EP0257239B1 - Tap changer for mounting in a cylindrical casing - Google Patents
Tap changer for mounting in a cylindrical casing Download PDFInfo
- Publication number
- EP0257239B1 EP0257239B1 EP87109334A EP87109334A EP0257239B1 EP 0257239 B1 EP0257239 B1 EP 0257239B1 EP 87109334 A EP87109334 A EP 87109334A EP 87109334 A EP87109334 A EP 87109334A EP 0257239 B1 EP0257239 B1 EP 0257239B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- flange
- oil vessel
- diverter switch
- cylindrical oil
- head
- 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
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/0005—Tap change devices
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/0005—Tap change devices
- H01H9/0044—Casings; Mountings; Disposition in transformer housing
- H01H2009/005—Details concerning the sealing of the oil filled casings
Definitions
- the invention relates to a tap changer according to the preamble of the claim. Such designs are required for step transformers in the so-called bell-type design.
- Such a tap changer is known from GB-A-2022930.
- the advantages achieved with the invention are in particular the following:
- the movable intermediate flange which brings about tolerance compensation is already connected at the factory by the step switch manufacturer to the cylindrical oil container of the step switch or else to the top flange, so that the O-ring seal is already inserted in the factory and not only during installation of the tap changer must be provided in the transformer. This will damage the sensitive O-ring seal avoided.
- the diverter switch insert is torsion-proof and can also be inserted axially secured in the cylindrical oil tank of the tap changer.
- the intermediate flange can be screwed to the cylindrical oil vessel of the diverter switch together with a device plate carrying the diverter switch insert.
- this requires an additional seal, it leads to a secure locking of the diverter switch insert in the conventional way.
- the intermediate flange can be screwed from below to the top flange seated on the flange opening of the transformer housing and that the cylindrical oil vessel is provided on the inside with bushing-type bushing contacts into which the diverter switch insert engages with corresponding contacts in a rotationally secure and axially fixable manner . It is possible to make do with three seals in the area of the tap changer head. However, the mechanical locking of the diverter switch insert must take place via the special bushing contacts located on the oil vessel, in that the diverter switch insert engages with its contacts in corresponding recesses in the bushing contacts.
- the tap changer shown in FIG. 1 essentially consists of a cylindrical oil tank 1 with diverter switch insert 2, a tap changer head 3 and a tap selector 4, not shown in detail, which is on the bottom 5 the cylindrical oil vessel 1 is attached.
- the cylindrical oil vessel is provided with brackets 6, which are firmly connected to a crossbar 7 attached to the transformer core.
- the tap changer head 3 in turn essentially consists of a supporting head flange 10 placed on a flange opening 8 of the transformer housing 9, which is connected to an annular intermediate flange 11 which can be displaced axially in the cylindrical oil vessel 1 and which carries the cover 12 of the tap changer head 3 on its upper side.
- the annular intermediate flange 11 is already connected to the cylindrical oil vessel 1 at the factory, and the sensitive O-ring seal 13 has thus already been inserted at the factory.
- a pin 14 seated in the cylinder wall of the oil vessel 1 engages in a groove 15 of the annular intermediate flange 11, which on the one hand prevents the intermediate flange 11 from being completely pulled out of the cylindrical oil vessel 1 and on the other hand also provides security against rotation between the annular intermediate flange 11 and the cylindrical oil vessel 1 is. It is readily apparent that for the connection to be established between the top flange 10 seated on the flange opening 8 of the transformer and the intermediate flange 11 basically only the weight of the latter has to be raised.
- the diverter switch insert 2 is inserted in the usual way.
- the diverter switch insert 2 is both secured against rotation and axially secured by the special design of the bushing contacts 16, in which the diverter switch insert engages with its contacts 17.
- the diverter switch insert 2 is namely pressed down over the pressure springs 19 acting on its base plate 18, so that the stops 20 connected to the contacts 17 are firmly anchored in the recess 21 of the bushing contact 16.
- three seals for the area of the tap changer head 3 are essentially sufficient. These are the O-ring seal 13 and the two flat seals 22, 23.
- the tap changer shown in Figure 3 is constructed analogously to the embodiment of Figure 1.
- the intermediate flange 111 is axially displaceable in the head flange 101 the tap changer head arranged.
- the pin 141 which engages in a groove 151 of the head flange 101, it is in turn secured against rotation.
- the intermediate flange 111 is connected, using its axial displaceability, to the upper end of the cylindrical oil vessel 100, which with its arms 61 is rigidly attached to the active part 7 of the transformer .
- a device plate 181 carrying the diverter switch insert is screwed tight, which leads to a secure locking of the diverter switch insert in a conventional manner.
- four seals are required in the area of the tap changer head, namely the two O-ring seals 131 and 132, which are already provided at the factory and are protected from damage during final assembly, and the two flat seals 221 and 223.
Landscapes
- Housings And Mounting Of Transformers (AREA)
- Water Treatment By Sorption (AREA)
- Insulators (AREA)
- Replacement Of Web Rolls (AREA)
Abstract
Description
Die Erfindung bezieht sich auf einen Stufenschalter gemäß Oberbegriff des Patentanspruches. Derartige Ausführungen werden für Stufentransformatoren in sogenannter Glockenkesselbauweise benötigt.The invention relates to a tap changer according to the preamble of the claim. Such designs are required for step transformers in the so-called bell-type design.
Aus der GB-A-2022930 ist ein solcher Stufenschalter bekannt.Such a tap changer is known from GB-A-2022930.
Die Schwierigkeit bei diesen Bauformen liegt in der Verbindung des Stufenschalterkopfes mit dem Transformatorengehäuse, da hier erhebliche Maßtoleranzen zu berücksichtigen sind. Neben dem Einsatz von Dichtungsmanschetten, die zwischen der Flanschöffnung im Gehäuse des Transformators und dem oberen Teil des Zylinders des Stufenschalters angeordnet werden und die größere Toleranzen ausgleichen können, hat man auch bereits zylindrische Flansche verwendet, die unter Zwischenlage einer O-Ringdichtung von der Außenseite des Transformators in den Zylinder des Stufenschalters einschiebbar sind und die so den erforderlichen Toleranzausgleich bewirken.The difficulty with these designs lies in the connection of the tap changer head to the transformer housing, since considerable dimensional tolerances must be taken into account here. In addition to the use of sealing sleeves, which are arranged between the flange opening in the housing of the transformer and the upper part of the cylinder of the tap changer and which can compensate for larger tolerances, cylindrical flanges have also been used, which are interposed with an O-ring seal from the outside of the Transformers can be inserted into the cylinder of the tap changer and thus bring about the required tolerance compensation.
Aufgabe der Erfindung ist es, für den eingangs genannten Stufenschalter eine kostengünstige und sichere, den Toleranzausgleich bewirkende Verbindung zwischen zylindrischem ölgefäß mit Lastumschalter-Einsatz und Transformatorengehäuse mit Stufenschalterkopf anzugeben. Diese Aufgabe wird erfindungsgemäß durch die im Kennzeichen des Patentanspruches 1 angegebenen Mittel gelöst.It is an object of the invention to provide an inexpensive and safe connection between the cylindrical oil vessel with diverter switch insert and the transformer housing with the tap changer head for the tap changer mentioned at the beginning. This object is achieved by the means specified in the characterizing part of
Die mit der Erfindung erzielten Vorteile sind insbesondere folgende: Der den Toleranzausgleich bewirkende verschiebbare Zwischenflansch ist bereits werkseitig vom Stufenschalterhersteller mit dem zylindrischen Ölgefäß des Stufenschalters oder aber mit dem Kopfflansch verbunden, so daß auch die O-Ringdichtung bereits werkseitig eingelegt ist und nicht erst beim Einbau des Stufenschalters in den Transformator vorgesehen werden muß. Beschädigungen der empfindlichen O-Ringdichtung werden so vermieden. Der Lastumschalter-Einsatz ist verdrehungssicher und auch axial gesichert in das zylindrische Ölgefäß des Stufenschalters einsetzbar.The advantages achieved with the invention are in particular the following: The movable intermediate flange which brings about tolerance compensation is already connected at the factory by the step switch manufacturer to the cylindrical oil container of the step switch or else to the top flange, so that the O-ring seal is already inserted in the factory and not only during installation of the tap changer must be provided in the transformer. This will damage the sensitive O-ring seal avoided. The diverter switch insert is torsion-proof and can also be inserted axially secured in the cylindrical oil tank of the tap changer.
In vorteilhafter Weise kann hierbei der Zwischenflansch zusammen mit einer den Lastumschalter-Einsatz tragenden Geräteplatte am zylindrischen Ölgefäß des Lastumschalters festschraubbar sein. Dies erfordert zwar eine zusätzliche Dichtung, führt aber zu einer sicheren Arretierung des Lastumschalter-Einsatzes auf herkömmliche Weise.Advantageously, the intermediate flange can be screwed to the cylindrical oil vessel of the diverter switch together with a device plate carrying the diverter switch insert. Although this requires an additional seal, it leads to a secure locking of the diverter switch insert in the conventional way.
Andererseits ist es aber auch möglich, daß der Zwischenflansch von unten an den auf der Flanschöffnung des Transformatorgehäuses sitzenden Kopfflansch anschraubbar ist und daß das zylindrische Ölgefäß innen mit gleitschuhartig ausgebildeten Durchführungskontakten versehen ist, in die der Lastumschalter-Einsatz mit entsprechenden Kontakten verdrehungssicher und axial fixierbar eingreift. Hierbei ist es möglich, im Bereich des Stufenschalterkopfes mit drei Dichtungen auszukommen. Allerdings muß hierbei die mechanische Arretierung des Lastumschalter-Einsatzes über die speziellen am Ölgefäß sitzenden Durchführungskontakte erfolgen, indem der Lastumschalter-Einsatz mit seinen Kontakten in entsprechende Ausnehmungen der Durchführungskontakte eingreift.On the other hand, it is also possible that the intermediate flange can be screwed from below to the top flange seated on the flange opening of the transformer housing and that the cylindrical oil vessel is provided on the inside with bushing-type bushing contacts into which the diverter switch insert engages with corresponding contacts in a rotationally secure and axially fixable manner . It is possible to make do with three seals in the area of the tap changer head. However, the mechanical locking of the diverter switch insert must take place via the special bushing contacts located on the oil vessel, in that the diverter switch insert engages with its contacts in corresponding recesses in the bushing contacts.
Zwei Ausführungsbeispiele der Efindung sind in der Zeichnung dargestellt und werden anschließend näher beschrieben. Es zeigen:
Figur 1- ein Schnittbild des Stufenschalters des ersten Ausführungsbeispiels,
Figur 2- einen Durchführungskontakt dieses Stufenschalters in perspektivischer Darstellung, und
Figur 3- ausschnittsweise ein Schnittbild des zweiten Ausführungsbeispiels.
- Figure 1
- 2 shows a sectional view of the tap changer of the first exemplary embodiment,
- Figure 2
- a feedthrough contact of this tap changer in perspective, and
- Figure 3
- sections of a sectional view of the second embodiment.
Der in Figur 1 dargestellte Stufenschalter besteht im wesentlichen aus einem zylindrischen Ölgefäß 1 mit Lastumschalter-Einsatz 2, einem Stufenschalterkopf 3 und einem im einzelnen nicht dargestellten Stufenwähler 4, der am Boden 5 des zylindrischen ölgefäßes 1 angehängt ist. Das zylindrische Ölgefäß ist mit Auslegern 6 versehen, die fest mit einer am Transformatorenkern befestigten Traverse 7 verbunden sind. Der Stufenschalterkopf 3 wiederum besteht im wesentlichen aus einem auf eine Flanschöffnung 8 des Transformatorengehäuses 9 aufgesetzten tragenden Kopfflansch 10, der mit einem ringförmigen axial im zylindrischen Ölgefäß 1 verschiebbaren Zwischenflansch 11 verbunden ist und der auf seiner Oberseite den Deckel 12 des Stufenschalterkopfes 3 trägt. Der ringförmige Zwischenflansch 11 ist bereits werkseitig mit dem zylindrischen Ölgefäß 1 verbunden, und die empfindliche O-Ringdichtung 13 wurde somit auch bereits werkseitig eingelegt. Ein in der Zylinderwand des Ölgefäßes 1 sitzender Stift 14 greift in eine Nut 15 des ringförmigen Zwischenflansches 11 ein, wodurch einerseits ein völliges Herausziehen des Zwischenflansches 11 aus dem zylindrischen Ölgefäß 1 verhindert wird und wodurch andererseits auch Verdrehungssicherheit zwischen ringförmigen Zwischenflansch 11 und zylindrischem Ölgefäß 1 gegeben ist. Es ist ohne weiteres klar, daß für die herzustellende Verbindung zwischen dem auf der Flanschöffnung 8 des Transformators sitzenden Kopfflansch 10 und dem Zwischenflansch 11 im Grunde genommen lediglich das Gewicht des letzteren anzuheben ist. Das Einsetzen des Lastumschalter-Einsatzes 2 geschieht auf übliche Art. Jedoch ist der Lastumschalter-Einsatz 2 durch die spezielle Ausführung der Durchführungskontakte 16, in welche der Lastumschalter-Einsatz mit seinen Kontakten 17 eingreift, sowohl gegen Verdrehung gesichert wie auch axial gesichert. Der Lastumschalter-Einsatz 2 wird nämlich über die auf seine Grundplatte 18 wirkenden Druckfedern 19 nach unten gedrückt, so daß die mit den Kontakten 17 verbundenen Anschläge 20 fest in der Aussparung 21 des Durchführungskontakts 16 verankert sind. Bei diesem Ausführungsbeispiel kommt man im wesentlichen mit drei Dichtungen für den Bereich des Stufenschalterkopfes 3 aus. Es sind dies die O-Ringdichtung 13 sowie die beiden Flachdichtungen 22, 23.The tap changer shown in FIG. 1 essentially consists of a
Der in Figur 3 gezeigte Stufenschalter ist analog dem Ausführungsbeispiel nach Figur 1 aufgebaut. In diesem Fall ist der Zwischenflansch 111 jedoch axial verschiebbar im Kopfflansch 101 des Stufenschalterkopfes angeordnet. Durch den Stift 141, der in eine Nut 151 des Kopfflansches 101 eingreift, ist er wiederum gegen Verdrehung gesichert. Nachdem der Kopfflansch 101 des Stufenschalterkopfes auf die entsprechende Flanschöffnung 8 des Stufentransformators aufgesetzt worden ist, wird der Zwischenflansch 111 unter Ausnutzung seiner axialen Verschiebbarkeit mit dem oberen Ende des zylindrischen Ölgefäßes 100, das ja mit seinen Auslegern 61 starr am Aktivteil 7 des Transformators sitzt, verbunden. Hierbei wird zugleich eine den Lastumschalter-Einsatz tragende Geräteplatte 181 festgeschraubt, was zu einer sicheren Arretierung des Lastumschalter-Einsatzes auf herkömmliche Weise führt. In diesem Fall sind im Bereich des Stufenschalterkopfes allerdings vier Dichtungen erforderlich, nämlich die beiden O-Ringdichtungen 131 und 132, die bereits werkseitig vorgesehen werden und vor Beschädigungen bei der Endmontage geschützt sind sowie die beiden Flachdichtungen 221 und 223.The tap changer shown in Figure 3 is constructed analogously to the embodiment of Figure 1. In this case, however, the
Es ist klar, daß bei beiden Ausführungsbeispielen durch entsprechende Toleranzen in der Kopfverschraubung 25 eine exakte Zentrierung des Stufenschalterkopfes 3 mit dem zylindrischen Ölgefäß 1 bzw. 100 erfolgt.It is clear that in both exemplary embodiments, corresponding tolerances in the
Claims (3)
- Tap-changing switch, which is rigidly connected with the active part of a tapped transformer, with a load-diverter switch, which is arranged in a cylindrical oil vessel (1, 100) and the load diverter switch insert (2) of which is fixed in the cylindrical oil vessel (1, 100), and with a head flange (10, 101), which is settable onto a corresponding flange opening (8) of the transformer and the cylindrical internal diameter of which communicates with that of the cylindrical oil vessel (1, 100), characterised thereby, that an intermediate flange (11, 111), which is displaceable in axial direction and arranged with the interposition of an O-ring seal (13, 131) loosely, but captively and secure against rotation in the cylindrical opening of the head flange (10, 101) or in the cylindrical oil vessel (1, 100) of the load diverter switch and which is screwable fast to the head flange (10, 101) or to the cylindrical oil vessel (1, 100) of the load diverter switch, is provided for the connection of the cylindrical oil vessel (1, 100) and the head flange (10, 101).
- Tap-changing switch, which is rigidly connected with the active part of a tapped transformer, according to claim 1, characterised thereby, that the intermediate flange (111), which is retained at the head part (101), together with a base plate (181) carrying the load diverter switch insert is screwable fast to the cylindrical oil vessel (100) of the load diverter switch (2).
- Tap-changing switch, which is rigidly connected with the active part of a tapped transformer, according to claim 1 is screwable fast from below to the head flange (10) sitting on the flange opening (8) of the tapped transformer and that the cylindrical oil vessel is provided at the inside with feedthrough contacts (16), which are constructed in the manner of a slide shoe and into which the load diverter switch insert (2) engages by corresponding contacts (17) to be secure against rotation and fixable axially.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT87109334T ATE67626T1 (en) | 1986-08-09 | 1987-06-29 | STEP SWITCH FOR BELL BOILER INSTALLATION. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3627028 | 1986-08-09 | ||
DE19863627028 DE3627028A1 (en) | 1986-08-09 | 1986-08-09 | STEP SWITCH FOR BELL BOILER INSTALLATION |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0257239A2 EP0257239A2 (en) | 1988-03-02 |
EP0257239A3 EP0257239A3 (en) | 1989-11-15 |
EP0257239B1 true EP0257239B1 (en) | 1991-09-18 |
Family
ID=6307042
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP87109334A Expired - Lifetime EP0257239B1 (en) | 1986-08-09 | 1987-06-29 | Tap changer for mounting in a cylindrical casing |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0257239B1 (en) |
JP (1) | JP2540163B2 (en) |
AT (1) | ATE67626T1 (en) |
DE (2) | DE3627028A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3935289A1 (en) * | 1989-10-24 | 1991-04-25 | Reinhausen Maschf Scheubeck | CYLINDRICAL LOAD SWITCH OF A STEP BY SWITCH OF STEP TRANSFORMERS |
DE10055406C1 (en) * | 2000-11-09 | 2002-04-04 | Reinhausen Maschf Scheubeck | Load switch for transformer stepping switch has parts of terminal contacts lying within oil-filled housing of load switch attached to periphery of upper mounting plate supporting load switching insert |
BG65709B1 (en) * | 2004-03-23 | 2009-07-31 | "Хюндай Хеви Индъстрис Ко. България" Ад | Vessel for power switch of a step voltage regulator |
DE202010016212U1 (en) * | 2010-11-30 | 2012-03-01 | Maschinenfabrik Reinhausen Gmbh | diverter |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE7817733U1 (en) * | 1978-06-13 | 1978-09-21 | Transformatoren Union Ag, 7000 Stuttgart | SEALING ARRANGEMENT FOR INSTALLATION TANK IN A TRANSFORMER BOILER |
DE2948111A1 (en) * | 1979-11-29 | 1981-06-04 | Maschinenfabrik Reinhausen Gebrüder Scheubeck GmbH & Co KG, 8400 Regensburg | STAGE TRANSFORMERS PROVIDED WITH OIL FILTER SYSTEM |
-
1986
- 1986-08-09 DE DE19863627028 patent/DE3627028A1/en not_active Withdrawn
-
1987
- 1987-06-29 AT AT87109334T patent/ATE67626T1/en not_active IP Right Cessation
- 1987-06-29 DE DE8787109334T patent/DE3773082D1/en not_active Expired - Fee Related
- 1987-06-29 EP EP87109334A patent/EP0257239B1/en not_active Expired - Lifetime
- 1987-08-05 JP JP62194567A patent/JP2540163B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE3627028A1 (en) | 1988-02-11 |
JP2540163B2 (en) | 1996-10-02 |
ATE67626T1 (en) | 1991-10-15 |
EP0257239A3 (en) | 1989-11-15 |
DE3773082D1 (en) | 1991-10-24 |
EP0257239A2 (en) | 1988-03-02 |
JPS6345808A (en) | 1988-02-26 |
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