EP2718950B1 - Switching device - Google Patents
Switching device Download PDFInfo
- Publication number
- EP2718950B1 EP2718950B1 EP12743109.6A EP12743109A EP2718950B1 EP 2718950 B1 EP2718950 B1 EP 2718950B1 EP 12743109 A EP12743109 A EP 12743109A EP 2718950 B1 EP2718950 B1 EP 2718950B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- switching
- switching point
- contact
- movable contact
- contact piece
- 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.)
- Not-in-force
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
- H01H33/14—Multiple main contacts for the purpose of dividing the current through, or potential drop along, the arc
- H01H33/143—Multiple main contacts for the purpose of dividing the current through, or potential drop along, the arc of different construction or type
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/666—Operating arrangements
- H01H33/6661—Combination with other type of switch, e.g. for load break switches
Definitions
- the invention relates to a switching device with a breaker path, which has a first and a second switching point with each movable contact pieces, wherein the first switching point is electrically connected in series via an axially displaceable contact pin with the second switching point and the first switching point as a vacuum interrupter is executed.
- a switching device is for example from the European patent application EP 0 070 794 A2 known.
- the local switching device is equipped with a first and a second switching point, which are arranged axially one behind the other.
- the two switching points are electrically connected in series via a contact pin, wherein the contact pin is axially displaceable.
- Such a construction has the disadvantage that, due to the axial succession of the switching points, a comparatively long switching device is produced.
- a switching device with a breaker gap which has a first and a second switching point, wherein the first switching point is designed as Vakummschaltrschreibe.
- contact pieces of the first switching point are used as an abutment for driving relatively movable contact pieces of the second switching point. Accordingly, to obtain the switching capacity for the design of the second switching point results in a subdivision into rated current and arcing contact pieces, wherein in addition to the electrically parallel-connected Nennstrom- and arcing contact pieces of the second switching point a blowing nozzle is provided.
- the object is achieved in a switching device of the type mentioned in that in a switching operation, the first and the second switching point are forcibly operated and the first switching point works at a turn-off before the second switching point and a switch-on after the second switching point, wherein the Contact pin is a contact stem of a movable contact piece of the vacuum interrupter and the movable contact piece of the second switching point carried by the contact stem, slidably seated on the contact stem.
- the two switching points are each limited by relatively movable contact pieces.
- the two switching points are electrically connected in series, with recourse being made to a displaceable contact pin for the interconnection.
- the contact pin can serve as the only element of an immediate contacting of contact pieces of the two switching points.
- the contact pin is formed only as a portion of the two switching points connecting conductor track.
- a Aufsitzen a movable contact piece on the Contact pin allows a deviation from the known axially successive arrangement of the switching paths.
- the second switching point can also use a space located radially around the contact pin.
- Sliding seating further allows the movable sliding contact piece to move together with or independently of the contact pin, thus providing a facilitated effect on time staggering of switching times of the two switch points.
- the movable contact piece on the sliding contact pin is still given the opportunity to arrange the seated movable contact piece to the contact pin radially spaced, for example, to design radially circumferentially around the contact pin around, wherein the contact pin passes through the radially encircling contact piece.
- the possibility is still given to effect on the contact pin both a drive of the first switching point and a drive of the second switching point.
- This can be coupled via one and the same drive device, a movement on the movable contact pin and the contact pin a corresponding activation of the first or the second switching point are triggered.
- the movements can also be controlled independently.
- the movements can be based on different drives.
- the same drive is used and takes place via appropriate gear coupling different motion sequences on the movable contact pin on the one hand and on the sliding on the movable contact pin seated movable contact on the other.
- a breaker arrangement with a first and a second switching path makes it possible to form switch points designed in different ways, wherein different technical requirements exist due to a time staggering of switching times of the two switching points to the switching points.
- Due to the series connection it is possible, for example, that during a switch-off process, a switch-off arc first burns in the first switch point, whereupon an opening of the second switch point takes place.
- This time scale can vary as needed.
- an opening of the second switching point takes place only when, with great certainty, an opening arc has already extinguished in the first switching point.
- an opening of the second switching point already takes place when a burning of a Ausschaltlichtbogens in the first switching point is still to be expected.
- a further advantageous embodiment may provide that the contact pin part of a movable contact piece of is first switching point and the seated on the movable contact pin contact piece of the second switching point is assigned.
- the contact pin as part of the movable contact piece of the first switching point and a seating of the movable contact piece on the contact pin a direct electrically conductive connection for producing a series connection between the two switching points is possible.
- the first switching point and the second switching point can be connected to each other electrically conductively, for example via a sliding contact arrangement.
- An immediate Aufsitzen the movable contact piece on the contact pin also allows to arrange the two contact points spatially close to each other, so that an axial distance between them is reduced and a short-sized switching device is made possible.
- the switching points can cover each other in the radial direction.
- the first switching point is designed as a vacuum interrupter.
- a vacuum interrupter has the advantage that the switching point between the relatively movable contact pieces is arranged within a closed space. This prevents the ingress of dirt into the switching point.
- the enclosed space is evacuated.
- a vacuum has a high dielectric strength even at short distances. This makes it possible, with relatively small relative movements of the contacts of a switching point of a vacuum interrupter to control each other a high switching capacity.
- the second switching point in an alternative cost-effective design embody.
- a flooding with an electrically insulating gas or an electrically insulating liquid wherein the second switching point passing through electrically insulating fluid should also flow around the vacuum interrupter of the first switching point.
- the electrically insulating fluid can be arranged within an encapsulating housing surrounding the switching points, within which the electrically insulating fluid is placed under an increased pressure.
- insulating liquids, sulfur hexafluoride gas, nitrogen gas or other compressible electrically insulating gases are suitable as the electrically insulating fluid.
- the contact pin is a contact stem of a movable contact piece of the vacuum interrupter.
- a vacuum interrupter has a switching point in its interior.
- the switching point is limited by relatively movable contact pieces.
- a movement of at least one of the contact pieces is to be transmitted through a wall of the vacuum interrupter.
- a contact stem is advantageously formed electrically conductive, so that on this one hand, an electrical contacting of the switching point is possible.
- thermal energy can be dissipated from the interior of the vacuum interrupter via the contact stem.
- FIG. 1 initially basically described the structure of a switching device according to the invention.
- the FIG. 1 shows the switching device in a schematic representation.
- the switching device has a first switching point 1 and a second switching point 2.
- the first switching point 1 is part of a vacuum interrupter.
- the vacuum interrupter is equipped with a fluid-tight housing 3, which acts, for example, electrically insulating.
- the housing 3 is penetrated by relatively movable contact pieces 4, 5 of the first switching point 1.
- the first switching point 1 has a fixed contact piece 4 and a movable contact piece 5.
- the two contact pieces 4, 5 of the first switching point 1 are opposite each other frontally arranged.
- the fixed contact piece 4 is rigidly connected to the housing 3 and passes through this housing 3 fluid-tight.
- a first contact point 6 of the interrupter unit is arranged at the located outside of the housing 3 end of the fixed contact piece 4 of the first switching point 1.
- the movable contact piece 5 also passes through the housing 3. It is provided that the housing 3 has a shape-variable portion 7, so that a relative movement of the movable contact piece 5 of the first switching point 1 relative to the fixed contact piece 4 of the first switching point 1 is made possible.
- the variable-shape section 7 is designed in the manner of a bellows, which is permeated by the movable contact piece 5 of the first switching point 1 in a fluid-tight manner.
- the two contact pieces 4, 5 of the first switching point 1 have at their ends facing radially enlarged portions which limit the switching point 1.
- the two contact pieces 4, 5 of the first switching point 1 are each equipped with contact posts 8a, 8b.
- the contact posts 8a, 8b respectively pass through the housing 3.
- the first contact point 6 of the interrupter unit is arranged on the contact stem 8a of the fixed contact piece 4 of the first switching point 1.
- the two contact pieces 4, 5 are movable relative to each other along a longitudinal axis 9.
- the longitudinal axis 9 lies in each case in the longitudinal axis of the two contact posts 8a, 8b.
- the movable contact piece 5 of the first switching point 1 with its contact stem 8b is axially displaceable along the longitudinal axis 9.
- an insulating rod 10 is coupled at the end facing away from the first switching point 1 end of the contact stem 8b of the movable contact piece 5.
- the insulating rod 10 connects to the end facing away from the first switching point 1 end of the contact stem 8b of the movable contact piece 5 of the first switching point 1.
- a movable contact piece 11 of the second switching point 2 is arranged at a lying outside of the housing 3 of the vacuum interrupter end of the contact stem 8b of the movable contact piece 5 of the first switching point 1.
- the movable contact piece 11 of the second switching point 2 has a sleeve 12, which surrounds the contact stem 8b of the movable contact piece 5 of the first switching point 1 on the shell side.
- a sliding contact arrangement for example, reversibly deformable contact fingers or otherwise formed spring elements arranged.
- another electrical contacting of the movable contact piece 11 of the second switching point 2 and the movable contact piece 5 of the first switching point 1 may be provided.
- Angle rigidly connected to the sleeve 12 extends a radially from the main axis 9 fortragendes support member of the movable contact piece 11 of the second switching point 2.
- an annular peripheral contact surface 13 is arranged at the radially forrolling support member.
- about the annular contact surface 13 of the movable contact piece 11 of the second switching point 2 contacting with a counter-shaped contact surface of a fixed contact piece 14 of the second switching point 2 is possible.
- the contact pieces 11, 14 of the second switching point 2 are substantially annular and coaxial with the longitudinal axis 9, wherein the two contact pieces 11, 14 of the second switching point 2 are penetrated by the contact stem 8b of the movable contact piece of the first switching point 1.
- the breaker gap with the two switching points 1, 2, which are arranged electrically connected in series between the two contact points 6, 15, can be inserted into a power grid.
- the interruption distance of the switching device so a current path between the two contacting points 6, 15 of the interruption distance can be separated or produced.
- the movable contact piece 11 of the second switching point 2 is pressed for example by means of a spring 18 against a located on the contact stem 8b of the movable contact piece 5 of the first switching point 1 stop 17.
- the force of the spring 18 is directed such that the movable contact piece 11 of the second switching point 2 is pressed against the stop 17 in the direction of the fixed contact piece 14 of the second switching point 2.
- the position of the stop 17 is chosen such that at a power-up first, the contact pieces 11, 14 of the second switching point 2 touch each other.
- a movement of the movable contact piece 11 of the second switching point 2 takes place in the direction of the fixed contact piece Parallel to a movement of the movable contact piece 5 and the contact stem 8b of the movable contact piece 5 of the first switching point 1 in the direction of the fixed contact piece 4 of the first switching point 1.
- the Kunststoffstengel 8b it comes first to a contacting of the two contact pieces 11, 14 of the first switching point 1.
- the contact pieces 4, 5 of the first switching point 1 have each other approached, but is still no contact between the two contact pieces 4, 5 of the first switching point 1 before.
- the movable contact piece 11 is movable independently of a movement of the contact stem 8b or of the movable contact piece 5 of the first switching point 1.
- the movable contact pieces 5, 11 of the first and second switching point 1, 2 can be moved by separate drives or special gear arrangements.
Landscapes
- Push-Button Switches (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
Description
Die Erfindung bezieht sich auf ein Schaltgerät mit einer Unterbrecherstrecke, welche eine erste und eine zweite Schaltstelle mit jeweils relativ zueinander bewegbaren Kontaktstücken aufweist, wobei die erste Schaltstelle über einen axial verschiebbaren Kontaktbolzen mit der zweiten Schaltstelle elektrisch in Reihe verschaltet ist und die erste Schaltstelle als Vakuumschaltröhre ausgeführt ist.The invention relates to a switching device with a breaker path, which has a first and a second switching point with each movable contact pieces, wherein the first switching point is electrically connected in series via an axially displaceable contact pin with the second switching point and the first switching point as a vacuum interrupter is executed.
Ein Schaltgerät ist beispielsweise aus der europäischen Patentanmeldung
Weiterhin ist aus der europäischen Patentanmeldung
Aus der US Patent Application Publication
Daher ergibt sich als Aufgabe der Erfindung ein Schaltgerät anzugeben, welches bei vereinfachter Konstruktion eine axial verkürzte Bauweise ermöglicht.Therefore, it is an object of the invention to provide a switching device, which allows for a simplified construction, an axially shortened design.
Erfindungsgemäß wird die Aufgabe bei einem Schaltgerät der eingangs genannten Art dadurch gelöst, dass bei einem Schaltvorgang die erste und die zweite Schaltstelle zwangsweise betätigt werden und die erste Schaltstelle bei einem Ausschaltvorgang vor der zweiten Schaltstelle und bei einem Einschaltvorgang nach der zweiten Schaltstelle arbeitet, wobei der Kontaktbolzen ein Kontaktstengel eines bewegbaren Kontaktstückes der Vakuumschaltröhre ist und das bewegbare Kontaktstück der zweiten Schaltstelle von dem Kontaktstengel getragen, gleitend auf dem Kontaktstengel aufsitzt.According to the invention the object is achieved in a switching device of the type mentioned in that in a switching operation, the first and the second switching point are forcibly operated and the first switching point works at a turn-off before the second switching point and a switch-on after the second switching point, wherein the Contact pin is a contact stem of a movable contact piece of the vacuum interrupter and the movable contact piece of the second switching point carried by the contact stem, slidably seated on the contact stem.
Die beiden Schaltstellen sind jeweils von relativ zueinander bewegbaren Kontaktstücken begrenzt. Dabei sind die beiden Schaltstellen elektrisch in Reihe verschaltet, wobei zur Verschaltung auf einen verschiebbaren Kontaktbolzen zurückgegriffen wird. Der Kontaktbolzen kann dabei als einziges Element einer unmittelbaren Kontaktierung von Kontaktstücken der beiden Schaltstellen dienen. Es kann jedoch auch vorgesehen sein, dass der Kontaktbolzen lediglich als Abschnitt eines die beiden Schaltstellen verbindenden Leiterzuges ausgebildet ist. Ein Aufsitzen eines bewegbaren Kontaktstückes auf dem Kontaktbolzen ermöglicht ein Abweichen von der bekannten axial aufeinander folgenden Anordnung der Schaltstrecken. Die zweite Schaltstelle kann beispielsweise auch einen radial um den Kontaktbolzen herum befindlichen Raum nutzen. Ein gleitendes Aufsitzen ermöglicht weiter, das bewegbare, gleitend aufsitzende Kontaktstück gemeinsam mit oder unabhängig von dem Kontaktbolzen zu bewegen und so eine vereinfachte Beeinflussung einer zeitlichen Staffelung von Schaltzeitpunkten der beiden Schaltstellen hervorzurufen. Durch ein Aufsitzen des bewegbaren Kontaktstückes auf dem verschiebbaren Kontaktbolzen ist weiterhin die Möglichkeit gegeben, das aufsitzende bewegbare Kontaktstück zum Kontaktbolzen radial beabstandet anzuordnen, beispielsweise radial umlaufend um den Kontaktbolzen herum auszugestalten, wobei der Kontaktbolzen das radial umlaufende Kontaktstück durchsetzt. Damit ist weiterhin die Möglichkeit gegeben, über den Kontaktbolzen sowohl einen Antrieb der ersten Schaltstelle als auch einen Antrieb der zweiten Schaltstelle zu bewirken. Damit kann über ein und dieselbe Antriebsvorrichtung eine Bewegung auf den bewegbaren Kontaktbolzen eingekoppelt werden und über den Kontaktbolzen eine entsprechende Ansteuerung der ersten bzw. der zweiten Schaltstelle ausgelöst werden. Zur Erzielung einer größeren Variabilität können die Bewegungen jedoch auch unabhängig angesteuert werden. Die Bewegungen können dazu beispielsweise von unterschiedlichen Antrieben ausgehen. Es kann jedoch auch vorgesehen sein, dass derselbe Antrieb genutzt wird und über entsprechende Getriebe eine Einkoppelung verschiedener Bewegungsabläufe auf den bewegbaren Kontaktbolzen einerseits und auf das gleitend auf dem bewegbaren Kontaktbolzen aufsitzende bewegbare Kontaktstück andererseits erfolgt.The two switching points are each limited by relatively movable contact pieces. In this case, the two switching points are electrically connected in series, with recourse being made to a displaceable contact pin for the interconnection. The contact pin can serve as the only element of an immediate contacting of contact pieces of the two switching points. However, it can also be provided that the contact pin is formed only as a portion of the two switching points connecting conductor track. A Aufsitzen a movable contact piece on the Contact pin allows a deviation from the known axially successive arrangement of the switching paths. For example, the second switching point can also use a space located radially around the contact pin. Sliding seating further allows the movable sliding contact piece to move together with or independently of the contact pin, thus providing a facilitated effect on time staggering of switching times of the two switch points. By a Aufsitzen the movable contact piece on the sliding contact pin is still given the opportunity to arrange the seated movable contact piece to the contact pin radially spaced, for example, to design radially circumferentially around the contact pin around, wherein the contact pin passes through the radially encircling contact piece. Thus, the possibility is still given to effect on the contact pin both a drive of the first switching point and a drive of the second switching point. This can be coupled via one and the same drive device, a movement on the movable contact pin and the contact pin a corresponding activation of the first or the second switching point are triggered. However, to achieve greater variability, the movements can also be controlled independently. For example, the movements can be based on different drives. However, it can also be provided that the same drive is used and takes place via appropriate gear coupling different motion sequences on the movable contact pin on the one hand and on the sliding on the movable contact pin seated movable contact on the other.
Eine Unterbrecheranordnung mit einer ersten und einer zweiten Schaltstrecke ermöglicht es, verschiedenartig konstruierte Schaltstellen auszubilden, wobei aufgrund einer zeitlichen Staffelung von Schaltzeitpunkten der beiden Schaltstellen an die Schaltstellen jeweils unterschiedliche technische Anforderungen bestehen. So ist es beispielsweise möglich, bei einem Ausschaltvorgang an der zuerst öffnenden Schaltstelle, hier der ersten Schaltstelle, eine höhere Belastung durch erwartete Ausschaltlichtbögen zuzulassen, wohingegen die zeitlich darauf schaltende Schaltstelle hinsichtlich auftretender Ausschaltlichtbögen geringer belastet ist. Aufgrund der Reihenschaltung ist es beispielsweise möglich, dass bei einem Ausschaltvorgang zunächst ein Ausschaltlichtbogen in der ersten Schaltstelle brennt, woraufhin eine Öffnung der zweiten Schaltstelle erfolgt.A breaker arrangement with a first and a second switching path makes it possible to form switch points designed in different ways, wherein different technical requirements exist due to a time staggering of switching times of the two switching points to the switching points. Thus, it is possible, for example, to allow for a switch-off at the first opening switching point, here the first switching point, a higher burden of expected Ausschaltlichtbögen, whereas the temporally switching switching point is less burdened with respect to occurring Ausschaltlichtbögen. Due to the series connection, it is possible, for example, that during a switch-off process, a switch-off arc first burns in the first switch point, whereupon an opening of the second switch point takes place.
Diese zeitliche Staffelung kann nach Bedarf variieren. So kann zum einen vorgesehen sein, dass eine Öffnung der zweiten Schaltstelle erst dann erfolgt, wenn mit großer Sicherheit ein Ausschaltlichtbogen in der ersten Schaltstelle bereits erloschen ist. Oder es kann auch vorgesehen sein, dass ein Öffnen der zweiten Schaltstelle bereits dann erfolgt, wenn ein Brennen eines Ausschaltlichtbogens in der ersten Schaltstelle noch zu erwarten ist.This time scale can vary as needed. Thus, on the one hand, it may be provided that an opening of the second switching point takes place only when, with great certainty, an opening arc has already extinguished in the first switching point. Or it can also be provided that an opening of the second switching point already takes place when a burning of a Ausschaltlichtbogens in the first switching point is still to be expected.
Eine weitere vorteilhafte Ausgestaltung kann vorsehen, dass der Kontaktbolzen Teil eines bewegbaren Kontaktstückes der ersten Schaltstelle ist und das auf dem bewegbaren Kontaktbolzen aufsitzende Kontaktstück der zweiten Schaltstelle zugeordnet ist.A further advantageous embodiment may provide that the contact pin part of a movable contact piece of is first switching point and the seated on the movable contact pin contact piece of the second switching point is assigned.
Durch eine Nutzung des Kontaktbolzens als Teil des bewegbaren Kontaktstückes der ersten Schaltstelle sowie einem Aufsitzen des bewegbaren Kontaktstückes auf dem Kontaktbolzen ist eine unmittelbare elektrisch leitende Verbindung zur Herstellung einer Reihenschaltung zwischen den beiden Schaltstellen ermöglicht. Die erste Schaltstelle sowie die zweite Schaltstelle können beispielsweise über eine Gleitkontaktanordnung miteinander elektrisch leitend verbunden sein. Somit ist es möglich, die beiden Schaltstellen über einen impedanzarmen Verbindungsstrompfad miteinander zu verbinden. Ein unmittelbares Aufsitzen des bewegbaren Kontaktstückes auf dem Kontaktbolzen ermöglicht weiterhin, die beiden Kontaktstellen räumlich nah zueinander anzuordnen, so dass ein axialer Abstand zwischen denselben reduziert wird und ein kurz bauendes Schaltgerät ermöglicht wird. Gegebenenfalls können die Schaltstellen einander in radialer Richtung überdecken.By using the contact pin as part of the movable contact piece of the first switching point and a seating of the movable contact piece on the contact pin a direct electrically conductive connection for producing a series connection between the two switching points is possible. The first switching point and the second switching point can be connected to each other electrically conductively, for example via a sliding contact arrangement. Thus, it is possible to connect the two switching points via a low-impedance connection current path with each other. An immediate Aufsitzen the movable contact piece on the contact pin also allows to arrange the two contact points spatially close to each other, so that an axial distance between them is reduced and a short-sized switching device is made possible. Optionally, the switching points can cover each other in the radial direction.
Weiterhin ist vorteilhaft vorgesehen, dass die erste Schaltstelle als Vakuumschaltröhre ausgeführt ist.Furthermore, it is advantageously provided that the first switching point is designed as a vacuum interrupter.
Eine Vakuumschaltröhre weist den Vorteil auf, dass die Schaltstelle zwischen den relativ zueinander bewegbaren Kontaktstücken innerhalb eines abgeschlossenen Raumes angeordnet ist. Damit ist ein Eindringen von Verschmutzungen in die Schaltstelle verhindert. Der abgeschlossene Raum ist evakuiert. Ein Vakuum weist bereits auf geringen Distanzen eine hohe Durchschlagsfestigkeit auf. Damit ist es möglich, bei relativ geringen Relativbewegungen der Kontaktstücke einer Schaltstelle einer Vakuumschaltröhre zueinander eine hohe Schaltleistung zu beherrschen.A vacuum interrupter has the advantage that the switching point between the relatively movable contact pieces is arranged within a closed space. This prevents the ingress of dirt into the switching point. The enclosed space is evacuated. A vacuum has a high dielectric strength even at short distances. This makes it possible, with relatively small relative movements of the contacts of a switching point of a vacuum interrupter to control each other a high switching capacity.
Durch eine Nutzung einer Vakuumschaltröhre für die erste Schaltstelle ist eine Möglichkeit gegeben, die zweite Schaltstelle in einer alternativen kostengünstigeren Konstruktion auszugestalten. Beispielsweise kann für die zweite Schaltstelle eine Durchflutung mit einem elektrisch isolierenden Gas oder einer elektrisch isolierenden Flüssigkeit vorgesehen sein, wobei das die zweite Schaltstelle durchsetzende elektrisch isolierende Fluid auch die Vakuumschaltröhre der ersten Schaltstelle umspülen sollte. Bedarfsweise kann das elektrisch isolierende Fluid innerhalb eines die Schaltstellen umgebenden Kapselungsgehäuses angeordnet sein, innerhalb welchem das elektrisch isolierende Fluid unter einen erhöhen Druck gesetzt ist. Als elektrisch isolierendes Fluid eignen sich beispielsweise Isolierflüssigkeiten, Schwefelhexafluoridgas, Stickstoffgas oder andere komprimierbare elektrisch isolierende Gase.By using a vacuum interrupter for the first switching point is given a possibility, the second switching point in an alternative cost-effective design embody. For example, may be provided for the second switching point a flooding with an electrically insulating gas or an electrically insulating liquid, wherein the second switching point passing through electrically insulating fluid should also flow around the vacuum interrupter of the first switching point. If desired, the electrically insulating fluid can be arranged within an encapsulating housing surrounding the switching points, within which the electrically insulating fluid is placed under an increased pressure. For example, insulating liquids, sulfur hexafluoride gas, nitrogen gas or other compressible electrically insulating gases are suitable as the electrically insulating fluid.
Als vorteilhafte Ausgestaltung ist weiterhin vorgesehen, dass der Kontaktbolzen ein Kontaktstengel eines bewegbaren Kontaktstückes der Vakuumschaltröhre ist.As an advantageous embodiment it is further provided that the contact pin is a contact stem of a movable contact piece of the vacuum interrupter.
Eine Vakuumschaltröhre weist in ihrem Inneren eine Schaltstelle auf. Die Schaltstelle ist dabei durch relativ zueinander bewegbare Kontaktstücke begrenzt. Dabei ist eine Bewegung zumindest eines der Kontaktstücke durch eine Wandung der Vakuumschaltröhre hindurch zu übertragen. Es hat sich als vorteilhaft erwiesen, das bewegbare Kontaktstücke mit einem schlanken Kontaktstengel auszustalten, welche die Wandung der Vakuumschaltröhre durchsetzen. Ein Kontaktstengel ist vorteilhaft elektrisch leitend ausgebildet, so dass über diesen zum einen eine elektrische Kontaktierung der Schaltstelle möglich ist. Zum anderen kann über den Kontaktstengel thermische Energie aus dem Innern der Vakuumschaltröhre abgeleitet werden. Nutzt man nunmehr einen Kontaktstengel einer Vakuumschaltröhre zum Tragen eines bewegbaren Kontaktstückes der zweiten Schaltstelle, kann man die Konstruktion der Vakuumschaltröhre nutzen, um die zweite Schaltstelle selbst mechanisch zu stabilisieren. Damit entfallen beispielsweise Führungs- und Halteelemente für das bewegbare Kontaktstück der zweiten Schaltstelle. Durch ein Aufsitzen des bewegbaren Kontaktstückes der zweiten Schaltstelle auf dem Konstaktstengel des bewegbaren Kontaktstückes der Vakuumschaltröhre ist die Möglichkeit gegeben, Führungselemente gemeinsam für Bewegtteile der ersten und der zweiten Schaltstelle zu nutzen. Damit kann ein kompakt bauendes Schaltgerät ausgebildet werden, das aufgrund des Aufsitzens des bewegbaren Kontaktstückes auf dem Kontaktbolzen in axialer Richtung kurz baut und zum anderen durch eine gemeinsame Abstützung und mechanische Führung der Schaltstellen untereinander die Komplexität des Schaltgerätes reduziert.A vacuum interrupter has a switching point in its interior. The switching point is limited by relatively movable contact pieces. In this case, a movement of at least one of the contact pieces is to be transmitted through a wall of the vacuum interrupter. It has proved to be advantageous to design the movable contact pieces with a slim contact stem, which pass through the wall of the vacuum interrupter. A contact stem is advantageously formed electrically conductive, so that on this one hand, an electrical contacting of the switching point is possible. On the other hand, thermal energy can be dissipated from the interior of the vacuum interrupter via the contact stem. If one now uses a contact stem of a vacuum interrupter for carrying a movable contact piece of the second switching point, one can use the construction of the vacuum interrupter to mechanically stabilize the second switching point itself. This accounts for example leadership and holding elements for the movable contact piece of the second switching point. By a seating of the movable contact piece of the second switching point on the Konstusststengel the movable contact piece of the vacuum interrupter is given the opportunity to use guide elements together for moving parts of the first and the second switching point. This can be a compact design switching device are formed, which builds short due to the seating of the movable contact piece on the contact pin in the axial direction and reduces the complexity of the switching device to each other by a common support and mechanical guidance of the switching points.
Im Folgenden wird ein Ausführungsbeispiel der Erfindung schematisch in einer Zeichnung gezeigt und nachfolgend näher beschrieben. Dabei zeigt die
- Figur 1
- eine erste Schaltstelle und eine zweite Schaltstelle jeweils im geöffneten Zustand, die
Figur 2- die erste Schaltstelle in einem Zwischenzustand und die zweite Schaltstelle im geschlossenen Zustand und die
- Figur 3
- die erste Schaltstelle und die zweite Schaltstelle jeweils im geschlossenen Zustand.
- FIG. 1
- a first switching point and a second switching point in the open state, the
- FIG. 2
- the first switching point in an intermediate state and the second switching point in the closed state and the
- FIG. 3
- the first switching point and the second switching point in each case in the closed state.
Im Folgenden wird anhand der
Die
An einem außerhalb des Gehäuses 3 der Vakuumschaltröhre liegenden Ende des Kontaktstengels 8b des bewegbaren Kontaktstückes 5 der ersten Schaltstelle 1 ist ein bewegbares Kontaktstück 11 der zweiten Schaltstelle 2 angeordnet. Das bewegbare Kontaktstück 11 der zweiten Schaltstelle 2 weist eine Hülse 12 auf, welche den Kontaktstengel 8b des bewegbaren Kontaktstückes 5 der ersten Schaltstelle 1 mantelseitig umgreift. Zwischen den einander zugewandten Bereichen der Hülse 12 bzw. des Kontaktstengels 8b des bewegbaren Kontaktstückes 5 der ersten Schaltstelle 1 ist eine Gleitkontaktanordnung, beispielsweise reversibel verformbare Kontaktfinger oder anderweitig ausgebildete Federelemente, angeordnet. Alternativ oder ergänzend kann auch eine andere elektrische Kontaktierung des bewegbaren Kontaktstückes 11 der zweiten Schaltstelle 2 sowie des bewegbaren Kontaktstückes 5 der ersten Schaltstelle 1 vorgesehen sein. Winkelstarr mit der Hülse 12 verbunden erstreckt sich ein radial von der Hauptachse 9 fortragendes Tragelement des bewegbaren Kontaktstückes 11 der zweiten Schaltstelle 2. An dem radial fortragenden Tragelement ist beispielsweise eine ringförmig umlaufende Kontaktfläche 13 angeordnet. Über die ringförmige Kontaktfläche 13 des bewegbaren Kontaktstückes 11 der zweiten Schaltstelle 2 ist eine Kontaktierung mit einer gegengleich ausgeformten Kontaktfläche eines feststehenden Kontaktstückes 14 der zweiten Schaltstelle 2 möglich. Zwischen den Kontaktflächen des feststehenden Kontaktstückes 14 bzw. des bewegbaren Kontaktstückes 11 der zweiten Schaltstelle 2 ist eine Schaltstrecke der zweiten Schaltstelle 2 angeordnet. Die Kontaktstücke 11, 14 der zweiten Schaltstelle 2 sind dabei im Wesentlichen ringförmig ausgebildet und koaxial zur Längsachse 9 angeordnet, wobei die beiden Kontaktstücke 11, 14 der zweiten Schaltstelle 2 von dem Kontaktstengel 8b des bewegbaren Kontaktstückes der ersten Schaltstelle 1 durchsetzt sind.At a lying outside of the housing 3 of the vacuum interrupter end of the
Mit dem feststehenden Kontaktstück 14 der zweiten Schaltstelle 2 ist ein zweiter Kontaktierungspunkt 15 der Unterbrecherstrecke des Schaltgerätes elektrisch leitend verbunden.With the
Über die beiden Kontaktierungspunkte 6, 15 ist die Unterbrecherstrecke mit den beiden Schaltstellen 1, 2, welche elektrisch in Reihe geschaltet zwischen den beiden Kontaktierungspunkten 6, 15 angeordnet sind, in ein Stromnetz einschleifbar. Mittels der Unterbrecherstrecke des Schaltgerätes ist so ein Strompfad zwischen den beiden Kontaktierungspunkten 6, 15 der Unterbrecherstrecke auftrennbar bzw. herstellbar.About the two
Das bewegbare Kontaktstück 11 der zweiten Schaltstelle 2 ist beispielsweise mittels einer Feder 18 gegen einen an dem Kontaktstengel 8b des bewegbaren Kontaktstückes 5 der ersten Schaltstelle 1 befindlichen Anschlag 17 gepresst. Die Kraftwirkung der Feder 18 ist dabei derart gerichtet, dass das bewegbare Kontaktstück 11 der zweiten Schaltstelle 2 gegen den Anschlag 17 in Richtung des feststehenden Kontaktstückes 14 der zweiten Schaltstelle 2 gepresst ist. Somit ist die Möglichkeit gegeben, bei einer Bewegung der Isolierstange 10 sowie des daran gekoppelten Kontaktstengels 8b des bewegbaren Kontaktstückes 5 der ersten Schaltstelle 1 auch eine Bewegung auf das bewegbare Kontaktstück 11 der zweiten Schaltstelle 2 zu übertragen. Die Lage des Anschlages 17 ist dabei derart gewählt, dass bei einem Einschaltvorgang zunächst die Kontaktstücke 11, 14 der zweiten Schaltstelle 2 einander berühren.The
Im Folgenden wird ausgehend von der in der
Bei einem Ausschaltvorgang erfolgt eine Bewegung der Isolierstange 10 nebst des daran befestigten Kontaktstengels 8b bezüglich einer Einschaltbewegung mit umgekehrtem Richtungssinn. Aufgrund der Anordnung der beiden Schaltstellen 1, 2 sowie der jeweils feststehenden Kontaktstücke 4, 14 bzw. der bewegbaren Kontaktstücke 5, 11 der ersten Schaltstelle 1 bzw. der zweiten Schaltstelle 2 trennen sich zunächst die Kontaktstücke 4, 5 der ersten Schaltstelle 1, wohingegen das bewegbare Kontaktstück 11 der zweiten Schaltstelle 2 durch die Feder 18 gegen das feststehende Kontaktstück 14 gepresst bleibt. Somit sind gegebenenfalls auftretende Ausschaltlichtbögen zunächst an den beiden Kontaktstücken 4, 5 der ersten Schaltstelle 1 geführt. Mit einem Voranschreiten einer Entfernung der Kontaktstücke 4, 5 der ersten Schaltstelle 1 voneinander und einem Anschlagen der Hülse 12 gegen den Anschlag 17 kann nunmehr auch das bewegbare Kontaktstück 11 der zweiten Schaltstelle 2 von dem feststehenden Kontaktstück 14 der zweiten Schaltstelle 2 abgehoben werden.In a turn-off, a movement of the insulating
Nunmehr können die Kontaktstücke 4, 5; 11, 14 der ersten Schaltstelle 1 bzw. der zweiten Schaltstelle 2 vollständig in ihre Ausschaltstellungen bewegt werden. Im Anschluss daran ist die Unterbrechereinheit wiederum bereit, um von ihrer Ausschaltstellung, wie in
Alternativ zum vorstehend beschriebenen Ausführungsbeispiel kann vorgesehen sein, dass das bewegbare Kontaktstück 11 unabhängig von einer Bewegung des Kontaktstengels 8b bzw. des bewegbaren Kontaktstückes 5 der ersten Schaltstelle 1 bewegbar ist. Dazu können die bewegbaren Kontaktstücke 5, 11 der ersten bzw. zweiten Schaltstelle 1, 2 durch separate Antriebe oder spezielle Getriebeanordnungen bewegt werden.As an alternative to the embodiment described above, it can be provided that the
Claims (2)
- Switching device having an interrupter path that comprises a first switching site (1) and a second switching site (2) having in each case contact pieces (4, 5; 11, 14) that can move relative to one another, wherein the first switching site (1) is electrically connected in series to the second switching site (2) by way of an axially displaceable contact pin (8b) and the first switching site (1) is embodied as a vacuum interrupter, characterized in that during a switching process the first switching site (1) and the second switching site (2) are actuated by force and during a switching-off process the first switching site (1) operates before the second switching site (2) and during a switching-on process said first switching site operates after the second switching site (2), wherein the contact pin (8b) is a contact stem (8b) of a movable contact piece (5) of the vacuum interrupter and the movable contact piece (11) of the second switching site (2), supported by the contact stem (8b), is located on the contact stem (8b) in a sliding manner.
- Switching device according to Claim 1,
characterized in that the contact pin (8b) is a part of a movable contact piece (5) of the first switching site (1) and the contact piece (11) that is located on the movable contact pin (8b) is allocated to the second switching site (2).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011079969A DE102011079969A1 (en) | 2011-07-28 | 2011-07-28 | switchgear |
PCT/EP2012/064247 WO2013014070A1 (en) | 2011-07-28 | 2012-07-20 | Switching device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2718950A1 EP2718950A1 (en) | 2014-04-16 |
EP2718950B1 true EP2718950B1 (en) | 2016-12-28 |
Family
ID=46604281
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12743109.6A Not-in-force EP2718950B1 (en) | 2011-07-28 | 2012-07-20 | Switching device |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2718950B1 (en) |
AU (1) | AU2012288979B2 (en) |
CA (1) | CA2843031A1 (en) |
DE (1) | DE102011079969A1 (en) |
WO (1) | WO2013014070A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015204668A1 (en) | 2015-03-16 | 2016-09-22 | Siemens Aktiengesellschaft | Switching device with a first switching device and a separately encapsulated second switching device |
DE102020205784A1 (en) | 2020-03-31 | 2021-09-30 | Siemens Aktiengesellschaft | Switching device with commutation current path |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3038980A (en) * | 1959-12-17 | 1962-06-12 | Gen Electric | Vacuum-type circuit interrupter |
JPS5812230A (en) | 1981-07-16 | 1983-01-24 | 富士電機株式会社 | Vacuum laod switch with disconnecting switch |
FR2733086B1 (en) * | 1995-04-14 | 1997-06-06 | Schneider Electric Sa | HIGH VOLTAGE HYBRID CUTTING DEVICE |
DE19958645C5 (en) | 1999-12-06 | 2011-05-26 | Abb Technology Ag | Hybrid circuit breaker |
FR2826503B1 (en) * | 2001-06-25 | 2003-09-05 | Alstom | CUTTING CHAMBER WITH VACUUM BULB |
FR2840729B1 (en) * | 2002-06-05 | 2004-07-16 | Alstom | HIGH OR MEDIUM VOLTAGE SWITCHING DEVICE WITH MIXED VACUUM AND GAS CUT |
DE102007038898B3 (en) * | 2007-08-13 | 2008-11-20 | Siemens Ag | Switch arrangement for a switchgear |
-
2011
- 2011-07-28 DE DE102011079969A patent/DE102011079969A1/en not_active Withdrawn
-
2012
- 2012-07-20 AU AU2012288979A patent/AU2012288979B2/en not_active Ceased
- 2012-07-20 CA CA2843031A patent/CA2843031A1/en not_active Abandoned
- 2012-07-20 EP EP12743109.6A patent/EP2718950B1/en not_active Not-in-force
- 2012-07-20 WO PCT/EP2012/064247 patent/WO2013014070A1/en active Application Filing
Non-Patent Citations (1)
Title |
---|
None * |
Also Published As
Publication number | Publication date |
---|---|
DE102011079969A1 (en) | 2013-01-31 |
CA2843031A1 (en) | 2013-01-31 |
EP2718950A1 (en) | 2014-04-16 |
AU2012288979A1 (en) | 2014-01-30 |
WO2013014070A1 (en) | 2013-01-31 |
AU2012288979B2 (en) | 2016-09-08 |
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