EP0110269B1 - Contact device for the step selectors of step transformers - Google Patents

Contact device for the step selectors of step transformers Download PDF

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Publication number
EP0110269B1
EP0110269B1 EP83111579A EP83111579A EP0110269B1 EP 0110269 B1 EP0110269 B1 EP 0110269B1 EP 83111579 A EP83111579 A EP 83111579A EP 83111579 A EP83111579 A EP 83111579A EP 0110269 B1 EP0110269 B1 EP 0110269B1
Authority
EP
European Patent Office
Prior art keywords
contact
bridges
tap
ring
places
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP83111579A
Other languages
German (de)
French (fr)
Other versions
EP0110269A1 (en
Inventor
Dieter Dr.-Ing. Dohnal
Günter Dipl.-Ing. Kloth (FH)
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
Original Assignee
Maschinenfabrik Reinhausen GmbH
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 filed Critical Maschinenfabrik Reinhausen GmbH
Priority to AT83111579T priority Critical patent/ATE19444T1/en
Publication of EP0110269A1 publication Critical patent/EP0110269A1/en
Application granted granted Critical
Publication of EP0110269B1 publication Critical patent/EP0110269B1/en
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/29—Terminals; Tapping arrangements for signal inductances
    • 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 a contact arrangement for step selectors of step transformers, as described in the preamble of the claim.
  • Such contact arrangements are known: DE-PS 1170040.
  • a difficulty with such contact arrangements lies in the fact that when the contact bridges run onto a fixed contact rod, the two contact bridges must be pressed apart by overcoming the contact pressure springs before they engage around the fixed contact rod with their V-shaped indentation. This places considerable demands on the drive of the step selector and, of course, also leads to signs of wear.
  • Object of the invention is to improve the entrance Unspecified contact arrangement to get along particularly with lower driving forces and in order to keep the wear and tear 'minimum.
  • the advantage achieved by the invention is, in particular, that a step selector equipped with the contact arrangement according to the invention is easier to operate than other step selectors, and consequently the wear can also be kept low, which increases the mechanical life.
  • the contact arrangement essentially consists of a contact ring 1, two opposing contact bridges 2, 3 with associated contact pressure springs 4 and a plurality of fixed contact rods 5 arranged radially to the contact ring, of which only one is shown for the sake of clarity .
  • the contact ring 1 is held in the usual way by a selector column, which also receives the electrical connecting lines, while the fixed step contacts, which are designed as contact rods 5, are seated in the usual way on a frame made of insulating rods which are arranged coaxially to the selector column.
  • the contact bridges 2, 3, which can be pivoted laterally in the direction of the arrow, are always in contact with the contact ring 1 with one end 21, 31 each. These ends 21, 31 are shaped such that the contact ring 1 is encompassed, two contact points 6 and 7 respectively forming on the contact ring as a result of additional impressions, which lie one behind the other with respect to the longitudinal axis of the contact bridge.
  • the free ends 22, 32 of the two contact bridges 2, 3 rest on the contact rod 5 by means of V-shaped indentations in the switched state, two contact points 8 and 9 also being formed by corresponding impressions, which are opposite the contact points 6 and 7 am Contact ring 1 are offset by about 90 °.
  • each contact bridge 2, 3 which is not involved in making contact has a cross-section which is curved toward the other contact bridge, the two curved surfaces of both contact bridges 2, 3 lying against one another in the non-switched state and as a result of the stamped contact points 6 or 7 are in an unstable position so that they can be easily rolled over. This practically involves a tilting around the stamped contact points 6 and 7.
  • the two contact bridges 2, 3 are brought into contact by pivoting laterally with the contact rod 5, the contact bridges 2, 3 run onto the contact rod 5, which is achieved by means of the two contact surfaces 10, 11 takes place, first rolling of the two curved surfaces lying against one another (FIG. 1), as a result of which the run-on opening for the contact rod 5 on the V-shaped indentation of the two contact bridges 2, 3 opens, without the two contact bridges being exposed to the clear width caused by the contact rod 5 is specified, must be pressed apart. As soon as the contact bridges 2, 3 have reached their central position with respect to the contact rod 5, self-adjustment takes place with the formation of two contact points 8 and 9 on the contact rod 5 (see FIG. 5).
  • the mutual rolling of the two contact bridges 2, 3 against each other is facilitated here in that the two contact points 6 and 7 on the contact ring 1 are also formed as raised impressions, these impressions lying one behind the other in the longitudinal direction of the contact bridge.
  • the contact bridge 2, 3, which is made of flat material, is designed in such a way that it can easily be manufactured as an embossed part in one operation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Contacts (AREA)
  • Tumbler Switches (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Electrotherapy Devices (AREA)
  • Push-Button Switches (AREA)
  • Measuring Leads Or Probes (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)

Abstract

1. Contact arrangement for tap selectors of tapped transformers for the selective bridging-over of an inner contact ring (1) with tap contacts (5) arranged on an outer circle, with the following features : - two contact bridges (2, 3), which lie opposite each other and are pressable against each other by springs (4) of flat material, each lie constantly by a respective end (21, 31) against the contact ring (1), - the contact bridges are pivotable laterally from tap contact (5) to tap contact, - the contact ring (1) is encompassed by the inwardly fromed ends (21, 31) of both the contact bridges in such a manner that two contact places (6 or 7), lying one behind the other in longitudinal direction of the contact bridges, are present each time at the contact ring (1), - the tap contacts (5) are constructed as contact rods (5) of substantially round cross-section and extending in longitudinal direction of the contact bridges, - the free ends (22, 32) of both the contact bridges (2, 3) between them in the switched state receive a tap contact (5) by means of V-shaped inward formations, in such a manner that two contact places (8 or 9), which are displaced through 90 degrees at the contact ring relative to the contact places (6 or 7), respectively are likewise present, - the free ends of the contact bridges (2, 3) are provided with run-up surfaces (10 or 11) bent away outwardly for the better running-up onto the contact rod (5), - all contact places (6, 7, 8, 9) to be formed by the contact bridges (2, 3) are formed as raised stamped portions, characterised thereby, that the middle part of each contact bridge (2, 3) does not participate in the contact making and displays a cross-section which is bowed towards the other contact bridge, wherein both the bowed surfaces of both the contact bridges lie one against the other in the un-switched state and are rollable one on the other during the running-up onto the contact rod (5).

Description

Die Erfindung betrifft eine Kontaktanordnung für Stufenwähler von Stufentransformatoren, wie sie im Oberbegriff des Patentanspruches näher bezeichnet ist. Derartige Kontaktanordnungen sind bekannt: DE-PS 1170040.The invention relates to a contact arrangement for step selectors of step transformers, as described in the preamble of the claim. Such contact arrangements are known: DE-PS 1170040.

Eine Schwierigkeit bei derartigen Kontaktanordnungen liegt darin, dass beim Auflaufen der Kontaktbrücken auf einen feststehenden Kontaktstab die beiden Kontaktbrücken unter Übewindung der Kontaktdruckfedern auseinandergedrückt werden müssen, bevor sie mit ihrer V-förmigen Einformung den feststehenden Kontaktstab umgreifen. Dies stellt erhebliche Anforderungen an den Antrieb des Stufenwähters und führt natürlich auch zu Verschleisserscheinungen.A difficulty with such contact arrangements lies in the fact that when the contact bridges run onto a fixed contact rod, the two contact bridges must be pressed apart by overcoming the contact pressure springs before they engage around the fixed contact rod with their V-shaped indentation. This places considerable demands on the drive of the step selector and, of course, also leads to signs of wear.

Aufgabe der Erfindung ist es, die eingangsnäher bezeichnete Kontaktanordnung zu verbessern, um insbesondere mit geringeren Antriebskräften auszukommen und um damit den Verschleiss so'gering wie möglich zu halten.Object of the invention is to improve the entrance Unspecified contact arrangement to get along particularly with lower driving forces and in order to keep the wear and tear 'minimum.

Diese Aufgabe wird erfindungsgemäss durch die im Kennzeichen des Patentanspruches angegebenen Mittel gelöst.This object is achieved according to the invention by the means specified in the characterizing part of the patent claim.

Der mit der Erfindung erzielte Vorteil liegt insbesondere darin, dass sich ein mit der erfindungsgemässen Kontaktanordnung ausgerüsteter Stufenwähler gegenüber anderen Stufenwählern leichter betätigen lässt und dass infolgedessen auch der Verschleiss gering gehalten werden kann, wodurch die mechanische Lebensdauer vergrössert wird.The advantage achieved by the invention is, in particular, that a step selector equipped with the contact arrangement according to the invention is easier to operate than other step selectors, and consequently the wear can also be kept low, which increases the mechanical life.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher beschrieben. Es zeigen:

  • Fig. 1 die Kontaktanordnung im Moment des Auflaufens auf einen feststehenden Kontaktstab (ohne Kontaktdruckfedern),
  • Fig. 2 dieselbe Kontaktanordnung im geschalteten Zustand,
  • Fig. 3 einen Querschnitt durch den nicht an der Kontaktgabe beteiligten Mittelteil der beiden Kontaktbrücken,
  • Fig. 4 eine Seitenansicht der Kontaktanordnung, und
  • Fig. 5 die Kontaktgabe am Kontaktstab.
An embodiment of the invention is shown in the drawing and will be described in more detail below. Show it:
  • 1 shows the contact arrangement at the moment of emergence on a fixed contact rod (without contact pressure springs),
  • 2 the same contact arrangement in the switched state,
  • 3 shows a cross section through the middle part of the two contact bridges which is not involved in making contact,
  • Fig. 4 is a side view of the contact arrangement, and
  • Fig. 5 shows the contact on the contact rod.

Wie aus den Figuren ersichtlich, besteht die Kontaktanordnung im wesentlichen aus einem Kontaktring 1, aus zwei sich gegenüberliegenden Kontaktbrücken 2, 3 mit zugehörigen Kontaktdruckfedern 4 sowie aus mehreren, radial zum Kontaktring angeordneten feststehenden Kontaktstäben 5, von denen der Übersichtlichkeit wegen jedoch nur einer dargestellt ist. Der Kontaktring 1 wird auf übliche Weise von einer Wählersäule, die auch die elektrischen Verbindungsleitungen aufnimmt, gehalten, während die feststehenden, als Kontaktstäbe 5 ausgebildeten Stufenkontakte auf übliche Weise an einem Gerüst aus Isolierstäben, die koaxial zur Wählersäule angeordnet sind, sitzen. Diese Dinge sind jedoch im einzelnen nicht dargestellt, da sie für das Verständnis der vorliegenden Erfindung nicht erforderlich sind.As can be seen from the figures, the contact arrangement essentially consists of a contact ring 1, two opposing contact bridges 2, 3 with associated contact pressure springs 4 and a plurality of fixed contact rods 5 arranged radially to the contact ring, of which only one is shown for the sake of clarity . The contact ring 1 is held in the usual way by a selector column, which also receives the electrical connecting lines, while the fixed step contacts, which are designed as contact rods 5, are seated in the usual way on a frame made of insulating rods which are arranged coaxially to the selector column. However, these matters are not shown in detail since they are not necessary for an understanding of the present invention.

Die seitlich in Pfeilrichtung verschwenkbaren Kontaktbrücken 2, 3 liegen mit je einem Ende 21, 31 ständig am Kontaktring 1 an. Diese Enden 21, 31 sind derart geformt, dass der Kontaktring 1 umgriffen wird, wobei sich durch zusätzliche Anprägungen jeweils zwei Kontaktstellen 6 bzw. 7 am Kontaktring bilden, die in bezug auf die Längsachse der Kontaktbrücke hintereinander liegen. Die freien Enden 22, 32 der beiden Kontaktbrücken 2, 3 liegen mittels V-förmiger Einformungen im geschalteten Zustand am Kontaktstab 5 an, wobei ebenfalls durch entsprechende Anprägungen je zwei Kontaktstellen 8 bzw. 9 gebildet werden, die gegenüber den Kontaktstellen 6 bzw. 7 am Kontaktring 1 um etwa 90° versetzt sind. Die freien Enden 22, 23 der beiden Kontaktbrücken 2, 3 sind dann weiter mit abgebogenen Auflaufflächen 10, 11 versehen, um ein besseres Auflaufen auf den feststehenden Kontaktstab 5 zu ermöglichen. Wie insbesondere aus Fig. 3 ersichtlich, weist der nicht an der Kontaktgabe beteiligte Mittelteil jeder Kontaktbrücke 2, 3 einen zur anderen Kontaktbrücke hin gewölbten Querschnitt auf, wobei die beiden gewölbten Oberflächen beider Kontaktbrücken 2, 3 im nicht geschalteten Zustand gegeneinanderliegen und infolge der angeprägten Kontaktstellen 6 bzw. 7 eine instabile Lage einnehmen, so dass sie leicht aneinander abwälzbar sind. Hierbei erfolgt praktisch ein Kippen um die angeprägten Kontaktstellen 6 bzw. 7.The contact bridges 2, 3, which can be pivoted laterally in the direction of the arrow, are always in contact with the contact ring 1 with one end 21, 31 each. These ends 21, 31 are shaped such that the contact ring 1 is encompassed, two contact points 6 and 7 respectively forming on the contact ring as a result of additional impressions, which lie one behind the other with respect to the longitudinal axis of the contact bridge. The free ends 22, 32 of the two contact bridges 2, 3 rest on the contact rod 5 by means of V-shaped indentations in the switched state, two contact points 8 and 9 also being formed by corresponding impressions, which are opposite the contact points 6 and 7 am Contact ring 1 are offset by about 90 °. The free ends 22, 23 of the two contact bridges 2, 3 are then further provided with bent contact surfaces 10, 11 in order to enable better contact with the fixed contact rod 5. As can be seen in particular from FIG. 3, the middle part of each contact bridge 2, 3 which is not involved in making contact has a cross-section which is curved toward the other contact bridge, the two curved surfaces of both contact bridges 2, 3 lying against one another in the non-switched state and as a result of the stamped contact points 6 or 7 are in an unstable position so that they can be easily rolled over. This practically involves a tilting around the stamped contact points 6 and 7.

Werden, wie insbesondere aus Fig. 1 ersichtlich, die beiden Kontaktbrücken 2, 3 durch seitliches Verschwenken mit dem Kontaktstab 5 zur Kontaktgabe gebracht, so bewirkt das Auflaufen der Kontaktbrücken 2, 3 auf den Kontaktstab 5, was ja mittels der beiden Auflaufflächen 10, 11 erfolgt, zunächst ein Abwälzen der beiden aneinanderliegenden gewölbten Flächen (Fig. 1), wodurch sich die Auflauföffnung für den Kontaktstab 5 an der V-förmigen Einformung der beiden Kontaktbrükken 2,3 öffnet, ohne dass die beiden Kontaktbrükken auf die lichte Weite, die durch den Kontaktstab 5 vorgegeben ist, auseinandergedrückt werden müssen. Sobald die Kontaktbrücken 2, 3 ihre Mittellage zum Kontaktstab 5 erreicht haben, erfolgt eine Eigenjustierung unter Bildung von je zwei Kontaktstellen 8 bzw. 9 am Kontaktstab 5 (vgl. Fig. 5). Das gegenseitige Abwälzen der beiden Kontaktbrücken 2, 3 aneinander wird hierbei dadurch erleichtert, dass die beiden Kontaktstellen 6 bzw. 7 am Kontaktring 1 ebenfalls als erhabene Anprägungen ausgebildet sind, wobei diese Anprägungen in Längsrichtung der Kontaktbrücke hintereinanderliegen. Die aus Flachmaterial bestehende Kontaktbrücke 2, 3 ist so gestaltet, dass sie ohne weiteres in einem Arbeitsgang als Prägeteil herstellbär ist.If, as can be seen in particular from FIG. 1, the two contact bridges 2, 3 are brought into contact by pivoting laterally with the contact rod 5, the contact bridges 2, 3 run onto the contact rod 5, which is achieved by means of the two contact surfaces 10, 11 takes place, first rolling of the two curved surfaces lying against one another (FIG. 1), as a result of which the run-on opening for the contact rod 5 on the V-shaped indentation of the two contact bridges 2, 3 opens, without the two contact bridges being exposed to the clear width caused by the contact rod 5 is specified, must be pressed apart. As soon as the contact bridges 2, 3 have reached their central position with respect to the contact rod 5, self-adjustment takes place with the formation of two contact points 8 and 9 on the contact rod 5 (see FIG. 5). The mutual rolling of the two contact bridges 2, 3 against each other is facilitated here in that the two contact points 6 and 7 on the contact ring 1 are also formed as raised impressions, these impressions lying one behind the other in the longitudinal direction of the contact bridge. The contact bridge 2, 3, which is made of flat material, is designed in such a way that it can easily be manufactured as an embossed part in one operation.

Claims (1)

  1. Contact arrangement for tap selectors of tapped transformers for the selective bridging-over of an inner contact ring (1) with tap contacts (5) arranged on an outer circle, with the following features:
    - two contact bridges (2,3), which lie opposite each other and are pressable against each other by springs (4) of flat material, each lie constantly by a respective end (21, 31 ) against the contact ring (1),
    - the contact bridges are pivotable laterally from tap contact (5) to tap contact,
    - the contact ring (1) is encompassed by the inwardly formed ends (21,31) of both the contact bridges in such a manner that two contact places (6 or 7), lying one behind the other in longitudinal direction of the contact bridges, are present each time at the contact ring (1),
    - the tap contacts (5) are constructed as contact rods (5) of substantially round cross-section and extending in longitudinal direction of the contact bridges,
    - the free ends (22, 32) of both the contact bridges (2, 3) between them in the switched state receive a tap contact (5) by means of V-shaped inward formations, in such a mannerthattwo contact places (8 or 9), which are displaced through 90° at the contact ring relative to the contact places (6 or 7), respectively are likewise present,
    - the free ends of the contact bridges (2, 3) are provided with run-up surfaces (10 or 11) bent away outwardly for the better running-up onto the contact rod (5),
    - all contact places (6, 7, 8, 9) to be formed by the contact bridges (2, 3) are formed as raised stamped portions,

    characterised thereby, that the middle part of each contact bridge (2, 3) does not participate in the contact making and displays a cross-section which is bowed towards the other contact bridge, wherein both the bowed surfaces of both the contact bridges lie one against the other in the unswitched state and are rollable one on the other during the running-up onto the contact rod (5).
EP83111579A 1982-11-26 1983-11-19 Contact device for the step selectors of step transformers Expired EP0110269B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83111579T ATE19444T1 (en) 1982-11-26 1983-11-19 CONTACT ARRANGEMENT FOR TAP SELECTORS OF TAP TRANSFORMERS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3243834 1982-11-26
DE3243834A DE3243834C1 (en) 1982-11-26 1982-11-26 Contact arrangement for tap changers of tap transformers

Publications (2)

Publication Number Publication Date
EP0110269A1 EP0110269A1 (en) 1984-06-13
EP0110269B1 true EP0110269B1 (en) 1986-04-23

Family

ID=6179156

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83111579A Expired EP0110269B1 (en) 1982-11-26 1983-11-19 Contact device for the step selectors of step transformers

Country Status (7)

Country Link
EP (1) EP0110269B1 (en)
JP (1) JPS59105307A (en)
KR (1) KR900000431B1 (en)
AT (1) ATE19444T1 (en)
DE (1) DE3243834C1 (en)
ES (1) ES8407239A1 (en)
IN (1) IN160532B (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE920732C (en) * 1942-04-23 1954-11-29 Siemens Ag Contact arrangement for electrical switches, especially for tap changers that switch without current
DE1665192B1 (en) * 1968-02-15 1971-10-07 Reinhausen Maschf Scheubeck Contact arrangement for tap changer, turner or diverter on regulating transformers
NL135711C (en) * 1968-05-24

Also Published As

Publication number Publication date
DE3243834C1 (en) 1984-03-29
ES527540A0 (en) 1984-08-16
ES8407239A1 (en) 1984-08-16
KR840006723A (en) 1984-12-01
JPS59105307A (en) 1984-06-18
KR900000431B1 (en) 1990-01-30
IN160532B (en) 1987-07-18
EP0110269A1 (en) 1984-06-13
ATE19444T1 (en) 1986-05-15

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