EP2517216A1 - Step switch comprising a polarity switch for a variable transformer - Google Patents

Step switch comprising a polarity switch for a variable transformer

Info

Publication number
EP2517216A1
EP2517216A1 EP10776582A EP10776582A EP2517216A1 EP 2517216 A1 EP2517216 A1 EP 2517216A1 EP 10776582 A EP10776582 A EP 10776582A EP 10776582 A EP10776582 A EP 10776582A EP 2517216 A1 EP2517216 A1 EP 2517216A1
Authority
EP
European Patent Office
Prior art keywords
winding
tap
polarity
switch
load discharge
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
EP10776582A
Other languages
German (de)
French (fr)
Other versions
EP2517216B1 (en
Inventor
Axel Kraemer
Dazhong Shen
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
Maschinenfabrik Reinhausen Gebrueder Scheubeck GmbH and Co KG
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 EP2517216A1 publication Critical patent/EP2517216A1/en
Application granted granted Critical
Publication of EP2517216B1 publication Critical patent/EP2517216B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/16—Impedances connected with contacts
    • 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

Definitions

  • the invention relates to a provided with selection tap changer with a poling circuit for uninterrupted control of a control transformer.
  • Stepped transformer in which the reversing contacts of the tap changer are designed as changeover contacts.
  • the tap winding of the corresponding tapped transformer is briefly electrically isolated from the main winding during operation of the preselector. It assumes a potential that results from the voltages of the neighboring windings as well as the
  • DE 32 24 860 A describes a similar arrangement to a tap changer in which - as shown in Figure 1b - also a Polungswiderstand is in turn articulated at the center of the tap winding.
  • JP 55-133515 A and DD 47965 B1 It is known from JP 55-133515 A and DD 47965 B1 to have a preselected one
  • Step switch with poling circuit for uninterrupted control of a control transformer on the control winding voltage-dependent resistors to protect against overvoltages when switching the preselector to order.
  • Polarity switch is connected to the load dissipation. Characterized the step winding is articulated during the preselection circuit to a defined potential.
  • the object of the invention is therefore to provide a tap changer with an improved poling circuit, which entails a significantly reduced arcing at preselection.
  • the general inventive idea which applies to both embodiments in the independent claims, is to provide two separate polarity resistors which are connected to the beginning and to the end of the step winding.
  • two polarity resistors form a bypass for the capacitive current; the capacitive current commutes from one side to the other side - unlike the state of the art, it does not have to be switched off by the preselector, ie. H. to be interrupted. As a result, significantly less arcing occurs.
  • Figure 1 shows an arrangement according to the prior art
  • Pole arrangement will be explained. Shown is a main winding 1 and a tap winding 2 of a tapped transformer. At the tap winding 2, a tap changer is connected, which has a voter 3. The selector 3 first selects the new one before switching
  • Winding tap the step winding 2 before, to be switched to.
  • the switching itself is done by a known diverter switch 4 of the tap changer, which will not be discussed in detail here.
  • the tap changer has a preselector 5, by the beginning or end of the tap winding 2 to the end of the.
  • Main winding 1 can be switched.
  • the actual poling circuit consists of a to the center 6 of the tap winding 2 hinged polarity resistor 7, which is either directly connected to the load discharge line 9 or, as shown here, via a polarity switch 8 is only briefly connected to the load discharge 9.
  • FIG. 2 shows a first embodiment of the invention
  • a first polarity resistor 11 is provided according to the invention at the beginning of the step winding 10 2, the means of a first
  • Polungsschalters 12 is in communication with the load dissipation.
  • a second polarity resistor 14 is further provided at the end 13 of the step winding 2, which is in turn connected to the load discharge line 9 via a second polarity switch 15.
  • the two polarity switches 12, 15 are only briefly turned on before the start of the operation of the preselector 5, so that only briefly the beginning 10 and the end 13 of the tap winding 2 are hinged to a defined potential.
  • Figure 3 shows a second embodiment of the invention in which no polarity switches are provided. Rather, here are solid and permanently at the beginning of the 10 stage winding 2 a first
  • both embodiments can be realized in single-phase tap changers without much effort.
  • the polarity resistors 11, 14 can be designed asymmetrically in both embodiments, so that the specific polarity conditions can be easily adjusted or evened out on the respective transformer.

Abstract

The invention relates to a step switch provided with a preselector and a polarity circuit, a separate polarisation resistance being respectively provided at the beginning and the end of the stepped winding. Optionally, the two polarisation resistances can be connected continuously or via separate polarity switches.

Description

Stufenschalter mit Polungsschalter an einem Regeltransformator  Tap changer with polarity switch on a control transformer
Die Erfindung betrifft einen mit Vorwähler versehenen Stufenschalter mit einer Polungsschaltung zur unterbrechungslosen Regelung an einem Regeltransformator. The invention relates to a provided with selection tap changer with a poling circuit for uninterrupted control of a control transformer.
Die DE 19 42 567 A beschreibt einen Stufenschalter mit einem Vorwähler zur wählbaren DE 19 42 567 A describes a tap changer with a selection to selectable
Reihenschaltung von Stufen der Stufenwicklungen zur zugehörigen Stammwicklung eines Series connection of stages of the stage windings to the associated main winding of a
Stufentransformators, bei dem die Wenderkontakte des Stufenschalters als Umschaltkontakte ausgebildet sind. Stepped transformer in which the reversing contacts of the tap changer are designed as changeover contacts.
Bei solchen Stufenschaltern wird die Stufenwicklung des entsprechenden Stufentransformators während der Betätigung des Vorwählers kurzzeitig galvanisch von der Stammwicklung getrennt. Dabei nimmt sie ein Potential an, das sich aus den Spannungen der Nachbarwicklungen sowie den  In such tap changers, the tap winding of the corresponding tapped transformer is briefly electrically isolated from the main winding during operation of the preselector. It assumes a potential that results from the voltages of the neighboring windings as well as the
Kopplungkapazitäten zu diesen Wicklungen bzw. zu geerdeten Teilen ergibt. Die damit entstehenden Differenzspannungen beanspruchen die Schaltstrecke der sich öffnenden Vorwählerkontakte und können u. U. zu unzulässigen Entladungserscheinungen am Vorwähler führen. Um dies zu vermeiden, ist es bekannt, die Mitte der Stufenwicklung über einen Polungswiderstand kurzzeitig während der Umschaltphase des Vorwählers mittels eines Polungsschalters mit einem festen Punkt der Coupling capacitances to these windings or grounded parts results. The resulting differential voltages take up the switching path of the opening preselector contacts and can u. U. lead to invalid discharge phenomena at selection. To avoid this, it is known, the center of the tap winding over a Polungswiderstand briefly during the switching phase of the preselector by means of a polarity switch with a fixed point of
Stammwicklung, häufig dem Sternpunkt des Transformators, zu verbinden und damit die Main winding, often the neutral point of the transformer, and thus connect the
Stufenwicklung an ein definiertes Potential anzulenken. Stage winding to a defined potential to steer.
Die DE 32 24 860 A beschreibt eine ähnliche Anordnung an einem Stufenschalter, bei der - dort gezeigt in Figur 1b - ebenfalls ein Polungswiderstand wiederum an der Mitte der Stufenwicklung angelenkt ist. DE 32 24 860 A describes a similar arrangement to a tap changer in which - as shown in Figure 1b - also a Polungswiderstand is in turn articulated at the center of the tap winding.
Die DE 195 42 880 C1 zeigt einen für eine solche kurzzeitige Anlenkung der Mitte der Stufenwicklung besonders geeigneten Polungsschalter.  DE 195 42 880 C1 shows a particularly suitable for such a short-term articulation of the middle of the tap winding polarity switch.
Aus JP 55-133515 A und DD 47965 B1 ist es bekannt, bei einem mit Vorwähler versehenen It is known from JP 55-133515 A and DD 47965 B1 to have a preselected one
Stufenschalter mit Polungsschaltung zur unterbrechungslosen Regelung an einem Regeltransformator über der Regelwicklung spannungsabhängige Widerstände zum Schutz gegen Überspannungen beim Schalten des Vorwählers anzuordnen. Step switch with poling circuit for uninterrupted control of a control transformer on the control winding voltage-dependent resistors to protect against overvoltages when switching the preselector to order.
Die DE 24 21 728 A1 beschreibt einen mit einem Vorwähler versehenen Stufenschalter mit DE 24 21 728 A1 describes a provided with a selection tap changer
Polungsschaltung, wobei über der Regelwicklung spannungsabhängige Widerstände in Kombination mit Ölfunkenstrecken zum Schutz vor Überspannungen beim Schalten des Vorwählers angeordnet sind. Aus der DE 11 65 154 A schließlich ist es bereits bekannt, bei einem mit Vorwähler versehenen Stufenschalter die Mittelanzapfung der Regelwicklung über einen spannungsabhängigen Widerstand zum Schutz vor Überspannungen beim Schalten des Vorwählers mit der Lastableitung zu verbinden und parallel zu den Anschlüssen der Regelwicklung spannungsabhängtge Widerstände vorzusehen. Polungsschaltung, wherein over the control winding voltage-dependent resistors in combination with oil spark gaps to protect against overvoltages when switching the preselector are arranged. Finally, from DE 11 65 154 A, it is already known to connect the center tap of the control winding via a voltage-dependent resistor to protect against overvoltages when switching the preselector with the load dissipation in a provided with selection tap changer and provide parallel to the terminals of the control winding spannungsabhängtge resistors ,
Zusammenfassend lässt sich der bekannte Stand der Technik bei mit Vorwählern versehenen Stufenschaltern mit Polungsschaltung wie folgt zusammenfassen: Es ist ein Polungswiderstand zwischen der Mitte der Stufenwicklung und der Lastableitung vorgesehen, der ständig oder nur während der Umschaltung kurzzeitig, vor Beginn der Vorwählerbetätigung, mittels eines In summary, the known prior art can be summarized in preselected with tap changers with poling circuit as follows: It is provided a polarity between the middle of the tap winding and the load dissipation, the constant or only during the switching briefly, before the start of Vorwählerbetätigung by means of a
Polungsschalters mit der Lastableitung verbunden ist. Dadurch wird die Stufenwicklung während der Vorwählerschaltung an ein definiertes Potential angelenkt. Polarity switch is connected to the load dissipation. Characterized the step winding is articulated during the preselection circuit to a defined potential.
Nachteilig bei diesen bekannten Lösungen ist, dass durch diese Polungsschaltung vom Vorwähler der unerwünschte kapazitive Strom geschaltet, d. h. unterbrochen wird; Lichtbögen sind dabei unvermeidlich. Diese Lichtbögen verursachen eine Gasbildung. Dies ist für zahlreiche Anwendungen unerwünscht, beispielsweise bei Ultra-Hochspannungsanwendungen. Mit steigender A disadvantage of these known solutions is that switched by this polarity of the selection of the unwanted capacitive current, d. H. is interrupted; Arcs are inevitable. These arcs cause gas formation. This is undesirable for many applications, such as ultra-high voltage applications. With rising
Systemspannung werden diese unerwünschten Gase immer störender. System voltage, these unwanted gases are increasingly disturbing.
Aufgabe der Erfindung ist es demnach, einen Stufenschalter mit einer verbesserten Polungsschaltung vorzusehen, die eine deutlich reduzierte Lichtbogenbildung am Vorwähler nach sich zieht. The object of the invention is therefore to provide a tap changer with an improved poling circuit, which entails a significantly reduced arcing at preselection.
Diese Aufgabe wird durch einen Stufenschalter der eingangs genannten Art mit den Merkmalen der nebengeordneten Patentansprüche 1 oder 2 gelöst. This object is achieved by a tap changer of the type mentioned with the features of the independent claims 1 or 2.
Die allgemeine erfinderische Idee, die für beide Ausführungsformen in den nebengeordneten Ansprüchen gilt, besteht darin, zwei separate Polungswiderstände vorzusehen die an den Anfang und an das Ende der Stufenwicklung angeschlossen sind. The general inventive idea, which applies to both embodiments in the independent claims, is to provide two separate polarity resistors which are connected to the beginning and to the end of the step winding.
Der wesentliche Vorteil beider Ausführungsformen der Erfindung besteht darin, dass die The essential advantage of both embodiments of the invention is that the
erfindungsgemäß vorgesehenen beiden Polungswiderstände einen Bypass für den kapazitiven Strom bilden; der kapazitive Strom kommutiert von einer Seite auf die andere Seite - er muss, abweichend vom Stand der Technik, vom Vorwähler nicht abgeschaltet, d. h. unterbrochen werden. In der Folge ergibt sich eine deutlich geringere Lichtbogenbildung. According to the invention provided for two polarity resistors form a bypass for the capacitive current; the capacitive current commutes from one side to the other side - unlike the state of the art, it does not have to be switched off by the preselector, ie. H. to be interrupted. As a result, significantly less arcing occurs.
Die Erfindung soll nachfolgend an Hand von Zeichnungen noch näher erläutert werden. Es zeigen: The invention will be explained in more detail below with reference to drawings. Show it:
Figur 1 eine Anordnung nach dem Stand der Technik Figure 1 shows an arrangement according to the prior art
Figur 2 eine erste Ausführungsform der Erfindung gemäß Patentanspruch 1 Figur 3 eine zweite Ausführungsform der Erfindung gemäß Patentanspruch 2. 2 shows a first embodiment of the invention according to claim 1 3 shows a second embodiment of the invention according to claim 2.
Zunächst soll an Hand von Figur 1 noch einmal der bekannte Stand der Technik einer First, with reference to Figure 1 again the known prior art
Polungsanordnung erläutert werden. Gezeigt ist eine Stammwicklung 1 und eine Stufenwicklung 2 eines Stufentransformators. An der Stufenwicklung 2 ist ein Stufenschalter angeschlossen, der einen Wähler 3 besitzt. Der Wähler 3 wählt vor einer Umschaltung zunächst leistungslos die neue Pole arrangement will be explained. Shown is a main winding 1 and a tap winding 2 of a tapped transformer. At the tap winding 2, a tap changer is connected, which has a voter 3. The selector 3 first selects the new one before switching
Wicklungsanzapfung der Stufenwicklung 2 vor, auf die umgeschaltet werden soll. Die Umschaltung selbst erfolgt durch einen bekannten Lastumschalter 4 des Stufenschalters, auf den hier nicht näher eingegangen werden soll. Weiterhin weist der Stufenschalter einen Vorwähler 5 auf, durch den zur Vergrößerung des Regelbereiches Anfang oder Ende der Stufenwicklung 2 an das Ende der Winding tap the step winding 2 before, to be switched to. The switching itself is done by a known diverter switch 4 of the tap changer, which will not be discussed in detail here. Furthermore, the tap changer has a preselector 5, by the beginning or end of the tap winding 2 to the end of the. To increase the control range
Stammwicklung 1 geschaltet werden können. Die eigentliche Polungsschaltung besteht aus einem an die Mitte 6 der Stufenwicklung 2 angelenkten Polungswiderstand 7, der entweder direkt mit der Lastableitung 9 verbunden ist oder, wie hier gezeigt, über einen Polungsschalter 8 nur kurzzeitig mit der Lastableitung 9 verbunden ist. Main winding 1 can be switched. The actual poling circuit consists of a to the center 6 of the tap winding 2 hinged polarity resistor 7, which is either directly connected to the load discharge line 9 or, as shown here, via a polarity switch 8 is only briefly connected to the load discharge 9.
Die ständige Anlenkung des Polungswiderstandes 7 - obwohl er nur während der Umschaltung benötigt wird - verursacht zusätzliche Transformatorenverluste, weswegen in vielen Fällen ein Polungsschalter 8 in die Polungsschaltung eingefügt ist.  The permanent articulation of the polarity resistor 7 - although it is needed only during the switching - causes additional transformer losses, which is why in many cases a polarity switch 8 is inserted into the polarity circuit.
Figur 2 zeigt eine erste Ausführungsform der Erfindung; gleiche Bauteile sind mit gleichen Figure 2 shows a first embodiment of the invention; same components are the same
Bezugszeichen versehen. Abweichend vom Stand der Technik ist erfindungsgemäß am Anfang 10 der Stufenwicklung 2 ein erster Polungswiderstand 11 vorgesehen, der mittels eines ersten Provided with reference numerals. Deviating from the prior art, a first polarity resistor 11 is provided according to the invention at the beginning of the step winding 10 2, the means of a first
Polungsschalters 12 mit der Lastableitung in Verbindung steht. Erfindungsgemäß ist weiterhin am Ende 13 der Stufenwicklung 2 ein zweiter Polungswiderstand 14 vorgesehen, der über einen zweiten Polungsschalter 15 wiederum mit der Lastableitung 9 in Verbindung steht. Die beiden Polungsschalter 12, 15 werden nur kurzzeitig vor Beginn der Betätigung des Vorwählers 5 eingeschaltet, so dass nur kurzzeitig der Anfang 10 und das Ende 13 der Stufenwicklung 2 an ein definiertes Potential angelenkt werden. Polungsschalters 12 is in communication with the load dissipation. According to the invention, a second polarity resistor 14 is further provided at the end 13 of the step winding 2, which is in turn connected to the load discharge line 9 via a second polarity switch 15. The two polarity switches 12, 15 are only briefly turned on before the start of the operation of the preselector 5, so that only briefly the beginning 10 and the end 13 of the tap winding 2 are hinged to a defined potential.
Figur 3 zeigt eine zweite Ausführungsform der Erfindung, bei der keine Polungsschalter vorgesehen sind. Vielmehr sind hier fest und dauernd am Anfang 10 der Stufenwicklung 2 ein erster Figure 3 shows a second embodiment of the invention in which no polarity switches are provided. Rather, here are solid and permanently at the beginning of the 10 stage winding 2 a first
Polungswiderstand 11 und am Ende 13 der Stufenwicklung 2 ein zweiter Polungswiderstand 14 angelenkt. Bei dieser Ausführungsform der Erfindung ist der mechanische Aufwand geringer, da, wie erläutert, separate Polungsschalter wegfallen; im Gegenzug müssen die nachteiligen höheren Verluste durch die dauernde Einschaltung der Polungswiderstände 11 , 14 hingenommen werden. Polungswiderstand 11 and at the end 13 of the tap winding 2, a second polarity resistor 14 hinged. In this embodiment of the invention, the mechanical complexity is lower because, as explained, separate polarity switch omitted; in return, the disadvantageous higher losses must be accepted by the continuous switching of the poling resistors 11, 14.
Letztendlich ist es im Rahmen der Erfindung eine Ermessensfrage für welche der beiden Varianten man sich entscheidet. Beide Ausführungsformen lassen sich bei einphasigen Stufenschaltern ohne großen Aufwand realisieren. Auf besonders vorteilhafte Weise können bei beiden Ausführungsformen die Polungswiderstände 11 , 14 unsymmetrisch ausgelegt werden, so dass die spezifischen Polungsbedingungen am jeweiligen Transformator auf einfache Weise justiert bzw. vergleichmäßigt werden können. Ultimately, it is within the scope of the invention, a discretionary question for which of the two variants one decides. Both embodiments can be realized in single-phase tap changers without much effort. In a particularly advantageous manner, the polarity resistors 11, 14 can be designed asymmetrically in both embodiments, so that the specific polarity conditions can be easily adjusted or evened out on the respective transformer.

Claims

Patentansprüche claims
1. Mit Vorwähler versehener Stufenschalter mit Polungsschaltung zur unterbrechungslosen 1. With selector stage tap with poling circuit for uninterrupted
Regelung an einem Regeltransformator, wobei der Regeltransformator eine oder mehrere  Control on a control transformer, wherein the control transformer one or more
Stammwicklungen (1 ) und eine Stufenwicklung (2) aufweist,  Has trunk windings (1) and a step winding (2),
wobei der Stufenschalter zwischen verschiedenen Wicklungsanzapfungen der Stufenwicklung (2) schaltbar ist, die jeweils mit einer Lastableitung (9) verbindbar sind  wherein the tap changer between different winding taps of the tap winding (2) is switchable, which are each connectable to a load discharge (9)
und wobei eine Polungsschaltung vorgesehen ist, derart, dass die Stufenwicklung (2) während der Umschaltung von einer Wicklungsanzapfung auf eine andere Wicklungsanzapfung an die  and wherein a polarity circuit is provided, such that the step winding (2) during the changeover from one winding tap to another winding tap to the
Lastableitung (9) anlenkbar ist,  Load derivation (9) is articulated,
dadurch gekennzeichnet,  characterized,
dass am Anfang (10) der Stufenwicklung (2) ein erster Polungswiderstand (11 ) vorgesehen ist, der über einen ersten Polungsschalters (12) mit der Lastableitung (9) in Verbindung steht  a first polarity resistor (11) is provided at the beginning (10) of the tap winding (2), which is connected to the load discharge line (9) via a first polarity switch (12)
und dass am Ende (13) der Stufenwicklung (2) ein zweiter Polungswiderstand (14) vorgesehen ist, der über einen zweiten Polungsschalter (15) wiederum mit der Lastableitung (9) in Verbindung steht.  and that at the end (13) of the step winding (2), a second polarity resistor (14) is provided, which in turn via a second polarity switch (15) with the load discharge (9) is in communication.
2. Mit Vorwähler versehener Stufenschalter mit Polungsschaltung zur unterbrechungslosen 2. With selector stage tap with poling circuit for uninterrupted
Regelung an einem Regeltransformator, wobei der Regeltransformator eine oder mehrere  Control on a control transformer, wherein the control transformer one or more
Stammwicklungen (1 ) und eine Stufenwicklung (2) aufweist,  Has trunk windings (1) and a step winding (2),
wobei der Stufenschalter zwischen verschiedenen Wicklungsanzapfungen der Stufenwicklung (2) schaltbar ist, die jeweils mit einer Lastableitung (9) verbindbar sind  wherein the tap changer between different winding taps of the tap winding (2) is switchable, which are each connectable to a load discharge (9)
und wobei eine Polungsschaltung vorgesehen ist, derart, dass die Stufenwicklung (2) während der Umschaltung von einer Wicklungsanzapfung auf eine andere Wicklungsanzapfung an die  and wherein a polarity circuit is provided, such that the step winding (2) during the changeover from one winding tap to another winding tap to the
Lastableitung (9) anlenkbar ist,  Load derivation (9) is articulated,
dadurch gekennzeichnet,  characterized,
dass am Anfang (10) der Stufenwicklung (2) ein erster Polungswiderstand (11 ) vorgesehen ist, der mit der Lastableitung (9) in Verbindung steht  in that at the beginning (10) of the tap winding (2) a first polarity resistor (11) is provided, which is connected to the load discharge (9)
und dass am Ende (13) der Stufenwicklung (2) ein zweiter Polungswiderstand (14) vorgesehen ist, der wiederum mit der Lastableitung (9) in Verbindung steht.  and that at the end (13) of the tap winding (2), a second Polungswiderstand (14) is provided, which in turn communicates with the load discharge (9).
3. Stufenschalter nach Anspruch 1 oder 2, 3. tap changer according to claim 1 or 2,
dadurch gekennzeichnet,  characterized,
dass die beiden Polungswiderstände (11 , 14) unterschiedliche elektrische Werte aufweisen.  the two polarity resistors (11, 14) have different electrical values.
EP10776582.8A 2009-12-23 2010-11-02 Tap changer with polarity switch for control transformer Active EP2517216B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009060132A DE102009060132B3 (en) 2009-12-23 2009-12-23 Tap changer with polarity switch on a control transformer
PCT/EP2010/006665 WO2011076309A1 (en) 2009-12-23 2010-11-02 Step switch comprising a polarity switch for a variable transformer

Publications (2)

Publication Number Publication Date
EP2517216A1 true EP2517216A1 (en) 2012-10-31
EP2517216B1 EP2517216B1 (en) 2013-10-23

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP10776582.8A Active EP2517216B1 (en) 2009-12-23 2010-11-02 Tap changer with polarity switch for control transformer

Country Status (8)

Country Link
US (1) US8576038B2 (en)
EP (1) EP2517216B1 (en)
JP (1) JP2013516051A (en)
KR (1) KR20120103574A (en)
CN (1) CN102667975B (en)
DE (1) DE102009060132B3 (en)
HK (1) HK1173553A1 (en)
WO (1) WO2011076309A1 (en)

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US8576038B2 (en) 2013-11-05
HK1173553A1 (en) 2013-05-16
WO2011076309A1 (en) 2011-06-30
DE102009060132B3 (en) 2011-05-12
CN102667975B (en) 2015-05-06
KR20120103574A (en) 2012-09-19
US20120249277A1 (en) 2012-10-04
CN102667975A (en) 2012-09-12
JP2013516051A (en) 2013-05-09
EP2517216B1 (en) 2013-10-23

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