EP1665306A1 - Load tap changer with motor drive - Google Patents

Load tap changer with motor drive

Info

Publication number
EP1665306A1
EP1665306A1 EP04764010A EP04764010A EP1665306A1 EP 1665306 A1 EP1665306 A1 EP 1665306A1 EP 04764010 A EP04764010 A EP 04764010A EP 04764010 A EP04764010 A EP 04764010A EP 1665306 A1 EP1665306 A1 EP 1665306A1
Authority
EP
European Patent Office
Prior art keywords
switch
motor
cam
selector
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.)
Granted
Application number
EP04764010A
Other languages
German (de)
French (fr)
Other versions
EP1665306B1 (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
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Maschinenfabrik Reinhausen GmbH, Maschinenfabrik Reinhausen Gebrueder Scheubeck GmbH and Co KG filed Critical Maschinenfabrik Reinhausen GmbH
Publication of EP1665306A1 publication Critical patent/EP1665306A1/en
Application granted granted Critical
Publication of EP1665306B1 publication Critical patent/EP1665306B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
    • H01H19/36—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand the operating part having only two operative positions, e.g. relatively displaced by 180 degrees
    • H01H19/38—Change-over switches
    • 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
    • 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
    • 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
    • H01H2009/0061—Monitoring tap change switching devices

Definitions

  • the invention relates to an on-load tap changer with a motor drive.
  • the applicable standards such as IEC 60214 and VDE 0532 stipulate that the motor drive has a direction of rotation monitoring and has means that ensure an automatic termination of a switchover in the direction once started. This requires information about the direction of rotation.
  • the known on-load tap-changer uses a rotating field control relay for monitoring the direction of rotation and a bistable relay (current surge relay) for automatically ending a changeover that has already started.
  • bistable relay current surge relay
  • the object of the invention is therefore to provide an on-load tap changer with a motor drive of the type mentioned in the introduction, in which the described safety requirements are implemented in a simple and inexpensive manner.
  • the on-load tap-changer has various new features which, in combination with one another, meet the safety requirements described.
  • the direction of rotation monitoring and the restart of the motor drive are essentially derived from existing messages. It is particularly advantageous that no additional mechanical components are required; Both the described field control relay and the bistable relay can be omitted without replacement.
  • inductive proximity sensors are provided on the diverter switch of the on-load tap changer, which detect its position. Furthermore, means for unlatching monitoring are arranged on the linkage between the motor drive and on-load tap changer, which have cam switches.
  • Means are also provided for the mechanical running signal of the motor drive; this is recorded directly on the selector drive using a direction-independent cam track. Finally, electrical means for reporting the running of the (known) motor contactors are provided.
  • Figure 1 shows the arrangement of the inductive proximity sensors
  • FIG. 2 shows the means for unlatching monitoring on the linkage between the motor drive and on-load tap-changer.
  • FIG. 3 shows the means for mechanical running signal on the selector drive
  • FIG. 4 shows a complete circuit diagram of the motor drive as part of the on-load tap-changer according to the invention
  • FIG. 5 shows a circuit extract with safety devices
  • FIG. 6 shows a schematic switching sequence when switching from one winding tap of the dry-type transformer to another (adjacent) winding tap.
  • FIG. 1 shows how the position of the diverter switch is detected by inductive proximity sensors S70, S71 on the diverter switch. An even / odd message is generated, which is multiplied by auxiliary contactors K13 and K14, which are explained below.
  • the diverter switch itself switches approximately 20 degrees before the end of a shift. In the entire exemplary embodiment, a total rotation angle of 360 degrees is assumed for each load switchover.
  • a cam track is provided on the linkage between the motor drive and the step switch, black in the figure, which is widened in one direction by 130 degrees, so that with it corresponding cam switches S23 or S24 - depending on the current position and controlled direction of rotation - 25 degrees Switch on or off at the beginning or before the end of a switchover.
  • FIG. 3 shows the means for mechanically reporting the running of the motor drive.
  • a directionally independent cam track is shown, which is arranged directly on the selector drive.
  • a cam switch S13 switches on 35 degrees after the start of the switchover and 35 degrees before the end of the switchover. The movement of the selector itself begins at an angle of rotation greater than 35 degrees.
  • FIG. 4 shows the circuit diagram according to the invention, which also has other known components which are necessary for explaining the overall function. The same applies to the actual monitoring unit shown in FIG. 5.
  • the diverter switch is in the odd position, S71 actuated, K14 energized and S23 actuated. After activating the motor contactor K2, the motor M1 starts running in the "right" direction. After 25 degrees, the cam switch for the unlatch monitoring has reached the position that it maintains during the entire checking phase (35 degrees ... 325 degrees). Starting from FIG. 2 In this case, the states do not change: S23 remains activated, S24 is not activated. The cam switch S13 (FIG. 3) is activated after 35 degrees and activates the checking and restart phase.
  • the diverter switch is in the odd position, S71 actuated, K14 energized and S23 actuated. After activating the motor contactor K1, the motor M1 starts running in the "left" direction. After 25 degrees, the cam switch for the unlatch monitoring has reached the position that it maintains during the entire checking phase (35 degrees ... 325 degrees). Starting from FIG. 2 S24 is actuated; S23 falls back. The cam switch S13 (FIG. 3) is actuated after 35 degrees and activates the checking and restarting phase.
  • the diverter switch is in the straight position, S70 actuated, K13 tightened and S24 actuated.
  • the motor M1 After activating the motor contactor K2, the motor M1 starts running in the "right" direction.
  • the cam switch for the unlatch monitoring After 25 degrees, the cam switch for the unlatch monitoring has reached the position that it maintains during the entire checking phase (35 degrees ... 325 degrees). Starting from FIG. 2 In this case, the states do not change: S24 remains activated, S23 is not activated.
  • the cam switch S13 (FIG. 3) is activated after 35 degrees and activates the checking and restart phase.
  • the diverter switch is in the straight position, S70 actuated, K13 tightened and S24 actuated. After activating the motor contactor K1, the motor M1 starts running in the "right" direction. After 25 degrees, the cam switch for the unlatch monitoring has reached the position that it maintains during the entire inspection phase (35 degrees ... 325 degrees). Starting from FIG. 2 S23 is actuated, S24 falls back, cam switch S13 (FIG. 3) is actuated after 35 degrees and activates the checking and restarting phase.
  • Errors in the monitoring and restarting device are automatically recognized as all contacts of the cam switches S23 and S24 are connected and trigger the motor protection switch Q1. If there is an error in the detection of the respective position of the diverter switch, either both monitoring circuits are electrically active or inactive; both trigger the motor protection switch Q1.

Landscapes

  • Train Traffic Observation, Control, And Security (AREA)
  • Control Of Electric Motors In General (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Power Steering Mechanism (AREA)
  • Motor And Converter Starters (AREA)
  • Control Of Stepping Motors (AREA)
  • Control Of Direct Current Motors (AREA)

Abstract

The load stepping switch has a selector for pre-selection of the new winding tap-off, the selector and the load switching device both operated via the motorized drive, which provides direct operation of the selector and tensioning of a force storage mechanism for subsequent operation of the load switching device. Inductive proximity switches (S70,S71) detect each position of the load switching device, with cam switches operated by cams attached to the motorized drive shaft, the signals from both switches compared for operation of a motor protection switch for the electric drive motor upon detection of an abnormality.

Description

Laststufenschalter mit MotorantriebOn-load tap-changers with motor drive
Die Erfindung betrifft einen Laststufenschalter mit einem Motorantrieb.The invention relates to an on-load tap changer with a motor drive.
Aus der Firmendruckschrift der Anmelderin „Laststufenschalter AVT-Betriebsanleitung; Druckimpressum BA 163/01 de, 0802/500, ist ein solcher Laststufenschalter für Innenanlagen bekannt, der zur Einstellung des Übersetzungsverhältnisses eines Trockentransformators unter Last dient. Dieser bekannte Laststufenschalter arbeitet nach dem Prinzip der Widerstands-Schnellschaltung. Er weist einen Wähler zur lastlosen Vorwahl der neuen Wickluπgsanzapfung, auf die umgeschaltet werden soll, sowie einen Lastumschalter zur eigentlichen nachfolgenden Umschaltung auf. Als lastumschaltende Kontakte werden Vakuumschaltzellen verwendet. Der elektrische Motorantrieb zur Betätigung des Schalters ist dabei in das Gehäuse des Laststufenschalters integriert.From the applicant's company publication “On-load tap-changer AVT operating instructions; Druckimpressum BA 163/01 de, 0802/500, such an on-load tap-changer for indoor systems is known, which is used to adjust the transmission ratio of a dry-type transformer under load. This well-known on-load tap-changer works on the principle of the high-resistance circuit. It has a selector for the no-load preselection of the new winding tap to which the switch is to be made, and a load switch for the actual subsequent switchover. Vacuum switch cells are used as load-switching contacts. The electric motor drive for actuating the switch is integrated in the on-load tap-changer housing.
Die geltenden Normen wie die IEC 60214 und VDE 0532 schreiben dabei vor, dass der Motorantrieb eine Drehrichtungsüberwachung besitzt und Mittel aufweist, die ein automatisches Beenden einer Umschaltung in der einmal begonnenen Richtung gewährleisten. Dies setzt eine Drehrichtungsinformation voraus. Um diese Anforderungen zu gewährleisten, wird beim bekannten Laststufenschalter ein Drehfeldkontrollrelais zur Drehrichtungsüberwachung und ein bistabiles Relais (Stromstossrelais) zum automatischen Beenden einer einmal begonnenen Umschaltung eingesetzt. Diese elektronischen Komponenten sind jedoch zum einen teuer und zum anderen bei rauen Umgebungsverhältnissen problematisch.The applicable standards such as IEC 60214 and VDE 0532 stipulate that the motor drive has a direction of rotation monitoring and has means that ensure an automatic termination of a switchover in the direction once started. This requires information about the direction of rotation. In order to ensure these requirements, the known on-load tap-changer uses a rotating field control relay for monitoring the direction of rotation and a bistable relay (current surge relay) for automatically ending a changeover that has already started. On the one hand, these electronic components are expensive and, on the other hand, they are problematic in harsh environmental conditions.
Aufgabe der Erfindung ist es demnach, einen Laststufenschalter mit Motorantrieb der eingangs genannten Art anzugeben, bei dem auf einfache und kostengünstige Weise die beschriebenen Sicherheitsanforderungen realisiert sind.The object of the invention is therefore to provide an on-load tap changer with a motor drive of the type mentioned in the introduction, in which the described safety requirements are implemented in a simple and inexpensive manner.
Diese Aufgabe wird durch einen Laststufenschalter mit den Merkmalen des Patentanspruches gelöst.This object is achieved by an on-load tap changer with the features of the patent claim.
Bei der Erfindung weist der Laststufenschalter verschiedene neue Merkmale auf, die in Kombination miteinander die beschriebenen Sicherheitsanforderungen erfüllen. Dabei werden die Drehrichtungsüberwachung und der Wiederanlauf des Motorantriebes aus im Wesentlichen bereits vorhandenen Meldungen abgeleitet. Besonders vorteilhaft ist, dass keine zusätzlichen mechanischen Komponenten mehr benötigt werden; sowohl das beschriebene Drehfeldkontrollrelais als auch das bistabile Relais können ersatzlos entfallen.In the invention, the on-load tap-changer has various new features which, in combination with one another, meet the safety requirements described. The direction of rotation monitoring and the restart of the motor drive are essentially derived from existing messages. It is particularly advantageous that no additional mechanical components are required; Both the described field control relay and the bistable relay can be omitted without replacement.
Um dies zu erreichen, sind folgende Merkmale vorgesehen:To achieve this, the following features are provided:
Zunächst einmal sind induktive Näherungssensoren am Lastumschalter des Laststufenschalters vorgesehen, die dessen Position erfassen. Weiterhin sind Mittel zur Entklinkungsüberwachung am Gestänge zwischen Motorantrieb und Laststufenschalter angeordnet, die Nockenschalter aufweisen.First of all, inductive proximity sensors are provided on the diverter switch of the on-load tap changer, which detect its position. Furthermore, means for unlatching monitoring are arranged on the linkage between the motor drive and on-load tap changer, which have cam switches.
Weiterhin sind Mittel zur mechanischen Laufmeldung des Motorantriebes vorgesehen; diese wird mittels einer richtungsunabhängigen Nockenbahn direkt am Wählerantrieb erfasst. Schließlich sind elektrische Mittel zur Laufmeldung der (bekannten) Motorschütze vorgesehen.Means are also provided for the mechanical running signal of the motor drive; this is recorded directly on the selector drive using a direction-independent cam track. Finally, electrical means for reporting the running of the (known) motor contactors are provided.
Die Erfindung soll nachfolgend beispielhaft noch näher erläutert werden.The invention will be explained in more detail below by way of example.
Es zeigen:Show it:
Figur 1 die Anordnung der induktiven NäherungssensorenFigure 1 shows the arrangement of the inductive proximity sensors
Figur 2 die Mittel zur Entklinkungsüberwachung am Gestänge zwischen Motorantrieb und Laststufenschalter Figur 3 die Mittel zur mechanischen Laufmeldung am Wählerantrieb2 shows the means for unlatching monitoring on the linkage between the motor drive and on-load tap-changer. FIG. 3 shows the means for mechanical running signal on the selector drive
Figur 4 ein vollständiges Schaltbild des Motorantriebes als Bestandteil des erfindungsgemäßen Laststufenschalters Figur 5 einen Schaltungsauszug mit Sicherheitseinrichtungen4 shows a complete circuit diagram of the motor drive as part of the on-load tap-changer according to the invention, FIG. 5 shows a circuit extract with safety devices
Figur 6 einen schematischen Schaltablauf bei der Umschaltung von einer Wicklungsanzapfung des Trockentransformators zu einer (benachbarten) anderen Wicklungsanzapfung.FIG. 6 shows a schematic switching sequence when switching from one winding tap of the dry-type transformer to another (adjacent) winding tap.
In Figur 1 ist gezeigt, wie die Position des Lastumschalters über induktive Näherungssensoren S70, S71 am Lastumschalter erfasst wird. Dabei wird eine Gerade/Ungerade-Meldung erzeugt, die über weiter unten noch erläuterte Hilfsschütze K13 und K14 vervielfacht wird. Der Lastumschalter selbst schaltet ca. 20 Grad vor dem Ende einer Schaltung. Dabei wird im gesamten Ausführungsbeispiel auf einen gesamten Drehwinkel bei jeder Lastumschaltung von 360 Grad ausgegangen.FIG. 1 shows how the position of the diverter switch is detected by inductive proximity sensors S70, S71 on the diverter switch. An even / odd message is generated, which is multiplied by auxiliary contactors K13 and K14, which are explained below. The diverter switch itself switches approximately 20 degrees before the end of a shift. In the entire exemplary embodiment, a total rotation angle of 360 degrees is assumed for each load switchover.
In Figur 2 sind die Mittel zur Entklinkungsüberwachung im Detail dargestellt. Dafür ist am Gestänge zwischen Motorantrieb und Stufenschalter eine Nockenbahn vorgesehen, in der Figur schwarz ausgeführt, die in eine Richtung um 130 Grad verbreitert ist, so dass mit ihr korrespondierende Nockenschalter S23 bzw. S24 - je nach aktueller Stellung und angesteuerter Laufrichtung - 25 Grad nach Beginn bzw. vor Ende einer Umschaltung auf - bzw. abschalten.The means for unlatching monitoring are shown in detail in FIG. For this purpose, a cam track is provided on the linkage between the motor drive and the step switch, black in the figure, which is widened in one direction by 130 degrees, so that with it corresponding cam switches S23 or S24 - depending on the current position and controlled direction of rotation - 25 degrees Switch on or off at the beginning or before the end of a switchover.
In Figur 3 sind die Mittel zur mechanischen Laufmeldung des Motorantriebes gezeigt. Es ist eine richtungsunabhängig wirkende Nockenbahn dargestellt, die direkt am Wählerantrieb angeordnet ist. Ein Nockenschalter S13 schaltet hierbei 35 Grad nach dem Beginn der Umschaltung auf und 35 Grad vor Ende der Umschaltung wieder ab. Die Bewegung des Wählers selbst beginnt erst bei einem Drehwinkel größer 35 Grad.FIG. 3 shows the means for mechanically reporting the running of the motor drive. A directionally independent cam track is shown, which is arranged directly on the selector drive. A cam switch S13 switches on 35 degrees after the start of the switchover and 35 degrees before the end of the switchover. The movement of the selector itself begins at an angle of rotation greater than 35 degrees.
In Figur 4 ist das Schaltbild gemäß der Erfindung gezeigt, das darüber hinaus auch andere, bekannte, aber für die Erläuterung der Gesamtfunktion notwendige Bestandteile aufweist. Das Gleiche gilt für die in Figur 5 dargestellte eigentliche Überwachungseinheit. In diesen beiden Darstellungen bedeuten: F2 Lichtbogenüberwachungseinheit H1 SignallampeFIG. 4 shows the circuit diagram according to the invention, which also has other known components which are necessary for explaining the overall function. The same applies to the actual monitoring unit shown in FIG. 5. In these two representations, mean: F2 arc monitoring unit H1 signal lamp
K1 MotorschützK1 motor contactor
K2 MotorschützK2 motor contactor
K13 Hilfsschütz des Näherungssensors S70K13 auxiliary contactor of the S70 proximity sensor
K14 Hilfsschütz des Näherungssensors S71K14 auxiliary contactor of the proximity sensor S71
K20 SchrittschaltrelaisK20 step relay
K29 ZeitrelaisK29 timing relay
M1 MotorM1 engine
Q1 MotorschutzschalterQ1 motor protection switch
53 Höher/Tiefer-Schaiter53 Higher / Lower Schaiter
54 Begrenzungsschalter für K154 Limit switch for K1
55 Begrenzungsschalter für K2 S8 A und B: Sicherheitsschalter S13 Nockenschalter55 Limit switch for K2 S8 A and B: Safety switch S13 cam switch
523 Nockenschalter523 cam switch
524 Nockenschalter524 cam switch
S38 PotentiometerkontaktS38 potentiometer contact
570 Näherungssensor570 proximity sensor
571 Näherungssensor X... Terminals.571 Proximity sensor X ... terminals.
Nachfolgend soll die Funktionsweise des erfindungsgemäßen Laststufenschalters mit Motorantrieb, speziell dessen Sicherheitseinrichtung zur Erfüllung der in der Beschreibungseinleitung genannten technischen Forderungen, noch einmal im Zusammenhang erläutert werden. Nach der Ansteuerung eines der Motorschütze K1 oder K2 läuft Motor M1 des Motorantriebes an. Nach 25 Grad wechseln die Nockenschalter S23/S24 ihre Position (s. Figur 2). 35 Grad nach Beginn der Schaltung schaltet der weitere Nockenschalter S13 die Wiederanlaufeinrichtung bzw. die Drehrichtungsüberwachung aktiv (s. Figur 3). Während der Nockenschalter S13 aktiv ist, wechseln weder der Lastumschalter und damit die induktiven Näherungssensoren S70/S71 sowie deren Hilfsschütze K13/K14 (s. Figur 1) zur Vervielfachung der Meldung, noch die Nockenschalter S23, S24 der Entklinkungsüberwachung (s. Figur 2) ihre Position. Während dieser Zeit werden folgende Betriebszustände abgefragt:The mode of operation of the on-load tap-changer according to the invention with motor drive, in particular its safety device for fulfilling the technical requirements mentioned in the introduction to the description, is to be explained once again in connection below. After activating one of the motor contactors K1 or K2, motor M1 of the motor drive starts up. After 25 degrees, the cam switches S23 / S24 change their position (see Figure 2). 35 degrees after the start of the shift, the further cam switch S13 activates the restart device or the direction of rotation monitoring (see FIG. 3). While the cam switch S13 is active, neither the diverter switch and thus the inductive proximity sensors S70 / S71 and their auxiliary contactors K13 / K14 (see Figure 1) change to multiply the message, nor the cam switches S23, S24 of the release monitoring (see Figure 2) your position. The following operating states are queried during this time:
Lastumschalterposition gerade (K13 aktiv, K14 inaktiv) Laufrichtung rechts (K2 aktiv, K1 inaktiv, S24 aktiv, S23 inaktiv)Diverter switch position straight (K13 active, K14 inactive) Running direction right (K2 active, K1 inactive, S24 active, S23 inactive)
Lastumschalterposition gerade (K13 aktiv, K14 inaktiv) Laufrichtung links (K1 aktiv, K2 inaktiv, S23 aktiv, S24 inaktiv)Diverter switch position straight (K13 active, K14 inactive) Direction left (K1 active, K2 inactive, S23 active, S24 inactive)
Lastumschalterposition ungerade (K14 aktiv, K13 inaktiv) Laufrichtung rechts (K2 aktiv, K1 inaktiv, S23 aktiv, S24 inaktiv)Diverter switch position odd (K14 active, K13 inactive) Running direction right (K2 active, K1 inactive, S23 active, S24 inactive)
Lastumschalterposition ungerade (K14 aktiv, K13 inaktiv) Laufrichtung links (K1 aktiv, K2 inaktiv, S24 aktiv, S23 inaktiv).Diverter switch position odd (K14 active, K13 inactive) running direction left (K1 active, K2 inactive, S24 active, S23 inactive).
Damit sind nach den Regeln der Permutation alle möglichen Betriebszustände, von denen jeweils einer vorliegt, abfragbar. Die Abfrage selbst erfolgt durch die elektrische Verschaltung der eben erwähnten Meldekontakte. Sie wirken direkt auf den Motorschutzschalter Q1 (Drehrichtungsüberwachung) bzw. die Motorschütze K1 , K2 (Wiederanlaufeinrichtung).This means that all possible operating states, one of which is present, can be queried according to the rules of permutation. The query itself takes place through the electrical connection of the signaling contacts just mentioned. They act directly on the motor protection switch Q1 (direction of rotation monitoring) or the motor contactors K1, K2 (restart device).
Nachfolgend sollen die Schaltabläufe an Hand des in Figur 4 gezeigten Schaltbildes noch einmal detailliert erläutert werden. Die Steuerung selbst funktioniert dabei nach dem Prinzip der Schrittschaltung und erfüllt die Anforderungen der IEC 60214. Die beiden Motorschütze K1, K2 steuern den Motor in jeweils unterschiedliche Drehrichtung an, der Motorschutzschalter Q1 schützt diesen Motor vor Überlastung und verfügt über eine Auslösespule zur Abschaltung. Alle nachfolgend verwendeten Gradangaben beziehen sich wiederum auf einen vollständigen Drehwinkel von 360 Grad je Umschaltung.In the following, the switching sequences are to be explained again in detail on the basis of the circuit diagram shown in FIG. The control itself works according to the principle of step switching and fulfills the requirements of IEC 60214. The two motor contactors K1, K2 control the motor in different directions of rotation, the motor protection switch Q1 protects this motor against overload and has a release coil for switching off. All degrees used below refer to a complete rotation angle of 360 degrees per switch.
a) Lastumschalterposition ungerade, Ansteuerung rechtsa) Diverter switch position odd, control on the right
Der Lastumschalter steht in Position ungerade, S71 betätigt, K14 angezogen und S23 betätigt. Nach Ansteuerung des Motorschützes K2 läuft der Motor M1 in Laufrichtung „rechts" an. Nach 25 Grad hat der Nockenschalter für die Entklinkungsüberwachung die Position erreicht, die er in der gesamten Überprüfungsphase (35 Grad...325 Grad) behält. Ausgehend von Figur 2 ändern sich in diesem Fall die Zustände nicht; S23 bleibt betätigt, S24 nicht betätigt. Der Nockenschalter S13 (Figur 3) wird nach 35 Grad betätigt und aktiviert die Überprüfungs- und Wiederanlaufphase.The diverter switch is in the odd position, S71 actuated, K14 energized and S23 actuated. After activating the motor contactor K2, the motor M1 starts running in the "right" direction. After 25 degrees, the cam switch for the unlatch monitoring has reached the position that it maintains during the entire checking phase (35 degrees ... 325 degrees). Starting from FIG. 2 In this case, the states do not change: S23 remains activated, S24 is not activated. The cam switch S13 (FIG. 3) is activated after 35 degrees and activates the checking and restart phase.
Über den Nockenschalter S13 (aktiviert), den Öffner des Hilfsschütz K13 (nicht aktiviert) zur Vervielfältigung der Positionsmeldung des Lastumschalters, wird am Nockenschalter S24 (nicht aktiviert) Spannung angelegt. Ist auf Grund der richtigen Drehrichtung S24 nicht aktiviert, wird Spannung an die Spule des Motorschützes für Laufrichtung „rechts" K2 gelegt; der Wiederanlauf ist bis zum Abfallen des Nockenschalters S13 gewährleistet. Ist S24, z. B. auf Grund eines falschen Drehfeldes an den Anschlussklemmen, aktiviert, wird mit Aufschalten des Nockenschalters S13 der Motorschutzschalter Q1 über den Hilfskontakt des Motorschützes K2:53-54 ausgelöst.Voltage is applied to the cam switch S24 (not activated) via the cam switch S13 (activated), the break contact of the auxiliary contactor K13 (not activated) to reproduce the position signal of the diverter switch. If S24 is not activated due to the correct direction of rotation, voltage is applied to the coil of the motor contactor for the "right" direction of rotation K2; restarting is ensured until cam switch S13 drops out. If S24, e.g. due to an incorrect rotating field, is applied to the Connection terminals, activated, trigger the motor protection switch Q1 via the auxiliary contact of the motor contactor K2: 53-54 when the cam switch S13 is switched on.
b) Lastumschalterposition ungerade, Ansteuerung linksb) Diverter switch position odd, control left
Der Lastumschalter steht in Position ungerade, S71 betätigt, K14 angezogen und S23 betätigt. Nach Ansteuerung des Motorschützes K1 läuft der Motor M1 in Laufrichtung „links" an. Nach 25 Grad hat der Nockenschalter für die Entklinkungsüberwachung die Position erreicht, die er in der gesamten Überprüfungsphase (35 Grad...325 Grad) behält. Ausgehend von Figur 2 wird S24 betätigt; S23 fällt zurück. Der Nockenschalter S13 (Figur 3) wird nach 35 Grad betätigt und aktiviert die Überprüfungsund Wiederanlaufphase.The diverter switch is in the odd position, S71 actuated, K14 energized and S23 actuated. After activating the motor contactor K1, the motor M1 starts running in the "left" direction. After 25 degrees, the cam switch for the unlatch monitoring has reached the position that it maintains during the entire checking phase (35 degrees ... 325 degrees). Starting from FIG. 2 S24 is actuated; S23 falls back. The cam switch S13 (FIG. 3) is actuated after 35 degrees and activates the checking and restarting phase.
Über den Nockenschalter S13 (aktiviert), den Öffner des Hilfsschütz K13 (nicht aktiviert) zur Vervielfältigung der Positionsmeldung des Lastumschalters, wird am Nockenschalter S24 (aktiviert) Spannung angelegt. Ist auf Grund der richtigen Drehrichtung S24 aktiviert, wird Spannung an die Spule des Motorschützes für Laufrichtung „links" K1 gelegt; der Wiederanlauf ist bis zum Abfallen des Nockenschalters S13 gewährleistet. Ist S24, z. B. auf Grund eines falschen Drehfeldes an den Anschlussklemmen, nicht aktiviert, wird mit Aufschalten des Nockenschalters S13 der Motorschutzschalter Q1 über den Hilfskontakt des Motorschützes K1:53-54 ausgelöst.Voltage is applied to the cam switch S24 (activated) via the cam switch S13 (activated), the break contact of the auxiliary contactor K13 (not activated) to reproduce the position signal of the diverter switch. If S24 is activated due to the correct direction of rotation, voltage is applied to the coil of the motor contactor for the "left" direction of rotation K1; restarting is guaranteed until cam switch S13 drops out. Is S24, e.g. due to an incorrect rotating field at the connection terminals , not activated, motor cam switch Q1 is triggered by activating cam switch S13 via the auxiliary contact of motor contactor K1: 53-54.
c) Lastumschalterposition gerade, Ansteuerung rechtsc) Diverter switch position straight, actuation on the right
Der Lastumschalter steht in Position gerade, S70 betätigt, K13 angezogen und S24 betätigt. Nach Ansteuerung des Motorschützes K2 läuft der Motor M1 in Laufrichtung „rechts" an. Nach 25 Grad hat der Nockenschalter für die Entklinkungsüberwachung die Position erreicht, die er in der gesamten Überprüfungsphase (35 Grad...325 Grad) behält. Ausgehend von Figur 2 ändern sich in diesem Fall die Zustände nicht; S24 bleibt betätigt, S23 nicht betätigt. Der Nockenschalter S13 (Figur 3) wird nach 35 Grad betätigt und aktiviert die Überprüfungs- und Wiederanlaufphase.The diverter switch is in the straight position, S70 actuated, K13 tightened and S24 actuated. After activating the motor contactor K2, the motor M1 starts running in the "right" direction. After 25 degrees, the cam switch for the unlatch monitoring has reached the position that it maintains during the entire checking phase (35 degrees ... 325 degrees). Starting from FIG. 2 In this case, the states do not change: S24 remains activated, S23 is not activated. The cam switch S13 (FIG. 3) is activated after 35 degrees and activates the checking and restart phase.
Über den Nockenschalter S13 (aktiviert), den Öffner des Hilfsschütz K14 (nicht aktiviert) zur Vervielfältigung der Positionsmeldung des Lastumschalters, wird am Nockenschalter S23 (aktiviert) Spannung angelegt. Ist auf Grund der richtigen Drehrichtung S23 nicht aktiviert, wird Spannung an die Spule des Motorschützes für Laufrichtung „links" K2 gelegt; der Wiederanlauf ist bis zum Abfallen des Nockenschalters S13 gewährleistet. Ist S23, z. B. auf Grund eines falschen Drehfeldes an den Anschlussklemmen, aktiviert, wird mit Aufschalten des Nockenschalters S13 der Motorschutzschalter Q1 über den Hilfskontakt des Motorschützes K2:53-54 ausgelöst.Voltage is applied to the cam switch S23 (activated) via the cam switch S13 (activated), the break contact of the auxiliary contactor K14 (not activated) to reproduce the position signal of the diverter switch. If S23 is not activated due to the correct direction of rotation, voltage is applied to the coil of the motor contactor for the "left" direction of rotation K2; restarting is ensured until the cam switch S13 drops out. If S23, e.g. due to an incorrect rotating field, on the Connection terminals, activated, trigger the motor protection switch Q1 via the auxiliary contact of the motor contactor K2: 53-54 when the cam switch S13 is switched on.
d) Lastumschalterposition gerade, Ansteuerung linksd) Diverter switch position straight, actuation on the left
Der Lastumschalter steht in Position gerade, S70 betätigt, K13 angezogen und S24 betätigt. Nach Ansteuerung des Motorschützes K1 läuft der Motor M1 in Laufrichtung „rechts" an. Nach 25 Grad hat der Nockenschalter für die Entklinkungsüberwachung die Position erreicht, die er in der gesamten Überprüfungsphase (35 Grad...325 Grad) behält. Ausgehend von Figur 2 wird S23 betätigt, S24 fällt zurück. Der Nockenschalter S13 (Figur 3) wird nach 35 Grad betätigt und aktiviert die Überprüfungsund Wiederanlaufphase.The diverter switch is in the straight position, S70 actuated, K13 tightened and S24 actuated. After activating the motor contactor K1, the motor M1 starts running in the "right" direction. After 25 degrees, the cam switch for the unlatch monitoring has reached the position that it maintains during the entire inspection phase (35 degrees ... 325 degrees). Starting from FIG. 2 S23 is actuated, S24 falls back, cam switch S13 (FIG. 3) is actuated after 35 degrees and activates the checking and restarting phase.
Über den Nockenschalter S13 (aktiviert), den Öffner des Hilfsschütz K14 (nicht aktiviert) zur Vervielfältigung der Positionsmeldung des Lastumschalters, wird am Nockenschalter S23 (aktiviert) Spannung angelegt. Ist auf Grund der richtigen Drehrichtung S23 aktiviert, wird Spannung an die Spule des Motorschützes für die Laufrichtung „links" K1 gelegt; der Wiederanlauf ist bis zum Abfallen des Nockenschalters S13 gewährleistet. Ist S23, z. B. auf Grund eines falschen Drehfeldes an den Anschlussklemmen, nicht aktiviert, wird mit Aufschalten des Nockenschalters S13 der Motorschutzschalter Q1 über den Hilfskontakt des Motorschützes K1 :53-54 ausgelöst.Voltage is applied to the cam switch S23 (activated) via the cam switch S13 (activated), the break contact of the auxiliary contactor K14 (not activated) to reproduce the position signal of the diverter switch. If S23 is activated due to the correct direction of rotation, voltage is applied to the coil of the motor contactor for the "left" direction of rotation K1; restarting is ensured until cam switch S13 drops out. If S23, for example due to an incorrect rotating field, on the Connection terminals, not activated, trigger the motor protection switch Q1 via the auxiliary contact of the motor contactor K1: 53-54 when the cam switch S13 is switched on.
Fehler in der Überwachungs- und Wiederanlaufeinrichtung werden, da alle Kontakte der Nockenschalter S23 und S24 angeschlossen sind, automatisch erkannt und führen zu einer Auslösung des Motorschutzschalters Q1. Liegt ein Fehler in der Erkennung der jeweiligen Position des Lastumschalters vor, sind entweder beide Überwachungskreise elektrisch aktiv oder inaktiv; beides führt zu einer Auslösung des Motorschutzschalters Q1. Errors in the monitoring and restarting device are automatically recognized as all contacts of the cam switches S23 and S24 are connected and trigger the motor protection switch Q1. If there is an error in the detection of the respective position of the diverter switch, either both monitoring circuits are electrically active or inactive; both trigger the motor protection switch Q1.

Claims

Patentanspruchclaim
Laststufenschalter mit einem Motorantrieb zur unterbrechungslosen Umschaltung unter Last zwischen verschiedenen Wicklungsanzapfungen eines Stufentransformators, wobei ein Wähler zur lastlosen Vorwahl der neuen Wicklungsanzapfung und ein Lastumschalter zur eigentlichen Umschaltung unter Last auf diese vorgesehen sind, wobei Wähler und Lastumschalter gemeinsam von einem Gestänge des Motorantriebes betätigt werden, derart, dass der Motorantrieb einerseits einen Wählerantrieb des Wählers betätigt und andererseits einen Kraftspeicher zur nachfolgenden Betätigung des Lastumschalters aufzieht, wobei der Motorantrieb einen elektrischen Motor aufweist, der drehrichtungsabhängig jeweils mittels eines Motorschützes betätigbar ist und in dessen Stromkreis ein Motorschutzrelais vorgesehen ist, dadurch gekennzeichnet, dass am Lastumschalter induktive Näherungssensoren (S70, S71), die die jeweilige Position desOn-load tap-changers with a motor drive for uninterrupted switching under load between different winding taps of a step transformer, a selector for load-free preselection of the new winding tap and a diverter switch for actually switching over under load are provided, the selector and diverter switch being actuated together by a linkage of the motor drive, In such a way that the motor drive actuates a selector drive of the selector on the one hand and on the other hand pulls up an energy store for subsequent actuation of the diverter switch, the motor drive having an electric motor which can be actuated by means of a motor contactor depending on the direction of rotation and in whose circuit a motor protection relay is provided, characterized in that that on the diverter switch inductive proximity sensors (S70, S71), which the respective position of the
Lastumschalters erfassen, vorgesehen sind, dass am Gestänge eine drehrichtungsabhängig wirkende Nockenbahn und zwei mit dieser korrespondierende Nockenschalter (S23, S24) vorgesehen sind, dass direkt am Wählerantrieb eine drehrichtungsunabhängig wirkende weitere Nockenbahn vorgesehen ist, die mit einem weiteren Nockenschalter (S13) korrespondiert und dass elektrische Mittel zum Vergleich der jeweils erfassten aktuellen Schaltstellung derDetect the diverter switch, it is provided that a cam track acting on the linkage and two cam switches (S23, S24) corresponding to it are provided on the linkage, that another cam track acting independently of the direction of rotation is provided directly on the selector drive, which corresponds to a further cam switch (S13) and that electrical means for comparing the respectively detected current switching position of the
Näherungssensoren (S70, S71), der Nockenschalter (S23, S24) sowie des weiteren NockenschaltersProximity sensors (S70, S71), the cam switch (S23, S24) and the other cam switch
(13) mit deren Normalzuständen bei jeder Betätigung des Laststufenschalters vorgesehen sind, derart, dass bei Abweichung mindestens eines dieser Schaltzustände vom Normalzustand der(13) are provided with their normal states each time the on-load tap-changer is actuated, such that if at least one of these switching states deviates from the normal state of the
Motorschutzschalter (Q1) betätigbar ist. Motor protection switch (Q1) can be actuated.
EP04764010A 2003-09-24 2004-08-12 Load tap changer with motor drive Not-in-force EP1665306B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10344142A DE10344142B3 (en) 2003-09-24 2003-09-24 Motorized load stepping switch for transformer using comparison of position signals from proximity switches and cam switches for operation of protection switch for electric drive motor
PCT/EP2004/009006 WO2005041230A1 (en) 2003-09-24 2004-08-12 Load tap changer with motor drive

Publications (2)

Publication Number Publication Date
EP1665306A1 true EP1665306A1 (en) 2006-06-07
EP1665306B1 EP1665306B1 (en) 2007-11-07

Family

ID=34042281

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04764010A Not-in-force EP1665306B1 (en) 2003-09-24 2004-08-12 Load tap changer with motor drive

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EP (1) EP1665306B1 (en)
KR (1) KR20070083239A (en)
CN (1) CN100466128C (en)
AT (1) ATE377835T1 (en)
DE (2) DE10344142B3 (en)
HK (1) HK1091672A1 (en)
WO (1) WO2005041230A1 (en)

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KR100905525B1 (en) * 2007-08-03 2009-07-01 주식회사 비엠일렉텍 Cam contactor for automatic tap converting in accordance with commercial voltage fluctuation and charger comprising the same
DE102011118488A1 (en) * 2011-11-11 2013-05-16 Maschinenfabrik Reinhausen Gmbh Motor drive for tap changer
DE102012103736A1 (en) * 2012-04-27 2013-10-31 Maschinenfabrik Reinhausen Gmbh Method for monitoring the operation of a tap changer
KR101525595B1 (en) * 2015-03-09 2015-06-03 성진전력 주식회사 Apparatus and method for controlling of on load tap changer
KR102459022B1 (en) * 2020-07-20 2022-10-26 주식회사 원프레딕트 Method for failure detection of OLTC(on load tab changer) and apparatus for performing the same
KR102219309B1 (en) 2020-11-13 2021-02-24 한국에너지솔루션 주식회사 Transformer Using Electric Power Distribution Smart OLTC

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DE502004005453D1 (en) 2007-12-20
HK1091672A1 (en) 2007-01-26
KR20070083239A (en) 2007-08-24
EP1665306B1 (en) 2007-11-07
CN1706015A (en) 2005-12-07
DE10344142B3 (en) 2005-02-10
ATE377835T1 (en) 2007-11-15
CN100466128C (en) 2009-03-04
WO2005041230A1 (en) 2005-05-06

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