EP3050067A1 - Step switch - Google Patents

Step switch

Info

Publication number
EP3050067A1
EP3050067A1 EP14776854.3A EP14776854A EP3050067A1 EP 3050067 A1 EP3050067 A1 EP 3050067A1 EP 14776854 A EP14776854 A EP 14776854A EP 3050067 A1 EP3050067 A1 EP 3050067A1
Authority
EP
European Patent Office
Prior art keywords
preselector
tap changer
switching element
switch
switching
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
EP14776854.3A
Other languages
German (de)
French (fr)
Other versions
EP3050067B1 (en
Inventor
Uwe Kaltenborn
Thomas Strof
Christian Hurm
Anatoli Saveliev
Gerhard BÄUML
Alfred Bieringer
Eduard ZERR
Wolfgang Albrecht
Martin Hausmann
Andreas Stocker
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 EP3050067A1 publication Critical patent/EP3050067A1/en
Application granted granted Critical
Publication of EP3050067B1 publication Critical patent/EP3050067B1/en
Not-in-force 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
    • H01H9/0027—Operating mechanisms
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00—Variable transformers or inductances not covered by group H01F21/00
    • H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
    • H01F29/04—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings having provision for tap-changing without interrupting the load current
    • 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
    • H01H9/0016—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
    • H01H9/0038—Tap change devices making use of vacuum switches

Definitions

  • the present invention relates to a tap changer, as is commonly used in a control transformer having at least one main winding and a control winding.
  • the tap changer has at least one fine selector for Beschaltten more taps of the control winding and at least one connected to the main winding selection, via which the control winding is connected in different polarity with the parent winding.
  • By means of the tap changer series connection of the main winding with the control winding can be tapped according to the tapping of the control winding desired different voltages. In this way, it is possible to freely select the input / output voltage of the variable transformer in a desired range. It is needed for each phase of the three-phase current such a tap changer.
  • the tap changer is usually designed as a rotary switch.
  • the preselector and fine selector may be integrated on the axis of the rotary switch.
  • the fine selector is usually formed either by Fein hereleressore, which are arranged on different levels of a rotary switch. Each second tap of the control winding is connected alternately at each level. Between the arranged on both levels fine-selector contacts is switched by a known diverter switch, which usually has switching resistors. Such an arrangement is e.g. in DE 10 2009 060 132 described.
  • the fine selector can also be formed by a Fein Wegler prominence, which switches all arranged on a plane contacts the control winding. This fine-selection contact can also have switching resistances.
  • the preselector has at least one movable switching element and two switching contacts which can be contacted by the switching element, wherein the electrical connection permanently contacts the switching element.
  • the switching element is regularly connected to the main winding and the switch contacts with the two ends of the control winding. The electrical connection thus connects the switching element of the preselector with the
  • the preselector comprises at least one switching element which is mechanically or electrically coupled to at least one switching element of the coupling switch.
  • the coupling is designed such that the switching element of the preselector is set after closing the switching element of the coupling switch in a neutral position in which the selection is connected to neither of the two ends of the control winding. This has the purpose of excluding the preselection from the entire switching process, which is now realized by the fine selector itself.
  • the coupling is designed such that the switching element of the coupling switch opens after closing the switching element of the preselector. If at the end of the switching, the switching element of the preselector is contacted with the other end of the control winding to which the fine selector has previously switched, the coupling switch is thus automatically opened.
  • the gas-free switching of the fine-vote can be done by a known diverter switch. It is also possible to use a fine selector without diverter switch, which switches in one plane. This usually has a Fein Strukturlertive with Kochschaltwidermayn, to ensure in this way a gas-free switching from one tap to the next. However, instead of or in addition to the switching resistors, it can also be provided with one or more vacuum switches.
  • the diverter switch is often located in its own oil and gas-tight vessel.
  • the diverter switch has at least one transient resistance to make the transition phase of switching from one tap to the next uninterruptible.
  • the control winding remains in contact with the main winding, so that no voltages can occur, for example due to the capacitive coupling of the control winding relative to the main winding.
  • the fine selectors may have a diverter switch, as described in DE 10 2009 060 132. This allows gas-free switching operations of the fine selection.
  • the tap changer ie the preselector and / or the fine selector is designed as a rotary switch. Such an arrangement has proven to be advantageous for power transformers, which are used in particular in the field of power supply. If several phases of a transformer are to be switched simultaneously, the corresponding phases can be arranged in different levels of the rotary switch one behind the other. For example, all three phases of a three-phase current can be switched simultaneously.
  • the tap changer i. the selector and / or the fine selector, designed as a snap-action switch, which allows short switching operations and reduces the transition time of the switching from one tap to the next.
  • the preselector is designed as a reverser whose switching element is designed for connection to the main winding and whose two switching contacts are designed for contacting the two ends of the control winding.
  • Such a preselection circuit is very easy to implement and also reliable.
  • the invention further relates to a control transformer having at least one main winding and at least one control winding of the type described above, in which control transformer, the control winding has a plurality of taps, which are connected by the fine selector, and in which the selection connects the control winding in the desired with the parent winding ,
  • Wender the final position of the preselector
  • the coupling switch is switched to switch the preselector from its open normal position to a closed switching position. Since the coupling switch is closed only for switching over the preselector or inverter, the closed position is also called switchover position.
  • the preselection is now switched to a non-contacting neutral position. Since the control winding is connected to the main winding via the fine selector and the switching is to be carried out by means of the fine selector, the preselector must be brought into the non-contacting neutral position, otherwise there will be a potential difference between the inverter and the fine selector Connection and the coupling switch would be closed shortly. Now the fine selector is switched through all taps of the control winding to the other end of the control winding. This switching is effected, as already mentioned, by means of the auxiliary contacts which may be present or by means of a known diverter switch at least substantially free of gas. When the tap changer has reached the other end position on the control winding, the preselector is also switched to the new end position. Here, the preselector is due to the closed coupling contact at the same potential as the fine selector. Now the coupling switch is opened again to its normal position. This completes the arc and gas-free switching of the preselector.
  • the switching element of the preselector is coupled to the switching element of the coupling switch in order to automate the sequence of operation of the inverter and coupling switch and thus to make error-free.
  • the switching times for example the times in which both switching elements are closed, before one of the two switching elements opens again.
  • an electrical or electronic control for the operation of the switching elements of the inverter and / or the coupling switch can be used.
  • FIG. 1 is a circuit diagram of a tap changer of a control transformer with a main winding and a control winding, which tap changer comprises a preselector, fine selector, diverter switch and coupling switch
  • FIGS. 2a-f show a series of circuit diagrams for indicating the switching over of the preselector with the aid of the fine selector, e.g. in a control transformer from FIG.
  • the control transformer 10 includes a main winding 12 and a control winding 14 with a plurality of taps 16.
  • a tap changer 17 is arranged, which consists of a preselector 20 and a fine selector 18.
  • the fine selector 8 in turn consists of fine selector contacts 32, 34 and a diverter switch 24 which switches between the fine-selection contacts 32, 34.
  • the preselector 20 is designed as a turner.
  • the preselector 20 connects the control winding 14 with the main winding 12 in the desired polarity, and the Fein constructivell 8 selects via the Fein Weglertivee 32, 34 to be connected taps 16 of the control winding 14, wherein the switching between the Fein WeglerCounten 32, 34 in this embodiment on the Diverter 24 takes place.
  • the main winding 12 is connected to the switching element 22 of the preselector 20, while the switching contacts 21, 23 are connected to the ends of the control winding 14.
  • the switching element 22 of the preselector 20 thus connects either one of the two ends of the control winding via the switch contacts 21, 23 with the main winding 12 or it remains in a non-contacting neutral position, as shown in Fig. 2c and 2d.
  • the fine selector 8 is connected via a diverter switch 24 with a load discharge line 28.
  • the diverter switch 24 has a slide switch, which contacts the two fine-selection contact 32, 34 alternately under a short transition phase using transition resistances 30 of the diverter switch 24.
  • the diverter switch 24 thus contains two overshoot resistors 30, one of which is connected to a respective fine-selection contact 32, 34. In this way, the sliding switching element 26 moves over four contacts of the load changeover switch 24, wherein with the interposition of the switching resistors 30 of a tap 16 to the next tap 16 of the control winding 14 is switched.
  • the taps to be connected are pre-selected by the voltage selector contacts 32, 34 de-energized.
  • the sliding switching element 26 moves from the illustrated right end position in the diverter switch 24 to the left end position (dashed line) and vice versa.
  • the tap changer 17 can also be designed as a so-called load selector, in which the fine selector 18 consists of the diverter switch 24 and the fine selector contacts 32, 34.
  • the preselection of the tap to be connected 16 and the load switching is performed in one step.
  • the fine selector 18 is now connected via an electrical connection 36 to the preselector (inverter) 20, preferably to its switching element 22.
  • a coupling switch 38 is arranged, with which the connection between the load dissipation 28 of the diverter switch 24 and the main winding 12 can be interrupted.
  • the switching element 40 of the coupling switch 38 is preferably coupled via a mechanical or electrical coupling 42 with the switching element 22 of the inverter 20, whereby their activity can be synchronized.
  • the switching element may be formed as a vacuum interrupter or snap contact.
  • Fig. 2a shows the normal operating position of the tap changer 17, in which the coupling switch 38 is open, so that the voltage at the Lastab effet 28 of the diverter switch 24 corresponds to the voltage corresponding to the tap 16 of the control winding 14 and the corresponding voltage component of the main winding 12.
  • the coupling switch 38 is closed (Fig. 2b), when the fine selector 18 is on the contact position of the Wenders 20 corresponding winding tap 16 of the control winding 14.
  • the switching element 22 of the inverter 20 is switched to a non-contacting neutral position, as shown in Fig. 2c.
  • the switching elements 40 of the coupling switch 38 and the switching element 22 of the inverter 20 may be coupled together, so that the opening and closing of the switching elements coupled, that is inevitably synchronized.
  • the actuation can in a preferred embodiment via a transmission (not shown here), which is arranged between the diverter switch and selector, take place.
  • a transmission not shown here
  • the control winding 14 is now connected to the main winding 12 solely via the fine selector 18 and load changeover switch 24.
  • the diverter switch 24 always switches back and forth between the two fine selector contacts 32, 34, after which the fine selector has preselected the "next" tap.
  • the switching element 22 of the inverter again becomes active 20 in contact position with the lower end of the control winding 14, where the fine selector 18 and the diverter switch 24 are applied, since the inverter 20, the main winding 12 and the fine selector 18 with the diverter switch 24 via the closed coupling contact 38 at the same voltage level 2c, the switching transformer 38 is again opened, as shown in FIG has now returned to its normal operating position.

Abstract

The invention relates to a step switch, comprising a pre-selector and a fine selector. The invention is characterized in that the step switch has a connection (36) between the pre-selector and the fine selector (18), at least one coupling switch (38) being arranged in said connection. A pre-selector can be switched in a largely gas-free manner by means of said switchable connection with the aid of the fine selector.

Description

Stufenschalter  step switch
Die vorliegende Erfindung betrifft einen Stufenschalter, wie er üblicherweise in einem Regeltransformator eingesetzt wird, der wenigstens eine Stammwicklung und eine Regelwicklung aufweist. Der Stufenschalter hat wenigstens einen Feinwähler zum Beschälten mehrerer Anzapfungen der Regelwicklung als auch wenigstens einen mit der Stammwicklung verbundenen Vorwähler, über welchen die Regelwicklung in unterschiedlicher Polung mit der Stammwicklung verbindbar ist. Durch die mittels des Stufenschalters erfolgte Serienschaltung der Stammwicklung mit der Regelwicklung lassen sich entsprechend der Anzapfung der Regelwicklung gewünschte unterschiedliche Spannungen abgreifen. Auf diese Weise ist es möglich, die Ein/Ausgangsspannung des Regeltransformators in einem gewünschten Bereich frei zu wählen. Es wird für jede Phase des Drehstroms eine derartiger Stufenschalter benötigt. Der Stufenschalter ist üblicherweise als Drehschalter ausgebildet. Der Vorwähler und Feinwähler können auf der Achse des Drehschalters integriert ausgebildet sein. Der Feinwähler ist üblicherweise entweder durch Feinwählerkontakte gebildet, die auf unterschiedlichen Ebenen eines Dreh Schalters angeordnet sind. Auf jeder Ebene ist jeweils alternierend jede zweite Anzapfung der Regelwicklung geschaltet. Zwischen den auf beiden Ebenen angeordneten Feinwählerkontakten wird durch einen an sich bekannten Lastumschalter umgeschaltet, der in der Regel Überschaltwiderstände aufweist. Eine derartige An- Ordnung ist z.B. in der in der DE 10 2009 060 132 beschrieben. Der Feinwähler kann jedoch auch durch einen Feinwählerkontakt gebildet sein, der alle auf einer Ebene angeordneten Kontakte der Regelwicklung schaltet. Auch dieser Feinwählerkontakt kann Überschaltwiderstände aufweisen. Ein Problem besteht nun insbesondere beim Umschalten des Vorwählers, d.h., wenn mittels des Vorwählers die Polung der Regelwicklung geändert werden soll. Hierbei wird die Verbindung des Vorwählers mit einem ersten Wicklungsende der Regelwicklung auf eine Verbindung mit dem zweiten Wicklungsende der Regelwicklung umgeschaltet. Dieser Umschaltvorgang wird zwar in der Regel stromlos durchgeführt, dennoch werden sowohl in der Stammwicklung als auch in der Regelwicklung Spannungen induziert, die zusammen mit der kapazitiven Kopplung der Wicklungen zueinander und zur Erde zu einem Lichtbogen und damit zu einer Gaserzeugung beim Umschalten des Vorwählers führen können. The present invention relates to a tap changer, as is commonly used in a control transformer having at least one main winding and a control winding. The tap changer has at least one fine selector for Beschaltten more taps of the control winding and at least one connected to the main winding selection, via which the control winding is connected in different polarity with the parent winding. By means of the tap changer series connection of the main winding with the control winding can be tapped according to the tapping of the control winding desired different voltages. In this way, it is possible to freely select the input / output voltage of the variable transformer in a desired range. It is needed for each phase of the three-phase current such a tap changer. The tap changer is usually designed as a rotary switch. The preselector and fine selector may be integrated on the axis of the rotary switch. The fine selector is usually formed either by Feinwählerkontakte, which are arranged on different levels of a rotary switch. Each second tap of the control winding is connected alternately at each level. Between the arranged on both levels fine-selector contacts is switched by a known diverter switch, which usually has switching resistors. Such an arrangement is e.g. in DE 10 2009 060 132 described. However, the fine selector can also be formed by a Feinwählerkontakt, which switches all arranged on a plane contacts the control winding. This fine-selection contact can also have switching resistances. A problem now exists in particular when switching the preselector, that is, when the polarity of the control winding to be changed by means of the preselector. In this case, the connection of the preselector with a first winding end of the control winding is switched to a connection to the second winding end of the control winding. Although this switching process is normally carried out without current, yet voltages are induced both in the main winding and in the control winding, which together with the capacitive coupling of the windings to each other and to earth can lead to an arc and thus to gas generation when switching the preselector ,
Es ist daher Aufgabe der Erfindung, einen Stufenschalter zu schaffen, der ein zumindest weitgehend gasfreies Umschalten des Vorwählers ermöglicht. Vorzugsweise hat der Vorwähler wenigstens ein bewegbares Schaltelement und zwei Schaltkontakte, die von dem Schaltelement kontaktierbar sind, wobei die elektrische Verbindung das Schaltelement dauerhaft kontaktiert. Das Schaltelement ist regelmäßig mit der Stammwicklung verbunden und die Schaltkontakte mit den beiden Enden der Regelwicklung. Die elektrische Verbindung verbindet somit das Schaltelement des Vorwählers mit derIt is therefore an object of the invention to provide a tap changer, which allows at least largely gas-free switching of the preselector. Preferably, the preselector has at least one movable switching element and two switching contacts which can be contacted by the switching element, wherein the electrical connection permanently contacts the switching element. The switching element is regularly connected to the main winding and the switch contacts with the two ends of the control winding. The electrical connection thus connects the switching element of the preselector with the
Stammwicklung und dem Feinwähler. Da der Feinwähler beim Umschalten des Vorwählers das gleiche Ende der Regelwicklung wie das Schaltelement des Vorwählers kontaktiert, führt dies dazu, dass die Trennung des Schaltelements des Vorwählers von dem Schaltkontakt in eine neutrale, nicht kontaktierende Stellung potentialfrei verläuft, und damit ohne die Erzeu- gung eines Lichtbogen und entsprechenden Gaseintrag in ein umgebendes Kühlmedium, z.B. Öl. Main winding and the fine selector. Since the fine selector when switching the preselector contacts the same end of the control winding as the switching element of the preselector, this means that the separation of the switching element of the preselector from the switching contact to a neutral, non-contacting position is potential-free, and thus without the generation an arc and corresponding gas entry into a surrounding cooling medium, eg Oil.
Vorzugsweise weist der Vorwähler wenigstens ein Schaltelement auf, das mechanisch oder elektrisch mit wenigstens einem Schaltelement des Koppelschalters gekoppelt ist. Auf diese Weise kann die korrelierte Tätigkeit der beiden Schaltelemente des Vorwählers und des Koppelschalters auf einfache Weise miteinander verknüpft werden, so dass Fehlbedienungen ausgeschlossen werden. So wird vorzugsweise die Kopplung derart konzipiert, dass das Schaltelement des Vorwählers nach dem Schließen des Schaltelements des Koppelschalters in eine Neutralstellung gestellt wird, in der der Vorwähler mit keiner der beiden Enden der Regelwicklung verbunden ist. Dies hat den Zweck, den Vorwähler aus dem gesamten Um- schaltprozess auszuklammern, der nun durch den Feinwähler selbst realisiert wird. Preferably, the preselector comprises at least one switching element which is mechanically or electrically coupled to at least one switching element of the coupling switch. In this way, the correlated activity of the two switching elements of the preselector and the coupling switch can be linked to one another in a simple manner, so that operating errors are excluded. Thus, preferably, the coupling is designed such that the switching element of the preselector is set after closing the switching element of the coupling switch in a neutral position in which the selection is connected to neither of the two ends of the control winding. This has the purpose of excluding the preselection from the entire switching process, which is now realized by the fine selector itself.
Weiter ist in einer vorteilhaften Weiterbildung der Erfindung die Kopplung derart konzipiert, dass das Schaltelement des Koppelschalters nach dem Schließen des Schaltelements des Vorwählers öffnet. Wenn am Ende der Umschaltung das Schaltelement des Vorwählers mit dem anderen Ende der Regelwicklung kontaktiert wird, auf welches der Feinwähler vorher umgeschaltet hat, wird somit automatisch der Koppelschalter geöffnet. Further, in an advantageous embodiment of the invention, the coupling is designed such that the switching element of the coupling switch opens after closing the switching element of the preselector. If at the end of the switching, the switching element of the preselector is contacted with the other end of the control winding to which the fine selector has previously switched, the coupling switch is thus automatically opened.
Wie bereits oben erwähnt, kann das gasfreie Schalten des Feinwählers durch einen an sich bekannten Lastumschalter erfolgen. Es ist auch möglich, einen Feinwähler ohne Lastumschalter zu verwenden, der in einer Ebene schaltet. Dieser hat üblicherweise einen Feinwählerkontakt mit Überschaltwiderständen, um auf diese Weise ein gasfreies Umschalten von einer Anzapfung zur nächsten zu gewährleisten. Er kann jedoch statt oder zusätzlich zu den Überschaltwiderständen auch mit einem oder mehreren Vakuumschaltern versehen sein. In diesem Zusammenhang wird darauf hingewiesen, dass sich der Lastumschalter oft in einem eigenen öl- und gasdichten Gefäß befindet. Vorzugsweise hat der Lastumschalter wenigstens einen Überschaltwiderstand, um die Übergangsphase des Umschaltens von einer Anzapfung zur nächsten unterbrechungsfrei zu machen. Hierdurch bleibt die Regelwicklung mit der Stammwicklung kontaktiert, so dass kei- ne Spannungen z.B. durch die kapazitive Ankopplung der Regelwicklung relativ zu Stammwicklung auftreten können. Vorzugsweise kann der Feinwählern ein Lastumschalter haben, wie er in der DE 10 2009 060 132 beschrieben ist. Dies ermöglicht gasfreie Schaltvorgänge des Feinwählers. In einer vorteilhaften Weiterbildung der Erfindung ist der Stufenschalter, d.h. der Vorwähler und/oder der Feinwähler als Drehschalter ausgebildet. Eine derartige Anordnung hat sich für Leistungstransformatoren, die insbesondere im Bereich der Stromversorgung Verwendung finden, als vorteilhaft herausgebildet. Wenn mehrere Phasen eines Transformators gleichzeitig geschaltet werden sollen, können die entsprechenden Phasen in unterschiedlichen Ebe- nen des Drehschalters hintereinander angeordnet werden. So lassen sich beispielsweise alle drei Phasen eines Drehstroms gleichzeitig schalten. As already mentioned above, the gas-free switching of the fine-vote can be done by a known diverter switch. It is also possible to use a fine selector without diverter switch, which switches in one plane. This usually has a Feinwählerkontakt with Überschaltwiderständen, to ensure in this way a gas-free switching from one tap to the next. However, instead of or in addition to the switching resistors, it can also be provided with one or more vacuum switches. In this context, it should be noted that the diverter switch is often located in its own oil and gas-tight vessel. Preferably, the diverter switch has at least one transient resistance to make the transition phase of switching from one tap to the next uninterruptible. As a result, the control winding remains in contact with the main winding, so that no voltages can occur, for example due to the capacitive coupling of the control winding relative to the main winding. Preferably, the fine selectors may have a diverter switch, as described in DE 10 2009 060 132. This allows gas-free switching operations of the fine selection. In an advantageous embodiment of the invention, the tap changer, ie the preselector and / or the fine selector is designed as a rotary switch. Such an arrangement has proven to be advantageous for power transformers, which are used in particular in the field of power supply. If several phases of a transformer are to be switched simultaneously, the corresponding phases can be arranged in different levels of the rotary switch one behind the other. For example, all three phases of a three-phase current can be switched simultaneously.
Vorzugsweise ist der Stufenschalter, d.h. der Vorwähler und/oder der Feinwähler, als Schnappschalter ausgebildet, was kurze Schaltvorgänge ermöglicht und die Übergangszeit des Schaltens von einer Anzapfung zur nächsten reduziert. Preferably, the tap changer, i. the selector and / or the fine selector, designed as a snap-action switch, which allows short switching operations and reduces the transition time of the switching from one tap to the next.
Vorzugsweise ist der Vorwähler als Wender ausgebildet, dessen Schaltelement zur Verbindung mit der Stammwicklung konzipiert ist und dessen beide Schaltkontakte zur Kontaktie- rung der beiden Enden der Regelwicklung konzipiert sind. Ein derartiger Vorwähler ist schal- tungstechnisch sehr einfach zu realisieren und außerdem zuverlässig. Preferably, the preselector is designed as a reverser whose switching element is designed for connection to the main winding and whose two switching contacts are designed for contacting the two ends of the control winding. Such a preselection circuit is very easy to implement and also reliable.
Die Erfindung betrifft weiterhin einen Regeltransformator mit wenigstens einer Stammwicklung und wenigstens einer Regelwicklung der vorstehend beschriebenen Art, in welchem Regeltransformator die Regelwicklung mehrere Anzapfungen aufweist, die von dem Fein- Wähler beschaltbar sind, und in welchem der Vorwähler die Regelwicklung in gewünschter mit der Stammwicklung verbindet. The invention further relates to a control transformer having at least one main winding and at least one control winding of the type described above, in which control transformer, the control winding has a plurality of taps, which are connected by the fine selector, and in which the selection connects the control winding in the desired with the parent winding ,
In einem erfindungsgemäßen Verfahren zum Umschalten des Vorwählers eines Stufenschalters in einem Regeltransformator der vorstehend beschriebenen Art wird folgende Abfolge von Schritten durchgeführt: a) der Feinwähler wird, falls erforderlich, auf die Endposition des Vorwählers (nachfolgend kurz: Wender) an der Regelwicklung gefahren. Auf diese Weise wird sichergestellt, dass sich der Feinwähler auf dem gleichen Potential befindet wie der Wender, wenn der Koppelschalter geschlossen wird. Ist dies nicht der Fall, so kann es zu einem Kurzschluss entsprechend der Potentialdifferenz zwischen dem Ende der Regelwicklung kommen, an welchem der Wender kontaktiert und der Anzapfung, in welcher sich der Stufenschalter gerade befindet. In a method according to the invention for switching the preselector of a tap changer in a control transformer of the type described above, the following sequence of steps is carried out: a) the fine selector, if necessary, to the final position of the preselector (hereinafter referred to as: Wender) on the control winding. In this way ensures that the fine selector is at the same potential as the inverter when the coupling switch is closed. If this is not the case, then a short circuit can occur according to the potential difference between the end of the control winding, at which the inverter contacts and the tap in which the tap changer is currently located.
Der Koppelschalter wird für das Umschalten des Vorwählers von seiner offenen Normalstellung in eine geschlossene Umschaltstellung geschaltet. Da der Koppelschalter nur für das Umschalten des Vorwählers bzw. Wenders geschlossen wird, wird die geschlossene Stel- lung auch Umschaltstellung genannt wird. The coupling switch is switched to switch the preselector from its open normal position to a closed switching position. Since the coupling switch is closed only for switching over the preselector or inverter, the closed position is also called switchover position.
Der Vorwähler wird nun in eine nicht kontaktierende Neutralstellung geschaltet. Da die Regelwicklung über den Feinwähler mit der Stammwicklung verbunden ist und die Umschaltung mittels des Feinwählers durchgeführt werden soll, muss der Vorwähler in die nicht kontaktie- rende Neutralstellung gebracht werden, da andernfalls eine Potentialdifferenz zwischen dem Wender und dem Feinwähler auftritt, die über die elektrische Verbindung und den Koppelschalter kurz geschlossen würde. Nun wird der Feinwähler über alle Anzapfungen der Regelwicklung auf das andere Ende der Regelwicklung durchgeschaltet. Dieses Durchschalten erfolgt, wie bereits erwähnt, mittels der eventuell vorhandenen Hilfskontakte oder mittels ei- nes an sich bekannten Lastumschalters zumindest weitgehend gasfrei. Wenn der Stufenschalter die andere Endposition an der Regelwicklung erreicht hat, wird auch der Vorwähler auf die neue Endposition geschaltet. Hierbei liegt der Vorwähler aufgrund des geschlossenen Koppelkontakts auf dem gleichen Potential wie der Feinwähler. Nun wird der Koppelschalter wieder in seine Normalstellung geöffnet. Hiermit ist die lichtbogen- und gasfreie Umschaltung des Vorwählers abgeschlossen. The preselection is now switched to a non-contacting neutral position. Since the control winding is connected to the main winding via the fine selector and the switching is to be carried out by means of the fine selector, the preselector must be brought into the non-contacting neutral position, otherwise there will be a potential difference between the inverter and the fine selector Connection and the coupling switch would be closed shortly. Now the fine selector is switched through all taps of the control winding to the other end of the control winding. This switching is effected, as already mentioned, by means of the auxiliary contacts which may be present or by means of a known diverter switch at least substantially free of gas. When the tap changer has reached the other end position on the control winding, the preselector is also switched to the new end position. Here, the preselector is due to the closed coupling contact at the same potential as the fine selector. Now the coupling switch is opened again to its normal position. This completes the arc and gas-free switching of the preselector.
Um das Verfahren zu vereinfachen, kann vorzugsweise vorgesehen sein, dass das Schaltelement des Vorwählers mit dem Schaltelement des Koppelschalters gekoppelt ist, um damit die Abfolge der Betätigung von Wender und Koppelschalter zu automatisieren und damit fehlerfrei zu machen. Auf diese Weise können sich auch die Schaitzeiten, zum Beispiel die Zeiten einstellen lassen, in denen beide Schaltelemente geschlossen sind, bevor eines der beiden Schaltelemente wieder öffnet. Durch die Kopplung können somit auch Totzeiten bei den Schaltvorgängen minimiert werden. Selbstverständlich kann auch eine elektrische oder elektronische Steuerung für die Betätigung der Schaltelemente des Wenders und/oder des Koppelschalters verwendet werden. Die obigen Ausführungsformen der Erfindung sind in beliebiger Weise kombinierbar. In order to simplify the method, it can preferably be provided that the switching element of the preselector is coupled to the switching element of the coupling switch in order to automate the sequence of operation of the inverter and coupling switch and thus to make error-free. In this way, it is also possible to set the switching times, for example the times in which both switching elements are closed, before one of the two switching elements opens again. By coupling thus dead times in the switching operations can be minimized. Of course, an electrical or electronic control for the operation of the switching elements of the inverter and / or the coupling switch can be used. The above embodiments of the invention can be combined in any way.
Die Erfindung wird nun beispielsweise anhand der schematischen Zeichnung beschrieben. In dieser zeigen: The invention will now be described by way of example with reference to the schematic drawing. In this show:
Fig. 1 ein Schaltbild eines Stufenschalters eines Regeltransformators mit Stammwicklung und Regelwicklung, welcher Stufenschalter einen Vorwähler, Feinwähler, Lastumschalter und Koppelschalter aufweist, Fig. 2a-f eine Serie von Schaltbildern zur Verdeutlichung des Umschaltens des Vorwählers mit Hilfe des Feinwählers, z.B. in einem Regeltransformators aus Fig.1 is a circuit diagram of a tap changer of a control transformer with a main winding and a control winding, which tap changer comprises a preselector, fine selector, diverter switch and coupling switch, FIGS. 2a-f show a series of circuit diagrams for indicating the switching over of the preselector with the aid of the fine selector, e.g. in a control transformer from FIG.
1. 1.
Der Regeltransformator 10 enthält eine Stammwicklung 12 und eine Regelwicklung 14 mit mehreren Anzapfungen 16. In dem Regeltransformator 10 ist ein Stufenschalter 17 angeordnet, der aus einem Vorwähler 20 und einem Feinwähler 18 besteht. Der Feinwähler 8 wiederum besteht aus Feinwählerkontakten 32, 34 und einem Lastumschalter 24, der zwischen den Feinwählerkontakten 32, 34 umschaltet. Der Vorwähler 20 ist als Wender ausgeführt. Der Vorwähler 20 verbindet die Regelwicklung 14 mit der Stammwicklung 12 in gewünschter Polarität, und der Feinwählerl 8 wählt über die Feinwählerkontakte 32, 34 die zu beschaltenden Anzapfungen 16 der Regelwicklung 14 vor, wobei das Umschalten zwischen den Feinwählerkontakten 32, 34 in diesem Ausführungsbeispiel über den Lastumschalter 24 erfolgt. Die Stammwicklung 12 ist mit dem Schaltelement 22 des Vorwählers 20 verbunden, während dessen Schaltkontakte 21 , 23 mit den Enden der Regelwicklung 14 verbunden sind. Das Schaltelement 22 des Vorwählers 20 verbindet somit wahlweise eines der beiden Enden der Regelwicklung über die Schaltkontakte 21 , 23 mit der Stammwicklung 12 oder es verbleibt in einer nicht kontaktierenden Neutralstellung, wie dies in Fig. 2c und 2d gezeigt ist. The control transformer 10 includes a main winding 12 and a control winding 14 with a plurality of taps 16. In the control transformer 10, a tap changer 17 is arranged, which consists of a preselector 20 and a fine selector 18. The fine selector 8 in turn consists of fine selector contacts 32, 34 and a diverter switch 24 which switches between the fine-selection contacts 32, 34. The preselector 20 is designed as a turner. The preselector 20 connects the control winding 14 with the main winding 12 in the desired polarity, and the Feinwähll 8 selects via the Feinwählerkontakte 32, 34 to be connected taps 16 of the control winding 14, wherein the switching between the Feinwählerkontakten 32, 34 in this embodiment on the Diverter 24 takes place. The main winding 12 is connected to the switching element 22 of the preselector 20, while the switching contacts 21, 23 are connected to the ends of the control winding 14. The switching element 22 of the preselector 20 thus connects either one of the two ends of the control winding via the switch contacts 21, 23 with the main winding 12 or it remains in a non-contacting neutral position, as shown in Fig. 2c and 2d.
Der Feinwählerl 8 ist über einen Lastumschalter 24 mit einer Lastableitung 28 verbunden. Der Lastumschalter 24 verfügt über einen Gleitschalter, der die beiden Feinwählerkontakt 32, 34 unter einer kurzen Übergangsphase unter Nutzung von Überschaltwiderständen 30 des Lastumschalters 24 alternierend kontaktiert. Der Lastumschalter 24 enthält somit zwei Über- schaltwiderstände 30, von denen jeweils einer mit jeweils einem Feinwählerkontakt 32, 34 verbunden ist. Auf diese Weise fährt das Gleitschaltelement 26 über vier Kontakte des Last- Umschalters 24, wobei unter Zwischenschaltung der Überschaltwiderstände 30 von einer Anzapfung 16 zur nächsten Anzapfung 16 der Regelwicklung 14 umgeschaltet wird. Vor der eigentlichen Umschaltung im Lastumschalter 24 werden die zu beschaltenden Anzapfungen spannungslos von den Feinwählerkontakten 32, 34 vorgewählt. Mit jedem Umschalten fährt somit das Gleitschaltelement 26 von der dargestellten rechten Endposition im Lastumschalter 24 auf die linke Endposition (gestrichelte Darstellung) und vice versa. Im Lastumschalter 24 können auch andere Bauteile und Schaltfolgen verwendet werden, z.B. Vakuumschaltröhren mit Hilfsschaltern. Weiterhin kann der Stufenschalter 17 auch als sog. Lastwähler ausgebildet sein, bei dem der Feinwähler 18 aus dem Lastumschalter 24 und den Feinwählerkontakten 32, 34 besteht. Hier wird die Vorwahl der zu beschaltenden Anzapfung 16 und die Lastumschaltung in einem Schritt durchgeführt. The fine selector 8 is connected via a diverter switch 24 with a load discharge line 28. The diverter switch 24 has a slide switch, which contacts the two fine-selection contact 32, 34 alternately under a short transition phase using transition resistances 30 of the diverter switch 24. The diverter switch 24 thus contains two overshoot resistors 30, one of which is connected to a respective fine-selection contact 32, 34. In this way, the sliding switching element 26 moves over four contacts of the load changeover switch 24, wherein with the interposition of the switching resistors 30 of a tap 16 to the next tap 16 of the control winding 14 is switched. Before the actual switching in the diverter switch 24, the taps to be connected are pre-selected by the voltage selector contacts 32, 34 de-energized. With each switching thus the sliding switching element 26 moves from the illustrated right end position in the diverter switch 24 to the left end position (dashed line) and vice versa. In the diverter switch 24, other components and switching sequences can be used, eg vacuum interrupters with auxiliary switches. Furthermore, the tap changer 17 can also be designed as a so-called load selector, in which the fine selector 18 consists of the diverter switch 24 and the fine selector contacts 32, 34. Here, the preselection of the tap to be connected 16 and the load switching is performed in one step.
Erfindungsgemäß sind nun der Feinwähler 18 über eine elektrische Verbindung 36 mit dem Vorwähler (Wender) 20, vorzugsweise mit dessen Schaltelement 22 verbunden. In dieser Verbindung 36 ist ein Koppelschalter 38 angeordnet, mit welchem sich die Verbindung zwischen der Lastableitung 28 des Lastumschalters 24 und der Stammwicklung 12 unterbre- chen lässt. Das Schaltelement 40 des Koppelschalters 38 ist vorzugsweise über eine mechanische oder elektrische Kopplung 42 mit dem Schaltelement 22 des Wenders 20 gekoppelt, womit deren Tätigkeit synchronisiert werden kann. Das Schaltelement kann als Vakuumschaltröhre oder Schnappkontakt ausgebildet sein. Das Umschalten des Wenders in einem oben beschriebenen Stufenschalter 17 wird in den nachfolgenden Fig. 2a-2f erläutert. According to the invention, the fine selector 18 is now connected via an electrical connection 36 to the preselector (inverter) 20, preferably to its switching element 22. In this connection 36, a coupling switch 38 is arranged, with which the connection between the load dissipation 28 of the diverter switch 24 and the main winding 12 can be interrupted. The switching element 40 of the coupling switch 38 is preferably coupled via a mechanical or electrical coupling 42 with the switching element 22 of the inverter 20, whereby their activity can be synchronized. The switching element may be formed as a vacuum interrupter or snap contact. The switching of the inverter in a tap changer 17 described above is explained in the following FIGS. 2a-2f.
In den Figuren sind identische oder funktionsgleiche Teile mit den identischen Bezugszeichen versehen. Der Lastumschalter 24 ist in den schematischen Zeichnungsabfolgen der Fig. 2a-2f nur sehr schematisch dargestellt. Fig. 2a zeigt die normale Betriebsstellung des Stufenschalters 17, in welchem der Koppelschalter 38 geöffnet ist, so dass die Spannung an der Lastableitung 28 des Lastumschalters 24 der Spannung entsprechend der Anzapfung 16 der Regelwicklung 14 und dem entsprechenden Spannungsanteil der Stammwicklung 12 entspricht. Zum Umschalten des Vorwählers 20, das heißt zum Umschalten der Polarisierung der Regelwicklung 14, wird der Koppelschalter 38 geschlossen (Fig. 2b), wenn der Feinwähler 18 auf der der Kontaktposition des Wenders 20 entsprechenden Wicklungsanzapfung 16 der Regelwicklung 14 liegt. Nun wird das Schaltelement 22 des Wenders 20 in eine nicht kontaktierende neutrale Position geschaltet, wie es in Fig. 2c gezeigt ist. Die Schaltelemente 40 des Koppelschalters 38 und das Schaltelement 22 des Wenders 20 können miteinander gekoppelt sein, so dass das Öffnen und Schließen der Schaltelemente gekoppelt, das heißt zwangsläufig synchronisiert erfolgt. Die Betätigung kann in einer bevorzugten Ausführungsform über ein Getriebe (hier nicht dargestellt), das zwischen Lastumschalter und Wähler angeordnet ist, erfolgen. Weiterhin ist es möglich, dass die Betätigung direkt vom Vorwähler 20 abgegriffen wird. Auf diese Weise ist eine Fehlbedienung der entsprechenden Schaltelemen- te ausgeschlossen. In der in Fig. 2c dargestellten Umschaltphase ist nun die Regelwicklung 14 allein über den Feinwähler 18 und Lastumschalter 24 mit der Stammwicklung 12 verbunden. Nun fährt der Feinwähler 18 mittels der Feinwählerkontakt 32, 34 in Verbindung mit der Betätigung des Lastumschalters 24 an die andere Endposition der Regelwicklung 14, wie es in Fig. 2d dargestellt ist. Der Lastumschalter 24 schaltet dabei immer zwischen den beiden Feinwählerkontakten 32, 34 hin und her, nach dem der Feinwähler die„nächste" Anzapfung vorgewählt hat. Wenn der Feinwähler die Schaltung zum anderen Ende der Regelwicklung 14 durchgeschaltet hat, wird wiederum das Schaltelement 22 des Wenders 20 in Kontaktstellung zu dem unteren Ende der Regelwicklung 14 geschaltet, an dem der Feinwähler 18 und der Lastumschalter 24 anliegen. Da der Wender 20, die Stammwicklung 12 und den Fein- Wähler 18 mit dem Lastumschalter 24 über den geschlossenen Koppelkontakt 38 auf dem gleichen Spannungsniveau liegen, erfolgt auch dieser Umschaltvorgang des Wenders 20 potentialfrei, das heißt ohne Erzeugung eines Lichtbogens und damit gasfrei. Nach dem Umschalten des Wenders gemäß Fig. 2e wird nun wieder der Koppelschalter 38 geöffnet, wie es in Fig. 2f dargestellt ist. Der Regeltransformator 10 hat nun wieder seine normale Betriebs- position erreicht Feinwähler. In the figures, identical or functionally identical parts are provided with the identical reference numerals. The diverter switch 24 is shown in the schematic drawing sequences of Fig. 2a-2f only very schematically. Fig. 2a shows the normal operating position of the tap changer 17, in which the coupling switch 38 is open, so that the voltage at the Lastableitung 28 of the diverter switch 24 corresponds to the voltage corresponding to the tap 16 of the control winding 14 and the corresponding voltage component of the main winding 12. To switch the preselector 20, that is, to switch the polarization of the control winding 14, the coupling switch 38 is closed (Fig. 2b), when the fine selector 18 is on the contact position of the Wenders 20 corresponding winding tap 16 of the control winding 14. Now, the switching element 22 of the inverter 20 is switched to a non-contacting neutral position, as shown in Fig. 2c. The switching elements 40 of the coupling switch 38 and the switching element 22 of the inverter 20 may be coupled together, so that the opening and closing of the switching elements coupled, that is inevitably synchronized. The actuation can in a preferred embodiment via a transmission (not shown here), which is arranged between the diverter switch and selector, take place. Furthermore, it is possible that the operation is tapped directly from the preselector 20. In this way, a maloperation of the corresponding Schaltelemen- te is excluded. In the switching phase shown in FIG. 2c, the control winding 14 is now connected to the main winding 12 solely via the fine selector 18 and load changeover switch 24. Now moves the fine selector 18 by means of the fine dial contact 32, 34 in conjunction with the operation of the diverter switch 24 to the other end position of the control winding 14, as shown in Fig. 2d. The diverter switch 24 always switches back and forth between the two fine selector contacts 32, 34, after which the fine selector has preselected the "next" tap. When the fine selector has switched the circuit to the other end of the control winding 14, the switching element 22 of the inverter again becomes active 20 in contact position with the lower end of the control winding 14, where the fine selector 18 and the diverter switch 24 are applied, since the inverter 20, the main winding 12 and the fine selector 18 with the diverter switch 24 via the closed coupling contact 38 at the same voltage level 2c, the switching transformer 38 is again opened, as shown in FIG has now returned to its normal operating position.
Die Erfindung ist nicht auf die dargestellten Ausführungsbeispiele beschränkt, sondern kann innerhalb des Schutzbereichs der nachfolgenden Ansprüche variiert werden. Hierbei können anstatt mechanischer Schaltkontakte wie z.B. Vakuumschaltröhren auch Halbleiterschalt- elementen wie z.B. IGBT's verwendet werden. Diese Halbleiterschaltelemente könne im Feinwähler 18, Lastumschalter 24, Vorwähler 20 und den Feinwählerkontakten 32, 34 zum Schalten eingesetzt werden. The invention is not limited to the illustrated embodiments, but may be varied within the scope of the following claims. Here, instead of mechanical switching contacts such as vacuum interrupters can also Halbleiterschalt- elements such as IGBTs are used. These semiconductor switching elements can be used in the fine selector 18, diverter switch 24, preselector 20 and the fine-selection contacts 32, 34 for switching.

Claims

Patentansprüche claims
1 . Stufenschalter, umfassend einen Vorwähler (20) und einen Feinwähler (18), dadurch gekennzeichnet, dass der Stufenschalter eine elektrische Verbindung (36) zwischen dem Vorwähler und dem Feinwähler aufweist, in welcher mindestens ein Koppelschalter (38) angeordnet ist. 1 . Tap changer, comprising a preselector (20) and a fine selector (18), characterized in that the tap changer has an electrical connection (36) between the preselector and the fine selector, in which at least one coupling switch (38) is arranged.
2. Stufenschalter nach Anspruch 1 , bei welchem der Vorwähler (20) wenigstens ein bewegbares Schaltelement (22) und zwei Schaltkontakte (21 , 23) aufweist, die von dem Schaltelement kontaktierbar sind, wobei die elektrische Verbindung (36) mit dem Schaltelement (22) verbunden ist. 2. tap changer according to claim 1, wherein the preselector (20) at least one movable switching element (22) and two switching contacts (21, 23) contacted by the switching element, wherein the electrical connection (36) with the switching element (22 ) connected is.
3. Stufenschalter nach Anspruch 1 oder 2, bei welchem der Vorwähler (20) wenigstens ein Schaltelement (22) aufweist, das mechanisch oder elektrisch mit wenigstens einem Schaltelement (40) des Koppelschalters (38) gekoppelt ist. Third tap changer according to claim 1 or 2, wherein the preselector (20) comprises at least one switching element (22) which is mechanically or electrically coupled to at least one switching element (40) of the coupling switch (38).
4. Stufenschalter nach Anspruch 3, bei welchem die Koppelung derart konzipiert ist, dass das Schaltelement (22) des Vorwählers (20) nach dem Schließen des Schaltelements (40) des Koppelschalters (38) in eine nicht verbundene Neutralstellung gestellt wird. 4. tap changer according to claim 3, wherein the coupling is designed such that the switching element (22) of the preselector (20) after closing the switching element (40) of the coupling switch (38) is placed in an unconnected neutral position.
5. Stufenschalter nach Anspruch 3 oder 4, bei welchem die Koppelung derart konzipiert ist, dass das Schaltelement (40) des Koppelschalters (38) nach dem Schließen des Schaltelements (22) des Vorwählers (20) öffnet. 5. tap changer according to claim 3 or 4, wherein the coupling is designed such that the switching element (40) of the coupling switch (38) opens after closing the switching element (22) of the preselector (20).
6. Stufenschalter nach einem der vorherigen Ansprüche, in welchem der Koppelschalter (38) über ein Getriebe, das zwischen Lastumschalter (24) und Feinwähler (18) angeordnet ist, betätig bar ist. 6. Tap changer according to one of the preceding claims, in which the coupling switch (38) via a gearbox which is arranged between the diverter switch (24) and fine selector (18), is actu bar.
7. Stufenschalter nach einem der vorherigen Ansprüche, in welchem die Feinwählerkontakte (32, 34) als Schnappschalter ausgebildet sind oder eine Vakuumschaltröhre enthalten. 7. tap changer according to one of the preceding claims, in which the Feinwählerkontakte (32, 34) are designed as a snap-action switch or contain a vacuum interrupter.
8. Stufenschalter nach einem der vorherigen Ansprüche, der als Drehschalter ausgebildet ist. 8. Tap changer according to one of the preceding claims, which is designed as a rotary switch.
9. Stufenschalter nach einem der vorherigen Ansprüche, in welchem der Feinwähler (18) als Lastwähler ausgebildet ist. 9. Tap changer according to one of the preceding claims, in which the fine selector (18) is designed as a load selector.
10. Stufenschalter nach einem der vorherigen Ansprüche, in welchem der Vorwähler (20) als Wender ausgebildet ist. 10. tap changer according to one of the preceding claims, in which the preselector (20) is designed as a turner.
1 1 . Regeltransformator (10) mit wenigstens einer Stammwicklung (12) und einer Regelwicklung (14), der einen Stufenschalter (17) nach einem der vorhergehenden Ansprüche aufweist, in welchem die Regelwicklung mehrere Anzapfungen (16) aufweist, die von dem Feinwähler (18) beschaltbar sind, und in welchem der Vorwähler (20) die Regelwicklung (14) in gewünschter Polung mit der Stammwicklung (12) verbindet. 1 1. A control transformer (10) having at least one main winding (12) and a control winding (14) having a tap changer (17) according to one of the preceding claims, in which the control winding has a plurality of taps (16) connectable by the fine selector (18) and in which the preselector (20) connects the control winding (14) in the desired polarity to the main winding (12).
12. Verfahren zum Umschalten eines Vorwählers (20) in einem Stufenschalter (17) nach einem der Ansprüche 1 bis 10, gekennzeichnet durch folgende Abfolge von Schritten: a) der Feinwähler (18) wird, falls erforderlich, auf die Endposition des Vorwählers an der Regelwicklung (14) gefahren, 12. A method for switching a preselector (20) in a tap changer (17) according to one of claims 1 to 10, characterized by the following sequence of steps: a) the fine selector (18) is, if necessary, to the end position of the preselector at the Control winding (14) driven,
b) der Koppelschalter (38) wird von einer offenen Normalstellung in eine geschlossene Umschaltstellung geschaltet,  b) the coupling switch (38) is switched from an open normal position to a closed switching position,
c) der Vorwähler (20) wird in eine nicht kontaktierende Neutralstellung geschaltet,  c) the preselector (20) is switched to a non-contacting neutral position,
d) der Feinwähler (18) wird über die Anzapfungen (16) der Regelwicklung (14) auf die entgegengesetzte Endposition an der Regelwicklung (14) durchgeschaltet,  d) the fine selector (18) is connected through the taps (16) of the control winding (14) to the opposite end position on the control winding (14),
e) der Vorwähler (20) wird auf die Endposition an der Regelwicklung (14) geschaltet, an welcher der Feinwähler (18) kontaktiert,  e) the preselector (20) is switched to the end position on the control winding (14) at which the fine selector (18) contacts,
f) der Koppelkontakt (40) wird in seine Normalstellung geöffnet.  f) the coupling contact (40) is opened in its normal position.
EP14776854.3A 2013-09-26 2014-09-26 Tap changer Not-in-force EP3050067B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013110656.0A DE102013110656A1 (en) 2013-09-26 2013-09-26 step switch
PCT/EP2014/070586 WO2015044325A1 (en) 2013-09-26 2014-09-26 Step switch

Publications (2)

Publication Number Publication Date
EP3050067A1 true EP3050067A1 (en) 2016-08-03
EP3050067B1 EP3050067B1 (en) 2018-11-14

Family

ID=51626527

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14776854.3A Not-in-force EP3050067B1 (en) 2013-09-26 2014-09-26 Tap changer

Country Status (6)

Country Link
US (1) US9984833B2 (en)
EP (1) EP3050067B1 (en)
CN (1) CN105580099B (en)
DE (1) DE102013110656A1 (en)
UA (1) UA121963C2 (en)
WO (1) WO2015044325A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016117526B3 (en) * 2016-09-16 2018-02-15 Maschinenfabrik Reinhausen Gmbh Variable-speed switch, control transformer with on-load tap-changer and method for switching an on-load tap-changer
CN106935425B (en) * 2017-03-24 2018-09-07 西安森宝电气工程有限公司 A kind of and mating polarity switch of load ratio bridging switch
US10747244B2 (en) * 2018-02-13 2020-08-18 SAI Advanced Power Solutions Transformer device with modified voltage tap arrangement
EP4002409A1 (en) * 2020-11-13 2022-05-25 Hitachi Energy Switzerland AG On-load tap changer

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5118609B1 (en) * 1968-03-13 1976-06-11
US3609516A (en) * 1968-10-01 1971-09-28 Tsuneo Nagatoshi Slide transformer
JPS507727B1 (en) * 1969-11-04 1975-03-28
DE2201937C2 (en) * 1972-01-15 1974-01-24 Reinhausen Maschf Scheubeck Arrangement for voltage regulation of step transformers
US4081741A (en) * 1975-10-29 1978-03-28 Asea Aktiebolag On-load tap changer
US4061963A (en) * 1976-04-27 1977-12-06 Westinghouse Electric Corporation Load tap changer system
SE402502B (en) * 1976-10-29 1978-07-03 Asea Ab WINDING COUPLER
DE19836463C1 (en) * 1998-08-12 1999-10-21 Reinhausen Maschf Scheubeck Electric stepping switch for stepping transformer
FR2873489B1 (en) * 2004-07-20 2006-10-06 Areva T & D Sa TRANSFORMER SHIFT SYSTEM IN CHARGE
DE102009060132B3 (en) * 2009-12-23 2011-05-12 Maschinenfabrik Reinhausen Gmbh Tap changer with polarity switch on a control transformer
CN102013815B (en) * 2010-08-09 2012-09-05 国家电网公司 High-voltage DC converter transformer and connection method for on-load tap-changer thereof
DE102012202667A1 (en) * 2012-02-22 2013-08-22 Maschinenfabrik Reinhausen Gmbh Step switch on a control transformer

Also Published As

Publication number Publication date
CN105580099B (en) 2018-09-04
UA121963C2 (en) 2020-08-25
WO2015044325A1 (en) 2015-04-02
DE102013110656A1 (en) 2015-03-26
CN105580099A (en) 2016-05-11
EP3050067B1 (en) 2018-11-14
US9984833B2 (en) 2018-05-29
US20160211089A1 (en) 2016-07-21

Similar Documents

Publication Publication Date Title
EP0375687B1 (en) Thyristor on-load change-over switch
DE102010008973B4 (en) Step switch of the hybrid type with semiconductor switching elements
EP3286774B1 (en) On-load tap changer, a method of operating an on-load tap changer and electric system with an on-load tap changer
DE102010007535B4 (en) Tap-changer with freewheeling element
EP3050067B1 (en) Tap changer
EP2638553B1 (en) Tap changer
WO2010072623A1 (en) Medium-/low-voltage transformer having tap changing, and method for the operation thereof
EP3050066B1 (en) Switching assembly comprising a selection switch
EP3365906B1 (en) Controllable local network transformer
WO2020030445A1 (en) On-load tap changer for switching without any interruption between winding taps of a tap-changing transformer and tap-changing transformer
DE102013110653A1 (en) Tap-changer for a transformer
DE102014106997A1 (en) Switching arrangement for a tapped transformer and method for operating such a switching arrangement
DE102010024326A1 (en) step switch
WO2010072622A1 (en) Stepping switch for medium-low voltage transformers
EP2586049B1 (en) Tap changer
DE102011116158A1 (en) OLTC
DE598245C (en) Device for uninterrupted voltage regulation under load by means of step transformers
DE102010024327B4 (en) step switch
DE102022117592A1 (en) On-load tap changer and method for operating an on-load tap changer
DE102010007534A1 (en) step switch
EP4200886A1 (en) On-load tap changer and method for actuating an on-load tap changer
AT3152U2 (en) CIRCUIT ARRANGEMENT FOR A LOAD SWITCH
DE2235851A1 (en) PROCEDURE FOR STEPPING A THREE-PHASE TRANSFORMER OF ANY CIRCUIT UNDER LOAD

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20160426

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

RIN1 Information on inventor provided before grant (corrected)

Inventor name: STROF, THOMAS

Inventor name: HAUSMANN, MARTIN

Inventor name: BAEUML, GERHARD

Inventor name: ALBRECHT, WOLFGANG

Inventor name: SAVELIEV, ANATOLI

Inventor name: ZERR, EDUARD

Inventor name: HURM, CHRISTIAN

Inventor name: BIERINGER, ALFRED

Inventor name: STOCKER, ANDREAS

Inventor name: KALTENBORN, UWE

DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20170419

REG Reference to a national code

Ref country code: HK

Ref legal event code: DE

Ref document number: 1226859

Country of ref document: HK

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20180508

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

Ref country code: AT

Ref legal event code: REF

Ref document number: 1065832

Country of ref document: AT

Kind code of ref document: T

Effective date: 20181115

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502014010090

Country of ref document: DE

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20181114

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181114

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181114

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190214

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190314

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181114

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181114

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181114

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181114

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181114

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181114

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190215

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190314

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181114

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181114

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181114

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181114

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502014010090

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181114

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181114

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181114

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181114

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20190815

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181114

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181114

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181114

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190926

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190930

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190926

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190930

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20190930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190930

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20190926

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190926

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190930

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20200924

Year of fee payment: 7

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 1065832

Country of ref document: AT

Kind code of ref document: T

Effective date: 20190926

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20200923

Year of fee payment: 7

Ref country code: BG

Payment date: 20200923

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190926

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181114

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181114

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20140926

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 502014010090

Country of ref document: DE

REG Reference to a national code

Ref country code: SE

Ref legal event code: EUG

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181114

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210927

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20220401

Ref country code: BG

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20220331