EP1665304A1 - Device for actuating an electrical switchgear - Google Patents

Device for actuating an electrical switchgear

Info

Publication number
EP1665304A1
EP1665304A1 EP03750542A EP03750542A EP1665304A1 EP 1665304 A1 EP1665304 A1 EP 1665304A1 EP 03750542 A EP03750542 A EP 03750542A EP 03750542 A EP03750542 A EP 03750542A EP 1665304 A1 EP1665304 A1 EP 1665304A1
Authority
EP
European Patent Office
Prior art keywords
electric motor
drive shaft
rotary shaft
lever
switching
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP03750542A
Other languages
German (de)
French (fr)
Other versions
EP1665304B1 (en
Inventor
Franz-Josef Körber
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ABB Technology AG
Original Assignee
ABB Technology AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by ABB Technology AG filed Critical ABB Technology AG
Publication of EP1665304A1 publication Critical patent/EP1665304A1/en
Application granted granted Critical
Publication of EP1665304B1 publication Critical patent/EP1665304B1/en
Anticipated expiration legal-status Critical
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Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/26—Power arrangements internal to the switch for operating the driving mechanism using dynamo-electric motor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H3/36—Driving mechanisms, i.e. for transmitting driving force to the contacts using belt, chain, or cord
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H3/46—Driving mechanisms, i.e. for transmitting driving force to the contacts using rod or lever linkage, e.g. toggle

Definitions

  • the invention relates to a device for actuating an electrical switching device, in particular a high-voltage circuit breaker, according to the preamble of claim 1.
  • the invention further relates to a switching device, in particular a high-voltage circuit breaker, with an actuating device according to the invention.
  • circuit breakers have a switching chamber with a fixed and a movable contact piece.
  • the movable contact piece is attached to one end of an insulating rod, the other end of which is connected to one end of an actuating lever.
  • the other end of the actuating lever is fastened to a rotary shaft, so that the movable contact piece is moved towards or away from the fixed contact piece by rotation of the rotary shaft.
  • the length of the actuating lever is dimensioned such that the circuit breaker is switched on and off by rotating the rotary shaft by a certain angle.
  • the rotary shaft is often set in rotation by means of a mechanical or hydromechanical spring-loaded drive; the drive is coupled to one end of a connecting rod which is connected to the rotary shaft of the circuit breaker via a further lever.
  • a linear or approximately linear movement of the drive by a certain stroke causes the rotary shaft to rotate by the predetermined angle and thus a switching operation.
  • a mechanical or hydromechanical spring accumulator drive of this type has an energy store, which is in the form of a mechanical spring accumulator, for example of coil springs, coil springs, torsion springs or disc springs.
  • This spring accumulator is tensioned with the help of an elevator motor.
  • the spring accumulator is relaxed by releasing a latch or by actuating a control valve, as a result of which the spring energy is transmitted to the connecting rod via a transmission or via a hydraulic transmission medium and thus exerts the required stroke on the connecting rod.
  • Such spring-loaded drives have a comparatively complex structure made up of many individual moving parts and require a comparatively large amount of space.
  • mechanically moved and frictional parts generally require regular maintenance and checks.
  • the invention has for its object to provide a device for actuating a switching device, which has a simple structure with a smaller footprint and is low maintenance. It is also an object of the invention to provide a corresponding switching device.
  • an electric motor with a rotating drive shaft which can be coupled to the rotary shaft of the switching device via a gear, is provided for driving a rotary shaft of an electrical switching device, in particular a high-voltage circuit breaker.
  • an electric motor has a comparatively simple structure and requires less space. The effort for its maintenance compared to a spring-loaded drive is also reduced.
  • the use of a gearbox means that the torque that is transferred to the rotary shaft of the switching device is greater than the torque that the electric motor has to apply. This means that the design, and thus the space required, can be further reduced compared to an electric motor that drives the rotary shaft directly.
  • a motor is provided for driving all switch poles.
  • a separate electric motor for driving each switch pole can also be provided.
  • the central axis of the drive shaft of the electric motor runs parallel to the central axis of the rotary shaft, which is why the spatial arrangement of the electric motor is not determined by the position of the rotary shaft.
  • the electric motor is designed as a servo motor.
  • a servomotor has the advantage over other electric motors that a comparatively precise rotation through a predetermined angle can be carried out by appropriate control. Furthermore, a servo motor delivers a comparatively high torque, especially in short-time operation.
  • the transmission is designed as a lever transmission ⁇ .
  • a lever mechanism which is also referred to as a four-link swivel or a crank arm, is reliable and requires little maintenance.
  • the lever mechanism can advantageously be dimensioned such that a rotation of the drive shaft of the electric motor by 180 ° causes a switching operation.
  • a rotation of the drive shaft of the electric motor by 180 ° causes a switching operation.
  • the electric motor must apply a correspondingly higher torque. With a rotation of 180 °, the torque to be applied by the electric motor is minimal.
  • an intermediate piece which is preferably designed as a circular disk, is fastened to the drive shaft of the electric motor, the end of the connecting rod facing the drive shaft being connectable to the intermediate piece at least two distances from the central axis of the drive shaft.
  • the lever gear can be adjusted to different output angles by attaching the connecting rod at a suitable distance from the central axis of the drive shaft.
  • the transmission can be designed as a toothed belt drive, which is also comparatively reliable and requires little maintenance.
  • the toothed belt drive advantageously has a transmission ratio of 1: 1 to 1: 6, preferably 1: 3.5.
  • the drive shaft of the electric motor will rotate by 70 ° to 420 °, preferably 245 °.
  • a small angle of rotation of the drive shaft requires a high torque of the electric motor, and a large angle of rotation requires a high angular velocity.
  • a practically desirable average is a rotation angle of approximately 245 °, i.e. a gear ratio of 1: 3.5.
  • a switching device in particular a high-voltage circuit breaker, is claimed with an actuating device according to the invention.
  • the actuating device can also be applied to other high, medium and low voltage switching devices, for example circuit breakers, disconnectors, earth electrodes and load disconnectors.
  • FIG. 1 shows an actuating device according to the invention with a lever mechanism when the switching device is switched off
  • FIG. 2 shows an actuating device according to the invention with a lever mechanism when the switching device is switched on
  • FIG. 3 shows a circular disk with a plurality of fastening options
  • actuating device in Fig. 1, is shown with a lever gear when the switching device is switched off.
  • a first lever 16 is fastened transversely to the drive shaft 18, which is connected via a connecting rod 14 acts on a second lever 12 which is attached to a rotary shaft 10 of a switching device transversely to the rotary shaft 10.
  • an actuating lever 42 is also fastened transversely to the rotary shaft 10 on the gas space side and actuates a movable contact piece of a switching chamber 40 via an insulating rod 44.
  • the switching chamber 40 is only shown symbolically.
  • An imaginary connecting line V runs through the central axis of the drive shaft 18 and the central axis of the rotary shaft 10.
  • An imaginary center line M intersects the connecting line V and the central axis of the rotary shaft 10 at right angles.
  • the second lever 12 is inclined at an acute angle ⁇ relative to the center line M.
  • the end of the second lever 12 connected to the connecting rod 14 is located on the side of the center line M facing away from the drive shaft 18.
  • the first lever 16 is aligned with the connecting line V, with its end connected to the connecting rod 14 pointing in the direction of the rotary shaft 10 ,
  • the first lever 16 is rotated by the drive shaft 18 through an angle ⁇ , in this case 180 °. During this rotation, the first lever 16, the connecting rod 14 and the second lever 12 are always on the same side of the connecting line V.
  • FIG. 2 shows the actuating device from FIG. 1 with the switching device switched on, as can be seen from the symbol of the switching chamber 40.
  • the first lever 16 is again aligned with the connecting line V, but its end connected to the connecting rod 14 points away from the rotary shaft 10.
  • the second lever 12 is again inclined by the angle ⁇ relative to the center line M, but its end connected to the connecting rod 14 is located on the side of the center line M facing the drive shaft 18.
  • the first lever 16 is rotated by the drive shaft 18 through the angle ⁇ , in this case 180 °, in the opposite direction as when switching on. A rotation of the first lever 16 by 180 ° thus causes a rotation of the second lever by 2 * ⁇ .
  • L1 L2 * sin ( ⁇ )
  • L1 represents the length of the first lever 16 and L2 the length of the second lever 12.
  • the length of the connecting rod 14 is to be selected to be greater than the length of the second lever 12.
  • FIG. 3 an intermediate piece in the form of a circular disc 26 with several attachment options for a connecting rod 14 is shown.
  • the circular disk 26 is mounted on the drive shaft 18 of the electric motor, the central axes of the circular disk 26 and the drive shaft 18 being aligned with one another.
  • the circular disk 26 here has four bores 31, 32, 33 and 34, which are each provided at a different radial distance from the central axis of the circular disk 26 and serve as a fastening option for the connecting rod 14.
  • the connecting rod 14 also has a bore, for example, so that the circular disk 26 and the connecting rod 14 can be connected with the aid of a bolt.
  • the radial distance of the bore 31, 32, 33 or 34, with which the connecting rod 14 is connected, from the central axis of the drive shaft 18 corresponds to the length L1 of the first lever 16 in FIGS. 1 and 2.
  • the arrangement of the bores on the circular disk can be freely selected, as illustrated, for example, by the arrangement of a first bore 31 and a second bore 32.
  • a third bore 33 and a fourth bore 34 are arranged, for example, such that their centers are aligned with the center axis of the drive shaft 18.
  • the design of the intermediate piece is not limited to the shape described here as a circular disk, rather the intermediate piece can be, for example, as Circle segment, as an oval, as a rod, as a triangle, as a rectangle or in another form.
  • FIG. 4 shows an actuating device according to the invention with a toothed belt drive.
  • a first pulley 24 is mounted on the drive shaft 18 of the electric motor and a second pulley 22 on the rotary shaft 10 of the switching device.
  • a toothed belt 20 is tensioned around the pulleys 22 and 24.
  • An actuating lever 42 is also fastened to the rotary shaft 10 transversely to the rotary shaft 10 and actuates a movable contact piece of a switching chamber 40 via an insulating rod 44.
  • the switching chamber 40 is only shown symbolically.
  • the gear ratio of the toothed belt drive results as the quotient of the radius of the first pulley 24 and the radius of the second pulley 22. If the gear ratio is 1: 3, then a switching operation takes place in which the rotary shaft 10 is to be rotated, for example, by 70 ° a rotation of the drive shaft 18 by 210 °.
  • Isolating rod ⁇ angle of rotation of the rotating shaft ß: angle of rotation of the drive shaft

Abstract

The invention relates to a device for actuating an electrical switchgear comprising at least one mobile contact point driven by a rotary shaft. According to the invention, an electric motor comprising a rotating drive shaft can be coupled to the rotary shaft by means of a transmission, in order to drive the same.

Description

Vorrichtung zur Betätigung eines elektrischen Schaltgerätes Device for actuating an electrical switching device
Beschreibungdescription
Die Erfindung betrifft eine Vorrichtung zur Betätigung eines elektrischen Schaltgerätes, insbesondere eines Hochspannungsleistungsschalters, nach dem Oberbegriff des Anspruchs 1.The invention relates to a device for actuating an electrical switching device, in particular a high-voltage circuit breaker, according to the preamble of claim 1.
Die Erfindung betrifft weiterhin ein Schaltgerät, insbesondere einen Hochspannungs- leistungsschalter, mit einer erfindungsgemäßen Betätigungsvorrichtung.The invention further relates to a switching device, in particular a high-voltage circuit breaker, with an actuating device according to the invention.
Herkömmliche Leistungsschalter weisen eine Schaltkammer mit einem festen und einem beweglichen Kontaktstück auf. Das bewegliche Kontaktstück ist dabei an einem Ende einer Isolierstange befestigt, deren anderes Ende mit einem Ende eines Betätigungshebels verbunden ist. Das andere Ende des Betätigungshebels ist an einer Drehwelle befestigt, so dass durch eine Drehung der Drehwelle das bewegliche Kontaktstück zum festen Kontaktstück hin, beziehungsweise von diesem weg bewegt wird. Die Länge des Betätigungshebels ist so bemessen, dass durch eine Drehung der Drehwelle um einen bestimmten Winkel der Leistungsschalter ein-, beziehungsweise ausgeschaltet wird.Conventional circuit breakers have a switching chamber with a fixed and a movable contact piece. The movable contact piece is attached to one end of an insulating rod, the other end of which is connected to one end of an actuating lever. The other end of the actuating lever is fastened to a rotary shaft, so that the movable contact piece is moved towards or away from the fixed contact piece by rotation of the rotary shaft. The length of the actuating lever is dimensioned such that the circuit breaker is switched on and off by rotating the rotary shaft by a certain angle.
Die Drehwelle wird häufig mittels eines mechanischen oder hydromechanischen Federspeicherantriebes in Drehung versetzt; der Antrieb ist mit einem Ende einer Pleuelstange gekoppelt, die über einen weiteren Hebel mit der Drehwelle des Leistungsschalters verbunden ist. Eine lineare oder annähernd lineare Bewegung des Antriebes um einen bestimmten Hub bewirkt dabei eine Drehung der Drehwelle um den vorgegebenen Winkel und somit einen Schaltvorgang.The rotary shaft is often set in rotation by means of a mechanical or hydromechanical spring-loaded drive; the drive is coupled to one end of a connecting rod which is connected to the rotary shaft of the circuit breaker via a further lever. A linear or approximately linear movement of the drive by a certain stroke causes the rotary shaft to rotate by the predetermined angle and thus a switching operation.
Ein mechanischer oder hydromechanischer Federspeicherantrieb dieser Art weist einen Energiespeicher auf, welcher beispielsweise als mechanischer Federspeicher in Form von Schraubenfedern, Spiralfedern, Torsionsfedern oder Tellerfedern ausgeführt ist. Dieser Federspeicher wird mit Hilfe eines Aufzugmotors gespannt.A mechanical or hydromechanical spring accumulator drive of this type has an energy store, which is in the form of a mechanical spring accumulator, for example of coil springs, coil springs, torsion springs or disc springs. This spring accumulator is tensioned with the help of an elevator motor.
Zur Durchführung eines Schaltvorgangs wird der Federspeicher durch Lösen einer Verklinkung, beziehungsweise durch Betätigung eines Steuerventils, entspannt, wodurch die Federenergie über ein Getriebe, beziehungsweise über ein hydraulisches Übertragungsmedium, auf die Pleuelstange übertragen wird und so den erforderlichen Hub auf die Pleuelstange ausübt.To carry out a switching operation, the spring accumulator is relaxed by releasing a latch or by actuating a control valve, as a result of which the spring energy is transmitted to the connecting rod via a transmission or via a hydraulic transmission medium and thus exerts the required stroke on the connecting rod.
Solche Federspeicherantriebe weisen einen vergleichsweise komplexen Aufbau aus vielen einzelnen bewegten Teilen auf und haben einen vergleichsweise hohen Platzbedarf. Weiterhin benötigen solche mechanisch bewegten und reibungsbehafteten Teile prinzipiell regelmäßige Wartung und Kontrollen.Such spring-loaded drives have a comparatively complex structure made up of many individual moving parts and require a comparatively large amount of space. In addition, such mechanically moved and frictional parts generally require regular maintenance and checks.
Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung zur Betätigung eines Schaltgerätes zu schaffen, die einen einfachen Aufbau mit geringerem Platzbedarf aufweist und wartungsarm ist. Auch ist es Aufgabe der Erfindung, ein entsprechendes Schaltgerät anzugeben.The invention has for its object to provide a device for actuating a switching device, which has a simple structure with a smaller footprint and is low maintenance. It is also an object of the invention to provide a corresponding switching device.
Die Aufgabe wird erfindungsgemäß durch eine Betätigungsvorrichtung mit den im Anspruch 1 angegebenen Merkmalen gelöst. Weitere vorteilhafte Ausgestaltungen, sowie ein entsprechendes Schaltgerät, sind in den weiteren Ansprüchen angegeben.The object is achieved by an actuating device with the features specified in claim 1. Further advantageous refinements, as well as a corresponding switching device, are specified in the further claims.
Erfindungsgemäß wird zum Antrieb einer Drehwelle eines elektrischen Schaltgerätes, insbesondere eines Hochspannungsleistungsschalters, ein Elektromotor mit einer rotierenden Antriebswelle, die über ein Getriebe mit der Drehwelle des Schaltgerätes koppelbar ist, vorgesehen. Im Vergleich zu einem mechanischen oder hydromechanischen Federspeicherantrieb weist ein Elektromotor einen vergleichsweise einfachen Aufbau auf und hat einen geringeren Platzbedarf. Auch ist der Aufwand für seine Wartung gegenüber einem Federspeicherantrieb verringert. Der Einsatz eines Getriebes bewirkt, dass das Drehmoment, das auf die Drehwelle des Schaltgerätes übertragen wird, größer ist als das Drehmoment, das der Elektromotor aufbringen muss. Somit lässt sich die Bauform, und damit auch der Platzbedarf, gegenüber einem Elektromotor, der die Drehwelle direkt antreibt, weiter verringern. Bei mehrpoligen, insbesondere dreipoligen, Schaltgeräten wird ein Motor zum Antrieb aller Schalterpole vorgesehen.According to the invention, an electric motor with a rotating drive shaft, which can be coupled to the rotary shaft of the switching device via a gear, is provided for driving a rotary shaft of an electrical switching device, in particular a high-voltage circuit breaker. In comparison to a mechanical or hydromechanical spring-loaded drive, an electric motor has a comparatively simple structure and requires less space. The effort for its maintenance compared to a spring-loaded drive is also reduced. The use of a gearbox means that the torque that is transferred to the rotary shaft of the switching device is greater than the torque that the electric motor has to apply. This means that the design, and thus the space required, can be further reduced compared to an electric motor that drives the rotary shaft directly. In the case of multi-pole, in particular three-pole, switching devices, a motor is provided for driving all switch poles.
Alternativ ist bei mehrpoligen, insbesondere dreipoligen, Schaltgeräten auch ein separater Elektromotor zum Antrieb jedes Schalterpols vorsehbar.Alternatively, in the case of multi-pole, in particular three-pole, switching devices, a separate electric motor for driving each switch pole can also be provided.
Die Mittelachse der Antriebswelle des Elektromotors verläuft parallel zu der Mittelachse der Drehwelle, weswegen die räumliche Anordnung des Elektromotors nicht durch die Lage der Drehwelle festgelegt ist.The central axis of the drive shaft of the electric motor runs parallel to the central axis of the rotary shaft, which is why the spatial arrangement of the electric motor is not determined by the position of the rotary shaft.
In einer vorteilhaften Ausgestaltung der Erfindung ist der Elektromotor als Servomotor ausgeführt. Ein Servomotor bietet gegenüber anderen Elektromotoren den Vorteil, dass durch entsprechende Ansteuerung eine vergleichsweise genaue Drehung um einen vorgegebenen Winkel ausführbar ist. Weiterhin liefert ein Servomotor, insbesondere im Kurzzeitbetrieb, ein vergleichsweise hohes Drehmoment.In an advantageous embodiment of the invention, the electric motor is designed as a servo motor. A servomotor has the advantage over other electric motors that a comparatively precise rotation through a predetermined angle can be carried out by appropriate control. Furthermore, a servo motor delivers a comparatively high torque, especially in short-time operation.
Gemäß einer vorteilhaften Ausführungsform ist das Getriebe als Hebelgetriebe ausgeτ führt. Ein solches Hebelgetriebe, welches auch als viergliedriges Drehgelenk oder als Kurbelschwinge bezeichnet wird, ist zuverlässig und wartungsarm.According to an advantageous embodiment, the transmission is designed as a lever transmission τ . Such a lever mechanism, which is also referred to as a four-link swivel or a crank arm, is reliable and requires little maintenance.
Vorteilhafterweise kann das Hebelgetriebe so bemessen sein, dass eine Drehung der Antriebswelle des Elektromotors um 180° einen Schaltvorgang bewirkt. Es besteht auch die Möglichkeit, das Hebelgetriebe so bemessen, dass eine Drehung der Antriebswelle des Elektromotors um weniger als 180°, beispielsweise 90°, einen Schaltvorgang bewirkt. In einem solchen Fall muss der Elektromotor jedoch ein entsprechend höheres Drehmoment aufbringen. Bei einer Drehung um 180° ist das vom Elektromotor aufzubringende Drehmoment minimal.The lever mechanism can advantageously be dimensioned such that a rotation of the drive shaft of the electric motor by 180 ° causes a switching operation. There is also the possibility of dimensioning the lever gear such that rotation of the drive shaft of the electric motor by less than 180 °, for example 90 °, causes a switching operation. In such a case, however, the electric motor must apply a correspondingly higher torque. With a rotation of 180 °, the torque to be applied by the electric motor is minimal.
In einer vorteilhaften Weiterbildung ist auf der Antriebswelle des Elektromotors ein Zwischenstück, das vorzugsweise als Kreisscheibe ausgeführt ist, befestigt, wobei das der Antriebswelle zugewandte Ende der Pleuelstange in wenigstens zwei Abständen zur Mittelachse der Antriebswelle an dem Zwischenstück anschließbar ist. Auf diese Art lässt sich das Hebelgetriebe durch Befestigung der Pleuelstange in einem geeigneten Abstand zur Mittelachse der Antriebswelle auf verschiedene Abtriebswinkel einstellen.In an advantageous development, an intermediate piece, which is preferably designed as a circular disk, is fastened to the drive shaft of the electric motor, the end of the connecting rod facing the drive shaft being connectable to the intermediate piece at least two distances from the central axis of the drive shaft. In this manner the lever gear can be adjusted to different output angles by attaching the connecting rod at a suitable distance from the central axis of the drive shaft.
Gemäß einer alternativen Ausführungsform kann das Getriebe als Zahnriementrieb ausgeführt sein, welcher ebenfalls vergleichsweise zuverlässig und wartungsarm ist.According to an alternative embodiment, the transmission can be designed as a toothed belt drive, which is also comparatively reliable and requires little maintenance.
Vorteilhafterweise weist der Zahnriementrieb ein Übersetzungsverhältnis von 1 : 1 bis 1 : 6, vorzugsweise 1 : 3,5 auf. Für einen Schaltvorgang, der beispielsweise eine Drehung der Drehwelle um 70° erfordert, wird sich die Antriebswelle des Elektromotors um 70° bis 420°, vorzugsweise 245° drehen. Ein kleiner Drehwinkel der Antriebswelle verlangt ein hohes Drehmoment des Elektromotors, und ein großer Drehwinkel verlangt eine hohe Winkelgeschwindigkeit. Ein praktisch anzustrebender Mittelwert liegt bei einem Drehwinkel von etwa 245°, also einer Getriebeübersetzung von 1 : 3,5.The toothed belt drive advantageously has a transmission ratio of 1: 1 to 1: 6, preferably 1: 3.5. For a switching operation that requires, for example, a rotation of the rotary shaft by 70 °, the drive shaft of the electric motor will rotate by 70 ° to 420 °, preferably 245 °. A small angle of rotation of the drive shaft requires a high torque of the electric motor, and a large angle of rotation requires a high angular velocity. A practically desirable average is a rotation angle of approximately 245 °, i.e. a gear ratio of 1: 3.5.
Des weiteren wird ein Schaltgerät, insbesondere ein Hochspannungsleistungsschalter, mit einer erfindungsgemäßen Betätigungsvorrichtung beansprucht. Die Betätigungsvorrichtung ist auch auf weitere Hoch-, Mittel- und Niederspannungsschaltgeräte, beispielsweise Leistungsschalter, Trenner, Erder sowie Lasttrenner anwendbar.Furthermore, a switching device, in particular a high-voltage circuit breaker, is claimed with an actuating device according to the invention. The actuating device can also be applied to other high, medium and low voltage switching devices, for example circuit breakers, disconnectors, earth electrodes and load disconnectors.
Anhand der Zeichnungen, in denen drei Ausführungsbeispiele der Erfindung dargestellt sind, werden die Erfindung, vorteilhafte Ausgestaltungen und Verbesserungen der Erfindung, sowie weitere Vorteile näher erläutert und beschrieben.The invention, advantageous refinements and improvements of the invention, and further advantages are explained and described in more detail with reference to the drawings, in which three exemplary embodiments of the invention are shown.
Es zeigen:Show it:
Fig. 1 eine erfindungsgemäße Betätigungsvorrichtung mit einem Hebelgetriebe bei ausgeschaltetem Schaltgerät, Fig. 2 eine erfindungsgemäße Betätigungsvorrichtung mit einem Hebelgetriebe bei eingeschaltetem Schaltgerät, Fig. 3 eine Kreisscheibe mit mehreren Befestigungsmöglichkeiten und Fig. 4 eine erfindungsgemäße Betätigungsvorrichtung mit einem Zahnriementrieb1 shows an actuating device according to the invention with a lever mechanism when the switching device is switched off, FIG. 2 shows an actuating device according to the invention with a lever mechanism when the switching device is switched on, FIG. 3 shows a circular disk with a plurality of fastening options and FIG
In Fig. 1 ist eine erfindungsgemäße Betätigungsvorrichtung mit einem Hebelgetriebe bei ausgeschaltetem Schaltgerät gezeigt. An einer Antriebswelle 18 eines Elektromotors ist ein erster Hebel 16 quer zur Antriebswelle 18 befestigt, welcher über eine Pleuelstange 14 auf einen zweiten Hebel 12 wirkt, welcher an einer Drehwelle 10 eines Schaltgerätes quer zur Drehwelle 10 befestigt ist. An der Drehwelle 10 ist gasraumseitig auch ein Betätigungshebel 42 quer zur Drehwelle 10 befestigt, der über eine Isolierstange 44 ein bewegliches Kontaktstück einer Schaltkammer 40 betätigt. Die Schaltkammer 40 ist nur symbolisch dargestellt.In Fig. 1, an actuating device according to the invention is shown with a lever gear when the switching device is switched off. On a drive shaft 18 of an electric motor, a first lever 16 is fastened transversely to the drive shaft 18, which is connected via a connecting rod 14 acts on a second lever 12 which is attached to a rotary shaft 10 of a switching device transversely to the rotary shaft 10. On the gas shaft side, an actuating lever 42 is also fastened transversely to the rotary shaft 10 on the gas space side and actuates a movable contact piece of a switching chamber 40 via an insulating rod 44. The switching chamber 40 is only shown symbolically.
Eine gedachte Verbindungslinie V verläuft durch die Mittelachse der Antriebswelle 18 und die Mittelachse der Drehwelle 10. Eine gedachte Mittellinie M schneidet die Verbindungslinie V und die Mittelachse der Drehwelle 10 rechtwinklig.An imaginary connecting line V runs through the central axis of the drive shaft 18 and the central axis of the rotary shaft 10. An imaginary center line M intersects the connecting line V and the central axis of the rotary shaft 10 at right angles.
In der hier gezeigten Darstellung, in der, wie am Symbol der Schaltkammer 40 erkennbar, das Schaltgerät ausgeschaltet ist, ist der zweite Hebel 12 um einen spitzen Winkel α gegen die Mittellinie M geneigt. Dabei befindet sich das mit der Pleuelstange 14 verbundene Ende des zweiten Hebels 12 auf der von der Antriebswelle 18 abgewandten Seite der Mittellinie M. Der erste Hebel 16 fluchtet mit der Verbindungslinie V, wobei sein mit der Pleuelstange 14 verbundenes Ende in Richtung der Drehwelle 10 weist.In the illustration shown here, in which, as can be seen from the symbol of the switching chamber 40, the switching device is switched off, the second lever 12 is inclined at an acute angle α relative to the center line M. The end of the second lever 12 connected to the connecting rod 14 is located on the side of the center line M facing away from the drive shaft 18. The first lever 16 is aligned with the connecting line V, with its end connected to the connecting rod 14 pointing in the direction of the rotary shaft 10 ,
Zum Einschalten des Schaltgerätes wird der erste Hebel 16 von der Antriebswelle 18 um einen Winkel ß, in diesem Fall 180°, gedreht. Während dieser Drehung befinden sich der erste Hebel 16, die Pleuelstange 14 und der zweite Hebel 12 stets auf der gleichen Seite der Verbindungslinie V.To switch on the switching device, the first lever 16 is rotated by the drive shaft 18 through an angle β, in this case 180 °. During this rotation, the first lever 16, the connecting rod 14 and the second lever 12 are always on the same side of the connecting line V.
In Fig. 2 ist die Betätigungsvorrichtung aus Fig. 1 bei eingeschaltetem Schaltgerät gezeigt, wie am Symbol der Schaltkammer 40 zu erkennen ist. Der erste Hebel 16 fluchtet wieder mit der Verbindungslinie V, wobei jedoch sein mit der Pleuelstange 14 verbundenes Ende von der Drehwelle 10 weg weist. Der zweite Hebel 12 ist wieder um den Winkel α gegen die Mittellinie M geneigt, wobei sich jedoch sein mit der Pleuelstange 14 verbundenes Ende auf der der Antriebswelle 18 zugewandten Seite der Mittellinie M befindet.2 shows the actuating device from FIG. 1 with the switching device switched on, as can be seen from the symbol of the switching chamber 40. The first lever 16 is again aligned with the connecting line V, but its end connected to the connecting rod 14 points away from the rotary shaft 10. The second lever 12 is again inclined by the angle α relative to the center line M, but its end connected to the connecting rod 14 is located on the side of the center line M facing the drive shaft 18.
Zum Ausschalten des Schaltgerätes wird der erste Hebel 16 von der Antriebswelle 18 um den Winkel ß, in diesem Fall 180°, in die entgegengesetzte Richtung wie beim Einschalten gedreht. Eine Drehung des ersten Hebels 16 um 180° bewirkt somit eine Drehung des zweiten Hebels um 2 * α. Für die Bemessung des Hebelgetriebes ergibt sich: L1 = L2 * sin(α), wobei L1 die Länge des ersten Hebels 16 und L2 die Länge des zweiten Hebels 12 darstellt. Die Länge der Pleuelstange 14 ist größer als die Länge des zweiten Hebels 12 zu wählen.To switch off the switching device, the first lever 16 is rotated by the drive shaft 18 through the angle β, in this case 180 °, in the opposite direction as when switching on. A rotation of the first lever 16 by 180 ° thus causes a rotation of the second lever by 2 * α. For the dimensioning of the lever gear, the following results: L1 = L2 * sin (α), where L1 represents the length of the first lever 16 and L2 the length of the second lever 12. The length of the connecting rod 14 is to be selected to be greater than the length of the second lever 12.
In Fig. 3 ist ein Zwischenstück in Form einer Kreisscheibe 26 mit mehreren Befestigungsmöglichkeiten für eine Pleuelstange 14 gezeigt. Die Kreisscheibe 26 ist auf die Antriebswelle 18 des Elektromotors montiert, wobei die Mittelachsen der Kreisscheibe 26 und der Antriebswelle 18 miteinander fluchten. Die Kreisscheibe 26 weist hier vier Bohrungen 31, 32, 33 und 34 auf, welche jeweils in einem unterschiedlichen radialen Abstand von der Mittelachse der Kreisscheibe 26 angebracht sind und als Befestigungsmöglichkeit für die Pleuelstange 14 dienen. Die Pleuelstange 14 weist beispielsweise ebenfalls eine Bohrung auf, so dass die Kreisscheibe 26 und die Pleuelstange 14 mit Hilfe eines Bolzens verbindbar sind.In Fig. 3, an intermediate piece in the form of a circular disc 26 with several attachment options for a connecting rod 14 is shown. The circular disk 26 is mounted on the drive shaft 18 of the electric motor, the central axes of the circular disk 26 and the drive shaft 18 being aligned with one another. The circular disk 26 here has four bores 31, 32, 33 and 34, which are each provided at a different radial distance from the central axis of the circular disk 26 and serve as a fastening option for the connecting rod 14. The connecting rod 14 also has a bore, for example, so that the circular disk 26 and the connecting rod 14 can be connected with the aid of a bolt.
Der radiale Abstand der Bohrung 31, 32, 33 oder 34, mit welcher die Pleuelstange 14 verbunden ist, von der Mittelachse der Antriebswelle 18 entspricht der Länge L1 des ersten Hebels 16 in Fig. 1 und Fig. 2. Durch Wahl der entsprechenden Bohrung 31, 32, 33 oder 34 zur Verbindung mit der Pleuelstange 14 ist somit eine Anpassung des Hebelgetriebes auf unterschiedliche Längen L2 des zweiten Hebels 12 und/oder verschiedene Drehwinkel α der Drehwelle 10 möglich. Die Kreisscheibe ist dabei so auszurichten, dass die Bohrung 31, 32, 33 oder 34, mit welcher die Pleuelstange 14 verbunden ist, bei ausgeschaltetem Schaltgerät auf der Verbindungslinie V liegt und zur Drehwelle 10 hin weist.The radial distance of the bore 31, 32, 33 or 34, with which the connecting rod 14 is connected, from the central axis of the drive shaft 18 corresponds to the length L1 of the first lever 16 in FIGS. 1 and 2. By selecting the corresponding bore 31 , 32, 33 or 34 for connection to the connecting rod 14, an adjustment of the lever gear to different lengths L2 of the second lever 12 and / or different angles of rotation α of the rotary shaft 10 is thus possible. The circular disk is to be aligned such that the bore 31, 32, 33 or 34, with which the connecting rod 14 is connected, lies on the connecting line V when the switching device is switched off and points towards the rotary shaft 10.
Die Anordnung der Bohrungen auf der Kreisscheibe ist frei wählbar, wie beispielsweise durch die Anordnung einer ersten Bohrung 31 und einer zweiten Bohrung 32 dargestellt. Eine dritte Bohrung 33 und eine vierte Bohrung 34 sind beispielsweise so angeordnet, dass ihre Mittelpunkte mit der Mittelachse der Antriebswelle 18 fluchten.The arrangement of the bores on the circular disk can be freely selected, as illustrated, for example, by the arrangement of a first bore 31 and a second bore 32. A third bore 33 and a fourth bore 34 are arranged, for example, such that their centers are aligned with the center axis of the drive shaft 18.
Die Ausführung des Zwischenstücks ist nicht auf die hier beschriebene Form als Kreisscheibe beschränkt, vielmehr kann das Zwischenstück beispielsweise als Kreissegment, als Oval, als Stange, als Dreieck, als Rechteck oder in einer anderen Form ausgeführt sein.The design of the intermediate piece is not limited to the shape described here as a circular disk, rather the intermediate piece can be, for example, as Circle segment, as an oval, as a rod, as a triangle, as a rectangle or in another form.
In Fig. 4 ist eine erfindungsgemäße Betätigungsvorrichtung mit einem Zahnriementrieb gezeigt. Eine erste Riemenscheibe 24 ist auf der Antriebswelle 18 des Elektromotors montiert und eine zweite Riemenscheibe 22 auf der Drehwelle 10 des Schaltgerätes. Um die Riemenscheiben 22 und 24 herum ist ein Zahnriemen 20 gespannt. An der Drehwelle 10 ist auch ein Betätigungshebel 42 quer zur Drehwelle 10 befestigt, der über eine Isolierstange 44 ein bewegliches Kontaktstück einer Schaltkammer 40 betätigt. Die Schaltkammer 40 ist nur symbolisch dargestellt.4 shows an actuating device according to the invention with a toothed belt drive. A first pulley 24 is mounted on the drive shaft 18 of the electric motor and a second pulley 22 on the rotary shaft 10 of the switching device. A toothed belt 20 is tensioned around the pulleys 22 and 24. An actuating lever 42 is also fastened to the rotary shaft 10 transversely to the rotary shaft 10 and actuates a movable contact piece of a switching chamber 40 via an insulating rod 44. The switching chamber 40 is only shown symbolically.
Das Übersetzungsverhältnis des Zahnriementriebs ergibt sich als Quotient aus dem Radius der ersten Riemenscheibe 24 und dem Radius der zweiten Riemenscheibe 22. Wenn das Übersetzungsverhältnis 1 : 3 beträgt, dann erfolgt ein Schaltvorgang, bei dem die Drehwelle 10 um beispielsweise 70° zu drehen ist, durch eine Drehung der Antriebswelle 18 um 210°. The gear ratio of the toothed belt drive results as the quotient of the radius of the first pulley 24 and the radius of the second pulley 22. If the gear ratio is 1: 3, then a switching operation takes place in which the rotary shaft 10 is to be rotated, for example, by 70 ° a rotation of the drive shaft 18 by 210 °.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
10 Drehwelle10 rotary shaft
12 zweiter Hebel12 second lever
14 Pleuelstange14 connecting rod
16 erster Hebel16 first lever
18 Antriebswelle18 drive shaft
20 Zahnriemen20 timing belts
22 zweite Riemenscheibe22 second pulley
24 erste Riemenscheibe24 first pulley
26 Kreisscheibe26 circular disc
31 erste Bohrung31 first hole
32 zweite Bohrung32 second hole
33 dritte Bohrung33 third hole
34 vierte Bohrung34 fourth hole
40 Schaltkammer40 interrupter
42 Betätigungshebel42 operating lever
44 Isolierstange α : Drehwinkel der Drehwelle ß: Drehwinkel der Antriebswelle44 Isolating rod α: angle of rotation of the rotating shaft ß: angle of rotation of the drive shaft
M : MittellinieM: center line
V : Verbindungslinie V: connecting line

Claims

Patentansprüche claims
1. Vorrichtung zur Betätigung eines elektrischen Schaltgerätes mit mindestens einem beweglichen Kontaktstück, wobei das mindestens eine beweglich Kontaktstück über eine Drehwelle (10) angetrieben wird, dadurch gekennzeichnet, dass zum Antrieb der Drehwelle (10) ein Elektromotor mit einer rotierenden Antriebswelle (18), die mittels eines Getriebes mit der Drehwelle (10) für das Schaltgerät koppelbar ist, vorgesehen ist.1. Device for actuating an electrical switching device with at least one movable contact piece, the at least one movable contact piece being driven via a rotary shaft (10), characterized in that an electric motor with a rotating drive shaft (18) is used to drive the rotary shaft (10). which can be coupled by means of a gearbox to the rotary shaft (10) for the switching device.
2. Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass bei mehrpoligen, insbesondere dreipoligen, Schaltgeräten ein Elektromotor zum Antrieb aller Schalterpole vorgesehen ist.2. Device according to claim 1, characterized in that in multi-pole, in particular three-pole, switching devices, an electric motor is provided for driving all switch poles.
3. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass bei mehrpoligen, insbesondere dreipoligen, Schaltgeräten zum Antrieb jedes Schalterpols ein separater Elektromotor vorgesehen ist.3. Device according to claim 1, characterized in that in the case of multi-pole, in particular three-pole, switching devices for driving each switch pole, a separate electric motor is provided.
4. Vorrichtung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Mittelachse der Antriebswelle (18) parallel zu der Mittelachse der Drehwelle (10) verläuft.4. Device according to one of the preceding claims, characterized in that the central axis of the drive shaft (18) runs parallel to the central axis of the rotary shaft (10).
5. Vorrichtung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass der Elektromotor als Servomotor ausgeführt ist.5. Device according to one of the preceding claims, characterized in that the electric motor is designed as a servo motor.
6. Vorrichtung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass das Getriebe als Hebelgetriebe ausgeführt ist. 6. Device according to one of the preceding claims, characterized in that the transmission is designed as a lever transmission.
7. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, dass das Hebelgetriebe so bemessen ist, dass eine Drehung der Antriebswelle (18) des Elektromotors um höchstens 180° einen Schaltvorgang des Schaltgerätes bewirkt.7. The device according to claim 6, characterized in that the lever gear is dimensioned such that a rotation of the drive shaft (18) of the electric motor by a maximum of 180 ° causes a switching operation of the switching device.
8. Vorrichtung nach einem der Ansprüche 6 oder 7, dadurch gekennzeichnet, dass an der Antriebswelle (18) des Elektromotors ein Zwischenstück, vorzugsweise eine Kreisscheibe (26), befestigt ist, an dem das der Antriebswelle (18) zugewandte Ende der Pleuelstange (14) in wenigstens zwei Abständen zur Mittelachse der Antriebswelle (18) anschließbar ist.8. Device according to one of claims 6 or 7, characterized in that an intermediate piece, preferably a circular disc (26), is attached to the drive shaft (18) of the electric motor, on which the end of the connecting rod (14) facing the drive shaft (18) ) can be connected at least two distances from the central axis of the drive shaft (18).
9. Vorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass das Getriebe als Zahnriementrieb ausgeführt ist.9. Device according to one of claims 1 to 5, characterized in that the transmission is designed as a toothed belt drive.
10. Vorrichtung nach Anspruch 9, dadurch gekennzeichnet, dass der Zahnriementrieb ein Übersetzungsverhältnis von 1 : 1 bis 1 : 6, vorzugsweise 1 : 3,5 aufweist.10. The device according to claim 9, characterized in that the toothed belt drive has a transmission ratio of 1: 1 to 1: 6, preferably 1: 3.5.
11. Schaltgerät mit mindestens einer Vorrichtung zur Betätigung nach einem der vorstehenden Ansprüche. 11. Switching device with at least one device for actuation according to one of the preceding claims.
EP03750542A 2003-09-13 2003-09-13 Device for actuating an electrical switchgear Revoked EP1665304B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2003/010199 WO2005034156A1 (en) 2003-09-13 2003-09-13 Device for actuating an electrical switchgear

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EP1665304A1 true EP1665304A1 (en) 2006-06-07
EP1665304B1 EP1665304B1 (en) 2007-06-27

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US (1) US8035329B2 (en)
EP (1) EP1665304B1 (en)
JP (1) JP2007515744A (en)
CN (1) CN100458995C (en)
AT (1) ATE365970T1 (en)
AU (1) AU2003270192A1 (en)
DE (1) DE50307589D1 (en)
WO (1) WO2005034156A1 (en)

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WO2005034156A1 (en) 2005-04-14
AU2003270192A1 (en) 2005-04-21
US8035329B2 (en) 2011-10-11
EP1665304B1 (en) 2007-06-27
CN100458995C (en) 2009-02-04
JP2007515744A (en) 2007-06-14
US20060220470A1 (en) 2006-10-05
CN1839455A (en) 2006-09-27
ATE365970T1 (en) 2007-07-15
DE50307589D1 (en) 2007-08-09

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