 can be fastened. The support plate 5 is made of electrically insulating material and adapted to receive all the essential components of the on-load tap-changer 1. As switching means for uninterrupted switching, the on-load tap-changer 1 according to the invention provides vacuum interrupters 6.1 ... 6.6, with two vacuum interrupters 6.1 and 6.2, or 6.3 and 6.4, or 6.5 and 6.6 each associated with one phase of the on-load tap changer 1 and with a corresponding selector contact unit 7.1 ... 7.3 interact. The vacuum interrupters 6.1 ... 6.6 are known from the prior art switching means with a movable switching contact 8.1 ... 8.6 and a fixed contact, not shown. Each voter contact unit 7.1 ... 7.3 each includes a plurality of connectable fixed selector contacts 10.1 ... 10.5, which are electrically connected to the winding taps of the control winding of the tapped transformer, a contact carrier 11.1 ... 11.3, each with two spring-mounted, movable selector contacts 12.1 and 12.2 and in each case two vacuum interrupters 6.1... 6.6, which are arranged directly on a corresponding sliding carriage 13.1... 13.3 of the respective selector contact unit 7.1. Depending on the switching principle, ie after the reactor or resistance fast switching principle, are middle positions in which a movable selector contact, for example, the movable selector contact 12.1, the first fixed selector contact, for example, the fixed selector contact 10.1, and the other movable selector contact, for example movable selector contact 12.2, the second fixed selector contact adjacent to the first fixed selector contact, for example, the fixed selector contact 10.2, connected, as a stationary operating position the on-load tap-changer 1 permissible. Thus, according to the Rekatorschaltprinzip in here 5 illustrated fixed selector contacts 8.1 ... 8.5 nine stationary operating positions possible, while there are only 5 stationary operating positions in an on-load tap-changer 1 according to the Widerstandschnellschalt principle in which no middle positions are allowed.

In der Abbildung der FIG. 1 gibt es beispielhaft drei Wählerkontakteinheiten 7.1, 7.2 und 7.3; eine jede Wählerkontakteinheit 7.1, 7.2 und 7.3 ist dabei mit einer separaten Phase, also Wicklung, des Stufentransformators verbunden. Der Kontaktträger 11.1 ... 11.3 einer jeden Phase ist dabei an einem Gleitschlitten 13.1 ... 13.3 mechanisch fixiert und bildet zusammen mit diesem eine bauliche Einheit. Aufgenommen wird der Gleitschlitten 13.1 ... 13.3 an einer Schiene 14 sowie an einer, zu der Schiene 14 parallel angeordneten, Gewindespindel 15, derart, dass die einzelnen festen Wählerkontakte 10.1 ... 10.5 durch eine Längsverschiebung der beweglichen Kontakte 12.1 ... 12.3 samt Gleitschlitten 13.1 ... 13.3 entlang der Schiene 14 beschaltbar sind.In the picture of the FIG. 1 By way of example, there are three selector contact units 7.1, 7.2 and 7.3; Each voter contact unit 7.1, 7.2 and 7.3 is connected to a separate phase, ie winding, of the tapped transformer. The contact carrier 11.1 ... 11.3 of each phase is mechanically fixed to a slide 13.1 ... 13.3 and forms together with this a structural unit. The sliding carriage 13.1... 13.3 is received on a rail 14 and on a threaded spindle 15, which is arranged parallel to the rail 14, in such a way that the individual fixed selector contacts 10.1 ... 10.5 are displaced by a longitudinal displacement of the movable contacts 12.1 together sliding carriage 13.1 ... 13.3 along the rail 14 are connected.

Bei dieser Ausführungsform des erfindungsgemäßen Laststufenschalters 1 sind die Schaltmittel zur unterbrechungslosen Umschaltung, also die Vakuumschaltröhren 6.1 ... 6.6, direkt an dem entsprechenden Gleitschlitten 13.1 .. 13.3 der jeweiligen Wählerkontakteinheit 7.1 ... 7.3 angeordnet und samt diesem entlang der Gewindespindel 15 verfahrbar ausgebildet. Eine jede Wählerkontakteinheit 7.1 ... 7.3 hat bei dieser Ausführungsform ihre eigene, in dieser Darstellung nicht sichtbare, Spindelmutter in dem entsprechenden Gleitschlitten 13.1 ... 13. 3 angeordnet, so dass die Wählerkontakteinheiten 7.1 ... 7.3 damit entlang der Gewindespindel 15 synchron verschiebbar ausgebildet sind. Die Gewindespindel 15 ist aus mehreren Teilstücken zusammengebaut und weist zwischen den entsprechenden Teilstücken jeweils ein aus elektrisch isolierendem Material geformtes Kupplungsrohr 17.1 ... 17.2 auf. Zudem ist ein Winkelgetriebe 18 vorgesehen, um die Drehbewegung des Motorantriebs 3 auf die Gewindespindel 15 weiterzugeben. Zwischen dem Motorantrieb 3 und dem Winkelgetriebe 18 ist eine Isolierwelle 19 aus dielektrischem Material angeordnet, die die Drehbewegung des Motorantriebs 3 in das Winkelgetriebe 18 einleitet. Die Festkontakte der an dem entsprechenden Gleitschlitten 13.1 ... 13.3 angeordneten Vakuumschaltröhren 6.1 ... 6.6 sind jeweils mittels Litzen 20.1 ... 20.6 an der Trägerplatte 5 verschraubt und mit nicht dargestellten Überschaltdrosseln bzw. Überschaltwiderständen elektrisch verbunden. Überschaltdrosseln sind nach dem Reaktorschaltprinzip und Überschaltwiderständen nach Widerstandsschnellschaltprinzip vorgesehen. Die beweglichen Schaltkontakte 8.1 ... 8.6 der Vakuumschaltröhren 6.1 ... 6.6 stehen mit einer Kipphebelanordnung 21.1 ... 21.6 in mechanischer Wirkverbindung, die jeweils eine Rolle 22.1 ... 22.6 aufweisen. In eingebauten Zustand der Laststufenschalters 1 sind die beweglichen Schaltkontakte 8.1 ... 8.6 der Vakuumschaltröhren 6.1 ... 6.6 mit den beweglichen Wählerkontakten 12.1 ... 12.2 der zugehörigen Phase elektrisch verbunden. Die entsprechenden Rollen 22.1 ... 22.6 wälzen sich bei einer Längsverschiebung des Gleitschlittens 13.1 ... 13.3 an der Profilierung einer Kulissenschiene 23.1 ... 23.3. entlang, so dass damit die jeweilige Kipphebelanordnung 21.1 ... 21.6 den entsprechenden beweglichen Schaltkontakt 8.1 ... 8.6 der dazugehörigen Vakuumschaltröhre 6.1 ... 6.6 abhängig von der Profilierung der Kulissenschiene 23.1 ... 23.3 beschaltet, d.h. öffnet oder schließet. Die festen Wählerkontakte 10.1 ... 10.5, von denen man in dieser Darstellung nur die festen Wählerkontakte 10.3 ... 10.5 sieht, sind hier direkt an der Trägerplatte 5 angeordnet und auf der hier nicht dargestellten, gegenüberliegenden Seite, der Trägerplatte 5 elektrisch mit den entsprechenden Wicklungsanzapfungen der Regelwicklung des Stufentransformators verbunden.In this embodiment, the on-load tap changer 1 according to the invention, the switching means for uninterrupted switching, so the vacuum interrupters 6.1 ... 6.6, directly to the corresponding slide 13.1 .. 13.3 of the respective selector contact unit 7.1 ... 7.3 arranged and formed along this along the threaded spindle 15 movable , Each dial contact unit 7.1 ... 7.3 has its own, not visible in this illustration, spindle nut in the corresponding slide 13.1 ... 13. 3 arranged so that the selector contact units 7.1 ... 7.3 so along the threaded spindle 15 synchronously are formed displaceable. The threaded spindle 15 is assembled from several sections and has between the corresponding sections each one of electrically insulating material molded coupling tube 17.1 ... 17.2. In addition, an angle gear 18 is provided to pass the rotational movement of the motor drive 3 on the threaded spindle 15. Between the motor drive 3 and the angle gear 18, an insulating shaft 19 is disposed of dielectric material, which initiates the rotational movement of the motor drive 3 in the angle gear 18. The fixed contacts of the arranged on the corresponding slide 13.1 ... 13.3 vacuum interrupters 6.1 ... 6.6 are each screwed by means of strands 20.1 ... 20.6 on the support plate 5 and electrically connected to not shown overshoot reactors or Überschaltwiderständen. Overload reactors are designed according to the reactor switching principle and switching resistors according to the resistance switching principle. The movable switching contacts 8.1 ... 8.6 of the vacuum interrupters 6.1 ... 6.6 are with a rocker arm assembly 21.1 ... 21.6 in mechanical Operative connection, each having a roller 22.1 ... 22.6. In the installed state of the on-load tap-changer 1, the movable switching contacts 8.1 ... 8.6 of the vacuum interrupters 6.1 ... 6.6 are electrically connected to the movable selector contacts 12.1 ... 12.2 of the associated phase. The corresponding rollers 22.1 ... 22.6 roll in a longitudinal displacement of the sliding carriage 13.1 ... 13.3 on the profiling of a link rail 23.1 ... 23.3. along, so that so that the respective rocker arm assembly 21.1 ... 21.6 the corresponding movable switching contact 8.1 ... 8.6 of the associated vacuum interrupter 6.1 ... 6.6 depending on the profiling of the guide rail 23.1 ... 23.3 connected, ie opens or closes. The fixed selector contacts 10.1 ... 10.5, of which one sees in this illustration only the fixed selector contacts 10.3 ... 10.5, are here arranged directly on the support plate 5 and on the opposite side not shown here, the support plate 5 electrically to the corresponding winding taps of the control winding of the tapped transformer connected.

Zusammenfassend lässt sich feststellen, dass der erfindungsgemäße Laststufenschalter 1 damit sowohl nach dem Reaktorschaltprinzip, als auch nach dem Widerstandsschnellschaltprinzip einsetzbar ist. Abhängig vom zu Grunde liegenden Umschaltprinzip sind bei hier 5 dargestellten festen Wählerkontakten 10.1 ... 10.5 nach dem Reaktorschaltprinzip 9 stationäre Betriebsstellungen zulässig, während bei einem nach dem Widerstandsschnellschaltprinzip aufgebauten erfindungsgemäßen Laststufenschalter 1 lediglich 5 stationäre Betriebsstellungen zulässig sind.In summary, it can be stated that the on-load tap-changer 1 according to the invention can thus be used both according to the reactor switching principle and according to the resistance rapid-switching principle. Depending on the underlying switching principle 9 stationary operating positions are allowed at fixed contactors 10.1 ... 10.5 shown here according to the reactor switching principle, while only 5 stationary operating positions are permitted in a constructed according to the resistance switching principle according to the invention on-load tap-changer.

Der erfindungsgemäße Laststufenschalter kann besonders vorteilhaft an Verteiltransformatoren zur Spannungsregelung von Ortsnetzen verwendet werden.The on-load tap-changer according to the invention can be used particularly advantageously on distribution transformers for voltage regulation of local networks.

BEZUGSZEICHENREFERENCE NUMBERS

11
LaststufenschalterOLTC
22
Getriebemodultransmission module
33
Motorantriebmotor drive
44
Dichtmodulsealing module
55
Trägerplattesupport plate
6.1 ... 6.66.1 ... 6.6
VakuumschaltröhreVacuum interrupter
7.1 ... 7.37.1 ... 7.3
WählerkontakteinheitVoter contact unit
8.1 ... 8.68.1 ... 8.6
bewegliche Schaltkontaktemovable switching contacts
9.1 ... 9.69.1 ... 9.6
Festkontaktefixed contacts
10.1 ... 10.510.1 ... 10.5
feste Wählerkontaktefixed voter contacts
11.1 ... 11.311.1 ... 11.3
Kontaktträgercontact support
12.1, 12.212.1, 12.2
bewegliche Wählerkontaktemobile selector contacts
13.1 ... 13.313.1 ... 13.3
GleitschlittenSliding carriage
1414
Schienerail
1515
Gewindespindelscrew
17.1 ... 7.217.1 ... 7.2
Kupplungsrohrcoupling tube
1818
Winkelgetriebeangle gear
1919
Isolierwelleinsulating shaft
20.1 ... 20.620.1 ... 20.6
Litzebraid
21.1 ... 21.621.1 ... 21.6
Kipphebelanordnungrocker
22.1 ... 22.622.1 ... 22.6
Rollenroll
23.1 ... 23.323.1 ... 23.3
Kulissenschienebackdrop rail

Claims (15)

  1. On-load tap changer (1) for uninterrupted switching over between different winding taps of a tapped transformer, wherein
    - at least one selector contact unit (7.1, 7.2, 7.3) with a respective plurality of fixed selector contacts (10.1, 10.2, 10.3, 10.4, 10.5), which are respectively electrically connected with the individual winding taps, is arranged along a line;
    - the fixed selector contacts (10.1, 10.2, 10.3, 10.4, 10.5) are actuable by two longitudinally displaceable movable selector contacts (12.1, 12.2);
    - for the uninterrupted switching over of two vacuum interrupters (6.1, 6.2, 6.3, 6.4, 6.5, 6.6) are provided for each phase;
    - a motor drive (3) for introducing a drive movement into the on-load tap changer (1) is provided;
    characterised in that
    - the selector contact units (7.1 ... 7.3) and the vacuum interrupters (6.1 ... 6.6) are so directly actuable by means of the common motor drive (3) that introduction of the drive movement of the motor drive (3) into the selector contact units (7.1.... 7.3) and the vacuum interrupters (6.1 ... 6.6) takes place without interposition of a mechanical energy store;
    - two respective vacuum interrupters (6.1 and 6.2, 6.3 and 6.4, 6.5 and 6.6) per phase are directly arranged at the corresponding slide carriage (13.1 ... 13.3) of the respective selector contact unit (7.1 ... 7.3);
    - the motor drive (3) drives a central threaded spindle (15) by means of an angle transmission (18);
    - each slide carriage (13.1 ... 13.3) has a separate spindle nut and
    - the threaded spindle (15) co-operates with the spindle nut of each slide carriage (13.1 ... 13.3) and the rotational movement is so converted into a synchronous longitudinal displacement of the slide carriages (13. 1 ... 13.3) that not only the movable selector contacts (12.1, 12.2), but also the vacuum interrupters (6.1 ... 6.6) are thereby actuable.
  2. On-load tap changer (1) according to the preceding claim, wherein
    - the entire load changeover switch (1) is arranged by means of a transmission module (2) at the underside of a transformer cover.
  3. On-load tap changer (1) according to the preceding claim, wherein
    - the transmission module (2) comprises a flange-like sealing module (4).
  4. On-load tap changer (1) according to any one of the preceding claims, wherein - a support plate (5) of a dielectric material, at which the selector contact units (7.1 ... 7.3) and the vacuum interrupters (6.1 ... 6.6) are arranged, is provided.
  5. On-load tap changer according to any one of the preceding claims, wherein
    - the selector contact units (7.1 ... 7.3) each comprise a respective slide carriage (12.1 ... 12.3), a respective contact carrier (11.1 ... 11.3) and respective movable selector contacts (12.1, 12.2) which co-operate with at least one fixed selector contact (10.1 ... 10.5).
  6. On-load tap changer (1) according to any one of the preceding claims and claim 4, wherein
    - the movable selector contacts (12.1, 12.2) are each received in a contact carrier (11.1 ... 11.3) and co-operate with fixed selector contacts (10.1 ... 10.5) arranged at the support plate (15).
  7. On-load tap changer (1) according to any one of the preceding claims, wherein
    - the movable selector contacts (12.1, 12.2) of a phase in each stationary operational setting connect at least one fixed selector contact (10.1 ... 10.5) of the same phase of the on-load tap changer (1).
  8. On-load tap changer (1) according to any one of the preceding claims, wherein
    - in each instance two movable selector contacts (12.1, 12.2) are received in a contact carrier (11.1 ... 11.3) to be resiliently mounted.
  9. On-load tap changer (1) according to any one of the preceding claims and claim 2, wherein
    - the threaded spindle (15) is of multi-part construction.
  10. On-load tap changer (1) according to any one of the preceding claims, wherein
    - the several parts of the threaded spindle (15) are interconnected by means of coupling tubes (17.1, 17.2) to be secure against relative rotation.
  11. On-load tap changer (1) according to any one of the preceding claims, wherein
    - the coupling tubes (17.1, 17.2) consist of dielectric materials.
  12. On-load tap changer (1) according to any one of the preceding claims, wherein
    - the movable switch contact (8.1 ... 8.6) of the corresponding vacuum interrupter (6.1 ... 6.6) is so disposed in operative connection by means of a roller (22.1 ... 22.6), which is provided at a corresponding rocker arm arrangement (21.1 ... 21.6), with the profiling of a guide rail (23.1 ... 23.3) that through a longitudinal displacement of the selector contact unit (7.1 ... 7.3) the corresponding roller (22.1 ... 22.6) rolls along the profiling of the guide rail (23.1 ... 23.3) with maintained contact, so that the rocker lever arrangement (21.1 ... 21.6) connects the corresponding vacuum interrupter (6.1 ... 6.6).
  13. On-load tap changer (1) according to the preceding claim and claim 4, wherein
    - the guide rail (23.1 ... 23.3) is arranged directly at the support plate (5).
  14. On-load tap changer (1) according to one of the two preceding claims and claim 4, wherein
    - the guide rail (23.1 ... 23.3) and the support plate (6) are constructed as one component.
  15. On-load tap changer (1) according to any one of the preceding claims for use in voltage regulation of a distributing transformer.
EP13712755.1A 2012-04-20 2013-03-25 On-load tap changer Not-in-force EP2839493B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202012101476U DE202012101476U1 (en) 2012-04-20 2012-04-20 OLTC
PCT/EP2013/056276 WO2013156266A1 (en) 2012-04-20 2013-03-25 On-load tap changer

Publications (2)

Publication Number Publication Date
EP2839493A1 EP2839493A1 (en) 2015-02-25
EP2839493B1 true EP2839493B1 (en) 2016-10-19

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ID=48013975

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Application Number Title Priority Date Filing Date
EP13712755.1A Not-in-force EP2839493B1 (en) 2012-04-20 2013-03-25 On-load tap changer

Country Status (10)

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US (1) US20150303006A1 (en)
EP (1) EP2839493B1 (en)
JP (1) JP2015515138A (en)
KR (1) KR20150003844A (en)
CN (1) CN104246950B (en)
DE (1) DE202012101476U1 (en)
HK (1) HK1202979A1 (en)
RU (1) RU2014146590A (en)
UA (1) UA116202C2 (en)
WO (1) WO2013156266A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106653426B (en) * 2017-01-12 2018-08-17 济南爱迪电气设备有限公司 A kind of special on-load voltage regulating switch of distribution transformer
CN112290682B (en) * 2020-10-30 2022-05-13 中国人民解放军火箭军工程大学 Switch grouping method and system for power distribution network reconstruction
EP4123677A1 (en) * 2021-07-23 2023-01-25 Hitachi Energy Switzerland AG On-load tap changer with positioning device and method for assembling an on-load tap changer

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Publication number Priority date Publication date Assignee Title
DE2806282C2 (en) 1978-02-15 1980-04-10 Maschinenfabrik Reinhausen Gebrueder Scheubeck Gmbh & Co Kg, 8400 Regensburg Diverter switch for step switches of step transformers
RO112973B1 (en) * 1992-07-16 1998-02-27 Reinhausen Maschf Scheubeck Step switch
DE4237165C1 (en) 1992-11-04 1994-03-17 Reinhausen Maschf Scheubeck Single-pole tap changer with linear contact actuation for a tap transformer
FR2711839B1 (en) * 1993-10-25 1996-02-02 Menini Manfred Controlled power switch.
DE19847745C1 (en) 1998-10-16 2000-01-05 Reinhausen Maschf Scheubeck Tapping switch for interruption-free switchover between different winding tappings of a tapped transformer
DE19855860C1 (en) 1998-12-03 2000-02-17 Reinhausen Maschf Scheubeck Mechanical energy store for transformer stepping switch has spring tensioning carriage and switch carriage mounted on parallel guide rods each provided with guide roller on one side and guide surface on opposite side
US7145760B2 (en) * 2000-12-15 2006-12-05 Abb Technology Ltd. Tap changer monitoring
UA84417C2 (en) * 2003-04-03 2008-10-27 Машиненфабрик Райнхаузен Гмбх Multipoint switch (versions)
US7053327B2 (en) * 2004-10-26 2006-05-30 Eaton Corporation Apparatus and method for use in circuit interrupters
CN201134380Y (en) * 2007-12-26 2008-10-15 沈阳华利能源设备制造有限公司 72.5KV three-position switch
DE102009035699A1 (en) * 2009-07-30 2011-02-10 Maschinenfabrik Reinhausen Gmbh Arrangement of a tap changer on a control transformer
DE102009043171B4 (en) 2009-09-26 2014-11-20 Maschinenfabrik Reinhausen Gmbh Step switch with vacuum interrupters

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Also Published As

Publication number Publication date
HK1202979A1 (en) 2015-10-09
CN104246950B (en) 2017-02-22
KR20150003844A (en) 2015-01-09
US20150303006A1 (en) 2015-10-22
UA116202C2 (en) 2018-02-26
DE202012101476U1 (en) 2013-07-23
RU2014146590A (en) 2016-06-10
CN104246950A (en) 2014-12-24
JP2015515138A (en) 2015-05-21
EP2839493A1 (en) 2015-02-25
WO2013156266A1 (en) 2013-10-24

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