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EP0415044B1 - Contact arrangement for tap-changers or tap transformers - Google Patents

Contact arrangement for tap-changers or tap transformers Download PDF

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Publication number
EP0415044B1
EP0415044B1 EP90113300A EP90113300A EP0415044B1 EP 0415044 B1 EP0415044 B1 EP 0415044B1 EP 90113300 A EP90113300 A EP 90113300A EP 90113300 A EP90113300 A EP 90113300A EP 0415044 B1 EP0415044 B1 EP 0415044B1
Authority
EP
European Patent Office
Prior art keywords
contact
springs
bridge housing
housing
ring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP90113300A
Other languages
German (de)
French (fr)
Other versions
EP0415044A2 (en
EP0415044A3 (en
Inventor
Rolf Lauterwald
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maschinenfabrik Reinhausen GmbH
Scheubeck GmbH and Co
Original Assignee
Maschinenfabrik Reinhausen GmbH
Maschinenfabrik Reinhausen Gebrueder Scheubeck GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Maschinenfabrik Reinhausen GmbH, Maschinenfabrik Reinhausen Gebrueder Scheubeck GmbH and Co KG filed Critical Maschinenfabrik Reinhausen GmbH
Priority to AT90113300T priority Critical patent/ATE104088T1/en
Publication of EP0415044A2 publication Critical patent/EP0415044A2/en
Publication of EP0415044A3 publication Critical patent/EP0415044A3/en
Application granted granted Critical
Publication of EP0415044B1 publication Critical patent/EP0415044B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01F29/00—Variable transformers or inductances not covered by group H01F21/00
    • H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
    • 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 for connecting a contact ring with circularly arranged step contacts according to the preamble of the first claim.
  • Such contact arrangements are already known (DE-AS 11 93 145, DE-OS 23 54 173).
  • a contact bridge is provided between a slip ring arranged concentrically around the movement axis and circularly arranged fixed step contacts, which contains two groups of contact lamellae, which are oppositely opposed to one another, which are individually movable and resiliently mounted in the contact bridge housing and each from above or below press the force of the springs to make contact onto the slip ring or the fixed step contact to be connected to it.
  • the radial distance between the slip ring and the tap changer results from the number of tap contacts and the required voltage with which the tap changer should be applied. It is therefore necessary, on the one hand, to make the contact bridges of different lengths and, on the other hand, to design the contact bridge housing differently depending on the expected voltage.
  • the known contact arrangements only insufficiently compensate for height tolerances that are unavoidable during manufacture of the step contacts, since the possible deflection of the individual contact lamellae must remain narrowly limited in order to rule out jamming of the lamellae in the contact bridge housing and jamming of the individual lamellae when running onto a step contact.
  • the invention makes it possible that only the total length of the contact lamellae must be adapted to the radial distance between the selector column and the fixed step contacts, the position and dimension of the contact pressure spring receptacle being the same regardless of the length for all contact lamellae, while that is the leading factor of the contact lamellae and holding component always the same contact frame can be used, which can advantageously be produced in a simple manner from sheet metal, especially since no electrical requirements are placed on it, since it is voltage-shielded from the two-part contact bridge housing.
  • the two-part contact bridge housing is manufactured, for example, from cast iron and is dimensioned such that it acts as an electrode and takes over the complete shielding of the entire contact arrangement.
  • the invention allows double and resilient guidance of both the contact blades in the frame and of the frame in the two-part contact bridge housing, and also larger horizontal differences between the contact ring and the individual step contacts safely and easily balance.
  • Upper contact lamellae 5.1 and lower contact lamellae 5.2 rest on both sides on the contact ring 2 and on the step contact 4 to be connected to it.
  • the pressure is applied by contact pressure springs 7, which engage in contact pressure spring receptacles 6 of the upper and lower contact plates 5.1 and 5.2 and are supported in spring abutments 9 of a surrounding contact frame 8.
  • the contact frame 8 consists of a sheet metal construction guiding the upper and lower contact plates 5.1 and 5.2 and at the same time fixing their movement with two fastening points 10.
  • the position and spacing of the contact pressure spring recesses 6 are, regardless of their length, in all contact plates 5.1 and 5.2 the same, so that the same contact frame 8 can always be used for guiding and fixing.
  • This contact frame 8 is in turn enclosed with the interposition of a frame spring 12 or also several such frame springs with play on all sides by a split contact bridge housing 14, consisting of an inner housing part 14.1 facing the selector column 1 and an outer housing part 14.2 facing the step contacts 4, the housing parts 14.1 and 14.2 are connected to one another by one or more spacer bolts 16.
  • the frame spring 12 engages in a spring guide 13 of the contact frame 8 and is supported on the other hand in a recess 15 of the corresponding housing part 14.1 or 14.2.
  • a plurality of frame springs 12 can also be arranged on the upper and lower side between the contact frame 8 and the respective housing part 14.1 or 14.2, in which case it has proven advantageous to compensate for the dead weight of the contact frame 8 and the contact plates 5.1 and 5.2 to use springs with greater spring force on the underside and / or to arrange disks 11 in the lower recesses 15 of the contact bridge housing 14.

Landscapes

  • Power Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Housings And Mounting Of Transformers (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Contacts (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Protection Of Transformers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Transformers For Measuring Instruments (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Keying Circuit Devices (AREA)
  • Connector Housings Or Holding Contact Members (AREA)

Abstract

A bridge-contact assembly used in combination with an inner contact ring and a contact terminal of an array concentrically surrounding the ring comprises a contact hoousing rotatable concentrically with and between the ring and array, a pair of bridge-contact jaws extending between the ring and the array and having inner ends gripping the ring and outer ends gripping a one of the terminals of the array, and a contact holder spacedly surrounding the pair of jaws and spacedly surrounded by the contact housing. At least one jaw spring supports the jaws in the holder and urges the jaws together and at least one holder spring supports the holder in the contact housing.

Description

Die Erfindung betrifft eine Kontaktanordnung für Stufenwähler von Stufentransformatoren zum Verbinden eines Kontaktringes mit kreisförmig angeordneten Stufenkontakten gemäß dem Oberbegriff des ersten Patentanspruches.The invention relates to a contact arrangement for step selectors of step transformers for connecting a contact ring with circularly arranged step contacts according to the preamble of the first claim.

Solche Kontaktanordnungen sind bereits bekannt (DE-AS 11 93 145, DE-OS 23 54 173). Bei diesen Kontaktanordnungen ist eine Kontaktbrücke zwischen einem konzentrisch um die Bewegungsachse angeordneten Schleifring und kreisförmig angeordneten feststehenden Stufenkontakten vorgesehen, die zwei Gruppen von Kontaktlamellen, die sich spiegelbildlich gegenüberliegen, enthält, die im Kontaktbrückengehäuse einzeln beweglich und federnd gelagert sind und jeweils von oben oder unten durch die Kraft der Federn zur Kontaktgabe auf den Schleifring bzw. den jeweils damit zu verbindenden feststehenden Stufenkontakt drücken.Such contact arrangements are already known (DE-AS 11 93 145, DE-OS 23 54 173). In these contact arrangements, a contact bridge is provided between a slip ring arranged concentrically around the movement axis and circularly arranged fixed step contacts, which contains two groups of contact lamellae, which are oppositely opposed to one another, which are individually movable and resiliently mounted in the contact bridge housing and each from above or below press the force of the springs to make contact onto the slip ring or the fixed step contact to be connected to it.

Der radiale Abstand zwischen dem Schleifring und den Stufenkontakten ergibt sich aus der Anzahl der Stufenkontakte und der geforderten Spannung, mit dem der Stufenschalter beaufschlagt werden soll. Es ist also erforderlich, einerseits die Kontaktbrücken unterschiedlich lang auszuführen und andererseits das Kontaktbrückengehäuse abhängig von der zu erwartenden Spannung konstruktiv unterschiedlich auszulegen.The radial distance between the slip ring and the tap changer results from the number of tap contacts and the required voltage with which the tap changer should be applied. It is therefore necessary, on the one hand, to make the contact bridges of different lengths and, on the other hand, to design the contact bridge housing differently depending on the expected voltage.

Dies führt zwangsläufig zu einer für die Realisierung eines Baukastensystems von Stufenschaltern unerwünschten Vielzahl unterschiedlicher Einzelteile.This inevitably leads to a large number of different individual parts which are undesirable for the implementation of a modular system of tap changers.

Weiterhin gestatten die bekannten Kontaktanordnungen nur ungenügend den Ausgleich von bei der Fertigung unvermeidlichen Höhentoleranzen der Stufenkontakte, da die mögliche Auslenkung der einzelnen Kontaktlamellen eng begrenzt bleiben muß, um ein Verkanten der Lamellen im Kontaktbrückengehäuse und ein Verklemmen der einzelnen Lamellen beim Auflaufen auf einen Stufenkontakt auszuschließen.Furthermore, the known contact arrangements only insufficiently compensate for height tolerances that are unavoidable during manufacture of the step contacts, since the possible deflection of the individual contact lamellae must remain narrowly limited in order to rule out jamming of the lamellae in the contact bridge housing and jamming of the individual lamellae when running onto a step contact.

Es ist daher Aufgabe der Erfindung, die Kontaktanordnung für Stufenwähler so zu verbessern, daß mit einem Minimum an Bauelementen die Anordnung in weiten Grenzen an unterschiedliche Strombelastungen angepaßt werden kann und ein Ausgleich von Höhentoleranzen der Stufenkontakte untereinander als auch in bezug auf den Kontaktring ohne Beeinträchtigung des Schaltverhaltens gewährleistet ist.It is therefore an object of the invention to improve the contact arrangement for step selectors so that the arrangement can be adapted within wide limits to different current loads with a minimum of components and a compensation of height tolerances of the step contacts with one another and with respect to the contact ring without affecting the Switching behavior is guaranteed.

Diese Aufgabe wird erfindungsgemäß durch die im Patentanspruch 1 dargestellten Mittel gelöst.This object is achieved by the means shown in claim 1.

Durch die Erfindung wird es möglich, daß lediglich die Kontaktlamellen in ihrer Gesamtlänge an den radialen Abstand zwischen Wählersäule und den feststehenden Stufenkontakten angepaßt werden müssen, wobei Lage und Abmessung der Kontaktdruckfederaufnahme unabhängig von der Länge bei allen Kontaktlamellen gleich sind, während als das die Kontaktlamellen führendes und haltendes Bauteil stets der gleiche Kontaktrahmen verwendet werden kann, der vorteilhafterweise auf einfache Art und Weise aus Blech herstellbar ist, zumal an ihn keine elektrischen Anforderungen gestellt werden, da er vom zweigeteilten Kontaktbrückengehäuse spannungsmäßig abgeschirmt wird. Das zweigeteilte Kontaktbrückengehäuse wird beispielsweise aus Guß hergestellt und so dimensioniert, daß es als Elektrode wirksam ist und die vollständige Abschirmung der gesamten Kontaktanordnung übernimmt.The invention makes it possible that only the total length of the contact lamellae must be adapted to the radial distance between the selector column and the fixed step contacts, the position and dimension of the contact pressure spring receptacle being the same regardless of the length for all contact lamellae, while that is the leading factor of the contact lamellae and holding component always the same contact frame can be used, which can advantageously be produced in a simple manner from sheet metal, especially since no electrical requirements are placed on it, since it is voltage-shielded from the two-part contact bridge housing. The two-part contact bridge housing is manufactured, for example, from cast iron and is dimensioned such that it acts as an electrode and takes over the complete shielding of the entire contact arrangement.

Weiterhin gestattet es die Erfindung durch die doppelte federelastische Führung sowohl der Kontaktlamellen im Rahmen als auch des Rahmens im zweigeteilten Kontaktbrückengehäuse, auch größere horizontale Differenzen zwischen dem Kontaktring und den einzelnen Stufenkontakten sicher und problemlos auszugleichen.Furthermore, the invention allows double and resilient guidance of both the contact blades in the frame and of the frame in the two-part contact bridge housing, and also larger horizontal differences between the contact ring and the individual step contacts safely and easily balance.

Die Erfindung soll nachstehend an einem Ausführungsbeispiel näher erläutert werden

Fig. 1
zeigt die erfindungsgemäße Kontaktanordnung in vertikaler Schnittdarstellung
Fig. 2
zeigt die gleiche Anordnung mit einer anderen Schnittebene
Bei einem gattungsgemäßen Stufenwähler eines Stufentransformators befindet sich die Wählersäule 1 mit einem konzentrisch hierzu um diese herum angeordneten Kontaktring 2 im Inneren eines Isolierstoffzylinders 3, der in mindestens einer Ebene kreisförmig angeordnete feststehende Stufenkontakte 4 aufweist.The invention will be explained in more detail below using an exemplary embodiment
Fig. 1
shows the contact arrangement according to the invention in a vertical sectional view
Fig. 2
shows the same arrangement with a different section plane
In a generic step selector of a step transformer, the selector column 1 with a contact ring 2 arranged concentrically around it is located inside an insulating material cylinder 3, which has fixed step contacts 4 arranged in a circle in at least one plane.

Obere Kontaktlamellen 5.1 sowie untere Kontaktlamellen 5.2 liegen beidseitig sowohl am Kontaktring 2 als auch am jeweils mit diesem zu verbindenden Stufenkontakt 4 an. Der Andruck erfolgt dabei durch Kontaktdruckfedern 7, die in Kontaktdruckfederaufnahmen 6 der oberen als auch der unteren Kontaktlamellen 5.1 und 5.2 eingreifen und sich in Federwiderlagern 9 eines umgebenden Kontaktrahmens 8 abstützen. Der Kontaktrahmen 8 besteht dabei aus einer die oberen und unteren Kontaktlamellen 5.1 und 5.2 führenden und gleichzeitig in ihrer Bewegung fixierenden Blechkonstruktion mit zwei Befestigungspunkten 10. Lage und Abstand der Kontaktdruckfederaussparungen 6 sind dabei, unabhängig von deren Länge, bei allen zum Einsatz kommenden Kontaktlamellen 5.1 und 5.2 gleich, so daß zur Führung und Fixierung stets der gleiche Kontaktrahmen 8 Verwendung finden kann. Dieser Kontaktrahmen 8 wiederum ist unter Zwischenlage einer Rahmenfeder 12 oder auch mehrerer solcher Rahmenfedern mit allseitigem Spiel von einem geteilten Kontaktbrückengehäuse 14, bestehend aus innerem, der Wählersäule 1 zugewandten Gehäuseteil 14.1 und äußerem, zu den Stufenkontakten 4 gerichteten Gehäuseteil 14.2, umschlossen, wobei die Gehäuseteile 14.1 und 14.2 durch einen oder mehrere Distanzbolzen 16 miteinander verbunden sind.Upper contact lamellae 5.1 and lower contact lamellae 5.2 rest on both sides on the contact ring 2 and on the step contact 4 to be connected to it. The pressure is applied by contact pressure springs 7, which engage in contact pressure spring receptacles 6 of the upper and lower contact plates 5.1 and 5.2 and are supported in spring abutments 9 of a surrounding contact frame 8. The contact frame 8 consists of a sheet metal construction guiding the upper and lower contact plates 5.1 and 5.2 and at the same time fixing their movement with two fastening points 10. The position and spacing of the contact pressure spring recesses 6 are, regardless of their length, in all contact plates 5.1 and 5.2 the same, so that the same contact frame 8 can always be used for guiding and fixing. This contact frame 8 is in turn enclosed with the interposition of a frame spring 12 or also several such frame springs with play on all sides by a split contact bridge housing 14, consisting of an inner housing part 14.1 facing the selector column 1 and an outer housing part 14.2 facing the step contacts 4, the housing parts 14.1 and 14.2 are connected to one another by one or more spacer bolts 16.

Die Rahmenfeder 12 greift jeweils in eine Federführung 13 des Kontaktrahmens 8 ein und stützt sich andererseits in einer Aussparung 15 des entsprechenden Gehäuseteils 14.1 bzw. 14.2 ab.The frame spring 12 engages in a spring guide 13 of the contact frame 8 and is supported on the other hand in a recess 15 of the corresponding housing part 14.1 or 14.2.

Es können auch mehrere Rahmenfedern 12 an der oberen und unteren Seite zwischen dem Kontaktrahmen 8 und dem jeweiligen Gehäuseteil 14.1 bzw. 14.2 angeordnet sein, wobei es sich in diesem Fall zum Ausgleich des Eigengewichts von Kontaktrahmen 8 und den Kontaktlamellen 5.1 und 5.2 als vorteilhaft erwiesen hat, an der Unterseite jeweils Federn mit größerer Federkraft zu verwenden und/oder Scheiben 11 in den unteren Aussparungen 15 des Kontaktbrückengehäuses 14 anzuordnen.A plurality of frame springs 12 can also be arranged on the upper and lower side between the contact frame 8 and the respective housing part 14.1 or 14.2, in which case it has proven advantageous to compensate for the dead weight of the contact frame 8 and the contact plates 5.1 and 5.2 to use springs with greater spring force on the underside and / or to arrange disks 11 in the lower recesses 15 of the contact bridge housing 14.

Durch diese Maßnahmen wird das Eigengewicht der Kontaktlamellen 5 bzw. des Kontaktrahmens 8 ausgeglichen, so daß vertikal annähernd der gleiche Auslenkweg nach oben als auch nach unten zum Toleranzausgleich vorhanden ist.These measures compensate for the dead weight of the contact lamellae 5 or the contact frame 8, so that there is approximately the same vertical deflection upwards and downwards for tolerance compensation.

Dabei ist es vorteilhaft, wenn die Rahmenfedern 12 als solche gegenüber den Kontaktdruckfedern 7 eine höhere Federkraft aufweisen.It is advantageous if the frame springs 12 as such have a higher spring force than the contact pressure springs 7.

Claims (2)

  1. Contact arrangement for the selectors of tapped transformers, for the connecting of a contact ring (2), which is arranged circularly around a selector column (1), with fixed tap contacts (4), which are arranged in a concentric circle thereto, wherein a contact bridge housing (14), which is rigidly connected with a drive tube rotatable about the selector column, is provided and comprises two groups of contact plates (5.1, 5.2), which are disposed opposite one another in mirror image and resiliently mounted in the contact bridge housing by means of contact springs (7, 12) to be individually movable and which press downwardly and upwardly by their ends against the slip ring (2) on the one hand and the respective tap contact (4), which is to be connected therewith, on the other hand, characterised thereby that arranged around the contact plates (5) is a contact frame (8), which has a spring counterbearing (9) for the reception of the contact pressure springs (7) resting against the contact plates (5) and in turn is movably guided by means of frame springs (12) in the contact bridge housing (14) with play at all sides and enclosed by the housing, wherein the contact bridge housing (14) is divided transversely to the radial extent of the contact plates (5) into an inner contact bridge housing (14.1) and an outer contact bridge housing (14.2), which are connectible by means of one or more spacer bolts (16).
  2. Contact arrangement according to claim 1, characterised thereby that the lower contact pressure springs (7) and/or the lower frame springs (12) are additionally biassed relative to the upper springs by washes (11; 17).
EP90113300A 1989-08-28 1990-07-12 Contact arrangement for tap-changers or tap transformers Expired - Lifetime EP0415044B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90113300T ATE104088T1 (en) 1989-08-28 1990-07-12 CONTACT ARRANGEMENT FOR TAP SELECTORS OF TAP TRANSFORMERS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3928359 1989-08-28
DE3928359A DE3928359C1 (en) 1989-08-28 1989-08-28

Publications (3)

Publication Number Publication Date
EP0415044A2 EP0415044A2 (en) 1991-03-06
EP0415044A3 EP0415044A3 (en) 1991-12-27
EP0415044B1 true EP0415044B1 (en) 1994-04-06

Family

ID=6388010

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90113300A Expired - Lifetime EP0415044B1 (en) 1989-08-28 1990-07-12 Contact arrangement for tap-changers or tap transformers

Country Status (10)

Country Link
US (1) US5034578A (en)
EP (1) EP0415044B1 (en)
JP (1) JP3037981B2 (en)
KR (1) KR0142183B1 (en)
AT (1) ATE104088T1 (en)
BG (1) BG51369A3 (en)
DE (1) DE3928359C1 (en)
ES (1) ES2050890T3 (en)
HU (1) HU207603B (en)
RO (1) RO109016B1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE500609C2 (en) * 1992-07-09 1994-07-25 Asea Brown Boveri Tap changer
DE19836463C1 (en) * 1998-08-12 1999-10-21 Reinhausen Maschf Scheubeck Electric stepping switch for stepping transformer
CN1279308C (en) * 2001-01-12 2006-10-11 申正勋 Equipment for highly mounted lamp having ascending and descending function
DE10312176B3 (en) * 2003-03-19 2004-06-09 Maschinenfabrik Reinhausen Gmbh Load switch for stepping switch with 2 fixed main contact pairs for each current phase to be switched and cooperating movable main contact
DE102005027524B3 (en) * 2005-06-15 2006-10-12 Maschinenfabrik Reinhausen Gmbh Power accumulator for on-load tap changer, has lift and leaping carriages with three linear bearings, and cam follower coinciding with actuator such that leaping carriage is pushed into new final position by rotation of eccentric plate
DE102007023124B3 (en) * 2007-05-16 2008-10-02 Maschinenfabrik Reinhausen Gmbh switching arrangement
US8207457B2 (en) * 2008-12-29 2012-06-26 Abb Technology Ag Reversing and a method of modifying a tap changer to use the same
DE102011008702B4 (en) * 2011-01-15 2015-01-08 Maschinenfabrik Reinhausen Gmbh Tap changer with a selection
WO2012134963A1 (en) * 2011-03-25 2012-10-04 Abb Technology Ag Tap changer having an improved vacuum interrupter actuating assembly
EP3098824B1 (en) * 2015-05-27 2018-03-07 ABB Schweiz AG A contact unit for a tap changer and a tap selector comprising the contact unit

Family Cites Families (13)

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Publication number Priority date Publication date Assignee Title
AT162527B (en) * 1947-01-08 1949-03-10 Elin Ag Elek Ind Wien Step control device for transformers
AT199759B (en) * 1955-04-18 1958-09-25 Elin Ag Elek Ind Wien Step selector for regulating transformers
NL94688C (en) * 1958-05-02 1960-06-15
US3045090A (en) * 1959-05-08 1962-07-17 Mc Graw Edison Co Tap changer movable contact
DE1102243B (en) * 1959-08-03 1961-03-16 Licentia Gmbh Slidable contact bridge under spring force with protruding support points
US3137778A (en) * 1962-04-16 1964-06-16 Gen Electric Pivotally mounted disconnect switch contacts
NL296146A (en) * 1962-08-03
US3192328A (en) * 1963-02-01 1965-06-29 Mc Graw Edison Co Movable switch contact assembly with self-aligning bridging plate members
US3678237A (en) * 1971-01-18 1972-07-18 Ite Imperial Corp Self-aligning jaw contact
DE2354173A1 (en) * 1973-10-30 1975-05-07 Transformatoren Union Ag Contact arrangement for selector or commutator in step switches - uses spring contact elements of equal size for contacts and collector for all switch sizes
EP0185119A1 (en) * 1984-12-17 1986-06-25 ATELIERS DE CONSTRUCTIONS ELECTRIQUES DE CHARLEROI (ACEC) Société Anonyme Load-breaking module with contact clamps for an on-load tap selector
DD234115A1 (en) * 1985-01-11 1986-03-19 Liebknecht Transformat CONTACT ARRANGEMENT FOR CONTROL UNITS OF TRANSFORMERS
DE3827385A1 (en) * 1988-08-12 1990-02-15 Reinhausen Maschf Scheubeck CYLINDRICAL LEVEL SELECTOR WITH CONTACT BRIDGE GUIDED BY A BRACKET OF INSULATING MATERIAL

Also Published As

Publication number Publication date
HU905326D0 (en) 1991-02-28
JP3037981B2 (en) 2000-05-08
DE3928359C1 (en) 1991-01-24
US5034578A (en) 1991-07-23
EP0415044A2 (en) 1991-03-06
EP0415044A3 (en) 1991-12-27
ATE104088T1 (en) 1994-04-15
ES2050890T3 (en) 1994-06-01
KR910005339A (en) 1991-03-30
BG51369A3 (en) 1993-04-15
KR0142183B1 (en) 1998-07-01
RO109016B1 (en) 1994-10-31
HU207603B (en) 1993-04-28
JPH0391213A (en) 1991-04-16
HUT54825A (en) 1991-03-28

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