EP1665304B1 - Device for actuating an electrical switchgear - Google Patents
Device for actuating an electrical switchgear Download PDFInfo
- Publication number
- EP1665304B1 EP1665304B1 EP03750542A EP03750542A EP1665304B1 EP 1665304 B1 EP1665304 B1 EP 1665304B1 EP 03750542 A EP03750542 A EP 03750542A EP 03750542 A EP03750542 A EP 03750542A EP 1665304 B1 EP1665304 B1 EP 1665304B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- electric motor
- drive shaft
- switching
- lever
- pole
- 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.)
- Revoked
Links
- 230000005540 biological transmission Effects 0.000 claims abstract description 8
- 230000005405 multipole Effects 0.000 claims description 4
- 238000012423 maintenance Methods 0.000 description 5
- 238000004146 energy storage Methods 0.000 description 4
- 230000004913 activation Effects 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
Images
Classifications
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- 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
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- 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
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- 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.
- Conventional power switches 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, whose other end is connected to one end of an actuating lever.
- the other end of the operating lever is fixed to a rotary shaft, so that is moved by a rotation of the rotary shaft, the movable contact piece to the fixed contact piece, or away from it.
- the length of the actuating lever is dimensioned such that the power switch is switched on or off by a rotation of the rotary shaft by a certain angle.
- the rotary shaft is often rotated by means of a mechanical or hydromechanical spring-loaded drive; the drive is coupled to one end of a connecting rod, which is connected via a further lever to the rotary shaft of the circuit breaker.
- a linear or approximately linear movement of the drive by a certain stroke causes a rotation of the rotary shaft by the predetermined angle and thus a switching operation.
- a mechanical or hydromechanical spring storage drive of this type has an energy storage, which, for example, as a mechanical spring storage in the form of coil springs, coil springs, torsion springs or disc springs is executed.
- This spring accumulator is tensioned by means of an elevator motor.
- the spring accumulator is released by releasing a latch, or by actuation of a control valve, whereby the spring energy via a transmission, or via a hydraulic transmission medium, is transmitted to the connecting rod and thus exerts the required stroke on the connecting rod.
- Such spring drives have a relatively complex structure of many individual moving parts and have a relatively large amount of space. Furthermore, such mechanically moving and frictional parts generally require regular maintenance and checks,
- Corresponding switching devices in which the switching off via an energy storage spring, are in the GB 808 125 A1 described. There is provided for switching off an energy storage spring 24, with which the switch is actuated in the event of a switch-off.
- the invention has for its object to provide a device for actuating a switching device, which has a simple structure with less space 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 via a transmission with the rotary shaft of the switching device is provided.
- An energy storage for an activation or in particular for a shutdown is not provided. Rather, the elimination is effected exclusively by means of the electric motor.
- an electric motor Compared to a mechanical or hydromechanical spring-loaded drive, an electric motor has a comparatively simple construction and has a smaller footprint. Also, the cost of its maintenance compared to a spring drive is reduced.
- the use of a gear causes the torque that is transmitted to the rotary shaft of the switching device is greater than the torque that has to apply the electric motor.
- a motor is provided to drive all switch poles.
- a separate electric motor for driving each switch pole is providable.
- the central axis of the drive shaft of the electric motor is 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 servomotor.
- a servomotor offers over other electric motors the advantage that a correspondingly accurate rotation of a predetermined angle is executable. Furthermore, a servomotor, especially in short-term operation, provides a comparatively high torque.
- the transmission is designed as a lever mechanism.
- a lever mechanism which is also referred to as a four-element rotary joint or as a rocker arm, is reliable and requires little maintenance.
- the lever mechanism can be dimensioned so that a rotation of the drive shaft of the electric motor causes a switching operation by 180 °.
- a rotation of the drive shaft of the electric motor by less than 180 °, for example 90 °, 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, attached to the drive shaft of the electric motor, wherein the drive shaft facing the end of the connecting rod can be connected in at least two distances from the central axis of the drive shaft to the intermediate piece.
- the transmission may be designed as a toothed belt drive, which is also relatively reliable and low maintenance.
- the toothed belt drive 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 rotation angle of the drive shaft requires a high torque of the electric motor, and a large rotation angle requires a high angular velocity.
- a practically desirable mean value is a rotation angle of about 245 °, ie a gear ratio of 1: 3.5.
- a switching device in particular a high-voltage circuit breaker, claimed with an actuator according to the invention.
- the actuator is also applicable to other high, medium and low voltage switching devices, such as circuit breakers, disconnectors, earthing and load disconnectors.
- an actuating device is shown with a lever mechanism with switched-off switching device.
- a first lever 16 is fixed transversely to the drive shaft 18, which via a connecting rod 14 acts on a second lever 12 which is fixed to a rotary shaft 10 of a switching device transversely to the rotary shaft 10.
- an actuating lever 42 is also mounted transversely to the rotary shaft 10 on the gas chamber side, which actuates a movable contact piece of a switching chamber 40 via an insulating rod 44.
- the switching chamber 40 is shown only symbolically.
- An imaginary line V passes through the center axis of the drive shaft 18 and the center axis of the rotary shaft 10.
- An imaginary center line M intersects the connecting line V and the center axis of the rotary shaft 10 at right angles.
- the second lever 12 is inclined at an acute angle ⁇ against 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, its end connected to the connecting rod 14 pointing in the direction of the rotary shaft 10 ,
- the first lever 16 of the drive shaft 18 by an angle ⁇ , in this case 180 ° rotated. 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 the actuating device of Fig. 1 is shown with the switching device, as can be seen on the symbol of the switching chamber 40.
- the first lever 16 is aligned again with the connecting line V, but its end connected to the connecting rod 14 facing away from the rotary shaft 10.
- the second lever 12 is again inclined at an angle ⁇ 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 by the angle ⁇ , in this case 180 °, in the opposite direction as when switching.
- a rotation of the first lever 16 by 180 ° thus causes a rotation of the second lever by 2 * ⁇ .
- L1 L2 * sin ( ⁇ ), where L1 is the length of the first lever 16 and L2, the length of the second lever 12.
- the length of the connecting rod 14 is greater than the length of the second lever 12 to choose.
- FIG. 3 an intermediate piece in the form of a circular disc 26 with a plurality of mounting options for a connecting rod 14 is shown.
- the circular disc 26 is mounted on the drive shaft 18 of the electric motor, wherein the central axes of the circular disc 26 and the drive shaft 18 are aligned.
- the circular disk 26 here has four holes 31, 32, 33 and 34, which are each mounted at a different radial distance from the central axis of the circular disk 26 and serve as a mounting option for the connecting rod 14.
- the connecting rod 14, for example, also has a bore, so that the circular disk 26 and the connecting rod 14 can be connected by means 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 Fig. 1 and Fig. 2.
- the corresponding bore 31st , 32, 33 or 34 for connection to the connecting rod 14 is thus an adaptation of the lever mechanism to different lengths L2 of the second lever 12 and / or different rotational angle ⁇ of the rotary shaft 10 possible.
- the circular disc is to be aligned so that the bore 31, 32, 33 or 34, with which the connecting rod 14 is connected, is switched off switching device on the connecting line V and the rotary shaft 10 points.
- the arrangement of the holes on the circular disc is arbitrary, as shown 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, so that their centers are aligned with the central axis of the drive shaft 18.
- the embodiment of the intermediate piece is not limited to the shape described here as a circular disk, but rather the intermediate piece can be used as a Circular segment, as an oval, as a rod, as a triangle, as a rectangle or in any other 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.
- Around the pulleys 22 and 24 around a toothed belt 20 is tensioned.
- On the rotary shaft 10 and an actuating lever 42 is fixed transversely to the rotary shaft 10, which actuates a movable contact piece of a switching chamber 40 via an insulating rod 44.
- the switching chamber 40 is shown only symbolically.
- the gear ratio of the toothed belt drive is obtained as a 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 in which the rotary shaft 10 is to be rotated by 70 °, for example a rotation of the drive shaft 18 by 210 °.
Landscapes
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- Mechanisms For Operating Contacts (AREA)
- Lock And Its Accessories (AREA)
- Power-Operated Mechanisms For Wings (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Push-Button Switches (AREA)
- Switch Cases, Indication, And Locking (AREA)
- Keying Circuit Devices (AREA)
Abstract
Description
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 Hochspannungsleistungsschalter, 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 power switches 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, whose other end is connected to one end of an actuating lever. The other end of the operating lever is fixed to a rotary shaft, so that is moved by a rotation of the rotary shaft, the movable contact piece to the fixed contact piece, or away from it. The length of the actuating lever is dimensioned such that the power switch is switched on or off by a rotation of 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 rotated by means of a mechanical or hydromechanical spring-loaded drive; the drive is coupled to one end of a connecting rod, which is connected via a further lever to the rotary shaft of the circuit breaker. A linear or approximately linear movement of the drive by a certain stroke causes a rotation of the rotary shaft 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 storage drive of this type has an energy storage, which, for example, as a mechanical spring storage in the form of coil springs, coil springs, torsion springs or disc springs is executed. This spring accumulator is tensioned by means 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 released by releasing a latch, or by actuation of a control valve, whereby the spring energy via a transmission, or via a hydraulic transmission medium, is transmitted to the connecting rod 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 drives have a relatively complex structure of many individual moving parts and have a relatively large amount of space. Furthermore, such mechanically moving and frictional parts generally require regular maintenance and checks,
Entsprechende Schaltgeräte, bei denen die Ausschaltung über eine Energiespeicherfeder erfolgt, sind in der
Aus der weiterhin entgegengehaltenen
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 less space 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 actuator with the features specified in claim 1. Further advantageous embodiments, 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 ausschließlich ein Elektromotor mit einer rotierenden Antriebswelle, die über ein Getriebe mit der Drehwelle des Schaltgerätes koppelbar ist, vorgesehen. Ein Energiespeicher für eine Einschaltung oder insbesondere für eine Ausschaltung ist nicht vorgesehen. Vielmehr wird auch die Ausschaltung ausschließlich mittels des Elektromotors bewirkt.According to the invention for driving a rotary shaft of an electrical switching device, in particular a high-voltage circuit breaker exclusively an electric motor with a rotating drive shaft which can be coupled via a transmission with the rotary shaft of the switching device is provided. An energy storage for an activation or in particular for a shutdown is not provided. Rather, the elimination is effected exclusively by means of the electric motor.
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.Compared to a mechanical or hydromechanical spring-loaded drive, an electric motor has a comparatively simple construction and has a smaller footprint. Also, the cost of its maintenance compared to a spring drive is reduced. The use of a gear causes the torque that is transmitted to the rotary shaft of the switching device is greater than the torque that has to apply the electric motor. Thus, the design, and thus the space required, compared to an electric motor that drives the rotary shaft directly, further reduce. In multi-pole, especially three-pole, switching devices, a motor is provided to drive all switch poles.
Alternativ ist bei mehrpoligen, insbesondere dreipoligen, Schaltgeräten auch ein separater Elektromotor zum Antrieb jedes Schalterpols vorsehbar.Alternatively, in multi-pole, in particular three-pole, switching devices, a separate electric motor for driving each switch pole is providable.
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 is 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 servomotor. A servomotor offers over other electric motors the advantage that a correspondingly accurate rotation of a predetermined angle is executable. Furthermore, a servomotor, especially in short-term operation, provides a comparatively high torque.
Gemäß einer vorteilhaften Ausführungsform ist das Getriebe als Hebelgetriebe ausgeführt. 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 mechanism. Such a lever mechanism, which is also referred to as a four-element rotary joint or as a rocker 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.Advantageously, the lever mechanism can be dimensioned so that a rotation of the drive shaft of the electric motor causes a switching operation by 180 °. There is also the possibility of the lever mechanism dimensioned so that a 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, attached to the drive shaft of the electric motor, wherein the drive shaft facing the end of the connecting rod can be connected in at least two distances from the central axis of the drive shaft to the intermediate piece. In this manner By adjusting the connecting rod at a suitable distance from the central axis of the drive shaft, the lever mechanism can be adjusted to different output angles.
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 may be designed as a toothed belt drive, which is also relatively reliable and low 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.Advantageously, the toothed belt drive has a transmission ratio of 1: 1 to 1: 6, preferably 1: 3.5. For a switching operation, for example, requires 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 rotation angle of the drive shaft requires a high torque of the electric motor, and a large rotation angle requires a high angular velocity. A practically desirable mean value is a rotation angle of about 245 °, ie 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, claimed with an actuator according to the invention. The actuator is also applicable to other high, medium and low voltage switching devices, such as circuit breakers, disconnectors, earthing 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.Reference to the drawings, in which three embodiments of the invention are shown, the invention, advantageous embodiments and improvements of the invention, and further advantages are explained and described in detail.
Es zeigen:
- 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 Zahnriementrieb
- Fig. 1
- an actuating device according to the invention with a lever mechanism when the switching device is switched off,
- Fig. 2
- an actuating device according to the invention with a lever mechanism when the switching device is switched on,
- Fig. 3
- a circular disk with several mounting options and
- Fig. 4
- an actuating device according to the invention with a toothed belt drive
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 mechanism with switched-off switching device. To a
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 line V passes through the center axis of the
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 indicated by the symbol of the switching
Zum Einschalten des Schaltgerätes wird der erste Hebel 16 von der Antriebswelle 18 um einen Winkel β, 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
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.In Fig. 2, the actuating device of Fig. 1 is shown with the switching device, as can be seen on the symbol of the switching
Zum Ausschalten des Schaltgerätes wird der erste Hebel 16 von der Antriebswelle 18 um den Winkel β, in diesem Fall 180°, in die entgegengesetzte Richtung wie beim Einschalten gedreht.To turn off the switching device, the
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.A rotation of the
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
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
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 holes on the circular disc is arbitrary, as shown for example by the arrangement of a
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 embodiment of the intermediate piece is not limited to the shape described here as a circular disk, but rather the intermediate piece can be used as a Circular segment, as an oval, as a rod, as a triangle, as a rectangle or in any other 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.FIG. 4 shows an actuating device according to the invention with a toothed belt drive. A
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 is obtained as a quotient of the radius of the
- 10:10:
- Drehwellerotary shaft
- 12 :12:
- zweiter Hebelsecond lever
- 14:14:
- Pleuelstangeconnecting rod
- 16:16:
- erster Hebelfirst lever
- 18:18:
- Antriebswelledrive shaft
- 20:20:
- Zahnriementoothed belt
- 22:22:
- zweite Riemenscheibesecond pulley
- 24:24:
- erste Riemenscheibefirst pulley
- 26:26:
- Kreisscheibedisc
- 31:31:
- erste Bohrungfirst hole
- 32:32:
- zweite Bohrungsecond hole
- 33 :33:
- dritte Bohrungthird hole
- 34:34:
- vierte Bohrungfourth hole
- 40:40:
- Schaltkammerswitching chamber
- 42:42:
- Betätigungshebelactuating lever
- 44:44:
- Isolierstangeinsulating
- α :α:
- Drehwinkel der DrehwelleAngle of rotation of the rotary shaft
- β:β:
- Drehwinkel der AntriebswelleAngle of rotation of the drive shaft
- M:M:
- Mittelliniecenter line
- V:V:
- Verbindungslinieconnecting line
Claims (11)
- Apparatus for actuating an electrical switch pole or a switching device having at least one moving contact piece, the at least one moving contact piece being driven via a rotating shaft (10),
characterized in that
only one electric motor having a rotating drive shaft (18), which is coupled to the rotating shaft (10) for the switching device by means of a gear mechanism, is provided for the purpose of driving the rotating shaft (10) for the switching-on and switching-off processes. - Apparatus according to Claim 1, characterized in that, in the case of multi-pole, in particular three-pole, switching devices, an electric motor is provided for the purpose of driving all of the switch poles.
- Apparatus according to Claim 1, characterized in that, in the case of multi-pole, in particular three-pole, switching devices, a separate electric motor is provided for the purpose of driving each switch pole.
- Apparatus 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 rotating shaft (10). - Apparatus according to one of the preceding claims, characterized
in that the electric motor is in the form of a servomotor. - Apparatus according to one of the preceding claims, characterized
in that the gear mechanism is in the form of a lever mechanism. - Apparatus according to Claim 6, characterized in that the lever mechanism is dimensioned such that a rotation of the drive shaft (18) of the electric motor through at most 180° brings about a switching operation of the switching device.
- Apparatus according to either of Claims 6 and 7, characterized
in that an intermediate piece, preferably a circular disc (26), is fixed to the drive shaft (18) of the electric motor, and that end of the connecting rod (14) which faces the drive shaft (18) can be connected to said intermediate piece at at least two distances from the central axis of the drive shaft (18). - Apparatus according to one of Claims 1 to 5, characterized
in that the gear mechanism is in the form of a toothed belt drive. - Apparatus 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.
- Switching device having at least one apparatus for actuating purposes according to one of the preceding claims.
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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1665304A1 EP1665304A1 (en) | 2006-06-07 |
| EP1665304B1 true EP1665304B1 (en) | 2007-06-27 |
Family
ID=34400426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP03750542A Revoked EP1665304B1 (en) | 2003-09-13 | 2003-09-13 | Device for actuating an electrical switchgear |
Country Status (8)
| Country | Link |
|---|---|
| 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) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2461108C1 (en) * | 2011-07-14 | 2012-09-10 | Общество с ограниченной ответственностью "Техкам-Сервис" | Electromechanical switch |
| RU173314U1 (en) * | 2017-05-12 | 2017-08-22 | Алексей Алексеевич Еремин | ELECTROMECHANICAL SWITCHING DEVICE FOR ENSURING UNINTERRUPTED POWER SUPPLY OF CONSUMERS |
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| DE102006001241A1 (en) * | 2006-01-06 | 2007-07-12 | Siemens Ag | Switching point of an electrical switching device and method for moving a switching piece of a switching point |
| DE102010049137A1 (en) * | 2010-10-22 | 2012-04-26 | Abb Technology Ag | Spring-loaded drive and high-voltage circuit-breaker |
| DE102013005746A1 (en) | 2013-04-05 | 2014-10-09 | Abb Technology Ag | Drive device for a circuit breaker of a medium or high voltage switchgear |
| US9646778B2 (en) | 2014-01-21 | 2017-05-09 | Mitsubishi Electric Corporation | Gas insulated switching apparatus and switch |
| DE102015200135A1 (en) * | 2015-01-08 | 2016-07-14 | Siemens Aktiengesellschaft | Coupling member for an electrical switching device, in particular a vacuum interrupter |
| DE102016214544B4 (en) * | 2016-08-05 | 2020-01-09 | Siemens Aktiengesellschaft | Transmission between a movable switch contact and a drive of a circuit breaker and a circuit breaker with such a transmission |
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-
2003
- 2003-09-13 CN CNB038270668A patent/CN100458995C/en not_active Expired - Fee Related
- 2003-09-13 DE DE50307589T patent/DE50307589D1/en not_active Expired - Lifetime
- 2003-09-13 AU AU2003270192A patent/AU2003270192A1/en not_active Abandoned
- 2003-09-13 JP JP2005509268A patent/JP2007515744A/en active Pending
- 2003-09-13 WO PCT/EP2003/010199 patent/WO2005034156A1/en not_active Ceased
- 2003-09-13 US US10/568,751 patent/US8035329B2/en not_active Expired - Lifetime
- 2003-09-13 EP EP03750542A patent/EP1665304B1/en not_active Revoked
- 2003-09-13 AT AT03750542T patent/ATE365970T1/en not_active IP Right Cessation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2461108C1 (en) * | 2011-07-14 | 2012-09-10 | Общество с ограниченной ответственностью "Техкам-Сервис" | Electromechanical switch |
| RU173314U1 (en) * | 2017-05-12 | 2017-08-22 | Алексей Алексеевич Еремин | ELECTROMECHANICAL SWITCHING DEVICE FOR ENSURING UNINTERRUPTED POWER SUPPLY OF CONSUMERS |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2005034156A1 (en) | 2005-04-14 |
| AU2003270192A1 (en) | 2005-04-21 |
| US20060220470A1 (en) | 2006-10-05 |
| JP2007515744A (en) | 2007-06-14 |
| US8035329B2 (en) | 2011-10-11 |
| CN100458995C (en) | 2009-02-04 |
| CN1839455A (en) | 2006-09-27 |
| DE50307589D1 (en) | 2007-08-09 |
| ATE365970T1 (en) | 2007-07-15 |
| EP1665304A1 (en) | 2006-06-07 |
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