EP0546283B1 - Polarity switch for tap selector - Google Patents

Polarity switch for tap selector Download PDF

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Publication number
EP0546283B1
EP0546283B1 EP92117773A EP92117773A EP0546283B1 EP 0546283 B1 EP0546283 B1 EP 0546283B1 EP 92117773 A EP92117773 A EP 92117773A EP 92117773 A EP92117773 A EP 92117773A EP 0546283 B1 EP0546283 B1 EP 0546283B1
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EP
European Patent Office
Prior art keywords
polarity
contact
selector
insulating material
fixed
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.)
Expired - Lifetime
Application number
EP92117773A
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German (de)
French (fr)
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EP0546283A2 (en
EP0546283A3 (en
Inventor
Heinrich Dipl.-Ing. Freymüller (FH)
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
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Publication of EP0546283A2 publication Critical patent/EP0546283A2/en
Publication of EP0546283A3 publication Critical patent/EP0546283A3/en
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Publication of EP0546283B1 publication Critical patent/EP0546283B1/en
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    • 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 polarity switch for tap changers of tap changers according to one of the preambles of the independent claims 1 or 2.
  • the step winding of a step transformer is briefly galvanically separated from the main winding during its switchover by a turner or coarse selector. In doing so, it assumes a potential that results from the voltages of the neighboring windings and the coupling capacitances to these windings or to grounded parts.
  • the resulting differential voltages are sometimes quite considerable; they take up the switching distance of the opening preselector contacts and can lead to inadmissible discharge phenomena if the height is sufficient.
  • polarity switches which hold the step winding at a desired and defined potential by means of an ohmic resistor, which is only switched on during the switching phase of the preselector or inverter.
  • Such polarity switches are, as is known from DE-PS 19 42 567, arranged coaxially to the preselection and fine selector contact systems of the tap changer below the tap selector or they are, as is known from DE-PS 28 15 736, on insulating rods attached to additional cantilevers to the side the actual step selector or the selection.
  • a special gear is required which converts the rotary movement of the selector column into a pivoting movement for actuating the polarity switch.
  • the object of the invention is to provide a polarity switch, which can be accommodated in the step selector in a space-saving manner, without significantly influencing its length or scope and without to make a separate gear train necessary for its operation.
  • This object is achieved by a polarity switch with the features of the independent claims 1 or 2.
  • the subclaims contain advantageous developments of the invention.
  • the particular advantage of the polarity switch according to the invention is, in particular, that, due to the approximately horizontal arrangement of the shield ring acting as a movable contact, it only requires a small overall height and is therefore particularly space-saving, particularly advantageous between the selector or turner and fine selector or with a lateral selector or turner can be accommodated below or above the fine selector.
  • the direct actuation of the switching shield ring by means of a groove-like control contour on the drive tube eliminates the need for a separate gearbox on the one hand, and the design or dimensioning of this control contour in a simple manner offers numerous possibilities for adapting the polarity switch to different selector switching angles or different opening and closing speeds and - characteristics by varying the entry angle of the control cam in the control contour.
  • the shield ring which serves as a movable polarity contact, ensures very good voltage properties within the entire tap changer arrangement.
  • the selector here consists of a selector shell 1, for example a GRP pipe or a cylindrical insulating material frame.
  • a selector shell 1 In a first horizontal plane I, the fixed turner or preselector contacts 2 are arranged in the turner shell 1, in a second horizontal plane II there is the polarity switch to be explained in more detail below, and finally, in at least one further horizontal plane III, the fine selector contacts 3 are arranged underneath.
  • concentric drive shafts 4, 5 which connect the respective fixed contacts of the turner or preselector 2 or the fine selector 3 with the respective contact lead, which is also not shown, in a known manner by means of contact bridges or the like, not shown.
  • the Geneva gear mechanism for generating a rotary movement of the drive shaft 4 for actuating the turner or preselector when the fine selector has run through all contacts.
  • the polarity switch according to the invention is located in the horizontal plane II. This essentially consists of a fixed, spring-loaded polarity contact 6 in the turner shell 1, a bearing 7 on the opposite side inside the turner shell 1, which carries a shield ring 8 acting as a movable polarity contact, and a control contour 9 on the drive shaft 5.
  • the fixedly arranged in the turner shell 1 bearing 7 allows in a manner not shown, for. B.
  • the shield ring 8 is guided by a guide arm 10 firmly connected to it, which carries at its free end a guide roller 11 which in turn runs in the control contour 9 and is guided by it.
  • the fixed polarity contact 6 is spring-loaded so that it can be pushed slightly horizontally outwards; outside the turner shell 1, it is connected to a polarity resistor known per se.
  • the shield ring 8 itself is connected either by the directly electrically conductive bearing 7 or additional contact means to an outer connection 12 which is articulated to the star point or, in the case of turrets, to the 0 contact of the tap changer.
  • Fig. 2a shows the development of a control contour 9 in detail for a selector with 2 x 360 ° rotary movement of the drive shaft 5, ie a fine selector, in which the preselector is actuated after each full rotation of the drive shaft 5 shall be.
  • the control contour 9 has an upward bulge; it carries the guide roller 11 of the guide arm 10 and thus pivots the shield ring 8 with its free end upward, so that it meets the fixed polarity contact 6 with it.
  • the shield ring 8 - as can be seen - leaves the fixed polarity contact 6 again at the switch-off point 9.2 and is pivoted downward.
  • the choice of the respective control contour 9 makes it possible in a simple manner to adapt the switching behavior of the polarity switch to the respective angle of rotation of the drive shaft 5 of the fine selector and the swivel angle between the turner or preselector contacts 2.
  • the dimensioning of the distance between switch-on point 9.1 and switch-off point 9.2 adapts to the switching time of the preselector. When the direction of rotation of the fine selector is reversed, switch-on point 9.1 and switch-off point 9.2 are swapped accordingly.
  • the shield ring 8 is held in the closed contact state by the fixed polarity contact 6; for this purpose, it is expedient to move the pivot point 7.2 horizontally relative to the plane of the fixed polarity contact 6 and / or to design the control contour 9 so that the shield ring 8 rests at the upper end of the fixed polarity contact 6 in the switched, ie fully deflected state, and is held by this.
  • the spring force of the polarity contact 6 must first be overcome, ie it must be pressed slightly outwards.
  • the control contour 9 is advantageously realized by an annular component which supports it on the end face and is firmly connected to the drive shaft 5, but it is also conceivable to provide the control contour 9 on or in the drive shaft 5 itself.
  • control contour 9 on the drive shaft of the turner or preselector 4, in which case, if this drive shaft 4 does not describe a complete rotation of 360 °, the control contour 9 also only extends over part of the development becomes.
  • the guide arm 10 is designed to be vertically resilient, so that even in the case of a rigid, unsprung polarity contact 6, the required contact pressure is ensured when the shield ring 8 comes up on the underside of the polarity contact 6.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Keying Circuit Devices (AREA)
  • Circuit Breakers (AREA)
  • Electronic Switches (AREA)
  • Breakers (AREA)
  • Stereo-Broadcasting Methods (AREA)

Abstract

A step-transformer selector has a generally cylindrical drum centered on an axis and provided with an annular array of selector contacts and, axially offset therefrom, with at least one polarity contact offset axially from the selector contacts. A selector shaft extends along the axis in the drum and rotatable about the axis to connect to selected ones of the selector contacts. A polarity switch having a pivot in the drum offset from the axis and a ring can rock in the drum on the pivot between a connecting position touching and connecting to the polarity contact and an out-of-service position offset from and out of contact with the polarity contact. A cam on the shaft engages a follower on the ring for rocking the ring from its out-of-service position into its connecting position at least once during each rotation of the shaft about the axis.

Description

Die Erfindung betrifft einen Polungsschalter für Stufenwähler von Stufenschaltern gemäß einem der Oberbegriffe der nebengeordneten Patentansprüche 1 oder 2.The invention relates to a polarity switch for tap changers of tap changers according to one of the preambles of the independent claims 1 or 2.

Die Stufenwicklung eines Stufentransformators wird während ihrer Umschaltung durch Wender oder Grobwähler kurzzeitig galvanisch von der Stammwicklung getrennt. Dabei nimmt sie ein Potential an, daß sich aus den Spannungen der Nachbarwicklungen sowie den Kopplungskapazitäten zu diesen Wicklungen bzw. zu geerdeten Teilen ergibt.
Die dadurch entstehenden Differenzspannungen sind teilweise ganz erheblich; sie beanspruchen die Schaltstrecke der sich öffnenden Vorwählerkontakte und können bei entsprechender Höhe zu unzulässigen Entladungserscheinungen führen.The step winding of a step transformer is briefly galvanically separated from the main winding during its switchover by a turner or coarse selector. In doing so, it assumes a potential that results from the voltages of the neighboring windings and the coupling capacitances to these windings or to grounded parts.
The resulting differential voltages are sometimes quite considerable; they take up the switching distance of the opening preselector contacts and can lead to inadmissible discharge phenomena if the height is sufficient.

Zur Beseitigung dieser unerwünschten Differenzspannungen sind Polungsschalter bekannt, die die Stufenwicklung durch einen ohmschen Widerstand, der nur während der Umschaltphase des Vorwählers oder Wenders eingeschaltet wird, an einem gewünschten und definierten Potential halten.
Solche Polungsschalter sind, wie aus DE-PS 19 42 567 bekannt, koaxial zu den Vorwahl- und Feinwählerkontaktsystemen des Stufenschalters unterhalb des Stufenwählers angeordnet oder sie befinden sich, wie aus DE-PS 28 15 736 bekannt, auf an zusätzlichen Auslegern befestigten Isolierstäben seitlich neben dem eigentlichen Stufenwähler bzw. dem Vorwähler.
Im ersten Fall ergeben sich unerwünscht große Baulängen für den Stufenwähler, im zweiten Fall ebenso unerwünschte große horizontale Ausdehnungen des gesamten Stufenschalters.
Bei beiden bekannten Anordnungen des Polungsschalters ist weiterhin nachteilig, daß ein besonderes Getriebe erforderlich ist, das die Drehbewegung der Wählersäule jeweils in eine Schwenkbewegung zur Betätigung des Polungsschalters umsetzt.To eliminate these undesirable differential voltages, polarity switches are known which hold the step winding at a desired and defined potential by means of an ohmic resistor, which is only switched on during the switching phase of the preselector or inverter.
Such polarity switches are, as is known from DE-PS 19 42 567, arranged coaxially to the preselection and fine selector contact systems of the tap changer below the tap selector or they are, as is known from DE-PS 28 15 736, on insulating rods attached to additional cantilevers to the side the actual step selector or the selection.
In the first case there are undesirably large lengths for the tap changer, in the second case there are also undesirable large horizontal dimensions of the entire tap changer.
In both known arrangements of the polarity switch, it is also disadvantageous that a special gear is required which converts the rotary movement of the selector column into a pivoting movement for actuating the polarity switch.

Die Aufgabe der Erfindung besteht nun darin, einen Polungsschalter zu schaffen, der auf platzsparende Weise im Stufenwähler mituntergebracht werden kann, ohne dessen Baulänge oder Umfang wesentlich zu beeinflussen und ohne einen gesonderten Getriebezug zu seiner Betätigung erforderlich zu machen. Diese Aufgabe wird erfindungsgemäß durch einen Polungsschalter mit den Merkmalen der nebengeordneten Patentansprüche 1 oder 2 gelöst. Die Unteransprüche beinhalten vorteilhafte Weiterbildungen der Erfindung.The object of the invention is to provide a polarity switch, which can be accommodated in the step selector in a space-saving manner, without significantly influencing its length or scope and without to make a separate gear train necessary for its operation. This object is achieved by a polarity switch with the features of the independent claims 1 or 2. The subclaims contain advantageous developments of the invention.

Der besondere Vorteil des erfindungsgemäßen Polungsschalters liegt insbesondere darin, daß er, bedingt durch die annähernd horizontale Anordnung des als beweglicher Kontakt wirkenden Schirmringes, eine nur geringe Bauhöhe beansprucht und dadurch platzsparend besonders vorteilhaft zwischen Vorwähler bzw. Wender und Feinwähler oder bei seitlichem Vorwähler bzw. Wender unter- bzw. oberhalb des Feinwählers untergebracht werden kann.
Durch die direkte Betätigung des schaltenden Schirmringes durch eine nutartige Steuerkontur auf dem Antriebsrohr entfällt einerseits ein separates Getriebe, andererseits bietet die Gestaltung bzw. Dimensionierung dieser Steuerkontur auf einfache Weise zahlreiche Möglichkeiten, den Polungsschalter an verschiedene Wählerschaltwinkel anzupassen bzw. verschiedene Öffnungs- und Schließgeschwindigkeiten und -charakteristika durch Variation des Einlaufwinkels der Steuernocke in der Steuerkontur vorzusehen. Schließlich gewährleistet der als beweglicher Polungskontakt dienende Schirmring sehr gute Spannungseigenschaften innerhalb der gesamten Stufenwähleranordnung.The particular advantage of the polarity switch according to the invention is, in particular, that, due to the approximately horizontal arrangement of the shield ring acting as a movable contact, it only requires a small overall height and is therefore particularly space-saving, particularly advantageous between the selector or turner and fine selector or with a lateral selector or turner can be accommodated below or above the fine selector.
The direct actuation of the switching shield ring by means of a groove-like control contour on the drive tube eliminates the need for a separate gearbox on the one hand, and the design or dimensioning of this control contour in a simple manner offers numerous possibilities for adapting the polarity switch to different selector switching angles or different opening and closing speeds and - characteristics by varying the entry angle of the control cam in the control contour. Finally, the shield ring, which serves as a movable polarity contact, ensures very good voltage properties within the entire tap changer arrangement.

Die Erfindung soll nachstehend anhand von Zeichnungen beispielhaft näher erläutert werden.
Es zeigen:

Fig. 1
den erfindungsgemäßen Polungsschalter in seitlicher schematischer Schnittdarstellung,
Fig. 2a
eine erste Abwicklung der Steuerkurve auf dem Feinwählerantriebsrohr,
Fig. 2b
eine zweite Abwicklung einer modifizierten Steuerkurve mit unterschiedlicher Schließ- bzw. Öffnungscharakteristik.
The invention will be explained in more detail below with reference to drawings.
Show it:
Fig. 1
the polarity switch according to the invention in a lateral schematic sectional view,
Fig. 2a
a first development of the control curve on the precision selector drive tube,
Fig. 2b
a second handling of a modified control curve with different closing or opening characteristics.

Der Wähler besteht hierbei aus einer Wählerschale 1, beispielsweise einem GFK-Rohr oder einem zylindrischen Isolierstoffgerüst. In einer ersten horizontalen Ebene I sind in der Wenderschale 1 die festen Wender bzw. Vorwählerkontakte 2 angeordnet, in einer zweiten horizontalen Ebene II befindet sich darunter der anschließend näher zu erläuternde Polungsschalter und schließlich sind wiederum darunter in mindestens einer weiteren horizontalen Ebene III die Feinwählerkontakte 3 angeordnet.
Im Inneren der Wählerschale 1 befinden sich konzentrische Antriebswellen 4, 5, die auf bekannte Weise mittels nicht dargestellter Kontaktbrücken oder dergleichen die jeweiligen Festkontakte des Wenders oder Vorwählers 2 bzw. des Feinwählers 3 mit der jeweiligen Kontaktableitung, die ebenfalls nicht dargestellt ist, verbinden. Nicht dargestellt ist ferner, das bekannte Malteserradgetriebe zur Erzeugung einer Drehbewegung der Antriebswelle 4 zur Betätigung des Wenders oder Vorwählers, wenn der Feinwähler alle Kontakte durchlaufen hat.
In der horizontalen Ebene II befindet sich, wie ausgeführt, der erfindungsgemäße Polungsschalter. Dieser besteht im wesentlichen aus einem festen, gefederten Polungskontakt 6 in der Wenderschale 1, einem Lager 7 auf der entgegengesetzten Seite im Inneren der Wenderschale 1, das einen als beweglicher Polungskontakt wirkenden Schirmring 8 trägt und einer Steuerkontur 9 auf der Antriebswelle 5.
Das in der Wenderschale 1 fest angeordnete Lager 7 ermöglicht auf nicht näher dargestellt Weise, z. B. mittels eines horizontalen Querbolzens 7.1, eine vertikale Schwenkbewegung des annähernd horizontalen, einseitig angelenkten Schirmringes 8 um einen Drehpunkt 7.2 in der angegebenen Pfeilrichtung. Geführt wird der Schirmring 8 dabei durch einen fest mit ihm verbundenen Führungsarm 10, der an seinem freien Ende eine Führungsrolle 11 trägt, die wiederum in der Steuerkontur 9 läuft und von ihr geführt wird.
Der feste Polungskontakt 6 ist gefedert, so daß er geringfügig horizontal nach außen drückbar ist; außerhalb der Wenderschale 1 ist er mit einem an sich bekannten Polungswiderstand verbunden.
Der Schirmring 8 selbst ist entweder durch das direkt elektrisch leitende Lager 7 oder zusätzliche Kontaktmittel mit einem äußeren Anschluß 12 verbunden, der an den Sternpunkt oder bei Wendern auch an den 0-Kontakt des Stufenschalters angelenkt ist.The selector here consists of a selector shell 1, for example a GRP pipe or a cylindrical insulating material frame. In a first horizontal plane I, the fixed turner or preselector contacts 2 are arranged in the turner shell 1, in a second horizontal plane II there is the polarity switch to be explained in more detail below, and finally, in at least one further horizontal plane III, the fine selector contacts 3 are arranged underneath.
Inside the selector shell 1 there are concentric drive shafts 4, 5, which connect the respective fixed contacts of the turner or preselector 2 or the fine selector 3 with the respective contact lead, which is also not shown, in a known manner by means of contact bridges or the like, not shown. Also not shown is the known Geneva gear mechanism for generating a rotary movement of the drive shaft 4 for actuating the turner or preselector when the fine selector has run through all contacts.
As stated, the polarity switch according to the invention is located in the horizontal plane II. This essentially consists of a fixed, spring-loaded polarity contact 6 in the turner shell 1, a bearing 7 on the opposite side inside the turner shell 1, which carries a shield ring 8 acting as a movable polarity contact, and a control contour 9 on the drive shaft 5.
The fixedly arranged in the turner shell 1 bearing 7 allows in a manner not shown, for. B. by means of a horizontal cross pin 7.1, a vertical pivoting movement of the approximately horizontal, one-sided hinged shield ring 8 about a pivot point 7.2 in the direction of the arrow. The shield ring 8 is guided by a guide arm 10 firmly connected to it, which carries at its free end a guide roller 11 which in turn runs in the control contour 9 and is guided by it.
The fixed polarity contact 6 is spring-loaded so that it can be pushed slightly horizontally outwards; outside the turner shell 1, it is connected to a polarity resistor known per se.
The shield ring 8 itself is connected either by the directly electrically conductive bearing 7 or additional contact means to an outer connection 12 which is articulated to the star point or, in the case of turrets, to the 0 contact of the tap changer.

Fig. 2a zeigt die Abwicklung einer Steuerkontur 9 im Detail für einen Wähler mit 2 x 360° Drehbewegung der Antriebswelle 5, einen Feinwähler also, bei dem nach jeweils einer vollen Drehung der Antriebswelle 5 der Vorwähler betätigt werden soll. Genau an diesem Einschaltpunkt 9.1 weist die Steuerkontur 9 eine Ausbuchtung nach oben auf; sie führt die Führungsrolle 11 des Führungsarmes 10 mit und verschwenkt damit den Schirmring 8 mit seinem freien Ende nach oben, so daß er mit diesem auf den festen Polungskontakt 6 trifft. Beim Weiterschalten um einen bestimmten Winkel verläßt der Schirmring 8 - wie ersichtlich - beim Abschaltpunkt 9.2 wieder den festen Polungskontakt 6 und wird nach unten verschwenkt.Fig. 2a shows the development of a control contour 9 in detail for a selector with 2 x 360 ° rotary movement of the drive shaft 5, ie a fine selector, in which the preselector is actuated after each full rotation of the drive shaft 5 shall be. Exactly at this switch-on point 9.1, the control contour 9 has an upward bulge; it carries the guide roller 11 of the guide arm 10 and thus pivots the shield ring 8 with its free end upward, so that it meets the fixed polarity contact 6 with it. When switching through a certain angle, the shield ring 8 - as can be seen - leaves the fixed polarity contact 6 again at the switch-off point 9.2 and is pivoted downward.

Durch die Wahl der jeweiligen Steuerkontur 9 ist auf einfache Weise eine Anpassung des Schaltverhaltens des Polungsschalters an den jeweiligen Drehwinkel der Antriebswelle 5 des Feinwählers und den Schwenkwinkel zwischen den Wender- bzw. Vorwählerkontakten 2 möglich. Durch die Dimensionierung der Steigung, d.h. des Einlaufwinkels, ist die Öffnungs- bzw.
Schließgeschwindigkeit variierbar. Durch die Dimensionierung des Abstandes zwischen Einschaltpunkt 9.1 und Abschaltpunkt 9.2 erfolgt die Anpassung an die Schaltzeit des Vorwählers. Bei Umkehrung der Drehrichtung des Feinwählers werden Einschaltpunkt 9.1 und Abschaltpunkt 9.2 entsprechend vertauscht.The choice of the respective control contour 9 makes it possible in a simple manner to adapt the switching behavior of the polarity switch to the respective angle of rotation of the drive shaft 5 of the fine selector and the swivel angle between the turner or preselector contacts 2. By dimensioning the slope, ie the inlet angle, the opening or
Closing speed variable. The dimensioning of the distance between switch-on point 9.1 and switch-off point 9.2 adapts to the switching time of the preselector. When the direction of rotation of the fine selector is reversed, switch-on point 9.1 and switch-off point 9.2 are swapped accordingly.

Fig. 2b zeigt die Abwicklung einer modifizierten Steuerkontur 9, bei der die Öffnungskurve einen anderen, d.h. nicht parallelen, Verlauf relativ zur Schließkurve aufweist.
Damit lassen sich sowohl unterschiedliche Öffnungs- und Schließgeschwindigkeiten des Polungsschalters als auch von der Drehrichtung abhängige verschiedene Ein- und Abschaltpunkte einstellen. Bei solcher Ausführung wird der Schirmring 8 im geschlossenen Kontaktzustand vom festen Polungskontakt 6 gehalten; dazu ist es zweckmäßig, den Drehpunkt 7.2 horizontal relativ zur Ebene des festen Polungskontaktes 6 zu versetzen und/oder die Steuerkontur 9 so zu gestalten, daß der Schirmring 8 im geschalteten, d.h. voll nach oben ausgelenkten Zustand am oberen Ende des festen Polungskontaktes 6 aufliegt und von diesem gehalten wird. Zum Zurückschalten muß dann erst die Federkraft des Polungskontaktes 6 überwunden, d.h. dieser geringfügig nach außen gedrückt werden.2b shows the development of a modified control contour 9, in which the opening curve has a different, ie non-parallel, course relative to the closing curve.
This means that different opening and closing speeds of the polarity switch as well as different switch-on and switch-off points depending on the direction of rotation can be set. In such an embodiment, the shield ring 8 is held in the closed contact state by the fixed polarity contact 6; for this purpose, it is expedient to move the pivot point 7.2 horizontally relative to the plane of the fixed polarity contact 6 and / or to design the control contour 9 so that the shield ring 8 rests at the upper end of the fixed polarity contact 6 in the switched, ie fully deflected state, and is held by this. To switch back, the spring force of the polarity contact 6 must first be overcome, ie it must be pressed slightly outwards.

Die Steuerkontur 9 wird vorteilhafterweise durch ein sie an der Stirnseite tragendes ringförmiges Bauteil realisiert, das mit der Antriebswelle 5 fest verbunden ist, es ist jedoch auch denkbar, die Steuerkontur 9 auf oder in der Antriebswelle 5 selbst vorzusehen.The control contour 9 is advantageously realized by an annular component which supports it on the end face and is firmly connected to the drive shaft 5, but it is also conceivable to provide the control contour 9 on or in the drive shaft 5 itself.

Es ist ferner in Abwandlung der Erfindung auch möglich, die Steuerkontur 9 auf der Antriebswelle des Wenders bzw. Vorwählers 4 vorzusehen, wobei dann, falls diese Antriebswelle 4 keine vollständige Drehung von 360° beschreibt, auch die Steuerkontur 9 nur über einen Teil der Abwicklung reichen wird.It is also possible in a modification of the invention to provide the control contour 9 on the drive shaft of the turner or preselector 4, in which case, if this drive shaft 4 does not describe a complete rotation of 360 °, the control contour 9 also only extends over part of the development becomes.

Eine weitere mögliche Abwandlung der Erfindung besteht darin, daß der Führungsarm 10 vertikal federnd ausgebildet ist, so daß auch bei einem starren, ungefederten Polungskontakt 6 der erforderliche Kontaktdruck beim Auflaufen des Schirmringes 8 an der Unterseite des Polungskontaktes 6 gewährleistet ist.Another possible modification of the invention is that the guide arm 10 is designed to be vertically resilient, so that even in the case of a rigid, unsprung polarity contact 6, the required contact pressure is ensured when the shield ring 8 comes up on the underside of the polarity contact 6.

Claims (7)

  1. Polarity switch for tap selectors of tap switches at tapped transformers, wherein the tap selector comprises an insulating material casing, preferably in the form of a selector shell, in which the fixed preselector contacts or reverser contacts on the one hand as well as the fine selector contacts on the other hand are arranged circularly in several horizontal planes and are respectively selectable by movable contact bridges, which in turn are circularly swivellable by drive shafts in the interior, characterised thereby that at least one fixed polarity contact (6) is arranged in the insulating material casing (1) in an additional horizontal plane, that an electrically conductive screening ring (8) is mounted, as a movable polarity contact, at one side on the insulating material casing (1) at a bearing (7) to be vertically pivotable, that the screening ring (8) is connected with a guide roller (11) which runs in a groove-shaped.cam track (9) and that the cam track (9) is arranged on one of the drive shafts (4, 5) in such a manner that on rotation thereof the screening ring (8) is temporarily connected with the fixed polarity contact (6).
  2. Polarity switch for tap selectors of tap switches at tapped transformers, wherein the tap selector comprises an insulating material casing, preferably in the form of a selector shell, in which the fixed fine selector contacts are arranged circularly in one or more horizontal planes and in each plane are selectable by a respective movable contact bridge, which are circularly swivellable by respective drive shafts in the interior, and wherein fixed reverser contacts are arranged laterally adjacent to the actual tap selector in a further insulating material casing similarly in a horizontal plane and are selectable by a further contact bridge which in turn is circularly swivellable by a further drive shaft in the interior of the further insulating material casing, characterised thereby that at least one fixed polarity contact (6) is arranged in one insulating material casing (1) in an additional horizontal plane, that an electrically conductive screening ring (8) is mounted, as a movable polarity contact, at one side on this insulating material casing (1) at a bearing (7) to be vertically pivotable, that the screening ring (8) is fixedly connected with a guide roller (11) which runs in a groove-shaped cam track (9) and that the cam track (9) is arranged on the surface of one of the drive shafts (4, 5) in such a manner that on rotation thereof the screening ring (8) is temporarily connected with the fixed polarity contact (6).
  3. Polarity switch according to one of the preceding claims, characterised thereby that the fixed polarity contact (6) is constructed to be resilient in horizontal direction.
  4. Polarity switch according to one of the preceding claims, characterised thereby that the horizontal plane of the fixed polarity contact (6) is slightly offset relative to that of the bearing (7).
  5. Polarity switch according to one of the preceding claims, characterised thereby that an electrically conductive connection is producible by means of the bearing (7) between the screening ring (8) and the terminal (12) thereof at the outer side of the insulating material casing (1).
  6. Polarity switch according to one of the preceding claims, characterised thereby that the cam track (9) has different upper and lower part profiles, i.e. a closing cam extending non-parallelly to the opening cam.
  7. Polarity switch according to one of the preceding claims, characterised thereby that a guide arm (10) carrying the guide roller (11) is constructed to be vertically resilient.
EP92117773A 1991-12-13 1992-10-17 Polarity switch for tap selector Expired - Lifetime EP0546283B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4141142A DE4141142C1 (en) 1991-12-13 1991-12-13
DE4141142 1991-12-13

Publications (3)

Publication Number Publication Date
EP0546283A2 EP0546283A2 (en) 1993-06-16
EP0546283A3 EP0546283A3 (en) 1993-06-30
EP0546283B1 true EP0546283B1 (en) 1994-12-07

Family

ID=6446980

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92117773A Expired - Lifetime EP0546283B1 (en) 1991-12-13 1992-10-17 Polarity switch for tap selector

Country Status (9)

Country Link
US (1) US5315078A (en)
EP (1) EP0546283B1 (en)
JP (1) JP3424947B2 (en)
AT (1) ATE115327T1 (en)
BG (1) BG60735B1 (en)
CA (1) CA2085029C (en)
DE (2) DE4141142C1 (en)
HU (2) HU9203811D0 (en)
RO (1) RO113093B1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19542880C1 (en) * 1995-11-17 1997-02-20 Reinhausen Maschf Scheubeck Fixed pole contact for stage switch selector for tapped- or stage- transformer
DE10312176B3 (en) * 2003-03-19 2004-06-09 Maschinenfabrik Reinhausen Gmbh Load switch for stepping switch with 2 fixed main contact pairs for each current phase to be switched and cooperating movable main contact
DE102005027524B3 (en) * 2005-06-15 2006-10-12 Maschinenfabrik Reinhausen Gmbh Power accumulator for on-load tap changer, has lift and leaping carriages with three linear bearings, and cam follower coinciding with actuator such that leaping carriage is pushed into new final position by rotation of eccentric plate
JP4660313B2 (en) * 2005-08-02 2011-03-30 株式会社東芝 Mold coil tap changer
WO2010078292A1 (en) * 2008-12-29 2010-07-08 Abb Technology Ag An improved reversing switch and a method of retrofitting
DE102009025358B4 (en) 2009-06-18 2013-06-20 Maschinenfabrik Reinhausen Gmbh Tap changer with a selection
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
EP3996124A1 (en) * 2020-11-06 2022-05-11 ABB PG Power Grids Ltd Transformer comprising a load break rotary switch

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Publication number Priority date Publication date Assignee Title
DE1103434B (en) * 1960-03-02 1961-03-30 Licentia Gmbh High-voltage circuit breaker with a series-mounted voltage isolator
AT299393B (en) * 1969-08-21 1972-06-12 Reinhausen Maschf Scheubeck Switching arrangement for tap changers of three-phase transformers
DE2548408C3 (en) * 1975-10-29 1979-05-31 Maschinenfabrik Reinhausen Gebrueder Scheubeck Gmbh & Co Kg, 8400 Regensburg Step switch for step transformers consisting of diverter switch, step selector and preselector
SE402502B (en) * 1976-10-29 1978-07-03 Asea Ab WINDING COUPLER
US4174529A (en) * 1978-04-10 1979-11-13 General Electric Company Protective circuit for zinc oxide varistors
DE2815736C2 (en) * 1978-04-12 1980-05-29 Maschinenfabrik Reinhausen Gebrueder Scheubeck Gmbh & Co Kg, 8400 Regensburg Step switch with polarity contacts for step transformers
GB2077503B (en) * 1980-05-19 1984-10-03 Associated Tapechangers Ltd Tap changer for a transformer
AT386091B (en) * 1986-07-02 1988-06-27 Elin Union Ag SWITCHING ARRANGEMENT FOR THE CHANGEOVER SWITCH OF A LEVEL SWITCH FOR TRANSFORMERS
DE3829489C2 (en) * 1988-08-31 1993-11-18 Reinhausen Maschf Scheubeck Cylindrical step selector for step transformers
DE4011019C1 (en) * 1990-04-05 1991-12-05 Maschinenfabrik Reinhausen Gmbh, 8400 Regensburg, De
DE4034126C1 (en) * 1990-10-26 1992-03-05 Maschinenfabrik Reinhausen Gmbh, 8400 Regensburg, De

Also Published As

Publication number Publication date
JP3424947B2 (en) 2003-07-07
US5315078A (en) 1994-05-24
ATE115327T1 (en) 1994-12-15
HUT63014A (en) 1993-06-28
BG97164A (en) 1994-03-24
BG60735B1 (en) 1996-01-31
EP0546283A2 (en) 1993-06-16
HU9203811D0 (en) 1993-03-29
CA2085029C (en) 2002-10-29
EP0546283A3 (en) 1993-06-30
CA2085029A1 (en) 1993-06-14
DE4141142C1 (en) 1993-04-08
DE59200914D1 (en) 1995-01-19
HU209220B (en) 1994-03-28
RO113093B1 (en) 1998-03-30
JPH05267076A (en) 1993-10-15

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