EP0356897B1 - Cylindrical tap selector for tap transformers with an insulating bearing assembly for driving shafts - Google Patents

Cylindrical tap selector for tap transformers with an insulating bearing assembly for driving shafts Download PDF

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Publication number
EP0356897B1
EP0356897B1 EP89115531A EP89115531A EP0356897B1 EP 0356897 B1 EP0356897 B1 EP 0356897B1 EP 89115531 A EP89115531 A EP 89115531A EP 89115531 A EP89115531 A EP 89115531A EP 0356897 B1 EP0356897 B1 EP 0356897B1
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EP
European Patent Office
Prior art keywords
insulating material
cylinder
bearing
rods
wall
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
EP89115531A
Other languages
German (de)
French (fr)
Other versions
EP0356897A3 (en
EP0356897A2 (en
Inventor
Alexander Bleibtreu
Leo Ing.(Grad.) Pillmeier
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 AT89115531T priority Critical patent/ATE103733T1/en
Publication of EP0356897A2 publication Critical patent/EP0356897A2/en
Publication of EP0356897A3 publication Critical patent/EP0356897A3/en
Application granted granted Critical
Publication of EP0356897B1 publication Critical patent/EP0356897B1/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
    • 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

Definitions

  • the invention relates to a cylindrical step selector for step transformers according to the preamble of claim 1.
  • Such step selectors are known: AT-C 162 527, EP-A-0 103 299.
  • AT-C 162 527 AT-C 162 527
  • AT-C 162 527 AT-C 162 527
  • AT-C 162 527 AT-C 162 527
  • they have hardly become established in practice because it is difficult to here to achieve a satisfactory stable design and arrangement of the bearing of the drive shaft using only insulating material parts.
  • the advantage achieved with the invention lies essentially in the consequent avoidance of metallic fastening parts as well as in a secure centering of the bearing and, above all, in great stability.
  • the latter is achieved by using tubular rods as struts, for example wound GRP material, which due to their great mechanical strength can also be easily wedged both in the wall of the insulating material cylinder and in the bearing block.
  • the fixation of the bearing can be done here by the fact that two rods cross the bushing in different planes.
  • the ends of the rods stuck in the wall of the insulating material cylinder are slotted and widened by wedges driven in from the outside, so that they sit firmly in the wall of the insulating cylinder.
  • a transverse pin resting against the inside of the wall can be provided or special spacer tubes can be pushed onto the rods.
  • the bearing bush can expediently be placed on an insulating material block, the insulating material block being provided with bores through which the rods are inserted.
  • the insulating material block being provided with bores through which the rods are inserted.
  • two rods lying parallel in one plane can also be used.
  • a particularly stable design is obtained when two and two parallel bars cross each other on different levels.
  • the bearing bush 2 which is arranged centrally in the insulating material cylinder 1, is held by means of two tubular rods 3, 4 arranged in a crosswise manner and made of wound insulating material.
  • Each rod 3 or 4 is in a bore 5 or 6 of the bearing bush 2, in different planes.
  • the ends 7, 8 of the rods 3, 4 are in corresponding bores, which are provided in the wall of the insulating cylinder 1.
  • the ends 7, 8 of the tubular rods 3, 4 are provided with slots 9, and they are further widened by driven wedges 11 so that they sit firmly and immovably in the wall of the insulating cylinder 1.
  • the wedges 11 are secured against slipping out by cams 13 (see also FIGS. 4 and 5).
  • the actual bearing bushing 21 is part of a special insulating block 22.
  • This insulating block 22 is provided with two parallel bores 23, 24 which run laterally past the actual bearing bushing 21, so that the insulating block 22 and thus the bearing bushing 21 are by means of two parallel tubular rods 31, 41 can be fixed.
  • spacer tubes 25, 26 are pushed over the rods 31, 41. They rest on the insulating material block 22 and on the wall of the insulating material cylinder 1 and at the same time also contribute to the stabilization of the insulating material cylinder 1.
  • the ends 7 of the rods 31, 41 are fastened in the same way as described above.
  • the bearing bush 21 is in turn part of a special insulating block 27, which in this case, however, has two intersecting parallel bores 28, 29 through which two parallel intersecting rods 32, 33 and 34, 35 are inserted .
  • the two parallel rods 32, 33 are of course in a different plane than the other two rods 34, 35. It can be easily seen that this somewhat complex design also leads to a high stability of the insulating cylinder 1.
  • FIG. 4 shows how the tubular rod 3 seated in the wall of the insulating cylinder 1 is fastened. It is provided with a slot 9 so that the end 7 can be widened. A wedge 11 is driven in from the outside, which engages by means of cams 13 in corresponding recesses 14 of the rod 3 and is prevented from slipping out. In order to avoid deformation of the insulating material cylinder 1, a spacer tube 26 is pushed over the rod 3, which rests on the one hand on the bearing (not shown here) and on the other hand on the wall of the insulating material cylinder 1.
  • a cross pin 37 made of insulating material is provided, which abuts the inside of the wall of the insulating material cylinder 1 and thus contributes to a firm anchoring of the rod 3 in the wall of the insulating material cylinder.
  • the end 7 of the rod 3 is again provided with a slot 9 and expanded by means of a wedge 11.
  • the cross pin 37 is prevented from falling out by means of a recess 38.
  • the lower end of the insulating cylinder 1 described here can also be designed as an independent insulating ring, which is then attached to the actual cylindrical body of the step selector at the bottom.
  • bearing journals can be used, on which the e.g. tubular drive shaft is placed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulators (AREA)
  • Insulating Bodies (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
  • Valve Device For Special Equipments (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Mounting Of Bearings Or Others (AREA)
  • Transformer Cooling (AREA)
  • Housings And Mounting Of Transformers (AREA)
  • Mechanical Optical Scanning Systems (AREA)

Abstract

A cylinder of electrically insulating material provided with a plurality of stationary contacts has a shaft rotatably disposed therein about an axis of the cylinder and is formed with movable contact members engageable with the contacts, and a bearing assembly in which the shaft is journaled on the cylinder at least at one end thereof, the bearing assembly including at least two tubes of electrically insulating material traversing the wall of the cylinder at opposite sides thereof so that opposite ends of the tubes project beyond the cylinder, the projecting ends of the tubes having slits formed therein, and a bearing member of electrically insulating material supported centrally and nonrotatably by the tubes and supporting the shaft for relative rotation of the shaft and the bearing member, and respective wedges received in the slits for spreading the split ends of the tubes to anchor the tubes at the wall of the cylinder.

Description

Die Erfindung bezieht sich auf einen zylindrischen Stufenwähler für Stufentransformatoren gemäß Oberbegriff des Patentanspruches 1. Derartige Stufenwähler sind bekannt: AT-C 162 527, EP-A-0 103 299. Sie haben sich in der Praxis jedoch kaum durchgesetzt, da es schwierig ist, hier unter ausschließlicher Verwendung von Isolierstoffteilen zu einer zufriedenstellenden stabilen Ausführung und Anordnung des Lagers der Antriebswelle zu gelangen.The invention relates to a cylindrical step selector for step transformers according to the preamble of claim 1. Such step selectors are known: AT-C 162 527, EP-A-0 103 299. However, they have hardly become established in practice because it is difficult to here to achieve a satisfactory stable design and arrangement of the bearing of the drive shaft using only insulating material parts.

Es ist deshalb Aufgabe der Erfindung, den eingangs genannten Stufenwähler so weiterzuentwickeln, daß unter Verzicht auf jegliche metallische Konstruktionsteile eine einfache und feste Zentrierung des Lagers mit gleichzeitiger Stabilisierung des Zylinders erreicht wird. Diese Aufgabe wird erfindungsgemäß durch die im Kennzeichen des Patentanspruches 1 angegebenen Mittel gelöst.It is therefore an object of the invention to develop the step selector mentioned at the outset in such a way that a simple and firm centering of the bearing with simultaneous stabilization of the cylinder is achieved without any metallic structural parts. This object is achieved by the means specified in the characterizing part of patent claim 1.

Der mit der Erfindung erzielte Vorteil liegt im wesentlichen in der konsequenten Vermeidung von metallischen Befestigungsteilen sowie in einer sicheren Zentrierung des Lagers und vor allem auch in einer großen Stabilität. Letzteres wird erreicht, indem als Streben rohrförmige Stangen, also z.B. gewickeltes GFK-Material, Verwendung finden, die sich auf Grund ihrer großen mechanischen Festigkeit auch leicht sowohl in der Wand des Isolierstoffzylinders wie auch im Lagerklotz verkeilen lassen. Die Fixierung des Lagers kann hierbei schon allein dadurch erfolgen, daß zwei Stangen die Lagerbuchse über Kreuz in unterschiedlichen Ebenen durchdringen. Die in der Wand des Isolierstoffzylinders steckenden Enden der Stangen werden geschlitzt und durch von außen eingetriebene Keile aufgeweitet, so daß sie jeweils fest in der Wand des Isolierstoffzylinders sitzen. Um hierbei ein Ausweichen der Wand des Isolierstoffzylinders zu vermeiden, kann ein an der Innenseite der Wand anliegender Querstift vorgesehen werden oder es können auf die Stangen besondere Distanzrohre geschoben werden.The advantage achieved with the invention lies essentially in the consequent avoidance of metallic fastening parts as well as in a secure centering of the bearing and, above all, in great stability. The latter is achieved by using tubular rods as struts, for example wound GRP material, which due to their great mechanical strength can also be easily wedged both in the wall of the insulating material cylinder and in the bearing block. The fixation of the bearing can be done here by the fact that two rods cross the bushing in different planes. The ends of the rods stuck in the wall of the insulating material cylinder are slotted and widened by wedges driven in from the outside, so that they sit firmly in the wall of the insulating cylinder. In order to prevent the wall of the insulating material cylinder from escaping, a transverse pin resting against the inside of the wall can be provided or special spacer tubes can be pushed onto the rods.

In zweckmäßiger Weise kann die Lagerbuchse auf einem Isolierstoffklotz aufgesetzt sein, wobei der Isolierstoffklotz mit Bohrungen versehen ist, durch welche die Stangen gesteckt sind. In diesem Fall können auch zwei in einer Ebene parallelliegende Stangen Verwendung finden. Eine besonders stabile Ausführung erhält man dabei, wenn sich jeweils zwei und zwei parallele Stangen in unterschiedlichen Ebenen kreuzen.The bearing bush can expediently be placed on an insulating material block, the insulating material block being provided with bores through which the rods are inserted. In this case, two rods lying parallel in one plane can also be used. A particularly stable design is obtained when two and two parallel bars cross each other on different levels.

Mehrere Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und werden nachstehend näher beschrieben, wobei jeweils lediglich die Anordnung des Lagers im unteren Bereich des Stufenwählers bzw. des Isolierstoffzylinders dargestellt ist. Es zeigen:

Fig. 1a und 1b
eine Ausführung mit zwei sich kreuzenden Stangen,
Fig. 2a und 2b
eine Ausführung mit zwei parallelen Stangen,
Fig. 3a und 3b
eine Ausführung mit kreuzweise angeordneten parallelen Stangen,
Fig. 4 und Fig. 5
je eine Befestigung einer Stange in der Wand des Isolierstoffzylinders.
Several exemplary embodiments of the invention are shown in the drawing and are described in more detail below, only the arrangement of the bearing in the lower region of the step selector or the insulating material cylinder being shown. Show it:
1a and 1b
a version with two crossing bars,
2a and 2b
a version with two parallel rods,
3a and 3b
a version with parallel bars arranged crosswise,
4 and 5
One rod each in the wall of the insulating cylinder.

Gemäß Figur 1a und 1b wird die zentrisch im Isolierstoffzylinder 1 angeordnete Lagerbuchse 2 mittels zweier kreuzweise angeordneter rohrförmiger Stangen 3, 4 aus gewickeltem Isoliermaterial gehalten. Jede Stange 3 bzw. 4 steckt dabei in einer Bohrung 5 bzw. 6 der Lagerbuchse 2, und zwar in unterschiedlichen Ebenen.
Die Enden 7, 8 der Stangen 3, 4 stecken in entsprechenden Bohrungen, die in der Wand des Isolierstoffzylinders 1 vorgesehen sind. Die Enden 7,8 der rohrförmigen Stangen 3, 4 sind dabei mit Schlitzen 9 versehen, und sie sind ferner durch eingetriebene Keile 11 aufgeweitet, so daß sie fest und unverrückbar in der Wand des Isolierstoffzylinders 1 sitzen. Die Keile 11 sind dabei durch Nocken 13 gegen Herausrutschen gesichert (vergleiche auch Fig. 4 und Fig. 5).According to FIGS. 1a and 1b, the bearing bush 2, which is arranged centrally in the insulating material cylinder 1, is held by means of two tubular rods 3, 4 arranged in a crosswise manner and made of wound insulating material. Each rod 3 or 4 is in a bore 5 or 6 of the bearing bush 2, in different planes.
The ends 7, 8 of the rods 3, 4 are in corresponding bores, which are provided in the wall of the insulating cylinder 1. The ends 7, 8 of the tubular rods 3, 4 are provided with slots 9, and they are further widened by driven wedges 11 so that they sit firmly and immovably in the wall of the insulating cylinder 1. The wedges 11 are secured against slipping out by cams 13 (see also FIGS. 4 and 5).

Gemäß Figur 2a und 2b ist die eigentliche Lagerbuchse 21 Bestandteil eines speziellen Isolierstoffklotzes 22. Dieser Isolierstoffklotz 22 ist mit zwei parallelen Bohrungen 23, 24, die seitlich an der eigentlichen Lagerbuchse 21 vorbeilaufen, versehen, so daß der Isolierstoffklotz 22 und damit die Lagerbuchse 21 mittels zweier parallelliegender rohrförmiger Stangen 31, 41 fixiert werden kann. Um ein seitliches Ausweichen des Isolierstoffklotzes 22 zu vermeiden, sind über die Stangen 31, 41 Distanzrohre 25, 26 geschoben. Sie liegen am Isolierstoffklotz 22 und an der Wand des Isolierstoffzylinders 1 an und tragen gleichzeitig auch zur Stabilisierung des Isolierstoffzylinders 1 bei. Die Befestigung der Enden 7 der Stangen 31, 41 erfolgt dabei auf dieselbe Art wie zuvor beschrieben.According to Figures 2a and 2b, the actual bearing bushing 21 is part of a special insulating block 22. This insulating block 22 is provided with two parallel bores 23, 24 which run laterally past the actual bearing bushing 21, so that the insulating block 22 and thus the bearing bushing 21 are by means of two parallel tubular rods 31, 41 can be fixed. In order to avoid lateral deflection of the insulating material block 22, spacer tubes 25, 26 are pushed over the rods 31, 41. They rest on the insulating material block 22 and on the wall of the insulating material cylinder 1 and at the same time also contribute to the stabilization of the insulating material cylinder 1. The ends 7 of the rods 31, 41 are fastened in the same way as described above.

Gemäß Figur 3a und 3b ist die Lagerbuchse 21 wiederum Bestandteil eines speziellen Isolierstoffklotzes 27, der in diesem Fall jedoch je zwei sich kreuzende parallele Bohrungen 28, 29 aufweist, durch die je zwei parallel verlaufende sich kreuzende Stangen 32, 33 und 34, 35 gesteckt sind. Die beiden parallelen Stangen 32, 33 liegen dabei natürlich in einer anderen Ebene als die beiden anderen Stangen 34, 35. Es ist ohne weiteres einzusehen, daß diese etwas aufwendige Ausführung zu einer hohen Stabilität auch des Isolierstoffzylinders 1 führt.According to FIGS. 3a and 3b, the bearing bush 21 is in turn part of a special insulating block 27, which in this case, however, has two intersecting parallel bores 28, 29 through which two parallel intersecting rods 32, 33 and 34, 35 are inserted . The two parallel rods 32, 33 are of course in a different plane than the other two rods 34, 35. It can be easily seen that this somewhat complex design also leads to a high stability of the insulating cylinder 1.

Aus Figur 4 ist ersichtlich, wie die in der Wand des Isolierstoffzylinders 1 sitzende rohrförmige Stange 3 befestigt ist. Sie ist mit einem Schlitz 9 versehen, so daß das Ende 7 aufgeweitet werden kann. Von außen ist ein Keil 11 eingetrieben, der mittels Nocken 13 in entsprechende Ausnehmungen 14 der Stange 3 eingreift und so am Herausrutschen gehindert ist. Um ein Verformen des Isolierstoffzylinders 1 zu vermeiden, ist über die Stange 3 ein Distanzrohr26 geschoben, welches einerseits am hier nicht dargestellten Lager und andererseits an der Wand des Isolierstoffzylinders 1 anliegt.FIG. 4 shows how the tubular rod 3 seated in the wall of the insulating cylinder 1 is fastened. It is provided with a slot 9 so that the end 7 can be widened. A wedge 11 is driven in from the outside, which engages by means of cams 13 in corresponding recesses 14 of the rod 3 and is prevented from slipping out. In order to avoid deformation of the insulating material cylinder 1, a spacer tube 26 is pushed over the rod 3, which rests on the one hand on the bearing (not shown here) and on the other hand on the wall of the insulating material cylinder 1.

Gemäß Figur 5 ist an Stelle eines Distanzrohres ein Querstift 37 aus Isolierstoff vorgesehen, der an der Innenseite der Wand des Isolierstoffzylinders 1 anliegt und so zu einer festen Verankerung der Stange 3 in der Wand des Isolierstoffzylinders beiträgt. Selbstverständlich ist auch hier das Ende 7 der Stange 3 wiederum mit einem Schlitz 9 versehen und mittels Keil 11 aufgeweitet. Der Querstift 37 ist mittels Aussparung 38 am Herausfallen gehindert.According to FIG. 5, instead of a spacer tube, a cross pin 37 made of insulating material is provided, which abuts the inside of the wall of the insulating material cylinder 1 and thus contributes to a firm anchoring of the rod 3 in the wall of the insulating material cylinder. Of course, the end 7 of the rod 3 is again provided with a slot 9 and expanded by means of a wedge 11. The cross pin 37 is prevented from falling out by means of a recess 38.

Erwähnt sei noch, daß das hier beschriebene untere Ende des Isolierstoffzylinders 1 auch als eigenständiger Isolierstoffring ausgeführt werden kann, der dann unten an den eigentlichen zylindrischen Körper des Stufenwählers angefügt wird. Selbstverständlich können auch anstelle der in den Figuren dargestellten Lagerbuchsen Lagerzapfen verwendet werden, auf die dann die z.B. rohrförmig ausgebildete Antriebswelle aufgesetzt wird.It should also be mentioned that the lower end of the insulating cylinder 1 described here can also be designed as an independent insulating ring, which is then attached to the actual cylindrical body of the step selector at the bottom. Of course, instead of the bearing bushes shown in the figures, bearing journals can be used, on which the e.g. tubular drive shaft is placed.

Claims (6)

  1. Cylindrical tap selector for tapped transformers, in which fixed contacts, which are arranged circularly in several planes, are seated in the wall of an insulating material cylinder (1) and in which the drive shaft for the movable contacts is mounted at its lower end in a bearing (2, 21) of insulating material, wherein the bearing is fastened at the lower end of the insulating material cylinder by means of stays of insulating material, characterised thereby that the stays are constructed as tubular rods (3, 4, 31, 41, 32, 33, 34, 35), which extend transversely to the longitudinal extent of the insulating material cylinder (1) and which penetrate not only the bearing (2, 21) but also, by their two ends (7, 8), the wall of the insulating material cylinder (1), wherein the two ends of each rod are slotted (9) and wedged with the wall of the insulating material cylinder.
  2. Cylindrical tap selector according to claim 1, characterised thereby that the bearing is constructed as a simple bush (2) and the two rods (3, 4) are present in different planes of the cylinder, which planes intersect at the cylinder axis.
  3. Cylindrical tap selector according to claim 1, characterised thereby that the bearing consists of an insulating material block (22) with a bearing bush (21) placed thereon and that two parallelly extending rods (31, 41), which lie in the same cylinder plane and penetrate the insulating material block, are present.
  4. Cylindrical tap selector according to claim 1, characterised thereby that the bearing consists of an insulating material block (27) with a bearing bush (21) placed thereon and that four rods (32 to 35) are present, which lie parallel in pairs in two planes, wherein one pair (32, 33) is displaced through 90° relative to the other pair (34, 35).
  5. Cylindrical tap selector according to one of the preceding claims, characterised thereby that the rods (3, 4, 32 to 35) are provided with transverse pins (37) of insulating material which bear against the inner wall of the insulating material cylinder (1).
  6. Cylindrical tap selector according to one of claims 1 to 4, characterised thereby that spacer tubes (25, 26) are provided on the rods (31, 41) between bearing bush or block (22) and wall of the insulating material cylinder (1).
EP89115531A 1988-08-31 1989-08-23 Cylindrical tap selector for tap transformers with an insulating bearing assembly for driving shafts Expired - Lifetime EP0356897B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89115531T ATE103733T1 (en) 1988-08-31 1989-08-23 CYLINDRICAL TAP SELECTOR FOR TAP TRANSFORMERS WITH INSULATED BEARING FOR DRIVE SHAFT.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3829489A DE3829489C2 (en) 1988-08-31 1988-08-31 Cylindrical step selector for step transformers
DE3829489 1988-08-31

Publications (3)

Publication Number Publication Date
EP0356897A2 EP0356897A2 (en) 1990-03-07
EP0356897A3 EP0356897A3 (en) 1991-05-15
EP0356897B1 true EP0356897B1 (en) 1994-03-30

Family

ID=6361947

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89115531A Expired - Lifetime EP0356897B1 (en) 1988-08-31 1989-08-23 Cylindrical tap selector for tap transformers with an insulating bearing assembly for driving shafts

Country Status (8)

Country Link
US (1) US4935586A (en)
EP (1) EP0356897B1 (en)
JP (1) JP2718773B2 (en)
KR (1) KR970011189B1 (en)
CN (1) CN1015287B (en)
AT (1) ATE103733T1 (en)
DE (2) DE3829489C2 (en)
ES (1) ES2050742T3 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4141142C1 (en) * 1991-12-13 1993-04-08 Maschinenfabrik Reinhausen Gmbh, 8400 Regensburg, De
KR20010039142A (en) * 1999-10-29 2001-05-15 김명철 Composition with Good Vapor Permeability and Film Properties to Preserve Freshness and Plastic Film Prepared by Using the Same
ITVI20040307A1 (en) * 2004-12-27 2005-03-27 Comem Spa SWITCH WITHOUT VOLTAGE WITH MANEUVER FOR ELECTRIC TRANSFORMERS
US8207457B2 (en) * 2008-12-29 2012-06-26 Abb Technology Ag Reversing and a method of modifying a tap changer to use the same
CN107869519A (en) * 2016-09-27 2018-04-03 天津启星动力科技有限公司 Bearing holder (housing, cover)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB296681A (en) * 1927-03-01 1928-09-03 Edouard Fries Improvements in and relating to tapping switches or ratio-adjusting devices for electrical transformers
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
DE7114665U (en) * 1971-04-17 1971-07-22 Maschinenfabrik Gebr Scheubeck Kg CYLINDRICAL OIL VESSEL FOR TAP SWITCH FOR CONTROL TRANSFORMERS
DE2845463C3 (en) * 1978-10-19 1982-02-25 Maschinenfabrik Reinhausen Gebrüder Scheubeck GmbH & Co KG, 8400 Regensburg Load selector for step transformers
DE3234213C2 (en) * 1982-09-15 1985-10-17 Maschinenfabrik Reinhausen Gebrüder Scheubeck GmbH & Co KG, 8400 Regensburg Cylindrical oil compartment for tap changers of tap transformers

Also Published As

Publication number Publication date
ES2050742T3 (en) 1994-06-01
EP0356897A3 (en) 1991-05-15
CN1040884A (en) 1990-03-28
DE3829489C2 (en) 1993-11-18
KR970011189B1 (en) 1997-07-08
CN1015287B (en) 1992-01-01
EP0356897A2 (en) 1990-03-07
JPH02112212A (en) 1990-04-24
DE3829489A1 (en) 1990-03-01
DE58907335D1 (en) 1994-05-05
KR900003922A (en) 1990-03-27
JP2718773B2 (en) 1998-02-25
ATE103733T1 (en) 1994-04-15
US4935586A (en) 1990-06-19

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