EP3069361B1 - Unité de contact - Google Patents

Unité de contact Download PDF

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Publication number
EP3069361B1
EP3069361B1 EP14796091.8A EP14796091A EP3069361B1 EP 3069361 B1 EP3069361 B1 EP 3069361B1 EP 14796091 A EP14796091 A EP 14796091A EP 3069361 B1 EP3069361 B1 EP 3069361B1
Authority
EP
European Patent Office
Prior art keywords
contact
unit according
housing
contact unit
previous
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
EP14796091.8A
Other languages
German (de)
English (en)
Other versions
EP3069361A1 (fr
Inventor
Christian Münzberg
Andreas Raith
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 EP3069361A1 publication Critical patent/EP3069361A1/fr
Application granted granted Critical
Publication of EP3069361B1 publication Critical patent/EP3069361B1/fr
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
    • H01H9/0044—Casings; Mountings; Disposition in transformer housing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
    • 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
    • H01H2235/00—Springs
    • H01H2235/01—Spiral spring

Definitions

  • the present invention relates to a contact unit for switching between winding taps of a control winding of a tapped transformer.
  • a contact unit is particularly preferred in electrical switching devices of high voltage technology, such as voters or switches, usable. Both types of devices is common that the switching between the winding taps of the control winding of the tapped transformer is completed without power.
  • DE 27 54 682 B describes a tap changer for a tap changer of tap-changer transformers with a dial column, which carries two concentric drive tubes and thereon per phase arranged in different planes contact rings which are connected to arranged in the interior of the dial column connection lines.
  • this document proposes that the supported by the inner drive tube contact bridge housing is fixed by means of one above and below the contact bridge arranged arcuate, the tube diameter adapted approach to the inner drive tube and that both these arcuate approaches as well as the contact bridge its own existing in the outer drive tube, extending around the circumference recess protrudes.
  • the actual contact element is formed in this document as a contact bridge, which produces an electrically conductive connection between the associated contact ring on the one hand and the selector terminal contact on the other.
  • the contact element is arranged in a fixedly connected to the drive tube contact bridge housing and thus difficult to access in case of maintenance, or interchangeable.
  • the assembly of the entire contact assembly for the manufacturer is cumbersome and time consuming.
  • DE 32 15 110 A1 describes a contact device for connecting conductors, consisting of a movable contact group with two movable contacts and a plurality of rod-shaped fixed contacts, which can be clamped individually between the movable contacts.
  • the movable contacts are housed in a U-shaped housing and are pressed towards each other by means of the guide pins or guide pins and by means of the compression springs which are arranged between the contacts and take effect.
  • the movable contact group and with it the housing are driven and moved by a drive mechanism.
  • DE 1 788 013 B describes a tap selector with tap changer for variable-speed transformers, the turntable having a moveable reversing contact fixed in a segment which in turn is attached to support bars.
  • US Pat. No. 3,812,309 describes a high voltage circuit breaker having a stationary jaw contact assembly, a pivotable switching blade assembly, and suitable connecting and operating elements for effecting movement of the switching blade to open and close the switch.
  • the stationary jaw contact assembly is mounted on a suitably anchored support structure.
  • the support structure has a generally U-shaped cross section and provides a frame to which the contacts of the jaw contact assembly are mounted to extend into a suitably shielded interior defined by the frame.
  • the frame is isolated from the ground potential by being properly anchored to a base member.
  • U-shaped loop contact elements are attached to opposite end walls of the frame.
  • Such loop contactors are typically made of an elastic material having suitable strength and electrical properties to conduct currents of the order of 1200A and more.
  • DE 1 139 917 B describes a rotary switch for power transformers, which consists of the hard paper cylinder, which is designed as a rotary switch and to which the contact carrier are attached. Furthermore, two-armed, scissor-shaped intermediate pieces are attached to these contact carriers, which are passed through recesses in the cylinder wall. Concentric around the cylinder insulating rods are arranged in a corresponding number, for example, carry trapezoidal knife contacts including their guides. In the interior of the cylinder, the drive shaft is provided, which is designed with respect to the torsional stiffness best as Isolierstoffhohlzylinder. In the wave special, firmly coupled with their intermediate pieces are inserted, which have band-shaped extensions.
  • DE 1 231 805 A describes a tap selector for tap changers of control transformers with fixed switching column with slip rings and rotatable about the switching column, externally driven contact bridges that provide the connection between the slip rings and arranged in a circle, fixed step connection contacts. It is envisaged that the switching column is divided like a box according to the number of phases of Anzapfduslers in individual, superimposed in the axial direction pipe sections of resin and each slip ring consists of two current rings, which are partially molded at the joints of adjacent pipe sections and serve to attach the pipe sections together.
  • the document DE 10 2007 023124 B3 relates to a switching arrangement with two operating positions for switching a winding during the transformer operation, wherein the switching commutes a through-current from one current path to another current path.
  • solid contacts are arranged in several horizontal planes around a rotatable switching shaft on a Isolierstoffgerüst having upper and lower contact fingers which are pressed apart and can be connected by an electrically conductive rail as a movable switching contact.
  • the document AT 303 899 B relates to a contact arrangement for stage selectors of control transformers with a contact bridge of two similar, superimposed, movable in a horizontal plane, at least one mating contact cushioned enclosing contact parts for bridging a fixed to a central column of votes current ring and fixed selector contacts, which are arranged in a circle around the dial column.
  • the general inventive idea is to receive the contact element of the contact unit in a separate contact housing, so that the contact element and the contact housing form a separate assembly and that the contact housing including the contact element in a recess provided in the contact holder can be fixed by means of a holding element.
  • the invention provides a contact unit for switching between winding taps of a control winding of a tapped transformer, which is easy to install and can be replaced quickly and easily in case of maintenance.
  • the contact housing is designed as a container which is open on two opposite sides, namely a front side and a rear side, and has a flange-like shielding ring in the region of the front side, on the outer circumference of the contact housing.
  • the contact housing for resilient mounting of the contact element on an upper side and / or underside each pen provide that penetrate the top and / or bottom of the contact housing and be arranged between the contact element and the spring springs compression springs.
  • the spring holder has a groove with a groove bottom and a has wedge-shaped ramp.
  • the holding element may be U-shaped, have a headband and hollow leg formed.
  • the headband can also be designed to positively engage in the latched state of the separate module and contact in the groove.
  • the legs of the retaining element can each have a compression spring be provided, which cooperates with a respective bolt provided on a cover, such that the fixed in the contact holder by means of fixing bolts lid squeezes the respective compression spring under a defined bias and thus presses the headband into the groove.
  • a slot may be provided in the contact element into which engages a fixedly arranged on the contact housing pin.
  • the contact element can be designed as a knife contact consisting of a plurality of individual contacts, which protrudes out of the contact housing in its longitudinal dimension on both sides.
  • the contact holder has at least one opening in which a receiving means, preferably a pultruded rod, can be received.
  • the receiving means may also be formed from hard paper or hard tissue.
  • FIG. 1a is a schematic representation of a contact unit according to the invention beispielhalft shown for a three-phase application in a selector or diverter for a tapped transformer.
  • Such electrical high-voltage switching devices such as voters or diverters, are known in the art for decades and are used for current and voltage-free switching between winding taps of a control winding of the tapped transformer.
  • Each of the in FIG. 1a represented contact unit according to the invention in this case has a contact holder 1, which is fastened to at least one pultruded rod, which serves as a receiving means 2 for the corresponding contact unit.
  • two substantially parallel bars arranged as receiving means 2 are provided.
  • the contact holder 1 may be formed as an injection molded part or as an SMC part and have a content of, for example, 50% glass fiber mixture.
  • the contact holder 1 is an electrically non-conductive component.
  • the contact holder 1 is preferably formed in one piece and provided for mechanical fixation, each with an opening 3 for each of the receiving means 2, in which the corresponding receiving means 2 is inserted and held firmly by means of fixing elements 4. Shown are in the FIG. 1a two openings 3, in which the two serving as receiving means 2 rods are inserted.
  • each opening 3 and the outer diameter of the corresponding receiving means 2 vary in this case by only a few tenths of a millimeter, such that the receiving means 2 is already supported by the insertion into the corresponding opening 3 substantially contact-only.
  • a mechanical positive connection is achieved.
  • each contact holder 1 has a recess 5, in which a separate contact housing 6 with a corresponding contact element 7 can be inserted and mechanically fixed by means of a holding element 8, not shown here.
  • the openings 3 of the corresponding contact holders 1 are arranged to the right of the respective recesses 5.
  • FIG. 1b shows a detailed view of a single contact unit, which is also arranged on two pultruded rods as a receiving means 2.
  • the contact holder 1 in the region of the openings 3, but also the recesses 5 a plurality of webs. Overall, this results in a particularly light and mechanically stable overall structure for the contact holder. 1
  • FIG. 2a and 2 B are shown in a detailed view or sectional view of the contact housing 6 with contact element 7 and the essential components for mounting the contact housing 6 together with the contact element 7 in the contact holder 1.
  • the made of a preferably electrically conductive material, in particular a conductive plastic, contact housing 6 is formed as a substantially cuboidal container, which is open on two opposite sides, namely on a front side 6.1 and a rear side 6.2.
  • a flange-like shield ring 9 is also provided in the region of the front side 6.1, on the outer circumference of the contact housing 6.
  • the contact element 7 is designed as a blade contact 7.1.
  • the front side 6.1 and the rear side 6.2 have the open sides of the contact housing 6 in its longitudinal dimension on both sides surmounted.
  • For the resilient mounting of the individual contact blades 7.1 ... 7.4 sees the contact housing 6 at a top 6.3 or bottom 6.4 each two penholder 10.1 and 10.2, which penetrate the top 6.3 and bottom 6.4 of the contact housing 6 and where on the contact blades 7.1 ... 7.4 facing inner sides for each of the contact blades 7.1 ... 7.4 each a compression spring 11.1 and 11.2 is arranged.
  • Thedonnauslenkiana the individual contact blades 7.1 ... 7.4 is defined by a provided in the respective contact blades 7.1 ...
  • the contact housing 6 including the components therein, ie the contact element 7, as well as the spring holder 10.1 and 10.2 form a pre-assembled separate assembly that is latched and releasably supported by simply pushing in the contact holder 1.
  • the contact housing 6 provides on the 6.1 front facing spring holder 10.1 a groove 14 with a groove bottom 14.1 and a wedge-shaped ramp 15 before, wherein a Retaining clip 16 of a substantially U-shaped retaining element 8, which in turn is accommodated in the contact holder 1, is designed such that the retaining clip 16 engages positively, ie accurately, in the groove 14 of the retaining element 8.
  • the headband 16 is pressed in the latched, ie mounted, state against the groove bottom 14.1 with a defined contact force is in hollow legs 18.1 and 18.2 of the U-shaped support member 8 each one in the FIG. 2a and 2 B not shown compression spring 19.1 and 19.2 provided, which cooperates with one provided on a cover 20 bolts 21.1 and 21.2, such that the fixed in the contact holder 1 by means of fixing bolts 22.1 and 22.2 fixed cover 20 with its bolts 21.1 and 21.2 the respective compression spring 19.1 and 19.2 compresses under a defined bias and thus presses the headband 16 in the groove 14.
  • FIG. 3 shows in a further sectional side view of the contact holder 1 with inserted contact housing 6.
  • the holding element 8 with the arranged in the hollow legs 18.1 and 18.2 compression springs 19.1 and 19.2 and the lid 20 with the bolts 21.1 and 21.2 of the recess 5 of the contact holder 1 assigned and mechanically fixed by means of the fixing bolts 22.1 and 22.2 in the recess 5.
  • this assembly is in the recess 5 of the contact holder 1, in which its associated components, namely the support member 8, the compression springs 19.1 and 19.2, the cover 20 and the fixing bolts 22.1 and 22.2 are pre-assembled, inserted in the direction of the arrow.
  • the retaining bracket 16 slides from the rear side 6.2 in the direction of the front side 6.1 on the upper or lower side 6.3 and 6.4 via the spring holder 10.1 and then over the ramp 15 until the retaining bracket 16 latches in the groove 14.
  • a tool between the two facing ends of the legs 18.1 and 18.2 are introduced and the bolts 21.1 and 21.2 against the spring force of the corresponding compression springs 19 are pressed apart until the headband 16th has lifted from the groove bottom 14.1 to the height difference of the groove 14 and the separate assembly can thus be pulled against the direction of the arrow from the recess 5 of the contact holder 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Claims (15)

  1. Unité de contact permettant d'effectuer une commutation entre des prises d'enroulement d'un enroulement de réglage d'un transformateur à gradins comprenant :
    - au moins un moyen de réception (2),
    - un support de contact (1) qui est positionné sur le moyen de réception (2) et peut être fixé mécaniquement sur celui-ci et est situé dans un évidement (5),
    - un élément de contact (7) réalisé en un matériau électriquement conducteur,
    - un boîtier de contact séparé (6) dans lequel est logé l'élément de contact (7) de sorte que l'élément de contact (7) et le boîtier de contact (6) forment un ensemble séparé,
    caractérisée en ce que
    le boîtier de contact (6) y compris l'élément de contact (7) est inséré dans l'évidement (5) et est fixé au moyen d'un élément de retenue (8).
  2. Unité de contact conforme à la revendication précédente,
    dans laquelle :
    - le boîtier de contact (6) est réalisé sous la forme d'un réceptacle qui est ouvert sur deux côtés opposés, à savoir un côté avant (6.1) et un côté arrière (6.2) et comporte, dans la zone du côté avant (6.1) sur la périphérie externe du boîtier de contact (6) un anneau de protection en forme de bride (9).
  3. Unité de contact conforme à l'une des revendications précédentes, dans laquelle :
    - le boîtier de contact (6) comporte un support de ressort respectif (10.1, 10.2), pour permettre un montage élastique de l'élément de contact (7) sur son côté supérieur (6.3) et/ou sur son côté inférieur (6.4).
  4. Unité de contact conforme à la revendication 3,
    dans laquelle :
    - le support de ressort respectif (10.1, 10.2) pénètre dans le côté supérieur (6.3) et/ou le côté inférieur (6.4) du boîtier de contact (6) et, entre l'élément de contact (7) et le support de ressort (10.1, 10.2) correspondant est respectivement positionné un ressort de pression (11.1, 11.2).
  5. Unité de contact conforme à l'une des revendications 3 et 4,
    dans laquelle le support de ressort (10.1) comporte une rainure (14) ayant un fond de rainure (14.1) ainsi qu'une rampe (15) en forme de coin.
  6. Unité de contact conforme à l'une des revendications précédentes, dans laquelle l'élément de retenue (8) est en forme de U et comporte un étrier de retenue (16) et des branches (18.1, 18.2).
  7. Unité de contact conforme à la revendication précédente,
    dans laquelle les branches (18.1, 18.2) sont creuses.
  8. Unité de contact conforme à la revendication 5 et à l'une des revendications 6 et 7,
    dans laquelle l'étrier de retenue (16) est réalisé pour pouvoir venir en prise par une liaison par la forme et par une liaison par contact dans la rainure (14) lorsque les ensembles séparés sont encliquetés.
  9. Unité de contact conforme à l'une des revendications 6 à 8,
    dans laquelle
    - dans les branches (18.1, 18.2) de l'élément de retenue (8) il est respectivement prévu un ressort de pression (19.1, 19.2) qui coopère avec un boulon respectif (21.1, 21.2) monté sur un couvercle (20) de sorte que le couvercle (20), maintenu solidairement dans le support de contact (1) au moyen de boulons de fixation (22.1, 22.2), comprime au moyen de ces boulons (21.1, 21.2) les ressorts de pression respectifs (19.1, 19.2) avec une précontrainte définie et comprime ainsi l'étrier de retenue (16) dans la rainure (14).
  10. Unité de contact conforme à l'une des revendications précédentes, dans laquelle dans l'élément de contact (7) il est prévu un trou oblong (12) dans lequel vient en prise une broche (13) fixée solidairement sur le boîtier de contact (6).
  11. Unité de contact conforme à l'une des revendications précédentes, dans laquelle l'élément de contact (7) est réalisé sous la forme d'un contact à lames (7.1...7.4) constitué de plusieurs contacts individuels qui dépasse par son extension longitudinale de deux côtés du boîtier de contact (6).
  12. Unité de contact conforme à la revendication 1,
    dans laquelle le support de contact (1) comporte au moins une ouverture (3) dans laquelle peut être logé le moyen de réception (2).
  13. Unité de contact conforme à la revendication précédente,
    dans laquelle le moyen de réception (2) est réalisé sous la forme d'une barre pultrudée ou en papier kraft ou en un tissu dur.
  14. Unité de contact conforme à la revendication 12,
    dans laquelle l'évidement (5) du support de contact (1) est situé entre et/ou latéralement à proximité des ouvertures (3).
  15. Utilisation d'une unité de contact conforme à l'une des revendications précédentes dans un sélecteur ou un ajusteur de tension.
EP14796091.8A 2013-11-12 2014-11-10 Unité de contact Active EP3069361B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201310112405 DE102013112405A1 (de) 2013-11-12 2013-11-12 Kontakteinheit
PCT/EP2014/074140 WO2015071209A1 (fr) 2013-11-12 2014-11-10 Unité de contact

Publications (2)

Publication Number Publication Date
EP3069361A1 EP3069361A1 (fr) 2016-09-21
EP3069361B1 true EP3069361B1 (fr) 2019-06-05

Family

ID=51871043

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14796091.8A Active EP3069361B1 (fr) 2013-11-12 2014-11-10 Unité de contact

Country Status (7)

Country Link
US (1) US9793067B2 (fr)
EP (1) EP3069361B1 (fr)
CN (1) CN105723487B (fr)
DE (1) DE102013112405A1 (fr)
ES (1) ES2744305T3 (fr)
UA (1) UA119754C2 (fr)
WO (1) WO2015071209A1 (fr)

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1139917B (de) * 1957-01-28 1962-11-22 Licentia Gmbh Drehumsteller fuer Leistungstransformatoren mit jeweils aus Kontaktbacken und Messerkontakt gebildeten Kontakteinheiten
NL94688C (fr) * 1958-05-02 1960-06-15
DE1788013B1 (de) * 1968-09-14 1971-12-02 Reinhausen Maschf Scheubeck Stufenwaehler mit wender fuer stufenschalter von re geltransfor matoren
BE758459A (fr) * 1969-11-03 1971-04-16 Reinhausen Maschf Scheubeck Pont de contact pour sélecteurs de gradins destinés à des transformateurs de réglage
US3812309A (en) * 1972-11-06 1974-05-21 Gulton Ind Inc Electrical switch with high pressure contacts
DE2754682C2 (de) 1977-12-08 1980-02-07 Maschinenfabrik Reinhausen Gebrueder Scheubeck Gmbh & Co Kg, 8400 Regensburg Stufenwähler fur Stufenschalter von Stufentransformatoren
JPS57180013A (en) * 1981-04-28 1982-11-05 Tokyo Shibaura Electric Co Contact for tap changer
DE102007023124B3 (de) * 2007-05-16 2008-10-02 Maschinenfabrik Reinhausen Gmbh Schaltanordnung
CN101383233B (zh) * 2008-02-26 2010-09-08 上海华明电力设备制造有限公司 一种分接开关用的动触头
US7872203B2 (en) * 2008-08-14 2011-01-18 Cooper Technologies Company Dual voltage switch
CN202711965U (zh) * 2012-04-23 2013-01-30 莱茵豪森机械制造公司 用于分级变压器的选级器的接触装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
ES2744305T3 (es) 2020-02-24
CN105723487A (zh) 2016-06-29
DE102013112405A1 (de) 2015-05-13
US20160293351A1 (en) 2016-10-06
CN105723487B (zh) 2019-06-04
EP3069361A1 (fr) 2016-09-21
US9793067B2 (en) 2017-10-17
WO2015071209A1 (fr) 2015-05-21
UA119754C2 (uk) 2019-08-12

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