EP2559042B1 - Mechanical switching contact - Google Patents
Mechanical switching contact Download PDFInfo
- Publication number
- EP2559042B1 EP2559042B1 EP11710116.2A EP11710116A EP2559042B1 EP 2559042 B1 EP2559042 B1 EP 2559042B1 EP 11710116 A EP11710116 A EP 11710116A EP 2559042 B1 EP2559042 B1 EP 2559042B1
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- European Patent Office
- Prior art keywords
- contact
- contact finger
- electrically conductive
- mechanical
- lever
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- 230000003111 delayed effect Effects 0.000 claims description 4
- 230000000712 assembly Effects 0.000 description 5
- 238000000429 assembly Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Images
Classifications
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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
- H01H9/0016—Contact arrangements for tap changers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/56—Contact arrangements for providing make-before-break operation, e.g. for on-load tap-changing
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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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/0005—Tap change devices
- H01H9/0044—Casings; Mountings; Disposition in transformer housing
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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
- H01H9/02—Bases, casings, or covers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2203/00—Form of contacts
- H01H2203/02—Interspersed fingers
Definitions
- the present invention relates to a mechanical switching contact for Umoder activation or for the separation of an electrical contact, in particular in a diverter switch a tap changer with the features of the independent claim.
- Known diverter switch for tap changers of control transformers usually have a so-called. Resistance Quick changeover, the switching contact shafts are controlled by a cam gear, which in turn is driven by a power storage. In this case, the cam moves in an oscillating movement between two end positions, regardless of the direction of movement of the selector. This means that the contacts, which have closed first in a first rotational direction of the cam, open in a return movement as the first. The contacts, which have opened in the same direction of rotation of the cam first, close last in the return movement.
- the DE 100 50 821 C1 discloses a mechanical switching contact for double pole break for a tap changer.
- the switching contact has a Isolierstoffdoi, are arranged on the fixed contacts, which are formed as spherically shaped contact areas.
- a contact carrier is further rotatably mounted, which is in communication with a pivotable about a certain angle arm.
- a contact piece is attached, which in turn has contact rollers at its two ends.
- Another mechanical switching contact for switching in an on-load tap-changer is from WO 2007/042088 A1 known. Also, this mechanical switching contact has an insulating material on which fixed, connectable contacts are arranged. Furthermore, a shift lever is rotatable on the insulating carrier mounted, which has at one of its two free ends a pivoting arm and at the other free end an actuating contour. The shift lever is pivotable upon application of force to the operating contour of one of its two stationary states in the other stationary state. On Isolierstoffong a pivotable about a separate bearing contact housing is additionally mounted, which carries two parallel, electrically interconnected contact fingers, which surround the respectively connected fixed contacts on both sides. The contact housing is connected to the shift lever in a mechanical connection and is actuated by this.
- the shift lever may further comprise a driver which engages positively in a driving opening of the contact housing.
- One of the two fixed contacts can optionally be designed as a contact rail on which the contact fingers slide during movements of the contact housing.
- the actuating mechanisms for known mechanical switching contacts for switching in on-load tap-changers have in common that switching takes place between two end positions, so that oscillating switching movements are required.
- the WO 89108924 A discloses a spring-jump drive for diverter switch of tap changers whose storage spring is tensioned by a drive, the shaft rotates either clockwise or counterclockwise, wherein a driven by the storage spring during the switching operation element for the contact movement performs a rotational movement.
- the element for contact movement may be, for example, a cam or a link control.
- the accumulator spring and the driven element are connected to a coupling element which is rotatable only in one direction, regardless of the direction of rotation of the drive.
- This known spring jump drive is used for contact sequence control and should be particularly suitable for thyristor diverter switch.
- the DE1613646A1 describes a diverter switch with movable contact pieces, which are each movably connected via contact carrier with a double lever.
- a cam roller is attached on the double lever. This corresponds to a groove-shaped curve on a cam.
- the cam roller is moved over the curve, leading to a deflection of the double lever and thus leads to closing or opening of the contact pieces.
- An object of the present invention is to propose a reliable mechanical switching contact, which allows a mechanically and electrically secure contact between two end positions and regardless of a direction of rotation of an actuating shaft.
- the present invention proposes a mechanical switching contact for making contact, contact separation or switching, which can be used in particular in an on-load tap changer of a tapped transformer.
- the mechanical switching contact has at least two independently movable, in each case pivotable between two end positions, electrically interconnected contacts or contact assemblies or Kunststofffingerwee, which are operatively connected via multi-lever joints with a rotatable switching shaft, the circulating guide slots for actuating the multi-lever joints and coupled thereto Deflection of the contacts or contact assemblies has.
- This mechanical switching contact is designed as a disconnector or switch and is used for reliable and mechanically and electrically highly resilient switching, eg. In a tapped transformer.
- the two pivotable contacts or contact finger packages are preferably mounted on an electrically conductive common axis, which is arranged parallel to the rotatable switching shaft.
- the contacts or contact finger pacts may also be stored deviating therefrom, for example perpendicular to the axis.
- Each of the two pivotable contact assemblies or contact finger packets is still a separate mechanical, electrically conductive, trained as a contact stop for forming the respective switched end positions of the circuit breaker, disconnector or switch assigned.
- the mechanical switching contact according to the invention provides a reliable working electrical isolation or changeover switch whose shift fingers are forcibly driven via a rotating cam slot or disc and therefore can be controlled very accurately and reliably, according to the curve design regardless of the direction of rotation of the cam or disc.
- it is particularly advantageous if no oscillating drive, but a rotating, possibly even direction-independent actuating movement for the disconnector or switch can be used, as for example.
- tap changers or load switches o. The like. In the high current range is the case ,
- the first contact assembly or the first contact finger package in a first end position of the mechanical switching contact its electrically conductive mechanical stop abuts and establishes an electrically conductive connection between the electrically conductive common axis and the stop, while the second contact assembly or the second contact finger packet is lifted from the associated electrically conductive mechanical stop.
- the two contact finger packets By independently pivoting the two contact finger packets it can be ensured that a switching effect without simultaneous contacting of both connections to be switched is made possible.
- the first contact finger packet in the second end position of the mechanical switching contact is lifted from the associated electrically conductive mechanical stop, while the second contact finger packet rests against the associated electrically conductive mechanical stop and establishes an electrically conductive connection between the electrically conductive common axis and the stop ,
- the contact finger packages are pivoted in the desired manner between their respective end positions by means of the selector shaft and the disc-shaped guide slots which are non-rotatably connected thereto and the multi-lever joints arranged between the contact finger packages and the guide slots.
- the two contact finger packages are optionally mechanically coupled together.
- the Kunststofffingere are slightly delayed against each delayed and correspondingly switchable, so that during the short switching time first the conductive contact of a contact finger package is closed before the conductive contact of the other contact finger packet open and the individual Switching process is completed.
- the contact finger packages or contact assemblies are actuated independently of the direction of rotation of the switching shaft, so that they can trigger the same or alternating pivotal movements of the two contact finger packets with repeated rotational movements.
- the guide slots are preferably each arranged in non-rotatably connected to the shift shaft discs and each guide an actuating pin of each of the multi-lever joints, wherein the bolt can be deflected by the correspondingly shaped movement or guide slots when the discs are rotated with the switching shaft.
- the bolt can be a one-sided frame or fixed to the housing mounted first lever each multi-lever joint having a sliding in the guide slot bolt and be coupled at its free end with a second lever which pivotally engages the contact finger.
- the bolt is preferably arranged between the frame or housing-fixed mounting and the free end of the first lever, so that even at low deflections of the guideway sufficient lever movement can be achieved, which is sufficient for pivoting the respective contact finger package.
- the two contact finger packages or contact assemblies can be repeatedly operated in the aforementioned manner as a disconnector, disconnector or switch without the direction of rotation of the switching shaft is changed.
- the mechanical switch or switch according to the invention can thus continue switching in one direction several times.
- the shift shaft may, for example, be coupled to an existing rotary drive via a step transmission, so that a fixed phase assignment can be ensured.
- An unspecified variant also provides for a three-phase arrangement, which can also be realized.
- a plurality of contact finger packages can each be mounted on common joint axes, so that they share the respective joint axes.
- FIGS. 1 to 4 show a mechanical switching contact 10 for switching, which can be used in particular in an on-load tap changer of a tapped transformer.
- the illustrated with reference to an embodiment mechanical switching contact 10 has two pivotable between two end positions, electrically conductively interconnected contact fingers 12 and 14, which are each operatively connected via multi-lever joints 16 with a rotatable switching shaft 18.
- cams 22a, 22b, 22c are arranged, each serving for guiding and movement of the multi-lever joints 16.
- the cams 22a, 22b, 22c each have circumferential guide slots 24, which serve for the articulation of the multi-lever joints 16 and the coupled therewith deflection of the contact fingers 12 and 14.
- the mechanical switching contact 10 shown is designed as a changeover switch or as an open switch, which is why the two pivotable contact fingers 12 and 14 are electrically connected and mounted on the common axis 20.
- the axis 20 is arranged parallel to the rotatable switching shaft 18.
- Each of the two pivotable contact fingers 12 and 14 is also assigned a separate mechanical, electrically conductive stop 26 and 28 to form the respective switched end positions of the switch.
- the upper contact finger 12 has a first stop 26 on which it bears in a first switching position electrically conductive, so that an electrically conductive connection between the axis 20 and the first stop 26 is made.
- the lower contact finger 14 is associated with the second stop 28, to which it bears electrically conductively in a second switching position, so that an electrically conductive connection between the axis 20 and the second stop 28 is made.
- the first contact finger 12 is lifted from the first stop 26, while the second contact finger 14 rests against the second stop 28.
- both contact fingers 12 and 14 briefly abut against their corresponding contact abutments 26 and 28, respectively, so that the changeover switch has briefly closed both contacts.
- the contact fingers 12 and 14 By a rotation of the switching shaft 18 in any direction and the coupled rotation of the cam 22 and the guide slots 24 disposed therein and by the thus triggered pivoting movements of the contact fingers 12, 14 and the guide slots 24 arranged multi-lever joints 16 are the contact fingers 12 and 14 in pivoted the desired way between their respective end positions.
- the two contact fingers 12 and 14 are mechanically coupled to each other via the guide slots 24.
- guide slots 24 and the trajectories formed by the contact fingers 12 and 14 are slightly delayed against each other and pivotally switchable, so that during the short switching time, the first conductive contact of a contact finger 12 is closed before the conductive Contacting the other contact finger 14 is opened and the individual switching operation is completed.
- FIGS. 2 to 4 shown mounting frame 30 serve to anchor and support the axis 20 and the stops 26 and 28 and the associated or mounted thereon movable parts.
- the movements of the multi-lever joints 16 are clarified, which are formed from a plurality of interconnected levers 32 and 34.
- a one-sided frame or housing fixedly mounted long lever 32 of each multi-lever joint 16 has a sliding in the guide slot 24 bolt 36 which is located closer to its free end 38 than at its pivotal anchorage to the mounting frame 30.
- a short lever 34 which engages pivotally on the contact finger 14 at its other end.
- the bolt 36 is placed between the frame or housing-fixed mounting 40 and the free end 38 of the long lever 32, that even at low deflections of the guideway 24 sufficient lever movement can be achieved, the pivoting of the contact finger 14th sufficient.
- the upper contact finger 12 is coupled in a corresponding manner with a similarly designed and dimensioned multi-lever joint 16 with its associated guideway 24, so that the same offset pivoting movements of the two contact fingers 12 and 14 are triggered by similar guideways 24, which are offset from one another in the direction of rotation can.
- the contact fingers 12 and 14 regardless of the direction of rotation of the switching shaft 18 can be actuated, so that the switching shaft 18 in each case repeated pivotal movements of the same pivotal movements of the two contact fingers 12 and 14 triggers.
- the mechanical switching contact 10 according to the invention provides a reliable mechanical changeover switch, the shift finger 12, 14 are positively guided via the rotating shaft 18 and the cam 22 and therefore can be controlled very accurately and reliably, regardless of the direction of rotation of the shaft.
- the two contact fingers 12 and 14 can be repeatedly actuated in the manner shown as an enable switch, disconnector or switch without the direction of rotation of the switching shaft 18 is changed.
- the mechanical changeover switch according to the invention can thus continue to switch in one direction or switch back and forth several times.
- the switching shaft 18 may, for example, be coupled via a step transmission to an existing rotary drive, so that a fixed phase assignment can be ensured.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- Tumbler Switches (AREA)
Description
Die vorliegende Erfindung betrifft einen mechanischen Schaltkontakt zur Umoder Freischaltung bzw. zur Trennung eines elektrischen Kontakts, insbesondere in einem Lastumschalter eines Stufenschalters mit den Merkmalen des unabhängigen Patentanspruchs.The present invention relates to a mechanical switching contact for Umoder activation or for the separation of an electrical contact, in particular in a diverter switch a tap changer with the features of the independent claim.
Bekannte Lastumschalter für Stufenschalter von Regeltransformatoren besitzen meist eine sog. Widerstandsschnellumschaltung, deren Schaltkontaktwellen von einem Kurvenscheibengetriebe gesteuert werden, das wiederum von einem Kraftspeicher angetrieben wird. Hierbei bewegt sich die Kurvenscheibe in einer oszillierenden Bewegung zwischen zwei Endlagen, und zwar unabhängig von der jeweiligen Bewegungsrichtung des Wählers. Dies bedeutet, dass die Kontakte, welche bei einer ersten Drehrichtung der Kurvenscheibe als erste geschlossen haben, bei einer Rückbewegung als erste öffnen. Die Kontakte, welche bei der gleichen Drehrichtung der Kurvenscheibe zuerst geöffnet haben, schließen bei der Rückbewegung zuletzt.Known diverter switch for tap changers of control transformers usually have a so-called. Resistance Quick changeover, the switching contact shafts are controlled by a cam gear, which in turn is driven by a power storage. In this case, the cam moves in an oscillating movement between two end positions, regardless of the direction of movement of the selector. This means that the contacts, which have closed first in a first rotational direction of the cam, open in a return movement as the first. The contacts, which have opened in the same direction of rotation of the cam first, close last in the return movement.
Die
Ein weiterer mechanischer Schaltkontakt zur Umschaltung bei einem Laststufenschalter ist aus der
Den Betätigungsmechanismen für bekannte mechanische Schaltkontakte zur Umschaltung bei Laststufenschaltern ist gemeinsam, dass die Umschaltung zwischen zwei Endlagen erfolgt, so dass oszillierende Schaltbewegungen erforderlich sind.The actuating mechanisms for known mechanical switching contacts for switching in on-load tap-changers have in common that switching takes place between two end positions, so that oscillating switching movements are required.
Die
Die
Ein Ziel der vorliegenden Erfindung besteht darin, einen zuverlässig arbeitenden mechanischen Schaltkontakt vorzuschlagen, der eine mechanisch und elektrisch sichere Kontaktgabe zwischen zwei Endlagen und unabhängig von einer Drehrichtung einer Betätigungswelle gestattet.An object of the present invention is to propose a reliable mechanical switching contact, which allows a mechanically and electrically secure contact between two end positions and regardless of a direction of rotation of an actuating shaft.
Dieses Ziel der Erfindung wird mit dem Gegenstand des unabhängigen Patentanspruchs erreicht. Merkmale vorteilhafter Weiterbildungen der Erfindung ergeben sich aus den abhängigen Ansprüchen. Zur Erreichung des Ziels schlägt die vorliegende Erfindung einen mechanischen Schaltkontakt zur Kontaktgabe, Kontakttrennung bzw. Umschaltung vor, der insbesondere bei einem Laststufenschalter eines Stufentransformators zum Einsatz kommen kann. Der mechanische Schaltkontakt weist wenigstens zwei unabhängig voneinander bewegliche, jeweils zwischen zwei Endlagen verschwenkbare, elektrisch leitend miteinander verbundene Kontakte oder Kontaktbaugruppen oder Kontaktfingerpakete auf, die jeweils über Mehrhebelgelenke mit einer drehbaren Schaltwelle wirkverbunden sind, die über umlaufende Führungskulissen zur Betätigung der Mehrhebelgelenke und zur damit gekoppelten Auslenkung der Kontakte oder Kontaktbaugruppen verfügt.This object of the invention is achieved with the subject matter of the independent patent claim. Features of advantageous developments of the invention result from the dependent claims. To achieve the object, the present invention proposes a mechanical switching contact for making contact, contact separation or switching, which can be used in particular in an on-load tap changer of a tapped transformer. The mechanical switching contact has at least two independently movable, in each case pivotable between two end positions, electrically interconnected contacts or contact assemblies or Kontaktfingerpakete, which are operatively connected via multi-lever joints with a rotatable switching shaft, the circulating guide slots for actuating the multi-lever joints and coupled thereto Deflection of the contacts or contact assemblies has.
Dieser erfindungsgemäße mechanische Schaltkontakt ist als Freischalter oder Umschalter ausgebildet und dient zur zuverlässigen sowie mechanisch und elektrisch hoch belastbaren Umschaltung, bspw. bei einem Stufentransformator. Die beiden verschwenkbaren Kontakte oder Kontaktfingerpakete sind dabei vorzugsweise auf einer elektrisch leitenden gemeinsamen Achse gelagert, die parallel zur drehbaren Schaltwelle angeordnet ist. Wahlweise können die Kontakte oder Kontaktfingerpakte jedoch auch abweichend davon gelagert sein, bspw. senkrecht zur Achse. Jedem der beiden verschwenkbaren Kontaktbaugruppen oder Kontaktfingerpakete ist weiterhin ein separater mechanischer, elektrisch leitender, als Kontakt ausgebildeter Anschlag zur Bildung der jeweils geschalteten Endlagen des Freischalters, Trennschalters oder Umschalters zugeordnet.This mechanical switching contact according to the invention is designed as a disconnector or switch and is used for reliable and mechanically and electrically highly resilient switching, eg. In a tapped transformer. The two pivotable contacts or contact finger packages are preferably mounted on an electrically conductive common axis, which is arranged parallel to the rotatable switching shaft. Optionally, however, the contacts or contact finger pacts may also be stored deviating therefrom, for example perpendicular to the axis. Each of the two pivotable contact assemblies or contact finger packets is still a separate mechanical, electrically conductive, trained as a contact stop for forming the respective switched end positions of the circuit breaker, disconnector or switch assigned.
Der erfindungsgemäße mechanische Schaltkontakt liefert einen zuverlässig arbeitenden elektrischen Trenn- oder Umschalter, dessen Schaltfinger über eine rotierende Kurvenkulisse oder Scheibe zwangsgeführt angetrieben sind und deshalb sehr genau und zuverlässig gesteuert werden können, und zwar entsprechend der Kurvengestaltung unabhängig von der Drehrichtung der Kurvenkulisse oder Scheibe. In vielen Einsatzfällen ist es besonders vorteilhaft, wenn kein oszillierender Antrieb, sondern eine rotierende, ggf. sogar richtungsunabhängige Betätigungsbewegung für den Trenn- oder Umschalter genutzt werden kann, wie dies bspw. bei bekannten Stufenschaltern oder Lastschaltern o. dgl. im Starkstrombereich der Fall ist.The mechanical switching contact according to the invention provides a reliable working electrical isolation or changeover switch whose shift fingers are forcibly driven via a rotating cam slot or disc and therefore can be controlled very accurately and reliably, according to the curve design regardless of the direction of rotation of the cam or disc. In many applications, it is particularly advantageous if no oscillating drive, but a rotating, possibly even direction-independent actuating movement for the disconnector or switch can be used, as for example. In known tap changers or load switches o. The like. In the high current range is the case ,
Weiterhin kann vorgesehen sein, dass die erste Kontaktbaugruppe oder das erste Kontaktfingerpaket in einer ersten Endlage des mechanischen Schaltkontakts an seinem elektrisch leitenden mechanischen Anschlag anliegt und eine elektrisch leitende Verbindung zwischen der elektrisch leitenden gemeinsamen Achse und dem Anschlag herstellt, während die zweite Kontaktbaugruppe oder das zweite Kontaktfingerpaket von dem ihm zugeordneten elektrisch leitenden mechanischen Anschlag abgehoben ist. Durch unabhängiges Verschwenken der beiden Kontaktfingerpakete kann sichergestellt werden, dass eine Umschaltwirkung ohne gleichzeitige Kontaktierung beider zu schaltenden Anschlüsse ermöglicht ist. So ist das erste Kontaktfingerpaket in der zweiten Endlage des mechanischen Schaltkontakts von dem ihm zugeordneten elektrisch leitenden mechanischen Anschlag abgehoben, während das zweite Kontaktfingerpaket an dem ihm zugeordneten elektrisch leitenden mechanischen Anschlag anliegt und eine elektrisch leitende Verbindung zwischen der elektrisch leitenden gemeinsamen Achse und dem Anschlag herstellt.Furthermore, it can be provided that the first contact assembly or the first contact finger package in a first end position of the mechanical switching contact its electrically conductive mechanical stop abuts and establishes an electrically conductive connection between the electrically conductive common axis and the stop, while the second contact assembly or the second contact finger packet is lifted from the associated electrically conductive mechanical stop. By independently pivoting the two contact finger packets it can be ensured that a switching effect without simultaneous contacting of both connections to be switched is made possible. Thus, the first contact finger packet in the second end position of the mechanical switching contact is lifted from the associated electrically conductive mechanical stop, while the second contact finger packet rests against the associated electrically conductive mechanical stop and establishes an electrically conductive connection between the electrically conductive common axis and the stop ,
Durch die Schaltwelle und die drehfest mit dieser verbundenen scheibenförmigen Führungskulissen sowie die zwischen den Kontaktfingerpaketen und den Führungskulissen angeordneten Mehrhebelgelenke werden die Kontaktfingerpakete in der gewünschten Weise zwischen ihren jeweiligen Endlagen verschwenkt. Somit sind die beiden Kontaktfingerpakete wahlweise mechanisch miteinander gekoppelt. Je nach Kontur der in den scheibenförmigen Führungskulissen oder Kurvenscheiben angeordneten Bewegungsbahnen sind die Kontaktfingerpakete geringfügig gegeneinander verzögert verschwenkbar und entsprechend schaltbar, so dass während der kurzen Schaltzeit zunächst die leitende Kontaktierung des einen Kontaktfingerpakets geschlossen wird, bevor die leitende Kontaktierung des anderen Kontaktfingerpakets geöffnet und der einzelne Schaltvorgang abgeschlossen wird.The contact finger packages are pivoted in the desired manner between their respective end positions by means of the selector shaft and the disc-shaped guide slots which are non-rotatably connected thereto and the multi-lever joints arranged between the contact finger packages and the guide slots. Thus, the two contact finger packages are optionally mechanically coupled together. Depending on the contour of the arranged in the disc-shaped guide slots or cams trajectories the Kontaktfingerpakete are slightly delayed against each delayed and correspondingly switchable, so that during the short switching time first the conductive contact of a contact finger package is closed before the conductive contact of the other contact finger packet open and the individual Switching process is completed.
In der erwähnten Weise sind die Kontaktfingerpakete oder Kontaktbaugruppen unabhängig von der Drehrichtung der Schaltwelle betätigbar, so dass diese bei wiederholten Drehbewegungen jeweils gleichartige oder wechselnde Schwenkbewegungen der beiden Kontaktfingerpakete auslösen kann. Die Führungskulissen sind vorzugsweise jeweils in drehfest mit der Schaltwelle verbundenen Scheiben angeordnet und führen jeweils einen Betätigungsbolzen jedes der Mehrhebelgelenke, wobei der Bolzen durch die entsprechend geformten Bewegungs- bzw. Führungskulissen ausgelenkt werden kann, wenn die Scheiben mit der Schaltwelle gedreht werden. Gemäß einer Ausführungsvariante der Erfindung kann ein einseitig rahmen- oder gehäusefest gelagerter erster Hebel jedes Mehrhebelgelenks einen in der Führungskulisse gleitenden Bolzen aufweisen und an seinem freien Ende mit einem zweiten Hebel gekoppelt sein, der schwenkbar am Kontaktfinger angreift. Der Bolzen ist vorzugsweise zwischen der rahmen- bzw. gehäusefesten Lagerung und dem freien Ende des ersten Hebels angeordnet, so dass bereits bei geringen Auslenkungen der Führungsbahn eine ausreichende Hebelbewegung erreicht werden kann, die zur Verschwenkung des jeweiligen Kontaktfingerpakets ausreicht.In the aforementioned manner, the contact finger packages or contact assemblies are actuated independently of the direction of rotation of the switching shaft, so that they can trigger the same or alternating pivotal movements of the two contact finger packets with repeated rotational movements. The guide slots are preferably each arranged in non-rotatably connected to the shift shaft discs and each guide an actuating pin of each of the multi-lever joints, wherein the bolt can be deflected by the correspondingly shaped movement or guide slots when the discs are rotated with the switching shaft. According to an embodiment of the invention can a one-sided frame or fixed to the housing mounted first lever each multi-lever joint having a sliding in the guide slot bolt and be coupled at its free end with a second lever which pivotally engages the contact finger. The bolt is preferably arranged between the frame or housing-fixed mounting and the free end of the first lever, so that even at low deflections of the guideway sufficient lever movement can be achieved, which is sufficient for pivoting the respective contact finger package.
Die beiden Kontaktfingerpakete oder Kontaktbaugruppen können in der erwähnten Weise mehrfach als Trennschalter, Freischalter oder Umschalter betätigt werden, ohne dass die Drehrichtung der Schaltwelle geändert wird. Der erfindungsgemäße mechanische Schalter bzw. Umschalter kann somit mehrfach in einer Richtung weiterschalten. Die Schaltwelle kann bspw. über ein Schrittgetriebe an einen vorhandenen Drehantrieb gekoppelt sein, so dass eine feste Phasenzuordnung sichergestellt werden kann.The two contact finger packages or contact assemblies can be repeatedly operated in the aforementioned manner as a disconnector, disconnector or switch without the direction of rotation of the switching shaft is changed. The mechanical switch or switch according to the invention can thus continue switching in one direction several times. The shift shaft may, for example, be coupled to an existing rotary drive via a step transmission, so that a fixed phase assignment can be ensured.
Es sei weiterhin betont, dass durch eine geeignete Gestaltung und Auslegung der Kurvenkulissen der Kurvenscheiben nahezu beliebige Schaltwinkel und Schaltrampen erzielt werden können, sowohl beim Öffnungsweg der Kontakte als auch hinsichtlich des Drehwinkels der Antriebswelle.It should also be emphasized that can be achieved by a suitable design and interpretation of the curve scenes of the cams almost any switching angle and switching ramps, both in the opening path of the contacts and in terms of the rotation angle of the drive shaft.
Eine hier nicht näher erläuterte Variante sieht zudem eine dreiphasige Anordnung vor, die sich ebenfalls realisieren lässt. Bei einer solchen dreiphasigen Anordnung können jeweils mehrere Kontaktfingerpakete auf gemeinsamen Gelenkachsen gelagert sein, so dass sie sich die jeweiligen Gelenkachsen teilen.An unspecified variant also provides for a three-phase arrangement, which can also be realized. In such a three-phase arrangement, a plurality of contact finger packages can each be mounted on common joint axes, so that they share the respective joint axes.
Die Erfindung wird nachfolgend anhand von Ausführungsbeispielen unter Verwendung der nachfolgend beschriebenen Zeichnungen näher erläutert.
-
Fig. 1 zeigt eine schematische Perspektivansicht einer Ausführungsvariante eines erfindungsgemäßen mechanischen Schaltkontaktes. -
Fig. 2 zeigt eine weitere Darstellung des mechanischen Schaltkontaktes gemäßFig. 1 . -
Fig. 3 zeigt eine andere Ansicht des Schaltkontaktes gemäßFig. 2 . -
Fig. 4 zeigt eine dritte Ansicht des Schaltkontaktes gemäßFig. 2 .
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Fig. 1 shows a schematic perspective view of an embodiment of a mechanical switching contact according to the invention. -
Fig. 2 shows a further illustration of the mechanical switching contact according toFig. 1 , -
Fig. 3 shows a different view of the switching contact according toFig. 2 , -
Fig. 4 shows a third view of the switching contact according toFig. 2 ,
Das nachfolgend beschriebene Ausführungsbeispiel ist nicht einschränkend zu verstehen, sondern dient zur Erläuterung der Funktion eines erfindungsgemäßen mechanischen Schaltkontaktes. Die schematischen Darstellungen der
Der gezeigte mechanische Schaltkontakt 10 ist als Umschalter bzw. als Freischalter ausgebildet, weshalb die beiden verschwenkbaren Kontaktfinger 12 und 14 elektrisch leitend verbunden und auf der gemeinsamen Achse 20 gelagert sind. Die Achse 20 ist parallel zur drehbaren Schaltwelle 18 angeordnet. Jedem der beiden verschwenkbaren Kontaktfinger 12 und 14 ist zudem ein separater mechanischer, elektrisch leitender Anschlag 26 und 28 zur Bildung der jeweils geschalteten Endlagen des Umschalters zugeordnet. So weist der obere Kontaktfinger 12 einen ersten Anschlag 26 auf, an dem er in einer ersten Schaltstellung elektrisch leitend anliegt, so dass eine elektrisch leitende Verbindung zwischen der Achse 20 und dem ersten Anschlag 26 hergestellt ist. Dem unteren Kontaktfinger 14 ist der zweite Anschlag 28 zugeordnet, an dem er in einer zweiten Schaltstellung elektrisch leitend anliegt, so dass eine elektrisch leitende Verbindung zwischen der Achse 20 und dem zweiten Anschlag 28 hergestellt ist. In der in den
Durch eine Drehung der Schaltwelle 18 in beliebige Richtung und die damit gekoppelte Drehung der Kurvenscheiben 22 und der darin angeordneten Führungskulissen 24 sowie durch die damit ausgelösten Schwenkbewegungen der zwischen den Kontaktfingern 12, 14 und den Führungskulissen 24 angeordneten Mehrhebelgelenke 16 werden die Kontaktfinger 12 und 14 in der gewünschten Weise zwischen ihren jeweiligen Endlagen verschwenkt. Die beiden Kontaktfinger 12 und 14 sind über die Führungskulissen 24 mechanisch miteinander gekoppelt. Je nach Kontur der in den Kurvenscheiben 22 angeordneten Führungskulissen 24 und der dadurch ausgebildeten Bewegungsbahnen sind die Kontaktfinger 12 und 14 geringfügig gegeneinander verzögert verschwenkbar und entsprechend schaltbar, so dass während der kurzen Schaltzeit zunächst die leitende Kontaktierung des einen Kontaktfingers 12 geschlossen wird, bevor die leitende Kontaktierung des anderen Kontaktfingers 14 geöffnet und der einzelne Schaltvorgang abgeschlossen wird.By a rotation of the switching
Die in den
In der dargestellten Weise sind die Kontaktfinger 12 und 14 unabhängig von der Drehrichtung der Schaltwelle 18 betätigbar, so dass die Schaltwelle 18 bei wiederholten Drehbewegungen jeweils gleichartige Schwenkbewegungen der beiden Kontaktfinger 12 und 14 auslöst. Der erfindungsgemäße mechanische Schaltkontakt 10 liefert einen zuverlässig arbeitenden mechanischen Umschalter, dessen Schaltfinger 12, 14 über die rotierende Welle 18 und die Kurvenscheiben 22 zwangsgeführt sind und deshalb sehr genau und zuverlässig gesteuert werden können, und zwar unabhängig von der Drehrichtung der Welle.In the manner shown, the
Die beiden Kontaktfinger 12 und 14 können in der gezeigten Weise mehrfach als Freischalter, Trennschalter oder Umschalter betätigt werden, ohne dass die Drehrichtung der Schaltwelle 18 geändert wird. Der erfindungsgemäße mechanische Umschalter kann somit mehrfach in einer Richtung weiterschalten bzw. hin- und herschalten. Die Schaltwelle 18 kann bspw. über ein Schrittgetriebe an einen vorhandenen Drehantrieb gekoppelt sein, so dass eine feste Phasenzuordnung sichergestellt werden kann.The two
Claims (8)
- Mechanical switch contact (10) for on-load tap changer of a tapped transformer, which comprises at least two interconnected electrically conductively interconnected contact fingers or contact finger blocks (12, 14) which are respectively pivotable between two end positions and which are respectively operatively connected by way of multi-lever joints (16) with a rotatable switching shaft (18), having encircling gate guides (24) for actuation of the multi-lever joints (16) and for deflection, which is coupled therewith, of the contact fingers or contact finger blocks (12, 14), characterised in that the contact fingers (12, 14) or contact finger blocks are actuable independently of the rotational direction of the switching shaft (18) and this shaft in the case of repeated rotational movements triggers respectively identical pivot movements of the two contact fingers (12, 14) or contact finger blocks.
- Mechanical switch contact according to claim 1, characterised in that the two pivotable contact fingers or contact finger blocks (12, 14) are mounted on an electrically conductive common axle (20) and that a separate mechanical electrically conductive abutment (26, 28) for forming the respectively connected end positions is associated with each of the two pivotable contact fingers or contact finger blocks (12, 14) and that the common axle (20) is arranged parallel to the rotatable switching shaft (18).
- Mechanical switch contact according to claim 1 or 2, characterised in that the first contact finger (12) or the first contact finger block in a first end position of the mechanical switch contact (10) bears against its electrically conductive mechanical abutment (26) and produces an electrically conductive connection between the electrically conductive common axle (20) and the abutment (26), whereas the second contact finger (14) or the second contact finger block is raised from the electrically conductive mechanical abutment (28) associated therewith.
- Mechanical switch contact according to any one of claims 1 to 3, characterised in that the first contact finger (12) or the first contact finger block in the second end position of the mechanical switch contact (10) is raised from the electrically conductive mechanical abutment (26) associated therewith, whereas the second contact finger (14) or the second contact finger block bears against the electrically conductive mechanical abutment (28) associated therewith and produces an electrically conductive connection between the electrically conductive common axle (20) and the abutment (28).
- Mechanical switch contact according to claim 4, characterised in that the two contact fingers (12, 14) or contact finger blocks are mechanically coupled together and actuable or pivotable and thereby switchable slightly delayed relative to one another.
- Mechanical switch contact according to any of claims 1 to 5, characterised in that the gate guides (24) are respectively arranged in cam discs (22a, 22b, 22c) connected with the switching shaft (18) to be secure against rotation relative thereto and respectively guide and deflect an actuating pin (36) of each of the multi-lever joints (16).
- Mechanical switch contact according to claim 6, characterised in that a first lever (32), which is mounted at one end to be fixed relative to a frame or housing, of each multi-lever joint (16) comprises a pin (36) sliding in the gate guide (24) and is coupled at its free end (38) with a second lever (34), which pivotably engages the contact finger (12, 14) or the contact finger block.
- Mechanical switch contact according to claim 7, characterised in that the pin (36) is arranged between the mounting (40) fixed relative to the frame or housing and the free end (38) of the first lever (32).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010015051A DE102010015051B4 (en) | 2010-04-15 | 2010-04-15 | Mechanical switching contact |
PCT/EP2011/000854 WO2011128012A1 (en) | 2010-04-15 | 2011-02-23 | Mechanical switch contact |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2559042A1 EP2559042A1 (en) | 2013-02-20 |
EP2559042B1 true EP2559042B1 (en) | 2014-04-09 |
Family
ID=43927962
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11710116.2A Active EP2559042B1 (en) | 2010-04-15 | 2011-02-23 | Mechanical switching contact |
Country Status (12)
Country | Link |
---|---|
US (1) | US8927885B2 (en) |
EP (1) | EP2559042B1 (en) |
JP (1) | JP5744181B2 (en) |
KR (1) | KR101778104B1 (en) |
CN (1) | CN102893359B (en) |
BR (1) | BR112012025815B1 (en) |
CA (1) | CA2803182A1 (en) |
DE (1) | DE102010015051B4 (en) |
HK (1) | HK1178682A1 (en) |
RU (1) | RU2012148550A (en) |
UA (1) | UA106652C2 (en) |
WO (1) | WO2011128012A1 (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102010007535B4 (en) * | 2010-02-11 | 2017-12-21 | Maschinenfabrik Reinhausen Gmbh | Tap-changer with freewheeling element |
DE102010020180A1 (en) * | 2010-05-11 | 2011-11-17 | Maschinenfabrik Reinhausen Gmbh | Diverter switch for a tap changer |
DE102013102299B4 (en) * | 2013-03-08 | 2014-12-04 | Maschinenfabrik Reinhausen Gmbh | linear voters |
DE102013107554B4 (en) * | 2013-07-16 | 2016-05-19 | Maschinenfabrik Reinhausen Gmbh | load selector |
DE102014100421B3 (en) * | 2014-01-15 | 2015-01-15 | Maschinenfabrik Reinhausen Gmbh | Switch for a switching device with switching shaft, its use in a diverter switch, switching device with switching shaft and switch, their use in an on-load tap-changer, load switch for on-load tap-changer and control transformer |
DE102014107722B3 (en) * | 2014-06-02 | 2015-09-03 | Maschinenfabrik Reinhausen Gmbh | Switch for a switching device, diverter switch of an on-load tap-changer and permanent main switch and disconnector for this purpose |
DE102014112764A1 (en) * | 2014-09-04 | 2016-03-10 | Maschinenfabrik Reinhausen Gmbh | Switching arrangement for a regulating transformer, in particular polarity switch |
CN105513838A (en) * | 2014-09-25 | 2016-04-20 | 莫诺产业股份有限公司 | No-load tap switch of middle and low voltage distribution transformer |
CN104752076A (en) * | 2015-04-21 | 2015-07-01 | 武汉长虹恒通高压设备有限公司 | Single-phase rolling-ring type contact off-circuit tap changer |
UA124231C2 (en) * | 2015-08-28 | 2021-08-11 | Машіненфабрік Райнхаузен Гмбх | Load transfer switch for an on-load tap changer and continuous main switch and disconnecting switch for same |
CN108987145A (en) * | 2017-06-05 | 2018-12-11 | 乐清市飓达电器厂 | A kind of novel tap switch |
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DE526809C (en) * | 1930-01-24 | 1931-06-10 | Bernhard Jansen Dr Ing | Diverter switch for tapping transformers with two switches moving in opposite directions |
AT275674B (en) * | 1966-12-02 | 1969-11-10 | Elin Union Ag | Main current switch for guiding the continuous current in diverter switches for regulating transformers |
DE1805378A1 (en) * | 1968-10-26 | 1970-05-06 | Reinhausen Maschf Scheubeck | Diverter switch for step switches of preferably three-phase regulating transformers with vacuum switching elements |
DE1930719C2 (en) * | 1969-06-18 | 1971-05-19 | Reinhausen Maschf Scheubeck | Diverter switch for step switches of regulating transformers |
DE3326549A1 (en) | 1983-07-22 | 1985-02-07 | Transformatoren Union Ag, 7000 Stuttgart | LOAD SELECTOR FOR STAGE TRANSFORMERS |
AT389187B (en) | 1988-03-18 | 1989-10-25 | Elin Union Ag | SPRING SUSPENSION DRIVE FOR LOAD SWITCHES OF TAPLED SWITCHES |
DE4101866A1 (en) * | 1991-01-23 | 1992-07-30 | Reinhausen Maschf Scheubeck | On-load tap changer for stepped transformer - movable contact driven by shaft to switch load between fixed contacts |
DE19510809C1 (en) * | 1995-03-24 | 1996-07-04 | Reinhausen Maschf Scheubeck | Load switching device for stepping switch |
DE19547873C1 (en) * | 1995-12-21 | 1997-05-07 | Reinhausen Maschf Scheubeck | Load changeover device for stage-transformer step switch |
CN1205798A (en) * | 1995-12-21 | 1999-01-20 | 赖茵豪森机械制造公司 | Load switch for step switch |
DE10006821A1 (en) * | 2000-02-08 | 2001-08-09 | Siemens Ag | Contact arrangement for an earthing switch in switchgear for power supply and distribution |
DE10050821C1 (en) | 2000-10-13 | 2002-05-02 | Reinhausen Maschf Scheubeck | Mechanical switch contact |
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 |
SE527252C2 (en) * | 2004-06-30 | 2006-01-31 | Abb Research Ltd | Diverter switch for tap changer, has contacts and vacuum switches of main and resistance branches, which are rotated in same direction during movement of operation element |
DE102005048308B3 (en) * | 2005-10-08 | 2006-11-23 | Maschinenfabrik Reinhausen Gmbh | 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 |
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-
2010
- 2010-04-15 DE DE102010015051A patent/DE102010015051B4/en active Active
-
2011
- 2011-02-23 US US13/638,877 patent/US8927885B2/en active Active
- 2011-02-23 JP JP2013504142A patent/JP5744181B2/en active Active
- 2011-02-23 RU RU2012148550/07A patent/RU2012148550A/en not_active Application Discontinuation
- 2011-02-23 CA CA2803182A patent/CA2803182A1/en not_active Abandoned
- 2011-02-23 BR BR112012025815-0A patent/BR112012025815B1/en active IP Right Grant
- 2011-02-23 EP EP11710116.2A patent/EP2559042B1/en active Active
- 2011-02-23 CN CN201180023963.8A patent/CN102893359B/en active Active
- 2011-02-23 WO PCT/EP2011/000854 patent/WO2011128012A1/en active Application Filing
- 2011-02-23 KR KR1020127028741A patent/KR101778104B1/en active IP Right Grant
- 2011-02-23 UA UAA201211498A patent/UA106652C2/en unknown
-
2013
- 2013-05-06 HK HK13105422.2A patent/HK1178682A1/en unknown
Also Published As
Publication number | Publication date |
---|---|
CN102893359B (en) | 2015-08-05 |
EP2559042A1 (en) | 2013-02-20 |
HK1178682A1 (en) | 2013-09-13 |
UA106652C2 (en) | 2014-09-25 |
JP5744181B2 (en) | 2015-07-01 |
DE102010015051B4 (en) | 2012-06-14 |
KR20130093479A (en) | 2013-08-22 |
WO2011128012A1 (en) | 2011-10-20 |
RU2012148550A (en) | 2014-05-20 |
US20130192963A1 (en) | 2013-08-01 |
KR101778104B1 (en) | 2017-09-13 |
JP2013527565A (en) | 2013-06-27 |
BR112012025815A2 (en) | 2016-06-28 |
BR112012025815B1 (en) | 2020-03-03 |
CA2803182A1 (en) | 2011-10-20 |
US8927885B2 (en) | 2015-01-06 |
DE102010015051A1 (en) | 2011-10-20 |
CN102893359A (en) | 2013-01-23 |
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