EP1508196B1 - Motor drive - Google Patents

Motor drive Download PDF

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Publication number
EP1508196B1
EP1508196B1 EP03755038A EP03755038A EP1508196B1 EP 1508196 B1 EP1508196 B1 EP 1508196B1 EP 03755038 A EP03755038 A EP 03755038A EP 03755038 A EP03755038 A EP 03755038A EP 1508196 B1 EP1508196 B1 EP 1508196B1
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EP
European Patent Office
Prior art keywords
cam
motor
switching
switch
motor drive
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.)
Expired - Lifetime
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EP03755038A
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German (de)
French (fr)
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EP1508196A1 (en
Inventor
Jürgen ACH
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.)
Maschinenfabrik Reinhausen GmbH
Scheubeck GmbH and Co
Original Assignee
Maschinenfabrik Reinhausen GmbH
Maschinenfabrik Reinhausen Gebrueder Scheubeck GmbH and Co KG
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Application filed by Maschinenfabrik Reinhausen GmbH, Maschinenfabrik Reinhausen Gebrueder Scheubeck GmbH and Co KG filed Critical Maschinenfabrik Reinhausen GmbH
Publication of EP1508196A1 publication Critical patent/EP1508196A1/en
Application granted granted Critical
Publication of EP1508196B1 publication Critical patent/EP1508196B1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/0005—Tap change devices

Definitions

  • the invention relates to a motor drive for tap changers, diverter and Tauchkernspulen according to the preamble of the first claim.
  • a motor drive is known from WO 98/38661 known.
  • the aforementioned motor drive is used to set the tap changer, the diverter or the Tauchkernspule to the respective desired operating position; in it are all mechanical and electrical assemblies required to drive unites.
  • the load gearbox directly actuates the tap changer o. it has one correspondingly dimensioned electric motor as a drive motor.
  • the steering gear contains a Cam disc, the o. At each switching of the tap changer o. The like., D. H. Operation of the Motor drive turns by one full turn.
  • This cam disc contains switching cams for Actuation of various cam switches, which in turn are part of the still to be explained electrical assembly are.
  • the control gear further includes means for displaying the Tap position or the switching step during the changeover.
  • the electrical components in the motor drive consist of various circuits; these include the motor circuit, where the terminals of the drive motor are controlled by brake contactors, Motor contactors and other switching means are connected to the power supply line. This includes furthermore the control circuit and various signaling circuits and trip circuits for Motor protection switch.
  • the control of the motor drive takes place according to the principle of Step switching, d. H. an adjustment to a switching step is a one-off Control impulse initiated and then inevitably - practically unstoppable - completed.
  • the Output shaft of the motor drive which, actuated by the drive motor, with the drive shaft of the Tap changer o. The like. Is coupled, doing a well-defined number of Revolutions.
  • the duration of this stepping circuit is controlled by a control mock of the Control gear determined with exactly one revolution per stage.
  • IEC 60214 The described basic functions of the motor drive are defined in IEC 60214.
  • This IEC requires u. a. also a passage protection device, which in case of failure an uncontrolled Passing through the motor drive until its end position prevented.
  • the stepping of the motor drive can be caused by a "sticky" motor contactor, defective Cam switch, a defective contactor coil or too large a caster of the Drive motor come.
  • the required Pass-through protection reliably trigger the motor protection switch and thus the Shut down the motor drive in order to justify its undesired passage through to the end position prevent.
  • WO 98/38661 is another Pass-through protection known, in the control gear two additional control cam are present, which correspond to additional cam-controlled monitoring contacts and monitor the operating states of the contactors during runtime.
  • This Pass-through protection checks one of the additional monitoring contacts at the beginning of the each switching operation, whether one of the motor contactors is activated and the Step contactor is not actuated.
  • the other of the two monitoring contacts checks approximately in the Mid of the respective switching from, if then the stepper contactor is actuated. Is this not the case, the trip coil of the motor protection switch is actuated and thus the motor drive stopped.
  • First of all is at the first Monitoring contact for checking the switching states at the beginning of the switching process
  • the two monitoring contacts according to the prior art are not intrinsically safe, d. H. the failure of one of these contacts does not occur during normal operation detected and leads in the event of an error to an uncontrolled passage of the motor drive in the End position - the passage protection device is ineffective in such a case. Furthermore It may occur in the known solution that the second of the two described Monitoring contacts in the middle of the switching process detects an error, what intended to trigger the motor protection switch leads in a circuit of the However, tap-changer with about a selection is problematic because at this time while the selection is still open.
  • the object of the invention is to provide a motor drive of the type mentioned, the described disadvantages of the prior art does not have and with technically simple and cost-effective means a reliable continuous protection allows, with the individual Components should be self-monitoring, d. H. also internal errors of the continuous protection device should be recorded.
  • the inventive arrangement and operating sequence of the two cam switch for Run-through protection has many advantages. First of all, both are cam switches independent of direction, d. H. regardless of the direction of rotation of the output shaft of the motor drive, As a result, the operation is inexpensive and without high mechanical complexity to realize. In addition, the arrangement of the two cam switch is intrinsically safe, d. H. remains one of the two In the event of a fault, the switch will stick or stick to the motor protection switch during this circuit actuated. Furthermore takes place by the selected operating sequence and thus the intended Verification periods during switching the check outside the Selection circuit on tap changer instead.
  • Throughput positions in the motor drive which, Due to the particular design of the tap changer to be operated o. The like., Without additional Pulse simply be overrun automatically.
  • a built-in motor drive Position signaling device reached.
  • Such a position signaling device is z. B. from the WO 98/53276 known. It consists of a position indicator board, a position indicator module and a connection cable.
  • the position report module simulates a changer which is in a passage position, d. H. the automatic override of a position, its switching position changes.
  • FIG. 3 in conjunction with FIG. 2 just explained, shows that the cam switches S1, S2 depending on the direction of rotation in each case from 3 ... 29 switching step units and from 4 ... 30 Switching step units are operated; they are so interconnected that depending on the Direction of rotation at the two intermediate terminals 12, 13 a pulse of 3 ... 4 and 29 ... 30 Switching step units results.
  • the series connection K1: 83-84 and K20: 84-83 or K2: 83-84 and K20: 84-83 is the beginning the circuit in the switching step units 3 ... 4 ensures that the stepper contactor is not is still actuated by the last circuit.
  • both cam switches are actuated independently of direction. Femer lets himself recognize that both switches are intrinsically safe, d. H. remains one of the two cam switch S1 or S2 hanging or sticking, is operated in the course of the circuit of the motor protection switch. In that the two monitoring periods at the beginning as well as the end of the whole Switching are made, it ensures that the check of the switching states outside the operation of a connected about the tap changer preselector takes place.
  • FIG. 5 shows a second motor drive according to the invention, which has an additional motor drive Cam switch S37, which is designed as a normally closed contact, contains over the entire positioning range can be operated.
  • Cam switch S37 which is designed as a normally closed contact, contains over the entire positioning range can be operated.
  • the positions of the Motor drive which, as explained above, to be run over, triggers are provided, which briefly actuate the additional cam switch S37.
  • This additional cam switch S37 Shortly before the end of the circuit, the stepping contactor K20 drops off. At this time are all checks of the continuous protection device with the cam contacts S1 and S2 already completed. The electrical latching of the motor contactors is reactivated and the motor drive makes another circuit.
  • This cam switch S37 is intrinsically safe, d. H.
  • the pass-through protection contacts S1 or S2 fall back and the relay for automatic position sweep K37 drops off.
  • the contact K37: 21-24 opens and interrupts self-holding of stepper contactor K20.
  • the contacts K20: 21-22 or K20: 31-32 fall back and activate again the electrical latching of the motor contactors K1: 73-74, K2: 73-74.
  • the circuit does not coincide with the relapse of the mechanical self-holding contacts for the respective direction S12, S14 ended, it is rather a further circuit initiated.

Landscapes

  • Motor And Converter Starters (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
  • Control Of Stepping Motors (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Valve Device For Special Equipments (AREA)
  • Mechanisms For Operating Contacts (AREA)

Abstract

The motorized drive has a load drive train with an electric motor acting directly on the stepping switch and a control drive train with a cam disc having control cams for operation of a mechanical cam switch for a stepping switch relay and for operation of additional cam switches (S1,S2) for switching the rotation direction of the electric motor. When only one of the additional cam switches is closed the motor protection switch is used for bringing the motor to a standstill.

Description

Die Erfindung betrifft einen Motorantrieb für Stufenschalter, Umsteller und Tauchkernspulen gemäß dem Oberbegriff des ersten Patentanspruches. Ein solcher Motorantrieb ist aus der WO 98/38661 bekannt.The invention relates to a motor drive for tap changers, diverter and Tauchkernspulen according to the preamble of the first claim. Such a motor drive is known from WO 98/38661 known.

Der eingangs genannte Motorantrieb dient zur Einstellung des Stufenschalters, des Umstellers oder der Tauchkernspule auf die jeweils gewünschte Betriebsstellung; in ihm sind alle mechanischen und elektrischen Baugruppen, die zum Antrieb erforderlich sind, vereinigt.The aforementioned motor drive is used to set the tap changer, the diverter or the Tauchkernspule to the respective desired operating position; in it are all mechanical and electrical assemblies required to drive unites.

Aus der Firmenschrift BA 47/91 de "Motorantriebe" der Anmelderin ist der prinzipielle Aufbau eines solchen Motorantriebes bekannt. Wichtige mechanische Baugruppen sind das Lastgetriebe und das Steuergetriebe. Das Lastgetriebe betätigt direkt den Stufenschalter o. dgl.; es weist dazu einen entsprechend dimensionierten Elektromotor als Antriebsmotor auf. Das Steuergetriebe enthält eine Nockenscheibe, die sich bei jeder Umschaltung des Stufenschalters o. dgl., d. h. Betätigung des Motorantriebes, um eine volle Umdrehung dreht. Diese Nockenscheibe enthält Schaltnocken zur Betätigung verschiedenster Nockenschalter, die ihrerseits Bestandteil der noch zu erläuternden elektrischen Baugruppe sind. Das Steuergetriebe enthält weiterhin Mittel zur Anzeige der Stufenstellung bzw. des Schaltschrittes während der Umschaltung.From the company brochure BA 47/91 de "motor drives" of the applicant is the basic structure of a such motor drive known. Important mechanical assemblies are the load gear and the Control gear. The load gearbox directly actuates the tap changer o. it has one correspondingly dimensioned electric motor as a drive motor. The steering gear contains a Cam disc, the o. At each switching of the tap changer o. The like., D. H. Operation of the Motor drive turns by one full turn. This cam disc contains switching cams for Actuation of various cam switches, which in turn are part of the still to be explained electrical assembly are. The control gear further includes means for displaying the Tap position or the switching step during the changeover.

Die elektrischen Baugruppen im Motorantrieb bestehen aus den verschiedensten Stromkreisen; dazu gehören der Motorstromkreis, bei dem die Klemmen des Antriebsmotors über Bremsschütze, Motorschütze und andere Schaltmittel mit der Stromzuleitung verbunden sind. Dazu gehören weiterhin der Steuerstromkreis und verschiedene Meldestromkreise und Auslösestromkreise für Motorschutzschalter. Die Steuerung des Motorantriebes erfolgt nach dem Prinzip der Schrittschaltung, d. h. ein Verstellvorgang um einen Schaltschritt wird durch einen einmaligen Steuerimpuls eingeleitet und danach zwangsläufig - praktisch unaufhaltsam - zu Ende geführt. Die Abtriebswelle des Motorantriebes, die, von dessen Antriebsmotor betätigt, mit der Antriebswelle des Stufenschalters o. dgl. gekuppelt ist, vollführt dabei eine genau festgelegte Anzahl von Umdrehungen. Die Laufzeit dieser Schrittschaltung wird durch eine Steuemocke des Steuergetriebes mit genau einer Umdrehung je Stufe bestimmt.The electrical components in the motor drive consist of various circuits; these include the motor circuit, where the terminals of the drive motor are controlled by brake contactors, Motor contactors and other switching means are connected to the power supply line. This includes furthermore the control circuit and various signaling circuits and trip circuits for Motor protection switch. The control of the motor drive takes place according to the principle of Step switching, d. H. an adjustment to a switching step is a one-off Control impulse initiated and then inevitably - practically unstoppable - completed. The Output shaft of the motor drive, which, actuated by the drive motor, with the drive shaft of the Tap changer o. The like. Is coupled, doing a well-defined number of Revolutions. The duration of this stepping circuit is controlled by a control mock of the Control gear determined with exactly one revolution per stage.

Die erläuterten notwendigen Grundfunktionen des Motorantriebes sind in der IEC 60214 festgelegt. Diese IEC fordert u. a. auch eine Durchlaufschutzeinrichtung, die im Fehlerfall ein unkontrolliertes Durchlaufen des Motorantriebes bis in dessen Endstellung verhindert. Zu einem solchen Versagen der Schrittschaltung des Motorantriebes kann es durch ein "klebendes" Motorschütz, defekte Nockenschalter, eine defekte Schützspule oder auch durch einen zu großen Nachlauf des Antriebsmotors kommen. In einem solchen Fehlerfall muss die geforderte Durchlaufschutzeinrichtung zuverlässig den Motorschutzschalter auslösen und damit den Motorantrieb stillsetzen, um dessen unerwünschtes Durchlaufen bis in die Endposition gerade zu verhindern.The described basic functions of the motor drive are defined in IEC 60214. This IEC requires u. a. also a passage protection device, which in case of failure an uncontrolled Passing through the motor drive until its end position prevented. To such a failure The stepping of the motor drive can be caused by a "sticky" motor contactor, defective Cam switch, a defective contactor coil or too large a caster of the Drive motor come. In such an error case, the required Pass-through protection reliably trigger the motor protection switch and thus the Shut down the motor drive in order to justify its undesired passage through to the end position prevent.

Dazu ist es aus der bereits genannten Firmenschrift BA 47/91de "Motorantriebe" bereits bekannt, die Laufzeit des Motorantriebes mittels eines Zeitrelais zu überwachen, wobei das Zeitrelais dabei auf die maximal mögliche Laufzeit des Motorantriebes einschließlich ggf. erforderlicher Durchlaufstellungen eingestellt wird. Nachteilig dabei sind die hohen Kosten eines solchen Zeitrelais, die Fehleranfälligkeit der Elektronik bei rauem Trafobetrieb und die relativ späte Fehlererkennung bei Motorantrieben mit mehreren Durchlaufstellungen. Außerdem wird ein Defekt im Zeitrelais selbst nicht erkannt und damit der gesamte Durchlaufschutz wirkungslos.For this purpose, it is already known from the aforementioned company document BA 47 / 91de "motor drives", To monitor the duration of the motor drive by means of a time relay, the time relay thereby to the maximum possible running time of the motor drive including possibly required Continuous positions is set. The disadvantage here is the high cost of such Timers, the susceptibility of the electronics in rough transformer operation and the relatively late Error detection on motor drives with several feed-through positions. In addition, a defect in the time relay itself not recognized and thus the entire pass protection ineffective.

Aus der eingangs ebenfalls bereits genannten WO 98/38661 ist eine weitere Durchlaufschutzeinrichtung bekannt, bei der im Steuergetriebe zwei zusätzliche Steuemocken vorhanden sind, die mit zusätzlichen nockengesteuerten Überwachungskontakten korrespondieren und die Betriebszustände der Schütze während der Laufzeit überwachen. Bei dieser Durchlaufschutzeinrichtung prüft einer der zusätzlichen Überwachungskontakte zu Beginn des jeweiligen Umschaltvorganges ab, ob einer der Motorschütze aktiviert ist und das Schrittschaltschütz nicht betätigt ist. Der andere der beiden Überwachungskontakte prüft etwa in der Mitte des jeweiligen Umschaltvorganges ab, ob dann das Schrittschaltschütz betätigt ist. Ist dies nicht der Fall, wird die Auslösespule des Motorschutzschalters betätigt und damit der Motorantrieb stillgesetzt. Auch dabei treten verschiedene Nachteile auf: Zunächst einmal ist bei dem ersten Überwachungskontakt zur Überprüfung der Schaltzustände zu Beginn des Umschaltvorganges ein richtungsabhängiges Schaltverhalten nötig. Dies erfordert eine aufwändige und kostenintensive Mechanik. Des Weiteren sind die beiden Überwachungskontakte nach dem Stand der Technik nicht eigensicher aufgebaut, d. h. der Ausfall eines dieser Kontakte wird im normalen Betrieb nicht erkannt und führt im Fehlerfall zu einem unkontrollierten Durchlauf des Motorantriebes in die Endstellung - die Durchlaufschutzeinrichtung ist in einem solchen Fall wirkungslos. Des Weiteren kann es bei der bekannten Lösung auftreten, dass der zweite der beiden beschriebenen Überwachungskontakte etwa in der Mitte des Umschaltvorganges einen Fehler erkennt, was bestimmungsgemäß zur Auslösung des Motorschutzschalters führt, bei einer Schaltung des Stufenschalters etwa mit einem Vorwähler jedoch problematisch ist, da zu diesem Zeitpunkt während der Umschaltung der Vorwähler noch geöffnet ist. From the initially also mentioned above WO 98/38661 is another Pass-through protection known, in the control gear two additional control cam are present, which correspond to additional cam-controlled monitoring contacts and monitor the operating states of the contactors during runtime. At this Pass-through protection checks one of the additional monitoring contacts at the beginning of the each switching operation, whether one of the motor contactors is activated and the Step contactor is not actuated. The other of the two monitoring contacts checks approximately in the Mid of the respective switching from, if then the stepper contactor is actuated. Is this not the case, the trip coil of the motor protection switch is actuated and thus the motor drive stopped. Also, there are several disadvantages: First of all is at the first Monitoring contact for checking the switching states at the beginning of the switching process Directional switching behavior required. This requires a complex and expensive Mechanics. Furthermore, the two monitoring contacts according to the prior art are not intrinsically safe, d. H. the failure of one of these contacts does not occur during normal operation detected and leads in the event of an error to an uncontrolled passage of the motor drive in the End position - the passage protection device is ineffective in such a case. Furthermore It may occur in the known solution that the second of the two described Monitoring contacts in the middle of the switching process detects an error, what intended to trigger the motor protection switch leads in a circuit of the However, tap-changer with about a selection is problematic because at this time while the selection is still open.

Aufgabe der Erfindung ist es, einen Motorantrieb der eingangs genannten Art anzugeben, der die beschriebenen Nachteile des Standes der Technik nicht aufweist und mit technisch einfachen und kostengünstigen Mitteln einen zuverlässigen Durchlaufschutz ermöglicht, wobei die einzelnen Bauteile selbstüberwachend sein sollen, d. h. auch interne Fehler der Durchlaufschutzeinrichtung erfasst werden sollen.The object of the invention is to provide a motor drive of the type mentioned, the described disadvantages of the prior art does not have and with technically simple and cost-effective means a reliable continuous protection allows, with the individual Components should be self-monitoring, d. H. also internal errors of the continuous protection device should be recorded.

Diese Aufgabe wird durch einen Motorantrieb mit den Merkmalen des ersten Patentanspruches gelöst. Die Unteransprüche betreffen vorteilhafte Weiterbildungen der Erfindung.This object is achieved by a motor drive with the features of the first claim solved. The subclaims relate to advantageous developments of the invention.

Die erfindungsgemäße Anordnung und Betätigungssequenz der beiden Nockenschalter zum Durchlaufschutz weist zahlreiche Vorteile auf. Zunächst einmal sind beide Nockenschalter richtungsunabhängig, d. h. unabhängig von der Drehrichtung der Abtriebswelle des Motorantriebes, dadurch ist die Betätigung kostengünstig und ohne hohen mechanischen Aufwand zu realisieren. Zudem ist die Anordnung der beiden Nockenschalter eigensicher, d. h. bleibt einer der beiden Schalter im Fehlerfall hängen oder kleben, wird im Laufe dieser Schaltung der Motorschutzschalter betätigt. Weiterhin findet durch die gewählte Betätigungssequenz und damit die vorgesehenen Überprüfungszeiträume während der Umschaltung die Überprüfung außerhalb der Vorwählerschaltung am Stufenschalter statt.The inventive arrangement and operating sequence of the two cam switch for Run-through protection has many advantages. First of all, both are cam switches independent of direction, d. H. regardless of the direction of rotation of the output shaft of the motor drive, As a result, the operation is inexpensive and without high mechanical complexity to realize. In addition, the arrangement of the two cam switch is intrinsically safe, d. H. remains one of the two In the event of a fault, the switch will stick or stick to the motor protection switch during this circuit actuated. Furthermore takes place by the selected operating sequence and thus the intended Verification periods during switching the check outside the Selection circuit on tap changer instead.

Ein besonderes Problem bei einem Motorantrieb mit einem Durchlaufschutz, auch beim erfindungsgemäßen Motorantrieb, stellen sogen. Durchlaufstellungen im Motorantrieb dar, die, bedingt durch die jeweilige Bauart des zu betätigenden Stufenschalters o. dgl., ohne zusätzlichen Impuls einfach automatisch überfahren werden. Dies wird über eine in den Motorantrieb eingebaute Stellungsmeldeeinrichtung erreicht. Eine solche Stellungsmeldeeinrichtung ist z. B. aus der WO 98/53276 bekannt. Sie besteht aus einer Stellungsmeldeplatine, einem Stellungsmeldemodul und einem Verbindungskabel. Mit dem Stellungsmeldemodul wird ein Wechsler simuliert, der in einer Durchlaufstellung, d. h. dem automatischen Überfahren einer Position, seine Schaltposition ändert. Über diesen Wechsler wird Spannung an die Spule des jeweiligen Motorschütz gelegt, damit dieses über das Ende der Stellung hinaus angezogen bleibt. Hierzu ist es notwendig, für diesen Zeitraum eine bekannte Durchlaufschutzeinrichtung zu deaktivieren, da sie dieses gewollte Schaltverhalten sonst als Fehler erkennt. Bei dieser technischen Lösung zur Realisierung von Durchlaufstellungen ergeben sich verschiedene Nachteile. Zunächst einmal ist die notwendige Stellungsmeldeeinrichtung aufwändig und teuer, zudem werden interne Fehler in der Stellungsmeldeeinrichtung nicht erkannt. Ebenso gravierend ist jedoch, dass, wie erläutert, die Durchlaufschutzeinrichtung - d. h. die Sicherheitseinrichtungl - zumindest kurzzeitig deaktiviert werden muss. In besonders vorteilhafter Weiterbildung der Erfindung ist daher im Stellungsmeldegetriebe ein zusätzlicher Nockenschalter als Öffner vorgesehen, der über den kompletten Stellungsbereich betätigt werden kann. In den jeweiligen Durchlaufstellungen sind Auslöser vorgesehen. Dabei lässt der zusätzliche Nockenschalter kurz vor Ende der Schaltung das Schrittschaltschütz abfallen. Zu diesem Zeitpunkt sind alle Überprüfungen der Durchlaufschutzeinrichtung bereits abgeschlossen. In der Folge wird die elektrische Selbsthaltung der Motorschütze reaktiviert und der Motorantrieb macht eine weitere Schaltung; eine separate Stellungsmeldeeinrichtung ist ebenso wenig erforderlich wie ein Deaktivieren der Durchlaufschutzeinrichtung.A particular problem with a motor drive with a continuous protection, even when Motor drive according to the invention, put so-called. Throughput positions in the motor drive, which, Due to the particular design of the tap changer to be operated o. The like., Without additional Pulse simply be overrun automatically. This is via a built-in motor drive Position signaling device reached. Such a position signaling device is z. B. from the WO 98/53276 known. It consists of a position indicator board, a position indicator module and a connection cable. The position report module simulates a changer which is in a passage position, d. H. the automatic override of a position, its switching position changes. Through this changer voltage is applied to the coil of the respective motor contactor, so this remains attracted beyond the end of the position. For this it is necessary for this Period to deactivate a known pass-through protection, as they wanted this Switching behavior otherwise recognizes as an error. In this technical solution for the realization of Passages result in various disadvantages. First of all, the necessary Position signaling device consuming and expensive, also be internal errors in the Position signaling device not recognized. Equally serious, however, is that, as explained, the Pass-through protection - d. H. the safety device 1 - at least temporarily deactivated must become. In a particularly advantageous embodiment of the invention is therefore in Position signal transmission an additional cam switch provided as an opener, via the complete position range can be actuated. In the respective passages are Shutter provided. The additional cam switch leaves this shortly before the end of the circuit Step contactor fall off. At this time, all reviews are the Pass-through protection already completed. As a result, the electric self-holding the motor contactor reactivates and the motor drive makes another circuit; A separate Positioning device is just as little required as a deactivation of the Pass protection device.

Die Erfindung soll nachfolgend an Hand von Zeichnungen beispielhaft noch näher erläutert werden.
Es zeigen:

Fig. 1
ein Schaltdiagramm der beiden Nockenschalter für die Durchlaufschutzeinrichtung nach dem Stand der Technik
Fig. 2
ein Schaltdiagramm der beiden Nockenschalter bei einem ersten erfindungsgemäßen Motorantrieb
Fig. 3
einen Ausschnitt aus der Steuerschaltung dieses Motorantriebes
Fig. 4
die vollständige Durchlaufschutzeinrichtung innerhalb der Steuerschaltung dieses Motorantriebes
Fig. 5
eine Steuerschaltung bei einem zweiten erfindungsgemäßen Motorantrieb.
The invention will be explained in more detail by way of example with reference to drawings.
Show it:
Fig. 1
a circuit diagram of the two cam switch for the passage protection device according to the prior art
Fig. 2
a circuit diagram of the two cam switch in a first motor drive according to the invention
Fig. 3
a section of the control circuit of this motor drive
Fig. 4
the full pass-protection device within the control circuit of this motor drive
Fig. 5
a control circuit in a second motor drive according to the invention.

Zunächst soll noch einmal kurz zum Vergleich an Hand von Figur 1 der Stand der Technik beschrieben werden, so wie er sich aus der WO 98/38661 ergibt. Bei dieser Durchlaufschutzeinrichtung prüft einer der beiden Nockenschalter S1 zu Beginn der Schaltung zwischen Schaltschritteinheit 2 und 3 ab, ob einer der Motorschütze K1, K2 aktiviert ist und der Schrittschaltschütz K20 nicht betätigt ist. Der zweite Nockenschalter S2 prüft etwa in der Mitte der Schaltung im 17. Schaltschritt ab, ob das Schrittschaltschütz K20 jetzt betätigt ist; ist dies nicht der Fall, wird die Auslösespule des Motorschutzschalters betätigt. Es liegt auf der Hand, dass zumindestens beim Nockenschalter S1 zur Überprüfung der Schaltzustände am Anfang der Schaltung ein nur aufwändig zu realisierendes richtungsabhängiges Schaltverhalten notwendig ist, worauf weiter oben bereits hingewiesen wurde.First, again briefly for comparison with reference to Figure 1 of the prior art described as it results from WO 98/38661. At this Pass-through protection device checks one of the two cam switch S1 at the beginning of the circuit between switching step unit 2 and 3 from whether one of the motor contactors K1, K2 is activated and the Stepping contactor K20 is not actuated. The second cam switch S2 checks approximately in the middle of Circuit in the 17th switching step, whether the step contactor K20 is now operated; is not this Case, the trip coil of the motor protection switch is actuated. It is obvious, that at least when the cam switch S1 to check the switching states at the beginning of Circuit is only a complex to be realized direction-dependent switching behavior is necessary, which has already been pointed out above.

Nachfolgend soll an Hand der Figur 2 die Betätigungssequenz der beiden Nockenschalter bei einem ersten erfindungsgemäßen Motorantrieb erläutert werden. Vorausgeschickt wird, dass auch hier wie beim Stand der Technik eine vollständige Umschaltung aus 33 Schaltschritten besteht. Der Nockenschalter S1 wird in Drehrichtung "rechts" oder "+" auf eine Betätigung in den Schaltschritteinheiten 3...29, der Nockenschalter S2 in derselben Drehrichtung auf eine Betätigung in den Schaltschritteinheiten 4...30 eingestellt. In Drehrichtung "links" bzw. "-" ergibt sich ein entgegengesetztes Verhalten für S1 (Schaltschritteinheiten 4...30) sowie analog für S2 (Schaltschritteinheiten 3...29). Beide Nockenschalter sind damit richtungsunabhängig und benötigen keine aufwändige Mechanik zu ihrer Betätigung. Die beiden Schaltpunkte bzw. Zeitbereiche zwischen den Schaltschritteinheiten 3...4 und 29...30, in denen die beiden Nockenschalter S1 und S2 nicht überlappend betätigt sind, können durch eine entsprechende Schaltung ausgewertet und erfindungsgemäß als Überbrückungszeitpunkte für die Durchlaufschutzeinrichtung verwendet werden.Hereinafter, the sequence of operation of the two cam switch at a first motor drive according to the invention are explained. It is sent ahead, too, here as well In the prior art, a complete switching consists of 33 switching steps. Of the Cam switch S1 is in the direction of rotation "right" or "+" to an operation in the Switching step units 3 ... 29, the cam switch S2 in the same direction of rotation to an operation set in the switching step units 4 ... 30. In the direction of rotation "left" or "-", this results in a opposite behavior for S1 (switching step units 4 ... 30) as well as for S2 (Switching step units 3 ... 29). Both cam switches are thus direction independent and require no elaborate mechanics for their operation. The two switching points or time ranges between the switching step units 3 ... 4 and 29 ... 30, in which the two cam switches S1 and S2 are not overlapping actuated, can be evaluated by an appropriate circuit and used according to the invention as bridging times for the passage protection device become.

Die hier an Hand konkret ausgewählter Schaltschritte dargestellte Betätigungssequenz der beiden Nockenschalter S1 und S2 kann auch auf allgemeine Weise dargestellt werden, da die Erfindung nicht auf die beispielhaft ausgewählten Werte begrenzt ist. Geht man aus von einer Umschaltung mit n Schaltschritten so erfolgt die Betätigung von S1 während der Schaltschritte a...b, die von S2 während der Schaltschritte (a + 1)...(b + 1) mit dem Symmetriekriterium a = n -(b + 1). Dabei ist wiederum vorausgesetzt, dass der Zeitraum, in dem jeweils nur ein Nockenschalter betätigt ist, gerade einen Schaltschritt beträgt. Bezeichnet man diesen Zeitraum ganz allgemein mit x für eine beliebige Zahl von Schaltschritten, so ergibt sich noch allgemeiner für die Betätigung von S1 der Zeitraum der Schaltschritte a...b und für S2 dann (a + x)...(b + x) mit dem allgemeinen Symmetriekriterium a = n -(b + x).The here on hand selected concrete switching steps shown actuating sequence of the two Cam switches S1 and S2 can also be represented in a general way, since the invention is not limited to the exemplarily selected values. If one assumes a changeover with n switching steps, the actuation of S1 takes place during the switching steps a... b, that of S2 during the switching steps (a + 1) ... (b + 1) with the symmetry criterion a = n - (b + 1). It is again provided that the period in which only one cam switch is actuated, is just a switching step. If you call this period in general with x for one any number of switching steps, it is even more general for the operation of S1 of Period of the switching steps a ... b and for S2 then (a + x) ... (b + x) with the general Symmetry criterion a = n - (b + x).

Aus Figur 3 ist in Verbindung mit der gerade erläuterten Figur 2 ersichtlich, dass die Nockenschalter S1, S2 abhängig von der Drehrichtung jeweils von 3...29 Schaltschritteinheiten und von 4...30 Schaltschritteinheiten betätigt werden; sie sind so verschaltet, dass sich abhängig von der Drehrichtung an den beiden Zwischenklemmen 12, 13 ein Impuls von 3...4 und von 29...30 Schaltschritteinheiten ergibt.FIG. 3, in conjunction with FIG. 2 just explained, shows that the cam switches S1, S2 depending on the direction of rotation in each case from 3 ... 29 switching step units and from 4 ... 30 Switching step units are operated; they are so interconnected that depending on the Direction of rotation at the two intermediate terminals 12, 13 a pulse of 3 ... 4 and 29 ... 30 Switching step units results.

Aus Figur 4, in der der vollständige Schaltungsteil der Durchlaufschutzeinrichtung gezeigt ist, ist zu sehen, dass über die Reihenschaltung K1:61-62 und K20:62-61 bzw. K2:61-62 und K20:62-61 zu Beginn der Schaltung in den Schaltschritteinheiten 3...4 überprüft wird, ob der Motorschütz K1/K2 für die jeweilige Richtung aktiv ist.From Figure 4, in which the complete circuit part of the passage protection device is shown, is to see that via the series connection K1: 61-62 and K20: 62-61 and K2: 61-62 and K20: 62-61 too Beginning of the circuit in the switching step units 3 ... 4 is checked whether the motor contactor K1 / K2 is active for the respective direction.

Ober die Reihenschaltung K1:83-84 und K20:84-83 bzw. K2:83-84 und K20:84-83 wird zu Beginn der Schaltung in den Schaltschritteinheiten 3...4 sichergestellt, dass das Schrittschaltschütz nicht noch von der letzten Schaltung betätigt ist. The series connection K1: 83-84 and K20: 84-83 or K2: 83-84 and K20: 84-83 is the beginning the circuit in the switching step units 3 ... 4 ensures that the stepper contactor is not is still actuated by the last circuit.

Über die Reihenschaltung K2:61-62 und K20:62-61 bzw. K1:61-62 und K20:62-61 wird am Ende der Schaltung während der Schaltschritteinheiten 29...30 überprüft, ob das Schrittschaltschütz jetzt betätigt ist.Via the serial connection K2: 61-62 and K20: 62-61 or K1: 61-62 and K20: 62-61 will be at the end the circuit during the switching step units 29 ... 30 checks whether the step contactor now is pressed.

Es ist zu sehen, dass beide Nockenschalter richtungsunabhängig betätigt werden. Femer lässt sich erkennen, dass beide Schalter eigensicher sind, d. h. bleibt einer der beiden Nockenschalter S1 oder S2 hängen oder kleben, wird im Laufe der Schaltung der Motorschutzschalter betätigt. Dadurch, dass die beiden Überwachungszeiträume an den Anfang sowie das Ende der gesamten Umschaltung gelegt sind, wird sichergestellt, dass die Überprüfung der Schaltzustände außerhalb der Betätigung eines etwa am Stufenschalter angeschlossenen Vorwählers erfolgt.It can be seen that both cam switches are actuated independently of direction. Femer lets himself recognize that both switches are intrinsically safe, d. H. remains one of the two cam switch S1 or S2 hanging or sticking, is operated in the course of the circuit of the motor protection switch. In that the two monitoring periods at the beginning as well as the end of the whole Switching are made, it ensures that the check of the switching states outside the operation of a connected about the tap changer preselector takes place.

In Figur 5 ist ein zweiter erfindungsgemäßer Motorantrieb gezeigt, der einen zusätzlichen Nockenschalter S37, der als Öffner ausgeführt ist, enthält, der über den gesamten Stellungsbereich betätigt werden kann. In den jeweiligen Durchlaufstellungen, d. h. den Stellungen des Motorantriebes, die, wie weiter oben erläutert, überfahren werden sollen, sind Auslöser vorgesehen, die den zusätzlichen Nockenschalter S37 kurz betätigen. Dieser zusätzlicher Nockenschalter S37 lässt kurz vor Ende der Schaltung das Schrittschaltschütz K20 abfallen. Zu diesem Zeitpunkt sind alle Überprüfungen der Durchlaufschutzeinrichtung mit den Nockenkontakten S1 und S2 bereits abgeschlossen. Die elektrische Selbsthaltung der Motorschütze wird reaktiviert und der Motorantrieb macht eine weitere Schaltung. Auch dieser Nockenschalter S37 ist eigensicher, d. h. bei seinem Ausfall oder Kleben kommt es nicht zu einem unkontrolliertem Durchlaufen in die Endstellung. Bei dieser Ausführungsform der Erfindung ist keine Deaktivierung der eigentlichen Durchlaufschutzeinrichtung mit ihren Nockenschaltem S1 und S2 nötig, zudem kann die kostenintensive Stellungsmeldeeinrichtung, die nach dem Stand der Technik erforderlich ist, vollständig wegfallen.FIG. 5 shows a second motor drive according to the invention, which has an additional motor drive Cam switch S37, which is designed as a normally closed contact, contains over the entire positioning range can be operated. In the respective passages, d. H. the positions of the Motor drive, which, as explained above, to be run over, triggers are provided, which briefly actuate the additional cam switch S37. This additional cam switch S37 Shortly before the end of the circuit, the stepping contactor K20 drops off. At this time are all checks of the continuous protection device with the cam contacts S1 and S2 already completed. The electrical latching of the motor contactors is reactivated and the motor drive makes another circuit. This cam switch S37 is intrinsically safe, d. H. at his Failure or sticking does not lead to an uncontrolled passage in the end position. at This embodiment of the invention is not a deactivation of the actual Durchlaufschutzeinrichtung with their cam switches S1 and S2 necessary, in addition, the cost-intensive position indicator, which is required in the prior art, completely eliminated.

Nachfolgend soll noch einmal detailliert an Hand der Figur 5 ein Umschaltvorgang in allen Einzelheiten erläutert werden:
3 Schaltschritteinheiten nach Beginn der Schaltung wird einer der Durchlaufschutzkontakte S1 bzw. S2 betätigt. Ober die Zwischenklemme X20:14 wird Spannung an die Spule von K37 gelegt. Der Kontakt K37:21-24 im parallelen Selbsthaltekreis des Schrittschaltschützes für den Durchlauf schließt.In the following, a switching process will be explained in detail again with reference to FIG. 5:
3 switching step units after the start of the circuit one of the pass-through protection contacts S1 and S2 is actuated. Over the intermediate terminal X20: 14 voltage is applied to the coil of K37. Contact K37: 21-24 in the step-contactor's parallel latching circuit closes.

In einer Durchlaufstellung wird nach 25...27 Schaltschritteinheiten der Durchlaufkontakt S37:C-NC, der eigentliche Selbsthaltekreis, geöffnet. Das Schrittschaltschütz hält sich nur noch über K37:21-24 und K20:53-54. In a continuous position, after 25 ... 27 switching step units, the flow contact S37: C-NC, the actual self-holding circuit, opened. The step contactor only holds over K37: 21-24 and K20: 53-54.

Nach 30 Schaltschritteinheiten fallen die Durchlaufschutzkontakte S1 bzw. S2 zurück und das Relais für den automatischen Stellungsdurchlauf K37 fällt ab. Der Kontakt K37:21-24 öffnet und unterbricht die Selbsthaltung des Schrittschaltschützes K20. Die Kontakte K20:21-22 bzw. K20:31-32 fallen zurück und aktivieren wieder die elektrische Selbsthaltung der Motorschütze K1:73-74, K2:73-74. Somit ist die Schaltung nicht mit dem Rückfall der mechanischen Selbsthaltekontakte für die jeweilige Richtung S12, S14 beendet, es wird vielmehr eine weitere Schaltung eingeleitet.After 30 switching step units, the pass-through protection contacts S1 or S2 fall back and the relay for automatic position sweep K37 drops off. The contact K37: 21-24 opens and interrupts self-holding of stepper contactor K20. The contacts K20: 21-22 or K20: 31-32 fall back and activate again the electrical latching of the motor contactors K1: 73-74, K2: 73-74. Thus, the circuit does not coincide with the relapse of the mechanical self-holding contacts for the respective direction S12, S14 ended, it is rather a further circuit initiated.

6...8 Schaltschritteinheiten nach Beginn der nächsten Schaltung fällt der Durchlaufkontakt S37:C-NC zurück. K20:A1-A2 wird aktiviert und die Schaltung wird normal beendet.6 ... 8 switching step units after the start of the next switching, the continuous contact S37 falls: C-NC back. K20: A1-A2 is activated and the circuit is terminated normally.

Claims (3)

  1. Motor drive for tap changers, changeover devices or plunger coils, with a load gear which comprises an electric drive motor and acts directly on the tap changer or the like, with a control gear, which comprises a cam disc having control cams, which in turn actuate mechanical cam switches and which rotate through 360 degrees on each switching consisting of n switching steps, with a motor control circuit, by means of which the terminals of the drive motor are connectible by way of a motor contactor to the current feed line in dependence on rotational direction and in which also a protective motor switch is connected, with a current control circuit containing a stepping relay, which is actuable by means of the cam switches in such a manner that the motor drive operates according to the principle of step switching, wherein the initiated switching is automatically and constrainedly led to the end, with a run-through protection device with two additional control cams on the cam disc, by which the two additional cam switches are actuable, characterised in that the two additional cam switches (S1, S2) are constructed as changeover contacts that the actuation of the two additional cam switches (S1, S2) takes place in one rotational direction of the drive motor in such a manner that the first cam switch (S1) is closed during the switching steps a ... b and the second cam switch (S2) is closed during the switching steps (a + x) ... (b + x), that the actuation of the two additional cam switches (S1, S2) in the other rotational direction of the drive motor takes place in such a manner that the first cam switch (S1) is closed during the switching steps (a + x) ... (b + x) and the second cam switch (S2) is closed during the switching steps a ... b, wherein each of a, b and x are natural numbers and a is smaller than b as well as x is smaller than a, and that first and second cam switches (S1, S2) are connected into the current control circuit in such a manner that the protective motor switch Q1 is triggered and thus the motor drive can be shut down if at one of the two instants of each switching over in which only one of the two cam switches (S1 or S2) is disposed in the closed state the motor contactor (K1, K2) and stepping relay (K20) are not disposed in the state intended for normal operation.
  2. Motor drive according to claim 1, characterised in that x is selected to be equal to 1 such that the actuation of the two cam switches (S1, S2) in the one rotational direction of the drive motor takes place in such a manner that the first cam switch (S1) is closed during the switching steps a ... b and the second cam switch (S2) is closed during the switching steps (a + 1) ... (b + 1) and that the actuation of the two cam switches (S1, S2) in the other rotational direction of the drive motor takes place in such a manner that the first cam switch (S1) is closed during the switching steps (a + 1) ... (b + 1) and the second cam switch (S2) is closed during the switching steps a ... b.
  3. Motor drive according to claim 1 or 2, characterised in that a further additional cam switch (S37) constructed as a break contact is provided, that triggers corresponding with the provided run-through settings of the motor drive and briefly actuating the further cam switch (S37) are provided and that the further cam switch (S37) is connected into the current control circuit in such a manner that on actuation thereof shortly before the end of the respective switching the stepping relay (K20) drops out and thus the motor drive executes a further switching in the corresponding rotational direction.
EP03755038A 2002-05-24 2003-03-13 Motor drive Expired - Lifetime EP1508196B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10222941A DE10222941C1 (en) 2002-05-24 2002-05-24 Motorized drive for electric stepping switch has additional cam switches operated by cam disc in control drive train for switching rotation direction of electric motor in load drive train
DE10222941 2002-05-24
PCT/EP2003/002579 WO2003100961A1 (en) 2002-05-24 2003-03-13 Motor drive

Publications (2)

Publication Number Publication Date
EP1508196A1 EP1508196A1 (en) 2005-02-23
EP1508196B1 true EP1508196B1 (en) 2005-10-12

Family

ID=28685344

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Application Number Title Priority Date Filing Date
EP03755038A Expired - Lifetime EP1508196B1 (en) 2002-05-24 2003-03-13 Motor drive

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EP (1) EP1508196B1 (en)
AT (1) ATE306744T1 (en)
AU (1) AU2003209731A1 (en)
DE (2) DE10222941C1 (en)
WO (1) WO2003100961A1 (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2947769A1 (en) * 1979-11-27 1981-07-23 Transformatoren Union Ag, 7000 Stuttgart Transformer tap changer drive control - has several rotationally independent tap changer switches, with single relay for both directions of rotation
DE4214431C3 (en) * 1992-04-30 1996-08-14 Reinhausen Maschf Scheubeck Step switch with motor drive
DE19707548C1 (en) * 1997-02-26 1998-06-18 Reinhausen Maschf Scheubeck Motorised drive e.g. for electric multiple-contact or stepping switch
DE19720617C2 (en) * 1997-05-16 1999-03-18 Reinhausen Maschf Scheubeck Position reporting arrangement for motor drives
DE19755758C1 (en) * 1997-12-16 1999-05-06 Reinhausen Maschf Scheubeck Switching arrangement for motor drive
SE519492C2 (en) * 2000-05-26 2003-03-04 Abb Ab Actuator and winding coupler including one

Also Published As

Publication number Publication date
AU2003209731A1 (en) 2003-12-12
EP1508196A1 (en) 2005-02-23
WO2003100961A1 (en) 2003-12-04
DE10222941C1 (en) 2003-10-30
DE50301374D1 (en) 2005-11-17
ATE306744T1 (en) 2005-10-15

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