EP1665306B1 - Load tap changer with motor drive - Google Patents

Load tap changer with motor drive Download PDF

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Publication number
EP1665306B1
EP1665306B1 EP04764010A EP04764010A EP1665306B1 EP 1665306 B1 EP1665306 B1 EP 1665306B1 EP 04764010 A EP04764010 A EP 04764010A EP 04764010 A EP04764010 A EP 04764010A EP 1665306 B1 EP1665306 B1 EP 1665306B1
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EP
European Patent Office
Prior art keywords
switch
motor
cam
tap
diverter switch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP04764010A
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German (de)
French (fr)
Other versions
EP1665306A1 (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 EP1665306A1 publication Critical patent/EP1665306A1/en
Application granted granted Critical
Publication of EP1665306B1 publication Critical patent/EP1665306B1/en
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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 stipulate that the motor drive has rotation monitoring and has means to ensure automatic termination of a changeover in the direction it has started. This requires a direction of rotation information.
  • a rotating field control relay for monitoring the direction of rotation and a bistable relay (surge relay) is used for automatic termination of a once started switching.
  • these electronic components are expensive on the one hand and problematic on the other in harsh environmental conditions.
  • the object of the invention is therefore to provide an on-load tap-changer with motor drive of the type mentioned, in which the described safety requirements are realized in a simple and cost-effective manner.
  • the on-load tap-changer has various novel features which, in combination with each other, meet the described requirements of Slayerhelts.
  • the direction of rotation monitoring and the restart of the motor drive are derived from essentially existing messages. It is particularly advantageous that no additional mechanical components are needed anymore; Both the described rotating field control relay and the bistable relay can be omitted without replacement.
  • inductive proximity sensors are provided on the load changeover switch of the on-load tap-changer, which detect its position.
  • means for EntklinkungsGermanwachung are arranged on the linkage between the motor drive and on-load tap changer having cam switches. Furthermore, means for mechanical running message of the motor drive are provided; This is detected by means of a direction-independent cam track directly on the selector drive. Finally, electrical means for running message of the (known) motor contactors are provided.
  • FIG. 1 shows how the position of the diverter switch is detected by inductive proximity sensors S70, S71 on the diverter switch. In this case, an even / odd message is generated, which is multiplied by auxiliary contactors K13 and K14, which are explained below.
  • the diverter switch itself switches about 20 degrees before the end of a circuit. It is assumed in the entire embodiment on a total rotation angle at each load switching of 360 degrees.
  • FIG 3 the means for mechanical running message of the motor drive are shown. It is a direction-independent acting cam track shown, which is located directly on the selector drive.
  • a cam switch S13 switches off 35 degrees after the start of the switchover and 35 degrees before the end of the switch again. The movement of the selector itself begins only at a rotation angle greater than 35 degrees.
  • the control itself operates on the principle of stepping and meets 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 from overload and has a trip coil for shutdown. All degrees used below refer in turn to a complete rotation angle of 360 degrees per switching.
  • the diverter switch is in odd position, S71 actuated, K14 energized and S23 actuated. After activating the motor contactor K2, the motor M1 starts in the direction "right". After 25 degrees, the unlatching monitoring cam switch has reached the position it retains throughout the test phase (35 degrees ... 325 degrees). Starting from Figure 2, the states do not change in this case; S23 remains actuated, S24 not actuated.
  • the cam switch S13 ( Figure 3) is operated at 35 degrees and activates the check and restart phases.
  • the diverter switch is in odd position, S71 actuated, K14 energized and S23 actuated. After activating the motor contactor K1, the motor M1 starts in the direction "left". After 25 degrees, the unlatching monitoring cam switch has reached the position it retains throughout the test phase (35 degrees ... 325 degrees). Starting from FIG. 2, S24 is actuated; S23 drops back. The cam switch S13 ( Figure 3) is operated at 35 degrees and activates the check and restart phases.
  • the diverter switch is in the straight position, S70 actuated, K13 energized and S24 actuated.
  • the motor M1 After activating the motor contactor K2, the motor M1 starts in the direction "right".
  • the unlatching monitoring cam switch has reached the position it retains throughout the test phase (35 degrees ... 325 degrees).
  • the states do not change in this case; S24 remains actuated, S23 not actuated.
  • the cam switch S13 ( Figure 3) is operated at 35 degrees and activates the check and restart phases.
  • the NC contactor K14 opener (not activated) for multiplying the position signal of the diverter switch, voltage is applied to the cam switch S23 (activated). If, due to the correct direction of rotation S23 is not activated, voltage is applied to the coil of the motor contactor for direction "left" K2; the restart is guaranteed until the cam switch S13 drops out. Is S23, z. If, for example, due to a wrong rotating field at the connection terminals, the motor protection switch Q1 is triggered by connecting the cam switch S13 via the auxiliary contact of the motor contactor K2: 53-54.
  • the diverter switch is in the straight position, S70 actuated, K13 energized and S24 actuated. After activating the motor contactor K1, the motor M1 starts in the direction "right”. After 25 degrees, the unlatching monitoring cam switch has reached the position it retains throughout the test phase (35 degrees ... 325 degrees). Starting from FIG. 2, S23 is actuated, S24 drops back.
  • the cam switch S13 ( Figure 3) is operated at 35 degrees and activates the check and restart phases.

Landscapes

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

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, 08021500, 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 lastiosen Vorwahl der neuen Wicklungsanzapfung, 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 company publication of the applicant "On-load tap-changer AVT operating instructions, pressure imprint BA 163/01 de, 08021500, such an on-load tap-changer for indoor installations is known, which serves to set the transmission ratio of a dry-type transformer under load.This known on-load tap-changer operates according to the principle of resistance high-speed switching It has a selector for last-load preselection of the new winding tap to be switched to, and a diverter switch for actual subsequent changeover.

Ein weiterer Laststufenschalter mit Motorantrieb ist aus der WO 01/92978 bekannt.Another on-load tap-changer with motor drive is from the WO 01/92978 known.

Die geltenden Normen wie die IEC 60214 und VDE 0532 schreiben dabei vor, dass der Motorantrieb eine Drehrlchtungsüberwachung 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 rotation monitoring and has means to ensure automatic termination of a changeover in the direction it has started. This requires a direction of rotation information. To ensure these requirements, in the known on-load tap changer a rotating field control relay for monitoring the direction of rotation and a bistable relay (surge relay) is used for automatic termination of a once started switching. However, these electronic components are expensive on the one hand and problematic on the other 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 motor drive of the type mentioned, in which the described safety requirements are realized in a simple and cost-effective manner.

Diese Aufgabe wird durch einen Laststufenschalter mit den Merkmalen des Patentanspruches gelöst.This object is achieved by an on-load tap-changer having the features of the patent claim.

Bei der Erfindung weist der Laststufenschalter verschiedene neue Merkmale auf, die in Kombination miteinander die beschriebenen Slcherheltsanforderungen 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 novel features which, in combination with each other, meet the described requirements of Slayerhelts. The direction of rotation monitoring and the restart of the motor drive are derived from essentially existing messages. It is particularly advantageous that no additional mechanical components are needed anymore; Both the described rotating 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.First of all, inductive proximity sensors are provided on the load changeover switch of the on-load tap-changer, which detect its position.

Weiterhin sind Mittel zur Entklinkungsüberwachung am Gestänge zwischen Motorantrieb und Laststufenschalter angeordnet, die Nockenschalter aufweisen.
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.Furthermore, means for Entklinkungsüberwachung are arranged on the linkage between the motor drive and on-load tap changer having cam switches.
Furthermore, means for mechanical running message of the motor drive are provided; This is detected by means of a direction-independent cam track directly on the selector drive.
Finally, electrical means for running message of the (known) motor contactors are provided.

Die Erfindung soll nachfolgend beispielhaft noch näher erläutert werden.The invention will be explained in more detail by way of example below.

Es zeigen:

Figur 1
die Anordnung der induktiven Näherungssensoren
Figur 2
die Mittel zur Entklinkungsüberwachung am Gestänge zwischen Motorantrieb und Laststufenschalter
Figur 3
die Mittel zur mechanischen Laufmeldung am Wählerantrieb
Figur 4
ein vollständiges Schaltbild des Motorantriebes als Bestandteil des erfindungsgemäßen Laststufenschalters
Figur 5
einen Schaltungsauszug mit Sicherheitseinrichtungen
Figur 6
einen schematischen Schaltablauf bei der Umschaltung von einer Wicklungsanzapfung des Trockentransformators zu einer (benachbarten) anderen Wicklungsanzapfung.
Show it:
FIG. 1
the arrangement of inductive proximity sensors
FIG. 2
the means for unlatching monitoring on the linkage between the motor drive and on-load tap-changer
FIG. 3
the means for mechanical running message on the selector drive
FIG. 4
a complete diagram of the motor drive as part of the load tap changer according to the invention
FIG. 5
a circuit extract with safety devices
FIG. 6
a schematic switching sequence when switching from a winding tap of the dry-type transformer to a (neighboring) other 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. In this case, an even / odd message is generated, which is multiplied by auxiliary contactors K13 and K14, which are explained below. The diverter switch itself switches about 20 degrees before the end of a circuit. It is assumed in the entire embodiment on a total rotation angle at each load switching of 360 degrees.

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.In Figure 2, the means for Entklinkungsüberwachung are shown in detail. For this purpose, a cam track is provided on the linkage between the motor drive and the tap changer, black in the figure, which is widened in one direction by 130 degrees, so that corresponding cam switches S23 or S24-depending on the current position and driven running direction-25 degrees Start or end of a switch on or off.

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.In Figure 3, the means for mechanical running message of the motor drive are shown. It is a direction-independent acting cam track shown, which is located directly on the selector drive. A cam switch S13 switches off 35 degrees after the start of the switchover and 35 degrees before the end of the switch again. The movement of the selector itself begins only at a rotation angle 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
Lichtbogenüberwachungseinhelt
H1
Signallampe
K1
Motorschütz
K2
Motorschütz
K13
Hilfsschütz des Näherungssensors S70
K14
Hilfsschütz des Näherungssensors S71
K20
Schrittschaltrelais
K29
Zeitrelais
M1
Motor
Q1
Motorschutzschalter
S3
Höher/Tiefer-Schalter
S4
Begrenzungsschalter für K1
S5
Begrenzungsschalter für K2
S8
A und B: Sicherheitsschalter
S13
Nockenschalter
S23
Nockenschalter
S24
Nockenschalter
S38
Potentiometerkontakt
S70
Näherungssensor
S71
Näherungssensor
X...
Terminals.
In Figure 4, the circuit diagram is shown according to the invention, which also has other known, but necessary for the explanation of the overall function components. The same applies to the actual monitoring unit shown in FIG. In these two representations mean:
F2
Lichtbogenüberwachungseinhelt
H1
Warning light
K1
motor contactor
K2
motor contactor
K13
Contactor of the proximity sensor S70
K14
Contactor of the proximity sensor S71
K20
Toggle relay
K29
time Relays
M1
engine
Q1
Motor protection switch
S3
Raise / lower switch
S4
Limit switch for K1
S5
Limit switch for K2
S8
A and B: safety switch
S13
cam switches
S23
cam switches
S24
cam switches
S38
Potentiometerkontakt
S70
Proximity sensor
S71
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:

  • Lastumschalterposition gerade (K13 aktiv, K14 Inaktiv)
    Laufrichtung rechts (K2 aktiv, K1 inaktiv, S24 aktiv, S23 inaktiv)
  • Lastumschalterposition gerade (K13 aktiv, K14 inaktiv)
    Laufrichtung links (K1 aktiv, K2 inaktiv, S23 aktiv, S24 inaktiv)
  • Lastumschalterposition ungerade (K14 aktiv, K13 inaktiv)
    Laufrichtung rechts (K2 aktiv, K1 Inaktiv, S23 aktiv, S24 inaktiv)
  • Lastumschalterposition ungerade (K14 aktiv, K13 inaktiv)
    Laufrichtung links (K1 aktiv, K2 inaktiv, S24 aktiv, S23 inaktiv).
Below is the operation of the load tap changer motor drive according to the invention, especially its safety device to meet the technical requirements mentioned in the introduction, will be explained again in context. After controlling one of the motor contactors K1 or K2, motor M1 of the motor drive starts. After 25 degrees, the cam switches S23 / S24 change their position (see Figure 2). 35 degrees after the start of the circuit, the further cam switch S13 activates the restart device or the direction of rotation monitoring (see FIG. 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 the message nor the cam switches S23, S24 of the unlatching monitoring (see FIG. your position.
During this time, the following operating states are queried:
  • Diverter switch position straight (K13 active, K14 inactive)
    Right direction (K2 active, K1 inactive, S24 active, S23 inactive)
  • Diverter switch position straight (K13 active, K14 inactive)
    Running direction left (K1 active, K2 inactive, S23 active, S24 inactive)
  • Load switch position odd (K14 active, K13 inactive)
    Right direction (K2 active, K1 inactive, S23 active, S24 inactive)
  • Load 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).Thus, according to the rules of the permutation, all possible operating states, one of which is present, can be queried. The query itself is made by the electrical connection of the above-mentioned signaling contacts. They have a direct effect 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.Below, the switching sequences are to be explained in detail again with reference to the circuit diagram shown in Figure 4. The control itself operates on the principle of stepping and meets 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 from overload and has a trip coil for shutdown. All degrees used below refer in turn to a complete rotation angle of 360 degrees per switching.

a) Lastumschalterposition ungerade, Ansteuerung rechtsa) Diverter switch position odd, control 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 odd position, S71 actuated, K14 energized and S23 actuated. After activating the motor contactor K2, the motor M1 starts in the direction "right". After 25 degrees, the unlatching monitoring cam switch has reached the position it retains throughout the test phase (35 degrees ... 325 degrees). Starting from Figure 2, the states do not change in this case; S23 remains actuated, S24 not actuated. The cam switch S13 (Figure 3) is operated at 35 degrees and activates the check and restart phases.

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.Via the cam switch S13 (activated), the NC contactor K13 open contact (not activated) to multiply the position signal of the diverter switch, voltage is applied to cam switch S24 (not activated). If, due to the correct direction of rotation S24 is not activated, voltage is applied to the coil of the motor contactor for direction "right" K2; the restart is guaranteed until the cam switch S13 drops out. Is S24, z. If, for example, due to a wrong rotating field at the connection terminals, the motor protection switch Q1 is triggered by connecting the cam switch S13 via the auxiliary contact of the motor contactor K2: 53-54.

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 Überprüfungs- und Wiederanlaufphase.The diverter switch is in odd position, S71 actuated, K14 energized and S23 actuated. After activating the motor contactor K1, the motor M1 starts in the direction "left". After 25 degrees, the unlatching monitoring cam switch has reached the position it retains throughout the test phase (35 degrees ... 325 degrees). Starting from FIG. 2, S24 is actuated; S23 drops back. The cam switch S13 (Figure 3) is operated at 35 degrees and activates the check and restart phases.

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.Via the cam switch S13 (activated), the NC contactor K13 open contact (not activated) for multiplying the position signal of the diverter switch, voltage is applied to the cam switch S24 (activated). If, due to the correct direction of rotation S24 is activated, voltage is applied to the coil of the motor contactor for the direction "left" K1; the restart is guaranteed until the cam switch S13 drops out. Is S24, z. B. due to a wrong rotary field at the terminals, not activated, the motor protection switch Q1 via the auxiliary contact of the motor contactor K1: 53-54 is triggered by connecting the cam switch S13.

c) Lastumschalterposition gerade, Ansteuerung rechtsc) Diverter switch position straight, control 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 energized and S24 actuated. After activating the motor contactor K2, the motor M1 starts in the direction "right". After 25 degrees, the unlatching monitoring cam switch has reached the position it retains throughout the test phase (35 degrees ... 325 degrees). Starting from Figure 2, the states do not change in this case; S24 remains actuated, S23 not actuated. The cam switch S13 (Figure 3) is operated at 35 degrees and activates the check and restart phases.

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.Via the cam switch S13 (activated), the NC contactor K14 opener (not activated) for multiplying the position signal of the diverter switch, voltage is applied to the cam switch S23 (activated). If, due to the correct direction of rotation S23 is not activated, voltage is applied to the coil of the motor contactor for direction "left" K2; the restart is guaranteed until the cam switch S13 drops out. Is S23, z. If, for example, due to a wrong rotating field at the connection terminals, the motor protection switch Q1 is triggered by connecting the cam switch S13 via the auxiliary contact of the motor contactor K2: 53-54.

d) Lastumschalterposition gerade, Ansteuerung linksd) Diverter switch position straight, control on 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 Überprüfungs- und Wiederanlaufphase.The diverter switch is in the straight position, S70 actuated, K13 energized and S24 actuated. After activating the motor contactor K1, the motor M1 starts in the direction "right". After 25 degrees, the unlatching monitoring cam switch has reached the position it retains throughout the test phase (35 degrees ... 325 degrees). Starting from FIG. 2, S23 is actuated, S24 drops back. The cam switch S13 (Figure 3) is operated at 35 degrees and activates the check and restart phases.

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.Via the cam switch S13 (activated), the NC contactor K14 opener (not activated) for multiplying the position signal of the diverter switch, voltage is applied to the cam switch S23 (activated). If, due to the correct direction of rotation S23 is activated, voltage is applied to the coil of the motor contactor for the direction "left"K1; the restart is guaranteed until the cam switch S13 drops out. Is S23, z. B. due to a wrong rotating field to the Terminals, not activated, are triggered by connecting the cam switch S13 of the motor protection switch Q1 via the auxiliary contact of the motor contactor K1: 53-54.

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 restart device, since all the contacts of the cam switches S23 and S24 are connected, they are automatically detected 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 lead to tripping of the motor protection switch Q1.

Claims (1)

  1. On-load tap changer with a motor drive mechanism for uninterruptable change-over operations under load between diverse tap connections in a tapped transformer, whereby it is provided with a tap selector for the pre-selection of the new tap connection not under load and a diverter switch for the actual change-over operation itself under load,
    whereby the tap selector and the diverter switch are both actuated by a drive shaft on the motor drive mechanism in such a way that the motor drive mechanism, firstly, actuates a tap selector drive on the tap selector and, secondly, winds up an energy accumulator for the subsequent actuation of the diverter switch,
    whereby the motor drive mechanism is equipped with an electric motor which can be actuated in dependency on the direction of rotation by means of a motor contactor and the circuit of which is provided with a motor protection relay,
    characterized
    in that the diverter switch is provided with inductive proximity sensors (S70, S71) for determining the respective position of the diverter switch,
    and in that the drive shaft is provided with a cam track which works in dependency on the direction of rotation and two corresponding cam switches (S23, S24),
    and in that a further cam track which works independently of the direction of rotation and which corresponds with a further cam switch (S13) is provided directly on the tap selector drive,
    and in that electrical equipment is provided for comparing each of the actual positions determined by the proximity sensors (S70, S71), the cam switches (S23, S24) and
    the other cam switch (13) with the normal states every time the on-load tap changer is actuated,
    in such a way that if at least one of these switched conditions deviates from the normal state then the motor protective switch will be capable of actuation (Q1).
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 EP1665306A1 (en) 2006-06-07
EP1665306B1 true 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

Country Status (7)

Country Link
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)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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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Publication number Priority date Publication date Assignee Title
US3427530A (en) * 1966-10-17 1969-02-11 Allis Chalmers Mfg Co Tap changing voltage regulator having means for selecting limits of tap changer motion
DE3801152A1 (en) * 1988-01-16 1989-07-27 Reinhausen Maschf Scheubeck CONTACT ARRANGEMENT SITTING IN AN INSULATING WALL FOR STEPPERS OF STEPPING TRANSFORMERS
DE4016428C1 (en) * 1990-05-22 1991-11-07 Maschinenfabrik Reinhausen Gmbh, 8400 Regensburg, De
DE4214431C3 (en) * 1992-04-30 1996-08-14 Reinhausen Maschf Scheubeck Step switch with motor drive
DE29812855U1 (en) * 1998-07-20 1998-10-01 Abb Patent Gmbh, 68309 Mannheim Drive and control unit for a three-phase switch
CN2413251Y (en) * 2000-03-30 2001-01-03 张庆德 Electrode salt-bath furnace with stepped current-limiting starting power supply
DE10016489C2 (en) * 2000-04-01 2002-01-31 Reinhausen Maschf Scheubeck Method for controlling a motor drive for a tap changer and tap changer suitable for such a method
SE519492C2 (en) * 2000-05-26 2003-03-04 Abb Ab Actuator and winding coupler including one
DE10062679C2 (en) * 2000-12-15 2003-08-14 Reinhausen Maschf Scheubeck Step switch with switching monitoring

Also Published As

Publication number Publication date
KR20070083239A (en) 2007-08-24
ATE377835T1 (en) 2007-11-15
CN1706015A (en) 2005-12-07
CN100466128C (en) 2009-03-04
DE10344142B3 (en) 2005-02-10
DE502004005453D1 (en) 2007-12-20
EP1665306A1 (en) 2006-06-07
WO2005041230A1 (en) 2005-05-06
HK1091672A1 (en) 2007-01-26

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