EP0160125B1 - On-load tap changer for tapped transformer - Google Patents

On-load tap changer for tapped transformer Download PDF

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Publication number
EP0160125B1
EP0160125B1 EP84115570A EP84115570A EP0160125B1 EP 0160125 B1 EP0160125 B1 EP 0160125B1 EP 84115570 A EP84115570 A EP 84115570A EP 84115570 A EP84115570 A EP 84115570A EP 0160125 B1 EP0160125 B1 EP 0160125B1
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EP
European Patent Office
Prior art keywords
contacts
contact
switching
distances
step contacts
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Expired
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EP84115570A
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German (de)
French (fr)
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EP0160125A2 (en
EP0160125A3 (en
Inventor
Werner Widmann
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Siemens AG
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Siemens AG
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Priority to AT84115570T priority Critical patent/ATE43025T1/en
Publication of EP0160125A2 publication Critical patent/EP0160125A2/en
Publication of EP0160125A3 publication Critical patent/EP0160125A3/en
Application granted granted Critical
Publication of EP0160125B1 publication Critical patent/EP0160125B1/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
    • H01H9/0016—Contact arrangements for tap changers

Definitions

  • the invention relates to load selectors for step transformers with main and step windings for switching from one tap to the next with fixed step contacts arranged on a circuit in an insulating cylinder, connected to the taps, and with switching contacts of three current branches on one circuit which can be pivoted on the circuit and are represented by rollers common contact carrier.
  • all three switching contacts each carry the potential of the same step contact in their rest position and lie in a row in the direction of the switching movement. Radial movements of these switching contacts with respect to the contact carrier are controlled by the fixed step contacts which simultaneously represent cams.
  • Switch contact arrangements for load selectors of this type are known, for example, from the subsequently published DE-OS-3 326 549 and DE-OS-3 401 297.
  • DE-OS-2 914 928 and DE-OS 3 123 894 show the usual arrangement of the step contacts of load selectors with equal distances apart on a circle in an insulating cylinder.
  • the step contacts assigned to the same phase are combined on a single circle.
  • this arrangement often leads to uneconomically large diameters for the insulating cylinders and the associated structure of the load selector even at nominal transformer voltages above 60 kV.
  • the requirement to ensure a surge voltage between adjacent contacts of approximately 300 kV contributes to increasing the required distances.
  • the invention is therefore based on the object to design load selectors with switch contact arrangements of the type described in such a way that their manufacture and use is also possible in transformers with nominal voltages of more than 60 kV while fully guaranteeing operational reliability and the expected service life.
  • this is achieved in that the center distance between a fixed step contact lying on the main winding and the two adjacent fixed step contacts is 20% to 60% larger than the center distance between the other fixed step contacts and that the sides of the step contact lying on the main winding and the sides of the two adjacent step contacts facing it have horn-like extensions in cross section, the spacings of which are approximately equal to the distances of the other step contacts in the direction of the switching movement of the switching contacts.
  • electrodes lying outside the insulating cylinder and covering the fastening means of the step contacts have a smaller distance from one another than the associated step contacts within the insulating cylinder.
  • the leakage current paths emanating from the step contact located in the main winding are at least 20% larger than the electrically parallel spacings of the step contacts and that the sides of the step contacts flanking the smaller center distances have bulges directed towards one another, due to which the associated leakage current paths are less than 20% larger than the electrically parallel distances.
  • the stepped contacts are convexly bulged only in their edge zones in the run-up area of the switch contacts, but are concavely curved back in their central area according to the radius of the swivel path of the switch contacts.
  • a load selector has the advantage that, using components which are already used at lower nominal voltages, can also be used in load selectors provided for higher nominal voltages, the most important advantage being that a relatively small diameter can be achieved for the insulating cylinder carrying the step contacts.
  • a main winding 16 of any phase of a transformer lies between a high-voltage terminal 23 and a step contact 1.
  • a step winding 18 is connected to the main winding 16 via a turner 19 electrically connected in series, depending on the position of the inverter 19, the voltage tapped from the step winding 18 is added to that of the main winding 16 or subtracted therefrom.
  • Step contacts 1 to 14 connected to the low-voltage end of the main winding 16 or to the taps of the step winding 18 are arranged in one plane on the inside of an insulating cylinder 17 and consequently lie on a circle.
  • Switch contacts 20, 21 and 22 guided by a contact carrier 15 are moved on this circuit and switch a load current line 24 without interruption in a known manner from step contact to step contact.
  • step contact 1 Between the step contact 1 and, depending on the position of the inverter 19, the step contact 14 or the step contact 2, however, there is the much greater voltage of the entire step winding 18. If the nominal and operating voltage of the transformer is now increased, the voltage also rises the step winding 18 and thus also the electrical load on the space between the step contact 1 and the step contact 14 or the step contact 2.
  • the center distances between the step contacts 1 and the step contact 14 or the step contact 2 according to the invention are 50% larger than the other center distances in the exemplary embodiment shown.
  • the step contacts 1, 2 and 14 are wider than the step contacts 3 to 13 in that their mutually facing sides are provided with horn-like extensions in cross section. As a result, approximately the same dimension is achieved for the lateral distance for all step contacts 1 to 14. Surprisingly, it suffices that only the leakage current path between the step contact 1 and the step contacts 2 or 14 adjacent to it remains enlarged if the nominal and operating voltage of the transformer is increased to values above 60 kV.
  • the illustrated embodiment shows an arrangement with thirteen stages. Accordingly, an increase in the center distance of a step contact connected to the main winding end of step contacts adjacent to it is also possible for other step numbers, for example eleven or fifteen.

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  • Contacts (AREA)
  • Housings And Mounting Of Transformers (AREA)
  • Protection Of Transformers (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)

Abstract

1. Load selector for step transformers with main (16) and step windings (18) for switching over from one tap to the next with fixed step contacts (1 to 14), which are arranged in a circle in an insulating cylinder (17) and are connected with the taps, and with switching contacts (20, 21, 22) of three current branches, which can be rotated simultaneously in the circle and are constituted by rollers, on a common contact carrier (15), - in which all three switching contacts (20, 21, 22), in each case, in their rest position conduct the potential of the same step contact (1 to 14) and lie in the direction of the switching movement in a series one after the other and - in which radial movements of the switching contacts (20, 21, 22) in respect of the contact carrier (15) are controlled by the fixed step contacts (1 to 14) which simultaneously constitute cams, characterised - in that the centre distance and accordingly for the contact carrier (15) the angle of rotation between a fixed step contact (1) connected to the main winding (16) and the two fixed step contacts (2 or 14) adjacent to said contact (1) is 20% to 60% greater than the centre distance or the angle of rotation between the other fixed step contacts (2 to 14) and - in that the sides of the step contact (1) connected to the main winding (16) and the sides facing said contact (1) of the two adjacent step contacts (2 to 14) bear extensions which are similar to a horn in cross section and are held at a distance from the surface of the insulating cylinder (17), the distances of which extensions from each other are approximately equal to the distances of the other step contacts (2 to 14) in the direction of the switching movement.

Description

Die Erfindung betrifft Lastwähler für Stufentransformatoren mit Stamm- und Stufenwicklungen zum Umschalten von einer Anzapfung zur nächsten mit auf einem Kreis in einem Isolierzylinder angeordneten, mit den Anzapfungen verbundenen festen Stufenkontakten und mit auf dem Kreis gleichzeitig verschwenkbaren, von Rollen dargestellten Schaltkontakten von drei Stromzweigen auf einem gemeinsamen Kontaktträger. Dabei führen alle drei Schaltkontakte in ihrer Ruhestellung jeweils das Potential desselben Stufenkontaktes und liegen in Richtung der Schaltbewegung in einer Reihe hintereinander. Radiale Bewegungen dieser Schaltkontakte gegenüber dem Kontaktträger sind von den gleichzeitig Nocken darstellenden festen Stufenkontakten gesteuert. Schaltkontaktanordnungen für derartige Lastwähler sind beispielsweise durch die nachveroffentlichten DE-OS-3 326 549 sowie DE-OS-3 401 297 bekannt.The invention relates to load selectors for step transformers with main and step windings for switching from one tap to the next with fixed step contacts arranged on a circuit in an insulating cylinder, connected to the taps, and with switching contacts of three current branches on one circuit which can be pivoted on the circuit and are represented by rollers common contact carrier. In this case, all three switching contacts each carry the potential of the same step contact in their rest position and lie in a row in the direction of the switching movement. Radial movements of these switching contacts with respect to the contact carrier are controlled by the fixed step contacts which simultaneously represent cams. Switch contact arrangements for load selectors of this type are known, for example, from the subsequently published DE-OS-3 326 549 and DE-OS-3 401 297.

Die DE-OS-2 914 928 sowie die DE-OS 3 123 894 zeigen die übliche Anordnung der Stufenkontakte von Lastwählern mit untereinander gleichen Abständen auf einem Kreis in einem Isolierzylinder. Dabei sind die jeweils derselben Phase zugeordneten Stufenkontakte auf je einem einzigen Kreis zusammengefaßt. Diese Anordnung führt jedoch bei steigenden Nennspannungen und den üblichen Stufenzahlen von 11 und 13 Stufen schon bei Transformatornennspannungen über 60 kV zu häufig unwirtschaftlich großen Durchmessern für die Isolierzylinder und den zugehörigen Aufbau der Lastwähler. Dabei trägt insbesondere das Erfordernis, eine Stehstoßspannung zwischen benachbarten Kontakten von ca. 300 kV zu gewährleisten, zur Vergrößerung der erforderlichen Abstände bei.DE-OS-2 914 928 and DE-OS 3 123 894 show the usual arrangement of the step contacts of load selectors with equal distances apart on a circle in an insulating cylinder. The step contacts assigned to the same phase are combined on a single circle. However, with increasing nominal voltages and the usual number of stages of 11 and 13 stages, this arrangement often leads to uneconomically large diameters for the insulating cylinders and the associated structure of the load selector even at nominal transformer voltages above 60 kV. In particular, the requirement to ensure a surge voltage between adjacent contacts of approximately 300 kV contributes to increasing the required distances.

Der Erfindung liegt daher die Aufgabe zugrunde, Lastwähler mit Schaltkontaktanordnungen der eingangs beschriebenen Art so zu gestalten, daß ihre Herstellung und ihr Einsatz auch in Transformatoren mit Nennspannungen von mehr als 60 kV bei voller Gewährleistung der Betriebssicherheit und der erwarteten Lebensdauer möglich ist.The invention is therefore based on the object to design load selectors with switch contact arrangements of the type described in such a way that their manufacture and use is also possible in transformers with nominal voltages of more than 60 kV while fully guaranteeing operational reliability and the expected service life.

Erfindungsgemäß wird dies dadurch erreicht, daß der Mittenabstand zwischen einem an der Stammwicklung liegenden festen Stufenkontakt und den beiden diesem benachbarten festen Stufenkontakten 20 % bis 60 % größer ist als der Mittenabstand zwischen den übrigen festen Stufenkontakten und daß die Seiten des an der Stammwicklung liegenden Stufenkontaktes und die diesem zugekehrten Seiten der beiden benachbarten Stufenkontakte im Querschnitt hornähnliche Fortsätze tragen, deren Abstände voneinander annähernd gleich den Abständen der übrigen Stufenkontakte in Richtung der Schaltbewegung der Schaltkontakte sind.According to the invention this is achieved in that the center distance between a fixed step contact lying on the main winding and the two adjacent fixed step contacts is 20% to 60% larger than the center distance between the other fixed step contacts and that the sides of the step contact lying on the main winding and the sides of the two adjacent step contacts facing it have horn-like extensions in cross section, the spacings of which are approximately equal to the distances of the other step contacts in the direction of the switching movement of the switching contacts.

Nach einer vorteilhaften Weiterbildung der Erfindung haben außerhalb des Isolierzylinders liegende, die Befestigungsmittel der Stufenkontakte abdeckende Elektroden einen kleineren Abstand voneinander als die zugehörigen Stufenkontakte innerhalb des Isolierzylinders.According to an advantageous development of the invention, electrodes lying outside the insulating cylinder and covering the fastening means of the step contacts have a smaller distance from one another than the associated step contacts within the insulating cylinder.

Nach zweckmäßigen Ausgestaltungen der Erfindung ist vorgesehen, da die von dem in der Stammwicklung liegenden Stufenkontakt ausgehenden Kriechstromstrecken um mindestens 20 % größer sind als die elektrisch parallel liegenden Abstände der Stufenkontakte und daß die die kleineren Mittenabstände flankierenden Seiten der Stufenkontakte aufeinanderzu gerichtete Ausbauchungen aufweisen, durch die die zugehörigen Kriechstromstrecken um weniger als 20 % größer sind als die elektrisch parallel liegenden Abstände.According to expedient refinements of the invention, it is provided that the leakage current paths emanating from the step contact located in the main winding are at least 20% larger than the electrically parallel spacings of the step contacts and that the sides of the step contacts flanking the smaller center distances have bulges directed towards one another, due to which the associated leakage current paths are less than 20% larger than the electrically parallel distances.

Gemäß einer weiteren Fortbildung der Erfindung sind die Stufenkontakte lediglich in ihren Randzonen im Auflaufbereich der Schaltkontakte ballig vorgewölbt, in ihrem Mittenbereich jedoch entsprechend dem Radius der Schwenkbahn der Schaltkontakte konkav zurückgewölbt.According to a further development of the invention, the stepped contacts are convexly bulged only in their edge zones in the run-up area of the switch contacts, but are concavely curved back in their central area according to the radius of the swivel path of the switch contacts.

Der erfindungsgemäße Aufbau eines Lastwählers hat den Vorteil, daß unter Verwendung von im wesentlichen schon bei kleineren Nennspannungen eingesetzten Bauteilen auch in für höhere Nennspannungen vorgesehenen Lastwählern einsetzbar bleiben, wobei als wichtigster Vorteil ein verhältnismäßig kleiner Durchmesser für den die Stufenkontakte tragenden Isolierzylinder erreichbar ist. Diese Vorteile ergeben sich bei Ausführung eines Lastwählers mit unterschiedlich großen Mittenabständen der Stufenkontakte, weil die von Rollen dargestellten Schaltkontakte in den Stellungen auf Stufenkontakten mit normaler Breite jeweils links und rechts des Stufenkontaktes und im Gegensatz hierzu in den Stellungen auf verbreiterten Stufenkontakten die Kontaktrollen der Schaltkontakte nicht seitlich an den Stufenkontakten, sondern auf deren innerer Oberfläche liegen.The construction of a load selector according to the invention has the advantage that, using components which are already used at lower nominal voltages, can also be used in load selectors provided for higher nominal voltages, the most important advantage being that a relatively small diameter can be achieved for the insulating cylinder carrying the step contacts. These advantages result from the design of a load selector with different center distances of the step contacts, because the switch contacts shown by rollers in the positions on step contacts with normal widths on the left and right of the step contact and, in contrast, in the positions on widened step contacts, the contact roles of the switch contacts are not on the side of the step contacts, but on their inner surface.

Ein Ausführungsbeispiel der Erfindung wird anhand einer Zeichnung näher beschrieben. Dabei zeigt:

  • Fig. 1 die Schaltung für einen Transformator mit Stamm- und Stufenwicklung und
  • Fig. 2 die Anordnung der für eine Phase vorgesehenen Stufen- und Schaltkontakte in einem Isolierzylinder.
An embodiment of the invention is described in more detail with reference to a drawing. It shows:
  • Fig. 1 shows the circuit for a transformer with primary and step winding and
  • Fig. 2 shows the arrangement of the step and switch contacts provided for a phase in an insulating cylinder.

Einander entsprechende Bauteile sind in beiden Figuren mit gleichen Bezugszeichen versehen.Corresponding components are provided with the same reference symbols in both figures.

Eine Stammwicklung 16 einer beliebigen Phase eines Transformators liegt zwischen einer Hochspannungsklemme 23 und einem Stufenkontakt 1. Über einen Wender 19 ist eine Stufenwicklung 18 mit der Stammwicklung 16 elektrisch in Reihe geschaltet, wobei je nach Stellung des Wenders 19 die von der Stufenwicklung 18 abgegriffene Spannung zu derjenigen der Stammwicklung 16 addiert oder von dieser subtrahiert wird.A main winding 16 of any phase of a transformer lies between a high-voltage terminal 23 and a step contact 1. A step winding 18 is connected to the main winding 16 via a turner 19 electrically connected in series, depending on the position of the inverter 19, the voltage tapped from the step winding 18 is added to that of the main winding 16 or subtracted therefrom.

Mit dem niederspannungsseitigen Ende der Stammwicklung 16 bzw. mit den Anzapfungen der Stufenwicklung 18 verbundene Stufenkontakte 1 bis 14 sind in einer Ebene auf der Innenseite eines Isolierzylinders 17 angeordnet und liegen demzufolge auf einem Kreis. Auf diesem Kreis werden von einem Kontaktträger 15 geführte Schaltkontakte 20, 21 und 22 bewegt, die in bekannter Art und Weise eine Laststromleitung 24 unterbrechungslos von Stufenkontakt zu Stufenkontakt umschalten.Step contacts 1 to 14 connected to the low-voltage end of the main winding 16 or to the taps of the step winding 18 are arranged in one plane on the inside of an insulating cylinder 17 and consequently lie on a circle. Switch contacts 20, 21 and 22 guided by a contact carrier 15 are moved on this circuit and switch a load current line 24 without interruption in a known manner from step contact to step contact.

Durch die ständige Verbindung der Stufenkontakte 2 bis 14 mit den zugehörigen Anzapfungen der Stufenwicklung 18 liegt zwischen den jeweils einander benachbarten dieser Stufenkontakte 2 bis 14 lediglich die von jeweils einer Stufe abgegriffene, auch beim Auftreten von Stehstoßspannungen verhältnismäßig kleine Stufenspannung. Für die Abstände und die Länge der Kriechstromstrecken zwischen jeweils benachbarten der Stufenkontakte 2 bis 14 genügen daher die in bisher üblichen Lastwählern erreichten Größen. Dies gilt auch bei einer Erhöhung der Nenn- und Betriebsspannung des Transformators auf Werte über 60 kV.Due to the constant connection of the tap contacts 2 to 14 with the associated taps of the tap winding 18, only the tap voltage, which is tapped from one tap, is relatively small between the respective adjacent tap contacts 2 to 14, even when standing impulse voltages occur. For the distances and the length of the leakage current paths between respectively adjacent one of the step contacts 2 to 14, the sizes achieved in load selectors which have been customary to date are therefore sufficient. This also applies if the nominal and operating voltage of the transformer is increased to values above 60 kV.

Zwischen dem Stufenkontakt 1 und, je nach Stellung des Wenders 19, dem Stufenkontakt 14 bzw. dem Stufenkontakt 2, liegt jedoch die wesentlich größere Spannung der gesamten Stufenwicklung 18. Wird nun die Nenn- und Betriebsspannung des Transformators erhöht, so steigt auch die Spannung an der Stufenwicklung 18 und damit auch die elektrische Belastung des Raumes zwischen dem Stufenkontakt 1 und dem Stufenkontakt 14 bzw. dem Stufenkontakt 2.Between the step contact 1 and, depending on the position of the inverter 19, the step contact 14 or the step contact 2, however, there is the much greater voltage of the entire step winding 18. If the nominal and operating voltage of the transformer is now increased, the voltage also rises the step winding 18 and thus also the electrical load on the space between the step contact 1 and the step contact 14 or the step contact 2.

In Abweichung von den bisher im Hinblick auf die Schaltkontaktanordnung vorgesehenen, für alle Stufenkontakte 1 bis 14 gleich großen Mittenabständen sind die Mittenabstände zwischen den Stufenkontakten 1 und dem Stufenkontakt 14 bzw. dem Stufenkontakt 2 erfindungsgemäß beim dargestellten Ausführungsbeispiel um 50 % größer als die übrigen Mittenabstände.In deviation from the center distances previously provided with regard to the switching contact arrangement, which are the same for all step contacts 1 to 14, the center distances between the step contacts 1 and the step contact 14 or the step contact 2 according to the invention are 50% larger than the other center distances in the exemplary embodiment shown.

Um trotzdem mit ein und derselben Schaltkontaktanordnung alle Stufenkontakte 1 bis 14 anwählen zu können, sind die Stufenkontakte 1, 2 und 14 breiter als die Stufenkontakte 3 bis 13 ausgeführt, indem ihre einander zugekehrten Seiten mit im Querschnitt hornähnlichen Fortsätzen versehen sind. Dadurch ist für den seitlichen Abstand für alle Stufenkontakte 1 bis 14 ein annähernd gleiches Maß erreicht. Überraschenderweise genügt es, daß lediglich der Kriechstromweg zwischen dem Stufenkontakt 1 und den diesem benachbarten Stufenkontakten 2 bzw. 14 vergrößert bleibt, wenn eine Erhöhung der Nenn- und Betriebsspannung des Transformators auf Werte über 60 kV vorgenommen wird.In order to be able to select all the step contacts 1 to 14 with the same switching contact arrangement, the step contacts 1, 2 and 14 are wider than the step contacts 3 to 13 in that their mutually facing sides are provided with horn-like extensions in cross section. As a result, approximately the same dimension is achieved for the lateral distance for all step contacts 1 to 14. Surprisingly, it suffices that only the leakage current path between the step contact 1 and the step contacts 2 or 14 adjacent to it remains enlarged if the nominal and operating voltage of the transformer is increased to values above 60 kV.

Das dargestellte Ausführungsbeispiel zeigt eine Anordnung mit dreizehn Stufen. Entsprechend ist eine Vergrößerung des Mittenabstandes eines mit dem Stammwicklungsende verbundenen Stufenkontaktes von ihm benachbarten Stufenkontakten auch bei anderen Stufenzahlen, beispielsweise bei elf oder fünfzehn, möglich.The illustrated embodiment shows an arrangement with thirteen stages. Accordingly, an increase in the center distance of a step contact connected to the main winding end of step contacts adjacent to it is also possible for other step numbers, for example eleven or fifteen.

BezugszeichenlisteReference symbol list

Figure imgb0001
Figure imgb0001

Claims (5)

1. Load selector for step transformers with main (16) and step windings (18) for switching over from one tap to the next with fixed step contacts (1 to 14), which are arranged in a circle in an insulating cylinder (17) and are connected with the taps, and with switching contacts (20, 21, 22) of three current branches, which can be rotated simultaneously in the circle and are constituted by rollers, on a common contact carrier (15),
- in which all three switching contacts (20, 21, 22), in each case, in their rest position conduct the potential of the same step contact (1 to 14) and lie in the direction of the switching movement in a series one after the other and
- in which radial movements of the switching contacts (20, 21, 22) in respect of the contact carrier (15) are controlled by the fixed step contacts (1 to 14) which simultaneously constitute cams, characterised
- in that the centre distance and accordingly for the contact carrier (15) the angle of rotation between a fixed step contact (1) connected to the main winding (16) and the two fixed step contacts (2 or 14) adjacent to said contact (1) is 20 % to 60 % greater than the centre distance or the angle of rotation between the other fixed step contacts (2 to 14) and
- in that the sides of the step contact (1) connected to the main winding (16) and the sides facing said contact (1) of the two adjacent step contacts (2 to 14) bear extensions which are similar to a horn in cross section and are held at a distance from the surface of the insulating cylinder (17), the distances of which extensions from each other are approximately equal to the distances of the other step contacts (2 to 14) in the direction of the switching movement.
2. Load selector according to claim 1, characterised in that electrodes, which lie outside the insulating cylinder (17) and cover the fixing means of the step contacts (1 to 14), are at a shorter distance from each other than the pertinent step contacts (1 to 14).
3. Load selector according to claim 1 and 2, characterised in that the creepage current paths, originating from the step contact (1) connected to the main winding (16), are greater by at least 20 % than the distances, which lie electrically parallel, of the step contacts (1, 2 or 14).
4. Load selector according to claim 1 to 3, characterised in that the sides, flanking the shorter centre distances, of the step contacts (2 to 14) have bulging portions which are directed towards each other and through which the pertinent creepage current paths are greater by less than 20 % than the distances which lie electrically parallel.
5. Load selector according to claim 1 to 4, characterised in that the step contacts (1 to 14) are curved forward in a convex manner merely in their edge zones in the run-up area of the switching contacts (20, 21, 22), yet in their central area are curved back in a concave manner in accordance with the radius of the rotation path of the switching contacts (20, 21, 22).
EP84115570A 1984-04-30 1984-12-17 On-load tap changer for tapped transformer Expired EP0160125B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84115570T ATE43025T1 (en) 1984-04-30 1984-12-17 LOAD SELECTOR FOR TAP TRANSFORMERS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3416050 1984-04-30
DE19843416050 DE3416050A1 (en) 1984-04-30 1984-04-30 LOAD SELECTOR FOR STAGE TRANSFORMERS

Publications (3)

Publication Number Publication Date
EP0160125A2 EP0160125A2 (en) 1985-11-06
EP0160125A3 EP0160125A3 (en) 1986-12-10
EP0160125B1 true EP0160125B1 (en) 1989-05-10

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JP (2) JPS60236204A (en)
AT (1) ATE43025T1 (en)
DE (2) DE3416050A1 (en)

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WO2008031302A1 (en) * 2006-09-12 2008-03-20 Wuhan Taipu Transformer Changer Co., Ltd. Non-excited tap-changer with shielding device

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GB2420447B (en) * 2004-11-19 2008-02-27 Invensys Controls Uk Ltd Switching mechanism
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DE102016104499B3 (en) * 2016-03-11 2017-04-27 Maschinenfabrik Reinhausen Gmbh Selector for an on-load tap-changer and on-load tap-changer with diverter switch and selector
CN106057508B (en) * 2016-07-13 2019-04-30 武汉泰普变压器开关有限公司 A kind of off circuit tap changer
CN106024435B (en) * 2016-07-14 2019-07-23 武汉泰普变压器开关有限公司 A kind of off circuit tap changer convenient for transferring the files
CN109741979B (en) * 2018-12-27 2024-05-03 西门子能源变压器(武汉)有限公司 Switching device of transformer and transformer

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DE3401297A1 (en) * 1984-01-16 1985-07-18 Transformatoren Union Ag, 7000 Stuttgart LOAD SELECTOR FOR STAGE TRANSFORMERS

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JPS5237041B2 (en) * 1974-09-25 1977-09-20
DE2815047C2 (en) * 1978-04-07 1985-07-18 Maschinenfabrik Reinhausen Gebrüder Scheubeck GmbH & Co KG, 8400 Regensburg Three-phase tap selector for tap transformers
DE2914928C2 (en) * 1979-04-12 1983-02-24 Maschinenfabrik Reinhausen Gebrüder Scheubeck GmbH & Co KG, 8400 Regensburg Contact arrangement for load selectors of step transformers
DE2967539D1 (en) * 1979-11-21 1985-12-05 Acec Electrical apparatus comprising a series of voltage taps and mobile selector equipment
GB2078445B (en) * 1980-06-17 1984-04-18 Ass Tapchangers Ltd An on-load tap selector

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DE3326549A1 (en) * 1983-07-22 1985-02-07 Transformatoren Union Ag, 7000 Stuttgart LOAD SELECTOR FOR STAGE TRANSFORMERS
DE3401297A1 (en) * 1984-01-16 1985-07-18 Transformatoren Union Ag, 7000 Stuttgart LOAD SELECTOR FOR STAGE TRANSFORMERS

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008031302A1 (en) * 2006-09-12 2008-03-20 Wuhan Taipu Transformer Changer Co., Ltd. Non-excited tap-changer with shielding device
DE112007001415B4 (en) * 2006-09-12 2017-04-06 Wuhan Taipu Transformer Changer Co., Ltd. Voltage-free tap changer for a cage-type transformer

Also Published As

Publication number Publication date
DE3416050A1 (en) 1985-10-31
EP0160125A2 (en) 1985-11-06
JPH0672230U (en) 1994-10-07
EP0160125A3 (en) 1986-12-10
JPH0726825Y2 (en) 1995-06-14
ATE43025T1 (en) 1989-05-15
JPS60236204A (en) 1985-11-25
DE3478164D1 (en) 1989-06-15

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