EP2686857B1 - Laststufenschalter - Google Patents

Laststufenschalter Download PDF

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Publication number
EP2686857B1
EP2686857B1 EP12705134.0A EP12705134A EP2686857B1 EP 2686857 B1 EP2686857 B1 EP 2686857B1 EP 12705134 A EP12705134 A EP 12705134A EP 2686857 B1 EP2686857 B1 EP 2686857B1
Authority
EP
European Patent Office
Prior art keywords
resistor
carrier
load tap
tap changer
changer according
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.)
Active
Application number
EP12705134.0A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2686857A1 (de
Inventor
Christian Böger
Toni Hottner
Martin Jatta
Philipp Lederer
Sebastian Rehkopf
Klaus Schlepp
Rolf Strempel
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
Publication of EP2686857A1 publication Critical patent/EP2686857A1/de
Application granted granted Critical
Publication of EP2686857B1 publication Critical patent/EP2686857B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01H9/0016—Contact arrangements for tap changers
    • 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
    • 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

Definitions

  • the invention relates to an on-load tap changer for uninterrupted switching between taps of a control winding of a tapped transformer.
  • the on-load tap changer has a rotatable switch column and a resistance carrier made of insulating material for receiving at least one switching resistor.
  • a wall of a Isolierstoffzylinders or on a Isolierstoffgerüst fixed stage contacts are arranged in at least one horizontal plane, which are electrically connected to the taps.
  • Centrally a rotatable switching shaft is arranged, which has mechanical contacts for each horizontal plane of fixed step contacts on a contact carrier, which are each connected to the fixed stage contacts.
  • At least one of the mechanical contacts on the contact carrier is electrically connected directly to a load dissipation.
  • At least one further contact on the contact carrier is electrically connected to a load dissipation of the on-load tap changer via the at least one intermediate overvoltage resistor, which comprises a wire helix arrangement.
  • On-load tap changer of the so-called load selector type is known.
  • This on-load tap changer has an insulating cylinder as a housing, solid fixed contacts, which are electrically connected to the taps of the control winding to be connected, are arranged in a circular manner in the wall of the insulating cylinder in several horizontal planes.
  • a rotatable switching shaft is arranged, which has mechanical contacts for each horizontal plane of fixed stage contacts on a contact carrier, which are contacted with the fixed stage contacts.
  • At least one of the movable contacts on the contact carrier is connected directly to a load dissipation; on the other hand, at least one further contact on the contact carrier is connected to the load discharge via an intermediate transfer resistor.
  • the over-resistance is used in a known manner to limit during the load switching, ie the uninterrupted change from a fixed tap contact to an adjacent other fixed tap contact, thereby briefly flowing circulating current.
  • the switching resistance itself is not mentioned in detail in this publication; in FIG. 3 he is there, to the right of the switch column, only hinted. He is in communication with the switching column and is rotated together with this.
  • the DE 38 33 126 A1 shows a similar on-load tap-changer type on-load tap changer in which a switching resistance is formed as a wire helix, which is guided on a spacer around the central switch column around. Again, the resistance is moved with the switch column.
  • a switching resistance is formed as a wire helix, which is guided on a spacer around the central switch column around. Again, the resistance is moved with the switch column.
  • the illustration shown in this publication is only schematic and can not be realized in the actual execution of an on-load tap-changer.
  • this leadership of the transfer resistance allows no modular design and no prefabrication as a separate, later mountable assembly.
  • the WO 2008/024067 A1 describes a special override resistor for an on-load tap-changer.
  • This switching resistor is designed as a package consisting of individual modules.
  • resistance wires are arranged in a planar frame parallel to each other, wherein there are gaps between the coiled resistance wires.
  • multi-superimposed frame can be modularly configure the mentioned package of total over-resistance.
  • These transfer resistors, more precisely the package are attached to a frame which carries the actual diverter switch.
  • over-resistance are therefore suitable for an on-load tap-changer with separate, movable selector and separate, fixed diverter switch for actual load switching. They are not suitable for use with the load dialer type explained in the introduction.
  • the patent US 3,546,653 A discloses a resistor assembly that may be used, for example, for a load switch. It consists of several resistor assemblies that are stacked inside a housing. The housing may be filled with cooling oil. The resistor assemblies are elongated and spaced apart by spacers. Each resistor assembly consists of a base member with ribs and a flat lid of insulating material defining a plurality of electrically isolated and concentrically arranged circular segment shaped wire channels. A single, continuous resistance wire with coiled wire sections is adapted to the wire channels so that it can be clamped in the base element. The ribs serve the electrical insulation of the individual wire sections.
  • the French patent application FR 2 320 000 A1 discloses a diverter switch for the uninterrupted load control of electrical transformers, comprising an outer and an inner insulating cylinder. On the inner insulating cylinder electrical contacts are attached.
  • resistance holders are disclosed which can be mounted on the inner insulating cylinder.
  • the characteristic feature of the resistor holder is a central, vertically oriented sheet assembly having orthogonally oriented side wings and lower and upper covers. From this structure arise straight, vertically aligned cells, each of which can accommodate a resistance coil. Chamfered slots are respectively provided in the lower and upper covers, into which the respective ends of a resistance coil can be inserted, so that the resistance coil is fixed in the cell under a slight tension.
  • the resistance coils which are installed in the cells of one or more resistance resistors, are connectable to each other and to the electrical contacts of the diverter switch by connectors.
  • a beak is formed with a nozzle.
  • the nozzle can be suspended in a blind hole which is formed in a ring placed on the insulating cylinder.
  • an orthogonally projecting plate is formed to align its position with the insulating cylinder.
  • the entire diverter switch is surrounded by an outer insulating cylinder.
  • the object of the invention is to provide a reliable on-load tap changer for uninterrupted switching between taps of a control winding of a tapped transformer, which can be equipped in a simple and cost-effective manner to save space and flexibility with Automatschaltwidercardn.
  • the invention is achieved by an on-load tap changer having the features of the first claim.
  • the subclaims relate to particularly advantageous developments of the invention.
  • the general inventive idea is to fix known wire helix by modular resistance holders and to attach these pre-assembled units on a resistance carrier, which in turn is attached to the switch column.
  • the resistance carrier according to the invention has a contour which corresponds to the geometric shape of the rotatable switch column.
  • corresponding other geometric cross sections of switch column and resistance carrier are also possible.
  • the advantage of the invention lies in particular in the simple, space-saving design with only a few components directly to the switch column. Furthermore, a pre-assembly of the entire resistor carrier is just as possible as a simple adaptation to a variety of resistance values.
  • FIG. 1 shows individual wire coil 1 of resistance wire, which are connected by connecting parts 2 each electrically connected to each other, form a complete wire coil assembly 3. It is within the scope of the invention also possible to provide only a single continuous wire helix, which is simply bent at the deflection. With both embodiments, a meander-shaped arrangement is achieved in which parts of the wire helix arrangement 3 run approximately parallel. Free contact ends 4 and 5 serve to electrically connect this wire helix arrangement; this will be discussed later. Different wire lengths and diameters can be selected to adapt to a wide variety of resistance values; for mounting the wire helix assembly 3 is clamped and fixed by means of a respective two-part resistor holder 6 of insulating material to preferably two areas.
  • FIG. 2 shows such a modular resistance holder 6 in two different perspective views.
  • Each resistance holder 6 has chambers 6 a, each receiving a wire coil 1.
  • the function of the Positionierstife 9 also shown on the closed side of the resistor holder 6 will be discussed later.
  • FIG. 3 shows a resistance carrier 10, to which the pre-assembled wire helix assembly 3, fixed by the described mirror-symmetrically clipped resistor holder 6, can be attached.
  • the resistance member 10 is made of insulating material and has a cylinder-segment-like contour whose curvature is adapted to the diameter of the - not shown-switch column 13.
  • the resistance carrier 10 is provided for the attachment of two separate preassembled overshoot resistors Stud1, Stud2; however, the invention is not limited thereto. Ultimately, it depends on the particular circuit of the concrete on-load tap-changer, how many separate switching resistors Stud1, Stud2 per phase to be switched are required.
  • the resistance carrier 10 has positioning bores 11, which correspond to the already explained positioning pins 9 of the resistance holders 6 to be mounted. Furthermore, openings 12 are provided which serve for fastening these resistance holders 6. Further connection angle 13 are provided, which will be explained later in more detail.
  • FIG. 4 shows a fully populated resistor carrier 10.
  • two mounted complete transfer resistors Hin1 and Hin2 each consisting of a wire coil 3, fixed on both sides by a total of four resistor holder 6, wherein two of them are joined together.
  • the actual attachment of the complete transfer resistors Stud1 and Stud2 carried by cable ties, which are guided and fixed by the openings 12 of the resistor carrier 10.
  • other attachment options such as by means of a clip connection or by screwing possible.
  • cable terminals 14 and 15 which are arranged at the connection angles 13 and establish the electrical connection to the beginning and end of the respective complete transfer resistance Scotland1, Scotland.
  • For better flow around the individual switching resistors Hin1, Hin2 from the insulating oil of the on-load tap changer and thus better cooling and to improve its mechanical strength of the resistance carrier 10 has openings 16, which are not all provided with reference numerals.
  • brackets still upper mounting grooves 17 and lower mounting grooves 18 are each provided on both sides of the cup-like resistor carrier 10.
  • the resistance holders 6 consist of identical individual parts, the here useless positioning pins 9 can be seen on the outwardly directed resistance holders 6.
  • FIG. 5 shows a completed switch column 19 of an on-load tap changer according to the invention.
  • a contact carrier 20 which is fixed to the switch column 19 and carries in known manner the movable contacts, by means of which upon rotation of the switch column 19, the fixed - not shown - contacts in the - also not shown - wall of the insulating cylinder of the On-load tap changer are connected in a known manner.
  • the attachment itself can also be done in other ways.
  • the on-load tap-changer has a particularly simple, inexpensive and reliable arrangement of the switching resistors Stud1, Stud2.
  • the wire helix arrangement 3 can be varied within wide limits in order to achieve a wide variety of resistance values.
  • the resistance holders 6 consist only of a single identical part, two of which, rotated by 180 degrees, can be clipped together; Mounting errors are virtually eliminated.
  • the resistance carrier 10 is also simple. It can record several override resistors Stud1, Hin2 - but this does not have to be. If only a single switching resistor Hin1, Hin2 provided, the other portion of the resistor carrier 10 is simply free.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Details Of Resistors (AREA)
  • Housings And Mounting Of Transformers (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Adjustable Resistors (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Regulation Of General Use Transformers (AREA)
EP12705134.0A 2011-03-18 2012-02-20 Laststufenschalter Active EP2686857B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011014325.4A DE102011014325B4 (de) 2011-03-18 2011-03-18 Laststufenschalter
PCT/EP2012/052866 WO2012126685A1 (de) 2011-03-18 2012-02-20 Laststufenschalter

Publications (2)

Publication Number Publication Date
EP2686857A1 EP2686857A1 (de) 2014-01-22
EP2686857B1 true EP2686857B1 (de) 2014-09-03

Family

ID=45722649

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12705134.0A Active EP2686857B1 (de) 2011-03-18 2012-02-20 Laststufenschalter

Country Status (8)

Country Link
EP (1) EP2686857B1 (zh)
CN (1) CN103415904B (zh)
BR (1) BR112013018969B1 (zh)
DE (1) DE102011014325B4 (zh)
ES (1) ES2525130T3 (zh)
HK (1) HK1189420A1 (zh)
UA (1) UA112177C2 (zh)
WO (1) WO2012126685A1 (zh)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013107552B4 (de) 2013-07-16 2017-03-16 Maschinenfabrik Reinhausen Gmbh Laststufenschalter
CN107546010B (zh) * 2017-08-16 2019-06-04 芜湖市凯鑫避雷器有限责任公司 一种变压器调压绕组结构
CN109637858B (zh) * 2018-12-12 2020-04-24 国网北京市电力公司 变压器开关组、变压器、变压器调容方法及装置
EP3761334B1 (en) * 2019-07-01 2024-01-24 Hitachi Energy Ltd Tap changer in power transformer
DE102019126168A1 (de) * 2019-09-27 2021-04-01 Maschinenfabrik Reinhausen Gmbh Widerstandsanordnung für stufenschalter und stufenschalter

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3546653A (en) * 1969-06-02 1970-12-08 Mc Graw Edison Co Resistor assembly
DE2434364C2 (de) * 1974-07-17 1976-09-02 Reinhausen Maschf Scheubeck Lastumschalter mit ueberschaltwiderstaenden fuer stufenschalter von stufentransformatoren
BE831951A (fr) * 1975-07-31 1976-02-02 Acec Support de resistances pour commutateur sous charge d'une installationde reglage en charge de la tension des transformateurs
IN169357B (zh) * 1986-07-05 1991-09-28 Reinhausen Maschf Scheubeck
DE3833126C2 (de) 1988-09-29 1995-11-30 Reinhausen Maschf Scheubeck Lastwähler für Stufentransformatoren
DE4231353C2 (de) * 1991-09-19 1997-07-24 Toshiba Kawasaki Kk Stufenschalter
DE9405427U1 (de) * 1994-03-30 1995-04-27 Maschinenfabrik Reinhausen Gmbh, 93059 Regensburg Lastwähler mit Überschaltwiderständen
DE19821775C1 (de) 1998-05-14 1999-10-14 Reinhausen Maschf Scheubeck Lastwähler
US20100090794A1 (en) 2006-08-25 2010-04-15 Abb Technology Ltd. A resistor for electric high-voltage apparatus and a method of mounting a resistor
CN101807472B (zh) * 2009-02-13 2012-08-08 上海华明电力设备制造有限公司 一种替换有载分接开关铜钨触头组的真空泡组

Also Published As

Publication number Publication date
ES2525130T3 (es) 2014-12-17
UA112177C2 (uk) 2016-08-10
BR112013018969A2 (pt) 2016-10-04
DE102011014325A1 (de) 2012-09-20
CN103415904B (zh) 2016-09-07
DE102011014325B4 (de) 2014-11-27
WO2012126685A1 (de) 2012-09-27
BR112013018969B1 (pt) 2020-10-13
CN103415904A (zh) 2013-11-27
HK1189420A1 (zh) 2014-06-06
EP2686857A1 (de) 2014-01-22

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