EP2704172B1 - Rotor for an electrical switch - Google Patents
Rotor for an electrical switch Download PDFInfo
- Publication number
- EP2704172B1 EP2704172B1 EP13179355.6A EP13179355A EP2704172B1 EP 2704172 B1 EP2704172 B1 EP 2704172B1 EP 13179355 A EP13179355 A EP 13179355A EP 2704172 B1 EP2704172 B1 EP 2704172B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rotor
- contact bridge
- spring pins
- contact
- springs
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
- H01H19/36—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand the operating part having only two operative positions, e.g. relatively displaced by 180 degrees
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
- H01H1/20—Bridging contacts
- H01H1/2041—Rotating bridge
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
- H01H1/20—Bridging contacts
- H01H1/2041—Rotating bridge
- H01H1/205—Details concerning the elastic mounting of the rotating bridge in the rotor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/04—Contacts
- H01H73/045—Bridging contacts
Definitions
- Switching devices for switching electric currents typically comprise at least one contact system and further housing conversions.
- the contact system forms an electrical switch and serves to switch electrical currents.
- One class of switching devices are the so-called "power switches,” which typically can switch currents of 100A and more.
- These circuit breakers comprise a housing in which the individual phases of the currents are switched. The individual phases of the currents can be housed in Polkassetten, which are enclosed by its own housing. In the Polkassetten moving and fixed contacts are housed, which can be mechanically separated or brought together, for switching off or turning on the currents. When separating movable and fixed contact of a polar cartridge, an arc is formed, which is typically extinguished in a so-called "quenching chamber”. Also, circuit breakers are known which contain no Polkassetten and accommodate moving and fixed contacts in their housing.
- the DE 10 2010 035 625 A1 relates to an electrical switch with at least one switching unit, comprising: a pivotable about a pivot axis contact lever with at least one electrical switching contact and two parallel plates, between which the contact lever is held by means of pins resiliently. It is envisaged that the contact lever is inserted with the plates and the pins in an electrically non-conductive housing of the switching unit, wherein at least one of the pins forms a retaining pin, wherein the length of the retaining pin exceeds the distance between the parallel plates and wherein the retaining pin through each extending through a hole in the two plates and with its one end of the pin in a retaining recess of the housing and is held with its other pin end in an opposite holding recess of the housing.
- the US 2009/0065341 A1 refers generally to a mechanism of a circuit breaker contact system.
- a mechanism is disclosed for a double-breakage rotary contact system which permits direct transfer of torque from the component storing energy (such as springs) to the contact arm in the ON position (closed contacts) without the use of an intermediate camming surface.
- Double-break contact systems with a rotatory structure are very often prone to asymmetries.
- the asymmetries may be due to the tolerance of the components or unbalanced consumption during operation.
- the contact pieces of the contact bridge can burn off asymmetrically.
- These asymmetries lead to unequal contact forces and contact resistance at the contact points.
- Previously known solutions to avoid these asymmetries provide a compensation possibility by the movable contact bridge as well as by a floating arrangement of the switching shaft or the rotor in the polar cassette.
- the rotatably mounted contact bridge is movably mounted in the rotor housing in a direction perpendicular to the axis of rotation of the contact bridge.
- first spring pins are on the contact bridge and the first and second plate, and the second ends of the respective spring pairs are attached to the second spring pins and the second spring pins on the first and second plates.
- the two pairs of first and second springs are designed as tension springs.
- the second spring pins are each mounted in a notch of the rotor. This notch may be formed so that the second spring pins are movable in a direction perpendicular to Direction of the contact bridge are mounted in the closed position.
- the second spring pins are floatingly mounted in the rotor.
- the two plates may be floatingly mounted in the rotor.
- the inventive rotor may be part of an electrical switch which additionally comprises two fixed contacts, the rotor cooperating with the two fixed contacts for closing or opening a circuit
- a rotor housing 110 for an electrical switch and a rotatably mounted contact bridge 200, which comprises two movable contacts 210, 220, are shown.
- the two movable contacts 210, 220 cooperate with two fixed contacts of an electrical switch for closing or opening a circuit.
- the rotatably mounted contact bridge 200 is movably mounted in the rotor housing 110 in a direction perpendicular to the direction of the contact bridge 200 in its closed position. According to the Fig. 1C This means that the rotatably mounted contact bridge 200 is arranged movably in the direction of the arrow in the rotor housing 110.
- the rotatably mounted contact bridge 200 may be mounted in a suspension 300, which in turn is movably mounted in the rotor housing 110.
- the rotatably mounted contact bridge 200 is also movably mounted in the rotor housing 110 in a direction perpendicular to the axis of rotation of the contact bridge 200.
- a rotor 100 for an electrical switch is shown.
- the rotor 100 includes a rotor housing 110 and a rotatably mounted contact bridge 200.
- On the contact bridge 200 two movable contacts 210, 220 are mounted.
- the two movable contacts 210, 220 may cooperate with two fixed contacts 2100, 2200 of an electrical switch to close or open a circuit.
- the rotor 100 further comprises a first and a second plate 310, 320, which are located inside the rotor 100 and which are arranged substantially parallel to the contact bridge 200. Between these two plates 310, 320, the rotatably mounted contact bridge 200 is arranged. In the following, the suspension mechanism of the contact bridge 200 in the rotor 100 will be explained in more detail.
- the rotor 100 for this purpose comprises two pairs of first and second spring pins 610, 710; 620, 720 and two pairs of first and second springs 410, 420; 510, 520.
- the first ends of the respective spring pairs 410, 420; 510, 520 are attached to the first spring pins 610, 710.
- These first spring pins 610, 710 rest on the contact bridge 200 and also on the first and second plates 310, 320.
- the second ends of the respective spring pairs 410, 420; 510, 520 are attached to the second spring pins 620, 720.
- These in turn are attached to the plates 310, 320, so that in the closed position of the rotor 100, a minimum contact pressure of the movable contacts 210, 220 of the contact bridge 200 is ensured on the fixed contacts 2100, 2200.
- the rotatably mounted contact bridge 200 is by the train of the first and second spring pairs 410, 420; 520, 520 on the first spring pins 610, 710 as shown in FIG Fig. 2 turned counterclockwise.
- the movable contact 220 is downward and the movable contact 210 upward as shown in FIG Fig. 2 moved, thereby ensuring a minimal contact pressure on the fixed contacts.
- the second spring pins 620, 720 fixed to the first and second plates 310, 320 are movably supported in the rotor 100.
- Fig. 3 is the movable mounting of the second spring pins 620, 720 explained in more detail.
- the second spring pins 620, 720 are each mounted in a notch 150 of the rotor 100. Together with the mounting of the contact bridge 200 in the electrical switch by the guide pin 800, which is guided through a central recess 350 of the two first and second plates 310, 320 and the contact bridge 200, allow the notches 150 that the contact bridge 200 in the closed position is movable perpendicular to this direction. According to the presentation of the Fig. 3 This means that the contact bridge 200 with the movable contacts 210, 220 can move up and down and thereby tolerances - can be compensated - for example, in the contact pieces of the contact bridge 200.
- the central recess 350 is formed as an elongated hole, which is formed along a direction perpendicular to the direction of the contact bridge 200 in the closed position.
- Fig. 4 is the rotor 100 with the contact bridge 200 and the first and second spring pins 610, 710; 620, 720.
- Fig. 5 shows the rotor 100 in a different sectional view than Fig. 2 . 3 or 4 ,
- Fig. 6 shows once again the rotor 100 with the notch 150 in the rotor, which allows the contact bridge 200 are movably mounted together with the two plates 310, 320 in the rotor 100.
- the second spring pins 620, 720 are thus floatingly mounted in the rotor 100.
- the two plates 310, 320 are also floatingly mounted in the rotor 100.
- the two pairs of first and second springs 410, 420; 510, 520 are formed in this embodiment as tension springs.
- the pairs of first and second springs 410, 420; 510, 520 extend from the first spring pins 610, 710 to the second spring pins 620, 720 in parallel with the two plates 310, 320.
- the first and second springs 410, 420; 510, 520 outside of the two plates 310, 320.
- Fig. 7 a force-erosion diagram is shown. Because the floatingly mounted second spring pins 620, 720 allow movement of the rotatably mounted contact bridge 200, regardless of the degree of erosion of the contact pieces, an equal contact force is applied to both movable contacts 210, 220.
- connection tube 850 is guided through the central recess 350 of the contact bridge 200.
- a guide pin 800 serves as a rotation axis of the rotor 100.
- the guide pin 800 is passed through the connection tube 850.
- the diameter of the guide pin 800 may be made small relative to the inner diameter of the connecting tube 850 such that the guide pin 800 can be eccentrically mounted in the connecting tube 850.
- FIG. 9A is the guide pin 800 in the middle of the connecting tube 850, so there is no compensation movement.
- Figs. 9B and 9C differently, here the guide pin 800 is mounted eccentrically in the connecting tube 850 and the contact bridge 200 balances floating asymmetries of the structure.
- the rotor 100 is shown with a first plate 310. This is located in the interior of the rotor 100 and is arranged substantially parallel to the contact bridge 200.
- the contact bridge 200 has a central recess in which the first plate 310 is inserted.
- First plate 310 and contact bridge 200 are rotatable about the guide pin 800.
- the contact bridge 200 may also be formed in two pieces with a recess for the first plate 310th
- Fig. 10B are the two pairs of first and second spring pins 610, 710; 620, 720 and the two pairs of first and second springs 410, 420; 510, 520.
- the first ends of the respective spring pairs 410, 420; 510, 520 are attached to the first spring pins 610, 710 and the first spring pins 610, 710 are on the contact bridge 200 and the first plate 310 on.
- the second ends of the respective spring pairs 410, 420; 510, 520 are fixed to the second spring pins 620, 720 and the second spring pins 620, 720 on the first plate 310, so that in the closed position of the rotor 100, a minimum contact pressure of the movable contacts 210; 220 of the contact bridge 200 on the fixed contacts 2100; 2200 is ensured, wherein the second spring pins 620, 720 are movably mounted in the rotor housing.
- the rotor 100 may be part of an electrical switch, which additionally comprises two fixed contacts 2100, 2200.
- the rotor 100 with the two movable contacts 210, 220 may cooperate with the two fixed contacts 2100, 2200 to close or open a circuit.
- the contact bridge is usually stored stationary in the rotor.
- a compensation of different spring lengths with different tolerances of the components or different lever arms due to a different erosion of the contacts is compensated according to the invention by a floating mounting of the plates 310, 320 which carry the contact bridge 200.
- the lateral plates arranged to the contact bridge are connected to each other.
- the contact bridge rotates coaxially around the tube and is inevitably moved during the compensation movement of the inner rotor. Without this coupling, the inevitability and thus the reproducibility of the compensation result are missing. That leads to that In the case of rapid closing of a circuit breaker, the contact bridge can not join in the full compensation movement of the plates, and as a result system-related unbalanced contact forces can occur, for example due to friction.
Description
Schaltgeräte zum Schalten elektrischer Ströme umfassen typischerweise mindestens ein Kontaktsystem und weitere Gehäuseumbauten. Das Kontaktsystem bildet einen elektrischen Schalter und dient dem Schalten elektrischer Ströme. Eine Klasse von Schaltgeräten sind die sogenannten "Leistungsschalter", die typischerweise Ströme von 100 A und mehr schalten können. Diese Leistungsschalter umfassen ein Gehäuse, in dem die einzelnen Phasen der Ströme geschaltet werden. Die einzelnen Phasen der Ströme können in Polkassetten untergebracht sein, die von einem eigenen Gehäuse eingefasst werden. In den Polkassetten sind Beweg- und Festkontakte untergebracht, die mechanisch getrennt beziehungsweise zusammengebracht werden können, zum Aus- beziehungsweise Einschalten der Ströme. Beim Trennen von Beweg- und Festkontakt einer Polkassette entsteht ein Lichtbogen, der typischerweise in einer sogenannten "Löschkammer" gelöscht wird. Ebenfalls sind Leistungsschalter bekannt, die keine Polkassetten enthalten und die in ihrem Gehäuse Beweg- und Festkontakte unterbringen.Switching devices for switching electric currents typically comprise at least one contact system and further housing conversions. The contact system forms an electrical switch and serves to switch electrical currents. One class of switching devices are the so-called "power switches," which typically can switch currents of 100A and more. These circuit breakers comprise a housing in which the individual phases of the currents are switched. The individual phases of the currents can be housed in Polkassetten, which are enclosed by its own housing. In the Polkassetten moving and fixed contacts are housed, which can be mechanically separated or brought together, for switching off or turning on the currents. When separating movable and fixed contact of a polar cartridge, an arc is formed, which is typically extinguished in a so-called "quenching chamber". Also, circuit breakers are known which contain no Polkassetten and accommodate moving and fixed contacts in their housing.
In Leistungsschaltern ist zur Erzielung einer guten Strombegrenzung notwendig, eine hohe Bogenspannung schnell aufzubauen. Dies gelingt mit sogenannten "Doppelunterbrechern", die die Schaltstrecke zweimal unterteilen und so im Kurzschlussfall zwei Lichtbögen gleichzeitig erzeugen. Die durch den Lichtbogen erzeugte Bogenspannung ist nun in der gleichen Zeiteinheit doppelt vorhanden, was die Strombegrenzung gegenüber einfach unterbrechenden Systemen verbessert. Typischerweise sind bei sogenannten "Doppelunterbrechern" zwei elektrische Kontakte auf einer drehbar gelagerten Kontaktbrücke angeordnet, die die Bewegkontakte darstellen. Die beiden Bewegkontakte wirken mit zwei Festkontakten des elektrischen Schalters zusammen zum Schließen oder Öffnen des Stromkreises.In circuit breakers, to achieve good current limitation, it is necessary to quickly build up a high arc voltage. This is achieved with so-called "double breakers", which divide the switching path twice and thus produce two arcs simultaneously in the event of a short circuit. The arc voltage generated by the arc is now duplicated in the same unit of time, which improves the current limit over systems that break simply. Typically, in so-called "double breakers" two electrical contacts are arranged on a rotatably mounted contact bridge, which represent the moving contacts. The two moving contacts cooperate with two fixed contacts of the electrical switch to close or open the circuit.
In der
In der
Die
Die
Doppeltunterbrechende Kontaktsysteme mit rotatorischem Aufbau sind sehr häufig anfällig gegen Unsymmetrien. Die Unsymmetrien können begründet sein in der Toleranzlage der Bauteile beziehungsweise im unsymmetrischen Abbrand während des Betriebs. Beispielsweise können die Kontaktstücke der Kontaktbrücke unsymmetrisch abbrennen. Diese Unsymmetrien führen zu ungleichen Kontaktkräften und Kontaktwiderständen an den Kontaktstellen. Bisher bekannte Lösungsmöglichkeiten zur Vermeidung dieser Unsymmetrien sehen eine Ausgleichsmöglichkeit durch die bewegliche Kontaktbrücke als auch durch eine schwimmende Anordnung der Schaltwelle beziehungsweise des Rotors in der Polkassette vor.Double-break contact systems with a rotatory structure are very often prone to asymmetries. The asymmetries may be due to the tolerance of the components or unbalanced consumption during operation. For example, the contact pieces of the contact bridge can burn off asymmetrically. These asymmetries lead to unequal contact forces and contact resistance at the contact points. Previously known solutions to avoid these asymmetries provide a compensation possibility by the movable contact bridge as well as by a floating arrangement of the switching shaft or the rotor in the polar cassette.
Es ist Aufgabe der Erfindung, einen Rotor für einen elektrischen Schalter zur Verfügung zu stellen mit einer alternativen Lösung zur Kompensation von Unsymmetrien seiner Kontaktbrücke.It is an object of the invention to provide a rotor for an electrical switch with an alternative solution for the compensation of asymmetries of its contact bridge.
Die Aufgabe wird gelöst gemäß Anspruch 1. In einer Ausgestaltung ist die drehbar gelagerte Kontaktbrücke im Rotorgehäuse in einer Richtung senkrecht zur Drehachse der Kontaktbrücke beweglich gelagert ist.The object is achieved according to claim 1. In one embodiment, the rotatably mounted contact bridge is movably mounted in the rotor housing in a direction perpendicular to the axis of rotation of the contact bridge.
In einer Ausgestaltung liegen die ersten Federstifte auf der Kontaktbrücke und der ersten und zweiten Platte auf, und die zweiten Enden der jeweiligen Federpaare sind an den zweiten Federstiften befestigt sowie die zweiten Federstifte an der ersten und zweiten Platte. In einer Ausgestaltung der Erfindung sind die zwei Paare an ersten und zweiten Federn als Zugfedern ausgebildet.In one embodiment, the first spring pins are on the contact bridge and the first and second plate, and the second ends of the respective spring pairs are attached to the second spring pins and the second spring pins on the first and second plates. In one embodiment of the invention, the two pairs of first and second springs are designed as tension springs.
In einer weiteren Ausgestaltung der Erfindung sind die zweiten Federstifte jeweils in einer Einkerbung des Rotors gelagert. Diese Einkerbung kann so ausgebildet sein, dass die zweiten Federstifte beweglich in einer Richtung senkrecht zur Richtung der Kontaktbrücke in der Schließstellung gelagert sind.In a further embodiment of the invention, the second spring pins are each mounted in a notch of the rotor. This notch may be formed so that the second spring pins are movable in a direction perpendicular to Direction of the contact bridge are mounted in the closed position.
In einer Ausgestaltung der Erfindung sind die zweiten Federstifte schwimmend im Rotor gelagert. Ebenfalls können die zwei Platten schwimmend im Rotor gelagert sein.In one embodiment of the invention, the second spring pins are floatingly mounted in the rotor. Also, the two plates may be floatingly mounted in the rotor.
Der erfinderische Rotor kann Teil eines elektrischen Schalters sein, der zusätzlich zwei feststehende Kontakte umfasst, wobei der Rotor mit den zwei feststehenden Kontakten zusammenwirkt zum Schließen oder Öffnen eines StromkreisesThe inventive rotor may be part of an electrical switch which additionally comprises two fixed contacts, the rotor cooperating with the two fixed contacts for closing or opening a circuit
Die Erfindung wird im Weiteren anhand der
- Fig. 1A, 1B, 1C
- Rotorgehäuse, Kontaktbrücke und schwimmend gelagerte Kontaktbrücke;
- Fig. 2
- Rotor mit Kontaktbrücke, zwei Platten, zwei Paaren an ersten und zweiten Federstiften und zwei Paaren an ersten und zweiten Federn;
- Fig. 3
- Rotor gemäß
Fig. 2 in einer seitlichen Darstellung; - Fig. 4
- Rotor gemäß
Fig. 2 in einer ersten Darstellung; - Fig. 5
- Rotor gemäß
Fig. 2 in einer zweiten Darstellung; - Fig. 6
- Rotor gemäß
Fig. 2 in einer dritten Darstellung; - Fig. 7
- Kraft-Erosions-Diagramm eines erfindungsgemäßen Rotors;
- Fig. 8A, 8B
- Erfindungsgemäßes Rotorgehäuse und Kontaktbrücke mit Verbindungsröhrchen verbundene Platten;
- Fig. 9A, 9B, 9C
- Erfindungsgemäßes Rotorgehäuse und Kontaktbrücke mit Verbindungsröhrchen verbundene Platten; und
- Fig. 10A, 10B
- Kontaktbrücke mit einer Platte.
- Fig. 1A, 1B, 1C
- Rotor housing, contact bridge and floating contact bridge;
- Fig. 2
- Rotor with contact bridge, two plates, two pairs of first and second spring pins and two pairs of first and second springs;
- Fig. 3
- Rotor according to
Fig. 2 in a side view; - Fig. 4
- Rotor according to
Fig. 2 in a first presentation; - Fig. 5
- Rotor according to
Fig. 2 in a second presentation; - Fig. 6
- Rotor according to
Fig. 2 in a third presentation; - Fig. 7
- Force erosion diagram of a rotor according to the invention;
- 8A, 8B
- Inventive rotor housing and contact bridge with connecting tubes connected plates;
- Figs. 9A, 9B, 9C
- Inventive rotor housing and contact bridge with connecting tubes connected plates; and
- 10A, 10B
- Contact bridge with a plate.
In den
Die drehbar gelagerte Kontaktbrücke 200 ist im Rotorgehäuse 110 in einer Richtung senkrecht zur Richtung der Kontaktbrücke 200 in ihrer Schließ-Stellung beweglich gelagert. Entsprechend der
Die drehbar gelagerte Kontaktbrücke 200 kann in einer Aufhängung 300 gelagert sein, welche wiederum beweglich im Rotorgehäuse 110 gelagert ist.The rotatably mounted
Die drehbar gelagerte Kontaktbrücke 200 ist ebenso im Rotorgehäuse 110 in einer Richtung senkrecht zur Drehachse der Kontaktbrücke 200 beweglich gelagert.The rotatably mounted
In
Der Rotor 100 umfasst des Weiteren eine erste und eine zweite Platte 310, 320, die sich im Innern des Rotors 100 befinden und die im Wesentlichen parallel zur Kontaktbrücke 200 angeordnet sind. Zwischen diesen zwei Platten 310, 320 ist die drehbar gelagerte Kontaktbrücke 200 angeordnet. Im Weiteren wird der Aufhängungsmechanismus der Kontaktbrücke 200 im Rotor 100 näher erläutert.The
Der Rotor 100 umfasst dazu zwei Paare an ersten und zweiten Federstiften 610, 710; 620, 720 und zwei Paare an ersten und zweiten Federn 410, 420; 510, 520. Die ersten Enden der jeweiligen Federpaare 410, 420; 510, 520 sind an den ersten Federstiften 610, 710 befestigt. Diese ersten Federstifte 610, 710 liegen auf der Kontaktbrücke 200 und ebenso auf den ersten und zweiten Platten 310, 320 auf. Die zweiten Enden der jeweiligen Federpaare 410, 420; 510, 520 sind an den zweiten Federstiften 620, 720 befestigt. Diese wiederum sind an den Platten 310, 320 befestigt, so dass in der Schließ-Stellung des Rotors 100 ein minimaler Kontaktdruck der beweglichen Kontakte 210, 220 der Kontaktbrücke 200 auf die feststehenden Kontakte 2100, 2200 gewährleistet ist.The
Die drehbare gelagerte Kontaktbrücke 200 wird durch den Zug der ersten und zweiten Federpaare 410, 420; 520, 520 auf die ersten Federstifte 610, 710 entsprechend der Darstellung in
Die zweiten Federstifte 620, 720, die an den ersten und zweiten Platten 310, 320 befestigt sind, sind im Rotor 100 beweglich gelagert.The second spring pins 620, 720 fixed to the first and
In
Die Mittelaussparung 350 ist als Langloch ausgebildet, welches sich entlang einer Richtung senkrecht zur Richtung der Kontaktbrücke 200 in der Schließ-Stellung ausgebildet ist.The
In der
Die zwei Paare an ersten und zweiten Federn 410, 420; 510, 520 sind in diesem Ausführungsbeispiel als Zugfedern ausgebildet. Die Paare an ersten und zweiten Federn 410, 420; 510, 520 verlaufen von den ersten Federstiften 610, 710 zu den zweiten Federstiften 620, 720 parallel zu den zwei Platten 310, 320. Entsprechend der dargestellten Ausführung verlaufen die ersten und zweiten Federn 410, 420; 510, 520 außerhalb der zwei Platten 310, 320.The two pairs of first and
In
In den
Ein Führungsstift 800 dient als Drehachse des Rotors 100. Der Führungsstift 800 ist durch das Verbindungsröhrchen 850 geführt. Der Durchmesser des Führungsstifts 800 kann so klein im Vergleich zum Innendurchmesser des Verbindungsröhrchens 850 ausgebildet sein, dass der Führungsstift 800 exzentrisch im Verbindungsröhrchen 850 gelagert werden kann.A
Dies ist näher in den
In den
In
Der erfindungsgemäße Rotor 100 (
Bisher wird üblicherweise die Kontaktbrücke ortsfest im Rotor gelagert. Ein Ausgleich von unterschiedlichen Federlängen bei unterschiedlichen Toleranzen der Bauteile oder unterschiedlicher Hebelarme auf Grund eines unterschiedlichen Abbrands der Kontakte wird erfindungsgemäß durch eine schwimmende Lagerung der Platten 310, 320, die die Kontaktbrücke 200 tragen, ausgeglichen.So far, the contact bridge is usually stored stationary in the rotor. A compensation of different spring lengths with different tolerances of the components or different lever arms due to a different erosion of the contacts is compensated according to the invention by a floating mounting of the
Durch Einführung eines Verbindungsröhrchens werden die seitlichen zur Kontaktbrücke angeordneten Platten miteinander verbunden. Damit wird ein stabiler innerer Rotor mit reduzierten Freiheitsgraden geschaffen. Die Kontaktbrücke dreht koaxial um das Röhrchen und wird zwangsläufig bei der Ausgleichsbewegung des Inneren Rotors mitbewegt. Ohne diese Kopplung fehlt die Zwangsläufigkeit und damit die Reproduzierbarkeit des Ausgleichsergebnisses. Das führt dazu, dass bei den schnellen Einschaltvorgängen eines Leistungsschalters, die Kontaktbrücke nicht die volle Ausgleichbewegung der Platten mitmachen kann und es somit systembedingt zu unsymmetrischen Kontaktkräften kommen kann, z.B. auf Grund von Reibung.By inserting a connecting tube, the lateral plates arranged to the contact bridge are connected to each other. This creates a stable inner rotor with reduced degrees of freedom. The contact bridge rotates coaxially around the tube and is inevitably moved during the compensation movement of the inner rotor. Without this coupling, the inevitability and thus the reproducibility of the compensation result are missing. That leads to that In the case of rapid closing of a circuit breaker, the contact bridge can not join in the full compensation movement of the plates, and as a result system-related unbalanced contact forces can occur, for example due to friction.
Claims (11)
- Rotor (100) for an electric switch, comprising a rotor housing (110) and a rotatably mounted contact bridge (200), which comprises two movable contacts (210; 220), wherein, by the rotation of the rotor (100), the two movable contacts (210; 220) interact with two fixed contacts (2100; 2200) of an electric switch in order to close or open a circuit, wherein the rotatably mounted contact bridge (200) is movably mounted in the rotor housing (110) in a direction perpendicular to the direction of the contact bridge (200) in its closed position; wherein the rotor (100) further comprises:a first plate (310) in the interior of the rotor housing (110), which is arranged essentially parallel to the contact bridge (200);a second plate (320) in the interior of the rotor housing (110), which is arranged essentially parallel to the contact bridge (200) and to the first plate (310);two pairs of first and second spring pins (610, 710; 620, 720); andtwo pairs of first and second springs (410, 420; 510, 520), wherein the first ends of the respective pairs of springs (410, 420; 510, 520) are secured to the first spring pins (610, 710), and the first spring pins (610, 710) lie on the contact bridge (200) and the first plate (310), and wherein the second ends of the respective pairs of springs (410, 420; 510, 520) are secured to the second spring pins (620, 720), and the second spring pins (620, 720) to the first plate (310), such that, in the closed position of the rotor (100), a minimum contact pressure of the movable contacts (210; 220) of the contact bridge (200) onto the fixed contacts (2100; 2200) is guaranteed, wherein the second spring pins (620, 720) are movably mounted in the rotor housing,characterised in that
the two plates (310; 320) are connected to each other by a connection tube (850), and the connection tube (850) is guided through a middle recess (350) of the contact bridge (200) ;
wherein the rotor (100) further comprises a guide pin (800) as the axis of rotation of the rotor (100), which is guided through the connection tube (850);
and wherein the diameter of the guide pin (800) is formed so small in comparison with the internal diameter of the connection tube (850) that the guide pin (800) can be mounted eccentrically in the connection tube (850). - Rotor (100) for an electric switch according to claim 1, in which the rotatably mounted contact bridge (200) is movably mounted in the rotor housing (110) in a direction perpendicular to the axis of rotation of the contact bridge (200).
- Rotor (100) according to claim 1 or 2, wherein the first spring pins (610, 710) lie on the contact bridge (200) and the first and second plate (310; 320), and wherein the second ends of the respective pairs of springs (410, 420; 510, 520) are secured to the second spring pins (620, 720) and the second spring pins (620, 720) to the first and second plate (310; 320).
- Rotor (100) according to claim 1, 2 or 3, in which the two pairs of first and second springs (410, 420; 510, 520) are formed as tensions springs.
- Rotor (100) according to claim 1, 2, 3 or 4, in which the two plates (310; 320) and the contact bridge (200) exhibit a middle recess (350) through which the guide pin (800) can be guided, which serves as an axis of rotation of the rotor (100).
- Rotor (100) according to claim 5, in which the middle recess (350) is formed as a longitudinal hole along a direction perpendicular to the direction of the contact bridge (200) in the closed position.
- Rotor (100) according to one of the previous claims, in which the second spring pins (620, 720) are mounted in each case in a notch (150) of the rotor (100).
- Rotor (100) according to claim 7, in which the second spring pins (620, 720) are movably mounted in a direction perpendicular to the direction of the contact bridge (200) in the closed position.
- Rotor (100) according to one of the previous claims, in which the second spring pins (620, 720) are mounted floating in the rotor (100).
- Rotor (100) according to one of the previous claims, in which the two plates (310; 320) are mounted floating in the rotor (100).
- Electric switch comprising a rotor (100) according to one of the previous claims, and two fixed contacts (2100; 2200), wherein the rotor (100) interacts with the two fixed contacts (2100; 2200) for opening or closing a circuit.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102012215321 | 2012-08-29 | ||
DE102013208373.4A DE102013208373A1 (en) | 2012-08-29 | 2013-05-07 | Rotor for an electric switch |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2704172A1 EP2704172A1 (en) | 2014-03-05 |
EP2704172B1 true EP2704172B1 (en) | 2017-05-31 |
Family
ID=48998408
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13179355.6A Not-in-force EP2704172B1 (en) | 2012-08-29 | 2013-08-06 | Rotor for an electrical switch |
Country Status (4)
Country | Link |
---|---|
US (1) | US9299518B2 (en) |
EP (1) | EP2704172B1 (en) |
CN (1) | CN103681131B (en) |
DE (1) | DE102013208373A1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102013217255A1 (en) * | 2013-08-29 | 2015-03-05 | Siemens Aktiengesellschaft | Rotor for an electrical switch |
DE102014204749A1 (en) * | 2014-03-14 | 2015-09-17 | Siemens Aktiengesellschaft | Switching device of an electrical circuit breaker with a power transmission element and a holding element |
DE102014224623A1 (en) | 2014-12-02 | 2016-06-16 | Siemens Aktiengesellschaft | Rotor and electromechanical switching device with a rotor |
DE102014224624A1 (en) | 2014-12-02 | 2016-06-02 | Siemens Aktiengesellschaft | Rotor and electromechanical switching device with a rotor |
DE102014224622A1 (en) | 2014-12-02 | 2016-06-02 | Siemens Aktiengesellschaft | Rotor and electromechanical switching device with a rotor |
KR101904877B1 (en) * | 2017-04-10 | 2018-10-08 | 엘에스산전 주식회사 | Movable Contact Assembly for Circuit Breaker |
GB2571365A (en) * | 2018-02-23 | 2019-08-28 | Eaton Intelligent Power Ltd | Electrical Switchgear |
CN111769014B (en) * | 2020-06-06 | 2022-05-13 | 武汉船用电力推进装置研究所(中国船舶重工集团公司第七一二研究所) | Rotary multi-contact-finger contact structure |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6403901B1 (en) * | 1999-07-17 | 2002-06-11 | Moeller Gmbh | Spring biased contact system including a rotatable symmetrical contact with two lever arms |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH96076A (en) * | 1921-04-23 | 1922-09-01 | Bbc Brown Boveri & Cie | Switching method. |
US2588632A (en) * | 1947-04-19 | 1952-03-11 | Max L Jeffrey | Switch |
DE3431288A1 (en) * | 1984-08-23 | 1986-03-06 | Siemens AG, 1000 Berlin und 8000 München | CONTACT ARRANGEMENT FOR LOW VOLTAGE CIRCUIT BREAKERS WITH A TWO-ARM CONTACT LEVER |
FR2622347B1 (en) * | 1987-10-26 | 1995-04-14 | Merlin Gerin | CUTTING DEVICE FOR A MULTIPOLAR CIRCUIT BREAKER WITH DOUBLE ROTARY CONTACT |
FR2682531B1 (en) | 1991-10-15 | 1993-11-26 | Merlin Gerin | MULTIPOLAR CIRCUIT BREAKER WITH SINGLE POLE BLOCKS. |
FR2688626B1 (en) | 1992-03-13 | 1994-05-06 | Merlin Gerin | CIRCUIT BREAKER WITH MOLDED BOX WITH BRIDGE OF BRAKE CONTACTS AT THE END OF PULSE STROKE. |
IT1292453B1 (en) * | 1997-07-02 | 1999-02-08 | Aeg Niederspannungstech Gmbh | ROTATING GROUP OF CONTACTS FOR HIGH FLOW SWITCHES |
US6310307B1 (en) * | 1999-12-17 | 2001-10-30 | General Electric Company | Circuit breaker rotary contact arm arrangement |
ITMI20012325A1 (en) * | 2001-11-06 | 2003-05-06 | Abb Service Srl | LOW VOLTAGE SWITCH |
US7977592B2 (en) * | 2007-09-11 | 2011-07-12 | Siemens Industry, Inc. | Double break disconnect/contact system |
DE102008049442B4 (en) * | 2008-09-29 | 2015-02-19 | Siemens Aktiengesellschaft | Rotary contact system for a switching device, in particular for a power switching device, with a radially applied from the inside closing torque |
DE102010035625A1 (en) * | 2010-08-24 | 2012-03-01 | Siemens Aktiengesellschaft | Electric switch and method for mounting a switching unit of an electrical switch |
DE102011086307A1 (en) * | 2011-11-14 | 2013-05-16 | Siemens Aktiengesellschaft | Electric switch |
-
2013
- 2013-05-07 DE DE102013208373.4A patent/DE102013208373A1/en not_active Withdrawn
- 2013-08-06 EP EP13179355.6A patent/EP2704172B1/en not_active Not-in-force
- 2013-08-26 US US13/975,594 patent/US9299518B2/en active Active
- 2013-08-29 CN CN201310383691.3A patent/CN103681131B/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6403901B1 (en) * | 1999-07-17 | 2002-06-11 | Moeller Gmbh | Spring biased contact system including a rotatable symmetrical contact with two lever arms |
Also Published As
Publication number | Publication date |
---|---|
CN103681131B (en) | 2017-12-19 |
CN103681131A (en) | 2014-03-26 |
EP2704172A1 (en) | 2014-03-05 |
US20140061015A1 (en) | 2014-03-06 |
US9299518B2 (en) | 2016-03-29 |
DE102013208373A1 (en) | 2014-03-06 |
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