EP0252400B1 - Sélecteur de charge pour transformateurs à échelons pourvu d'un sélecteur préliminaire - Google Patents

Sélecteur de charge pour transformateurs à échelons pourvu d'un sélecteur préliminaire Download PDF

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Publication number
EP0252400B1
EP0252400B1 EP87109335A EP87109335A EP0252400B1 EP 0252400 B1 EP0252400 B1 EP 0252400B1 EP 87109335 A EP87109335 A EP 87109335A EP 87109335 A EP87109335 A EP 87109335A EP 0252400 B1 EP0252400 B1 EP 0252400B1
Authority
EP
European Patent Office
Prior art keywords
selector
wall
contacts
preselector
polarity
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
EP87109335A
Other languages
German (de)
English (en)
Other versions
EP0252400A3 (en
EP0252400A2 (fr
Inventor
Dieter Dr.-Ing. Dohnal
Leo 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
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
Priority claimed from DE19863622716 external-priority patent/DE3622716A1/de
Priority claimed from DE19863644206 external-priority patent/DE3644206A1/de
Application filed by Maschinenfabrik Reinhausen GmbH filed Critical Maschinenfabrik Reinhausen GmbH
Priority to AT87109335T priority Critical patent/ATE72359T1/de
Publication of EP0252400A2 publication Critical patent/EP0252400A2/fr
Publication of EP0252400A3 publication Critical patent/EP0252400A3/de
Application granted granted Critical
Publication of EP0252400B1 publication Critical patent/EP0252400B1/fr
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
    • H01F29/04—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings having provision for tap-changing without interrupting the load current
    • 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 multi-phase load selector for step transformers according to the preamble of claim 1.
  • Load selectors of this type are known: publication of the Reinhausen machine factory "step switch type H" 0385/500 MR.
  • the preselector arranged on the side of the load selector is designed as an independent unit with its own head for a second flange provided in the step transformer.
  • the preselector is driven by a linkage arranged on the outer surface of the transformer, which is coupled to the drive of the load selector.
  • Load selectors are also known, in which the selection is provided as a direct component of the actual load selector in the upper or in the lower part of the oil container (DE-C-29 13 271, DE-A-33 10 741).
  • the preselector is located in the oil of the load selector, which is subject to contamination, and this arrangement is therefore not so well suited for high voltages, especially since the isolation distances for the preselector cannot be increased arbitrarily because of the spatial conditions provided for the load selector.
  • the division of the preselector into an upper and a lower part also leads to a very complex drive device.
  • the object of the invention is to provide a multi-phase load selector with preselector of the type mentioned, which is designed as a structural unit with only one tap changer head receiving the drive device and is suitable for particularly high voltages.
  • the advantages achieved with the invention are in particular:
  • the selection is in the clean oil of the transformer.
  • the preselector contacts of a phase are approximately at the same level as the load selector contacts of the same phase, which means that the required connecting lines can be easily laid without crossing and which means that a favorable field distribution can be achieved from the start.
  • the drive of the preselector can be derived directly from the drive of the load selector.
  • the boom on the tap changer head is expediently designed to be hollow, the cavity of the boom communicating with the interior of the tap changer head.
  • An actuating lever for the selector shaft of the preselector can then be arranged in this cavity and can be actuated directly by the Maltese or the drive wheel of the load selector by means of a stop.
  • the drive for the selection is thus particularly simple.
  • the design as a tubular segment with a cylindrical shell as a wall enables the fixed contacts of the preselector to sit in the wall of the tubular segment and that polarization resistances can be arranged next to these contacts on the inside of the wall. It is also possible to provide an additional polarity switch in a particularly simple and space-saving manner, so that - which is desired in many cases - the auxiliary circuit for connecting the control winding only needs to be closed during the actual turning process.
  • auxiliary circuit which serves to link the control winding to a certain potential, in particular when the control winding is switched over by means of the reverser.
  • the auxiliary circuit can also be permanently installed, so that when the load selector is installed in the step transformer, only the center tap of the control winding needs to be connected to the free connection contact of the series connection of the polarization resistors. This arrangement leads to a particularly compact design with minimal space requirements and nevertheless high dielectric strength.
  • the polarity resistances are on both sides of the insulating material wall of the pipe segment.
  • FIGS. 3 to 7 only the tubular segment of the turner is shown in sections for the sake of clarity.
  • the multi-phase load selector consists of a cylindrical oil tank 1 with a tap changer head 2 and with an oil tank bottom 3.
  • the oil tank 1 consisting essentially of an insulating material cylinder, carries a series of fixed step contacts 4 for each phase, which are connected with the Inside the oil container, movable contacts - not shown in detail - work together.
  • the movable contacts are moved by a switching tube 5 (FIG. 2), which is actuated via a drive wheel 6 arranged in the tap changer head 2.
  • the load selector can be placed with a collar 19 of the tap changer head 2 in the usual way on a corresponding flange of the transformer.
  • the preselector 7 To the side of the actual load selector, ie to the side of the cylindrical oil tank 1, is the preselector 7, which extends over the entire height of the load selector. It is supported by a bracket 8 seated on the oil tank bottom 3 and by a bracket 9 seated on the tap changer head 2.
  • the selection 7 is designed as a tube segment, the switching shaft 10 being arranged in the center of the tube segment and being mounted in the arms 8 and 9.
  • the shell-shaped wall 11 of the pipe segment carries the fixed preselector contacts 12, which for each phase are approximately at the same height as the fixed step contacts 4 of the load selector.
  • the associated movable selector contacts 13 are carried and moved by the selector shaft 10 in the usual way.
  • special shielding electrodes 14 are provided between the phases and between phase and earth potential.
  • the arm 9 seated on the tap changer head 2 is provided with a cavity 15.
  • the selector shaft 10 of the preselector extends into this cavity 15 with its journal 16.
  • a lever 17 for actuating the selector shaft 10 is provided on the journal 16 within the cavity 15. This lever 17 is actuated by means of a stop 18, which sits on the drive wheel 6 of the load selector proper.
  • the wall 11 of the tube segment which is held by the brackets 8 of the cylindrical load selector (not shown here), carries fixed reversing contacts 121, 122, 123, of which 123 is the center contact of the turning device.
  • a movable contact optionally establishes an electrical connection of the center contact 123 either with the fixed reversing contact 121 or with the reversing contact 122.
  • shielding electrodes 14 are provided, which are connected by potential connections 141, 142 to the reversing contacts 122 and 123, respectively.
  • FIG. 3 shows, in addition to the reversing contacts 121, 122 and 123, on both sides 111, 112 of the wall 11, in a series connection in a zigzag arrangement, a plurality of rod-shaped polarization resistors 20 are arranged, the one end 21 of which, as far as possible, does not provide a polarity switch is - by means of a electrical line 22 are connected to the center contact 123 of the turner and which are guided with their other end 23 and a further electrical line 24 to a further connection contact 25, which is seated in the wall 11.
  • the center tap of the control winding is connected to this connection contact 25 when the load selector is installed in the step transformer, so that the auxiliary circuit for the potential connection of the control winding is constantly closed.
  • this auxiliary circuit is not constantly closed because of the losses associated therewith, but is only closed during the actual turning operation, which requires an additional polarity switch.
  • Such an additional polarity switch is also provided in the area of the reversing contacts 121, 122, 123 on the inside 111 of the wall 11. Details of the polarity switch are shown in particular in FIGS. 6 and 7.
  • the polarity switch is instead of the electrical line 22 shown in dashed lines in FIG. 3. It has a contact arm 26 which is mounted on the inside 111 of the wall 11 and is held in its open position by a compression spring 27. It is electrically connected to the center contact 123 (FIGS. 3 and 4) of the turner.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Housings And Mounting Of Transformers (AREA)
  • Gas-Insulated Switchgears (AREA)
  • Transformers For Measuring Instruments (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Electrotherapy Devices (AREA)

Claims (5)

  1. Sélecteur de charge polyphasé pour transformateurs à échelons, comportant un carter cylindrique (1) étanche à l'huile pourvu d'une tête de commutateur à échelons (2) et d'un fond (3) de réservoir d'huile, ce sélecteur pouvant se monter, par un collet supérieur (19) de la tête du commutateur à échelons (2), sur une bride du carter du transformateur à échelons, et comportant également un présélecteur (7) disposé latéralement par rapport au sélecteur de charge et dont les contacts mobiles (13) sont portés par un arbre de commutation (10), caractérisé en ce que le présélecteur (7) s'étendant sur toute la hauteur du sélecteur de charge est réalisé sous la forme d'un segment tubulaire relié à chacun de deux bras de support (8, 9) de la tête (2) du commutateur à échelons et du fond (3) du réservoir d'huile, et au centre duquel se trouve l'arbre de commutation (10) du présélecteur, monté dans les bras de support (8, 9), les contacts (12, 13) du présélecteur se situant pour chaque phase, à peu près dans le même plan que les contacts (4) du sélecteur de charge.
  2. Sélecteur de charge polyphasé selon la revendication 1, caractérisé en ce que le bras de support (9) fixé à la tête (2) du commutateur à échelons comporte une cavité (15) en liaison avec l'intérieur de cette tête, l'arbre (10) du présélecteur (7) pénétrant par son tourillon supérieur (16) dans cette cavité, et un levier de manoeuvre (17) logé dans cette cavité est relié au tourillon (16) de l'arbre du présélecteur.
  3. Sélecteur de charge polyphasé selon la revendication 1 ou 2, caractérisé en ce que les contacts fixes (12) du présélecteur (7) sont disposés dans la paroi (11) du segment tubulaire, et en ce que des résistances de polarité (20) sont montées sur la face intérieure de cette paroi à côté de ces contacts.
  4. Sélecteur de charge polyphasé selon la revendication 3, caractérisé en ce que des deux côtés (111, 112) de la paroi (11) du segment tubulaire sont prévues plusieurs résistances de polarité (20) en forme de barres, reliées en zigzag à travers cette paroi suivant un montage en série, dont l'une de ses extrémités (21) aboutit au contact central (123) de l'inverseur, et dont l'autre extrémité (23) est reliée à un contact de raccordement (25) additionnel fixé dans la paroi (11) du segment tubulaire.
  5. Sélecteur de charge polyphasé selon la revendication 3 ou 4, caractérisé en ce que dans le segment tubulaire est disposé pour chaque phase, à côté des résistances de polarité, un commutateur de polarité, et en ce que ce commutateur de polarité comporte un levier de contact (26) monté sur la face intérieure (111) de la paroi (11) du segment tubulaire, et branché au potentiel du contact central (123) de l'inverseur, ce levier pouvant pivoter, sous l'action d'une coulisse (28) fixée à l'arbre (10) de l'inverseur, contre le contact de polarité fixe (29) correspondant, disposé dans la paroi (11), l'une des extrémités du montage série des résistances de polarité (20) aboutissant au contact de polarité (29) fixe servant de contact de raccordement (291).
EP87109335A 1986-07-05 1987-06-29 Sélecteur de charge pour transformateurs à échelons pourvu d'un sélecteur préliminaire Expired - Lifetime EP0252400B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87109335T ATE72359T1 (de) 1986-07-05 1987-06-29 Mit vorwaehler versehener lastwaehler fuer stufentransformatoren.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3622716 1986-07-05
DE19863622716 DE3622716A1 (de) 1986-07-05 1986-07-05 Mit vorwaehler versehener lastwaehler fuer stufentransformatoren
DE19863644206 DE3644206A1 (de) 1986-12-23 1986-12-23 Mit vorwaehler versehener lastwaehler fuer stufentransformatoren
DE3644206 1986-12-23

Publications (3)

Publication Number Publication Date
EP0252400A2 EP0252400A2 (fr) 1988-01-13
EP0252400A3 EP0252400A3 (en) 1989-11-02
EP0252400B1 true EP0252400B1 (fr) 1992-01-29

Family

ID=25845329

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87109335A Expired - Lifetime EP0252400B1 (fr) 1986-07-05 1987-06-29 Sélecteur de charge pour transformateurs à échelons pourvu d'un sélecteur préliminaire

Country Status (7)

Country Link
EP (1) EP0252400B1 (fr)
JP (1) JP2609248B2 (fr)
KR (1) KR960013034B1 (fr)
CN (1) CN1013718B (fr)
AT (1) ATE72359T1 (fr)
DE (1) DE3776434D1 (fr)
IN (1) IN169357B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102709106A (zh) * 2012-05-17 2012-10-03 上海华明电力设备集团有限公司 真空灭弧转换选择器

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19836463C1 (de) 1998-08-12 1999-10-21 Reinhausen Maschf Scheubeck Stufenschalter mit einem Vorwähler
DE10312176B3 (de) * 2003-03-19 2004-06-09 Maschinenfabrik Reinhausen Gmbh Lastumschalter für einen Stufenschalter
US8153916B2 (en) * 2008-08-14 2012-04-10 Cooper Technologies Company Tap changer switch
DE102011008702B4 (de) * 2011-01-15 2015-01-08 Maschinenfabrik Reinhausen Gmbh Stufenschalter mit einem Vorwähler
CN102623155A (zh) * 2011-01-30 2012-08-01 上海华明电力设备制造有限公司 整体插拔式复合型真空有载分接开关
DE102011014325B4 (de) * 2011-03-18 2014-11-27 Maschinenfabrik Reinhausen Gmbh Laststufenschalter
DE102013107549B4 (de) * 2013-07-16 2017-11-30 Maschinenfabrik Reinhausen Gmbh Lastwähler für Stufentransformatoren und Trägerarm für einen Vorwähler des Lastwählers
DE102013019595B4 (de) * 2013-11-25 2016-02-25 Maschinenfabrik Reinhausen Gmbh Trägermodul und Trägergerüst für Polungswiderstände eines Stufenschalters, Befestigungselement für Polungswiderstände sowie Anordnung von Polungswiderständen eines Stufenschalters
DE102016203106A1 (de) * 2016-02-26 2017-08-31 Siemens Aktiengesellschaft Anordnung zur elektrostatischen Abschirmung einer elektrischen Anlage

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE552585A (fr) * 1956-01-07
BE628195A (fr) * 1962-02-08
US3783206A (en) * 1972-07-06 1974-01-01 Westinghouse Electric Corp Tap changing apparatus with improved contact structure to eliminate electrical fields across open interrupter switches
DE2913271C2 (de) * 1979-04-03 1982-11-18 Maschinenfabrik Reinhausen Gebrüder Scheubeck GmbH & Co KG, 8400 Regensburg Dreiphasiger Lastwähler für Stufentransformatoren
DE3310741A1 (de) * 1983-03-24 1984-09-27 Transformatoren Union Ag, 7000 Stuttgart Lastwaehler zum schalten von stufenwicklungen eines dreiphasen-transformators
JPS6038014A (ja) * 1983-08-10 1985-02-27 Toray Ind Inc 濾過方法
JPS60240110A (ja) * 1984-05-15 1985-11-29 Toshiba Corp 負荷時タツプ切換器

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102709106A (zh) * 2012-05-17 2012-10-03 上海华明电力设备集团有限公司 真空灭弧转换选择器
CN102709106B (zh) * 2012-05-17 2015-03-11 上海华明电力设备集团有限公司 真空灭弧转换选择器

Also Published As

Publication number Publication date
EP0252400A3 (en) 1989-11-02
ATE72359T1 (de) 1992-02-15
JP2609248B2 (ja) 1997-05-14
DE3776434D1 (de) 1992-03-12
JPS6328016A (ja) 1988-02-05
CN87104614A (zh) 1988-01-27
EP0252400A2 (fr) 1988-01-13
CN1013718B (zh) 1991-08-28
IN169357B (fr) 1991-09-28
KR960013034B1 (ko) 1996-09-25
KR880002205A (ko) 1988-04-29

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