EP1932162A1 - Mechanical switching contact - Google Patents

Mechanical switching contact

Info

Publication number
EP1932162A1
EP1932162A1 EP06776344A EP06776344A EP1932162A1 EP 1932162 A1 EP1932162 A1 EP 1932162A1 EP 06776344 A EP06776344 A EP 06776344A EP 06776344 A EP06776344 A EP 06776344A EP 1932162 A1 EP1932162 A1 EP 1932162A1
Authority
EP
European Patent Office
Prior art keywords
contact
switching
mechanical switching
shift lever
contacts
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP06776344A
Other languages
German (de)
French (fr)
Other versions
EP1932162B1 (en
Inventor
Günter Kloth
Silke Wrede
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 EP1932162A1 publication Critical patent/EP1932162A1/en
Application granted granted Critical
Publication of EP1932162B1 publication Critical patent/EP1932162B1/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
    • 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

Definitions

  • the invention relates to a mechanical switching contact for switching in a diverter switch of a tap changer.
  • a mechanical switching contact for double-pole break for a tap changer is known from DE-PS 100 50 821 C1.
  • the known mechanical switching contact has an insulating material carrier on which fixed contacts are arranged, which have spherically shaped contact areas. Furthermore, a contact carrier is rotatably mounted on this insulating carrier, which is in communication with a pivotable about a certain angle pivot arm. At the free end of the pivot arm, a contact piece is attached, which in turn has contact rollers at its two ends. These contact rollers make it possible to connect the fixed contacts. Depending on the position of the swivel arm, the contact rollers impinge on the spherical surface of corresponding, oppositely arranged fixed contacts and electrically connect them to one another.
  • the object of the invention is therefore to provide a mechanical switching contact that allows a reliable, secure, bounce and arc-free switching or contact even at high currents.
  • Figure 1 shows a mechanical switching contact according to the invention in perspective
  • Figure 4 is a shift lever of the switching contact alone
  • Figure 5 is a contact housing of the switching contact alone
  • FIG. 6 shows a schematic illustration of the interaction of the shift lever
  • FIG. 7 shows a combination of two switching contacts according to the invention according to Figure 1 as a single-phase assembly for main switching contact and
  • Resistance switching contact of a tap changer Figure 8 shows a circuit of a diverter switch a tap changer, as can be realized by mechanical switching contacts according to the invention.
  • the shift lever 2 which is again shown alone in Figure 4, is rotatably mounted by means of a bearing 21 on the bearing 16 of the insulating substrate 1. He has a pivot arm 22 which is pivotable about the bearing 21 and in turn has a driver 23 at its free end. Laterally in the Swivel arm 22 are two abutment mounts 24 are provided, which are formed dome-shaped and also serve to support the still to be described compression springs 8. At its other, opposite free end, the shift lever 2 on a fork-shaped actuating contour 25.
  • the contact housing 3 which is again shown alone in Figure 5, has a driving opening 31, in which the driver 23 of the shift lever 2 engages.
  • the contact housing 3 further comprises a contact receptacle 32 with spring guide 33 on which parallel contact fingers 9, 10, which are held by a bearing pin 35, are fixed.
  • the contact housing 3 is mounted by means of a bearing 34 and the bearing pin 35 on the bearing 17 of the insulating substrate 1 pivotally.
  • the parallel contact fingers 9, 10 fastened to it enable the respective fixed contacts 4, 5 or slide on the one-piece design Contact rail 6. It can be seen that the two contact fingers 9, 10 enclose the respective fixed contact on both sides.
  • the present in such parallel contact fingers contact springs to generate the necessary contact pressure are omitted here for clarity.
  • the illustrated components act according to the invention as a spatial 3-D gearbox.
  • FIG. 7 shows two of these switching contacts according to the invention, which are combined to form a complete mechanical switching unit for one phase of a diverter switch.
  • the one switching contact I acts as the main switching contact and the other switching contact Il as Resistance switching contact.
  • Identical parts are provided with the same reference numerals; It can be seen that both modules are constructed completely identical. For reasons of clarity, not all of the details explained have been provided with reference numerals in this representation; In addition to the components already described, electrical connection lines 7 are also indicated here.
  • the compression springs 8 are clearly visible, each located between a Kalottenage 18 of Isolierstoffehrs 1 and a dome-shaped abutment 24 of the shift lever 2.
  • FIG. 8 shows the electrical circuit of a tap changer, which can be realized with the arrangement of two switching contacts explained in FIG.
  • the selector of the tap changer is shown schematically, which makes a powerless preselection of the new winding tapping n + 1, to be switched to, while still the previous winding tap n is electrically connected.
  • the contacts MCA and MCD are the respective permanent main contacts, one of which is closed in stationary operation and thus energized.
  • MSV designates a vacuum switching cell in the main switching branch, TTV a vacuum switching cell in the resistance branch, which has the additional switching resistance R.
  • the dotted lines show the part of the circuit that is technically realized by the two mechanical switching contacts I and II according to the invention.
  • the acting as the main switching contact switching contact Il is referred to as MTF, as
  • Resistance switching contact acting mechanical switching contact I is referred to as TTF.
  • Y denotes the load derivation.

Landscapes

  • Contacts (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Switches With Compound Operations (AREA)
  • Slide Switches (AREA)
  • Push-Button Switches (AREA)
  • Mechanisms For Operating Contacts (AREA)
  • Keying Circuit Devices (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Tumbler Switches (AREA)

Abstract

The device has an insulating support on which fixed contacts (3,4) are arranged, a switch lever (2) rotatably mounted on the support with pivot arms (22) on both ends and an actuating profile on the lower end, whereby the arm can be suddenly pivoted between its stationary states under an acting force. A pivotable contact housing also mounted on the support via a separate bearing has two parallel electrically connected contact fingers enclosing the fixed contacts and is mechanically connected to an actuated by the pivot lever.

Description

Mechanischer SchaltkontaktMechanical switching contact
Die Erfindung betrifft einen mechanischen Schaltkontakt zur Umschaltung bei einem Lastumschalter eines Stufenschalters.The invention relates to a mechanical switching contact for switching in a diverter switch of a tap changer.
Ein mechanischer Schaltkontakt zur doppelpoligen Unterbrechung für einen Stufenschalter ist aus der DE-PS 100 50 821 C1 bekannt. Der bekannte mechanische Schaltkontakt weist einen Isolierstoffträger auf, an dem feste Kontakte angeordnet sind, die ballig geformte Kontaktbereiche besitzen. Weiterhin ist an diesem Isolierstoffträger ein Kontaktträger drehbar gelagert, der mit einem um einen bestimmten Winkel verschwenkbaren Schwenkarm in Verbindung steht. Am freien Ende des Schwenkarmes ist ein Kontaktstück befestigt, das seinerseits an seinen beiden Enden Kontaktrollen aufweist. Durch diese Kontaktrollen sind die festen Kontakte wahlweise beschaltbar. Je nach Lage des Schwenkarmes treffen die Kontaktrollen auf die ballige Oberfläche korrespondierender, gegenüberliegend angeordneter fester Kontakte auf und verbinden diese elektrisch miteinander.A mechanical switching contact for double-pole break for a tap changer is known from DE-PS 100 50 821 C1. The known mechanical switching contact has an insulating material carrier on which fixed contacts are arranged, which have spherically shaped contact areas. Furthermore, a contact carrier is rotatably mounted on this insulating carrier, which is in communication with a pivotable about a certain angle pivot arm. At the free end of the pivot arm, a contact piece is attached, which in turn has contact rollers at its two ends. These contact rollers make it possible to connect the fixed contacts. Depending on the position of the swivel arm, the contact rollers impinge on the spherical surface of corresponding, oppositely arranged fixed contacts and electrically connect them to one another.
Dieser mechanische Schaltkontakt hat sich im praktischen Einsatz bewährt, bei der doppelpoligen Unterbrechung sehr hoher Ströme weist er jedoch Nachteile auf. Zum einen kann bei der beschriebenen konstruktiven Ausbildung der ballig geformten festen Kontakte und der schwenkbaren Kontaktrollen ein unerwünschtes Kontaktprellen auftreten, zum anderen ergeben sich bei dieser doppelpolig unterbrechenden Konstruktion hohe Stromkräfte, die den Anpressdruck der Kontaktrollen auf den jeweiligen festen Kontakt reduzieren. Dies ist durch den physikalischen Effekt begründet, dass in Folge der Stromeinschnürung an den Engstellen eines Flächenkontaktes abhebende Kräfte auftreten.This mechanical switching contact has proven itself in practical use, in the double-pole interruption of very high currents, however, it has disadvantages. On the one hand, in the described structural design of the spherical shaped fixed contacts and the pivotal contact rollers undesirable contact bounce occur, on the other hand result in this double-pole interrupting construction high current forces that reduce the contact pressure of the contact rollers on the respective fixed contact. This is due to the physical effect that, as a result of Stromeinschnürung occur at the bottlenecks of a surface contact lifting forces.
Aufgabe der Erfindung ist es demnach, einen mechanischen Schaltkontakt anzugeben, der auch bei hohen Strömen eine zuverlässige, sichere, prell- und lichtbogenfreie Umschaltung bzw. Kontaktgabe gestattet.The object of the invention is therefore to provide a mechanical switching contact that allows a reliable, secure, bounce and arc-free switching or contact even at high currents.
Diese Aufgabe wird durch einen mechanischen Schaltkontakt mit den Merkmalen des ersten Patentanspruches gelöst. Die Unteransprüche betreffen besonders vorteilhafte Weiterbildungen der Erfindung.This object is achieved by a mechanical switching contact with the features of the first claim. The subclaims relate to particularly advantageous developments of the invention.
Durch die erfindungsgemäße Ausbildung der beweglichen Kontakte als Kontaktfinger, die die jeweiligen festen Kontakte beidseitig umschließen, wird zunächst einmal eine Kontaktprellung verringert. Es ergibt sich weiterhin bei der erfindungsgemäßen Lösung ein hoher, gleichbleibender Kontaktdruck. Die Erfindung soll nachfolgend an Hand von Zeichnungen beispielhaft noch näher erläutert werden.The inventive design of the movable contacts as contact fingers which enclose the respective fixed contacts on both sides, a contact bruise is initially reduced. It also results in the inventive solution, a high, constant contact pressure. The invention will be explained in more detail by way of example with reference to drawings.
Es zeigen:Show it:
Figur 1 einen erfindungsgemäßen mechanischen Schaltkontakt in perspektivischerFigure 1 shows a mechanical switching contact according to the invention in perspective
Darstellung, komplett Figur 2 diesen mechanischen Schaltkontakt mit abgenommenem Oberteil des noch zu erläuternden IsolierstoffträgersRepresentation, complete Figure 2 shows this mechanical switching contact with removed top of the still to be explained Isolierstoffträgers
Figur 3 diesen Isolierstoffträger allein ohne montierte weitere BauteileFigure 3 shows this Isolierstoffträger alone without mounted other components
Figur 4 einen Schalthebel des Schaltkontaktes alleinFigure 4 is a shift lever of the switching contact alone
Figur 5 ein Kontaktgehäuse des Schaltkontaktes alleinFigure 5 is a contact housing of the switching contact alone
Figur 6 eine schematische Darstellung des Zusammenwirkens von Schalthebel,FIG. 6 shows a schematic illustration of the interaction of the shift lever,
Kontaktgehäuse sowie Kontakten des erfindungsgemäßen Schaltkontaktes Figur 7 eine Kombination von zwei erfindungsgemäßen Schaltkontakten gemäß Figur 1 als einheitliche einphasige Baugruppe für Hauptschaltkontakt undContact housing and contacts of the switching contact according to the invention Figure 7 shows a combination of two switching contacts according to the invention according to Figure 1 as a single-phase assembly for main switching contact and
Widerstandsschaltkontakt eines Stufenschalters Figur 8 eine Schaltung eines Lastumschalters eines Stufenschalters, wie sie durch erfindungsgemäße mechanische Schaltkontakte realisierbar ist.Resistance switching contact of a tap changer Figure 8 shows a circuit of a diverter switch a tap changer, as can be realized by mechanical switching contacts according to the invention.
Zunächst soll der in den Figuren 1 und 2 dargestellte mechanische Schaltkontakt gemäß der Erfindung näher erläutert werden. Er weist einen zweiteiligen Isolierstoffträger 1 auf, der die weiteren, im Nachfolgenden beschriebene Bauteile aufnimmt und die gesamte Anordnung umschließt. In Figur 2 ist der obere Teil des zweiteiligen Isolierstoffträgers 1 weggelassen, um die im Inneren befindlichen Bauteile besser darstellen zu können. Der Isolierstoffträger 1 ist mit in jeweils einem angeformten Schaft verlaufenden Längsbohrungen 11...14 versehen, auf die weiter unten noch näher eingegangen wird. Im Bereich einer weiteren Längsbohrung 15 ist ein Lager 16 vorgesehen, in dem ein Schalthebel 2 mittels eines hier nicht dargestellten Lagerbolzens drehbar gelagert ist. Seitlich ist ein weiteres Lager 17 angeordnet, das ein Kontaktgehäuse 3 aufnimmt, das weiter unten noch näher beschrieben werden wird. Schließlich sind am Isolierstoffträger 1 noch Kalottenaufnahmen 18 vorgesehen, in denen sich Druckfedern 8 abstützen, die später ebenfalls noch beschrieben werden. Am Isolierstoffträger 1 sind zwei gegenüberliegende feste Kontakte 4, 5 sowie eine Kontaktschiene 6 angeordnet.First, the illustrated in Figures 1 and 2 mechanical switching contact according to the invention will be explained in more detail. It has a two-part insulating carrier 1, which receives the other components described below and encloses the entire assembly. In Figure 2, the upper part of the two-part Isolierstoffträgers 1 is omitted in order to better represent the components located inside. The Isolierstoffträger 1 is provided with extending in each case an integrally formed shank longitudinal bores 11 ... 14, which will be discussed in more detail below. In the region of a further longitudinal bore 15, a bearing 16 is provided, in which a shift lever 2 is rotatably supported by means of a bearing pin, not shown here. Laterally, another bearing 17 is arranged, which receives a contact housing 3, which will be described in more detail below. Finally, on the insulating substrate 1 still Kalottenaufnahmen 18 are provided in which compression springs 8 are supported, which will also be described later. On the insulating substrate 1, two opposite fixed contacts 4, 5 and a contact rail 6 are arranged.
In Figur 3 ist der beschriebene Isolierstoffträger noch einmal separat dargestellt.In Figure 3, the described Isolierstoffträger is shown separately again.
Der Schalthebel 2, der in Figur 4 noch einmal allein gezeigt ist, ist mittels eines Lagers 21 am Lager 16 des Isolierstoffträgers 1 drehbar befestigt. Er weist einen Schwenkarm 22 auf, der um das Lager 21 verschwenkbar ist und seinerseits einen Mitnehmer 23 an seinem freien Ende besitzt. Seitlich im Schwenkarm 22 sind zwei Widerlageraufnahmen 24 vorgesehen, die kalottenförmig ausgebildet sind und ebenfalls zur Abstützung der noch zu beschreibenden Druckfedern 8 dienen. An seinem anderen, gegenüberliegenden freien Ende weist der Schalthebel 2 eine gabelförmige Betätigungskontur 25 auf.The shift lever 2, which is again shown alone in Figure 4, is rotatably mounted by means of a bearing 21 on the bearing 16 of the insulating substrate 1. He has a pivot arm 22 which is pivotable about the bearing 21 and in turn has a driver 23 at its free end. Laterally in the Swivel arm 22 are two abutment mounts 24 are provided, which are formed dome-shaped and also serve to support the still to be described compression springs 8. At its other, opposite free end, the shift lever 2 on a fork-shaped actuating contour 25.
Das Kontaktgehäuse 3, das in Figur 5 noch einmal allein gezeigt ist, besitzt eine Mitnehmeröffnung 31 , in die der Mitnehmer 23 des Schalthebels 2 eingreift. Das Kontaktgehäuse 3 weist weiterhin eine Kontaktaufnahme 32 mit Federführung 33 auf, woran parallel angeordnete Kontaktfinger 9, 10, die durch einen Lagerbolzen 35 gehalten sind, befestigt sind. Das Kontaktgehäuse 3 ist mittels eines Lagers 34 und des Lagerbolzens 35 am Lager 17 des Isolierstoffträgers 1 verschwenkbar gelagert.The contact housing 3, which is again shown alone in Figure 5, has a driving opening 31, in which the driver 23 of the shift lever 2 engages. The contact housing 3 further comprises a contact receptacle 32 with spring guide 33 on which parallel contact fingers 9, 10, which are held by a bearing pin 35, are fixed. The contact housing 3 is mounted by means of a bearing 34 and the bearing pin 35 on the bearing 17 of the insulating substrate 1 pivotally.
In Figur 6 ist noch einmal das Zusammenspiel von Schalthebel 2, Kontaktgehäuse 3, sowie den Kontaktfingern 9, 10 gezeigt. In dieser Darstellung ist die Kontaktschiene 6 durchgehend ausgebildet, d. h. einstückig. Dies ist im Rahmen der Erfindung vorteilhaft, aber kein notwendiges Merkmal; genauso gut können statt einer solchen Kontaktschiene separate Kontakte, ebenso wie die Kontakte 4 und 5, als getrennte Kontaktstücke ausgebildet sein. An Hand dieser Figur soll die Wirkungsweise des erfindungsgemäßen mechanischen Schaltkontaktes erläutert werden: Wird bei der Betätigung des Lastumschalters eine Rolle o. dgl. in die Betätigungskontur 25 des Schalthebels 2 bewegt und läuft auf dieser auf, so wird der gesamte Schalthebel 2 um sein Lager 21 verschwenkt. Sein Mitnehmer 23, der in der Mitnehmeröffnung 31 des Kontaktgehäuses 3 formschlüssig geführt ist, verschwenkt dieses Kontaktgehäuses 3 um dessen Lager 34. Damit beschälten die daran befestigten parallelen Kontaktfinger 9, 10 die jeweiligen festen Kontakte 4, 5 bzw. gleiten auf der hier einstückig ausgebildeten Kontaktschiene 6. Es ist zu sehen, dass die beiden Kontaktfinger 9, 10 den jeweiligen festen Kontakt beidseitig umschließen. Die bei solchen parallelen Kontaktfingern vorhandenen Kontaktfedern zum Erzeugung des notwendigen Kontaktdruckes sind hier aus Gründen der Übersichtlichkeit weggelassen. Die erläuterten Bauteile wirken erfindungsgemäß als räumliches 3-D- Getriebe.In Figure 6, the interaction of the shift lever 2, contact housing 3, and the contact fingers 9, 10 is shown again. In this illustration, the contact rail 6 is formed continuously, d. H. integrally. This is advantageous in the context of the invention, but not a necessary feature; just as well, instead of such a contact rail, separate contacts, as well as the contacts 4 and 5, may be formed as separate contact pieces. On the basis of this figure, the operation of the mechanical switching contact according to the invention will be explained: If during the operation of the diverter switch a role o. The like. In the operating contour 25 of the shift lever 2 moves and runs on this, the entire shift lever 2 is about its bearing 21st pivoted. Its driver 23, which is positively guided in the cam opening 31 of the contact housing 3, pivots this contact housing 3 about its bearing 34. Thus, the parallel contact fingers 9, 10 fastened to it enable the respective fixed contacts 4, 5 or slide on the one-piece design Contact rail 6. It can be seen that the two contact fingers 9, 10 enclose the respective fixed contact on both sides. The present in such parallel contact fingers contact springs to generate the necessary contact pressure are omitted here for clarity. The illustrated components act according to the invention as a spatial 3-D gearbox.
Dabei wird der physikalische Effekt der Wirkung der Stromkräfte ausgenutzt: Liegen zwei Leitungen parallel und werden sie gleichzeitig in entgegengesetzter Richtung vom Strom durchflössen, so stoßen sie sich gegenseitig ab, bei gleicher Stromrichtung hingegen ziehen sie sich an. Dieser physikalische Effekt des Sichanziehens wird hier durch die beiden parallelen Kontaktfinger 9, 10, die den jeweiligen festen Kontakt beidseitig umschließen und in gleicher Stromrichtung durchflössen sind, in Verbindung mit dem beschriebenen 3-D-Getriebe zu ihrer Betätigung realisiert. Dies ist ein wesentlicher Vorteil der Erfindung gegenüber dem Stand der Technik.The physical effect of the effect of the current forces is exploited: If two lines are parallel and flowed through in the opposite direction from the stream, they repel each other, with the same current direction, however, they attract each other. This physical effect of self-tightening is realized here by the two parallel contact fingers 9, 10, which surround the respective fixed contact on both sides and are flowed through in the same current direction, in connection with the described 3-D transmission for their operation. This is a significant advantage of the invention over the prior art.
In Figur 7 sind zwei dieser erfindungsgemäßen Schaltkontakte gezeigt, die zu einer kompletten mechanischen Schalteinheit für eine Phase eines Lastumschalters zusammengefasst sind. Hierbei wirkt der eine Schaltkontakt I als Hauptschaltkontakt und der andere Schaltkontakt Il als Widerstandsschaltkontakt. Gleiche Teile sind mit gleichen Bezugszeichen versehen; es ist zu erkennen, dass beide Module völlig identisch aufgebaut sind. Aus Gründen der Übersichtlichkeit sind in dieser Darstellung nicht alle der erläuterten Details mit Bezugszeichen versehen worden; zusätzlich zu den bereits erläuterten Bauteilen sind hier noch elektrische Anschlussleitungen 7 angedeutet. In dieser Figur sind die Druckfedern 8 gut zu erkennen, die sich jeweils zwischen einer Kalottenaufnahme 18 des Isolierstoffträgers 1 und einem kalottenförmigen Widerlager 24 des Schalthebels 2 befinden. Durch diese Druckfedern 8 wird eine Schnappwirkung erzielt; der jeweilige Schalthebel 2 wird gegen die Kraft der vorgespannten Druckfeder 8 verschwenkt und gelangt nach Überschreiten des Totpunktes zuverlässig in die andere Endposition. Beide Module sind, wie bereits erläutert, grundsätzlich identisch, es ist jedoch möglich und in vielen Fällen sinnvoll, die Betätigungskonturen 25 der beiden Schalthebel 2 unterschiedlich zu gestalten, um die Schaltfolge und -geschwindigkeit zu variieren.FIG. 7 shows two of these switching contacts according to the invention, which are combined to form a complete mechanical switching unit for one phase of a diverter switch. Here, the one switching contact I acts as the main switching contact and the other switching contact Il as Resistance switching contact. Identical parts are provided with the same reference numerals; It can be seen that both modules are constructed completely identical. For reasons of clarity, not all of the details explained have been provided with reference numerals in this representation; In addition to the components already described, electrical connection lines 7 are also indicated here. In this figure, the compression springs 8 are clearly visible, each located between a Kalottenaufnahme 18 of Isolierstoffträgers 1 and a dome-shaped abutment 24 of the shift lever 2. By this compression springs 8 a snap effect is achieved; the respective shift lever 2 is pivoted against the force of the prestressed compression spring 8 and reaches after exceeding the dead center reliably in the other end position. Both modules are, as already explained, basically identical, but it is possible and in many cases useful to make the actuation contours 25 of the two shifter 2 different to vary the switching sequence and speed.
In Figur 8 ist die elektrische Schaltung eines Stufenschalters gezeigt, die mit der in Figur 7 erläuterten Anordnung von zwei Schaltkontakten realisierbar ist. Im oberen Bereich der Schaltung ist der Wähler des Stufenschalters schematisch dargestellt, der eine leistungslose Vorwahl der neuen Wicklungsanzapfung n+1 , auf die umgeschaltet werden soll, vornimmt, während noch die bisherige Wicklungsanzapfung n elektrisch geschaltet ist. Darunter sind die beiden Seiten des Lastumschalters A und B, zwischen denen anschließend eine unterbrechungslose Umschaltung unter Last erfolgen soll, gezeigt. Die Kontakte MCA und MCD sind die jeweiligen Dauerhauptkontakte, von denen einer im stationären Betrieb geschlossen und damit stromführend ist. MSV bezeichnet eine Vakuumschaltzelle im Hauptschaltzweig, TTV eine Vakuumschaltzelle im Widerstandszweig, der den zusätzlichen Überschaltwiderstand R aufweist. Die strichlierten Linien zeigen den Teil der Schaltung, der von den erfindungsgemäßen beiden mechanischen Schaltkontakten I bzw. Il technisch realisiert wird. Der als Hauptschaltkontakt wirkende Schaltkontakt Il ist als MTF bezeichnet, der alsFIG. 8 shows the electrical circuit of a tap changer, which can be realized with the arrangement of two switching contacts explained in FIG. In the upper part of the circuit, the selector of the tap changer is shown schematically, which makes a powerless preselection of the new winding tapping n + 1, to be switched to, while still the previous winding tap n is electrically connected. Below these are the two sides of the diverter switch A and B, between which subsequently an uninterrupted changeover under load is to take place. The contacts MCA and MCD are the respective permanent main contacts, one of which is closed in stationary operation and thus energized. MSV designates a vacuum switching cell in the main switching branch, TTV a vacuum switching cell in the resistance branch, which has the additional switching resistance R. The dotted lines show the part of the circuit that is technically realized by the two mechanical switching contacts I and II according to the invention. The acting as the main switching contact switching contact Il is referred to as MTF, as
Widerstandsschaltkontakt wirkende mechanische Schaltkontakt I ist als TTF bezeichnet. Y bezeichnet die Lastableitung. Resistance switching contact acting mechanical switching contact I is referred to as TTF. Y denotes the load derivation.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
1 Isolierstoffträger1 insulating carrier
11 Längsbohrung11 longitudinal bore
12 Längsbohrung12 longitudinal bore
13 Längsbohrung13 longitudinal bore
14 Längsbohrung14 longitudinal bore
15 Längsbohrung15 longitudinal bore
16 Lager16 bearings
17 weiteres Lager17 more camp
18 Kalottenaufnahme18 spherical cap
2 Schalthebel2 shifters
21 Lager21 bearings
22 Schwenkarm22 swivel arm
23 Mitnehmer23 drivers
24 kalottenförmiges Widerlager24 dome-shaped abutment
25 Betätigungskontur, gabelförmig25 actuating contour, forked
3 Kontaktgehäuse3 contact housing
31 Mitnehmeröffnung31 Mitnehmeröffnung
32 Kontaktaufnahme32 contact
33 Federführung33 spring guide
34 Lager34 bearings
35 Lagerbolzen35 bearing bolts
4 fester Kontakt4 fixed contact
5 fester Kontakt5 fixed contact
6 Kontaktschiene6 contact rail
7 Anschlussleitung7 connecting cable
8 Druckfeder8 compression spring
9 Kontaktfinger9 contact fingers
10 Kontaktfinger 10 contact fingers

Claims

Patentansprüche claims
1. Mechanischer Schaltkontakt zur Umschaltung, insbesondere bei einem Laststufenschalter, wobei ein Isolierstoffträger (1 ) vorgesehen ist, an dem feste, beschaltbare Kontakte (4, 5, 6) angeordnet sind, wobei am Isolierstoffträger (1 ) ein Schalthebel (2) drehbar gelagert ist, der an einem seiner beiden freien Enden einen Schwenkarm (22) und am anderen freien Ende eine1. Mechanical switching contact for switching, in particular for an on-load tap-changer, wherein an insulating carrier (1) is provided on which fixed, connectable contacts (4, 5, 6) are arranged, wherein a switching lever (2) is rotatably mounted on the insulating carrier (1) is, at one of its two free ends a pivot arm (22) and at the other free end one
Betätigungskontur (25) aufweist und wobei der Schalthebel (2) bei Krafteinwirkung auf die Betätigungskontur (25) sprungartig von einem seiner beiden stationären Zustände in den jeweils anderen sprungartig verschwenkbar ist, dadurch gekennzeichnet, dass am Isolierstoffträger (1 ) zusätzlich ein um ein separates Lager (34) verschwenkbaresActuation contour (25) and wherein the shift lever (2) upon application of force to the actuating contour (25) is abruptly pivotally jumped from one of its two stationary states in the other, characterized in that the Isolierstoffträger (1) in addition to a separate warehouse (34) pivotable
Kontaktgehäuse (3) gelagert ist, dass das Kontaktgehäuse (3) zwei parallele, elektrisch miteinander verbundene KontaktfingerContact housing (3) is mounted, that the contact housing (3) has two parallel, electrically interconnected contact fingers
(9, 10) trägt, die die jeweils beschalteten festen Kontakte (4, 5, 6) beidseitig umschließen und dass das Kontaktgehäuse (3) mit dem Schalthebel (2) mechanisch in Verbindung steht und von diesem betätigbar ist.(9, 10) carries, which enclose the respectively connected fixed contacts (4, 5, 6) on both sides and that the contact housing (3) with the shift lever (2) is mechanically connected to and actuated by the latter.
2. Mechanischer Schaltkontakt nach Anspruch 1 , dadurch gekennzeichnet, dass der Schalthebel (2) einen Mitnehmer (23) aufweist, der formschlüssig in eine Mitnehmeröffnung (31 ) des Kontaktgehäuses (3) eingreift.2. Mechanical switching contact according to claim 1, characterized in that the shift lever (2) has a driver (23) which engages positively in a driving opening (31) of the contact housing (3).
3. Mechanischer Schaltkontakt nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass einer der festen Kontakte als Kontaktschiene (6) ausgebildet ist, auf der die Kontaktfinger (9, 10) bei Bewegung des Kontaktgehäuses (3) gleiten. 3. Mechanical switching contact according to claim 1 or 2, characterized in that one of the fixed contacts as a contact rail (6) is formed, on which the contact fingers (9, 10) on movement of the contact housing (3) slide.
EP06776344A 2005-10-08 2006-07-22 Mechanical switching contact Not-in-force EP1932162B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005048308A DE102005048308B3 (en) 2005-10-08 2005-10-08 Mechanical switch contact has pivotable contact housing mounted on insulating support via bearing with two parallel electrically connected contact fingers enclosing fixed contacts and mechanically connected to and actuated by pivot lever
PCT/EP2006/007230 WO2007042088A1 (en) 2005-10-08 2006-07-22 Mechanical switching contact

Publications (2)

Publication Number Publication Date
EP1932162A1 true EP1932162A1 (en) 2008-06-18
EP1932162B1 EP1932162B1 (en) 2008-12-03

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Application Number Title Priority Date Filing Date
EP06776344A Not-in-force EP1932162B1 (en) 2005-10-08 2006-07-22 Mechanical switching contact

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US (1) US7683282B2 (en)
EP (1) EP1932162B1 (en)
JP (1) JP4879272B2 (en)
KR (1) KR101227624B1 (en)
CN (1) CN101080793B (en)
AT (1) ATE416469T1 (en)
BR (1) BRPI0606416B1 (en)
DE (2) DE102005048308B3 (en)
ES (1) ES2316090T3 (en)
HK (1) HK1116916A1 (en)
RU (1) RU2399981C2 (en)
UA (1) UA91378C2 (en)
WO (1) WO2007042088A1 (en)

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WO2011085763A1 (en) 2010-01-16 2011-07-21 Maschinenfabrik Reinhausen Gmbh Method for measuring the switching time of an on-load tap changer and circuit for measuring switching time
DE102010015051B4 (en) 2010-04-15 2012-06-14 Maschinenfabrik Reinhausen Gmbh Mechanical switching contact
DE102010019948B4 (en) * 2010-05-08 2015-06-11 Maschinenfabrik Reinhausen Gmbh OLTC
DE202010017792U1 (en) 2010-11-02 2012-09-11 Maschinenfabrik Reinhausen Gmbh Mechanical switch for an on-load tap-changer
CN108807031B (en) * 2018-06-28 2024-05-14 山东泰开电力设备有限公司 Change-over switch device applied to switching of tapping switch circuit
CN109599276B (en) * 2018-12-16 2022-08-26 山西汾西重工有限责任公司 Anti-jitter opening and closing method based on swing rod type limit signal switch
CN110047663B (en) * 2019-05-05 2020-06-23 江苏吉野电气有限公司 Electromagnetic switch

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Also Published As

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BRPI0606416A2 (en) 2009-12-01
US7683282B2 (en) 2010-03-23
DE502006002283D1 (en) 2009-01-15
ATE416469T1 (en) 2008-12-15
HK1116916A1 (en) 2009-01-02
US20080128257A1 (en) 2008-06-05
WO2007042088A1 (en) 2007-04-19
EP1932162B1 (en) 2008-12-03
JP2009512123A (en) 2009-03-19
DE102005048308B3 (en) 2006-11-23
BRPI0606416B1 (en) 2019-05-07
RU2008118228A (en) 2009-11-20
KR20080068842A (en) 2008-07-24
UA91378C2 (en) 2010-07-26
CN101080793A (en) 2007-11-28
ES2316090T3 (en) 2009-04-01
RU2399981C2 (en) 2010-09-20
CN101080793B (en) 2010-07-21
KR101227624B1 (en) 2013-01-30
JP4879272B2 (en) 2012-02-22

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